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jack2
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jack2/common/JackWeakAPI.cpp

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  1. /*

  2. Copyright (C) 2009 Grame

  3. 

  4. This program is free software; you can redistribute it and/or modify

  5. it under the terms of the GNU Lesser General Public License as published by

  6. the Free Software Foundation; either version 2.1 of the License, or

  7. (at your option) any later version.

  8. 

  9. This program is distributed in the hope that it will be useful,

  10. but WITHOUT ANY WARRANTY; without even the implied warranty of

  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12. GNU Lesser General Public License for more details.

  13. 

  14. You should have received a copy of the GNU Lesser General Public License

  15. along with this program; if not, write to the Free Software

  16. Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

  17. 

  18. */

  19. 

  20. /*

  21.     Completed from Julien Pommier (PianoTeq : http://www.pianoteq.com/) code.

  22. */

  23. 

  24. #include "jack.h"

  25. #include <math.h>

  26. #include <dlfcn.h>

  27. #include <stdlib.h>

  28. #include <cassert>

  29. #include <iostream>

  30. 

  31. /* dynamically load libjack and forward all registered calls to libjack 

  32.    (similar to what relaytool is trying to do, but more portably..)

  33. */

  34. 

  35. using std::cerr;

  36. 

  37. int libjack_is_present = 0;     // public symbol, similar to what relaytool does.

  38. static void *libjack_handle = 0;

  39. 

  40. static void __attribute__((constructor)) tryload_libjack()

  41. {

  42.     if (getenv("SKIP_LIBJACK") == 0) { // just in case libjack is causing troubles..

  43.         libjack_handle = dlopen("libjack.so.0", RTLD_LAZY);

  44.     }

  45.     libjack_is_present = (libjack_handle != 0);

  46. }

  47. 

  48. void *load_jack_function(const char *fn_name) 

  49. {

  50.     void *fn = 0;

  51.     if (!libjack_handle) { 

  52.         std::cerr << "libjack not found, so do not try to load " << fn_name << " ffs !\n";

  53.         return 0;

  54.     }

  55.     fn = dlsym(libjack_handle, fn_name);

  56.     if (!fn) { 

  57.         std::cerr << "could not dlsym(" << libjack_handle << "), " << dlerror() << "\n"; 

  58.     }

  59.     return fn;

  60. }

  61. 

  62. #define DECL_FUNCTION(return_type, fn_name, arguments_types, arguments) \

  63.   typedef return_type (*fn_name##_ptr_t)arguments_types;                \

  64.   return_type fn_name arguments_types {                                 \

  65.     static fn_name##_ptr_t fn = 0;                                      \

  66.     if (fn == 0) { fn = (fn_name##_ptr_t)load_jack_function(#fn_name); } \

  67.     if (fn) return (*fn)arguments;                                      \

  68.     else return 0;                                                      \

  69.   }

  70. 

  71. #define DECL_VOID_FUNCTION(fn_name, arguments_types, arguments)         \

  72.   typedef void (*fn_name##_ptr_t)arguments_types;                       \

  73.   void fn_name arguments_types {                                        \

  74.     static fn_name##_ptr_t fn = 0;                                      \

  75.     if (fn == 0) { fn = (fn_name##_ptr_t)load_jack_function(#fn_name); } \

  76.     if (fn) (*fn)arguments;                                             \

  77.   }

  78. 

  79. DECL_VOID_FUNCTION(jack_get_version, (int *major_ptr, int *minor_ptr, int *micro_ptr, int *proto_ptr), (major_ptr, minor_ptr, micro_ptr, proto_ptr));

  80. DECL_FUNCTION(const char *, jack_get_version_string, (), ());      

  81. DECL_FUNCTION(jack_client_t *, jack_client_open, (const char *client_name, jack_options_t options, jack_status_t *status, ...), 

  82.               (client_name, options, status));

  83. DECL_FUNCTION(int, jack_client_close, (jack_client_t *client), (client));

  84. DECL_FUNCTION(int, jack_client_new, (const char *client_name), (client_name));

  85. DECL_FUNCTION(int, jack_client_name_size, (), ());

  86. DECL_FUNCTION(char*, jack_get_client_name, (jack_client_t *client), (client));

  87. DECL_FUNCTION(int, jack_internal_client_new, (const char *client_name,

  88.                                             const char *load_name,

  89.                                             const char *load_init), (client_name, load_name, load_init));

  90. DECL_VOID_FUNCTION(jack_internal_client_close, (const char *client_name), (client_name));

  91. DECL_FUNCTION(int, jack_is_realtime, (jack_client_t *client), (client));

  92. DECL_VOID_FUNCTION(jack_on_shutdown, (jack_client_t *client, JackShutdownCallback shutdown_callback, void *arg), (client, function, arg));

  93. DECL_FUNCTION(int, jack_set_process_callback, (jack_client_t *client,

  94.                                             JackProcessCallback process_callback,

  95.                                             void *arg), (client, process_callback, arg));

  96. DECL_FUNCTION(jack_nframes_t, jack_thread_wait, (jack_client_t *client, int status), (client, status));      

  97.                                       

  98. //

  99. DECL_FUNCTION(jack_nframes_t, jack_cycle_wait, (jack_client_t *client), (client));   

  100. DECL_VOID_FUNCTION(jack_cycle_signal, (jack_client_t *client, , int status), (client, status));                                          

  101. DECL_FUNCTION(int, jack_set_process_thread, (jack_client_t *client,

  102.                                             JackThreadCallback fun,

  103.                                             void *arg), (client, fun, arg));

  104. DECL_FUNCTION(int, jack_set_thread_init_callback, (jack_client_t *client,

  105.                                             JackThreadInitCallback thread_init_callback,

  106.                                             void *arg), (client, thread_init_callback, arg));

  107. DECL_FUNCTION(int, jack_set_freewheel_callback, (jack_client_t *client,

  108.                                             JackFreewheelCallback freewheel_callback,

  109.                                             void *arg), (client, freewheel_callback, arg));

  110. DECL_FUNCTION(int, jack_set_freewheel, (jack_client_t *client, int onoff), (client, onoff));   

  111. DECL_FUNCTION(int, jack_set_buffer_size, (jack_client_t *client, jack_nframes_t nframes), (client, nframes));   

  112. DECL_FUNCTION(int, jack_set_buffer_size_callback, (jack_client_t *client,

  113.                                             JackBufferSizeCallback bufsize_callback,

  114.                                             void *arg), (client, bufsize_callback, arg));

  115. DECL_FUNCTION(int, jack_set_sample_rate_callback, (jack_client_t *client,

  116.                                             JackSampleRateCallback srate_callback,

  117.                                             void *arg), (client, srate_callback, arg));

  118. DECL_FUNCTION(int, jack_set_client_registration_callback, (jack_client_t *client,

  119.                                             JackClientRegistrationCallback registration_callback,

  120.                                             void *arg), (client, registration_callback, arg));

  121. DECL_FUNCTION(int, jack_set_port_registration_callback, (jack_client_t *client,

  122.                                             JackPortRegistrationCallback registration_callback,

  123.                                             void *arg), (client, registration_callback, arg));

  124. DECL_FUNCTION(int, jack_set_port_connect_callback, (jack_client_t *client,

  125.                                             JackPortConnectCallback connect_callback,

  126.                                             void *arg), (client, connect_callback, arg));

  127. DECL_FUNCTION(int, jack_set_port_rename_callback, (jack_client_t *client,

  128.                                             JackPortRenameCallback rename_callback,

  129.                                             void *arg), (client, rename_callback, arg));

  130. DECL_FUNCTION(int, jack_set_graph_order_callback, (jack_client_t *client,

  131.                                             JackGraphOrderCallback graph_callback,

  132.                                             void *arg), (client, graph_callback, arg));

  133. DECL_FUNCTION(int, jack_set_xrun_callback, (jack_client_t *client,

  134.                                             JackXRunCallback xrun_callback,

  135.                                             void *arg), (client, xrun_callback, arg));

  136. DECL_FUNCTION(int, jack_activate, (jack_client_t *client), (client));

  137. DECL_FUNCTION(int, jack_deactivate, (jack_client_t *client), (client));

  138. DECL_FUNCTION(jack_port_t *, jack_port_register, (jack_client_t *client, const char *port_name, const char *port_type,

  139.                                                   unsigned long flags, unsigned long buffer_size),

  140.               (client, port_name, port_type, flags, buffer_size));

  141. DECL_FUNCTION(int, jack_port_unregister, (jack_client_t *client, jack_port_t* port), (client, port));

  142. DECL_FUNCTION(void *, jack_port_get_buffer, (jack_port_t *port, jack_nframes_t nframes), (port, nframes));

  143. DECL_FUNCTION(const char*, jack_port_name, (const jack_port_t *port), (port));

  144. DECL_FUNCTION(const char*, jack_port_short_name, (const jack_port_t *port), (port));

  145. DECL_FUNCTION(int, jack_port_flags, (const jack_port_t *port), (port));

  146. DECL_FUNCTION(const char*, jack_port_type, (const jack_port_t *port), (port));

  147. DECL_FUNCTION(jack_port_type_id_t, jack_port_type_id, (const jack_port_t *port), (port));

  148. DECL_FUNCTION(int, jack_port_is_mine, (const jack_client_t *client, const jack_port_t* port), (client, port));

  149. DECL_FUNCTION(int, jack_port_connected, (const jack_port_t *port), (port));

  150. DECL_FUNCTION(int, jack_port_connected_to, (const jack_port_t *port, const char *port_name), (port, port_name));

  151. DECL_FUNCTION(const char**, jack_port_get_connections, (const jack_port_t *port), (port));

  152. DECL_FUNCTION(const char**, jack_port_get_all_connections, (const jack_port_t *port), (port));

  153. DECL_FUNCTION(int, jack_port_tie, (jack_port_t *src, jack_port_t *dst), (src, dst));

  154. DECL_FUNCTION(int, jack_port_untie, (jack_port_t *port), (port));

  155. 

  156. 

  157. DECL_FUNCTION(jack_nframes_t, jack_get_buffer_size, (jack_client_t *client), (client));

  158. DECL_FUNCTION(jack_nframes_t, jack_get_sample_rate, (jack_client_t *client), (client));

  159. DECL_FUNCTION(jack_nframes_t, jack_port_get_total_latency, (jack_client_t *client, jack_port_t *port), (client, port));

  160. DECL_VOID_FUNCTION(jack_set_error_function, (void (*func)(const char *)), (func));

  161. 

  162. 

  163. DECL_FUNCTION(const char**, jack_get_ports, (jack_client_t *client, const char *port_name_pattern, const char *	type_name_pattern,

  164.                                              unsigned long flags), (client, port_name_pattern, type_name_pattern, flags));

  165. DECL_FUNCTION(int, jack_connect, (jack_client_t *client, const char *source_port, const char *destination_port), (client, source_port, destination_port));

  166. DECL_FUNCTION(int, jack_set_port_connect_callback, (jack_client_t *client, JackPortConnectCallback connect_callback, void *arg),

  167.               (client, connect_callback, arg));

  168. DECL_FUNCTION(jack_port_t *, jack_port_by_id, (jack_client_t *client, jack_port_id_t port_id), (client, port_id));