virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-24 13:56:33 +02:00
Code Issues Releases Activity

riff: Perform full lookup on WAVEFORMATEXTENSIBLE subformat guid

Browse Source 
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Peter Ross 2013-04-20 13:36:46 +02:00 committed by Diego Biurrun
parent e544782623
commit a3bf80a5ae
1 changed files with 23 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
libavformat/riff.c
View File

@ -687,7 +687,6 @@ int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
id = avio_rl16(pb);
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->codec_tag = id;
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
codec->bit_rate = avio_rl32(pb) * 8;
@ -696,15 +695,36 @@ int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
codec->bits_per_coded_sample = 8;
} else
codec->bits_per_coded_sample = avio_rl16(pb);
if (id == 0xFFFE) {
codec->codec_tag = 0;
} else {
codec->codec_tag = id;
codec->codec_id = ff_wav_codec_get_id(id,
codec->bits_per_coded_sample);
}
if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
int cbSize = avio_rl16(pb); /* cbSize */
size -= 18;
cbSize = FFMIN(size, cbSize);
if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
ff_asf_guid subformat;
codec->bits_per_coded_sample = avio_rl16(pb);
codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
id = avio_rl32(pb); /* 4 first bytes of GUID */
avio_skip(pb, 12); /* skip end of GUID */
ff_get_guid(pb, &subformat);
if (!memcmp(subformat + 4,
(const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
codec->codec_tag = AV_RL32(subformat);
codec->codec_id = ff_wav_codec_get_id(codec->codec_tag,
codec->bits_per_coded_sample);
} else {
codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids,
subformat);
if (!codec->codec_id)
av_log(codec, AV_LOG_WARNING,
"unknown subformat: "FF_PRI_GUID"\n",
FF_ARG_GUID(subformat));
}
cbSize -= 22;
size -= 22;
}
@ -723,7 +743,6 @@ int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
if (size > 0)
avio_skip(pb, size);
}
codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
/* Channels and sample_rate values are those prior to applying SBR
* and/or PS. */