sound/core/seq/instr/ainstr_gf1.c

   1 /*
   2  *   GF1 (GUS) Patch - Instrument routines
   3  *   Copyright (c) 1999 by Jaroslav Kysela <perex@perex.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/slab.h>
  24 #include <sound/core.h>
  25 #include <sound/ainstr_gf1.h>
  26 #include <sound/initval.h>
  27 #include <asm/uaccess.h>
  28
  29 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  30 MODULE_DESCRIPTION("Advanced Linux Sound Architecture GF1 (GUS) Patch support.");
  31 MODULE_LICENSE("GPL");
  32
  33 static unsigned int snd_seq_gf1_size(unsigned int size, unsigned int format)
  34 {
  35         unsigned int result = size;
  36
  37         if (format & GF1_WAVE_16BIT)
  38                 result <<= 1;
  39         if (format & GF1_WAVE_STEREO)
  40                 result <<= 1;
  41         return format;
  42 }
  43
  44 static int snd_seq_gf1_copy_wave_from_stream(struct snd_gf1_ops *ops,
  45                                              struct gf1_instrument *ip,
  46                                              char __user **data,
  47                                              long *len,
  48                                              int atomic)
  49 {
  50         struct gf1_wave *wp, *prev;
  51         struct gf1_xwave xp;
  52         int err;
  53         gfp_t 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 = kzalloc(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(struct snd_gf1_ops *ops,
 119                                   struct gf1_wave *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(struct snd_gf1_ops *ops,
 128                                    struct gf1_instrument *ip,
 129                                    int atomic)
 130 {
 131         struct gf1_wave *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, struct snd_seq_kinstr *instr,
 140                            char __user *instr_data, long len, int atomic,
 141                            int cmd)
 142 {
 143         struct snd_gf1_ops *ops = private_data;
 144         struct gf1_instrument *ip;
 145         struct gf1_xinstrument ix;
 146         int err;
 147         gfp_t gfp_mask;
 148
 149         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
 150                 return -EINVAL;
 151         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
 152         /* copy instrument data */
 153         if (len < (long)sizeof(ix))
 154                 return -EINVAL;
 155         if (copy_from_user(&ix, instr_data, sizeof(ix)))
 156                 return -EFAULT;
 157         if (ix.stype != GF1_STRU_INSTR)
 158                 return -EINVAL;
 159         instr_data += sizeof(ix);
 160         len -= sizeof(ix);
 161         ip = (struct gf1_instrument *)KINSTR_DATA(instr);
 162         ip->exclusion = le16_to_cpu(ix.exclusion);
 163         ip->exclusion_group = le16_to_cpu(ix.exclusion_group);
 164         ip->effect1 = ix.effect1;
 165         ip->effect1_depth = ix.effect1_depth;
 166         ip->effect2 = ix.effect2;
 167         ip->effect2_depth = ix.effect2_depth;
 168         /* copy layers */
 169         while (len > (long)sizeof(__u32)) {
 170                 __u32 stype;
 171
 172                 if (copy_from_user(&stype, instr_data, sizeof(stype)))
 173                         return -EFAULT;
 174                 if (stype != GF1_STRU_WAVE) {
 175                         snd_seq_gf1_instr_free(ops, ip, atomic);
 176                         return -EINVAL;
 177                 }
 178                 err = snd_seq_gf1_copy_wave_from_stream(ops,
 179                                                         ip,
 180                                                         &instr_data,
 181                                                         &len,
 182                                                         atomic);
 183                 if (err < 0) {
 184                         snd_seq_gf1_instr_free(ops, ip, atomic);
 185                         return err;
 186                 }
 187         }
 188         return 0;
 189 }
 190
 191 static int snd_seq_gf1_copy_wave_to_stream(struct snd_gf1_ops *ops,
 192                                            struct gf1_instrument *ip,
 193                                            char __user **data,
 194                                            long *len,
 195                                            int atomic)
 196 {
 197         struct gf1_wave *wp;
 198         struct gf1_xwave xp;
 199         int err;
 200         unsigned int real_size;
 201
 202         for (wp = ip->wave; wp; wp = wp->next) {
 203                 if (*len < (long)sizeof(xp))
 204                         return -ENOMEM;
 205                 memset(&xp, 0, sizeof(xp));
 206                 xp.stype = GF1_STRU_WAVE;
 207                 xp.share_id[0] = cpu_to_le32(wp->share_id[0]);
 208                 xp.share_id[1] = cpu_to_le32(wp->share_id[1]);
 209                 xp.share_id[2] = cpu_to_le32(wp->share_id[2]);
 210                 xp.share_id[3] = cpu_to_le32(wp->share_id[3]);
 211                 xp.format = cpu_to_le32(wp->format);
 212                 xp.size = cpu_to_le32(wp->size);
 213                 xp.start = cpu_to_le32(wp->start);
 214                 xp.loop_start = cpu_to_le32(wp->loop_start);
 215                 xp.loop_end = cpu_to_le32(wp->loop_end);
 216                 xp.loop_repeat = cpu_to_le32(wp->loop_repeat);
 217                 xp.flags = wp->flags;
 218                 xp.sample_rate = cpu_to_le32(wp->sample_rate);
 219                 xp.low_frequency = cpu_to_le32(wp->low_frequency);
 220                 xp.high_frequency = cpu_to_le32(wp->high_frequency);
 221                 xp.root_frequency = cpu_to_le32(wp->root_frequency);
 222                 xp.tune = cpu_to_le16(wp->tune);
 223                 xp.balance = wp->balance;
 224                 memcpy(xp.envelope_rate, wp->envelope_rate, 6);
 225                 memcpy(xp.envelope_offset, wp->envelope_offset, 6);
 226                 xp.tremolo_sweep = wp->tremolo_sweep;
 227                 xp.tremolo_rate = wp->tremolo_rate;
 228                 xp.tremolo_depth = wp->tremolo_depth;
 229                 xp.vibrato_sweep = wp->vibrato_sweep;
 230                 xp.vibrato_rate = wp->vibrato_rate;
 231                 xp.vibrato_depth = wp->vibrato_depth;
 232                 xp.scale_frequency = cpu_to_le16(wp->scale_frequency);
 233                 xp.scale_factor = cpu_to_le16(wp->scale_factor);
 234                 if (copy_to_user(*data, &xp, sizeof(xp)))
 235                         return -EFAULT;
 236                 *data += sizeof(xp);
 237                 *len -= sizeof(xp);
 238                 real_size = snd_seq_gf1_size(wp->size, wp->format);
 239                 if (*len < (long)real_size)
 240                         return -ENOMEM;
 241                 if (ops->get_sample) {
 242                         err = ops->get_sample(ops->private_data, wp,
 243                                               *data, real_size, atomic);
 244                         if (err < 0)
 245                                 return err;
 246                 }
 247                 *data += wp->size;
 248                 *len -= wp->size;
 249         }
 250         return 0;
 251 }
 252
 253 static int snd_seq_gf1_get(void *private_data, struct snd_seq_kinstr *instr,
 254                            char __user *instr_data, long len, int atomic,
 255                            int cmd)
 256 {
 257         struct snd_gf1_ops *ops = private_data;
 258         struct gf1_instrument *ip;
 259         struct gf1_xinstrument ix;
 260
 261         if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
 262                 return -EINVAL;
 263         if (len < (long)sizeof(ix))
 264                 return -ENOMEM;
 265         memset(&ix, 0, sizeof(ix));
 266         ip = (struct gf1_instrument *)KINSTR_DATA(instr);
 267         ix.stype = GF1_STRU_INSTR;
 268         ix.exclusion = cpu_to_le16(ip->exclusion);
 269         ix.exclusion_group = cpu_to_le16(ip->exclusion_group);
 270         ix.effect1 = cpu_to_le16(ip->effect1);
 271         ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
 272         ix.effect2 = ip->effect2;
 273         ix.effect2_depth = ip->effect2_depth;
 274         if (copy_to_user(instr_data, &ix, sizeof(ix)))
 275                 return -EFAULT;
 276         instr_data += sizeof(ix);
 277         len -= sizeof(ix);
 278         return snd_seq_gf1_copy_wave_to_stream(ops,
 279                                                ip,
 280                                                &instr_data,
 281                                                &len,
 282                                                atomic);
 283 }
 284
 285 static int snd_seq_gf1_get_size(void *private_data, struct snd_seq_kinstr *instr,
 286                                 long *size)
 287 {
 288         long result;
 289         struct gf1_instrument *ip;
 290         struct gf1_wave *wp;
 291
 292         *size = 0;
 293         ip = (struct gf1_instrument *)KINSTR_DATA(instr);
 294         result = sizeof(struct gf1_xinstrument);
 295         for (wp = ip->wave; wp; wp = wp->next) {
 296                 result += sizeof(struct gf1_xwave);
 297                 result += wp->size;
 298         }
 299         *size = result;
 300         return 0;
 301 }
 302
 303 static int snd_seq_gf1_remove(void *private_data,
 304                               struct snd_seq_kinstr *instr,
 305                               int atomic)
 306 {
 307         struct snd_gf1_ops *ops = private_data;
 308         struct gf1_instrument *ip;
 309
 310         ip = (struct gf1_instrument *)KINSTR_DATA(instr);
 311         snd_seq_gf1_instr_free(ops, ip, atomic);
 312         return 0;
 313 }
 314
 315 static void snd_seq_gf1_notify(void *private_data,
 316                                struct snd_seq_kinstr *instr,
 317                                int what)
 318 {
 319         struct snd_gf1_ops *ops = private_data;
 320
 321         if (ops->notify)
 322                 ops->notify(ops->private_data, instr, what);
 323 }
 324
 325 int snd_seq_gf1_init(struct snd_gf1_ops *ops,
 326                      void *private_data,
 327                      struct snd_seq_kinstr_ops *next)
 328 {
 329         memset(ops, 0, sizeof(*ops));
 330         ops->private_data = private_data;
 331         ops->kops.private_data = ops;
 332         ops->kops.add_len = sizeof(struct gf1_instrument);
 333         ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_GUS_PATCH;
 334         ops->kops.put = snd_seq_gf1_put;
 335         ops->kops.get = snd_seq_gf1_get;
 336         ops->kops.get_size = snd_seq_gf1_get_size;
 337         ops->kops.remove = snd_seq_gf1_remove;
 338         ops->kops.notify = snd_seq_gf1_notify;
 339         ops->kops.next = next;
 340         return 0;
 341 }
 342
 343 /*
 344  *  Init part
 345  */
 346
 347 static int __init alsa_ainstr_gf1_init(void)
 348 {
 349         return 0;
 350 }
 351
 352 static void __exit alsa_ainstr_gf1_exit(void)
 353 {
 354 }
 355
 356 module_init(alsa_ainstr_gf1_init)
 357 module_exit(alsa_ainstr_gf1_exit)
 358
 359 EXPORT_SYMBOL(snd_seq_gf1_init);