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Code Issues Releases Activity

avformat/matroskadec: Factor generic parsing of audio tracks out

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-03 23:51:58 +02:00
parent c2b8a694e1
commit a20bd65934
1 changed files with 47 additions and 32 deletions
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79
libavformat/matroskadec.c
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@ -2734,6 +2734,50 @@ static int mka_parse_audio_codec(MatroskaTrack *track, AVCodecParameters *par,
return 0;
}
/* Performs the generic part of parsing an audio track. */
static int mka_parse_audio(MatroskaTrack *track, AVStream *st,
AVCodecParameters *par,
const MatroskaDemuxContext *matroska,
AVFormatContext *s, int *extradata_offset)
{
FFStream *const sti = ffstream(st);
int ret;
ret = mka_parse_audio_codec(track, par, matroska,
s, extradata_offset);
if (ret)
return ret;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->sample_rate = track->audio.out_samplerate;
// channel layout may be already set by codec private checks above
if (!av_channel_layout_check(&par->ch_layout)) {
par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
par->ch_layout.nb_channels = track->audio.channels;
}
if (!par->bits_per_coded_sample)
par->bits_per_coded_sample = track->audio.bitdepth;
if (par->codec_id == AV_CODEC_ID_MP3 ||
par->codec_id == AV_CODEC_ID_MLP ||
par->codec_id == AV_CODEC_ID_TRUEHD)
sti->need_parsing = AVSTREAM_PARSE_FULL;
else if (par->codec_id != AV_CODEC_ID_AAC)
sti->need_parsing = AVSTREAM_PARSE_HEADERS;
if (track->codec_delay > 0) {
par->initial_padding = av_rescale_q(track->codec_delay,
(AVRational){1, 1000000000},
(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
48000 : par->sample_rate});
}
if (track->seek_preroll > 0) {
par->seek_preroll = av_rescale_q(track->seek_preroll,
(AVRational){1, 1000000000},
(AVRational){1, par->sample_rate});
}
return 0;
}
/* Performs the codec-specific part of parsing a video track. */
static int mkv_parse_video_codec(MatroskaTrack *track, AVCodecParameters *par,
const MatroskaDemuxContext *matroska,
@ -2959,7 +3003,6 @@ static int matroska_parse_tracks(AVFormatContext *s)
AVCodecParameters *par;
int extradata_offset = 0;
AVStream *st;
FFStream *sti;
char* key_id_base64 = NULL;
/* Apply some sanity checks. */
@ -3089,7 +3132,6 @@ static int matroska_parse_tracks(AVFormatContext *s)
av_free(key_id_base64);
return AVERROR(ENOMEM);
}
sti = ffstream(st);
par = st->codecpar;
par->codec_id = codec_id;
@ -3133,8 +3175,8 @@ static int matroska_parse_tracks(AVFormatContext *s)
st->time_base);
if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
ret = mka_parse_audio_codec(track, par, matroska,
s, &extradata_offset);
ret = mka_parse_audio(track, st, par, matroska,
s, &extradata_offset);
if (ret < 0)
return ret;
if (ret == SKIP_TRACK)
@ -3162,34 +3204,7 @@ static int matroska_parse_tracks(AVFormatContext *s)
memcpy(par->extradata, src, extra_size);
}
if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->sample_rate = track->audio.out_samplerate;
// channel layout may be already set by codec private checks above
if (!av_channel_layout_check(&par->ch_layout)) {
par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
par->ch_layout.nb_channels = track->audio.channels;
}
if (!par->bits_per_coded_sample)
par->bits_per_coded_sample = track->audio.bitdepth;
if (par->codec_id == AV_CODEC_ID_MP3 ||
par->codec_id == AV_CODEC_ID_MLP ||
par->codec_id == AV_CODEC_ID_TRUEHD)
sti->need_parsing = AVSTREAM_PARSE_FULL;
else if (par->codec_id != AV_CODEC_ID_AAC)
sti->need_parsing = AVSTREAM_PARSE_HEADERS;
if (track->codec_delay > 0) {
par->initial_padding = av_rescale_q(track->codec_delay,
(AVRational){1, 1000000000},
(AVRational){1, par->codec_id == AV_CODEC_ID_OPUS ?
48000 : par->sample_rate});
}
if (track->seek_preroll > 0) {
par->seek_preroll = av_rescale_q(track->seek_preroll,
(AVRational){1, 1000000000},
(AVRational){1, par->sample_rate});
}
} else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
if (par->codec_id == AV_CODEC_ID_WEBVTT) {
par->codec_type = AVMEDIA_TYPE_SUBTITLE;
if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {