diff options
Diffstat (limited to 'sys/i386/isa/sound/sequencer.c')
| -rw-r--r-- | sys/i386/isa/sound/sequencer.c | 1137 |
1 files changed, 1137 insertions, 0 deletions
diff --git a/sys/i386/isa/sound/sequencer.c b/sys/i386/isa/sound/sequencer.c new file mode 100644 index 0000000..2d4ef37 --- /dev/null +++ b/sys/i386/isa/sound/sequencer.c @@ -0,0 +1,1137 @@ +/* + * linux/kernel/chr_drv/sound/sequencer.c + * + * The sequencer personality manager. + * + * (C) 1992 Hannu Savolainen (hsavolai@cs.helsinki.fi) See COPYING for further + * details. Should be distributed with this file. + */ + +#define SEQUENCER_C +#include "sound_config.h" + +#ifdef CONFIGURE_SOUNDCARD + +#ifndef EXCLUDE_SEQUENCER + +static int sequencer_ok = 0; + +DEFINE_WAIT_QUEUE (seq_sleeper, seq_sleep_flag); +DEFINE_WAIT_QUEUE (midi_sleeper, midi_sleep_flag); + +static int midi_opened[MAX_MIDI_DEV] = +{0}; /* 1 if the process has opened MIDI */ +static int midi_written[MAX_MIDI_DEV] = +{0}; + +long seq_time = 0; /* Reference point for the timer */ + +#include "tuning.h" + +#define EV_SZ 8 +static unsigned char queue[SEQ_MAX_QUEUE][EV_SZ]; +static unsigned char iqueue[SEQ_MAX_QUEUE][4]; +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 int sequencer_busy = 0; +static int output_treshold; +static unsigned synth_open_mask; + +static int seq_queue (unsigned char *note); +static void seq_startplay (void); +static int seq_sync (void); +static void seq_reset (void); +static int pmgr_present[MAX_SYNTH_DEV] = +{0}; + +#if MAX_SYNTH_DEV > 15 +#error Too many synthesizer devices +#endif + +int +sequencer_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count) +{ + int c = count, p = 0; + + dev = dev >> 4; + + if (dev) /* Patch manager device */ + return pmgr_read (dev - 1, file, buf, count); + + while (c > 3) + { + if (!iqlen) + { + INTERRUPTIBLE_SLEEP_ON (midi_sleeper, midi_sleep_flag); + + if (!iqlen) + return count - c; + } + + COPY_TO_USER (buf, p, &iqueue[iqhead][0], 4); + p += 4; + c -= 4; + + iqhead = (iqhead + 1) % SEQ_MAX_QUEUE; + iqlen--; + } + + return count - c; +} + +void +sequencer_midi_output (int dev) +{ + /* Currently NOP */ +} + +static void +copy_to_input (unsigned char *event) +{ + unsigned long flags; + + if (iqlen >= (SEQ_MAX_QUEUE - 1)) + return; /* Overflow */ + + memcpy (iqueue[iqtail], event, 4); + iqlen++; + iqtail = (iqtail + 1) % SEQ_MAX_QUEUE; + + DISABLE_INTR (flags); + if (midi_sleep_flag) + { + WAKE_UP (midi_sleeper); + } + RESTORE_INTR (flags); +} + +void +sequencer_midi_input (int dev, unsigned char data) +{ + int tstamp; + unsigned char event[4]; + + if (data == 0xfe) /* Active sensing */ + return; /* Ignore */ + + tstamp = GET_TIME () - seq_time; /* Time since open() */ + tstamp = (tstamp << 8) | SEQ_WAIT; + + copy_to_input ((unsigned char *) &tstamp); + + event[0] = SEQ_MIDIPUTC; + event[1] = data; + event[2] = dev; + event[3] = 0; + + copy_to_input (event); +} + +int +sequencer_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count) +{ + unsigned char event[EV_SZ], ev_code; + int p = 0, c, ev_size; + int err; + int mode = file->mode & O_ACCMODE; + + dev = dev >> 4; + + DEB (printk ("sequencer_write(dev=%d, count=%d)\n", dev, count)); + + if (mode == OPEN_READ) + return RET_ERROR (EIO); + + if (dev) /* Patch manager device */ + return pmgr_write (dev - 1, file, buf, count); + + c = count; + + while (c >= 4) + { + COPY_FROM_USER (event, buf, p, 4); + ev_code = event[0]; + + if (ev_code == SEQ_FULLSIZE) + { + int err; + + dev = *(unsigned short *) &event[2]; + if (dev < 0 || dev >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev))) + return RET_ERROR (ENXIO); + + err = synth_devs[dev]->load_patch (dev, *(short *) &event[0], buf, p + 4, c, 0); + if (err < 0) + return err; + + return err; + } + + if (ev_code == SEQ_EXTENDED || ev_code == SEQ_PRIVATE) + { + + ev_size = 8; + + if (c < ev_size) + { + if (!seq_playing) + seq_startplay (); + return count - c; + } + + COPY_FROM_USER (&event[4], buf, p + 4, 4); + + } + else + ev_size = 4; + + if (event[0] == SEQ_MIDIPUTC) + { + + if (!midi_opened[event[2]]) + { + int mode; + int dev = event[2]; + + if (dev >= num_midis) + { + printk ("Sequencer Error: Nonexistent MIDI device %d\n", dev); + return RET_ERROR (ENXIO); + } + + mode = file->mode & O_ACCMODE; + + if ((err = midi_devs[dev]->open (dev, mode)) < 0) + { + seq_reset (); + printk ("Sequencer Error: Unable to open Midi #%d\n", dev); + return err; + } + + midi_opened[dev] = 1; + } + + } + + if (!seq_queue (event)) + { + + if (!seq_playing) + seq_startplay (); + return count - c; + } + + p += ev_size; + c -= ev_size; + } + + if (!seq_playing) + seq_startplay (); + + return count; +} + +static int +seq_queue (unsigned char *note) +{ + + /* 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 (qlen >= SEQ_MAX_QUEUE && !seq_sleep_flag) + { + /* Sleep until there is enough space on the queue */ + INTERRUPTIBLE_SLEEP_ON (seq_sleeper, seq_sleep_flag); + } + + if (qlen >= SEQ_MAX_QUEUE) + return 0; /* To be sure */ + + memcpy (&queue[qtail][0], 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 >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev))) + return RET_ERROR (ENXIO); + + switch (q[1]) + { + case SEQ_NOTEOFF: + synth_devs[dev]->kill_note (dev, q[3], q[5]); + break; + + case SEQ_NOTEON: + if (q[4] > 127 && q[4] != 255) + return 0; + + synth_devs[dev]->start_note (dev, q[3], q[4], q[5]); + break; + + case SEQ_PGMCHANGE: + synth_devs[dev]->set_instr (dev, q[3], q[4]); + break; + + case SEQ_AFTERTOUCH: + synth_devs[dev]->aftertouch (dev, q[3], q[4]); + break; + + case SEQ_BALANCE: + synth_devs[dev]->panning (dev, q[3], (char) q[4]); + break; + + case SEQ_CONTROLLER: + synth_devs[dev]->controller (dev, q[3], q[4], *(short *) &q[5]); + break; + + default: + return RET_ERROR (EINVAL); + } + + return 0; +} + +static void +seq_startplay (void) +{ + int this_one; + unsigned long *delay; + unsigned char *q; + + while (qlen > 0) + { + qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE; + qlen--; + + q = &queue[this_one][0]; + + switch (q[0]) + { + case SEQ_NOTEOFF: + if (synth_open_mask & (1 << 0)) + if (synth_devs[0]) + synth_devs[0]->kill_note (0, q[1], 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 long *) q; /* Bytes 1 to 3 are containing the + * delay in GET_TIME() */ + *delay = (*delay >> 8) & 0xffffff; + + if (*delay > 0) + { + long time; + + seq_playing = 1; + time = *delay; + + request_sound_timer (time); + + if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) + { + unsigned long flags; + + DISABLE_INTR (flags); + if (seq_sleep_flag) + { + seq_sleep_flag = 0; + WAKE_UP (seq_sleeper); + } + RESTORE_INTR (flags); + } + return; /* Stop here. Timer routine will continue + * playing after the delay */ + } + break; + + case SEQ_PGMCHANGE: + if (synth_open_mask & (1 << 0)) + if (synth_devs[0]) + synth_devs[0]->set_instr (0, q[1], q[2]); + break; + + case SEQ_SYNCTIMER: /* Reset timer */ + seq_time = GET_TIME (); + break; + + case SEQ_MIDIPUTC: /* Put a midi character */ + if (midi_opened[q[2]]) + { + int dev; + + dev = q[2]; + + if (!midi_devs[dev]->putc (dev, q[1])) + { + /* + * Output FIFO is full. Wait one timer cycle and try again. + */ + + qlen++; + qhead = this_one; /* Restore queue */ + seq_playing = 1; + request_sound_timer (-1); + return; + } + else + midi_written[dev] = 1; + } + break; + + case SEQ_ECHO: + copy_to_input (q); /* Echo back to the process */ + break; + + case SEQ_PRIVATE: + if (q[1] < num_synths) + synth_devs[q[1]]->hw_control (q[1], q); + break; + + case SEQ_EXTENDED: + extended_event (q); + break; + + default:; + } + + } + + seq_playing = 0; + + if ((SEQ_MAX_QUEUE - qlen) >= output_treshold) + { + unsigned long flags; + + DISABLE_INTR (flags); + if (seq_sleep_flag) + { + seq_sleep_flag = 0; + WAKE_UP (seq_sleeper); + } + RESTORE_INTR (flags); + } + +} + +int +sequencer_open (int dev, struct fileinfo *file) + { + int retval, mode, i; + + dev = dev >> 4; + mode = file->mode & O_ACCMODE; + + DEB (printk ("sequencer_open(dev=%d)\n", dev)); + + if (!sequencer_ok) + { + printk ("Soundcard: Sequencer not initialized\n"); + return RET_ERROR (ENXIO); + } + + if (dev) /* Patch manager device */ + { + int err; + + dev--; + if (pmgr_present[dev]) + return RET_ERROR (EBUSY); + if ((err = pmgr_open (dev)) < 0) + return err; /* Failed */ + + pmgr_present[dev] = 1; + return err; + } + + if (sequencer_busy) + { + printk ("Sequencer busy\n"); + return RET_ERROR (EBUSY); + } + + if (!(num_synths + num_midis)) + return RET_ERROR (ENXIO); + + synth_open_mask = 0; + + if (mode == OPEN_WRITE || mode == OPEN_READWRITE) + for (i = 0; i < num_synths; i++) /* Open synth devices */ + if (synth_devs[i]->open (i, mode) < 0) + printk ("Sequencer: Warning! Cannot open synth device #%d\n", i); + else + synth_open_mask |= (1 << i); + + seq_time = GET_TIME (); + + for (i = 0; i < num_midis; i++) + { + midi_opened[i] = 0; + midi_written[i] = 0; + } + + if (mode == OPEN_READ || mode == OPEN_READWRITE) + { /* Initialize midi input devices */ + if (!num_midis) + { + printk ("Sequencer: No Midi devices. Input not possible\n"); + return RET_ERROR (ENXIO); + } + + for (i = 0; i < num_midis; i++) + { + if ((retval = midi_devs[i]->open (i, mode)) >= 0) + midi_opened[i] = 1; + } + } + + sequencer_busy = 1; + seq_sleep_flag = midi_sleep_flag = 0; + output_treshold = SEQ_MAX_QUEUE / 2; + + for (i = 0; i < num_synths; i++) + if (pmgr_present[i]) + pmgr_inform (i, PM_E_OPENED, 0, 0, 0, 0); + + return 0; + } + +void +seq_drain_midi_queues (void) +{ + int i, n; + + /* + * Give the Midi drivers time to drain their output queues + */ + + n = 1; + + while (!PROCESS_ABORTING && n) + { + n = 0; + + for (i = 0; i < num_midis; 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) + { + REQUEST_TIMEOUT (HZ / 10, seq_sleeper); + INTERRUPTIBLE_SLEEP_ON (seq_sleeper, seq_sleep_flag); + } + } +} + +void +sequencer_release (int dev, struct fileinfo *file) + { + int i; + int mode = file->mode & O_ACCMODE; + + dev = dev >> 4; + + DEB (printk ("sequencer_release(dev=%d)\n", dev)); + + if (dev) /* Patch manager device */ + { + dev--; + pmgr_release (dev); + pmgr_present[dev] = 0; + return; + } + + /* + * Wait until the queue is empty + */ + while (!PROCESS_ABORTING && qlen) + { + seq_sync (); + } + + if (mode != OPEN_READ) + seq_drain_midi_queues (); /* Ensure the output queues are empty */ + seq_reset (); + if (mode != OPEN_READ) + seq_drain_midi_queues (); /* Flush the all notes off messages */ + + for (i = 0; i < num_midis; i++) + if (midi_opened[i]) + midi_devs[i]->close (i); + + if (mode == OPEN_WRITE || mode == OPEN_READWRITE) + for (i = 0; i < num_synths; i++) + if (synth_open_mask & (1 << i)) /* Actually opened */ + if (synth_devs[i]) + synth_devs[i]->close (i); + + for (i = 0; i < num_synths; i++) + if (pmgr_present[i]) + pmgr_inform (i, PM_E_CLOSED, 0, 0, 0, 0); + + sequencer_busy = 0; + } + +static int +seq_sync (void) +{ + if (qlen && !seq_playing && !PROCESS_ABORTING) + seq_startplay (); + + if (qlen && !seq_sleep_flag) /* Queue not empty */ + { + INTERRUPTIBLE_SLEEP_ON (seq_sleeper, seq_sleep_flag); + } + + return qlen; +} + +static void +midi_outc (int dev, unsigned char data) +{ + /* + * NOTE! Calls sleep(). Don't call this from interrupt. + */ + + int n; + + /* 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 = 300; /* Timeout in jiffies */ + + while (n && !midi_devs[dev]->putc (dev, data)) + { + REQUEST_TIMEOUT (1, seq_sleeper); + INTERRUPTIBLE_SLEEP_ON (seq_sleeper, seq_sleep_flag); + n--; + } +} + +static void +seq_reset (void) +{ + /* + * NOTE! Calls sleep(). Don't call this from interrupt. + */ + + int i, chn; + + sound_stop_timer (); + + qlen = qhead = qtail = 0; + iqlen = iqhead = iqtail = 0; + + for (i = 0; i < num_synths; i++) + if (synth_open_mask & (1 << i)) + if (synth_devs[i]) + synth_devs[i]->reset (i); + + for (i = 0; i < num_midis; i++) + if (midi_written[i]) /* Midi used. Some notes may still be playing */ + { + for (chn = 0; chn < 16; chn++) + { + midi_outc (i, 0xb0 + chn); /* Channel message */ + 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; + + if (seq_sleep_flag) + printk ("Sequencer Warning: Unexpected sleeping process\n"); + +} + +int +sequencer_ioctl (int dev, struct fileinfo *file, + unsigned int cmd, unsigned int arg) +{ + int midi_dev, orig_dev; + int mode = file->mode & O_ACCMODE; + + orig_dev = dev = dev >> 4; + + switch (cmd) + { + + case SNDCTL_SEQ_SYNC: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + if (mode == OPEN_READ) + return 0; + while (qlen && !PROCESS_ABORTING) + seq_sync (); + return 0; + break; + + case SNDCTL_SEQ_RESET: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + seq_reset (); + return 0; + break; + + case SNDCTL_SEQ_TESTMIDI: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + midi_dev = IOCTL_IN (arg); + if (midi_dev >= num_midis) + return RET_ERROR (ENXIO); + + if (!midi_opened[midi_dev]) + { + int err, mode; + + mode = file->mode & O_ACCMODE; + if ((err = midi_devs[midi_dev]->open (midi_dev, mode)) < 0) + return err; + } + + midi_opened[midi_dev] = 1; + + return 0; + break; + + case SNDCTL_SEQ_GETINCOUNT: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + if (mode == OPEN_WRITE) + return 0; + return IOCTL_OUT (arg, iqlen); + break; + + case SNDCTL_SEQ_GETOUTCOUNT: + + if (mode == OPEN_READ) + return 0; + return IOCTL_OUT (arg, SEQ_MAX_QUEUE - qlen); + break; + + case SNDCTL_SEQ_CTRLRATE: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + /* If *arg == 0, just return the current rate */ + return IOCTL_OUT (arg, HZ); + break; + + case SNDCTL_SEQ_RESETSAMPLES: + dev = IOCTL_IN (arg); + if (dev < 0 || dev >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev)) && !orig_dev) + return RET_ERROR (EBUSY); + + if (!orig_dev && pmgr_present[dev]) + pmgr_inform (dev, PM_E_PATCH_RESET, 0, 0, 0, 0); + + return synth_devs[dev]->ioctl (dev, cmd, arg); + break; + + case SNDCTL_SEQ_NRSYNTHS: + return IOCTL_OUT (arg, num_synths); + break; + + case SNDCTL_SEQ_NRMIDIS: + return IOCTL_OUT (arg, num_midis); + break; + + case SNDCTL_SYNTH_MEMAVL: + { + int dev = IOCTL_IN (arg); + + if (dev < 0 || dev >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev)) && !orig_dev) + return RET_ERROR (EBUSY); + + return IOCTL_OUT (arg, synth_devs[dev]->ioctl (dev, cmd, arg)); + } + break; + + case SNDCTL_FM_4OP_ENABLE: + { + int dev = IOCTL_IN (arg); + + if (dev < 0 || dev >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev))) + return RET_ERROR (ENXIO); + + synth_devs[dev]->ioctl (dev, cmd, arg); + return 0; + } + break; + + case SNDCTL_SYNTH_INFO: + { + struct synth_info inf; + int dev; + + IOCTL_FROM_USER ((char *) &inf, (char *) arg, 0, sizeof (inf)); + dev = inf.device; + + if (dev < 0 || dev >= num_synths) + return RET_ERROR (ENXIO); + + if (!(synth_open_mask & (1 << dev)) && !orig_dev) + return RET_ERROR (EBUSY); + + return synth_devs[dev]->ioctl (dev, cmd, arg); + } + break; + + case SNDCTL_MIDI_INFO: + { + struct midi_info inf; + int dev; + + IOCTL_FROM_USER ((char *) &inf, (char *) arg, 0, sizeof (inf)); + dev = inf.device; + + if (dev < 0 || dev >= num_midis) + return RET_ERROR (ENXIO); + + IOCTL_TO_USER ((char *) arg, 0, (char *) &(midi_devs[dev]->info), sizeof (inf)); + return 0; + } + break; + + case SNDCTL_PMGR_IFACE: + { + struct patmgr_info *inf; + int dev, err; + + inf = (struct patmgr_info *) KERNEL_MALLOC (sizeof (*inf)); + + IOCTL_FROM_USER ((char *) inf, (char *) arg, 0, sizeof (*inf)); + dev = inf->device; + + if (dev < 0 || dev >= num_synths) + { + KERNEL_FREE (inf); + return RET_ERROR (ENXIO); + } + + if (!synth_devs[dev]->pmgr_interface) + { + KERNEL_FREE (inf); + return RET_ERROR (ENXIO); + } + + if ((err = synth_devs[dev]->pmgr_interface (dev, inf)) == -1) + { + KERNEL_FREE (inf); + return err; + } + + IOCTL_TO_USER ((char *) arg, 0, (char *) inf, sizeof (*inf)); + KERNEL_FREE (inf); + return 0; + } + break; + + case SNDCTL_PMGR_ACCESS: + { + struct patmgr_info *inf; + int dev, err; + + inf = (struct patmgr_info *) KERNEL_MALLOC (sizeof (*inf)); + + IOCTL_FROM_USER ((char *) inf, (char *) arg, 0, sizeof (*inf)); + dev = inf->device; + + if (dev < 0 || dev >= num_synths) + { + KERNEL_FREE (inf); + return RET_ERROR (ENXIO); + } + + if (!pmgr_present[dev]) + { + KERNEL_FREE (inf); + return RET_ERROR (ESRCH); + } + + if ((err = pmgr_access (dev, inf)) < 0) + { + KERNEL_FREE (inf); + return err; + } + + IOCTL_TO_USER ((char *) arg, 0, (char *) inf, sizeof (*inf)); + KERNEL_FREE (inf); + return 0; + } + break; + + case SNDCTL_SEQ_TRESHOLD: + { + int tmp = IOCTL_IN (arg); + + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + if (tmp < 1) + tmp = 1; + if (tmp >= SEQ_MAX_QUEUE) + tmp = SEQ_MAX_QUEUE - 1; + output_treshold = tmp; + return 0; + } + break; + + default: + if (dev) /* Patch manager */ + return RET_ERROR (EIO); + + if (mode == OPEN_READ) + return RET_ERROR (EIO); + + if (!synth_devs[0]) + return RET_ERROR (ENXIO); + if (!(synth_open_mask & (1 << 0))) + return RET_ERROR (ENXIO); + return synth_devs[0]->ioctl (0, cmd, arg); + break; + } + + return RET_ERROR (EINVAL); +} + +#ifdef ALLOW_SELECT +int +sequencer_select (int dev, struct fileinfo *file, int sel_type, select_table * wait) +{ + dev = dev >> 4; + + switch (sel_type) + { + case SEL_IN: + if (!iqlen) + { + midi_sleep_flag = 1; + select_wait (&midi_sleeper, wait); + return 0; + } + return 1; + + break; + + case SEL_OUT: + if (qlen >= SEQ_MAX_QUEUE) + { + seq_sleep_flag = 1; + select_wait (&seq_sleeper, wait); + return 0; + } + return 1; + break; + + case SEL_EX: + return 0; + } + + return 0; +} + +#endif + +void +sequencer_timer (void) +{ + seq_startplay (); +} + +int +note_to_freq (int note_num) +{ + + /* + * This routine converts a midi note to a frequency (multiplied by 1000) + */ + + int note, octave, note_freq; + int notes[] = + { + 261632, 277189, 293671, 311132, 329632, 349232, + 369998, 391998, 415306, 440000, 466162, 493880 + }; /* Note freq*1000 for octave 5 */ + +#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) +{ + unsigned long amount; + int negative, semitones, cents; + + if (!bend) + return base_freq; + if (!range) + return base_freq; + + if (!base_freq) + return base_freq; + + if (range >= 8192) + range = 8191; + + bend = bend * range / 8192; + if (!bend) + return base_freq; + + negative = bend < 0 ? 1 : 0; + + if (bend < 0) + bend *= -1; + if (bend > range) + bend = range; + + if (bend > 2399) + bend = 2399; + + semitones = bend / 100; + cents = bend % 100; + + amount = semitone_tuning[semitones] * cent_tuning[cents] / 10000; + + if (negative) + return (base_freq * 10000) / amount; /* Bend down */ + else + return (base_freq * amount) / 10000; /* Bend up */ +} + + +long +sequencer_init (long mem_start) +{ + + sequencer_ok = 1; + return mem_start; +} + +#else +/* Stub version */ +int +sequencer_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count) +{ + return RET_ERROR (EIO); +} + +int +sequencer_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count) +{ + return RET_ERROR (EIO); +} + +int +sequencer_open (int dev, struct fileinfo *file) + { + return RET_ERROR (ENXIO); + } + +void +sequencer_release (int dev, struct fileinfo *file) + { + } +int +sequencer_ioctl (int dev, struct fileinfo *file, + unsigned int cmd, unsigned int arg) +{ + return RET_ERROR (EIO); +} + +int +sequencer_lseek (int dev, struct fileinfo *file, off_t offset, int orig) +{ + return RET_ERROR (EIO); +} + +long +sequencer_init (long mem_start) +{ + return mem_start; +} + +void +sequencer_midi_input (int dev, unsigned char data) +{ + return; +} + +void +sequencer_midi_output (int dev) +{ + return; +} + +int +sequencer_select (int dev, struct fileinfo *file, int sel_type, select_table * wait) +{ + return RET_ERROR (EIO); +} + +#endif + +#endif |
