source/tests/carla-engine-sdl.c

   1 /*
   2  * Carla Host Plugin SDL test
   3  * Copyright (C) 2022-2024 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 "CarlaHost.h"
  19 #include "CarlaUtils.h"
  20
  21 #include <emscripten.h>
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 static void engine_idle_loop(void* const arg)
  27 {
  28     const CarlaHostHandle handle = arg;
  29     carla_engine_idle(handle);
  30
  31     /*
  32     static int counter = 0;
  33     if (++counter == 100)
  34     {
  35         counter = 0;
  36         const uint64_t frame = carla_get_current_transport_frame(handle);
  37         printf("engine_idle_loop | play frame %llu | audio peaks %f %f\n",
  38                frame,
  39                carla_get_output_peak_value(handle, 0, true),
  40                carla_get_output_peak_value(handle, 0, false));
  41     }
  42     */
  43 }
  44
  45 int main(void)
  46 {
  47     printf("carla_get_complete_license_text: %s\n", carla_get_complete_license_text());
  48 //     printf("carla_get_supported_file_extensions: %s\n", carla_get_supported_file_extensions());
  49 //     printf("carla_get_supported_features: %s\n", carla_get_supported_features());
  50     printf("carla_get_library_filename: %s\n", carla_get_library_filename());
  51     printf("carla_get_library_folder: %s\n", carla_get_library_folder());
  52
  53     /*
  54     const uint32_t plugins_count = carla_get_cached_plugin_count(PLUGIN_INTERNAL, NULL);
  55     printf("carla_get_cached_plugin_count: %u\n", plugins_count);
  56
  57     for (uint32_t i=0; i<plugins_count; ++i)
  58     {
  59         const CarlaCachedPluginInfo* const plugin_info = carla_get_cached_plugin_info(PLUGIN_INTERNAL, i);
  60         printf("Loading carla_get_cached_plugin_info #%u '%s'\n", i+1, plugin_info->label);
  61     }
  62     */
  63
  64     const CarlaHostHandle handle = carla_standalone_host_init();
  65     printf("carla_standalone_host_init: %p\n", handle);
  66
  67     carla_set_engine_option(handle, ENGINE_OPTION_PROCESS_MODE, ENGINE_PROCESS_MODE_CONTINUOUS_RACK, NULL);
  68
  69     const bool engine_init = carla_engine_init(handle, "SDL", "Engine Test");
  70     printf("carla_engine_init: %d\n", engine_init);
  71
  72     if (!engine_init)
  73         return 1;
  74
  75     const bool plugin_added = carla_add_plugin(handle, BINARY_NATIVE, PLUGIN_INTERNAL, NULL, "Music", "audiofile", 0, NULL, 0x0);
  76     printf("carla_add_plugin: %d\n", plugin_added);
  77
  78     if (!plugin_added)
  79         goto close;
  80
  81     const bool plugin_added2 = carla_add_plugin(handle, BINARY_NATIVE, PLUGIN_INTERNAL, NULL, "Gain", "audiogain_s", 0, NULL, 0x0);
  82     printf("carla_add_plugin2: %d\n", plugin_added2);
  83
  84     if (!plugin_added2)
  85         goto close;
  86
  87     const uint32_t current_plugins_count = carla_get_current_plugin_count(handle);
  88     printf("carla_get_current_plugin_count: %u\n", current_plugins_count);
  89
  90     if (current_plugins_count != 2)
  91         goto close;
  92
  93     carla_set_parameter_value(handle, 1, 0, 1.0f); // gain
  94
  95     carla_patchbay_connect(handle, false, 1, 3, 3, 1);
  96     carla_patchbay_connect(handle, false, 1, 4, 3, 2);
  97
  98     carla_set_custom_data(handle, 0, CUSTOM_DATA_TYPE_PATH, "file", "/foolme.mp3");
  99     carla_transport_play(handle);
 100
 101     emscripten_set_main_loop_arg(engine_idle_loop, handle, 0, false);
 102
 103     return 0;
 104
 105 close:
 106     printf("carla_engine_close: %d\n", carla_engine_close(handle));
 107     return 1;
 108 }