501 lines
17 KiB
C
501 lines
17 KiB
C
/* runtime/weak dynamic JACK linking
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*
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* (C) 2014 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "weak_libjack.h"
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#ifndef USE_WEAK_JACK
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int have_libjack (void) {
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return 0;
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}
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#else
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#ifdef PLATFORM_WINDOWS
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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#include <jack/jack.h>
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#include <jack/ringbuffer.h>
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#include <jack/transport.h>
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#include <jack/midiport.h>
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#include <jack/session.h>
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#include <jack/thread.h>
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static void* lib_open(const char* const so) {
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#ifdef PLATFORM_WINDOWS
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return (void*) LoadLibraryA(so);
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#else
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return dlopen(so, RTLD_NOW|RTLD_LOCAL);
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#endif
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}
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static void* lib_symbol(void* const lib, const char* const sym) {
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#ifdef PLATFORM_WINDOWS
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return (void*) GetProcAddress((HMODULE)lib, sym);
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#else
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return dlsym(lib, sym);
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#endif
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}
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#ifdef COMPILER_MSVC
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typedef void * pvoid_t;
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#define MAPSYM(SYM, FAIL) _j._ ## SYM = lib_symbol(lib, "jack_" # SYM); \
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if (!_j._ ## SYM) err |= FAIL;
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#else
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typedef void * __attribute__ ((__may_alias__)) pvoid_t;
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#define MAPSYM(SYM, FAIL) *(pvoid_t *)(&_j._ ## SYM) = lib_symbol(lib, "jack_" # SYM); \
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if (!_j._ ## SYM) err |= FAIL;
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#endif
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typedef void (* func_t) (void);
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/* function pointers to the real jack API */
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static struct WeakJack {
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func_t _client_open;
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func_t _client_close;
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func_t _get_client_name;
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func_t _get_buffer_size;
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func_t _get_sample_rate;
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func_t _frames_since_cycle_start;
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func_t _frame_time;
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func_t _last_frame_time;
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func_t _cpu_load;
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func_t _is_realtime;
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func_t _set_freewheel;
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func_t _set_buffer_size;
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func_t _on_shutdown;
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func_t _on_info_shutdown;
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func_t _set_process_callback;
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func_t _set_freewheel_callback;
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func_t _set_buffer_size_callback;
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func_t _set_sample_rate_callback;
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func_t _set_port_registration_callback;
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func_t _set_port_connect_callback;
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func_t _set_graph_order_callback;
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func_t _set_xrun_callback;
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func_t _set_latency_callback;
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func_t _set_error_function;
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func_t _activate;
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func_t _deactivate;
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func_t _recompute_total_latencies;
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func_t _port_get_total_latency;
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func_t _port_get_latency_range;
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func_t _port_set_latency_range;
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func_t _port_get_buffer;
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func_t _port_request_monitor;
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func_t _port_ensure_monitor;
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func_t _port_monitoring_input;
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func_t _port_name;
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func_t _port_flags;
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func_t _get_ports;
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func_t _port_name_size;
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func_t _port_type_size;
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func_t _port_type_get_buffer_size;
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func_t _port_by_name;
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func_t _port_by_id;
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func_t _port_register;
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func_t _port_unregister;
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func_t _port_type;
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func_t _port_get_connections;
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func_t _port_get_all_connections;
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func_t _port_set_name;
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func_t _port_disconnect;
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func_t _connect;
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func_t _disconnect;
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func_t _free;
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func_t _cycle_wait;
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func_t _cycle_signal;
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func_t _set_process_thread;
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func_t _set_thread_init_callback;
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func_t _get_current_transport_frame;
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func_t _transport_locate;
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func_t _transport_start;
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func_t _transport_stop;
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func_t _transport_query;
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func_t _set_sync_callback;
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func_t _set_timebase_callback;
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func_t _release_timebase;
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func_t _midi_get_event_count;
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func_t _midi_event_get;
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func_t _midi_event_write;
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func_t _midi_clear_buffer;
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func_t _set_session_callback;
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func_t _session_reply;
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func_t _session_event_free;
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func_t _ringbuffer_create;
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func_t _ringbuffer_free;
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func_t _ringbuffer_reset;
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func_t _ringbuffer_read_advance;
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func_t _ringbuffer_write_advance;
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func_t _ringbuffer_read_space;
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func_t _ringbuffer_write_space;
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func_t _ringbuffer_read;
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func_t _ringbuffer_write;
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func_t _ringbuffer_mlock;
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func_t _client_real_time_priority;
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func_t _client_max_real_time_priority;
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func_t _acquire_real_time_scheduling;
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func_t _drop_real_time_scheduling;
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func_t _client_stop_thread;
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func_t _client_kill_thread;
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func_t _client_create_thread;
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} _j;
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static int _status = -1;
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int have_libjack (void) {
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return _status;
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}
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__attribute__((constructor))
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static void init_weak_jack(void)
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{
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void* lib;
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int err = 0;
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memset(&_j, 0, sizeof(_j));
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#ifdef __APPLE__
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lib = lib_open("libjack.dylib");
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if (!lib) {
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lib = lib_open("/usr/local/lib/libjack.dylib");
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}
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#elif (defined PLATFORM_WINDOWS)
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# ifdef __x86_64__
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lib = lib_open("libjack64.dll");
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# else
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lib = lib_open("libjack.dll");
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# endif
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#else
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lib = lib_open("libjack.so.0");
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#endif
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if (!lib) {
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_status = -2;
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return;
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}
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MAPSYM(client_open, 2)
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MAPSYM(client_close, 1)
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MAPSYM(get_client_name, 1)
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MAPSYM(get_sample_rate, 1)
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MAPSYM(get_buffer_size, 1)
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MAPSYM(frames_since_cycle_start, 1)
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MAPSYM(frame_time, 1)
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MAPSYM(last_frame_time, 1)
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MAPSYM(cpu_load, 1)
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MAPSYM(is_realtime, 1)
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MAPSYM(set_freewheel, 1)
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MAPSYM(set_buffer_size, 1)
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MAPSYM(on_shutdown, 0)
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MAPSYM(on_info_shutdown, 0)
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MAPSYM(set_process_callback, 1)
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MAPSYM(set_freewheel_callback, 1)
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MAPSYM(set_buffer_size_callback, 1)
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MAPSYM(set_sample_rate_callback, 1)
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MAPSYM(set_port_registration_callback, 1)
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MAPSYM(set_port_connect_callback, 1)
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MAPSYM(set_graph_order_callback, 1)
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MAPSYM(set_xrun_callback, 1)
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MAPSYM(set_latency_callback, 1)
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MAPSYM(set_error_function, 1)
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MAPSYM(activate, 1)
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MAPSYM(deactivate, 1)
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MAPSYM(recompute_total_latencies, 0)
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MAPSYM(port_get_total_latency, 0)
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MAPSYM(port_get_latency_range, 0)
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MAPSYM(port_set_latency_range, 0)
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MAPSYM(port_get_buffer, 1)
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MAPSYM(port_request_monitor, 1)
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MAPSYM(port_ensure_monitor, 1)
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MAPSYM(port_monitoring_input, 1)
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MAPSYM(port_name, 1)
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MAPSYM(port_flags, 1)
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MAPSYM(get_ports, 1)
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MAPSYM(port_name_size, 1)
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MAPSYM(port_type_size, 1)
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MAPSYM(port_type_get_buffer_size, 1)
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MAPSYM(port_by_name, 1)
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MAPSYM(port_by_id, 1)
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MAPSYM(port_register, 1)
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MAPSYM(port_unregister, 1)
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MAPSYM(port_type, 1)
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MAPSYM(port_get_connections, 1)
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MAPSYM(port_get_all_connections, 1)
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MAPSYM(port_set_name, 1)
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MAPSYM(port_disconnect, 1)
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MAPSYM(connect, 1)
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MAPSYM(disconnect, 1)
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MAPSYM(free, 0)
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MAPSYM(cycle_wait, 0)
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MAPSYM(cycle_signal, 0)
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MAPSYM(set_process_thread, 0)
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MAPSYM(set_thread_init_callback, 0)
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MAPSYM(get_current_transport_frame, 1)
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MAPSYM(transport_locate, 1)
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MAPSYM(transport_start, 1)
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MAPSYM(transport_stop, 1)
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MAPSYM(transport_query, 1)
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MAPSYM(set_sync_callback, 1)
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MAPSYM(set_timebase_callback, 1)
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MAPSYM(release_timebase, 1)
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MAPSYM(midi_get_event_count, 1)
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MAPSYM(midi_event_get, 1)
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MAPSYM(midi_event_write, 1)
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MAPSYM(midi_clear_buffer, 1)
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MAPSYM(set_session_callback, 0)
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MAPSYM(session_reply, 0)
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MAPSYM(session_event_free, 0)
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MAPSYM(ringbuffer_create, 1)
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MAPSYM(ringbuffer_free, 1)
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MAPSYM(ringbuffer_reset, 1)
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MAPSYM(ringbuffer_read_advance, 1)
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MAPSYM(ringbuffer_write_advance, 1)
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MAPSYM(ringbuffer_read_space, 1)
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MAPSYM(ringbuffer_write_space, 1)
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MAPSYM(ringbuffer_read, 1)
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MAPSYM(ringbuffer_write, 1)
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MAPSYM(ringbuffer_mlock, 0)
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MAPSYM(client_real_time_priority, 0)
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MAPSYM(client_max_real_time_priority, 0)
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MAPSYM(acquire_real_time_scheduling, 0)
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MAPSYM(client_create_thread, 0)
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MAPSYM(drop_real_time_scheduling, 0)
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MAPSYM(client_stop_thread, 0)
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MAPSYM(client_kill_thread, 0)
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/* if a required symbol is not found, disable JACK completly */
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if (err) {
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_j._client_open = NULL;
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}
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_status = err;
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}
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/*******************************************************************************
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* Macros to wrap jack API
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*/
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#ifndef NDEBUG
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# define WJACK_WARNING(NAME) \
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fprintf(stderr, "*** WEAK-JACK: function 'jack_%s' ignored\n", "" # NAME);
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#else
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# define WJACK_WARNING(NAME) ;
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#endif
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/* abstraction for jack_client functions */
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#define JCFUN(RTYPE, NAME, RVAL) \
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RTYPE WJACK_ ## NAME (jack_client_t *client) { \
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if (_j._ ## NAME) { \
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return ((RTYPE (*)(jack_client_t *client)) _j._ ## NAME)(client); \
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} else { \
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WJACK_WARNING(NAME) \
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return RVAL; \
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} \
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}
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/* abstraction for NOOP functions */
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#define JPFUN(RTYPE, NAME, DEF, ARGS, RVAL) \
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RTYPE WJACK_ ## NAME DEF { \
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if (_j._ ## NAME) { \
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return ((RTYPE (*)DEF) _j._ ## NAME) ARGS; \
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} else { \
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WJACK_WARNING(NAME) \
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return RVAL; \
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} \
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}
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/* abstraction for functions with return-value-pointer args */
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#define JXFUN(RTYPE, NAME, DEF, ARGS, CODE) \
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RTYPE WJACK_ ## NAME DEF { \
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if (_j._ ## NAME) { \
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return ((RTYPE (*)DEF) _j._ ## NAME) ARGS; \
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} else { \
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WJACK_WARNING(NAME) \
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CODE \
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} \
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}
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/* abstraction for void functions with return-value-pointer args */
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#define JVFUN(RTYPE, NAME, DEF, ARGS, CODE) \
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RTYPE WJACK_ ## NAME DEF { \
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if (_j._ ## NAME) { \
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((RTYPE (*)DEF) _j._ ## NAME) ARGS; \
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} else { \
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WJACK_WARNING(NAME) \
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CODE \
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} \
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}
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/******************************************************************************
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* wrapper functions.
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*
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* if a function pointer is set in the static struct WeakJack _j,
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* call the function, if not a dummy NOOP implementation is provided.
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*
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* The latter is mainly for the benefit for compile-time (warnings),
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* if libjack is not found, jack_client_open() will fail and none
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* of the application will never call any of the other functions.
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*/
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/* <jack/jack.h> */
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/* expand ellipsis for jack-session */
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jack_client_t * WJACK_client_open2 (const char *client_name, jack_options_t options, jack_status_t *status, const char *uuid) {
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if (_j._client_open) {
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return ((jack_client_t* (*)(const char *, jack_options_t, jack_status_t *, ...))(_j._client_open))(client_name, options, status, uuid);
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} else {
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WJACK_WARNING(client_open);
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if (status) *status = 0;
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return NULL;
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}
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}
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jack_client_t * WJACK_client_open1 (const char *client_name, jack_options_t options, jack_status_t *status) {
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if (_j._client_open) {
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return ((jack_client_t* (*)(const char *, jack_options_t, jack_status_t *, ...))_j._client_open)(client_name, options, status);
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} else {
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WJACK_WARNING(client_open);
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if (status) *status = 0;
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return NULL;
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}
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}
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JCFUN(int, client_close, 0)
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JCFUN(char*, get_client_name, NULL)
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JVFUN(void, on_shutdown, (jack_client_t *c, JackShutdownCallback s, void *a), (c,s,a),)
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JVFUN(void, on_info_shutdown, (jack_client_t *c, JackInfoShutdownCallback s, void *a), (c,s,a),)
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JPFUN(int, set_process_callback, (jack_client_t *c, JackProcessCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_freewheel_callback, (jack_client_t *c, JackFreewheelCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_buffer_size_callback, (jack_client_t *c, JackBufferSizeCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_sample_rate_callback, (jack_client_t *c, JackSampleRateCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_port_registration_callback, (jack_client_t *c, JackPortRegistrationCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_port_connect_callback, (jack_client_t *c, JackPortConnectCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_graph_order_callback, (jack_client_t *c, JackGraphOrderCallback g, void *a), (c,g,a), -1)
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JPFUN(int, set_xrun_callback, (jack_client_t *c, JackXRunCallback g, void *a), (c,g,a), -1)
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JPFUN(int, set_latency_callback, (jack_client_t *c, JackLatencyCallback g, void *a), (c,g,a), -1)
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JVFUN(void, set_error_function, (void (*f)(const char *)), (f),)
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JCFUN(int, activate, -1)
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JCFUN(int, deactivate, -1)
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JCFUN(jack_nframes_t, get_sample_rate, 0)
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JCFUN(jack_nframes_t, get_buffer_size, 0)
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JPFUN(jack_nframes_t, frames_since_cycle_start, (const jack_client_t *c), (c), 0)
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JPFUN(jack_nframes_t, frame_time, (const jack_client_t *c), (c), 0)
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JPFUN(jack_nframes_t, last_frame_time, (const jack_client_t *c), (c), 0)
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JCFUN(float, cpu_load, 0)
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JCFUN(int, is_realtime, 0)
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JPFUN(int, set_freewheel, (jack_client_t *c, int o), (c,o), 0)
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JPFUN(int, set_buffer_size, (jack_client_t *c, jack_nframes_t b), (c,b), 0)
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JCFUN(int, recompute_total_latencies, 0)
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JPFUN(jack_nframes_t, port_get_total_latency, (jack_client_t *c, jack_port_t *p), (c,p), 0)
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JVFUN(void, port_get_latency_range, (jack_port_t *p, jack_latency_callback_mode_t m, jack_latency_range_t *r), (p,m,r), if (r) {r->min = r->max = 0;})
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JVFUN(void, port_set_latency_range, (jack_port_t *p, jack_latency_callback_mode_t m, jack_latency_range_t *r), (p,m,r),)
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JPFUN(void*, port_get_buffer, (jack_port_t *p, jack_nframes_t n), (p,n), NULL)
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JPFUN(int, port_request_monitor, (jack_port_t *p, int o), (p,o), 0)
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JPFUN(int, port_ensure_monitor, (jack_port_t *p, int o), (p,o), 0)
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JPFUN(int, port_monitoring_input, (jack_port_t *p), (p), 0)
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JPFUN(const char*, port_name, (const jack_port_t *p), (p), NULL)
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JPFUN(int, port_flags, (const jack_port_t *p), (p), 0)
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JPFUN(const char**, get_ports,(jack_client_t *c, const char *p, const char *t, unsigned long f), (c,p,t,f), NULL)
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JPFUN(int, port_name_size, (void), (), 0)
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JPFUN(int, port_type_size, (void), (), 0)
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JPFUN(size_t, port_type_get_buffer_size, (jack_client_t *c, const char *t), (c,t), 0)
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JPFUN(jack_port_t*, port_by_name, (jack_client_t *c, const char *n), (c,n), NULL)
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JPFUN(jack_port_t*, port_by_id, (jack_client_t *c, jack_port_id_t i), (c,i), NULL)
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JPFUN(jack_port_t*, port_register, (jack_client_t *c, const char *n, const char *t, unsigned long f, unsigned long b), (c,n,t,f,b), NULL)
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JPFUN(int, port_unregister, (jack_client_t *c, jack_port_t *p), (c,p), 0)
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JPFUN(const char *, port_type, (const jack_port_t *p), (p), 0)
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JPFUN(const char **, port_get_connections, (const jack_port_t *p), (p), 0)
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JPFUN(const char **, port_get_all_connections, (const jack_client_t *c, const jack_port_t *p), (c,p), 0)
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JPFUN(int, port_set_name, (jack_port_t *p, const char *n), (p,n), 0)
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JPFUN(int, port_disconnect, (jack_client_t *c, jack_port_t *p), (c,p), 0)
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JPFUN(int, connect, (jack_client_t *c, const char *s, const char *d), (c,s,d), -1)
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JPFUN(int, disconnect, (jack_client_t *c, const char *s, const char *d), (c,s,d), -1)
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JVFUN(void, free, (void *p), (p), free(p);)
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JCFUN(jack_nframes_t, cycle_wait, 0)
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JVFUN(void, cycle_signal, (jack_client_t *c, int s), (c,s),)
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JPFUN(int, set_process_thread, (jack_client_t *c, JackThreadCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_thread_init_callback, (jack_client_t *c, JackThreadInitCallback p, void *a), (c,p,a), -1)
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JPFUN(int, transport_locate, (jack_client_t *c, jack_nframes_t f), (c,f), 0)
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JVFUN(void, transport_start, (jack_client_t *c), (c),)
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JVFUN(void, transport_stop, (jack_client_t *c), (c),)
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JPFUN(jack_nframes_t, get_current_transport_frame, (const jack_client_t *c), (c), 0)
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JXFUN(jack_transport_state_t, transport_query, (const jack_client_t *c, jack_position_t *p), (c,p), memset(p, 0, sizeof(jack_position_t)); return 0;)
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JPFUN(int, set_sync_callback, (jack_client_t *c, JackSyncCallback p, void *a), (c,p,a), -1)
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JPFUN(int, set_timebase_callback, (jack_client_t *c, int l, JackTimebaseCallback p, void *a), (c,l,p,a), -1)
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JCFUN(int, release_timebase, 0)
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/* <jack/midiport.h> */
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JPFUN(uint32_t, midi_get_event_count, (void* p), (p), 0)
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JPFUN(int, midi_event_get, (jack_midi_event_t *e, void *p, uint32_t i), (e,p,i), -1)
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JPFUN(int, midi_event_write, (void *b, jack_nframes_t t, const jack_midi_data_t *d, size_t s), (b,t,d,s), -1)
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JVFUN(void, midi_clear_buffer, (void *b), (b),)
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/* <jack/session.h> */
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JPFUN(int, set_session_callback, (jack_client_t *c, JackSessionCallback s, void *a), (c,s,a), -1)
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JPFUN(int, session_reply, (jack_client_t *c, jack_session_event_t *e), (c,e), -1)
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JVFUN(void, session_event_free, (jack_session_event_t *e), (e), )
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/* <jack/ringbuffer.h> */
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JPFUN(jack_ringbuffer_t *, ringbuffer_create, (size_t s), (s), NULL)
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JVFUN(void, ringbuffer_free, (jack_ringbuffer_t *rb), (rb), )
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JVFUN(void, ringbuffer_reset, (jack_ringbuffer_t *rb), (rb), )
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JVFUN(void, ringbuffer_read_advance, (jack_ringbuffer_t *rb, size_t c), (rb,c), )
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JVFUN(void, ringbuffer_write_advance, (jack_ringbuffer_t *rb, size_t c), (rb,c), )
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JPFUN(size_t, ringbuffer_read_space, (const jack_ringbuffer_t *rb), (rb), 0)
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JPFUN(size_t, ringbuffer_write_space, (const jack_ringbuffer_t *rb), (rb), 0)
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JPFUN(size_t, ringbuffer_read, (jack_ringbuffer_t *rb, char *d, size_t c), (rb,d,c), 0)
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JPFUN(size_t, ringbuffer_write, (jack_ringbuffer_t *rb, const char *s, size_t c), (rb,s,c), 0)
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JPFUN(int, ringbuffer_mlock, (jack_ringbuffer_t *rb), (rb), 0)
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/* <jack/thread.h> */
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JCFUN(int, client_real_time_priority, 0)
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JCFUN(int, client_max_real_time_priority, 0)
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JPFUN(int, acquire_real_time_scheduling, (jack_native_thread_t t, int p), (t,p), 0)
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JPFUN(int, drop_real_time_scheduling, (jack_native_thread_t t), (t), 0)
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JPFUN(int, client_stop_thread, (jack_client_t* c, jack_native_thread_t t), (c,t), 0)
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JPFUN(int, client_kill_thread, (jack_client_t* c, jack_native_thread_t t), (c,t), 0)
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JPFUN(int, client_create_thread, \
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(jack_client_t* c, jack_native_thread_t *t, int p, int r, void *(*f)(void*), void *a), (c,t,p,r,f,a), 0)
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#endif
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