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avcodec/ivi_dsp: Fix multiple runtime error: left shift of negative value -71

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Fixes: 1734/clusterfuzz-testcase-minimized-5385630815092736

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
pull/28/merge
Michael Niedermayer 8 years ago
parent a1cbf53c56
commit 8fb00b3e85
1 changed files with 15 additions and 15 deletions
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  1. 30
      libavcodec/ivi_dsp.c

30
libavcodec/ivi_dsp.c
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@ -116,10 +116,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
b0_2 = b0_ptr[pitch+indx+1];
tmp1 = tmp0 + b0_1;
p0 = tmp0 << 4;
p1 = tmp1 << 3;
p2 = (tmp0 + tmp2) << 3;
p3 = (tmp1 + tmp2 + b0_2) << 2;
p0 = tmp0 * 16;
p1 = tmp1 * 8;
p2 = (tmp0 + tmp2) * 8;
p3 = (tmp1 + tmp2 + b0_2) * 4;
}
/* process the HL-band by applying HPF vertically and LPF horizontally */
@ -132,10 +132,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
tmp2 = tmp1 - tmp0*6 + b1_3;
b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch+indx+1];
p0 += (tmp0 + tmp1) << 3;
p1 += (tmp0 + tmp1 + b1_1 + b1_2) << 2;
p2 += tmp2 << 2;
p3 += (tmp2 + b1_3) << 1;
p0 += (tmp0 + tmp1) * 8;
p1 += (tmp0 + tmp1 + b1_1 + b1_2) * 4;
p2 += tmp2 * 4;
p3 += (tmp2 + b1_3) * 2;
}
/* process the LH-band by applying LPF vertically and HPF horizontally */
@ -146,10 +146,10 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
tmp0 = b2_1 + b2_2;
tmp1 = b2_1 - b2_2*6 + b2_3;
p0 += tmp0 << 3;
p1 += tmp1 << 2;
p2 += (tmp0 + b2_4 + b2_5) << 2;
p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) << 1;
p0 += tmp0 * 8;
p1 += tmp1 * 4;
p2 += (tmp0 + b2_4 + b2_5) * 4;
p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) * 2;
}
/* process the HH-band by applying HPF both vertically and horizontally */
@ -163,9 +163,9 @@ void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
b3_9 = b3_3 - b3_6*6 + b3_ptr[pitch+indx+1];
p0 += (tmp0 + tmp1) << 2;
p1 += (tmp0 - tmp1*6 + tmp2) << 1;
p2 += (b3_7 + b3_8) << 1;
p0 += (tmp0 + tmp1) * 4;
p1 += (tmp0 - tmp1*6 + tmp2) * 2;
p2 += (b3_7 + b3_8) * 2;
p3 += b3_7 - b3_8*6 + b3_9;
}

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