configure&avdevice/jack: Fixed issue #43 JACK indev support on OSX

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

configure

@@ -1732,6 +1732,7 @@ BUILTIN_LIST="
     mm_empty
     rdtsc
     sarestart
+    sem_timedwait
     sync_val_compare_and_swap
 "
 HAVE_LIST_CMDLINE="
@@ -1753,6 +1754,7 @@ HEADERS_LIST="
     asm_types_h
     cdio_paranoia_h
     cdio_paranoia_paranoia_h
+    dispatch_dispatch_h
     dev_bktr_ioctl_bt848_h
     dev_bktr_ioctl_meteor_h
     dev_ic_bt8xx_h
@@ -2758,7 +2760,8 @@ gdigrab_indev_deps="CreateDIBSection"
 gdigrab_indev_extralibs="-lgdi32"
 gdigrab_indev_select="bmp_decoder"
 iec61883_indev_deps="libiec61883"
-jack_indev_deps="jack_jack_h sem_timedwait"
+jack_indev_deps="jack_jack_h"
+jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
 lavfi_indev_deps="avfilter"
 libcdio_indev_deps="libcdio"
 libdc1394_indev_deps="libdc1394"
@@ -5267,6 +5270,7 @@ check_builtin atomic_compare_exchange "" "int *ptr, *oldval; int newval; __atomi
 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
 check_builtin sarestart signal.h "SA_RESTART"
+check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" -lpthread
 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
 check_builtin gmtime_r time.h "time_t *time; struct tm *tm; gmtime_r(time, tm)"
 check_builtin localtime_r time.h "time_t *time; struct tm *tm; localtime_r(time, tm)"
@@ -5331,6 +5335,7 @@ check_func_headers glob.h glob
 enabled xlib &&
     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
 
+check_header dispatch/dispatch.h
 check_header direct.h
 check_header dirent.h
 check_header dlfcn.h
@@ -5703,7 +5708,7 @@ check_header soundcard.h
 enabled_any alsa_indev alsa_outdev &&
     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
 
-enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack && check_func sem_timedwait &&
+enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
     check_func jack_port_get_latency_range -ljack
 
 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio

libavdevice/jack.c

@@ -35,6 +35,16 @@
 #include "timefilter.h"
 #include "avdevice.h"
 
+#if HAVE_DISPATCH_DISPATCH_H
+#include <dispatch/dispatch.h>
+#define sem_t dispatch_semaphore_t
+#define sem_init(psem,x,val)  *psem = dispatch_semaphore_create(val)
+#define sem_post(psem)                dispatch_semaphore_signal(*psem)
+#define sem_wait(psem)                dispatch_semaphore_wait(*psem, DISPATCH_TIME_FOREVER)
+#define sem_timedwait(psem, val)      dispatch_semaphore_wait(*psem, dispatch_walltime(val, 0))
+#define sem_destroy(psem)             dispatch_release(*psem)
+#endif
+
 /**
  * Size of the internal FIFO buffers as a number of audio packets
  */