diff options
Diffstat (limited to 'recordmydesktop/src/capture_sound.c')
| -rw-r--r-- | recordmydesktop/src/capture_sound.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/recordmydesktop/src/capture_sound.c b/recordmydesktop/src/capture_sound.c new file mode 100644 index 0000000..5dc3839 --- /dev/null +++ b/recordmydesktop/src/capture_sound.c @@ -0,0 +1,106 @@ +/********************************************************************************* +* recordMyDesktop * +********************************************************************************** +* * +* Copyright (C) 2006 John Varouhakis * +* * +* * +* This program is free software; you can redistribute it and/or modify * +* it under the terms of the GNU General Public License as published by * +* the Free Software Foundation; either version 2 of the License, or * +* (at your option) any later version. * +* * +* This program 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 General Public License for more details. * +* * +* You should have received a copy of the GNU General Public License * +* along with this program; if not, write to the Free Software * +* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * +* * +* * +* * +* For further information contact me at biocrasher@gmail.com * +**********************************************************************************/ + + +#include <recordmydesktop.h> + +void *CaptureSound(void *pdata){ + + int frames=((ProgData *)pdata)->periodsize>>((ProgData *)pdata)->args.channels; +// fprintf(stderr,"fr %d ps %d\n",frames,((ProgData *)pdata)->periodsize);fflush(stderr); + pthread_mutex_t pmut; + pthread_mutex_init(&pmut,NULL); + ((ProgData *)pdata)->sound_buffer=NULL; + + while(((ProgData *)pdata)->running){ + int sret=0; + SndBuffer *newbuf,*tmp; + if(Paused){ + if(!((ProgData *)pdata)->hard_pause){ + snd_pcm_pause(((ProgData *)pdata)->sound_handle,1); + pthread_cond_wait(&((ProgData *)pdata)->pause_cond,&pmut); + snd_pcm_pause(((ProgData *)pdata)->sound_handle,0); + } + else{//device doesn't support pause(is this the norm?mine doesn't) + snd_pcm_close(((ProgData *)pdata)->sound_handle); + pthread_cond_wait(&((ProgData *)pdata)->pause_cond,&pmut); + + ((ProgData *)pdata)->sound_handle= + OpenDev(((ProgData *)pdata)->args.device, + ((ProgData *)pdata)->args.channels, + &((ProgData *)pdata)->args.frequency, + NULL, + NULL, + NULL//let's hope that the device capabilities didn't magically change + ); + if(((ProgData *)pdata)->sound_handle==NULL){ + fprintf(stderr,"Couldn't reopen sound device.\nThere will be no sound data from this point on.\n"); + pthread_exit(&errno); + } + } + } + + //create new buffer + newbuf=(SndBuffer *)malloc(sizeof(SndBuffer *)); + newbuf->data=(signed char *)malloc(((ProgData *)pdata)->periodsize); + newbuf->next=NULL; + + //read data into new buffer + while(sret<frames){ + int tsret=snd_pcm_readi(((ProgData *)pdata)->sound_handle, + newbuf->data+2*((ProgData *)pdata)->args.channels*sret, + frames-sret); + if(tsret==-EPIPE) + snd_pcm_prepare(((ProgData *)pdata)->sound_handle); + else if (tsret<0){ + fprintf(stderr,"An error occured while reading sound data:\n %s\n",snd_strerror(sret)); + } + else + sret+=tsret; + } + + //queue the new buffer + pthread_mutex_lock(&((ProgData *)pdata)->sound_buffer_mutex); + tmp=((ProgData *)pdata)->sound_buffer; + if(((ProgData *)pdata)->sound_buffer==NULL) + ((ProgData *)pdata)->sound_buffer=newbuf; + else{ + while(tmp->next!=NULL) + tmp=tmp->next; + tmp->next=newbuf; + } + pthread_mutex_unlock(&((ProgData *)pdata)->sound_buffer_mutex); + + + //signal that there are data to be proccessed + pthread_cond_signal(&((ProgData *)pdata)->sound_data_read); + } + snd_pcm_close(((ProgData *)pdata)->sound_handle); + pthread_exit(&errno); +} + + + |