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avformat/iamf_writer: disallow Opus extradata with mapping family other than 0
Clause 3.11.1 of IAMF[1] states the Opus ID Header should conform to ChannelMappingFamily == 0. [1]https://aomediacodec.github.io/iamf/#opus-specific Signed-off-by: James Almer <jamrial@gmail.com>
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@ -39,7 +39,7 @@ static int update_extradata(IAMFCodecConfig *codec_config)
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switch(codec_config->codec_id) {
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case AV_CODEC_ID_OPUS:
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if (codec_config->extradata_size < 19)
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if (codec_config->extradata_size != 19)
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return AVERROR_INVALIDDATA;
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codec_config->extradata_size -= 8;
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AV_WB8(codec_config->extradata + 0, AV_RL8(codec_config->extradata + 8)); // version
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