| /* libFLAC - Free Lossless Audio Codec library |
| * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of the Xiph.org Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef FLAC__PRIVATE__FIXED_H |
| #define FLAC__PRIVATE__FIXED_H |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "private/float.h" |
| #include "FLAC/format.h" |
| |
| /* |
| * FLAC__fixed_compute_best_predictor() |
| * -------------------------------------------------------------------- |
| * Compute the best fixed predictor and the expected bits-per-sample |
| * of the residual signal for each order. The _wide() version uses |
| * 64-bit integers which is statistically necessary when bits-per- |
| * sample + log2(blocksize) > 30 |
| * |
| * IN data[0,data_len-1] |
| * IN data_len |
| * OUT residual_bits_per_sample[0,FLAC__MAX_FIXED_ORDER] |
| */ |
| #ifndef FLAC__INTEGER_ONLY_LIBRARY |
| unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); |
| # ifndef FLAC__NO_ASM |
| # ifdef FLAC__CPU_IA32 |
| # ifdef FLAC__HAS_NASM |
| 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]); |
| # endif |
| # endif |
| # endif |
| 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]); |
| #else |
| unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); |
| 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]); |
| #endif |
| |
| /* |
| * FLAC__fixed_compute_residual() |
| * -------------------------------------------------------------------- |
| * Compute the residual signal obtained from sutracting the predicted |
| * signal from the original. |
| * |
| * IN data[-order,data_len-1] original signal (NOTE THE INDICES!) |
| * IN data_len length of original signal |
| * IN order <= FLAC__MAX_FIXED_ORDER fixed-predictor order |
| * OUT residual[0,data_len-1] residual signal |
| */ |
| void FLAC__fixed_compute_residual(const FLAC__int32 data[], unsigned data_len, unsigned order, FLAC__int32 residual[]); |
| |
| /* |
| * FLAC__fixed_restore_signal() |
| * -------------------------------------------------------------------- |
| * Restore the original signal by summing the residual and the |
| * predictor. |
| * |
| * IN residual[0,data_len-1] residual signal |
| * IN data_len length of original signal |
| * IN order <= FLAC__MAX_FIXED_ORDER fixed-predictor order |
| * *** IMPORTANT: the caller must pass in the historical samples: |
| * IN data[-order,-1] previously-reconstructed historical samples |
| * OUT data[0,data_len-1] original signal |
| */ |
| void FLAC__fixed_restore_signal(const FLAC__int32 residual[], unsigned data_len, unsigned order, FLAC__int32 data[]); |
| |
| #endif |
