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Code Issues Releases Activity

avcodec/svq1dec: use av_fast_padded_malloc() for allocation pmv only when necessary

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This commit is contained in:
Paul B Mahol 2021-03-02 15:03:33 +01:00
parent 98c5d6b845
commit 2fc309e699
1 changed files with 15 additions and 14 deletions
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29
libavcodec/svq1dec.c
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@ -65,6 +65,9 @@ typedef struct SVQ1Context {
uint8_t *pkt_swapped;
int pkt_swapped_allocated;
svq1_pmv *pmv;
int pmv_allocated;
int width;
int height;
int frame_code;
@ -622,7 +625,6 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
AVFrame *cur = data;
uint8_t *current;
int result, i, x, y, width, height;
svq1_pmv *pmv;
int ret;
/* initialize bit buffer */
@ -682,8 +684,8 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
if (result < 0)
return result;
pmv = av_malloc_array(FFALIGN(s->width, 16) / 8 + 3, sizeof(*pmv));
if (!pmv)
av_fast_padded_malloc(&s->pmv, &s->pmv_allocated, (FFALIGN(s->width, 16) / 8 + 3) * sizeof(*s->pmv));
if (!s->pmv)
return AVERROR(ENOMEM);
/* decode y, u and v components */
@ -711,7 +713,7 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
av_log(avctx, AV_LOG_ERROR,
"Error in svq1_decode_block %i (keyframe)\n",
result);
goto err;
return result;
}
}
current += 16 * linesize;
@ -722,28 +724,27 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
if (!previous ||
s->prev->width != s->width || s->prev->height != s->height) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
result = AVERROR_INVALIDDATA;
goto err;
return AVERROR_INVALIDDATA;
}
memset(pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
memset(s->pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
for (y = 0; y < height; y += 16) {
for (x = 0; x < width; x += 16) {
result = svq1_decode_delta_block(avctx, &s->hdsp,
&s->gb, &current[x],
previous, linesize,
pmv, x, y, width, height);
s->pmv, x, y, width, height);
if (result != 0) {
ff_dlog(avctx,
"Error in svq1_decode_delta_block %i\n",
result);
goto err;
return result;
}
}
pmv[0].x =
pmv[0].y = 0;
s->pmv[0].x =
s->pmv[0].y = 0;
current += 16 * linesize;
}
@ -754,14 +755,12 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
av_frame_unref(s->prev);
result = av_frame_ref(s->prev, cur);
if (result < 0)
goto err;
return result;
}
*got_frame = 1;
result = buf_size;
err:
av_free(pmv);
return result;
}
@ -831,6 +830,8 @@ static av_cold int svq1_decode_end(AVCodecContext *avctx)
av_frame_free(&s->prev);
av_freep(&s->pkt_swapped);
s->pkt_swapped_allocated = 0;
av_freep(&s->pmv);
s->pmv_allocated = 0;
return 0;
}