66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
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/*
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* Copyright (c) 2011 Apple Inc. All rights reserved.
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*
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* @APPLE_APACHE_LICENSE_HEADER_START@
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @APPLE_APACHE_LICENSE_HEADER_END@
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*/
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/*
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File: ALACDecoder.h
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*/
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#ifndef _ALACDECODER_H
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#define _ALACDECODER_H
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#if PRAGMA_ONCE
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#pragma once
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#endif
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#include <stdint.h>
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#include "ALACAudioTypes.h"
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struct BitBuffer;
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class ALACDecoder
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{
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public:
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ALACDecoder();
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~ALACDecoder();
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int32_t Init( void * inMagicCookie, uint32_t inMagicCookieSize );
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int32_t Decode( struct BitBuffer * bits, uint8_t * sampleBuffer, uint32_t numSamples, uint32_t numChannels, uint32_t * outNumSamples );
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public:
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// decoding parameters (public for use in the analyzer)
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ALACSpecificConfig mConfig;
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protected:
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int32_t FillElement( struct BitBuffer * bits );
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int32_t DataStreamElement( struct BitBuffer * bits );
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uint16_t mActiveElements;
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// decoding buffers
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int32_t * mMixBufferU;
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int32_t * mMixBufferV;
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int32_t * mPredictor;
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uint16_t * mShiftBuffer; // note: this points to mPredictor's memory but different
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// variable for clarity and type difference
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};
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#endif /* _ALACDECODER_H */
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