1863 lines
36 KiB
C
1863 lines
36 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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* $Id: sequencer.c,v 1.6 1994/08/02 07:40:49 davidg Exp $
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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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static struct sound_timer_operations *tmr;
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static int tmr_no = -1; /* Currently selected timer */
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static int pending_timer = -1; /* For timer change operation */
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/*
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* Local counts for number of synth and MIDI devices. These are initialized
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* by the sequencer_open.
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*/
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static int max_mididev = 0;
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static int max_synthdev = 0;
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/*
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* The seq_mode gives the operating mode of the sequencer:
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* 1 = level1 (the default)
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* 2 = level2 (extended capabilites)
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*/
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#define SEQ_1 1
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#define SEQ_2 2
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static int seq_mode = SEQ_1;
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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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static int midi_opened[MAX_MIDI_DEV] =
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{0};
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static int midi_written[MAX_MIDI_DEV] =
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{0};
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unsigned long prev_input_time = 0;
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int prev_event_time;
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unsigned long seq_time = 0;
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#include "tuning.h"
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#define EV_SZ 8
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#define IEV_SZ 8
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static unsigned char *queue = NULL;
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static unsigned char *iqueue = NULL;
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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 int pre_event_timeout;
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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 enabled.
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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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int ev_len;
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unsigned long flags;
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dev = dev >> 4;
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ev_len = seq_mode == SEQ_1 ? 4 : 8;
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if (dev) /*
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* Patch manager device
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*/
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return pmgr_read (dev - 1, file, buf, count);
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DISABLE_INTR (flags);
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if (!iqlen)
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{
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DO_SLEEP (midi_sleeper, midi_sleep_flag, pre_event_timeout);
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if (!iqlen)
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{
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RESTORE_INTR (flags);
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return 0;
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}
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}
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while (iqlen && c >= ev_len)
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{
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COPY_TO_USER (buf, p, &iqueue[iqhead * IEV_SZ], ev_len);
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p += ev_len;
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c -= ev_len;
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iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
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iqlen--;
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}
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RESTORE_INTR (flags);
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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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/*
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* Currently NOP
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*/
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}
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void
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seq_copy_to_input (unsigned char *event, int len)
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{
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unsigned long flags;
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/*
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* Verify that the len is valid for the current mode.
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*/
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if (len != 4 && len != 8)
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return;
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if ((seq_mode == SEQ_1) != (len == 4))
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return;
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if (iqlen >= (SEQ_MAX_QUEUE - 1))
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return; /* Overflow */
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DISABLE_INTR (flags);
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memcpy (&iqueue[iqtail * IEV_SZ], event, len);
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iqlen++;
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iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
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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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unsigned int tstamp;
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unsigned char event[4];
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if (data == 0xfe) /* Ignore active sensing */
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return;
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tstamp = GET_TIME () - seq_time;
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if (tstamp != prev_input_time)
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{
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tstamp = (tstamp << 8) | SEQ_WAIT;
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seq_copy_to_input ((unsigned char *) &tstamp, 4);
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prev_input_time = tstamp;
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}
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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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seq_copy_to_input (event, 4);
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}
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void
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seq_input_event (unsigned char *event, int len)
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{
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unsigned long this_time;
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if (seq_mode == SEQ_2)
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this_time = tmr->get_time (tmr_no);
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else
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this_time = GET_TIME () - seq_time;
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if (this_time != prev_input_time)
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{
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unsigned char tmp_event[8];
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tmp_event[0] = EV_TIMING;
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tmp_event[1] = TMR_WAIT_ABS;
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tmp_event[2] = 0;
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tmp_event[3] = 0;
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*(unsigned long *) &tmp_event[4] = this_time;
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seq_copy_to_input (tmp_event, 8);
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prev_input_time = this_time;
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}
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seq_copy_to_input (event, len);
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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) /*
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* Patch manager device
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*/
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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 >= max_synthdev)
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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 >= 128)
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{
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if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
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{
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printk ("Sequencer: Invalid level 2 event %x\n", ev_code);
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return RET_ERROR (EINVAL);
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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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{
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if (seq_mode == SEQ_2)
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{
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printk ("Sequencer: 4 byte event in level 2 mode\n");
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return RET_ERROR (EINVAL);
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}
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ev_size = 4;
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}
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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 >= max_mididev)
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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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/*
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* Test if there is space in the queue
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*/
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if (qlen >= SEQ_MAX_QUEUE)
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if (!seq_playing)
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seq_startplay (); /*
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* Give chance to drain the queue
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*/
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if (qlen >= SEQ_MAX_QUEUE && !SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
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{
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/*
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* Sleep until there is enough space on the queue
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*/
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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; /*
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* To be sure
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*/
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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 >= max_synthdev)
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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[4], 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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case SEQ_VOLMODE:
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if (synth_devs[dev]->volume_method != NULL)
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synth_devs[dev]->volume_method (dev, q[3]);
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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 int
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find_voice (int dev, int chn, int note)
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{
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unsigned short key;
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int i;
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key = (chn << 8) | (note + 1);
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for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
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if (synth_devs[dev]->alloc.map[i] == key)
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return i;
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return -1;
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}
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static int
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alloc_voice (int dev, int chn, int note)
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{
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unsigned short key;
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int voice;
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key = (chn << 8) | (note + 1);
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voice = synth_devs[dev]->alloc_voice (dev, chn, note,
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&synth_devs[dev]->alloc);
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synth_devs[dev]->alloc.map[voice] = key;
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return voice;
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}
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static void
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seq_chn_voice_event (unsigned char *event)
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{
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unsigned char dev = event[1];
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unsigned char cmd = event[2];
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unsigned char chn = event[3];
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unsigned char note = event[4];
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unsigned char parm = event[5];
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int voice = -1;
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if ((int) dev > max_synthdev)
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return;
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if (!(synth_open_mask & (1 << dev)))
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return;
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if (!synth_devs[dev])
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return;
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if (seq_mode == SEQ_2)
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if (synth_devs[dev]->alloc_voice)
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voice = find_voice (dev, chn, note);
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if (cmd == MIDI_NOTEON && parm == 0)
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{
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cmd = MIDI_NOTEOFF;
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parm = 64;
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}
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switch (cmd)
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{
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case MIDI_NOTEON:
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if (note > 127)
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return;
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if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
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{
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voice = alloc_voice (dev, chn, note);
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}
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if (voice == -1)
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voice = chn;
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if (seq_mode == SEQ_2)
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{
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synth_devs[dev]->set_instr (dev, voice,
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synth_devs[dev]->chn_info[chn].pgm_num);
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}
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synth_devs[dev]->start_note (dev, voice, note, parm);
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break;
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case MIDI_NOTEOFF:
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if (voice == -1)
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voice = chn;
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synth_devs[dev]->kill_note (dev, voice, note, parm);
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break;
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case MIDI_KEY_PRESSURE:
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/* To be implemented */
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break;
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default:;
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}
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}
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static void
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seq_chn_common_event (unsigned char *event)
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{
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unsigned char dev = event[1];
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unsigned char cmd = event[2];
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unsigned char chn = event[3];
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unsigned char p1 = event[4];
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/* unsigned char p2 = event[5]; */
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unsigned short w14 = *(short *) &event[6];
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if ((int) dev > max_synthdev)
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return;
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if (!(synth_open_mask & (1 << dev)))
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return;
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if (!synth_devs[dev])
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return;
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switch (cmd)
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{
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case MIDI_PGM_CHANGE:
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if (seq_mode == SEQ_2)
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{
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synth_devs[dev]->chn_info[chn].pgm_num = p1;
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}
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else
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synth_devs[dev]->set_instr (dev, chn, p1);
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break;
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case MIDI_CTL_CHANGE:
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if (p1 == CTRL_MAIN_VOLUME)
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{
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w14 = (unsigned short) (((int) w14 * 16383) / 100);
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p1 = CTL_MAIN_VOLUME;
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}
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if (p1 == CTRL_EXPRESSION)
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{
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w14 *= 128;
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p1 = CTL_EXPRESSION;
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}
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if (seq_mode == SEQ_2)
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{
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if (chn > 15 || p1 > 127)
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break;
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synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0xff;
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if (dev < num_synths)
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{
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int val = w14 & 0xff;
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if (p1 < 64) /* Combine MSB and LSB */
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{
|
|
val = ((synth_devs[dev]->
|
|
chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
|
|
| (synth_devs[dev]->
|
|
chn_info[chn].controllers[p1 | 32] & 0x7f);
|
|
p1 &= ~32;
|
|
}
|
|
else
|
|
val = synth_devs[dev]->chn_info[chn].controllers[p1];
|
|
|
|
synth_devs[dev]->controller (dev, chn, p1, val);
|
|
}
|
|
else
|
|
synth_devs[dev]->controller (dev, chn, p1, w14);
|
|
}
|
|
else
|
|
synth_devs[dev]->controller (dev, chn, p1, w14);
|
|
break;
|
|
|
|
case MIDI_PITCH_BEND:
|
|
synth_devs[dev]->bender (dev, chn, w14);
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
}
|
|
|
|
static int
|
|
seq_timing_event (unsigned char *event)
|
|
{
|
|
unsigned char cmd = event[1];
|
|
unsigned int parm = *(int *) &event[4];
|
|
|
|
if (seq_mode == SEQ_2)
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = tmr->event (tmr_no, event)) == TIMER_ARMED)
|
|
{
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DISABLE_INTR (flags);
|
|
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
|
|
{
|
|
WAKE_UP (seq_sleeper, seq_sleep_flag);
|
|
}
|
|
RESTORE_INTR (flags);
|
|
}
|
|
}
|
|
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;
|
|
|
|
seq_playing = 1;
|
|
time = parm;
|
|
prev_event_time = time;
|
|
|
|
request_sound_timer (time);
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DISABLE_INTR (flags);
|
|
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
|
|
{
|
|
WAKE_UP (seq_sleeper, seq_sleep_flag);
|
|
}
|
|
RESTORE_INTR (flags);
|
|
}
|
|
|
|
return TIMER_ARMED;
|
|
}
|
|
break;
|
|
|
|
case TMR_START:
|
|
seq_time = GET_TIME ();
|
|
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, 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)
|
|
{
|
|
/* unsigned char cmd = event[1]; */
|
|
|
|
printk ("seq_local_event() called. WHY????????\n");
|
|
}
|
|
|
|
static void
|
|
seq_startplay (void)
|
|
{
|
|
int this_one;
|
|
unsigned long *delay;
|
|
unsigned char *q;
|
|
|
|
while (qlen > 0)
|
|
{
|
|
|
|
seq_playing = 1;
|
|
|
|
qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
|
|
qlen--;
|
|
|
|
q = &queue[this_one * EV_SZ];
|
|
|
|
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 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;
|
|
prev_event_time = time;
|
|
|
|
request_sound_timer (time);
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DISABLE_INTR (flags);
|
|
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
|
|
{
|
|
WAKE_UP (seq_sleeper, seq_sleep_flag);
|
|
}
|
|
RESTORE_INTR (flags);
|
|
}
|
|
/*
|
|
* The timer is now active and will reinvoke this function
|
|
* after the timer expires. Return to the caller now.
|
|
*/
|
|
return;
|
|
}
|
|
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 ();
|
|
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 (!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:
|
|
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;
|
|
}
|
|
break;
|
|
|
|
case EV_SEQ_LOCAL:
|
|
seq_local_event (q);
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
|
|
}
|
|
|
|
seq_playing = 0;
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_treshold)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DISABLE_INTR (flags);
|
|
if (SOMEONE_WAITING (seq_sleeper, seq_sleep_flag))
|
|
{
|
|
WAKE_UP (seq_sleeper, seq_sleep_flag);
|
|
}
|
|
RESTORE_INTR (flags);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
reset_controllers (int dev, unsigned char *controller, int update_dev)
|
|
{
|
|
#include "midi_ctrl.h"
|
|
|
|
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]->converter != NULL)
|
|
{
|
|
synth_devs[max_synthdev++] =
|
|
midi_devs[dev]->converter;
|
|
}
|
|
|
|
for (dev = 0; dev < max_synthdev; dev++)
|
|
{
|
|
int chn;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
max_mididev = 0;
|
|
seq_mode = SEQ_2;
|
|
}
|
|
|
|
int
|
|
sequencer_open (int dev, struct fileinfo *file)
|
|
{
|
|
int retval, mode, i;
|
|
int level, tmp;
|
|
|
|
level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
|
|
|
|
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 (dev >= MAX_SYNTH_DEV)
|
|
return RET_ERROR (ENXIO);
|
|
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);
|
|
}
|
|
|
|
max_mididev = num_midis;
|
|
max_synthdev = num_synths;
|
|
pre_event_timeout = 0;
|
|
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]->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)
|
|
{
|
|
printk ("Using timer #%d\n", tmr_no);
|
|
if (tmr == NULL)
|
|
{
|
|
printk ("sequencer: No timer for level 2\n");
|
|
return RET_ERROR (ENXIO);
|
|
}
|
|
setup_mode2 ();
|
|
}
|
|
|
|
if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
|
|
if (!max_mididev)
|
|
{
|
|
printk ("Sequencer: No Midi devices. Input not possible\n");
|
|
return RET_ERROR (ENXIO);
|
|
}
|
|
|
|
if (!max_synthdev && !max_mididev)
|
|
return RET_ERROR (ENXIO);
|
|
|
|
synth_open_mask = 0;
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
{
|
|
midi_opened[i] = 0;
|
|
midi_written[i] = 0;
|
|
}
|
|
|
|
/*
|
|
* if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
|
|
*/
|
|
for (i = 0; i < max_synthdev; i++) /*
|
|
* Open synth devices
|
|
*/
|
|
if ((tmp = synth_devs[i]->open (i, mode)) < 0)
|
|
{
|
|
printk ("Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
|
|
if (synth_devs[i]->midi_dev)
|
|
printk ("(Maps to midi dev #%d\n", synth_devs[i]->midi_dev);
|
|
}
|
|
else
|
|
{
|
|
synth_open_mask |= (1 << i);
|
|
if (synth_devs[i]->midi_dev) /*
|
|
* Is a midi interface
|
|
*/
|
|
midi_opened[synth_devs[i]->midi_dev] = 1;
|
|
}
|
|
|
|
seq_time = GET_TIME ();
|
|
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])
|
|
{
|
|
if ((retval = midi_devs[i]->open (i, mode,
|
|
sequencer_midi_input, sequencer_midi_output)) >= 0)
|
|
midi_opened[i] = 1;
|
|
}
|
|
}
|
|
|
|
if (seq_mode == SEQ_2)
|
|
{
|
|
tmr->open (tmr_no, seq_mode);
|
|
}
|
|
|
|
sequencer_busy = 1;
|
|
RESET_WAIT_QUEUE (seq_sleeper, seq_sleep_flag);
|
|
RESET_WAIT_QUEUE (midi_sleeper, midi_sleep_flag);
|
|
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 (midi_sleeper, midi_sleep_flag) && 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)
|
|
{
|
|
DO_SLEEP (seq_sleeper, seq_sleep_flag, HZ / 10);
|
|
}
|
|
}
|
|
}
|
|
|
|
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
|
|
*/
|
|
|
|
if (mode != OPEN_READ)
|
|
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 < max_synthdev; i++)
|
|
if (synth_open_mask & (1 << i)) /*
|
|
* Actually opened
|
|
*/
|
|
if (synth_devs[i])
|
|
{
|
|
synth_devs[i]->close (i);
|
|
|
|
if (synth_devs[i]->midi_dev)
|
|
midi_opened[synth_devs[i]->midi_dev] = 0;
|
|
}
|
|
|
|
for (i = 0; i < num_synths; i++)
|
|
if (pmgr_present[i])
|
|
pmgr_inform (i, PM_E_CLOSED, 0, 0, 0, 0);
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
if (midi_opened[i])
|
|
midi_devs[i]->close (i);
|
|
|
|
if (seq_mode == SEQ_2)
|
|
tmr->close (tmr_no);
|
|
|
|
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;
|
|
|
|
int chn;
|
|
|
|
sound_stop_timer ();
|
|
seq_time = GET_TIME ();
|
|
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 (i = 0; i < max_synthdev; i++)
|
|
if (synth_open_mask & (1 << i))
|
|
if (synth_devs[i])
|
|
for (chn = 0; chn < 16; chn++)
|
|
synth_devs[i]->controller (i, chn, 0xfe, 0); /* All notes off */
|
|
}
|
|
else
|
|
{
|
|
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 & 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");
|
|
|
|
}
|
|
|
|
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 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_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 (dev) /* Patch manager */
|
|
return RET_ERROR (EIO);
|
|
|
|
if (seq_mode != SEQ_2)
|
|
return RET_ERROR (EINVAL);
|
|
return tmr->ioctl (tmr_no, cmd, arg);
|
|
break;
|
|
|
|
case SNDCTL_TMR_SELECT:
|
|
if (dev) /* Patch manager */
|
|
return RET_ERROR (EIO);
|
|
|
|
if (seq_mode != SEQ_2)
|
|
return RET_ERROR (EINVAL);
|
|
pending_timer = IOCTL_IN (arg);
|
|
|
|
if (pending_timer < 0 || pending_timer >= num_sound_timers)
|
|
{
|
|
pending_timer = -1;
|
|
return RET_ERROR (EINVAL);
|
|
}
|
|
|
|
return IOCTL_OUT (arg, pending_timer);
|
|
break;
|
|
|
|
case SNDCTL_SEQ_PANIC:
|
|
seq_panic ();
|
|
break;
|
|
|
|
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 ();
|
|
if (qlen)
|
|
return RET_ERROR (EINTR);
|
|
else
|
|
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 >= max_mididev)
|
|
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
|
|
*/
|
|
if (seq_mode == SEQ_2)
|
|
return tmr->ioctl (tmr_no, cmd, arg);
|
|
|
|
if (IOCTL_IN (arg) != 0)
|
|
return RET_ERROR (EINVAL);
|
|
|
|
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, max_synthdev);
|
|
break;
|
|
|
|
case SNDCTL_SEQ_NRMIDIS:
|
|
return IOCTL_OUT (arg, max_mididev);
|
|
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 >= max_synthdev)
|
|
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 >= max_mididev)
|
|
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;
|
|
|
|
case SNDCTL_MIDI_PRETIME:
|
|
{
|
|
int val = IOCTL_IN (arg);
|
|
|
|
if (val < 0)
|
|
val = 0;
|
|
|
|
val = (HZ * val) / 10;
|
|
pre_event_timeout = val;
|
|
return IOCTL_OUT (arg, val);
|
|
}
|
|
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)
|
|
{
|
|
unsigned long flags;
|
|
|
|
dev = dev >> 4;
|
|
|
|
switch (sel_type)
|
|
{
|
|
case SEL_IN:
|
|
if (!iqlen)
|
|
{
|
|
DISABLE_INTR (flags);
|
|
midi_sleep_flag.mode = WK_SLEEP;
|
|
select_wait (&midi_sleeper, wait);
|
|
RESTORE_INTR (flags);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
break;
|
|
|
|
case SEL_OUT:
|
|
if (qlen >= SEQ_MAX_QUEUE)
|
|
{
|
|
DISABLE_INTR (flags);
|
|
seq_sleep_flag.mode = WK_SLEEP;
|
|
select_wait (&seq_sleeper, wait);
|
|
RESTORE_INTR (flags);
|
|
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
|
|
};
|
|
|
|
#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, multiplier = 1;
|
|
|
|
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;
|
|
*/
|
|
while (bend > 2399)
|
|
{
|
|
multiplier *= 4;
|
|
bend -= 2400;
|
|
}
|
|
|
|
semitones = bend / 100;
|
|
cents = bend % 100;
|
|
|
|
amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents])
|
|
/ 10000;
|
|
|
|
if (negative)
|
|
return (base_freq * 10000) / amount; /*
|
|
* Bend down
|
|
*/
|
|
else
|
|
return (base_freq * amount) / 10000; /*
|
|
* Bend up
|
|
*/
|
|
}
|
|
|
|
|
|
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
|