mirror of
https://codeberg.org/ashley/poke.git
synced 2024-11-25 00:28:05 +01:00
80 lines
3.5 KiB
C
80 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 2011 Apple Inc. All rights reserved.
|
|
*
|
|
* @APPLE_APACHE_LICENSE_HEADER_START@
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_APACHE_LICENSE_HEADER_END@
|
|
*/
|
|
|
|
/*
|
|
File: matrixlib.h
|
|
|
|
Contains: ALAC mixing/matrixing routines to/from 32-bit predictor buffers.
|
|
|
|
Copyright: Copyright (C) 2004 to 2011 Apple, Inc.
|
|
*/
|
|
|
|
#ifndef __MATRIXLIB_H
|
|
#define __MATRIXLIB_H
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// 16-bit routines
|
|
void mix16( int16_t * in, uint32_t stride, int32_t * u, int32_t * v, int32_t numSamples, int32_t mixbits, int32_t mixres );
|
|
void unmix16( int32_t * u, int32_t * v, int16_t * out, uint32_t stride, int32_t numSamples, int32_t mixbits, int32_t mixres );
|
|
|
|
// 20-bit routines
|
|
void mix20( uint8_t * in, uint32_t stride, int32_t * u, int32_t * v, int32_t numSamples, int32_t mixbits, int32_t mixres );
|
|
void unmix20( int32_t * u, int32_t * v, uint8_t * out, uint32_t stride, int32_t numSamples, int32_t mixbits, int32_t mixres );
|
|
|
|
// 24-bit routines
|
|
// - 24-bit data sometimes compresses better by shifting off the bottom byte so these routines deal with
|
|
// the specified "unused lower bytes" in the combined "shift" buffer
|
|
void mix24( uint8_t * in, uint32_t stride, int32_t * u, int32_t * v, int32_t numSamples,
|
|
int32_t mixbits, int32_t mixres, uint16_t * shiftUV, int32_t bytesShifted );
|
|
void unmix24( int32_t * u, int32_t * v, uint8_t * out, uint32_t stride, int32_t numSamples,
|
|
int32_t mixbits, int32_t mixres, uint16_t * shiftUV, int32_t bytesShifted );
|
|
|
|
// 32-bit routines
|
|
// - note that these really expect the internal data width to be < 32-bit but the arrays are 32-bit
|
|
// - otherwise, the calculations might overflow into the 33rd bit and be lost
|
|
// - therefore, these routines deal with the specified "unused lower" bytes in the combined "shift" buffer
|
|
void mix32( int32_t * in, uint32_t stride, int32_t * u, int32_t * v, int32_t numSamples,
|
|
int32_t mixbits, int32_t mixres, uint16_t * shiftUV, int32_t bytesShifted );
|
|
void unmix32( int32_t * u, int32_t * v, int32_t * out, uint32_t stride, int32_t numSamples,
|
|
int32_t mixbits, int32_t mixres, uint16_t * shiftUV, int32_t bytesShifted );
|
|
|
|
// 20/24/32-bit <-> 32-bit helper routines (not really matrixing but convenient to put here)
|
|
void copy20ToPredictor( uint8_t * in, uint32_t stride, int32_t * out, int32_t numSamples );
|
|
void copy24ToPredictor( uint8_t * in, uint32_t stride, int32_t * out, int32_t numSamples );
|
|
|
|
void copyPredictorTo24( int32_t * in, uint8_t * out, uint32_t stride, int32_t numSamples );
|
|
void copyPredictorTo24Shift( int32_t * in, uint16_t * shift, uint8_t * out, uint32_t stride, int32_t numSamples, int32_t bytesShifted );
|
|
void copyPredictorTo20( int32_t * in, uint8_t * out, uint32_t stride, int32_t numSamples );
|
|
|
|
void copyPredictorTo32( int32_t * in, int32_t * out, uint32_t stride, int32_t numSamples );
|
|
void copyPredictorTo32Shift( int32_t * in, uint16_t * shift, int32_t * out, uint32_t stride, int32_t numSamples, int32_t bytesShifted );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __MATRIXLIB_H */
|