From 0f0afc7fb5d30c40108d81b320823d8f5c9fbedc Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 2 Nov 2022 20:00:38 +0100 Subject: [PATCH] swscale/output: Bias 16bps output calculations to improve non overflowing range 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 Tested-by: Drew Dunne Signed-off-by: Michael Niedermayer --- libswscale/output.c | 120 ++++++++++++++++++++++---------------------- 1 file changed, 60 insertions(+), 60 deletions(-) diff --git a/libswscale/output.c b/libswscale/output.c index 0e1c1225a0..df4647adde 100644 --- a/libswscale/output.c +++ b/libswscale/output.c @@ -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;