VideoEditorSRC.h revision eb5b265274bb26732ac9f4ac2d42d0b7e4148d52
1/* 2 * Copyright (C) 2011 NXP Software 3 * Copyright (C) 2011 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18#include <stdint.h> 19 20#include <utils/RefBase.h> 21#include <media/stagefright/MediaErrors.h> 22 23#include <media/stagefright/MediaSource.h> 24#include <media/stagefright/MediaBuffer.h> 25#include <media/stagefright/MediaBufferGroup.h> 26#include <media/stagefright/MediaDefs.h> 27 28#include "AudioBufferProvider.h" 29#include "AudioResampler.h" 30 31namespace android { 32//struct MediaSource; 33 34 35class VideoEditorSRC : public MediaSource , public AudioBufferProvider { 36 37 public: 38 VideoEditorSRC( 39 const sp<MediaSource> &source); 40 41 virtual status_t start (MetaData *params = NULL); 42 virtual status_t stop(); 43 virtual sp<MetaData> getFormat(); 44 virtual status_t read ( 45 MediaBuffer **buffer, const ReadOptions *options = NULL); 46 47 virtual status_t getNextBuffer(Buffer* buffer); 48 virtual void releaseBuffer(Buffer* buffer); 49 50 void setResampling(int32_t sampleRate=kFreq32000Hz); 51 52 enum { //Sampling freq 53 kFreq8000Hz = 8000, 54 kFreq11025Hz = 11025, 55 kFreq12000Hz = 12000, 56 kFreq16000Hz = 16000, 57 kFreq22050Hz = 22050, 58 kFreq240000Hz = 24000, 59 kFreq32000Hz = 32000, 60 kFreq44100 = 44100, 61 kFreq48000 = 48000, 62 }; 63 64 static const uint16_t UNITY_GAIN = 0x1000; 65 static const int32_t DEFAULT_SAMPLING_FREQ = (int32_t)kFreq32000Hz; // kFreq44100; 66 67 protected : 68 virtual ~VideoEditorSRC(); 69 private: 70 71 VideoEditorSRC(); 72 VideoEditorSRC &operator=(const VideoEditorSRC &); 73 74 AudioResampler *mResampler; 75 AudioBufferProvider *mbufferProvider; 76 sp<MediaSource> mSource; 77 MediaBuffer *mCopyBuffer; 78 MediaBufferGroup *mGroup; 79 uint8_t *mInputByteBuffer; 80 int32_t mInputBufferLength; 81 int mInputFrameSize; 82 int mBitDepth; 83 int mChannelCnt; 84 int mSampleRate; 85 int32_t mOutputSampleRate; 86 bool mStarted; 87 bool mIsResamplingRequired; 88 bool mIsChannelConvertionRequired; // for mono to stereo 89 sp<MetaData> mOutputFormat; 90 Mutex mLock; 91 int32_t *pTmpBuffer; 92 93 uint8_t* pInterframeBuffer; 94 int32_t mInterframeBufferPosition; 95 int32_t mLeftover; 96 int32_t mLastReadSize ; 97 98 int64_t mInitialTimeStampUs; 99 int64_t mAccuOutBufferSize; 100 101 int64_t mSeekTimeUs; 102 ReadOptions::SeekMode mSeekMode; 103 104}; 105 106} //namespce android 107 108