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avcodec/wcmv: prevent frame copying when outputting duplicate frames

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2019-09-03 23:53:46 -03:00
parent 5102999223
commit 343f8d514e
1 changed files with 5 additions and 3 deletions

8
libavcodec/wcmv.c
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@ -45,7 +45,7 @@ static int decode_frame(AVCodecContext *avctx,
{ {
WCMVContext *s = avctx->priv_data; WCMVContext *s = avctx->priv_data;
AVFrame *frame = data; AVFrame *frame = data;
int skip, blocks, zret, ret, intra = 0, bpp = s->bpp; int skip, blocks, zret, ret, intra = 0, flags = 0, bpp = s->bpp;
GetByteContext gb; GetByteContext gb;
uint8_t *dst; uint8_t *dst;
@ -56,11 +56,13 @@ static int decode_frame(AVCodecContext *avctx,
} }
bytestream2_init(&gb, avpkt->data, avpkt->size); bytestream2_init(&gb, avpkt->data, avpkt->size);
blocks = bytestream2_get_le16(&gb);
if (!blocks)
flags |= FF_REGET_BUFFER_FLAG_READONLY;
if ((ret = ff_reget_buffer(avctx, s->prev_frame, 0)) < 0) if ((ret = ff_reget_buffer(avctx, s->prev_frame, flags)) < 0)
return ret; return ret;
blocks = bytestream2_get_le16(&gb);
if (blocks > 5) { if (blocks > 5) {
GetByteContext bgb; GetByteContext bgb;
int x = 0, size; int x = 0, size;