Project Andio

src/audio_core/renderer/audio_device.h

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+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <span>
+
+#include "audio_core/audio_render_manager.h"
+
+namespace Core {
+class System;
+}
+
+namespace AudioCore {
+namespace Sink {
+class Sink;
+}
+
+namespace AudioRenderer {
+/**
+ * An interface to an output audio device available to the Switch.
+ */
+class AudioDevice {
+public:
+    struct AudioDeviceName {
+        std::array<char, 0x100> name;
+
+        AudioDeviceName(const char* name_) {
+            std::strncpy(name.data(), name_, name.size());
+        }
+    };
+
+    std::array<AudioDeviceName, 4> usb_device_names{"AudioStereoJackOutput",
+                                                    "AudioBuiltInSpeakerOutput", "AudioTvOutput",
+                                                    "AudioUsbDeviceOutput"};
+    std::array<AudioDeviceName, 3> device_names{"AudioStereoJackOutput",
+                                                "AudioBuiltInSpeakerOutput", "AudioTvOutput"};
+    std::array<AudioDeviceName, 3> output_device_names{"AudioBuiltInSpeakerOutput", "AudioTvOutput",
+                                                       "AudioExternalOutput"};
+
+    explicit AudioDevice(Core::System& system, u64 applet_resource_user_id, u32 revision);
+
+    /**
+     * Get a list of the available output devices.
+     *
+     * @param out_buffer - Output buffer to write the available device names.
+     * @param max_count  - Maximum number of devices to write (count of out_buffer).
+     * @return Number of device names written.
+     */
+    u32 ListAudioDeviceName(std::vector<AudioDeviceName>& out_buffer, size_t max_count);
+
+    /**
+     * Get a list of the available output devices.
+     * Different to above somehow...
+     *
+     * @param out_buffer - Output buffer to write the available device names.
+     * @param max_count  - Maximum number of devices to write (count of out_buffer).
+     * @return Number of device names written.
+     */
+    u32 ListAudioOutputDeviceName(std::vector<AudioDeviceName>& out_buffer, size_t max_count);
+
+    /**
+     * Set the volume of all streams in the backend sink.
+     *
+     * @param volume - Volume to set.
+     */
+    void SetDeviceVolumes(f32 volume);
+
+    /**
+     * Get the volume for a given device name.
+     * Note: This is not fully implemented, we only assume 1 device for all streams.
+     *
+     * @param name - Name of the device to check. Unused.
+     * @return Volume of the device.
+     */
+    f32 GetDeviceVolume(std::string_view name);
+
+private:
+    /// Backend output sink for the device
+    Sink::Sink& output_sink;
+    /// Resource id this device is used for
+    const u64 applet_resource_user_id;
+    /// User audio renderer revision
+    const u32 user_revision;
+};
+
+} // namespace AudioRenderer
+} // namespace AudioCore