1 /* 2 * Copyright (C) 2011 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 18 #include <stdint.h> 19 #include <media/stagefright/MediaSource.h> 20 #include <media/AudioBufferProvider.h> 21 #include "AudioResampler.h" 22 23 namespace android { 24 25 struct MediaBuffer; 26 27 class VideoEditorSRC : public MediaSource , public AudioBufferProvider { 28 29 public: 30 VideoEditorSRC(const sp<MediaSource> &source); 31 32 virtual status_t start (MetaData *params = NULL); 33 virtual status_t stop(); 34 virtual sp<MetaData> getFormat(); 35 virtual status_t read ( 36 MediaBuffer **buffer, const ReadOptions *options = NULL); 37 38 virtual status_t getNextBuffer(Buffer* buffer, int64_t pts); 39 virtual void releaseBuffer(Buffer* buffer); 40 41 // Sampling freqencies 42 enum { 43 kFreq8000Hz = 8000, 44 kFreq11025Hz = 11025, 45 kFreq12000Hz = 12000, 46 kFreq16000Hz = 16000, 47 kFreq22050Hz = 22050, 48 kFreq24000Hz = 24000, 49 kFreq32000Hz = 32000, 50 kFreq44100Hz = 44100, 51 kFreq48000Hz = 48000, 52 }; 53 54 protected : 55 virtual ~VideoEditorSRC(); 56 57 private: 58 AudioResampler *mResampler; 59 sp<MediaSource> mSource; 60 int mChannelCnt; 61 int mSampleRate; 62 int32_t mOutputSampleRate; 63 bool mStarted; 64 sp<MetaData> mOutputFormat; 65 66 MediaBuffer* mBuffer; 67 int32_t mLeftover; 68 bool mFormatChanged; 69 bool mStopPending; 70 71 int64_t mInitialTimeStampUs; 72 int64_t mAccuOutBufferSize; 73 74 int64_t mSeekTimeUs; 75 ReadOptions::SeekMode mSeekMode; 76 77 VideoEditorSRC(); 78 void checkAndSetResampler(); 79 80 // Don't call me 81 VideoEditorSRC(const VideoEditorSRC&); 82 VideoEditorSRC &operator=(const VideoEditorSRC &); 83 84 }; 85 86 } //namespce android 87 88