[Linphone-developers] Fix for ALSA/dmix garbled output

[Lilith Verlorenes]

ok, i've tracked down the problem(s):

here's a new version of alsa_card_write in mediastreamer*/alsacard.c:

===========================
int alsa_card_write(AlsaCard *obj,char *buf,int size)
{
 int err;
 gint bsize=SND_CARD(obj)->bsize;
 g_return_val_if_fail(obj->write_handle!=NULL,-1);
 if (size!=bsize || obj->writepos!=0){
  gint canwrite;
  gint totalwrite=0;

  while(1){
   canwrite=MIN(bsize-obj->writepos,size);
   if (canwrite==0)
    break;
   memcpy(&obj->writebuf[obj->writepos],buf,canwrite);
   obj->writepos+=canwrite;
   if (obj->writepos>=bsize){
    err=__alsa_card_write(obj,obj->writebuf,bsize);
    obj->writepos=0;
   }
   size-=canwrite;
   buf+=canwrite;
   totalwrite+=canwrite;
         }
  return totalwrite;
 }else{
  return __alsa_card_write(obj,buf,bsize);
 }
}
===========================

changes: 

1) tighter checks on when it is possible to pass a complete buffer through 
without using obj->writebuf

2) call  __alsa_card_write as many times as needed rather than only once.

linphone now works very well on my system, thank you!

lilith