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lavf: add a common function for selecting a pcm codec from parameters

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This commit is contained in:
Justin Ruggles
2012-11-27 14:52:38 -05:00
parent bfe5454cd2
commit 261e9348ef
4 changed files with 57 additions and 36 deletions
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30
libavformat/utils.c
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@@ -2135,6 +2135,36 @@ enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
return AV_CODEC_ID_NONE;
}
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
{
if (flt) {
switch (bps) {
case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
default: return AV_CODEC_ID_NONE;
}
} else {
bps >>= 3;
if (sflags & (1 << (bps - 1))) {
switch (bps) {
case 1: return AV_CODEC_ID_PCM_S8;
case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
default: return AV_CODEC_ID_NONE;
}
} else {
switch (bps) {
case 1: return AV_CODEC_ID_PCM_U8;
case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
default: return AV_CODEC_ID_NONE;
}
}
}
}
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
{
int i;