diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/synth/emux/emux_seq.c |
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'sound/synth/emux/emux_seq.c')
-rw-r--r-- | sound/synth/emux/emux_seq.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/sound/synth/emux/emux_seq.c b/sound/synth/emux/emux_seq.c new file mode 100644 index 00000000000..e41b28d9bf5 --- /dev/null +++ b/sound/synth/emux/emux_seq.c @@ -0,0 +1,428 @@ +/* + * 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> + + +/* Prototypes for static functions */ +static void free_port(void *private); +static void snd_emux_init_port(snd_emux_port_t *p); +static int snd_emux_use(void *private_data, snd_seq_port_subscribe_t *info); +static int snd_emux_unuse(void *private_data, snd_seq_port_subscribe_t *info); +static int get_client(snd_card_t *card, int index, char *name); + +/* + * MIDI emulation operators + */ +static snd_midi_op_t emux_ops = { + snd_emux_note_on, + snd_emux_note_off, + snd_emux_key_press, + snd_emux_terminate_note, + snd_emux_control, + snd_emux_nrpn, + 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_DIRECT_SAMPLE) + +/* + * 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(snd_emux_t *emu, snd_card_t *card, int index) +{ + int i; + snd_seq_port_callback_t pinfo; + char tmpname[64]; + + sprintf(tmpname, "%s WaveTable", emu->name); + emu->client = get_client(card, index, tmpname); + if (emu->client < 0) { + snd_printk("can't create client\n"); + return -ENODEV; + } + + if (emu->num_ports < 0) { + snd_printk("seqports must be greater than zero\n"); + emu->num_ports = 1; + } else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) { + snd_printk("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++) { + snd_emux_port_t *p; + + sprintf(tmpname, "%s Port %d", emu->name, i); + p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS, + 0, &pinfo); + if (p == NULL) { + snd_printk("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(snd_emux_t *emu) +{ + if (emu->voices) + snd_emux_terminate_all(emu); + + down(&emu->register_mutex); + if (emu->client >= 0) { + snd_seq_delete_kernel_client(emu->client); + emu->client = -1; + } + up(&emu->register_mutex); +} + + +/* + * create a sequencer port and channel_set + */ + +snd_emux_port_t * +snd_emux_create_port(snd_emux_t *emu, char *name, + int max_channels, int oss_port, + snd_seq_port_callback_t *callback) +{ + snd_emux_port_t *p; + int i, type, cap; + + /* Allocate structures for this channel */ + if ((p = kcalloc(1, sizeof(*p), GFP_KERNEL)) == NULL) { + snd_printk("no memory\n"); + return NULL; + } + p->chset.channels = kcalloc(max_channels, sizeof(snd_midi_channel_t), GFP_KERNEL); + if (p->chset.channels == NULL) { + snd_printk("no memory\n"); + 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) +{ + snd_emux_port_t *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(snd_emux_port_t *p) +{ + p->drum_flags = DEFAULT_DRUM_FLAGS; + p->volume_atten = 0; + + snd_emux_reset_port(p); +} + + +/* + * reset port + */ +void +snd_emux_reset_port(snd_emux_port_t *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++) { + snd_midi_channel_t *chan = port->chset.channels + i; + chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0; + } +} + + +/* + * input sequencer event + */ +int +snd_emux_event_input(snd_seq_event_t *ev, int direct, void *private_data, + int atomic, int hop) +{ + snd_emux_port_t *port; + + port = private_data; + snd_assert(port != NULL && ev != NULL, return -EINVAL); + + snd_midi_process_event(&emux_ops, ev, &port->chset); + + return 0; +} + + +/* + * increment usage count + */ +int +snd_emux_inc_count(snd_emux_t *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; +} + + +/* + * decrease usage count + */ +void +snd_emux_dec_count(snd_emux_t *emu) +{ + module_put(emu->card->module); + emu->used--; + if (emu->used <= 0) + snd_emux_terminate_all(emu); + module_put(emu->ops.owner); +} + + +/* + * Routine that is called upon a first use of a particular port + */ +static int +snd_emux_use(void *private_data, snd_seq_port_subscribe_t *info) +{ + snd_emux_port_t *p; + snd_emux_t *emu; + + p = private_data; + snd_assert(p != NULL, return -EINVAL); + emu = p->emu; + snd_assert(emu != NULL, return -EINVAL); + + down(&emu->register_mutex); + snd_emux_init_port(p); + snd_emux_inc_count(emu); + up(&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, snd_seq_port_subscribe_t *info) +{ + snd_emux_port_t *p; + snd_emux_t *emu; + + p = private_data; + snd_assert(p != NULL, return -EINVAL); + emu = p->emu; + snd_assert(emu != NULL, return -EINVAL); + + down(&emu->register_mutex); + snd_emux_sounds_off_all(p); + snd_emux_dec_count(emu); + up(&emu->register_mutex); + return 0; +} + + +/* + * Create a sequencer client + */ +static int +get_client(snd_card_t *card, int index, char *name) +{ + snd_seq_client_callback_t callbacks; + snd_seq_client_info_t cinfo; + int client; + + memset(&callbacks, 0, sizeof(callbacks)); + callbacks.private_data = NULL; + callbacks.allow_input = 1; + callbacks.allow_output = 1; + + /* Find a free client, start from 1 as the MPU expects to use 0 */ + client = snd_seq_create_kernel_client(card, index, &callbacks); + if (client < 0) + return client; + + memset(&cinfo, 0, sizeof(cinfo)); + cinfo.client = client; + cinfo.type = KERNEL_CLIENT; + strcpy(cinfo.name, name); + snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo); + + return client; +} + + +/* + * attach virtual rawmidi devices + */ +int snd_emux_init_virmidi(snd_emux_t *emu, snd_card_t *card) +{ + int i; + + emu->vmidi = NULL; + if (emu->midi_ports <= 0) + return 0; + + emu->vmidi = kcalloc(emu->midi_ports, sizeof(snd_rawmidi_t*), GFP_KERNEL); + if (emu->vmidi == NULL) + return -ENOMEM; + + for (i = 0; i < emu->midi_ports; i++) { + snd_rawmidi_t *rmidi; + snd_virmidi_dev_t *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("virmidi %d ok\n", i); + } + return 0; + +__error: + //snd_printk("error init..\n"); + snd_emux_delete_virmidi(emu); + return -ENOMEM; +} + +int snd_emux_delete_virmidi(snd_emux_t *emu) +{ + int i; + + if (emu->vmidi == NULL) + 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; +} |