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avcodec/msvideo1enc: Check all calls to avpriv_elbg_do()

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-09-16 14:19:41 +02:00
parent ad27326e2b
commit 73f47846bd
1 changed files with 13 additions and 7 deletions
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20
libavcodec/msvideo1enc.c
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@ -118,8 +118,10 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
} }
// try to find optimal value to fill whole 4x4 block // try to find optimal value to fill whole 4x4 block
score = 0; score = 0;
avpriv_elbg_do(&c->elbg, c->block, 3, 16, c->avg, ret = avpriv_elbg_do(&c->elbg, c->block, 3, 16, c->avg,
1, 1, c->output, &c->rnd); 1, 1, c->output, &c->rnd);
if (ret < 0)
return ret;
if(c->avg[0] == 1) // red component = 1 will be written as skip code if(c->avg[0] == 1) // red component = 1 will be written as skip code
c->avg[0] = 0; c->avg[0] = 0;
for(j = 0; j < 4; j++){ for(j = 0; j < 4; j++){
@ -138,8 +140,10 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
} }
// search for optimal filling of 2-color block // search for optimal filling of 2-color block
score = 0; score = 0;
avpriv_elbg_do(&c->elbg, c->block, 3, 16, c->codebook, ret = avpriv_elbg_do(&c->elbg, c->block, 3, 16, c->codebook,
2, 1, c->output, &c->rnd); 2, 1, c->output, &c->rnd);
if (ret < 0)
return ret;
// last output value should be always 1, swap codebooks if needed // last output value should be always 1, swap codebooks if needed
if(!c->output[15]){ if(!c->output[15]){
for(i = 0; i < 3; i++) for(i = 0; i < 3; i++)
@ -164,9 +168,11 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
// search for optimal filling of 2-color 2x2 subblocks // search for optimal filling of 2-color 2x2 subblocks
score = 0; score = 0;
for(i = 0; i < 4; i++){ for(i = 0; i < 4; i++){
avpriv_elbg_do(&c->elbg, c->block2 + i * 4 * 3, 3, 4, ret = avpriv_elbg_do(&c->elbg, c->block2 + i * 4 * 3, 3, 4,
c->codebook2 + i * 2 * 3, 2, 1, c->codebook2 + i * 2 * 3, 2, 1,
c->output2 + i*4, &c->rnd); c->output2 + i * 4, &c->rnd);
if (ret < 0)
return ret;
} }
// last value should be always 1, swap codebooks if needed // last value should be always 1, swap codebooks if needed
if(!c->output2[15]){ if(!c->output2[15]){