/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2000,2001,2002,2003,2004 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
#include "FLAC/format.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* 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]
*/
unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__real 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__real 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__real residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
/*
* 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
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