--- /dev/null
+/* GStreamer
+ * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
+ * Copyright (C) 2005-2009 Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * gsttypefindfunctions.c: collection of various typefind functions
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <glib.h>
+#include <glib/gprintf.h>
+
+/* don't want to add gio xdgmime typefinder if gio was disabled via configure */
+#ifdef HAVE_GIO
+#include <gio/gio.h>
+#define USE_GIO
+#endif
+
+#include <gst/gst.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <gst/pbutils/pbutils.h>
+
+GST_DEBUG_CATEGORY_STATIC (type_find_debug);
+#define GST_CAT_DEFAULT type_find_debug
+
+/* DataScanCtx: helper for typefind functions that scan through data
+ * step-by-step, to avoid doing a peek at each and every offset */
+
+#define DATA_SCAN_CTX_CHUNK_SIZE 4096
+
+typedef struct
+{
+ guint64 offset;
+ const guint8 *data;
+ gint size;
+} DataScanCtx;
+
+static inline void
+data_scan_ctx_advance (GstTypeFind * tf, DataScanCtx * c, guint bytes_to_skip)
+{
+ c->offset += bytes_to_skip;
+ if (G_LIKELY (c->size > bytes_to_skip)) {
+ c->size -= bytes_to_skip;
+ c->data += bytes_to_skip;
+ } else {
+ c->data += c->size;
+ c->size = 0;
+ }
+}
+
+static inline gboolean
+data_scan_ctx_ensure_data (GstTypeFind * tf, DataScanCtx * c, gint min_len)
+{
+ const guint8 *data;
+ guint64 len;
+ guint chunk_len = MAX (DATA_SCAN_CTX_CHUNK_SIZE, min_len);
+
+ if (G_LIKELY (c->size >= min_len))
+ return TRUE;
+
+ data = gst_type_find_peek (tf, c->offset, chunk_len);
+ if (G_LIKELY (data != NULL)) {
+ c->data = data;
+ c->size = chunk_len;
+ return TRUE;
+ }
+
+ /* if there's less than our chunk size, try to get as much as we can, but
+ * always at least min_len bytes (we might be typefinding the first buffer
+ * of the stream and not have as much data available as we'd like) */
+ len = gst_type_find_get_length (tf);
+ if (len > 0) {
+ len = CLAMP (len - c->offset, min_len, chunk_len);
+ } else {
+ len = min_len;
+ }
+
+ data = gst_type_find_peek (tf, c->offset, len);
+ if (data != NULL) {
+ c->data = data;
+ c->size = len;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static inline gboolean
+data_scan_ctx_memcmp (GstTypeFind * tf, DataScanCtx * c, guint offset,
+ const gchar * data, guint len)
+{
+ if (!data_scan_ctx_ensure_data (tf, c, offset + len))
+ return FALSE;
+
+ return (memcmp (c->data + offset, data, len) == 0);
+}
+
+/*** text/plain ***/
+static gboolean xml_check_first_element (GstTypeFind * tf,
+ const gchar * element, guint elen, gboolean strict);
+static gboolean sdp_check_header (GstTypeFind * tf);
+
+static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
+
+#define UTF8_CAPS gst_static_caps_get(&utf8_caps)
+
+static gboolean
+utf8_type_find_have_valid_utf8_at_offset (GstTypeFind * tf, guint64 offset,
+ GstTypeFindProbability * prob)
+{
+ guint8 *data;
+
+ /* randomly decided values */
+ guint min_size = 16; /* minimum size */
+ guint size = 32 * 1024; /* starting size */
+ guint probability = 95; /* starting probability */
+ guint step = 10; /* how much we reduce probability in each
+ * iteration */
+
+ while (probability > step && size > min_size) {
+ data = gst_type_find_peek (tf, offset, size);
+ if (data) {
+ gchar *end;
+ gchar *start = (gchar *) data;
+
+ if (g_utf8_validate (start, size, (const gchar **) &end) || (end - start + 4 > size)) { /* allow last char to be cut off */
+ *prob = probability;
+ return TRUE;
+ }
+ *prob = 0;
+ return FALSE;
+ }
+ size /= 2;
+ probability -= step;
+ }
+ *prob = 0;
+ return FALSE;
+}
+
+static void
+utf8_type_find (GstTypeFind * tf, gpointer unused)
+{
+ GstTypeFindProbability start_prob, mid_prob;
+ guint64 length;
+
+ /* leave xml to the xml typefinders */
+ if (xml_check_first_element (tf, "", 0, TRUE))
+ return;
+
+ /* leave sdp to the sdp typefinders */
+ if (sdp_check_header (tf))
+ return;
+
+ /* check beginning of stream */
+ if (!utf8_type_find_have_valid_utf8_at_offset (tf, 0, &start_prob))
+ return;
+
+ GST_LOG ("start is plain text with probability of %u", start_prob);
+
+ /* POSSIBLE is the highest probability we ever return if we can't
+ * probe into the middle of the file and don't know its length */
+
+ length = gst_type_find_get_length (tf);
+ if (length == 0 || length == (guint64) - 1) {
+ gst_type_find_suggest (tf, MIN (start_prob, GST_TYPE_FIND_POSSIBLE),
+ UTF8_CAPS);
+ return;
+ }
+
+ if (length < 64 * 1024) {
+ gst_type_find_suggest (tf, start_prob, UTF8_CAPS);
+ return;
+ }
+
+ /* check middle of stream */
+ if (!utf8_type_find_have_valid_utf8_at_offset (tf, length / 2, &mid_prob))
+ return;
+
+ GST_LOG ("middle is plain text with probability of %u", mid_prob);
+ gst_type_find_suggest (tf, (start_prob + mid_prob) / 2, UTF8_CAPS);
+}
+
+/*** text/uri-list ***/
+
+static GstStaticCaps uri_caps = GST_STATIC_CAPS ("text/uri-list");
+
+#define URI_CAPS (gst_static_caps_get(&uri_caps))
+#define BUFFER_SIZE 16 /* If the string is < 16 bytes we're screwed */
+#define INC_BUFFER { \
+ pos++; \
+ if (pos == BUFFER_SIZE) { \
+ pos = 0; \
+ offset += BUFFER_SIZE; \
+ data = gst_type_find_peek (tf, offset, BUFFER_SIZE); \
+ if (data == NULL) return; \
+ } else { \
+ data++; \
+ } \
+}
+static void
+uri_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, BUFFER_SIZE);
+ guint pos = 0;
+ guint offset = 0;
+
+ if (data) {
+ /* Search for # comment lines */
+ while (*data == '#') {
+ /* Goto end of line */
+ while (*data != '\n') {
+ INC_BUFFER;
+ }
+
+ INC_BUFFER;
+ }
+
+ if (!g_ascii_isalpha (*data)) {
+ /* Had a non alpha char - can't be uri-list */
+ return;
+ }
+
+ INC_BUFFER;
+
+ while (g_ascii_isalnum (*data)) {
+ INC_BUFFER;
+ }
+
+ if (*data != ':') {
+ /* First non alpha char is not a : */
+ return;
+ }
+
+ /* Get the next 2 bytes as well */
+ data = gst_type_find_peek (tf, offset + pos, 3);
+ if (data == NULL)
+ return;
+
+ if (data[1] != '/' && data[2] != '/') {
+ return;
+ }
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, URI_CAPS);
+ }
+}
+
+/*** application/x-hls ***/
+
+static GstStaticCaps hls_caps = GST_STATIC_CAPS ("application/x-hls");
+#define HLS_CAPS (gst_static_caps_get(&hls_caps))
+
+/* See http://tools.ietf.org/html/draft-pantos-http-live-streaming-05 */
+static void
+hls_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 7)))
+ return;
+
+ if (memcmp (c.data, "#EXTM3U", 7))
+ return;
+
+ data_scan_ctx_advance (tf, &c, 7);
+
+ /* Check only the first 256 bytes */
+ while (c.offset < 256) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 21)))
+ return;
+
+ /* Search for # comment lines */
+ if (c.data[0] == '#' && (memcmp (c.data, "#EXT-X-TARGETDURATION", 21) == 0
+ || memcmp (c.data, "#EXT-X-STREAM-INF", 17) == 0)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HLS_CAPS);
+ return;
+ }
+
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+}
+
+
+/*** application/xml **********************************************************/
+
+#define XML_BUFFER_SIZE 16
+#define XML_INC_BUFFER { \
+ pos++; \
+ if (pos == XML_BUFFER_SIZE) { \
+ pos = 0; \
+ offset += XML_BUFFER_SIZE; \
+ data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
+ if (data == NULL) return FALSE; \
+ } else { \
+ data++; \
+ } \
+}
+
+static gboolean
+xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
+ gboolean strict)
+{
+ gboolean got_xmldec;
+ guint8 *data;
+ guint offset = 0;
+ guint pos = 0;
+
+ data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
+ if (!data)
+ return FALSE;
+
+ /* look for the XMLDec
+ * see XML spec 2.8, Prolog and Document Type Declaration
+ * http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
+ got_xmldec = (memcmp (data, "<?xml", 5) == 0);
+
+ if (strict && !got_xmldec)
+ return FALSE;
+
+ /* skip XMLDec in any case if we've got one */
+ if (got_xmldec) {
+ pos += 5;
+ data += 5;
+ }
+
+ /* look for the first element, it has to be the requested element. Bail
+ * out if it is not within the first 4kB. */
+ while (data && (offset + pos) < 4096) {
+ while (*data != '<' && (offset + pos) < 4096) {
+ XML_INC_BUFFER;
+ }
+
+ XML_INC_BUFFER;
+ if (!g_ascii_isalpha (*data)) {
+ /* if not alphabetic, it's a PI or an element / attribute declaration
+ * like <?xxx or <!xxx */
+ XML_INC_BUFFER;
+ continue;
+ }
+
+ /* the first normal element, check if it's the one asked for */
+ data = gst_type_find_peek (tf, offset + pos, elen + 1);
+ return (data && element && strncmp ((char *) data, element, elen) == 0);
+ }
+
+ return FALSE;
+}
+
+static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
+
+#define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
+static void
+xml_type_find (GstTypeFind * tf, gpointer unused)
+{
+ if (xml_check_first_element (tf, "", 0, TRUE)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
+ }
+}
+
+/*** application/sdp *********************************************************/
+
+static GstStaticCaps sdp_caps = GST_STATIC_CAPS ("application/sdp");
+
+#define SDP_CAPS (gst_static_caps_get(&sdp_caps))
+static gboolean
+sdp_check_header (GstTypeFind * tf)
+{
+ guint8 *data;
+
+ data = gst_type_find_peek (tf, 0, 5);
+ if (!data)
+ return FALSE;
+
+ /* sdp must start with v=0[\r]\n */
+ if (memcmp (data, "v=0", 3))
+ return FALSE;
+
+ if (data[3] == '\r' && data[4] == '\n')
+ return TRUE;
+ if (data[3] == '\n')
+ return TRUE;
+
+ return FALSE;
+}
+
+static void
+sdp_type_find (GstTypeFind * tf, gpointer unused)
+{
+ if (sdp_check_header (tf))
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDP_CAPS);
+}
+
+/*** application/smil *********************************************************/
+
+static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
+
+#define SMIL_CAPS (gst_static_caps_get(&smil_caps))
+static void
+smil_type_find (GstTypeFind * tf, gpointer unused)
+{
+ if (xml_check_first_element (tf, "smil", 4, FALSE)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
+ }
+}
+
+/*** text/html ***/
+
+static GstStaticCaps html_caps = GST_STATIC_CAPS ("text/html");
+
+#define HTML_CAPS gst_static_caps_get (&html_caps)
+
+static void
+html_type_find (GstTypeFind * tf, gpointer unused)
+{
+ gchar *d, *data;
+
+ data = (gchar *) gst_type_find_peek (tf, 0, 16);
+ if (!data)
+ return;
+
+ if (!g_ascii_strncasecmp (data, "<!DOCTYPE HTML", 14)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
+ } else if (xml_check_first_element (tf, "html", 4, FALSE)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
+ } else if ((d = memchr (data, '<', 16))) {
+ data = (gchar *) gst_type_find_peek (tf, d - data, 6);
+ if (data && g_ascii_strncasecmp (data, "<html>", 6) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
+ }
+ }
+}
+
+/*** audio/midi ***/
+
+static GstStaticCaps mid_caps = GST_STATIC_CAPS ("audio/midi");
+
+#define MID_CAPS gst_static_caps_get(&mid_caps)
+static void
+mid_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ /* http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html */
+ if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
+ && data[3] == 'd')
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MID_CAPS);
+}
+
+/*** audio/mobile-xmf ***/
+
+static GstStaticCaps mxmf_caps = GST_STATIC_CAPS ("audio/mobile-xmf");
+
+#define MXMF_CAPS gst_static_caps_get(&mxmf_caps)
+static void
+mxmf_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = NULL;
+
+ /* Search FileId "XMF_" 4 bytes */
+ data = gst_type_find_peek (tf, 0, 4);
+ if (data && data[0] == 'X' && data[1] == 'M' && data[2] == 'F'
+ && data[3] == '_') {
+ /* Search Format version "2.00" 4 bytes */
+ data = gst_type_find_peek (tf, 4, 4);
+ if (data && data[0] == '2' && data[1] == '.' && data[2] == '0'
+ && data[3] == '0') {
+ /* Search TypeId 2 1 byte */
+ data = gst_type_find_peek (tf, 11, 1);
+ if (data && data[0] == 2) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXMF_CAPS);
+ }
+ }
+ }
+}
+
+
+/*** video/x-fli ***/
+
+static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
+
+#define FLX_CAPS gst_static_caps_get(&flx_caps)
+static void
+flx_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 134);
+
+ if (data) {
+ /* check magic and the frame type of the first frame */
+ if ((data[4] == 0x11 || data[4] == 0x12 ||
+ data[4] == 0x30 || data[4] == 0x44) &&
+ data[5] == 0xaf &&
+ ((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
+ }
+ return;
+ }
+ data = gst_type_find_peek (tf, 0, 6);
+ if (data) {
+ /* check magic only */
+ if ((data[4] == 0x11 || data[4] == 0x12 ||
+ data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
+ }
+ return;
+ }
+}
+
+/*** application/x-id3 ***/
+
+static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
+
+#define ID3_CAPS gst_static_caps_get(&id3_caps)
+static void
+id3v2_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 10);
+
+ if (data && memcmp (data, "ID3", 3) == 0 &&
+ data[3] != 0xFF && data[4] != 0xFF &&
+ (data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
+ (data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
+ }
+}
+
+static void
+id3v1_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, -128, 3);
+
+ if (data && memcmp (data, "TAG", 3) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
+ }
+}
+
+/*** application/x-ape ***/
+
+static GstStaticCaps apetag_caps = GST_STATIC_CAPS ("application/x-apetag");
+
+#define APETAG_CAPS gst_static_caps_get(&apetag_caps)
+static void
+apetag_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data;
+
+ /* APEv1/2 at start of file */
+ data = gst_type_find_peek (tf, 0, 8);
+ if (data && !memcmp (data, "APETAGEX", 8)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
+ return;
+ }
+
+ /* APEv1/2 at end of file */
+ data = gst_type_find_peek (tf, -32, 8);
+ if (data && !memcmp (data, "APETAGEX", 8)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
+ return;
+ }
+}
+
+/*** audio/x-ttafile ***/
+
+static GstStaticCaps tta_caps = GST_STATIC_CAPS ("audio/x-ttafile");
+
+#define TTA_CAPS gst_static_caps_get(&tta_caps)
+static void
+tta_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 3);
+
+ if (data) {
+ if (memcmp (data, "TTA", 3) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TTA_CAPS);
+ return;
+ }
+ }
+}
+
+/*** audio/x-flac ***/
+static GstStaticCaps flac_caps = GST_STATIC_CAPS ("audio/x-flac");
+
+#define FLAC_CAPS (gst_static_caps_get(&flac_caps))
+
+static void
+flac_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
+ return;
+
+ /* standard flac (also old/broken flac-in-ogg with an initial 4-byte marker
+ * packet and without the usual packet framing) */
+ if (memcmp (c.data, "fLaC", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
+ return;
+ }
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
+ return;
+
+ /* flac-in-ogg, see http://flac.sourceforge.net/ogg_mapping.html */
+ if (memcmp (c.data, "\177FLAC\001", 6) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
+ return;
+ }
+
+/* disabled because it happily typefinds /dev/urandom as audio/x-flac, and
+ * because I yet have to see header-less flac in the wild */
+#if 0
+ /* flac without headers (subset format) */
+ /* 64K should be enough */
+ while (c.offset < (64 * 1024)) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
+ break;
+
+ /* look for frame header,
+ * http://flac.sourceforge.net/format.html#frame_header
+ */
+ if (c.data[0] == 0xff && (c.data[1] >> 2) == 0x3e) {
+ /* bit 15 in the header must be 0 */
+ if (((c.data[1] >> 1) & 0x01) == 0x01)
+ goto advance;
+
+ /* blocksize must be != 0x00 */
+ if ((c.data[2] >> 4) == 0x00)
+ goto advance;
+
+ /* samplerate must be != 0x0f */
+ if ((c.data[2] & 0x0f) == 0x0f)
+ goto advance;
+ /* also 0 is invalid, as it means get the info from the header and we
+ * don't have headers if we are here */
+ if ((c.data[2] & 0x0f) == 0x00)
+ goto advance;
+
+ /* channel assignment must be < 11 */
+ if ((c.data[3] >> 4) >= 11)
+ goto advance;
+
+ /* sample size must be != 0x07 and != 0x05 */
+ if (((c.data[3] >> 1) & 0x07) == 0x07)
+ goto advance;
+ if (((c.data[3] >> 1) & 0x07) == 0x05)
+ goto advance;
+ /* also 0 is invalid, as it means get the info from the header and we
+ * don't have headers if we are here */
+ if (((c.data[3] >> 1) & 0x07) == 0x00)
+ goto advance;
+
+ /* next bit must be 0 */
+ if ((c.data[3] & 0x01) == 0x01)
+ goto advance;
+
+ /* FIXME: shouldn't we include the crc check ? */
+
+ GST_DEBUG ("Found flac without headers at %d", (gint) c.offset);
+ gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, FLAC_CAPS);
+ return;
+ }
+ advance:
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+#endif
+}
+
+/*** audio/mpeg version 2, 4 ***/
+
+static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
+ "mpegversion = (int) { 2, 4 }, framed = (bool) false");
+#define AAC_CAPS (gst_static_caps_get(&aac_caps))
+#define AAC_AMOUNT (4096)
+static void
+aac_type_find (GstTypeFind * tf, gpointer unused)
+{
+ /* LUT to convert the AudioObjectType from the ADTS header to a string */
+ DataScanCtx c = { 0, NULL, 0 };
+
+ while (c.offset < AAC_AMOUNT) {
+ guint snc, len;
+
+ /* detect adts header or adif header.
+ * The ADIF header is 4 bytes, that should be OK. The ADTS header, on
+ * the other hand, is 14 bits only, so we require one valid frame with
+ * again a valid syncpoint on the next one (28 bits) for certainty. We
+ * require 4 kB, which is quite a lot, since frames are generally 200-400
+ * bytes.
+ * LOAS has 2 possible syncwords, which are 11 bits and 16 bits long.
+ * The following stream syntax depends on which one is found.
+ */
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
+ break;
+
+ snc = GST_READ_UINT16_BE (c.data);
+ if (G_UNLIKELY ((snc & 0xfff6) == 0xfff0)) {
+ /* ADTS header - find frame length */
+ GST_DEBUG ("Found one ADTS syncpoint at offset 0x%" G_GINT64_MODIFIER
+ "x, tracing next...", c.offset);
+ len = ((c.data[3] & 0x03) << 11) |
+ (c.data[4] << 3) | ((c.data[5] & 0xe0) >> 5);
+
+ if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
+ GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
+ goto next;
+ }
+
+ /* check if there's a second ADTS frame */
+ snc = GST_READ_UINT16_BE (c.data + len);
+ if ((snc & 0xfff6) == 0xfff0) {
+ GstCaps *caps;
+ guint mpegversion, sample_freq_idx, channel_config, profile_idx, rate;
+ guint8 audio_config[2];
+
+ mpegversion = (c.data[1] & 0x08) ? 2 : 4;
+ profile_idx = c.data[2] >> 6;
+ sample_freq_idx = ((c.data[2] & 0x3c) >> 2);
+ channel_config = ((c.data[2] & 0x01) << 2) + (c.data[3] >> 6);
+
+ GST_DEBUG ("Found second ADTS-%d syncpoint at offset 0x%"
+ G_GINT64_MODIFIER "x, framelen %u", mpegversion, c.offset, len);
+
+ /* 0xd and 0xe are reserved. 0xf means the sample frequency is directly
+ * specified in the header, but that's not allowed for ADTS */
+ if (sample_freq_idx > 0xc) {
+ GST_DEBUG ("Unexpected sample frequency index %d or wrong sync",
+ sample_freq_idx);
+ goto next;
+ }
+
+ rate = gst_codec_utils_aac_get_sample_rate_from_index (sample_freq_idx);
+ GST_LOG ("ADTS: profile=%u, rate=%u", profile_idx, rate);
+
+ /* The ADTS frame header is slightly different from the
+ * AudioSpecificConfig defined for the MPEG-4 container, so we just
+ * construct enough of it for getting the level here. */
+ /* ADTS counts profiles from 0 instead of 1 to save bits */
+ audio_config[0] = (profile_idx + 1) << 3;
+ audio_config[0] |= (sample_freq_idx >> 1) & 0x7;
+ audio_config[1] = (sample_freq_idx & 0x1) << 7;
+ audio_config[1] |= (channel_config & 0xf) << 3;
+
+ caps = gst_caps_new_simple ("audio/mpeg",
+ "framed", G_TYPE_BOOLEAN, FALSE,
+ "mpegversion", G_TYPE_INT, mpegversion,
+ "stream-format", G_TYPE_STRING, "adts", NULL);
+
+ gst_codec_utils_aac_caps_set_level_and_profile (caps, audio_config, 2);
+
+ /* add rate and number of channels if we can */
+ if (channel_config != 0 && channel_config <= 7) {
+ const guint channels_map[] = { 0, 1, 2, 3, 4, 5, 6, 8 };
+
+ gst_caps_set_simple (caps, "channels", G_TYPE_INT,
+ channels_map[channel_config], "rate", G_TYPE_INT, rate, NULL);
+ }
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
+ gst_caps_unref (caps);
+ break;
+ }
+
+ GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
+ } else if (G_UNLIKELY (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1))) {
+ /* LOAS frame */
+
+ GST_DEBUG ("Found one LOAS syncword at offset 0x%" G_GINT64_MODIFIER
+ "x, tracing next...", c.offset);
+
+ /* check length of frame for each type of detectable LOAS streams */
+ if (snc == 0x4de1) {
+ /* EPAudioSyncStream */
+ len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
+ ((c.data[4] & 0x80) >> 7);
+ /* add size of EP sync stream header */
+ len += 7;
+ } else {
+ /* AudioSyncStream */
+ len = ((c.data[1] & 0x1f) << 8) | c.data[2];
+ /* add size of sync stream header */
+ len += 3;
+ }
+
+ if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
+ GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
+ goto next;
+ }
+
+ /* check if there's a second LOAS frame */
+ snc = GST_READ_UINT16_BE (c.data + len);
+ if (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1)) {
+ GST_DEBUG ("Found second LOAS syncword at offset 0x%"
+ G_GINT64_MODIFIER "x, framelen %u", c.offset, len);
+
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
+ "framed", G_TYPE_BOOLEAN, FALSE,
+ "mpegversion", G_TYPE_INT, 4,
+ "stream-format", G_TYPE_STRING, "loas", NULL);
+ break;
+ }
+
+ GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
+ } else if (!memcmp (c.data, "ADIF", 4)) {
+ /* ADIF header */
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
+ "framed", G_TYPE_BOOLEAN, FALSE, "mpegversion", G_TYPE_INT, 4,
+ "stream-format", G_TYPE_STRING, "adif", NULL);
+ break;
+ }
+
+ next:
+
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+}
+
+/*** audio/mpeg version 1 ***/
+
+/*
+ * The chance that random data is identified as a valid mp3 header is 63 / 2^18
+ * (0.024%) per try. This makes the function for calculating false positives
+ * 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
+ * This has the following probabilities of false positives:
+ * datasize MIN_HEADERS
+ * (bytes) 1 2 3 4
+ * 4096 62.6% 0.02% 0% 0%
+ * 16384 98% 0.09% 0% 0%
+ * 1 MiB 100% 5.88% 0% 0%
+ * 1 GiB 100% 100% 1.44% 0%
+ * 1 TiB 100% 100% 100% 0.35%
+ * This means that the current choice (3 headers by most of the time 4096 byte
+ * buffers is pretty safe for now.
+ *
+ * The max. size of each frame is 1440 bytes, which means that for N frames to
+ * be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
+ * Assuming we step into the stream right after the frame header, this
+ * means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
+ * of data (5762) to always detect any mp3.
+ */
+
+static const guint mp3types_bitrates[2][3][16] =
+ { {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
+ {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
+ {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
+{{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
+ {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
+ {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
+};
+
+static const guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
+{22050, 24000, 16000},
+{44100, 48000, 32000}
+};
+
+static inline guint
+mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
+ guint * put_channels, guint * put_bitrate, guint * put_samplerate,
+ gboolean * may_be_free_format, gint possible_free_framelen)
+{
+ guint bitrate, layer, length, mode, samplerate, version, channels;
+
+ if ((header & 0xffe00000) != 0xffe00000)
+ return 0;
+
+ /* we don't need extension, copyright, original or
+ * emphasis for the frame length */
+ header >>= 6;
+
+ /* mode */
+ mode = header & 0x3;
+ header >>= 3;
+
+ /* padding */
+ length = header & 0x1;
+ header >>= 1;
+
+ /* sampling frequency */
+ samplerate = header & 0x3;
+ if (samplerate == 3)
+ return 0;
+ header >>= 2;
+
+ /* bitrate index */
+ bitrate = header & 0xF;
+ if (bitrate == 0 && possible_free_framelen == -1) {
+ GST_LOG ("Possibly a free format mp3 - signalling");
+ *may_be_free_format = TRUE;
+ }
+ if (bitrate == 15 || (bitrate == 0 && possible_free_framelen == -1))
+ return 0;
+
+ /* ignore error correction, too */
+ header >>= 5;
+
+ /* layer */
+ layer = 4 - (header & 0x3);
+ if (layer == 4)
+ return 0;
+ header >>= 2;
+
+ /* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
+ version = header & 0x3;
+ if (version == 1)
+ return 0;
+
+ /* lookup */
+ channels = (mode == 3) ? 1 : 2;
+ samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
+ if (bitrate == 0) {
+ if (layer == 1) {
+ length *= 4;
+ length += possible_free_framelen;
+ bitrate = length * samplerate / 48000;
+ } else {
+ length += possible_free_framelen;
+ bitrate = length * samplerate /
+ ((layer == 3 && version != 3) ? 72000 : 144000);
+ }
+ } else {
+ /* calculating */
+ bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
+ if (layer == 1) {
+ length = ((12000 * bitrate / samplerate) + length) * 4;
+ } else {
+ length += ((layer == 3
+ && version != 3) ? 72000 : 144000) * bitrate / samplerate;
+ }
+ }
+
+ GST_LOG ("mp3typefind: calculated mp3 frame length of %u bytes", length);
+ GST_LOG
+ ("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
+ " - channels = %u", samplerate, bitrate, layer, version, channels);
+
+ if (put_layer)
+ *put_layer = layer;
+ if (put_channels)
+ *put_channels = channels;
+ if (put_bitrate)
+ *put_bitrate = bitrate;
+ if (put_samplerate)
+ *put_samplerate = samplerate;
+
+ return length;
+}
+
+
+static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
+ "mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
+#define MP3_CAPS (gst_static_caps_get(&mp3_caps))
+/*
+ * random values for typefinding
+ * if no more data is available, we will return a probability of
+ * (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
+ * / TRY_SYNC)
+ * if found_headers >= MIN_HEADERS
+ */
+#define GST_MP3_TYPEFIND_MIN_HEADERS (2)
+#define GST_MP3_TYPEFIND_TRY_HEADERS (5)
+#define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
+#define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
+#define GST_MP3_WRONG_HEADER (10)
+
+static void
+mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
+ guint * found_layer, GstTypeFindProbability * found_prob)
+{
+ guint8 *data = NULL;
+ guint8 *data_end = NULL;
+ guint size;
+ guint64 skipped;
+ gint last_free_offset = -1;
+ gint last_free_framelen = -1;
+ gboolean headerstart = TRUE;
+
+ *found_layer = 0;
+ *found_prob = 0;
+
+ size = 0;
+ skipped = 0;
+ while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
+ if (size <= 0) {
+ size = GST_MP3_TYPEFIND_SYNC_SIZE * 2;
+ do {
+ size /= 2;
+ data = gst_type_find_peek (tf, skipped + start_off, size);
+ } while (size > 10 && !data);
+ if (!data)
+ break;
+ data_end = data + size;
+ }
+ if (*data == 0xFF) {
+ guint8 *head_data = NULL;
+ guint layer = 0, bitrate, samplerate, channels;
+ guint found = 0; /* number of valid headers found */
+ guint64 offset = skipped;
+
+ while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
+ guint32 head;
+ guint length;
+ guint prev_layer = 0;
+ guint prev_channels = 0, prev_samplerate = 0;
+ gboolean free = FALSE;
+
+ if ((gint64) (offset - skipped + 4) >= 0 &&
+ data + offset - skipped + 4 < data_end) {
+ head_data = data + offset - skipped;
+ } else {
+ head_data = gst_type_find_peek (tf, offset + start_off, 4);
+ }
+ if (!head_data)
+ break;
+ head = GST_READ_UINT32_BE (head_data);
+ if (!(length = mp3_type_frame_length_from_header (head, &layer,
+ &channels, &bitrate, &samplerate, &free,
+ last_free_framelen))) {
+ if (free) {
+ if (last_free_offset == -1)
+ last_free_offset = offset;
+ else {
+ last_free_framelen = offset - last_free_offset;
+ offset = last_free_offset;
+ continue;
+ }
+ } else {
+ last_free_framelen = -1;
+ }
+
+ /* Mark the fact that we didn't find a valid header at the beginning */
+ if (found == 0)
+ headerstart = FALSE;
+
+ GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
+ " (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
+ "(possibly-free: %s)", found + 1, start_off + offset,
+ start_off + offset, free ? "yes" : "no");
+ break;
+ }
+ if ((prev_layer && prev_layer != layer) ||
+ /* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
+ (prev_samplerate && prev_samplerate != samplerate) ||
+ (prev_channels && prev_channels != channels)) {
+ /* this means an invalid property, or a change, which might mean
+ * that this is not a mp3 but just a random bytestream. It could
+ * be a freaking funky encoded mp3 though. We'll just not count
+ * this header*/
+ prev_layer = layer;
+ prev_channels = channels;
+ prev_samplerate = samplerate;
+ } else {
+ found++;
+ GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
+ G_GINT64_MODIFIER "X)", found, start_off + offset,
+ start_off + offset);
+ }
+ offset += length;
+ }
+ g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
+ if (head_data == NULL &&
+ gst_type_find_peek (tf, offset + start_off - 1, 1) == NULL)
+ /* Incomplete last frame - don't count it. */
+ found--;
+ if (found == GST_MP3_TYPEFIND_TRY_HEADERS ||
+ (found >= GST_MP3_TYPEFIND_MIN_HEADERS && head_data == NULL)) {
+ /* we can make a valid guess */
+ guint probability = found * GST_TYPE_FIND_MAXIMUM *
+ (GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
+ GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
+
+ if (!headerstart
+ && probability > (GST_TYPE_FIND_MINIMUM + GST_MP3_WRONG_HEADER))
+ probability -= GST_MP3_WRONG_HEADER;
+ if (probability < GST_TYPE_FIND_MINIMUM)
+ probability = GST_TYPE_FIND_MINIMUM;
+ if (start_off > 0)
+ probability /= 2;
+
+ GST_INFO
+ ("audio/mpeg calculated %u = %u * %u / %u * (%u - %"
+ G_GUINT64_FORMAT ") / %u", probability, GST_TYPE_FIND_MAXIMUM,
+ found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC,
+ (guint64) skipped, GST_MP3_TYPEFIND_TRY_SYNC);
+ /* make sure we're not id3 tagged */
+ head_data = gst_type_find_peek (tf, -128, 3);
+ if (head_data && (memcmp (head_data, "TAG", 3) == 0)) {
+ probability = 0;
+ }
+ g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
+
+ *found_prob = probability;
+ if (probability > 0)
+ *found_layer = layer;
+ return;
+ }
+ }
+ data++;
+ skipped++;
+ size--;
+ }
+}
+
+static void
+mp3_type_find (GstTypeFind * tf, gpointer unused)
+{
+ GstTypeFindProbability prob, mid_prob;
+ guint8 *data;
+ guint layer, mid_layer;
+ guint64 length;
+
+ mp3_type_find_at_offset (tf, 0, &layer, &prob);
+ length = gst_type_find_get_length (tf);
+
+ if (length == 0 || length == (guint64) - 1) {
+ if (prob != 0)
+ goto suggest;
+ return;
+ }
+
+ /* if we're pretty certain already, skip the additional check */
+ if (prob >= GST_TYPE_FIND_LIKELY)
+ goto suggest;
+
+ mp3_type_find_at_offset (tf, length / 2, &mid_layer, &mid_prob);
+
+ if (mid_prob > 0) {
+ if (prob == 0) {
+ GST_LOG ("detected audio/mpeg only in the middle (p=%u)", mid_prob);
+ layer = mid_layer;
+ prob = mid_prob;
+ goto suggest;
+ }
+
+ if (layer != mid_layer) {
+ GST_WARNING ("audio/mpeg layer discrepancy: %u vs. %u", layer, mid_layer);
+ return; /* FIXME: or should we just go with the one in the middle? */
+ }
+
+ /* detected mpeg audio both in middle of the file and at the start */
+ prob = (prob + mid_prob) / 2;
+ goto suggest;
+ }
+
+ /* let's see if there's a valid header right at the start */
+ data = gst_type_find_peek (tf, 0, 4); /* use min. frame size? */
+ if (data && mp3_type_frame_length_from_header (GST_READ_UINT32_BE (data),
+ &layer, NULL, NULL, NULL, NULL, 0) != 0) {
+ if (prob == 0)
+ prob = GST_TYPE_FIND_POSSIBLE - 10;
+ else
+ prob = MAX (GST_TYPE_FIND_POSSIBLE - 10, prob + 10);
+ }
+
+ if (prob > 0)
+ goto suggest;
+
+ return;
+
+suggest:
+ {
+ g_return_if_fail (layer >= 1 && layer <= 3);
+
+ gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
+ "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
+ }
+}
+
+/*** audio/x-musepack ***/
+
+static GstStaticCaps musepack_caps =
+GST_STATIC_CAPS ("audio/x-musepack, streamversion= (int) { 7, 8 }");
+
+#define MUSEPACK_CAPS (gst_static_caps_get(&musepack_caps))
+static void
+musepack_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+ GstTypeFindProbability prop = GST_TYPE_FIND_MINIMUM;
+ gint streamversion = -1;
+
+ if (data && memcmp (data, "MP+", 3) == 0) {
+ streamversion = 7;
+ if ((data[3] & 0x7f) == 7) {
+ prop = GST_TYPE_FIND_MAXIMUM;
+ } else {
+ prop = GST_TYPE_FIND_LIKELY + 10;
+ }
+ } else if (data && memcmp (data, "MPCK", 4) == 0) {
+ streamversion = 8;
+ prop = GST_TYPE_FIND_MAXIMUM;
+ }
+
+ if (streamversion != -1) {
+ gst_type_find_suggest_simple (tf, prop, "audio/x-musepack",
+ "streamversion", G_TYPE_INT, streamversion, NULL);
+ }
+}
+
+/*** audio/x-ac3 ***/
+/* FIXME 0.11: should be audio/ac3, but isn't for backwards compatibility */
+static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3");
+
+#define AC3_CAPS (gst_static_caps_get(&ac3_caps))
+
+static GstStaticCaps eac3_caps = GST_STATIC_CAPS ("audio/x-eac3");
+
+#define EAC3_CAPS (gst_static_caps_get(&eac3_caps))
+
+struct ac3_frmsize
+{
+ unsigned short bit_rate;
+ unsigned short frm_size[3];
+};
+
+static const struct ac3_frmsize ac3_frmsizecod_tbl[] = {
+ {32, {64, 69, 96}},
+ {32, {64, 70, 96}},
+ {40, {80, 87, 120}},
+ {40, {80, 88, 120}},
+ {48, {96, 104, 144}},
+ {48, {96, 105, 144}},
+ {56, {112, 121, 168}},
+ {56, {112, 122, 168}},
+ {64, {128, 139, 192}},
+ {64, {128, 140, 192}},
+ {80, {160, 174, 240}},
+ {80, {160, 175, 240}},
+ {96, {192, 208, 288}},
+ {96, {192, 209, 288}},
+ {112, {224, 243, 336}},
+ {112, {224, 244, 336}},
+ {128, {256, 278, 384}},
+ {128, {256, 279, 384}},
+ {160, {320, 348, 480}},
+ {160, {320, 349, 480}},
+ {192, {384, 417, 576}},
+ {192, {384, 418, 576}},
+ {224, {448, 487, 672}},
+ {224, {448, 488, 672}},
+ {256, {512, 557, 768}},
+ {256, {512, 558, 768}},
+ {320, {640, 696, 960}},
+ {320, {640, 697, 960}},
+ {384, {768, 835, 1152}},
+ {384, {768, 836, 1152}},
+ {448, {896, 975, 1344}},
+ {448, {896, 976, 1344}},
+ {512, {1024, 1114, 1536}},
+ {512, {1024, 1115, 1536}},
+ {576, {1152, 1253, 1728}},
+ {576, {1152, 1254, 1728}},
+ {640, {1280, 1393, 1920}},
+ {640, {1280, 1394, 1920}}
+};
+
+static void
+ac3_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+
+ /* Search for an ac3 frame; not neccesarily right at the start, but give it
+ * a lower probability if not found right at the start. Check that the
+ * frame is followed by a second frame at the expected offset.
+ * We could also check the two ac3 CRCs, but we don't do that right now */
+ while (c.offset < 1024) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 5)))
+ break;
+
+ if (c.data[0] == 0x0b && c.data[1] == 0x77) {
+ guint bsid = c.data[5] >> 3;
+
+ if (bsid <= 8) {
+ /* ac3 */
+ guint fscod = c.data[4] >> 6;
+ guint frmsizecod = c.data[4] & 0x3f;
+
+ if (fscod < 3 && frmsizecod < 38) {
+ DataScanCtx c_next = c;
+ guint frame_size;
+
+ frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod];
+ GST_LOG ("possible AC3 frame sync at offset %"
+ G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
+ if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
+ data_scan_ctx_advance (tf, &c_next, frame_size * 2);
+
+ if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
+ fscod = c_next.data[4] >> 6;
+ frmsizecod = c_next.data[4] & 0x3f;
+
+ if (fscod < 3 && frmsizecod < 38) {
+ GstTypeFindProbability prob;
+
+ GST_LOG ("found second AC3 frame (size=%u), looks good",
+ ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]);
+ if (c.offset == 0)
+ prob = GST_TYPE_FIND_MAXIMUM;
+ else
+ prob = GST_TYPE_FIND_NEARLY_CERTAIN;
+
+ gst_type_find_suggest (tf, prob, AC3_CAPS);
+ return;
+ }
+ } else {
+ GST_LOG ("no second AC3 frame found, false sync");
+ }
+ }
+ }
+ } else if (bsid <= 16 && bsid > 10) {
+ /* eac3 */
+ DataScanCtx c_next = c;
+ guint frame_size;
+
+ frame_size = (((c.data[2] & 0x07) << 8) + c.data[3]) + 1;
+ GST_LOG ("possible E-AC3 frame sync at offset %"
+ G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
+ if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
+ data_scan_ctx_advance (tf, &c_next, frame_size * 2);
+
+ if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
+ GstTypeFindProbability prob;
+
+ GST_LOG ("found second E-AC3 frame, looks good");
+ if (c.offset == 0)
+ prob = GST_TYPE_FIND_MAXIMUM;
+ else
+ prob = GST_TYPE_FIND_NEARLY_CERTAIN;
+
+ gst_type_find_suggest (tf, prob, EAC3_CAPS);
+ return;
+ } else {
+ GST_LOG ("no second E-AC3 frame found, false sync");
+ }
+ }
+ } else {
+ GST_LOG ("invalid AC3 BSID: %u", bsid);
+ }
+ }
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+}
+
+/*** audio/x-dts ***/
+static GstStaticCaps dts_caps = GST_STATIC_CAPS ("audio/x-dts");
+#define DTS_CAPS (gst_static_caps_get (&dts_caps))
+#define DTS_MIN_FRAMESIZE 96
+#define DTS_MAX_FRAMESIZE 18725 /* 16384*16/14 */
+
+static gboolean
+dts_parse_frame_header (DataScanCtx * c, guint * frame_size,
+ guint * sample_rate, guint * channels, guint * depth, guint * endianness)
+{
+ static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025,
+ 22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000
+ };
+ static const guint8 channels_table[16] = { 1, 2, 2, 2, 2, 3, 3, 4, 4, 5,
+ 6, 6, 6, 7, 8, 8
+ };
+ guint16 hdr[8];
+ guint32 marker;
+ guint num_blocks, chans, lfe, i;
+
+ marker = GST_READ_UINT32_BE (c->data);
+
+ /* raw big endian or 14-bit big endian */
+ if (marker == 0x7FFE8001 || marker == 0x1FFFE800) {
+ *endianness = G_BIG_ENDIAN;
+ for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
+ hdr[i] = GST_READ_UINT16_BE (c->data + (i * sizeof (guint16)));
+ } else
+ /* raw little endian or 14-bit little endian */
+ if (marker == 0xFE7F0180 || marker == 0xFF1F00E8) {
+ *endianness = G_LITTLE_ENDIAN;
+ for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
+ hdr[i] = GST_READ_UINT16_LE (c->data + (i * sizeof (guint16)));
+ } else {
+ return FALSE;
+ }
+
+ GST_LOG ("dts sync marker 0x%08x at offset %u", marker, (guint) c->offset);
+
+ /* 14-bit mode */
+ if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) {
+ if ((hdr[2] & 0xFFF0) != 0x07F0)
+ return FALSE;
+ /* discard top 2 bits (2 void), shift in 2 */
+ hdr[0] = (hdr[0] << 2) | ((hdr[1] >> 12) & 0x0003);
+ /* discard top 4 bits (2 void, 2 shifted into hdr[0]), shift in 4 etc. */
+ hdr[1] = (hdr[1] << 4) | ((hdr[2] >> 10) & 0x000F);
+ hdr[2] = (hdr[2] << 6) | ((hdr[3] >> 8) & 0x003F);
+ hdr[3] = (hdr[3] << 8) | ((hdr[4] >> 6) & 0x00FF);
+ hdr[4] = (hdr[4] << 10) | ((hdr[5] >> 4) & 0x03FF);
+ hdr[5] = (hdr[5] << 12) | ((hdr[6] >> 2) & 0x0FFF);
+ hdr[6] = (hdr[6] << 14) | ((hdr[7] >> 0) & 0x3FFF);
+ g_assert (hdr[0] == 0x7FFE && hdr[1] == 0x8001);
+ *depth = 14;
+ } else {
+ *depth = 16;
+ }
+
+ GST_LOG ("frame header: %04x%04x%04x%04x", hdr[2], hdr[3], hdr[4], hdr[5]);
+
+ num_blocks = (hdr[2] >> 2) & 0x7F;
+ *frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1;
+ chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14);
+ *sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F];
+ lfe = (hdr[5] >> 9) & 0x03;
+
+ if (num_blocks < 5 || *frame_size < 96 || *sample_rate == 0)
+ return FALSE;
+
+ if (marker == 0x1FFFE800 || marker == 0xFF1F00E8)
+ *frame_size = (*frame_size * 16) / 14; /* FIXME: round up? */
+
+ if (chans < G_N_ELEMENTS (channels_table))
+ *channels = channels_table[chans] + ((lfe) ? 1 : 0);
+ else
+ *channels = 0;
+
+ return TRUE;
+}
+
+static void
+dts_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+
+ /* Search for an dts frame; not neccesarily right at the start, but give it
+ * a lower probability if not found right at the start. Check that the
+ * frame is followed by a second frame at the expected offset. */
+ while (c.offset <= DTS_MAX_FRAMESIZE) {
+ guint frame_size = 0, rate = 0, chans = 0, depth = 0, endianness = 0;
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, DTS_MIN_FRAMESIZE)))
+ return;
+
+ if (G_UNLIKELY (dts_parse_frame_header (&c, &frame_size, &rate, &chans,
+ &depth, &endianness))) {
+ GstTypeFindProbability prob;
+ DataScanCtx next_c;
+
+ prob = (c.offset == 0) ? GST_TYPE_FIND_LIKELY : GST_TYPE_FIND_POSSIBLE;
+
+ /* check for second frame sync */
+ next_c = c;
+ data_scan_ctx_advance (tf, &next_c, frame_size);
+ if (data_scan_ctx_ensure_data (tf, &next_c, 4)) {
+ GST_LOG ("frame size: %u 0x%04x", frame_size, frame_size);
+ GST_MEMDUMP ("second frame sync", next_c.data, 4);
+ if (GST_READ_UINT32_BE (c.data) == GST_READ_UINT32_BE (next_c.data))
+ prob = GST_TYPE_FIND_MAXIMUM;
+ }
+
+ if (chans > 0) {
+ gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
+ "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans,
+ "depth", G_TYPE_INT, depth, "endianness", G_TYPE_INT, endianness,
+ "framed", G_TYPE_BOOLEAN, FALSE, NULL);
+ } else {
+ gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
+ "rate", G_TYPE_INT, rate, "depth", G_TYPE_INT, depth,
+ "endianness", G_TYPE_INT, endianness,
+ "framed", G_TYPE_BOOLEAN, FALSE, NULL);
+ }
+
+ return;
+ }
+
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+}
+
+/*** gsm ***/
+
+/* can only be detected by using the extension, in which case we use the default
+ * GSM properties */
+static GstStaticCaps gsm_caps =
+GST_STATIC_CAPS ("audio/x-gsm, rate=8000, channels=1");
+
+#define GSM_CAPS (gst_static_caps_get(&gsm_caps))
+
+/*** wavpack ***/
+
+static GstStaticCaps wavpack_caps =
+GST_STATIC_CAPS ("audio/x-wavpack, framed = (boolean) false");
+
+#define WAVPACK_CAPS (gst_static_caps_get(&wavpack_caps))
+
+static GstStaticCaps wavpack_correction_caps =
+GST_STATIC_CAPS ("audio/x-wavpack-correction, framed = (boolean) false");
+
+#define WAVPACK_CORRECTION_CAPS (gst_static_caps_get(&wavpack_correction_caps))
+
+static void
+wavpack_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint64 offset;
+ guint32 blocksize;
+ guint8 *data;
+
+ data = gst_type_find_peek (tf, 0, 32);
+ if (!data)
+ return;
+
+ if (data[0] != 'w' || data[1] != 'v' || data[2] != 'p' || data[3] != 'k')
+ return;
+
+ /* Note: wavpack blocks can be fairly large (easily 60-110k), possibly
+ * larger than the max. limits imposed by certain typefinding elements
+ * like id3demux or apedemux, so typefinding is most likely only going to
+ * work in pull-mode */
+ blocksize = GST_READ_UINT32_LE (data + 4);
+ GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
+ offset = 32;
+ while (offset < 32 + blocksize) {
+ guint32 sublen;
+
+ /* get chunk header */
+ GST_LOG ("peeking at chunk at offset 0x%04x", (guint) offset);
+ data = gst_type_find_peek (tf, offset, 4);
+ if (data == NULL)
+ break;
+ sublen = ((guint32) data[1]) << 1;
+ if (data[0] & 0x80) {
+ sublen |= (((guint32) data[2]) << 9) | (((guint32) data[3]) << 17);
+ sublen += 1 + 3; /* id + length */
+ } else {
+ sublen += 1 + 1; /* id + length */
+ }
+ if (sublen > blocksize - offset + 32) {
+ GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
+ blocksize - offset);
+ break;
+ }
+ if ((data[0] & 0x20) == 0) {
+ switch (data[0] & 0x0f) {
+ case 0xa: /* ID_WV_BITSTREAM */
+ case 0xc: /* ID_WVX_BITSTREAM */
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
+ return;
+ case 0xb: /* ID_WVC_BITSTREAM */
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
+ WAVPACK_CORRECTION_CAPS);
+ return;
+ default:
+ break;
+ }
+ }
+ offset += sublen;
+ }
+}
+
+/*** application/postscrip ***/
+static GstStaticCaps postscript_caps =
+GST_STATIC_CAPS ("application/postscript");
+
+#define POSTSCRIPT_CAPS (gst_static_caps_get(&postscript_caps))
+
+static void
+postscript_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 3);
+ if (!data)
+ return;
+
+ if (data[0] == 0x04)
+ data++;
+ if (data[0] == '%' && data[1] == '!')
+ gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, POSTSCRIPT_CAPS);
+
+}
+
+/*** image/svg+xml ***/
+static GstStaticCaps svg_caps = GST_STATIC_CAPS ("image/svg+xml");
+
+#define SVG_CAPS (gst_static_caps_get(&svg_caps))
+
+static void
+svg_type_find (GstTypeFind * tf, gpointer unused)
+{
+ static const gchar svg_doctype[] = "!DOCTYPE svg";
+ static const gchar svg_tag[] = "<svg";
+ DataScanCtx c = { 0, NULL, 0 };
+
+ while (c.offset <= 1024) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 12)))
+ break;
+
+ if (memcmp (svg_doctype, c.data, 12) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVG_CAPS);
+ return;
+ } else if (memcmp (svg_tag, c.data, 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, SVG_CAPS);
+ return;
+ }
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+}
+
+/*** multipart/x-mixed-replace mimestream ***/
+
+static GstStaticCaps multipart_caps =
+GST_STATIC_CAPS ("multipart/x-mixed-replace");
+#define MULTIPART_CAPS gst_static_caps_get(&multipart_caps)
+
+/* multipart/x-mixed replace is:
+ * <maybe some whitespace>--<some ascii chars>[\r]\n
+ * <more ascii chars>[\r]\nContent-type:<more ascii>[\r]\n */
+static void
+multipart_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data;
+ guint8 *x;
+
+#define MULTIPART_MAX_BOUNDARY_OFFSET 16
+ data = gst_type_find_peek (tf, 0, MULTIPART_MAX_BOUNDARY_OFFSET);
+ if (!data)
+ return;
+
+ for (x = data;
+ x - data < MULTIPART_MAX_BOUNDARY_OFFSET - 2 && g_ascii_isspace (*x);
+ x++);
+ if (x[0] != '-' || x[1] != '-')
+ return;
+
+ /* Could be okay, peek what should be enough for a complete header */
+#define MULTIPART_MAX_HEADER_SIZE 256
+ data = gst_type_find_peek (tf, 0, MULTIPART_MAX_HEADER_SIZE);
+ if (!data)
+ return;
+
+ for (x = data; x - data < MULTIPART_MAX_HEADER_SIZE - 14; x++) {
+ if (!isascii (*x)) {
+ return;
+ }
+ if (*x == '\n' &&
+ !g_ascii_strncasecmp ("content-type:", (gchar *) x + 1, 13)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MULTIPART_CAPS);
+ return;
+ }
+ }
+}
+
+/*** video/mpeg systemstream ***/
+static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
+ "systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
+
+#define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
+#define IS_MPEG_HEADER(data) (G_UNLIKELY((((guint8 *)(data))[0] == 0x00) && \
+ (((guint8 *)(data))[1] == 0x00) && \
+ (((guint8 *)(data))[2] == 0x01)))
+
+#define IS_MPEG_PACK_CODE(b) ((b) == 0xBA)
+#define IS_MPEG_SYS_CODE(b) ((b) == 0xBB)
+#define IS_MPEG_PACK_HEADER(data) (IS_MPEG_HEADER (data) && \
+ IS_MPEG_PACK_CODE (((guint8 *)(data))[3]))
+
+#define IS_MPEG_PES_CODE(b) (((b) & 0xF0) == 0xE0 || ((b) & 0xF0) == 0xC0 || \
+ (b) >= 0xBD)
+#define IS_MPEG_PES_HEADER(data) (IS_MPEG_HEADER (data) && \
+ IS_MPEG_PES_CODE (((guint8 *)(data))[3]))
+
+#define MPEG2_MAX_PROBE_LENGTH (128 * 1024) /* 128kB should be 64 packs of the
+ * most common 2kB pack size. */
+
+#define MPEG2_MIN_SYS_HEADERS 2
+#define MPEG2_MAX_SYS_HEADERS 5
+
+static gboolean
+mpeg_sys_is_valid_pack (GstTypeFind * tf, const guint8 * data, guint len,
+ guint * pack_size)
+{
+ /* Check the pack header @ offset for validity, assuming that the 4 byte header
+ * itself has already been checked. */
+ guint8 stuff_len;
+
+ if (len < 12)
+ return FALSE;
+
+ /* Check marker bits */
+ if ((data[4] & 0xC4) == 0x44) {
+ /* MPEG-2 PACK */
+ if (len < 14)
+ return FALSE;
+
+ if ((data[6] & 0x04) != 0x04 ||
+ (data[8] & 0x04) != 0x04 ||
+ (data[9] & 0x01) != 0x01 || (data[12] & 0x03) != 0x03)
+ return FALSE;
+
+ stuff_len = data[13] & 0x07;
+
+ /* Check the following header bytes, if we can */
+ if ((14 + stuff_len + 4) <= len) {
+ if (!IS_MPEG_HEADER (data + 14 + stuff_len))
+ return FALSE;
+ }
+ if (pack_size)
+ *pack_size = 14 + stuff_len;
+ return TRUE;
+ } else if ((data[4] & 0xF1) == 0x21) {
+ /* MPEG-1 PACK */
+ if ((data[6] & 0x01) != 0x01 ||
+ (data[8] & 0x01) != 0x01 ||
+ (data[9] & 0x80) != 0x80 || (data[11] & 0x01) != 0x01)
+ return FALSE;
+
+ /* Check the following header bytes, if we can */
+ if ((12 + 4) <= len) {
+ if (!IS_MPEG_HEADER (data + 12))
+ return FALSE;
+ }
+ if (pack_size)
+ *pack_size = 12;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gboolean
+mpeg_sys_is_valid_pes (GstTypeFind * tf, guint8 * data, guint len,
+ guint * pack_size)
+{
+ guint pes_packet_len;
+
+ /* Check the PES header at the given position, assuming the header code itself
+ * was already checked */
+ if (len < 6)
+ return FALSE;
+
+ /* For MPEG Program streams, unbounded PES is not allowed, so we must have a
+ * valid length present */
+ pes_packet_len = GST_READ_UINT16_BE (data + 4);
+ if (pes_packet_len == 0)
+ return FALSE;
+
+ /* Check the following header, if we can */
+ if (6 + pes_packet_len + 4 <= len) {
+ if (!IS_MPEG_HEADER (data + 6 + pes_packet_len))
+ return FALSE;
+ }
+
+ if (pack_size)
+ *pack_size = 6 + pes_packet_len;
+ return TRUE;
+}
+
+static gboolean
+mpeg_sys_is_valid_sys (GstTypeFind * tf, guint8 * data, guint len,
+ guint * pack_size)
+{
+ guint sys_hdr_len;
+
+ /* Check the System header at the given position, assuming the header code itself
+ * was already checked */
+ if (len < 6)
+ return FALSE;
+ sys_hdr_len = GST_READ_UINT16_BE (data + 4);
+ if (sys_hdr_len < 6)
+ return FALSE;
+
+ /* Check the following header, if we can */
+ if (6 + sys_hdr_len + 4 <= len) {
+ if (!IS_MPEG_HEADER (data + 6 + sys_hdr_len))
+ return FALSE;
+ }
+
+ if (pack_size)
+ *pack_size = 6 + sys_hdr_len;
+
+ return TRUE;
+}
+
+/* calculation of possibility to identify random data as mpeg systemstream:
+ * bits that must match in header detection: 32 (or more)
+ * chance that random data is identifed: 1/2^32
+ * chance that MPEG2_MIN_PACK_HEADERS headers are identified:
+ * 1/2^(32*MPEG2_MIN_PACK_HEADERS)
+ * chance that this happens in MPEG2_MAX_PROBE_LENGTH bytes:
+ * 1-(1+1/2^(32*MPEG2_MIN_PACK_HEADERS)^MPEG2_MAX_PROBE_LENGTH)
+ * for current values:
+ * 1-(1+1/2^(32*4)^101024)
+ * = <some_number>
+ * Since we also check marker bits and pes packet lengths, this probability is a
+ * very coarse upper bound.
+ */
+static void
+mpeg_sys_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data, *data0, *first_sync, *end;
+ gint mpegversion = 0;
+ guint pack_headers = 0;
+ guint pes_headers = 0;
+ guint pack_size;
+ guint since_last_sync = 0;
+ guint32 sync_word = 0xffffffff;
+
+ G_STMT_START {
+ gint len;
+
+ len = MPEG2_MAX_PROBE_LENGTH;
+ do {
+ len = len / 2;
+ data = gst_type_find_peek (tf, 0, 5 + len);
+ } while (data == NULL && len >= 32);
+
+ if (!data)
+ return;
+
+ end = data + len;
+ }
+ G_STMT_END;
+
+ data0 = data;
+ first_sync = NULL;
+
+ while (data < end) {
+ sync_word <<= 8;
+ if (sync_word == 0x00000100) {
+ /* Found potential sync word */
+ if (first_sync == NULL)
+ first_sync = data - 3;
+
+ if (since_last_sync > 4) {
+ /* If more than 4 bytes since the last sync word, reset our counters,
+ * as we're only interested in counting contiguous packets */
+ pes_headers = pack_headers = 0;
+ }
+ pack_size = 0;
+
+ if (IS_MPEG_PACK_CODE (data[0])) {
+ if ((data[1] & 0xC0) == 0x40) {
+ /* MPEG-2 */
+ mpegversion = 2;
+ } else if ((data[1] & 0xF0) == 0x20) {
+ mpegversion = 1;
+ }
+ if (mpegversion != 0 &&
+ mpeg_sys_is_valid_pack (tf, data - 3, end - data + 3, &pack_size)) {
+ pack_headers++;
+ }
+ } else if (IS_MPEG_PES_CODE (data[0])) {
+ /* PES stream */
+ if (mpeg_sys_is_valid_pes (tf, data - 3, end - data + 3, &pack_size)) {
+ pes_headers++;
+ if (mpegversion == 0)
+ mpegversion = 2;
+ }
+ } else if (IS_MPEG_SYS_CODE (data[0])) {
+ if (mpeg_sys_is_valid_sys (tf, data - 3, end - data + 3, &pack_size)) {
+ pack_headers++;
+ }
+ }
+
+ /* If we found a packet with a known size, skip the bytes in it and loop
+ * around to check the next packet. */
+ if (pack_size != 0) {
+ data += pack_size - 3;
+ sync_word = 0xffffffff;
+ since_last_sync = 0;
+ continue;
+ }
+ }
+
+ sync_word |= data[0];
+ since_last_sync++;
+ data++;
+
+ /* If we have found MAX headers, and *some* were pes headers (pack headers
+ * are optional in an mpeg system stream) then return our high-probability
+ * result */
+ if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MAX_SYS_HEADERS)
+ goto suggest;
+ }
+
+ /* If we at least saw MIN headers, and *some* were pes headers (pack headers
+ * are optional in an mpeg system stream) then return a lower-probability
+ * result */
+ if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MIN_SYS_HEADERS)
+ goto suggest;
+
+ return;
+suggest:
+ {
+ guint prob;
+
+ prob = GST_TYPE_FIND_POSSIBLE + (10 * (pack_headers + pes_headers));
+ prob = MIN (prob, GST_TYPE_FIND_MAXIMUM);
+
+ /* lower probability if the first packet wasn't right at the start */
+ if (data0 != first_sync && prob >= 10)
+ prob -= 10;
+
+ GST_LOG ("Suggesting MPEG %d system stream, %d packs, %d pes, prob %u%%\n",
+ mpegversion, pack_headers, pes_headers, prob);
+
+ gst_type_find_suggest_simple (tf, prob, "video/mpeg",
+ "systemstream", G_TYPE_BOOLEAN, TRUE,
+ "mpegversion", G_TYPE_INT, mpegversion, NULL);
+ }
+};
+
+/*** video/mpegts Transport Stream ***/
+static GstStaticCaps mpegts_caps = GST_STATIC_CAPS ("video/mpegts, "
+ "systemstream = (boolean) true, packetsize = (int) [ 188, 208 ]");
+#define MPEGTS_CAPS gst_static_caps_get(&mpegts_caps)
+
+#define GST_MPEGTS_TYPEFIND_MIN_HEADERS 4
+#define GST_MPEGTS_TYPEFIND_MAX_HEADERS 10
+#define GST_MPEGTS_MAX_PACKET_SIZE 208
+#define GST_MPEGTS_TYPEFIND_SYNC_SIZE \
+ (GST_MPEGTS_TYPEFIND_MIN_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
+#define GST_MPEGTS_TYPEFIND_MAX_SYNC \
+ (GST_MPEGTS_TYPEFIND_MAX_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
+#define GST_MPEGTS_TYPEFIND_SCAN_LENGTH \
+ (GST_MPEGTS_TYPEFIND_MAX_SYNC * 4)
+
+#define MPEGTS_HDR_SIZE 4
+/* Check for sync byte, error_indicator == 0 and packet has payload */
+#define IS_MPEGTS_HEADER(data) (((data)[0] == 0x47) && \
+ (((data)[1] & 0x80) == 0x00) && \
+ (((data)[3] & 0x30) != 0x00))
+
+/* Helper function to search ahead at intervals of packet_size for mpegts
+ * headers */
+static gint
+mpeg_ts_probe_headers (GstTypeFind * tf, guint64 offset, gint packet_size)
+{
+ /* We always enter this function having found at least one header already */
+ gint found = 1;
+ guint8 *data = NULL;
+
+ GST_LOG ("looking for mpeg-ts packets of size %u", packet_size);
+ while (found < GST_MPEGTS_TYPEFIND_MAX_HEADERS) {
+ offset += packet_size;
+
+ data = gst_type_find_peek (tf, offset, MPEGTS_HDR_SIZE);
+ if (data == NULL || !IS_MPEGTS_HEADER (data))
+ return found;
+
+ found++;
+ GST_LOG ("mpeg-ts sync #%2d at offset %" G_GUINT64_FORMAT, found, offset);
+ }
+
+ return found;
+}
+
+/* Try and detect at least 4 packets in at most 10 packets worth of
+ * data. Need to try several possible packet sizes */
+static void
+mpeg_ts_type_find (GstTypeFind * tf, gpointer unused)
+{
+ /* TS packet sizes to test: normal, DVHS packet size and
+ * FEC with 16 or 20 byte codes packet size. */
+ const gint pack_sizes[] = { 188, 192, 204, 208 };
+
+ guint8 *data = NULL;
+ guint size = 0;
+ guint64 skipped = 0;
+
+ while (skipped < GST_MPEGTS_TYPEFIND_SCAN_LENGTH) {
+ if (size < MPEGTS_HDR_SIZE) {
+ data = gst_type_find_peek (tf, skipped, GST_MPEGTS_TYPEFIND_SYNC_SIZE);
+ if (!data)
+ break;
+ size = GST_MPEGTS_TYPEFIND_SYNC_SIZE;
+ }
+
+ /* Have at least MPEGTS_HDR_SIZE bytes at this point */
+ if (IS_MPEGTS_HEADER (data)) {
+ gint p;
+
+ GST_LOG ("possible mpeg-ts sync at offset %" G_GUINT64_FORMAT, skipped);
+
+ for (p = 0; p < G_N_ELEMENTS (pack_sizes); p++) {
+ gint found;
+
+ /* Probe ahead at size pack_sizes[p] */
+ found = mpeg_ts_probe_headers (tf, skipped, pack_sizes[p]);
+ if (found >= GST_MPEGTS_TYPEFIND_MIN_HEADERS) {
+ gint probability;
+
+ /* found at least 4 headers. 10 headers = MAXIMUM probability.
+ * Arbitrarily, I assigned 10% probability for each header we
+ * found, 40% -> 100% */
+ probability = MIN (10 * found, GST_TYPE_FIND_MAXIMUM);
+
+ gst_type_find_suggest_simple (tf, probability, "video/mpegts",
+ "systemstream", G_TYPE_BOOLEAN, TRUE,
+ "packetsize", G_TYPE_INT, pack_sizes[p], NULL);
+ return;
+ }
+ }
+ }
+ data++;
+ skipped++;
+ size--;
+ }
+}
+
+#define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
+#define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
+
+/* Scan ahead a maximum of max_extra_offset bytes until the next IS_MPEG_HEADER
+ * offset. After the call, offset will be after the 0x000001, i.e. at the 4th
+ * byte of the MPEG header. Returns TRUE if a header was found, FALSE if not.
+ */
+static gboolean
+mpeg_find_next_header (GstTypeFind * tf, DataScanCtx * c,
+ guint64 max_extra_offset)
+{
+ guint64 extra_offset;
+
+ for (extra_offset = 0; extra_offset <= max_extra_offset; ++extra_offset) {
+ if (!data_scan_ctx_ensure_data (tf, c, 4))
+ return FALSE;
+ if (IS_MPEG_HEADER (c->data)) {
+ data_scan_ctx_advance (tf, c, 3);
+ return TRUE;
+ }
+ data_scan_ctx_advance (tf, c, 1);
+ }
+ return FALSE;
+}
+
+/*** video/mpeg MPEG-4 elementary video stream ***/
+
+static GstStaticCaps mpeg4_video_caps = GST_STATIC_CAPS ("video/mpeg, "
+ "systemstream=(boolean)false, mpegversion=4, parsed=(boolean)false");
+#define MPEG4_VIDEO_CAPS gst_static_caps_get(&mpeg4_video_caps)
+
+/*
+ * This typefind is based on the elementary video header defined in
+ * http://xhelmboyx.tripod.com/formats/mpeg-layout.txt
+ * In addition, it allows the visual object sequence header to be
+ * absent, and even the VOS header to be absent. In the latter case,
+ * a number of VOPs have to be present.
+ */
+static void
+mpeg4_video_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+ gboolean seen_vios_at_0 = FALSE;
+ gboolean seen_vios = FALSE;
+ gboolean seen_vos = FALSE;
+ gboolean seen_vol = FALSE;
+ guint num_vop_headers = 0;
+ guint8 sc;
+
+ while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
+ if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
+ break;
+
+ if (!mpeg_find_next_header (tf, &c,
+ GST_MPEGVID_TYPEFIND_TRY_SYNC - c.offset))
+ break;
+
+ sc = c.data[0];
+
+ /* visual_object_sequence_start_code */
+ if (sc == 0xB0) {
+ if (seen_vios)
+ break; /* Terminate at second vios */
+ if (c.offset == 0)
+ seen_vios_at_0 = TRUE;
+ seen_vios = TRUE;
+ data_scan_ctx_advance (tf, &c, 2);
+ if (!mpeg_find_next_header (tf, &c, 0))
+ break;
+
+ sc = c.data[0];
+
+ /* Optional metadata */
+ if (sc == 0xB2)
+ if (!mpeg_find_next_header (tf, &c, 24))
+ break;
+ }
+
+ /* visual_object_start_code (consider it optional) */
+ if (sc == 0xB5) {
+ data_scan_ctx_advance (tf, &c, 2);
+ /* may contain ID marker and YUV clamping */
+ if (!mpeg_find_next_header (tf, &c, 7))
+ break;
+
+ sc = c.data[0];
+ }
+
+ /* video_object_start_code */
+ if (sc <= 0x1F) {
+ if (seen_vos)
+ break; /* Terminate at second vos */
+ seen_vos = TRUE;
+ data_scan_ctx_advance (tf, &c, 2);
+ continue;
+ }
+
+ /* video_object_layer_start_code */
+ if (sc >= 0x20 && sc <= 0x2F) {
+ seen_vol = TRUE;
+ data_scan_ctx_advance (tf, &c, 5);
+ continue;
+ }
+
+ /* video_object_plane_start_code */
+ if (sc == 0xB6) {
+ num_vop_headers++;
+ data_scan_ctx_advance (tf, &c, 2);
+ continue;
+ }
+
+ /* Unknown start code. */
+ }
+
+ if (num_vop_headers > 0 || seen_vol) {
+ GstTypeFindProbability probability = 0;
+
+ GST_LOG ("Found %d pictures, vios: %d, vos:%d, vol:%d", num_vop_headers,
+ seen_vios, seen_vos, seen_vol);
+
+ if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios_at_0
+ && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_MAXIMUM - 1;
+ else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios
+ && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
+ else if (seen_vios_at_0 && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
+ else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vos
+ && seen_vol)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
+ else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vol)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
+ else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
+ probability = GST_TYPE_FIND_LIKELY - 1;
+ else if (num_vop_headers > 2 && seen_vios && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_LIKELY - 9;
+ else if (seen_vios && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_LIKELY - 20;
+ else if (num_vop_headers > 0 && seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_POSSIBLE;
+ else if (num_vop_headers > 0)
+ probability = GST_TYPE_FIND_POSSIBLE - 10;
+ else if (seen_vos && seen_vol)
+ probability = GST_TYPE_FIND_POSSIBLE - 20;
+
+ gst_type_find_suggest (tf, probability, MPEG4_VIDEO_CAPS);
+ }
+}
+
+/*** video/x-h263 H263 video stream ***/
+static GstStaticCaps h263_video_caps = GST_STATIC_CAPS ("video/x-h263");
+
+#define H263_VIDEO_CAPS gst_static_caps_get(&h263_video_caps)
+
+#define H263_MAX_PROBE_LENGTH (128 * 1024)
+
+static void
+h263_video_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+ guint64 data = 0;
+ guint64 psc = 0;
+ guint8 tr = 0;
+ guint format;
+ guint good = 0;
+ guint bad = 0;
+
+ while (c.offset < H263_MAX_PROBE_LENGTH) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
+ break;
+
+ /* Find the picture start code */
+ data = (data << 8) + c.data[0];
+ psc = data & G_GUINT64_CONSTANT (0xfffffc0000);
+ if (psc == 0x800000) {
+ /* Found PSC */
+ /* TR */
+ tr = (data & 0x3fc) >> 2;
+ /* Source Format */
+ format = tr & 0x07;
+
+ /* Now that we have a Valid PSC, check if we also have a valid PTYPE and
+ the Source Format, which should range between 1 and 5 */
+ if (((tr >> 6) == 0x2) && (format > 0 && format < 6))
+ good++;
+ else
+ bad++;
+
+ /* FIXME: maybe bail out early if we get mostly bad syncs ? */
+ }
+
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+
+ if (good > 0 && bad == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H263_VIDEO_CAPS);
+ else if (good > 2 * bad)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H263_VIDEO_CAPS);
+
+ return;
+}
+
+/*** video/x-h264 H264 elementary video stream ***/
+
+static GstStaticCaps h264_video_caps =
+GST_STATIC_CAPS ("video/x-h264,stream-format=byte-stream");
+
+#define H264_VIDEO_CAPS gst_static_caps_get(&h264_video_caps)
+
+#define H264_MAX_PROBE_LENGTH (128 * 1024) /* 128kB for HD should be enough. */
+
+static void
+h264_video_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+
+ /* Stream consists of: a series of sync codes (00 00 00 01) followed
+ * by NALs
+ */
+ int nut, ref;
+ int good = 0;
+ int bad = 0;
+
+ while (c.offset < H264_MAX_PROBE_LENGTH) {
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
+ break;
+
+ if (IS_MPEG_HEADER (c.data)) {
+ nut = c.data[3] & 0x9f; /* forbiden_zero_bit | nal_unit_type */
+ ref = c.data[3] & 0x60; /* nal_ref_idc */
+
+ /* if forbiden bit is different to 0 won't be h264 */
+ if (nut > 0x1f) {
+ bad++;
+ break;
+ }
+
+ /* collect statistics about the NAL types */
+ if ((nut >= 1 && nut <= 13) || nut == 19) {
+ if ((nut == 5 && ref == 0) ||
+ ((nut == 6 || (nut >= 9 && nut <= 12)) && ref != 0)) {
+ bad++;
+ } else {
+ good++;
+ }
+ } else if (nut >= 14 && nut <= 33) {
+ /* reserved */
+ /* Theoretically these are good, since if they exist in the
+ stream it merely means that a newer backwards-compatible
+ h.264 stream. But we should be identifying that separately. */
+ bad++;
+ } else {
+ /* unspecified, application specific */
+ /* don't consider these bad */
+ }
+
+ GST_DEBUG ("good %d bad %d", good, bad);
+
+ if (good >= 10 && bad < 4) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H264_VIDEO_CAPS);
+ return;
+ }
+
+ data_scan_ctx_advance (tf, &c, 4);
+ }
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+
+ if (good >= 2 && bad < 1) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H264_VIDEO_CAPS);
+ return;
+ }
+}
+
+/*** video/mpeg video stream ***/
+
+static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
+ "systemstream = (boolean) false");
+#define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
+
+/*
+ * Idea is the same as MPEG system stream typefinding: We check each
+ * byte of the stream to see if - from that point on - the stream
+ * matches a predefined set of marker bits as defined in the MPEG
+ * video specs.
+ *
+ * I'm sure someone will do a chance calculation here too.
+ */
+
+static void
+mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+ gboolean seen_seq_at_0 = FALSE;
+ gboolean seen_seq = FALSE;
+ gboolean seen_gop = FALSE;
+ guint64 last_pic_offset = 0;
+ guint num_pic_headers = 0;
+ gint found = 0;
+
+ while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
+ if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
+ break;
+
+ if (!data_scan_ctx_ensure_data (tf, &c, 5))
+ break;
+
+ if (!IS_MPEG_HEADER (c.data))
+ goto next;
+
+ /* a pack header indicates that this isn't an elementary stream */
+ if (c.data[3] == 0xBA && mpeg_sys_is_valid_pack (tf, c.data, c.size, NULL))
+ return;
+
+ /* do we have a sequence header? */
+ if (c.data[3] == 0xB3) {
+ seen_seq_at_0 = seen_seq_at_0 || (c.offset == 0);
+ seen_seq = TRUE;
+ data_scan_ctx_advance (tf, &c, 4 + 8);
+ continue;
+ }
+
+ /* or a GOP header */
+ if (c.data[3] == 0xB8) {
+ seen_gop = TRUE;
+ data_scan_ctx_advance (tf, &c, 8);
+ continue;
+ }
+
+ /* but what we'd really like to see is a picture header */
+ if (c.data[3] == 0x00) {
+ ++num_pic_headers;
+ last_pic_offset = c.offset;
+ data_scan_ctx_advance (tf, &c, 8);
+ continue;
+ }
+
+ /* ... each followed by a slice header with slice_vertical_pos=1 that's
+ * not too far away from the previously seen picture header. */
+ if (c.data[3] == 0x01 && num_pic_headers > found &&
+ (c.offset - last_pic_offset) >= 4 &&
+ (c.offset - last_pic_offset) <= 64) {
+ data_scan_ctx_advance (tf, &c, 4);
+ found += 1;
+ continue;
+ }
+
+ next:
+
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+
+ if (found > 0 || seen_seq) {
+ GstTypeFindProbability probability = 0;
+
+ GST_LOG ("Found %d pictures, seq:%d, gop:%d", found, seen_seq, seen_gop);
+
+ if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq && seen_gop)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
+ else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq)
+ probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
+ else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
+ probability = GST_TYPE_FIND_LIKELY;
+ else if (seen_seq_at_0 && seen_gop && found > 2)
+ probability = GST_TYPE_FIND_LIKELY - 10;
+ else if (seen_seq && seen_gop && found > 2)
+ probability = GST_TYPE_FIND_LIKELY - 20;
+ else if (seen_seq_at_0 && found > 0)
+ probability = GST_TYPE_FIND_POSSIBLE;
+ else if (seen_seq && found > 0)
+ probability = GST_TYPE_FIND_POSSIBLE - 5;
+ else if (found > 0)
+ probability = GST_TYPE_FIND_POSSIBLE - 10;
+ else if (seen_seq)
+ probability = GST_TYPE_FIND_POSSIBLE - 20;
+
+ gst_type_find_suggest_simple (tf, probability, "video/mpeg",
+ "systemstream", G_TYPE_BOOLEAN, FALSE,
+ "mpegversion", G_TYPE_INT, 1, NULL);
+ }
+}
+
+/*** audio/x-aiff ***/
+
+static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
+
+#define AIFF_CAPS gst_static_caps_get(&aiff_caps)
+static void
+aiff_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data && memcmp (data, "FORM", 4) == 0) {
+ data += 8;
+ if (memcmp (data, "AIFF", 4) == 0 || memcmp (data, "AIFC", 4) == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
+ }
+}
+
+/*** audio/x-svx ***/
+
+static GstStaticCaps svx_caps = GST_STATIC_CAPS ("audio/x-svx");
+
+#define SVX_CAPS gst_static_caps_get(&svx_caps)
+static void
+svx_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data && memcmp (data, "FORM", 4) == 0) {
+ data += 8;
+ if (memcmp (data, "8SVX", 4) == 0 || memcmp (data, "16SV", 4) == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVX_CAPS);
+ }
+}
+
+/*** audio/x-shorten ***/
+
+static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
+
+#define SHN_CAPS gst_static_caps_get(&shn_caps)
+static void
+shn_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data && memcmp (data, "ajkg", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
+ }
+ data = gst_type_find_peek (tf, -8, 8);
+ if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
+ }
+}
+
+/*** application/x-ape ***/
+
+static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
+
+#define APE_CAPS gst_static_caps_get(&ape_caps)
+static void
+ape_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data && memcmp (data, "MAC ", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, APE_CAPS);
+ }
+}
+
+/*** ISO FORMATS ***/
+
+/*** audio/x-m4a ***/
+
+static GstStaticCaps m4a_caps = GST_STATIC_CAPS ("audio/x-m4a");
+
+#define M4A_CAPS (gst_static_caps_get(&m4a_caps))
+static void
+m4a_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 4, 8);
+
+ if (data && (memcmp (data, "ftypM4A ", 8) == 0)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M4A_CAPS);
+ }
+}
+
+/*** application/x-3gp ***/
+
+/* The Q is there because variables can't start with a number. */
+static GstStaticCaps q3gp_caps = GST_STATIC_CAPS ("application/x-3gp");
+#define Q3GP_CAPS (gst_static_caps_get(&q3gp_caps))
+
+static const gchar *
+q3gp_type_find_get_profile (const guint8 * data)
+{
+ switch (GST_MAKE_FOURCC (data[0], data[1], data[2], 0)) {
+ case GST_MAKE_FOURCC ('3', 'g', 'g', 0):
+ return "general";
+ case GST_MAKE_FOURCC ('3', 'g', 'p', 0):
+ return "basic";
+ case GST_MAKE_FOURCC ('3', 'g', 's', 0):
+ return "streaming-server";
+ case GST_MAKE_FOURCC ('3', 'g', 'r', 0):
+ return "progressive-download";
+ default:
+ break;
+ }
+ return NULL;
+}
+
+static void
+q3gp_type_find (GstTypeFind * tf, gpointer unused)
+{
+ const gchar *profile;
+ guint32 ftyp_size = 0;
+ gint offset = 0;
+ guint8 *data = NULL;
+
+ if ((data = gst_type_find_peek (tf, 0, 12)) == NULL) {
+ return;
+ }
+
+ data += 4;
+ if (memcmp (data, "ftyp", 4) != 0) {
+ return;
+ }
+
+ /* check major brand */
+ data += 4;
+ if ((profile = q3gp_type_find_get_profile (data))) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
+ return;
+ }
+
+ /* check compatible brands */
+ if ((data = gst_type_find_peek (tf, 0, 4)) != NULL) {
+ ftyp_size = GST_READ_UINT32_BE (data);
+ }
+ for (offset = 16; offset < ftyp_size; offset += 4) {
+ if ((data = gst_type_find_peek (tf, offset, 3)) == NULL) {
+ break;
+ }
+ if ((profile = q3gp_type_find_get_profile (data))) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
+ return;
+ }
+ }
+
+ return;
+
+}
+
+/*** video/mj2 and image/jp2 ***/
+static GstStaticCaps mj2_caps = GST_STATIC_CAPS ("video/mj2");
+
+#define MJ2_CAPS gst_static_caps_get(&mj2_caps)
+
+static GstStaticCaps jp2_caps = GST_STATIC_CAPS ("image/jp2");
+
+#define JP2_CAPS gst_static_caps_get(&jp2_caps)
+
+static void
+jp2_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data;
+
+ data = gst_type_find_peek (tf, 0, 24);
+ if (!data)
+ return;
+
+ /* jp2 signature */
+ if (memcmp (data, "\000\000\000\014jP \015\012\207\012", 12) != 0)
+ return;
+
+ /* check ftyp box */
+ data += 12;
+ if (memcmp (data + 4, "ftyp", 4) == 0) {
+ if (memcmp (data + 8, "jp2 ", 4) == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JP2_CAPS);
+ else if (memcmp (data + 8, "mjp2", 4) == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MJ2_CAPS);
+ }
+}
+
+/*** video/quicktime ***/
+
+static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
+
+#define QT_CAPS gst_static_caps_get(&qt_caps)
+#define STRNCMP(x,y,z) (strncmp ((char*)(x), (char*)(y), z))
+
+/* FIXME 0.11: go through http://www.ftyps.com/ */
+static void
+qt_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data;
+ guint tip = 0;
+ guint64 offset = 0;
+ guint64 size;
+ const gchar *variant = NULL;
+
+ while ((data = gst_type_find_peek (tf, offset, 12)) != NULL) {
+ guint64 new_offset;
+
+ if (STRNCMP (&data[4], "ftypqt ", 8) == 0) {
+ tip = GST_TYPE_FIND_MAXIMUM;
+ break;
+ }
+
+ if (STRNCMP (&data[4], "ftypisom", 8) == 0 ||
+ STRNCMP (&data[4], "ftypavc1", 8) == 0 ||
+ STRNCMP (&data[4], "ftypmp42", 8) == 0) {
+ tip = GST_TYPE_FIND_MAXIMUM;
+ variant = "iso";
+ break;
+ }
+
+ /* box/atom types that are in common with ISO base media file format */
+ if (STRNCMP (&data[4], "moov", 4) == 0 ||
+ STRNCMP (&data[4], "mdat", 4) == 0 ||
+ STRNCMP (&data[4], "ftyp", 4) == 0 ||
+ STRNCMP (&data[4], "free", 4) == 0 ||
+ STRNCMP (&data[4], "uuid", 4) == 0 ||
+ STRNCMP (&data[4], "skip", 4) == 0) {
+ if (tip == 0) {
+ tip = GST_TYPE_FIND_LIKELY;
+ } else {
+ tip = GST_TYPE_FIND_NEARLY_CERTAIN;
+ }
+ }
+ /* other box/atom types, apparently quicktime specific */
+ else if (STRNCMP (&data[4], "pnot", 4) == 0 ||
+ STRNCMP (&data[4], "PICT", 4) == 0 ||
+ STRNCMP (&data[4], "wide", 4) == 0 ||
+ STRNCMP (&data[4], "prfl", 4) == 0) {
+ tip = GST_TYPE_FIND_MAXIMUM;
+ break;
+ } else {
+ tip = 0;
+ break;
+ }
+
+ size = GST_READ_UINT32_BE (data);
+ /* check compatible brands rather than ever expaning major brands above */
+ if ((STRNCMP (&data[4], "ftyp", 4) == 0) && (size >= 16)) {
+ new_offset = offset + 12;
+ while (new_offset + 4 <= offset + size) {
+ data = gst_type_find_peek (tf, new_offset, 4);
+ if (data == NULL)
+ goto done;
+ if (STRNCMP (&data[4], "isom", 4) == 0 ||
+ STRNCMP (&data[4], "avc1", 4) == 0 ||
+ STRNCMP (&data[4], "mp41", 4) == 0 ||
+ STRNCMP (&data[4], "mp42", 4) == 0) {
+ tip = GST_TYPE_FIND_MAXIMUM;
+ variant = "iso";
+ goto done;
+ }
+ new_offset += 4;
+ }
+ }
+ if (size == 1) {
+ guint8 *sizedata;
+
+ sizedata = gst_type_find_peek (tf, offset + 8, 8);
+ if (sizedata == NULL)
+ break;
+
+ size = GST_READ_UINT64_BE (sizedata);
+ } else {
+ if (size < 8)
+ break;
+ }
+ new_offset = offset + size;
+ if (new_offset <= offset)
+ break;
+ offset = new_offset;
+ }
+
+done:
+ if (tip > 0) {
+ if (variant) {
+ GstCaps *caps = gst_caps_copy (QT_CAPS);
+
+ gst_caps_set_simple (caps, "variant", G_TYPE_STRING, variant, NULL);
+ gst_type_find_suggest (tf, tip, caps);
+ gst_caps_unref (caps);
+ } else {
+ gst_type_find_suggest (tf, tip, QT_CAPS);
+ }
+ }
+};
+
+
+/*** image/x-quicktime ***/
+
+static GstStaticCaps qtif_caps = GST_STATIC_CAPS ("image/x-quicktime");
+
+#define QTIF_CAPS gst_static_caps_get(&qtif_caps)
+
+/* how many atoms we check before we give up */
+#define QTIF_MAXROUNDS 25
+
+static void
+qtif_type_find (GstTypeFind * tf, gpointer unused)
+{
+ const guint8 *data;
+ gboolean found_idsc = FALSE;
+ gboolean found_idat = FALSE;
+ guint64 offset = 0;
+ guint rounds = 0;
+
+ while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
+ guint64 size;
+
+ size = GST_READ_UINT32_BE (data);
+ if (size == 1) {
+ const guint8 *sizedata;
+
+ sizedata = gst_type_find_peek (tf, offset + 8, 8);
+ if (sizedata == NULL)
+ break;
+
+ size = GST_READ_UINT64_BE (sizedata);
+ }
+ if (size < 8)
+ break;
+
+ if (STRNCMP (data + 4, "idsc", 4) == 0)
+ found_idsc = TRUE;
+ if (STRNCMP (data + 4, "idat", 4) == 0)
+ found_idat = TRUE;
+
+ if (found_idsc && found_idat) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, QTIF_CAPS);
+ return;
+ }
+
+ offset += size;
+ if (++rounds > QTIF_MAXROUNDS)
+ break;
+ }
+
+ if (found_idsc || found_idat) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, QTIF_CAPS);
+ return;
+ }
+};
+
+/*** audio/x-mod ***/
+
+static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
+
+#define MOD_CAPS gst_static_caps_get(&mod_caps)
+/* FIXME: M15 CheckType to do */
+static void
+mod_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data;
+
+ /* MOD */
+ if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
+ /* Protracker and variants */
+ if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
+ /* Star Tracker */
+ (memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
+ (memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
+ /* Oktalyzer (Amiga) */
+ (memcmp (data, "OKTA", 4) == 0) ||
+ /* Oktalyser (Atari) */
+ (memcmp (data, "CD81", 4) == 0) ||
+ /* Fasttracker */
+ (memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
+ /* Fasttracker or Taketracker */
+ (memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
+ && isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
+ && isdigit (data[0]) && isdigit (data[1]))) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ /* XM */
+ if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
+ if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ /* OKT */
+ if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
+ if (memcmp (data, "OKTASONG", 8) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
+ /* 669 */
+ if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
+ return;
+ }
+ /* AMF */
+ if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
+ /* IT */
+ (memcmp (data, "IMPM", 4) == 0) ||
+ /* MED */
+ (memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
+ /* MTM */
+ (memcmp (data, "MTM", 3) == 0)) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ /* DSM */
+ if (memcmp (data, "RIFF", 4) == 0) {
+ guint8 *data2 = gst_type_find_peek (tf, 8, 4);
+
+ if (data2) {
+ if (memcmp (data2, "DSMF", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ }
+ /* FAM */
+ if (memcmp (data, "FAM\xFE", 4) == 0) {
+ guint8 *data2 = gst_type_find_peek (tf, 44, 3);
+
+ if (data2) {
+ if (memcmp (data2, "compare", 3) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ } else {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
+ return;
+ }
+ }
+ /* GDM */
+ if (memcmp (data, "GDM\xFE", 4) == 0) {
+ guint8 *data2 = gst_type_find_peek (tf, 71, 4);
+
+ if (data2) {
+ if (memcmp (data2, "GMFS", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ } else {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
+ return;
+ }
+ }
+ }
+ /* IMF */
+ if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
+ if (memcmp (data, "IM10", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ /* S3M */
+ if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
+ if (memcmp (data, "SCRM", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+ /* STM */
+ if ((data = gst_type_find_peek (tf, 20, 8)) != NULL) {
+ if (g_ascii_strncasecmp ((gchar *) data, "!Scream!", 8) == 0 ||
+ g_ascii_strncasecmp ((gchar *) data, "BMOD2STM", 8) == 0) {
+ guint8 *id, *stmtype;
+
+ if ((id = gst_type_find_peek (tf, 28, 1)) == NULL)
+ return;
+ if ((stmtype = gst_type_find_peek (tf, 29, 1)) == NULL)
+ return;
+ if (*id == 0x1A && *stmtype == 2)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
+ return;
+ }
+ }
+}
+
+/*** application/x-shockwave-flash ***/
+
+static GstStaticCaps swf_caps =
+GST_STATIC_CAPS ("application/x-shockwave-flash");
+#define SWF_CAPS (gst_static_caps_get(&swf_caps))
+static void
+swf_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data && (data[0] == 'F' || data[0] == 'C') &&
+ data[1] == 'W' && data[2] == 'S') {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
+ }
+}
+
+/*** image/jpeg ***/
+
+#define JPEG_MARKER_IS_START_OF_FRAME(x) \
+ ((x)>=0xc0 && (x) <= 0xcf && (x)!=0xc4 && (x)!=0xc8 && (x)!=0xcc)
+
+static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
+
+#define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
+static void
+jpeg_type_find (GstTypeFind * tf, gpointer unused)
+{
+ GstTypeFindProbability prob = GST_TYPE_FIND_POSSIBLE;
+ DataScanCtx c = { 0, NULL, 0 };
+ GstCaps *caps;
+ guint num_markers;
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 2)))
+ return;
+
+ if (c.data[0] != 0xff || c.data[1] != 0xd8)
+ return;
+
+ num_markers = 1;
+ data_scan_ctx_advance (tf, &c, 2);
+
+ caps = gst_caps_copy (JPEG_CAPS);
+
+ while (data_scan_ctx_ensure_data (tf, &c, 4) && c.offset < (200 * 1024)) {
+ guint16 len;
+ guint8 marker;
+
+ if (c.data[0] != 0xff)
+ break;
+
+ marker = c.data[1];
+ if (G_UNLIKELY (marker == 0xff)) {
+ data_scan_ctx_advance (tf, &c, 1);
+ continue;
+ }
+
+ data_scan_ctx_advance (tf, &c, 2);
+
+ /* we assume all markers we'll see before SOF have a payload length; if
+ * that's not the case we'll just detect a false sync and bail out, but
+ * still report POSSIBLE probability */
+ len = GST_READ_UINT16_BE (c.data);
+
+ GST_LOG ("possible JPEG marker 0x%02x (@0x%04x), segment length %u",
+ marker, (guint) c.offset, len);
+
+ if (!data_scan_ctx_ensure_data (tf, &c, len))
+ break;
+
+ if (marker == 0xc4 || /* DEFINE_HUFFMAN_TABLES */
+ marker == 0xcc || /* DEFINE_ARITHMETIC_CONDITIONING */
+ marker == 0xdb || /* DEFINE_QUANTIZATION_TABLES */
+ marker == 0xdd || /* DEFINE_RESTART_INTERVAL */
+ marker == 0xfe) { /* COMMENT */
+ data_scan_ctx_advance (tf, &c, len);
+ ++num_markers;
+ } else if (marker == 0xe0 && len >= (2 + 4) && /* APP0 */
+ data_scan_ctx_memcmp (tf, &c, 2, "JFIF", 4)) {
+ GST_LOG ("found JFIF tag");
+ prob = GST_TYPE_FIND_MAXIMUM;
+ data_scan_ctx_advance (tf, &c, len);
+ ++num_markers;
+ /* we continue until we find a start of frame marker */
+ } else if (marker == 0xe1 && len >= (2 + 4) && /* APP1 */
+ data_scan_ctx_memcmp (tf, &c, 2, "Exif", 4)) {
+ GST_LOG ("found Exif tag");
+ prob = GST_TYPE_FIND_MAXIMUM;
+ data_scan_ctx_advance (tf, &c, len);
+ ++num_markers;
+ /* we continue until we find a start of frame marker */
+ } else if (marker >= 0xe0 && marker <= 0xef) { /* APPn */
+ data_scan_ctx_advance (tf, &c, len);
+ ++num_markers;
+ } else if (JPEG_MARKER_IS_START_OF_FRAME (marker) && len >= (2 + 8)) {
+ int h, w;
+
+ h = GST_READ_UINT16_BE (c.data + 2 + 1);
+ w = GST_READ_UINT16_BE (c.data + 2 + 1 + 2);
+ if (h == 0 || w == 0) {
+ GST_WARNING ("bad width %u and/or height %u in SOF header", w, h);
+ break;
+ }
+
+ GST_LOG ("SOF at offset %" G_GUINT64_FORMAT ", num_markers=%d, "
+ "WxH=%dx%d", c.offset - 2, num_markers, w, h);
+
+ if (num_markers >= 5 || prob == GST_TYPE_FIND_MAXIMUM)
+ prob = GST_TYPE_FIND_MAXIMUM;
+ else
+ prob = GST_TYPE_FIND_LIKELY;
+
+ gst_caps_set_simple (caps, "width", G_TYPE_INT, w,
+ "height", G_TYPE_INT, h, NULL);
+ break;
+ } else {
+ GST_WARNING ("bad length or unexpected JPEG marker 0xff 0x%02x", marker);
+ break;
+ }
+ }
+
+ gst_type_find_suggest (tf, prob, caps);
+ gst_caps_unref (caps);
+}
+
+/*** image/bmp ***/
+
+static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
+
+#define BMP_CAPS (gst_static_caps_get(&bmp_caps))
+static void
+bmp_type_find (GstTypeFind * tf, gpointer unused)
+{
+ DataScanCtx c = { 0, NULL, 0 };
+ guint32 struct_size, w, h, planes, bpp;
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 54)))
+ return;
+
+ if (c.data[0] != 'B' || c.data[1] != 'M')
+ return;
+
+ /* skip marker + size */
+ data_scan_ctx_advance (tf, &c, 2 + 4);
+
+ /* reserved, must be 0 */
+ if (c.data[0] != 0 || c.data[1] != 0 || c.data[2] != 0 || c.data[3] != 0)
+ return;
+
+ data_scan_ctx_advance (tf, &c, 2 + 2);
+
+ /* offset to start of image data in bytes (check for sanity) */
+ GST_LOG ("offset=%u", GST_READ_UINT32_LE (c.data));
+ if (GST_READ_UINT32_LE (c.data) > (10 * 1024 * 1024))
+ return;
+
+ struct_size = GST_READ_UINT32_LE (c.data + 4);
+ GST_LOG ("struct_size=%u", struct_size);
+
+ data_scan_ctx_advance (tf, &c, 4 + 4);
+
+ if (struct_size == 0x0C) {
+ w = GST_READ_UINT16_LE (c.data);
+ h = GST_READ_UINT16_LE (c.data + 2);
+ planes = GST_READ_UINT16_LE (c.data + 2 + 2);
+ bpp = GST_READ_UINT16_LE (c.data + 2 + 2 + 2);
+ } else if (struct_size == 40 || struct_size == 64 || struct_size == 108
+ || struct_size == 124 || struct_size == 0xF0) {
+ w = GST_READ_UINT32_LE (c.data);
+ h = GST_READ_UINT32_LE (c.data + 4);
+ planes = GST_READ_UINT16_LE (c.data + 4 + 4);
+ bpp = GST_READ_UINT16_LE (c.data + 4 + 4 + 2);
+ } else {
+ return;
+ }
+
+ /* image sizes sanity check */
+ GST_LOG ("w=%u, h=%u, planes=%u, bpp=%u", w, h, planes, bpp);
+ if (w == 0 || w > 0xfffff || h == 0 || h > 0xfffff || planes != 1 ||
+ (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32))
+ return;
+
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "image/bmp",
+ "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, "bpp", G_TYPE_INT, bpp,
+ NULL);
+}
+
+/*** image/tiff ***/
+static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
+ "endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
+#define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
+static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
+ "endianness = (int) BIG_ENDIAN");
+#define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
+static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
+ "endianness = (int) LITTLE_ENDIAN");
+#define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
+static void
+tiff_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 8);
+ guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
+ guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
+
+ if (data) {
+ if (memcmp (data, le_header, 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
+ } else if (memcmp (data, be_header, 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
+ }
+ }
+}
+
+/*** PNM ***/
+
+static GstStaticCaps pnm_caps = GST_STATIC_CAPS ("image/x-portable-bitmap; "
+ "image/x-portable-graymap; image/x-portable-pixmap; "
+ "image/x-portable-anymap");
+
+#define PNM_CAPS (gst_static_caps_get(&pnm_caps))
+
+#define IS_PNM_WHITESPACE(c) \
+ ((c) == ' ' || (c) == '\r' || (c) == '\n' || (c) == 't')
+
+static void
+pnm_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ const gchar *media_type = NULL;
+ DataScanCtx c = { 0, NULL, 0 };
+ guint h = 0, w = 0;
+
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 16)))
+ return;
+
+ /* see http://en.wikipedia.org/wiki/Netpbm_format */
+ if (c.data[0] != 'P' || c.data[1] < '1' || c.data[1] > '7' ||
+ !IS_PNM_WHITESPACE (c.data[2]) ||
+ (c.data[3] != '#' && c.data[3] < '0' && c.data[3] > '9'))
+ return;
+
+ switch (c.data[1]) {
+ case '1':
+ media_type = "image/x-portable-bitmap"; /* ASCII */
+ break;
+ case '2':
+ media_type = "image/x-portable-graymap"; /* ASCII */
+ break;
+ case '3':
+ media_type = "image/x-portable-pixmap"; /* ASCII */
+ break;
+ case '4':
+ media_type = "image/x-portable-bitmap"; /* Raw */
+ break;
+ case '5':
+ media_type = "image/x-portable-graymap"; /* Raw */
+ break;
+ case '6':
+ media_type = "image/x-portable-pixmap"; /* Raw */
+ break;
+ case '7':
+ media_type = "image/x-portable-anymap";
+ break;
+ default:
+ g_return_if_reached ();
+ }
+
+ /* try to extract width and height as well */
+ if (c.data[1] != '7') {
+ gchar s[64] = { 0, }
+ , sep1, sep2;
+
+ /* need to skip any comment lines first */
+ data_scan_ctx_advance (tf, &c, 3);
+ while (c.data[0] == '#') { /* we know there's still data left */
+ data_scan_ctx_advance (tf, &c, 1);
+ while (c.data[0] != '\n' && c.data[0] != '\r') {
+ if (!data_scan_ctx_ensure_data (tf, &c, 4))
+ return;
+ data_scan_ctx_advance (tf, &c, 1);
+ }
+ data_scan_ctx_advance (tf, &c, 1);
+ GST_LOG ("skipped comment line in PNM header");
+ }
+
+ if (!data_scan_ctx_ensure_data (tf, &c, 32) &&
+ !data_scan_ctx_ensure_data (tf, &c, 4)) {
+ return;
+ }
+
+ /* need to NUL-terminate data for sscanf */
+ memcpy (s, c.data, MIN (sizeof (s) - 1, c.size));
+ if (sscanf (s, "%u%c%u%c", &w, &sep1, &h, &sep2) == 4 &&
+ IS_PNM_WHITESPACE (sep1) && IS_PNM_WHITESPACE (sep2) &&
+ w > 0 && w < G_MAXINT && h > 0 && h < G_MAXINT) {
+ GST_LOG ("extracted PNM width and height: %dx%d", w, h);
+ } else {
+ w = 0;
+ h = 0;
+ }
+ } else {
+ /* FIXME: extract width + height for anymaps too */
+ }
+
+ if (w > 0 && h > 0) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, media_type,
+ "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL);
+ } else {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, media_type, NULL);
+ }
+}
+
+static GstStaticCaps sds_caps = GST_STATIC_CAPS ("audio/x-sds");
+
+#define SDS_CAPS (gst_static_caps_get(&sds_caps))
+static void
+sds_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+ guint8 mask[4] = { 0xFF, 0xFF, 0x80, 0xFF };
+ guint8 match[4] = { 0xF0, 0x7E, 0, 0x01 };
+ gint x;
+
+ if (data) {
+ for (x = 0; x < 4; x++) {
+ if ((data[x] & mask[x]) != match[x]) {
+ return;
+ }
+ }
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDS_CAPS);
+ }
+}
+
+static GstStaticCaps ircam_caps = GST_STATIC_CAPS ("audio/x-ircam");
+
+#define IRCAM_CAPS (gst_static_caps_get(&ircam_caps))
+static void
+ircam_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+ guint8 mask[4] = { 0xFF, 0xFF, 0xF8, 0xFF };
+ guint8 match[4] = { 0x64, 0xA3, 0x00, 0x00 };
+ gint x;
+ gboolean matched = TRUE;
+
+ if (!data) {
+ return;
+ }
+ for (x = 0; x < 4; x++) {
+ if ((data[x] & mask[x]) != match[x]) {
+ matched = FALSE;
+ }
+ }
+ if (matched) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, IRCAM_CAPS);
+ return;
+ }
+ /* now try the reverse version */
+ matched = TRUE;
+ for (x = 0; x < 4; x++) {
+ if ((data[x] & mask[3 - x]) != match[3 - x]) {
+ matched = FALSE;
+ }
+ }
+}
+
+/* EBML typefind helper */
+static gboolean
+ebml_check_header (GstTypeFind * tf, const gchar * doctype, int doctype_len)
+{
+ /* 4 bytes for EBML ID, 1 byte for header length identifier */
+ guint8 *data = gst_type_find_peek (tf, 0, 4 + 1);
+ gint len_mask = 0x80, size = 1, n = 1, total;
+
+ if (!data)
+ return FALSE;
+
+ /* ebml header? */
+ if (data[0] != 0x1A || data[1] != 0x45 || data[2] != 0xDF || data[3] != 0xA3)
+ return FALSE;
+
+ /* length of header */
+ total = data[4];
+ while (size <= 8 && !(total & len_mask)) {
+ size++;
+ len_mask >>= 1;
+ }
+ if (size > 8)
+ return FALSE;
+ total &= (len_mask - 1);
+ while (n < size)
+ total = (total << 8) | data[4 + n++];
+
+ /* get new data for full header, 4 bytes for EBML ID,
+ * EBML length tag and the actual header */
+ data = gst_type_find_peek (tf, 0, 4 + size + total);
+ if (!data)
+ return FALSE;
+
+ /* only check doctype if asked to do so */
+ if (doctype == NULL || doctype_len == 0)
+ return TRUE;
+
+ /* the header must contain the doctype. For now, we don't parse the
+ * whole header but simply check for the availability of that array
+ * of characters inside the header. Not fully fool-proof, but good
+ * enough. */
+ for (n = 4 + size; n <= 4 + size + total - doctype_len; n++)
+ if (!memcmp (&data[n], doctype, doctype_len))
+ return TRUE;
+
+ return FALSE;
+}
+
+/*** video/x-matroska ***/
+static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
+
+#define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
+static void
+matroska_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ if (ebml_check_header (tf, "matroska", 8))
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MATROSKA_CAPS);
+ else if (ebml_check_header (tf, NULL, 0))
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MATROSKA_CAPS);
+}
+
+/*** video/webm ***/
+static GstStaticCaps webm_caps = GST_STATIC_CAPS ("video/webm");
+
+#define WEBM_CAPS (gst_static_caps_get(&webm_caps))
+static void
+webm_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ if (ebml_check_header (tf, "webm", 4))
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, WEBM_CAPS);
+}
+
+/*** application/mxf ***/
+static GstStaticCaps mxf_caps = GST_STATIC_CAPS ("application/mxf");
+
+#define MXF_MAX_PROBE_LENGTH (1024 * 64)
+#define MXF_CAPS (gst_static_caps_get(&mxf_caps))
+
+/*
+ * MXF files start with a header partition pack key of 16 bytes which is defined
+ * at SMPTE-377M 6.1. Before this there can be up to 64K of run-in which _must_
+ * not contain the partition pack key.
+ */
+static void
+mxf_type_find (GstTypeFind * tf, gpointer ununsed)
+{
+ static const guint8 partition_pack_key[] =
+ { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
+ 0x01
+ };
+ DataScanCtx c = { 0, NULL, 0 };
+
+ while (c.offset <= MXF_MAX_PROBE_LENGTH) {
+ guint i;
+ if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 1024)))
+ break;
+
+ /* look over in chunks of 1kbytes to avoid too much overhead */
+
+ for (i = 0; i < 1024 - 16; i++) {
+ /* Check first byte before calling more expensive memcmp function */
+ if (G_UNLIKELY (c.data[i] == 0x06
+ && memcmp (c.data + i, partition_pack_key, 13) == 0)) {
+ /* Header partition pack? */
+ if (c.data[i + 13] != 0x02)
+ goto advance;
+
+ /* Partition status */
+ if (c.data[i + 14] >= 0x05)
+ goto advance;
+
+ /* Reserved, must be 0x00 */
+ if (c.data[i + 15] != 0x00)
+ goto advance;
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXF_CAPS);
+ return;
+ }
+ }
+
+ advance:
+ data_scan_ctx_advance (tf, &c, 1024 - 16);
+ }
+}
+
+/*** video/x-dv ***/
+
+static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
+ "systemstream = (boolean) true");
+#define DV_CAPS (gst_static_caps_get(&dv_caps))
+static void
+dv_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data;
+
+ data = gst_type_find_peek (tf, 0, 5);
+
+ /* check for DIF and DV flag */
+ if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00)) {
+ const gchar *format;
+
+ if (data[3] & 0x80) {
+ format = "PAL";
+ } else {
+ format = "NTSC";
+ }
+
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "video/x-dv",
+ "systemstream", G_TYPE_BOOLEAN, TRUE,
+ "format", G_TYPE_STRING, format, NULL);
+ }
+}
+
+
+/*** application/ogg and application/x-annodex ***/
+static GstStaticCaps ogg_caps = GST_STATIC_CAPS ("application/ogg");
+static GstStaticCaps annodex_caps = GST_STATIC_CAPS ("application/x-annodex");
+static GstStaticCaps ogg_annodex_caps =
+ GST_STATIC_CAPS ("application/ogg;application/x-annodex");
+
+#define OGGANX_CAPS (gst_static_caps_get(&ogg_annodex_caps))
+
+static void
+ogganx_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if ((data != NULL) && (memcmp (data, "OggS", 4) == 0)) {
+
+ /* Check for an annodex fishbone header */
+ data = gst_type_find_peek (tf, 28, 8);
+ if (data && memcmp (data, "fishead\0", 8) == 0)
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
+ gst_static_caps_get (&annodex_caps));
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
+ gst_static_caps_get (&ogg_caps));
+ }
+}
+
+/*** audio/x-vorbis ***/
+static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
+
+#define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
+static void
+vorbis_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 30);
+
+ if (data) {
+ guint blocksize_0;
+ guint blocksize_1;
+
+ /* 1 byte packet type (identification=0x01)
+ 6 byte string "vorbis"
+ 4 byte vorbis version */
+ if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
+ return;
+ data += 11;
+ /* 1 byte channels must be != 0 */
+ if (data[0] == 0)
+ return;
+ data++;
+ /* 4 byte samplerate must be != 0 */
+ if (GST_READ_UINT32_LE (data) == 0)
+ return;
+ data += 16;
+ /* blocksize checks */
+ blocksize_0 = data[0] & 0x0F;
+ blocksize_1 = (data[0] & 0xF0) >> 4;
+ if (blocksize_0 > blocksize_1)
+ return;
+ if (blocksize_0 < 6 || blocksize_0 > 13)
+ return;
+ if (blocksize_1 < 6 || blocksize_1 > 13)
+ return;
+ data++;
+ /* framing bit */
+ if ((data[0] & 0x01) != 1)
+ return;
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
+ }
+}
+
+/*** video/x-theora ***/
+
+static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
+
+#define THEORA_CAPS (gst_static_caps_get(&theora_caps))
+static void
+theora_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
+
+ if (data) {
+ if (data[0] != 0x80)
+ return;
+ if (memcmp (&data[1], "theora", 6) != 0)
+ return;
+ /* FIXME: make this more reliable when specs are out */
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
+ }
+}
+
+/*** kate ***/
+static void
+kate_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 64);
+ gchar category[16] = { 0, };
+
+ if (G_UNLIKELY (data == NULL))
+ return;
+
+ /* see: http://wiki.xiph.org/index.php/OggKate#Format_specification */
+ if (G_LIKELY (memcmp (data, "\200kate\0\0\0", 8) != 0))
+ return;
+
+ /* make sure we always have a NUL-terminated string */
+ memcpy (category, data + 48, 15);
+ GST_LOG ("kate category: %s", category);
+ /* canonical categories for subtitles: subtitles, spu-subtitles, SUB, K-SPU */
+ if (strcmp (category, "subtitles") == 0 || strcmp (category, "SUB") == 0 ||
+ strcmp (category, "spu-subtitles") == 0 ||
+ strcmp (category, "K-SPU") == 0) {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ "subtitle/x-kate", NULL);
+ } else {
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
+ "application/x-kate", NULL);
+ }
+}
+
+/*** application/x-ogm-video or audio***/
+
+static GstStaticCaps ogmvideo_caps =
+GST_STATIC_CAPS ("application/x-ogm-video");
+#define OGMVIDEO_CAPS (gst_static_caps_get(&ogmvideo_caps))
+static void
+ogmvideo_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 9);
+
+ if (data) {
+ if (memcmp (data, "\001video\000\000\000", 9) != 0)
+ return;
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMVIDEO_CAPS);
+ }
+}
+
+static GstStaticCaps ogmaudio_caps =
+GST_STATIC_CAPS ("application/x-ogm-audio");
+#define OGMAUDIO_CAPS (gst_static_caps_get(&ogmaudio_caps))
+static void
+ogmaudio_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 9);
+
+ if (data) {
+ if (memcmp (data, "\001audio\000\000\000", 9) != 0)
+ return;
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMAUDIO_CAPS);
+ }
+}
+
+static GstStaticCaps ogmtext_caps = GST_STATIC_CAPS ("application/x-ogm-text");
+
+#define OGMTEXT_CAPS (gst_static_caps_get(&ogmtext_caps))
+static void
+ogmtext_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 9);
+
+ if (data) {
+ if (memcmp (data, "\001text\000\000\000\000", 9) != 0)
+ return;
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMTEXT_CAPS);
+ }
+}
+
+/*** audio/x-speex ***/
+
+static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
+
+#define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
+static void
+speex_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 80);
+
+ if (data) {
+ /* 8 byte string "Speex "
+ 24 byte speex version string + int */
+ if (memcmp (data, "Speex ", 8) != 0)
+ return;
+ data += 32;
+
+ /* 4 byte header size >= 80 */
+ if (GST_READ_UINT32_LE (data) < 80)
+ return;
+ data += 4;
+
+ /* 4 byte sample rate <= 48000 */
+ if (GST_READ_UINT32_LE (data) > 48000)
+ return;
+ data += 4;
+
+ /* currently there are only 3 speex modes. */
+ if (GST_READ_UINT32_LE (data) > 3)
+ return;
+ data += 12;
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
+ }
+}
+
+/*** audio/x-celt ***/
+
+static GstStaticCaps celt_caps = GST_STATIC_CAPS ("audio/x-celt");
+
+#define CELT_CAPS (gst_static_caps_get(&celt_caps))
+static void
+celt_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 8);
+
+ if (data) {
+ /* 8 byte string "CELT " */
+ if (memcmp (data, "CELT ", 8) != 0)
+ return;
+
+ /* TODO: Check other values of the CELT header */
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CELT_CAPS);
+ }
+}
+
+/*** application/x-ogg-skeleton ***/
+static GstStaticCaps ogg_skeleton_caps =
+GST_STATIC_CAPS ("application/x-ogg-skeleton, parsed=(boolean)FALSE");
+#define OGG_SKELETON_CAPS (gst_static_caps_get(&ogg_skeleton_caps))
+static void
+oggskel_type_find (GstTypeFind * tf, gpointer private)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 12);
+
+ if (data) {
+ /* 8 byte string "fishead\0" for the ogg skeleton stream */
+ if (memcmp (data, "fishead\0", 8) != 0)
+ return;
+ data += 8;
+
+ /* Require that the header contains version 3.0 */
+ if (GST_READ_UINT16_LE (data) != 3)
+ return;
+ data += 2;
+ if (GST_READ_UINT16_LE (data) != 0)
+ return;
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGG_SKELETON_CAPS);
+ }
+}
+
+static GstStaticCaps cmml_caps = GST_STATIC_CAPS ("text/x-cmml");
+
+#define CMML_CAPS (gst_static_caps_get(&cmml_caps))
+static void
+cmml_type_find (GstTypeFind * tf, gpointer private)
+{
+ /* Header is 12 bytes minimum (though we don't check the minor version */
+ guint8 *data = gst_type_find_peek (tf, 0, 12);
+
+ if (data) {
+
+ /* 8 byte string "CMML\0\0\0\0" for the magic number */
+ if (memcmp (data, "CMML\0\0\0\0", 8) != 0)
+ return;
+ data += 8;
+
+ /* Require that the header contains at least version 2.0 */
+ if (GST_READ_UINT16_LE (data) < 2)
+ return;
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS);
+ }
+}
+
+/*** application/x-tar ***/
+
+static GstStaticCaps tar_caps = GST_STATIC_CAPS ("application/x-tar");
+
+#define TAR_CAPS (gst_static_caps_get(&tar_caps))
+#define OLDGNU_MAGIC "ustar " /* 7 chars and a NUL */
+#define NEWGNU_MAGIC "ustar" /* 5 chars and a NUL */
+static void
+tar_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 257, 8);
+
+ /* of course we are not certain, but we don't want other typefind funcs
+ * to detect formats of files within the tar archive, e.g. mp3s */
+ if (data) {
+ if (memcmp (data, OLDGNU_MAGIC, 8) == 0) { /* sic */
+ gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
+ } else if (memcmp (data, NEWGNU_MAGIC, 6) == 0 && /* sic */
+ g_ascii_isdigit (data[6]) && g_ascii_isdigit (data[7])) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
+ }
+ }
+}
+
+/*** application/x-ar ***/
+
+static GstStaticCaps ar_caps = GST_STATIC_CAPS ("application/x-ar");
+
+#define AR_CAPS (gst_static_caps_get(&ar_caps))
+static void
+ar_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 24);
+
+ if (data && memcmp (data, "!<arch>", 7) == 0) {
+ gint i;
+
+ for (i = 7; i < 24; ++i) {
+ if (!g_ascii_isprint (data[i]) && data[i] != '\n') {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AR_CAPS);
+ }
+ }
+
+ gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, AR_CAPS);
+ }
+}
+
+/*** audio/x-au ***/
+
+/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
+ * as it is only possible to register one typefind factory per 'name'
+ * (which is in this case the caps), and the first one would be replaced by
+ * the second one. */
+static GstStaticCaps au_caps = GST_STATIC_CAPS ("audio/x-au");
+
+#define AU_CAPS (gst_static_caps_get(&au_caps))
+static void
+au_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data) {
+ if (memcmp (data, ".snd", 4) == 0 || memcmp (data, "dns.", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AU_CAPS);
+ }
+ }
+}
+
+
+/*** video/x-nuv ***/
+
+/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
+ * as it is only possible to register one typefind factory per 'name'
+ * (which is in this case the caps), and the first one would be replaced by
+ * the second one. */
+static GstStaticCaps nuv_caps = GST_STATIC_CAPS ("video/x-nuv");
+
+#define NUV_CAPS (gst_static_caps_get(&nuv_caps))
+static void
+nuv_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 11);
+
+ if (data) {
+ if (memcmp (data, "MythTVVideo", 11) == 0
+ || memcmp (data, "NuppelVideo", 11) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, NUV_CAPS);
+ }
+ }
+}
+
+/*** audio/x-paris ***/
+/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
+static GstStaticCaps paris_caps = GST_STATIC_CAPS ("audio/x-paris");
+
+#define PARIS_CAPS (gst_static_caps_get(&paris_caps))
+static void
+paris_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+ if (data) {
+ if (memcmp (data, " paf", 4) == 0 || memcmp (data, "fap ", 4) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, PARIS_CAPS);
+ }
+ }
+}
+
+/*** audio/iLBC-sh ***/
+/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
+static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
+
+#define ILBC_CAPS (gst_static_caps_get(&ilbc_caps))
+static void
+ilbc_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 8);
+
+ if (data) {
+ if (memcmp (data, "#!iLBC30", 8) == 0 || memcmp (data, "#!iLBC20", 8) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, ILBC_CAPS);
+ }
+ }
+}
+
+/*** application/x-ms-dos-executable ***/
+
+static GstStaticCaps msdos_caps =
+GST_STATIC_CAPS ("application/x-ms-dos-executable");
+#define MSDOS_CAPS (gst_static_caps_get(&msdos_caps))
+/* see http://www.madchat.org/vxdevl/papers/winsys/pefile/pefile.htm */
+static void
+msdos_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 64);
+
+ if (data && data[0] == 'M' && data[1] == 'Z' &&
+ GST_READ_UINT16_LE (data + 8) == 4) {
+ guint32 pe_offset = GST_READ_UINT32_LE (data + 60);
+
+ data = gst_type_find_peek (tf, pe_offset, 2);
+ if (data && data[0] == 'P' && data[1] == 'E') {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, MSDOS_CAPS);
+ }
+ }
+}
+
+/*** application/x-mmsh ***/
+
+static GstStaticCaps mmsh_caps = GST_STATIC_CAPS ("application/x-mmsh");
+
+#define MMSH_CAPS gst_static_caps_get(&mmsh_caps)
+
+/* This is to recognise mssh-over-http */
+static void
+mmsh_type_find (GstTypeFind * tf, gpointer unused)
+{
+ static const guint8 asf_marker[16] = { 0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66,
+ 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
+ };
+
+ guint8 *data;
+
+ data = gst_type_find_peek (tf, 0, 2 + 2 + 4 + 2 + 2 + 16);
+ if (data && data[0] == 0x24 && data[1] == 0x48 &&
+ GST_READ_UINT16_LE (data + 2) > 2 + 2 + 4 + 2 + 2 + 16 &&
+ memcmp (data + 2 + 2 + 4 + 2 + 2, asf_marker, 16) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MMSH_CAPS);
+ }
+}
+
+/*** video/x-dirac ***/
+
+/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
+ * as it is only possible to register one typefind factory per 'name'
+ * (which is in this case the caps), and the first one would be replaced by
+ * the second one. */
+static GstStaticCaps dirac_caps = GST_STATIC_CAPS ("video/x-dirac");
+
+#define DIRAC_CAPS (gst_static_caps_get(&dirac_caps))
+static void
+dirac_type_find (GstTypeFind * tf, gpointer unused)
+{
+ guint8 *data = gst_type_find_peek (tf, 0, 8);
+
+ if (data) {
+ if (memcmp (data, "BBCD", 4) == 0 || memcmp (data, "KW-DIRAC", 8) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, DIRAC_CAPS);
+ }
+ }
+}
+
+/*** video/vivo ***/
+
+static GstStaticCaps vivo_caps = GST_STATIC_CAPS ("video/vivo");
+
+#define VIVO_CAPS gst_static_caps_get(&vivo_caps)
+
+static void
+vivo_type_find (GstTypeFind * tf, gpointer unused)
+{
+ static const guint8 vivo_marker[] = { 'V', 'e', 'r', 's', 'i', 'o', 'n',
+ ':', 'V', 'i', 'v', 'o', '/'
+ };
+ guint8 *data;
+ guint hdr_len, pos;
+
+ data = gst_type_find_peek (tf, 0, 1024);
+ if (data == NULL || data[0] != 0x00)
+ return;
+
+ if ((data[1] & 0x80)) {
+ if ((data[2] & 0x80))
+ return;
+ hdr_len = ((guint) (data[1] & 0x7f)) << 7;
+ hdr_len += data[2];
+ if (hdr_len > 2048)
+ return;
+ pos = 3;
+ } else {
+ hdr_len = data[1];
+ pos = 2;
+ }
+
+ /* 1008 = 1022 - strlen ("Version:Vivo/") - 1 */
+ while (pos < 1008 && data[pos] == '\r' && data[pos + 1] == '\n')
+ pos += 2;
+
+ if (memcmp (data + pos, vivo_marker, sizeof (vivo_marker)) == 0) {
+ gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VIVO_CAPS);
+ }
+}
+
+/*** XDG MIME typefinder (to avoid false positives mostly) ***/
+
+#ifdef USE_GIO
+static void
+xdgmime_typefind (GstTypeFind * find, gpointer user_data)
+{
+ gchar *mimetype;
+ gsize length = 16384;
+ guint64 tf_length;
+ guint8 *data;
+ gchar *tmp;
+
+ if ((tf_length = gst_type_find_get_length (find)) > 0)
+ length = MIN (length, tf_length);
+
+ if ((data = gst_type_find_peek (find, 0, length)) == NULL)
+ return;
+
+ tmp = g_content_type_guess (NULL, data, length, NULL);
+ if (tmp == NULL || g_content_type_is_unknown (tmp)) {
+ g_free (tmp);
+ return;
+ }
+
+ mimetype = g_content_type_get_mime_type (tmp);
+ g_free (tmp);
+
+ if (mimetype == NULL)
+ return;
+
+ GST_DEBUG ("Got mimetype '%s'", mimetype);
+
+ /* Ignore audio/video types:
+ * - our own typefinders in -base are likely to be better at this
+ * (and if they're not, we really want to fix them, that's why we don't
+ * report xdg-detected audio/video types at all, not even with a low
+ * probability)
+ * - we want to detect GStreamer media types and not MIME types
+ * - the purpose of this xdg mime finder is mainly to prevent false
+ * positives of non-media formats, not to typefind audio/video formats */
+ if (g_str_has_prefix (mimetype, "audio/") ||
+ g_str_has_prefix (mimetype, "video/")) {
+ GST_LOG ("Ignoring audio/video mime type");
+ g_free (mimetype);
+ return;
+ }
+
+ /* Again, we mainly want the xdg typefinding to prevent false-positives on
+ * non-media formats, so suggest the type with a probability that trumps
+ * uncertain results of our typefinders, but not more than that. */
+ GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype);
+ gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL);
+ g_free (mimetype);
+}
+#endif /* USE_GIO */
+
+/*** Windows icon typefinder (to avoid false positives mostly) ***/
+
+static void
+windows_icon_typefind (GstTypeFind * find, gpointer user_data)
+{
+ guint8 *data;
+ gint64 datalen;
+ guint16 type, nimages;
+ gint32 size, offset;
+
+ datalen = gst_type_find_get_length (find);
+ if ((data = gst_type_find_peek (find, 0, 6)) == NULL)
+ return;
+
+ /* header - simple and not enough to rely on it alone */
+ if (GST_READ_UINT16_LE (data) != 0)
+ return;
+ type = GST_READ_UINT16_LE (data + 2);
+ if (type != 1 && type != 2)
+ return;
+ nimages = GST_READ_UINT16_LE (data + 4);
+ if (nimages == 0) /* we can assume we can't have an empty image file ? */
+ return;
+
+ /* first image */
+ if (data[6 + 3] != 0)
+ return;
+ if (type == 1) {
+ guint16 planes = GST_READ_UINT16_LE (data + 6 + 4);
+ if (planes > 1)
+ return;
+ }
+ size = GST_READ_UINT32_LE (data + 6 + 8);
+ offset = GST_READ_UINT32_LE (data + 6 + 12);
+ if (offset < 0 || size <= 0 || size >= datalen || offset >= datalen
+ || size + offset > datalen)
+ return;
+
+ gst_type_find_suggest_simple (find, GST_TYPE_FIND_NEARLY_CERTAIN,
+ "image/x-icon", NULL);
+}
+
+
+/*** DEGAS Atari images (also to avoid false positives, see #625129) ***/
+static void
+degas_type_find (GstTypeFind * tf, gpointer private)
+{
+ /* No magic, but it should have a fixed size and a few invalid values */
+ /* http://www.fileformat.info/format/atari/spec/6ecf9f6eb5be494284a47feb8a214687/view.htm */
+ gint64 len;
+ const guint8 *data;
+ guint16 resolution;
+ int n;
+
+ len = gst_type_find_get_length (tf);
+ if (len < 34) /* smallest header of the lot */
+ return;
+ data = gst_type_find_peek (tf, 0, 4);
+ resolution = GST_READ_UINT16_BE (data);
+ if (len == 32034) {
+ /* could be DEGAS */
+ if (resolution <= 2)
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
+ "image/x-degas", NULL);
+ } else if (len == 32066) {
+ /* could be DEGAS Elite */
+ if (resolution <= 2) {
+ data = gst_type_find_peek (tf, len - 16, 8);
+ for (n = 0; n < 4; n++) {
+ if (GST_READ_UINT16_BE (data + n * 2) > 2)
+ return;
+ }
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
+ "image/x-degas", NULL);
+ }
+ } else if (len >= 66 && len < 32066) {
+ /* could be compressed DEGAS Elite, but it's compressed and so we can't rely on size,
+ it does have 4 16 bytes values near the end that are 0-2 though. */
+ if ((resolution & 0x8000) && (resolution & 0x7fff) <= 2) {
+ data = gst_type_find_peek (tf, len - 16, 8);
+ for (n = 0; n < 4; n++) {
+ if (GST_READ_UINT16_BE (data + n * 2) > 2)
+ return;
+ }
+ gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
+ "image/x-degas", NULL);
+ }
+ }
+}
+
+/*** generic typefind for streams that have some data at a specific position***/
+typedef struct
+{
+ const guint8 *data;
+ guint size;
+ guint probability;
+ GstCaps *caps;
+}
+GstTypeFindData;
+
+static void
+start_with_type_find (GstTypeFind * tf, gpointer private)
+{
+ GstTypeFindData *start_with = (GstTypeFindData *) private;
+ guint8 *data;
+
+ GST_LOG ("trying to find mime type %s with the first %u bytes of data",
+ gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
+ start_with->size);
+ data = gst_type_find_peek (tf, 0, start_with->size);
+ if (data && memcmp (data, start_with->data, start_with->size) == 0) {
+ gst_type_find_suggest (tf, start_with->probability, start_with->caps);
+ }
+}
+
+static void
+sw_data_destroy (GstTypeFindData * sw_data)
+{
+ if (G_LIKELY (sw_data->caps != NULL))
+ gst_caps_unref (sw_data->caps);
+ g_free (sw_data);
+}
+
+#define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
+G_BEGIN_DECLS{ \
+ GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
+ sw_data->data = (const guint8 *)_data; \
+ sw_data->size = _size; \
+ sw_data->probability = _probability; \
+ sw_data->caps = gst_caps_new_simple (name, NULL); \
+ if (!gst_type_find_register (plugin, name, rank, start_with_type_find,\
+ (char **) ext, sw_data->caps, sw_data, \
+ (GDestroyNotify) (sw_data_destroy))) { \
+ gst_caps_unref (sw_data->caps); \
+ g_free (sw_data); \
+ } \
+}G_END_DECLS
+
+/*** same for riff types ***/
+
+static void
+riff_type_find (GstTypeFind * tf, gpointer private)
+{
+ GstTypeFindData *riff_data = (GstTypeFindData *) private;
+ guint8 *data = gst_type_find_peek (tf, 0, 12);
+
+ if (data && (memcmp (data, "RIFF", 4) == 0 || memcmp (data, "AVF0", 4) == 0)) {
+ data += 8;
+ if (memcmp (data, riff_data->data, 4) == 0)
+ gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
+ }
+}
+
+#define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
+G_BEGIN_DECLS{ \
+ GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
+ sw_data->data = (gpointer)_data; \
+ sw_data->size = 4; \
+ sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
+ sw_data->caps = gst_caps_new_simple (name, NULL); \
+ if (!gst_type_find_register (plugin, name, rank, riff_type_find, \
+ (char **) ext, sw_data->caps, sw_data, \
+ (GDestroyNotify) (sw_data_destroy))) { \
+ gst_caps_unref (sw_data->caps); \
+ g_free (sw_data); \
+ } \
+}G_END_DECLS
+
+
+/*** plugin initialization ***/
+
+#define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv,notify) \
+G_BEGIN_DECLS{\
+ if (!gst_type_find_register (plugin, name, rank, func, (char **) ext, caps, priv, notify))\
+ return FALSE; \
+}G_END_DECLS
+
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ /* can't initialize this via a struct as caps can't be statically initialized */
+
+ /* note: asx/wax/wmx are XML files, asf doesn't handle them */
+ /* FIXME-0.11: these should be const,
+ this requires gstreamer/gst/gsttypefind::gst_type_find_register()
+ to have define the parameter as const
+ */
+ static const gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL };
+ static const gchar *au_exts[] = { "au", "snd", NULL };
+ static const gchar *avi_exts[] = { "avi", NULL };
+ static const gchar *qcp_exts[] = { "qcp", NULL };
+ static const gchar *cdxa_exts[] = { "dat", NULL };
+ static const gchar *flac_exts[] = { "flac", NULL };
+ static const gchar *flx_exts[] = { "flc", "fli", NULL };
+ static const gchar *id3_exts[] =
+ { "mp3", "mp2", "mp1", "mpga", "ogg", "flac", "tta", NULL };
+ static const gchar *apetag_exts[] = { "mp3", "ape", "mpc", "wv", NULL };
+ static const gchar *tta_exts[] = { "tta", NULL };
+ static const gchar *mod_exts[] = { "669", "amf", "dsm", "gdm", "far", "imf",
+ "it", "med", "mod", "mtm", "okt", "sam",
+ "s3m", "stm", "stx", "ult", "xm", NULL
+ };
+ static const gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL };
+ static const gchar *ac3_exts[] = { "ac3", "eac3", NULL };
+ static const gchar *dts_exts[] = { "dts", NULL };
+ static const gchar *gsm_exts[] = { "gsm", NULL };
+ static const gchar *musepack_exts[] = { "mpc", "mpp", "mp+", NULL };
+ static const gchar *mpeg_sys_exts[] = { "mpe", "mpeg", "mpg", NULL };
+ static const gchar *mpeg_video_exts[] = { "mpv", "mpeg", "mpg", NULL };
+ static const gchar *mpeg_ts_exts[] = { "ts", "mts", NULL };
+ static const gchar *ogg_exts[] = { "anx", "ogg", "ogm", NULL };
+ static const gchar *qt_exts[] = { "mov", NULL };
+ static const gchar *qtif_exts[] = { "qif", "qtif", "qti", NULL };
+ static const gchar *mj2_exts[] = { "mj2", NULL };
+ static const gchar *jp2_exts[] = { "jp2", NULL };
+ static const gchar *rm_exts[] = { "ra", "ram", "rm", "rmvb", NULL };
+ static const gchar *swf_exts[] = { "swf", "swfl", NULL };
+ static const gchar *utf8_exts[] = { "txt", NULL };
+ static const gchar *wav_exts[] = { "wav", NULL };
+ static const gchar *aiff_exts[] = { "aiff", "aif", "aifc", NULL };
+ static const gchar *svx_exts[] = { "iff", "svx", NULL };
+ static const gchar *paris_exts[] = { "paf", NULL };
+ static const gchar *nist_exts[] = { "nist", NULL };
+ static const gchar *voc_exts[] = { "voc", NULL };
+ static const gchar *sds_exts[] = { "sds", NULL };
+ static const gchar *ircam_exts[] = { "sf", NULL };
+ static const gchar *w64_exts[] = { "w64", NULL };
+ static const gchar *shn_exts[] = { "shn", NULL };
+ static const gchar *ape_exts[] = { "ape", NULL };
+ static const gchar *uri_exts[] = { "ram", NULL };
+ static const gchar *hls_exts[] = { "m3u8", NULL };
+ static const gchar *sdp_exts[] = { "sdp", NULL };
+ static const gchar *smil_exts[] = { "smil", NULL };
+ static const gchar *html_exts[] = { "htm", "html", NULL };
+ static const gchar *xml_exts[] = { "xml", NULL };
+ static const gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
+ static const gchar *gif_exts[] = { "gif", NULL };
+ static const gchar *png_exts[] = { "png", NULL };
+ static const gchar *bmp_exts[] = { "bmp", NULL };
+ static const gchar *tiff_exts[] = { "tif", "tiff", NULL };
+ static const gchar *matroska_exts[] = { "mkv", "mka", NULL };
+ static const gchar *webm_exts[] = { "webm", NULL };
+ static const gchar *mve_exts[] = { "mve", NULL };
+ static const gchar *dv_exts[] = { "dv", "dif", NULL };
+ static const gchar *amr_exts[] = { "amr", NULL };
+ static const gchar *ilbc_exts[] = { "ilbc", NULL };
+ static const gchar *sid_exts[] = { "sid", NULL };
+ static const gchar *xcf_exts[] = { "xcf", NULL };
+ static const gchar *mng_exts[] = { "mng", NULL };
+ static const gchar *jng_exts[] = { "jng", NULL };
+ static const gchar *xpm_exts[] = { "xpm", NULL };
+ static const gchar *pnm_exts[] = { "pnm", "ppm", "pgm", "pbm", NULL };
+ static const gchar *ras_exts[] = { "ras", NULL };
+ static const gchar *bz2_exts[] = { "bz2", NULL };
+ static const gchar *gz_exts[] = { "gz", NULL };
+ static const gchar *zip_exts[] = { "zip", NULL };
+ static const gchar *compress_exts[] = { "Z", NULL };
+ static const gchar *m4a_exts[] = { "m4a", NULL };
+ static const gchar *q3gp_exts[] = { "3gp", NULL };
+ static const gchar *aac_exts[] = { "aac", "adts", "adif", "loas", NULL };
+ static const gchar *spc_exts[] = { "spc", NULL };
+ static const gchar *wavpack_exts[] = { "wv", "wvp", NULL };
+ static const gchar *wavpack_correction_exts[] = { "wvc", NULL };
+ static const gchar *rar_exts[] = { "rar", NULL };
+ static const gchar *tar_exts[] = { "tar", NULL };
+ static const gchar *ar_exts[] = { "a", NULL };
+ static const gchar *msdos_exts[] = { "dll", "exe", "ocx", "sys", "scr",
+ "msstyles", "cpl", NULL
+ };
+ static const gchar *flv_exts[] = { "flv", NULL };
+ static const gchar *m4v_exts[] = { "m4v", NULL };
+ static const gchar *h263_exts[] = { "h263", "263", NULL };
+ static const gchar *h264_exts[] = { "h264", "x264", "264", NULL };
+ static const gchar *nuv_exts[] = { "nuv", NULL };
+ static const gchar *vivo_exts[] = { "viv", NULL };
+ static const gchar *nsf_exts[] = { "nsf", NULL };
+ static const gchar *gym_exts[] = { "gym", NULL };
+ static const gchar *ay_exts[] = { "ay", NULL };
+ static const gchar *gbs_exts[] = { "gbs", NULL };
+ static const gchar *kss_exts[] = { "kss", NULL };
+ static const gchar *sap_exts[] = { "sap", NULL };
+ static const gchar *vgm_exts[] = { "vgm", NULL };
+ static const gchar *mid_exts[] = { "mid", "midi", NULL };
+ static const gchar *mxmf_exts[] = { "mxmf", NULL };
+ static const gchar *imelody_exts[] = { "imy", "ime", "imelody", NULL };
+ static const gchar *pdf_exts[] = { "pdf", NULL };
+ static const gchar *ps_exts[] = { "ps", NULL };
+ static const gchar *svg_exts[] = { "svg", NULL };
+ static const gchar *mxf_exts[] = { "mxf", NULL };
+ static const gchar *ivf_exts[] = { "ivf", NULL };
+ static const gchar *msword_exts[] = { "doc", NULL };
+ static const gchar *dsstore_exts[] = { "DS_Store", NULL };
+ static const gchar *psd_exts[] = { "psd", NULL };
+ static const gchar *y4m_exts[] = { "y4m", NULL };
+
+ GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
+ GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
+
+ /* must use strings, macros don't accept initializers */
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
+ asf_exts,
+ "\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
+ GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/x-musepack", GST_RANK_PRIMARY,
+ musepack_type_find, musepack_exts, MUSEPACK_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-au", GST_RANK_MARGINAL,
+ au_type_find, au_exts, AU_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
+ avi_exts, "AVI ");
+ TYPE_FIND_REGISTER_RIFF (plugin, "audio/qcelp", GST_RANK_PRIMARY,
+ qcp_exts, "QLCM");
+ TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_PRIMARY,
+ cdxa_exts, "CDXA");
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-vcd", GST_RANK_PRIMARY,
+ cdxa_exts, "\000\377\377\377\377\377\377\377\377\377\377\000", 12,
+ GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-imelody", GST_RANK_PRIMARY,
+ imelody_exts, "BEGIN:IMELODY", 13, GST_TYPE_FIND_MAXIMUM);
+#if 0
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-smoke", GST_RANK_PRIMARY,
+ NULL, "\x80smoke\x00\x01\x00", 6, GST_TYPE_FIND_MAXIMUM);
+#endif
+ TYPE_FIND_REGISTER (plugin, "audio/midi", GST_RANK_PRIMARY, mid_type_find,
+ mid_exts, MID_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_RIFF (plugin, "audio/riff-midi", GST_RANK_PRIMARY,
+ mid_exts, "RMID");
+ TYPE_FIND_REGISTER (plugin, "audio/mobile-xmf", GST_RANK_PRIMARY,
+ mxmf_type_find, mxmf_exts, MXMF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
+ flx_exts, FLX_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-id3v2", GST_RANK_PRIMARY + 103,
+ id3v2_type_find, id3_exts, ID3_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-id3v1", GST_RANK_PRIMARY + 101,
+ id3v1_type_find, id3_exts, ID3_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY + 102,
+ apetag_type_find, apetag_exts, APETAG_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY,
+ tta_type_find, tta_exts, TTA_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
+ mod_exts, MOD_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
+ mp3_exts, MP3_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find,
+ ac3_exts, AC3_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-dts", GST_RANK_SECONDARY, dts_type_find,
+ dts_exts, DTS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-gsm", GST_RANK_PRIMARY, NULL, gsm_exts,
+ GSM_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/mpeg-sys", GST_RANK_PRIMARY,
+ mpeg_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/mpegts", GST_RANK_PRIMARY,
+ mpeg_ts_type_find, mpeg_ts_exts, MPEGTS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY,
+ ogganx_type_find, ogg_exts, OGGANX_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/mpeg-elementary", GST_RANK_MARGINAL,
+ mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL,
+ NULL);
+ TYPE_FIND_REGISTER (plugin, "video/mpeg4", GST_RANK_PRIMARY,
+ mpeg4_video_type_find, m4v_exts, MPEG_VIDEO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-h263", GST_RANK_SECONDARY,
+ h263_video_type_find, h263_exts, H263_VIDEO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-h264", GST_RANK_PRIMARY,
+ h264_video_type_find, h264_exts, H264_VIDEO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-nuv", GST_RANK_SECONDARY, nuv_type_find,
+ nuv_exts, NUV_CAPS, NULL, NULL);
+
+ /* ISO formats */
+ TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
+ m4a_exts, M4A_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
+ q3gp_type_find, q3gp_exts, Q3GP_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
+ qt_type_find, qt_exts, QT_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/x-quicktime", GST_RANK_SECONDARY,
+ qtif_type_find, qtif_exts, QTIF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/jp2", GST_RANK_PRIMARY,
+ jp2_type_find, jp2_exts, JP2_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/mj2", GST_RANK_PRIMARY,
+ jp2_type_find, mj2_exts, MJ2_CAPS, NULL, NULL);
+
+ TYPE_FIND_REGISTER (plugin, "text/html", GST_RANK_SECONDARY, html_type_find,
+ html_exts, HTML_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
+ GST_RANK_SECONDARY, rm_exts, ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-pn-realaudio",
+ GST_RANK_SECONDARY, rm_exts, ".ra\375", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
+ GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-flv", GST_RANK_SECONDARY,
+ flv_exts, "FLV", 3, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
+ utf8_exts, UTF8_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
+ uri_exts, URI_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-hls", GST_RANK_MARGINAL,
+ hls_type_find, hls_exts, HLS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/sdp", GST_RANK_SECONDARY,
+ sdp_type_find, sdp_exts, SDP_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
+ smil_type_find, smil_exts, SMIL_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
+ xml_type_find, xml_exts, GENERIC_XML_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
+ "WAVE");
+ TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
+ aiff_type_find, aiff_exts, AIFF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
+ svx_exts, SVX_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-paris", GST_RANK_SECONDARY,
+ paris_type_find, paris_exts, PARIS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
+ nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
+ voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
+ sds_exts, SDS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
+ ircam_type_find, ircam_exts, IRCAM_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
+ w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
+ shn_type_find, shn_exts, SHN_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
+ ape_type_find, ape_exts, APE_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY + 15,
+ jpeg_type_find, jpeg_exts, JPEG_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY,
+ gif_exts, "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY + 14,
+ png_exts, "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
+ bmp_exts, BMP_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
+ tiff_exts, TIFF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/x-portable-pixmap", GST_RANK_SECONDARY,
+ pnm_type_find, pnm_exts, PNM_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
+ matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/webm", GST_RANK_PRIMARY,
+ webm_type_find, webm_exts, WEBM_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/mxf", GST_RANK_PRIMARY,
+ mxf_type_find, mxf_exts, MXF_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
+ mve_exts, "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
+ GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
+ dv_exts, DV_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-nb-sh", GST_RANK_PRIMARY,
+ amr_exts, "#!AMR", 5, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-wb-sh", GST_RANK_PRIMARY,
+ amr_exts, "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY,
+ ilbc_type_find, ilbc_exts, ILBC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
+ sid_exts, "PSID", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
+ xcf_exts, "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
+ mng_exts, "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
+ jng_exts, "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
+ xpm_exts, "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
+ GST_RANK_SECONDARY, ras_exts, "\131\246\152\225", 4,
+ GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
+ GST_RANK_SECONDARY, bz2_exts, "BZh", 3, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
+ GST_RANK_SECONDARY, gz_exts, "\037\213", 2, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
+ zip_exts, "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
+ GST_RANK_SECONDARY, compress_exts, "\037\235", 2, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER (plugin, "subtitle/x-kate", GST_RANK_MARGINAL,
+ kate_type_find, NULL, NULL, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-flac", GST_RANK_PRIMARY,
+ flac_type_find, flac_exts, FLAC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
+ vorbis_type_find, NULL, VORBIS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
+ theora_type_find, NULL, THEORA_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY,
+ ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY,
+ ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY,
+ ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
+ speex_type_find, NULL, SPEEX_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-celt", GST_RANK_PRIMARY,
+ celt_type_find, NULL, CELT_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
+ oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
+ NULL, CMML_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-executable",
+ GST_RANK_MARGINAL, NULL, "\177ELF", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/aac", GST_RANK_SECONDARY,
+ aac_type_find, aac_exts, AAC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-spc", GST_RANK_SECONDARY,
+ spc_exts, "SNES-SPC700 Sound File Data", 27, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
+ wavpack_type_find, wavpack_exts, WAVPACK_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
+ wavpack_type_find, wavpack_correction_exts, WAVPACK_CORRECTION_CAPS, NULL,
+ NULL);
+ TYPE_FIND_REGISTER (plugin, "application/postscript", GST_RANK_SECONDARY,
+ postscript_type_find, ps_exts, POSTSCRIPT_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "image/svg+xml", GST_RANK_SECONDARY,
+ svg_type_find, svg_exts, SVG_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
+ GST_RANK_SECONDARY, rar_exts, "Rar!", 4, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,
+ tar_type_find, tar_exts, TAR_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ar", GST_RANK_SECONDARY,
+ ar_type_find, ar_exts, AR_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-ms-dos-executable",
+ GST_RANK_SECONDARY, msdos_type_find, msdos_exts, MSDOS_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/x-dirac", GST_RANK_PRIMARY,
+ dirac_type_find, NULL, DIRAC_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "multipart/x-mixed-replace", GST_RANK_SECONDARY,
+ multipart_type_find, NULL, MULTIPART_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "application/x-mmsh", GST_RANK_SECONDARY,
+ mmsh_type_find, NULL, MMSH_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER (plugin, "video/vivo", GST_RANK_SECONDARY,
+ vivo_type_find, vivo_exts, VIVO_CAPS, NULL, NULL);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nsf",
+ GST_RANK_SECONDARY, nsf_exts, "NESM\x1a", 5, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gym",
+ GST_RANK_SECONDARY, gym_exts, "GYMX", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-ay",
+ GST_RANK_SECONDARY, ay_exts, "ZXAYEMUL", 8, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gbs",
+ GST_RANK_SECONDARY, gbs_exts, "GBS\x01", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-vgm",
+ GST_RANK_SECONDARY, vgm_exts, "Vgm\x20", 4, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sap",
+ GST_RANK_SECONDARY, sap_exts, "SAP\x0d\x0aAUTHOR\x20", 12,
+ GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ivf", GST_RANK_SECONDARY,
+ ivf_exts, "DKIF", 4, GST_TYPE_FIND_NEARLY_CERTAIN);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-kss", GST_RANK_SECONDARY,
+ kss_exts, "KSSX\0", 5, GST_TYPE_FIND_MAXIMUM);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/pdf", GST_RANK_SECONDARY,
+ pdf_exts, "%PDF-", 5, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/msword",
+ GST_RANK_SECONDARY, msword_exts, "\320\317\021\340\241\261\032\341", 8,
+ GST_TYPE_FIND_LIKELY);
+ /* Mac OS X .DS_Store files tend to be taken for video/mpeg */
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/octet-stream",
+ GST_RANK_SECONDARY, dsstore_exts, "\000\000\000\001Bud1", 8,
+ GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "image/vnd.adobe.photoshop",
+ GST_RANK_SECONDARY, psd_exts, "8BPS\000\001\000\000\000\000", 10,
+ GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-yuv4mpeg",
+ GST_RANK_SECONDARY, y4m_exts, "YUV4MPEG2 ", 10, GST_TYPE_FIND_LIKELY);
+ TYPE_FIND_REGISTER (plugin, "image/x-icon", GST_RANK_MARGINAL,
+ windows_icon_typefind, NULL, NULL, NULL, NULL);
+
+#ifdef USE_GIO
+ TYPE_FIND_REGISTER (plugin, "xdgmime-base", GST_RANK_MARGINAL,
+ xdgmime_typefind, NULL, NULL, NULL, NULL);
+#endif
+
+ TYPE_FIND_REGISTER (plugin, "image/x-degas", GST_RANK_MARGINAL,
+ degas_type_find, NULL, NULL, NULL, NULL);
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "typefindfunctions",
+ "default typefind functions",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / mafwsubrenderer / blobdiff