Project Andio

src/audio_core/audio_out_manager.h

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+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <mutex>
+
+#include "audio_core/renderer/audio_device.h"
+
+namespace Core {
+class System;
+}
+
+namespace AudioCore::AudioOut {
+class Out;
+
+constexpr size_t MaxOutSessions = 12;
+/**
+ * Manages all audio out sessions.
+ */
+class Manager {
+public:
+    explicit Manager(Core::System& system);
+
+    /**
+     * Acquire a free session id for opening a new audio out.
+     *
+     * @param session_id - Output session_id.
+     * @return Result code.
+     */
+    Result AcquireSessionId(size_t& session_id);
+
+    /**
+     * Release a session id on close.
+     *
+     * @param session_id - Session id to free.
+     */
+    void ReleaseSessionId(size_t session_id);
+
+    /**
+     * Link this manager to the main audio manager.
+     *
+     * @return Result code.
+     */
+    Result LinkToManager();
+
+    /**
+     * Start the audio out manager.
+     */
+    void Start();
+
+    /**
+     * Callback function, called by the audio manager when the audio out event is signalled.
+     */
+    void BufferReleaseAndRegister();
+
+    /**
+     * Get a list of audio out device names.
+     *
+     * @oaram names     - Output container to write names to.
+     * @return Number of names written.
+     */
+    u32 GetAudioOutDeviceNames(
+        std::vector<AudioRenderer::AudioDevice::AudioDeviceName>& names) const;
+
+    /// Core system
+    Core::System& system;
+    /// Array of session ids
+    std::array<size_t, MaxOutSessions> session_ids{};
+    /// Array of resource user ids
+    std::array<size_t, MaxOutSessions> applet_resource_user_ids{};
+    /// Pointer to each open session
+    std::array<std::shared_ptr<Out>, MaxOutSessions> sessions{};
+    /// The number of free sessions
+    size_t num_free_sessions{};
+    /// The next session id to be taken
+    size_t next_session_id{};
+    /// The next session id to be freed
+    size_t free_session_id{};
+    /// Whether this is linked to the audio manager
+    bool linked_to_manager{};
+    /// Whether the sessions have been started
+    bool sessions_started{};
+    /// Protect state due to audio manager callback
+    std::recursive_mutex mutex{};
+};
+
+} // namespace AudioCore::AudioOut