mirror of
https://github.com/TorqueGameEngines/Torque3D.git
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93 lines
2.9 KiB
C
93 lines
2.9 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: ALACEncoder.h
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*/
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#pragma once
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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 ALACEncoder
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{
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public :
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ALACEncoder () ;
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virtual ~ALACEncoder () ;
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virtual int32_t Encode (AudioFormatDescription theInputFormat, AudioFormatDescription theOutputFormat,
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unsigned char * theReadBuffer, unsigned char * theWriteBuffer, int32_t * ioNumBytes) ;
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virtual int32_t Finish () ;
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void SetFastMode (bool fast) { mFastMode = fast ; } ;
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// this must be called *before* InitializeEncoder ()
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void SetFrameSize (uint32_t frameSize) { mFrameSize = frameSize ; } ;
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void GetConfig (ALACSpecificConfig & config) ;
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uint32_t GetMagicCookieSize (uint32_t inNumChannels) ;
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void GetMagicCookie (void * config, uint32_t * ioSize) ;
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virtual int32_t InitializeEncoder (AudioFormatDescription theOutputFormat) ;
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protected :
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virtual void GetSourceFormat (const AudioFormatDescription * source, AudioFormatDescription * output) ;
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int32_t EncodeStereo (struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples) ;
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int32_t EncodeStereoFast (struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples) ;
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int32_t EncodeStereoEscape (struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t numSamples) ;
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int32_t EncodeMono (struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples) ;
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// ALAC encoder parameters
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int16_t mBitDepth ;
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bool mFastMode ;
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// encoding state
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int16_t mLastMixRes [kALACMaxChannels] ;
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// encoding buffers
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int32_t * mMixBufferU ;
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int32_t * mMixBufferV ;
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int32_t * mPredictorU ;
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int32_t * mPredictorV ;
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uint16_t * mShiftBufferUV ;
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uint8_t * mWorkBuffer ;
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// per-channel coefficients buffers
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int16_t mCoefsU [kALACMaxChannels][kALACMaxSearches][kALACMaxCoefs] ;
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int16_t mCoefsV [kALACMaxChannels][kALACMaxSearches][kALACMaxCoefs] ;
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// encoding statistics
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uint32_t mTotalBytesGenerated ;
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uint32_t mAvgBitRate ;
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uint32_t mMaxFrameBytes ;
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uint32_t mFrameSize ;
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uint32_t mMaxOutputBytes ;
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uint32_t mNumChannels ;
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uint32_t mOutputSampleRate ;
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} ;
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