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 0000000..e41b28d
--- /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;
+}