starboard/android/shared/video_render_algorithm.h

// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef STARBOARD_ANDROID_SHARED_VIDEO_RENDER_ALGORITHM_H_
#define STARBOARD_ANDROID_SHARED_VIDEO_RENDER_ALGORITHM_H_

#include <list>

#include "starboard/android/shared/jni_env_ext.h"
#include "starboard/android/shared/video_decoder.h"
#include "starboard/shared/starboard/player/filter/video_render_algorithm.h"

namespace starboard {
namespace android {
namespace shared {

class VideoRenderAlgorithm : public ::starboard::shared::starboard::player::
                                 filter::VideoRenderAlgorithm {
 public:
  VideoRenderAlgorithm(VideoDecoder* video_decoder,
                       VideoFrameTracker* frame_tracker);

  void Render(MediaTimeProvider* media_time_provider,
              std::list<scoped_refptr<VideoFrame>>* frames,
              VideoRendererSink::DrawFrameCB draw_frame_cb) override;
  void Seek(int64_t seek_to_time) override;
  int GetDroppedFrames() override;

 private:
  class VideoFrameReleaseTimeHelper {
   public:
    VideoFrameReleaseTimeHelper();
    ~VideoFrameReleaseTimeHelper();
    jlong AdjustReleaseTime(jlong frame_presentation_time_us,
                            jlong unadjusted_release_time_ns,
                            double playback_rate);

   private:
    jobject j_video_frame_release_time_helper_ = nullptr;
  };

  VideoDecoder* video_decoder_ = nullptr;
  VideoFrameTracker* frame_tracker_;
  double playback_rate_ = 1.0;
  VideoFrameReleaseTimeHelper video_frame_release_time_helper_;
  int dropped_frames_ = 0;
};

}  // namespace shared
}  // namespace android
}  // namespace starboard

#endif  // STARBOARD_ANDROID_SHARED_VIDEO_RENDER_ALGORITHM_H_