Index: source/libvpx/vp9/encoder/vp9_aq_variance.c |
=================================================================== |
--- source/libvpx/vp9/encoder/vp9_aq_variance.c (revision 0) |
+++ source/libvpx/vp9/encoder/vp9_aq_variance.c (revision 0) |
@@ -0,0 +1,148 @@ |
+/* |
+ * 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 "vp9/encoder/vp9_aq_variance.h" |
+ |
+#include "vp9/common/vp9_seg_common.h" |
+ |
+#include "vp9/encoder/vp9_ratectrl.h" |
+#include "vp9/encoder/vp9_rdopt.h" |
+#include "vp9/encoder/vp9_segmentation.h" |
+#include "vp9/common/vp9_systemdependent.h" |
+ |
+#define ENERGY_MIN (-1) |
+#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 double q_ratio[MAX_SEGMENTS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; |
+static double rdmult_ratio[MAX_SEGMENTS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; |
+static int segment_id[MAX_SEGMENTS] = { 5, 3, 1, 0, 2, 4, 6, 7 }; |
+ |
+#define Q_RATIO(i) q_ratio[(i) - ENERGY_MIN] |
+#define RDMULT_RATIO(i) rdmult_ratio[(i) - ENERGY_MIN] |
+#define SEGMENT_ID(i) segment_id[(i) - ENERGY_MIN] |
+ |
+DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = {0}; |
+ |
+unsigned int vp9_vaq_segment_id(int energy) { |
+ ENERGY_IN_BOUNDS(energy); |
+ |
+ return SEGMENT_ID(energy); |
+} |
+ |
+double vp9_vaq_rdmult_ratio(int energy) { |
+ ENERGY_IN_BOUNDS(energy); |
+ |
+ vp9_clear_system_state(); |
+ |
+ return RDMULT_RATIO(energy); |
+} |
+ |
+double vp9_vaq_inv_q_ratio(int energy) { |
+ ENERGY_IN_BOUNDS(energy); |
+ |
+ vp9_clear_system_state(); |
+ |
+ return Q_RATIO(-energy); |
+} |
+ |
+void vp9_vaq_init() { |
+ int i; |
+ double base_ratio; |
+ |
+ assert(ENERGY_SPAN <= MAX_SEGMENTS); |
+ |
+ vp9_clear_system_state(); |
+ |
+ base_ratio = 1.5; |
+ |
+ for (i = ENERGY_MIN; i <= ENERGY_MAX; i++) { |
+ Q_RATIO(i) = pow(base_ratio, i/3.0); |
+ } |
+} |
+ |
+void vp9_vaq_frame_setup(VP9_COMP *cpi) { |
+ VP9_COMMON *cm = &cpi->common; |
+ struct segmentation *seg = &cm->seg; |
+ const double base_q = vp9_convert_qindex_to_q(cm->base_qindex); |
+ const int base_rdmult = vp9_compute_rd_mult(cpi, cm->base_qindex + |
+ cm->y_dc_delta_q); |
+ 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 = ENERGY_MIN; i <= ENERGY_MAX; i++) { |
+ int qindex_delta, segment_rdmult; |
+ |
+ if (Q_RATIO(i) == 1) { |
+ // No need to enable SEG_LVL_ALT_Q for this segment |
+ RDMULT_RATIO(i) = 1; |
+ continue; |
+ } |
+ |
+ qindex_delta = vp9_compute_qdelta(&cpi->rc, base_q, base_q * Q_RATIO(i)); |
+ vp9_set_segdata(seg, SEGMENT_ID(i), SEG_LVL_ALT_Q, qindex_delta); |
+ vp9_enable_segfeature(seg, SEGMENT_ID(i), SEG_LVL_ALT_Q); |
+ |
+ segment_rdmult = vp9_compute_rd_mult(cpi, cm->base_qindex + qindex_delta + |
+ cm->y_dc_delta_q); |
+ |
+ RDMULT_RATIO(i) = (double) segment_rdmult / base_rdmult; |
+ } |
+ } |
+} |
+ |
+ |
+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; |
+ variance(x->plane[0].src.buf, x->plane[0].src.stride, |
+ vp9_64_zeros, 0, bw, bh, &sse, &avg); |
+ var = sse - (((int64_t)avg * avg) / (bw * bh)); |
+ return (256 * var) / (bw * bh); |
+ } else { |
+ var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, |
+ x->plane[0].src.stride, |
+ vp9_64_zeros, 0, &sse); |
+ return (256 * var) >> num_pels_log2_lookup[bs]; |
+ } |
+} |
+ |
+int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) { |
+ double energy; |
+ unsigned int var = block_variance(cpi, x, bs); |
+ |
+ vp9_clear_system_state(); |
+ |
+ energy = 0.9 * (log(var + 1.0) - 10.0); |
+ return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX); |
+} |