mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-13 18:55:08 +00:00
diracdec: check dimensions against chroma format.
Fixes out of array reads Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
parent
f5d6b0c9c2
commit
ea6da80cb4
@ -119,6 +119,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
|
||||
AVRational frame_rate = {0,0};
|
||||
unsigned luma_depth = 8, luma_offset = 16;
|
||||
int idx;
|
||||
int chroma_x_shift, chroma_y_shift;
|
||||
|
||||
/* [DIRAC_STD] 10.3.2 Frame size. frame_size(video_params) */
|
||||
/* [DIRAC_STD] custom_dimensions_flag */
|
||||
@ -235,6 +236,12 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
|
||||
av_log(avctx, AV_LOG_WARNING, "Bitdepth greater than 8\n");
|
||||
|
||||
avctx->pix_fmt = dirac_pix_fmt[!luma_offset][source->chroma_format];
|
||||
avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift);
|
||||
if (!(source->width % (1<<chroma_x_shift)) || !(source->height % (1<<chroma_y_shift))) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Dimensions must be a integer multiply of the chroma subsampling\n");
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
|
||||
/* [DIRAC_STD] 10.3.9 Colour specification. colour_spec(video_params) */
|
||||
if (get_bits1(gb)) { /* [DIRAC_STD] custom_colour_spec_flag */
|
||||
|
Loading…
Reference in New Issue
Block a user