256 lines
11 KiB
C
256 lines
11 KiB
C
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/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2000-2009 Josh Coalson
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* Copyright (C) 2011-2016 Xiph.Org Foundation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "private/cpu.h"
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#ifndef FLAC__INTEGER_ONLY_LIBRARY
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#ifndef FLAC__NO_ASM
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#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && defined FLAC__HAS_X86INTRIN
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#include "private/fixed.h"
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#ifdef FLAC__SSE2_SUPPORTED
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#include <emmintrin.h> /* SSE2 */
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#include <math.h>
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#include "private/macros.h"
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#include "share/compat.h"
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#include "FLAC/assert.h"
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#ifdef FLAC__CPU_IA32
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#define m128i_to_i64(dest, src) _mm_storel_epi64((__m128i*)&dest, src)
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#else
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#define m128i_to_i64(dest, src) dest = _mm_cvtsi128_si64(src)
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#endif
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FLAC__SSE_TARGET("sse2")
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uint32_t FLAC__fixed_compute_best_predictor_intrin_sse2(const FLAC__int32 data[], uint32_t data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
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{
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FLAC__uint32 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
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uint32_t i, order;
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__m128i total_err0, total_err1, total_err2;
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{
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FLAC__int32 itmp;
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__m128i last_error;
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last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0
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itmp = data[-2];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1
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itmp -= data[-3];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2
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itmp -= data[-3] - data[-4];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3
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total_err0 = total_err1 = _mm_setzero_si128();
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for(i = 0; i < data_len; i++) {
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__m128i err0, err1, tmp;
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err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0
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err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0
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#if 1 /* OPT_SSE */
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0
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err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
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#else
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last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1
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last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0
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err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
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#endif
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tmp = _mm_slli_si128(err0, 12); // e0 0 0 0
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last_error = _mm_srli_si128(err1, 4); // 0 e1 e2 e3
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last_error = _mm_or_si128(last_error, tmp); // e0 e1 e2 e3
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tmp = _mm_srai_epi32(err0, 31);
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err0 = _mm_xor_si128(err0, tmp);
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err0 = _mm_sub_epi32(err0, tmp);
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tmp = _mm_srai_epi32(err1, 31);
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err1 = _mm_xor_si128(err1, tmp);
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err1 = _mm_sub_epi32(err1, tmp);
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total_err0 = _mm_add_epi32(total_err0, err0); // 0 0 0 te0
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total_err1 = _mm_add_epi32(total_err1, err1); // te1 te2 te3 te4
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}
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}
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total_error_0 = _mm_cvtsi128_si32(total_err0);
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total_err2 = total_err1; // te1 te2 te3 te4
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total_err1 = _mm_srli_si128(total_err1, 8); // 0 0 te1 te2
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total_error_4 = _mm_cvtsi128_si32(total_err2);
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total_error_2 = _mm_cvtsi128_si32(total_err1);
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total_err2 = _mm_srli_si128(total_err2, 4); // 0 te1 te2 te3
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total_err1 = _mm_srli_si128(total_err1, 4); // 0 0 0 te1
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total_error_3 = _mm_cvtsi128_si32(total_err2);
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total_error_1 = _mm_cvtsi128_si32(total_err1);
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/* prefer higher order */
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if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
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order = 0;
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else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
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order = 1;
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else if(total_error_2 < flac_min(total_error_3, total_error_4))
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order = 2;
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else if(total_error_3 < total_error_4)
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order = 3;
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else
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order = 4;
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/* Estimate the expected number of bits per residual signal sample. */
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/* 'total_error*' is linearly related to the variance of the residual */
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/* signal, so we use it directly to compute E(|x|) */
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FLAC__ASSERT(data_len > 0 || total_error_0 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_1 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_2 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_3 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_4 == 0);
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residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
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return order;
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}
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FLAC__SSE_TARGET("sse2")
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uint32_t FLAC__fixed_compute_best_predictor_wide_intrin_sse2(const FLAC__int32 data[], uint32_t data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1])
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{
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FLAC__uint64 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4;
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uint32_t i, order;
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__m128i total_err0, total_err1, total_err3;
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{
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FLAC__int32 itmp;
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__m128i last_error, zero = _mm_setzero_si128();
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last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0
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itmp = data[-2];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1
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itmp -= data[-3];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2
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itmp -= data[-3] - data[-4];
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last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0));
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last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3
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total_err0 = total_err1 = total_err3 = _mm_setzero_si128();
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for(i = 0; i < data_len; i++) {
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__m128i err0, err1, tmp;
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err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0
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err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0
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#if 1 /* OPT_SSE */
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1
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err1 = _mm_sub_epi32(err1, last_error);
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last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0
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err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
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#else
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last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1
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last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0
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err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4
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#endif
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tmp = _mm_slli_si128(err0, 12); // e0 0 0 0
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last_error = _mm_srli_si128(err1, 4); // 0 e1 e2 e3
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last_error = _mm_or_si128(last_error, tmp); // e0 e1 e2 e3
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tmp = _mm_srai_epi32(err0, 31);
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err0 = _mm_xor_si128(err0, tmp);
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err0 = _mm_sub_epi32(err0, tmp);
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tmp = _mm_srai_epi32(err1, 31);
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err1 = _mm_xor_si128(err1, tmp);
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err1 = _mm_sub_epi32(err1, tmp);
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total_err0 = _mm_add_epi64(total_err0, err0); // 0 te0
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err0 = _mm_unpacklo_epi32(err1, zero); // 0 |e3| 0 |e4|
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err1 = _mm_unpackhi_epi32(err1, zero); // 0 |e1| 0 |e2|
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total_err3 = _mm_add_epi64(total_err3, err0); // te3 te4
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total_err1 = _mm_add_epi64(total_err1, err1); // te1 te2
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}
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}
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m128i_to_i64(total_error_0, total_err0);
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m128i_to_i64(total_error_4, total_err3);
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m128i_to_i64(total_error_2, total_err1);
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total_err3 = _mm_srli_si128(total_err3, 8); // 0 te3
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total_err1 = _mm_srli_si128(total_err1, 8); // 0 te1
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m128i_to_i64(total_error_3, total_err3);
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m128i_to_i64(total_error_1, total_err1);
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/* prefer higher order */
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if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4))
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order = 0;
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else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4))
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order = 1;
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else if(total_error_2 < flac_min(total_error_3, total_error_4))
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order = 2;
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else if(total_error_3 < total_error_4)
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order = 3;
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else
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order = 4;
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/* Estimate the expected number of bits per residual signal sample. */
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/* 'total_error*' is linearly related to the variance of the residual */
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/* signal, so we use it directly to compute E(|x|) */
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FLAC__ASSERT(data_len > 0 || total_error_0 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_1 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_2 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_3 == 0);
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FLAC__ASSERT(data_len > 0 || total_error_4 == 0);
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residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
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residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
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return order;
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}
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#endif /* FLAC__SSE2_SUPPORTED */
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#endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */
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#endif /* FLAC__NO_ASM */
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#endif /* FLAC__INTEGER_ONLY_LIBRARY */
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