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Merge commit '9d5f4f025304ac7c69775179044e6f69f370441a' into release/0.10 

* commit '9d5f4f025304ac7c69775179044e6f69f370441a':
  svq1: do not modify the input packet

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-12 18:51:18 +02:00
parent 6596f5c3aa 9d5f4f0253
commit aed8f48545
2 changed files with 26 additions and 5 deletions
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3
libavcodec/mpegvideo.h
View File

@ -686,6 +686,9 @@ typedef struct MpegEncContext {
int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
uint8_t *pkt_swapped;
int pkt_swapped_allocated;
} MpegEncContext;
#define REBASE_PICTURE(pic, new_ctx, old_ctx) (pic ? \

28
libavcodec/svq1dec.c
View File

@ -644,13 +644,29 @@ static int svq1_decode_frame(AVCodecContext *avctx,
return -1;
/* swap some header bytes (why?) */
if (s->f_code != 0x20) {
uint32_t *src = (uint32_t *) (buf + 4);
if (s->f_code != 0x20) {
uint32_t *src;
for (i=0; i < 4; i++) {
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
if (buf_size < 9 * 4) {
av_log(avctx, AV_LOG_ERROR, "Input packet too small\n");
return AVERROR_INVALIDDATA;
}
av_fast_malloc(s->pkt_swapped, &s->pkt_swapped_allocated,
buf_size);
if (!s->pkt_swapped)
return AVERROR(ENOMEM);
memcpy(s->pkt_swapped, buf, buf_size);
buf = s->pkt_swapped;
init_get_bits(&s->gb, buf, buf_size * 8);
skip_bits(&s->gb, 22);
src = (uint32_t *)(s->pkt_swapped + 4);
for (i = 0; i < 4; i++)
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
}
}
result = svq1_decode_frame_header (&s->gb, s);
@ -804,6 +820,8 @@ static av_cold int svq1_decode_end(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
av_freep(&s->pkt_swapped);
MPV_common_end(s);
return 0;
}