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Carla
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Audio plugin host https://kx.studio/carla
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Carla/source/rest/rest-server.cpp

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  1. /*

  2.  * Carla REST API Server

  3.  * Copyright (C) 2018 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. /* NOTE

  19.  * Even though Carla is GPL, restbed if AGPL.

  20.  * As such, the resulting binary will be AGPL.

  21.  * Take this into consideration before deploying it to any servers.

  22.  */

  23. 

  24. #include "common.hpp"

  25. 

  26. #include "carla-host.cpp"

  27. #include "carla-utils.cpp"

  28. 

  29. #include "CarlaMutex.hpp"

  30. #include "CarlaStringList.hpp"

  31. 

  32. // -------------------------------------------------------------------------------------------------------------------

  33. 

  34. std::vector<std::shared_ptr<Session>> gSessions;

  35. 

  36. CarlaStringList gSessionMessages;

  37. CarlaMutex gSessionMessagesMutex;

  38. 

  39. // -------------------------------------------------------------------------------------------------------------------

  40. 

  41. void send_server_side_message(const char* const message)

  42. {

  43.     const CarlaMutexLocker cml(gSessionMessagesMutex);

  44. 

  45.     gSessionMessages.append(message);

  46. }

  47. 

  48. // -------------------------------------------------------------------------------------------------------------------

  49. 

  50. static void register_server_side_handler(const std::shared_ptr<Session> session)

  51. {

  52.     const auto headers = std::multimap<std::string, std::string> {

  53.         { "Connection", "keep-alive" },

  54.         { "Cache-Control", "no-cache" },

  55.         { "Content-Type", "text/event-stream" },

  56.         { "Access-Control-Allow-Origin", "*" } //Only required for demo purposes.

  57.     };

  58. 

  59.     session->yield(OK, headers, [](const std::shared_ptr<Session> rsession) {

  60.         gSessions.push_back(rsession);

  61.     });

  62. }

  63. 

  64. static void event_stream_handler(void)

  65. {

  66.     static bool firstInit = true;

  67. 

  68.     if (firstInit)

  69.     {

  70.         firstInit = false;

  71.         carla_stdout("Carla REST-API Server started");

  72.     }

  73. 

  74.     gSessions.erase(

  75.             std::remove_if(gSessions.begin(), gSessions.end(),

  76.                                 [](const std::shared_ptr<Session> &a) {

  77.                                     return a->is_closed();

  78.                                 }),

  79.             gSessions.end());

  80. 

  81.     CarlaStringList messages;

  82. 

  83.     {

  84.         const CarlaMutexLocker cml(gSessionMessagesMutex);

  85. 

  86.         if (gSessionMessages.count() > 0)

  87.             gSessionMessages.moveTo(messages);

  88.     }

  89. 

  90.     for (auto message : messages)

  91.     {

  92.         // std::puts(message);

  93. 

  94.         for (auto session : gSessions)

  95.             session->yield(OK, message);

  96.     }

  97. }

  98. 

  99. // -------------------------------------------------------------------------------------------------------------------

  100. 

  101. static void make_resource(Service& service,

  102.                    const char* const path,

  103.                    const std::function<void (const std::shared_ptr<Session>)>& callback)

  104. {

  105.     std::shared_ptr<Resource> resource = std::make_shared<Resource>();

  106.     resource->set_path(path);

  107.     resource->set_method_handler("GET", callback);

  108.     service.publish(resource);

  109. }

  110. 

  111. // -------------------------------------------------------------------------------------------------------------------

  112. 

  113. int main(int, const char**)

  114. {

  115.     Service service;

  116. 

  117.     // server-side messages

  118.     {

  119.         std::shared_ptr<Resource> resource = std::make_shared<Resource>();

  120.         resource->set_path("/stream");

  121.         resource->set_method_handler("GET", register_server_side_handler);

  122.         service.publish(resource);

  123.     }

  124. 

  125.     // carla-host

  126.     make_resource(service, "/get_engine_driver_count", handle_carla_get_engine_driver_count);

  127.     make_resource(service, "/get_engine_driver_name", handle_carla_get_engine_driver_name);

  128.     make_resource(service, "/get_engine_driver_device_names", handle_carla_get_engine_driver_device_names);

  129.     make_resource(service, "/get_engine_driver_device_info", handle_carla_get_engine_driver_device_info);

  130. 

  131.     make_resource(service, "/engine_init", handle_carla_engine_init);

  132.     make_resource(service, "/engine_close", handle_carla_engine_close);

  133.     make_resource(service, "/is_engine_running", handle_carla_is_engine_running);

  134.     make_resource(service, "/set_engine_about_to_close", handle_carla_set_engine_about_to_close);

  135. 

  136.     make_resource(service, "/set_engine_option", handle_carla_set_engine_option);

  137.     make_resource(service, "/load_file", handle_carla_load_file);

  138.     make_resource(service, "/load_project", handle_carla_load_project);

  139.     make_resource(service, "/save_project", handle_carla_save_project);

  140. 

  141.     make_resource(service, "/patchbay_connect", handle_carla_patchbay_connect);

  142.     make_resource(service, "/patchbay_disconnect", handle_carla_patchbay_disconnect);

  143.     make_resource(service, "/patchbay_refresh", handle_carla_patchbay_refresh);

  144. 

  145.     make_resource(service, "/transport_play", handle_carla_transport_play);

  146.     make_resource(service, "/transport_pause", handle_carla_transport_pause);

  147.     make_resource(service, "/transport_bpm", handle_carla_transport_bpm);

  148.     make_resource(service, "/transport_relocate", handle_carla_transport_relocate);

  149.     make_resource(service, "/get_current_transport_frame", handle_carla_get_current_transport_frame);

  150.     make_resource(service, "/get_transport_info", handle_carla_get_transport_info);

  151. 

  152.     make_resource(service, "/get_current_plugin_count", handle_carla_get_current_plugin_count);

  153.     make_resource(service, "/get_max_plugin_number", handle_carla_get_max_plugin_number);

  154.     make_resource(service, "/add_plugin", handle_carla_add_plugin);

  155.     make_resource(service, "/remove_plugin", handle_carla_remove_plugin);

  156.     make_resource(service, "/remove_all_plugins", handle_carla_remove_all_plugins);

  157. 

  158.     make_resource(service, "/rename_plugin", handle_carla_rename_plugin);

  159.     make_resource(service, "/clone_plugin", handle_carla_clone_plugin);

  160.     make_resource(service, "/replace_plugin", handle_carla_replace_plugin);

  161.     make_resource(service, "/switch_plugins", handle_carla_switch_plugins);

  162. 

  163.     make_resource(service, "/load_plugin_state", handle_carla_load_plugin_state);

  164.     make_resource(service, "/save_plugin_state", handle_carla_save_plugin_state);

  165.     make_resource(service, "/export_plugin_lv2", handle_carla_export_plugin_lv2);

  166. 

  167.     make_resource(service, "/get_plugin_info", handle_carla_get_plugin_info);

  168.     make_resource(service, "/get_audio_port_count_info", handle_carla_get_audio_port_count_info);

  169.     make_resource(service, "/get_midi_port_count_info", handle_carla_get_midi_port_count_info);

  170.     make_resource(service, "/get_parameter_count_info", handle_carla_get_parameter_count_info);

  171.     make_resource(service, "/get_parameter_info", handle_carla_get_parameter_info);

  172.     make_resource(service, "/get_parameter_scalepoint_info", handle_carla_get_parameter_scalepoint_info);

  173. 

  174.     make_resource(service, "/get_parameter_data", handle_carla_get_parameter_data);

  175.     make_resource(service, "/get_parameter_ranges", handle_carla_get_parameter_ranges);

  176.     make_resource(service, "/get_midi_program_data", handle_carla_get_midi_program_data);

  177.     make_resource(service, "/get_custom_data", handle_carla_get_custom_data);

  178.     make_resource(service, "/get_custom_data_value", handle_carla_get_custom_data_value);

  179.     make_resource(service, "/get_chunk_data", handle_carla_get_chunk_data);

  180. 

  181.     make_resource(service, "/get_parameter_count", handle_carla_get_parameter_count);

  182.     make_resource(service, "/get_program_count", handle_carla_get_program_count);

  183.     make_resource(service, "/get_midi_program_count", handle_carla_get_midi_program_count);

  184.     make_resource(service, "/get_custom_data_count", handle_carla_get_custom_data_count);

  185. 

  186.     make_resource(service, "/get_parameter_text", handle_carla_get_parameter_text);

  187.     make_resource(service, "/get_program_name", handle_carla_get_program_name);

  188.     make_resource(service, "/get_midi_program_name", handle_carla_get_midi_program_name);

  189.     make_resource(service, "/get_real_plugin_name", handle_carla_get_real_plugin_name);

  190. 

  191.     make_resource(service, "/get_current_program_index", handle_carla_get_current_program_index);

  192.     make_resource(service, "/get_current_midi_program_index", handle_carla_get_current_midi_program_index);

  193. 

  194.     make_resource(service, "/get_default_parameter_value", handle_carla_get_default_parameter_value);

  195.     make_resource(service, "/get_current_parameter_value", handle_carla_get_current_parameter_value);

  196.     make_resource(service, "/get_internal_parameter_value", handle_carla_get_internal_parameter_value);

  197.     make_resource(service, "/get_input_peak_value", handle_carla_get_input_peak_value);

  198.     make_resource(service, "/get_output_peak_value", handle_carla_get_output_peak_value);

  199. 

  200.     make_resource(service, "/set_active", handle_carla_set_active);

  201.     make_resource(service, "/set_drywet", handle_carla_set_drywet);

  202.     make_resource(service, "/set_volume", handle_carla_set_volume);

  203.     make_resource(service, "/set_balance_left", handle_carla_set_balance_left);

  204.     make_resource(service, "/set_balance_right", handle_carla_set_balance_right);

  205.     make_resource(service, "/set_panning", handle_carla_set_panning);

  206.     make_resource(service, "/set_ctrl_channel", handle_carla_set_ctrl_channel);

  207.     make_resource(service, "/set_option", handle_carla_set_option);

  208. 

  209.     make_resource(service, "/set_parameter_value", handle_carla_set_parameter_value);

  210.     make_resource(service, "/set_parameter_midi_channel", handle_carla_set_parameter_midi_channel);

  211.     make_resource(service, "/set_parameter_midi_cc", handle_carla_set_parameter_midi_cc);

  212.     make_resource(service, "/set_program", handle_carla_set_program);

  213.     make_resource(service, "/set_midi_program", handle_carla_set_midi_program);

  214.     make_resource(service, "/set_custom_data", handle_carla_set_custom_data);

  215.     make_resource(service, "/set_chunk_data", handle_carla_set_chunk_data);

  216. 

  217.     make_resource(service, "/prepare_for_save", handle_carla_prepare_for_save);

  218.     make_resource(service, "/reset_parameters", handle_carla_reset_parameters);

  219.     make_resource(service, "/randomize_parameters", handle_carla_randomize_parameters);

  220.     make_resource(service, "/send_midi_note", handle_carla_send_midi_note);

  221. 

  222.     make_resource(service, "/get_buffer_size", handle_carla_get_buffer_size);

  223.     make_resource(service, "/get_sample_rate", handle_carla_get_sample_rate);

  224.     make_resource(service, "/get_last_error", handle_carla_get_last_error);

  225.     make_resource(service, "/get_host_osc_url_tcp", handle_carla_get_host_osc_url_tcp);

  226.     make_resource(service, "/get_host_osc_url_udp", handle_carla_get_host_osc_url_udp);

  227. 

  228.     // carla-utils

  229.     make_resource(service, "/get_complete_license_text", handle_carla_get_complete_license_text);

  230.     make_resource(service, "/get_supported_file_extensions", handle_carla_get_supported_file_extensions);

  231.     make_resource(service, "/get_supported_features", handle_carla_get_supported_features);

  232.     make_resource(service, "/get_cached_plugin_count", handle_carla_get_cached_plugin_count);

  233.     make_resource(service, "/get_cached_plugin_info", handle_carla_get_cached_plugin_info);

  234. 

  235.     // schedule events

  236.     service.schedule(engine_idle_handler); // FIXME, crashes on fast times, but we need ~30Hz for OSC..

  237.     service.schedule(event_stream_handler, std::chrono::milliseconds(500));

  238. 

  239.     std::shared_ptr<Settings> settings = std::make_shared<Settings>();

  240.     settings->set_port(2228);

  241.     settings->set_default_header("Connection", "close");

  242. 

  243.     service.start(settings);

  244.     return 0;

  245. }

  246. 

  247. // -------------------------------------------------------------------------------------------------------------------