mirror of https://gitee.com/openkylin/linux.git
1675 lines
34 KiB
C
1675 lines
34 KiB
C
/*
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* sound/oss/sequencer.c
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*
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* The sequencer personality manager.
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*/
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/*
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* Copyright (C) by Hannu Savolainen 1993-1997
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*
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* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
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* Version 2 (June 1991). See the "COPYING" file distributed with this software
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* for more info.
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*/
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/*
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* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
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* Alan Cox : reformatted and fixed a pair of null pointer bugs
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*/
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#include <linux/kmod.h>
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#include <linux/spinlock.h>
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#include "sound_config.h"
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#include "midi_ctrl.h"
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static int sequencer_ok;
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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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extern unsigned long seq_time;
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static int obsolete_api_used;
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static DEFINE_SPINLOCK(lock);
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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;
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static int max_synthdev;
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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 capabilities)
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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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static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
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static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
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static int midi_opened[MAX_MIDI_DEV];
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static int midi_written[MAX_MIDI_DEV];
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static unsigned long prev_input_time;
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static int prev_event_time;
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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;
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static unsigned char *iqueue;
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static volatile int qhead, qtail, qlen;
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static volatile int iqhead, iqtail, iqlen;
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static volatile int seq_playing;
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static volatile int sequencer_busy;
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static int output_threshold;
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static long pre_event_timeout;
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static unsigned synth_open_mask;
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static int seq_queue(unsigned char *note, char nonblock);
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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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#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 sequencer_read(int dev, struct file *file, char __user *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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spin_lock_irqsave(&lock,flags);
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if (!iqlen)
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{
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spin_unlock_irqrestore(&lock,flags);
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if (file->f_flags & O_NONBLOCK) {
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return -EAGAIN;
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}
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interruptible_sleep_on_timeout(&midi_sleeper,
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pre_event_timeout);
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spin_lock_irqsave(&lock,flags);
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if (!iqlen)
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{
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spin_unlock_irqrestore(&lock,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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char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
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spin_unlock_irqrestore(&lock,flags);
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if (copy_to_user(&(buf)[p], fixit, ev_len))
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return count - c;
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p += ev_len;
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c -= ev_len;
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spin_lock_irqsave(&lock,flags);
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iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
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iqlen--;
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}
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spin_unlock_irqrestore(&lock,flags);
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return count - c;
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}
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static void 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 seq_copy_to_input(unsigned char *event_rec, 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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spin_lock_irqsave(&lock,flags);
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memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
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iqlen++;
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iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
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wake_up(&midi_sleeper);
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spin_unlock_irqrestore(&lock,flags);
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}
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EXPORT_SYMBOL(seq_copy_to_input);
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static void 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_rec[4];
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if (data == 0xfe) /* Ignore active sensing */
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return;
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tstamp = jiffies - 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_rec[0] = SEQ_MIDIPUTC;
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event_rec[1] = data;
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event_rec[2] = dev;
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event_rec[3] = 0;
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seq_copy_to_input(event_rec, 4);
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}
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void seq_input_event(unsigned char *event_rec, 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 = jiffies - 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 int *) &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_rec, len);
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}
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EXPORT_SYMBOL(seq_input_event);
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int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
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{
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unsigned char event_rec[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 = translate_mode(file);
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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 -EIO;
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c = count;
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while (c >= 4)
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{
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if (copy_from_user((char *) event_rec, &(buf)[p], 4))
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goto out;
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ev_code = event_rec[0];
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if (ev_code == SEQ_FULLSIZE)
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{
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int err, fmt;
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dev = *(unsigned short *) &event_rec[2];
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if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
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return -ENXIO;
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if (!(synth_open_mask & (1 << dev)))
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return -ENXIO;
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fmt = (*(short *) &event_rec[0]) & 0xffff;
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err = synth_devs[dev]->load_patch(dev, fmt, 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(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
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return -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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if (copy_from_user((char *)&event_rec[4],
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&(buf)[p + 4], 4))
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goto out;
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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(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
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return -EINVAL;
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}
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ev_size = 4;
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if (event_rec[0] != SEQ_MIDIPUTC)
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obsolete_api_used = 1;
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}
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if (event_rec[0] == SEQ_MIDIPUTC)
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{
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if (!midi_opened[event_rec[2]])
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{
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int mode;
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int dev = event_rec[2];
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if (dev >= max_mididev || midi_devs[dev]==NULL)
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{
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/*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
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return -ENXIO;
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}
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mode = translate_mode(file);
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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(KERN_WARNING "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_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
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{
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int processed = count - c;
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if (!seq_playing)
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seq_startplay();
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if (!processed && (file->f_flags & O_NONBLOCK))
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return -EAGAIN;
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else
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return processed;
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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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out:
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return count;
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}
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static int seq_queue(unsigned char *note, char nonblock)
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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 (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
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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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interruptible_sleep_on(&seq_sleeper);
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}
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if (qlen >= SEQ_MAX_QUEUE)
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{
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return 0; /*
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* To be sure
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*/
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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 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 -ENXIO;
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if (!(synth_open_mask & (1 << dev)))
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return -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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if (q[5] == 0)
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{
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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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}
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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] | (q[6] << 8)));
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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 -EINVAL;
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}
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return 0;
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}
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static int 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 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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synth_devs[dev]->alloc.alloc_times[voice] =
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synth_devs[dev]->alloc.timestamp++;
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return voice;
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}
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static void seq_chn_voice_event(unsigned char *event_rec)
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{
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#define dev event_rec[1]
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#define cmd event_rec[2]
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#define chn event_rec[3]
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#define note event_rec[4]
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#define parm event_rec[5]
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int voice = -1;
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if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
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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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{
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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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}
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switch (cmd)
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{
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case MIDI_NOTEON:
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if (note > 127 && note != 255) /* Not a seq2 feature */
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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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/* Internal synthesizer (FM, GUS, etc) */
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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 && (int) dev < num_synths)
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{
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/*
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* The MIDI channel 10 is a percussive channel. Use the note
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* number to select the proper patch (128 to 255) to play.
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*/
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if (chn == 9)
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{
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synth_devs[dev]->set_instr(dev, voice, 128 + note);
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synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
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}
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synth_devs[dev]->setup_voice(dev, voice, chn);
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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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if (voice == -1)
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voice = chn;
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synth_devs[dev]->aftertouch(dev, voice, parm);
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break;
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default:;
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}
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#undef dev
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#undef cmd
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#undef chn
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#undef note
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#undef parm
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}
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static void seq_chn_common_event(unsigned char *event_rec)
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{
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unsigned char dev = event_rec[1];
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unsigned char cmd = event_rec[2];
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unsigned char chn = event_rec[3];
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unsigned char p1 = event_rec[4];
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/* unsigned char p2 = event_rec[5]; */
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unsigned short w14 = *(short *) &event_rec[6];
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|
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if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
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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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|
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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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if ((int) dev >= num_synths)
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synth_devs[dev]->set_instr(dev, chn, 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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|
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break;
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|
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case MIDI_CTL_CHANGE:
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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 & 0x7f;
|
|
|
|
if (p1 < 32) /* Setting MSB should clear LSB to 0 */
|
|
synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
|
|
|
|
if ((int) dev < num_synths)
|
|
{
|
|
int val = w14 & 0x7f;
|
|
int i, key;
|
|
|
|
if (p1 < 64) /* Combine MSB and LSB */
|
|
{
|
|
val = ((synth_devs[dev]->
|
|
chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
|
|
| (synth_devs[dev]->
|
|
chn_info[chn].controllers[p1 | 32] & 0x7f);
|
|
p1 &= ~32;
|
|
}
|
|
/* Handle all playing notes on this channel */
|
|
|
|
key = ((int) chn << 8);
|
|
|
|
for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
|
|
if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
|
|
synth_devs[dev]->controller(dev, i, p1, val);
|
|
}
|
|
else
|
|
synth_devs[dev]->controller(dev, chn, p1, w14);
|
|
}
|
|
else /* Mode 1 */
|
|
synth_devs[dev]->controller(dev, chn, p1, w14);
|
|
break;
|
|
|
|
case MIDI_PITCH_BEND:
|
|
if (seq_mode == SEQ_2)
|
|
{
|
|
synth_devs[dev]->chn_info[chn].bender_value = w14;
|
|
|
|
if ((int) dev < num_synths)
|
|
{
|
|
/* Handle all playing notes on this channel */
|
|
int i, key;
|
|
|
|
key = (chn << 8);
|
|
|
|
for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
|
|
if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
|
|
synth_devs[dev]->bender(dev, i, w14);
|
|
}
|
|
else
|
|
synth_devs[dev]->bender(dev, chn, w14);
|
|
}
|
|
else /* MODE 1 */
|
|
synth_devs[dev]->bender(dev, chn, w14);
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
}
|
|
|
|
static int seq_timing_event(unsigned char *event_rec)
|
|
{
|
|
unsigned char cmd = event_rec[1];
|
|
unsigned int parm = *(int *) &event_rec[4];
|
|
|
|
if (seq_mode == SEQ_2)
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
|
|
wake_up(&seq_sleeper);
|
|
return ret;
|
|
}
|
|
switch (cmd)
|
|
{
|
|
case TMR_WAIT_REL:
|
|
parm += prev_event_time;
|
|
|
|
/*
|
|
* NOTE! No break here. Execution of TMR_WAIT_REL continues in the
|
|
* next case (TMR_WAIT_ABS)
|
|
*/
|
|
|
|
case TMR_WAIT_ABS:
|
|
if (parm > 0)
|
|
{
|
|
long time;
|
|
|
|
time = parm;
|
|
prev_event_time = time;
|
|
|
|
seq_playing = 1;
|
|
request_sound_timer(time);
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
|
|
wake_up(&seq_sleeper);
|
|
return TIMER_ARMED;
|
|
}
|
|
break;
|
|
|
|
case TMR_START:
|
|
seq_time = jiffies;
|
|
prev_input_time = 0;
|
|
prev_event_time = 0;
|
|
break;
|
|
|
|
case TMR_STOP:
|
|
break;
|
|
|
|
case TMR_CONTINUE:
|
|
break;
|
|
|
|
case TMR_TEMPO:
|
|
break;
|
|
|
|
case TMR_ECHO:
|
|
if (seq_mode == SEQ_2)
|
|
seq_copy_to_input(event_rec, 8);
|
|
else
|
|
{
|
|
parm = (parm << 8 | SEQ_ECHO);
|
|
seq_copy_to_input((unsigned char *) &parm, 4);
|
|
}
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
|
|
return TIMER_NOT_ARMED;
|
|
}
|
|
|
|
static void seq_local_event(unsigned char *event_rec)
|
|
{
|
|
unsigned char cmd = event_rec[1];
|
|
unsigned int parm = *((unsigned int *) &event_rec[4]);
|
|
|
|
switch (cmd)
|
|
{
|
|
case LOCL_STARTAUDIO:
|
|
DMAbuf_start_devices(parm);
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
}
|
|
|
|
static void seq_sysex_message(unsigned char *event_rec)
|
|
{
|
|
unsigned int dev = event_rec[1];
|
|
int i, l = 0;
|
|
unsigned char *buf = &event_rec[2];
|
|
|
|
if (dev > max_synthdev)
|
|
return;
|
|
if (!(synth_open_mask & (1 << dev)))
|
|
return;
|
|
if (!synth_devs[dev])
|
|
return;
|
|
|
|
l = 0;
|
|
for (i = 0; i < 6 && buf[i] != 0xff; i++)
|
|
l = i + 1;
|
|
|
|
if (!synth_devs[dev]->send_sysex)
|
|
return;
|
|
if (l > 0)
|
|
synth_devs[dev]->send_sysex(dev, buf, l);
|
|
}
|
|
|
|
static int play_event(unsigned char *q)
|
|
{
|
|
/*
|
|
* NOTE! This routine returns
|
|
* 0 = normal event played.
|
|
* 1 = Timer armed. Suspend playback until timer callback.
|
|
* 2 = MIDI output buffer full. Restore queue and suspend until timer
|
|
*/
|
|
unsigned int *delay;
|
|
|
|
switch (q[0])
|
|
{
|
|
case SEQ_NOTEOFF:
|
|
if (synth_open_mask & (1 << 0))
|
|
if (synth_devs[0])
|
|
synth_devs[0]->kill_note(0, q[1], 255, q[3]);
|
|
break;
|
|
|
|
case SEQ_NOTEON:
|
|
if (q[4] < 128 || q[4] == 255)
|
|
if (synth_open_mask & (1 << 0))
|
|
if (synth_devs[0])
|
|
synth_devs[0]->start_note(0, q[1], q[2], q[3]);
|
|
break;
|
|
|
|
case SEQ_WAIT:
|
|
delay = (unsigned int *) q; /*
|
|
* Bytes 1 to 3 are containing the *
|
|
* delay in 'ticks'
|
|
*/
|
|
*delay = (*delay >> 8) & 0xffffff;
|
|
|
|
if (*delay > 0)
|
|
{
|
|
long time;
|
|
|
|
seq_playing = 1;
|
|
time = *delay;
|
|
prev_event_time = time;
|
|
|
|
request_sound_timer(time);
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
|
|
wake_up(&seq_sleeper);
|
|
/*
|
|
* The timer is now active and will reinvoke this function
|
|
* after the timer expires. Return to the caller now.
|
|
*/
|
|
return 1;
|
|
}
|
|
break;
|
|
|
|
case SEQ_PGMCHANGE:
|
|
if (synth_open_mask & (1 << 0))
|
|
if (synth_devs[0])
|
|
synth_devs[0]->set_instr(0, q[1], q[2]);
|
|
break;
|
|
|
|
case SEQ_SYNCTIMER: /*
|
|
* Reset timer
|
|
*/
|
|
seq_time = jiffies;
|
|
prev_input_time = 0;
|
|
prev_event_time = 0;
|
|
break;
|
|
|
|
case SEQ_MIDIPUTC: /*
|
|
* Put a midi character
|
|
*/
|
|
if (midi_opened[q[2]])
|
|
{
|
|
int dev;
|
|
|
|
dev = q[2];
|
|
|
|
if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
|
|
break;
|
|
|
|
if (!midi_devs[dev]->outputc(dev, q[1]))
|
|
{
|
|
/*
|
|
* Output FIFO is full. Wait one timer cycle and try again.
|
|
*/
|
|
|
|
seq_playing = 1;
|
|
request_sound_timer(-1);
|
|
return 2;
|
|
}
|
|
else
|
|
midi_written[dev] = 1;
|
|
}
|
|
break;
|
|
|
|
case SEQ_ECHO:
|
|
seq_copy_to_input(q, 4); /*
|
|
* Echo back to the process
|
|
*/
|
|
break;
|
|
|
|
case SEQ_PRIVATE:
|
|
if ((int) q[1] < max_synthdev)
|
|
synth_devs[q[1]]->hw_control(q[1], q);
|
|
break;
|
|
|
|
case SEQ_EXTENDED:
|
|
extended_event(q);
|
|
break;
|
|
|
|
case EV_CHN_VOICE:
|
|
seq_chn_voice_event(q);
|
|
break;
|
|
|
|
case EV_CHN_COMMON:
|
|
seq_chn_common_event(q);
|
|
break;
|
|
|
|
case EV_TIMING:
|
|
if (seq_timing_event(q) == TIMER_ARMED)
|
|
{
|
|
return 1;
|
|
}
|
|
break;
|
|
|
|
case EV_SEQ_LOCAL:
|
|
seq_local_event(q);
|
|
break;
|
|
|
|
case EV_SYSEX:
|
|
seq_sysex_message(q);
|
|
break;
|
|
|
|
default:;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* called also as timer in irq context */
|
|
static void seq_startplay(void)
|
|
{
|
|
int this_one, action;
|
|
unsigned long flags;
|
|
|
|
while (qlen > 0)
|
|
{
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
|
|
qlen--;
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
|
|
seq_playing = 1;
|
|
|
|
if ((action = play_event(&queue[this_one * EV_SZ])))
|
|
{ /* Suspend playback. Next timer routine invokes this routine again */
|
|
if (action == 2)
|
|
{
|
|
qlen++;
|
|
qhead = this_one;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
seq_playing = 0;
|
|
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
|
|
wake_up(&seq_sleeper);
|
|
}
|
|
|
|
static void reset_controllers(int dev, unsigned char *controller, int update_dev)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 128; i++)
|
|
controller[i] = ctrl_def_values[i];
|
|
}
|
|
|
|
static void setup_mode2(void)
|
|
{
|
|
int dev;
|
|
|
|
max_synthdev = num_synths;
|
|
|
|
for (dev = 0; dev < num_midis; dev++)
|
|
{
|
|
if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
|
|
{
|
|
synth_devs[max_synthdev++] = midi_devs[dev]->converter;
|
|
}
|
|
}
|
|
|
|
for (dev = 0; dev < max_synthdev; dev++)
|
|
{
|
|
int chn;
|
|
|
|
synth_devs[dev]->sysex_ptr = 0;
|
|
synth_devs[dev]->emulation = 0;
|
|
|
|
for (chn = 0; chn < 16; chn++)
|
|
{
|
|
synth_devs[dev]->chn_info[chn].pgm_num = 0;
|
|
reset_controllers(dev,
|
|
synth_devs[dev]->chn_info[chn].controllers,0);
|
|
synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
|
|
synth_devs[dev]->chn_info[chn].bender_range = 200;
|
|
}
|
|
}
|
|
max_mididev = 0;
|
|
seq_mode = SEQ_2;
|
|
}
|
|
|
|
int sequencer_open(int dev, struct file *file)
|
|
{
|
|
int retval, mode, i;
|
|
int level, tmp;
|
|
|
|
if (!sequencer_ok)
|
|
sequencer_init();
|
|
|
|
level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
|
|
|
|
dev = dev >> 4;
|
|
mode = translate_mode(file);
|
|
|
|
DEB(printk("sequencer_open(dev=%d)\n", dev));
|
|
|
|
if (!sequencer_ok)
|
|
{
|
|
/* printk("Sound card: sequencer not initialized\n");*/
|
|
return -ENXIO;
|
|
}
|
|
if (dev) /* Patch manager device (obsolete) */
|
|
return -ENXIO;
|
|
|
|
if(synth_devs[dev] == NULL)
|
|
request_module("synth0");
|
|
|
|
if (mode == OPEN_READ)
|
|
{
|
|
if (!num_midis)
|
|
{
|
|
/*printk("Sequencer: No MIDI devices. Input not possible\n");*/
|
|
sequencer_busy = 0;
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
if (sequencer_busy)
|
|
{
|
|
return -EBUSY;
|
|
}
|
|
sequencer_busy = 1;
|
|
obsolete_api_used = 0;
|
|
|
|
max_mididev = num_midis;
|
|
max_synthdev = num_synths;
|
|
pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
|
|
seq_mode = SEQ_1;
|
|
|
|
if (pending_timer != -1)
|
|
{
|
|
tmr_no = pending_timer;
|
|
pending_timer = -1;
|
|
}
|
|
if (tmr_no == -1) /* Not selected yet */
|
|
{
|
|
int i, best;
|
|
|
|
best = -1;
|
|
for (i = 0; i < num_sound_timers; i++)
|
|
if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
|
|
{
|
|
tmr_no = i;
|
|
best = sound_timer_devs[i]->priority;
|
|
}
|
|
if (tmr_no == -1) /* Should not be */
|
|
tmr_no = 0;
|
|
}
|
|
tmr = sound_timer_devs[tmr_no];
|
|
|
|
if (level == 2)
|
|
{
|
|
if (tmr == NULL)
|
|
{
|
|
/*printk("sequencer: No timer for level 2\n");*/
|
|
sequencer_busy = 0;
|
|
return -ENXIO;
|
|
}
|
|
setup_mode2();
|
|
}
|
|
if (!max_synthdev && !max_mididev)
|
|
{
|
|
sequencer_busy=0;
|
|
return -ENXIO;
|
|
}
|
|
|
|
synth_open_mask = 0;
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
{
|
|
midi_opened[i] = 0;
|
|
midi_written[i] = 0;
|
|
}
|
|
|
|
for (i = 0; i < max_synthdev; i++)
|
|
{
|
|
if (synth_devs[i]==NULL)
|
|
continue;
|
|
|
|
if (!try_module_get(synth_devs[i]->owner))
|
|
continue;
|
|
|
|
if ((tmp = synth_devs[i]->open(i, mode)) < 0)
|
|
{
|
|
printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
|
|
if (synth_devs[i]->midi_dev)
|
|
printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
|
|
}
|
|
else
|
|
{
|
|
synth_open_mask |= (1 << i);
|
|
if (synth_devs[i]->midi_dev)
|
|
midi_opened[synth_devs[i]->midi_dev] = 1;
|
|
}
|
|
}
|
|
|
|
seq_time = jiffies;
|
|
|
|
prev_input_time = 0;
|
|
prev_event_time = 0;
|
|
|
|
if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
|
|
{
|
|
/*
|
|
* Initialize midi input devices
|
|
*/
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
if (!midi_opened[i] && midi_devs[i])
|
|
{
|
|
if (!try_module_get(midi_devs[i]->owner))
|
|
continue;
|
|
|
|
if ((retval = midi_devs[i]->open(i, mode,
|
|
sequencer_midi_input, sequencer_midi_output)) >= 0)
|
|
{
|
|
midi_opened[i] = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (seq_mode == SEQ_2) {
|
|
if (try_module_get(tmr->owner))
|
|
tmr->open(tmr_no, seq_mode);
|
|
}
|
|
|
|
init_waitqueue_head(&seq_sleeper);
|
|
init_waitqueue_head(&midi_sleeper);
|
|
output_threshold = SEQ_MAX_QUEUE / 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void seq_drain_midi_queues(void)
|
|
{
|
|
int i, n;
|
|
|
|
/*
|
|
* Give the Midi drivers time to drain their output queues
|
|
*/
|
|
|
|
n = 1;
|
|
|
|
while (!signal_pending(current) && n)
|
|
{
|
|
n = 0;
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
if (midi_opened[i] && midi_written[i])
|
|
if (midi_devs[i]->buffer_status != NULL)
|
|
if (midi_devs[i]->buffer_status(i))
|
|
n++;
|
|
|
|
/*
|
|
* Let's have a delay
|
|
*/
|
|
|
|
if (n)
|
|
interruptible_sleep_on_timeout(&seq_sleeper,
|
|
HZ/10);
|
|
}
|
|
}
|
|
|
|
void sequencer_release(int dev, struct file *file)
|
|
{
|
|
int i;
|
|
int mode = translate_mode(file);
|
|
|
|
dev = dev >> 4;
|
|
|
|
DEB(printk("sequencer_release(dev=%d)\n", dev));
|
|
|
|
/*
|
|
* Wait until the queue is empty (if we don't have nonblock)
|
|
*/
|
|
|
|
if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
|
|
{
|
|
while (!signal_pending(current) && qlen > 0)
|
|
{
|
|
seq_sync();
|
|
interruptible_sleep_on_timeout(&seq_sleeper,
|
|
3*HZ);
|
|
/* Extra delay */
|
|
}
|
|
}
|
|
|
|
if (mode != OPEN_READ)
|
|
seq_drain_midi_queues(); /*
|
|
* Ensure the output queues are empty
|
|
*/
|
|
seq_reset();
|
|
if (mode != OPEN_READ)
|
|
seq_drain_midi_queues(); /*
|
|
* Flush the all notes off messages
|
|
*/
|
|
|
|
for (i = 0; i < max_synthdev; i++)
|
|
{
|
|
if (synth_open_mask & (1 << i)) /*
|
|
* Actually opened
|
|
*/
|
|
if (synth_devs[i])
|
|
{
|
|
synth_devs[i]->close(i);
|
|
|
|
module_put(synth_devs[i]->owner);
|
|
|
|
if (synth_devs[i]->midi_dev)
|
|
midi_opened[synth_devs[i]->midi_dev] = 0;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < max_mididev; i++)
|
|
{
|
|
if (midi_opened[i]) {
|
|
midi_devs[i]->close(i);
|
|
module_put(midi_devs[i]->owner);
|
|
}
|
|
}
|
|
|
|
if (seq_mode == SEQ_2) {
|
|
tmr->close(tmr_no);
|
|
module_put(tmr->owner);
|
|
}
|
|
|
|
if (obsolete_api_used)
|
|
printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
|
|
sequencer_busy = 0;
|
|
}
|
|
|
|
static int seq_sync(void)
|
|
{
|
|
if (qlen && !seq_playing && !signal_pending(current))
|
|
seq_startplay();
|
|
|
|
if (qlen > 0)
|
|
interruptible_sleep_on_timeout(&seq_sleeper, HZ);
|
|
return qlen;
|
|
}
|
|
|
|
static void midi_outc(int dev, unsigned char data)
|
|
{
|
|
/*
|
|
* NOTE! Calls sleep(). Don't call this from interrupt.
|
|
*/
|
|
|
|
int n;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* This routine sends one byte to the Midi channel.
|
|
* If the output FIFO is full, it waits until there
|
|
* is space in the queue
|
|
*/
|
|
|
|
n = 3 * HZ; /* Timeout */
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
while (n && !midi_devs[dev]->outputc(dev, data)) {
|
|
interruptible_sleep_on_timeout(&seq_sleeper, HZ/25);
|
|
n--;
|
|
}
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
}
|
|
|
|
static void seq_reset(void)
|
|
{
|
|
/*
|
|
* NOTE! Calls sleep(). Don't call this from interrupt.
|
|
*/
|
|
|
|
int i;
|
|
int chn;
|
|
unsigned long flags;
|
|
|
|
sound_stop_timer();
|
|
|
|
seq_time = jiffies;
|
|
prev_input_time = 0;
|
|
prev_event_time = 0;
|
|
|
|
qlen = qhead = qtail = 0;
|
|
iqlen = iqhead = iqtail = 0;
|
|
|
|
for (i = 0; i < max_synthdev; i++)
|
|
if (synth_open_mask & (1 << i))
|
|
if (synth_devs[i])
|
|
synth_devs[i]->reset(i);
|
|
|
|
if (seq_mode == SEQ_2)
|
|
{
|
|
for (chn = 0; chn < 16; chn++)
|
|
for (i = 0; i < max_synthdev; i++)
|
|
if (synth_open_mask & (1 << i))
|
|
if (synth_devs[i])
|
|
{
|
|
synth_devs[i]->controller(i, chn, 123, 0); /* All notes off */
|
|
synth_devs[i]->controller(i, chn, 121, 0); /* Reset all ctl */
|
|
synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
|
|
}
|
|
}
|
|
else /* seq_mode == SEQ_1 */
|
|
{
|
|
for (i = 0; i < max_mididev; i++)
|
|
if (midi_written[i]) /*
|
|
* Midi used. Some notes may still be playing
|
|
*/
|
|
{
|
|
/*
|
|
* Sending just a ACTIVE SENSING message should be enough to stop all
|
|
* playing notes. Since there are devices not recognizing the
|
|
* active sensing, we have to send some all notes off messages also.
|
|
*/
|
|
midi_outc(i, 0xfe);
|
|
|
|
for (chn = 0; chn < 16; chn++)
|
|
{
|
|
midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f))); /* control change */
|
|
midi_outc(i, 0x7b); /* All notes off */
|
|
midi_outc(i, 0); /* Dummy parameter */
|
|
}
|
|
|
|
midi_devs[i]->close(i);
|
|
|
|
midi_written[i] = 0;
|
|
midi_opened[i] = 0;
|
|
}
|
|
}
|
|
|
|
seq_playing = 0;
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
|
|
if (waitqueue_active(&seq_sleeper)) {
|
|
/* printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
|
|
wake_up(&seq_sleeper);
|
|
}
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
}
|
|
|
|
static void seq_panic(void)
|
|
{
|
|
/*
|
|
* This routine is called by the application in case the user
|
|
* wants to reset the system to the default state.
|
|
*/
|
|
|
|
seq_reset();
|
|
|
|
/*
|
|
* Since some of the devices don't recognize the active sensing and
|
|
* all notes off messages, we have to shut all notes manually.
|
|
*
|
|
* TO BE IMPLEMENTED LATER
|
|
*/
|
|
|
|
/*
|
|
* Also return the controllers to their default states
|
|
*/
|
|
}
|
|
|
|
int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
|
|
{
|
|
int midi_dev, orig_dev, val, err;
|
|
int mode = translate_mode(file);
|
|
struct synth_info inf;
|
|
struct seq_event_rec event_rec;
|
|
unsigned long flags;
|
|
int __user *p = arg;
|
|
|
|
orig_dev = dev = dev >> 4;
|
|
|
|
switch (cmd)
|
|
{
|
|
case SNDCTL_TMR_TIMEBASE:
|
|
case SNDCTL_TMR_TEMPO:
|
|
case SNDCTL_TMR_START:
|
|
case SNDCTL_TMR_STOP:
|
|
case SNDCTL_TMR_CONTINUE:
|
|
case SNDCTL_TMR_METRONOME:
|
|
case SNDCTL_TMR_SOURCE:
|
|
if (seq_mode != SEQ_2)
|
|
return -EINVAL;
|
|
return tmr->ioctl(tmr_no, cmd, arg);
|
|
|
|
case SNDCTL_TMR_SELECT:
|
|
if (seq_mode != SEQ_2)
|
|
return -EINVAL;
|
|
if (get_user(pending_timer, p))
|
|
return -EFAULT;
|
|
if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
|
|
{
|
|
pending_timer = -1;
|
|
return -EINVAL;
|
|
}
|
|
val = pending_timer;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_PANIC:
|
|
seq_panic();
|
|
return -EINVAL;
|
|
|
|
case SNDCTL_SEQ_SYNC:
|
|
if (mode == OPEN_READ)
|
|
return 0;
|
|
while (qlen > 0 && !signal_pending(current))
|
|
seq_sync();
|
|
return qlen ? -EINTR : 0;
|
|
|
|
case SNDCTL_SEQ_RESET:
|
|
seq_reset();
|
|
return 0;
|
|
|
|
case SNDCTL_SEQ_TESTMIDI:
|
|
if (__get_user(midi_dev, p))
|
|
return -EFAULT;
|
|
if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
|
|
return -ENXIO;
|
|
|
|
if (!midi_opened[midi_dev] &&
|
|
(err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
|
|
sequencer_midi_output)) < 0)
|
|
return err;
|
|
midi_opened[midi_dev] = 1;
|
|
return 0;
|
|
|
|
case SNDCTL_SEQ_GETINCOUNT:
|
|
if (mode == OPEN_WRITE)
|
|
return 0;
|
|
val = iqlen;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_GETOUTCOUNT:
|
|
if (mode == OPEN_READ)
|
|
return 0;
|
|
val = SEQ_MAX_QUEUE - qlen;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_GETTIME:
|
|
if (seq_mode == SEQ_2)
|
|
return tmr->ioctl(tmr_no, cmd, arg);
|
|
val = jiffies - seq_time;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_CTRLRATE:
|
|
/*
|
|
* If *arg == 0, just return the current rate
|
|
*/
|
|
if (seq_mode == SEQ_2)
|
|
return tmr->ioctl(tmr_no, cmd, arg);
|
|
|
|
if (get_user(val, p))
|
|
return -EFAULT;
|
|
if (val != 0)
|
|
return -EINVAL;
|
|
val = HZ;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_RESETSAMPLES:
|
|
case SNDCTL_SYNTH_REMOVESAMPLE:
|
|
case SNDCTL_SYNTH_CONTROL:
|
|
if (get_user(dev, p))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
|
|
return -EBUSY;
|
|
return synth_devs[dev]->ioctl(dev, cmd, arg);
|
|
|
|
case SNDCTL_SEQ_NRSYNTHS:
|
|
val = max_synthdev;
|
|
break;
|
|
|
|
case SNDCTL_SEQ_NRMIDIS:
|
|
val = max_mididev;
|
|
break;
|
|
|
|
case SNDCTL_SYNTH_MEMAVL:
|
|
if (get_user(dev, p))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
|
|
return -EBUSY;
|
|
val = synth_devs[dev]->ioctl(dev, cmd, arg);
|
|
break;
|
|
|
|
case SNDCTL_FM_4OP_ENABLE:
|
|
if (get_user(dev, p))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << dev)))
|
|
return -ENXIO;
|
|
synth_devs[dev]->ioctl(dev, cmd, arg);
|
|
return 0;
|
|
|
|
case SNDCTL_SYNTH_INFO:
|
|
if (get_user(dev, &((struct synth_info __user *)arg)->device))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= max_synthdev)
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
|
|
return -EBUSY;
|
|
return synth_devs[dev]->ioctl(dev, cmd, arg);
|
|
|
|
/* Like SYNTH_INFO but returns ID in the name field */
|
|
case SNDCTL_SYNTH_ID:
|
|
if (get_user(dev, &((struct synth_info __user *)arg)->device))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= max_synthdev)
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << dev)) && !orig_dev)
|
|
return -EBUSY;
|
|
memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
|
|
strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
|
|
inf.device = dev;
|
|
return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
|
|
|
|
case SNDCTL_SEQ_OUTOFBAND:
|
|
if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
|
|
return -EFAULT;
|
|
spin_lock_irqsave(&lock,flags);
|
|
play_event(event_rec.arr);
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
return 0;
|
|
|
|
case SNDCTL_MIDI_INFO:
|
|
if (get_user(dev, &((struct midi_info __user *)arg)->device))
|
|
return -EFAULT;
|
|
if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
|
|
return -ENXIO;
|
|
midi_devs[dev]->info.device = dev;
|
|
return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
|
|
|
|
case SNDCTL_SEQ_THRESHOLD:
|
|
if (get_user(val, p))
|
|
return -EFAULT;
|
|
if (val < 1)
|
|
val = 1;
|
|
if (val >= SEQ_MAX_QUEUE)
|
|
val = SEQ_MAX_QUEUE - 1;
|
|
output_threshold = val;
|
|
return 0;
|
|
|
|
case SNDCTL_MIDI_PRETIME:
|
|
if (get_user(val, p))
|
|
return -EFAULT;
|
|
if (val < 0)
|
|
val = 0;
|
|
val = (HZ * val) / 10;
|
|
pre_event_timeout = val;
|
|
break;
|
|
|
|
default:
|
|
if (mode == OPEN_READ)
|
|
return -EIO;
|
|
if (!synth_devs[0])
|
|
return -ENXIO;
|
|
if (!(synth_open_mask & (1 << 0)))
|
|
return -ENXIO;
|
|
if (!synth_devs[0]->ioctl)
|
|
return -EINVAL;
|
|
return synth_devs[0]->ioctl(0, cmd, arg);
|
|
}
|
|
return put_user(val, p);
|
|
}
|
|
|
|
/* No kernel lock - we're using the global irq lock here */
|
|
unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int mask = 0;
|
|
|
|
dev = dev >> 4;
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
/* input */
|
|
poll_wait(file, &midi_sleeper, wait);
|
|
if (iqlen)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
/* output */
|
|
poll_wait(file, &seq_sleeper, wait);
|
|
if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
return mask;
|
|
}
|
|
|
|
|
|
void sequencer_timer(unsigned long dummy)
|
|
{
|
|
seq_startplay();
|
|
}
|
|
EXPORT_SYMBOL(sequencer_timer);
|
|
|
|
int note_to_freq(int note_num)
|
|
{
|
|
|
|
/*
|
|
* This routine converts a midi note to a frequency (multiplied by 1000)
|
|
*/
|
|
|
|
int note, octave, note_freq;
|
|
static int notes[] =
|
|
{
|
|
261632, 277189, 293671, 311132, 329632, 349232,
|
|
369998, 391998, 415306, 440000, 466162, 493880
|
|
};
|
|
|
|
#define BASE_OCTAVE 5
|
|
|
|
octave = note_num / 12;
|
|
note = note_num % 12;
|
|
|
|
note_freq = notes[note];
|
|
|
|
if (octave < BASE_OCTAVE)
|
|
note_freq >>= (BASE_OCTAVE - octave);
|
|
else if (octave > BASE_OCTAVE)
|
|
note_freq <<= (octave - BASE_OCTAVE);
|
|
|
|
/*
|
|
* note_freq >>= 1;
|
|
*/
|
|
|
|
return note_freq;
|
|
}
|
|
EXPORT_SYMBOL(note_to_freq);
|
|
|
|
unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
|
|
int vibrato_cents)
|
|
{
|
|
unsigned long amount;
|
|
int negative, semitones, cents, multiplier = 1;
|
|
|
|
if (!bend)
|
|
return base_freq;
|
|
if (!range)
|
|
return base_freq;
|
|
|
|
if (!base_freq)
|
|
return base_freq;
|
|
|
|
if (range >= 8192)
|
|
range = 8192;
|
|
|
|
bend = bend * range / 8192; /* Convert to cents */
|
|
bend += vibrato_cents;
|
|
|
|
if (!bend)
|
|
return base_freq;
|
|
|
|
negative = bend < 0 ? 1 : 0;
|
|
|
|
if (bend < 0)
|
|
bend *= -1;
|
|
if (bend > range)
|
|
bend = range;
|
|
|
|
/*
|
|
if (bend > 2399)
|
|
bend = 2399;
|
|
*/
|
|
while (bend > 2399)
|
|
{
|
|
multiplier *= 4;
|
|
bend -= 2400;
|
|
}
|
|
|
|
semitones = bend / 100;
|
|
if (semitones > 99)
|
|
semitones = 99;
|
|
cents = bend % 100;
|
|
|
|
amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
|
|
|
|
if (negative)
|
|
return (base_freq * 10000) / amount; /* Bend down */
|
|
else
|
|
return (base_freq * amount) / 10000; /* Bend up */
|
|
}
|
|
EXPORT_SYMBOL(compute_finetune);
|
|
|
|
void sequencer_init(void)
|
|
{
|
|
if (sequencer_ok)
|
|
return;
|
|
queue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * EV_SZ);
|
|
if (queue == NULL)
|
|
{
|
|
printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
|
|
return;
|
|
}
|
|
iqueue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
|
|
if (iqueue == NULL)
|
|
{
|
|
printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
|
|
vfree(queue);
|
|
return;
|
|
}
|
|
sequencer_ok = 1;
|
|
}
|
|
EXPORT_SYMBOL(sequencer_init);
|
|
|
|
void sequencer_unload(void)
|
|
{
|
|
vfree(queue);
|
|
vfree(iqueue);
|
|
queue = iqueue = NULL;
|
|
}
|