ref: 8256c8b297c8b7c7ee4de24edff82ed67d6ef207
dir: /vpx_dsp/x86/quantize_sse2.c/
/* * Copyright (c) 2015 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 <assert.h> #include <emmintrin.h> #include <xmmintrin.h> #include "./vpx_dsp_rtcd.h" #include "vpx/vpx_integer.h" #include "vpx_dsp/x86/bitdepth_conversion_sse2.h" #include "vpx_dsp/x86/quantize_sse2.h" void vpx_quantize_b_sse2(const tran_low_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, 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) { const __m128i zero = _mm_setzero_si128(); int index = 16; __m128i zbin, round, quant, dequant, shift; __m128i coeff0, coeff1, coeff0_sign, coeff1_sign; __m128i qcoeff0, qcoeff1; __m128i cmp_mask0, cmp_mask1; __m128i eob, eob0; (void)scan; (void)skip_block; assert(!skip_block); // Setup global values. load_b_values(zbin_ptr, &zbin, round_ptr, &round, quant_ptr, &quant, dequant_ptr, &dequant, quant_shift_ptr, &shift); // Do DC and first 15 AC. coeff0 = load_tran_low(coeff_ptr); coeff1 = load_tran_low(coeff_ptr + 8); // Poor man's abs(). coeff0_sign = _mm_srai_epi16(coeff0, 15); coeff1_sign = _mm_srai_epi16(coeff1, 15); qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign); qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign); cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin); zbin = _mm_unpackhi_epi64(zbin, zbin); // Switch DC to AC cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin); calculate_qcoeff(&qcoeff0, round, quant, shift); round = _mm_unpackhi_epi64(round, round); quant = _mm_unpackhi_epi64(quant, quant); shift = _mm_unpackhi_epi64(shift, shift); calculate_qcoeff(&qcoeff1, round, quant, shift); // Reinsert signs qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign); qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign); // Mask out zbin threshold coeffs qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0); qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1); store_tran_low(qcoeff0, qcoeff_ptr); store_tran_low(qcoeff1, qcoeff_ptr + 8); calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr); dequant = _mm_unpackhi_epi64(dequant, dequant); calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + 8); eob = scan_for_eob(&qcoeff0, &qcoeff1, cmp_mask0, cmp_mask1, iscan, 0, zero); // AC only loop. while (index < n_coeffs) { coeff0 = load_tran_low(coeff_ptr + index); coeff1 = load_tran_low(coeff_ptr + index + 8); coeff0_sign = _mm_srai_epi16(coeff0, 15); coeff1_sign = _mm_srai_epi16(coeff1, 15); qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign); qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign); cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin); cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin); calculate_qcoeff(&qcoeff0, round, quant, shift); calculate_qcoeff(&qcoeff1, round, quant, shift); qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign); qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign); qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0); qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1); store_tran_low(qcoeff0, qcoeff_ptr + index); store_tran_low(qcoeff1, qcoeff_ptr + index + 8); calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr + index); calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + index + 8); eob0 = scan_for_eob(&qcoeff0, &qcoeff1, cmp_mask0, cmp_mask1, iscan, index, zero); eob = _mm_max_epi16(eob, eob0); index += 16; } *eob_ptr = accumulate_eob(eob); }