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| author | Andriy Gelman <andriy.gelman@gmail.com> | 2021-07-03 12:25:28 -0400 |
|---|---|---|
| committer | Andriy Gelman <andriy.gelman@gmail.com> | 2021-07-05 13:00:50 -0400 |
| commit | 78f21f4ec161b9eacb75823740eabd3b87b44efe (patch) | |
| tree | 01993282238766bce9142c821d91611377c7844a | |
| parent | 8257d6dda6cfdd62eeeecb00bb551539949b2297 (diff) | |
avcodec/mjpegdec: Try to continue decoding on zero quant matrix value
A zero value in the quantization matrix is invalid but in practice will
just set the transform coefficient to zero after inverse quantization.
Try to continue decoding if the AV_EF_EXPLODE flag is not set.
Fixes ticket #9287.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>
| -rw-r--r-- | libavcodec/mjpegdec.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 02a987fd0c..8172dca513 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -217,8 +217,10 @@ int ff_mjpeg_decode_dqt(MJpegDecodeContext *s) for (i = 0; i < 64; i++) { s->quant_matrixes[index][i] = get_bits(&s->gb, pr ? 16 : 8); if (s->quant_matrixes[index][i] == 0) { - av_log(s->avctx, AV_LOG_ERROR, "dqt: 0 quant value\n"); - return AVERROR_INVALIDDATA; + int log_level = s->avctx->err_recognition & AV_EF_EXPLODE ? AV_LOG_ERROR : AV_LOG_WARNING; + av_log(s->avctx, log_level, "dqt: 0 quant value\n"); + if (s->avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; } } |