1/* 2 * Copyright 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 CONVERTER_H_ 18 19#define CONVERTER_H_ 20 21#include "WifiDisplaySource.h" 22 23#include <media/stagefright/foundation/AHandler.h> 24 25namespace android { 26 27struct ABuffer; 28struct MediaCodec; 29 30#define ENABLE_SILENCE_DETECTION 0 31 32// Utility class that receives media access units and converts them into 33// media access unit of a different format. 34// Right now this'll convert raw video into H.264 and raw audio into AAC. 35struct Converter : public AHandler { 36 Converter( 37 const sp<AMessage> ¬ify, 38 const sp<ALooper> &codecLooper, 39 const sp<AMessage> &format, 40 bool usePCMAudio); 41 42 status_t initCheck() const; 43 44 size_t getInputBufferCount() const; 45 46 sp<AMessage> getOutputFormat() const; 47 48 void feedAccessUnit(const sp<ABuffer> &accessUnit); 49 void signalEOS(); 50 51 void requestIDRFrame(); 52 53 enum { 54 kWhatAccessUnit, 55 kWhatEOS, 56 kWhatError, 57 }; 58 59 enum { 60 kWhatDoMoreWork, 61 kWhatRequestIDRFrame, 62 kWhatShutdown, 63 kWhatMediaPullerNotify, 64 kWhatEncoderActivity, 65 }; 66 67 void shutdownAsync(); 68 69protected: 70 virtual ~Converter(); 71 virtual void onMessageReceived(const sp<AMessage> &msg); 72 73private: 74 status_t mInitCheck; 75 sp<AMessage> mNotify; 76 sp<ALooper> mCodecLooper; 77 sp<AMessage> mInputFormat; 78 bool mIsVideo; 79 bool mIsPCMAudio; 80 sp<AMessage> mOutputFormat; 81 82 sp<MediaCodec> mEncoder; 83 sp<AMessage> mEncoderActivityNotify; 84 85 Vector<sp<ABuffer> > mEncoderInputBuffers; 86 Vector<sp<ABuffer> > mEncoderOutputBuffers; 87 88 List<size_t> mAvailEncoderInputIndices; 89 90 List<sp<ABuffer> > mInputBufferQueue; 91 92 bool mDoMoreWorkPending; 93 94#if ENABLE_SILENCE_DETECTION 95 int64_t mFirstSilentFrameUs; 96 bool mInSilentMode; 97#endif 98 99 sp<ABuffer> mPartialAudioAU; 100 101 status_t initEncoder(); 102 103 status_t feedEncoderInputBuffers(); 104 105 void scheduleDoMoreWork(); 106 status_t doMoreWork(); 107 108 void notifyError(status_t err); 109 110 // Packetizes raw PCM audio data available in mInputBufferQueue 111 // into a format suitable for transport stream inclusion and 112 // notifies the observer. 113 status_t feedRawAudioInputBuffers(); 114 115 static bool IsSilence(const sp<ABuffer> &accessUnit); 116 117 DISALLOW_EVIL_CONSTRUCTORS(Converter); 118}; 119 120} // namespace android 121 122#endif // CONVERTER_H_ 123