SourceAudioBufferProvider.h revision 2dd4bdd715f586d4d30cf90cc6fc2bbfbce60fe0
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 25namespace android { 26 27class SourceAudioBufferProvider : public ExtendedAudioBufferProvider { 28 29public: 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 40private: 41 const sp<NBAIO_Source> mSource; // the wrapped source 42 /*const*/ size_t mFrameBitShift; // log2(frame size in bytes) 43 void* mAllocated; // pointer to base of allocated memory 44 size_t mSize; // size of mAllocated in frames 45 size_t mOffset; // frame offset within mAllocated of valid data 46 size_t mRemaining; // frame count within mAllocated of valid data 47 size_t mGetCount; // buffer.frameCount of the most recent getNextBuffer 48}; 49 50} // namespace android 51 52#endif // ANDROID_SOURCE_AUDIO_BUFFER_PROVIDER_H 53