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 <media/stagefright/omx/SimpleSoftOMXComponent.h> 22 23 #include "FLAC/stream_encoder.h" 24 25 namespace android { 26 27 struct SoftFlacEncoder : public SimpleSoftOMXComponent { 28 SoftFlacEncoder(const char *name, 29 const OMX_CALLBACKTYPE *callbacks, 30 OMX_PTR appData, 31 OMX_COMPONENTTYPE **component); 32 33 virtual OMX_ERRORTYPE initCheck() const; 34 35 protected: 36 virtual ~SoftFlacEncoder(); 37 38 virtual OMX_ERRORTYPE internalGetParameter( 39 OMX_INDEXTYPE index, OMX_PTR params); 40 41 virtual OMX_ERRORTYPE internalSetParameter( 42 OMX_INDEXTYPE index, const OMX_PTR params); 43 44 virtual void onQueueFilled(OMX_U32 portIndex); 45 46 private: 47 const unsigned int kNumBuffers = 2; 48 static constexpr unsigned int kMaxChannels = 2; 49 static constexpr unsigned int kNumSamplesPerFrame = 1152; 50 static constexpr unsigned int kMaxInputBufferSize = 51 kNumSamplesPerFrame * kMaxChannels * sizeof(float); 52 const unsigned int kMaxOutputBufferSize = 65536; //TODO check if this can be reduced 53 54 bool mSignalledError; 55 56 OMX_U32 mNumChannels; 57 OMX_U32 mSampleRate; 58 OMX_U32 mCompressionLevel; 59 OMX_NUMERICALDATATYPE mNumericalData = OMX_NumericalDataSigned; 60 OMX_U32 mBitsPerSample = 16; 61 62 // should the data received by the callback be written to the output port 63 bool mEncoderWriteData; 64 bool mEncoderReturnedEncodedData; 65 bool mSawInputEOS; 66 bool mSentOutputEOS; 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 unsigned mHeaderOffset; 91 bool mHeaderComplete; 92 bool mWroteHeader; 93 char mHeader[128]; 94 95 DISALLOW_EVIL_CONSTRUCTORS(SoftFlacEncoder); 96 }; 97 98 } // namespace android 99 100 #endif // SOFT_FLAC_ENC_H_ 101 102