[FFmpeg-cvslog] mov: Refactor video specific parsing in mov_parse_stsd_video
Luca Barbato
git at videolan.org
Mon Aug 26 13:12:00 CEST 2013
ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Thu Aug 22 15:05:27 2013 +0200| [a3b53ff062eaccdaa28964899c63520ef2978c2e] | committer: Luca Barbato
mov: Refactor video specific parsing in mov_parse_stsd_video
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a3b53ff062eaccdaa28964899c63520ef2978c2e
---
libavformat/mov.c | 215 +++++++++++++++++++++++++++--------------------------
1 file changed, 108 insertions(+), 107 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 16dab92..0c3f988 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1100,11 +1100,117 @@ static int mov_codec_id(AVStream *st, uint32_t format)
return id;
}
+static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
+ AVStream *st, MOVStreamContext *sc)
+{
+ unsigned int color_depth, len, j;
+ int color_greyscale;
+ int color_table_id;
+
+ avio_rb16(pb); /* version */
+ avio_rb16(pb); /* revision level */
+ avio_rb32(pb); /* vendor */
+ avio_rb32(pb); /* temporal quality */
+ avio_rb32(pb); /* spatial quality */
+
+ st->codec->width = avio_rb16(pb); /* width */
+ st->codec->height = avio_rb16(pb); /* height */
+
+ avio_rb32(pb); /* horiz resolution */
+ avio_rb32(pb); /* vert resolution */
+ avio_rb32(pb); /* data size, always 0 */
+ avio_rb16(pb); /* frames per samples */
+
+ len = avio_r8(pb); /* codec name, pascal string */
+ if (len > 31)
+ len = 31;
+ mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
+ if (len < 31)
+ avio_skip(pb, 31 - len);
+ /* codec_tag YV12 triggers an UV swap in rawdec.c */
+ if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
+ st->codec->codec_tag = MKTAG('I', '4', '2', '0');
+ /* Flash Media Server uses tag H263 with Sorenson Spark */
+ if (st->codec->codec_tag == MKTAG('H','2','6','3') &&
+ !memcmp(st->codec->codec_name, "Sorenson H263", 13))
+ st->codec->codec_id = AV_CODEC_ID_FLV1;
+
+ st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
+ color_table_id = avio_rb16(pb); /* colortable id */
+ av_dlog(c->fc, "depth %d, ctab id %d\n",
+ st->codec->bits_per_coded_sample, color_table_id);
+ /* figure out the palette situation */
+ color_depth = st->codec->bits_per_coded_sample & 0x1F;
+ color_greyscale = st->codec->bits_per_coded_sample & 0x20;
+
+ /* if the depth is 2, 4, or 8 bpp, file is palettized */
+ if ((color_depth == 2) || (color_depth == 4) || (color_depth == 8)) {
+ /* for palette traversal */
+ unsigned int color_start, color_count, color_end;
+ unsigned char r, g, b;
+
+ if (color_greyscale) {
+ int color_index, color_dec;
+ /* compute the greyscale palette */
+ st->codec->bits_per_coded_sample = color_depth;
+ color_count = 1 << color_depth;
+ color_index = 255;
+ color_dec = 256 / (color_count - 1);
+ for (j = 0; j < color_count; j++) {
+ r = g = b = color_index;
+ sc->palette[j] = (r << 16) | (g << 8) | (b);
+ color_index -= color_dec;
+ if (color_index < 0)
+ color_index = 0;
+ }
+ } else if (color_table_id) {
+ const uint8_t *color_table;
+ /* if flag bit 3 is set, use the default palette */
+ color_count = 1 << color_depth;
+ if (color_depth == 2)
+ color_table = ff_qt_default_palette_4;
+ else if (color_depth == 4)
+ color_table = ff_qt_default_palette_16;
+ else
+ color_table = ff_qt_default_palette_256;
+
+ for (j = 0; j < color_count; j++) {
+ r = color_table[j * 3 + 0];
+ g = color_table[j * 3 + 1];
+ b = color_table[j * 3 + 2];
+ sc->palette[j] = (r << 16) | (g << 8) | (b);
+ }
+ } else {
+ /* load the palette from the file */
+ color_start = avio_rb32(pb);
+ color_count = avio_rb16(pb);
+ color_end = avio_rb16(pb);
+ if ((color_start <= 255) && (color_end <= 255)) {
+ for (j = color_start; j <= color_end; j++) {
+ /* each R, G, or B component is 16 bits;
+ * only use the top 8 bits; skip alpha bytes
+ * up front */
+ avio_r8(pb);
+ avio_r8(pb);
+ r = avio_r8(pb);
+ avio_r8(pb);
+ g = avio_r8(pb);
+ avio_r8(pb);
+ b = avio_r8(pb);
+ avio_r8(pb);
+ sc->palette[j] = (r << 16) | (g << 8) | (b);
+ }
+ }
+ }
+ sc->has_palette = 1;
+ }
+}
+
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
{
AVStream *st;
MOVStreamContext *sc;
- int j, pseudo_stream_id;
+ int pseudo_stream_id;
if (c->fc->nb_streams < 1)
return 0;
@@ -1157,113 +1263,8 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
(format >> 24) & 0xff, st->codec->codec_type);
if (st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
- unsigned int color_depth, len;
- int color_greyscale;
- int color_table_id;
-
st->codec->codec_id = id;
- avio_rb16(pb); /* version */
- avio_rb16(pb); /* revision level */
- avio_rb32(pb); /* vendor */
- avio_rb32(pb); /* temporal quality */
- avio_rb32(pb); /* spatial quality */
-
- st->codec->width = avio_rb16(pb); /* width */
- st->codec->height = avio_rb16(pb); /* height */
-
- avio_rb32(pb); /* horiz resolution */
- avio_rb32(pb); /* vert resolution */
- avio_rb32(pb); /* data size, always 0 */
- avio_rb16(pb); /* frames per samples */
-
- len = avio_r8(pb); /* codec name, pascal string */
- if (len > 31)
- len = 31;
- mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
- if (len < 31)
- avio_skip(pb, 31 - len);
- /* codec_tag YV12 triggers an UV swap in rawdec.c */
- if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
- st->codec->codec_tag=MKTAG('I', '4', '2', '0');
- /* Flash Media Server uses tag H263 with Sorenson Spark */
- if (format == MKTAG('H','2','6','3') &&
- !memcmp(st->codec->codec_name, "Sorenson H263", 13))
- st->codec->codec_id = AV_CODEC_ID_FLV1;
-
- st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
- color_table_id = avio_rb16(pb); /* colortable id */
- av_dlog(c->fc, "depth %d, ctab id %d\n",
- st->codec->bits_per_coded_sample, color_table_id);
- /* figure out the palette situation */
- color_depth = st->codec->bits_per_coded_sample & 0x1F;
- color_greyscale = st->codec->bits_per_coded_sample & 0x20;
-
- /* if the depth is 2, 4, or 8 bpp, file is palettized */
- if ((color_depth == 2) || (color_depth == 4) ||
- (color_depth == 8)) {
- /* for palette traversal */
- unsigned int color_start, color_count, color_end;
- unsigned char r, g, b;
-
- if (color_greyscale) {
- int color_index, color_dec;
- /* compute the greyscale palette */
- st->codec->bits_per_coded_sample = color_depth;
- color_count = 1 << color_depth;
- color_index = 255;
- color_dec = 256 / (color_count - 1);
- for (j = 0; j < color_count; j++) {
- r = g = b = color_index;
- sc->palette[j] =
- (r << 16) | (g << 8) | (b);
- color_index -= color_dec;
- if (color_index < 0)
- color_index = 0;
- }
- } else if (color_table_id) {
- const uint8_t *color_table;
- /* if flag bit 3 is set, use the default palette */
- color_count = 1 << color_depth;
- if (color_depth == 2)
- color_table = ff_qt_default_palette_4;
- else if (color_depth == 4)
- color_table = ff_qt_default_palette_16;
- else
- color_table = ff_qt_default_palette_256;
-
- for (j = 0; j < color_count; j++) {
- r = color_table[j * 3 + 0];
- g = color_table[j * 3 + 1];
- b = color_table[j * 3 + 2];
- sc->palette[j] =
- (r << 16) | (g << 8) | (b);
- }
- } else {
- /* load the palette from the file */
- color_start = avio_rb32(pb);
- color_count = avio_rb16(pb);
- color_end = avio_rb16(pb);
- if ((color_start <= 255) &&
- (color_end <= 255)) {
- for (j = color_start; j <= color_end; j++) {
- /* each R, G, or B component is 16 bits;
- * only use the top 8 bits; skip alpha bytes
- * up front */
- avio_r8(pb);
- avio_r8(pb);
- r = avio_r8(pb);
- avio_r8(pb);
- g = avio_r8(pb);
- avio_r8(pb);
- b = avio_r8(pb);
- avio_r8(pb);
- sc->palette[j] =
- (r << 16) | (g << 8) | (b);
- }
- }
- }
- sc->has_palette = 1;
- }
+ mov_parse_stsd_video(c, pb, st, sc);
} else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
int bits_per_sample, flags;
uint16_t version = avio_rb16(pb);
More information about the ffmpeg-cvslog
mailing list