forked from mirror/libbpg
108 lines
4.2 KiB
C++
108 lines
4.2 KiB
C++
/*****************************************************************************
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* Copyright (C) 2013 x265 project
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*
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* Authors: Steve Borho <steve@borho.org>
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* Mandar Gurav <mandar@multicorewareinc.com>
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* Deepthi Devaki Akkoorath <deepthidevaki@multicorewareinc.com>
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* Mahesh Pittala <mahesh@multicorewareinc.com>
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* Rajesh Paulraj <rajesh@multicorewareinc.com>
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* Min Chen <min.chen@multicorewareinc.com>
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* Praveen Kumar Tiwari <praveen@multicorewareinc.com>
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* Nabajit Deka <nabajit@multicorewareinc.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at license @ x265.com.
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*****************************************************************************/
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#include "common.h"
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#include "primitives.h"
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#include <xmmintrin.h> // SSE
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#include <smmintrin.h> // SSE4.1
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using namespace X265_NS;
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static void dequant_scaling(const int16_t* quantCoef, const int32_t *deQuantCoef, int16_t* coef, int num, int per, int shift)
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{
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X265_CHECK(num <= 32 * 32, "dequant num too large\n");
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int valueToAdd;
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shift += 4;
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if (shift > per)
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{
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valueToAdd = 1 << (shift - per - 1);
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__m128i IAdd = _mm_set1_epi32(valueToAdd);
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for (int n = 0; n < num; n = n + 8)
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{
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__m128i quantCoef1, quantCoef2, deQuantCoef1, deQuantCoef2, quantCoef12, sign;
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quantCoef12 = _mm_loadu_si128((__m128i*)(quantCoef + n));
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deQuantCoef1 = _mm_loadu_si128((__m128i*)(deQuantCoef + n));
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deQuantCoef2 = _mm_loadu_si128((__m128i*)(deQuantCoef + n + 4));
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sign = _mm_srai_epi16(quantCoef12, 15);
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quantCoef1 = _mm_unpacklo_epi16(quantCoef12, sign);
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quantCoef2 = _mm_unpackhi_epi16(quantCoef12, sign);
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quantCoef1 = _mm_sra_epi32(_mm_add_epi32(_mm_mullo_epi32(quantCoef1, deQuantCoef1), IAdd), _mm_cvtsi32_si128(shift - per));
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quantCoef2 = _mm_sra_epi32(_mm_add_epi32(_mm_mullo_epi32(quantCoef2, deQuantCoef2), IAdd), _mm_cvtsi32_si128(shift - per));
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quantCoef12 = _mm_packs_epi32(quantCoef1, quantCoef2);
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_mm_storeu_si128((__m128i*)(coef + n), quantCoef12);
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}
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}
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else
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{
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for (int n = 0; n < num; n = n + 8)
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{
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__m128i quantCoef1, quantCoef2, deQuantCoef1, deQuantCoef2, quantCoef12, sign;
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quantCoef12 = _mm_loadu_si128((__m128i*)(quantCoef + n));
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deQuantCoef1 = _mm_loadu_si128((__m128i*)(deQuantCoef + n));
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deQuantCoef2 = _mm_loadu_si128((__m128i*)(deQuantCoef + n + 4));
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sign = _mm_srai_epi16(quantCoef12, 15);
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quantCoef1 = _mm_unpacklo_epi16(quantCoef12, sign);
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quantCoef2 = _mm_unpackhi_epi16(quantCoef12, sign);
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quantCoef1 = _mm_mullo_epi32(quantCoef1, deQuantCoef1);
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quantCoef2 = _mm_mullo_epi32(quantCoef2, deQuantCoef2);
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quantCoef12 = _mm_packs_epi32(quantCoef1, quantCoef2);
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sign = _mm_srai_epi16(quantCoef12, 15);
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quantCoef1 = _mm_unpacklo_epi16(quantCoef12, sign);
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quantCoef2 = _mm_unpackhi_epi16(quantCoef12, sign);
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quantCoef1 = _mm_sll_epi32(quantCoef1, _mm_cvtsi32_si128(per - shift));
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quantCoef2 = _mm_sll_epi32(quantCoef2, _mm_cvtsi32_si128(per - shift));
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quantCoef12 = _mm_packs_epi32(quantCoef1, quantCoef2);
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_mm_storeu_si128((__m128i*)(coef + n), quantCoef12);
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}
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}
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}
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namespace X265_NS {
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void setupIntrinsicDCT_sse41(EncoderPrimitives &p)
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{
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p.dequant_scaling = dequant_scaling;
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}
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}
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