15 #include "dsp.h"
367  * pattern - the type of the pattern
368  * count - the sample from the beginning of the pattern (phase)
369  * len - the number of bytes
371  * return - the sk_buff with the sample
373  * if tones has finished (e.g. knocking tone), dsp->tones is turned off
375 void dsp_tone_copy(struct dsp *dsp, u8 *data, int len)  in dsp_tone_copy()  argument
379 	struct dsp_tone *tone = &dsp->tone;  in dsp_tone_copy()
382 	if (!tone->tone) {  in dsp_tone_copy()
388 	pat = (struct pattern *)tone->pattern;  in dsp_tone_copy()
390 	index = tone->index; /* gives current sequence index */  in dsp_tone_copy()
391 	count = tone->count; /* gives current sample */  in dsp_tone_copy()
398 			if (!pat->seq[index]) {  in dsp_tone_copy()
403 			if (count < pat->seq[index])  in dsp_tone_copy()
408 			count -= pat->seq[index];  in dsp_tone_copy()
412 		start = count % (*(pat->siz[index]));  in dsp_tone_copy()
414 		if (num + count > pat->seq[index])  in dsp_tone_copy()
415 			num = pat->seq[index] - count;  in dsp_tone_copy()
416 		if (num + start > (*(pat->siz[index])))  in dsp_tone_copy()
417 			num = (*(pat->siz[index])) - start;  in dsp_tone_copy()
419 		memcpy(data, pat->data[index] + start, num);  in dsp_tone_copy()
423 		len -= num;  in dsp_tone_copy()
425 	tone->index = index;  in dsp_tone_copy()
426 	tone->count = count;  in dsp_tone_copy()
438 dsp_tone_hw_message(struct dsp *dsp, u8 *sample, int len)  in dsp_tone_hw_message()  argument
447 		if (dsp->ch.peer) {  in dsp_tone_hw_message()
448 			if (dsp->ch.recv(dsp->ch.peer, nskb))  in dsp_tone_hw_message()
457  * timer expires *
462 	struct dsp *dsp = from_timer(dsp, t, tone.tl);  in dsp_tone_timeout()  local
463 	struct dsp_tone *tone = &dsp->tone;  in dsp_tone_timeout()
464 	struct pattern *pat = (struct pattern *)tone->pattern;  in dsp_tone_timeout()
465 	int index = tone->index;  in dsp_tone_timeout()
467 	if (!tone->tone)  in dsp_tone_timeout()
471 	if (!pat->seq[index])  in dsp_tone_timeout()
473 	tone->index = index;  in dsp_tone_timeout()
476 	if (pat->data[index] == DATA_S)  in dsp_tone_timeout()
477 		dsp_tone_hw_message(dsp, NULL, 0);  in dsp_tone_timeout()
479 		dsp_tone_hw_message(dsp, pat->data[index], *(pat->siz[index]));  in dsp_tone_timeout()
480 	/* set timer */  in dsp_tone_timeout()
481 	tone->tl.expires = jiffies + (pat->seq[index] * HZ) / 8000;  in dsp_tone_timeout()
482 	add_timer(&tone->tl);  in dsp_tone_timeout()
496 dsp_tone(struct dsp *dsp, int tone)  in dsp_tone()  argument
500 	struct dsp_tone *tonet = &dsp->tone;  in dsp_tone()
502 	tonet->software = 0;  in dsp_tone()
503 	tonet->hardware = 0;  in dsp_tone()
507 		if (dsp->features.hfc_loops && timer_pending(&tonet->tl))  in dsp_tone()
508 			del_timer(&tonet->tl);  in dsp_tone()
509 		if (dsp->features.hfc_loops)  in dsp_tone()
510 			dsp_tone_hw_message(dsp, NULL, 0);  in dsp_tone()
511 		tonet->tone = 0;  in dsp_tone()
525 		printk(KERN_WARNING "dsp: given tone 0x%x is invalid\n", tone);  in dsp_tone()
526 		return -EINVAL;  in dsp_tone()
531 	tonet->tone = tone;  in dsp_tone()
532 	tonet->pattern = pat;  in dsp_tone()
533 	tonet->index = 0;  in dsp_tone()
534 	tonet->count = 0;  in dsp_tone()
536 	if (dsp->features.hfc_loops) {  in dsp_tone()
537 		tonet->hardware = 1;  in dsp_tone()
539 		dsp_tone_hw_message(dsp, pat->data[0], *(pat->siz[0]));  in dsp_tone()
540 		/* set timer */  in dsp_tone()
541 		if (timer_pending(&tonet->tl))  in dsp_tone()
542 			del_timer(&tonet->tl);  in dsp_tone()
543 		tonet->tl.expires = jiffies + (pat->seq[0] * HZ) / 8000;  in dsp_tone()
544 		add_timer(&tonet->tl);  in dsp_tone()
546 		tonet->software = 1;  in dsp_tone()