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avformat/matroskadec: Factor video parsing out of matroska_parse_tracks()
More exactly, factor codec-specific video parsing out of matroska_parse_tracks(). This is intended to improve readability. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
parent
8eaf23a160
commit
15f96bb074
@ -2734,6 +2734,75 @@ static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
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return 0;
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}
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/* Performs the codec-specific part of parsing a video track. */
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static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
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const MatroskaDemuxContext *matroska,
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int *extradata_offset)
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{
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if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
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track->codec_priv.size >= 40) {
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track->ms_compat = 1;
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par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
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par->codec_tag = AV_RL32(track->codec_priv.data + 16);
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par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
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par->codec_tag);
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if (!par->codec_id)
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par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
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par->codec_tag);
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*extradata_offset = 40;
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return 0;
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} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
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track->codec_priv.size >= 21) {
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enum AVCodecID codec_id;
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uint32_t fourcc;
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int ret = get_qt_codec(track, &fourcc, &codec_id);
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if (ret < 0)
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return ret;
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if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
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fourcc = MKTAG('S','V','Q','3');
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codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
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}
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par->codec_id = codec_id;
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if (codec_id == AV_CODEC_ID_NONE)
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av_log(matroska->ctx, AV_LOG_ERROR,
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"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
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if (track->codec_priv.size >= 86) {
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FFIOContext b;
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unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
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ffio_init_context(&b, track->codec_priv.data,
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track->codec_priv.size,
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0, NULL, NULL, NULL, NULL);
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if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
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bit_depth &= 0x1F;
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track->has_palette = 1;
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}
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par->bits_per_coded_sample = bit_depth;
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}
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par->codec_tag = fourcc;
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return 0;
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}
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switch (par->codec_id) {
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case AV_CODEC_ID_RV10:
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case AV_CODEC_ID_RV20:
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case AV_CODEC_ID_RV30:
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case AV_CODEC_ID_RV40:
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*extradata_offset = 26;
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break;
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case AV_CODEC_ID_PRORES:
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if (track->codec_priv.size == 4)
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par->codec_tag = AV_RL32(track->codec_priv.data);
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break;
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case AV_CODEC_ID_VP9:
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/* we don't need any value stored in CodecPrivate.
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make sure that it's not exported as extradata. */
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track->codec_priv.size = 0;
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break;
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}
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return 0;
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}
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static int matroska_parse_tracks(AVFormatContext *s)
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{
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MatroskaDemuxContext *matroska = s->priv_data;
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@ -2749,7 +2818,6 @@ static int matroska_parse_tracks(AVFormatContext *s)
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AVCodecParameters *par;
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int extradata_offset = 0;
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uint32_t fourcc = 0;
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FFIOContext b;
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AVStream *st;
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FFStream *sti;
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char* key_id_base64 = NULL;
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@ -2934,55 +3002,11 @@ static int matroska_parse_tracks(AVFormatContext *s)
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return ret;
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if (ret == SKIP_TRACK)
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continue;
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} else
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if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
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track->codec_priv.size >= 40) {
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track->ms_compat = 1;
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par->bits_per_coded_sample = AV_RL16(track->codec_priv.data + 14);
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par->codec_tag = AV_RL32(track->codec_priv.data + 16);
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par->codec_id = ff_codec_get_id(ff_codec_bmp_tags,
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par->codec_tag);
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if (!par->codec_id)
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par->codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
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par->codec_tag);
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extradata_offset = 40;
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} else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
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track->codec_priv.size >= 21) {
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uint32_t fourcc;
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int ret = get_qt_codec(track, &fourcc, &codec_id);
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} else if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
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ret = mkv_parse_video_codec(track, par, matroska,
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&extradata_offset);
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if (ret < 0)
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return ret;
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if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
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fourcc = MKTAG('S','V','Q','3');
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codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
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}
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par->codec_id = codec_id;
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if (codec_id == AV_CODEC_ID_NONE)
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av_log(matroska->ctx, AV_LOG_ERROR,
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"mov FourCC not found %s.\n", av_fourcc2str(fourcc));
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if (track->codec_priv.size >= 86) {
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unsigned bit_depth = AV_RB16(track->codec_priv.data + 82);
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ffio_init_context(&b, track->codec_priv.data,
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track->codec_priv.size,
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0, NULL, NULL, NULL, NULL);
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if (ff_get_qtpalette(codec_id, &b.pub, track->palette)) {
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bit_depth &= 0x1F;
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track->has_palette = 1;
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}
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par->bits_per_coded_sample = bit_depth;
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}
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par->codec_tag = fourcc;
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} else if (codec_id == AV_CODEC_ID_RV10 ||
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codec_id == AV_CODEC_ID_RV20 ||
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codec_id == AV_CODEC_ID_RV30 ||
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codec_id == AV_CODEC_ID_RV40) {
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extradata_offset = 26;
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} else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
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par->codec_tag = AV_RL32(track->codec_priv.data);
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} else if (codec_id == AV_CODEC_ID_VP9) {
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/* we don't need any value stored in CodecPrivate.
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make sure that it's not exported as extradata. */
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track->codec_priv.size = 0;
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} else if (codec_id == AV_CODEC_ID_ARIB_CAPTION && track->codec_priv.size == 3) {
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int component_tag = track->codec_priv.data[0];
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int data_component_id = AV_RB16(track->codec_priv.data + 1);
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