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Rev 527 Rev 530
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	snd_pcm_channel_area_t *areas = data->areas;*/
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	snd_pcm_channel_area_t *areas = data->areas;*/
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	snd_pcm_sframes_t avail;
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	snd_pcm_sframes_t avail;
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	int err;
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	int err;
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	avail = snd_pcm_avail_update(handle);
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	avail = snd_pcm_avail_update(handle);
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	while ((avail >= period_size) /*&& ((period*period_size) < (CHIRP_SIZE-100))*/ ) {
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	while ((avail >= period_size) && ((period*period_size) < (CHIRP_SIZE-100)) ) {
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		err = snd_pcm_writei(handle, (chirp+period*period_size), period_size);
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		err = snd_pcm_writei(handle, (chirp+period*period_size), period_size);
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		if (err < 0) {
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		if (err < 0) {
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			printf("Write error: %s\n", snd_strerror(err));
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			printf("Write error: %s\n", snd_strerror(err));
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			exit(EXIT_FAILURE);
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			exit(EXIT_FAILURE);
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	if ((err = set_hwparams(capture_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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	if ((err = set_hwparams(capture_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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		printf("Setting of hwparams failed: %s\n", snd_strerror(err));
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		printf("Setting of hwparams failed: %s\n", snd_strerror(err));
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		exit(EXIT_FAILURE);
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		exit(EXIT_FAILURE);
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	}
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	}
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/*	if ((err = set_swparams(capture_handle, swparams)) < 0) {
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	if ((err = set_swparams(capture_handle, swparams)) < 0) {
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		printf("Setting of swparams failed: %s\n", snd_strerror(err));
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		printf("Setting of swparams failed: %s\n", snd_strerror(err));
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		exit(EXIT_FAILURE);
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		exit(EXIT_FAILURE);
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	}*/
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	}
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// allocate memory for frame (package of samples)
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// allocate memory for frame (package of samples)
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	frame = malloc((period_size * channels * snd_pcm_format_physical_width(format)) / 8);
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	frame = malloc((period_size * channels * snd_pcm_format_physical_width(format)) / 8);
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	if (frame == NULL) {
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	if (frame == NULL) {
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		printf("No enough memory\n");
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		printf("No enough memory\n");
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	/* because all other work is done in the signal handler,
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	/* because all other work is done in the signal handler,
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	   suspend the process */
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	   suspend the process */
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	while(cperiod<10) {
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	while(cperiod<3) {
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		sleep(1);
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		sleep(1);
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	}
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	}
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	out=fopen("./output.txt","w");
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	out=fopen("./output.txt","w");
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	for(i=0;i<=100000;i++) fprintf(out,"%d ",signal[i]);
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	for(i=0;i<=100000;i++) fprintf(out,"%d ",signal[i]);