Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
| 2 | * Copyright (C) 2000-2009 Josh Coalson |
| 3 | * Copyright (C) 2011-2016 Xiph.Org Foundation |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * - Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * - Neither the name of the Xiph.org Foundation nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #ifdef HAVE_CONFIG_H |
| 34 | # include <config.h> |
| 35 | #endif |
| 36 | |
| 37 | #include "private/cpu.h" |
| 38 | |
| 39 | #ifndef FLAC__INTEGER_ONLY_LIBRARY |
| 40 | #ifndef FLAC__NO_ASM |
| 41 | #if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN |
| 42 | #include "private/fixed.h" |
| 43 | #ifdef FLAC__SSSE3_SUPPORTED |
| 44 | |
| 45 | #include <tmmintrin.h> /* SSSE3 */ |
| 46 | #include <math.h> |
| 47 | #include "private/macros.h" |
| 48 | #include "share/compat.h" |
| 49 | #include "FLAC/assert.h" |
| 50 | |
| 51 | #ifdef FLAC__CPU_IA32 |
| 52 | #define m128i_to_i64(dest, src) _mm_storel_epi64((__m128i*)&dest, src) |
| 53 | #else |
| 54 | #define m128i_to_i64(dest, src) dest = _mm_cvtsi128_si64(src) |
| 55 | #endif |
| 56 | |
| 57 | FLAC__SSE_TARGET("ssse3") |
| 58 | unsigned FLAC__fixed_compute_best_predictor_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1]) |
| 59 | { |
| 60 | FLAC__uint32 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4; |
| 61 | unsigned i, order; |
| 62 | |
| 63 | __m128i total_err0, total_err1, total_err2; |
| 64 | |
| 65 | { |
| 66 | FLAC__int32 itmp; |
| 67 | __m128i last_error; |
| 68 | |
| 69 | last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0 |
| 70 | itmp = data[-2]; |
| 71 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 72 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1 |
| 73 | itmp -= data[-3]; |
| 74 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 75 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2 |
| 76 | itmp -= data[-3] - data[-4]; |
| 77 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 78 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3 |
| 79 | |
| 80 | total_err0 = total_err1 = _mm_setzero_si128(); |
| 81 | for(i = 0; i < data_len; i++) { |
| 82 | __m128i err0, err1; |
| 83 | err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0 |
| 84 | err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0 |
| 85 | #if 1 /* OPT_SSE */ |
| 86 | err1 = _mm_sub_epi32(err1, last_error); |
| 87 | last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2 |
| 88 | err1 = _mm_sub_epi32(err1, last_error); |
| 89 | last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1 |
| 90 | err1 = _mm_sub_epi32(err1, last_error); |
| 91 | last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0 |
| 92 | err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4 |
| 93 | #else |
| 94 | last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1 |
| 95 | last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0 |
| 96 | err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4 |
| 97 | #endif |
| 98 | last_error = _mm_alignr_epi8(err0, err1, 4); // e0 e1 e2 e3 |
| 99 | |
| 100 | err0 = _mm_abs_epi32(err0); |
| 101 | err1 = _mm_abs_epi32(err1); |
| 102 | |
| 103 | total_err0 = _mm_add_epi32(total_err0, err0); // 0 0 0 te0 |
| 104 | total_err1 = _mm_add_epi32(total_err1, err1); // te1 te2 te3 te4 |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | total_error_0 = _mm_cvtsi128_si32(total_err0); |
| 109 | total_err2 = total_err1; // te1 te2 te3 te4 |
| 110 | total_err1 = _mm_srli_si128(total_err1, 8); // 0 0 te1 te2 |
| 111 | total_error_4 = _mm_cvtsi128_si32(total_err2); |
| 112 | total_error_2 = _mm_cvtsi128_si32(total_err1); |
| 113 | total_err2 = _mm_srli_si128(total_err2, 4); // 0 te1 te2 te3 |
| 114 | total_err1 = _mm_srli_si128(total_err1, 4); // 0 0 0 te1 |
| 115 | total_error_3 = _mm_cvtsi128_si32(total_err2); |
| 116 | total_error_1 = _mm_cvtsi128_si32(total_err1); |
| 117 | |
| 118 | /* prefer higher order */ |
| 119 | if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4)) |
| 120 | order = 0; |
| 121 | else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4)) |
| 122 | order = 1; |
| 123 | else if(total_error_2 < flac_min(total_error_3, total_error_4)) |
| 124 | order = 2; |
| 125 | else if(total_error_3 < total_error_4) |
| 126 | order = 3; |
| 127 | else |
| 128 | order = 4; |
| 129 | |
| 130 | /* Estimate the expected number of bits per residual signal sample. */ |
| 131 | /* 'total_error*' is linearly related to the variance of the residual */ |
| 132 | /* signal, so we use it directly to compute E(|x|) */ |
| 133 | FLAC__ASSERT(data_len > 0 || total_error_0 == 0); |
| 134 | FLAC__ASSERT(data_len > 0 || total_error_1 == 0); |
| 135 | FLAC__ASSERT(data_len > 0 || total_error_2 == 0); |
| 136 | FLAC__ASSERT(data_len > 0 || total_error_3 == 0); |
| 137 | FLAC__ASSERT(data_len > 0 || total_error_4 == 0); |
| 138 | |
| 139 | residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0); |
| 140 | residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0); |
| 141 | residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0); |
| 142 | residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0); |
| 143 | residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0); |
| 144 | |
| 145 | return order; |
| 146 | } |
| 147 | |
| 148 | FLAC__SSE_TARGET("ssse3") |
| 149 | unsigned FLAC__fixed_compute_best_predictor_wide_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1]) |
| 150 | { |
| 151 | FLAC__uint64 total_error_0, total_error_1, total_error_2, total_error_3, total_error_4; |
| 152 | unsigned i, order; |
| 153 | |
| 154 | __m128i total_err0, total_err1, total_err3; |
| 155 | |
| 156 | { |
| 157 | FLAC__int32 itmp; |
| 158 | __m128i last_error, zero = _mm_setzero_si128(); |
| 159 | |
| 160 | last_error = _mm_cvtsi32_si128(data[-1]); // 0 0 0 le0 |
| 161 | itmp = data[-2]; |
| 162 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 163 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 0 le0 le1 |
| 164 | itmp -= data[-3]; |
| 165 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 166 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // 0 le0 le1 le2 |
| 167 | itmp -= data[-3] - data[-4]; |
| 168 | last_error = _mm_shuffle_epi32(last_error, _MM_SHUFFLE(2,1,0,0)); |
| 169 | last_error = _mm_sub_epi32(last_error, _mm_cvtsi32_si128(itmp)); // le0 le1 le2 le3 |
| 170 | |
| 171 | total_err0 = total_err1 = total_err3 = _mm_setzero_si128(); |
| 172 | for(i = 0; i < data_len; i++) { |
| 173 | __m128i err0, err1; |
| 174 | err0 = _mm_cvtsi32_si128(data[i]); // 0 0 0 e0 |
| 175 | err1 = _mm_shuffle_epi32(err0, _MM_SHUFFLE(0,0,0,0)); // e0 e0 e0 e0 |
| 176 | #if 1 /* OPT_SSE */ |
| 177 | err1 = _mm_sub_epi32(err1, last_error); |
| 178 | last_error = _mm_srli_si128(last_error, 4); // 0 le0 le1 le2 |
| 179 | err1 = _mm_sub_epi32(err1, last_error); |
| 180 | last_error = _mm_srli_si128(last_error, 4); // 0 0 le0 le1 |
| 181 | err1 = _mm_sub_epi32(err1, last_error); |
| 182 | last_error = _mm_srli_si128(last_error, 4); // 0 0 0 le0 |
| 183 | err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4 |
| 184 | #else |
| 185 | last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 8)); // le0 le1 le2+le0 le3+le1 |
| 186 | last_error = _mm_add_epi32(last_error, _mm_srli_si128(last_error, 4)); // le0 le1+le0 le2+le0+le1 le3+le1+le2+le0 |
| 187 | err1 = _mm_sub_epi32(err1, last_error); // e1 e2 e3 e4 |
| 188 | #endif |
| 189 | last_error = _mm_alignr_epi8(err0, err1, 4); // e0 e1 e2 e3 |
| 190 | |
| 191 | err0 = _mm_abs_epi32(err0); |
| 192 | err1 = _mm_abs_epi32(err1); // |e1| |e2| |e3| |e4| |
| 193 | |
| 194 | total_err0 = _mm_add_epi64(total_err0, err0); // 0 te0 |
| 195 | err0 = _mm_unpacklo_epi32(err1, zero); // 0 |e3| 0 |e4| |
| 196 | err1 = _mm_unpackhi_epi32(err1, zero); // 0 |e1| 0 |e2| |
| 197 | total_err3 = _mm_add_epi64(total_err3, err0); // te3 te4 |
| 198 | total_err1 = _mm_add_epi64(total_err1, err1); // te1 te2 |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | m128i_to_i64(total_error_0, total_err0); |
| 203 | m128i_to_i64(total_error_4, total_err3); |
| 204 | m128i_to_i64(total_error_2, total_err1); |
| 205 | total_err3 = _mm_srli_si128(total_err3, 8); // 0 te3 |
| 206 | total_err1 = _mm_srli_si128(total_err1, 8); // 0 te1 |
| 207 | m128i_to_i64(total_error_3, total_err3); |
| 208 | m128i_to_i64(total_error_1, total_err1); |
| 209 | |
| 210 | /* prefer higher order */ |
| 211 | if(total_error_0 < flac_min(flac_min(flac_min(total_error_1, total_error_2), total_error_3), total_error_4)) |
| 212 | order = 0; |
| 213 | else if(total_error_1 < flac_min(flac_min(total_error_2, total_error_3), total_error_4)) |
| 214 | order = 1; |
| 215 | else if(total_error_2 < flac_min(total_error_3, total_error_4)) |
| 216 | order = 2; |
| 217 | else if(total_error_3 < total_error_4) |
| 218 | order = 3; |
| 219 | else |
| 220 | order = 4; |
| 221 | |
| 222 | /* Estimate the expected number of bits per residual signal sample. */ |
| 223 | /* 'total_error*' is linearly related to the variance of the residual */ |
| 224 | /* signal, so we use it directly to compute E(|x|) */ |
| 225 | FLAC__ASSERT(data_len > 0 || total_error_0 == 0); |
| 226 | FLAC__ASSERT(data_len > 0 || total_error_1 == 0); |
| 227 | FLAC__ASSERT(data_len > 0 || total_error_2 == 0); |
| 228 | FLAC__ASSERT(data_len > 0 || total_error_3 == 0); |
| 229 | FLAC__ASSERT(data_len > 0 || total_error_4 == 0); |
| 230 | |
| 231 | residual_bits_per_sample[0] = (float)((total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0); |
| 232 | residual_bits_per_sample[1] = (float)((total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0); |
| 233 | residual_bits_per_sample[2] = (float)((total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0); |
| 234 | residual_bits_per_sample[3] = (float)((total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0); |
| 235 | residual_bits_per_sample[4] = (float)((total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0); |
| 236 | |
| 237 | return order; |
| 238 | } |
| 239 | |
| 240 | #endif /* FLAC__SSSE3_SUPPORTED */ |
| 241 | #endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */ |
| 242 | #endif /* FLAC__NO_ASM */ |
| 243 | #endif /* FLAC__INTEGER_ONLY_LIBRARY */ |