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| author | James Almer <jamrial@gmail.com> | 2025-06-05 21:07:14 -0300 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2025-06-08 18:36:09 -0300 |
| commit | efbcd312060a9598e7e63f0e8ca8515d8ce109ef (patch) | |
| tree | b6fb088ca37b3d362dea6a709919fba826f0210d | |
| parent | 49e52ca24ff93702188375c058c20e7db4ff0cb5 (diff) | |
| download | ffmpeg-efbcd312060a9598e7e63f0e8ca8515d8ce109ef.tar.gz | |
avcodec/ac3_parser: use a padded buffer in av_ac3_parse_header()
The GetBitContext API requires the buffer to be padded, and the documentation for
av_ac3_parse_header() does not specify it, so use a temporary local buffer.
Signed-off-by: James Almer <jamrial@gmail.com>
| -rw-r--r-- | libavcodec/ac3_parser.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c index 69989690dd..1d9a40a8d9 100644 --- a/libavcodec/ac3_parser.c +++ b/libavcodec/ac3_parser.c @@ -202,9 +202,13 @@ int av_ac3_parse_header(const uint8_t *buf, size_t size, { GetBitContext gb; AC3HeaderInfo hdr; + uint8_t tmp[32 + AV_INPUT_BUFFER_PADDING_SIZE]; int err; - err = init_get_bits8(&gb, buf, size); + size = FFMIN(32, size); + memcpy(tmp, buf, size); + memset(tmp + size, 0, AV_INPUT_BUFFER_PADDING_SIZE); + err = init_get_bits8(&gb, tmp, size); if (err < 0) return AVERROR_INVALIDDATA; err = ff_ac3_parse_header(&gb, &hdr); |