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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-03-20 13:22:40 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-03-20 13:45:19 +0100 |
| commit | eeb792d8629cd62160a6f8821fb058332c04176c (patch) | |
| tree | d2447c2e147b6ecda46d71380713d0655973e532 /libavcodec/pngdec.c | |
| parent | 9dd649c004f9dbb4ae818a7eef1fc4bfc2b9861e (diff) | |
| download | ffmpeg-eeb792d8629cd62160a6f8821fb058332c04176c.tar.gz | |
pngdec: Print error messages for the various failure pathes.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/pngdec.c')
| -rw-r--r-- | libavcodec/pngdec.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 398c48b419..b818b02a48 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -416,12 +416,16 @@ static int decode_frame(AVCodecContext *avctx, if (ret != Z_OK) return -1; for(;;) { - if (bytestream2_get_bytes_left(&s->gb) <= 0) + if (bytestream2_get_bytes_left(&s->gb) <= 0) { + av_log(avctx, AV_LOG_ERROR, "No bytes left\n"); goto fail; + } length = bytestream2_get_be32(&s->gb); - if (length > 0x7fffffff || length > bytestream2_get_bytes_left(&s->gb)) + if (length > 0x7fffffff || length > bytestream2_get_bytes_left(&s->gb)) { + av_log(avctx, AV_LOG_ERROR, "chunk too big\n"); goto fail; + } tag = bytestream2_get_le32(&s->gb); if (avctx->debug & FF_DEBUG_STARTCODE) av_log(avctx, AV_LOG_DEBUG, "png: tag=%c%c%c%c length=%u\n", @@ -437,6 +441,7 @@ static int decode_frame(AVCodecContext *avctx, s->height = bytestream2_get_be32(&s->gb); if(av_image_check_size(s->width, s->height, 0, avctx)){ s->width= s->height= 0; + av_log(avctx, AV_LOG_ERROR, "Invalid image size\n"); goto fail; } s->bit_depth = bytestream2_get_byte(&s->gb); @@ -452,8 +457,10 @@ static int decode_frame(AVCodecContext *avctx, s->compression_type, s->filter_type, s->interlace_type); break; case MKTAG('I', 'D', 'A', 'T'): - if (!(s->state & PNG_IHDR)) + if (!(s->state & PNG_IHDR)) { + av_log(avctx, AV_LOG_ERROR, "IDAT without IHDR\n"); goto fail; + } if (!(s->state & PNG_IDAT)) { /* init image info */ avctx->width = s->width; @@ -587,8 +594,10 @@ static int decode_frame(AVCodecContext *avctx, } break; case MKTAG('I', 'E', 'N', 'D'): - if (!(s->state & PNG_ALLIMAGE)) + if (!(s->state & PNG_ALLIMAGE)) { + av_log(avctx, AV_LOG_ERROR, "IEND without all image\n"); goto fail; + } bytestream2_skip(&s->gb, 4); /* crc */ goto exit_loop; default: |