Project Andio

src/audio_core/sink/null_sink.h

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+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "audio_core/sink/sink.h"
+#include "audio_core/sink/sink_stream.h"
+
+namespace AudioCore::Sink {
+/**
+ * A no-op sink for when no audio out is wanted.
+ */
+class NullSink final : public Sink {
+public:
+    explicit NullSink(std::string_view) {}
+    ~NullSink() override = default;
+
+    SinkStream* AcquireSinkStream([[maybe_unused]] Core::System& system,
+                                  [[maybe_unused]] u32 system_channels,
+                                  [[maybe_unused]] const std::string& name,
+                                  [[maybe_unused]] StreamType type) override {
+        return &null_sink_stream;
+    }
+
+    void CloseStream([[maybe_unused]] const SinkStream* stream) override {}
+    void CloseStreams() override {}
+    void PauseStreams() override {}
+    void UnpauseStreams() override {}
+    f32 GetDeviceVolume() const override {
+        return 1.0f;
+    }
+    void SetDeviceVolume(f32 volume) override {}
+    void SetSystemVolume(f32 volume) override {}
+
+private:
+    struct NullSinkStreamImpl final : SinkStream {
+        void Finalize() override {}
+        void Start(bool resume = false) override {}
+        void Stop() override {}
+        void AppendBuffer([[maybe_unused]] ::AudioCore::Sink::SinkBuffer& buffer,
+                          [[maybe_unused]] std::vector<s16>& samples) override {}
+        std::vector<s16> ReleaseBuffer([[maybe_unused]] u64 num_samples) override {
+            return {};
+        }
+        bool IsBufferConsumed([[maybe_unused]] const u64 tag) {
+            return true;
+        }
+        void ClearQueue() override {}
+    } null_sink_stream;
+};
+
+} // namespace AudioCore::Sink