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lavf/riff: Support decoding Ambisonic wav files.

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Reported and tested by Andy Furniss, adf d lists at gmail
This commit is contained in:
Carl Eugen Hoyos 2015-09-16 14:03:13 +02:00
parent 2fc552b629
commit f17ca46009
2 changed files with 4 additions and 0 deletions
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2
libavformat/riff.h
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@ -107,6 +107,8 @@ extern const AVCodecGuid ff_codec_wav_guids[];
#define FF_MEDIASUBTYPE_BASE_GUID \
0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71
#define FF_AMBISONIC_BASE_GUID \
0x21, 0x07, 0xD3, 0x11, 0x86, 0x44, 0xC8, 0xC1, 0xCA, 0x00, 0x00, 0x00
static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
{

2
libavformat/riffdec.c
View File

@ -69,6 +69,8 @@ static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)
ff_get_guid(pb, &subformat);
if (!memcmp(subformat + 4,
(const uint8_t[]){ FF_AMBISONIC_BASE_GUID }, 12) ||
!memcmp(subformat + 4,
(const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
c->codec_tag = AV_RL32(subformat);
c->codec_id = ff_wav_codec_get_id(c->codec_tag,