Move PSNR related functions into vpx_dsp/psnr.c
This makes all metric computation to locate at some place, also gets
rid of duplicate code between vp9 and vp10.
Change-Id: I24a2707d183a2419cd18a8343010adae185ffcd4
diff --git a/vpx_dsp/psnr.c b/vpx_dsp/psnr.c
new file mode 100644
index 0000000..ee803f6
--- /dev/null
+++ b/vpx_dsp/psnr.c
@@ -0,0 +1,298 @@
+/*
+* Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+*
+* Use of this source code is governed by a BSD-style license
+* that can be found in the LICENSE file in the root of the source
+* tree. An additional intellectual property rights grant can be found
+* in the file PATENTS. All contributing project authors may
+* be found in the AUTHORS file in the root of the source tree.
+*/
+
+#include <math.h>
+#include <assert.h>
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/psnr.h"
+#include "vpx_scale/yv12config.h"
+
+
+double vpx_sse_to_psnr(double samples, double peak, double sse) {
+ if (sse > 0.0) {
+ const double psnr = 10.0 * log10(samples * peak * peak / sse);
+ return psnr > MAX_PSNR ? MAX_PSNR : psnr;
+ } else {
+ return MAX_PSNR;
+ }
+}
+
+/* TODO(yaowu): The block_variance calls the unoptimized versions of variance()
+* and highbd_8_variance(). It should not.
+*/
+static void encoder_variance(const uint8_t *a, int a_stride,
+ const uint8_t *b, int b_stride,
+ int w, int h, unsigned int *sse, int *sum) {
+ int i, j;
+
+ *sum = 0;
+ *sse = 0;
+
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w; j++) {
+ const int diff = a[j] - b[j];
+ *sum += diff;
+ *sse += diff * diff;
+ }
+
+ a += a_stride;
+ b += b_stride;
+ }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+static void encoder_highbd_variance64(const uint8_t *a8, int a_stride,
+ const uint8_t *b8, int b_stride,
+ int w, int h, uint64_t *sse,
+ uint64_t *sum) {
+ int i, j;
+
+ uint16_t *a = CONVERT_TO_SHORTPTR(a8);
+ uint16_t *b = CONVERT_TO_SHORTPTR(b8);
+ *sum = 0;
+ *sse = 0;
+
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w; j++) {
+ const int diff = a[j] - b[j];
+ *sum += diff;
+ *sse += diff * diff;
+ }
+ a += a_stride;
+ b += b_stride;
+ }
+}
+
+static void encoder_highbd_8_variance(const uint8_t *a8, int a_stride,
+ const uint8_t *b8, int b_stride,
+ int w, int h,
+ unsigned int *sse, int *sum) {
+ uint64_t sse_long = 0;
+ uint64_t sum_long = 0;
+ encoder_highbd_variance64(a8, a_stride, b8, b_stride, w, h,
+ &sse_long, &sum_long);
+ *sse = (unsigned int)sse_long;
+ *sum = (int)sum_long;
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
+
+static int64_t get_sse(const uint8_t *a, int a_stride,
+ const uint8_t *b, int b_stride,
+ int width, int height) {
+ const int dw = width % 16;
+ const int dh = height % 16;
+ int64_t total_sse = 0;
+ unsigned int sse = 0;
+ int sum = 0;
+ int x, y;
+
+ if (dw > 0) {
+ encoder_variance(&a[width - dw], a_stride, &b[width - dw], b_stride,
+ dw, height, &sse, &sum);
+ total_sse += sse;
+ }
+
+ if (dh > 0) {
+ encoder_variance(&a[(height - dh) * a_stride], a_stride,
+ &b[(height - dh) * b_stride], b_stride,
+ width - dw, dh, &sse, &sum);
+ total_sse += sse;
+ }
+
+ for (y = 0; y < height / 16; ++y) {
+ const uint8_t *pa = a;
+ const uint8_t *pb = b;
+ for (x = 0; x < width / 16; ++x) {
+ vpx_mse16x16(pa, a_stride, pb, b_stride, &sse);
+ total_sse += sse;
+
+ pa += 16;
+ pb += 16;
+ }
+
+ a += 16 * a_stride;
+ b += 16 * b_stride;
+ }
+
+ return total_sse;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+int64_t highbd_get_sse_shift(const uint8_t *a8, int a_stride,
+ const uint8_t *b8, int b_stride,
+ int width, int height,
+ unsigned int input_shift) {
+ const uint16_t *a = CONVERT_TO_SHORTPTR(a8);
+ const uint16_t *b = CONVERT_TO_SHORTPTR(b8);
+ int64_t total_sse = 0;
+ int x, y;
+ for (y = 0; y < height; ++y) {
+ for (x = 0; x < width; ++x) {
+ int64_t diff;
+ diff = (a[x] >> input_shift) - (b[x] >> input_shift);
+ total_sse += diff * diff;
+ }
+ a += a_stride;
+ b += b_stride;
+ }
+ return total_sse;
+}
+
+int64_t highbd_get_sse(const uint8_t *a, int a_stride,
+ const uint8_t *b, int b_stride,
+ int width, int height) {
+ int64_t total_sse = 0;
+ int x, y;
+ const int dw = width % 16;
+ const int dh = height % 16;
+ unsigned int sse = 0;
+ int sum = 0;
+ if (dw > 0) {
+ encoder_highbd_8_variance(&a[width - dw], a_stride,
+ &b[width - dw], b_stride,
+ dw, height, &sse, &sum);
+ total_sse += sse;
+ }
+ if (dh > 0) {
+ encoder_highbd_8_variance(&a[(height - dh) * a_stride], a_stride,
+ &b[(height - dh) * b_stride], b_stride,
+ width - dw, dh, &sse, &sum);
+ total_sse += sse;
+ }
+ for (y = 0; y < height / 16; ++y) {
+ const uint8_t *pa = a;
+ const uint8_t *pb = b;
+ for (x = 0; x < width / 16; ++x) {
+ vpx_highbd_8_mse16x16(pa, a_stride, pb, b_stride, &sse);
+ total_sse += sse;
+ pa += 16;
+ pb += 16;
+ }
+ a += 16 * a_stride;
+ b += 16 * b_stride;
+ }
+ return total_sse;
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
+
+
+int64_t vpx_get_y_sse(const YV12_BUFFER_CONFIG *a,
+ const YV12_BUFFER_CONFIG *b) {
+ assert(a->y_crop_width == b->y_crop_width);
+ assert(a->y_crop_height == b->y_crop_height);
+
+ return get_sse(a->y_buffer, a->y_stride, b->y_buffer, b->y_stride,
+ a->y_crop_width, a->y_crop_height);
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+int64_t vpx_highbd_get_y_sse(const YV12_BUFFER_CONFIG *a,
+ const YV12_BUFFER_CONFIG *b) {
+ assert(a->y_crop_width == b->y_crop_width);
+ assert(a->y_crop_height == b->y_crop_height);
+ assert((a->flags & YV12_FLAG_HIGHBITDEPTH) != 0);
+ assert((b->flags & YV12_FLAG_HIGHBITDEPTH) != 0);
+
+ return highbd_get_sse(a->y_buffer, a->y_stride, b->y_buffer, b->y_stride,
+ a->y_crop_width, a->y_crop_height);
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void calc_highbd_psnr(const YV12_BUFFER_CONFIG *a,
+ const YV12_BUFFER_CONFIG *b,
+ PSNR_STATS *psnr,
+ unsigned int bit_depth,
+ unsigned int in_bit_depth) {
+ const int widths[3] =
+ { a->y_crop_width, a->uv_crop_width, a->uv_crop_width };
+ const int heights[3] =
+ { a->y_crop_height, a->uv_crop_height, a->uv_crop_height };
+ const uint8_t *a_planes[3] = { a->y_buffer, a->u_buffer, a->v_buffer };
+ const int a_strides[3] = { a->y_stride, a->uv_stride, a->uv_stride };
+ const uint8_t *b_planes[3] = { b->y_buffer, b->u_buffer, b->v_buffer };
+ const int b_strides[3] = { b->y_stride, b->uv_stride, b->uv_stride };
+ int i;
+ uint64_t total_sse = 0;
+ uint32_t total_samples = 0;
+ const double peak = (double)((1 << in_bit_depth) - 1);
+ const unsigned int input_shift = bit_depth - in_bit_depth;
+
+ for (i = 0; i < 3; ++i) {
+ const int w = widths[i];
+ const int h = heights[i];
+ const uint32_t samples = w * h;
+ uint64_t sse;
+ if (a->flags & YV12_FLAG_HIGHBITDEPTH) {
+ if (input_shift) {
+ sse = highbd_get_sse_shift(a_planes[i], a_strides[i],
+ b_planes[i], b_strides[i], w, h,
+ input_shift);
+ } else {
+ sse = highbd_get_sse(a_planes[i], a_strides[i],
+ b_planes[i], b_strides[i], w, h);
+ }
+ } else {
+ sse = get_sse(a_planes[i], a_strides[i],
+ b_planes[i], b_strides[i],
+ w, h);
+ }
+ psnr->sse[1 + i] = sse;
+ psnr->samples[1 + i] = samples;
+ psnr->psnr[1 + i] = vpx_sse_to_psnr(samples, peak, (double)sse);
+
+ total_sse += sse;
+ total_samples += samples;
+ }
+
+ psnr->sse[0] = total_sse;
+ psnr->samples[0] = total_samples;
+ psnr->psnr[0] = vpx_sse_to_psnr((double)total_samples, peak,
+ (double)total_sse);
+}
+
+#else // !CONFIG_VP9_HIGHBITDEPTH
+
+void calc_psnr(const YV12_BUFFER_CONFIG *a, const YV12_BUFFER_CONFIG *b,
+ PSNR_STATS *psnr) {
+ static const double peak = 255.0;
+ const int widths[3] = {
+ a->y_crop_width, a->uv_crop_width, a->uv_crop_width };
+ const int heights[3] = {
+ a->y_crop_height, a->uv_crop_height, a->uv_crop_height };
+ const uint8_t *a_planes[3] = { a->y_buffer, a->u_buffer, a->v_buffer };
+ const int a_strides[3] = { a->y_stride, a->uv_stride, a->uv_stride };
+ const uint8_t *b_planes[3] = { b->y_buffer, b->u_buffer, b->v_buffer };
+ const int b_strides[3] = { b->y_stride, b->uv_stride, b->uv_stride };
+ int i;
+ uint64_t total_sse = 0;
+ uint32_t total_samples = 0;
+
+ for (i = 0; i < 3; ++i) {
+ const int w = widths[i];
+ const int h = heights[i];
+ const uint32_t samples = w * h;
+ const uint64_t sse = get_sse(a_planes[i], a_strides[i],
+ b_planes[i], b_strides[i],
+ w, h);
+ psnr->sse[1 + i] = sse;
+ psnr->samples[1 + i] = samples;
+ psnr->psnr[1 + i] = vpx_sse_to_psnr(samples, peak, (double)sse);
+
+ total_sse += sse;
+ total_samples += samples;
+ }
+
+ psnr->sse[0] = total_sse;
+ psnr->samples[0] = total_samples;
+ psnr->psnr[0] = vpx_sse_to_psnr((double)total_samples, peak,
+ (double)total_sse);
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
