Play snd0.at9 during the startup splash screen (#1545)

launcher: play snd0.at9 on title selection

src/launcher/CMakeLists.txt

@@ -21,7 +21,8 @@ add_executable(launcher WIN32
 )
 
 
-target_link_libraries(launcher Qt6::Concurrent Qt6::Network Qt6::Widgets Vulkan::Headers SDL3::SDL3-static kyty_git_version common)
+target_link_libraries(launcher Qt6::Concurrent Qt6::Network Qt6::Widgets Vulkan::Headers SDL3::SDL3-static
+	LibAtrac9 kyty_git_version common)
 if(LINUX)
 	find_package(Qt6 COMPONENTS DBus REQUIRED)
 	target_link_libraries(launcher Qt6::DBus)

src/launcher/include/titleSound.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <QByteArray>
+#include <QFutureWatcher>
+#include <QObject>
+#include <QPromise>
+#include <QString>
+#include <QThreadPool>
+
+#include <vector>
+
+struct SDL_AudioStream;
+
+class TitleSound final: public QObject {
+public:
+	explicit TitleSound(QObject* parent = nullptr);
+	~TitleSound() override;
+
+	void SetTitle(const QString& base);
+
+private:
+	struct Sound {
+		std::vector<float> pcm;
+		int                channels = 0;
+		int                rate     = 0;
+	};
+
+	static Sound Decode(const QByteArray& data, const QPromise<Sound>& promise);
+	void         Stop();
+
+	QThreadPool           m_decode_pool;
+	QFutureWatcher<Sound> m_decode;
+	QString               m_base;
+	SDL_AudioStream*      m_stream            = nullptr;
+	bool                  m_audio_initialized = false;
+};

src/launcher/src/mainDialog.cpp

@@ -6,6 +6,7 @@
 #include "configurationListWidget.h"
 #include "controllerPreview.h"
 #include "gameContent.h"
+#include "titleSound.h"
 #include "updateChecker.h"
 
 #include <QApplication>
@@ -90,6 +91,7 @@ private:
 	MainDialog*     m_main_dialog    = nullptr;
 	UpdateChecker*  m_update_checker = nullptr;
 	ControllerPreview m_controller_preview;
+	TitleSound      m_title_sound;
 	QString         m_interpreter;
 
 	QProcess m_process;
@@ -124,7 +126,13 @@ void MainDialogPrivate::Setup(MainDialog* main_dialog) {
 
 	connect(main_dialog, &MainDialog::Start, this, &MainDialogPrivate::FindInterpreter,
 	        Qt::QueuedConnection);
-	connect(m_ui->widget, &ConfigurationListWidget::Select, this, &MainDialogPrivate::Update);
+	connect(m_ui->widget, &ConfigurationListWidget::Select, this, [this]() {
+		Update();
+		const auto* item = m_ui->widget->GetSelectedItem();
+		m_title_sound.SetTitle(m_process.state() == QProcess::NotRunning && item != nullptr
+		                           ? item->GetInfo().basedir
+		                           : QString());
+	});
 	connect(m_ui->widget, &ConfigurationListWidget::PreviewControllerColor, this,
 	        [this](const QString& color) {
 		        if (m_process.state() == QProcess::NotRunning) {
@@ -530,6 +538,7 @@ void MainDialogPrivate::Run() {
 
 	m_running_item->SetRunning(true);
 	m_controller_preview.SetSuspended(true);
+	m_title_sound.SetTitle({});
 
 	auto info = m_ui->widget->CreateConfiguration(*m_running_item);
 	m_main_dialog->RunInterpreter(&m_process, *info);

src/launcher/src/titleSound.cpp

@@ -0,0 +1,106 @@
+#include "titleSound.h"
+
+#include "gameContent.h"
+#include "libs/ajm/atrac9_decoder.h"
+
+#include <QDebug>
+#include <QtConcurrentRun>
+
+#include <SDL3/SDL.h>
+#include <array>
+
+TitleSound::Sound TitleSound::Decode(const QByteArray& data, const QPromise<Sound>& promise) {
+	using namespace Libs::Audio::Ajm;
+	AjmAt9Decoder                decoder(0, 0, AjmSampleEncoding::Float,
+	                                     AJM_INSTANCE_FLAG_DEC_AT9_PARSE_RIFF_HEADER);
+	AjmGaplessState              gapless;
+	std::array<float, 16 * 1024> batch;
+	Sound                        sound;
+	size_t                       offset = 0;
+	while (offset < static_cast<size_t>(data.size()) && !gapless.IsEnd()) {
+		if (promise.isCanceled()) {
+			return {};
+		}
+		const auto result = decoder.Decode(data.constData() + offset, data.size() - offset,
+		                                   batch.data(), sizeof(batch), true, &gapless);
+		if ((result.result != 0 && result.result != AJM_RESULT_NOT_ENOUGH_ROOM) ||
+		    result.input_consumed == 0) {
+			return {};
+		}
+		const auto       samples    = result.output_written / sizeof(float);
+		constexpr size_t MaxSamples = (128u << 20u) / sizeof(float);
+		if (samples > MaxSamples - sound.pcm.size()) {
+			return {};
+		}
+		sound.pcm.insert(sound.pcm.end(), batch.begin(), batch.begin() + samples);
+		offset += result.input_consumed;
+	}
+	if (promise.isCanceled()) {
+		return {};
+	}
+	const auto format = decoder.GetFormat();
+	sound.channels    = static_cast<int>(format.channel_num);
+	sound.rate        = static_cast<int>(format.sampling_frequency);
+	return sound;
+}
+
+TitleSound::TitleSound(QObject* parent): QObject(parent) {
+	m_decode_pool.setMaxThreadCount(1);
+	connect(&m_decode, &QFutureWatcher<Sound>::finished, this, [this] {
+		if (m_decode.isCanceled() || m_decode.future().resultCount() == 0) {
+			return;
+		}
+		auto sound = m_decode.future().takeResult();
+		if (sound.pcm.empty()) {
+			qWarning() << "Cannot decode title sound:" << m_base;
+			return;
+		}
+		m_audio_initialized = SDL_InitSubSystem(SDL_INIT_AUDIO);
+		if (m_audio_initialized) {
+			const SDL_AudioSpec spec {SDL_AUDIO_F32, sound.channels, sound.rate};
+			m_stream = SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &spec, nullptr,
+			                                     nullptr);
+		}
+		if (m_stream == nullptr ||
+		    !SDL_PutAudioStreamData(m_stream, sound.pcm.data(),
+		                            static_cast<int>(sound.pcm.size() * sizeof(float))) ||
+		    !SDL_FlushAudioStream(m_stream) || !SDL_ResumeAudioStreamDevice(m_stream)) {
+			qWarning() << "Cannot play title sound:" << SDL_GetError();
+			Stop();
+		}
+	});
+}
+
+TitleSound::~TitleSound() {
+	m_decode.cancel();
+	Stop();
+}
+
+void TitleSound::SetTitle(const QString& base) {
+	if (base == m_base) {
+		return;
+	}
+	m_decode.cancel();
+	Stop();
+	m_base = base;
+	if (!base.isEmpty()) {
+		m_decode.setFuture(QtConcurrent::run(&m_decode_pool, [base](QPromise<Sound>& promise) {
+			const auto data =
+			    GameContent::ReadFile(base, QStringLiteral("sce_sys/snd0.at9"), 32u << 20u);
+			if (!data.isEmpty() && !promise.isCanceled()) {
+				promise.addResult(Decode(data, promise));
+			}
+		}));
+	}
+}
+
+void TitleSound::Stop() {
+	if (m_stream != nullptr) {
+		SDL_DestroyAudioStream(m_stream);
+		m_stream = nullptr;
+	}
+	if (m_audio_initialized) {
+		SDL_QuitSubSystem(SDL_INIT_AUDIO);
+		m_audio_initialized = false;
+	}
+}