Ejemplos de alsa_open_r en C++ (Cpp)

Ejemplo n.º 1

void alsa_read_process(MSFilter *obj){
	AlsaReadData *ad=(AlsaReadData*)obj->data;
#ifdef AMD_HACK
	int samples=(160*ad->rate)/8000;
#else
	int samples=(128*ad->rate)/8000;
#endif
	int err;
	mblk_t *om=NULL;
	if (ad->handle==NULL && ad->pcmdev!=NULL){
		ad->handle=alsa_open_r(ad->pcmdev,16,ad->nchannels==2,ad->rate);
	}
	if (ad->handle==NULL) return;
	while (alsa_can_read(ad->handle,samples)){
		int size=samples*2;
		om=allocb(size,0);
		if ((err=alsa_read(ad->handle,om->b_wptr,samples))<=0) {
			ms_warning("Fail to read samples");
			freemsg(om);
			return;
		}
		size=err*2;
		om->b_wptr+=size;
		/*ms_message("alsa_read_process: Outputing %i bytes",size);*/
		ms_queue_put(obj->outputs[0],om);
#ifdef AMD_HACK
		break;
#endif
	}
}

Ejemplo n.º 2

Archivo: alsa.c Proyecto: TheBaobabTeam/linphone-android

void alsa_read_process(MSFilter *obj){
	AlsaReadData *ad=(AlsaReadData*)obj->data;
	int samples=(128*ad->rate)/8000;
	int err;
	mblk_t *om=NULL;
	if (ad->handle==NULL && ad->pcmdev!=NULL && !ad->read_started){
		ad->read_started=TRUE;
		ad->handle=alsa_open_r(ad->pcmdev,16,ad->nchannels==2,ad->rate);
		if (ad->handle){
			ad->read_samples=0;
			ms_ticker_set_time_func(obj->ticker,(uint64_t (*)(void*))ms_ticker_synchronizer_get_corrected_time, ad->ticker_synchronizer);
		}
	}
	if (ad->handle==NULL) return;
	while (alsa_can_read(ad->handle)>=samples){

		int size=samples*2*ad->nchannels;
		om=allocb(size,0);
		if ((err=alsa_read(ad->handle,om->b_wptr,samples))<=0) {
			ms_warning("Fail to read samples");
			freemsg(om);
			return;
		}
		ad->read_samples+=err;
		size=err*2*ad->nchannels;
		om->b_wptr+=size;
		compute_timespec(ad);

		/*ms_message("alsa_read_process: Outputing %i bytes",size);*/
		ms_queue_put(obj->outputs[0],om);
	}
}

Ejemplo n.º 3

static void * alsa_write_thread(void *p){
	AlsaReadData *ad=(AlsaReadData*)p;
	int samples=(160*ad->rate)/8000;
	int err;
	int count=0;
	mblk_t *om=NULL;
	struct timeval timeout;
	if (ad->handle==NULL && ad->pcmdev!=NULL){
		ad->handle=alsa_open_r(ad->pcmdev,16,ad->nchannels==2,ad->rate);
	}
	if (ad->handle==NULL) return NULL;

	while (ad->read_started)
	  {
	    count = alsa_can_read(ad->handle,samples);
	    if (count==24)
	      { /* keep this value for this driver */ }
	    else if (count<=0)
	      {
		count = samples;
	      }
	    else if (count>0)
	      {
		//ms_warning("%i count", count);
		//count = samples;
	      }

	    int size=count*2;
	    om=allocb(size,0);

	    if ((err=alsa_read(ad->handle,om->b_wptr,count))<=0)
	      {
		ms_warning("nothing to read");
		//ms_warning("Fail to read samples %i", count);
		continue;
	      }
	    //ms_warning(" read %i", err);
	    
	    size=err*2;
	    om->b_wptr+=size;

	    ms_mutex_lock(&ad->mutex);
	    ms_bufferizer_put(ad->bufferizer,om);
	    ms_mutex_unlock(&ad->mutex);

	    if (count==24)
	      {
		timeout.tv_sec = 0;
		timeout.tv_usec = 2000;
		select(0, 0, NULL, NULL, &timeout );
	      }
	    else
	      {
		/* select will be less active than locking on "read" */
		timeout.tv_sec = 0;
		timeout.tv_usec = 5000;
		select(0, 0, NULL, NULL, &timeout );
	      }
	  }

	if (ad->handle!=NULL) snd_pcm_close(ad->handle);
	ad->handle=NULL;
	return NULL;
}