229 lines
6.1 KiB
C
229 lines
6.1 KiB
C
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/*
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* Patch transfer callback for Emu10k1
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*
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* Copyright (C) 2000 Takashi iwai <tiwai@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* All the code for loading in a patch. There is very little that is
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* chip specific here. Just the actual writing to the board.
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*/
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#include "emu10k1_synth_local.h"
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/*
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*/
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#define BLANK_LOOP_START 4
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#define BLANK_LOOP_END 8
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#define BLANK_LOOP_SIZE 12
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#define BLANK_HEAD_SIZE 32
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/*
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* allocate a sample block and copy data from userspace
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*/
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int
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snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
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struct snd_util_memhdr *hdr,
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const void __user *data, long count)
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{
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int offset;
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int truesize, size, loopsize, blocksize;
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int loopend, sampleend;
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unsigned int start_addr;
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struct snd_emu10k1 *emu;
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emu = rec->hw;
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if (snd_BUG_ON(!sp || !hdr))
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return -EINVAL;
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if (sp->v.size == 0) {
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dev_dbg(emu->card->dev,
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"emu: rom font for sample %d\n", sp->v.sample);
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return 0;
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}
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/* recalculate address offset */
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sp->v.end -= sp->v.start;
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sp->v.loopstart -= sp->v.start;
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sp->v.loopend -= sp->v.start;
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sp->v.start = 0;
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/* some samples have invalid data. the addresses are corrected in voice info */
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sampleend = sp->v.end;
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if (sampleend > sp->v.size)
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sampleend = sp->v.size;
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loopend = sp->v.loopend;
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if (loopend > sampleend)
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loopend = sampleend;
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/* be sure loop points start < end */
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if (sp->v.loopstart >= sp->v.loopend)
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swap(sp->v.loopstart, sp->v.loopend);
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/* compute true data size to be loaded */
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truesize = sp->v.size + BLANK_HEAD_SIZE;
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loopsize = 0;
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#if 0 /* not supported */
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if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
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loopsize = sp->v.loopend - sp->v.loopstart;
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truesize += loopsize;
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#endif
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if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
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truesize += BLANK_LOOP_SIZE;
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/* try to allocate a memory block */
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blocksize = truesize;
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
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blocksize *= 2;
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sp->block = snd_emu10k1_synth_alloc(emu, blocksize);
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if (sp->block == NULL) {
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dev_dbg(emu->card->dev,
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"synth malloc failed (size=%d)\n", blocksize);
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/* not ENOMEM (for compatibility with OSS) */
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return -ENOSPC;
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}
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/* set the total size */
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sp->v.truesize = blocksize;
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/* write blank samples at head */
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offset = 0;
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size = BLANK_HEAD_SIZE;
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
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size *= 2;
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if (offset + size > blocksize)
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return -EINVAL;
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snd_emu10k1_synth_bzero(emu, sp->block, offset, size);
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offset += size;
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/* copy start->loopend */
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size = loopend;
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
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size *= 2;
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if (offset + size > blocksize)
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return -EINVAL;
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if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
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snd_emu10k1_synth_free(emu, sp->block);
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sp->block = NULL;
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return -EFAULT;
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}
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offset += size;
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data += size;
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#if 0 /* not supported yet */
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/* handle reverse (or bidirectional) loop */
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if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) {
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/* copy loop in reverse */
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
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int woffset;
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unsigned short *wblock = (unsigned short*)block;
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woffset = offset / 2;
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if (offset + loopsize * 2 > blocksize)
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return -EINVAL;
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for (i = 0; i < loopsize; i++)
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wblock[woffset + i] = wblock[woffset - i -1];
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offset += loopsize * 2;
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} else {
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if (offset + loopsize > blocksize)
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return -EINVAL;
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for (i = 0; i < loopsize; i++)
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block[offset + i] = block[offset - i -1];
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offset += loopsize;
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}
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/* modify loop pointers */
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if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
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sp->v.loopend += loopsize;
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} else {
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sp->v.loopstart += loopsize;
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sp->v.loopend += loopsize;
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}
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/* add sample pointer */
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sp->v.end += loopsize;
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}
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#endif
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/* loopend -> sample end */
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size = sp->v.size - loopend;
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if (size < 0)
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return -EINVAL;
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
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size *= 2;
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if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
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snd_emu10k1_synth_free(emu, sp->block);
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sp->block = NULL;
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return -EFAULT;
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}
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offset += size;
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/* clear rest of samples (if any) */
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if (offset < blocksize)
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snd_emu10k1_synth_bzero(emu, sp->block, offset, blocksize - offset);
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if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
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/* if no blank loop is attached in the sample, add it */
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if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
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sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
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sp->v.loopend = sp->v.end + BLANK_LOOP_END;
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}
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}
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#if 0 /* not supported yet */
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if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) {
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/* unsigned -> signed */
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
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unsigned short *wblock = (unsigned short*)block;
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for (i = 0; i < truesize; i++)
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wblock[i] ^= 0x8000;
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} else {
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for (i = 0; i < truesize; i++)
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block[i] ^= 0x80;
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}
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}
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#endif
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/* recalculate offset */
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start_addr = BLANK_HEAD_SIZE * 2;
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if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
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start_addr >>= 1;
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sp->v.start += start_addr;
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sp->v.end += start_addr;
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sp->v.loopstart += start_addr;
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sp->v.loopend += start_addr;
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return 0;
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}
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/*
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* free a sample block
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*/
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int
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snd_emu10k1_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
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struct snd_util_memhdr *hdr)
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{
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struct snd_emu10k1 *emu;
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emu = rec->hw;
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if (snd_BUG_ON(!sp || !hdr))
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return -EINVAL;
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if (sp->block) {
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snd_emu10k1_synth_free(emu, sp->block);
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sp->block = NULL;
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}
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return 0;
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}
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