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lavc/lscrdec: use ff_reget_buffer() 

It is simpler and more efficient.

Suggested-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Anton Khirnov 2021-02-24 09:38:22 +01:00
parent eed2125f3f
commit d3d99a0a06
1 changed files with 6 additions and 11 deletions
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17
libavcodec/lscrdec.c
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@ -105,7 +105,7 @@ static int decode_frame_lscr(AVCodecContext *avctx,
{
LSCRContext *const s = avctx->priv_data;
GetByteContext *gb = &s->gb;
AVFrame *frame = data;
AVFrame *frame = s->last_picture;
int ret, nb_blocks, offset = 0;
if (avpkt->size < 2)
@ -115,18 +115,14 @@ static int decode_frame_lscr(AVCodecContext *avctx,
bytestream2_init(gb, avpkt->data, avpkt->size);
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
nb_blocks = bytestream2_get_le16(gb);
if (bytestream2_get_bytes_left(gb) < 2 + nb_blocks * (12 + 8))
return AVERROR_INVALIDDATA;
if (s->last_picture->data[0]) {
ret = av_frame_copy(frame, s->last_picture);
if (ret < 0)
return ret;
}
ret = ff_reget_buffer(avctx, frame,
nb_blocks ? 0 : FF_REGET_BUFFER_FLAG_READONLY);
if (ret < 0)
return ret;
for (int b = 0; b < nb_blocks; b++) {
int x, y, x2, y2, w, h, left;
@ -216,8 +212,7 @@ static int decode_frame_lscr(AVCodecContext *avctx,
frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
av_frame_unref(s->last_picture);
if ((ret = av_frame_ref(s->last_picture, frame)) < 0)
if ((ret = av_frame_ref(data, frame)) < 0)
return ret;
*got_frame = 1;