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/*
* 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: ALACDecoder.h
*/
#ifndef _ALACDECODER_H
#define _ALACDECODER_H
#if PRAGMA_ONCE
#pragma once
#endif
#ifdef _MSC_VER
#include <msstdint.h>
#else
#include <stdint.h>
#endif
#include "ALACAudioTypes.h"
struct BitBuffer;
class ALACDecoder
{
public:
ALACDecoder();
~ALACDecoder();
int32_t Init( void * inMagicCookie, uint32_t inMagicCookieSize );
int32_t Decode( struct BitBuffer * bits, uint8_t * sampleBuffer, uint32_t numSamples, uint32_t numChannels, uint32_t * outNumSamples );
public:
// decoding parameters (public for use in the analyzer)
ALACSpecificConfig mConfig;
protected:
int32_t FillElement( struct BitBuffer * bits );
int32_t DataStreamElement( struct BitBuffer * bits );
uint16_t mActiveElements;
// decoding buffers
int32_t * mMixBufferU;
int32_t * mMixBufferV;
int32_t * mPredictor;
uint16_t * mShiftBuffer; // note: this points to mPredictor's memory but different
// variable for clarity and type difference
};
#endif /* _ALACDECODER_H */