add libsoundio audio backend

This adds libsoundio (http://libsound.io/) as an available audio backend. libsoundio supports JACK, PulseAudio, ALSA, CoreAudio, WASAPI, and a dummy backend.
2015-09-11 20:30:51 -07:00
parent 36a6fb3936
commit f7ff96fe4f
11 changed files with 602 additions and 1 deletions
--- a/include/AudioSoundIo.h
+++ b/include/AudioSoundIo.h
@@ -0,0 +1,138 @@
+/*
+ * AudioSoundIo.h - device-class that performs PCM-output via libsoundio
+ *
+ * Copyright (c) 2015 Andrew Kelley <superjoe30@gmail.com>
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AUDIO_SOUNDIO_H
+#define AUDIO_SOUNDIO_H
+
+#include <QtCore/QObject>
+
+#include "lmmsconfig.h"
+#include "ComboBoxModel.h"
+
+#ifdef LMMS_HAVE_SOUNDIO
+
+#include <soundio/soundio.h>
+
+#include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
+
+class ComboBox;
+class LcdSpinBox;
+
+// Exists only to work around "Error: Meta object features not supported for nested classes"
+class AudioSoundIoSetupUtil : public QObject
+{
+    Q_OBJECT
+public:
+    void *m_setupWidget;
+public slots:
+    void updateDevices();
+    void reconnectSoundIo();
+};
+
+class AudioSoundIo : public AudioDevice
+{
+public:
+    AudioSoundIo( bool & _success_ful, Mixer* mixer );
+    virtual ~AudioSoundIo();
+
+    inline static QString name()
+    {
+        return QT_TRANSLATE_NOOP( "setupWidget", "soundio" );
+    }
+
+
+    int process_callback( const float *_inputBuffer,
+        float * _outputBuffer,
+        unsigned long _framesPerBuffer );
+
+
+    class setupWidget : public AudioDeviceSetupWidget
+    {
+    public:
+        setupWidget( QWidget * _parent );
+        virtual ~setupWidget();
+
+        virtual void saveSettings();
+
+        void updateDevices();
+        void reconnectSoundIo();
+
+        AudioSoundIoSetupUtil m_setupUtil;
+        ComboBox * m_backend;
+        ComboBox * m_device;
+
+        ComboBoxModel m_backendModel;
+        ComboBoxModel m_deviceModel;
+
+        SoundIo * m_soundio;
+
+        struct DeviceId {
+            QString id;
+            bool is_raw;
+        };
+        QList<DeviceId> m_device_list;
+
+        int m_default_out_index;
+        bool m_is_first;
+
+    } ;
+
+private:
+    virtual void startProcessing();
+    virtual void stopProcessing();
+
+    SoundIo *m_soundio;
+    SoundIoOutStream *m_outstream;
+
+    surroundSampleFrame * m_outBuf;
+    int m_outBufSize;
+    fpp_t m_outBufFramesTotal;
+    fpp_t m_outBufFrameIndex;
+
+    int m_disconnect_err;
+    void on_backend_disconnect(int err);
+
+    void write_callback(int frame_count_min, int frame_count_max);
+    void error_callback(int err);
+    void underflow_callback();
+
+    static void static_write_callback(SoundIoOutStream *outstream, int frame_count_min, int frame_count_max) {
+        return ((AudioSoundIo *)outstream->userdata)->write_callback(frame_count_min, frame_count_max);
+    }
+    static void static_error_callback(SoundIoOutStream *outstream, int err) {
+        return ((AudioSoundIo *)outstream->userdata)->error_callback(err);
+    }
+    static void static_underflow_callback(SoundIoOutStream *outstream) {
+        return ((AudioSoundIo *)outstream->userdata)->underflow_callback();
+    }
+    static void static_on_backend_disconnect(SoundIo *soundio, int err) {
+        return ((AudioSoundIo *)soundio->userdata)->on_backend_disconnect(err);
+    }
+
+};
+
+#endif
+
+#endif