sound/core/seq/instr/ainstr_gf1.c

   1 /*
   2  *   GF1 (GUS) Patch - 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_gf1.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 GF1 (GUS) Patch support.");
  32 MODULE_LICENSE("GPL");
  33
  34 static unsigned int snd_seq_gf1_size(unsigned int size, unsigned int format)
  35 {
  36         unsigned int result = size;
  37
  38         if (format & GF1_WAVE_16BIT)
  39                 result <<= 1;
  40         if (format & GF1_WAVE_STEREO)
  41                 result <<= 1;
  42         return format;
  43 }
  44
  45 static int snd_seq_gf1_copy_wave_from_stream(snd_gf1_ops_t *ops,
  46                                              gf1_instrument_t *ip,
  47                                              char __user **data,
  48                                              long *len,
  49                                              int atomic)
  50 {
  51         gf1_wave_t *wp, *prev;
  52         gf1_xwave_t xp;
  53         int err, gfp_mask;
  54         unsigned int real_size;
  55
  56         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
  57         if (*len < (long)sizeof(xp))
  58                 return -EINVAL;
  59         if (copy_from_user(&xp, *data, sizeof(xp)))
  60                 return -EFAULT;
  61         *data += sizeof(xp);
  62         *len -= sizeof(xp);
  63         wp = kcalloc(1, sizeof(*wp), gfp_mask);
  64         if (wp == NULL)
  65                 return -ENOMEM;
  66         wp->share_id[0] = le32_to_cpu(xp.share_id[0]);
  67         wp->share_id[1] = le32_to_cpu(xp.share_id[1]);
  68         wp->share_id[2] = le32_to_cpu(xp.share_id[2]);
  69         wp->share_id[3] = le32_to_cpu(xp.share_id[3]);
  70         wp->format = le32_to_cpu(xp.format);
  71         wp->size = le32_to_cpu(xp.size);
  72         wp->start = le32_to_cpu(xp.start);
  73         wp->loop_start = le32_to_cpu(xp.loop_start);
  74         wp->loop_end = le32_to_cpu(xp.loop_end);
  75         wp->loop_repeat = le16_to_cpu(xp.loop_repeat);
  76         wp->flags = xp.flags;
  77         wp->sample_rate = le32_to_cpu(xp.sample_rate);
  78         wp->low_frequency = le32_to_cpu(xp.low_frequency);
  79         wp->high_frequency = le32_to_cpu(xp.high_frequency);
  80         wp->root_frequency = le32_to_cpu(xp.root_frequency);
  81         wp->tune = le16_to_cpu(xp.tune);
  82         wp->balance = xp.balance;
  83         memcpy(wp->envelope_rate, xp.envelope_rate, 6);
  84         memcpy(wp->envelope_offset, xp.envelope_offset, 6);
  85         wp->tremolo_sweep = xp.tremolo_sweep;
  86         wp->tremolo_rate = xp.tremolo_rate;
  87         wp->tremolo_depth = xp.tremolo_depth;
  88         wp->vibrato_sweep = xp.vibrato_sweep;
  89         wp->vibrato_rate = xp.vibrato_rate;
  90         wp->vibrato_depth = xp.vibrato_depth;
  91         wp->scale_frequency = le16_to_cpu(xp.scale_frequency);
  92         wp->scale_factor = le16_to_cpu(xp.scale_factor);
  93         real_size = snd_seq_gf1_size(wp->size, wp->format);
  94         if ((long)real_size > *len) {
  95                 kfree(wp);
  96                 return -ENOMEM;
  97         }
  98         if (ops->put_sample) {
  99                 err = ops->put_sample(ops->private_data, wp,
 100                                       *data, real_size, atomic);
 101                 if (err < 0) {
 102                         kfree(wp);
 103                         return err;
 104                 }
 105         }
 106         *data += real_size;
 107         *len -= real_size;
 108         prev = ip->wave;
 109         if (prev) {
 110                 while (prev->next) prev = prev->next;
 111                 prev->next = wp;
 112         } else {
 113                 ip->wave = wp;
 114         }
 115         return 0;
 116 }
 117
 118 static void snd_seq_gf1_wave_free(snd_gf1_ops_t *ops,
 119                                   gf1_wave_t *wave,
 120                                   int atomic)
 121 {
 122         if (ops->remove_sample)
 123                 ops->remove_sample(ops->private_data, wave, atomic);
 124         kfree(wave);
 125 }
 126
 127 static void snd_seq_gf1_instr_free(snd_gf1_ops_t *ops,
 128                                    gf1_instrument_t *ip,
 129                                    int atomic)
 130 {
 131         gf1_wave_t *wave;
 132
 133         while ((wave = ip->wave) != NULL) {
 134                 ip->wave = wave->next;
 135                 snd_seq_gf1_wave_free(ops, wave, atomic);
 136         }
 137 }
 138
 139 static int snd_seq_gf1_put(void *private_data, snd_seq_kinstr_t *instr,
 140                            char __user *instr_data, long len, int atomic,
 141                            int cmd)
 142 {
 143         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 144         gf1_instrument_t *ip;
 145         gf1_xinstrument_t ix;
 146         int err, gfp_mask;
 147
 148         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
 149                 return -EINVAL;
 150         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
 151         /* copy instrument data */
 152         if (len < (long)sizeof(ix))
 153                 return -EINVAL;
 154         if (copy_from_user(&ix, instr_data, sizeof(ix)))
 155                 return -EFAULT;
 156         if (ix.stype != GF1_STRU_INSTR)
 157                 return -EINVAL;
 158         instr_data += sizeof(ix);
 159         len -= sizeof(ix);
 160         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 161         ip->exclusion = le16_to_cpu(ix.exclusion);
 162         ip->exclusion_group = le16_to_cpu(ix.exclusion_group);
 163         ip->effect1 = ix.effect1;
 164         ip->effect1_depth = ix.effect1_depth;
 165         ip->effect2 = ix.effect2;
 166         ip->effect2_depth = ix.effect2_depth;
 167         /* copy layers */
 168         while (len > (long)sizeof(__u32)) {
 169                 __u32 stype;
 170
 171                 if (copy_from_user(&stype, instr_data, sizeof(stype)))
 172                         return -EFAULT;
 173                 if (stype != GF1_STRU_WAVE) {
 174                         snd_seq_gf1_instr_free(ops, ip, atomic);
 175                         return -EINVAL;
 176                 }
 177                 err = snd_seq_gf1_copy_wave_from_stream(ops,
 178                                                         ip,
 179                                                         &instr_data,
 180                                                         &len,
 181                                                         atomic);
 182                 if (err < 0) {
 183                         snd_seq_gf1_instr_free(ops, ip, atomic);
 184                         return err;
 185                 }
 186         }
 187         return 0;
 188 }
 189
 190 static int snd_seq_gf1_copy_wave_to_stream(snd_gf1_ops_t *ops,
 191                                            gf1_instrument_t *ip,
 192                                            char __user **data,
 193                                            long *len,
 194                                            int atomic)
 195 {
 196         gf1_wave_t *wp;
 197         gf1_xwave_t xp;
 198         int err;
 199         unsigned int real_size;
 200
 201         for (wp = ip->wave; wp; wp = wp->next) {
 202                 if (*len < (long)sizeof(xp))
 203                         return -ENOMEM;
 204                 memset(&xp, 0, sizeof(xp));
 205                 xp.stype = GF1_STRU_WAVE;
 206                 xp.share_id[0] = cpu_to_le32(wp->share_id[0]);
 207                 xp.share_id[1] = cpu_to_le32(wp->share_id[1]);
 208                 xp.share_id[2] = cpu_to_le32(wp->share_id[2]);
 209                 xp.share_id[3] = cpu_to_le32(wp->share_id[3]);
 210                 xp.format = cpu_to_le32(wp->format);
 211                 xp.size = cpu_to_le32(wp->size);
 212                 xp.start = cpu_to_le32(wp->start);
 213                 xp.loop_start = cpu_to_le32(wp->loop_start);
 214                 xp.loop_end = cpu_to_le32(wp->loop_end);
 215                 xp.loop_repeat = cpu_to_le32(wp->loop_repeat);
 216                 xp.flags = wp->flags;
 217                 xp.sample_rate = cpu_to_le32(wp->sample_rate);
 218                 xp.low_frequency = cpu_to_le32(wp->low_frequency);
 219                 xp.high_frequency = cpu_to_le32(wp->high_frequency);
 220                 xp.root_frequency = cpu_to_le32(wp->root_frequency);
 221                 xp.tune = cpu_to_le16(wp->tune);
 222                 xp.balance = wp->balance;
 223                 memcpy(xp.envelope_rate, wp->envelope_rate, 6);
 224                 memcpy(xp.envelope_offset, wp->envelope_offset, 6);
 225                 xp.tremolo_sweep = wp->tremolo_sweep;
 226                 xp.tremolo_rate = wp->tremolo_rate;
 227                 xp.tremolo_depth = wp->tremolo_depth;
 228                 xp.vibrato_sweep = wp->vibrato_sweep;
 229                 xp.vibrato_rate = wp->vibrato_rate;
 230                 xp.vibrato_depth = wp->vibrato_depth;
 231                 xp.scale_frequency = cpu_to_le16(wp->scale_frequency);
 232                 xp.scale_factor = cpu_to_le16(wp->scale_factor);
 233                 if (copy_to_user(*data, &xp, sizeof(xp)))
 234                         return -EFAULT;
 235                 *data += sizeof(xp);
 236                 *len -= sizeof(xp);
 237                 real_size = snd_seq_gf1_size(wp->size, wp->format);
 238                 if (*len < (long)real_size)
 239                         return -ENOMEM;
 240                 if (ops->get_sample) {
 241                         err = ops->get_sample(ops->private_data, wp,
 242                                               *data, real_size, atomic);
 243                         if (err < 0)
 244                                 return err;
 245                 }
 246                 *data += wp->size;
 247                 *len -= wp->size;
 248         }
 249         return 0;
 250 }
 251
 252 static int snd_seq_gf1_get(void *private_data, snd_seq_kinstr_t *instr,
 253                            char __user *instr_data, long len, int atomic,
 254                            int cmd)
 255 {
 256         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 257         gf1_instrument_t *ip;
 258         gf1_xinstrument_t ix;
 259
 260         if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
 261                 return -EINVAL;
 262         if (len < (long)sizeof(ix))
 263                 return -ENOMEM;
 264         memset(&ix, 0, sizeof(ix));
 265         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 266         ix.stype = GF1_STRU_INSTR;
 267         ix.exclusion = cpu_to_le16(ip->exclusion);
 268         ix.exclusion_group = cpu_to_le16(ip->exclusion_group);
 269         ix.effect1 = cpu_to_le16(ip->effect1);
 270         ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
 271         ix.effect2 = ip->effect2;
 272         ix.effect2_depth = ip->effect2_depth;
 273         if (copy_to_user(instr_data, &ix, sizeof(ix)))
 274                 return -EFAULT;
 275         instr_data += sizeof(ix);
 276         len -= sizeof(ix);
 277         return snd_seq_gf1_copy_wave_to_stream(ops,
 278                                                ip,
 279                                                &instr_data,
 280                                                &len,
 281                                                atomic);
 282 }
 283
 284 static int snd_seq_gf1_get_size(void *private_data, snd_seq_kinstr_t *instr,
 285                                 long *size)
 286 {
 287         long result;
 288         gf1_instrument_t *ip;
 289         gf1_wave_t *wp;
 290
 291         *size = 0;
 292         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 293         result = sizeof(gf1_xinstrument_t);
 294         for (wp = ip->wave; wp; wp = wp->next) {
 295                 result += sizeof(gf1_xwave_t);
 296                 result += wp->size;
 297         }
 298         *size = result;
 299         return 0;
 300 }
 301
 302 static int snd_seq_gf1_remove(void *private_data,
 303                               snd_seq_kinstr_t *instr,
 304                               int atomic)
 305 {
 306         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 307         gf1_instrument_t *ip;
 308
 309         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 310         snd_seq_gf1_instr_free(ops, ip, atomic);
 311         return 0;
 312 }
 313
 314 static void snd_seq_gf1_notify(void *private_data,
 315                                snd_seq_kinstr_t *instr,
 316                                int what)
 317 {
 318         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 319
 320         if (ops->notify)
 321                 ops->notify(ops->private_data, instr, what);
 322 }
 323
 324 int snd_seq_gf1_init(snd_gf1_ops_t *ops,
 325                      void *private_data,
 326                      snd_seq_kinstr_ops_t *next)
 327 {
 328         memset(ops, 0, sizeof(*ops));
 329         ops->private_data = private_data;
 330         ops->kops.private_data = ops;
 331         ops->kops.add_len = sizeof(gf1_instrument_t);
 332         ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_GUS_PATCH;
 333         ops->kops.put = snd_seq_gf1_put;
 334         ops->kops.get = snd_seq_gf1_get;
 335         ops->kops.get_size = snd_seq_gf1_get_size;
 336         ops->kops.remove = snd_seq_gf1_remove;
 337         ops->kops.notify = snd_seq_gf1_notify;
 338         ops->kops.next = next;
 339         return 0;
 340 }
 341
 342 /*
 343  *  Init part
 344  */
 345
 346 static int __init alsa_ainstr_gf1_init(void)
 347 {
 348         return 0;
 349 }
 350
 351 static void __exit alsa_ainstr_gf1_exit(void)
 352 {
 353 }
 354
 355 module_init(alsa_ainstr_gf1_init)
 356 module_exit(alsa_ainstr_gf1_exit)
 357
 358 EXPORT_SYMBOL(snd_seq_gf1_init);