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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cast/standalone_receiver/streaming_playback_controller.h"
#include <string>
#if defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
#include "cast/standalone_receiver/sdl_audio_player.h" // nogncheck
#include "cast/standalone_receiver/sdl_glue.h" // nogncheck
#include "cast/standalone_receiver/sdl_video_player.h" // nogncheck
#else
#include "cast/standalone_receiver/dummy_player.h" // nogncheck
#endif // defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
#include "util/trace_logging.h"
namespace openscreen {
namespace cast {
StreamingPlaybackController::Client::~Client() = default;
#if defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
StreamingPlaybackController::StreamingPlaybackController(
TaskRunner* task_runner,
StreamingPlaybackController::Client* client)
: task_runner_(task_runner),
client_(client),
sdl_event_loop_(task_runner_, [this] {
client_->OnPlaybackError(this,
Error{Error::Code::kOperationCancelled,
std::string("SDL event loop closed.")});
}) {
OSP_DCHECK(task_runner_ != nullptr);
OSP_DCHECK(client_ != nullptr);
constexpr int kDefaultWindowWidth = 1280;
constexpr int kDefaultWindowHeight = 720;
window_ = MakeUniqueSDLWindow(
"Cast Streaming Receiver Demo",
SDL_WINDOWPOS_UNDEFINED /* initial X position */,
SDL_WINDOWPOS_UNDEFINED /* initial Y position */, kDefaultWindowWidth,
kDefaultWindowHeight, SDL_WINDOW_RESIZABLE);
OSP_CHECK(window_) << "Failed to create SDL window: " << SDL_GetError();
renderer_ = MakeUniqueSDLRenderer(window_.get(), -1, 0);
OSP_CHECK(renderer_) << "Failed to create SDL renderer: " << SDL_GetError();
sdl_event_loop_.RegisterForKeyboardEvent(
[this](const SDL_KeyboardEvent& event) {
this->HandleKeyboardEvent(event);
});
}
#else
StreamingPlaybackController::StreamingPlaybackController(
TaskRunner* task_runner,
StreamingPlaybackController::Client* client)
: task_runner_(task_runner), client_(client) {
OSP_DCHECK(task_runner_ != nullptr);
OSP_DCHECK(client_ != nullptr);
}
#endif // defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
void StreamingPlaybackController::OnNegotiated(
const ReceiverSession* session,
ReceiverSession::ConfiguredReceivers receivers) {
TRACE_DEFAULT_SCOPED(TraceCategory::kStandaloneReceiver);
Initialize(receivers);
}
void StreamingPlaybackController::OnRemotingNegotiated(
const ReceiverSession* session,
ReceiverSession::RemotingNegotiation negotiation) {
remoting_receiver_ =
std::make_unique<SimpleRemotingReceiver>(negotiation.messenger);
remoting_receiver_->SendInitializeMessage(
[this, receivers = negotiation.receivers](AudioCodec audio_codec,
VideoCodec video_codec) {
// The configurations in |negotiation| do not have the actual codecs,
// only REMOTE_AUDIO and REMOTE_VIDEO. Once we receive the
// initialization callback method, we can override with the actual
// codecs here.
auto mutable_receivers = receivers;
mutable_receivers.audio_config.codec = audio_codec;
mutable_receivers.video_config.codec = video_codec;
Initialize(mutable_receivers);
});
}
void StreamingPlaybackController::OnReceiversDestroying(
const ReceiverSession* session,
ReceiversDestroyingReason reason) {
OSP_LOG_INFO << "Receivers are currently destroying, resetting SDL players.";
audio_player_.reset();
video_player_.reset();
}
void StreamingPlaybackController::OnError(const ReceiverSession* session,
Error error) {
client_->OnPlaybackError(this, error);
}
void StreamingPlaybackController::Initialize(
ReceiverSession::ConfiguredReceivers receivers) {
#if defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
OSP_LOG_INFO << "Successfully negotiated a session, creating SDL players.";
if (receivers.audio_receiver) {
audio_player_ = std::make_unique<SDLAudioPlayer>(
&Clock::now, task_runner_, receivers.audio_receiver,
receivers.audio_config.codec, [this] {
client_->OnPlaybackError(this, audio_player_->error_status());
});
}
if (receivers.video_receiver) {
video_player_ = std::make_unique<SDLVideoPlayer>(
&Clock::now, task_runner_, receivers.video_receiver,
receivers.video_config.codec, renderer_.get(), [this] {
client_->OnPlaybackError(this, video_player_->error_status());
});
}
#else
if (receivers.audio_receiver) {
audio_player_ = std::make_unique<DummyPlayer>(receivers.audio_receiver);
}
if (receivers.video_receiver) {
video_player_ = std::make_unique<DummyPlayer>(receivers.video_receiver);
}
#endif // defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
}
#if defined(CAST_STANDALONE_RECEIVER_HAVE_EXTERNAL_LIBS)
void StreamingPlaybackController::HandleKeyboardEvent(
const SDL_KeyboardEvent& event) {
// We only handle keyboard events if we are remoting.
if (!remoting_receiver_) {
return;
}
switch (event.keysym.sym) {
// See codes here: https://wiki.libsdl.org/SDL_Scancode
case SDLK_KP_SPACE: // fallthrough, "Keypad Space"
case SDLK_SPACE: // "Space"
is_playing_ = !is_playing_;
remoting_receiver_->SendPlaybackRateMessage(is_playing_ ? 1.0 : 0.0);
break;
}
}
#endif
} // namespace cast
} // namespace openscreen
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