| /* |
| * 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 */ |