62 lines
1.6 KiB
C
62 lines
1.6 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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#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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