[ALSA] emux - Avoid cast of function pointers
[linux-2.6.git] / sound / synth / emux / emux.c
1 /*
2  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
3  *
4  *  Routines for control of EMU WaveTable chip
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 #include <sound/driver.h>
22 #include <linux/wait.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25 #include <linux/string.h>
26 #include <sound/core.h>
27 #include <sound/emux_synth.h>
28 #include <linux/init.h>
29 #include "emux_voice.h"
30
31 MODULE_AUTHOR("Takashi Iwai");
32 MODULE_DESCRIPTION("Routines for control of EMU WaveTable chip");
33 MODULE_LICENSE("GPL");
34
35 /*
36  * create a new hardware dependent device for Emu8000/Emu10k1
37  */
38 int snd_emux_new(snd_emux_t **remu)
39 {
40         snd_emux_t *emu;
41
42         *remu = NULL;
43         emu = kzalloc(sizeof(*emu), GFP_KERNEL);
44         if (emu == NULL)
45                 return -ENOMEM;
46
47         spin_lock_init(&emu->voice_lock);
48         init_MUTEX(&emu->register_mutex);
49
50         emu->client = -1;
51 #ifdef CONFIG_SND_SEQUENCER_OSS
52         emu->oss_synth = NULL;
53 #endif
54         emu->max_voices = 0;
55         emu->use_time = 0;
56
57         init_timer(&emu->tlist);
58         emu->tlist.function = snd_emux_timer_callback;
59         emu->tlist.data = (unsigned long)emu;
60         emu->timer_active = 0;
61
62         *remu = emu;
63         return 0;
64 }
65
66
67 /*
68  */
69 static int sf_sample_new(void *private_data, snd_sf_sample_t *sp,
70                          snd_util_memhdr_t *hdr,
71                          const void __user *buf, long count)
72 {
73         snd_emux_t *emu = private_data;
74         return emu->ops.sample_new(emu, sp, hdr, buf, count);
75         
76 }
77
78 static int sf_sample_free(void *private_data, snd_sf_sample_t *sp,
79                           snd_util_memhdr_t *hdr)
80 {
81         snd_emux_t *emu = private_data;
82         return emu->ops.sample_free(emu, sp, hdr);
83         
84 }
85
86 static void sf_sample_reset(void *private_data)
87 {
88         snd_emux_t *emu = private_data;
89         emu->ops.sample_reset(emu);
90 }
91
92 int snd_emux_register(snd_emux_t *emu, snd_card_t *card, int index, char *name)
93 {
94         int err;
95         snd_sf_callback_t sf_cb;
96
97         snd_assert(emu->hw != NULL, return -EINVAL);
98         snd_assert(emu->max_voices > 0, return -EINVAL);
99         snd_assert(card != NULL, return -EINVAL);
100         snd_assert(name != NULL, return -EINVAL);
101
102         emu->card = card;
103         emu->name = kstrdup(name, GFP_KERNEL);
104         emu->voices = kcalloc(emu->max_voices, sizeof(snd_emux_voice_t), GFP_KERNEL);
105         if (emu->voices == NULL)
106                 return -ENOMEM;
107
108         /* create soundfont list */
109         memset(&sf_cb, 0, sizeof(sf_cb));
110         sf_cb.private_data = emu;
111         if (emu->ops.sample_new)
112                 sf_cb.sample_new = sf_sample_new;
113         if (emu->ops.sample_free)
114                 sf_cb.sample_free = sf_sample_free;
115         if (emu->ops.sample_reset)
116                 sf_cb.sample_reset = sf_sample_reset;
117         emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
118         if (emu->sflist == NULL)
119                 return -ENOMEM;
120
121         if ((err = snd_emux_init_hwdep(emu)) < 0)
122                 return err;
123
124         snd_emux_init_voices(emu);
125
126         snd_emux_init_seq(emu, card, index);
127 #ifdef CONFIG_SND_SEQUENCER_OSS
128         snd_emux_init_seq_oss(emu);
129 #endif
130         snd_emux_init_virmidi(emu, card);
131
132 #ifdef CONFIG_PROC_FS
133         snd_emux_proc_init(emu, card, index);
134 #endif
135         return 0;
136 }
137
138
139 /*
140  */
141 int snd_emux_free(snd_emux_t *emu)
142 {
143         unsigned long flags;
144
145         if (! emu)
146                 return -EINVAL;
147
148         spin_lock_irqsave(&emu->voice_lock, flags);
149         if (emu->timer_active)
150                 del_timer(&emu->tlist);
151         spin_unlock_irqrestore(&emu->voice_lock, flags);
152
153 #ifdef CONFIG_PROC_FS
154         snd_emux_proc_free(emu);
155 #endif
156         snd_emux_delete_virmidi(emu);
157 #ifdef CONFIG_SND_SEQUENCER_OSS
158         snd_emux_detach_seq_oss(emu);
159 #endif
160         snd_emux_detach_seq(emu);
161
162         snd_emux_delete_hwdep(emu);
163
164         if (emu->sflist)
165                 snd_sf_free(emu->sflist);
166
167         kfree(emu->voices);
168         kfree(emu->name);
169         kfree(emu);
170         return 0;
171 }
172
173
174 EXPORT_SYMBOL(snd_emux_new);
175 EXPORT_SYMBOL(snd_emux_register);
176 EXPORT_SYMBOL(snd_emux_free);
177
178 EXPORT_SYMBOL(snd_emux_terminate_all);
179 EXPORT_SYMBOL(snd_emux_lock_voice);
180 EXPORT_SYMBOL(snd_emux_unlock_voice);
181
182 /* soundfont.c */
183 EXPORT_SYMBOL(snd_sf_linear_to_log);
184
185
186 /*
187  *  INIT part
188  */
189
190 static int __init alsa_emux_init(void)
191 {
192         return 0;
193 }
194
195 static void __exit alsa_emux_exit(void)
196 {
197 }
198
199 module_init(alsa_emux_init)
200 module_exit(alsa_emux_exit)