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;
  61         gfp_t gfp_mask;
  62         unsigned int real_size;
  63
  64         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
  65                 return -EINVAL;
  66         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
  67         /* copy instrument data */
  68         if (len < (long)sizeof(ix))
  69                 return -EINVAL;
  70         if (copy_from_user(&ix, instr_data, sizeof(ix)))
  71                 return -EFAULT;
  72         if (ix.stype != SIMPLE_STRU_INSTR)
  73                 return -EINVAL;
  74         instr_data += sizeof(ix);
  75         len -= sizeof(ix);
  76         ip = (simple_instrument_t *)KINSTR_DATA(instr);
  77         ip->share_id[0] = le32_to_cpu(ix.share_id[0]);
  78         ip->share_id[1] = le32_to_cpu(ix.share_id[1]);
  79         ip->share_id[2] = le32_to_cpu(ix.share_id[2]);
  80         ip->share_id[3] = le32_to_cpu(ix.share_id[3]);
  81         ip->format = le32_to_cpu(ix.format);
  82         ip->size = le32_to_cpu(ix.size);
  83         ip->start = le32_to_cpu(ix.start);
  84         ip->loop_start = le32_to_cpu(ix.loop_start);
  85         ip->loop_end = le32_to_cpu(ix.loop_end);
  86         ip->loop_repeat = le16_to_cpu(ix.loop_repeat);
  87         ip->effect1 = ix.effect1;
  88         ip->effect1_depth = ix.effect1_depth;
  89         ip->effect2 = ix.effect2;
  90         ip->effect2_depth = ix.effect2_depth;
  91         real_size = snd_seq_simple_size(ip->size, ip->format);
  92         if (len < (long)real_size)
  93                 return -EINVAL;
  94         if (ops->put_sample) {
  95                 err = ops->put_sample(ops->private_data, ip,
  96                                       instr_data, real_size, atomic);
  97                 if (err < 0)
  98                         return err;
  99         }
 100         return 0;
 101 }
 102
 103 static int snd_seq_simple_get(void *private_data, snd_seq_kinstr_t *instr,
 104                               char __user *instr_data, long len,
 105                               int atomic, int cmd)
 106 {
 107         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 108         simple_instrument_t *ip;
 109         simple_xinstrument_t ix;
 110         int err;
 111         unsigned int real_size;
 112
 113         if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
 114                 return -EINVAL;
 115         if (len < (long)sizeof(ix))
 116                 return -ENOMEM;
 117         memset(&ix, 0, sizeof(ix));
 118         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 119         ix.stype = SIMPLE_STRU_INSTR;
 120         ix.share_id[0] = cpu_to_le32(ip->share_id[0]);
 121         ix.share_id[1] = cpu_to_le32(ip->share_id[1]);
 122         ix.share_id[2] = cpu_to_le32(ip->share_id[2]);
 123         ix.share_id[3] = cpu_to_le32(ip->share_id[3]);
 124         ix.format = cpu_to_le32(ip->format);
 125         ix.size = cpu_to_le32(ip->size);
 126         ix.start = cpu_to_le32(ip->start);
 127         ix.loop_start = cpu_to_le32(ip->loop_start);
 128         ix.loop_end = cpu_to_le32(ip->loop_end);
 129         ix.loop_repeat = cpu_to_le32(ip->loop_repeat);
 130         ix.effect1 = cpu_to_le16(ip->effect1);
 131         ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
 132         ix.effect2 = ip->effect2;
 133         ix.effect2_depth = ip->effect2_depth;
 134         if (copy_to_user(instr_data, &ix, sizeof(ix)))
 135                 return -EFAULT;
 136         instr_data += sizeof(ix);
 137         len -= sizeof(ix);
 138         real_size = snd_seq_simple_size(ip->size, ip->format);
 139         if (len < (long)real_size)
 140                 return -ENOMEM;
 141         if (ops->get_sample) {
 142                 err = ops->get_sample(ops->private_data, ip,
 143                                       instr_data, real_size, atomic);
 144                 if (err < 0)
 145                         return err;
 146         }
 147         return 0;
 148 }
 149
 150 static int snd_seq_simple_get_size(void *private_data, snd_seq_kinstr_t *instr,
 151                                    long *size)
 152 {
 153         simple_instrument_t *ip;
 154
 155         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 156         *size = sizeof(simple_xinstrument_t) + snd_seq_simple_size(ip->size, ip->format);
 157         return 0;
 158 }
 159
 160 static int snd_seq_simple_remove(void *private_data,
 161                                  snd_seq_kinstr_t *instr,
 162                                  int atomic)
 163 {
 164         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 165         simple_instrument_t *ip;
 166
 167         ip = (simple_instrument_t *)KINSTR_DATA(instr);
 168         snd_seq_simple_instr_free(ops, ip, atomic);
 169         return 0;
 170 }
 171
 172 static void snd_seq_simple_notify(void *private_data,
 173                                   snd_seq_kinstr_t *instr,
 174                                   int what)
 175 {
 176         snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
 177
 178         if (ops->notify)
 179                 ops->notify(ops->private_data, instr, what);
 180 }
 181
 182 int snd_seq_simple_init(snd_simple_ops_t *ops,
 183                         void *private_data,
 184                         snd_seq_kinstr_ops_t *next)
 185 {
 186         memset(ops, 0, sizeof(*ops));
 187         ops->private_data = private_data;
 188         ops->kops.private_data = ops;
 189         ops->kops.add_len = sizeof(simple_instrument_t);
 190         ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_SIMPLE;
 191         ops->kops.put = snd_seq_simple_put;
 192         ops->kops.get = snd_seq_simple_get;
 193         ops->kops.get_size = snd_seq_simple_get_size;
 194         ops->kops.remove = snd_seq_simple_remove;
 195         ops->kops.notify = snd_seq_simple_notify;
 196         ops->kops.next = next;
 197         return 0;
 198 }
 199
 200 /*
 201  *  Init part
 202  */
 203
 204 static int __init alsa_ainstr_simple_init(void)
 205 {
 206         return 0;
 207 }
 208
 209 static void __exit alsa_ainstr_simple_exit(void)
 210 {
 211 }
 212
 213 module_init(alsa_ainstr_simple_init)
 214 module_exit(alsa_ainstr_simple_exit)
 215
 216 EXPORT_SYMBOL(snd_seq_simple_init);