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Code Issues Releases Activity

avcodec/svq1dec: fix runtime error: applying non-zero offset 4 to null pointer

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Paul B Mahol
2023-09-23 09:57:06 +02:00
parent 5d98259841
commit cb26b85953
1 changed files with 3 additions and 1 deletions
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4
libavcodec/svq1dec.c
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@@ -282,7 +282,7 @@ static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks); SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
for (y = 0; y < height; y++) { for (y = 0; y < height; y++) {
for (x = 0; x < width / 4; x++, codebook++) { for (x = 0; x < width / 4; x++) {
n3 = dst[x]; n3 = dst[x];
/* add mean value to vector */ /* add mean value to vector */
n1 = n4 + ((n3 & 0xFF00FF00) >> 8); n1 = n4 + ((n3 & 0xFF00FF00) >> 8);
@@ -290,6 +290,8 @@ static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
SVQ1_ADD_CODEBOOK() SVQ1_ADD_CODEBOOK()
/* store result */ /* store result */
dst[x] = n1 << 8 | n2; dst[x] = n1 << 8 | n2;
if (codebook != NULL)
codebook++;
} }
dst += pitch / 4; dst += pitch / 4;
} }