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// 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.
#include "components/mirroring/service/rtp_stream.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/trace_event/trace_event.h"
#include "base/values.h"
#include "media/base/video_frame.h"
#include "media/cast/cast_config.h"
#include "media/cast/sender/audio_sender.h"
#include "media/cast/sender/video_sender.h"
namespace mirroring {
VideoRtpStream::VideoRtpStream(
std::unique_ptr<media::cast::VideoSender> video_sender,
base::WeakPtr<RtpStreamClient> client,
base::TimeDelta refresh_interval)
: video_sender_(std::move(video_sender)),
client_(client),
refresh_interval_(refresh_interval) {
DCHECK(video_sender_);
DCHECK(client);
if (refresh_interval_.is_positive()) {
refresh_timer_.Start(
FROM_HERE, refresh_interval_,
base::BindRepeating(&VideoRtpStream::OnRefreshTimerFired,
weak_ptr_factory_.GetWeakPtr()));
}
}
VideoRtpStream::~VideoRtpStream() = default;
void VideoRtpStream::InsertVideoFrame(
scoped_refptr<media::VideoFrame> video_frame) {
DCHECK(client_);
if (!video_frame->metadata().reference_time) {
client_->OnError("Missing REFERENCE_TIME.");
return;
}
// If the refresh timer isn't running when we receive a frame, restart it.
if (refresh_interval_.is_positive() && !refresh_timer_.IsRunning()) {
refresh_timer_.Reset();
}
base::TimeTicks reference_time = *video_frame->metadata().reference_time;
DCHECK(!reference_time.is_null());
if (expecting_a_refresh_frame_) {
// There is uncertainty as to whether the video frame was in response to a
// refresh request. However, if it was not, more video frames will soon
// follow, and before the refresh timer can fire again. Thus, the
// behavior resulting from this logic will be correct.
expecting_a_refresh_frame_ = false;
} else if (refresh_interval_.is_positive()) {
// The following re-starts the timer, scheduling it to fire at
// kRefreshInterval from now.
refresh_timer_.Reset();
}
if (!(video_frame->format() == media::PIXEL_FORMAT_I420 ||
video_frame->format() == media::PIXEL_FORMAT_NV12 ||
video_frame->format() == media::PIXEL_FORMAT_YV12 ||
video_frame->format() == media::PIXEL_FORMAT_I420A)) {
client_->OnError("Incompatible video frame format.");
return;
}
// Used by chrome/browser/media/cast_mirroring_performance_browsertest.cc
TRACE_EVENT_INSTANT2("cast_perf_test", "ConsumeVideoFrame",
TRACE_EVENT_SCOPE_THREAD, "timestamp",
(reference_time - base::TimeTicks()).InMicroseconds(),
"time_delta", video_frame->timestamp().InMicroseconds());
video_sender_->InsertRawVideoFrame(std::move(video_frame), reference_time);
}
void VideoRtpStream::SetTargetPlayoutDelay(base::TimeDelta playout_delay) {
video_sender_->SetTargetPlayoutDelay(playout_delay);
}
base::TimeDelta VideoRtpStream::GetTargetPlayoutDelay() const {
return video_sender_->GetTargetPlayoutDelay();
}
void VideoRtpStream::OnRefreshTimerFired() {
if (expecting_a_refresh_frame_) {
// This means we requested a refresh frame, but never received it. This may
// happen if the capturer is in a paused state. So, we should stop the
// timer. The timer will restart the next time Reset() is called.
refresh_timer_.Stop();
return;
}
DVLOG(1) << "VideoRtpStream is requesting another refresh frame.";
expecting_a_refresh_frame_ = true;
client_->RequestRefreshFrame();
}
//------------------------------------------------------------------
// AudioRtpStream
//------------------------------------------------------------------
AudioRtpStream::AudioRtpStream(
std::unique_ptr<media::cast::AudioSender> audio_sender,
base::WeakPtr<RtpStreamClient> client)
: audio_sender_(std::move(audio_sender)), client_(std::move(client)) {
DCHECK(audio_sender_);
DCHECK(client_);
}
AudioRtpStream::~AudioRtpStream() = default;
void AudioRtpStream::InsertAudio(std::unique_ptr<media::AudioBus> audio_bus,
base::TimeTicks capture_time) {
audio_sender_->InsertAudio(std::move(audio_bus), capture_time);
}
void AudioRtpStream::SetTargetPlayoutDelay(base::TimeDelta playout_delay) {
audio_sender_->SetTargetPlayoutDelay(playout_delay);
}
base::TimeDelta AudioRtpStream::GetTargetPlayoutDelay() const {
return audio_sender_->GetTargetPlayoutDelay();
}
int AudioRtpStream::GetEncoderBitrate() const {
return audio_sender_->GetEncoderBitrate();
}
} // namespace mirroring
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