363 lines
12 KiB
C
363 lines
12 KiB
C
/*
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* Copyright (c) 2010 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 "vpx_mem/vpx_mem.h"
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#include "vp9/encoder/vp9_onyx_int.h"
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#include "vp9/encoder/vp9_rdopt.h"
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#include "vp9/encoder/vp9_quantize.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_seg_common.h"
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#ifdef ENC_DEBUG
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extern int enc_debug;
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#endif
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void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr, const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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int i, rc, eob;
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int zbins[2], nzbins[2], zbin;
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int x, y, z, sz;
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int zero_flag = n_coeffs;
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vpx_memset(qcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
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eob = -1;
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// Base ZBIN
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zbins[0] = zbin_ptr[0] + zbin_oq_value;
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zbins[1] = zbin_ptr[1] + zbin_oq_value;
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nzbins[0] = zbins[0] * -1;
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nzbins[1] = zbins[1] * -1;
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if (!skip_block) {
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// Pre-scan pass
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for (i = n_coeffs - 1; i >= 0; i--) {
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rc = scan[i];
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z = coeff_ptr[rc];
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if (z < zbins[rc != 0] && z > nzbins[rc != 0]) {
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zero_flag--;
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} else {
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break;
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}
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}
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// Quantization pass: All coefficients with index >= zero_flag are
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// skippable. Note: zero_flag can be zero.
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for (i = 0; i < zero_flag; i++) {
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rc = scan[i];
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z = coeff_ptr[rc];
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zbin = (zbins[rc != 0]);
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sz = (z >> 31); // sign of z
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x = (z ^ sz) - sz;
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if (x >= zbin) {
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x += (round_ptr[rc != 0]);
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x = clamp(x, INT16_MIN, INT16_MAX);
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y = (((int)(((int)(x * quant_ptr[rc != 0]) >> 16) + x)) *
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quant_shift_ptr[rc != 0]) >> 16; // quantize (x)
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x = (y ^ sz) - sz; // get the sign back
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qcoeff_ptr[rc] = x; // write to destination
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dqcoeff_ptr[rc] = x * dequant_ptr[rc != 0]; // dequantized value
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if (y) {
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eob = i; // last nonzero coeffs
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}
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}
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}
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}
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*eob_ptr = eob + 1;
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}
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void vp9_quantize_b_32x32_c(const int16_t *coeff_ptr, intptr_t n_coeffs,
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int skip_block,
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const int16_t *zbin_ptr, const int16_t *round_ptr,
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const int16_t *quant_ptr,
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const int16_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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const int16_t *dequant_ptr,
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int zbin_oq_value, uint16_t *eob_ptr,
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const int16_t *scan, const int16_t *iscan) {
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int i, rc, eob;
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int zbins[2], nzbins[2];
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int x, y, z, sz;
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int idx = 0;
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int idx_arr[1024];
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vpx_memset(qcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
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vpx_memset(dqcoeff_ptr, 0, n_coeffs*sizeof(int16_t));
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eob = -1;
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// Base ZBIN
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zbins[0] = ROUND_POWER_OF_TWO(zbin_ptr[0] + zbin_oq_value, 1);
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zbins[1] = ROUND_POWER_OF_TWO(zbin_ptr[1] + zbin_oq_value, 1);
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nzbins[0] = zbins[0] * -1;
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nzbins[1] = zbins[1] * -1;
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if (!skip_block) {
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// Pre-scan pass
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for (i = 0; i < n_coeffs; i++) {
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rc = scan[i];
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z = coeff_ptr[rc];
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// If the coefficient is out of the base ZBIN range, keep it for
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// quantization.
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if (z >= zbins[rc != 0] || z <= nzbins[rc != 0])
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idx_arr[idx++] = i;
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}
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// Quantization pass: only process the coefficients selected in
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// pre-scan pass. Note: idx can be zero.
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for (i = 0; i < idx; i++) {
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rc = scan[idx_arr[i]];
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z = coeff_ptr[rc];
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sz = (z >> 31); // sign of z
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x = (z ^ sz) - sz; // x = abs(z)
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x += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
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x = clamp(x, INT16_MIN, INT16_MAX);
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y = ((((x * quant_ptr[rc != 0]) >> 16) + x) *
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quant_shift_ptr[rc != 0]) >> 15; // quantize (x)
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x = (y ^ sz) - sz; // get the sign back
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qcoeff_ptr[rc] = x; // write to destination
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dqcoeff_ptr[rc] = x * dequant_ptr[rc != 0] / 2; // dequantized value
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if (y)
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eob = idx_arr[i]; // last nonzero coeffs
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}
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}
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*eob_ptr = eob + 1;
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}
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struct plane_block_idx {
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int plane;
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int block;
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};
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// TODO(jkoleszar): returning a struct so it can be used in a const context,
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// expect to refactor this further later.
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static INLINE struct plane_block_idx plane_block_idx(int y_blocks,
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int b_idx) {
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const int v_offset = y_blocks * 5 / 4;
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struct plane_block_idx res;
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if (b_idx < y_blocks) {
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res.plane = 0;
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res.block = b_idx;
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} else if (b_idx < v_offset) {
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res.plane = 1;
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res.block = b_idx - y_blocks;
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} else {
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assert(b_idx < y_blocks * 3 / 2);
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res.plane = 2;
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res.block = b_idx - v_offset;
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}
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return res;
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}
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void vp9_regular_quantize_b_4x4(MACROBLOCK *x, int y_blocks, int b_idx,
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const int16_t *scan, const int16_t *iscan) {
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MACROBLOCKD *const xd = &x->e_mbd;
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const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
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struct macroblock_plane* p = &x->plane[pb_idx.plane];
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struct macroblockd_plane* pd = &xd->plane[pb_idx.plane];
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vp9_quantize_b(BLOCK_OFFSET(p->coeff, pb_idx.block),
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16, x->skip_block,
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p->zbin, p->round, p->quant, p->quant_shift,
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BLOCK_OFFSET(pd->qcoeff, pb_idx.block),
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BLOCK_OFFSET(pd->dqcoeff, pb_idx.block),
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pd->dequant, p->zbin_extra, &pd->eobs[pb_idx.block], scan, iscan);
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}
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static void invert_quant(int16_t *quant, int16_t *shift, int d) {
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unsigned t;
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int l;
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t = d;
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for (l = 0; t > 1; l++)
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t >>= 1;
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t = 1 + (1 << (16 + l)) / d;
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*quant = (int16_t)(t - (1 << 16));
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*shift = 1 << (16 - l);
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}
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void vp9_init_quantizer(VP9_COMP *cpi) {
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int i, q;
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VP9_COMMON *const cm = &cpi->common;
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for (q = 0; q < QINDEX_RANGE; q++) {
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const int qzbin_factor = q == 0 ? 64 : (vp9_dc_quant(q, 0) < 148 ? 84 : 80);
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const int qrounding_factor = q == 0 ? 64 : 48;
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// y
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for (i = 0; i < 2; ++i) {
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const int quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q)
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: vp9_ac_quant(q, 0);
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invert_quant(&cpi->y_quant[q][i], &cpi->y_quant_shift[q][i], quant);
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cpi->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
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cpi->y_round[q][i] = (qrounding_factor * quant) >> 7;
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cm->y_dequant[q][i] = quant;
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}
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// uv
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for (i = 0; i < 2; ++i) {
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const int quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q)
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: vp9_ac_quant(q, cm->uv_ac_delta_q);
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invert_quant(&cpi->uv_quant[q][i], &cpi->uv_quant_shift[q][i], quant);
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cpi->uv_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
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cpi->uv_round[q][i] = (qrounding_factor * quant) >> 7;
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cm->uv_dequant[q][i] = quant;
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}
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#if CONFIG_ALPHA
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// alpha
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for (i = 0; i < 2; ++i) {
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const int quant = i == 0 ? vp9_dc_quant(q, cm->a_dc_delta_q)
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: vp9_ac_quant(q, cm->a_ac_delta_q);
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invert_quant(&cpi->a_quant[q][i], &cpi->a_quant_shift[q][i], quant);
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cpi->a_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
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cpi->a_round[q][i] = (qrounding_factor * quant) >> 7;
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cm->a_dequant[q][i] = quant;
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}
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#endif
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for (i = 2; i < 8; i++) {
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cpi->y_quant[q][i] = cpi->y_quant[q][1];
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cpi->y_quant_shift[q][i] = cpi->y_quant_shift[q][1];
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cpi->y_zbin[q][i] = cpi->y_zbin[q][1];
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cpi->y_round[q][i] = cpi->y_round[q][1];
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cm->y_dequant[q][i] = cm->y_dequant[q][1];
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cpi->uv_quant[q][i] = cpi->uv_quant[q][1];
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cpi->uv_quant_shift[q][i] = cpi->uv_quant_shift[q][1];
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cpi->uv_zbin[q][i] = cpi->uv_zbin[q][1];
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cpi->uv_round[q][i] = cpi->uv_round[q][1];
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cm->uv_dequant[q][i] = cm->uv_dequant[q][1];
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#if CONFIG_ALPHA
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cpi->a_quant[q][i] = cpi->a_quant[q][1];
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cpi->a_quant_shift[q][i] = cpi->a_quant_shift[q][1];
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cpi->a_zbin[q][i] = cpi->a_zbin[q][1];
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cpi->a_round[q][i] = cpi->a_round[q][1];
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cm->a_dequant[q][i] = cm->a_dequant[q][1];
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#endif
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}
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}
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}
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void vp9_mb_init_quantizer(VP9_COMP *cpi, MACROBLOCK *x) {
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int i;
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VP9_COMMON *const cm = &cpi->common;
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MACROBLOCKD *xd = &x->e_mbd;
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int zbin_extra;
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int segment_id = xd->mi_8x8[0]->mbmi.segment_id;
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const int qindex = vp9_get_qindex(&cpi->common.seg, segment_id,
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cpi->common.base_qindex);
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int rdmult = vp9_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q);
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// Y
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zbin_extra = (cpi->common.y_dequant[qindex][1] *
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(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
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x->plane[0].quant = cpi->y_quant[qindex];
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x->plane[0].quant_shift = cpi->y_quant_shift[qindex];
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x->plane[0].zbin = cpi->y_zbin[qindex];
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x->plane[0].round = cpi->y_round[qindex];
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x->plane[0].zbin_extra = (int16_t)zbin_extra;
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x->e_mbd.plane[0].dequant = cpi->common.y_dequant[qindex];
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// UV
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zbin_extra = (cpi->common.uv_dequant[qindex][1] *
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(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
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for (i = 1; i < 3; i++) {
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x->plane[i].quant = cpi->uv_quant[qindex];
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x->plane[i].quant_shift = cpi->uv_quant_shift[qindex];
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x->plane[i].zbin = cpi->uv_zbin[qindex];
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x->plane[i].round = cpi->uv_round[qindex];
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x->plane[i].zbin_extra = (int16_t)zbin_extra;
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x->e_mbd.plane[i].dequant = cpi->common.uv_dequant[qindex];
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}
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#if CONFIG_ALPHA
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x->plane[3].quant = cpi->a_quant[qindex];
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x->plane[3].quant_shift = cpi->a_quant_shift[qindex];
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x->plane[3].zbin = cpi->a_zbin[qindex];
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x->plane[3].round = cpi->a_round[qindex];
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x->plane[3].zbin_extra = (int16_t)zbin_extra;
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x->e_mbd.plane[3].dequant = cpi->common.a_dequant[qindex];
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#endif
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x->skip_block = vp9_segfeature_active(&cpi->common.seg, segment_id,
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SEG_LVL_SKIP);
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/* save this macroblock QIndex for vp9_update_zbin_extra() */
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x->e_mbd.q_index = qindex;
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/* R/D setup */
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cpi->mb.errorperbit = rdmult >> 6;
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cpi->mb.errorperbit += (cpi->mb.errorperbit == 0);
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vp9_initialize_me_consts(cpi, xd->q_index);
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}
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void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) {
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const int qindex = x->e_mbd.q_index;
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const int y_zbin_extra = (cpi->common.y_dequant[qindex][1] *
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(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
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const int uv_zbin_extra = (cpi->common.uv_dequant[qindex][1] *
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(cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7;
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x->plane[0].zbin_extra = (int16_t)y_zbin_extra;
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x->plane[1].zbin_extra = (int16_t)uv_zbin_extra;
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x->plane[2].zbin_extra = (int16_t)uv_zbin_extra;
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}
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void vp9_frame_init_quantizer(VP9_COMP *cpi) {
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// Clear Zbin mode boost for default case
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cpi->zbin_mode_boost = 0;
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// MB level quantizer setup
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vp9_mb_init_quantizer(cpi, &cpi->mb);
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}
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void vp9_set_quantizer(struct VP9_COMP *cpi, int q) {
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VP9_COMMON *cm = &cpi->common;
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cm->base_qindex = q;
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// if any of the delta_q values are changing update flag will
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// have to be set.
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cm->y_dc_delta_q = 0;
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cm->uv_dc_delta_q = 0;
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cm->uv_ac_delta_q = 0;
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// quantizer has to be reinitialized if any delta_q changes.
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// As there are not any here for now this is inactive code.
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// if(update)
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// vp9_init_quantizer(cpi);
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}
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