1 /* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2000-2009 Josh Coalson 3 * Copyright (C) 2011-2014 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 #ifndef FLAC__PRIVATE__FIXED_H 34 #define FLAC__PRIVATE__FIXED_H 35 36 #ifdef HAVE_CONFIG_H 37 #include <config.h> 38 #endif 39 40 #include "private/cpu.h" 41 #include "private/float.h" 42 #include "FLAC/format.h" 43 44 /* 45 * FLAC__fixed_compute_best_predictor() 46 * -------------------------------------------------------------------- 47 * Compute the best fixed predictor and the expected bits-per-sample 48 * of the residual signal for each order. The _wide() version uses 49 * 64-bit integers which is statistically necessary when bits-per- 50 * sample + log2(blocksize) > 30 51 * 52 * IN data[0,data_len-1] 53 * IN data_len 54 * OUT residual_bits_per_sample[0,FLAC__MAX_FIXED_ORDER] 55 */ 56 #ifndef FLAC__INTEGER_ONLY_LIBRARY 57 unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 58 unsigned FLAC__fixed_compute_best_predictor_wide(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 59 # ifndef FLAC__NO_ASM 60 # if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && defined FLAC__HAS_X86INTRIN 61 # ifdef FLAC__SSE2_SUPPORTED 62 unsigned FLAC__fixed_compute_best_predictor_intrin_sse2(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1]); 63 unsigned FLAC__fixed_compute_best_predictor_wide_intrin_sse2(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1]); 64 # endif 65 # ifdef FLAC__SSSE3_SUPPORTED 66 unsigned FLAC__fixed_compute_best_predictor_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 67 unsigned FLAC__fixed_compute_best_predictor_wide_intrin_ssse3(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER + 1]); 68 # endif 69 # endif 70 # if defined FLAC__CPU_IA32 && defined FLAC__HAS_NASM 71 unsigned FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 72 # endif 73 # endif 74 #else 75 unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 76 unsigned FLAC__fixed_compute_best_predictor_wide(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 77 #endif 78 79 /* 80 * FLAC__fixed_compute_residual() 81 * -------------------------------------------------------------------- 82 * Compute the residual signal obtained from sutracting the predicted 83 * signal from the original. 84 * 85 * IN data[-order,data_len-1] original signal (NOTE THE INDICES!) 86 * IN data_len length of original signal 87 * IN order <= FLAC__MAX_FIXED_ORDER fixed-predictor order 88 * OUT residual[0,data_len-1] residual signal 89 */ 90 void FLAC__fixed_compute_residual(const FLAC__int32 data[], unsigned data_len, unsigned order, FLAC__int32 residual[]); 91 92 /* 93 * FLAC__fixed_restore_signal() 94 * -------------------------------------------------------------------- 95 * Restore the original signal by summing the residual and the 96 * predictor. 97 * 98 * IN residual[0,data_len-1] residual signal 99 * IN data_len length of original signal 100 * IN order <= FLAC__MAX_FIXED_ORDER fixed-predictor order 101 * *** IMPORTANT: the caller must pass in the historical samples: 102 * IN data[-order,-1] previously-reconstructed historical samples 103 * OUT data[0,data_len-1] original signal 104 */ 105 void FLAC__fixed_restore_signal(const FLAC__int32 residual[], unsigned data_len, unsigned order, FLAC__int32 data[]); 106 107 #endif 108
