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// Copyright 2021 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/cast_receiver/browser/streaming_receiver_session_client.h"
#include <algorithm>
#include <utility>
#include "base/containers/contains.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/task/sequenced_task_runner.h"
#include "components/cast/message_port/platform_message_port.h"
#include "components/cast_receiver/browser/streaming_controller_base.h"
#include "components/cast_streaming/common/public/cast_streaming_url.h"
#include "media/base/video_decoder_config.h"
namespace cast_receiver {
constexpr base::TimeDelta
StreamingReceiverSessionClient::kMaxAVSettingsWaitTime;
StreamingReceiverSessionClient::StreamingReceiverSessionClient(
scoped_refptr<base::SequencedTaskRunner> task_runner,
network::NetworkContextGetter network_context_getter,
std::unique_ptr<cast_api_bindings::MessagePort> message_port,
content::WebContents* web_contents,
Handler* handler,
cast_receiver::StreamingConfigManager* config_manager,
bool supports_audio,
bool supports_video)
: StreamingReceiverSessionClient(
std::move(task_runner),
std::move(network_context_getter),
StreamingControllerBase::Create(std::move(message_port),
web_contents),
handler,
config_manager,
supports_audio,
supports_video) {}
StreamingReceiverSessionClient::StreamingReceiverSessionClient(
scoped_refptr<base::SequencedTaskRunner> task_runner,
network::NetworkContextGetter network_context_getter,
std::unique_ptr<StreamingController> streaming_controller,
Handler* handler,
cast_receiver::StreamingConfigManager* config_manager,
bool supports_audio,
bool supports_video)
: handler_(handler),
task_runner_(std::move(task_runner)),
streaming_controller_(std::move(streaming_controller)),
supports_audio_(supports_audio),
supports_video_(supports_video),
weak_factory_(this) {
DCHECK(handler_);
DCHECK(task_runner_);
DCHECK(!network_context_getter.is_null());
DCHECK(config_manager);
cast_streaming::SetNetworkContextGetter(std::move(network_context_getter));
DVLOG(1) << "Streaming Receiver Session start pending...";
config_manager->AddConfigObserver(*this);
if (config_manager->has_config()) {
// TODO(crbug.com/1359568): This may not behave correctly if the config is
// updated before the pushed task runs.
task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&StreamingReceiverSessionClient::OnStreamingConfigSet,
weak_factory_.GetWeakPtr(), config_manager->config()));
return;
}
task_runner_->PostDelayedTask(
FROM_HERE,
base::BindOnce(&StreamingReceiverSessionClient::VerifyAVSettingsReceived,
weak_factory_.GetWeakPtr()),
kMaxAVSettingsWaitTime);
}
StreamingReceiverSessionClient::~StreamingReceiverSessionClient() {
DVLOG(1) << "StreamingReceiverSessionClient state when destroyed"
<< "\n\tIs Healthy: " << is_healthy()
<< "\n\tLaunch called: " << is_streaming_launch_pending()
<< "\n\tAV Settings Received: " << has_received_av_settings();
cast_streaming::SetNetworkContextGetter({});
}
StreamingReceiverSessionClient::Handler::~Handler() = default;
void StreamingReceiverSessionClient::LaunchStreamingReceiverAsync() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!is_streaming_launch_pending());
streaming_state_ |= LaunchState::kLaunchCalled;
streaming_controller_->StartPlaybackAsync(
base::BindOnce(&StreamingReceiverSessionClient::OnPlaybackStarted,
weak_factory_.GetWeakPtr()));
}
void StreamingReceiverSessionClient::VerifyAVSettingsReceived() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (streaming_state_ & LaunchState::kAVSettingsReceived) {
return;
}
LOG(ERROR) << "AVSettings not received within the allocated amount of time";
TriggerError();
}
void StreamingReceiverSessionClient::OnPlaybackStarted() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
streaming_state_ |= LaunchState::kLaunched;
handler_->OnStreamingSessionStarted();
}
void StreamingReceiverSessionClient::OnStreamingConfigSet(
const cast_streaming::ReceiverConfig& config) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Make a copy so that it can be mofidied locally.
cast_streaming::ReceiverConfig constraints = config;
if (streaming_state_ == LaunchState::kError) {
LOG(WARNING) << "Config received after an error!";
return;
}
if (!supports_audio_) {
LOG(WARNING) << "Disallowing audio for this streaming session!";
constraints.audio_codecs.clear();
constraints.audio_limits.clear();
}
if (!supports_video_) {
LOG(WARNING) << "Disallowing video for this streaming session!";
constraints.video_codecs.clear();
constraints.video_limits.clear();
}
if (supports_audio_ && supports_video_) {
DVLOG(1) << "Allowing both audio and video for this streaming session!";
}
streaming_state_ |= LaunchState::kAVSettingsReceived;
if (!has_streaming_launched()) {
streaming_controller_->InitializeReceiverSession(config, this);
return;
}
// TODO(crbug.com/1359568): Handle receiving a new config after streaming has
// already started.
LOG(WARNING)
<< "Received updated streaming config during an ongoing session!";
}
void StreamingReceiverSessionClient::OnAudioConfigUpdated(
const ::media::AudioDecoderConfig& audio_config) {}
void StreamingReceiverSessionClient::OnVideoConfigUpdated(
const ::media::VideoDecoderConfig& video_config) {
handler_->OnResolutionChanged(video_config.visible_rect(),
video_config.video_transformation());
}
void StreamingReceiverSessionClient::OnStreamingSessionEnded() {
// The streaming session will only "end" (as opposed to being "renegotated"
// when a new config is sent or the stream changes between mirroring and
// remoting) when the session completely exits. This occurs either when there
// is an error in the runtime or the when sender-side ends the streaming
// session.
//
// In either case, the result is an unsupported state for the
// StreamingRuntimeApplication, so an error.
TriggerError();
}
void StreamingReceiverSessionClient::TriggerError() {
if (!is_healthy()) {
return;
}
streaming_state_ |= LaunchState::kError;
handler_->OnError();
}
} // namespace cast_receiver
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