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 MODULE_CLASSES("{sound}");
  34 MODULE_SUPPORTED_DEVICE("sound");
  35
  36 char *snd_seq_gf1_id = SNDRV_SEQ_INSTR_ID_GUS_PATCH;
  37
  38 static unsigned int snd_seq_gf1_size(unsigned int size, unsigned int format)
  39 {
  40         unsigned int result = size;
  41
  42         if (format & GF1_WAVE_16BIT)
  43                 result <<= 1;
  44         if (format & GF1_WAVE_STEREO)
  45                 result <<= 1;
  46         return format;
  47 }
  48
  49 static int snd_seq_gf1_copy_wave_from_stream(snd_gf1_ops_t *ops,
  50                                              gf1_instrument_t *ip,
  51                                              char **data,
  52                                              long *len,
  53                                              int atomic)
  54 {
  55         gf1_wave_t *wp, *prev;
  56         gf1_xwave_t xp;
  57         int err, gfp_mask;
  58         unsigned int real_size;
  59
  60         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
  61         if (*len < (long)sizeof(xp))
  62                 return -EINVAL;
  63         if (copy_from_user(&xp, *data, sizeof(xp)))
  64                 return -EFAULT;
  65         *data += sizeof(xp);
  66         *len -= sizeof(xp);
  67         wp = (gf1_wave_t *)snd_kcalloc(sizeof(*wp), gfp_mask);
  68         if (wp == NULL)
  69                 return -ENOMEM;
  70         wp->share_id[0] = le32_to_cpu(xp.share_id[0]);
  71         wp->share_id[1] = le32_to_cpu(xp.share_id[1]);
  72         wp->share_id[2] = le32_to_cpu(xp.share_id[2]);
  73         wp->share_id[3] = le32_to_cpu(xp.share_id[3]);
  74         wp->format = le32_to_cpu(xp.format);
  75         wp->size = le32_to_cpu(xp.size);
  76         wp->start = le32_to_cpu(xp.start);
  77         wp->loop_start = le32_to_cpu(xp.loop_start);
  78         wp->loop_end = le32_to_cpu(xp.loop_end);
  79         wp->loop_repeat = le16_to_cpu(xp.loop_repeat);
  80         wp->flags = xp.flags;
  81         wp->sample_rate = le32_to_cpu(xp.sample_rate);
  82         wp->low_frequency = le32_to_cpu(xp.low_frequency);
  83         wp->high_frequency = le32_to_cpu(xp.high_frequency);
  84         wp->root_frequency = le32_to_cpu(xp.root_frequency);
  85         wp->tune = le16_to_cpu(xp.tune);
  86         wp->balance = xp.balance;
  87         memcpy(wp->envelope_rate, xp.envelope_rate, 6);
  88         memcpy(wp->envelope_offset, xp.envelope_offset, 6);
  89         wp->tremolo_sweep = xp.tremolo_sweep;
  90         wp->tremolo_rate = xp.tremolo_rate;
  91         wp->tremolo_depth = xp.tremolo_depth;
  92         wp->vibrato_sweep = xp.vibrato_sweep;
  93         wp->vibrato_rate = xp.vibrato_rate;
  94         wp->vibrato_depth = xp.vibrato_depth;
  95         wp->scale_frequency = le16_to_cpu(xp.scale_frequency);
  96         wp->scale_factor = le16_to_cpu(xp.scale_factor);
  97         real_size = snd_seq_gf1_size(wp->size, wp->format);
  98         if ((long)real_size > *len) {
  99                 kfree(wp);
 100                 return -ENOMEM;
 101         }
 102         if (ops->put_sample) {
 103                 err = ops->put_sample(ops->private_data, wp,
 104                                       *data, real_size, atomic);
 105                 if (err < 0) {
 106                         kfree(wp);
 107                         return err;
 108                 }
 109         }
 110         *data += real_size;
 111         *len -= real_size;
 112         prev = ip->wave;
 113         if (prev) {
 114                 while (prev->next) prev = prev->next;
 115                 prev->next = wp;
 116         } else {
 117                 ip->wave = wp;
 118         }
 119         return 0;
 120 }
 121
 122 static void snd_seq_gf1_wave_free(snd_gf1_ops_t *ops,
 123                                   gf1_wave_t *wave,
 124                                   int atomic)
 125 {
 126         if (ops->remove_sample)
 127                 ops->remove_sample(ops->private_data, wave, atomic);
 128         kfree(wave);
 129 }
 130
 131 static void snd_seq_gf1_instr_free(snd_gf1_ops_t *ops,
 132                                    gf1_instrument_t *ip,
 133                                    int atomic)
 134 {
 135         gf1_wave_t *wave;
 136
 137         while ((wave = ip->wave) != NULL) {
 138                 ip->wave = wave->next;
 139                 snd_seq_gf1_wave_free(ops, wave, atomic);
 140         }
 141 }
 142
 143 static int snd_seq_gf1_put(void *private_data, snd_seq_kinstr_t *instr,
 144                            char *instr_data, long len, int atomic, int cmd)
 145 {
 146         snd_gf1_ops_t *ops = (snd_gf1_ops_t *)private_data;
 147         gf1_instrument_t *ip;
 148         gf1_xinstrument_t ix;
 149         int err, gfp_mask;
 150
 151         if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
 152                 return -EINVAL;
 153         gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
 154         /* copy instrument data */
 155         if (len < (long)sizeof(ix))
 156                 return -EINVAL;
 157         if (copy_from_user(&ix, instr_data, sizeof(ix)))
 158                 return -EFAULT;
 159         if (ix.stype != GF1_STRU_INSTR)
 160                 return -EINVAL;
 161         instr_data += sizeof(ix);
 162         len -= sizeof(ix);
 163         ip = (gf1_instrument_t *)KINSTR_DATA(instr);
 164         ip->exclusion = le16_to_cpu(ix.exclusion);
 165         ip->exclusion_group = le16_to_cpu(ix.exclusion_group);
 166         ip->effect1 = ix.effect1;
 167         ip->effect1_depth = ix.effect1_depth;
 168         ip->effect2 = ix.effect2;
 169         ip->effect2_depth = ix.effect2_depth;
 170         /* copy layers */
 171         while (len > (long)sizeof(__u32)) {
 172                 __u32 stype;
 173
 174                 if (copy_from_user(&stype, instr_data, sizeof(stype)))
 175                         return -EFAULT;
 176                 if (stype != GF1_STRU_WAVE) {
 177                         snd_seq_gf1_instr_free(ops, ip, atomic);
 178                         return -EINVAL;
 179                 }
 180                 err = snd_seq_gf1_copy_wave_from_stream(ops,
 181                                                         ip,
 182                                                         &instr_data,
 183                                                         &len,
 184                                                         atomic);
 185                 if (err < 0) {
 186                         snd_seq_gf1_instr_free(ops, ip, atomic);
 187                         return err;
 188                 }
 189         }
 190         return 0;
 191 }
 192
 193 static int snd_seq_gf1_copy_wave_to_stream(snd_gf1_ops_t *ops,
 194                                            gf1_instrument_t *ip,
 195                                            char **data,
 196                                            long *len,
 197                                            int atomic)
 198 {
 199         gf1_wave_t *wp;
 200         gf1_xwave_t xp;
 201         int err;
 202         unsigned int real_size;
 203
 204         for (wp = ip->wave; wp; wp = wp->next) {
 205                 if (*len < (long)sizeof(xp))
 206                         return -ENOMEM;
 207                 memset(&xp, 0, sizeof(xp));
 208                 xp.stype = GF1_STRU_WAVE;
 209                 xp.share_id[0] = cpu_to_le32(wp->share_id[0]);
 210                 xp.share_id[1] = cpu_to_le32(wp->share_id[1]);
 211                 xp.share_id[2] = cpu_to_le32(wp->share_id[2]);
 212                 xp.share_id[3] = cpu_to_le32(wp->share_id[3]);
 213                 xp.format = cpu_to_le32(wp->format);
 214                 xp.size = cpu_to_le32(wp->size);
 215                 xp.start = cpu_to_le32(wp->start);
 216                 xp.loop_start = cpu_to_le32(wp->loop_start);
 217                 xp.loop_end = cpu_to_le32(wp->loop_end);
 218                 xp.loop_repeat = cpu_to_le32(wp->loop_repeat);
 219                 xp.flags = wp->flags;
 220                 xp.sample_rate = cpu_to_le32(wp->sample_rate);
 221                 xp.low_frequency = cpu_to_le32(wp->low_frequency);
 222                 xp.high_frequency = cpu_to_le32(wp->high_frequency);
 223                 xp.root_frequency = cpu_to_le32(wp->root_frequency);
 224                 xp.tune = cpu_to_le16(wp->tune);
 225                 xp.balance = wp->balance;
 226                 memcpy(xp.envelope_rate, wp->envelope_rate, 6);
 227                 memcpy(xp.envelope_offset, wp->envelope_offset, 6);
 228                 xp.tremolo_sweep = wp->tremolo_sweep;
 229                 xp.tremolo_rate = wp->tremolo_rate;
 230                 xp.tremolo_depth = wp->tremolo_depth;
 231                 xp.vibrato_sweep = wp->vibrato_sweep;
 232                 xp.vibrato_rate = wp->vibrato_rate;
 233                 xp.vibrato_depth = wp->vibrato_depth;
 234                 xp.scale_frequency = cpu_to_le16(wp->scale_frequency);
 235                 xp.scale_factor = cpu_to_le16(wp->scale_factor);
 236                 if (copy_to_user(*data, &xp, sizeof(xp)))
 237                         return -EFAULT;
 238                 *data += sizeof(xp);
 239                 *len -= sizeof(xp);
 240                 real_size = snd_seq_gf1_size(wp->size, wp->format);
 241                 if (*len < (long)real_size)
 242                         return -ENOMEM;
 243                 if (ops->get_sample) {
 244                         err = ops->get_sample(ops->private_data, wp,
 245                                               *data, real_size, atomic);
 246                         if (err < 0)
 247                                 return err;
 248                 }
 249                 *data += wp->size;
 250                 *len -= wp->size;
 251         }
 252         return 0;
 253 }
 254
 255 static int snd_seq_gf1_get(void *private_data, snd_seq_kinstr_t *instr,
 256                            char *instr_data, long len, int atomic, 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);