75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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* SPDX-License-Identifier: GPL-3.0-only
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* MuseScore-CLA-applies
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*
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* MuseScore
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* Music Composition & Notation
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*
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* Copyright (C) 2021 MuseScore BVBA and others
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef MU_AUDIO_IAUDIODRIVER_H
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#define MU_AUDIO_IAUDIODRIVER_H
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#include <cstdint>
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#include <string>
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#include <vector>
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#include <functional>
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#include <memory>
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#include "modularity/imoduleexport.h"
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#include "async/notification.h"
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namespace mu::audio {
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class IAudioDriver : MODULE_EXPORT_INTERFACE
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{
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INTERFACE_ID(IAudioDriver)
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public:
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virtual ~IAudioDriver() = default;
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enum class Format {
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AudioF32, // float 32 bit
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AudioS16 // short 16 bit
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};
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using Callback = std::function<void (void* userdata, uint8_t* stream, int len)>;
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struct Spec
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{
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int sampleRate; // frequency -- samples per second
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Format format; // Audio data format
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uint8_t channels; // Number of channels: 1 mono, 2 stereo
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uint16_t samples; // Audio buffer size in sample FRAMES (total samples divided by channel count)
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Callback callback; // Callback that feeds the audio device
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void* userdata; // Userdata passed to callback (ignored for NULL callbacks).
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};
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virtual std::string name() const = 0;
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virtual bool open(const Spec& spec, Spec* activeSpec) = 0;
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virtual void close() = 0;
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virtual bool isOpened() const = 0;
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virtual std::string outputDevice() const = 0;
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virtual bool selectOutputDevice(const std::string& name) = 0;
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virtual std::vector<std::string> availableOutputDevices() const = 0;
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virtual async::Notification availableOutputDevicesChanged() const = 0;
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virtual void resume() = 0;
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virtual void suspend() = 0;
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};
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using IAudioDriverPtr = std::shared_ptr<IAudioDriver>;
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}
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#endif // MU_AUDIO_IAUDIODRIVER_H
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