mirror of https://git.ffmpeg.org/ffmpeg.git
mov: Refactor audio specific parsing in mov_parse_stsd_audio
This commit is contained in:
Luca Barbato
parent
a3b53ff062
commit
ef196beeb5
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@ -1206,6 +1206,92 @@ static void mov_parse_stsd_video(MOVContext *c, AVIOContext *pb,
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}
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}
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static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
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AVStream *st, MOVStreamContext *sc)
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{
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int bits_per_sample, flags;
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uint16_t version = avio_rb16(pb);
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avio_rb16(pb); /* revision level */
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avio_rb32(pb); /* vendor */
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st->codec->channels = avio_rb16(pb); /* channel count */
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st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
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av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
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sc->audio_cid = avio_rb16(pb);
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avio_rb16(pb); /* packet size = 0 */
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st->codec->sample_rate = ((avio_rb32(pb) >> 16));
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// Read QT version 1 fields. In version 0 these do not exist.
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av_dlog(c->fc, "version =%d, isom =%d\n", version, c->isom);
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if (!c->isom) {
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if (version == 1) {
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sc->samples_per_frame = avio_rb32(pb);
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avio_rb32(pb); /* bytes per packet */
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sc->bytes_per_frame = avio_rb32(pb);
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avio_rb32(pb); /* bytes per sample */
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} else if (version == 2) {
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avio_rb32(pb); /* sizeof struct only */
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st->codec->sample_rate = av_int2double(avio_rb64(pb));
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st->codec->channels = avio_rb32(pb);
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avio_rb32(pb); /* always 0x7F000000 */
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st->codec->bits_per_coded_sample = avio_rb32(pb);
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flags = avio_rb32(pb); /* lpcm format specific flag */
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sc->bytes_per_frame = avio_rb32(pb);
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sc->samples_per_frame = avio_rb32(pb);
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if (st->codec->codec_tag == MKTAG('l','p','c','m'))
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st->codec->codec_id =
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ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample,
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flags);
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}
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}
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switch (st->codec->codec_id) {
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case AV_CODEC_ID_PCM_S8:
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case AV_CODEC_ID_PCM_U8:
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if (st->codec->bits_per_coded_sample == 16)
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st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
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break;
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case AV_CODEC_ID_PCM_S16LE:
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case AV_CODEC_ID_PCM_S16BE:
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if (st->codec->bits_per_coded_sample == 8)
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st->codec->codec_id = AV_CODEC_ID_PCM_S8;
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else if (st->codec->bits_per_coded_sample == 24)
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st->codec->codec_id =
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st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
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AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
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break;
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/* set values for old format before stsd version 1 appeared */
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case AV_CODEC_ID_MACE3:
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sc->samples_per_frame = 6;
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sc->bytes_per_frame = 2 * st->codec->channels;
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break;
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case AV_CODEC_ID_MACE6:
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sc->samples_per_frame = 6;
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sc->bytes_per_frame = 1 * st->codec->channels;
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break;
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case AV_CODEC_ID_ADPCM_IMA_QT:
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sc->samples_per_frame = 64;
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sc->bytes_per_frame = 34 * st->codec->channels;
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break;
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case AV_CODEC_ID_GSM:
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sc->samples_per_frame = 160;
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sc->bytes_per_frame = 33;
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break;
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default:
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break;
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}
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bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
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if (bits_per_sample) {
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st->codec->bits_per_coded_sample = bits_per_sample;
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sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
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}
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}
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int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
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{
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AVStream *st;
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@ -1266,85 +1352,8 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
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st->codec->codec_id = id;
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mov_parse_stsd_video(c, pb, st, sc);
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} else if (st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
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int bits_per_sample, flags;
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uint16_t version = avio_rb16(pb);
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st->codec->codec_id = id;
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avio_rb16(pb); /* revision level */
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avio_rb32(pb); /* vendor */
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st->codec->channels = avio_rb16(pb); /* channel count */
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av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
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st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
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sc->audio_cid = avio_rb16(pb);
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avio_rb16(pb); /* packet size = 0 */
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st->codec->sample_rate = ((avio_rb32(pb) >> 16));
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//Read QT version 1 fields. In version 0 these do not exist.
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av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
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if (!c->isom) {
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if (version==1) {
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sc->samples_per_frame = avio_rb32(pb);
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avio_rb32(pb); /* bytes per packet */
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sc->bytes_per_frame = avio_rb32(pb);
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avio_rb32(pb); /* bytes per sample */
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} else if (version==2) {
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avio_rb32(pb); /* sizeof struct only */
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st->codec->sample_rate = av_int2double(avio_rb64(pb)); /* float 64 */
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st->codec->channels = avio_rb32(pb);
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avio_rb32(pb); /* always 0x7F000000 */
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st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
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flags = avio_rb32(pb); /* lpcm format specific flag */
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sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
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sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
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if (format == MKTAG('l','p','c','m'))
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st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
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}
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}
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switch (st->codec->codec_id) {
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case AV_CODEC_ID_PCM_S8:
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case AV_CODEC_ID_PCM_U8:
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if (st->codec->bits_per_coded_sample == 16)
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st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
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break;
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case AV_CODEC_ID_PCM_S16LE:
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case AV_CODEC_ID_PCM_S16BE:
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if (st->codec->bits_per_coded_sample == 8)
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st->codec->codec_id = AV_CODEC_ID_PCM_S8;
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else if (st->codec->bits_per_coded_sample == 24)
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st->codec->codec_id =
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st->codec->codec_id == AV_CODEC_ID_PCM_S16BE ?
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AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
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break;
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/* set values for old format before stsd version 1 appeared */
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case AV_CODEC_ID_MACE3:
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sc->samples_per_frame = 6;
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sc->bytes_per_frame = 2*st->codec->channels;
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break;
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case AV_CODEC_ID_MACE6:
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sc->samples_per_frame = 6;
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sc->bytes_per_frame = 1*st->codec->channels;
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break;
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case AV_CODEC_ID_ADPCM_IMA_QT:
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sc->samples_per_frame = 64;
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sc->bytes_per_frame = 34*st->codec->channels;
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break;
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case AV_CODEC_ID_GSM:
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sc->samples_per_frame = 160;
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sc->bytes_per_frame = 33;
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break;
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default:
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break;
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}
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bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
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if (bits_per_sample) {
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st->codec->bits_per_coded_sample = bits_per_sample;
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sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
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}
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mov_parse_stsd_audio(c, pb, st, sc);
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} else if (st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
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// ttxt stsd contains display flags, justification, background
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// color, fonts, and default styles, so fake an atom to read it
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