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segafilm: add support for videos with cri adx adpcm

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Matthew Hoops 2011-07-05 12:21:22 -04:00 committed by Ronald S. Bultje
parent 99fecc64b0
commit 84d098d943
1 changed files with 21 additions and 7 deletions
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24
libavformat/segafilm.c
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@ -111,7 +111,9 @@ static int film_read_header(AVFormatContext *s,
film->audio_samplerate = AV_RB16(&scratch[24]);
film->audio_channels = scratch[21];
film->audio_bits = scratch[22];
if (film->audio_bits == 8)
if (scratch[23] == 2)
film->audio_type = CODEC_ID_ADPCM_ADX;
else if (film->audio_bits == 8)
film->audio_type = CODEC_ID_PCM_S8;
else if (film->audio_bits == 16)
film->audio_type = CODEC_ID_PCM_S16BE;
@ -149,14 +151,21 @@ static int film_read_header(AVFormatContext *s,
st->codec->codec_id = film->audio_type;
st->codec->codec_tag = 1;
st->codec->channels = film->audio_channels;
st->codec->bits_per_coded_sample = film->audio_bits;
st->codec->sample_rate = film->audio_samplerate;
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_coded_sample;
if (film->audio_type == CODEC_ID_ADPCM_ADX) {
st->codec->bits_per_coded_sample = 18 * 8 / 32;
st->codec->block_align = st->codec->channels * 18;
} else {
st->codec->bits_per_coded_sample = film->audio_bits;
st->codec->block_align = st->codec->channels *
st->codec->bits_per_coded_sample / 8;
}
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_coded_sample;
}
/* load the sample table */
if (avio_read(pb, scratch, 16) != 16)
return AVERROR(EIO);
@ -187,6 +196,10 @@ static int film_read_header(AVFormatContext *s,
film->sample_table[i].pts *= film->base_clock;
film->sample_table[i].pts /= film->audio_samplerate;
if (film->audio_type == CODEC_ID_ADPCM_ADX)
audio_frame_counter += (film->sample_table[i].sample_size * 32 /
(18 * film->audio_channels));
else
audio_frame_counter += (film->sample_table[i].sample_size /
(film->audio_channels * film->audio_bits / 8));
} else {
@ -227,7 +240,8 @@ static int film_read_packet(AVFormatContext *s,
return AVERROR(ENOMEM);
avio_read(pb, pkt->data, sample->sample_size);
} else if ((sample->stream == film->audio_stream_index) &&
(film->audio_channels == 2)) {
(film->audio_channels == 2) &&
(film->audio_type != CODEC_ID_ADPCM_ADX)) {
/* stereo PCM needs to be interleaved */
if (av_new_packet(pkt, sample->sample_size))