text: /*
   *  Routines for Gravis UltraSound soundcards - Sample support
   *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   *
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   *
   */
  
  #include <sound/driver.h>
  #include <linux/time.h>
  #include <sound/core.h>
  #include <sound/gus.h>
  
  /*
   *
   */
  
  static void select_instrument(snd_gus_card_t * gus, snd_gus_voice_t * v)
  {
  	snd_seq_kinstr_t *instr;
  
  #if 0
  	printk("select instrument: cluster = %li, std = 0x%x, bank = %i, prg = %i\n",
  					v->instr.cluster,
  					v->instr.std,
  					v->instr.bank,
  					v->instr.prg);
  #endif
  	instr = snd_seq_instr_find(gus->gf1.ilist, &v->instr, 0, 1);
  	if (instr != NULL) {
  		if (instr->ops) {
  			if (instr->ops->instr_type == snd_seq_simple_id)
  				snd_gf1_simple_init(v);
  		}
  		snd_seq_instr_free_use(gus->gf1.ilist, instr);
  	}
  }
  
  /*
   *
   */
  
  static void event_sample(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_stop)
  		v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  	v->instr.std = ev->data.sample.param.sample.std;
  	if (v->instr.std & 0xff000000) {        /* private instrument */
  		v->instr.std &= 0x00ffffff;
  		v->instr.std |= (unsigned int)ev->source.client << 24;
  	}                                                
  	v->instr.bank = ev->data.sample.param.sample.bank;
  	v->instr.prg = ev->data.sample.param.sample.prg;
  	select_instrument(p->gus, v);
  }
  
  static void event_cluster(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_stop)
  		v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  	v->instr.cluster = ev->data.sample.param.cluster.cluster;
  	select_instrument(p->gus, v);
  }
  
  static void event_start(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_start)
  		v->sample_ops->sample_start(p->gus, v, ev->data.sample.param.position);
  }
  
  static void event_stop(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_stop)
  		v->sample_ops->sample_stop(p->gus, v, ev->data.sample.param.stop_mode);
  }
  
  static void event_freq(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_freq)
  		v->sample_ops->sample_freq(p->gus, v, ev->data.sample.param.frequency);
  }
  
  static void event_volume(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_volume)
  		v->sample_ops->sample_volume(p->gus, v, &ev->data.sample.param.volume);
  }
  
  static void event_loop(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_loop)
  		v->sample_ops->sample_loop(p->gus, v, &ev->data.sample.param.loop);
  }
  
  static void event_position(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_pos)
  		v->sample_ops->sample_pos(p->gus, v, ev->data.sample.param.position);
  }
  
  static void event_private1(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  {
  	if (v->sample_ops && v->sample_ops->sample_private1)
  		v->sample_ops->sample_private1(p->gus, v, (unsigned char *)&ev->data.sample.param.raw8);
  }
  
  typedef void (gus_sample_event_handler_t)(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v);
  
  static gus_sample_event_handler_t *gus_sample_event_handlers[9] = {
  	event_sample,
  	event_cluster,
  	event_start,
  	event_stop,
  	event_freq,
  	event_volume,
  	event_loop,
  	event_position,
  	event_private1
  };
  
  void snd_gus_sample_event(snd_seq_event_t *ev, snd_gus_port_t *p)
  {
  	int idx, voice;
  	snd_gus_card_t *gus = p->gus;
  	snd_gus_voice_t *v;
  	unsigned long flags;
  	
  	idx = ev->type - SNDRV_SEQ_EVENT_SAMPLE;
  	if (idx < 0 || idx > 8)
  		return;
  	for (voice = 0; voice < 32; voice++) {
  		v = &gus->gf1.voices[voice];
  		if (v->use && v->client == ev->source.client &&
  		    v->port == ev->source.port &&
  		    v->index == ev->data.sample.channel) {
  		    	spin_lock_irqsave(&gus->event_lock, flags);
  			gus_sample_event_handlers[idx](ev, p, v);
  			spin_unlock_irqrestore(&gus->event_lock, flags);
  			return;
  		}
  	}
  }
  