Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
223
sound/drivers/opl4/opl4_seq.c
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223
sound/drivers/opl4/opl4_seq.c
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/*
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* OPL4 sequencer functions
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*
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* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed and/or modified under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opl4_local.h"
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
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MODULE_DESCRIPTION("OPL4 wavetable synth driver");
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MODULE_LICENSE("Dual BSD/GPL");
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int volume_boost = 8;
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module_param(volume_boost, int, 0644);
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MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");
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static int snd_opl4_seq_use_inc(opl4_t *opl4)
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{
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if (!try_module_get(opl4->card->module))
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return -EFAULT;
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return 0;
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}
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static void snd_opl4_seq_use_dec(opl4_t *opl4)
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{
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module_put(opl4->card->module);
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}
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static int snd_opl4_seq_use(void *private_data, snd_seq_port_subscribe_t *info)
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{
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opl4_t *opl4 = private_data;
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int err;
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down(&opl4->access_mutex);
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if (opl4->used) {
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up(&opl4->access_mutex);
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return -EBUSY;
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}
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opl4->used++;
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if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
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err = snd_opl4_seq_use_inc(opl4);
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if (err < 0) {
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up(&opl4->access_mutex);
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return err;
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}
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}
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up(&opl4->access_mutex);
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snd_opl4_synth_reset(opl4);
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return 0;
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}
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static int snd_opl4_seq_unuse(void *private_data, snd_seq_port_subscribe_t *info)
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{
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opl4_t *opl4 = private_data;
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snd_opl4_synth_shutdown(opl4);
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down(&opl4->access_mutex);
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opl4->used--;
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up(&opl4->access_mutex);
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if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
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snd_opl4_seq_use_dec(opl4);
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return 0;
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}
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static snd_midi_op_t opl4_ops = {
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.note_on = snd_opl4_note_on,
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.note_off = snd_opl4_note_off,
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.note_terminate = snd_opl4_terminate_note,
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.control = snd_opl4_control,
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.sysex = snd_opl4_sysex,
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};
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static int snd_opl4_seq_event_input(snd_seq_event_t *ev, int direct,
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void *private_data, int atomic, int hop)
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{
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opl4_t *opl4 = private_data;
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snd_midi_process_event(&opl4_ops, ev, opl4->chset);
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return 0;
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}
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static void snd_opl4_seq_free_port(void *private_data)
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{
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opl4_t *opl4 = private_data;
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snd_midi_channel_free_set(opl4->chset);
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}
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static int snd_opl4_seq_new_device(snd_seq_device_t *dev)
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{
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opl4_t *opl4;
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int client;
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snd_seq_client_callback_t callbacks;
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snd_seq_client_info_t cinfo;
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snd_seq_port_callback_t pcallbacks;
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opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
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if (!opl4)
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return -EINVAL;
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if (snd_yrw801_detect(opl4) < 0)
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return -ENODEV;
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opl4->chset = snd_midi_channel_alloc_set(16);
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if (!opl4->chset)
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return -ENOMEM;
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opl4->chset->private_data = opl4;
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/* allocate new client */
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memset(&callbacks, 0, sizeof(callbacks));
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callbacks.private_data = opl4;
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callbacks.allow_output = callbacks.allow_input = 1;
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client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num, &callbacks);
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if (client < 0) {
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snd_midi_channel_free_set(opl4->chset);
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return client;
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}
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opl4->seq_client = client;
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opl4->chset->client = client;
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/* change name of client */
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memset(&cinfo, 0, sizeof(cinfo));
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cinfo.client = client;
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cinfo.type = KERNEL_CLIENT;
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strcpy(cinfo.name, "OPL4 Wavetable");
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snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
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/* create new port */
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memset(&pcallbacks, 0, sizeof(pcallbacks));
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pcallbacks.owner = THIS_MODULE;
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pcallbacks.use = snd_opl4_seq_use;
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pcallbacks.unuse = snd_opl4_seq_unuse;
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pcallbacks.event_input = snd_opl4_seq_event_input;
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pcallbacks.private_free = snd_opl4_seq_free_port;
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pcallbacks.private_data = opl4;
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opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,
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SNDRV_SEQ_PORT_CAP_WRITE |
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SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
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SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
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SNDRV_SEQ_PORT_TYPE_MIDI_GM,
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16, 24,
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"OPL4 Wavetable Port");
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if (opl4->chset->port < 0) {
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int err = opl4->chset->port;
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snd_midi_channel_free_set(opl4->chset);
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snd_seq_delete_kernel_client(client);
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opl4->seq_client = -1;
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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_opl4_seq_delete_device(snd_seq_device_t *dev)
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{
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opl4_t *opl4;
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opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
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if (!opl4)
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return -EINVAL;
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if (opl4->seq_client >= 0) {
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snd_seq_delete_kernel_client(opl4->seq_client);
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opl4->seq_client = -1;
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}
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return 0;
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}
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static int __init alsa_opl4_synth_init(void)
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{
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static snd_seq_dev_ops_t ops = {
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snd_opl4_seq_new_device,
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snd_opl4_seq_delete_device
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};
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return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
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sizeof(opl4_t*));
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}
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static void __exit alsa_opl4_synth_exit(void)
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{
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snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
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}
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module_init(alsa_opl4_synth_init)
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module_exit(alsa_opl4_synth_exit)
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