061991fe60
it appears a one-character typo in the cmake_minimum_required line prevents it from compiling under CMake 4.0. in order to fix that, I had to take this thing out of submodules... it is recommended to do this after you pull; git submodule deinit extern/libsndfile
105 lines
3 KiB
C
105 lines
3 KiB
C
/*
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* Copyright (c) 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2012-2014 Erik de Castro Lopo <erikd@mega-nerd.com>
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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: alac_codec.h
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*/
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#ifndef ALAC_CODEC_H
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#define ALAC_CODEC_H
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#include <stdint.h>
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#include "ALACAudioTypes.h"
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#define ALAC_FRAME_LENGTH 4096
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struct BitBuffer ;
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typedef struct alac_decoder_s
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{
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// decoding parameters (public for use in the analyzer)
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ALACSpecificConfig mConfig ;
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uint16_t mActiveElements ;
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// decoding buffers
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int32_t mMixBufferU [ALAC_FRAME_LENGTH] ;
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int32_t mMixBufferV [ALAC_FRAME_LENGTH] ;
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union
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{
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int32_t mPredictor [ALAC_FRAME_LENGTH] ;
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uint16_t mShiftBuffer [ALAC_FRAME_LENGTH] ;
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} u ;
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uint32_t mNumChannels ;
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} ALAC_DECODER ;
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typedef struct alac_encoder_s
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{
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// ALAC encoder parameters
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int16_t mBitDepth ;
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// encoding state
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int16_t mLastMixRes [kALACMaxChannels] ;
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int32_t mFastMode ;
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// encoding buffers
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int32_t mMixBufferU [ALAC_FRAME_LENGTH] ;
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int32_t mMixBufferV [ALAC_FRAME_LENGTH] ;
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int32_t mPredictorU [ALAC_FRAME_LENGTH] ;
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int32_t mPredictorV [ALAC_FRAME_LENGTH] ;
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uint16_t mShiftBufferUV [2 * ALAC_FRAME_LENGTH] ;
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uint8_t mWorkBuffer [4 * ALAC_FRAME_LENGTH] ;
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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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} ALAC_ENCODER ;
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int32_t alac_decoder_init (ALAC_DECODER *p, void * inMagicCookie, uint32_t inMagicCookieSize) ;
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int32_t alac_encoder_init (ALAC_ENCODER *p, uint32_t samplerate, uint32_t channels, uint32_t format_flags, uint32_t frameSize) ;
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int32_t alac_decode (ALAC_DECODER *, struct BitBuffer * bits, int32_t * sampleBuffer,
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uint32_t numSamples, uint32_t * outNumSamples) ;
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int32_t alac_encode (ALAC_ENCODER *p, uint32_t numSamples,
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const int32_t * theReadBuffer, unsigned char * theWriteBuffer,
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uint32_t * ioNumBytes) ;
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void alac_set_fastmode (ALAC_ENCODER * p, int32_t fast) ;
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uint32_t alac_get_magic_cookie_size (uint32_t inNumChannels) ;
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void alac_get_magic_cookie (ALAC_ENCODER *p, void * config, uint32_t * ioSize) ;
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void alac_get_source_format (ALAC_ENCODER *p, const AudioFormatDescription * source, AudioFormatDescription * output) ;
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#endif
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