示例#1
0
void generate_tone()
{
	int nsamples;
	GR_EVENT event;
	int freq = 0;
//	struct audio_buf_info info;
//	char buf[20];

	while(!generator_paused) {
		if(generator_freq != freq) {
			freq = generator_freq;
			nsamples = make_wave_buffer(generator_freq); 
//add wave types here - tbd
		}
// we need to use ioctl to get available space and ensure we dont write too much to improve response
// times while changing freq/notes. to be done
//        	ioctl(dspz.dsp, SNDCTL_DSP_GETOSPACE, &info);
//		sprintf(buf, "f:%d, s/f: %d", info.fragstotal, info.fragsize);
//		sprintf(buf, "afs: %d, ab: %d", info.fragments, info.bytes);
//		generator_draw_text(buf);
		
		dsp_write( &dspz, wave_buffer, sizeof(short)*nsamples);	// dont write block
		if(GrPeekEvent(&event)) {
repeat:
			GrGetNextEventTimeout(&event, 1000);
			if (event.type != GR_EVENT_TYPE_TIMEOUT) {
				pz_event_handler(&event);
				if (GrPeekEvent(&event)) 
					goto repeat;
			}
		}
	}
	if (generator_quit_app)	// menu button in the middle of a play
		generator_button_menu();//get out of the app
		// better way to get out of the event handler - tbd
}
示例#2
0
文件: play.c 项目: AmesianX/baresip
int winwave_play_alloc(struct auplay_st **stp, const struct auplay *ap,
		       struct auplay_prm *prm, const char *device,
		       auplay_write_h *wh, void *arg)
{
	struct auplay_st *st;
	int i, err;

	if (!stp || !ap || !prm)
		return EINVAL;

	st = mem_zalloc(sizeof(*st), auplay_destructor);
	if (!st)
		return ENOMEM;

	st->ap  = ap;
	st->wh  = wh;
	st->arg = arg;

	err = write_stream_open(st, prm, find_dev(device));
	if (err)
		goto out;

	/* The write runs at 100ms intervals
	 * prepare enough buffers to suite its needs
	 */
	for (i = 0; i < 5; i++)
		dsp_write(st);

 out:
	if (err)
		mem_deref(st);
	else
		*stp = st;

	return err;
}
示例#3
0
void dtmf_play( dsp_st *dspz, char key )
{
    int bp;
    int f1p = 0;
    int f2p = 0;
    int freq1 = F_0;
    int freq2 = F_0;
    int ontime = 66;
    int nsamps = 44100;
    int ntimes = 1;
    int c;
    short * buf;

    switch( key ) {
    case( 'c' ):
    case( 'r' ):
    case( 'b' ):
        dtmf_play( dspz, 'S' );	/* trigger 2600hz wink */
        break;
    }


    /* freq 1 */
    switch( key ) {
    case( '1' ):
    case( '2' ):
    case( '3' ):
    case( 'A' ):
        freq1 = F_697;
        break;
    case( '4' ):
    case( '5' ):
    case( '6' ):
    case( 'B' ):
        freq1 = F_770;
        break;
    case( '7' ):
    case( '8' ):
    case( '9' ):
    case( 'C' ):
        freq1 = F_852;
        break;
    case( '*' ):
    case( '0' ):
    case( '#' ):
    case( 'D' ):
        freq1 = F_941;
        break;
    case( 's' ):
    case( 'S' ):
        freq1 = F_2600;
        break;
    case( 't' ):
        freq1 = F_1850;
        break;
    case( 'n' ):
    case( 'd' ):
    case( 'q' ):
        freq1 = F_700;
        break;
    case( 'c' ):
    case( 'b' ):
        freq1 = F_700;
        break;
    case( 'r' ):
        freq1 = F_1100;
        break;
    }

    /* freq 2 */
    switch( key ) {
    case( '1' ):
    case( '4' ):
    case( '7' ):
    case( '*' ):
        freq2 = F_1209;
        break;
    case( '2' ):
    case( '5' ):
    case( '8' ):
    case( '0' ):
        freq2 = F_1336;
        break;
    case( '3' ):
    case( '6' ):
    case( '9' ):
    case( '#' ):
        freq2 = F_1477;
        break;
    case( 'A' ):
    case( 'B' ):
    case( 'C' ):
    case( 'D' ):
        freq2 = F_1633;
        break;
    case( 's' ):
    case( 'S' ):
        freq2 = F_0;
        break;
    case( 't' ):
        freq2 = F_0;
        break;
    case( 'n' ):
    case( 'd' ):
    case( 'q' ):
        freq2 = F_0;
        break;
    case( 'c' ):
        freq2 = F_1100;
        break;
    case( 'r' ):
    case( 'b' ):
        freq2 = F_1700;
        break;
    }

    /* adjust timings */
    if( key == 'q' ) ontime = 33;
    if( key == ',' ) ontime = 250;	/* pause */
    if( key == 'A' || key == 'B' || key == 'C' || key == 'D' ) ontime = 500;
    if( key == 's' || key == 't' ) ontime = 500;
    if( key == 'S' ) ontime = 90;
    if( key == 'c' || key == 'r' || key == 'b' ) ontime = 1000;

    /* adjust repeats */
    if( key == 'q' ) ntimes = 5;
    if( key == 'd' ) ntimes = 2;

    nsamps = ontime * 44100 / 1000;
    buf = (short *)malloc( sizeof( short ) * nsamps );

    for( c=0 ; c<ntimes ; c++ )
    {
        // play the two tones
        for( bp = 0 ; bp < nsamps ; bp++ )
        {
            /* copy over and add the two waveforms */
            buf[bp] = (waveforms[freq1].samples[f1p++])
                      + (waveforms[freq2].samples[f2p++]);
            buf[bp] = buf[bp] << 6;

            /* adjust sample pointers */
            if( f1p >= waveforms[freq1].nsamples )  f1p = 0;
            if( f2p >= waveforms[freq2].nsamples )  f2p = 0;
        }
#ifdef __linux__
        dsp_write( dspz, buf, nsamps*sizeof(short));
#endif

        /* zero it out */
        for( bp=0 ; bp < nsamps ; bp++ )  buf[bp] = 0;

        if( key == 'S' ) {
            nsamps = nsamps * 2 / 3; /* 60ms instead of 90 */
        }

#ifdef __linux__
        dsp_write( dspz, buf, nsamps*sizeof(short));
#endif
    }

    free( buf );
}