1 /* 2 * Copyright (C) 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 // Implementation of AudioBufferProvider that wraps an NBAIO_Source 18 19 #ifndef ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H 20 #define ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H 21 22 #include "NBAIO.h" 23 #include <media/ExtendedAudioBufferProvider.h> 24 25 namespace android { 26 27 class SourceAudioBufferProvider : public ExtendedAudioBufferProvider { 28 29 public: 30 SourceAudioBufferProvider(const sp<NBAIO_Source>& source); 31 virtual ~SourceAudioBufferProvider(); 32 33 // AudioBufferProvider interface 34 virtual status_t getNextBuffer(Buffer *buffer, int64_t pts); 35 virtual void releaseBuffer(Buffer *buffer); 36 37 // ExtendedAudioBufferProvider interface 38 virtual size_t framesReady() const; 39 virtual size_t framesReleased() const; 40 virtual void onTimestamp(const AudioTimestamp& timestamp); 41 42 private: 43 const sp<NBAIO_Source> mSource; // the wrapped source 44 /*const*/ size_t mFrameBitShift; // log2(frame size in bytes) 45 void* mAllocated; // pointer to base of allocated memory 46 size_t mSize; // size of mAllocated in frames 47 size_t mOffset; // frame offset within mAllocated of valid data 48 size_t mRemaining; // frame count within mAllocated of valid data 49 size_t mGetCount; // buffer.frameCount of the most recent getNextBuffer 50 uint32_t mFramesReleased; // counter of the total number of frames released 51 }; 52 53 } // namespace android 54 55 #endif // ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H 56
