| /* |
| 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 "msread.h" |
| #include "mssync.h" |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| static MSReadClass *ms_read_class=NULL; |
| |
| MSFilter * ms_read_new(char *name) |
| { |
| MSRead *r; |
| int fd=-1; |
| |
| r=g_new(MSRead,1); |
| ms_read_init(r); |
| if (ms_read_class==NULL) |
| { |
| ms_read_class=g_new(MSReadClass,1); |
| ms_read_class_init(ms_read_class); |
| } |
| MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_read_class); |
| r->fd=-1; |
| if (name!=NULL) ms_read_open(r,name); |
| return(MS_FILTER(r)); |
| } |
| |
| |
| |
| gint ms_read_open(MSRead *r, gchar *name) |
| { |
| gint fd; |
| fd=open(name,O_RDONLY); |
| if (fd<0) { |
| r->fd=-1; |
| g_warning("ms_read_new: cannot open %s : %s",name,strerror(errno)); |
| return -1; |
| } |
| r->fd=fd; |
| if (strstr(name,".wav")!=NULL){ |
| /* skip the header */ |
| lseek(fd,20,SEEK_SET); |
| #ifdef WORDS_BIGENDIAN |
| r->need_swap=1; |
| #else |
| r->need_swap=0; |
| #endif |
| } |
| r->state=MS_READ_STATE_STARTED; |
| return 0; |
| } |
| |
| /* FOR INTERNAL USE*/ |
| void ms_read_init(MSRead *r) |
| { |
| ms_filter_init(MS_FILTER(r)); |
| MS_FILTER(r)->outfifos=r->foutputs; |
| MS_FILTER(r)->outqueues=r->qoutputs; |
| memset(r->foutputs,0,sizeof(MSFifo*)*MSREAD_MAX_OUTPUTS); |
| memset(r->qoutputs,0,sizeof(MSQueue*)*MSREAD_MAX_OUTPUTS); |
| r->fd=-1; |
| r->gran=320; |
| r->state=MS_READ_STATE_STOPPED; |
| r->need_swap=0; |
| r->rate=8000; |
| } |
| |
| gint ms_read_set_property(MSRead *f,MSFilterProperty prop, void *value) |
| { |
| switch(prop){ |
| case MS_FILTER_PROPERTY_FREQ: |
| f->rate=((gint*)value)[0]; |
| break; |
| } |
| return 0; |
| } |
| |
| void ms_read_class_init(MSReadClass *klass) |
| { |
| ms_filter_class_init(MS_FILTER_CLASS(klass)); |
| ms_filter_class_set_name(MS_FILTER_CLASS(klass),"dskreader"); |
| ms_filter_class_set_attr(MS_FILTER_CLASS(klass),FILTER_IS_SOURCE); |
| MS_FILTER_CLASS(klass)->max_foutputs=MSREAD_MAX_OUTPUTS; |
| MS_FILTER_CLASS(klass)->max_qoutputs=MSREAD_MAX_OUTPUTS; |
| MS_FILTER_CLASS(klass)->w_maxgran=MSREAD_DEF_GRAN; |
| MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_read_destroy; |
| MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_read_setup; |
| MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_read_process; |
| MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_read_set_property; |
| } |
| |
| void ms_read_process(MSRead *r) |
| { |
| MSFifo *f; |
| MSQueue *q; |
| MSMessage *msg=NULL; |
| int err; |
| gint gran=r->gran; |
| void *p; |
| |
| f=r->foutputs[0]; |
| if ((f!=NULL) && (r->state==MS_READ_STATE_STARTED)) |
| { |
| ms_fifo_get_write_ptr(f,gran,&p); |
| if (p!=NULL) |
| { |
| err=read(r->fd,p,gran); |
| if (err<0) |
| { |
| /* temp: */ |
| g_warning("ms_read_process: failed to read: %s.\n",strerror(errno)); |
| } |
| else if (err<gran){ |
| ms_trace("ms_read_process: end of file."); |
| ms_filter_notify_event(MS_FILTER(r),MS_READ_EVENT_EOF,NULL); |
| r->state=MS_READ_STATE_STOPPED; |
| close(r->fd); |
| r->fd=-1; |
| } |
| if (r->need_swap) swap_buffer(p,gran); |
| } |
| } |
| /* process output queues*/ |
| q=r->qoutputs[0]; |
| if ((q!=NULL) && (r->fd>0)) |
| { |
| msg=ms_message_new(r->gran); |
| err=read(r->fd,msg->data,r->gran); |
| if (err>0){ |
| msg->size=err; |
| ms_queue_put(q,msg); |
| if (r->need_swap) swap_buffer(msg->data,r->gran); |
| }else{ |
| ms_filter_notify_event(MS_FILTER(r),MS_READ_EVENT_EOF,NULL); |
| ms_trace("End of file reached."); |
| r->state=MS_READ_STATE_STOPPED; |
| } |
| } |
| } |
| |
| void ms_read_destroy( MSRead *obj) |
| { |
| if (obj->fd!=0) close(obj->fd); |
| g_free(obj); |
| } |
| |
| gint ms_read_close(MSRead *obj) |
| { |
| if (obj->fd!=0) { |
| close(obj->fd); |
| obj->fd=-1; |
| obj->state=MS_READ_STATE_STOPPED; |
| } |
| } |
| |
| |
| void ms_read_setup(MSRead *r, MSSync *sync) |
| { |
| r->sync=sync; |
| r->gran=(r->rate*sync->interval/1000)*2; |
| } |