| /* |
| 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 "msosswrite.h" |
| #include "mssync.h" |
| #include <unistd.h> |
| #include <math.h> |
| |
| MSFilterInfo oss_write_info={ |
| "OSS write", |
| 0, |
| MS_FILTER_OTHER, |
| ms_oss_write_new, |
| NULL |
| }; |
| |
| |
| static MSOssWriteClass *msosswriteclass=NULL; |
| |
| MSFilter * ms_oss_write_new() |
| { |
| MSOssWrite *w; |
| |
| if (msosswriteclass==NULL) |
| { |
| msosswriteclass=g_new(MSOssWriteClass,1); |
| ms_oss_write_class_init( msosswriteclass ); |
| } |
| w=g_new(MSOssWrite,1); |
| MS_FILTER(w)->klass=MS_FILTER_CLASS(msosswriteclass); |
| ms_oss_write_init(w); |
| return(MS_FILTER(w)); |
| } |
| |
| /* FOR INTERNAL USE*/ |
| void ms_oss_write_init(MSOssWrite *w) |
| { |
| ms_sound_write_init(MS_SOUND_WRITE(w)); |
| MS_FILTER(w)->infifos=w->f_inputs; |
| MS_FILTER(w)->infifos[0]=NULL; |
| MS_FILTER(w)->r_mingran=512; /* very few cards can do that...*/ |
| w->devid=0; |
| w->sndcard=NULL; |
| w->freq=8000; |
| w->channels=1; |
| w->dtmf_time=-1; |
| } |
| |
| gint ms_oss_write_set_property(MSOssWrite *f,MSFilterProperty prop, void *value) |
| { |
| switch(prop){ |
| case MS_FILTER_PROPERTY_FREQ: |
| f->freq=((gint*)value)[0]; |
| break; |
| case MS_FILTER_PROPERTY_CHANNELS: |
| f->channels=((gint*)value)[0]; |
| break; |
| } |
| return 0; |
| } |
| |
| void ms_oss_write_class_init(MSOssWriteClass *klass) |
| { |
| ms_sound_write_class_init(MS_SOUND_WRITE_CLASS(klass)); |
| MS_FILTER_CLASS(klass)->max_finputs=1; /* one fifo input only */ |
| MS_FILTER_CLASS(klass)->r_maxgran=MS_OSS_WRITE_DEF_GRAN; |
| MS_FILTER_CLASS(klass)->process= (MSFilterProcessFunc)ms_oss_write_process; |
| MS_FILTER_CLASS(klass)->destroy= (MSFilterDestroyFunc)ms_oss_write_destroy; |
| MS_FILTER_CLASS(klass)->setup= (MSFilterSetupFunc)ms_oss_write_setup; |
| MS_FILTER_CLASS(klass)->unsetup= (MSFilterSetupFunc)ms_oss_write_stop; |
| MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_oss_write_set_property; |
| MS_FILTER_CLASS(klass)->info=&oss_write_info; |
| MS_SOUND_WRITE_CLASS(klass)->set_device=(gint (*)(MSSoundWrite*,gint))ms_oss_write_set_device; |
| MS_SOUND_WRITE_CLASS(klass)->start=(void (*)(MSSoundWrite*))ms_oss_write_start; |
| MS_SOUND_WRITE_CLASS(klass)->stop=(void (*)(MSSoundWrite*))ms_oss_write_stop; |
| MS_SOUND_WRITE_CLASS(klass)->set_level=(void (*)(MSSoundWrite*, gint))ms_oss_write_set_level; |
| ms_filter_class_set_name(MS_FILTER_CLASS(klass),"OssWrite"); |
| } |
| |
| void ms_oss_write_destroy( MSOssWrite *obj) |
| { |
| |
| g_free(obj); |
| } |
| |
| void ms_oss_write_process(MSOssWrite *f) |
| { |
| MSFifo *fifo; |
| void *p; |
| int i; |
| gint gran=ms_filter_get_mingran(MS_FILTER(f)); |
| |
| /* always consume something */ |
| fifo=f->f_inputs[0]; |
| ms_fifo_get_read_ptr(fifo,gran,&p); |
| if (p==NULL) { |
| g_warning("Not enough data: gran=%i.",gran); |
| return; |
| } |
| g_return_if_fail(f->sndcard!=NULL); |
| if (f->dtmf_time!=-1){ |
| gint16 *buf=(gint16*)p; |
| /* generate a DTMF*/ |
| for(i=0;i<gran/2;i++){ |
| buf[i]=(gint16)(10000.0*sin(2*M_PI*(double)f->dtmf_time*f->lowfreq)); |
| buf[i]+=(gint16)(10000.0*sin(2*M_PI*(double)f->dtmf_time*f->highfreq)); |
| f->dtmf_time++; |
| //printf("buf[%i]=%i\n",i,buf[i]); |
| } |
| if (f->dtmf_time>f->dtmf_duration) f->dtmf_time=-1; /*finished*/ |
| } |
| snd_card_write(f->sndcard,p,gran); |
| } |
| |
| void ms_oss_write_start(MSOssWrite *w) |
| { |
| gint bsize; |
| g_return_if_fail(w->devid!=-1); |
| w->sndcard=snd_card_manager_get_card(snd_card_manager,w->devid); |
| g_return_if_fail(w->sndcard!=NULL); |
| /* open the device for an audio telephony signal with minimum latency */ |
| snd_card_open_w(w->sndcard,16,w->channels==2,w->freq); |
| w->bsize=snd_card_get_bsize(w->sndcard); |
| //MS_FILTER(w)->r_mingran=w->bsize; |
| //ms_sync_set_samples_per_tick(MS_FILTER(w)->sync,bsize); |
| } |
| |
| void ms_oss_write_stop(MSOssWrite *w) |
| { |
| g_return_if_fail(w->devid!=-1); |
| g_return_if_fail(w->sndcard!=NULL); |
| snd_card_close_w(w->sndcard); |
| w->sndcard=NULL; |
| } |
| |
| void ms_oss_write_set_level(MSOssWrite *w,gint a) |
| { |
| |
| } |
| |
| gint ms_oss_write_set_device(MSOssWrite *w, gint devid) |
| { |
| w->devid=devid; |
| return 0; |
| } |
| |
| void ms_oss_write_setup(MSOssWrite *r) |
| { |
| //g_message("starting MSOssWrite.."); |
| ms_oss_write_start(r); |
| } |
| |
| |
| |
| void ms_oss_write_play_dtmf(MSOssWrite *w, char dtmf){ |
| |
| w->dtmf_duration=0.1*w->freq; |
| switch(dtmf){ |
| case '0': |
| w->lowfreq=941; |
| w->highfreq=1336; |
| break; |
| case '1': |
| w->lowfreq=697; |
| w->highfreq=1209; |
| break; |
| case '2': |
| w->lowfreq=697; |
| w->highfreq=1336; |
| break; |
| case '3': |
| w->lowfreq=697; |
| w->highfreq=1477; |
| break; |
| case '4': |
| w->lowfreq=770; |
| w->highfreq=1209; |
| break; |
| case '5': |
| w->lowfreq=770; |
| w->highfreq=1336; |
| break; |
| case '6': |
| w->lowfreq=770; |
| w->highfreq=1477; |
| break; |
| case '7': |
| w->lowfreq=852; |
| w->highfreq=1209; |
| break; |
| case '8': |
| w->lowfreq=852; |
| w->highfreq=1336; |
| break; |
| case '9': |
| w->lowfreq=852; |
| w->highfreq=1477; |
| break; |
| case '*': |
| w->lowfreq=941; |
| w->highfreq=1209; |
| break; |
| case '#': |
| w->lowfreq=941; |
| w->highfreq=1477; |
| break; |
| case 'A': |
| w->lowfreq=697; |
| w->highfreq=1633; |
| break; |
| case 'B': |
| w->lowfreq=770; |
| w->highfreq=1633; |
| break; |
| case 'C': |
| w->lowfreq=852; |
| w->highfreq=1633; |
| break; |
| case 'D': |
| w->lowfreq=941; |
| w->highfreq=1633; |
| break; |
| default: |
| g_warning("Not a dtmf key."); |
| return; |
| } |
| w->lowfreq=w->lowfreq/w->freq; |
| w->highfreq=w->highfreq/w->freq; |
| w->dtmf_time=0; |
| } |