1 /* 2 * Copyright 2016 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_BUFFERING_SETTINGS_H 18 #define ANDROID_BUFFERING_SETTINGS_H 19 20 #include <binder/Parcelable.h> 21 22 namespace android { 23 24 enum BufferingMode : int { 25 // Do not support buffering. 26 BUFFERING_MODE_NONE = 0, 27 // Support only time based buffering. 28 BUFFERING_MODE_TIME_ONLY = 1, 29 // Support only size based buffering. 30 BUFFERING_MODE_SIZE_ONLY = 2, 31 // Support both time and size based buffering, time based calculation precedes size based. 32 // Size based calculation will be used only when time information is not available for 33 // the stream. 34 BUFFERING_MODE_TIME_THEN_SIZE = 3, 35 // Number of modes. 36 BUFFERING_MODE_COUNT = 4, 37 }; 38 39 struct BufferingSettings : public Parcelable { 40 static const int kNoWatermark = -1; 41 42 static bool IsValidBufferingMode(int mode); 43 static bool IsTimeBasedBufferingMode(int mode); 44 static bool IsSizeBasedBufferingMode(int mode); 45 46 BufferingMode mInitialBufferingMode; // for prepare 47 BufferingMode mRebufferingMode; // for playback 48 49 int mInitialWatermarkMs; // time based 50 int mInitialWatermarkKB; // size based 51 52 // When cached data is below this mark, playback will be paused for buffering 53 // till data reach |mRebufferingWatermarkHighMs| or end of stream. 54 int mRebufferingWatermarkLowMs; 55 // When cached data is above this mark, buffering will be paused. 56 int mRebufferingWatermarkHighMs; 57 58 // When cached data is below this mark, playback will be paused for buffering 59 // till data reach |mRebufferingWatermarkHighKB| or end of stream. 60 int mRebufferingWatermarkLowKB; 61 // When cached data is above this mark, buffering will be paused. 62 int mRebufferingWatermarkHighKB; 63 64 BufferingSettings(); 65 66 status_t writeToParcel(Parcel* parcel) const override; 67 status_t readFromParcel(const Parcel* parcel) override; 68 69 String8 toString() const; 70 }; 71 72 } // namespace android 73 74 // --------------------------------------------------------------------------- 75 76 #endif // ANDROID_BUFFERING_SETTINGS_H 77