source/native-plugins/midi-split.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
  23 // -----------------------------------------------------------------------
  24
  25 typedef struct {
  26     const NativeHostDescriptor* host;
  27 } MidiSplitHandle;
  28
  29 // -----------------------------------------------------------------------
  30
  31 static NativePluginHandle midisplit_instantiate(const NativeHostDescriptor* host)
  32 {
  33     MidiSplitHandle* const handle = (MidiSplitHandle*)malloc(sizeof(MidiSplitHandle));
  34
  35     if (handle == NULL)
  36         return NULL;
  37
  38     handle->host = host;
  39     return handle;
  40 }
  41
  42 #define handlePtr ((MidiSplitHandle*)handle)
  43
  44 static void midisplit_cleanup(NativePluginHandle handle)
  45 {
  46     free(handlePtr);
  47 }
  48
  49 // FIXME for v3.0, use const for the input buffer
  50 static void midisplit_process(NativePluginHandle handle,
  51                               float** inBuffer, float** outBuffer, uint32_t frames,
  52                               const NativeMidiEvent* midiEvents, uint32_t midiEventCount)
  53 {
  54     const NativeHostDescriptor* const host = handlePtr->host;
  55     NativeMidiEvent tmpEvent;
  56
  57     for (uint32_t i=0; i < midiEventCount; ++i)
  58     {
  59         const NativeMidiEvent* const midiEvent = &midiEvents[i];
  60
  61         const uint8_t status  = (uint8_t)MIDI_GET_STATUS_FROM_DATA(midiEvent->data);
  62         const uint8_t channel = (uint8_t)MIDI_GET_CHANNEL_FROM_DATA(midiEvent->data);
  63
  64         if (channel >= MAX_MIDI_CHANNELS)
  65             continue;
  66
  67         tmpEvent.port    = channel;
  68         tmpEvent.time    = midiEvent->time;
  69         tmpEvent.data[0] = status;
  70         tmpEvent.data[1] = midiEvent->data[1];
  71         tmpEvent.data[2] = midiEvent->data[2];
  72         tmpEvent.data[3] = midiEvent->data[3];
  73         tmpEvent.size    = midiEvent->size;
  74
  75         host->write_midi_event(host->handle, &tmpEvent);
  76     }
  77
  78     return;
  79
  80     // unused
  81     (void)inBuffer;
  82     (void)outBuffer;
  83     (void)frames;
  84 }
  85
  86 #undef handlePtr
  87
  88 // -----------------------------------------------------------------------
  89
  90 static const NativePluginDescriptor midisplitDesc = {
  91     .category  = NATIVE_PLUGIN_CATEGORY_UTILITY,
  92     .hints     = NATIVE_PLUGIN_IS_RTSAFE,
  93     .supports  = NATIVE_PLUGIN_SUPPORTS_EVERYTHING,
  94     .audioIns  = 0,
  95     .audioOuts = 0,
  96     .cvIns     = 0,
  97     .cvOuts    = 0,
  98     .midiIns   = 1,
  99     .midiOuts  = MAX_MIDI_CHANNELS,
 100     .paramIns  = 0,
 101     .paramOuts = 0,
 102     .name      = "MIDI Split",
 103     .label     = "midisplit",
 104     .maker     = "falkTX",
 105     .copyright = "GNU GPL v2+",
 106
 107     .instantiate = midisplit_instantiate,
 108     .cleanup     = midisplit_cleanup,
 109
 110     .get_parameter_count = NULL,
 111     .get_parameter_info  = NULL,
 112     .get_parameter_value = NULL,
 113
 114     .get_midi_program_count = NULL,
 115     .get_midi_program_info  = NULL,
 116
 117     .set_parameter_value = NULL,
 118     .set_midi_program    = NULL,
 119     .set_custom_data     = NULL,
 120
 121     .ui_show = NULL,
 122     .ui_idle = NULL,
 123
 124     .ui_set_parameter_value = NULL,
 125     .ui_set_midi_program    = NULL,
 126     .ui_set_custom_data     = NULL,
 127
 128     .activate   = NULL,
 129     .deactivate = NULL,
 130     .process    = midisplit_process,
 131
 132     .get_state = NULL,
 133     .set_state = NULL,
 134
 135     .dispatcher = NULL
 136 };
 137
 138 // -----------------------------------------------------------------------
 139
 140 void carla_register_native_plugin_midisplit(void);
 141
 142 void carla_register_native_plugin_midisplit(void)
 143 {
 144     carla_register_native_plugin(&midisplitDesc);
 145 }
 146
 147 // -----------------------------------------------------------------------