Quelle  speakup_decext.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+
/*
 * originally written by: Kirk Reiser <kirk@braille.uwo.ca>
 * this version considerably modified by David Borowski, david575@rogers.com
 *
 * Copyright (C) 1998-99  Kirk Reiser.
 * Copyright (C) 2003 David Borowski.
 *
 * specifically written as a driver for the speakup screenreview
 * s not a general device driver.
 */
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kthread.h>

#include "spk_priv.h"
#include "speakup.h"

#define DRV_VERSION "2.14"
#define SYNTH_CLEAR 0x03
#define PROCSPEECH 0x0b

static volatile unsigned char last_char;

static void read_buff_add(u_char ch)
{
 last_char = ch;
}

static inline bool synth_full(void)
{
 return last_char == 0x13;
}

static void do_catch_up(struct spk_synth *synth);
static void synth_flush(struct spk_synth *synth);

static int in_escape;


enum default_vars_id {
 CAPS_START_ID = 0, CAPS_STOP_ID,
 RATE_ID, PITCH_ID, INFLECTION_ID,
 VOL_ID, PUNCT_ID, VOICE_ID,
 DIRECT_ID, V_LAST_ID,
 NB_ID,
};

static struct var_t vars[NB_ID] = {
 [CAPS_START_ID] = { CAPS_START, .u.s = {"[:dv ap 222]" } },
 [CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"[:dv ap 100]" } },
 [RATE_ID] = { RATE, .u.n = {"[:ra %d]", 7, 0, 9, 150, 25, NULL } },
 [PITCH_ID] = { PITCH, .u.n = {"[:dv ap %d]", 100, 0, 100, 0, 0, NULL } },
 [INFLECTION_ID] = { INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },
 [VOL_ID] = { VOL, .u.n = {"[:dv gv %d]", 13, 0, 16, 0, 5, NULL } },
 [PUNCT_ID] = { PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } },
 [VOICE_ID] = { VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } },
 [DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
 V_LAST_VAR
};

/*
 * These attributes will appear in /sys/accessibility/speakup/decext.
 */
static struct kobj_attribute caps_start_attribute =
 __ATTR(caps_start, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute caps_stop_attribute =
 __ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute pitch_attribute =
 __ATTR(pitch, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute inflection_attribute =
 __ATTR(inflection, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute punct_attribute =
 __ATTR(punct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute rate_attribute =
 __ATTR(rate, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute voice_attribute =
 __ATTR(voice, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute vol_attribute =
 __ATTR(vol, 0644, spk_var_show, spk_var_store);

static struct kobj_attribute delay_time_attribute =
 __ATTR(delay_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute direct_attribute =
 __ATTR(direct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute full_time_attribute =
 __ATTR(full_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute jiffy_delta_attribute =
 __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute trigger_time_attribute =
 __ATTR(trigger_time, 0644, spk_var_show, spk_var_store);

/*
 * Create a group of attributes so that we can create and destroy them all
 * at once.
 */
static struct attribute *synth_attrs[] = {
 &caps_start_attribute.attr,
 &caps_stop_attribute.attr,
 &pitch_attribute.attr,
 &inflection_attribute.attr,
 &punct_attribute.attr,
 &rate_attribute.attr,
 &voice_attribute.attr,
 &vol_attribute.attr,
 &delay_time_attribute.attr,
 &direct_attribute.attr,
 &full_time_attribute.attr,
 &jiffy_delta_attribute.attr,
 &trigger_time_attribute.attr,
 NULL, /* need to NULL terminate the list of attributes */
};

static struct spk_synth synth_decext = {
 .name = "decext",
 .version = DRV_VERSION,
 .long_name = "Dectalk External",
 .init = "[:pe -380]",
 .procspeech = PROCSPEECH,
 .clear = SYNTH_CLEAR,
 .delay = 500,
 .trigger = 50,
 .jiffies = 50,
 .full = 40000,
 .flags = SF_DEC,
 .dev_name = SYNTH_DEFAULT_DEV,
 .startup = SYNTH_START,
 .checkval = SYNTH_CHECK,
 .vars = vars,
 .io_ops = &spk_ttyio_ops,
 .probe = spk_ttyio_synth_probe,
 .release = spk_ttyio_release,
 .synth_immediate = spk_ttyio_synth_immediate,
 .catch_up = do_catch_up,
 .flush = synth_flush,
 .is_alive = spk_synth_is_alive_restart,
 .synth_adjust = NULL,
 .read_buff_add = read_buff_add,
 .get_index = NULL,
 .indexing = {
  .command = NULL,
  .lowindex = 0,
  .highindex = 0,
  .currindex = 0,
 },
 .attributes = {
  .attrs = synth_attrs,
  .name = "decext",
 },
};

static void do_catch_up(struct spk_synth *synth)
{
 u_char ch;
 static u_char last = '\0';
 unsigned long flags;
 unsigned long jiff_max;
 struct var_t *jiffy_delta;
 struct var_t *delay_time;
 int jiffy_delta_val = 0;
 int delay_time_val = 0;

 jiffy_delta = spk_get_var(JIFFY);
 delay_time = spk_get_var(DELAY);

 spin_lock_irqsave(&speakup_info.spinlock, flags);
 jiffy_delta_val = jiffy_delta->u.n.value;
 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 jiff_max = jiffies + jiffy_delta_val;

 while (!kthread_should_stop()) {
  spin_lock_irqsave(&speakup_info.spinlock, flags);
  if (speakup_info.flushing) {
   speakup_info.flushing = 0;
   spin_unlock_irqrestore(&speakup_info.spinlock, flags);
   synth->flush(synth);
   continue;
  }
  synth_buffer_skip_nonlatin1();
  if (synth_buffer_empty()) {
   spin_unlock_irqrestore(&speakup_info.spinlock, flags);
   break;
  }
  ch = synth_buffer_peek();
  set_current_state(TASK_INTERRUPTIBLE);
  delay_time_val = delay_time->u.n.value;
  spin_unlock_irqrestore(&speakup_info.spinlock, flags);
  if (ch == '\n')
   ch = 0x0D;
  if (synth_full() || !synth->io_ops->synth_out(synth, ch)) {
   schedule_timeout(msecs_to_jiffies(delay_time_val));
   continue;
  }
  set_current_state(TASK_RUNNING);
  spin_lock_irqsave(&speakup_info.spinlock, flags);
  synth_buffer_getc();
  spin_unlock_irqrestore(&speakup_info.spinlock, flags);
  if (ch == '[') {
   in_escape = 1;
  } else if (ch == ']') {
   in_escape = 0;
  } else if (ch <= SPACE) {
   if (!in_escape && strchr(",.!?;:", last))
    synth->io_ops->synth_out(synth, PROCSPEECH);
   if (time_after_eq(jiffies, jiff_max)) {
    if (!in_escape)
     synth->io_ops->synth_out(synth,
         PROCSPEECH);
    spin_lock_irqsave(&speakup_info.spinlock,
        flags);
    jiffy_delta_val = jiffy_delta->u.n.value;
    delay_time_val = delay_time->u.n.value;
    spin_unlock_irqrestore(&speakup_info.spinlock,
             flags);
    schedule_timeout(msecs_to_jiffies
       (delay_time_val));
    jiff_max = jiffies + jiffy_delta_val;
   }
  }
  last = ch;
 }
 if (!in_escape)
  synth->io_ops->synth_out(synth, PROCSPEECH);
}

static void synth_flush(struct spk_synth *synth)
{
 in_escape = 0;
 synth->io_ops->flush_buffer(synth);
 synth->synth_immediate(synth, "\033P;10z\033\\");
}

module_param_named(ser, synth_decext.ser, int, 0444);
module_param_named(dev, synth_decext.dev_name, charp, 0444);
module_param_named(start, synth_decext.startup, short, 0444);
module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
module_param_named(inflection, vars[INFLECTION_ID].u.n.default_val, int, 0444);
module_param_named(vol, vars[VOL_ID].u.n.default_val, int, 0444);
module_param_named(punct, vars[PUNCT_ID].u.n.default_val, int, 0444);
module_param_named(voice, vars[VOICE_ID].u.n.default_val, int, 0444);
module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);


MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
MODULE_PARM_DESC(rate, "Set the rate variable on load.");
MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
MODULE_PARM_DESC(inflection, "Set the inflection variable on load.");
MODULE_PARM_DESC(vol, "Set the vol variable on load.");
MODULE_PARM_DESC(punct, "Set the punct variable on load.");
MODULE_PARM_DESC(voice, "Set the voice variable on load.");
MODULE_PARM_DESC(direct, "Set the direct variable on load.");

module_spk_synth(synth_decext);

MODULE_AUTHOR("Kirk Reiser ");
MODULE_AUTHOR("David Borowski");
MODULE_DESCRIPTION("Speakup support for DECtalk External synthesizers");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);