diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/synth/emux/emux_seq.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/sound/synth/emux/emux_seq.c b/sound/synth/emux/emux_seq.c new file mode 100644 index 000000000..396c406d0 --- /dev/null +++ b/sound/synth/emux/emux_seq.c @@ -0,0 +1,416 @@ +/* + * Midi Sequencer interface routines. + * + * Copyright (C) 1999 Steve Ratcliffe + * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "emux_voice.h" +#include <linux/slab.h> +#include <linux/module.h> + +/* Prototypes for static functions */ +static void free_port(void *private); +static void snd_emux_init_port(struct snd_emux_port *p); +static int snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info); +static int snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info); + +/* + * MIDI emulation operators + */ +static struct snd_midi_op emux_ops = { + .note_on = snd_emux_note_on, + .note_off = snd_emux_note_off, + .key_press = snd_emux_key_press, + .note_terminate = snd_emux_terminate_note, + .control = snd_emux_control, + .nrpn = snd_emux_nrpn, + .sysex = snd_emux_sysex, +}; + + +/* + * number of MIDI channels + */ +#define MIDI_CHANNELS 16 + +/* + * type flags for MIDI sequencer port + */ +#define DEFAULT_MIDI_TYPE (SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |\ + SNDRV_SEQ_PORT_TYPE_MIDI_GM |\ + SNDRV_SEQ_PORT_TYPE_MIDI_GS |\ + SNDRV_SEQ_PORT_TYPE_MIDI_XG |\ + SNDRV_SEQ_PORT_TYPE_HARDWARE |\ + SNDRV_SEQ_PORT_TYPE_SYNTHESIZER) + +/* + * Initialise the EMUX Synth by creating a client and registering + * a series of ports. + * Each of the ports will contain the 16 midi channels. Applications + * can connect to these ports to play midi data. + */ +int +snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index) +{ + int i; + struct snd_seq_port_callback pinfo; + char tmpname[64]; + + emu->client = snd_seq_create_kernel_client(card, index, + "%s WaveTable", emu->name); + if (emu->client < 0) { + snd_printk(KERN_ERR "can't create client\n"); + return -ENODEV; + } + + if (emu->num_ports < 0) { + snd_printk(KERN_WARNING "seqports must be greater than zero\n"); + emu->num_ports = 1; + } else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) { + snd_printk(KERN_WARNING "too many ports." + "limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS); + emu->num_ports = SNDRV_EMUX_MAX_PORTS; + } + + memset(&pinfo, 0, sizeof(pinfo)); + pinfo.owner = THIS_MODULE; + pinfo.use = snd_emux_use; + pinfo.unuse = snd_emux_unuse; + pinfo.event_input = snd_emux_event_input; + + for (i = 0; i < emu->num_ports; i++) { + struct snd_emux_port *p; + + sprintf(tmpname, "%s Port %d", emu->name, i); + p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS, + 0, &pinfo); + if (!p) { + snd_printk(KERN_ERR "can't create port\n"); + return -ENOMEM; + } + + p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI; + snd_emux_init_port(p); + emu->ports[i] = p->chset.port; + emu->portptrs[i] = p; + } + + return 0; +} + + +/* + * Detach from the ports that were set up for this synthesizer and + * destroy the kernel client. + */ +void +snd_emux_detach_seq(struct snd_emux *emu) +{ + if (emu->voices) + snd_emux_terminate_all(emu); + + if (emu->client >= 0) { + snd_seq_delete_kernel_client(emu->client); + emu->client = -1; + } +} + + +/* + * create a sequencer port and channel_set + */ + +struct snd_emux_port * +snd_emux_create_port(struct snd_emux *emu, char *name, + int max_channels, int oss_port, + struct snd_seq_port_callback *callback) +{ + struct snd_emux_port *p; + int i, type, cap; + + /* Allocate structures for this channel */ + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) + return NULL; + + p->chset.channels = kcalloc(max_channels, sizeof(*p->chset.channels), + GFP_KERNEL); + if (!p->chset.channels) { + kfree(p); + return NULL; + } + for (i = 0; i < max_channels; i++) + p->chset.channels[i].number = i; + p->chset.private_data = p; + p->chset.max_channels = max_channels; + p->emu = emu; + p->chset.client = emu->client; +#ifdef SNDRV_EMUX_USE_RAW_EFFECT + snd_emux_create_effect(p); +#endif + callback->private_free = free_port; + callback->private_data = p; + + cap = SNDRV_SEQ_PORT_CAP_WRITE; + if (oss_port) { + type = SNDRV_SEQ_PORT_TYPE_SPECIFIC; + } else { + type = DEFAULT_MIDI_TYPE; + cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE; + } + + p->chset.port = snd_seq_event_port_attach(emu->client, callback, + cap, type, max_channels, + emu->max_voices, name); + + return p; +} + + +/* + * release memory block for port + */ +static void +free_port(void *private_data) +{ + struct snd_emux_port *p; + + p = private_data; + if (p) { +#ifdef SNDRV_EMUX_USE_RAW_EFFECT + snd_emux_delete_effect(p); +#endif + kfree(p->chset.channels); + kfree(p); + } +} + + +#define DEFAULT_DRUM_FLAGS (1<<9) + +/* + * initialize the port specific parameters + */ +static void +snd_emux_init_port(struct snd_emux_port *p) +{ + p->drum_flags = DEFAULT_DRUM_FLAGS; + p->volume_atten = 0; + + snd_emux_reset_port(p); +} + + +/* + * reset port + */ +void +snd_emux_reset_port(struct snd_emux_port *port) +{ + int i; + + /* stop all sounds */ + snd_emux_sounds_off_all(port); + + snd_midi_channel_set_clear(&port->chset); + +#ifdef SNDRV_EMUX_USE_RAW_EFFECT + snd_emux_clear_effect(port); +#endif + + /* set port specific control parameters */ + port->ctrls[EMUX_MD_DEF_BANK] = 0; + port->ctrls[EMUX_MD_DEF_DRUM] = 0; + port->ctrls[EMUX_MD_REALTIME_PAN] = 1; + + for (i = 0; i < port->chset.max_channels; i++) { + struct snd_midi_channel *chan = port->chset.channels + i; + chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0; + } +} + + +/* + * input sequencer event + */ +int +snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data, + int atomic, int hop) +{ + struct snd_emux_port *port; + + port = private_data; + if (snd_BUG_ON(!port || !ev)) + return -EINVAL; + + snd_midi_process_event(&emux_ops, ev, &port->chset); + + return 0; +} + + +/* + * increment usage count + */ +static int +__snd_emux_inc_count(struct snd_emux *emu) +{ + emu->used++; + if (!try_module_get(emu->ops.owner)) + goto __error; + if (!try_module_get(emu->card->module)) { + module_put(emu->ops.owner); + __error: + emu->used--; + return 0; + } + return 1; +} + +int snd_emux_inc_count(struct snd_emux *emu) +{ + int ret; + + mutex_lock(&emu->register_mutex); + ret = __snd_emux_inc_count(emu); + mutex_unlock(&emu->register_mutex); + return ret; +} + +/* + * decrease usage count + */ +static void +__snd_emux_dec_count(struct snd_emux *emu) +{ + module_put(emu->card->module); + emu->used--; + if (emu->used <= 0) + snd_emux_terminate_all(emu); + module_put(emu->ops.owner); +} + +void snd_emux_dec_count(struct snd_emux *emu) +{ + mutex_lock(&emu->register_mutex); + __snd_emux_dec_count(emu); + mutex_unlock(&emu->register_mutex); +} + +/* + * Routine that is called upon a first use of a particular port + */ +static int +snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info) +{ + struct snd_emux_port *p; + struct snd_emux *emu; + + p = private_data; + if (snd_BUG_ON(!p)) + return -EINVAL; + emu = p->emu; + if (snd_BUG_ON(!emu)) + return -EINVAL; + + mutex_lock(&emu->register_mutex); + snd_emux_init_port(p); + __snd_emux_inc_count(emu); + mutex_unlock(&emu->register_mutex); + return 0; +} + +/* + * Routine that is called upon the last unuse() of a particular port. + */ +static int +snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info) +{ + struct snd_emux_port *p; + struct snd_emux *emu; + + p = private_data; + if (snd_BUG_ON(!p)) + return -EINVAL; + emu = p->emu; + if (snd_BUG_ON(!emu)) + return -EINVAL; + + mutex_lock(&emu->register_mutex); + snd_emux_sounds_off_all(p); + __snd_emux_dec_count(emu); + mutex_unlock(&emu->register_mutex); + return 0; +} + + +/* + * attach virtual rawmidi devices + */ +int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card) +{ + int i; + + emu->vmidi = NULL; + if (emu->midi_ports <= 0) + return 0; + + emu->vmidi = kcalloc(emu->midi_ports, sizeof(*emu->vmidi), GFP_KERNEL); + if (!emu->vmidi) + return -ENOMEM; + + for (i = 0; i < emu->midi_ports; i++) { + struct snd_rawmidi *rmidi; + struct snd_virmidi_dev *rdev; + if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0) + goto __error; + rdev = rmidi->private_data; + sprintf(rmidi->name, "%s Synth MIDI", emu->name); + rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH; + rdev->client = emu->client; + rdev->port = emu->ports[i]; + if (snd_device_register(card, rmidi) < 0) { + snd_device_free(card, rmidi); + goto __error; + } + emu->vmidi[i] = rmidi; + /* snd_printk(KERN_DEBUG "virmidi %d ok\n", i); */ + } + return 0; + +__error: + /* snd_printk(KERN_DEBUG "error init..\n"); */ + snd_emux_delete_virmidi(emu); + return -ENOMEM; +} + +int snd_emux_delete_virmidi(struct snd_emux *emu) +{ + int i; + + if (!emu->vmidi) + return 0; + + for (i = 0; i < emu->midi_ports; i++) { + if (emu->vmidi[i]) + snd_device_free(emu->card, emu->vmidi[i]); + } + kfree(emu->vmidi); + emu->vmidi = NULL; + return 0; +} |