| /* |
| * 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 <math.h> |
| #include "vpx_mem/vpx_mem.h" |
| |
| #include "onyx_int.h" |
| #include "vp8/encoder/quantize.h" |
| #include "vp8/common/quant_common.h" |
| |
| void vp8_fast_quantize_b_c(BLOCK *b, BLOCKD *d) |
| { |
| int i, rc, eob; |
| int x, y, z, sz; |
| short *coeff_ptr = b->coeff; |
| short *round_ptr = b->round; |
| short *quant_ptr = b->quant_fast; |
| short *qcoeff_ptr = d->qcoeff; |
| short *dqcoeff_ptr = d->dqcoeff; |
| short *dequant_ptr = d->dequant; |
| |
| eob = -1; |
| for (i = 0; i < 16; i++) |
| { |
| rc = vp8_default_zig_zag1d[i]; |
| z = coeff_ptr[rc]; |
| |
| sz = (z >> 31); /* sign of z */ |
| x = (z ^ sz) - sz; /* x = abs(z) */ |
| |
| y = ((x + round_ptr[rc]) * quant_ptr[rc]) >> 16; /* quantize (x) */ |
| x = (y ^ sz) - sz; /* get the sign back */ |
| qcoeff_ptr[rc] = x; /* write to destination */ |
| dqcoeff_ptr[rc] = x * dequant_ptr[rc]; /* dequantized value */ |
| |
| if (y) |
| { |
| eob = i; /* last nonzero coeffs */ |
| } |
| } |
| *d->eob = (char)(eob + 1); |
| } |
| |
| void vp8_regular_quantize_b_c(BLOCK *b, BLOCKD *d) |
| { |
| int i, rc, eob; |
| int zbin; |
| int x, y, z, sz; |
| short *zbin_boost_ptr = b->zrun_zbin_boost; |
| short *coeff_ptr = b->coeff; |
| short *zbin_ptr = b->zbin; |
| short *round_ptr = b->round; |
| short *quant_ptr = b->quant; |
| short *quant_shift_ptr = b->quant_shift; |
| short *qcoeff_ptr = d->qcoeff; |
| short *dqcoeff_ptr = d->dqcoeff; |
| short *dequant_ptr = d->dequant; |
| short zbin_oq_value = b->zbin_extra; |
| |
| memset(qcoeff_ptr, 0, 32); |
| memset(dqcoeff_ptr, 0, 32); |
| |
| eob = -1; |
| |
| for (i = 0; i < 16; i++) |
| { |
| rc = vp8_default_zig_zag1d[i]; |
| z = coeff_ptr[rc]; |
| |
| zbin = zbin_ptr[rc] + *zbin_boost_ptr + zbin_oq_value; |
| |
| zbin_boost_ptr ++; |
| sz = (z >> 31); /* sign of z */ |
| x = (z ^ sz) - sz; /* x = abs(z) */ |
| |
| if (x >= zbin) |
| { |
| x += round_ptr[rc]; |
| y = ((((x * quant_ptr[rc]) >> 16) + x) |
| * quant_shift_ptr[rc]) >> 16; /* quantize (x) */ |
| x = (y ^ sz) - sz; /* get the sign back */ |
| qcoeff_ptr[rc] = x; /* write to destination */ |
| dqcoeff_ptr[rc] = x * dequant_ptr[rc]; /* dequantized value */ |
| |
| if (y) |
| { |
| eob = i; /* last nonzero coeffs */ |
| zbin_boost_ptr = b->zrun_zbin_boost; /* reset zero runlength */ |
| } |
| } |
| } |
| |
| *d->eob = (char)(eob + 1); |
| } |
| |
| void vp8_quantize_mby(MACROBLOCK *x) |
| { |
| int i; |
| int has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED |
| && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV); |
| |
| for (i = 0; i < 16; i++) |
| x->quantize_b(&x->block[i], &x->e_mbd.block[i]); |
| |
| if(has_2nd_order) |
| x->quantize_b(&x->block[24], &x->e_mbd.block[24]); |
| } |
| |
| void vp8_quantize_mb(MACROBLOCK *x) |
| { |
| int i; |
| int has_2nd_order=(x->e_mbd.mode_info_context->mbmi.mode != B_PRED |
| && x->e_mbd.mode_info_context->mbmi.mode != SPLITMV); |
| |
| for (i = 0; i < 24+has_2nd_order; i++) |
| x->quantize_b(&x->block[i], &x->e_mbd.block[i]); |
| } |
| |
| |
| void vp8_quantize_mbuv(MACROBLOCK *x) |
| { |
| int i; |
| |
| for (i = 16; i < 24; i++) |
| x->quantize_b(&x->block[i], &x->e_mbd.block[i]); |
| } |
| |
| static const int qrounding_factors[129] = |
| { |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48 |
| }; |
| |
| |
| static const int qzbin_factors[129] = |
| { |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80 |
| }; |
| |
| |
| static const int qrounding_factors_y2[129] = |
| { |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, 48, |
| 48 |
| }; |
| |
| |
| static const int qzbin_factors_y2[129] = |
| { |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 84, 84, 84, 84, 84, 84, 84, 84, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80, 80, 80, 80, 80, 80, 80, 80, |
| 80 |
| }; |
| |
| |
| static void invert_quant(int improved_quant, short *quant, |
| short *shift, short d) |
| { |
| if(improved_quant) |
| { |
| unsigned t; |
| int l, m; |
| t = d; |
| for(l = 0; t > 1; l++) |
| t>>=1; |
| m = 1 + (1<<(16+l))/d; |
| *quant = (short)(m - (1<<16)); |
| *shift = l; |
| /* use multiplication and constant shift by 16 */ |
| *shift = 1 << (16 - *shift); |
| } |
| else |
| { |
| *quant = (1 << 16) / d; |
| *shift = 0; |
| /* use multiplication and constant shift by 16 */ |
| *shift = 1 << (16 - *shift); |
| } |
| } |
| |
| |
| void vp8cx_init_quantizer(VP8_COMP *cpi) |
| { |
| int i; |
| int quant_val; |
| int Q; |
| |
| int zbin_boost[16] = {0, 0, 8, 10, 12, 14, 16, 20, 24, 28, 32, 36, 40, 44, |
| 44, 44}; |
| |
| for (Q = 0; Q < QINDEX_RANGE; Q++) |
| { |
| /* dc values */ |
| quant_val = vp8_dc_quant(Q, cpi->common.y1dc_delta_q); |
| cpi->Y1quant_fast[Q][0] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->Y1quant[Q] + 0, |
| cpi->Y1quant_shift[Q] + 0, quant_val); |
| cpi->Y1zbin[Q][0] = ((qzbin_factors[Q] * quant_val) + 64) >> 7; |
| cpi->Y1round[Q][0] = (qrounding_factors[Q] * quant_val) >> 7; |
| cpi->common.Y1dequant[Q][0] = quant_val; |
| cpi->zrun_zbin_boost_y1[Q][0] = (quant_val * zbin_boost[0]) >> 7; |
| |
| quant_val = vp8_dc2quant(Q, cpi->common.y2dc_delta_q); |
| cpi->Y2quant_fast[Q][0] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->Y2quant[Q] + 0, |
| cpi->Y2quant_shift[Q] + 0, quant_val); |
| cpi->Y2zbin[Q][0] = ((qzbin_factors_y2[Q] * quant_val) + 64) >> 7; |
| cpi->Y2round[Q][0] = (qrounding_factors_y2[Q] * quant_val) >> 7; |
| cpi->common.Y2dequant[Q][0] = quant_val; |
| cpi->zrun_zbin_boost_y2[Q][0] = (quant_val * zbin_boost[0]) >> 7; |
| |
| quant_val = vp8_dc_uv_quant(Q, cpi->common.uvdc_delta_q); |
| cpi->UVquant_fast[Q][0] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->UVquant[Q] + 0, |
| cpi->UVquant_shift[Q] + 0, quant_val); |
| cpi->UVzbin[Q][0] = ((qzbin_factors[Q] * quant_val) + 64) >> 7;; |
| cpi->UVround[Q][0] = (qrounding_factors[Q] * quant_val) >> 7; |
| cpi->common.UVdequant[Q][0] = quant_val; |
| cpi->zrun_zbin_boost_uv[Q][0] = (quant_val * zbin_boost[0]) >> 7; |
| |
| /* all the ac values = ; */ |
| quant_val = vp8_ac_yquant(Q); |
| cpi->Y1quant_fast[Q][1] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->Y1quant[Q] + 1, |
| cpi->Y1quant_shift[Q] + 1, quant_val); |
| cpi->Y1zbin[Q][1] = ((qzbin_factors[Q] * quant_val) + 64) >> 7; |
| cpi->Y1round[Q][1] = (qrounding_factors[Q] * quant_val) >> 7; |
| cpi->common.Y1dequant[Q][1] = quant_val; |
| cpi->zrun_zbin_boost_y1[Q][1] = (quant_val * zbin_boost[1]) >> 7; |
| |
| quant_val = vp8_ac2quant(Q, cpi->common.y2ac_delta_q); |
| cpi->Y2quant_fast[Q][1] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->Y2quant[Q] + 1, |
| cpi->Y2quant_shift[Q] + 1, quant_val); |
| cpi->Y2zbin[Q][1] = ((qzbin_factors_y2[Q] * quant_val) + 64) >> 7; |
| cpi->Y2round[Q][1] = (qrounding_factors_y2[Q] * quant_val) >> 7; |
| cpi->common.Y2dequant[Q][1] = quant_val; |
| cpi->zrun_zbin_boost_y2[Q][1] = (quant_val * zbin_boost[1]) >> 7; |
| |
| quant_val = vp8_ac_uv_quant(Q, cpi->common.uvac_delta_q); |
| cpi->UVquant_fast[Q][1] = (1 << 16) / quant_val; |
| invert_quant(cpi->sf.improved_quant, cpi->UVquant[Q] + 1, |
| cpi->UVquant_shift[Q] + 1, quant_val); |
| cpi->UVzbin[Q][1] = ((qzbin_factors[Q] * quant_val) + 64) >> 7; |
| cpi->UVround[Q][1] = (qrounding_factors[Q] * quant_val) >> 7; |
| cpi->common.UVdequant[Q][1] = quant_val; |
| cpi->zrun_zbin_boost_uv[Q][1] = (quant_val * zbin_boost[1]) >> 7; |
| |
| for (i = 2; i < 16; i++) |
| { |
| cpi->Y1quant_fast[Q][i] = cpi->Y1quant_fast[Q][1]; |
| cpi->Y1quant[Q][i] = cpi->Y1quant[Q][1]; |
| cpi->Y1quant_shift[Q][i] = cpi->Y1quant_shift[Q][1]; |
| cpi->Y1zbin[Q][i] = cpi->Y1zbin[Q][1]; |
| cpi->Y1round[Q][i] = cpi->Y1round[Q][1]; |
| cpi->zrun_zbin_boost_y1[Q][i] = (cpi->common.Y1dequant[Q][1] * |
| zbin_boost[i]) >> 7; |
| |
| cpi->Y2quant_fast[Q][i] = cpi->Y2quant_fast[Q][1]; |
| cpi->Y2quant[Q][i] = cpi->Y2quant[Q][1]; |
| cpi->Y2quant_shift[Q][i] = cpi->Y2quant_shift[Q][1]; |
| cpi->Y2zbin[Q][i] = cpi->Y2zbin[Q][1]; |
| cpi->Y2round[Q][i] = cpi->Y2round[Q][1]; |
| cpi->zrun_zbin_boost_y2[Q][i] = (cpi->common.Y2dequant[Q][1] * |
| zbin_boost[i]) >> 7; |
| |
| cpi->UVquant_fast[Q][i] = cpi->UVquant_fast[Q][1]; |
| cpi->UVquant[Q][i] = cpi->UVquant[Q][1]; |
| cpi->UVquant_shift[Q][i] = cpi->UVquant_shift[Q][1]; |
| cpi->UVzbin[Q][i] = cpi->UVzbin[Q][1]; |
| cpi->UVround[Q][i] = cpi->UVround[Q][1]; |
| cpi->zrun_zbin_boost_uv[Q][i] = (cpi->common.UVdequant[Q][1] * |
| zbin_boost[i]) >> 7; |
| } |
| } |
| } |
| |
| #define ZBIN_EXTRA_Y \ |
| (( cpi->common.Y1dequant[QIndex][1] * \ |
| ( x->zbin_over_quant + \ |
| x->zbin_mode_boost + \ |
| x->act_zbin_adj ) ) >> 7) |
| |
| #define ZBIN_EXTRA_UV \ |
| (( cpi->common.UVdequant[QIndex][1] * \ |
| ( x->zbin_over_quant + \ |
| x->zbin_mode_boost + \ |
| x->act_zbin_adj ) ) >> 7) |
| |
| #define ZBIN_EXTRA_Y2 \ |
| (( cpi->common.Y2dequant[QIndex][1] * \ |
| ( (x->zbin_over_quant / 2) + \ |
| x->zbin_mode_boost + \ |
| x->act_zbin_adj ) ) >> 7) |
| |
| void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x, int ok_to_skip) |
| { |
| int i; |
| int QIndex; |
| MACROBLOCKD *xd = &x->e_mbd; |
| int zbin_extra; |
| |
| /* Select the baseline MB Q index. */ |
| if (xd->segmentation_enabled) |
| { |
| /* Abs Value */ |
| if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA) |
| QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][xd->mode_info_context->mbmi.segment_id]; |
| /* Delta Value */ |
| else |
| { |
| QIndex = cpi->common.base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][xd->mode_info_context->mbmi.segment_id]; |
| /* Clamp to valid range */ |
| QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; |
| } |
| } |
| else |
| QIndex = cpi->common.base_qindex; |
| |
| /* This initialization should be called at least once. Use ok_to_skip to |
| * decide if it is ok to skip. |
| * Before encoding a frame, this function is always called with ok_to_skip |
| * =0, which means no skiping of calculations. The "last" values are |
| * initialized at that time. |
| */ |
| if (!ok_to_skip || QIndex != x->q_index) |
| { |
| |
| xd->dequant_y1_dc[0] = 1; |
| xd->dequant_y1[0] = cpi->common.Y1dequant[QIndex][0]; |
| xd->dequant_y2[0] = cpi->common.Y2dequant[QIndex][0]; |
| xd->dequant_uv[0] = cpi->common.UVdequant[QIndex][0]; |
| |
| for (i = 1; i < 16; i++) |
| { |
| xd->dequant_y1_dc[i] = |
| xd->dequant_y1[i] = cpi->common.Y1dequant[QIndex][1]; |
| xd->dequant_y2[i] = cpi->common.Y2dequant[QIndex][1]; |
| xd->dequant_uv[i] = cpi->common.UVdequant[QIndex][1]; |
| } |
| #if 1 |
| /*TODO: Remove dequant from BLOCKD. This is a temporary solution until |
| * the quantizer code uses a passed in pointer to the dequant constants. |
| * This will also require modifications to the x86 and neon assembly. |
| * */ |
| for (i = 0; i < 16; i++) |
| x->e_mbd.block[i].dequant = xd->dequant_y1; |
| for (i = 16; i < 24; i++) |
| x->e_mbd.block[i].dequant = xd->dequant_uv; |
| x->e_mbd.block[24].dequant = xd->dequant_y2; |
| #endif |
| |
| /* Y */ |
| zbin_extra = ZBIN_EXTRA_Y; |
| |
| for (i = 0; i < 16; i++) |
| { |
| x->block[i].quant = cpi->Y1quant[QIndex]; |
| x->block[i].quant_fast = cpi->Y1quant_fast[QIndex]; |
| x->block[i].quant_shift = cpi->Y1quant_shift[QIndex]; |
| x->block[i].zbin = cpi->Y1zbin[QIndex]; |
| x->block[i].round = cpi->Y1round[QIndex]; |
| x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_y1[QIndex]; |
| x->block[i].zbin_extra = (short)zbin_extra; |
| } |
| |
| /* UV */ |
| zbin_extra = ZBIN_EXTRA_UV; |
| |
| for (i = 16; i < 24; i++) |
| { |
| x->block[i].quant = cpi->UVquant[QIndex]; |
| x->block[i].quant_fast = cpi->UVquant_fast[QIndex]; |
| x->block[i].quant_shift = cpi->UVquant_shift[QIndex]; |
| x->block[i].zbin = cpi->UVzbin[QIndex]; |
| x->block[i].round = cpi->UVround[QIndex]; |
| x->block[i].zrun_zbin_boost = cpi->zrun_zbin_boost_uv[QIndex]; |
| x->block[i].zbin_extra = (short)zbin_extra; |
| } |
| |
| /* Y2 */ |
| zbin_extra = ZBIN_EXTRA_Y2; |
| |
| x->block[24].quant_fast = cpi->Y2quant_fast[QIndex]; |
| x->block[24].quant = cpi->Y2quant[QIndex]; |
| x->block[24].quant_shift = cpi->Y2quant_shift[QIndex]; |
| x->block[24].zbin = cpi->Y2zbin[QIndex]; |
| x->block[24].round = cpi->Y2round[QIndex]; |
| x->block[24].zrun_zbin_boost = cpi->zrun_zbin_boost_y2[QIndex]; |
| x->block[24].zbin_extra = (short)zbin_extra; |
| |
| /* save this macroblock QIndex for vp8_update_zbin_extra() */ |
| x->q_index = QIndex; |
| |
| x->last_zbin_over_quant = x->zbin_over_quant; |
| x->last_zbin_mode_boost = x->zbin_mode_boost; |
| x->last_act_zbin_adj = x->act_zbin_adj; |
| |
| |
| |
| } |
| else if(x->last_zbin_over_quant != x->zbin_over_quant |
| || x->last_zbin_mode_boost != x->zbin_mode_boost |
| || x->last_act_zbin_adj != x->act_zbin_adj) |
| { |
| /* Y */ |
| zbin_extra = ZBIN_EXTRA_Y; |
| |
| for (i = 0; i < 16; i++) |
| x->block[i].zbin_extra = (short)zbin_extra; |
| |
| /* UV */ |
| zbin_extra = ZBIN_EXTRA_UV; |
| |
| for (i = 16; i < 24; i++) |
| x->block[i].zbin_extra = (short)zbin_extra; |
| |
| /* Y2 */ |
| zbin_extra = ZBIN_EXTRA_Y2; |
| x->block[24].zbin_extra = (short)zbin_extra; |
| |
| x->last_zbin_over_quant = x->zbin_over_quant; |
| x->last_zbin_mode_boost = x->zbin_mode_boost; |
| x->last_act_zbin_adj = x->act_zbin_adj; |
| } |
| } |
| |
| void vp8_update_zbin_extra(VP8_COMP *cpi, MACROBLOCK *x) |
| { |
| int i; |
| int QIndex = x->q_index; |
| int zbin_extra; |
| |
| /* Y */ |
| zbin_extra = ZBIN_EXTRA_Y; |
| |
| for (i = 0; i < 16; i++) |
| x->block[i].zbin_extra = (short)zbin_extra; |
| |
| /* UV */ |
| zbin_extra = ZBIN_EXTRA_UV; |
| |
| for (i = 16; i < 24; i++) |
| x->block[i].zbin_extra = (short)zbin_extra; |
| |
| /* Y2 */ |
| zbin_extra = ZBIN_EXTRA_Y2; |
| x->block[24].zbin_extra = (short)zbin_extra; |
| } |
| #undef ZBIN_EXTRA_Y |
| #undef ZBIN_EXTRA_UV |
| #undef ZBIN_EXTRA_Y2 |
| |
| void vp8cx_frame_init_quantizer(VP8_COMP *cpi) |
| { |
| /* Clear Zbin mode boost for default case */ |
| cpi->mb.zbin_mode_boost = 0; |
| |
| /* MB level quantizer setup */ |
| vp8cx_mb_init_quantizer(cpi, &cpi->mb, 0); |
| } |
| |
| |
| void vp8_set_quantizer(struct VP8_COMP *cpi, int Q) |
| { |
| VP8_COMMON *cm = &cpi->common; |
| MACROBLOCKD *mbd = &cpi->mb.e_mbd; |
| int update = 0; |
| int new_delta_q; |
| int new_uv_delta_q; |
| cm->base_qindex = Q; |
| |
| /* if any of the delta_q values are changing update flag has to be set */ |
| /* currently only y2dc_delta_q may change */ |
| |
| cm->y1dc_delta_q = 0; |
| cm->y2ac_delta_q = 0; |
| |
| if (Q < 4) |
| { |
| new_delta_q = 4-Q; |
| } |
| else |
| new_delta_q = 0; |
| |
| update |= cm->y2dc_delta_q != new_delta_q; |
| cm->y2dc_delta_q = new_delta_q; |
| |
| new_uv_delta_q = 0; |
| // For screen content, lower the q value for UV channel. For now, select |
| // conservative delta; same delta for dc and ac, and decrease it with lower |
| // Q, and set to 0 below some threshold. May want to condition this in |
| // future on the variance/energy in UV channel. |
| if (cpi->oxcf.screen_content_mode && Q > 40) { |
| new_uv_delta_q = -(int)(0.15 * Q); |
| // Check range: magnitude of delta is 4 bits. |
| if (new_uv_delta_q < -15) { |
| new_uv_delta_q = -15; |
| } |
| } |
| update |= cm->uvdc_delta_q != new_uv_delta_q; |
| cm->uvdc_delta_q = new_uv_delta_q; |
| cm->uvac_delta_q = new_uv_delta_q; |
| |
| /* Set Segment specific quatizers */ |
| mbd->segment_feature_data[MB_LVL_ALT_Q][0] = cpi->segment_feature_data[MB_LVL_ALT_Q][0]; |
| mbd->segment_feature_data[MB_LVL_ALT_Q][1] = cpi->segment_feature_data[MB_LVL_ALT_Q][1]; |
| mbd->segment_feature_data[MB_LVL_ALT_Q][2] = cpi->segment_feature_data[MB_LVL_ALT_Q][2]; |
| mbd->segment_feature_data[MB_LVL_ALT_Q][3] = cpi->segment_feature_data[MB_LVL_ALT_Q][3]; |
| |
| /* quantizer has to be reinitialized for any delta_q changes */ |
| if(update) |
| vp8cx_init_quantizer(cpi); |
| |
| } |
