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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MOJO_MEDIA_MODELS_DEMAND_H_ | 5 #ifndef MOJO_MEDIA_MODELS_DEMAND_H_ |
6 #define MOJO_MEDIA_MODELS_DEMAND_H_ | 6 #define MOJO_MEDIA_MODELS_DEMAND_H_ |
7 | 7 |
8 namespace mojo { | 8 namespace mojo { |
9 namespace media { | 9 namespace media { |
10 | 10 |
11 // Expresses packet demand for signalling upstream in a graph. | 11 // Expresses packet demand for signalling upstream in a graph. |
12 enum class Demand { | 12 enum class Demand { |
13 // Ordered such that (kNegative < kNeutral < kPositive). | 13 // Ordered such that (kNegative < kNeutral < kPositive). |
14 | 14 |
15 // No packet can currently be accepted. | 15 // No packet can currently be accepted. |
16 kNegative = -1, | 16 kNegative = -1, |
17 | 17 |
18 // A packet can be accepted but is not required to meet timing constraints. | 18 // A packet can be accepted but is not required to meet timing constraints. |
19 kNeutral = 0, | 19 kNeutral = 0, |
20 | 20 |
21 // A packet is required to meet timing constraints. | 21 // A packet is required to meet timing constraints. |
22 kPositive = 1 | 22 kPositive = 1 |
23 }; | 23 }; |
24 | 24 |
25 } // namespace media | 25 } // namespace media |
26 } // namespace mojo | 26 } // namespace mojo |
27 | 27 |
28 #endif // MOJO_MEDIA_MODELS_DEMAND_H_ | 28 #endif // MOJO_MEDIA_MODELS_DEMAND_H_ |
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