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 char *snd_seq_gf1_id = SNDRV_SEQ_INSTR_ID_GUS_PATCH;
  35
  36 static unsigned int snd_seq_gf1_size(unsigned int size, unsigned int format)
  37 {
  38         unsigned int result = size;
  39
  40         if (format & GF1_WAVE_16BIT)
  41                 result <<= 1;
  42         if (format & GF1_WAVE_STEREO)
  43                 result <<= 1;
  44         return format;
  45 }
  46
  47 static int snd_seq_gf1_copy_wave_from_stream(snd_gf1_ops_t *ops,
  48                                              gf1_instrument_t *ip,
  49                                              char __user **data,
  50                                              long *len,
  51                                              int atomic)
  52 {
  53         gf1_wave_t *wp, *prev;
  54         gf1_xwave_t xp;
  55         int err, gfp_mask;
  56         unsigned int real_size;
  57
  58         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
  59         if (*len < (long)sizeof(xp))
  60                 return -EINVAL;
  61         if (copy_from_user(&xp, *data, sizeof(xp)))
  62                 return -EFAULT;
  63         *data += sizeof(xp);
  64         *len -= sizeof(xp);
  65         wp = kcalloc(1, sizeof(*wp), gfp_mask);
  66         if (wp == NULL)
  67                 return -ENOMEM;
  68         wp->share_id[0] = le32_to_cpu(xp.share_id[0]);
  69         wp->share_id[1] = le32_to_cpu(xp.share_id[1]);
  70         wp->share_id[2] = le32_to_cpu(xp.share_id[2]);
  71         wp->share_id[3] = le32_to_cpu(xp.share_id[3]);
  72         wp->format = le32_to_cpu(xp.format);
  73         wp->size = le32_to_cpu(xp.size);
  74         wp->start = le32_to_cpu(xp.start);
  75         wp->loop_start = le32_to_cpu(xp.loop_start);
  76         wp->loop_end = le32_to_cpu(xp.loop_end);
  77         wp->loop_repeat = le16_to_cpu(xp.loop_repeat);
  78         wp->flags = xp.flags;
  79         wp->sample_rate = le32_to_cpu(xp.sample_rate);
  80         wp->low_frequency = le32_to_cpu(xp.low_frequency);
  81         wp->high_frequency = le32_to_cpu(xp.high_frequency);
  82         wp->root_frequency = le32_to_cpu(xp.root_frequency);
  83         wp->tune = le16_to_cpu(xp.tune);
  84         wp->balance = xp.balance;
  85         memcpy(wp->envelope_rate, xp.envelope_rate, 6);
  86         memcpy(wp->envelope_offset, xp.envelope_offset, 6);
  87         wp->tremolo_sweep = xp.tremolo_sweep;
  88         wp->tremolo_rate = xp.tremolo_rate;
  89         wp->tremolo_depth = xp.tremolo_depth;
  90         wp->vibrato_sweep = xp.vibrato_sweep;
  91         wp->vibrato_rate = xp.vibrato_rate;
  92         wp->vibrato_depth = xp.vibrato_depth;
  93         wp->scale_frequency = le16_to_cpu(xp.scale_frequency);
  94         wp->scale_factor = le16_to_cpu(xp.scale_factor);
  95         real_size = snd_seq_gf1_size(wp->size, wp->format);
  96         if ((long)real_size > *len) {
  97                 kfree(wp);
  98                 return -ENOMEM;
  99         }
 100         if (ops->put_sample) {
 101                 err = ops->put_sample(ops->private_data, wp,
 102                                       *data, real_size, atomic);
 103                 if (err < 0) {
 104                         kfree(wp);
 105                         return err;
 106                 }
 107         }
 108         *data += real_size;
 109         *len -= real_size;
 110         prev = ip->wave;
 111         if (prev) {
 112                 while (prev->next) prev = prev->next;
 113                 prev->next = wp;
 114         } else {
 115                 ip->wave = wp;
 116         }
 117         return 0;
 118 }
 119
 120 static void snd_seq_gf1_wave_free(snd_gf1_ops_t *ops,
 121                                   gf1_wave_t *wave,
 122                                   int atomic)
 123 {
 124         if (ops->remove_sample)
 125                 ops->remove_sample(ops->private_data, wave, atomic);
 126         kfree(wave);
 127 }
 128
 129 static void snd_seq_gf1_instr_free(snd_gf1_ops_t *ops,
 130                                    gf1_instrument_t *ip,
 131                                    int atomic)
 132 {
 133         gf1_wave_t *wave;
 134
 135         while ((wave = ip->wave) != NULL) {
 136                 ip->wave = wave->next;
 137                 snd_seq_gf1_wave_free(ops, wave, atomic);
 138         }
 139 }
 140
 141 static int snd_seq_gf1_put(void *private_data, snd_seq_kinstr_t *instr,
 142                            char __user *instr_data, long len, int atomic,
 143                            int cmd)
 144 {
 145         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 146         gf1_instrument_t *ip;
 147         gf1_xinstrument_t ix;
 148         int err, gfp_mask;
 149
 150         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
 151                 return -EINVAL;
 152         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
 153         /* copy instrument data */
 154         if (len < (long)sizeof(ix))
 155                 return -EINVAL;
 156         if (copy_from_user(&ix, instr_data, sizeof(ix)))
 157                 return -EFAULT;
 158         if (ix.stype != GF1_STRU_INSTR)
 159                 return -EINVAL;
 160         instr_data += sizeof(ix);
 161         len -= sizeof(ix);
 162         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 163         ip->exclusion = le16_to_cpu(ix.exclusion);
 164         ip->exclusion_group = le16_to_cpu(ix.exclusion_group);
 165         ip->effect1 = ix.effect1;
 166         ip->effect1_depth = ix.effect1_depth;
 167         ip->effect2 = ix.effect2;
 168         ip->effect2_depth = ix.effect2_depth;
 169         /* copy layers */
 170         while (len > (long)sizeof(__u32)) {
 171                 __u32 stype;
 172
 173                 if (copy_from_user(&stype, instr_data, sizeof(stype)))
 174                         return -EFAULT;
 175                 if (stype != GF1_STRU_WAVE) {
 176                         snd_seq_gf1_instr_free(ops, ip, atomic);
 177                         return -EINVAL;
 178                 }
 179                 err = snd_seq_gf1_copy_wave_from_stream(ops,
 180                                                         ip,
 181                                                         &instr_data,
 182                                                         &len,
 183                                                         atomic);
 184                 if (err < 0) {
 185                         snd_seq_gf1_instr_free(ops, ip, atomic);
 186                         return err;
 187                 }
 188         }
 189         return 0;
 190 }
 191
 192 static int snd_seq_gf1_copy_wave_to_stream(snd_gf1_ops_t *ops,
 193                                            gf1_instrument_t *ip,
 194                                            char __user **data,
 195                                            long *len,
 196                                            int atomic)
 197 {
 198         gf1_wave_t *wp;
 199         gf1_xwave_t xp;
 200         int err;
 201         unsigned int real_size;
 202
 203         for (wp = ip->wave; wp; wp = wp->next) {
 204                 if (*len < (long)sizeof(xp))
 205                         return -ENOMEM;
 206                 memset(&xp, 0, sizeof(xp));
 207                 xp.stype = GF1_STRU_WAVE;
 208                 xp.share_id[0] = cpu_to_le32(wp->share_id[0]);
 209                 xp.share_id[1] = cpu_to_le32(wp->share_id[1]);
 210                 xp.share_id[2] = cpu_to_le32(wp->share_id[2]);
 211                 xp.share_id[3] = cpu_to_le32(wp->share_id[3]);
 212                 xp.format = cpu_to_le32(wp->format);
 213                 xp.size = cpu_to_le32(wp->size);
 214                 xp.start = cpu_to_le32(wp->start);
 215                 xp.loop_start = cpu_to_le32(wp->loop_start);
 216                 xp.loop_end = cpu_to_le32(wp->loop_end);
 217                 xp.loop_repeat = cpu_to_le32(wp->loop_repeat);
 218                 xp.flags = wp->flags;
 219                 xp.sample_rate = cpu_to_le32(wp->sample_rate);
 220                 xp.low_frequency = cpu_to_le32(wp->low_frequency);
 221                 xp.high_frequency = cpu_to_le32(wp->high_frequency);
 222                 xp.root_frequency = cpu_to_le32(wp->root_frequency);
 223                 xp.tune = cpu_to_le16(wp->tune);
 224                 xp.balance = wp->balance;
 225                 memcpy(xp.envelope_rate, wp->envelope_rate, 6);
 226                 memcpy(xp.envelope_offset, wp->envelope_offset, 6);
 227                 xp.tremolo_sweep = wp->tremolo_sweep;
 228                 xp.tremolo_rate = wp->tremolo_rate;
 229                 xp.tremolo_depth = wp->tremolo_depth;
 230                 xp.vibrato_sweep = wp->vibrato_sweep;
 231                 xp.vibrato_rate = wp->vibrato_rate;
 232                 xp.vibrato_depth = wp->vibrato_depth;
 233                 xp.scale_frequency = cpu_to_le16(wp->scale_frequency);
 234                 xp.scale_factor = cpu_to_le16(wp->scale_factor);
 235                 if (copy_to_user(*data, &xp, sizeof(xp)))
 236                         return -EFAULT;
 237                 *data += sizeof(xp);
 238                 *len -= sizeof(xp);
 239                 real_size = snd_seq_gf1_size(wp->size, wp->format);
 240                 if (*len < (long)real_size)
 241                         return -ENOMEM;
 242                 if (ops->get_sample) {
 243                         err = ops->get_sample(ops->private_data, wp,
 244                                               *data, real_size, atomic);
 245                         if (err < 0)
 246                                 return err;
 247                 }
 248                 *data += wp->size;
 249                 *len -= wp->size;
 250         }
 251         return 0;
 252 }
 253
 254 static int snd_seq_gf1_get(void *private_data, snd_seq_kinstr_t *instr,
 255                            char __user *instr_data, long len, int atomic,
 256                            int cmd)
 257 {
 258         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 259         gf1_instrument_t *ip;
 260         gf1_xinstrument_t ix;
 261
 262         if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
 263                 return -EINVAL;
 264         if (len < (long)sizeof(ix))
 265                 return -ENOMEM;
 266         memset(&ix, 0, sizeof(ix));
 267         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 268         ix.stype = GF1_STRU_INSTR;
 269         ix.exclusion = cpu_to_le16(ip->exclusion);
 270         ix.exclusion_group = cpu_to_le16(ip->exclusion_group);
 271         ix.effect1 = cpu_to_le16(ip->effect1);
 272         ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
 273         ix.effect2 = ip->effect2;
 274         ix.effect2_depth = ip->effect2_depth;
 275         if (copy_to_user(instr_data, &ix, sizeof(ix)))
 276                 return -EFAULT;
 277         instr_data += sizeof(ix);
 278         len -= sizeof(ix);
 279         return snd_seq_gf1_copy_wave_to_stream(ops,
 280                                                ip,
 281                                                &instr_data,
 282                                                &len,
 283                                                atomic);
 284 }
 285
 286 static int snd_seq_gf1_get_size(void *private_data, snd_seq_kinstr_t *instr,
 287                                 long *size)
 288 {
 289         long result;
 290         gf1_instrument_t *ip;
 291         gf1_wave_t *wp;
 292
 293         *size = 0;
 294         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 295         result = sizeof(gf1_xinstrument_t);
 296         for (wp = ip->wave; wp; wp = wp->next) {
 297                 result += sizeof(gf1_xwave_t);
 298                 result += wp->size;
 299         }
 300         *size = result;
 301         return 0;
 302 }
 303
 304 static int snd_seq_gf1_remove(void *private_data,
 305                               snd_seq_kinstr_t *instr,
 306                               int atomic)
 307 {
 308         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 309         gf1_instrument_t *ip;
 310
 311         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 312         snd_seq_gf1_instr_free(ops, ip, atomic);
 313         return 0;
 314 }
 315
 316 static void snd_seq_gf1_notify(void *private_data,
 317                                snd_seq_kinstr_t *instr,
 318                                int what)
 319 {
 320         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 321
 322         if (ops->notify)
 323                 ops->notify(ops->private_data, instr, what);
 324 }
 325
 326 int snd_seq_gf1_init(snd_gf1_ops_t *ops,
 327                      void *private_data,
 328                      snd_seq_kinstr_ops_t *next)
 329 {
 330         memset(ops, 0, sizeof(*ops));
 331         ops->private_data = private_data;
 332         ops->kops.private_data = ops;
 333         ops->kops.add_len = sizeof(gf1_instrument_t);
 334         ops->kops.instr_type = snd_seq_gf1_id;
 335         ops->kops.put = snd_seq_gf1_put;
 336         ops->kops.get = snd_seq_gf1_get;
 337         ops->kops.get_size = snd_seq_gf1_get_size;
 338         ops->kops.remove = snd_seq_gf1_remove;
 339         ops->kops.notify = snd_seq_gf1_notify;
 340         ops->kops.next = next;
 341         return 0;
 342 }
 343
 344 /*
 345  *  Init part
 346  */
 347
 348 static int __init alsa_ainstr_gf1_init(void)
 349 {
 350         return 0;
 351 }
 352
 353 static void __exit alsa_ainstr_gf1_exit(void)
 354 {
 355 }
 356
 357 module_init(alsa_ainstr_gf1_init)
 358 module_exit(alsa_ainstr_gf1_exit)
 359
 360 EXPORT_SYMBOL(snd_seq_gf1_id);
 361 EXPORT_SYMBOL(snd_seq_gf1_init);