| /* |
| * 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_vaq.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 (-3) |
| #define ENERGY_MAX (3) |
| #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(); // __asm emms; |
| |
| return RDMULT_RATIO(energy); |
| } |
| |
| double vp9_vaq_inv_q_ratio(int energy) { |
| ENERGY_IN_BOUNDS(energy); |
| |
| vp9_clear_system_state(); // __asm emms; |
| |
| return Q_RATIO(-energy); |
| } |
| |
| void vp9_vaq_init() { |
| int i; |
| double base_ratio; |
| |
| assert(ENERGY_SPAN <= MAX_SEGMENTS); |
| |
| vp9_clear_system_state(); // __asm emms; |
| |
| base_ratio = 1.8; |
| |
| 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; |
| int base_q = vp9_convert_qindex_to_q(cm->base_qindex); |
| int base_rdmult = vp9_compute_rd_mult(cpi, cm->base_qindex + |
| cm->y_dc_delta_q); |
| int i; |
| |
| vp9_enable_segmentation((VP9_PTR)cpi); |
| vp9_clearall_segfeatures(seg); |
| |
| seg->abs_delta = SEGMENT_DELTADATA; |
| |
| vp9_clear_system_state(); // __asm emms; |
| |
| 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, 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(); // __asm emms; |
| |
| // if (var <= 1000) |
| // return 0; |
| |
| energy = 0.9*(logf(var + 1) - 10.0); |
| return clamp(round(energy), ENERGY_MIN, ENERGY_MAX); |
| } |