1 /* 2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MEDIA_BASE_DELAYABLE_H_ 12 #define MEDIA_BASE_DELAYABLE_H_ 13 14 #include <stdint.h> 15 16 #include "absl/types/optional.h" 17 18 namespace cricket { 19 20 // Delayable is used by user code through ApplyConstraints algorithm. Its 21 // methods must take precendence over similar functional in |syncable.h|. 22 class Delayable { 23 public: ~Delayable()24 virtual ~Delayable() {} 25 // Set base minimum delay of the receive stream with specified ssrc. 26 // Base minimum delay sets lower bound on minimum delay value which 27 // determines minimum delay until audio playout. 28 // Returns false if there is no stream with given ssrc. 29 virtual bool SetBaseMinimumPlayoutDelayMs(uint32_t ssrc, int delay_ms) = 0; 30 31 // Returns current value of base minimum delay in milliseconds. 32 virtual absl::optional<int> GetBaseMinimumPlayoutDelayMs( 33 uint32_t ssrc) const = 0; 34 }; 35 36 } // namespace cricket 37 38 #endif // MEDIA_BASE_DELAYABLE_H_ 39