mirror of
https://codeberg.org/ashley/poke.git
synced 2024-11-10 11:58:26 +01:00
92 lines
3 KiB
C++
92 lines
3 KiB
C++
/*
|
|
* 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: ALACEncoder.h
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "ALACAudioTypes.h"
|
|
|
|
|
|
struct BitBuffer;
|
|
|
|
class ALACEncoder
|
|
{
|
|
public:
|
|
ALACEncoder();
|
|
virtual ~ALACEncoder();
|
|
|
|
virtual int32_t Encode(AudioFormatDescription theInputFormat, AudioFormatDescription theOutputFormat,
|
|
unsigned char * theReadBuffer, unsigned char * theWriteBuffer, int32_t * ioNumBytes);
|
|
virtual int32_t Finish( );
|
|
|
|
void SetFastMode( bool fast ) { mFastMode = fast; };
|
|
|
|
// this must be called *before* InitializeEncoder()
|
|
void SetFrameSize( uint32_t frameSize ) { mFrameSize = frameSize; };
|
|
|
|
void GetConfig( ALACSpecificConfig & config );
|
|
uint32_t GetMagicCookieSize(uint32_t inNumChannels);
|
|
void GetMagicCookie( void * config, uint32_t * ioSize );
|
|
|
|
virtual int32_t InitializeEncoder(AudioFormatDescription theOutputFormat);
|
|
|
|
protected:
|
|
virtual void GetSourceFormat( const AudioFormatDescription * source, AudioFormatDescription * output );
|
|
|
|
int32_t EncodeStereo( struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples );
|
|
int32_t EncodeStereoFast( struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples );
|
|
int32_t EncodeStereoEscape( struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t numSamples );
|
|
int32_t EncodeMono( struct BitBuffer * bitstream, void * input, uint32_t stride, uint32_t channelIndex, uint32_t numSamples );
|
|
|
|
|
|
// ALAC encoder parameters
|
|
int16_t mBitDepth;
|
|
bool mFastMode;
|
|
|
|
// encoding state
|
|
int16_t mLastMixRes[kALACMaxChannels];
|
|
|
|
// encoding buffers
|
|
int32_t * mMixBufferU;
|
|
int32_t * mMixBufferV;
|
|
int32_t * mPredictorU;
|
|
int32_t * mPredictorV;
|
|
uint16_t * mShiftBufferUV;
|
|
|
|
uint8_t * mWorkBuffer;
|
|
|
|
// per-channel coefficients buffers
|
|
int16_t mCoefsU[kALACMaxChannels][kALACMaxSearches][kALACMaxCoefs];
|
|
int16_t mCoefsV[kALACMaxChannels][kALACMaxSearches][kALACMaxCoefs];
|
|
|
|
// encoding statistics
|
|
uint32_t mTotalBytesGenerated;
|
|
uint32_t mAvgBitRate;
|
|
uint32_t mMaxFrameBytes;
|
|
uint32_t mFrameSize;
|
|
uint32_t mMaxOutputBytes;
|
|
uint32_t mNumChannels;
|
|
uint32_t mOutputSampleRate;
|
|
};
|