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/*
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 "msringplayer.h"
#include "mssync.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#include "waveheader.h"
#define WAVE_HEADER_OFFSET sizeof(wave_header_t)
enum { PLAY_RING, PLAY_SILENCE};
static int supported_freq[6]={8000,11025,16000,22050,32000,44100};
gint freq_is_supported(gint freq){
int i;
for (i=0;i<6;i++){
if (abs(supported_freq[i]-freq)<50) return supported_freq[i];
}
return 0;
}
static MSRingPlayerClass *ms_ring_player_class=NULL;
/**
* ms_ring_player_new:
* @name: The path to the 16-bit 8khz raw file to be played as a ring.
* @seconds: The number of seconds that separates two rings.
*
* Allocates a new MSRingPlayer object.
*
*
* Returns: a pointer the the object, NULL if name could not be open.
*/
MSFilter * ms_ring_player_new(char *name, gint seconds)
{
MSRingPlayer *r;
int fd=-1;
if ((name!=NULL) && (strlen(name)!=0))
{
fd=open(name,O_RDONLY);
if (fd<0)
{
g_warning("ms_ring_player_new: failed to open %s.\n",name);
return NULL;
}
}else {
g_warning("ms_ring_player_new: Bad file name");
return NULL;
}
r=g_new(MSRingPlayer,1);
ms_ring_player_init(r);
if (ms_ring_player_class==NULL)
{
ms_ring_player_class=g_new(MSRingPlayerClass,1);
ms_ring_player_class_init(ms_ring_player_class);
}
MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_ring_player_class);
r->fd=fd;
r->silence=seconds;
r->freq=8000;
if (strstr(name,".wav")!=NULL){
wave_header_t header;
int freq,freq2;
/* read the header */
read(fd,&header,sizeof(wave_header_t));
freq=wave_header_get_rate(&header);
if ((freq2=freq_is_supported(freq))>0){
r->freq=freq2;
}else {
g_warning("Unsupported sampling rate %i",freq);
r->freq=8000;
}
r->channel=wave_header_get_channel(&header);
lseek(fd,WAVE_HEADER_OFFSET,SEEK_SET);
#ifdef WORDS_BIGENDIAN
r->need_swap=1;
#else
r->need_swap=0;
#endif
}
ms_ring_player_set_property(r, MS_FILTER_PROPERTY_FREQ,&r->freq);
r->state=PLAY_RING;
return(MS_FILTER(r));
}
/* FOR INTERNAL USE*/
void ms_ring_player_init(MSRingPlayer *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*)*MS_RING_PLAYER_MAX_OUTPUTS);
memset(r->qoutputs,0,sizeof(MSQueue*)*MS_RING_PLAYER_MAX_OUTPUTS);
r->fd=-1;
r->current_pos=0;
r->need_swap=0;
r->sync=NULL;
}
gint ms_ring_player_set_property(MSRingPlayer *f,MSFilterProperty prop, void *value)
{
switch(prop){
case MS_FILTER_PROPERTY_FREQ:
f->rate=((gint*)value)[0]*2;
f->silence_bytes=f->silence*f->rate;
if (f->sync!=NULL)
f->gran=(f->rate*f->sync->interval/1000)*2;
break;
}
return 0;
}
gint ms_ring_player_get_property(MSRingPlayer *f,MSFilterProperty prop, void *value)
{
switch(prop){
case MS_FILTER_PROPERTY_FREQ:
((gint*)value)[0]=f->freq;
break;
case MS_FILTER_PROPERTY_CHANNELS:
((gint*)value)[0]=f->channel;
break;
}
return 0;
}
gint ms_ring_player_get_sample_freq(MSRingPlayer *obj){
return obj->freq;
}
void ms_ring_player_class_init(MSRingPlayerClass *klass)
{
ms_filter_class_init(MS_FILTER_CLASS(klass));
ms_filter_class_set_name(MS_FILTER_CLASS(klass),"ringplay");
ms_filter_class_set_attr(MS_FILTER_CLASS(klass),FILTER_IS_SOURCE);
MS_FILTER_CLASS(klass)->max_foutputs=MS_RING_PLAYER_MAX_OUTPUTS;
MS_FILTER_CLASS(klass)->max_qoutputs=MS_RING_PLAYER_MAX_OUTPUTS;
MS_FILTER_CLASS(klass)->w_maxgran=MS_RING_PLAYER_DEF_GRAN;
MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_ring_player_setup;
MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_ring_player_destroy;
MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_ring_player_process;
MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_ring_player_set_property;
MS_FILTER_CLASS(klass)->get_property=(MSFilterPropertyFunc)ms_ring_player_get_property;
}
void ms_ring_player_process(MSRingPlayer *r)
{
MSFifo *f;
gint err;
gint processed=0;
gint gran=r->gran;
char *p;
g_return_if_fail(gran>0);
/* process output fifos*/
f=r->foutputs[0];
ms_fifo_get_write_ptr(f,gran,(void**)&p);
g_return_if_fail(p!=NULL);
for (processed=0;processed<gran;){
switch(r->state){
case PLAY_RING:
err=read(r->fd,&p[processed],gran-processed);
if (err<0)
{
memset(&p[processed],0,gran-processed);
processed=gran;
g_warning("ms_ring_player_process: failed to read: %s.\n",strerror(errno));
return;
}
else if (err<gran)
{/* end of file */
r->current_pos=r->silence_bytes;
lseek(r->fd,WAVE_HEADER_OFFSET,SEEK_SET);
r->state=PLAY_SILENCE;
ms_filter_notify_event(MS_FILTER(r),MS_RING_PLAYER_END_OF_RING_EVENT,NULL);
}
if (r->need_swap) swap_buffer(&p[processed],err);
processed+=err;
break;
case PLAY_SILENCE:
err=gran-processed;
if (r->current_pos>err){
memset(&p[processed],0,err);
r->current_pos-=gran;
processed=gran;
}else{
memset(&p[processed],0,r->current_pos);
processed+=r->current_pos;
r->state=PLAY_RING;
}
break;
}
}
}
/**
* ms_ring_player_destroy:
* @obj: A valid MSRingPlayer object.
*
* Destroy a MSRingPlayer object.
*
*
*/
void ms_ring_player_destroy( MSRingPlayer *obj)
{
if (obj->fd!=0) close(obj->fd);
g_free(obj);
}
void ms_ring_player_setup(MSRingPlayer *r,MSSync *sync)
{
r->sync=sync;
r->gran=(r->rate*r->sync->interval/1000)*r->channel;
}
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