From 0f8e4dfe6ed913741e4711c6e7deb3272de2f164 Mon Sep 17 00:00:00 2001 From: Alex Converse Date: Sun, 7 Mar 2010 21:16:44 +0000 Subject: [PATCH] Increase FF_INPUT_BUFFER_PADDING_SIZE to 64. The purpose of this is to give decoders a reasonable amount of buffer to work with before needing to check for overreads. Originally committed as revision 22288 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/avcodec.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 31569d3..3e0e291 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -424,12 +424,14 @@ enum SampleFormat { /** * Required number of additionally allocated bytes at the end of the input bitstream for decoding. - * This is mainly needed because some optimized bitstream readers read - * 32 or 64 bit at once and could read over the end.
+ * The first 8 bytes are needed because some optimized bitstream readers read + * 32 or 64 bit at once and could read over the end. The remainder is to give + * decoders a reasonable amount of distance to work with before checking for + * buffer overreads.
* Note: If the first 23 bits of the additional bytes are not 0, then damaged * MPEG bitstreams could cause overread and segfault. */ -#define FF_INPUT_BUFFER_PADDING_SIZE 8 +#define FF_INPUT_BUFFER_PADDING_SIZE 64 /** * minimum encoding buffer size -- 2.7.4