216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/*
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* Simple (MOD player) - Instrument routines
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* Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
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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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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/ainstr_simple.h>
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#include <sound/initval.h>
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#include <asm/uaccess.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("Advanced Linux Sound Architecture Simple Instrument support.");
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MODULE_LICENSE("GPL");
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static unsigned int snd_seq_simple_size(unsigned int size, unsigned int format)
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{
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unsigned int result = size;
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if (format & SIMPLE_WAVE_16BIT)
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result <<= 1;
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if (format & SIMPLE_WAVE_STEREO)
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result <<= 1;
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return result;
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}
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static void snd_seq_simple_instr_free(snd_simple_ops_t *ops,
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simple_instrument_t *ip,
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int atomic)
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{
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if (ops->remove_sample)
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ops->remove_sample(ops->private_data, ip, atomic);
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}
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static int snd_seq_simple_put(void *private_data, snd_seq_kinstr_t *instr,
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char __user *instr_data, long len,
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int atomic, int cmd)
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{
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snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
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simple_instrument_t *ip;
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simple_xinstrument_t ix;
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int err, gfp_mask;
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unsigned int real_size;
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if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
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return -EINVAL;
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gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
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/* copy instrument data */
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if (len < (long)sizeof(ix))
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return -EINVAL;
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if (copy_from_user(&ix, instr_data, sizeof(ix)))
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return -EFAULT;
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if (ix.stype != SIMPLE_STRU_INSTR)
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return -EINVAL;
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instr_data += sizeof(ix);
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len -= sizeof(ix);
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ip = (simple_instrument_t *)KINSTR_DATA(instr);
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ip->share_id[0] = le32_to_cpu(ix.share_id[0]);
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ip->share_id[1] = le32_to_cpu(ix.share_id[1]);
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ip->share_id[2] = le32_to_cpu(ix.share_id[2]);
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ip->share_id[3] = le32_to_cpu(ix.share_id[3]);
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ip->format = le32_to_cpu(ix.format);
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ip->size = le32_to_cpu(ix.size);
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ip->start = le32_to_cpu(ix.start);
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ip->loop_start = le32_to_cpu(ix.loop_start);
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ip->loop_end = le32_to_cpu(ix.loop_end);
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ip->loop_repeat = le16_to_cpu(ix.loop_repeat);
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ip->effect1 = ix.effect1;
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ip->effect1_depth = ix.effect1_depth;
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ip->effect2 = ix.effect2;
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ip->effect2_depth = ix.effect2_depth;
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real_size = snd_seq_simple_size(ip->size, ip->format);
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if (len < (long)real_size)
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return -EINVAL;
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if (ops->put_sample) {
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err = ops->put_sample(ops->private_data, ip,
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instr_data, real_size, atomic);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int snd_seq_simple_get(void *private_data, snd_seq_kinstr_t *instr,
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char __user *instr_data, long len,
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int atomic, int cmd)
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{
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snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
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simple_instrument_t *ip;
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simple_xinstrument_t ix;
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int err;
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unsigned int real_size;
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if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
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return -EINVAL;
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if (len < (long)sizeof(ix))
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return -ENOMEM;
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memset(&ix, 0, sizeof(ix));
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ip = (simple_instrument_t *)KINSTR_DATA(instr);
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ix.stype = SIMPLE_STRU_INSTR;
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ix.share_id[0] = cpu_to_le32(ip->share_id[0]);
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ix.share_id[1] = cpu_to_le32(ip->share_id[1]);
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ix.share_id[2] = cpu_to_le32(ip->share_id[2]);
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ix.share_id[3] = cpu_to_le32(ip->share_id[3]);
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ix.format = cpu_to_le32(ip->format);
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ix.size = cpu_to_le32(ip->size);
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ix.start = cpu_to_le32(ip->start);
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ix.loop_start = cpu_to_le32(ip->loop_start);
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ix.loop_end = cpu_to_le32(ip->loop_end);
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ix.loop_repeat = cpu_to_le32(ip->loop_repeat);
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ix.effect1 = cpu_to_le16(ip->effect1);
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ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
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ix.effect2 = ip->effect2;
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ix.effect2_depth = ip->effect2_depth;
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if (copy_to_user(instr_data, &ix, sizeof(ix)))
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return -EFAULT;
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instr_data += sizeof(ix);
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len -= sizeof(ix);
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real_size = snd_seq_simple_size(ip->size, ip->format);
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if (len < (long)real_size)
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return -ENOMEM;
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if (ops->get_sample) {
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err = ops->get_sample(ops->private_data, ip,
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instr_data, real_size, atomic);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int snd_seq_simple_get_size(void *private_data, snd_seq_kinstr_t *instr,
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long *size)
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{
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simple_instrument_t *ip;
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ip = (simple_instrument_t *)KINSTR_DATA(instr);
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*size = sizeof(simple_xinstrument_t) + snd_seq_simple_size(ip->size, ip->format);
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return 0;
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}
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static int snd_seq_simple_remove(void *private_data,
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snd_seq_kinstr_t *instr,
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int atomic)
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{
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snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
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simple_instrument_t *ip;
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ip = (simple_instrument_t *)KINSTR_DATA(instr);
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snd_seq_simple_instr_free(ops, ip, atomic);
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return 0;
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}
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static void snd_seq_simple_notify(void *private_data,
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snd_seq_kinstr_t *instr,
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int what)
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{
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snd_simple_ops_t *ops = (snd_simple_ops_t *)private_data;
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if (ops->notify)
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ops->notify(ops->private_data, instr, what);
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}
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int snd_seq_simple_init(snd_simple_ops_t *ops,
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void *private_data,
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snd_seq_kinstr_ops_t *next)
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{
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memset(ops, 0, sizeof(*ops));
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ops->private_data = private_data;
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ops->kops.private_data = ops;
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ops->kops.add_len = sizeof(simple_instrument_t);
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ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_SIMPLE;
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ops->kops.put = snd_seq_simple_put;
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ops->kops.get = snd_seq_simple_get;
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ops->kops.get_size = snd_seq_simple_get_size;
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ops->kops.remove = snd_seq_simple_remove;
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ops->kops.notify = snd_seq_simple_notify;
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ops->kops.next = next;
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return 0;
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}
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/*
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* Init part
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*/
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static int __init alsa_ainstr_simple_init(void)
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{
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return 0;
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}
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static void __exit alsa_ainstr_simple_exit(void)
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{
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}
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module_init(alsa_ainstr_simple_init)
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module_exit(alsa_ainstr_simple_exit)
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EXPORT_SYMBOL(snd_seq_simple_init);
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