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!
diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c
new file mode 100644
index 0000000..18247db
--- /dev/null
+++ b/sound/core/seq/seq_midi.c
@@ -0,0 +1,489 @@
+/*
+ * Generic MIDI synth driver for ALSA sequencer
+ * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
+ * Jaroslav Kysela <perex@suse.cz>
+ *
+ * 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
+ *
+ */
+
+/*
+Possible options for midisynth module:
+ - automatic opening of midi ports on first received event or subscription
+ (close will be performed when client leaves)
+*/
+
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/moduleparam.h>
+#include <asm/semaphore.h>
+#include <sound/core.h>
+#include <sound/rawmidi.h>
+#include <sound/seq_kernel.h>
+#include <sound/seq_device.h>
+#include <sound/seq_midi_event.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI synth.");
+MODULE_LICENSE("GPL");
+static int output_buffer_size = PAGE_SIZE;
+module_param(output_buffer_size, int, 0644);
+MODULE_PARM_DESC(output_buffer_size, "Output buffer size in bytes.");
+static int input_buffer_size = PAGE_SIZE;
+module_param(input_buffer_size, int, 0644);
+MODULE_PARM_DESC(input_buffer_size, "Input buffer size in bytes.");
+
+/* data for this midi synth driver */
+typedef struct {
+ snd_card_t *card;
+ int device;
+ int subdevice;
+ snd_rawmidi_file_t input_rfile;
+ snd_rawmidi_file_t output_rfile;
+ int seq_client;
+ int seq_port;
+ snd_midi_event_t *parser;
+} seq_midisynth_t;
+
+typedef struct {
+ int seq_client;
+ int num_ports;
+ int ports_per_device[SNDRV_RAWMIDI_DEVICES];
+ seq_midisynth_t *ports[SNDRV_RAWMIDI_DEVICES];
+} seq_midisynth_client_t;
+
+static seq_midisynth_client_t *synths[SNDRV_CARDS];
+static DECLARE_MUTEX(register_mutex);
+
+/* handle rawmidi input event (MIDI v1.0 stream) */
+static void snd_midi_input_event(snd_rawmidi_substream_t * substream)
+{
+ snd_rawmidi_runtime_t *runtime;
+ seq_midisynth_t *msynth;
+ snd_seq_event_t ev;
+ char buf[16], *pbuf;
+ long res, count;
+
+ if (substream == NULL)
+ return;
+ runtime = substream->runtime;
+ msynth = (seq_midisynth_t *) runtime->private_data;
+ if (msynth == NULL)
+ return;
+ memset(&ev, 0, sizeof(ev));
+ while (runtime->avail > 0) {
+ res = snd_rawmidi_kernel_read(substream, buf, sizeof(buf));
+ if (res <= 0)
+ continue;
+ if (msynth->parser == NULL)
+ continue;
+ pbuf = buf;
+ while (res > 0) {
+ count = snd_midi_event_encode(msynth->parser, pbuf, res, &ev);
+ if (count < 0)
+ break;
+ pbuf += count;
+ res -= count;
+ if (ev.type != SNDRV_SEQ_EVENT_NONE) {
+ ev.source.port = msynth->seq_port;
+ ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
+ snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0);
+ /* clear event and reset header */
+ memset(&ev, 0, sizeof(ev));
+ }
+ }
+ }
+}
+
+static int dump_midi(snd_rawmidi_substream_t *substream, const char *buf, int count)
+{
+ snd_rawmidi_runtime_t *runtime;
+ int tmp;
+
+ snd_assert(substream != NULL || buf != NULL, return -EINVAL);
+ runtime = substream->runtime;
+ if ((tmp = runtime->avail) < count) {
+ snd_printd("warning, output event was lost (count = %i, available = %i)\n", count, tmp);
+ return -ENOMEM;
+ }
+ if (snd_rawmidi_kernel_write(substream, buf, count) < count)
+ return -EINVAL;
+ return 0;
+}
+
+static int event_process_midi(snd_seq_event_t * ev, int direct,
+ void *private_data, int atomic, int hop)
+{
+ seq_midisynth_t *msynth = (seq_midisynth_t *) private_data;
+ unsigned char msg[10]; /* buffer for constructing midi messages */
+ snd_rawmidi_substream_t *substream;
+ int res;
+
+ snd_assert(msynth != NULL, return -EINVAL);
+ substream = msynth->output_rfile.output;
+ if (substream == NULL)
+ return -ENODEV;
+ if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */
+ if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) {
+ /* invalid event */
+ snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags);
+ return 0;
+ }
+ res = snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream);
+ snd_midi_event_reset_decode(msynth->parser);
+ if (res < 0)
+ return res;
+ } else {
+ if (msynth->parser == NULL)
+ return -EIO;
+ res = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev);
+ if (res < 0)
+ return res;
+ if ((res = dump_midi(substream, msg, res)) < 0) {
+ snd_midi_event_reset_decode(msynth->parser);
+ return res;
+ }
+ }
+ return 0;
+}
+
+
+static int snd_seq_midisynth_new(seq_midisynth_t *msynth,
+ snd_card_t *card,
+ int device,
+ int subdevice)
+{
+ if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &msynth->parser) < 0)
+ return -ENOMEM;
+ msynth->card = card;
+ msynth->device = device;
+ msynth->subdevice = subdevice;
+ return 0;
+}
+
+/* open associated midi device for input */
+static int midisynth_subscribe(void *private_data, snd_seq_port_subscribe_t *info)
+{
+ int err;
+ seq_midisynth_t *msynth = (seq_midisynth_t *)private_data;
+ snd_rawmidi_runtime_t *runtime;
+ snd_rawmidi_params_t params;
+
+ /* open midi port */
+ if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_INPUT, &msynth->input_rfile)) < 0) {
+ snd_printd("midi input open failed!!!\n");
+ return err;
+ }
+ runtime = msynth->input_rfile.input->runtime;
+ memset(¶ms, 0, sizeof(params));
+ params.avail_min = 1;
+ params.buffer_size = input_buffer_size;
+ if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, ¶ms)) < 0) {
+ snd_rawmidi_kernel_release(&msynth->input_rfile);
+ return err;
+ }
+ snd_midi_event_reset_encode(msynth->parser);
+ runtime->event = snd_midi_input_event;
+ runtime->private_data = msynth;
+ snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0);
+ return 0;
+}
+
+/* close associated midi device for input */
+static int midisynth_unsubscribe(void *private_data, snd_seq_port_subscribe_t *info)
+{
+ int err;
+ seq_midisynth_t *msynth = (seq_midisynth_t *)private_data;
+
+ snd_assert(msynth->input_rfile.input != NULL, return -EINVAL);
+ err = snd_rawmidi_kernel_release(&msynth->input_rfile);
+ return err;
+}
+
+/* open associated midi device for output */
+static int midisynth_use(void *private_data, snd_seq_port_subscribe_t *info)
+{
+ int err;
+ seq_midisynth_t *msynth = (seq_midisynth_t *)private_data;
+ snd_rawmidi_params_t params;
+
+ /* open midi port */
+ if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_OUTPUT, &msynth->output_rfile)) < 0) {
+ snd_printd("midi output open failed!!!\n");
+ return err;
+ }
+ memset(¶ms, 0, sizeof(params));
+ params.avail_min = 1;
+ params.buffer_size = output_buffer_size;
+ if ((err = snd_rawmidi_output_params(msynth->output_rfile.output, ¶ms)) < 0) {
+ snd_rawmidi_kernel_release(&msynth->output_rfile);
+ return err;
+ }
+ snd_midi_event_reset_decode(msynth->parser);
+ return 0;
+}
+
+/* close associated midi device for output */
+static int midisynth_unuse(void *private_data, snd_seq_port_subscribe_t *info)
+{
+ seq_midisynth_t *msynth = (seq_midisynth_t *)private_data;
+ unsigned char buf = 0xff; /* MIDI reset */
+
+ snd_assert(msynth->output_rfile.output != NULL, return -EINVAL);
+ /* sending single MIDI reset message to shut the device up */
+ snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1);
+ snd_rawmidi_drain_output(msynth->output_rfile.output);
+ return snd_rawmidi_kernel_release(&msynth->output_rfile);
+}
+
+/* delete given midi synth port */
+static void snd_seq_midisynth_delete(seq_midisynth_t *msynth)
+{
+ if (msynth == NULL)
+ return;
+
+ if (msynth->seq_client > 0) {
+ /* delete port */
+ snd_seq_event_port_detach(msynth->seq_client, msynth->seq_port);
+ }
+
+ if (msynth->parser)
+ snd_midi_event_free(msynth->parser);
+}
+
+/* set our client name */
+static int set_client_name(seq_midisynth_client_t *client, snd_card_t *card,
+ snd_rawmidi_info_t *rmidi)
+{
+ snd_seq_client_info_t cinfo;
+ const char *name;
+
+ memset(&cinfo, 0, sizeof(cinfo));
+ cinfo.client = client->seq_client;
+ cinfo.type = KERNEL_CLIENT;
+ name = rmidi->name[0] ? (const char *)rmidi->name : "External MIDI";
+ strlcpy(cinfo.name, name, sizeof(cinfo.name));
+ return snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
+}
+
+/* register new midi synth port */
+static int
+snd_seq_midisynth_register_port(snd_seq_device_t *dev)
+{
+ seq_midisynth_client_t *client;
+ seq_midisynth_t *msynth, *ms;
+ snd_seq_port_info_t *port;
+ snd_rawmidi_info_t *info;
+ int newclient = 0;
+ unsigned int p, ports;
+ snd_seq_client_callback_t callbacks;
+ snd_seq_port_callback_t pcallbacks;
+ snd_card_t *card = dev->card;
+ int device = dev->device;
+ unsigned int input_count = 0, output_count = 0;
+
+ snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL);
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (! info)
+ return -ENOMEM;
+ info->device = device;
+ info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
+ info->subdevice = 0;
+ if (snd_rawmidi_info_select(card, info) >= 0)
+ output_count = info->subdevices_count;
+ info->stream = SNDRV_RAWMIDI_STREAM_INPUT;
+ if (snd_rawmidi_info_select(card, info) >= 0) {
+ input_count = info->subdevices_count;
+ }
+ ports = output_count;
+ if (ports < input_count)
+ ports = input_count;
+ if (ports == 0) {
+ kfree(info);
+ return -ENODEV;
+ }
+ if (ports > (256 / SNDRV_RAWMIDI_DEVICES))
+ ports = 256 / SNDRV_RAWMIDI_DEVICES;
+
+ down(®ister_mutex);
+ client = synths[card->number];
+ if (client == NULL) {
+ newclient = 1;
+ client = kcalloc(1, sizeof(*client), GFP_KERNEL);
+ if (client == NULL) {
+ up(®ister_mutex);
+ kfree(info);
+ return -ENOMEM;
+ }
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.private_data = client;
+ callbacks.allow_input = callbacks.allow_output = 1;
+ client->seq_client = snd_seq_create_kernel_client(card, 0, &callbacks);
+ if (client->seq_client < 0) {
+ kfree(client);
+ up(®ister_mutex);
+ kfree(info);
+ return -ENOMEM;
+ }
+ set_client_name(client, card, info);
+ } else if (device == 0)
+ set_client_name(client, card, info); /* use the first device's name */
+
+ msynth = kcalloc(ports, sizeof(seq_midisynth_t), GFP_KERNEL);
+ port = kmalloc(sizeof(*port), GFP_KERNEL);
+ if (msynth == NULL || port == NULL)
+ goto __nomem;
+
+ for (p = 0; p < ports; p++) {
+ ms = &msynth[p];
+
+ if (snd_seq_midisynth_new(ms, card, device, p) < 0)
+ goto __nomem;
+
+ /* declare port */
+ memset(port, 0, sizeof(*port));
+ port->addr.client = client->seq_client;
+ port->addr.port = device * (256 / SNDRV_RAWMIDI_DEVICES) + p;
+ port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT;
+ memset(info, 0, sizeof(*info));
+ info->device = device;
+ if (p < output_count)
+ info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
+ else
+ info->stream = SNDRV_RAWMIDI_STREAM_INPUT;
+ info->subdevice = p;
+ if (snd_rawmidi_info_select(card, info) >= 0)
+ strcpy(port->name, info->subname);
+ if (! port->name[0]) {
+ if (info->name[0]) {
+ if (ports > 1)
+ snprintf(port->name, sizeof(port->name), "%s-%d", info->name, p);
+ else
+ snprintf(port->name, sizeof(port->name), "%s", info->name);
+ } else {
+ /* last resort */
+ if (ports > 1)
+ sprintf(port->name, "MIDI %d-%d-%d", card->number, device, p);
+ else
+ sprintf(port->name, "MIDI %d-%d", card->number, device);
+ }
+ }
+ if ((info->flags & SNDRV_RAWMIDI_INFO_OUTPUT) && p < output_count)
+ port->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
+ if ((info->flags & SNDRV_RAWMIDI_INFO_INPUT) && p < input_count)
+ port->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ;
+ if ((port->capability & (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ)) == (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ) &&
+ info->flags & SNDRV_RAWMIDI_INFO_DUPLEX)
+ port->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX;
+ port->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC;
+ port->midi_channels = 16;
+ memset(&pcallbacks, 0, sizeof(pcallbacks));
+ pcallbacks.owner = THIS_MODULE;
+ pcallbacks.private_data = ms;
+ pcallbacks.subscribe = midisynth_subscribe;
+ pcallbacks.unsubscribe = midisynth_unsubscribe;
+ pcallbacks.use = midisynth_use;
+ pcallbacks.unuse = midisynth_unuse;
+ pcallbacks.event_input = event_process_midi;
+ port->kernel = &pcallbacks;
+ if (snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port)<0)
+ goto __nomem;
+ ms->seq_client = client->seq_client;
+ ms->seq_port = port->addr.port;
+ }
+ client->ports_per_device[device] = ports;
+ client->ports[device] = msynth;
+ client->num_ports++;
+ if (newclient)
+ synths[card->number] = client;
+ up(®ister_mutex);
+ return 0; /* success */
+
+ __nomem:
+ if (msynth != NULL) {
+ for (p = 0; p < ports; p++)
+ snd_seq_midisynth_delete(&msynth[p]);
+ kfree(msynth);
+ }
+ if (newclient) {
+ snd_seq_delete_kernel_client(client->seq_client);
+ kfree(client);
+ }
+ kfree(info);
+ kfree(port);
+ up(®ister_mutex);
+ return -ENOMEM;
+}
+
+/* release midi synth port */
+static int
+snd_seq_midisynth_unregister_port(snd_seq_device_t *dev)
+{
+ seq_midisynth_client_t *client;
+ seq_midisynth_t *msynth;
+ snd_card_t *card = dev->card;
+ int device = dev->device, p, ports;
+
+ down(®ister_mutex);
+ client = synths[card->number];
+ if (client == NULL || client->ports[device] == NULL) {
+ up(®ister_mutex);
+ return -ENODEV;
+ }
+ ports = client->ports_per_device[device];
+ client->ports_per_device[device] = 0;
+ msynth = client->ports[device];
+ client->ports[device] = NULL;
+ snd_runtime_check(msynth != NULL || ports <= 0, goto __skip);
+ for (p = 0; p < ports; p++)
+ snd_seq_midisynth_delete(&msynth[p]);
+ kfree(msynth);
+ __skip:
+ client->num_ports--;
+ if (client->num_ports <= 0) {
+ snd_seq_delete_kernel_client(client->seq_client);
+ synths[card->number] = NULL;
+ kfree(client);
+ }
+ up(®ister_mutex);
+ return 0;
+}
+
+
+static int __init alsa_seq_midi_init(void)
+{
+ static snd_seq_dev_ops_t ops = {
+ snd_seq_midisynth_register_port,
+ snd_seq_midisynth_unregister_port,
+ };
+ memset(&synths, 0, sizeof(synths));
+ snd_seq_autoload_lock();
+ snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0);
+ snd_seq_autoload_unlock();
+ return 0;
+}
+
+static void __exit alsa_seq_midi_exit(void)
+{
+ snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH);
+}
+
+module_init(alsa_seq_midi_init)
+module_exit(alsa_seq_midi_exit)