ref: 30c22d842cffc737de00388af972110b89b1547c
dir: /vp9/encoder/arm/neon/vp9_quantize_neon.c/
/* * Copyright (c) 2014 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 <arm_neon.h> #include <assert.h> #include <math.h> #include "./vpx_config.h" #include "vpx_mem/vpx_mem.h" #include "vp9/common/vp9_quant_common.h" #include "vp9/common/vp9_seg_common.h" #include "vp9/encoder/vp9_encoder.h" #include "vp9/encoder/vp9_quantize.h" #include "vp9/encoder/vp9_rd.h" #include "vpx_dsp/arm/idct_neon.h" #include "vpx_dsp/arm/mem_neon.h" #include "vpx_dsp/vpx_dsp_common.h" void vp9_quantize_fp_neon(const tran_low_t *coeff_ptr, intptr_t count, int skip_block, const int16_t *round_ptr, const int16_t *quant_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr, const int16_t *scan, const int16_t *iscan) { // Quantization pass: All coefficients with index >= zero_flag are // skippable. Note: zero_flag can be zero. int i; const int16x8_t v_zero = vdupq_n_s16(0); const int16x8_t v_one = vdupq_n_s16(1); int16x8_t v_eobmax_76543210 = vdupq_n_s16(-1); int16x8_t v_round = vmovq_n_s16(round_ptr[1]); int16x8_t v_quant = vmovq_n_s16(quant_ptr[1]); int16x8_t v_dequant = vmovq_n_s16(dequant_ptr[1]); (void)scan; (void)skip_block; assert(!skip_block); // adjust for dc v_round = vsetq_lane_s16(round_ptr[0], v_round, 0); v_quant = vsetq_lane_s16(quant_ptr[0], v_quant, 0); v_dequant = vsetq_lane_s16(dequant_ptr[0], v_dequant, 0); // process dc and the first seven ac coeffs { const int16x8_t v_iscan = vld1q_s16(&iscan[0]); const int16x8_t v_coeff = load_tran_low_to_s16q(coeff_ptr); const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); const int32x4_t v_tmp_lo = vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant)); const int32x4_t v_tmp_hi = vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant)); const int16x8_t v_tmp2 = vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16)); const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); store_s16q_to_tran_low(qcoeff_ptr, v_qcoeff); store_s16q_to_tran_low(dqcoeff_ptr, v_dqcoeff); v_round = vmovq_n_s16(round_ptr[1]); v_quant = vmovq_n_s16(quant_ptr[1]); v_dequant = vmovq_n_s16(dequant_ptr[1]); } // now process the rest of the ac coeffs for (i = 8; i < count; i += 8) { const int16x8_t v_iscan = vld1q_s16(&iscan[i]); const int16x8_t v_coeff = load_tran_low_to_s16q(coeff_ptr + i); const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); const int16x8_t v_tmp = vabaq_s16(v_round, v_coeff, v_zero); const int32x4_t v_tmp_lo = vmull_s16(vget_low_s16(v_tmp), vget_low_s16(v_quant)); const int32x4_t v_tmp_hi = vmull_s16(vget_high_s16(v_tmp), vget_high_s16(v_quant)); const int16x8_t v_tmp2 = vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16)); const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); const int16x8_t v_iscan_plus1 = vaddq_s16(v_iscan, v_one); const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, v_zero, v_iscan_plus1); const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); const int16x8_t v_dqcoeff = vmulq_s16(v_qcoeff, v_dequant); v_eobmax_76543210 = vmaxq_s16(v_eobmax_76543210, v_nz_iscan); store_s16q_to_tran_low(qcoeff_ptr + i, v_qcoeff); store_s16q_to_tran_low(dqcoeff_ptr + i, v_dqcoeff); } { const int16x4_t v_eobmax_3210 = vmax_s16(vget_low_s16(v_eobmax_76543210), vget_high_s16(v_eobmax_76543210)); const int64x1_t v_eobmax_xx32 = vshr_n_s64(vreinterpret_s64_s16(v_eobmax_3210), 32); const int16x4_t v_eobmax_tmp = vmax_s16(v_eobmax_3210, vreinterpret_s16_s64(v_eobmax_xx32)); const int64x1_t v_eobmax_xxx3 = vshr_n_s64(vreinterpret_s64_s16(v_eobmax_tmp), 16); const int16x4_t v_eobmax_final = vmax_s16(v_eobmax_tmp, vreinterpret_s16_s64(v_eobmax_xxx3)); *eob_ptr = (uint16_t)vget_lane_s16(v_eobmax_final, 0); } } static INLINE int32x4_t extract_sign_bit(int32x4_t a) { return vreinterpretq_s32_u32(vshrq_n_u32(vreinterpretq_u32_s32(a), 31)); } void vp9_quantize_fp_32x32_neon(const tran_low_t *coeff_ptr, intptr_t count, int skip_block, const int16_t *round_ptr, const int16_t *quant_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr, const int16_t *scan, const int16_t *iscan_ptr) { const int16x8_t one = vdupq_n_s16(1); const int16x8_t neg_one = vdupq_n_s16(-1); // ROUND_POWER_OF_TWO(round_ptr[], 1) const int16x8_t round = vrshrq_n_s16(vld1q_s16(round_ptr), 1); const int16x8_t quant = vld1q_s16(quant_ptr); const int16x4_t dequant = vld1_s16(dequant_ptr); // dequant >> 2 is used similar to zbin as a threshold. const int16x8_t dequant_thresh = vshrq_n_s16(vld1q_s16(dequant_ptr), 2); // Process dc and the first seven ac coeffs. const uint16x8_t iscan = vreinterpretq_u16_s16(vaddq_s16(vld1q_s16(iscan_ptr), one)); const int16x8_t coeff = load_tran_low_to_s16q(coeff_ptr); const int16x8_t coeff_sign = vshrq_n_s16(coeff, 15); const int16x8_t coeff_abs = vabsq_s16(coeff); const int16x8_t dequant_mask = vreinterpretq_s16_u16(vcgeq_s16(coeff_abs, dequant_thresh)); int16x8_t qcoeff = vaddq_s16(coeff_abs, round); int32x4_t dqcoeff_0, dqcoeff_1; int16x8_t dqcoeff; uint16x8_t eob_max; (void)scan; (void)count; (void)skip_block; assert(!skip_block); // coeff * quant_ptr[]) >> 15 qcoeff = vqdmulhq_s16(qcoeff, quant); // Restore sign. qcoeff = veorq_s16(qcoeff, coeff_sign); qcoeff = vsubq_s16(qcoeff, coeff_sign); qcoeff = vandq_s16(qcoeff, dequant_mask); // qcoeff * dequant[] / 2 dqcoeff_0 = vmull_s16(vget_low_s16(qcoeff), dequant); dqcoeff_1 = vmull_n_s16(vget_high_s16(qcoeff), dequant_ptr[1]); // Add 1 if negative to round towards zero because the C uses division. dqcoeff_0 = vaddq_s32(dqcoeff_0, extract_sign_bit(dqcoeff_0)); dqcoeff_1 = vaddq_s32(dqcoeff_1, extract_sign_bit(dqcoeff_1)); dqcoeff = vcombine_s16(vshrn_n_s32(dqcoeff_0, 1), vshrn_n_s32(dqcoeff_1, 1)); eob_max = vandq_u16(vtstq_s16(qcoeff, neg_one), iscan); store_s16q_to_tran_low(qcoeff_ptr, qcoeff); store_s16q_to_tran_low(dqcoeff_ptr, dqcoeff); iscan_ptr += 8; coeff_ptr += 8; qcoeff_ptr += 8; dqcoeff_ptr += 8; { int i; const int16x8_t round = vrshrq_n_s16(vmovq_n_s16(round_ptr[1]), 1); const int16x8_t quant = vmovq_n_s16(quant_ptr[1]); const int16x8_t dequant_thresh = vshrq_n_s16(vmovq_n_s16(dequant_ptr[1]), 2); // Process the rest of the ac coeffs. for (i = 8; i < 32 * 32; i += 8) { const uint16x8_t iscan = vreinterpretq_u16_s16(vaddq_s16(vld1q_s16(iscan_ptr), one)); const int16x8_t coeff = load_tran_low_to_s16q(coeff_ptr); const int16x8_t coeff_sign = vshrq_n_s16(coeff, 15); const int16x8_t coeff_abs = vabsq_s16(coeff); const int16x8_t dequant_mask = vreinterpretq_s16_u16(vcgeq_s16(coeff_abs, dequant_thresh)); int16x8_t qcoeff = vaddq_s16(coeff_abs, round); int32x4_t dqcoeff_0, dqcoeff_1; int16x8_t dqcoeff; qcoeff = vqdmulhq_s16(qcoeff, quant); qcoeff = veorq_s16(qcoeff, coeff_sign); qcoeff = vsubq_s16(qcoeff, coeff_sign); qcoeff = vandq_s16(qcoeff, dequant_mask); dqcoeff_0 = vmull_n_s16(vget_low_s16(qcoeff), dequant_ptr[1]); dqcoeff_1 = vmull_n_s16(vget_high_s16(qcoeff), dequant_ptr[1]); dqcoeff_0 = vaddq_s32(dqcoeff_0, extract_sign_bit(dqcoeff_0)); dqcoeff_1 = vaddq_s32(dqcoeff_1, extract_sign_bit(dqcoeff_1)); dqcoeff = vcombine_s16(vshrn_n_s32(dqcoeff_0, 1), vshrn_n_s32(dqcoeff_1, 1)); eob_max = vmaxq_u16(eob_max, vandq_u16(vtstq_s16(qcoeff, neg_one), iscan)); store_s16q_to_tran_low(qcoeff_ptr, qcoeff); store_s16q_to_tran_low(dqcoeff_ptr, dqcoeff); iscan_ptr += 8; coeff_ptr += 8; qcoeff_ptr += 8; dqcoeff_ptr += 8; } { const uint16x4_t eob_max_0 = vmax_u16(vget_low_u16(eob_max), vget_high_u16(eob_max)); const uint16x4_t eob_max_1 = vpmax_u16(eob_max_0, eob_max_0); const uint16x4_t eob_max_2 = vpmax_u16(eob_max_1, eob_max_1); vst1_lane_u16(eob_ptr, eob_max_2, 0); } } }