1 /* 2 * Copyright (C) 2009 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 AUDIO_SOURCE_H_ 18 19 #define AUDIO_SOURCE_H_ 20 21 #include <media/AudioSystem.h> 22 #include <media/stagefright/MediaSource.h> 23 24 namespace android { 25 26 class AudioRecord; 27 struct MediaBufferGroup; 28 29 struct AudioSource : public MediaSource { 30 // Note that the "channels" parameter is _not_ the number of channels, 31 // but a bitmask of AudioSystem::audio_channels constants. 32 AudioSource( 33 int inputSource, uint32_t sampleRate, 34 uint32_t channels = AudioSystem::CHANNEL_IN_MONO); 35 36 status_t initCheck() const; 37 38 virtual status_t start(MetaData *params = NULL); 39 virtual status_t stop(); 40 virtual sp<MetaData> getFormat(); 41 42 virtual status_t read( 43 MediaBuffer **buffer, const ReadOptions *options = NULL); 44 45 protected: 46 virtual ~AudioSource(); 47 48 private: 49 enum { kMaxBufferSize = 8192 }; 50 51 AudioRecord *mRecord; 52 status_t mInitCheck; 53 bool mStarted; 54 MediaBufferGroup *mGroup; 55 56 AudioSource(const AudioSource &); 57 AudioSource &operator=(const AudioSource &); 58 }; 59 60 } // namespace android 61 62 #endif // AUDIO_SOURCE_H_ 63
