source/native-plugins/midi-join.c

   1 /*
   2  * Carla Native Plugins
   3  * Copyright (C) 2012-2019 Filipe Coelho <falktx@falktx.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  16  */
  17
  18 #include "CarlaNative.h"
  19 #include "CarlaMIDI.h"
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23
  24 // -----------------------------------------------------------------------
  25
  26 typedef struct {
  27     const NativeHostDescriptor* host;
  28 } MidiSplitHandle;
  29
  30 // -----------------------------------------------------------------------
  31
  32 static NativePluginHandle midijoin_instantiate(const NativeHostDescriptor* host)
  33 {
  34     MidiSplitHandle* const handle = (MidiSplitHandle*)malloc(sizeof(MidiSplitHandle));
  35
  36     if (handle == NULL)
  37         return NULL;
  38
  39     handle->host = host;
  40     return handle;
  41 }
  42
  43 #define handlePtr ((MidiSplitHandle*)handle)
  44
  45 static void midijoin_cleanup(NativePluginHandle handle)
  46 {
  47     free(handlePtr);
  48 }
  49
  50 // FIXME for v3.0, use const for the input buffer
  51 static void midijoin_process(NativePluginHandle handle,
  52                              float** inBuffer, float** outBuffer, uint32_t frames,
  53                              const NativeMidiEvent* midiEvents, uint32_t midiEventCount)
  54 {
  55     const NativeHostDescriptor* const host = handlePtr->host;
  56     NativeMidiEvent tmpEvent;
  57
  58     for (uint32_t i=0; i < midiEventCount; ++i)
  59     {
  60         const NativeMidiEvent* const midiEvent = &midiEvents[i];
  61
  62         if (midiEvent->port >= MAX_MIDI_CHANNELS)
  63         {
  64             printf("Assertion error: midiEvent->port:%u >= MAX_MIDI_CHANNELS\n", midiEvent->port);
  65             continue;
  66         }
  67
  68         const uint8_t statusByte = midiEvent->data[0];
  69
  70         if (MIDI_IS_CHANNEL_MESSAGE(statusByte))
  71             tmpEvent.data[0] = (uint8_t)((statusByte & MIDI_STATUS_BIT) | (midiEvent->port & MIDI_CHANNEL_BIT));
  72         else
  73             tmpEvent.data[0] = statusByte;
  74
  75         tmpEvent.port    = 0;
  76         tmpEvent.time    = midiEvent->time;
  77         tmpEvent.data[1] = midiEvent->data[1];
  78         tmpEvent.data[2] = midiEvent->data[2];
  79         tmpEvent.data[3] = midiEvent->data[3];
  80         tmpEvent.size    = midiEvent->size;
  81
  82         host->write_midi_event(host->handle, &tmpEvent);
  83     }
  84
  85     return;
  86
  87     // unused
  88     (void)inBuffer;
  89     (void)outBuffer;
  90     (void)frames;
  91 }
  92
  93 #undef handlePtr
  94
  95 // -----------------------------------------------------------------------
  96
  97 static const NativePluginDescriptor midijoinDesc = {
  98     .category  = NATIVE_PLUGIN_CATEGORY_UTILITY,
  99     .hints     = NATIVE_PLUGIN_IS_RTSAFE,
 100     .supports  = NATIVE_PLUGIN_SUPPORTS_EVERYTHING,
 101     .audioIns  = 0,
 102     .audioOuts = 0,
 103     .cvIns     = 0,
 104     .cvOuts    = 0,
 105     .midiIns   = MAX_MIDI_CHANNELS,
 106     .midiOuts  = 1,
 107     .paramIns  = 0,
 108     .paramOuts = 0,
 109     .name      = "MIDI Join",
 110     .label     = "midijoin",
 111     .maker     = "falkTX",
 112     .copyright = "GNU GPL v2+",
 113
 114     .instantiate = midijoin_instantiate,
 115     .cleanup     = midijoin_cleanup,
 116
 117     .get_parameter_count = NULL,
 118     .get_parameter_info  = NULL,
 119     .get_parameter_value = NULL,
 120
 121     .get_midi_program_count = NULL,
 122     .get_midi_program_info  = NULL,
 123
 124     .set_parameter_value = NULL,
 125     .set_midi_program    = NULL,
 126     .set_custom_data     = NULL,
 127
 128     .ui_show = NULL,
 129     .ui_idle = NULL,
 130
 131     .ui_set_parameter_value = NULL,
 132     .ui_set_midi_program    = NULL,
 133     .ui_set_custom_data     = NULL,
 134
 135     .activate   = NULL,
 136     .deactivate = NULL,
 137     .process    = midijoin_process,
 138
 139     .get_state = NULL,
 140     .set_state = NULL,
 141
 142     .dispatcher = NULL
 143 };
 144
 145 // -----------------------------------------------------------------------
 146
 147 void carla_register_native_plugin_midijoin(void);
 148
 149 void carla_register_native_plugin_midijoin(void)
 150 {
 151     carla_register_native_plugin(&midijoinDesc);
 152 }
 153
 154 // -----------------------------------------------------------------------