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