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/*********************************************************************************
* 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);
}
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