278 lines
9.3 KiB
C
278 lines
9.3 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_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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static INLINE int plane_idx(int plane) {
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return plane == 0 ? 0 :
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plane == 1 ? 16 : 20;
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}
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static void quantize(int16_t *zbin_boost_orig_ptr,
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int16_t *coeff_ptr, int n_coeffs, int skip_block,
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int16_t *zbin_ptr, int16_t *round_ptr, int16_t *quant_ptr,
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uint8_t *quant_shift_ptr,
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int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr,
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int16_t *dequant_ptr, int zbin_oq_value,
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uint16_t *eob_ptr,
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const int *scan, int mul) {
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int i, rc, eob;
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int zbin;
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int x, y, z, sz;
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int zero_run = 0;
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int16_t *zbin_boost_ptr = zbin_boost_orig_ptr;
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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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if (!skip_block) {
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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] * mul;
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zbin = (zbin_ptr[rc != 0] + zbin_boost_ptr[zero_run] + zbin_oq_value);
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zero_run += (zero_run < 15);
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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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if (x >= zbin) {
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x += (round_ptr[rc != 0]);
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y = ((int)(((int)(x * quant_ptr[rc != 0]) >> 16) + x))
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>> quant_shift_ptr[rc != 0]; // 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] / mul; // dequantized value
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if (y) {
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eob = i; // last nonzero coeffs
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zero_run = 0;
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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(MACROBLOCK *mb, int plane, int block, int n_coeffs,
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TX_TYPE tx_type) {
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MACROBLOCKD *const xd = &mb->e_mbd;
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const int mul = n_coeffs == 1024 ? 2 : 1;
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const int *scan;
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// These contexts may be available in the caller
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switch (n_coeffs) {
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case 4 * 4:
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scan = get_scan_4x4(tx_type);
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break;
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case 8 * 8:
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scan = get_scan_8x8(tx_type);
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break;
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case 16 * 16:
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scan = get_scan_16x16(tx_type);
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break;
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default:
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scan = vp9_default_zig_zag1d_32x32;
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break;
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}
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quantize(mb->plane[plane].zrun_zbin_boost,
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BLOCK_OFFSET(mb->plane[plane].coeff, block, 16),
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n_coeffs, mb->skip_block,
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mb->plane[plane].zbin,
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mb->plane[plane].round,
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mb->plane[plane].quant,
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mb->plane[plane].quant_shift,
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BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16),
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BLOCK_OFFSET(xd->plane[plane].dqcoeff, block, 16),
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xd->plane[plane].dequant,
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mb->plane[plane].zbin_extra,
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&xd->plane[plane].eobs[block],
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scan, mul);
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}
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void vp9_regular_quantize_b_4x4(MACROBLOCK *mb, int b_idx, TX_TYPE tx_type,
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int y_blocks) {
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MACROBLOCKD *const xd = &mb->e_mbd;
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const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx);
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const int *pt_scan = get_scan_4x4(tx_type);
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quantize(mb->plane[pb_idx.plane].zrun_zbin_boost,
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BLOCK_OFFSET(mb->plane[pb_idx.plane].coeff, pb_idx.block, 16),
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16, mb->skip_block,
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mb->plane[pb_idx.plane].zbin,
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mb->plane[pb_idx.plane].round,
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mb->plane[pb_idx.plane].quant,
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mb->plane[pb_idx.plane].quant_shift,
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BLOCK_OFFSET(xd->plane[pb_idx.plane].qcoeff, pb_idx.block, 16),
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BLOCK_OFFSET(xd->plane[pb_idx.plane].dqcoeff, pb_idx.block, 16),
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xd->plane[pb_idx.plane].dequant,
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mb->plane[pb_idx.plane].zbin_extra,
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&xd->plane[pb_idx.plane].eobs[pb_idx.block],
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pt_scan, 1);
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}
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static void invert_quant(int16_t *quant, uint8_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 = l;
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}
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void vp9_init_quantizer(VP9_COMP *cpi) {
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int i;
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int quant_val;
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int quant_uv_val;
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int q;
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static const int zbin_boost[16] = { 0, 0, 0, 8, 8, 8, 10, 12,
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14, 16, 20, 24, 28, 32, 36, 40 };
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for (q = 0; q < QINDEX_RANGE; q++) {
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int qzbin_factor = (vp9_dc_quant(q, 0) < 148) ? 84 : 80;
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int qrounding_factor = 48;
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if (q == 0) {
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qzbin_factor = 64;
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qrounding_factor = 64;
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}
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// dc values
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quant_val = vp9_dc_quant(q, cpi->common.y_dc_delta_q);
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invert_quant(cpi->y_quant[q] + 0, cpi->y_quant_shift[q] + 0, quant_val);
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cpi->y_zbin[q][0] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
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cpi->y_round[q][0] = (qrounding_factor * quant_val) >> 7;
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cpi->common.y_dequant[q][0] = quant_val;
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cpi->zrun_zbin_boost_y[q][0] = (quant_val * zbin_boost[0]) >> 7;
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quant_val = vp9_dc_quant(q, cpi->common.uv_dc_delta_q);
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invert_quant(cpi->uv_quant[q] + 0, cpi->uv_quant_shift[q] + 0, quant_val);
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cpi->uv_zbin[q][0] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
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cpi->uv_round[q][0] = (qrounding_factor * quant_val) >> 7;
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cpi->common.uv_dequant[q][0] = quant_val;
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cpi->zrun_zbin_boost_uv[q][0] = (quant_val * zbin_boost[0]) >> 7;
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quant_val = vp9_ac_quant(q, 0);
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cpi->common.y_dequant[q][1] = quant_val;
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quant_uv_val = vp9_ac_quant(q, cpi->common.uv_ac_delta_q);
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cpi->common.uv_dequant[q][1] = quant_uv_val;
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// all the 4x4 ac values =;
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for (i = 1; i < 16; i++) {
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int rc = vp9_default_zig_zag1d_4x4[i];
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invert_quant(cpi->y_quant[q] + rc, cpi->y_quant_shift[q] + rc, quant_val);
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cpi->y_zbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_val, 7);
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cpi->y_round[q][rc] = (qrounding_factor * quant_val) >> 7;
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cpi->zrun_zbin_boost_y[q][i] =
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ROUND_POWER_OF_TWO(quant_val * zbin_boost[i], 7);
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invert_quant(cpi->uv_quant[q] + rc, cpi->uv_quant_shift[q] + rc,
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quant_uv_val);
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cpi->uv_zbin[q][rc] = ROUND_POWER_OF_TWO(qzbin_factor * quant_uv_val, 7);
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cpi->uv_round[q][rc] = (qrounding_factor * quant_uv_val) >> 7;
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cpi->zrun_zbin_boost_uv[q][i] =
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ROUND_POWER_OF_TWO(quant_uv_val * zbin_boost[i], 7);
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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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MACROBLOCKD *xd = &x->e_mbd;
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int zbin_extra;
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int segment_id = xd->mode_info_context->mbmi.segment_id;
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const int qindex = vp9_get_qindex(xd, segment_id, cpi->common.base_qindex);
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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].zrun_zbin_boost = cpi->zrun_zbin_boost_y[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].zrun_zbin_boost = cpi->zrun_zbin_boost_uv[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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x->skip_block = vp9_segfeature_active(xd, segment_id, 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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}
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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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