Index: webrtc/media/base/adaptedvideotracksource.h |
diff --git a/webrtc/media/base/adaptedvideotracksource.h b/webrtc/media/base/adaptedvideotracksource.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a8b3d8c87897342b6e854296ec75d225e6c7a0a2 |
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+++ b/webrtc/media/base/adaptedvideotracksource.h |
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+/* |
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
+ * |
+ * Use of this source code is governed by a BSD-style license |
+ * that can be found in the LICENSE file in the root of the source |
+ * tree. An additional intellectual property rights grant can be found |
+ * in the file PATENTS. All contributing project authors may |
+ * be found in the AUTHORS file in the root of the source tree. |
+ */ |
+ |
+#ifndef WEBRTC_MEDIA_BASE_ADAPTEDVIDEOTRACKSOURCE_H_ |
+#define WEBRTC_MEDIA_BASE_ADAPTEDVIDEOTRACKSOURCE_H_ |
+ |
+#include "webrtc/api/mediastreaminterface.h" |
+#include "webrtc/api/notifier.h" |
+#include "webrtc/media/base/videoadapter.h" |
+#include "webrtc/media/base/videobroadcaster.h" |
+ |
+namespace rtc { |
+ |
+// Base class for sources which needs video adaptation, e.g., video |
+// capture sources. Sinks must be added and removed on one and only |
+// one thread, while AdaptFrame and OnFrame may be called on any |
+// thread. |
+class AdaptedVideoTrackSource |
+ : public webrtc::Notifier<webrtc::VideoTrackSourceInterface> { |
+ public: |
+ AdaptedVideoTrackSource(); |
+ |
+ // Returns false if no stats are available, e.g, for a remote |
+ // source, or a source which has not seen its first frame yet. |
+ // Should avoid blocking. |
+ bool GetStats(Stats* stats) override; |
perkj_webrtc
2016/09/21 08:59:23
Also private?
|
+ |
+ protected: |
+ // Checks the apply_rotation_ flag. If the frame needs rotation, it |
+ // will be rotated if it is a plain memory frame, and discarded it |
+ // if it is a native frame. (Subclasses producing native frames must |
+ // handle apply_rotation_ themselves). |
+ void OnFrame(const cricket::VideoFrame& frame); |
+ |
+ // Reports the appropriate frame size after adaptation. Returns true |
+ // if a frame is wanted. Returns false if there are no interested |
+ // sinks, or if the VideoAdapter decides to drop the frame. |
+ bool AdaptFrame(int width, |
+ int height, |
+ int64_t time_us, |
+ int* out_width, |
+ int* out_height, |
+ int* crop_width, |
+ int* crop_height, |
+ int* crop_x, |
+ int* crop_y); |
+ |
+ // Returns the current value of the apply_rotation flag, derived |
+ // from the VideoSinkWants of registered sinks. Beware that when |
+ // using this method, the value may become stale before it is used. |
+ bool apply_rotation(); |
+ |
+ cricket::VideoAdapter* video_adapter() { return &video_adapter_; } |
+ |
+ private: |
+ // Implements rtc::VideoSourceInterface. |
+ void AddOrUpdateSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink, |
+ const rtc::VideoSinkWants& wants) override; |
+ void RemoveSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink) override; |
+ |
+ void OnSinkWantsChanged(const rtc::VideoSinkWants& wants); |
+ |
+ rtc::ThreadChecker thread_checker_; |
+ |
+ cricket::VideoAdapter video_adapter_; |
+ |
+ rtc::CriticalSection apply_rotation_crit_; |
+ bool apply_rotation_ GUARDED_BY(apply_rotation_crit_); |
+ |
+ rtc::CriticalSection stats_crit_; |
+ rtc::Optional<Stats> stats_ GUARDED_BY(stats_crit_); |
+ |
+ VideoBroadcaster broadcaster_; |
+}; |
+ |
+} // namespace rtc |
+ |
+#endif // WEBRTC_MEDIA_BASE_ADAPTEDVIDEOTRACKSOURCE_H_ |