1 /* 2 * Copyright 2015 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_AV_SYNC_SETTINGS_H 18 #define ANDROID_AV_SYNC_SETTINGS_H 19 20 namespace android { 21 22 enum AVSyncSource : unsigned { 23 // let the system decide the best sync source 24 AVSYNC_SOURCE_DEFAULT = 0, 25 // sync to the system clock 26 AVSYNC_SOURCE_SYSTEM_CLOCK = 1, 27 // sync to the audio track 28 AVSYNC_SOURCE_AUDIO = 2, 29 // sync to the display vsync 30 AVSYNC_SOURCE_VSYNC = 3, 31 AVSYNC_SOURCE_MAX, 32 }; 33 34 enum AVSyncAudioAdjustMode : unsigned { 35 // let the system decide the best audio adjust mode 36 AVSYNC_AUDIO_ADJUST_MODE_DEFAULT = 0, 37 // adjust audio by time stretching 38 AVSYNC_AUDIO_ADJUST_MODE_STRETCH = 1, 39 // adjust audio by resampling 40 AVSYNC_AUDIO_ADJUST_MODE_RESAMPLE = 2, 41 AVSYNC_AUDIO_ADJUST_MODE_MAX, 42 }; 43 44 // max tolerance when adjusting playback speed to desired playback speed 45 #define AVSYNC_TOLERANCE_MAX 1.0f 46 47 struct AVSyncSettings { 48 AVSyncSource mSource; 49 AVSyncAudioAdjustMode mAudioAdjustMode; 50 float mTolerance; 51 AVSyncSettings() 52 : mSource(AVSYNC_SOURCE_DEFAULT), 53 mAudioAdjustMode(AVSYNC_AUDIO_ADJUST_MODE_DEFAULT), 54 mTolerance(.044f) { } 55 }; 56 57 } // namespace android 58 59 // --------------------------------------------------------------------------- 60 61 #endif // ANDROID_AV_SYNC_SETTINGS_H 62
