X-Git-Url: https://vcs.maemo.org/git/?a=blobdiff_plain;f=gst-plugins-base-subtitles0.10%2Fext%2Fogg%2Fdirac_parse.c;fp=gst-plugins-base-subtitles0.10%2Fext%2Fogg%2Fdirac_parse.c;h=3a3193d9258694c0beb610d2d546a910e209a68d;hb=57ba96e291a055f69dbfd4ae9f1ae2390e36986e;hp=0000000000000000000000000000000000000000;hpb=be2c98fb83895d10ac44af7b9a9c3e00ca54bf49;p=mafwsubrenderer

diff --git a/gst-plugins-base-subtitles0.10/ext/ogg/dirac_parse.c b/gst-plugins-base-subtitles0.10/ext/ogg/dirac_parse.c
new file mode 100644
index 0000000..3a3193d
--- /dev/null
+++ b/gst-plugins-base-subtitles0.10/ext/ogg/dirac_parse.c
@@ -0,0 +1,498 @@
+
+#include "dirac_parse.h"
+#include <string.h>
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+typedef struct _Unpack Unpack;
+
+struct _Unpack
+{
+  unsigned char *data;
+  int n_bits_left;
+  int index;
+  int guard_bit;
+};
+
+static void schro_unpack_init_with_data (Unpack * unpack, unsigned char *data,
+    int n_bytes, unsigned int guard_bit);
+
+static unsigned int schro_unpack_decode_bit (Unpack * unpack);
+static unsigned int schro_unpack_decode_uint (Unpack * unpack);
+
+
+void schro_video_format_set_std_video_format (DiracSequenceHeader * format,
+    int index);
+void schro_video_format_set_std_frame_rate (DiracSequenceHeader * format,
+    int index);
+void schro_video_format_set_std_aspect_ratio (DiracSequenceHeader * format,
+    int index);
+void schro_video_format_set_std_signal_range (DiracSequenceHeader * format,
+    int index);
+void schro_video_format_set_std_colour_spec (DiracSequenceHeader * format,
+    int index);
+
+
+
+
+int
+dirac_sequence_header_parse (DiracSequenceHeader * header,
+    unsigned char *data, int n_bytes)
+{
+  int bit;
+  int index;
+  Unpack _unpack;
+  Unpack *unpack = &_unpack;
+  int major_version;
+  int minor_version;
+  int profile;
+  int level;
+
+  memset (header, 0, sizeof (*header));
+
+  schro_unpack_init_with_data (unpack, data, n_bytes, 1);
+
+  /* parse parameters */
+  major_version = schro_unpack_decode_uint (unpack);
+  minor_version = schro_unpack_decode_uint (unpack);
+  profile = schro_unpack_decode_uint (unpack);
+  level = schro_unpack_decode_uint (unpack);
+
+  /* base video header */
+  index = schro_unpack_decode_uint (unpack);
+  schro_video_format_set_std_video_format (header, index);
+
+  header->major_version = major_version;
+  header->minor_version = minor_version;
+  header->profile = profile;
+  header->level = level;
+
+  /* source parameters */
+  /* frame dimensions */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    header->width = schro_unpack_decode_uint (unpack);
+    header->height = schro_unpack_decode_uint (unpack);
+  }
+
+  /* chroma header */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    header->chroma_format = schro_unpack_decode_uint (unpack);
+  }
+
+  /* scan header */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    header->interlaced = schro_unpack_decode_uint (unpack);
+  }
+
+  /* frame rate */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    index = schro_unpack_decode_uint (unpack);
+    if (index == 0) {
+      header->frame_rate_numerator = schro_unpack_decode_uint (unpack);
+      header->frame_rate_denominator = schro_unpack_decode_uint (unpack);
+    } else {
+      schro_video_format_set_std_frame_rate (header, index);
+    }
+  }
+
+  /* aspect ratio */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    index = schro_unpack_decode_uint (unpack);
+    if (index == 0) {
+      header->aspect_ratio_numerator = schro_unpack_decode_uint (unpack);
+      header->aspect_ratio_denominator = schro_unpack_decode_uint (unpack);
+    } else {
+      schro_video_format_set_std_aspect_ratio (header, index);
+    }
+  }
+
+  /* clean area */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    header->clean_width = schro_unpack_decode_uint (unpack);
+    header->clean_height = schro_unpack_decode_uint (unpack);
+    header->left_offset = schro_unpack_decode_uint (unpack);
+    header->top_offset = schro_unpack_decode_uint (unpack);
+  }
+
+  /* signal range */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    index = schro_unpack_decode_uint (unpack);
+    if (index == 0) {
+      header->luma_offset = schro_unpack_decode_uint (unpack);
+      header->luma_excursion = schro_unpack_decode_uint (unpack);
+      header->chroma_offset = schro_unpack_decode_uint (unpack);
+      header->chroma_excursion = schro_unpack_decode_uint (unpack);
+    } else {
+      schro_video_format_set_std_signal_range (header, index);
+    }
+  }
+
+  /* colour spec */
+  bit = schro_unpack_decode_bit (unpack);
+  if (bit) {
+    index = schro_unpack_decode_uint (unpack);
+    schro_video_format_set_std_colour_spec (header, index);
+    if (index == 0) {
+      /* colour primaries */
+      bit = schro_unpack_decode_bit (unpack);
+      if (bit) {
+        header->colour_primaries = schro_unpack_decode_uint (unpack);
+      }
+      /* colour matrix */
+      bit = schro_unpack_decode_bit (unpack);
+      if (bit) {
+        header->colour_matrix = schro_unpack_decode_uint (unpack);
+      }
+      /* transfer function */
+      bit = schro_unpack_decode_bit (unpack);
+      if (bit) {
+        header->transfer_function = schro_unpack_decode_uint (unpack);
+      }
+    }
+  }
+
+  header->interlaced_coding = schro_unpack_decode_uint (unpack);
+
+  return 1;
+}
+
+/* standard stuff */
+
+static DiracSequenceHeader schro_video_formats[] = {
+  {0, 0, 0, 0,
+        0,                      /* custom */
+        640, 480, SCHRO_CHROMA_420,
+        FALSE, FALSE,
+        24000, 1001, 1, 1,
+        640, 480, 0, 0,
+        0, 255, 128, 255,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        1,                      /* QSIF525 */
+        176, 120, SCHRO_CHROMA_420,
+        FALSE, FALSE,
+        15000, 1001, 10, 11,
+        176, 120, 0, 0,
+        0, 255, 128, 255,
+      1, 1, 0},
+  {0, 0, 0, 0,
+        2,                      /* QCIF */
+        176, 144, SCHRO_CHROMA_420,
+        FALSE, TRUE,
+        25, 2, 12, 11,
+        176, 144, 0, 0,
+        0, 255, 128, 255,
+      2, 1, 0},
+  {0, 0, 0, 0,
+        3,                      /* SIF525 */
+        352, 240, SCHRO_CHROMA_420,
+        FALSE, FALSE,
+        15000, 1001, 10, 11,
+        352, 240, 0, 0,
+        0, 255, 128, 255,
+      1, 1, 0},
+  {0, 0, 0, 0,
+        4,                      /* CIF */
+        352, 288, SCHRO_CHROMA_420,
+        FALSE, TRUE,
+        25, 2, 12, 11,
+        352, 288, 0, 0,
+        0, 255, 128, 255,
+      2, 1, 0},
+  {0, 0, 0, 0,
+        5,                      /* 4SIF525 */
+        704, 480, SCHRO_CHROMA_420,
+        FALSE, FALSE,
+        15000, 1001, 10, 11,
+        704, 480, 0, 0,
+        0, 255, 128, 255,
+      1, 1, 0},
+  {0, 0, 0, 0,
+        6,                      /* 4CIF */
+        704, 576, SCHRO_CHROMA_420,
+        FALSE, TRUE,
+        25, 2, 12, 11,
+        704, 576, 0, 0,
+        0, 255, 128, 255,
+      2, 1, 0},
+  {0, 0, 0, 0,
+        7,                      /* SD480I-60 */
+        720, 480, SCHRO_CHROMA_422,
+        TRUE, FALSE,
+        30000, 1001, 10, 11,
+        704, 480, 8, 0,
+        64, 876, 512, 896,
+      1, 1, 0},
+  {0, 0, 0, 0,
+        8,                      /* SD576I-50 */
+        720, 576, SCHRO_CHROMA_422,
+        TRUE, TRUE,
+        25, 1, 12, 11,
+        704, 576, 8, 0,
+        64, 876, 512, 896,
+      2, 1, 0},
+  {0, 0, 0, 0,
+        9,                      /* HD720P-60 */
+        1280, 720, SCHRO_CHROMA_422,
+        FALSE, TRUE,
+        60000, 1001, 1, 1,
+        1280, 720, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        10,                     /* HD720P-50 */
+        1280, 720, SCHRO_CHROMA_422,
+        FALSE, TRUE,
+        50, 1, 1, 1,
+        1280, 720, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        11,                     /* HD1080I-60 */
+        1920, 1080, SCHRO_CHROMA_422,
+        TRUE, TRUE,
+        30000, 1001, 1, 1,
+        1920, 1080, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        12,                     /* HD1080I-50 */
+        1920, 1080, SCHRO_CHROMA_422,
+        TRUE, TRUE,
+        25, 1, 1, 1,
+        1920, 1080, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        13,                     /* HD1080P-60 */
+        1920, 1080, SCHRO_CHROMA_422,
+        FALSE, TRUE,
+        60000, 1001, 1, 1,
+        1920, 1080, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        14,                     /* HD1080P-50 */
+        1920, 1080, SCHRO_CHROMA_422,
+        FALSE, TRUE,
+        50, 1, 1, 1,
+        1920, 1080, 0, 0,
+        64, 876, 512, 896,
+      0, 0, 0},
+  {0, 0, 0, 0,
+        15,                     /* DC2K */
+        2048, 1080, SCHRO_CHROMA_444,
+        FALSE, TRUE,
+        24, 1, 1, 1,
+        2048, 1080, 0, 0,
+        256, 3504, 2048, 3584,
+      3, 0, 0},
+  {0, 0, 0, 0,
+        16,                     /* DC4K */
+        4096, 2160, SCHRO_CHROMA_444,
+        FALSE, TRUE,
+        24, 1, 1, 1,
+        2048, 1536, 0, 0,
+        256, 3504, 2048, 3584,
+      3, 0, 0},
+};
+
+void
+schro_video_format_set_std_video_format (DiracSequenceHeader * format,
+    int index)
+{
+
+  if (index < 0 || index >= ARRAY_SIZE (schro_video_formats)) {
+    return;
+  }
+
+  memcpy (format, schro_video_formats + index, sizeof (DiracSequenceHeader));
+}
+
+typedef struct _SchroFrameRate SchroFrameRate;
+struct _SchroFrameRate
+{
+  int numerator;
+  int denominator;
+};
+
+static SchroFrameRate schro_frame_rates[] = {
+  {0, 0},
+  {24000, 1001},
+  {24, 1},
+  {25, 1},
+  {30000, 1001},
+  {30, 1},
+  {50, 1},
+  {60000, 1001},
+  {60, 1},
+  {15000, 1001},
+  {25, 2}
+};
+
+void
+schro_video_format_set_std_frame_rate (DiracSequenceHeader * format, int index)
+{
+  if (index < 1 || index >= ARRAY_SIZE (schro_frame_rates)) {
+    return;
+  }
+
+  format->frame_rate_numerator = schro_frame_rates[index].numerator;
+  format->frame_rate_denominator = schro_frame_rates[index].denominator;
+}
+
+typedef struct _SchroPixelAspectRatio SchroPixelAspectRatio;
+struct _SchroPixelAspectRatio
+{
+  int numerator;
+  int denominator;
+};
+
+static const SchroPixelAspectRatio schro_aspect_ratios[] = {
+  {0, 0},
+  {1, 1},
+  {10, 11},
+  {12, 11},
+  {40, 33},
+  {16, 11},
+  {4, 3}
+};
+
+void
+schro_video_format_set_std_aspect_ratio (DiracSequenceHeader * format,
+    int index)
+{
+  if (index < 1 || index >= ARRAY_SIZE (schro_aspect_ratios)) {
+    return;
+  }
+
+  format->aspect_ratio_numerator = schro_aspect_ratios[index].numerator;
+  format->aspect_ratio_denominator = schro_aspect_ratios[index].denominator;
+
+}
+
+typedef struct _SchroSignalRangeStruct SchroSignalRangeStruct;
+struct _SchroSignalRangeStruct
+{
+  int luma_offset;
+  int luma_excursion;
+  int chroma_offset;
+  int chroma_excursion;
+};
+
+static const SchroSignalRangeStruct schro_signal_ranges[] = {
+  {0, 0, 0, 0},
+  {0, 255, 128, 255},
+  {16, 219, 128, 224},
+  {64, 876, 512, 896},
+  {256, 3504, 2048, 3584}
+};
+
+void
+schro_video_format_set_std_signal_range (DiracSequenceHeader * format, int i)
+{
+  if (i < 1 || i >= ARRAY_SIZE (schro_signal_ranges)) {
+    return;
+  }
+
+  format->luma_offset = schro_signal_ranges[i].luma_offset;
+  format->luma_excursion = schro_signal_ranges[i].luma_excursion;
+  format->chroma_offset = schro_signal_ranges[i].chroma_offset;
+  format->chroma_excursion = schro_signal_ranges[i].chroma_excursion;
+}
+
+typedef struct _SchroColourSpecStruct SchroColourSpecStruct;
+struct _SchroColourSpecStruct
+{
+  int colour_primaries;
+  int colour_matrix;
+  int transfer_function;
+};
+
+static const SchroColourSpecStruct schro_colour_specs[] = {
+  {                             /* Custom */
+        SCHRO_COLOUR_PRIMARY_HDTV,
+        SCHRO_COLOUR_MATRIX_HDTV,
+      SCHRO_TRANSFER_CHAR_TV_GAMMA},
+  {                             /* SDTV 525 */
+        SCHRO_COLOUR_PRIMARY_SDTV_525,
+        SCHRO_COLOUR_MATRIX_SDTV,
+      SCHRO_TRANSFER_CHAR_TV_GAMMA},
+  {                             /* SDTV 625 */
+        SCHRO_COLOUR_PRIMARY_SDTV_625,
+        SCHRO_COLOUR_MATRIX_SDTV,
+      SCHRO_TRANSFER_CHAR_TV_GAMMA},
+  {                             /* HDTV */
+        SCHRO_COLOUR_PRIMARY_HDTV,
+        SCHRO_COLOUR_MATRIX_HDTV,
+      SCHRO_TRANSFER_CHAR_TV_GAMMA},
+  {                             /* Cinema */
+        SCHRO_COLOUR_PRIMARY_CINEMA,
+        SCHRO_COLOUR_MATRIX_HDTV,
+      SCHRO_TRANSFER_CHAR_TV_GAMMA}
+};
+
+void
+schro_video_format_set_std_colour_spec (DiracSequenceHeader * format, int i)
+{
+  if (i < 0 || i >= ARRAY_SIZE (schro_colour_specs)) {
+    return;
+  }
+
+  format->colour_primaries = schro_colour_specs[i].colour_primaries;
+  format->colour_matrix = schro_colour_specs[i].colour_matrix;
+  format->transfer_function = schro_colour_specs[i].transfer_function;
+}
+
+
+/* unpack */
+
+static void
+schro_unpack_init_with_data (Unpack * unpack, unsigned char *data,
+    int n_bytes, unsigned int guard_bit)
+{
+  memset (unpack, 0, sizeof (Unpack));
+
+  unpack->data = data;
+  unpack->n_bits_left = 8 * n_bytes;
+  unpack->guard_bit = guard_bit;
+}
+
+static unsigned int
+schro_unpack_decode_bit (Unpack * unpack)
+{
+  int bit;
+
+  if (unpack->n_bits_left < 1) {
+    return unpack->guard_bit;
+  }
+  bit = (unpack->data[unpack->index >> 3] >> (7 - (unpack->index & 7))) & 1;
+  unpack->index++;
+  unpack->n_bits_left--;
+
+  return bit;
+}
+
+static unsigned int
+schro_unpack_decode_uint (Unpack * unpack)
+{
+  int count;
+  int value;
+
+  count = 0;
+  value = 0;
+  while (!schro_unpack_decode_bit (unpack)) {
+    count++;
+    value <<= 1;
+    value |= schro_unpack_decode_bit (unpack);
+  }
+
+  return (1 << count) - 1 + value;
+}