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183 lines
4.4 KiB
183 lines
4.4 KiB
/*
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The mediastreamer library aims at providing modular media processing and I/O
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for linphone, but also for any telephony application.
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Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "msread.h"
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#include "mssync.h"
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <string.h>
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#include <errno.h>
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static MSReadClass *ms_read_class=NULL;
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MSFilter * ms_read_new(char *name)
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{
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MSRead *r;
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int fd=-1;
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r=g_new(MSRead,1);
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ms_read_init(r);
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if (ms_read_class==NULL)
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{
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ms_read_class=g_new(MSReadClass,1);
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ms_read_class_init(ms_read_class);
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}
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MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_read_class);
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r->fd=-1;
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if (name!=NULL) ms_read_open(r,name);
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return(MS_FILTER(r));
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}
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gint ms_read_open(MSRead *r, gchar *name)
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{
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gint fd;
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fd=open(name,O_RDONLY);
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if (fd<0) {
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r->fd=-1;
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g_warning("ms_read_new: cannot open %s : %s",name,strerror(errno));
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return -1;
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}
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r->fd=fd;
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if (strstr(name,".wav")!=NULL){
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/* skip the header */
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lseek(fd,20,SEEK_SET);
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#ifdef WORDS_BIGENDIAN
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r->need_swap=1;
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#else
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r->need_swap=0;
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#endif
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}
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r->state=MS_READ_STATE_STARTED;
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return 0;
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}
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/* FOR INTERNAL USE*/
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void ms_read_init(MSRead *r)
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{
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ms_filter_init(MS_FILTER(r));
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MS_FILTER(r)->outfifos=r->foutputs;
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MS_FILTER(r)->outqueues=r->qoutputs;
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memset(r->foutputs,0,sizeof(MSFifo*)*MSREAD_MAX_OUTPUTS);
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memset(r->qoutputs,0,sizeof(MSQueue*)*MSREAD_MAX_OUTPUTS);
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r->fd=-1;
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r->gran=320;
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r->state=MS_READ_STATE_STOPPED;
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r->need_swap=0;
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r->rate=8000;
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}
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gint ms_read_set_property(MSRead *f,MSFilterProperty prop, void *value)
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{
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switch(prop){
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case MS_FILTER_PROPERTY_FREQ:
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f->rate=((gint*)value)[0];
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break;
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}
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return 0;
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}
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void ms_read_class_init(MSReadClass *klass)
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{
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ms_filter_class_init(MS_FILTER_CLASS(klass));
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ms_filter_class_set_name(MS_FILTER_CLASS(klass),"dskreader");
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ms_filter_class_set_attr(MS_FILTER_CLASS(klass),FILTER_IS_SOURCE);
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MS_FILTER_CLASS(klass)->max_foutputs=MSREAD_MAX_OUTPUTS;
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MS_FILTER_CLASS(klass)->max_qoutputs=MSREAD_MAX_OUTPUTS;
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MS_FILTER_CLASS(klass)->w_maxgran=MSREAD_DEF_GRAN;
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MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_read_destroy;
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MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_read_setup;
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MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_read_process;
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MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_read_set_property;
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}
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void ms_read_process(MSRead *r)
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{
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MSFifo *f;
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MSQueue *q;
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MSMessage *msg=NULL;
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int err;
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gint gran=r->gran;
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void *p;
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f=r->foutputs[0];
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if ((f!=NULL) && (r->state==MS_READ_STATE_STARTED))
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{
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ms_fifo_get_write_ptr(f,gran,&p);
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if (p!=NULL)
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{
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err=read(r->fd,p,gran);
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if (err<0)
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{
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/* temp: */
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g_warning("ms_read_process: failed to read: %s.\n",strerror(errno));
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}
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else if (err<gran){
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ms_trace("ms_read_process: end of file.");
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ms_filter_notify_event(MS_FILTER(r),MS_READ_EVENT_EOF,NULL);
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r->state=MS_READ_STATE_STOPPED;
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close(r->fd);
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r->fd=-1;
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}
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if (r->need_swap) swap_buffer(p,gran);
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}
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}
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/* process output queues*/
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q=r->qoutputs[0];
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if ((q!=NULL) && (r->fd>0))
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{
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msg=ms_message_new(r->gran);
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err=read(r->fd,msg->data,r->gran);
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if (err>0){
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msg->size=err;
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ms_queue_put(q,msg);
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if (r->need_swap) swap_buffer(msg->data,r->gran);
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}else{
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ms_filter_notify_event(MS_FILTER(r),MS_READ_EVENT_EOF,NULL);
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ms_trace("End of file reached.");
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r->state=MS_READ_STATE_STOPPED;
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}
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}
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}
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void ms_read_destroy( MSRead *obj)
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{
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if (obj->fd!=0) close(obj->fd);
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g_free(obj);
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}
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gint ms_read_close(MSRead *obj)
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{
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if (obj->fd!=0) {
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close(obj->fd);
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obj->fd=-1;
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obj->state=MS_READ_STATE_STOPPED;
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}
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}
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void ms_read_setup(MSRead *r, MSSync *sync)
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{
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r->sync=sync;
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r->gran=(r->rate*sync->interval/1000)*2;
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}
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