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1 /* | 1 /* |
2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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41 | 41 |
42 static constexpr uint8_t kExperimentShift = 3; | 42 static constexpr uint8_t kExperimentShift = 3; |
43 static constexpr uint8_t kExperimentBitsSize = 3; | 43 static constexpr uint8_t kExperimentBitsSize = 3; |
44 static constexpr uint8_t kExperimentBitsMask = | 44 static constexpr uint8_t kExperimentBitsMask = |
45 ((1u << kExperimentBitsSize) - 1) << kExperimentShift; // 0b00111000 | 45 ((1u << kExperimentBitsSize) - 1) << kExperimentShift; // 0b00111000 |
46 | 46 |
47 static constexpr uint8_t kTotalBitsSize = | 47 static constexpr uint8_t kTotalBitsSize = |
48 kScreenshareBitsSize + kSimulcastBitsSize + kExperimentBitsSize; | 48 kScreenshareBitsSize + kSimulcastBitsSize + kExperimentBitsSize; |
49 } // namespace | 49 } // namespace |
50 | 50 |
51 bool SetExperimentId(VideoContentType* content_type, | 51 bool SetExperimentId(VideoContentType* content_type, uint8_t experiment_id) { |
52 uint8_t experiment_id) { | |
53 // Store in bits 2-4. | 52 // Store in bits 2-4. |
54 if (experiment_id >= (1 << kExperimentBitsSize)) | 53 if (experiment_id >= (1 << kExperimentBitsSize)) |
55 return false; | 54 return false; |
56 *content_type = static_cast<VideoContentType>( | 55 *content_type = static_cast<VideoContentType>( |
57 (static_cast<uint8_t>(*content_type) & ~kExperimentBitsMask) | | 56 (static_cast<uint8_t>(*content_type) & ~kExperimentBitsMask) | |
58 ((experiment_id << kExperimentShift) & kExperimentBitsMask)); | 57 ((experiment_id << kExperimentShift) & kExperimentBitsMask)); |
59 return true; | 58 return true; |
60 } | 59 } |
61 | 60 |
62 bool SetSimulcastId(VideoContentType* content_type, | 61 bool SetSimulcastId(VideoContentType* content_type, uint8_t simulcast_id) { |
63 uint8_t simulcast_id) { | |
64 // Store in bits 5-6. | 62 // Store in bits 5-6. |
65 if (simulcast_id >= (1 << kSimulcastBitsSize)) | 63 if (simulcast_id >= (1 << kSimulcastBitsSize)) |
66 return false; | 64 return false; |
67 *content_type = static_cast<VideoContentType>( | 65 *content_type = static_cast<VideoContentType>( |
68 (static_cast<uint8_t>(*content_type) & ~kSimulcastBitsMask) | | 66 (static_cast<uint8_t>(*content_type) & ~kSimulcastBitsMask) | |
69 ((simulcast_id << kSimulcastShift) & kSimulcastBitsMask)); | 67 ((simulcast_id << kSimulcastShift) & kSimulcastBitsMask)); |
70 return true; | 68 return true; |
71 } | 69 } |
72 | 70 |
73 uint8_t GetExperimentId( | 71 uint8_t GetExperimentId( |
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89 bool IsValidContentType(uint8_t value) { | 87 bool IsValidContentType(uint8_t value) { |
90 // Any 6-bit value is allowed. | 88 // Any 6-bit value is allowed. |
91 return value < (1 << kTotalBitsSize); | 89 return value < (1 << kTotalBitsSize); |
92 } | 90 } |
93 | 91 |
94 const char* ToString(const VideoContentType& content_type) { | 92 const char* ToString(const VideoContentType& content_type) { |
95 return IsScreenshare(content_type) ? "screen" : "realtime"; | 93 return IsScreenshare(content_type) ? "screen" : "realtime"; |
96 } | 94 } |
97 } // namespace videocontenttypehelpers | 95 } // namespace videocontenttypehelpers |
98 } // namespace webrtc | 96 } // namespace webrtc |
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