sound/pci/emu10k1/emu10k1_patch.c

   1 /*
   2  *  Patch transfer callback for Emu10k1
   3  *
   4  *  Copyright (C) 2000 Takashi iwai <tiwai@suse.de>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20 /*
  21  * All the code for loading in a patch.  There is very little that is
  22  * chip specific here.  Just the actual writing to the board.
  23  */
  24
  25 #include "emu10k1_synth_local.h"
  26
  27 /*
  28  */
  29 #define BLANK_LOOP_START        4
  30 #define BLANK_LOOP_END          8
  31 #define BLANK_LOOP_SIZE         12
  32 #define BLANK_HEAD_SIZE         32
  33
  34 /*
  35  * allocate a sample block and copy data from userspace
  36  */
  37 int
  38 snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
  39                        struct snd_util_memhdr *hdr,
  40                        const void __user *data, long count)
  41 {
  42         int offset;
  43         int truesize, size, loopsize, blocksize;
  44         int loopend, sampleend;
  45         unsigned int start_addr;
  46         struct snd_emu10k1 *emu;
  47
  48         emu = rec->hw;
  49         if (snd_BUG_ON(!sp || !hdr))
  50                 return -EINVAL;
  51
  52         if (sp->v.size == 0) {
  53                 snd_printd("emu: rom font for sample %d\n", sp->v.sample);
  54                 return 0;
  55         }
  56
  57         /* recalculate address offset */
  58         sp->v.end -= sp->v.start;
  59         sp->v.loopstart -= sp->v.start;
  60         sp->v.loopend -= sp->v.start;
  61         sp->v.start = 0;
  62
  63         /* some samples have invalid data.  the addresses are corrected in voice info */
  64         sampleend = sp->v.end;
  65         if (sampleend > sp->v.size)
  66                 sampleend = sp->v.size;
  67         loopend = sp->v.loopend;
  68         if (loopend > sampleend)
  69                 loopend = sampleend;
  70
  71         /* be sure loop points start < end */
  72         if (sp->v.loopstart >= sp->v.loopend) {
  73                 int tmp = sp->v.loopstart;
  74                 sp->v.loopstart = sp->v.loopend;
  75                 sp->v.loopend = tmp;
  76         }
  77
  78         /* compute true data size to be loaded */
  79         truesize = sp->v.size + BLANK_HEAD_SIZE;
  80         loopsize = 0;
  81 #if 0 /* not supported */
  82         if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
  83                 loopsize = sp->v.loopend - sp->v.loopstart;
  84         truesize += loopsize;
  85 #endif
  86         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
  87                 truesize += BLANK_LOOP_SIZE;
  88
  89         /* try to allocate a memory block */
  90         blocksize = truesize;
  91         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
  92                 blocksize *= 2;
  93         sp->block = snd_emu10k1_synth_alloc(emu, blocksize);
  94         if (sp->block == NULL) {
  95                 snd_printd("emu10k1: synth malloc failed (size=%d)\n", blocksize);
  96                 /* not ENOMEM (for compatibility with OSS) */
  97                 return -ENOSPC;
  98         }
  99         /* set the total size */
 100         sp->v.truesize = blocksize;
 101
 102         /* write blank samples at head */
 103         offset = 0;
 104         size = BLANK_HEAD_SIZE;
 105         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 106                 size *= 2;
 107         if (offset + size > blocksize)
 108                 return -EINVAL;
 109         snd_emu10k1_synth_bzero(emu, sp->block, offset, size);
 110         offset += size;
 111
 112         /* copy start->loopend */
 113         size = loopend;
 114         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 115                 size *= 2;
 116         if (offset + size > blocksize)
 117                 return -EINVAL;
 118         if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
 119                 snd_emu10k1_synth_free(emu, sp->block);
 120                 sp->block = NULL;
 121                 return -EFAULT;
 122         }
 123         offset += size;
 124         data += size;
 125
 126 #if 0 /* not suppported yet */
 127         /* handle reverse (or bidirectional) loop */
 128         if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) {
 129                 /* copy loop in reverse */
 130                 if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
 131                         int woffset;
 132                         unsigned short *wblock = (unsigned short*)block;
 133                         woffset = offset / 2;
 134                         if (offset + loopsize * 2 > blocksize)
 135                                 return -EINVAL;
 136                         for (i = 0; i < loopsize; i++)
 137                                 wblock[woffset + i] = wblock[woffset - i -1];
 138                         offset += loopsize * 2;
 139                 } else {
 140                         if (offset + loopsize > blocksize)
 141                                 return -EINVAL;
 142                         for (i = 0; i < loopsize; i++)
 143                                 block[offset + i] = block[offset - i -1];
 144                         offset += loopsize;
 145                 }
 146
 147                 /* modify loop pointers */
 148                 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
 149                         sp->v.loopend += loopsize;
 150                 } else {
 151                         sp->v.loopstart += loopsize;
 152                         sp->v.loopend += loopsize;
 153                 }
 154                 /* add sample pointer */
 155                 sp->v.end += loopsize;
 156         }
 157 #endif
 158
 159         /* loopend -> sample end */
 160         size = sp->v.size - loopend;
 161         if (size < 0)
 162                 return -EINVAL;
 163         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 164                 size *= 2;
 165         if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
 166                 snd_emu10k1_synth_free(emu, sp->block);
 167                 sp->block = NULL;
 168                 return -EFAULT;
 169         }
 170         offset += size;
 171
 172         /* clear rest of samples (if any) */
 173         if (offset < blocksize)
 174                 snd_emu10k1_synth_bzero(emu, sp->block, offset, blocksize - offset);
 175
 176         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
 177                 /* if no blank loop is attached in the sample, add it */
 178                 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
 179                         sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
 180                         sp->v.loopend = sp->v.end + BLANK_LOOP_END;
 181                 }
 182         }
 183
 184 #if 0 /* not supported yet */
 185         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) {
 186                 /* unsigned -> signed */
 187                 if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
 188                         unsigned short *wblock = (unsigned short*)block;
 189                         for (i = 0; i < truesize; i++)
 190                                 wblock[i] ^= 0x8000;
 191                 } else {
 192                         for (i = 0; i < truesize; i++)
 193                                 block[i] ^= 0x80;
 194                 }
 195         }
 196 #endif
 197
 198         /* recalculate offset */
 199         start_addr = BLANK_HEAD_SIZE * 2;
 200         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 201                 start_addr >>= 1;
 202         sp->v.start += start_addr;
 203         sp->v.end += start_addr;
 204         sp->v.loopstart += start_addr;
 205         sp->v.loopend += start_addr;
 206
 207         return 0;
 208 }
 209
 210 /*
 211  * free a sample block
 212  */
 213 int
 214 snd_emu10k1_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
 215                         struct snd_util_memhdr *hdr)
 216 {
 217         struct snd_emu10k1 *emu;
 218
 219         emu = rec->hw;
 220         if (snd_BUG_ON(!sp || !hdr))
 221                 return -EINVAL;
 222
 223         if (sp->block) {
 224                 snd_emu10k1_synth_free(emu, sp->block);
 225                 sp->block = NULL;
 226         }
 227         return 0;
 228 }
 229