broadcom/bcm2835/bcm2835_audio.c

217 		struct bcm2835_audio_chinfo *ch = m.u.complete.cookie;
221 		ch->callbacks++;
223 			ch->underruns++;
226 		if (ch->playback_state != PLAYBACK_IDLE) {
233 		if (ch->playback_state != PLAYBACK_IDLE) {
235 				if ((ch->available_space + count)> VCHIQ_AUDIO_BUFFER_SIZE) {
238 					    ch->available_space, count, perr);
241 					    ch->retrieved_samples, ch->submitted_samples);
243 				ch->available_space += count;
244 				ch->retrieved_samples += count;
246 			if (perr || (ch->available_space >= VCHIQ_AUDIO_PACKET_SIZE))
310 bcm2835_audio_reset_channel(struct bcm2835_audio_chinfo *ch)
313 	ch->available_space = VCHIQ_AUDIO_BUFFER_SIZE;
314 	ch->unsubmittedptr = 0;
315 	sndbuf_reset(ch->buffer);
319 bcm2835_audio_start(struct bcm2835_audio_chinfo *ch)
323 	struct bcm2835_audio_info *sc = ch->parent;
336 bcm2835_audio_stop(struct bcm2835_audio_chinfo *ch)
340 	struct bcm2835_audio_info *sc = ch->parent;
413 bcm2835_audio_buffer_should_sleep(struct bcm2835_audio_chinfo *ch)
416 	if (ch->playback_state != PLAYBACK_PLAYING)
420 	if (sndbuf_getready(ch->buffer) < VCHIQ_AUDIO_PACKET_SIZE) {
422 		ch->starved++;
427 	if (ch->available_space < VCHIQ_AUDIO_PACKET_SIZE) {
435 bcm2835_audio_write_samples(struct bcm2835_audio_chinfo *ch, void *buf, uint32_t count)
437 	struct bcm2835_audio_info *sc = ch->parent;
449 	m.u.write.cookie = ch;
474 	struct bcm2835_audio_chinfo *ch = &sc->pch;
481 	ch->playback_state = PLAYBACK_IDLE;
493 		    bcm2835_audio_buffer_should_sleep(ch)) {
504 			speed = ch->spd;
505 			format = ch->fmt;
509 			if (ch->playback_state == PLAYBACK_IDLE)
516 		    (ch->playback_state == PLAYBACK_PLAYING)) {
517 			bcm2835_audio_stop(ch);
520 			ch->playback_state = PLAYBACK_IDLE;
527 		    (ch->playback_state == PLAYBACK_IDLE)) {
529 			ch->playback_state = PLAYBACK_PLAYING;
531 			bcm2835_audio_start(ch);
534 		if (ch->playback_state == PLAYBACK_IDLE)
537 		if (sndbuf_getready(ch->buffer) == 0)
540 		count = sndbuf_getready(ch->buffer);
541 		size = sndbuf_getsize(ch->buffer);
542 		readyptr = sndbuf_getreadyptr(ch->buffer);
547 		count = min(count, ch->available_space);
554 		buf = (uint8_t*)sndbuf_getbuf(ch->buffer) + readyptr;
556 		bcm2835_audio_write_samples(ch, buf, count);
558 		ch->unsubmittedptr = (ch->unsubmittedptr + count) % sndbuf_getsize(ch->buffer);
559 		ch->available_space -= count;
560 		ch->submitted_samples += count;
561 		KASSERT(ch->available_space >= 0, ("ch->available_space == %d\n", ch->available_space));
591 	struct bcm2835_audio_chinfo *ch = &sc->pch;
597 	ch->parent = sc;
598 	ch->channel = c;
599 	ch->buffer = b;
602 	ch->spd = 44100;
603 	ch->fmt = SND_FORMAT(AFMT_S16_LE, 2, 0);
604 	ch->blksz = VCHIQ_AUDIO_PACKET_SIZE;
608 	if (sndbuf_setup(ch->buffer, buffer, sc->bufsz) != 0) {
618 	return ch;
624 	struct bcm2835_audio_chinfo *ch = data;
627 	buffer = sndbuf_getbuf(ch->buffer);
637 	struct bcm2835_audio_chinfo *ch = data;
638 	struct bcm2835_audio_info *sc = ch->parent;
641 	ch->fmt = format;
651 	struct bcm2835_audio_chinfo *ch = data;
652 	struct bcm2835_audio_info *sc = ch->parent;
655 	ch->spd = speed;
659 	return ch->spd;
665 	struct bcm2835_audio_chinfo *ch = data;
667 	return ch->blksz;
673 	struct bcm2835_audio_chinfo *ch = data;
674 	struct bcm2835_audio_info *sc = ch->parent;
683 		ch->submitted_samples = 0;
684 		ch->retrieved_samples = 0;
702 	struct bcm2835_audio_chinfo *ch = data;
703 	struct bcm2835_audio_info *sc = ch->parent;
707 	ret = ch->unsubmittedptr;