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XMA1 and XMA2 stereo decoders

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
2015-11-01 13:15:36 +01:00
parent c8780822ba
commit b456ece557
10 changed files with 164 additions and 21 deletions
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27
libavformat/riffdec.c
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@@ -99,10 +99,12 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
codec->codec_type = AVMEDIA_TYPE_AUDIO;
if (!big_endian) {
id = avio_rl16(pb);
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
bitrate = avio_rl32(pb) * 8LL;
codec->block_align = avio_rl16(pb);
if (id != 0x0165) {
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
bitrate = avio_rl32(pb) * 8LL;
codec->block_align = avio_rl16(pb);
}
} else {
id = avio_rb16(pb);
codec->channels = avio_rb16(pb);
@@ -126,7 +128,7 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
codec->codec_id = ff_wav_codec_get_id(id,
codec->bits_per_coded_sample);
}
if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
if (size >= 18 && id != 0x0165) { /* We're obviously dealing with WAVEFORMATEX */
int cbSize = avio_rl16(pb); /* cbSize */
if (big_endian) {
avpriv_report_missing_feature(codec, "WAVEFORMATEX support for RIFX files\n");
@@ -149,6 +151,21 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
/* It is possible for the chunk to contain garbage at the end */
if (size > 0)
avio_skip(pb, size);
} else if (id == 0x0165 && size >= 32) {
int nb_streams, i;
size -= 4;
av_freep(&codec->extradata);
if (ff_get_extradata(codec, pb, size) < 0)
return AVERROR(ENOMEM);
nb_streams = AV_RL16(codec->extradata + 4);
codec->sample_rate = AV_RL32(codec->extradata + 12);
codec->channels = 0;
bitrate = 0;
if (size < 8 + nb_streams * 20)
return AVERROR_INVALIDDATA;
for (i = 0; i < nb_streams; i++)
codec->channels += codec->extradata[8 + i * 20 + 17];
}
if (bitrate > INT_MAX) {