chromium/components/mirroring/service/rtp_stream.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_MIRRORING_SERVICE_RTP_STREAM_H_
#define COMPONENTS_MIRRORING_SERVICE_RTP_STREAM_H_

#include <memory>
#include <string>

#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "media/base/audio_bus.h"
#include "media/cast/cast_config.h"
#include "media/cast/constants.h"
#include "media/video/video_encode_accelerator.h"

namespace media {

class VideoFrame;

namespace cast {
class VideoSender;
class AudioSender;
}  // namespace cast

}  // namespace media

namespace mirroring {

class COMPONENT_EXPORT(MIRRORING_SERVICE) RtpStreamClient { … };

// Receives video frames and submits the data to media::cast::VideoSender. It
// also includes a timer to request refresh frames when the source halts (e.g.,
// a screen capturer stops delivering frames because the screen is not being
// updated). When a halt is detected, refresh frames will be requested at
// intervals `refresh_interval` apart for a short period of time. This provides
// the video encoder, downstream, several copies of the last frame so that it
// may clear up lossy encoding artifacts.
//
// Note that this mostly calls through to the media::cast::VideoSender, and the
// refresh frame logic could be factored out into a separate object.
// TODO(issues.chromium.org/329781397): Remove unnecessary wrapper objects in
// Chrome's implementation of the Cast sender.
class COMPONENT_EXPORT(MIRRORING_SERVICE) VideoRtpStream final { … };

// Receives audio data and submits the data to media::cast::AudioSender.
// Note that this mostly calls through to the media::cast::VideoSender, and the
// refresh frame logic could be factored out into a separate object.
//
// NOTE: This is a do-nothing wrapper over the underlying AudioSender.
// TODO(issues.chromium.org/329781397): Remove unnecessary wrapper objects in
// Chrome's implementation of the Cast sender.
class COMPONENT_EXPORT(MIRRORING_SERVICE) AudioRtpStream final { … };

}  // namespace mirroring

#endif  // COMPONENTS_MIRRORING_SERVICE_RTP_STREAM_H_