sound/core/seq/instr/ainstr_simple.c

   1 /*
   2  *   Simple (MOD player) - Instrument routines
   3  *   Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  */
  20
  21 #include <sound/driver.h>
  22 #include <linux/init.h>
  23 #include <linux/sched.h>
  24 #include <linux/slab.h>
  25 #include <sound/core.h>
  26 #include <sound/ainstr_simple.h>
  27 #include <sound/initval.h>
  28 #include <asm/uaccess.h>
  29
  30 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  31 MODULE_DESCRIPTION("Advanced Linux Sound Architecture Simple Instrument support.");
  32 MODULE_LICENSE("GPL");
  33
  34 static unsigned int snd_seq_simple_size(unsigned int size, unsigned int format)
  35 {
  36         unsigned int result = size;
  37
  38         if (format & SIMPLE_WAVE_16BIT)
  39                 result <<= 1;
  40         if (format & SIMPLE_WAVE_STEREO)
  41                 result <<= 1;
  42         return result;
  43 }
  44
  45 static void snd_seq_simple_instr_free(snd_simple_ops_t *ops,
  46                                       simple_instrument_t *ip,
  47                                       int atomic)
  48 {
  49         if (ops->remove_sample)
  50                 ops->remove_sample(ops->private_data, ip, atomic);
  51 }
  52
  53 static int snd_seq_simple_put(void *private_data, snd_seq_kinstr_t *instr,
  54                               char __user *instr_data, long len,
  55                               int atomic, int cmd)
  56 {
  57         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
  58         simple_instrument_t *ip;
  59         simple_xinstrument_t ix;
  60         int err, gfp_mask;
  61         unsigned int real_size;
  62
  63         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
  64                 return -EINVAL;
  65         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
  66         /* copy instrument data */
  67         if (len < (long)sizeof(ix))
  68                 return -EINVAL;
  69         if (copy_from_user(&ix, instr_data, sizeof(ix)))
  70                 return -EFAULT;
  71         if (ix.stype != SIMPLE_STRU_INSTR)
  72                 return -EINVAL;
  73         instr_data += sizeof(ix);
  74         len -= sizeof(ix);
  75         ip = (simple_instrument_t *)KINSTR_DATA(instr);
  76         ip->share_id[0] = le32_to_cpu(ix.share_id[0]);
  77         ip->share_id[1] = le32_to_cpu(ix.share_id[1]);
  78         ip->share_id[2] = le32_to_cpu(ix.share_id[2]);
  79         ip->share_id[3] = le32_to_cpu(ix.share_id[3]);
  80         ip->format = le32_to_cpu(ix.format);
  81         ip->size = le32_to_cpu(ix.size);
  82         ip->start = le32_to_cpu(ix.start);
  83         ip->loop_start = le32_to_cpu(ix.loop_start);
  84         ip->loop_end = le32_to_cpu(ix.loop_end);
  85         ip->loop_repeat = le16_to_cpu(ix.loop_repeat);
  86         ip->effect1 = ix.effect1;
  87         ip->effect1_depth = ix.effect1_depth;
  88         ip->effect2 = ix.effect2;
  89         ip->effect2_depth = ix.effect2_depth;
  90         real_size = snd_seq_simple_size(ip->size, ip->format);
  91         if (len < (long)real_size)
  92                 return -EINVAL;
  93         if (ops->put_sample) {
  94                 err = ops->put_sample(ops->private_data, ip,
  95                                       instr_data, real_size, atomic);
  96                 if (err < 0)
  97                         return err;
  98         }
  99         return 0;
 100 }
 101
 102 static int snd_seq_simple_get(void *private_data, snd_seq_kinstr_t *instr,
 103                               char __user *instr_data, long len,
 104                               int atomic, int cmd)
 105 {
 106         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 107         simple_instrument_t *ip;
 108         simple_xinstrument_t ix;
 109         int err;
 110         unsigned int real_size;
 111
 112         if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
 113                 return -EINVAL;
 114         if (len < (long)sizeof(ix))
 115                 return -ENOMEM;
 116         memset(&ix, 0, sizeof(ix));
 117         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 118         ix.stype = SIMPLE_STRU_INSTR;
 119         ix.share_id[0] = cpu_to_le32(ip->share_id[0]);
 120         ix.share_id[1] = cpu_to_le32(ip->share_id[1]);
 121         ix.share_id[2] = cpu_to_le32(ip->share_id[2]);
 122         ix.share_id[3] = cpu_to_le32(ip->share_id[3]);
 123         ix.format = cpu_to_le32(ip->format);
 124         ix.size = cpu_to_le32(ip->size);
 125         ix.start = cpu_to_le32(ip->start);
 126         ix.loop_start = cpu_to_le32(ip->loop_start);
 127         ix.loop_end = cpu_to_le32(ip->loop_end);
 128         ix.loop_repeat = cpu_to_le32(ip->loop_repeat);
 129         ix.effect1 = cpu_to_le16(ip->effect1);
 130         ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
 131         ix.effect2 = ip->effect2;
 132         ix.effect2_depth = ip->effect2_depth;
 133         if (copy_to_user(instr_data, &ix, sizeof(ix)))
 134                 return -EFAULT;
 135         instr_data += sizeof(ix);
 136         len -= sizeof(ix);
 137         real_size = snd_seq_simple_size(ip->size, ip->format);
 138         if (len < (long)real_size)
 139                 return -ENOMEM;
 140         if (ops->get_sample) {
 141                 err = ops->get_sample(ops->private_data, ip,
 142                                       instr_data, real_size, atomic);
 143                 if (err < 0)
 144                         return err;
 145         }
 146         return 0;
 147 }
 148
 149 static int snd_seq_simple_get_size(void *private_data, snd_seq_kinstr_t *instr,
 150                                    long *size)
 151 {
 152         simple_instrument_t *ip;
 153
 154         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 155         *size = sizeof(simple_xinstrument_t) + snd_seq_simple_size(ip->size, ip->format);
 156         return 0;
 157 }
 158
 159 static int snd_seq_simple_remove(void *private_data,
 160                                  snd_seq_kinstr_t *instr,
 161                                  int atomic)
 162 {
 163         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 164         simple_instrument_t *ip;
 165
 166         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 167         snd_seq_simple_instr_free(ops, ip, atomic);
 168         return 0;
 169 }
 170
 171 static void snd_seq_simple_notify(void *private_data,
 172                                   snd_seq_kinstr_t *instr,
 173                                   int what)
 174 {
 175         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 176
 177         if (ops->notify)
 178                 ops->notify(ops->private_data, instr, what);
 179 }
 180
 181 int snd_seq_simple_init(snd_simple_ops_t *ops,
 182                         void *private_data,
 183                         snd_seq_kinstr_ops_t *next)
 184 {
 185         memset(ops, 0, sizeof(*ops));
 186         ops->private_data = private_data;
 187         ops->kops.private_data = ops;
 188         ops->kops.add_len = sizeof(simple_instrument_t);
 189         ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_SIMPLE;
 190         ops->kops.put = snd_seq_simple_put;
 191         ops->kops.get = snd_seq_simple_get;
 192         ops->kops.get_size = snd_seq_simple_get_size;
 193         ops->kops.remove = snd_seq_simple_remove;
 194         ops->kops.notify = snd_seq_simple_notify;
 195         ops->kops.next = next;
 196         return 0;
 197 }
 198
 199 /*
 200  *  Init part
 201  */
 202
 203 static int __init alsa_ainstr_simple_init(void)
 204 {
 205         return 0;
 206 }
 207
 208 static void __exit alsa_ainstr_simple_exit(void)
 209 {
 210 }
 211
 212 module_init(alsa_ainstr_simple_init)
 213 module_exit(alsa_ainstr_simple_exit)
 214
 215 EXPORT_SYMBOL(snd_seq_simple_init);