diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/encoder/vp9_quantize.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/media/libvpx/vp9/encoder/vp9_quantize.c Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,348 @@ +/* + * Copyright (c) 2010 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 +#include "vpx_mem/vpx_mem.h" + +#include "vp9/encoder/vp9_onyx_int.h" +#include "vp9/encoder/vp9_rdopt.h" +#include "vp9/encoder/vp9_quantize.h" +#include "vp9/common/vp9_quant_common.h" + +#include "vp9/common/vp9_seg_common.h" + +#ifdef ENC_DEBUG +extern int enc_debug; +#endif + +void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t count, + int skip_block, + const int16_t *zbin_ptr, const int16_t *round_ptr, + const int16_t *quant_ptr, const int16_t *quant_shift_ptr, + int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr, + const int16_t *dequant_ptr, + int zbin_oq_value, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + int i, non_zero_count = count, eob = -1; + const int zbins[2] = { zbin_ptr[0] + zbin_oq_value, + zbin_ptr[1] + zbin_oq_value }; + const int nzbins[2] = { zbins[0] * -1, + zbins[1] * -1 }; + + vpx_memset(qcoeff_ptr, 0, count * sizeof(int16_t)); + vpx_memset(dqcoeff_ptr, 0, count * sizeof(int16_t)); + + if (!skip_block) { + // Pre-scan pass + for (i = count - 1; i >= 0; i--) { + const int rc = scan[i]; + const int coeff = coeff_ptr[rc]; + + if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0]) + non_zero_count--; + else + break; + } + + // Quantization pass: All coefficients with index >= zero_flag are + // skippable. Note: zero_flag can be zero. + for (i = 0; i < non_zero_count; i++) { + const int rc = scan[i]; + const int coeff = coeff_ptr[rc]; + const int coeff_sign = (coeff >> 31); + const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; + + if (abs_coeff >= zbins[rc != 0]) { + int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX); + tmp = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) * + quant_shift_ptr[rc != 0]) >> 16; // quantization + qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign; + dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0]; + + if (tmp) + eob = i; + } + } + } + *eob_ptr = eob + 1; +} + +void vp9_quantize_b_32x32_c(const int16_t *coeff_ptr, intptr_t n_coeffs, + int skip_block, + const int16_t *zbin_ptr, const int16_t *round_ptr, + const int16_t *quant_ptr, + const int16_t *quant_shift_ptr, + int16_t *qcoeff_ptr, int16_t *dqcoeff_ptr, + const int16_t *dequant_ptr, + int zbin_oq_value, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + int i, rc, eob; + int zbins[2], nzbins[2]; + int x, y, z, sz; + int idx = 0; + int idx_arr[1024]; + + vpx_memset(qcoeff_ptr, 0, n_coeffs*sizeof(int16_t)); + vpx_memset(dqcoeff_ptr, 0, n_coeffs*sizeof(int16_t)); + + eob = -1; + + // Base ZBIN + zbins[0] = ROUND_POWER_OF_TWO(zbin_ptr[0] + zbin_oq_value, 1); + zbins[1] = ROUND_POWER_OF_TWO(zbin_ptr[1] + zbin_oq_value, 1); + nzbins[0] = zbins[0] * -1; + nzbins[1] = zbins[1] * -1; + + if (!skip_block) { + // Pre-scan pass + for (i = 0; i < n_coeffs; i++) { + rc = scan[i]; + z = coeff_ptr[rc]; + + // If the coefficient is out of the base ZBIN range, keep it for + // quantization. + if (z >= zbins[rc != 0] || z <= nzbins[rc != 0]) + idx_arr[idx++] = i; + } + + // Quantization pass: only process the coefficients selected in + // pre-scan pass. Note: idx can be zero. + for (i = 0; i < idx; i++) { + rc = scan[idx_arr[i]]; + + z = coeff_ptr[rc]; + sz = (z >> 31); // sign of z + x = (z ^ sz) - sz; // x = abs(z) + + x += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1); + x = clamp(x, INT16_MIN, INT16_MAX); + y = ((((x * quant_ptr[rc != 0]) >> 16) + x) * + quant_shift_ptr[rc != 0]) >> 15; // quantize (x) + + x = (y ^ sz) - sz; // get the sign back + qcoeff_ptr[rc] = x; // write to destination + dqcoeff_ptr[rc] = x * dequant_ptr[rc != 0] / 2; // dequantized value + + if (y) + eob = idx_arr[i]; // last nonzero coeffs + } + } + *eob_ptr = eob + 1; +} + +struct plane_block_idx { + int plane; + int block; +}; + +// TODO(jkoleszar): returning a struct so it can be used in a const context, +// expect to refactor this further later. +static INLINE struct plane_block_idx plane_block_idx(int y_blocks, + int b_idx) { + const int v_offset = y_blocks * 5 / 4; + struct plane_block_idx res; + + if (b_idx < y_blocks) { + res.plane = 0; + res.block = b_idx; + } else if (b_idx < v_offset) { + res.plane = 1; + res.block = b_idx - y_blocks; + } else { + assert(b_idx < y_blocks * 3 / 2); + res.plane = 2; + res.block = b_idx - v_offset; + } + return res; +} + +void vp9_regular_quantize_b_4x4(MACROBLOCK *x, int y_blocks, int b_idx, + const int16_t *scan, const int16_t *iscan) { + MACROBLOCKD *const xd = &x->e_mbd; + const struct plane_block_idx pb_idx = plane_block_idx(y_blocks, b_idx); + struct macroblock_plane* p = &x->plane[pb_idx.plane]; + struct macroblockd_plane* pd = &xd->plane[pb_idx.plane]; + + vp9_quantize_b(BLOCK_OFFSET(p->coeff, pb_idx.block), + 16, x->skip_block, + p->zbin, p->round, p->quant, p->quant_shift, + BLOCK_OFFSET(pd->qcoeff, pb_idx.block), + BLOCK_OFFSET(pd->dqcoeff, pb_idx.block), + pd->dequant, p->zbin_extra, &pd->eobs[pb_idx.block], scan, iscan); +} + +static void invert_quant(int16_t *quant, int16_t *shift, int d) { + unsigned t; + int l; + t = d; + for (l = 0; t > 1; l++) + t >>= 1; + t = 1 + (1 << (16 + l)) / d; + *quant = (int16_t)(t - (1 << 16)); + *shift = 1 << (16 - l); +} + +void vp9_init_quantizer(VP9_COMP *cpi) { + int i, q; + VP9_COMMON *const cm = &cpi->common; + + for (q = 0; q < QINDEX_RANGE; q++) { + const int qzbin_factor = q == 0 ? 64 : (vp9_dc_quant(q, 0) < 148 ? 84 : 80); + const int qrounding_factor = q == 0 ? 64 : 48; + + // y + for (i = 0; i < 2; ++i) { + const int quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q) + : vp9_ac_quant(q, 0); + invert_quant(&cpi->y_quant[q][i], &cpi->y_quant_shift[q][i], quant); + cpi->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7); + cpi->y_round[q][i] = (qrounding_factor * quant) >> 7; + cm->y_dequant[q][i] = quant; + } + + // uv + for (i = 0; i < 2; ++i) { + const int quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q) + : vp9_ac_quant(q, cm->uv_ac_delta_q); + invert_quant(&cpi->uv_quant[q][i], &cpi->uv_quant_shift[q][i], quant); + cpi->uv_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7); + cpi->uv_round[q][i] = (qrounding_factor * quant) >> 7; + cm->uv_dequant[q][i] = quant; + } + +#if CONFIG_ALPHA + // alpha + for (i = 0; i < 2; ++i) { + const int quant = i == 0 ? vp9_dc_quant(q, cm->a_dc_delta_q) + : vp9_ac_quant(q, cm->a_ac_delta_q); + invert_quant(&cpi->a_quant[q][i], &cpi->a_quant_shift[q][i], quant); + cpi->a_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7); + cpi->a_round[q][i] = (qrounding_factor * quant) >> 7; + cm->a_dequant[q][i] = quant; + } +#endif + + for (i = 2; i < 8; i++) { + cpi->y_quant[q][i] = cpi->y_quant[q][1]; + cpi->y_quant_shift[q][i] = cpi->y_quant_shift[q][1]; + cpi->y_zbin[q][i] = cpi->y_zbin[q][1]; + cpi->y_round[q][i] = cpi->y_round[q][1]; + cm->y_dequant[q][i] = cm->y_dequant[q][1]; + + cpi->uv_quant[q][i] = cpi->uv_quant[q][1]; + cpi->uv_quant_shift[q][i] = cpi->uv_quant_shift[q][1]; + cpi->uv_zbin[q][i] = cpi->uv_zbin[q][1]; + cpi->uv_round[q][i] = cpi->uv_round[q][1]; + cm->uv_dequant[q][i] = cm->uv_dequant[q][1]; + +#if CONFIG_ALPHA + cpi->a_quant[q][i] = cpi->a_quant[q][1]; + cpi->a_quant_shift[q][i] = cpi->a_quant_shift[q][1]; + cpi->a_zbin[q][i] = cpi->a_zbin[q][1]; + cpi->a_round[q][i] = cpi->a_round[q][1]; + cm->a_dequant[q][i] = cm->a_dequant[q][1]; +#endif + } + } +} + +void vp9_mb_init_quantizer(VP9_COMP *cpi, MACROBLOCK *x) { + int i; + VP9_COMMON *const cm = &cpi->common; + MACROBLOCKD *xd = &x->e_mbd; + int zbin_extra; + int segment_id = xd->mi_8x8[0]->mbmi.segment_id; + const int qindex = vp9_get_qindex(&cpi->common.seg, segment_id, + cpi->common.base_qindex); + + int rdmult = vp9_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q); + + // Y + zbin_extra = (cpi->common.y_dequant[qindex][1] * + (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7; + + x->plane[0].quant = cpi->y_quant[qindex]; + x->plane[0].quant_shift = cpi->y_quant_shift[qindex]; + x->plane[0].zbin = cpi->y_zbin[qindex]; + x->plane[0].round = cpi->y_round[qindex]; + x->plane[0].zbin_extra = (int16_t)zbin_extra; + x->e_mbd.plane[0].dequant = cpi->common.y_dequant[qindex]; + + // UV + zbin_extra = (cpi->common.uv_dequant[qindex][1] * + (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7; + + for (i = 1; i < 3; i++) { + x->plane[i].quant = cpi->uv_quant[qindex]; + x->plane[i].quant_shift = cpi->uv_quant_shift[qindex]; + x->plane[i].zbin = cpi->uv_zbin[qindex]; + x->plane[i].round = cpi->uv_round[qindex]; + x->plane[i].zbin_extra = (int16_t)zbin_extra; + x->e_mbd.plane[i].dequant = cpi->common.uv_dequant[qindex]; + } + +#if CONFIG_ALPHA + x->plane[3].quant = cpi->a_quant[qindex]; + x->plane[3].quant_shift = cpi->a_quant_shift[qindex]; + x->plane[3].zbin = cpi->a_zbin[qindex]; + x->plane[3].round = cpi->a_round[qindex]; + x->plane[3].zbin_extra = (int16_t)zbin_extra; + x->e_mbd.plane[3].dequant = cpi->common.a_dequant[qindex]; +#endif + + x->skip_block = vp9_segfeature_active(&cpi->common.seg, segment_id, + SEG_LVL_SKIP); + + /* save this macroblock QIndex for vp9_update_zbin_extra() */ + x->q_index = qindex; + + /* R/D setup */ + cpi->mb.errorperbit = rdmult >> 6; + cpi->mb.errorperbit += (cpi->mb.errorperbit == 0); + + vp9_initialize_me_consts(cpi, x->q_index); +} + +void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) { + const int qindex = x->q_index; + const int y_zbin_extra = (cpi->common.y_dequant[qindex][1] * + (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7; + const int uv_zbin_extra = (cpi->common.uv_dequant[qindex][1] * + (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7; + + x->plane[0].zbin_extra = (int16_t)y_zbin_extra; + x->plane[1].zbin_extra = (int16_t)uv_zbin_extra; + x->plane[2].zbin_extra = (int16_t)uv_zbin_extra; +} + +void vp9_frame_init_quantizer(VP9_COMP *cpi) { + // Clear Zbin mode boost for default case + cpi->zbin_mode_boost = 0; + + // MB level quantizer setup + vp9_mb_init_quantizer(cpi, &cpi->mb); +} + +void vp9_set_quantizer(struct VP9_COMP *cpi, int q) { + VP9_COMMON *cm = &cpi->common; + + cm->base_qindex = q; + + // if any of the delta_q values are changing update flag will + // have to be set. + cm->y_dc_delta_q = 0; + cm->uv_dc_delta_q = 0; + cm->uv_ac_delta_q = 0; + + // quantizer has to be reinitialized if any delta_q changes. + // As there are not any here for now this is inactive code. + // if(update) + // vp9_init_quantizer(cpi); +}