1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef SOFT_FLAC_ENC_H_ 18 19#define SOFT_FLAC_ENC_H_ 20 21#include "SimpleSoftOMXComponent.h" 22 23#include "FLAC/stream_encoder.h" 24 25// use this symbol to have the first output buffer start with FLAC frame header so a dump of 26// all the output buffers can be opened as a .flac file 27//#define WRITE_FLAC_HEADER_IN_FIRST_BUFFER 28 29namespace android { 30 31struct SoftFlacEncoder : public SimpleSoftOMXComponent { 32 SoftFlacEncoder(const char *name, 33 const OMX_CALLBACKTYPE *callbacks, 34 OMX_PTR appData, 35 OMX_COMPONENTTYPE **component); 36 37 virtual OMX_ERRORTYPE initCheck() const; 38 39protected: 40 virtual ~SoftFlacEncoder(); 41 42 virtual OMX_ERRORTYPE internalGetParameter( 43 OMX_INDEXTYPE index, OMX_PTR params); 44 45 virtual OMX_ERRORTYPE internalSetParameter( 46 OMX_INDEXTYPE index, const OMX_PTR params); 47 48 virtual void onQueueFilled(OMX_U32 portIndex); 49 50private: 51 52 enum { 53 kNumBuffers = 2, 54 kMaxNumSamplesPerFrame = 1152, 55 kMaxOutputBufferSize = 65536, //TODO check if this can be reduced 56 }; 57 58 bool mSignalledError; 59 60 OMX_U32 mNumChannels; 61 OMX_U32 mSampleRate; 62 OMX_U32 mCompressionLevel; 63 64 // should the data received by the callback be written to the output port 65 bool mEncoderWriteData; 66 bool mEncoderReturnedEncodedData; 67 size_t mEncoderReturnedNbBytes; 68 OMX_TICKS mCurrentInputTimeStamp; 69 70 FLAC__StreamEncoder* mFlacStreamEncoder; 71 72 void initPorts(); 73 74 OMX_ERRORTYPE configureEncoder(); 75 76 // FLAC encoder callbacks 77 // maps to encoderEncodeFlac() 78 static FLAC__StreamEncoderWriteStatus flacEncoderWriteCallback( 79 const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], 80 size_t bytes, unsigned samples, unsigned current_frame, void *client_data); 81 82 FLAC__StreamEncoderWriteStatus onEncodedFlacAvailable( 83 const FLAC__byte buffer[], 84 size_t bytes, unsigned samples, unsigned current_frame); 85 86 // FLAC takes samples aligned on 32bit boundaries, use this buffer for the conversion 87 // before passing the input data to the encoder 88 FLAC__int32* mInputBufferPcm32; 89 90#ifdef WRITE_FLAC_HEADER_IN_FIRST_BUFFER 91 unsigned mHeaderOffset; 92 bool mWroteHeader; 93 char mHeader[128]; 94#endif 95 96 DISALLOW_EVIL_CONSTRUCTORS(SoftFlacEncoder); 97}; 98 99} // namespace android 100 101#endif // SOFT_FLAC_ENC_H_ 102 103