avformat/qoadec: Check ffio_ensure_seekback()
Fixes Coverity issue #1598406. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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@ -41,6 +41,7 @@ static int qoa_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVStream *st;
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int ret;
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st = avformat_new_stream(s, NULL);
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if (!st)
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@ -52,7 +53,9 @@ static int qoa_read_header(AVFormatContext *s)
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st->duration = avio_rb32(pb);
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st->start_time = 0;
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ffio_ensure_seekback(pb, 4);
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ret = ffio_ensure_seekback(pb, 4);
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if (ret < 0)
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return ret;
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st->codecpar->ch_layout.nb_channels = avio_r8(pb);
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if (st->codecpar->ch_layout.nb_channels == 0)
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return AVERROR_INVALIDDATA;
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