PulseAudioDriver.h

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2024 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * 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. If not, see https://www.gnu.org/licenses
 *
 */
#ifndef H2_PULSE_AUDIO_DRIVER_H
#define H2_PULSE_AUDIO_DRIVER_H
 
 
#include <core/IO/AudioOutput.h>
 
#if defined(H2CORE_HAVE_PULSEAUDIO) || _DOXYGEN_
 
#include <pthread.h>
#include <inttypes.h>
#include <pulse/pulseaudio.h>
 
namespace H2Core
{
 
 
 
class PulseAudioDriver : public Object<PulseAudioDriver>, public AudioOutput
{
        H2_OBJECT(PulseAudioDriver)
public:
        PulseAudioDriver(audioProcessCallback processCallback);
        ~PulseAudioDriver();
 
        virtual int init( unsigned nBufferSize ) override;
        virtual int connect() override;
        virtual void disconnect() override;
        virtual unsigned getBufferSize() override;
        virtual unsigned getSampleRate() override;
        virtual float* getOut_L() override;
        virtual float* getOut_R() override;
 
private:
        pthread_t                               m_thread;
        pthread_mutex_t                 m_mutex;
        pthread_cond_t                  m_cond;
        int                                             m_pipe[2];
        audioProcessCallback    m_callback;
        pa_mainloop*                    m_main_loop;
        pa_context*                             m_ctx;
        pa_stream*                              m_stream;
        bool                                    m_connected;
        int                                             m_ready;
        unsigned                                m_sample_rate;
        unsigned                                m_buffer_size;
        float*                                  m_outL;
        float*                                  m_outR;
 
        static void* s_thread_body(void*);
        int thread_body();
 
        static void ctx_state_callback(pa_context* ctx, void* udata);
        static void stream_state_callback(pa_stream* stream, void* udata);
        static void stream_write_callback(pa_stream* stream, size_t bytes, void* udata);
        static void pipe_callback(pa_mainloop_api*, pa_io_event*, int fd,
                                        pa_io_event_flags_t events, void *udata);
};
 
} //namespace H2Core
 
#else
 
#include <core/IO/NullDriver.h>
 
namespace H2Core {
        class PulseAudioDriver : public NullDriver
        {
                H2_OBJECT(PulseAudioDriver)
        public:
                PulseAudioDriver( audioProcessCallback processCallback ) : NullDriver( processCallback ) {}
 
        };
}
 
#endif //H2CORE_HAVE_PULSEAUDIO
 
 
#endif //H2_PULSE_AUDIO_DRIVER_H