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SPDX standardizes how source code conveys its copyright and licensing information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX tags are adopted in many large projects, including things like the Linux kernel.
63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <atomic>
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#include <condition_variable>
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#include <mutex>
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#include <thread>
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#if defined(HAVE_ALSA) && HAVE_ALSA
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#include <alsa/asoundlib.h>
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#endif
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#include "AudioCommon/SoundStream.h"
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#include "Common/CommonTypes.h"
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class AlsaSound final : public SoundStream
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{
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#if defined(HAVE_ALSA) && HAVE_ALSA
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public:
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AlsaSound();
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~AlsaSound() override;
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bool Init() override;
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void SoundLoop() override;
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void Update() override;
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bool SetRunning(bool running) override;
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static bool isValid() { return true; }
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private:
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// maximum number of frames the buffer can hold
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static constexpr size_t BUFFER_SIZE_MAX = 8192;
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// minimum number of frames to deliver in one transfer
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static constexpr u32 FRAME_COUNT_MIN = 256;
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// number of channels per frame
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static constexpr u32 CHANNEL_COUNT = 2;
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enum class ALSAThreadStatus
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{
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RUNNING,
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PAUSED,
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STOPPING,
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STOPPED,
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};
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bool AlsaInit();
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void AlsaShutdown();
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s16 mix_buffer[BUFFER_SIZE_MAX * CHANNEL_COUNT];
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std::thread thread;
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std::atomic<ALSAThreadStatus> m_thread_status;
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std::condition_variable cv;
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std::mutex cv_m;
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snd_pcm_t* handle;
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unsigned int frames_to_deliver;
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#endif
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};
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