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@@ -912,6 +912,11 @@ static int decode_fctl_chunk(AVCodecContext *avctx, PNGDecContext *s, |
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cur_w > s->width - x_offset|| cur_h > s->height - y_offset) |
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return AVERROR_INVALIDDATA; |
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if (blend_op != APNG_BLEND_OP_OVER && blend_op != APNG_BLEND_OP_SOURCE) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid blend_op %d\n", blend_op); |
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return AVERROR_INVALIDDATA; |
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} |
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if (sequence_number == 0 && dispose_op == APNG_DISPOSE_OP_PREVIOUS) { |
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// No previous frame to revert to for the first frame |
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// Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND |
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