NuPlayerSource.h revision 9575c96b6e418914e2ffc6741ecc8d71e3968dbe
1/* 2 * Copyright (C) 2010 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 NUPLAYER_SOURCE_H_ 18 19#define NUPLAYER_SOURCE_H_ 20 21#include "NuPlayer.h" 22 23#include <media/stagefright/foundation/AMessage.h> 24 25namespace android { 26 27struct ABuffer; 28struct MetaData; 29 30struct NuPlayer::Source : public AHandler { 31 enum Flags { 32 FLAG_CAN_PAUSE = 1, 33 FLAG_CAN_SEEK_BACKWARD = 2, // the "10 sec back button" 34 FLAG_CAN_SEEK_FORWARD = 4, // the "10 sec forward button" 35 FLAG_CAN_SEEK = 8, // the "seek bar" 36 FLAG_DYNAMIC_DURATION = 16, 37 }; 38 39 enum { 40 kWhatPrepared, 41 kWhatFlagsChanged, 42 kWhatVideoSizeChanged, 43 }; 44 45 // The provides message is used to notify the player about various 46 // events. 47 Source(const sp<AMessage> ¬ify) 48 : mNotify(notify) { 49 } 50 51 virtual void prepareAsync() = 0; 52 53 virtual void start() = 0; 54 virtual void stop() {} 55 56 // Returns OK iff more data was available, 57 // an error or ERROR_END_OF_STREAM if not. 58 virtual status_t feedMoreTSData() = 0; 59 60 virtual sp<AMessage> getFormat(bool audio); 61 62 virtual status_t dequeueAccessUnit( 63 bool audio, sp<ABuffer> *accessUnit) = 0; 64 65 virtual status_t getDuration(int64_t *durationUs) { 66 return INVALID_OPERATION; 67 } 68 69 virtual status_t seekTo(int64_t seekTimeUs) { 70 return INVALID_OPERATION; 71 } 72 73protected: 74 virtual ~Source() {} 75 76 virtual void onMessageReceived(const sp<AMessage> &msg); 77 78 virtual sp<MetaData> getFormatMeta(bool audio) { return NULL; } 79 80 sp<AMessage> dupNotify() const { return mNotify->dup(); } 81 82 void notifyFlagsChanged(uint32_t flags); 83 void notifyVideoSizeChanged(int32_t width, int32_t height); 84 void notifyPrepared(); 85 86private: 87 sp<AMessage> mNotify; 88 89 DISALLOW_EVIL_CONSTRUCTORS(Source); 90}; 91 92} // namespace android 93 94#endif // NUPLAYER_SOURCE_H_ 95 96