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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 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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217 | 217 |
218 // Based on the spec in | 218 // Based on the spec in |
219 // https://w3c.github.io/webrtc-pc/#idl-def-rtcdegradationpreference. | 219 // https://w3c.github.io/webrtc-pc/#idl-def-rtcdegradationpreference. |
220 // These options are enforced on a best-effort basis. For instance, all of | 220 // These options are enforced on a best-effort basis. For instance, all of |
221 // these options may suffer some frame drops in order to avoid queuing. | 221 // these options may suffer some frame drops in order to avoid queuing. |
222 // TODO(sprang): Look into possibility of more strictly enforcing the | 222 // TODO(sprang): Look into possibility of more strictly enforcing the |
223 // maintain-framerate option. | 223 // maintain-framerate option. |
224 enum class DegradationPreference { | 224 enum class DegradationPreference { |
225 // Don't take any actions based on over-utilization signals. | 225 // Don't take any actions based on over-utilization signals. |
226 kDegradationDisabled, | 226 kDegradationDisabled, |
227 // On over-use, request lost resolution, possibly causing down-scaling. | 227 // On over-use, request lower frame rate, possibly causing frame drops. |
228 kMaintainResolution, | 228 kMaintainResolution, |
229 // On over-use, request lower frame rate, possible causing frame drops. | 229 // On over-use, request lower resolution, possibly causing down-scaling. |
230 kMaintainFramerate, | 230 kMaintainFramerate, |
231 // Try to strike a "pleasing" balance between frame rate or resolution. | 231 // Try to strike a "pleasing" balance between frame rate or resolution. |
232 kBalanced, | 232 kBalanced, |
233 }; | 233 }; |
234 | 234 |
235 virtual void SetSource( | 235 virtual void SetSource( |
236 rtc::VideoSourceInterface<webrtc::VideoFrame>* source, | 236 rtc::VideoSourceInterface<webrtc::VideoFrame>* source, |
237 const DegradationPreference& degradation_preference) = 0; | 237 const DegradationPreference& degradation_preference) = 0; |
238 | 238 |
239 // Set which streams to send. Must have at least as many SSRCs as configured | 239 // Set which streams to send. Must have at least as many SSRCs as configured |
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259 EnableEncodedFrameRecording(std::vector<rtc::PlatformFile>(), 0); | 259 EnableEncodedFrameRecording(std::vector<rtc::PlatformFile>(), 0); |
260 } | 260 } |
261 | 261 |
262 protected: | 262 protected: |
263 virtual ~VideoSendStream() {} | 263 virtual ~VideoSendStream() {} |
264 }; | 264 }; |
265 | 265 |
266 } // namespace webrtc | 266 } // namespace webrtc |
267 | 267 |
268 #endif // WEBRTC_VIDEO_SEND_STREAM_H_ | 268 #endif // WEBRTC_VIDEO_SEND_STREAM_H_ |
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