| Chih-Chung Chang | 9969866 | 2011-06-30 14:21:38 +0800 | [diff] [blame^] | 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 | #include <stdint.h> |
| 18 | |
| 19 | #include <utils/RefBase.h> |
| 20 | #include <utils/threads.h> |
| 21 | |
| 22 | #include <media/stagefright/MediaSource.h> |
| 23 | |
| 24 | #include "AudioBufferProvider.h" |
| 25 | #include "AudioResampler.h" |
| 26 | |
| 27 | namespace android { |
| 28 | |
| 29 | struct MediaBuffer; |
| 30 | |
| 31 | class VideoEditorSRC : public MediaSource , public AudioBufferProvider { |
| 32 | |
| 33 | public: |
| 34 | VideoEditorSRC( |
| 35 | const sp<MediaSource> &source); |
| 36 | |
| 37 | virtual status_t start (MetaData *params = NULL); |
| 38 | virtual status_t stop(); |
| 39 | virtual sp<MetaData> getFormat(); |
| 40 | virtual status_t read ( |
| 41 | MediaBuffer **buffer, const ReadOptions *options = NULL); |
| 42 | |
| 43 | virtual status_t getNextBuffer(Buffer* buffer); |
| 44 | virtual void releaseBuffer(Buffer* buffer); |
| 45 | |
| 46 | void setResampling(int32_t sampleRate=kFreq32000Hz); |
| 47 | |
| 48 | enum { //Sampling freq |
| 49 | kFreq8000Hz = 8000, |
| 50 | kFreq11025Hz = 11025, |
| 51 | kFreq12000Hz = 12000, |
| 52 | kFreq16000Hz = 16000, |
| 53 | kFreq22050Hz = 22050, |
| 54 | kFreq240000Hz = 24000, |
| 55 | kFreq32000Hz = 32000, |
| 56 | kFreq44100 = 44100, |
| 57 | kFreq48000 = 48000, |
| 58 | }; |
| 59 | |
| 60 | static const uint16_t UNITY_GAIN = 0x1000; |
| 61 | static const int32_t DEFAULT_SAMPLING_FREQ = (int32_t)kFreq32000Hz; // kFreq44100; |
| 62 | |
| 63 | protected : |
| 64 | virtual ~VideoEditorSRC(); |
| 65 | private: |
| 66 | |
| 67 | VideoEditorSRC(); |
| 68 | VideoEditorSRC &operator=(const VideoEditorSRC &); |
| 69 | |
| 70 | AudioResampler *mResampler; |
| 71 | sp<MediaSource> mSource; |
| 72 | MediaBuffer *mCopyBuffer; |
| 73 | int mBitDepth; |
| 74 | int mChannelCnt; |
| 75 | int mSampleRate; |
| 76 | int32_t mOutputSampleRate; |
| 77 | bool mStarted; |
| 78 | bool mIsResamplingRequired; |
| 79 | bool mIsChannelConvertionRequired; // for mono to stereo |
| 80 | sp<MetaData> mOutputFormat; |
| 81 | Mutex mLock; |
| 82 | |
| 83 | uint8_t* mInterframeBuffer; |
| 84 | int32_t mInterframeBufferPosition; |
| 85 | int32_t mLeftover; |
| 86 | int32_t mLastReadSize ; |
| 87 | |
| 88 | int64_t mInitialTimeStampUs; |
| 89 | int64_t mAccuOutBufferSize; |
| 90 | |
| 91 | int64_t mSeekTimeUs; |
| 92 | ReadOptions::SeekMode mSeekMode; |
| 93 | int16_t *mReSampledBuffer; |
| 94 | |
| 95 | }; |
| 96 | |
| 97 | } //namespce android |
| 98 | |