1154 lines
23 KiB
C
1154 lines
23 KiB
C
/*
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* sound/sequencer.c
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*
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* The sequencer personality manager.
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#define SEQUENCER_C
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#include "sound_config.h"
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#ifdef CONFIGURE_SOUNDCARD
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#ifndef EXCLUDE_SEQUENCER
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static int sequencer_ok = 0;
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DEFINE_WAIT_QUEUE (seq_sleeper, seq_sleep_flag);
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/* DEFINE_WAIT_QUEUE (midi_sleeper, midi_sleep_flag); */
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#define midi_sleeper seq_sleeper
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#define midi_sleep_flag seq_sleep_flag
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static int midi_opened[MAX_MIDI_DEV] =
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{0}; /* 1 if the process has opened MIDI */
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static int midi_written[MAX_MIDI_DEV] =
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{0};
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long seq_time = 0; /* Reference point for the timer */
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#include "tuning.h"
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#define EV_SZ 8
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#define IEV_SZ 4
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static unsigned char *queue = NULL; /* SEQ_MAX_QUEUE * EV_SZ bytes */
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static unsigned char *iqueue = NULL; /* SEQ_MAX_QUEUE * IEV_SZ bytes */
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static volatile int qhead = 0, qtail = 0, qlen = 0;
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static volatile int iqhead = 0, iqtail = 0, iqlen = 0;
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static volatile int seq_playing = 0;
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static int sequencer_busy = 0;
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static int output_treshold;
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static unsigned synth_open_mask;
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static int seq_queue (unsigned char *note);
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static void seq_startplay (void);
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static int seq_sync (void);
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static void seq_reset (void);
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static int pmgr_present[MAX_SYNTH_DEV] =
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{0};
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#if MAX_SYNTH_DEV > 15
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#error Too many synthesizer devices
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#endif
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int
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sequencer_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
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{
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int c = count, p = 0;
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dev = dev >> 4;
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if (dev) /* Patch manager device */
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return pmgr_read (dev - 1, file, buf, count);
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while (c > 3)
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{
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if (!iqlen)
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{
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DO_SLEEP (midi_sleeper, midi_sleep_flag, 0);
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if (!iqlen)
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return count - c;
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}
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COPY_TO_USER (buf, p, &iqueue[iqhead * IEV_SZ], IEV_SZ);
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p += 4;
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c -= 4;
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iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
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iqlen--;
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}
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return count - c;
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}
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static void
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sequencer_midi_output (int dev)
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{
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/* Currently NOP */
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}
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static void
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copy_to_input (unsigned char *event)
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{
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unsigned long flags;
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if (iqlen >= (SEQ_MAX_QUEUE - 1))
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return; /* Overflow */
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memcpy (&iqueue[iqtail * IEV_SZ], event, IEV_SZ);
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iqlen++;
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iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
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DISABLE_INTR (flags);
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if (SOMEONE_WAITING (midi_sleeper, midi_sleep_flag))
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{
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WAKE_UP (midi_sleeper, midi_sleep_flag);
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}
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RESTORE_INTR (flags);
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}
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static void
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sequencer_midi_input (int dev, unsigned char data)
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{
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int tstamp;
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unsigned char event[4];
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if (data == 0xfe) /* Active sensing */
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return; /* Ignore */
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tstamp = GET_TIME () - seq_time; /* Time since open() */
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tstamp = (tstamp << 8) | SEQ_WAIT;
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copy_to_input ((unsigned char *) &tstamp);
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event[0] = SEQ_MIDIPUTC;
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event[1] = data;
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event[2] = dev;
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event[3] = 0;
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copy_to_input (event);
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}
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int
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sequencer_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
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{
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unsigned char event[EV_SZ], ev_code;
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int p = 0, c, ev_size;
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int err;
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int mode = file->mode & O_ACCMODE;
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dev = dev >> 4;
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DEB (printk ("sequencer_write(dev=%d, count=%d)\n", dev, count));
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if (mode == OPEN_READ)
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return RET_ERROR (EIO);
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if (dev) /* Patch manager device */
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return pmgr_write (dev - 1, file, buf, count);
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c = count;
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while (c >= 4)
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{
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COPY_FROM_USER (event, buf, p, 4);
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ev_code = event[0];
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if (ev_code == SEQ_FULLSIZE)
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{
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int err;
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dev = *(unsigned short *) &event[2];
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if (dev < 0 || dev >= num_synths)
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return RET_ERROR (ENXIO);
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if (!(synth_open_mask & (1 << dev)))
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return RET_ERROR (ENXIO);
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err = synth_devs[dev]->load_patch (dev, *(short *) &event[0], buf, p + 4, c, 0);
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if (err < 0)
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return err;
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return err;
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}
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if (ev_code == SEQ_EXTENDED || ev_code == SEQ_PRIVATE)
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{
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ev_size = 8;
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if (c < ev_size)
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{
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if (!seq_playing)
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seq_startplay ();
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return count - c;
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}
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COPY_FROM_USER (&event[4], buf, p + 4, 4);
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}
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else
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ev_size = 4;
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if (event[0] == SEQ_MIDIPUTC)
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{
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if (!midi_opened[event[2]])
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{
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int mode;
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int dev = event[2];
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if (dev >= num_midis)
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{
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printk ("Sequencer Error: Nonexistent MIDI device %d\n", dev);
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return RET_ERROR (ENXIO);
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}
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mode = file->mode & O_ACCMODE;
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if ((err = midi_devs[dev]->open (dev, mode,
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sequencer_midi_input, sequencer_midi_output)) < 0)
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{
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seq_reset ();
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printk ("Sequencer Error: Unable to open Midi #%d\n", dev);
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return err;
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}
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midi_opened[dev] = 1;
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}
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}
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if (!seq_queue (event))
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{
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if (!seq_playing)
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seq_startplay ();
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return count - c;
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}
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p += ev_size;
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c -= ev_size;
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}
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if (!seq_playing)
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seq_startplay ();
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return count;
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}
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static int
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seq_queue (unsigned char *note)
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{
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/* Test if there is space in the queue */
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if (qlen >= SEQ_MAX_QUEUE)
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if (!seq_playing)
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seq_startplay (); /* Give chance to drain the queue */
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if (qlen >= SEQ_MAX_QUEUE && !SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
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{
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/* Sleep until there is enough space on the queue */
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DO_SLEEP (seq_sleeper, seq_sleep_flag, 0);
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}
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if (qlen >= SEQ_MAX_QUEUE)
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return 0; /* To be sure */
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memcpy (&queue[qtail * EV_SZ], note, EV_SZ);
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qtail = (qtail + 1) % SEQ_MAX_QUEUE;
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qlen++;
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return 1;
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}
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static int
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extended_event (unsigned char *q)
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{
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int dev = q[2];
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if (dev < 0 || dev >= num_synths)
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return RET_ERROR (ENXIO);
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if (!(synth_open_mask & (1 << dev)))
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return RET_ERROR (ENXIO);
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switch (q[1])
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{
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case SEQ_NOTEOFF:
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synth_devs[dev]->kill_note (dev, q[3], q[5]);
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break;
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case SEQ_NOTEON:
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if (q[4] > 127 && q[4] != 255)
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return 0;
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synth_devs[dev]->start_note (dev, q[3], q[4], q[5]);
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break;
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case SEQ_PGMCHANGE:
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synth_devs[dev]->set_instr (dev, q[3], q[4]);
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break;
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case SEQ_AFTERTOUCH:
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synth_devs[dev]->aftertouch (dev, q[3], q[4]);
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break;
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case SEQ_BALANCE:
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synth_devs[dev]->panning (dev, q[3], (char) q[4]);
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break;
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case SEQ_CONTROLLER:
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synth_devs[dev]->controller (dev, q[3], q[4], *(short *) &q[5]);
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break;
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default:
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return RET_ERROR (EINVAL);
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}
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return 0;
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}
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static void
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seq_startplay (void)
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{
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int this_one;
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unsigned long *delay;
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unsigned char *q;
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while (qlen > 0)
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{
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qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
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qlen--;
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q = &queue[this_one * EV_SZ];
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switch (q[0])
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{
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case SEQ_NOTEOFF:
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if (synth_open_mask & (1 << 0))
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if (synth_devs[0])
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synth_devs[0]->kill_note (0, q[1], q[3]);
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break;
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case SEQ_NOTEON:
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if (q[4] < 128 || q[4] == 255)
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if (synth_open_mask & (1 << 0))
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if (synth_devs[0])
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synth_devs[0]->start_note (0, q[1], q[2], q[3]);
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break;
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case SEQ_WAIT:
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delay = (unsigned long *) q; /* Bytes 1 to 3 are containing the
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* delay in GET_TIME() */
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*delay = (*delay >> 8) & 0xffffff;
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if (*delay > 0)
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{
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long time;
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seq_playing = 1;
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time = *delay;
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request_sound_timer (time);
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if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
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{
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unsigned long flags;
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DISABLE_INTR (flags);
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if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
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{
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WAKE_UP (seq_sleeper, seq_sleep_flag);
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}
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RESTORE_INTR (flags);
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}
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return; /* Stop here. Timer routine will continue
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* playing after the delay */
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}
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break;
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case SEQ_PGMCHANGE:
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if (synth_open_mask & (1 << 0))
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if (synth_devs[0])
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synth_devs[0]->set_instr (0, q[1], q[2]);
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break;
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case SEQ_SYNCTIMER: /* Reset timer */
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seq_time = GET_TIME ();
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break;
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case SEQ_MIDIPUTC: /* Put a midi character */
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if (midi_opened[q[2]])
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{
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int dev;
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dev = q[2];
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if (!midi_devs[dev]->putc (dev, q[1]))
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{
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/*
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* Output FIFO is full. Wait one timer cycle and try again.
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*/
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qlen++;
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qhead = this_one; /* Restore queue */
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seq_playing = 1;
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request_sound_timer (-1);
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return;
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}
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else
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midi_written[dev] = 1;
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}
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break;
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case SEQ_ECHO:
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copy_to_input (q); /* Echo back to the process */
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break;
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case SEQ_PRIVATE:
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if (q[1] < num_synths)
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synth_devs[q[1]]->hw_control (q[1], q);
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break;
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case SEQ_EXTENDED:
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extended_event (q);
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break;
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default:;
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}
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}
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seq_playing = 0;
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if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
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{
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unsigned long flags;
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DISABLE_INTR (flags);
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if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
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{
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WAKE_UP (seq_sleeper, seq_sleep_flag);
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}
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RESTORE_INTR (flags);
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}
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}
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int
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sequencer_open (int dev, struct fileinfo *file)
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{
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int retval, mode, i;
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dev = dev >> 4;
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mode = file->mode & O_ACCMODE;
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DEB (printk ("sequencer_open(dev=%d)\n", dev));
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if (!sequencer_ok)
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{
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printk ("Soundcard: Sequencer not initialized\n");
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return RET_ERROR (ENXIO);
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}
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if (dev) /* Patch manager device */
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{
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int err;
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dev--;
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if (pmgr_present[dev])
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return RET_ERROR (EBUSY);
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if ((err = pmgr_open (dev)) < 0)
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return err; /* Failed */
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pmgr_present[dev] = 1;
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return err;
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}
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if (sequencer_busy)
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{
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printk ("Sequencer busy\n");
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return RET_ERROR (EBUSY);
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}
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if (!(num_synths + num_midis))
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return RET_ERROR (ENXIO);
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synth_open_mask = 0;
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if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
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for (i = 0; i < num_synths; i++) /* Open synth devices */
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if (synth_devs[i]->open (i, mode) < 0)
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printk ("Sequencer: Warning! Cannot open synth device #%d\n", i);
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else
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synth_open_mask |= (1 << i);
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seq_time = GET_TIME ();
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for (i = 0; i < num_midis; i++)
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{
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midi_opened[i] = 0;
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midi_written[i] = 0;
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}
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if (mode == OPEN_READ || mode == OPEN_READWRITE)
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{ /* Initialize midi input devices */
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if (!num_midis)
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{
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printk ("Sequencer: No Midi devices. Input not possible\n");
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return RET_ERROR (ENXIO);
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}
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for (i = 0; i < num_midis; i++)
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{
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if ((retval = midi_devs[i]->open (i, mode,
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sequencer_midi_input, sequencer_midi_output)) >= 0)
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midi_opened[i] = 1;
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}
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}
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sequencer_busy = 1;
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RESET_WAIT_QUEUE (seq_sleeper, seq_sleep_flag);
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RESET_WAIT_QUEUE (midi_sleeper, midi_sleep_flag);
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output_treshold = SEQ_MAX_QUEUE / 2;
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for (i = 0; i < num_synths; i++)
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if (pmgr_present[i])
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pmgr_inform (i, PM_E_OPENED, 0, 0, 0, 0);
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return 0;
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}
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void
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seq_drain_midi_queues (void)
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{
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int i, n;
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/*
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* Give the Midi drivers time to drain their output queues
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*/
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n = 1;
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while (!PROCESS_ABORTING (midi_sleeper, midi_sleep_flag) && n)
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{
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n = 0;
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for (i = 0; i < num_midis; i++)
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if (midi_opened[i] && midi_written[i])
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if (midi_devs[i]->buffer_status != NULL)
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if (midi_devs[i]->buffer_status (i))
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n++;
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/*
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* Let's have a delay
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*/
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if (n)
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{
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DO_SLEEP (seq_sleeper, seq_sleep_flag, HZ / 10);
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}
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}
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}
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|
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void
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sequencer_release (int dev, struct fileinfo *file)
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{
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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 (seq_sleeper, seq_sleep_flag) && 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_sleeper, seq_sleep_flag))
|
|
seq_startplay ();
|
|
|
|
if (qlen && !SOMEONE_WAITING (seq_sleeper, seq_sleep_flag)) /* Queue not empty */
|
|
{
|
|
DO_SLEEP (seq_sleeper, seq_sleep_flag, 0);
|
|
}
|
|
|
|
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))
|
|
{
|
|
DO_SLEEP (seq_sleeper, seq_sleep_flag, 4);
|
|
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,
|
|
(unsigned char) (0xb0 + (chn & 0xff))); /* Channel msg */
|
|
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 (SOMEONE_WAITING (seq_sleeper, 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_sleeper, seq_sleep_flag))
|
|
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,
|
|
sequencer_midi_input,
|
|
sequencer_midi_output)) < 0)
|
|
return err;
|
|
}
|
|
|
|
midi_opened[midi_dev] = 1;
|
|
|
|
return 0;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_GETINCOUNT:
|
|
if (dev) /* Patch manager */
|
|
return 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)
|
|
{
|
|
select_wait (&midi_sleeper, wait);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
|
|
break;
|
|
|
|
case SEL_OUT:
|
|
if (qlen >= SEQ_MAX_QUEUE)
|
|
{
|
|
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;
|
|
PERMANENT_MALLOC (unsigned char *, queue, SEQ_MAX_QUEUE * EV_SZ, mem_start);
|
|
PERMANENT_MALLOC (unsigned char *, iqueue, SEQ_MAX_QUEUE * IEV_SZ, mem_start);
|
|
|
|
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;
|
|
}
|
|
|
|
int
|
|
sequencer_select (int dev, struct fileinfo *file, int sel_type, select_table * wait)
|
|
{
|
|
return RET_ERROR (EIO);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|