diff options
Diffstat (limited to 'src/3rdparty/libwebp/src/dsp/enc.c')
| -rw-r--r-- | src/3rdparty/libwebp/src/dsp/enc.c | 69 |
1 files changed, 66 insertions, 3 deletions
diff --git a/src/3rdparty/libwebp/src/dsp/enc.c b/src/3rdparty/libwebp/src/dsp/enc.c index 8899d50..f639f55 100644 --- a/src/3rdparty/libwebp/src/dsp/enc.c +++ b/src/3rdparty/libwebp/src/dsp/enc.c @@ -69,7 +69,7 @@ static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, // Convert coefficients to bin. for (k = 0; k < 16; ++k) { - const int v = abs(out[k]) >> 3; // TODO(skal): add rounding? + const int v = abs(out[k]) >> 3; const int clipped_value = clip_max(v, MAX_COEFF_THRESH); ++distribution[clipped_value]; } @@ -559,6 +559,7 @@ static int SSE4x4(const uint8_t* a, const uint8_t* b) { // Hadamard transform // Returns the weighted sum of the absolute value of transformed coefficients. +// w[] contains a row-major 4 by 4 symmetric matrix. static int TTransform(const uint8_t* in, const uint16_t* w) { int sum = 0; int tmp[16]; @@ -636,7 +637,7 @@ static int QuantizeBlock(int16_t in[16], int16_t out[16], int level = QUANTDIV(coeff, iQ, B); if (level > MAX_LEVEL) level = MAX_LEVEL; if (sign) level = -level; - in[j] = level * Q; + in[j] = level * (int)Q; out[n] = level; if (level) last = n; } else { @@ -670,7 +671,7 @@ static int QuantizeBlockWHT(int16_t in[16], int16_t out[16], int level = QUANTDIV(coeff, iQ, B); if (level > MAX_LEVEL) level = MAX_LEVEL; if (sign) level = -level; - in[j] = level * Q; + in[j] = level * (int)Q; out[n] = level; if (level) last = n; } else { @@ -702,6 +703,68 @@ static void Copy16x8(const uint8_t* src, uint8_t* dst) { } //------------------------------------------------------------------------------ + +static void SSIMAccumulateClipped(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int xo, int yo, int W, int H, + VP8DistoStats* const stats) { + const int ymin = (yo - VP8_SSIM_KERNEL < 0) ? 0 : yo - VP8_SSIM_KERNEL; + const int ymax = (yo + VP8_SSIM_KERNEL > H - 1) ? H - 1 + : yo + VP8_SSIM_KERNEL; + const int xmin = (xo - VP8_SSIM_KERNEL < 0) ? 0 : xo - VP8_SSIM_KERNEL; + const int xmax = (xo + VP8_SSIM_KERNEL > W - 1) ? W - 1 + : xo + VP8_SSIM_KERNEL; + int x, y; + src1 += ymin * stride1; + src2 += ymin * stride2; + for (y = ymin; y <= ymax; ++y, src1 += stride1, src2 += stride2) { + for (x = xmin; x <= xmax; ++x) { + const int s1 = src1[x]; + const int s2 = src2[x]; + stats->w += 1; + stats->xm += s1; + stats->ym += s2; + stats->xxm += s1 * s1; + stats->xym += s1 * s2; + stats->yym += s2 * s2; + } + } +} + +static void SSIMAccumulate(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + VP8DistoStats* const stats) { + int x, y; + for (y = 0; y <= 2 * VP8_SSIM_KERNEL; ++y, src1 += stride1, src2 += stride2) { + for (x = 0; x <= 2 * VP8_SSIM_KERNEL; ++x) { + const int s1 = src1[x]; + const int s2 = src2[x]; + stats->w += 1; + stats->xm += s1; + stats->ym += s2; + stats->xxm += s1 * s1; + stats->xym += s1 * s2; + stats->yym += s2 * s2; + } + } +} + +VP8SSIMAccumulateFunc VP8SSIMAccumulate; +VP8SSIMAccumulateClippedFunc VP8SSIMAccumulateClipped; + +static volatile VP8CPUInfo ssim_last_cpuinfo_used = + (VP8CPUInfo)&ssim_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8SSIMDspInit(void) { + if (ssim_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8SSIMAccumulate = SSIMAccumulate; + VP8SSIMAccumulateClipped = SSIMAccumulateClipped; + + ssim_last_cpuinfo_used = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ // Initialization // Speed-critical function pointers. We have to initialize them to the default |