AndroidVideoTrackSource implementation

webrtc/api/androidvideotracksource.h

+/*
+ *  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_API_ANDROIDVIDEOTRACKSOURCE_H_
+#define WEBRTC_API_ANDROIDVIDEOTRACKSOURCE_H_
+
+#include "webrtc/api/android/jni/native_handle_impl.h"
+#include "webrtc/api/android/jni/surfacetexturehelper_jni.h"
+#include "webrtc/api/mediastreaminterface.h"
+#include "webrtc/api/notifier.h"
+#include "webrtc/base/asyncinvoker.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/base/thread_checker.h"
+#include "webrtc/base/timestampaligner.h"
+#include "webrtc/common_video/include/i420_buffer_pool.h"
+#include "webrtc/media/base/videoadapter.h"
+#include "webrtc/media/base/videobroadcaster.h"
+#include "webrtc/media/base/videosinkinterface.h"
+#include "third_party/libyuv/include/libyuv/convert.h"
+
+namespace webrtc {
+
+class AndroidVideoTrackSource : public Notifier<VideoTrackSourceInterface> {
+ public:
+  AndroidVideoTrackSource(rtc::Thread* signaling_thread,
+                          JNIEnv* jni,
+                          jobject j_egl_context);
+
+  // Not used on Android.
+  // TODO(sakal/magjed): Try to remove this from the interface.
+  void Stop() override { RTC_NOTREACHED(); };
+  // Not used on Android.
+  // TODO(sakal/magjed): Try to remove this from the interface.
+  void Restart() override { RTC_NOTREACHED(); }
+
+  // Currently, none of the Android implementations are screencast.
+  bool is_screencast() const override { return false; }
+
+  // Indicates that the encoder should denoise video before encoding it.
+  // If it is not set, the default configuration is used which is different
+  // depending on video codec.
+  rtc::Optional<bool> needs_denoising() const override {
+    return rtc::Optional<bool>(false);
+  }
+
+  // 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;
+
+  // Called by the native capture observer
+  void SetState(SourceState state);
+
+  SourceState state() const override { return state_; }
+
+  bool remote() const override { return false; }
+
+  void AddOrUpdateSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink,
+                       const rtc::VideoSinkWants& wants) override;
+  void RemoveSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink) override;
+
+  void OnByteBufferFrameCaptured(const void* frame_data,
+                                 int length,
+                                 int width,
+                                 int height,
+                                 int rotation,
+                                 int64_t timestamp_ns);
+
+  void OnTextureFrameCaptured(int width,
+                              int height,
+                              int rotation,
+                              int64_t timestamp_ns,
+                              const webrtc_jni::NativeHandleImpl& handle);
+
+  void OnOutputFormatRequest(int width, int height, int fps);
+
+  rtc::scoped_refptr<webrtc_jni::SurfaceTextureHelper>
+  surface_texture_helper() {
+    return surface_texture_helper_;
+  }
+
+ private:
+  rtc::Thread* signaling_thread_;
+  rtc::AsyncInvoker invoker_;
+  rtc::ThreadChecker worker_thread_checker_;
+  rtc::ThreadChecker camera_thread_checker_;
+  rtc::CriticalSection stats_crit_;
+  rtc::Optional<Stats> stats_ GUARDED_BY(stats_crit_);
+  SourceState state_;
+  rtc::VideoBroadcaster broadcaster_;
+  rtc::TimestampAligner timestamp_aligner_;
+  cricket::VideoAdapter video_adapter_;
+  rtc::CriticalSection apply_rotation_crit_;
+  bool apply_rotation_ GUARDED_BY(apply_rotation_crit_);
+  webrtc::I420BufferPool pre_scale_pool_;
+  webrtc::I420BufferPool post_scale_pool_;
+  rtc::scoped_refptr<webrtc_jni::SurfaceTextureHelper> surface_texture_helper_;
+
+  void OnFrame(const cricket::VideoFrame& frame, int width, int height);
+
+  void OnSinkWantsChanged(const rtc::VideoSinkWants& wants);
+
+  bool AdaptFrame(int width,
+                  int height,
+                  int64_t camera_time_us,
+                  int* out_width,
+                  int* out_height,
+                  int* crop_width,
+                  int* crop_height,
+                  int* crop_x,
+                  int* crop_y,
+                  int64_t* translated_camera_time_us);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_ANDROIDVIDEOTRACKSOURCE_H_