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mjpegb: don't return 0 at the end of frame decoding.

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Return 0 indicates "please return the same data again", i.e. it causes
an infinite loop. Instead, return that we consumed the buffer if we
finished decoding succesfully, or return an error if an error occurred.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Ronald S. Bultje
2012-02-17 16:27:36 -08:00
parent c7e8639c70
commit 74699ac8c8
1 changed files with 2 additions and 2 deletions
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4
libavcodec/mjpegbdec.c
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@@ -69,7 +69,7 @@ read_header:
if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g')) if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g'))
{ {
av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n"); av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n");
return 0; return AVERROR_INVALIDDATA;
} }
field_size = get_bits_long(&hgb, 32); /* field size */ field_size = get_bits_long(&hgb, 32); /* field size */
@@ -149,7 +149,7 @@ read_header:
picture->quality*= FF_QP2LAMBDA; picture->quality*= FF_QP2LAMBDA;
} }
return buf_ptr - buf; return buf_size;
} }
AVCodec ff_mjpegb_decoder = { AVCodec ff_mjpegb_decoder = {