1 /* 2 * Copyright (C) 2007 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 ANDROID_AUDIO_BUFFER_PROVIDER_H 18 #define ANDROID_AUDIO_BUFFER_PROVIDER_H 19 20 #include <utils/Errors.h> 21 22 namespace android { 23 // ---------------------------------------------------------------------------- 24 25 class AudioBufferProvider 26 { 27 public: 28 29 struct Buffer { 30 Buffer() : raw(NULL), frameCount(0) { } 31 union { 32 void* raw; 33 short* i16; 34 int8_t* i8; 35 }; 36 size_t frameCount; 37 }; 38 39 virtual ~AudioBufferProvider() {} 40 41 // value representing an invalid presentation timestamp 42 static const int64_t kInvalidPTS = 0x7FFFFFFFFFFFFFFFLL; // <stdint.h> is too painful 43 44 // pts is the local time when the next sample yielded by getNextBuffer 45 // will be rendered. 46 // Pass kInvalidPTS if the PTS is unknown or not applicable. 47 virtual status_t getNextBuffer(Buffer* buffer, int64_t pts = kInvalidPTS) = 0; 48 49 virtual void releaseBuffer(Buffer* buffer) = 0; 50 }; 51 52 // ---------------------------------------------------------------------------- 53 }; // namespace android 54 55 #endif // ANDROID_AUDIO_BUFFER_PROVIDER_H 56
