comparison: src/mediastreamer/mssync.h
src/mediastreamer/mssync.h
- branch
- gaim
- changeset 20470
- 77693555855f
- parent 13071
- b98e72d4089a
- parent 20469
- b2836a24d81e
- child 20471
- 1966704b3e42
equal
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replaced
| 13071:b98e72d4089a | 20470:77693555855f |
|---|---|
| 1 /* | |
| 2 The mediastreamer library aims at providing modular media processing and I/O | |
| 3 for linphone, but also for any telephony application. | |
| 4 Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org | |
| 5 | |
| 6 This library is free software; you can redistribute it and/or | |
| 7 modify it under the terms of the GNU Lesser General Public | |
| 8 License as published by the Free Software Foundation; either | |
| 9 version 2.1 of the License, or (at your option) any later version. | |
| 10 | |
| 11 This library is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 Lesser General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU Lesser General Public | |
| 17 License along with this library; if not, write to the Free Software | |
| 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 */ | |
| 20 | |
| 21 #ifndef MS_SYNC_H | |
| 22 #define MS_SYNC_H | |
| 23 | |
| 24 | |
| 25 #include "msfilter.h" | |
| 26 | |
| 27 struct _MSSync | |
| 28 { | |
| 29 struct _MSSyncClass *klass; | |
| 30 GMutex *lock; | |
| 31 MSFilter **attached_filters; /* pointer to a table of pointer of filters*/ | |
| 32 GList *execution_list; /* the list of filters to be executed. This is filled with compilation */ | |
| 33 gint filters; /*number of filters attached to the sync */ | |
| 34 gint run; /* flag to indicate whether the sync must be run or not */ | |
| 35 GThread * thread; /* the thread ressource if this sync is run by a thread*/ | |
| 36 GCond *thread_cond; | |
| 37 GCond *stop_cond; | |
| 38 guint32 flags; | |
| 39 gint interval; /* in miliseconds*/ | |
| 40 #define MS_SYNC_NEED_UPDATE (0x0001) /* a modification has occured in the processing chains | |
| 41 attached to this sync; so the execution list has to be updated */ | |
| 42 guint samples_per_tick; /* number of bytes produced by sources of the processing chains*/ | |
| 43 guint32 ticks; | |
| 44 guint32 time; /* a time since the start of the sync expressed in milisec*/ | |
| 45 }; | |
| 46 | |
| 47 typedef struct _MSSync MSSync; | |
| 48 | |
| 49 typedef void (*MSSyncDestroyFunc)(MSSync*); | |
| 50 typedef void (*MSSyncSyncFunc)(MSSync*); | |
| 51 typedef int (*MSSyncAttachFunc)(MSSync*,MSFilter*); | |
| 52 typedef int (*MSSyncDetachFunc)(MSSync*,MSFilter*); | |
| 53 | |
| 54 typedef struct _MSSyncClass | |
| 55 { | |
| 56 gint max_filters; /* the maximum number of filters that can be attached to this sync*/ | |
| 57 MSSyncSyncFunc synchronize; | |
| 58 MSSyncDestroyFunc destroy; | |
| 59 MSSyncAttachFunc attach; | |
| 60 MSSyncDetachFunc detach; | |
| 61 } MSSyncClass; | |
| 62 | |
| 63 /* private */ | |
| 64 void ms_sync_init(MSSync *sync); | |
| 65 void ms_sync_class_init(MSSyncClass *klass); | |
| 66 | |
| 67 int ms_sync_attach_generic(MSSync *sync,MSFilter *f); | |
| 68 int ms_sync_detach_generic(MSSync *sync,MSFilter *f); | |
| 69 | |
| 70 /* public*/ | |
| 71 | |
| 72 #define MS_SYNC(sync) ((MSSync*)(sync)) | |
| 73 #define MS_SYNC_CLASS(klass) ((MSSyncClass*)(klass)) | |
| 74 | |
| 75 #define ms_sync_synchronize(_sync) \ | |
| 76 do \ | |
| 77 { \ | |
| 78 MSSync *__sync=_sync; \ | |
| 79 __sync->ticks++; \ | |
| 80 ((__sync)->klass->synchronize((__sync))); \ | |
| 81 }while(0) | |
| 82 | |
| 83 void ms_sync_setup(MSSync *sync); | |
| 84 | |
| 85 void ms_sync_unsetup(MSSync *sync); | |
| 86 | |
| 87 #define ms_sync_update(sync) (sync)->flags|=MS_SYNC_NEED_UPDATE | |
| 88 | |
| 89 #define ms_sync_get_samples_per_tick(sync) ((sync)->samples_per_tick) | |
| 90 | |
| 91 void ms_sync_set_samples_per_tick(MSSync *sync,gint size); | |
| 92 | |
| 93 #define ms_sync_get_tick_count(sync) ((sync)->ticks) | |
| 94 | |
| 95 #define ms_sync_suspend(sync) g_cond_wait((sync)->thread_cond,(sync)->lock) | |
| 96 | |
| 97 #define ms_sync_lock(sync) g_mutex_lock((sync)->lock) | |
| 98 | |
| 99 #define ms_sync_unlock(sync) g_mutex_unlock((sync)->lock) | |
| 100 | |
| 101 #define ms_sync_trylock(sync) g_mutex_trylock((sync)->lock) | |
| 102 | |
| 103 /** | |
| 104 * function_name:ms_sync_attach | |
| 105 * @sync: A #MSSync object. | |
| 106 * @f: A #MSFilter object. | |
| 107 * | |
| 108 * Attach a chain of filters to a synchronisation source. Filter @f must be the first filter of the processing chain. | |
| 109 * | |
| 110 * Returns: 0 if successfull, a negative value reprensenting the errno.h error. | |
| 111 */ | |
| 112 int ms_sync_attach(MSSync *sync,MSFilter *f); | |
| 113 | |
| 114 /** | |
| 115 * ms_sync_detach: | |
| 116 * @sync: A #MSSync object. | |
| 117 * @f: A #MSFilter object. | |
| 118 * | |
| 119 * Dettach a chain of filters to a synchronisation source. Filter @f must be the first filter of the processing chain. | |
| 120 * The processing chain will no more be executed. | |
| 121 * | |
| 122 * Returns: 0 if successfull, a negative value reprensenting the errno.h error. | |
| 123 */ | |
| 124 int ms_sync_detach(MSSync *sync,MSFilter *f); | |
| 125 | |
| 126 int ms_sync_uninit(MSSync *sync); | |
| 127 | |
| 128 #define ms_sync_start(sync) ms_start((sync)) | |
| 129 #define ms_sync_stop(sync) ms_stop((sync)) | |
| 130 | |
| 131 | |
| 132 /*destroy*/ | |
| 133 #define ms_sync_destroy(sync) (sync)->klass->destroy((sync)) | |
| 134 | |
| 135 | |
| 136 #endif |
