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-rw-r--r--media/libvpx/vp9/encoder/vp9_aq_variance.c207
1 files changed, 207 insertions, 0 deletions
diff --git a/media/libvpx/vp9/encoder/vp9_aq_variance.c b/media/libvpx/vp9/encoder/vp9_aq_variance.c
new file mode 100644
index 000000000..f072717f1
--- /dev/null
+++ b/media/libvpx/vp9/encoder/vp9_aq_variance.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2013 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 "vpx_ports/mem.h"
+
+#include "vp9/encoder/vp9_aq_variance.h"
+
+#include "vp9/common/vp9_seg_common.h"
+
+#include "vp9/encoder/vp9_ratectrl.h"
+#include "vp9/encoder/vp9_rd.h"
+#include "vp9/encoder/vp9_segmentation.h"
+#include "vp9/common/vp9_systemdependent.h"
+
+#define ENERGY_MIN (-4)
+#define ENERGY_MAX (1)
+#define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN + 1)
+#define ENERGY_IN_BOUNDS(energy)\
+ assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
+
+static const double rate_ratio[MAX_SEGMENTS] =
+ {2.5, 2.0, 1.5, 1.0, 0.75, 1.0, 1.0, 1.0};
+static const int segment_id[ENERGY_SPAN] = {0, 1, 1, 2, 3, 4};
+
+#define SEGMENT_ID(i) segment_id[(i) - ENERGY_MIN]
+
+DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = {0};
+#if CONFIG_VP9_HIGHBITDEPTH
+DECLARE_ALIGNED(16, static const uint16_t, vp9_highbd_64_zeros[64]) = {0};
+#endif
+
+unsigned int vp9_vaq_segment_id(int energy) {
+ ENERGY_IN_BOUNDS(energy);
+ return SEGMENT_ID(energy);
+}
+
+void vp9_vaq_frame_setup(VP9_COMP *cpi) {
+ VP9_COMMON *cm = &cpi->common;
+ struct segmentation *seg = &cm->seg;
+ int i;
+
+ if (cm->frame_type == KEY_FRAME ||
+ cpi->refresh_alt_ref_frame ||
+ (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
+ vp9_enable_segmentation(seg);
+ vp9_clearall_segfeatures(seg);
+
+ seg->abs_delta = SEGMENT_DELTADATA;
+
+ vp9_clear_system_state();
+
+ for (i = 0; i < MAX_SEGMENTS; ++i) {
+ int qindex_delta =
+ vp9_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
+ rate_ratio[i], cm->bit_depth);
+
+ // We don't allow qindex 0 in a segment if the base value is not 0.
+ // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment
+ // Q delta is sometimes applied without going back around the rd loop.
+ // This could lead to an illegal combination of partition size and q.
+ if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
+ qindex_delta = -cm->base_qindex + 1;
+ }
+
+ // No need to enable SEG_LVL_ALT_Q for this segment.
+ if (rate_ratio[i] == 1.0) {
+ continue;
+ }
+
+ vp9_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta);
+ vp9_enable_segfeature(seg, i, SEG_LVL_ALT_Q);
+ }
+ }
+}
+
+/* TODO(agrange, paulwilkins): The block_variance calls the unoptimized versions
+ * of variance() and highbd_8_variance(). It should not.
+ */
+static void aq_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 aq_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 aq_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;
+ aq_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 unsigned int block_variance(VP9_COMP *cpi, MACROBLOCK *x,
+ BLOCK_SIZE bs) {
+ MACROBLOCKD *xd = &x->e_mbd;
+ unsigned int var, sse;
+ int right_overflow = (xd->mb_to_right_edge < 0) ?
+ ((-xd->mb_to_right_edge) >> 3) : 0;
+ int bottom_overflow = (xd->mb_to_bottom_edge < 0) ?
+ ((-xd->mb_to_bottom_edge) >> 3) : 0;
+
+ if (right_overflow || bottom_overflow) {
+ const int bw = 8 * num_8x8_blocks_wide_lookup[bs] - right_overflow;
+ const int bh = 8 * num_8x8_blocks_high_lookup[bs] - bottom_overflow;
+ int avg;
+#if CONFIG_VP9_HIGHBITDEPTH
+ if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+ aq_highbd_8_variance(x->plane[0].src.buf, x->plane[0].src.stride,
+ CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros), 0, bw, bh,
+ &sse, &avg);
+ sse >>= 2 * (xd->bd - 8);
+ avg >>= (xd->bd - 8);
+ } else {
+ aq_variance(x->plane[0].src.buf, x->plane[0].src.stride,
+ vp9_64_zeros, 0, bw, bh, &sse, &avg);
+ }
+#else
+ aq_variance(x->plane[0].src.buf, x->plane[0].src.stride,
+ vp9_64_zeros, 0, bw, bh, &sse, &avg);
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ var = sse - (((int64_t)avg * avg) / (bw * bh));
+ return (256 * var) / (bw * bh);
+ } else {
+#if CONFIG_VP9_HIGHBITDEPTH
+ if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+ var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+ x->plane[0].src.stride,
+ CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros),
+ 0, &sse);
+ } else {
+ var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+ x->plane[0].src.stride,
+ vp9_64_zeros, 0, &sse);
+ }
+#else
+ var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+ x->plane[0].src.stride,
+ vp9_64_zeros, 0, &sse);
+#endif // CONFIG_VP9_HIGHBITDEPTH
+ return (256 * var) >> num_pels_log2_lookup[bs];
+ }
+}
+
+double vp9_log_block_var(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
+ unsigned int var = block_variance(cpi, x, bs);
+ vp9_clear_system_state();
+ return log(var + 1.0);
+}
+
+#define DEFAULT_E_MIDPOINT 10.0
+int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
+ double energy;
+ double energy_midpoint;
+ vp9_clear_system_state();
+ energy_midpoint =
+ (cpi->oxcf.pass == 2) ? cpi->twopass.mb_av_energy : DEFAULT_E_MIDPOINT;
+ energy = vp9_log_block_var(cpi, x, bs) - energy_midpoint;
+ return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 08:20:03 +0000