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avformat/riffdec: don't unconditionally overwrite WAVEFORMATEXTENSIBLE layout

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Do it only if the value conflicts with the previous channels value.

Fixes ticket #9912

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2022-09-10 00:36:34 -03:00
parent f1b35fc8f0
commit 60d8c2019f
1 changed files with 8 additions and 3 deletions
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11
libavformat/riffdec.c
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@ -102,6 +102,8 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
return AVERROR_INVALIDDATA;
}
av_channel_layout_uninit(&par->ch_layout);
par->codec_type = AVMEDIA_TYPE_AUDIO;
if (!big_endian) {
id = avio_rl16(pb);
@ -189,9 +191,12 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
if (par->codec_id == AV_CODEC_ID_ADPCM_G726 && par->sample_rate)
par->bits_per_coded_sample = par->bit_rate / par->sample_rate;
av_channel_layout_uninit(&par->ch_layout);
par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
par->ch_layout.nb_channels = channels;
/* ignore WAVEFORMATEXTENSIBLE layout if different from channel count */
if (channels != par->ch_layout.nb_channels) {
av_channel_layout_uninit(&par->ch_layout);
par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
par->ch_layout.nb_channels = channels;
}
return 0;
}