winmmemidi_io.h

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/*
 * Copyright (C) 2015-2017 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef WINMME_MIDI_IO_H
#define WINMME_MIDI_IO_H
 
#include <map>
#include <memory>
#include <vector>
#include <string>
#include <stdint.h>
#include <pthread.h>
 
#include "pbd/ringbuffer.h"
 
#include "winmmemidi_input_device.h"
#include "winmmemidi_output_device.h"
 
#include "midi_device_info.h"
 
namespace ARDOUR {
 
struct WinMMEMIDIPacket {
 
#if 0
        WinMMEMIDIPacket (const WinMMEMIDIPacket& other)
            : timeStamp (other.timeStamp)
            , length (other.length)
        {
                if (length > 0) {
                        memcpy (data, other.data, length);
                }
        }
#endif
 
        // MIDITimeStamp timeStamp;
        uint16_t length;
        uint8_t data[MaxWinMidiEventSize];
};
 
typedef std::vector<std::shared_ptr<WinMMEMIDIPacket> > WinMMEMIDIQueue;
 
class WinMMEMidiIO {
public:
        WinMMEMidiIO ();
        ~WinMMEMidiIO ();
 
        void start ();
        void stop ();
 
        bool dequeue_input_event (uint32_t port,
                                  uint64_t timestamp_start,
                                  uint64_t timestamp_end,
                                  uint64_t& timestamp,
                                  uint8_t* data,
                                  size_t& size);
 
        bool enqueue_output_event (uint32_t port,
                                   uint64_t timestamp,
                                   const uint8_t* data,
                                   const size_t size);
 
        uint32_t n_midi_inputs (void) const { return m_inputs.size(); }
        uint32_t n_midi_outputs (void) const { return m_outputs.size(); }
 
        std::vector<WinMMEMidiInputDevice*> get_inputs () { return m_inputs; }
        std::vector<WinMMEMidiOutputDevice*> get_outputs () { return m_outputs; }
 
        void update_device_info ();
 
        std::vector<MidiDeviceInfo*> get_device_info () { return m_device_info; }
 
        MidiDeviceInfo* get_device_info (const std::string& name);
 
        std::string port_id (uint32_t, bool input);
        std::string port_name (uint32_t, bool input);
 
        void set_enabled (bool yn = true) { m_enabled = yn; }
        bool enabled (void) const { return m_active && m_enabled; }
 
        void set_port_changed_callback (void (changed_callback (void*)), void *arg) {
                m_changed_callback = changed_callback;
                m_changed_arg = arg;
        }
 
private: // Methods
 
        void clear_device_info ();
 
        static bool get_input_name_from_index (int index, std::string& name);
        static bool get_output_name_from_index (int index, std::string& name);
 
        void discover ();
        void cleanup ();
 
        void create_input_devices ();
        void create_output_devices ();
 
        void destroy_input_devices ();
        void destroy_output_devices ();
 
        void start_devices ();
        void stop_devices ();
 
private: // Data
 
        std::vector<MidiDeviceInfo*> m_device_info;
 
        std::vector<WinMMEMidiInputDevice*> m_inputs;
        std::vector<WinMMEMidiOutputDevice*> m_outputs;
 
        bool              m_active;
        bool              m_enabled;
        bool              m_run;
 
        void (* m_changed_callback) (void*);
        void  * m_changed_arg;
 
        // protects access to m_inputs and m_outputs
        pthread_mutex_t m_device_lock;
};
 
} // namespace
 
#endif // WINMME_MIDI_IO_H