| /* |
| The mediastreamer library aims at providing modular media processing and I/O |
| for linphone, but also for any telephony application. |
| Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include "mssync.h" |
| #include <errno.h> |
| |
| /* TODO: |
| -define an uninit function that free the mutex |
| */ |
| |
| /** |
| * function_name:ms_sync_get_bytes_per_tick |
| * @sync: A #MSSync object. |
| * |
| * Returns the number of bytes per tick. This is a usefull information for sources, so |
| * that they can know how much data they must deliver each time they are called. |
| * |
| */ |
| |
| /* private */ |
| void ms_sync_init(MSSync *sync) |
| { |
| sync->klass=NULL; |
| sync->lock=g_mutex_new(); |
| sync->thread_cond=g_cond_new(); |
| sync->stop_cond=g_cond_new(); |
| sync->attached_filters=NULL; |
| sync->execution_list=NULL; |
| sync->filters=0; |
| sync->run=0; |
| sync->flags=0; |
| sync->samples_per_tick=0; |
| sync->ticks=0; |
| sync->time=0; |
| sync->thread=NULL; |
| } |
| |
| void ms_sync_class_init(MSSyncClass *klass) |
| { |
| klass->max_filters=0; |
| klass->synchronize=NULL; |
| klass->attach=ms_sync_attach_generic; |
| klass->detach=ms_sync_detach_generic; |
| klass->destroy=NULL; |
| } |
| |
| /* public*/ |
| |
| |
| /** |
| * ms_sync_attach: |
| * @sync: A #MSSync object. |
| * @f: A #MSFilter object. |
| * |
| * Attach a chain of filters to a synchronisation source @sync. Filter @f must be the first filter of the processing chain. |
| * In order to be run, each chain of filter must be attached to a synchronisation source, that will be responsible for scheduling |
| * the processing. Multiple chains can be attached to a single synchronisation. |
| * |
| * Returns: 0 if successfull, a negative value reprensenting the errno.h error. |
| */ |
| int ms_sync_attach(MSSync *sync,MSFilter *f) |
| { |
| gint err; |
| ms_sync_lock(sync); |
| err=sync->klass->attach(sync,f); |
| ms_sync_update(sync); |
| ms_sync_unlock(sync); |
| return(err); |
| } |
| |
| int ms_sync_attach_generic(MSSync *sync,MSFilter *f) |
| { |
| int i; |
| //printf("attr: %i\n",f->klass->attributes); |
| g_return_val_if_fail(f->klass->attributes & FILTER_IS_SOURCE,-EINVAL); |
| g_return_val_if_fail(sync->attached_filters!=NULL,-EFAULT); |
| |
| |
| /* find a free place to attach*/ |
| for (i=0;i<sync->klass->max_filters;i++) |
| { |
| if (sync->attached_filters[i]==NULL) |
| { |
| sync->attached_filters[i]=f; |
| sync->filters++; |
| ms_trace("Filter succesfully attached to sync."); |
| return 0; |
| } |
| } |
| g_warning("No more link on sync !"); |
| return(-EMLINK); |
| } |
| |
| /** |
| * ms_sync_detach: |
| * @sync: A #MSSync object. |
| * @f: A #MSFilter object. |
| * |
| * Dettach a chain of filters to a synchronisation source. Filter @f must be the first filter of the processing chain. |
| * The processing chain will no more be executed. |
| * |
| * Returns: 0 if successfull, a negative value reprensenting the errno.h error. |
| */ |
| int ms_sync_detach(MSSync *sync,MSFilter *f) |
| { |
| gint err; |
| ms_sync_lock(sync); |
| err=sync->klass->detach(sync,f); |
| ms_sync_update(sync); |
| ms_sync_unlock(sync); |
| return(err); |
| } |
| |
| int ms_sync_detach_generic(MSSync *sync,MSFilter *f) |
| { |
| int i; |
| g_return_val_if_fail(f->klass->attributes & FILTER_IS_SOURCE,-EINVAL); |
| g_return_val_if_fail(sync->attached_filters!=NULL,-EFAULT); |
| for (i=0;i<sync->filters;i++) |
| { |
| if (sync->attached_filters[i]==f) |
| { |
| sync->attached_filters[i]=NULL; |
| sync->filters--; |
| return 0; |
| } |
| } |
| return(-EMLINK); |
| } |
| |
| void ms_sync_set_samples_per_tick(MSSync *sync,gint size) |
| { |
| if (sync->samples_per_tick==0) |
| { |
| sync->samples_per_tick=size; |
| g_cond_signal(sync->thread_cond); |
| } |
| else sync->samples_per_tick=size; |
| } |
| |
| /* call the setup func of each filter attached to the graph */ |
| void ms_sync_setup(MSSync *sync) |
| { |
| GList *elem=sync->execution_list; |
| MSFilter *f; |
| while(elem!=NULL){ |
| f=(MSFilter*)elem->data; |
| if (f->klass->setup!=NULL){ |
| f->klass->setup(f,sync); |
| } |
| elem=g_list_next(elem); |
| } |
| } |
| |
| /* call the unsetup func of each filter attached to the graph */ |
| void ms_sync_unsetup(MSSync *sync) |
| { |
| GList *elem=sync->execution_list; |
| MSFilter *f; |
| while(elem!=NULL){ |
| f=(MSFilter*)elem->data; |
| if (f->klass->unsetup!=NULL){ |
| f->klass->unsetup(f,sync); |
| } |
| elem=g_list_next(elem); |
| } |
| } |
| |
| |
| int ms_sync_uninit(MSSync *sync) |
| { |
| g_mutex_free(sync->lock); |
| g_cond_free(sync->thread_cond); |
| g_cond_free(sync->stop_cond); |
| } |
| |