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dxtory: correctly handle YUV slices with average odd height

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This commit is contained in:
Kostya Shishkov 2014-01-18 14:34:30 +01:00
parent ade4ecb42d
commit e91a3f1bdb
1 changed files with 12 additions and 6 deletions
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18
libavcodec/dxtory.c
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@ -118,7 +118,8 @@ static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
{
GetByteContext gb;
GetBitContext gb2;
int nslices, slice, slice_height;
int nslices, slice, slice_height, ref_slice_height;
int cur_y, next_y;
uint32_t off, slice_size;
uint8_t *Y, *U, *V;
int ret;
@ -137,10 +138,10 @@ static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
return AVERROR(ENOSYS);
}
slice_height = avctx->height / nslices;
if ((avctx->width & 1) || (slice_height & 1)) {
avpriv_request_sample(avctx, "slice dimensions %dx%d",
avctx->width, slice_height);
ref_slice_height = avctx->height / nslices;
if ((avctx->width & 1) || (avctx->height & 1)) {
avpriv_request_sample(avctx, "Frame dimensions %dx%d",
avctx->width, avctx->height);
}
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
@ -151,8 +152,11 @@ static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
U = pic->data[1];
V = pic->data[2];
cur_y = 0;
next_y = ref_slice_height;
for (slice = 0; slice < nslices; slice++) {
slice_size = bytestream2_get_le32(&gb);
slice_size = bytestream2_get_le32(&gb);
slice_height = (next_y & ~1) - (cur_y & ~1);
if (slice_size > src_size - off) {
av_log(avctx, AV_LOG_ERROR,
"invalid slice size %d (only %d bytes left)\n",
@ -177,6 +181,8 @@ static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
U += pic->linesize[1] * (slice_height >> 1);
V += pic->linesize[2] * (slice_height >> 1);
off += slice_size;
cur_y = next_y;
next_y += ref_slice_height;
}
return 0;