ff3aada6cb
Also avoid using floating-point operations when adaptive quantization is disabled. Change-Id: I54936d7afb661df049cdb3ecd246d04ac2a9d8d3
148 lines
4.2 KiB
C
148 lines
4.2 KiB
C
/*
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* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include "vp9/encoder/vp9_vaq.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/encoder/vp9_ratectrl.h"
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#include "vp9/encoder/vp9_rdopt.h"
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#include "vp9/encoder/vp9_segmentation.h"
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#include "vp9/common/vp9_systemdependent.h"
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#define ENERGY_MIN (-3)
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#define ENERGY_MAX (3)
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#define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN + 1)
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#define ENERGY_IN_BOUNDS(energy)\
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assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
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static double q_ratio[MAX_SEGMENTS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
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static double rdmult_ratio[MAX_SEGMENTS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
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static int segment_id[MAX_SEGMENTS] = { 5, 3, 1, 0, 2, 4, 6, 7 };
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#define Q_RATIO(i) q_ratio[(i) - ENERGY_MIN]
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#define RDMULT_RATIO(i) rdmult_ratio[(i) - ENERGY_MIN]
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#define SEGMENT_ID(i) segment_id[(i) - ENERGY_MIN]
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DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = {0};
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unsigned int vp9_vaq_segment_id(int energy) {
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ENERGY_IN_BOUNDS(energy);
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return SEGMENT_ID(energy);
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}
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double vp9_vaq_rdmult_ratio(int energy) {
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ENERGY_IN_BOUNDS(energy);
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vp9_clear_system_state(); // __asm emms;
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return RDMULT_RATIO(energy);
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}
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double vp9_vaq_inv_q_ratio(int energy) {
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ENERGY_IN_BOUNDS(energy);
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vp9_clear_system_state(); // __asm emms;
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return Q_RATIO(-energy);
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}
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void vp9_vaq_init() {
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int i;
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double base_ratio;
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assert(ENERGY_SPAN <= MAX_SEGMENTS);
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vp9_clear_system_state(); // __asm emms;
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base_ratio = 1.8;
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for (i = ENERGY_MIN; i <= ENERGY_MAX; i++) {
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Q_RATIO(i) = pow(base_ratio, i/3.0);
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}
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}
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void vp9_vaq_frame_setup(VP9_COMP *cpi) {
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VP9_COMMON *cm = &cpi->common;
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struct segmentation *seg = &cm->seg;
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int base_q = vp9_convert_qindex_to_q(cm->base_qindex);
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int base_rdmult = vp9_compute_rd_mult(cpi, cm->base_qindex +
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cm->y_dc_delta_q);
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int i;
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vp9_enable_segmentation((VP9_PTR)cpi);
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vp9_clearall_segfeatures(seg);
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seg->abs_delta = SEGMENT_DELTADATA;
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vp9_clear_system_state(); // __asm emms;
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for (i = ENERGY_MIN; i <= ENERGY_MAX; i++) {
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int qindex_delta, segment_rdmult;
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if (Q_RATIO(i) == 1) {
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// No need to enable SEG_LVL_ALT_Q for this segment
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RDMULT_RATIO(i) = 1;
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continue;
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}
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qindex_delta = vp9_compute_qdelta(cpi, base_q, base_q * Q_RATIO(i));
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vp9_set_segdata(seg, SEGMENT_ID(i), SEG_LVL_ALT_Q, qindex_delta);
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vp9_enable_segfeature(seg, SEGMENT_ID(i), SEG_LVL_ALT_Q);
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segment_rdmult = vp9_compute_rd_mult(cpi, cm->base_qindex + qindex_delta +
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cm->y_dc_delta_q);
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RDMULT_RATIO(i) = (double) segment_rdmult / base_rdmult;
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}
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}
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static unsigned int block_variance(VP9_COMP *cpi, MACROBLOCK *x,
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BLOCK_SIZE bs) {
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MACROBLOCKD *xd = &x->e_mbd;
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unsigned int var, sse;
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int right_overflow = (xd->mb_to_right_edge < 0) ?
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((-xd->mb_to_right_edge) >> 3) : 0;
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int bottom_overflow = (xd->mb_to_bottom_edge < 0) ?
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((-xd->mb_to_bottom_edge) >> 3) : 0;
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if (right_overflow || bottom_overflow) {
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int bw = (1 << (mi_width_log2(bs) + 3)) - right_overflow;
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int bh = (1 << (mi_height_log2(bs) + 3)) - bottom_overflow;
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int avg;
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variance(x->plane[0].src.buf, x->plane[0].src.stride,
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vp9_64_zeros, 0, bw, bh, &sse, &avg);
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var = sse - (((int64_t)avg * avg) / (bw * bh));
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return (256 * var) / (bw * bh);
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} else {
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var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
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x->plane[0].src.stride,
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vp9_64_zeros, 0, &sse);
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return (256 * var) >> num_pels_log2_lookup[bs];
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}
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}
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int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
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double energy;
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unsigned int var = block_variance(cpi, x, bs);
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vp9_clear_system_state(); // __asm emms;
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// if (var <= 1000)
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// return 0;
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energy = 0.9*(logf(var + 1) - 10.0);
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return clamp(round(energy), ENERGY_MIN, ENERGY_MAX);
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}
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