sound/isa/gus/gus_sample.c

   1 /*
   2  *  Routines for Gravis UltraSound soundcards - Sample support
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/driver.h>
  23 #include <linux/time.h>
  24 #include <sound/core.h>
  25 #include <sound/gus.h>
  26
  27 /*
  28  *
  29  */
  30
  31 static void select_instrument(snd_gus_card_t * gus, snd_gus_voice_t * v)
  32 {
  33         snd_seq_kinstr_t *instr;
  34
  35 #if 0
  36         printk("select instrument: cluster = %li, std = 0x%x, bank = %i, prg = %i\n",
  37                                         v->instr.cluster,
  38                                         v->instr.std,
  39                                         v->instr.bank,
  40                                         v->instr.prg);
  41 #endif
  42         instr = snd_seq_instr_find(gus->gf1.ilist, &v->instr, 0, 1);
  43         if (instr != NULL) {
  44                 if (instr->ops) {
  45                         if (instr->ops->instr_type == snd_seq_simple_id)
  46                                 snd_gf1_simple_init(v);
  47                 }
  48                 snd_seq_instr_free_use(gus->gf1.ilist, instr);
  49         }
  50 }
  51
  52 /*
  53  *
  54  */
  55
  56 static void event_sample(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  57 {
  58         if (v->sample_ops && v->sample_ops->sample_stop)
  59                 v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  60         v->instr.std = ev->data.sample.param.sample.std;
  61         if (v->instr.std & 0xff000000) {        /* private instrument */
  62                 v->instr.std &= 0x00ffffff;
  63                 v->instr.std |= (unsigned int)ev->source.client << 24;
  64         }
  65         v->instr.bank = ev->data.sample.param.sample.bank;
  66         v->instr.prg = ev->data.sample.param.sample.prg;
  67         select_instrument(p->gus, v);
  68 }
  69
  70 static void event_cluster(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  71 {
  72         if (v->sample_ops && v->sample_ops->sample_stop)
  73                 v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  74         v->instr.cluster = ev->data.sample.param.cluster.cluster;
  75         select_instrument(p->gus, v);
  76 }
  77
  78 static void event_start(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  79 {
  80         if (v->sample_ops && v->sample_ops->sample_start)
  81                 v->sample_ops->sample_start(p->gus, v, ev->data.sample.param.position);
  82 }
  83
  84 static void event_stop(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  85 {
  86         if (v->sample_ops && v->sample_ops->sample_stop)
  87                 v->sample_ops->sample_stop(p->gus, v, ev->data.sample.param.stop_mode);
  88 }
  89
  90 static void event_freq(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  91 {
  92         if (v->sample_ops && v->sample_ops->sample_freq)
  93                 v->sample_ops->sample_freq(p->gus, v, ev->data.sample.param.frequency);
  94 }
  95
  96 static void event_volume(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
  97 {
  98         if (v->sample_ops && v->sample_ops->sample_volume)
  99                 v->sample_ops->sample_volume(p->gus, v, &ev->data.sample.param.volume);
 100 }
 101
 102 static void event_loop(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
 103 {
 104         if (v->sample_ops && v->sample_ops->sample_loop)
 105                 v->sample_ops->sample_loop(p->gus, v, &ev->data.sample.param.loop);
 106 }
 107
 108 static void event_position(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
 109 {
 110         if (v->sample_ops && v->sample_ops->sample_pos)
 111                 v->sample_ops->sample_pos(p->gus, v, ev->data.sample.param.position);
 112 }
 113
 114 static void event_private1(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v)
 115 {
 116         if (v->sample_ops && v->sample_ops->sample_private1)
 117                 v->sample_ops->sample_private1(p->gus, v, (unsigned char *)&ev->data.sample.param.raw8);
 118 }
 119
 120 typedef void (gus_sample_event_handler_t)(snd_seq_event_t *ev, snd_gus_port_t *p, snd_gus_voice_t *v);
 121
 122 static gus_sample_event_handler_t *gus_sample_event_handlers[9] = {
 123         event_sample,
 124         event_cluster,
 125         event_start,
 126         event_stop,
 127         event_freq,
 128         event_volume,
 129         event_loop,
 130         event_position,
 131         event_private1
 132 };
 133
 134 void snd_gus_sample_event(snd_seq_event_t *ev, snd_gus_port_t *p)
 135 {
 136         int idx, voice;
 137         snd_gus_card_t *gus = p->gus;
 138         snd_gus_voice_t *v;
 139         unsigned long flags;
 140
 141         idx = ev->type - SNDRV_SEQ_EVENT_SAMPLE;
 142         if (idx < 0 || idx > 8)
 143                 return;
 144         for (voice = 0; voice < 32; voice++) {
 145                 v = &gus->gf1.voices[voice];
 146                 if (v->use && v->client == ev->source.client &&
 147                     v->port == ev->source.port &&
 148                     v->index == ev->data.sample.channel) {
 149                         spin_lock_irqsave(&gus->event_lock, flags);
 150                         gus_sample_event_handlers[idx](ev, p, v);
 151                         spin_unlock_irqrestore(&gus->event_lock, flags);
 152                         return;
 153                 }
 154         }
 155 }