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-rw-r--r--sys/i386/isa/sound/sequencer.c1822
1 files changed, 1822 insertions, 0 deletions
diff --git a/sys/i386/isa/sound/sequencer.c b/sys/i386/isa/sound/sequencer.c
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--- /dev/null
+++ b/sys/i386/isa/sound/sequencer.c
@@ -0,0 +1,1822 @@
+/*
+ * sound/sequencer.c
+ *
+ * The sequencer personality manager.
+ *
+ * Copyright by Hannu Savolainen 1993
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer. 2.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#define SEQUENCER_C
+#include <i386/isa/sound/sound_config.h>
+
+#if NSND > 0
+
+#ifdef CONFIG_SEQUENCER
+
+#include <i386/isa/sound/midi_ctrl.h>
+
+static void seq_drain_midi_queues(void);
+int
+sequencer_poll (int dev, struct fileinfo *file, int events, select_table * wait);
+static int sequencer_ok = 0;
+static struct sound_timer_operations *tmr;
+static int tmr_no = -1; /* Currently selected timer */
+static int pending_timer = -1; /* For timer change operation */
+
+/*
+ * Local counts for number of synth and MIDI devices. These are initialized
+ * by the sequencer_open.
+ */
+static int max_mididev = 0;
+static int max_synthdev = 0;
+
+/*
+ * The seq_mode gives the operating mode of the sequencer: 1 = level1 (the
+ * default) 2 = level2 (extended capabilites)
+ */
+
+#define SEQ_1 1
+#define SEQ_2 2
+static int seq_mode = SEQ_1;
+
+static int *seq_sleeper = NULL;
+static volatile struct snd_wait seq_sleep_flag = {0};
+static int *midi_sleeper = NULL;
+static volatile struct snd_wait midi_sleep_flag = {0};
+
+static int midi_opened[MAX_MIDI_DEV] = {0};
+static int midi_written[MAX_MIDI_DEV] = {0};
+
+static u_long prev_input_time = 0;
+static int prev_event_time;
+static u_long seq_time = 0;
+
+#include <i386/isa/sound/tuning.h>
+
+#define EV_SZ 8
+#define IEV_SZ 8
+static u_char *queue = NULL;
+static u_char *iqueue = NULL;
+
+static volatile int qhead = 0, qtail = 0, qlen = 0;
+static volatile int iqhead = 0, iqtail = 0, iqlen = 0;
+static volatile int seq_playing = 0;
+static volatile int sequencer_busy = 0;
+static int output_treshold;
+static int pre_event_timeout;
+static u_int synth_open_mask;
+
+static int seq_queue(u_char *note, char nonblock);
+static void seq_startplay(void);
+static int seq_sync(void);
+static void seq_reset(void);
+static int pmgr_present[MAX_SYNTH_DEV] =
+{0};
+static struct callout_handle sequencertimeout_ch
+ = CALLOUT_HANDLE_INITIALIZER(&sequencertimeout_ch);
+
+#if MAX_SYNTH_DEV > 15
+#error Too many synthesizer devices enabled.
+#endif
+
+/*
+ * sound_timer stuff -- originally in soundcard.c
+ *
+ * A negative value means a relative timeout in |count| ticks.
+ * A positive value is used for what ?
+ *
+ * In any case, this is only used in sequencer.c
+ */
+
+static int timer_running = 0;
+
+void
+request_sound_timer(int count)
+{
+ static int current = 0;
+ int tmp = count;
+
+ if (count < 0)
+ sequencertimeout_ch = timeout(sequencer_timer, 0, -count);
+ else {
+
+ if (count < current)
+ current = 0; /* Timer restarted */
+
+ count = count - current;
+ current = tmp;
+ if (!count)
+ count = 1;
+ sequencertimeout_ch = timeout(sequencer_timer, 0, count);
+ }
+ timer_running = 1;
+}
+
+void
+sound_stop_timer(void)
+{
+ if (timer_running)
+ untimeout( sequencer_timer, 0, sequencertimeout_ch);
+ timer_running = 0;
+}
+
+int
+sequencer_read(int dev, struct fileinfo * file, snd_rw_buf * buf, int count)
+{
+ int c = count, p = 0;
+ int ev_len;
+ u_long flags;
+
+ dev = dev >> 4;
+
+ ev_len = seq_mode == SEQ_1 ? 4 : 8;
+
+ if (dev) /* Patch manager device */
+ return pmgr_read(dev - 1, file, buf, count);
+
+ flags = splhigh();
+ if (!iqlen) {
+ int chn;
+
+
+ midi_sleeper = &chn;
+ DO_SLEEP(chn, midi_sleep_flag, pre_event_timeout);
+
+ if (!iqlen) {
+ splx(flags);
+ return 0;
+ }
+ }
+ while (iqlen && c >= ev_len) {
+
+ if (uiomove((char *) &iqueue[iqhead * IEV_SZ], ev_len, buf))
+ printf("sb: Bad copyout()!\n");
+ p += ev_len;
+ c -= ev_len;
+
+ iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
+ iqlen--;
+ }
+ splx(flags);
+
+ return count - c;
+}
+
+static void
+sequencer_midi_output(int dev)
+{
+ /*
+ * Currently NOP
+ */
+}
+
+void
+seq_copy_to_input(u_char *event, int len)
+{
+ u_long flags;
+
+ /*
+ * Verify that the len is valid for the current mode.
+ */
+
+ if (len != 4 && len != 8)
+ return;
+ if ((seq_mode == SEQ_1) != (len == 4))
+ return;
+
+ if (iqlen >= (SEQ_MAX_QUEUE - 1))
+ return; /* Overflow */
+
+ flags = splhigh();
+ bcopy(event, &iqueue[iqtail * IEV_SZ], len);
+ iqlen++;
+ iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
+
+ if ((midi_sleep_flag.mode & WK_SLEEP)) {
+ midi_sleep_flag.mode = WK_WAKEUP;
+ wakeup(midi_sleeper);
+ }
+ splx(flags);
+}
+
+static void
+sequencer_midi_input(int dev, u_char data)
+{
+ u_int tstamp;
+ u_char event[4];
+
+ if (data == 0xfe) /* Ignore active sensing */
+ return;
+
+ tstamp = get_time() - seq_time;
+ if (tstamp != prev_input_time) {
+ tstamp = (tstamp << 8) | SEQ_WAIT;
+
+ seq_copy_to_input((u_char *) &tstamp, 4);
+ prev_input_time = tstamp;
+ }
+ event[0] = SEQ_MIDIPUTC;
+ event[1] = data;
+ event[2] = dev;
+ event[3] = 0;
+
+ seq_copy_to_input(event, 4);
+}
+
+void
+seq_input_event(u_char *event, int len)
+{
+ u_long this_time;
+
+ if (seq_mode == SEQ_2)
+ this_time = tmr->get_time(tmr_no);
+ else
+ this_time = get_time() - seq_time;
+
+ if (this_time != prev_input_time) {
+ u_char tmp_event[8];
+
+ tmp_event[0] = EV_TIMING;
+ tmp_event[1] = TMR_WAIT_ABS;
+ tmp_event[2] = 0;
+ tmp_event[3] = 0;
+ *(u_long *) &tmp_event[4] = this_time;
+
+ seq_copy_to_input(tmp_event, 8);
+ prev_input_time = this_time;
+ }
+ seq_copy_to_input(event, len);
+}
+
+int
+sequencer_write(int dev, struct fileinfo * file, snd_rw_buf * buf, int count)
+{
+ u_char event[EV_SZ], ev_code;
+ int p = 0, c, ev_size;
+ int err;
+ int mode = file->mode & O_ACCMODE;
+
+ dev = dev >> 4;
+
+ DEB(printf("sequencer_write(dev=%d, count=%d)\n", dev, count));
+
+ if (mode == OPEN_READ)
+ return -(EIO);
+
+ if (dev)
+ return pmgr_write(dev - 1, file, buf, count);
+
+ c = count;
+
+ while (c >= 4) {
+
+ if (uiomove((char *) event, 4, buf))
+ printf("sb: Bad copyin()!\n");
+ ev_code = event[0];
+
+ if (ev_code == SEQ_FULLSIZE) {
+ int err;
+
+ dev = *(u_short *) &event[2];
+ if (dev < 0 || dev >= max_synthdev)
+ return -(ENXIO);
+
+ if (!(synth_open_mask & (1 << dev)))
+ return -(ENXIO);
+
+ err = synth_devs[dev]->load_patch(dev,
+ *(short *) &event[0], buf, p + 4, c, 0);
+ if (err < 0)
+ return err;
+
+ return err;
+ }
+ if (ev_code >= 128) {
+ if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED) {
+ printf("Sequencer: Invalid level 2 event %x\n", ev_code);
+ return -(EINVAL);
+ }
+ ev_size = 8;
+
+ if (c < ev_size) {
+ if (!seq_playing)
+ seq_startplay();
+ return count - c;
+ }
+ if (uiomove((char *) &event[4], 4, buf))
+ printf("sb: Bad copyin()!\n");
+ } else {
+ if (seq_mode == SEQ_2) {
+ printf("Sequencer: 4 byte event in level 2 mode\n");
+ return -(EINVAL);
+ }
+ ev_size = 4;
+ }
+
+ if (event[0] == SEQ_MIDIPUTC) {
+
+ if (!midi_opened[event[2]]) {
+ int mode;
+ int dev = event[2];
+
+ if (dev >= max_mididev) {
+ printf("Sequencer Error: Nonexistent MIDI device %d\n",dev);
+ return -(ENXIO);
+ }
+ mode = file->mode & O_ACCMODE;
+
+ if ((err = midi_devs[dev]->open(dev, mode,
+ sequencer_midi_input, sequencer_midi_output)) < 0) {
+ seq_reset();
+ printf("Sequencer Error: Unable to open Midi #%d\n", dev);
+ return err;
+ }
+ midi_opened[dev] = 1;
+ }
+ }
+ if (!seq_queue(event, 0)) {
+ int processed = count - c;
+
+ if (!seq_playing)
+ seq_startplay();
+
+ if (!processed && 0)
+ return -(EAGAIN);
+ else
+ return processed;
+ }
+ p += ev_size;
+ c -= ev_size;
+ }
+
+ if (!seq_playing)
+ seq_startplay();
+
+ return count; /* This will "eat" chunks shorter than 4 bytes
+ * (if written alone) Should we really do that ?
+ */
+}
+
+static int
+seq_queue(u_char *note, char nonblock)
+{
+
+ /*
+ * Test if there is space in the queue
+ */
+
+ if (qlen >= SEQ_MAX_QUEUE)
+ if (!seq_playing)
+ seq_startplay(); /* Give chance to drain the queue */
+
+ if (!nonblock && qlen >= SEQ_MAX_QUEUE &&
+ !(seq_sleep_flag.mode & WK_SLEEP)) {
+ /*
+ * Sleep until there is enough space on the queue
+ */
+
+ int chn;
+
+
+ seq_sleeper = &chn;
+ DO_SLEEP(chn, seq_sleep_flag, 0);
+
+ }
+ if (qlen >= SEQ_MAX_QUEUE)
+ return 0; /* To be sure */
+ bcopy(note, &queue[qtail * EV_SZ], EV_SZ);
+
+ qtail = (qtail + 1) % SEQ_MAX_QUEUE;
+ qlen++;
+
+ return 1;
+}
+
+static int
+extended_event(u_char *q)
+{
+ int dev = q[2];
+
+ if (dev < 0 || dev >= max_synthdev)
+ return -(ENXIO);
+
+ if (!(synth_open_mask & (1 << dev)))
+ return -(ENXIO);
+
+ switch (q[1]) {
+ case SEQ_NOTEOFF:
+ synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
+ break;
+
+ case SEQ_NOTEON:
+ if (q[4] > 127 && q[4] != 255)
+ return 0;
+
+ synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
+ break;
+
+ case SEQ_PGMCHANGE:
+ synth_devs[dev]->set_instr(dev, q[3], q[4]);
+ break;
+
+ case SEQ_AFTERTOUCH:
+ synth_devs[dev]->aftertouch(dev, q[3], q[4]);
+ break;
+
+ case SEQ_BALANCE:
+ synth_devs[dev]->panning(dev, q[3], (char) q[4]);
+ break;
+
+ case SEQ_CONTROLLER:
+ synth_devs[dev]->controller(dev, q[3], q[4], *(short *) &q[5]);
+ break;
+
+ case SEQ_VOLMODE:
+ if (synth_devs[dev]->volume_method != NULL)
+ synth_devs[dev]->volume_method(dev, q[3]);
+ break;
+
+ default:
+ return -(EINVAL);
+ }
+
+ return 0;
+}
+
+static int
+find_voice(int dev, int chn, int note)
+{
+ u_short key;
+ int i;
+
+ key = (chn << 8) | (note + 1);
+
+ for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+ if (synth_devs[dev]->alloc.map[i] == key)
+ return i;
+
+ return -1;
+}
+
+static int
+alloc_voice(int dev, int chn, int note)
+{
+ u_short key;
+ int voice;
+
+ key = (chn << 8) | (note + 1);
+
+ voice = synth_devs[dev]->alloc_voice(dev, chn, note,
+ &synth_devs[dev]->alloc);
+ synth_devs[dev]->alloc.map[voice] = key;
+ synth_devs[dev]->alloc.alloc_times[voice] =
+ synth_devs[dev]->alloc.timestamp++;
+ return voice;
+}
+
+static void
+seq_chn_voice_event(u_char *event)
+{
+ u_char dev = event[1];
+ u_char cmd = event[2];
+ u_char chn = event[3];
+ u_char note = event[4];
+ u_char parm = event[5];
+ int voice = -1;
+
+ if ((int) dev > max_synthdev)
+ return;
+ if (!(synth_open_mask & (1 << dev)))
+ return;
+ if (!synth_devs[dev])
+ return;
+
+ if (seq_mode == SEQ_2) {
+ if (synth_devs[dev]->alloc_voice)
+ voice = find_voice(dev, chn, note);
+
+ if (cmd == MIDI_NOTEON && parm == 0) {
+ cmd = MIDI_NOTEOFF;
+ parm = 64;
+ }
+ }
+ switch (cmd) {
+ case MIDI_NOTEON:
+ if (note > 127 && note != 255) /* Not a seq2 feature */
+ return;
+
+ if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice) {
+ /* Internal synthesizer (FM, GUS, etc) */
+ voice = alloc_voice(dev, chn, note);
+ }
+ if (voice == -1)
+ voice = chn;
+
+ if (seq_mode == SEQ_2 && (int) dev < num_synths) {
+ /*
+ * The MIDI channel 10 is a percussive channel. Use
+ * the note number to select the proper patch (128 to
+ * 255) to play.
+ */
+
+ if (chn == 9) {
+ synth_devs[dev]->set_instr(dev, voice, 128 + note);
+ note = 60; /* Middle C */
+
+ }
+ }
+ if (seq_mode == SEQ_2)
+ synth_devs[dev]->setup_voice(dev, voice, chn);
+ synth_devs[dev]->start_note(dev, voice, note, parm);
+ break;
+
+ case MIDI_NOTEOFF:
+ if (voice == -1)
+ voice = chn;
+ synth_devs[dev]->kill_note(dev, voice, note, parm);
+ break;
+
+ case MIDI_KEY_PRESSURE:
+ if (voice == -1)
+ voice = chn;
+ synth_devs[dev]->aftertouch(dev, voice, parm);
+ break;
+
+ default:;
+ }
+}
+
+static void
+seq_chn_common_event(u_char *event)
+{
+ u_char dev = event[1];
+ u_char cmd = event[2];
+ u_char chn = event[3];
+ u_char p1 = event[4];
+
+ /* u_char p2 = event[5]; */
+ u_short w14 = *(short *) &event[6];
+
+ if ((int) dev > max_synthdev)
+ return;
+ if (!(synth_open_mask & (1 << dev)))
+ return;
+ if (!synth_devs[dev])
+ return;
+
+ switch (cmd) {
+ case MIDI_PGM_CHANGE:
+ if (seq_mode == SEQ_2) {
+ synth_devs[dev]->chn_info[chn].pgm_num = p1;
+ if ((int) dev >= num_synths)
+ synth_devs[dev]->set_instr(dev, chn, p1);
+ } else
+ synth_devs[dev]->set_instr(dev, chn, p1);
+
+ break;
+
+ case MIDI_CTL_CHANGE:
+ if (seq_mode == SEQ_2) {
+ if (chn > 15 || p1 > 127)
+ break;
+
+ synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
+
+ if (p1 < 32) /* Setting MSB should clear LSB to 0 */
+ synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
+
+ if ((int) dev < num_synths) {
+ int val = w14 & 0x7f;
+ int i, key;
+
+ if (p1 < 64) { /* Combine MSB and LSB */
+ val = ((synth_devs[dev]->
+ chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
+ | (synth_devs[dev]->
+ chn_info[chn].controllers[p1 | 32] & 0x7f);
+ p1 &= ~32;
+ }
+ /* Handle all playing notes on this channel */
+
+ key = ((int) chn << 8);
+
+ for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+ if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
+ synth_devs[dev]->controller(dev, i, p1, val);
+ } else
+ synth_devs[dev]->controller(dev, chn, p1, w14);
+ } else /* Mode 1 */
+ synth_devs[dev]->controller(dev, chn, p1, w14);
+ break;
+
+ case MIDI_PITCH_BEND:
+ if (seq_mode == SEQ_2) {
+ synth_devs[dev]->chn_info[chn].bender_value = w14;
+
+ if ((int) dev < num_synths) { /* Handle all playing
+ * notes on this channel */
+ int i, key;
+
+ key = (chn << 8);
+
+ for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+ if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
+ synth_devs[dev]->bender(dev, i, w14);
+ } else
+ synth_devs[dev]->bender(dev, chn, w14);
+ } else /* MODE 1 */
+ synth_devs[dev]->bender(dev, chn, w14);
+ break;
+
+ default:;
+ }
+}
+
+static int
+seq_timing_event(u_char *event)
+{
+ u_char cmd = event[1];
+ u_int parm = *(int *) &event[4];
+
+ if (seq_mode == SEQ_2) {
+ int ret;
+
+ if ((ret = tmr->event(tmr_no, event)) == TIMER_ARMED) {
+ if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) {
+ u_long flags;
+
+ flags = splhigh();
+ if ((seq_sleep_flag.mode & WK_SLEEP)) {
+ seq_sleep_flag.mode = WK_WAKEUP;
+ wakeup(seq_sleeper);
+ }
+ splx(flags);
+ }
+ }
+ return ret;
+ }
+ switch (cmd) {
+ case TMR_WAIT_REL:
+ parm += prev_event_time;
+
+ /*
+ * NOTE! No break here. Execution of TMR_WAIT_REL continues
+ * in the next case (TMR_WAIT_ABS)
+ */
+
+ case TMR_WAIT_ABS:
+ if (parm > 0) {
+ long time;
+
+ seq_playing = 1;
+ time = parm;
+ prev_event_time = time;
+
+ request_sound_timer(time);
+
+ if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) {
+ u_long flags;
+
+ flags = splhigh();
+ if ((seq_sleep_flag.mode & WK_SLEEP)) {
+ seq_sleep_flag.mode = WK_WAKEUP;
+ wakeup(seq_sleeper);
+ }
+ splx(flags);
+ }
+ return TIMER_ARMED;
+ }
+ break;
+
+ case TMR_START:
+ seq_time = get_time();
+ prev_input_time = 0;
+ prev_event_time = 0;
+ break;
+
+ case TMR_STOP:
+ break;
+
+ case TMR_CONTINUE:
+ break;
+
+ case TMR_TEMPO:
+ break;
+
+ case TMR_ECHO:
+ if (seq_mode == SEQ_2)
+ seq_copy_to_input(event, 8);
+ else {
+ parm = (parm << 8 | SEQ_ECHO);
+ seq_copy_to_input((u_char *) &parm, 4);
+ }
+ break;
+
+ default:;
+ }
+
+ return TIMER_NOT_ARMED;
+}
+
+static void
+seq_local_event(u_char *event)
+{
+ u_char cmd = event[1];
+ u_int parm = *((u_int *) &event[4]);
+
+ switch (cmd) {
+ case LOCL_STARTAUDIO:
+#ifdef CONFIG_AUDIO
+ DMAbuf_start_devices(parm);
+#endif
+ break;
+
+ default:;
+ }
+}
+
+static void
+seq_sysex_message(u_char *event)
+{
+ int dev = event[1];
+ int i, l = 0;
+ u_char *buf = &event[2];
+
+ if ((int) dev > max_synthdev)
+ return;
+ if (!(synth_open_mask & (1 << dev)))
+ return;
+ if (!synth_devs[dev])
+ return;
+ if (!synth_devs[dev]->send_sysex)
+ return;
+
+ l = 0;
+ for (i = 0; i < 6 && buf[i] != 0xff; i++)
+ l = i + 1;
+
+ if (l > 0)
+ synth_devs[dev]->send_sysex(dev, buf, l);
+}
+
+static int
+play_event(u_char *q)
+{
+ /*
+ * NOTE! This routine returns 0 = normal event played. 1 = Timer
+ * armed. Suspend playback until timer callback. 2 = MIDI output
+ * buffer full. Restore queue and suspend until timer
+ */
+ u_long *delay;
+
+ switch (q[0]) {
+ case SEQ_NOTEOFF:
+ if (synth_open_mask & (1 << 0))
+ if (synth_devs[0])
+ synth_devs[0]->kill_note(0, q[1], 255, q[3]);
+ break;
+
+ case SEQ_NOTEON:
+ if (q[4] < 128 || q[4] == 255)
+ if (synth_open_mask & (1 << 0))
+ if (synth_devs[0])
+ synth_devs[0]->start_note(0, q[1], q[2], q[3]);
+ break;
+
+ case SEQ_WAIT:
+ delay = (u_long *) q; /* Bytes 1 to 3 are
+ * containing the * delay in
+ * get_time() */
+ *delay = (*delay >> 8) & 0xffffff;
+
+ if (*delay > 0) {
+ long time;
+
+ seq_playing = 1;
+ time = *delay;
+ prev_event_time = time;
+
+ request_sound_timer(time);
+
+ if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) {
+ u_long flags;
+
+ flags = splhigh();
+ if ((seq_sleep_flag.mode & WK_SLEEP)) {
+ seq_sleep_flag.mode = WK_WAKEUP;
+ wakeup(seq_sleeper);
+ }
+ splx(flags);
+ }
+ /*
+ * The timer is now active and will reinvoke this
+ * function after the timer expires. Return to the
+ * caller now.
+ */
+ return 1;
+ }
+ break;
+
+ case SEQ_PGMCHANGE:
+ if (synth_open_mask & (1 << 0))
+ if (synth_devs[0])
+ synth_devs[0]->set_instr(0, q[1], q[2]);
+ break;
+
+ case SEQ_SYNCTIMER: /* Reset timer */
+ seq_time = get_time();
+ prev_input_time = 0;
+ prev_event_time = 0;
+ break;
+
+ case SEQ_MIDIPUTC: /* Put a midi character */
+ if (midi_opened[q[2]]) {
+ int dev;
+
+ dev = q[2];
+
+ if (!midi_devs[dev]->putc(dev, q[1])) {
+ /*
+ * Output FIFO is full. Wait one timer cycle and try again.
+ */
+
+ seq_playing = 1;
+ request_sound_timer(-1);
+ return 2;
+ } else
+ midi_written[dev] = 1;
+ }
+ break;
+
+ case SEQ_ECHO:
+ seq_copy_to_input(q, 4); /* Echo back to the process */
+ break;
+
+ case SEQ_PRIVATE:
+ if ((int) q[1] < max_synthdev)
+ synth_devs[q[1]]->hw_control(q[1], q);
+ break;
+
+ case SEQ_EXTENDED:
+ extended_event(q);
+ break;
+
+ case EV_CHN_VOICE:
+ seq_chn_voice_event(q);
+ break;
+
+ case EV_CHN_COMMON:
+ seq_chn_common_event(q);
+ break;
+
+ case EV_TIMING:
+ if (seq_timing_event(q) == TIMER_ARMED) {
+ return 1;
+ }
+ break;
+
+ case EV_SEQ_LOCAL:
+ seq_local_event(q);
+ break;
+
+ case EV_SYSEX:
+ seq_sysex_message(q);
+ break;
+
+ default:;
+ }
+
+ return 0;
+}
+
+static void
+seq_startplay(void)
+{
+ u_long flags;
+ int this_one, action;
+
+ while (qlen > 0) {
+
+ flags = splhigh();
+ qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
+ qlen--;
+ splx(flags);
+
+ seq_playing = 1;
+
+ if ((action = play_event(&queue[this_one * EV_SZ]))) {
+ /*
+ * Suspend playback. Next timer routine invokes this routine again
+ */
+ if (action == 2) {
+ qlen++;
+ qhead = this_one;
+ }
+ return;
+ }
+ }
+
+ seq_playing = 0;
+
+ if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) {
+ u_long flags;
+
+ flags = splhigh();
+ if ((seq_sleep_flag.mode & WK_SLEEP)) {
+ seq_sleep_flag.mode = WK_WAKEUP;
+ wakeup(seq_sleeper);
+ }
+ splx(flags);
+ }
+}
+
+static void
+reset_controllers(int dev, u_char *controller, int update_dev)
+{
+
+ int i;
+
+ for (i = 0; i < 128; i++)
+ controller[i] = ctrl_def_values[i];
+}
+
+static void
+setup_mode2(void)
+{
+ int dev;
+
+ max_synthdev = num_synths;
+
+ for (dev = 0; dev < num_midis; dev++)
+ if (midi_devs[dev]->converter != NULL)
+ synth_devs[max_synthdev++] = midi_devs[dev]->converter;
+ for (dev = 0; dev < max_synthdev; dev++) {
+ int chn;
+
+ for (chn = 0; chn < 16; chn++) {
+ synth_devs[dev]->chn_info[chn].pgm_num = 0;
+ reset_controllers(dev,
+ synth_devs[dev]->chn_info[chn].controllers, 0);
+ synth_devs[dev]->chn_info[chn].bender_value = (1<<7); /* Neutral */
+ }
+ }
+
+ max_mididev = 0;
+ seq_mode = SEQ_2;
+}
+
+int
+sequencer_open(int dev, struct fileinfo * file)
+{
+ int retval, mode, i;
+ int level, tmp;
+ u_long flags;
+
+ level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
+
+ dev = dev >> 4;
+ mode = file->mode & O_ACCMODE;
+
+ DEB(printf("sequencer_open(dev=%d)\n", dev));
+
+ if (!sequencer_ok) {
+ printf("Soundcard: Sequencer not initialized\n");
+ return -(ENXIO);
+ }
+ if (dev) { /* Patch manager device */
+ int err;
+
+ printf("Patch manager interface is currently broken. Sorry\n");
+ return -(ENXIO);
+
+ dev--;
+
+ if (dev >= MAX_SYNTH_DEV)
+ return -(ENXIO);
+ if (pmgr_present[dev])
+ return -(EBUSY);
+ if ((err = pmgr_open(dev)) < 0)
+ return err;
+
+ pmgr_present[dev] = 1;
+ return err;
+ }
+ flags = splhigh();
+ if (sequencer_busy) {
+ printf("Sequencer busy\n");
+ splx(flags);
+ return -(EBUSY);
+ }
+ sequencer_busy = 1;
+ splx(flags);
+
+ max_mididev = num_midis;
+ max_synthdev = num_synths;
+ pre_event_timeout = 0;
+ seq_mode = SEQ_1;
+
+ if (pending_timer != -1) {
+ tmr_no = pending_timer;
+ pending_timer = -1;
+ }
+ if (tmr_no == -1) { /* Not selected yet */
+ int i, best;
+
+ best = -1;
+ for (i = 0; i < num_sound_timers; i++)
+ if (sound_timer_devs[i]->priority > best) {
+ tmr_no = i;
+ best = sound_timer_devs[i]->priority;
+ }
+ if (tmr_no == -1) /* Should not be */
+ tmr_no = 0;
+ }
+ tmr = sound_timer_devs[tmr_no];
+
+ if (level == 2) {
+ if (tmr == NULL) {
+ printf("sequencer: No timer for level 2\n");
+ sequencer_busy = 0;
+ return -(ENXIO);
+ }
+ setup_mode2();
+ }
+ if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
+ if (!max_mididev) {
+ printf("Sequencer: No Midi devices. Input not possible\n");
+ sequencer_busy = 0;
+ return -(ENXIO);
+ }
+ if (!max_synthdev && !max_mididev)
+ return -(ENXIO);
+
+ synth_open_mask = 0;
+
+ for (i = 0; i < max_mididev; i++) {
+ midi_opened[i] = 0;
+ midi_written[i] = 0;
+ }
+
+ /*
+ * if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
+ */
+ for (i = 0; i < max_synthdev; i++) /* Open synth devices */
+ if ((tmp = synth_devs[i]->open(i, mode)) < 0) {
+ printf("Sequencer: Warning! Cannot open synth device #%d (%d)\n",
+ i, tmp);
+ if (synth_devs[i]->midi_dev)
+ printf("(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
+ } else {
+ synth_open_mask |= (1 << i);
+ if (synth_devs[i]->midi_dev) /* Is a midi interface */
+ midi_opened[synth_devs[i]->midi_dev] = 1;
+ }
+
+ seq_time = get_time();
+ prev_input_time = 0;
+ prev_event_time = 0;
+
+ if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE)) {
+ /* Initialize midi input devices */
+ for (i = 0; i < max_mididev; i++)
+ if (!midi_opened[i]) {
+ if ((retval = midi_devs[i]->open(i, mode,
+ sequencer_midi_input, sequencer_midi_output)) >= 0)
+ midi_opened[i] = 1;
+ }
+ }
+ if (seq_mode == SEQ_2) {
+ tmr->open(tmr_no, seq_mode);
+ }
+ seq_sleep_flag.aborting = 0;
+ seq_sleep_flag.mode = WK_NONE;
+ midi_sleep_flag.aborting = 0;
+ midi_sleep_flag.mode = WK_NONE;
+ output_treshold = SEQ_MAX_QUEUE / 2;
+
+ for (i = 0; i < num_synths; i++)
+ if (pmgr_present[i])
+ pmgr_inform(i, PM_E_OPENED, 0, 0, 0, 0);
+
+ return 0;
+}
+
+static void
+seq_drain_midi_queues(void)
+{
+ int i, n;
+
+ /*
+ * Give the Midi drivers time to drain their output queues
+ */
+
+ n = 1;
+
+ while (!(seq_sleep_flag.aborting) && n) {
+ n = 0;
+
+ for (i = 0; i < max_mididev; i++)
+ if (midi_opened[i] && midi_written[i])
+ if (midi_devs[i]->buffer_status != NULL)
+ if (midi_devs[i]->buffer_status(i))
+ n++;
+
+ /*
+ * Let's have a delay
+ */
+ if (n) {
+ int chn;
+
+ seq_sleeper = &chn;
+ DO_SLEEP(chn, seq_sleep_flag, hz / 10);
+
+ }
+ }
+}
+
+void
+sequencer_release(int dev, struct fileinfo * file)
+{
+ int i;
+ int mode = file->mode & O_ACCMODE;
+
+ dev = dev >> 4;
+
+ DEB(printf("sequencer_release(dev=%d)\n", dev));
+
+ if (dev) { /* Patch manager device */
+ dev--;
+ pmgr_release(dev);
+ pmgr_present[dev] = 0;
+ return;
+ }
+ /*
+ * Wait until the queue is empty (if we don't have nonblock)
+ */
+
+ if (mode != OPEN_READ && !0)
+ while (!(seq_sleep_flag.aborting) && qlen) {
+ seq_sync();
+ }
+
+ if (mode != OPEN_READ)
+ seq_drain_midi_queues(); /* Ensure the output queues are empty */
+ seq_reset();
+ if (mode != OPEN_READ)
+ seq_drain_midi_queues(); /* Flush the all notes off messages */
+
+ for (i = 0; i < max_synthdev; i++)
+ if (synth_open_mask & (1 << i)) /* Actually opened */
+ if (synth_devs[i]) {
+ synth_devs[i]->close(i);
+
+ if (synth_devs[i]->midi_dev)
+ midi_opened[synth_devs[i]->midi_dev] = 0;
+ }
+ for (i = 0; i < num_synths; i++)
+ if (pmgr_present[i])
+ pmgr_inform(i, PM_E_CLOSED, 0, 0, 0, 0);
+
+ for (i = 0; i < max_mididev; i++)
+ if (midi_opened[i])
+ midi_devs[i]->close(i);
+
+ if (seq_mode == SEQ_2)
+ tmr->close(tmr_no);
+
+ sequencer_busy = 0;
+}
+
+static int
+seq_sync(void)
+{
+ u_long flags;
+
+ if (qlen && !seq_playing && !(seq_sleep_flag.aborting))
+ seq_startplay();
+
+ flags = splhigh();
+ if (qlen && !(seq_sleep_flag.mode & WK_SLEEP)) {
+ int chn;
+
+ seq_sleeper = &chn;
+ DO_SLEEP(chn, seq_sleep_flag, 0);
+
+ }
+ splx(flags);
+
+ return qlen;
+}
+
+static void
+midi_outc(int dev, u_char data)
+{
+ /*
+ * NOTE! Calls sleep(). Don't call this from interrupt.
+ */
+
+ int n;
+ u_long flags;
+
+ /*
+ * This routine sends one byte to the Midi channel. If the output
+ * Fifo is full, it waits until there is space in the queue
+ */
+
+ n = 3 * hz; /* Timeout */
+
+ flags = splhigh();
+ while (n && !midi_devs[dev]->putc(dev, data)) {
+ int chn;
+ seq_sleeper = &chn;
+ DO_SLEEP(chn, seq_sleep_flag, 4);
+
+ n--;
+ }
+ splx(flags);
+}
+
+static void
+seq_reset(void)
+{
+ /*
+ * NOTE! Calls sleep(). Don't call this from interrupt.
+ */
+
+ int i;
+ int chn;
+ u_long flags;
+
+ sound_stop_timer();
+ seq_time = get_time();
+ prev_input_time = 0;
+ prev_event_time = 0;
+
+ qlen = qhead = qtail = 0;
+ iqlen = iqhead = iqtail = 0;
+
+ for (i = 0; i < max_synthdev; i++)
+ if (synth_open_mask & (1 << i))
+ if (synth_devs[i])
+ synth_devs[i]->reset(i);
+
+ if (seq_mode == SEQ_2) {
+ for (chn = 0; chn < 16; chn++)
+ for (i = 0; i < max_synthdev; i++)
+ if ( (synth_open_mask & (1 << i)) && (synth_devs[i]) ) {
+ synth_devs[i]->controller(i, chn,123,0);/* All notes off */
+ synth_devs[i]->controller(i, chn,121,0);/* Reset all ctl */
+ synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
+ }
+
+ } else { /* seq_mode == SEQ_1 */
+ for (i = 0; i < max_mididev; i++)
+ if (midi_written[i]) {
+ /* Midi used. Some notes may still be playing */
+ /*
+ * Sending just a ACTIVE SENSING message
+ * should be enough to stop all playing
+ * notes. Since there are devices not
+ * recognizing the active sensing, we have to
+ * send some all notes off messages also.
+ */
+ midi_outc(i, 0xfe);
+
+ for (chn = 0; chn < 16; chn++) {
+ midi_outc(i, (u_char) (0xb0 + (chn & 0x0f))); /* control change */
+ midi_outc(i, 0x7b); /* All notes off */
+ midi_outc(i, 0); /* Dummy parameter */
+ }
+
+ midi_devs[i]->close(i);
+
+ midi_written[i] = 0;
+ midi_opened[i] = 0;
+ }
+ }
+
+ seq_playing = 0;
+
+ flags = splhigh();
+ if ((seq_sleep_flag.mode & WK_SLEEP)) {
+ seq_sleep_flag.mode = WK_WAKEUP;
+ wakeup(seq_sleeper);
+ }
+ splx(flags);
+
+}
+
+static void
+seq_panic(void)
+{
+ /*
+ * This routine is called by the application in case the user wants
+ * to reset the system to the default state.
+ */
+
+ seq_reset();
+
+ /*
+ * Since some of the devices don't recognize the active sensing and
+ * all notes off messages, we have to shut all notes manually.
+ *
+ * TO BE IMPLEMENTED LATER
+ */
+
+ /*
+ * Also return the controllers to their default states
+ */
+}
+
+int
+sequencer_ioctl(int dev, struct fileinfo * file,
+ u_int cmd, ioctl_arg arg)
+{
+ int midi_dev, orig_dev;
+ int mode = file->mode & O_ACCMODE;
+
+ orig_dev = dev = dev >> 4;
+
+ switch (cmd) {
+ case SNDCTL_TMR_TIMEBASE:
+ case SNDCTL_TMR_TEMPO:
+ case SNDCTL_TMR_START:
+ case SNDCTL_TMR_STOP:
+ case SNDCTL_TMR_CONTINUE:
+ case SNDCTL_TMR_METRONOME:
+ case SNDCTL_TMR_SOURCE:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ if (seq_mode != SEQ_2)
+ return -(EINVAL);
+ return tmr->ioctl(tmr_no, cmd, arg);
+ break;
+
+ case SNDCTL_TMR_SELECT:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ if (seq_mode != SEQ_2)
+ return -(EINVAL);
+ pending_timer = (*(int *) arg);
+
+ if (pending_timer < 0 || pending_timer >= num_sound_timers) {
+ pending_timer = -1;
+ return -(EINVAL);
+ }
+ return *(int *) arg = pending_timer;
+ break;
+
+ case SNDCTL_SEQ_PANIC:
+ seq_panic();
+ break;
+
+ case SNDCTL_SEQ_SYNC:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ if (mode == OPEN_READ)
+ return 0;
+ while (qlen && !(seq_sleep_flag.aborting))
+ seq_sync();
+ if (qlen)
+ return -(EINTR);
+ else
+ return 0;
+ break;
+
+ case SNDCTL_SEQ_RESET:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ seq_reset();
+ return 0;
+ break;
+
+ case SNDCTL_SEQ_TESTMIDI:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ midi_dev = (*(int *) arg);
+ if (midi_dev >= max_mididev)
+ return -(ENXIO);
+
+ if (!midi_opened[midi_dev]) {
+ int err, mode;
+
+ mode = file->mode & O_ACCMODE;
+ if ((err = midi_devs[midi_dev]->open(midi_dev, mode,
+ sequencer_midi_input, sequencer_midi_output)) < 0)
+ return err;
+ }
+ midi_opened[midi_dev] = 1;
+
+ return 0;
+ break;
+
+ case SNDCTL_SEQ_GETINCOUNT:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ if (mode == OPEN_WRITE)
+ return 0;
+ return *(int *) arg = iqlen;
+ break;
+
+ case SNDCTL_SEQ_GETOUTCOUNT:
+
+ if (mode == OPEN_READ)
+ return 0;
+ return *(int *) arg = SEQ_MAX_QUEUE - qlen;
+ break;
+
+ case SNDCTL_SEQ_CTRLRATE:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ /*
+ * If *arg == 0, just return the current rate
+ */
+ if (seq_mode == SEQ_2)
+ return tmr->ioctl(tmr_no, cmd, arg);
+
+ if ((*(int *) arg) != 0)
+ return -(EINVAL);
+
+ return *(int *) arg = hz;
+ break;
+
+ case SNDCTL_SEQ_RESETSAMPLES:
+ {
+ int err;
+
+ dev = (*(int *) arg);
+ if (dev < 0 || dev >= num_synths)
+ return -(ENXIO);
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -(EBUSY);
+ if (!orig_dev && pmgr_present[dev])
+ pmgr_inform(dev, PM_E_PATCH_RESET, 0, 0, 0, 0);
+
+ err = synth_devs[dev]->ioctl(dev, cmd, arg);
+ return err;
+ }
+ break;
+
+ case SNDCTL_SEQ_NRSYNTHS:
+ return *(int *) arg = max_synthdev;
+ break;
+
+ case SNDCTL_SEQ_NRMIDIS:
+ return *(int *) arg = max_mididev;
+ break;
+
+ case SNDCTL_SYNTH_MEMAVL:
+ {
+ int dev = (*(int *) arg);
+
+ if (dev < 0 || dev >= num_synths)
+ return -(ENXIO);
+
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -(EBUSY);
+
+ return *(int *) arg = synth_devs[dev]->ioctl(dev, cmd, arg);
+ }
+ break;
+
+ case SNDCTL_FM_4OP_ENABLE:
+ {
+ int dev = (*(int *) arg);
+
+ if (dev < 0 || dev >= num_synths)
+ return -(ENXIO);
+
+ if (!(synth_open_mask & (1 << dev)))
+ return -(ENXIO);
+
+ synth_devs[dev]->ioctl(dev, cmd, arg);
+ return 0;
+ }
+ break;
+
+ case SNDCTL_SYNTH_INFO:
+ {
+ struct synth_info inf;
+ int dev;
+
+ bcopy(&(((char *) arg)[0]), (char *) &inf, sizeof(inf));
+ dev = inf.device;
+
+ if (dev < 0 || dev >= max_synthdev)
+ return -(ENXIO);
+
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -(EBUSY);
+
+ return synth_devs[dev]->ioctl(dev, cmd, arg);
+ }
+ break;
+
+ case SNDCTL_SEQ_OUTOFBAND:
+ {
+ struct seq_event_rec event;
+ u_long flags;
+
+ bcopy(&(((char *) arg)[0]), (char *) &event, sizeof(event));
+
+ flags = splhigh();
+ play_event(event.arr);
+ splx(flags);
+
+ return 0;
+ }
+ break;
+
+ case SNDCTL_MIDI_INFO:
+ {
+ struct midi_info inf;
+ int dev;
+
+ bcopy(&(((char *) arg)[0]), (char *) &inf, sizeof(inf));
+ dev = inf.device;
+
+ if (dev < 0 || dev >= max_mididev)
+ return -(ENXIO);
+
+ bcopy((char *) &(midi_devs[dev]->info), &(((char *) arg)[0]), sizeof(inf));
+ return 0;
+ }
+ break;
+
+ case SNDCTL_PMGR_IFACE:
+ {
+ struct patmgr_info *inf;
+ int dev, err;
+
+ if ((inf = (struct patmgr_info *) malloc(sizeof(*inf), M_TEMP, M_WAITOK)) == NULL) {
+ printf("patmgr: Can't allocate memory for a message\n");
+ return -(EIO);
+ }
+ bcopy(&(((char *) arg)[0]), (char *) inf, sizeof(*inf));
+ dev = inf->device;
+
+ if (dev < 0 || dev >= num_synths) {
+ free(inf, M_TEMP);
+ return -(ENXIO);
+ }
+ if (!synth_devs[dev]->pmgr_interface) {
+ free(inf, M_TEMP);
+ return -(ENXIO);
+ }
+ if ((err = synth_devs[dev]->pmgr_interface(dev, inf)) == -1) {
+ free(inf, M_TEMP);
+ return err;
+ }
+ bcopy((char *) inf, &(((char *) arg)[0]), sizeof(*inf));
+ free(inf, M_TEMP);
+ return 0;
+ }
+ break;
+
+ case SNDCTL_PMGR_ACCESS:
+ {
+ struct patmgr_info *inf;
+ int dev, err;
+
+ if ((inf = (struct patmgr_info *) malloc(sizeof(*inf), M_TEMP, M_WAITOK)) == NULL) {
+ printf("patmgr: Can't allocate memory for a message\n");
+ return -(EIO);
+ }
+ bcopy(&(((char *) arg)[0]), (char *) inf, sizeof(*inf));
+ dev = inf->device;
+
+ if (dev < 0 || dev >= num_synths) {
+ free(inf, M_TEMP);
+ return -(ENXIO);
+ }
+ if (!pmgr_present[dev]) {
+ free(inf, M_TEMP);
+ return -(ESRCH);
+ }
+ if ((err = pmgr_access(dev, inf)) < 0) {
+ free(inf, M_TEMP);
+ return err;
+ }
+ bcopy((char *) inf, &(((char *) arg)[0]), sizeof(*inf));
+ free(inf, M_TEMP);
+ return 0;
+ }
+ break;
+
+ case SNDCTL_SEQ_THRESHOLD:
+ {
+ int tmp = (*(int *) arg);
+
+ if (dev)/* Patch manager */
+ return -(EIO);
+
+ if (tmp < 1)
+ tmp = 1;
+ if (tmp >= SEQ_MAX_QUEUE)
+ tmp = SEQ_MAX_QUEUE - 1;
+ output_treshold = tmp;
+ return 0;
+ }
+ break;
+
+ case SNDCTL_MIDI_PRETIME:
+ {
+ int val = (*(int *) arg);
+
+ if (val < 0)
+ val = 0;
+
+ val = (hz * val) / 10;
+ pre_event_timeout = val;
+ return *(int *) arg = val;
+ }
+ break;
+
+ default:
+ if (dev) /* Patch manager */
+ return -(EIO);
+
+ if (mode == OPEN_READ)
+ return -(EIO);
+
+ if (!synth_devs[0])
+ return -(ENXIO);
+ if (!(synth_open_mask & (1 << 0)))
+ return -(ENXIO);
+ return synth_devs[0]->ioctl(0, cmd, arg);
+ break;
+ }
+
+ return -(EINVAL);
+}
+
+#ifdef ALLOW_POLL
+int
+sequencer_poll (int dev, struct fileinfo *file, int events, select_table * wait)
+{
+ unsigned long flags;
+ int revents = 0;
+
+ dev = dev >> 4;
+ flags = splhigh();
+
+
+ if (events & (POLLIN | POLLRDNORM))
+ if (!iqlen)
+ selrecord(wait, &selinfo[dev]);
+ else {
+ revents |= events & (POLLIN | POLLRDNORM);
+ midi_sleep_flag.mode &= ~WK_SLEEP;
+ }
+
+ if (events & (POLLOUT | POLLWRNORM))
+ if (qlen >= SEQ_MAX_QUEUE)
+ selrecord(wait, &selinfo[dev]);
+ else {
+ revents |= events & (POLLOUT | POLLWRNORM);
+ seq_sleep_flag.mode &= ~WK_SLEEP;
+ }
+
+ splx(flags);
+
+ return (revents);
+}
+
+#endif
+
+
+void
+sequencer_timer(void *dummy)
+{
+ seq_startplay();
+}
+
+int
+note_to_freq(int note_num)
+{
+
+ /*
+ * This routine converts a midi note to a frequency (multiplied by
+ * 1000)
+ */
+
+ int note, octave, note_freq;
+ int notes[] =
+ {
+ 261632, 277189, 293671, 311132, 329632, 349232,
+ 369998, 391998, 415306, 440000, 466162, 493880
+ };
+
+#define BASE_OCTAVE 5
+
+ octave = note_num / 12;
+ note = note_num % 12;
+
+ note_freq = notes[note];
+
+ if (octave < BASE_OCTAVE)
+ note_freq >>= (BASE_OCTAVE - octave);
+ else if (octave > BASE_OCTAVE)
+ note_freq <<= (octave - BASE_OCTAVE);
+
+ /*
+ * note_freq >>= 1;
+ */
+
+ return note_freq;
+}
+
+u_long
+compute_finetune(u_long base_freq, int bend, int range)
+{
+ u_long amount;
+ int negative, semitones, cents, multiplier = 1;
+
+ if (!bend)
+ return base_freq;
+ if (!range)
+ return base_freq;
+
+ if (!base_freq)
+ return base_freq;
+
+ if (range >= 8192)
+ range = 8192;
+
+ bend = bend * range / 8192;
+ if (!bend)
+ return base_freq;
+
+ negative = bend < 0 ? 1 : 0;
+
+ if (bend < 0)
+ bend *= -1;
+ if (bend > range)
+ bend = range;
+
+ /*
+ * if (bend > 2399) bend = 2399;
+ */
+ while (bend > 2399) {
+ multiplier *= 4;
+ bend -= 2400;
+ }
+
+ semitones = bend / 100;
+ cents = bend % 100;
+
+ amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents])
+ / 10000;
+
+ if (negative)
+ return (base_freq * 10000) / amount; /* Bend down */
+ else
+ return (base_freq * amount) / 10000; /* Bend up */
+}
+
+
+void
+sequencer_init()
+{
+
+ sequencer_ok = 1;
+
+ queue = (u_char *) malloc(SEQ_MAX_QUEUE * EV_SZ, M_DEVBUF, M_NOWAIT);
+ if (!queue)
+ panic("SOUND: Cannot allocate memory\n");
+
+ iqueue = (u_char *) malloc(SEQ_MAX_QUEUE * IEV_SZ, M_DEVBUF, M_NOWAIT);
+ if (!iqueue)
+ panic("SOUND: Cannot allocate memory\n");
+}
+
+#endif
+#endif
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