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1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 | /* * sound/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> #define SEQUENCER_C #include "sound_config.h" #include "midi_ctrl.h" 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 */ extern unsigned long seq_time; static int obsolete_api_used = 0; /* * 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 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] = { 0 }; static int midi_written[MAX_MIDI_DEV] = { 0 }; static unsigned long prev_input_time = 0; static int prev_event_time; #include "tuning.h" #define EV_SZ 8 #define IEV_SZ 8 static unsigned char *queue = NULL; static unsigned 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_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 *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; save_flags(flags); cli(); if (!iqlen) { if (file->f_flags & O_NONBLOCK) { restore_flags(flags); return -EAGAIN; } interruptible_sleep_on_timeout(&midi_sleeper, pre_event_timeout); if (!iqlen) { restore_flags(flags); return 0; } } while (iqlen && c >= ev_len) { char *fixit = (char *) &iqueue[iqhead * IEV_SZ]; copy_to_user(&(buf)[p], fixit, ev_len); p += ev_len; c -= ev_len; iqhead = (iqhead + 1) % SEQ_MAX_QUEUE; iqlen--; } restore_flags(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 */ save_flags(flags); cli(); memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len); iqlen++; iqtail = (iqtail + 1) % SEQ_MAX_QUEUE; wake_up(&midi_sleeper); restore_flags(flags); } 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); } int sequencer_write(int dev, struct file *file, const char *buf, int count) { unsigned char event_rec[EV_SZ], ev_code; int p = 0, c, ev_size; int err; int mode = translate_mode(file); dev = dev >> 4; DEB(printk("sequencer_write(dev=%d, count=%d)\n", dev, count)); if (mode == OPEN_READ) return -EIO; c = count; while (c >= 4) { copy_from_user((char *) event_rec, &(buf)[p], 4); 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 + 4, 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; } copy_from_user((char *) &event_rec[4], &(buf)[p + 4], 4); } 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 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(); 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 */ interruptible_sleep_on(&seq_sleeper); } 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) { 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(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: if (seq_mode == SEQ_2) seq_copy_to_input(event_rec, 8); else { 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) { int dev = event_rec[1]; int i, l = 0; unsigned char *buf = &event_rec[2]; if ((int) 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; } static void seq_startplay(void) { unsigned long flags; int this_one, action; while (qlen > 0) { save_flags(flags); cli(); qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE; qlen--; restore_flags(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; unsigned long flags; if (!sequencer_ok) sequencer_init(); level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1; dev = dev >> 4; mode = translate_mode(file); DEB(printk("sequencer_open(dev=%d)\n", dev)); 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; } } save_flags(flags); cli(); if (sequencer_busy) { restore_flags(flags); return -EBUSY; } sequencer_busy = 1; obsolete_api_used = 0; restore_flags(flags); 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 (synth_devs[i]->owner) __MOD_INC_USE_COUNT (synth_devs[i]->owner); 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 (midi_devs[i]->owner) __MOD_INC_USE_COUNT (midi_devs[i]->owner); 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 (tmr->owner) __MOD_INC_USE_COUNT (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; } 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) interruptible_sleep_on_timeout(&seq_sleeper, HZ/10); } } void sequencer_release(int dev, struct file *file) { int i; int mode = translate_mode(file); dev = dev >> 4; DEB(printk("sequencer_release(dev=%d)\n", dev)); /* * 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(); interruptible_sleep_on_timeout(&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); if (synth_devs[i]->owner) __MOD_DEC_USE_COUNT (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); if (midi_devs[i]->owner) __MOD_DEC_USE_COUNT (midi_devs[i]->owner); } } if (seq_mode == SEQ_2) { tmr->close(tmr_no); if (tmr->owner) __MOD_DEC_USE_COUNT (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) { unsigned long flags; if (qlen && !seq_playing && !signal_pending(current)) seq_startplay(); save_flags(flags); cli(); if (qlen > 0) interruptible_sleep_on_timeout(&seq_sleeper, HZ); restore_flags(flags); 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 */ save_flags(flags); cli(); while (n && !midi_devs[dev]->outputc(dev, data)) { interruptible_sleep_on_timeout(&seq_sleeper, HZ/25); n--; } restore_flags(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; save_flags(flags); cli(); if (waitqueue_active(&seq_sleeper)) { /* printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */ wake_up(&seq_sleeper); } restore_flags(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, caddr_t arg) { int midi_dev, orig_dev, val, err; int mode = translate_mode(file); struct synth_info inf; struct seq_event_rec event_rec; unsigned long flags; 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, (int *)arg)) 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, (int *)arg)) 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, (int *)arg)) 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, (int *)arg)) 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, (int *)arg)) 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, (int *)arg)) 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, (int *)(&(((struct synth_info *)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, (int *)(&(((struct synth_info *)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)); strncpy(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; save_flags(flags); cli(); play_event(event_rec.arr); restore_flags(flags); return 0; case SNDCTL_MIDI_INFO: if (get_user(dev, (int *)(&(((struct midi_info *)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, (int *)arg)) 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, (int *)arg)) 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, (int *)arg); } /* 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; save_flags(flags); cli(); /* 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; restore_flags(flags); return mask; } void sequencer_timer(unsigned long 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; 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; } 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; if (semitones > 99) semitones = 99; 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(void) { /* drag in sequencer_syms.o */ { extern char sequencer_syms_symbol; sequencer_syms_symbol = 0; } if (sequencer_ok) return; MIDIbuf_init(); queue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * EV_SZ); if (queue == NULL) { printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n"); return; } iqueue = (unsigned char *)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; } void sequencer_unload(void) { if(queue) { vfree(queue); queue=NULL; } if(iqueue) { vfree(iqueue); iqueue=NULL; } } |