sound/isa/gus/gus_sample.c

   1 /*
   2  *  Routines for Gravis UltraSound soundcards - Sample support
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.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(struct snd_gus_card * gus, struct snd_gus_voice * v)
  32 {
  33         struct snd_seq_kinstr *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 (!strcmp(instr->ops->instr_type, SNDRV_SEQ_INSTR_ID_SIMPLE))
  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(struct snd_seq_event *ev, struct snd_gus_port *p,
  57                          struct snd_gus_voice *v)
  58 {
  59         if (v->sample_ops && v->sample_ops->sample_stop)
  60                 v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  61         v->instr.std = ev->data.sample.param.sample.std;
  62         if (v->instr.std & 0xff000000) {        /* private instrument */
  63                 v->instr.std &= 0x00ffffff;
  64                 v->instr.std |= (unsigned int)ev->source.client << 24;
  65         }
  66         v->instr.bank = ev->data.sample.param.sample.bank;
  67         v->instr.prg = ev->data.sample.param.sample.prg;
  68         select_instrument(p->gus, v);
  69 }
  70
  71 static void event_cluster(struct snd_seq_event *ev, struct snd_gus_port *p,
  72                           struct snd_gus_voice *v)
  73 {
  74         if (v->sample_ops && v->sample_ops->sample_stop)
  75                 v->sample_ops->sample_stop(p->gus, v, SAMPLE_STOP_IMMEDIATELY);
  76         v->instr.cluster = ev->data.sample.param.cluster.cluster;
  77         select_instrument(p->gus, v);
  78 }
  79
  80 static void event_start(struct snd_seq_event *ev, struct snd_gus_port *p,
  81                         struct snd_gus_voice *v)
  82 {
  83         if (v->sample_ops && v->sample_ops->sample_start)
  84                 v->sample_ops->sample_start(p->gus, v, ev->data.sample.param.position);
  85 }
  86
  87 static void event_stop(struct snd_seq_event *ev, struct snd_gus_port *p,
  88                        struct snd_gus_voice *v)
  89 {
  90         if (v->sample_ops && v->sample_ops->sample_stop)
  91                 v->sample_ops->sample_stop(p->gus, v, ev->data.sample.param.stop_mode);
  92 }
  93
  94 static void event_freq(struct snd_seq_event *ev, struct snd_gus_port *p,
  95                        struct snd_gus_voice *v)
  96 {
  97         if (v->sample_ops && v->sample_ops->sample_freq)
  98                 v->sample_ops->sample_freq(p->gus, v, ev->data.sample.param.frequency);
  99 }
 100
 101 static void event_volume(struct snd_seq_event *ev, struct snd_gus_port *p,
 102                          struct snd_gus_voice *v)
 103 {
 104         if (v->sample_ops && v->sample_ops->sample_volume)
 105                 v->sample_ops->sample_volume(p->gus, v, &ev->data.sample.param.volume);
 106 }
 107
 108 static void event_loop(struct snd_seq_event *ev, struct snd_gus_port *p,
 109                        struct snd_gus_voice *v)
 110 {
 111         if (v->sample_ops && v->sample_ops->sample_loop)
 112                 v->sample_ops->sample_loop(p->gus, v, &ev->data.sample.param.loop);
 113 }
 114
 115 static void event_position(struct snd_seq_event *ev, struct snd_gus_port *p,
 116                            struct snd_gus_voice *v)
 117 {
 118         if (v->sample_ops && v->sample_ops->sample_pos)
 119                 v->sample_ops->sample_pos(p->gus, v, ev->data.sample.param.position);
 120 }
 121
 122 static void event_private1(struct snd_seq_event *ev, struct snd_gus_port *p,
 123                            struct snd_gus_voice *v)
 124 {
 125         if (v->sample_ops && v->sample_ops->sample_private1)
 126                 v->sample_ops->sample_private1(p->gus, v, (unsigned char *)&ev->data.sample.param.raw8);
 127 }
 128
 129 typedef void (gus_sample_event_handler_t)(struct snd_seq_event *ev,
 130                                           struct snd_gus_port *p,
 131                                           struct snd_gus_voice *v);
 132 static gus_sample_event_handler_t *gus_sample_event_handlers[9] = {
 133         event_sample,
 134         event_cluster,
 135         event_start,
 136         event_stop,
 137         event_freq,
 138         event_volume,
 139         event_loop,
 140         event_position,
 141         event_private1
 142 };
 143
 144 void snd_gus_sample_event(struct snd_seq_event *ev, struct snd_gus_port *p)
 145 {
 146         int idx, voice;
 147         struct snd_gus_card *gus = p->gus;
 148         struct snd_gus_voice *v;
 149         unsigned long flags;
 150
 151         idx = ev->type - SNDRV_SEQ_EVENT_SAMPLE;
 152         if (idx < 0 || idx > 8)
 153                 return;
 154         for (voice = 0; voice < 32; voice++) {
 155                 v = &gus->gf1.voices[voice];
 156                 if (v->use && v->client == ev->source.client &&
 157                     v->port == ev->source.port &&
 158                     v->index == ev->data.sample.channel) {
 159                         spin_lock_irqsave(&gus->event_lock, flags);
 160                         gus_sample_event_handlers[idx](ev, p, v);
 161                         spin_unlock_irqrestore(&gus->event_lock, flags);
 162                         return;
 163                 }
 164         }
 165 }