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codec_tags: minor simplification

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At least this doesn't duplicate the libavcodec PCM codec names.
This commit is contained in:
wm4 2017-04-18 05:35:50 +02:00
parent 080b930742
commit e335e33239
1 changed files with 10 additions and 14 deletions
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24
demux/codec_tags.c
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@ -48,20 +48,20 @@ static const char *lookup_tag(int type, uint32_t tag)
return id == AV_CODEC_ID_NONE ? NULL : mp_codec_from_av_codec_id(id);
}
static const char *const pcm_le[] = {"pcm_u8", "pcm_s16le", "pcm_s24le", "pcm_s32le"};
static const char *map_audio_pcm_tag(uint32_t tag, int bits)
static void map_audio_pcm_tag(struct mp_codec_params *c)
{
int bits = c->bits_per_coded_sample;
int bytes = (bits + 7) / 8;
switch (tag) {
switch (c->codec_tag) {
case 0x0: // Microsoft PCM
case 0x1:
case 0xfffe: // MS PCM, Extended
return bytes >= 1 && bytes <= 4 ? pcm_le[bytes - 1] : NULL;
if (bytes >= 1 && bytes <= 4)
mp_set_pcm_codec(c, bytes > 1, false, bytes * 8, false);
break;
case 0x3: // IEEE float
return bits == 64 ? "pcm_f64le" : "pcm_f32le";
default:
return NULL;
mp_set_pcm_codec(c, true, true, bits == 64 ? 64 : 32, false);
break;
}
}
@ -69,12 +69,8 @@ void mp_set_codec_from_tag(struct mp_codec_params *c)
{
c->codec = lookup_tag(c->type, c->codec_tag);
if (c->type == STREAM_AUDIO && c->bits_per_coded_sample) {
const char *codec =
map_audio_pcm_tag(c->codec_tag, c->bits_per_coded_sample);
if (codec)
c->codec = codec;
}
if (c->type == STREAM_AUDIO && c->bits_per_coded_sample)
map_audio_pcm_tag(c);
}
void mp_set_pcm_codec(struct mp_codec_params *c, bool sign, bool is_float,