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avcodec/roqvideoenc: Avoid intermediate buffer

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2021-02-27 17:56:04 +01:00
parent 9b776cd542
commit ed89ebb12e
1 changed files with 8 additions and 17 deletions
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25
libavcodec/roqvideoenc.c
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@ -773,7 +773,7 @@ static void reconstruct_and_encode_image(RoqEncContext *enc,
/**
* Create a single YUV cell from a 2x2 section of the image
*/
static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
static inline void frame_block_to_cell(int *block, uint8_t * const *data,
int top, int left, const int *stride)
{
int i, j, u=0, v=0;
@ -787,14 +787,14 @@ static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
v += data[2][x];
}
*block++ = (u+2)/4;
*block++ = (v+2)/4;
*block++ = (u + 2) / 4 * CHROMA_BIAS;
*block++ = (v + 2) / 4 * CHROMA_BIAS;
}
/**
* Create YUV clusters for the entire image
*/
static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters)
static void create_clusters(const AVFrame *frame, int w, int h, int *points)
{
int i, j, k, l;
@ -802,9 +802,9 @@ static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClus
for (j=0; j<w; j+=4) {
for (k=0; k < 2; k++)
for (l=0; l < 2; l++)
frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data,
frame_block_to_cell(points + (l + 2*k)*6, frame->data,
i+2*k, j+2*l, frame->linesize);
yuvClusters += 24;
points += 24;
}
}
@ -853,23 +853,15 @@ static int generate_new_codebooks(RoqEncContext *enc, RoqTempdata *tempData)
int max = roq->width * roq->height / 16;
uint8_t mb2[3*4];
roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4);
uint8_t *yuvClusters=av_malloc_array(max, sizeof(int)*6*4);
int *points = enc->points;
int bias;
if (!results4 || !yuvClusters) {
if (!results4) {
ret = AVERROR(ENOMEM);
goto out;
}
/* Subsample YUV data */
create_clusters(enc->frame_to_enc, roq->width, roq->height, yuvClusters);
/* Cast to integer and apply chroma bias */
for (i=0; i<max*24; i++) {
bias = ((i%6)<4) ? 1 : CHROMA_BIAS;
points[i] = bias*yuvClusters[i];
}
create_clusters(enc->frame_to_enc, roq->width, roq->height, points);
/* Create 4x4 codebooks */
if ((ret = generate_codebook(enc, points, max,
@ -902,7 +894,6 @@ static int generate_new_codebooks(RoqEncContext *enc, RoqTempdata *tempData)
codebooks->unpacked_cb4_enlarged + i*8*8*3);
}
out:
av_free(yuvClusters);
av_free(results4);
return ret;
}