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, 0 insertions, 1661 deletions
diff --git a/sound/oss/sequencer.c b/sound/oss/sequencer.c
deleted file mode 100644
index f19da4b47c1d..000000000000
--- a/sound/oss/sequencer.c
+++ /dev/null
@@ -1,1661 +0,0 @@
-/*
- * 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 (git 2.34.1) at 2024-05-02 00:01:20 +0000