summaryrefslogtreecommitdiff
path: root/sound/oss/sequencer.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/oss/sequencer.c')
-rw-r--r--sound/oss/sequencer.c1661
1 files changed, 1661 insertions, 0 deletions
diff --git a/sound/oss/sequencer.c b/sound/oss/sequencer.c
new file mode 100644
index 000000000..f19da4b47
--- /dev/null
+++ b/sound/oss/sequencer.c
@@ -0,0 +1,1661 @@
+/*
+ * sound/oss/sequencer.c
+ *
+ * The sequencer personality manager.
+ */
+/*
+ * Copyright (C) by Hannu Savolainen 1993-1997
+ *
+ * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
+ * Version 2 (June 1991). See the "COPYING" file distributed with this software
+ * for more info.
+ */
+/*
+ * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
+ * Alan Cox : reformatted and fixed a pair of null pointer bugs
+ */
+#include <linux/kmod.h>
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+#include "midi_ctrl.h"
+#include "sleep.h"
+
+static int sequencer_ok;
+static struct sound_timer_operations *tmr;
+static int tmr_no = -1; /* Currently selected timer */
+static int pending_timer = -1; /* For timer change operation */
+extern unsigned long seq_time;
+
+static int obsolete_api_used;
+static DEFINE_SPINLOCK(lock);
+
+/*
+ * Local counts for number of synth and MIDI devices. These are initialized
+ * by the sequencer_open.
+ */
+static int max_mididev;
+static int max_synthdev;
+
+/*
+ * The seq_mode gives the operating mode of the sequencer:
+ * 1 = level1 (the default)
+ * 2 = level2 (extended capabilities)
+ */
+
+#define SEQ_1 1
+#define SEQ_2 2
+static int seq_mode = SEQ_1;
+
+static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
+static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
+
+static int midi_opened[MAX_MIDI_DEV];
+
+static int midi_written[MAX_MIDI_DEV];
+
+static unsigned long prev_input_time;
+static int prev_event_time;
+
+#include "tuning.h"
+
+#define EV_SZ 8
+#define IEV_SZ 8
+
+static unsigned char *queue;
+static unsigned char *iqueue;
+
+static volatile int qhead, qtail, qlen;
+static volatile int iqhead, iqtail, iqlen;
+static volatile int seq_playing;
+static volatile int sequencer_busy;
+static int output_threshold;
+static long pre_event_timeout;
+static unsigned synth_open_mask;
+
+static int seq_queue(unsigned char *note, char nonblock);
+static void seq_startplay(void);
+static int seq_sync(void);
+static void seq_reset(void);
+
+#if MAX_SYNTH_DEV > 15
+#error Too many synthesizer devices enabled.
+#endif
+
+int sequencer_read(int dev, struct file *file, char __user *buf, int count)
+{
+ int c = count, p = 0;
+ int ev_len;
+ unsigned long flags;
+
+ dev = dev >> 4;
+
+ ev_len = seq_mode == SEQ_1 ? 4 : 8;
+
+ spin_lock_irqsave(&lock,flags);
+
+ if (!iqlen)
+ {
+ spin_unlock_irqrestore(&lock,flags);
+ if (file->f_flags & O_NONBLOCK) {
+ return -EAGAIN;
+ }
+
+ oss_broken_sleep_on(&midi_sleeper, pre_event_timeout);
+ spin_lock_irqsave(&lock,flags);
+ if (!iqlen)
+ {
+ spin_unlock_irqrestore(&lock,flags);
+ return 0;
+ }
+ }
+ while (iqlen && c >= ev_len)
+ {
+ char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
+ spin_unlock_irqrestore(&lock,flags);
+ if (copy_to_user(&(buf)[p], fixit, ev_len))
+ return count - c;
+ p += ev_len;
+ c -= ev_len;
+
+ spin_lock_irqsave(&lock,flags);
+ iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
+ iqlen--;
+ }
+ spin_unlock_irqrestore(&lock,flags);
+ return count - c;
+}
+
+static void sequencer_midi_output(int dev)
+{
+ /*
+ * Currently NOP
+ */
+}
+
+void seq_copy_to_input(unsigned char *event_rec, int len)
+{
+ unsigned 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 */
+
+ spin_lock_irqsave(&lock,flags);
+ memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
+ iqlen++;
+ iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
+ wake_up(&midi_sleeper);
+ spin_unlock_irqrestore(&lock,flags);
+}
+EXPORT_SYMBOL(seq_copy_to_input);
+
+static void sequencer_midi_input(int dev, unsigned char data)
+{
+ unsigned int tstamp;
+ unsigned char event_rec[4];
+
+ if (data == 0xfe) /* Ignore active sensing */
+ return;
+
+ tstamp = jiffies - seq_time;
+
+ if (tstamp != prev_input_time)
+ {
+ tstamp = (tstamp << 8) | SEQ_WAIT;
+ seq_copy_to_input((unsigned char *) &tstamp, 4);
+ prev_input_time = tstamp;
+ }
+ event_rec[0] = SEQ_MIDIPUTC;
+ event_rec[1] = data;
+ event_rec[2] = dev;
+ event_rec[3] = 0;
+
+ seq_copy_to_input(event_rec, 4);
+}
+
+void seq_input_event(unsigned char *event_rec, int len)
+{
+ unsigned long this_time;
+
+ if (seq_mode == SEQ_2)
+ this_time = tmr->get_time(tmr_no);
+ else
+ this_time = jiffies - seq_time;
+
+ if (this_time != prev_input_time)
+ {
+ unsigned char tmp_event[8];
+
+ tmp_event[0] = EV_TIMING;
+ tmp_event[1] = TMR_WAIT_ABS;
+ tmp_event[2] = 0;
+ tmp_event[3] = 0;
+ *(unsigned int *) &tmp_event[4] = this_time;
+
+ seq_copy_to_input(tmp_event, 8);
+ prev_input_time = this_time;
+ }
+ seq_copy_to_input(event_rec, len);
+}
+EXPORT_SYMBOL(seq_input_event);
+
+int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
+{
+ unsigned char event_rec[EV_SZ], ev_code;
+ int p = 0, c, ev_size;
+ int mode = translate_mode(file);
+
+ dev = dev >> 4;
+
+ if (mode == OPEN_READ)
+ return -EIO;
+
+ c = count;
+
+ while (c >= 4)
+ {
+ if (copy_from_user((char *) event_rec, &(buf)[p], 4))
+ goto out;
+ ev_code = event_rec[0];
+
+ if (ev_code == SEQ_FULLSIZE)
+ {
+ int err, fmt;
+
+ dev = *(unsigned short *) &event_rec[2];
+ if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
+ return -ENXIO;
+
+ if (!(synth_open_mask & (1 << dev)))
+ return -ENXIO;
+
+ fmt = (*(short *) &event_rec[0]) & 0xffff;
+ err = synth_devs[dev]->load_patch(dev, fmt, buf + p, c, 0);
+ if (err < 0)
+ return err;
+
+ return err;
+ }
+ if (ev_code >= 128)
+ {
+ if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
+ {
+ printk(KERN_WARNING "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 (copy_from_user((char *)&event_rec[4],
+ &(buf)[p + 4], 4))
+ goto out;
+
+ }
+ else
+ {
+ if (seq_mode == SEQ_2)
+ {
+ printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
+ return -EINVAL;
+ }
+ ev_size = 4;
+
+ if (event_rec[0] != SEQ_MIDIPUTC)
+ obsolete_api_used = 1;
+ }
+
+ if (event_rec[0] == SEQ_MIDIPUTC)
+ {
+ if (!midi_opened[event_rec[2]])
+ {
+ int err, mode;
+ int dev = event_rec[2];
+
+ if (dev >= max_mididev || midi_devs[dev]==NULL)
+ {
+ /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
+ return -ENXIO;
+ }
+ mode = translate_mode(file);
+
+ if ((err = midi_devs[dev]->open(dev, mode,
+ sequencer_midi_input, sequencer_midi_output)) < 0)
+ {
+ seq_reset();
+ printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
+ return err;
+ }
+ midi_opened[dev] = 1;
+ }
+ }
+ if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
+ {
+ int processed = count - c;
+
+ if (!seq_playing)
+ seq_startplay();
+
+ if (!processed && (file->f_flags & O_NONBLOCK))
+ return -EAGAIN;
+ else
+ return processed;
+ }
+ p += ev_size;
+ c -= ev_size;
+ }
+
+ if (!seq_playing)
+ seq_startplay();
+out:
+ return count;
+}
+
+static int seq_queue(unsigned 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 && !waitqueue_active(&seq_sleeper)) {
+ /*
+ * Sleep until there is enough space on the queue
+ */
+ oss_broken_sleep_on(&seq_sleeper, MAX_SCHEDULE_TIMEOUT);
+ }
+ if (qlen >= SEQ_MAX_QUEUE)
+ {
+ return 0; /*
+ * To be sure
+ */
+ }
+ memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
+
+ qtail = (qtail + 1) % SEQ_MAX_QUEUE;
+ qlen++;
+
+ return 1;
+}
+
+static int extended_event(unsigned 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;
+
+ if (q[5] == 0)
+ {
+ synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
+ break;
+ }
+ 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] | (q[6] << 8)));
+ 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)
+{
+ unsigned 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)
+{
+ unsigned 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(unsigned char *event_rec)
+{
+#define dev event_rec[1]
+#define cmd event_rec[2]
+#define chn event_rec[3]
+#define note event_rec[4]
+#define parm event_rec[5]
+
+ int voice = -1;
+
+ if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
+ 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);
+ synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
+ }
+ 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:;
+ }
+#undef dev
+#undef cmd
+#undef chn
+#undef note
+#undef parm
+}
+
+
+static void seq_chn_common_event(unsigned char *event_rec)
+{
+ unsigned char dev = event_rec[1];
+ unsigned char cmd = event_rec[2];
+ unsigned char chn = event_rec[3];
+ unsigned char p1 = event_rec[4];
+
+ /* unsigned char p2 = event_rec[5]; */
+ unsigned short w14 = *(short *) &event_rec[6];
+
+ if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
+ return;
+ if (!(synth_open_mask & (1 << dev)))
+ return;
+ if (!synth_devs[dev])
+ return;
+
+ switch (cmd)
+ {
+ case MIDI_PGM_CHANGE:
+ if (seq_mode == SEQ_2)
+ {
+ if (chn > 15)
+ break;
+
+ 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)
+ {
+ if (chn > 15)
+ break;
+
+ 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(unsigned char *event_rec)
+{
+ unsigned char cmd = event_rec[1];
+ unsigned int parm = *(int *) &event_rec[4];
+
+ if (seq_mode == SEQ_2)
+ {
+ int ret;
+
+ if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
+ if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+ wake_up(&seq_sleeper);
+ 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;
+
+ time = parm;
+ prev_event_time = time;
+
+ seq_playing = 1;
+ request_sound_timer(time);
+
+ if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+ wake_up(&seq_sleeper);
+ return TIMER_ARMED;
+ }
+ break;
+
+ case TMR_START:
+ seq_time = jiffies;
+ prev_input_time = 0;
+ prev_event_time = 0;
+ break;
+
+ case TMR_STOP:
+ break;
+
+ case TMR_CONTINUE:
+ break;
+
+ case TMR_TEMPO:
+ break;
+
+ case TMR_ECHO:
+ parm = (parm << 8 | SEQ_ECHO);
+ seq_copy_to_input((unsigned char *) &parm, 4);
+ break;
+
+ default:;
+ }
+
+ return TIMER_NOT_ARMED;
+}
+
+static void seq_local_event(unsigned char *event_rec)
+{
+ unsigned char cmd = event_rec[1];
+ unsigned int parm = *((unsigned int *) &event_rec[4]);
+
+ switch (cmd)
+ {
+ case LOCL_STARTAUDIO:
+ DMAbuf_start_devices(parm);
+ break;
+
+ default:;
+ }
+}
+
+static void seq_sysex_message(unsigned char *event_rec)
+{
+ unsigned int dev = event_rec[1];
+ int i, l = 0;
+ unsigned char *buf = &event_rec[2];
+
+ if (dev > max_synthdev)
+ return;
+ if (!(synth_open_mask & (1 << dev)))
+ return;
+ if (!synth_devs[dev])
+ return;
+
+ l = 0;
+ for (i = 0; i < 6 && buf[i] != 0xff; i++)
+ l = i + 1;
+
+ if (!synth_devs[dev]->send_sysex)
+ return;
+ if (l > 0)
+ synth_devs[dev]->send_sysex(dev, buf, l);
+}
+
+static int play_event(unsigned 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
+ */
+ unsigned int *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 = (unsigned int *) q; /*
+ * Bytes 1 to 3 are containing the *
+ * delay in 'ticks'
+ */
+ *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_threshold)
+ wake_up(&seq_sleeper);
+ /*
+ * 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 = jiffies;
+ 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 (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
+ break;
+
+ if (!midi_devs[dev]->outputc(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;
+}
+
+/* called also as timer in irq context */
+static void seq_startplay(void)
+{
+ int this_one, action;
+ unsigned long flags;
+
+ while (qlen > 0)
+ {
+
+ spin_lock_irqsave(&lock,flags);
+ qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
+ qlen--;
+ spin_unlock_irqrestore(&lock,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_threshold)
+ wake_up(&seq_sleeper);
+}
+
+static void reset_controllers(int dev, unsigned 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] && midi_devs[dev]->converter != NULL)
+ {
+ synth_devs[max_synthdev++] = midi_devs[dev]->converter;
+ }
+ }
+
+ for (dev = 0; dev < max_synthdev; dev++)
+ {
+ int chn;
+
+ synth_devs[dev]->sysex_ptr = 0;
+ synth_devs[dev]->emulation = 0;
+
+ 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 */
+ synth_devs[dev]->chn_info[chn].bender_range = 200;
+ }
+ }
+ max_mididev = 0;
+ seq_mode = SEQ_2;
+}
+
+int sequencer_open(int dev, struct file *file)
+{
+ int retval, mode, i;
+ int level, tmp;
+
+ if (!sequencer_ok)
+ sequencer_init();
+
+ level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
+
+ dev = dev >> 4;
+ mode = translate_mode(file);
+
+ if (!sequencer_ok)
+ {
+/* printk("Sound card: sequencer not initialized\n");*/
+ return -ENXIO;
+ }
+ if (dev) /* Patch manager device (obsolete) */
+ return -ENXIO;
+
+ if(synth_devs[dev] == NULL)
+ request_module("synth0");
+
+ if (mode == OPEN_READ)
+ {
+ if (!num_midis)
+ {
+ /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
+ sequencer_busy = 0;
+ return -ENXIO;
+ }
+ }
+ if (sequencer_busy)
+ {
+ return -EBUSY;
+ }
+ sequencer_busy = 1;
+ obsolete_api_used = 0;
+
+ max_mididev = num_midis;
+ max_synthdev = num_synths;
+ pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
+ 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] && 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)
+ {
+ /*printk("sequencer: No timer for level 2\n");*/
+ sequencer_busy = 0;
+ return -ENXIO;
+ }
+ setup_mode2();
+ }
+ if (!max_synthdev && !max_mididev)
+ {
+ sequencer_busy=0;
+ return -ENXIO;
+ }
+
+ synth_open_mask = 0;
+
+ for (i = 0; i < max_mididev; i++)
+ {
+ midi_opened[i] = 0;
+ midi_written[i] = 0;
+ }
+
+ for (i = 0; i < max_synthdev; i++)
+ {
+ if (synth_devs[i]==NULL)
+ continue;
+
+ if (!try_module_get(synth_devs[i]->owner))
+ continue;
+
+ if ((tmp = synth_devs[i]->open(i, mode)) < 0)
+ {
+ printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
+ if (synth_devs[i]->midi_dev)
+ printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
+ }
+ else
+ {
+ synth_open_mask |= (1 << i);
+ if (synth_devs[i]->midi_dev)
+ midi_opened[synth_devs[i]->midi_dev] = 1;
+ }
+ }
+
+ seq_time = jiffies;
+
+ 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] && midi_devs[i])
+ {
+ if (!try_module_get(midi_devs[i]->owner))
+ continue;
+
+ if ((retval = midi_devs[i]->open(i, mode,
+ sequencer_midi_input, sequencer_midi_output)) >= 0)
+ {
+ midi_opened[i] = 1;
+ }
+ }
+ }
+
+ if (seq_mode == SEQ_2) {
+ if (try_module_get(tmr->owner))
+ tmr->open(tmr_no, seq_mode);
+ }
+
+ init_waitqueue_head(&seq_sleeper);
+ init_waitqueue_head(&midi_sleeper);
+ output_threshold = SEQ_MAX_QUEUE / 2;
+
+ 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 (!signal_pending(current) && 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)
+ oss_broken_sleep_on(&seq_sleeper, HZ/10);
+ }
+}
+
+void sequencer_release(int dev, struct file *file)
+{
+ int i;
+ int mode = translate_mode(file);
+
+ dev = dev >> 4;
+
+ /*
+ * Wait until the queue is empty (if we don't have nonblock)
+ */
+
+ if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
+ {
+ while (!signal_pending(current) && qlen > 0)
+ {
+ seq_sync();
+ oss_broken_sleep_on(&seq_sleeper, 3*HZ);
+ /* Extra delay */
+ }
+ }
+
+ 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);
+
+ module_put(synth_devs[i]->owner);
+
+ if (synth_devs[i]->midi_dev)
+ midi_opened[synth_devs[i]->midi_dev] = 0;
+ }
+ }
+
+ for (i = 0; i < max_mididev; i++)
+ {
+ if (midi_opened[i]) {
+ midi_devs[i]->close(i);
+ module_put(midi_devs[i]->owner);
+ }
+ }
+
+ if (seq_mode == SEQ_2) {
+ tmr->close(tmr_no);
+ module_put(tmr->owner);
+ }
+
+ if (obsolete_api_used)
+ printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
+ sequencer_busy = 0;
+}
+
+static int seq_sync(void)
+{
+ if (qlen && !seq_playing && !signal_pending(current))
+ seq_startplay();
+
+ if (qlen > 0)
+ oss_broken_sleep_on(&seq_sleeper, HZ);
+ return qlen;
+}
+
+static void midi_outc(int dev, unsigned char data)
+{
+ /*
+ * NOTE! Calls sleep(). Don't call this from interrupt.
+ */
+
+ int n;
+ unsigned 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 */
+
+ spin_lock_irqsave(&lock,flags);
+ while (n && !midi_devs[dev]->outputc(dev, data)) {
+ oss_broken_sleep_on(&seq_sleeper, HZ/25);
+ n--;
+ }
+ spin_unlock_irqrestore(&lock,flags);
+}
+
+static void seq_reset(void)
+{
+ /*
+ * NOTE! Calls sleep(). Don't call this from interrupt.
+ */
+
+ int i;
+ int chn;
+ unsigned long flags;
+
+ sound_stop_timer();
+
+ seq_time = jiffies;
+ 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))
+ if (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, (unsigned 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;
+
+ spin_lock_irqsave(&lock,flags);
+
+ if (waitqueue_active(&seq_sleeper)) {
+ /* printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
+ wake_up(&seq_sleeper);
+ }
+ spin_unlock_irqrestore(&lock,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 file *file, unsigned int cmd, void __user *arg)
+{
+ int midi_dev, orig_dev, val, err;
+ int mode = translate_mode(file);
+ struct synth_info inf;
+ struct seq_event_rec event_rec;
+ int __user *p = arg;
+
+ 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 (seq_mode != SEQ_2)
+ return -EINVAL;
+ return tmr->ioctl(tmr_no, cmd, arg);
+
+ case SNDCTL_TMR_SELECT:
+ if (seq_mode != SEQ_2)
+ return -EINVAL;
+ if (get_user(pending_timer, p))
+ return -EFAULT;
+ if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
+ {
+ pending_timer = -1;
+ return -EINVAL;
+ }
+ val = pending_timer;
+ break;
+
+ case SNDCTL_SEQ_PANIC:
+ seq_panic();
+ return -EINVAL;
+
+ case SNDCTL_SEQ_SYNC:
+ if (mode == OPEN_READ)
+ return 0;
+ while (qlen > 0 && !signal_pending(current))
+ seq_sync();
+ return qlen ? -EINTR : 0;
+
+ case SNDCTL_SEQ_RESET:
+ seq_reset();
+ return 0;
+
+ case SNDCTL_SEQ_TESTMIDI:
+ if (__get_user(midi_dev, p))
+ return -EFAULT;
+ if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
+ return -ENXIO;
+
+ if (!midi_opened[midi_dev] &&
+ (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;
+
+ case SNDCTL_SEQ_GETINCOUNT:
+ if (mode == OPEN_WRITE)
+ return 0;
+ val = iqlen;
+ break;
+
+ case SNDCTL_SEQ_GETOUTCOUNT:
+ if (mode == OPEN_READ)
+ return 0;
+ val = SEQ_MAX_QUEUE - qlen;
+ break;
+
+ case SNDCTL_SEQ_GETTIME:
+ if (seq_mode == SEQ_2)
+ return tmr->ioctl(tmr_no, cmd, arg);
+ val = jiffies - seq_time;
+ break;
+
+ case SNDCTL_SEQ_CTRLRATE:
+ /*
+ * If *arg == 0, just return the current rate
+ */
+ if (seq_mode == SEQ_2)
+ return tmr->ioctl(tmr_no, cmd, arg);
+
+ if (get_user(val, p))
+ return -EFAULT;
+ if (val != 0)
+ return -EINVAL;
+ val = HZ;
+ break;
+
+ case SNDCTL_SEQ_RESETSAMPLES:
+ case SNDCTL_SYNTH_REMOVESAMPLE:
+ case SNDCTL_SYNTH_CONTROL:
+ if (get_user(dev, p))
+ return -EFAULT;
+ if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+ return -ENXIO;
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -EBUSY;
+ return synth_devs[dev]->ioctl(dev, cmd, arg);
+
+ case SNDCTL_SEQ_NRSYNTHS:
+ val = max_synthdev;
+ break;
+
+ case SNDCTL_SEQ_NRMIDIS:
+ val = max_mididev;
+ break;
+
+ case SNDCTL_SYNTH_MEMAVL:
+ if (get_user(dev, p))
+ return -EFAULT;
+ if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+ return -ENXIO;
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -EBUSY;
+ val = synth_devs[dev]->ioctl(dev, cmd, arg);
+ break;
+
+ case SNDCTL_FM_4OP_ENABLE:
+ if (get_user(dev, p))
+ return -EFAULT;
+ if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+ return -ENXIO;
+ if (!(synth_open_mask & (1 << dev)))
+ return -ENXIO;
+ synth_devs[dev]->ioctl(dev, cmd, arg);
+ return 0;
+
+ case SNDCTL_SYNTH_INFO:
+ if (get_user(dev, &((struct synth_info __user *)arg)->device))
+ return -EFAULT;
+ 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);
+
+ /* Like SYNTH_INFO but returns ID in the name field */
+ case SNDCTL_SYNTH_ID:
+ if (get_user(dev, &((struct synth_info __user *)arg)->device))
+ return -EFAULT;
+ if (dev < 0 || dev >= max_synthdev)
+ return -ENXIO;
+ if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+ return -EBUSY;
+ memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
+ strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
+ inf.device = dev;
+ return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
+
+ case SNDCTL_SEQ_OUTOFBAND:
+ if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
+ return -EFAULT;
+ play_event(event_rec.arr);
+ return 0;
+
+ case SNDCTL_MIDI_INFO:
+ if (get_user(dev, &((struct midi_info __user *)arg)->device))
+ return -EFAULT;
+ if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
+ return -ENXIO;
+ midi_devs[dev]->info.device = dev;
+ return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
+
+ case SNDCTL_SEQ_THRESHOLD:
+ if (get_user(val, p))
+ return -EFAULT;
+ if (val < 1)
+ val = 1;
+ if (val >= SEQ_MAX_QUEUE)
+ val = SEQ_MAX_QUEUE - 1;
+ output_threshold = val;
+ return 0;
+
+ case SNDCTL_MIDI_PRETIME:
+ if (get_user(val, p))
+ return -EFAULT;
+ if (val < 0)
+ val = 0;
+ val = (HZ * val) / 10;
+ pre_event_timeout = val;
+ break;
+
+ default:
+ if (mode == OPEN_READ)
+ return -EIO;
+ if (!synth_devs[0])
+ return -ENXIO;
+ if (!(synth_open_mask & (1 << 0)))
+ return -ENXIO;
+ if (!synth_devs[0]->ioctl)
+ return -EINVAL;
+ return synth_devs[0]->ioctl(0, cmd, arg);
+ }
+ return put_user(val, p);
+}
+
+/* No kernel lock - we're using the global irq lock here */
+unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
+{
+ unsigned long flags;
+ unsigned int mask = 0;
+
+ dev = dev >> 4;
+
+ spin_lock_irqsave(&lock,flags);
+ /* input */
+ poll_wait(file, &midi_sleeper, wait);
+ if (iqlen)
+ mask |= POLLIN | POLLRDNORM;
+
+ /* output */
+ poll_wait(file, &seq_sleeper, wait);
+ if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+ mask |= POLLOUT | POLLWRNORM;
+ spin_unlock_irqrestore(&lock,flags);
+ return mask;
+}
+
+
+void sequencer_timer(unsigned long dummy)
+{
+ seq_startplay();
+}
+EXPORT_SYMBOL(sequencer_timer);
+
+int note_to_freq(int note_num)
+{
+
+ /*
+ * This routine converts a midi note to a frequency (multiplied by 1000)
+ */
+
+ int note, octave, note_freq;
+ static 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;
+}
+EXPORT_SYMBOL(note_to_freq);
+
+unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
+ int vibrato_cents)
+{
+ unsigned 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; /* Convert to cents */
+ bend += vibrato_cents;
+
+ 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 */
+}
+EXPORT_SYMBOL(compute_finetune);
+
+void sequencer_init(void)
+{
+ if (sequencer_ok)
+ return;
+ queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
+ if (queue == NULL)
+ {
+ printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
+ return;
+ }
+ iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
+ if (iqueue == NULL)
+ {
+ printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
+ vfree(queue);
+ return;
+ }
+ sequencer_ok = 1;
+}
+EXPORT_SYMBOL(sequencer_init);
+
+void sequencer_unload(void)
+{
+ vfree(queue);
+ vfree(iqueue);
+ queue = iqueue = NULL;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 09:23:02 +0000