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swscale/output: Bias 16bps output calculations to improve non overflowing range

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Fixes: integer overflow
Fixes: ./ffmpeg   -f rawvideo -video_size 66x64 -pixel_format yuva420p10le   -i ~/videos/overflow_input_w66h64.yuva420p10le   -filter_complex "scale=flags=bicubic+full_chroma_int+full_chroma_inp+bitexact+accurate_rnd:in_color_matrix=bt2020:out_color_matrix=bt2020:in_range=full:out_range=full,format=rgba64[out]"   -pixel_format rgba64 -map '[out]'   -y overflow_w66h64.png

Found-by: Drew Dunne <asdunne@google.com>
Tested-by: Drew Dunne <asdunne@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
pull/388/head
Michael Niedermayer 2 years ago
parent c3d36e1b3d
commit 0f0afc7fb5
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 60 additions and 60 deletions
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  1. 120
      libswscale/output.c

120
libswscale/output.c
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@ -1100,8 +1100,8 @@ yuv2rgba64_X_c_template(SwsContext *c, const int16_t *lumFilter,
Y2 -= c->yuv2rgb_y_offset;
Y1 *= c->yuv2rgb_y_coeff;
Y2 *= c->yuv2rgb_y_coeff;
Y1 += 1 << 13; // 21
Y2 += 1 << 13;
Y1 += (1 << 13) - (1 << 29); // 21
Y2 += (1 << 13) - (1 << 29);
// 8 bits: 17 + 13 bits = 30 bits, 16 bits: 17 + 13 bits = 30 bits
R = V * c->yuv2rgb_v2r_coeff;
@ -1109,20 +1109,20 @@ yuv2rgba64_X_c_template(SwsContext *c, const int16_t *lumFilter,
B = U * c->yuv2rgb_u2b_coeff;
// 8 bits: 30 - 22 = 8 bits, 16 bits: 30 bits - 14 = 16 bits
output_pixel(&dest[0], av_clip_uintp2(R_B + Y1, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y1, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y1, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y1) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A1 , 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[6], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[6], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[7], av_clip_uintp2(A2 , 30) >> 14);
dest += 8;
} else {
output_pixel(&dest[3], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[3], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[4], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
dest += 6;
}
}
@ -1160,8 +1160,8 @@ yuv2rgba64_2_c_template(SwsContext *c, const int32_t *buf[2],
Y2 -= c->yuv2rgb_y_offset;
Y1 *= c->yuv2rgb_y_coeff;
Y2 *= c->yuv2rgb_y_coeff;
Y1 += 1 << 13;
Y2 += 1 << 13;
Y1 += (1 << 13) - (1 << 29);
Y2 += (1 << 13) - (1 << 29);
R = V * c->yuv2rgb_v2r_coeff;
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
@ -1175,20 +1175,20 @@ yuv2rgba64_2_c_template(SwsContext *c, const int32_t *buf[2],
A2 += 1 << 13;
}
output_pixel(&dest[0], av_clip_uintp2(R_B + Y1, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y1, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y1, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y1) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A1 , 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[6], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[6], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[7], av_clip_uintp2(A2 , 30) >> 14);
dest += 8;
} else {
output_pixel(&dest[3], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[3], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[4], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
dest += 6;
}
}
@ -1217,8 +1217,8 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
Y2 -= c->yuv2rgb_y_offset;
Y1 *= c->yuv2rgb_y_coeff;
Y2 *= c->yuv2rgb_y_coeff;
Y1 += 1 << 13;
Y2 += 1 << 13;
Y1 += (1 << 13) - (1 << 29);
Y2 += (1 << 13) - (1 << 29);
if (hasAlpha) {
A1 = abuf0[i * 2 ] << 11;
@ -1232,20 +1232,20 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
B = U * c->yuv2rgb_u2b_coeff;
output_pixel(&dest[0], av_clip_uintp2(R_B + Y1, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y1, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y1, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y1) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A1 , 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[6], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[6], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[7], av_clip_uintp2(A2 , 30) >> 14);
dest += 8;
} else {
output_pixel(&dest[3], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[3], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[4], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
dest += 6;
}
}
@ -1263,8 +1263,8 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
Y2 -= c->yuv2rgb_y_offset;
Y1 *= c->yuv2rgb_y_coeff;
Y2 *= c->yuv2rgb_y_coeff;
Y1 += 1 << 13;
Y2 += 1 << 13;
Y1 += (1 << 13) - (1 << 29);
Y2 += (1 << 13) - (1 << 29);
if (hasAlpha) {
A1 = abuf0[i * 2 ] << 11;
@ -1278,20 +1278,20 @@ yuv2rgba64_1_c_template(SwsContext *c, const int32_t *buf0,
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
B = U * c->yuv2rgb_u2b_coeff;
output_pixel(&dest[0], av_clip_uintp2(R_B + Y1, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y1, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y1, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y1) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y1) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A1 , 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[6], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[6], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[7], av_clip_uintp2(A2 , 30) >> 14);
dest += 8;
} else {
output_pixel(&dest[3], av_clip_uintp2(R_B + Y2, 30) >> 14);
output_pixel(&dest[4], av_clip_uintp2( G + Y2, 30) >> 14);
output_pixel(&dest[5], av_clip_uintp2(B_R + Y2, 30) >> 14);
output_pixel(&dest[3], av_clip_uintp2(((R_B + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[4], av_clip_uintp2((( G + Y2) >> 14) + (1<<15), 16));
output_pixel(&dest[5], av_clip_uintp2(((B_R + Y2) >> 14) + (1<<15), 16));
dest += 6;
}
}
@ -1343,7 +1343,7 @@ yuv2rgba64_full_X_c_template(SwsContext *c, const int16_t *lumFilter,
// 8bit: 27 -> 17bit, 16bit: 31 - 14 = 17bit
Y -= c->yuv2rgb_y_offset;
Y *= c->yuv2rgb_y_coeff;
Y += 1 << 13; // 21
Y += (1 << 13) - (1<<29); // 21
// 8bit: 17 + 13bit = 30bit, 16bit: 17 + 13bit = 30bit
R = V * c->yuv2rgb_v2r_coeff;
@ -1351,9 +1351,9 @@ yuv2rgba64_full_X_c_template(SwsContext *c, const int16_t *lumFilter,
B = U * c->yuv2rgb_u2b_coeff;
// 8bit: 30 - 22 = 8bit, 16bit: 30bit - 14 = 16bit
output_pixel(&dest[0], av_clip_uintp2(R_B + Y, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y)>>14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y)>>14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y)>>14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A, 30) >> 14);
dest += 4;
@ -1392,7 +1392,7 @@ yuv2rgba64_full_2_c_template(SwsContext *c, const int32_t *buf[2],
Y -= c->yuv2rgb_y_offset;
Y *= c->yuv2rgb_y_coeff;
Y += 1 << 13;
Y += (1 << 13) - (1 << 29);
R = V * c->yuv2rgb_v2r_coeff;
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
@ -1404,9 +1404,9 @@ yuv2rgba64_full_2_c_template(SwsContext *c, const int32_t *buf[2],
A += 1 << 13;
}
output_pixel(&dest[0], av_clip_uintp2(R_B + Y, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A, 30) >> 14);
dest += 4;
@ -1436,7 +1436,7 @@ yuv2rgba64_full_1_c_template(SwsContext *c, const int32_t *buf0,
Y -= c->yuv2rgb_y_offset;
Y *= c->yuv2rgb_y_coeff;
Y += 1 << 13;
Y += (1 << 13) - (1 << 29);
if (hasAlpha) {
A = abuf0[i] << 11;
@ -1448,9 +1448,9 @@ yuv2rgba64_full_1_c_template(SwsContext *c, const int32_t *buf0,
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
B = U * c->yuv2rgb_u2b_coeff;
output_pixel(&dest[0], av_clip_uintp2(R_B + Y, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A, 30) >> 14);
dest += 4;
@ -1469,7 +1469,7 @@ yuv2rgba64_full_1_c_template(SwsContext *c, const int32_t *buf0,
Y -= c->yuv2rgb_y_offset;
Y *= c->yuv2rgb_y_coeff;
Y += 1 << 13;
Y += (1 << 13) - (1 << 29);
if (hasAlpha) {
A = abuf0[i] << 11;
@ -1481,9 +1481,9 @@ yuv2rgba64_full_1_c_template(SwsContext *c, const int32_t *buf0,
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
B = U * c->yuv2rgb_u2b_coeff;
output_pixel(&dest[0], av_clip_uintp2(R_B + Y, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y, 30) >> 14);
output_pixel(&dest[0], av_clip_uintp2(((R_B + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[1], av_clip_uintp2((( G + Y) >> 14) + (1<<15), 16));
output_pixel(&dest[2], av_clip_uintp2(((B_R + Y) >> 14) + (1<<15), 16));
if (eightbytes) {
output_pixel(&dest[3], av_clip_uintp2(A, 30) >> 14);
dest += 4;

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