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rockbox/firmware/scroll_engine.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Michael Sevakis
*
* LCD scrolling driver and scheduler
*
* Much collected and combined from the various Rockbox LCD drivers.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "usb.h"
#include "lcd.h"
#include "font.h"
#ifdef HAVE_REMOTE_LCD
#include "lcd-remote.h"
#endif
#include "scroll_engine.h"
static const char scroll_tick_table[16] = {
/* Hz values:
1, 1.25, 1.55, 2, 2.5, 3.12, 4, 5, 6.25, 8.33, 10, 12.5, 16.7, 20, 25, 33 */
100, 80, 64, 50, 40, 32, 25, 20, 16, 12, 10, 8, 6, 5, 4, 3
};
static void scroll_thread(void);
static char scroll_stack[DEFAULT_STACK_SIZE*3];
static const char scroll_name[] = "scroll";
static struct scrollinfo lcd_scroll[LCD_SCROLLABLE_LINES];
#ifdef HAVE_REMOTE_LCD
struct scrollinfo lcd_remote_scroll[LCD_REMOTE_SCROLLABLE_LINES];
struct event_queue scroll_queue;
#endif
struct scroll_screen_info lcd_scroll_info =
{
.scroll = lcd_scroll,
.lines = 0,
.ticks = 12,
.delay = HZ/2,
.bidir_limit = 50,
#ifdef HAVE_LCD_BITMAP
.step = 6,
#endif
#ifdef HAVE_LCD_CHARCELLS
.jump_scroll_delay = HZ/4,
.jump_scroll = 0,
#endif
};
#ifdef HAVE_REMOTE_LCD
struct scroll_screen_info lcd_remote_scroll_info =
{
.scroll = lcd_remote_scroll,
.lines = 0,
.ticks = 12,
.delay = HZ/2,
.bidir_limit = 50,
.step = 6,
};
#endif /* HAVE_REMOTE_LCD */
void lcd_stop_scroll(void)
{
lcd_scroll_info.lines = 0;
}
/* Stop scrolling line y in the specified viewport, or all lines if y < 0 */
void lcd_scroll_stop_line(const struct viewport* current_vp, int y)
{
int i = 0;
while (i < lcd_scroll_info.lines)
{
if ((lcd_scroll_info.scroll[i].vp == current_vp) &&
((y < 0) || (lcd_scroll_info.scroll[i].y == y)))
{
/* If i is not the last active line in the array, then move
the last item to position i */
if ((i + 1) != lcd_scroll_info.lines)
{
lcd_scroll_info.scroll[i] =
lcd_scroll_info.scroll[lcd_scroll_info.lines-1];
}
lcd_scroll_info.lines--;
/* A line can only appear once, so we're done,
* unless we are clearing the whole viewport */
if (y >= 0)
return ;
}
else
{
i++;
}
}
}
/* Stop all scrolling lines in the specified viewport */
void lcd_scroll_stop(const struct viewport* vp)
{
lcd_scroll_stop_line(vp, -1);
}
void lcd_scroll_speed(int speed)
{
lcd_scroll_info.ticks = scroll_tick_table[speed];
}
#if defined(HAVE_LCD_BITMAP)
void lcd_scroll_step(int step)
{
lcd_scroll_info.step = step;
}
#endif
void lcd_scroll_delay(int ms)
{
lcd_scroll_info.delay = ms / (HZ / 10);
}
void lcd_bidir_scroll(int percent)
{
lcd_scroll_info.bidir_limit = percent;
}
#ifdef HAVE_LCD_CHARCELLS
void lcd_jump_scroll(int mode) /* 0=off, 1=once, ..., JUMP_SCROLL_ALWAYS */
{
lcd_scroll_info.jump_scroll = mode;
}
void lcd_jump_scroll_delay(int ms)
{
lcd_scroll_info.jump_scroll_delay = ms / (HZ / 10);
}
#endif
#ifdef HAVE_REMOTE_LCD
void lcd_remote_stop_scroll(void)
{
lcd_remote_scroll_info.lines = 0;
}
/* Stop scrolling line y in the specified viewport, or all lines if y < 0 */
void lcd_remote_scroll_stop_line(const struct viewport* current_vp, int y)
{
int i = 0;
while (i < lcd_remote_scroll_info.lines)
{
if ((lcd_remote_scroll_info.scroll[i].vp == current_vp) &&
((y < 0) || (lcd_remote_scroll_info.scroll[i].y == y)))
{
/* If i is not the last active line in the array, then move
the last item to position i */
if ((i + 1) != lcd_remote_scroll_info.lines)
{
lcd_remote_scroll_info.scroll[i] =
lcd_remote_scroll_info.scroll[lcd_remote_scroll_info.lines-1];
}
lcd_remote_scroll_info.lines--;
/* A line can only appear once, so we're done,
* unless we are clearing the whole viewport */
if (y >= 0)
return ;
}
else
{
i++;
}
}
}
/* Stop all scrolling lines in the specified viewport */
void lcd_remote_scroll_stop(const struct viewport* vp)
{
lcd_remote_scroll_stop_line(vp, -1);
}
void lcd_remote_scroll_speed(int speed)
{
lcd_remote_scroll_info.ticks = scroll_tick_table[speed];
}
void lcd_remote_scroll_step(int step)
{
lcd_remote_scroll_info.step = step;
}
void lcd_remote_scroll_delay(int ms)
{
lcd_remote_scroll_info.delay = ms / (HZ / 10);
}
void lcd_remote_bidir_scroll(int percent)
{
lcd_remote_scroll_info.bidir_limit = percent;
}
static void sync_display_ticks(void)
{
lcd_scroll_info.last_scroll =
lcd_remote_scroll_info.last_scroll = current_tick;
}
static bool scroll_process_message(int delay)
{
struct queue_event ev;
do
{
long tick = current_tick;
queue_wait_w_tmo(&scroll_queue, &ev, delay);
switch (ev.id)
{
case SYS_TIMEOUT:
return false;
case SYS_USB_CONNECTED:
usb_acknowledge(SYS_USB_CONNECTED_ACK);
usb_wait_for_disconnect(&scroll_queue);
sync_display_ticks();
return true;
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
case SYS_REMOTE_PLUGGED:
if (!remote_initialized)
sync_display_ticks();
#endif
}
delay -= current_tick - tick;
}
while (delay > 0);
return false;
}
#endif /* HAVE_REMOTE_LCD */
static void scroll_thread(void) __attribute__((noreturn));
#ifdef HAVE_REMOTE_LCD
static void scroll_thread(void)
{
enum
{
SCROLL_LCD = 0x1,
SCROLL_LCD_REMOTE = 0x2,
};
sync_display_ticks();
while ( 1 )
{
long delay;
int scroll;
long tick_lcd, tick_remote;
tick_lcd = lcd_scroll_info.last_scroll + lcd_scroll_info.ticks;
delay = current_tick;
if (
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
!remote_initialized ||
#endif
(tick_remote = lcd_remote_scroll_info.last_scroll +
lcd_remote_scroll_info.ticks,
TIME_BEFORE(tick_lcd, tick_remote)))
{
scroll = SCROLL_LCD;
delay = tick_lcd - delay;
}
/* TIME_BEFORE(tick_remote, tick_lcd) */
else if (tick_lcd != tick_remote)
{
scroll = SCROLL_LCD_REMOTE;
delay = tick_remote - delay;
}
else
{
scroll = SCROLL_LCD | SCROLL_LCD_REMOTE;
delay = tick_lcd - delay;
}
if (scroll_process_message(delay))
continue;
if (scroll & SCROLL_LCD)
{
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
if (lcd_active())
#endif
lcd_scroll_fn();
lcd_scroll_info.last_scroll = current_tick;
}
if (scroll == (SCROLL_LCD | SCROLL_LCD_REMOTE))
yield();
if (scroll & SCROLL_LCD_REMOTE)
{
lcd_remote_scroll_fn();
lcd_remote_scroll_info.last_scroll = current_tick;
}
}
}
#else
static void scroll_thread(void)
{
while (1)
{
sleep(lcd_scroll_info.ticks);
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
if (lcd_active())
#endif
lcd_scroll_fn();
}
}
#endif /* HAVE_REMOTE_LCD */
void scroll_init(void)
{
#ifdef HAVE_REMOTE_LCD
queue_init(&scroll_queue, true);
#endif
create_thread(scroll_thread, scroll_stack,
sizeof(scroll_stack), 0, scroll_name
IF_PRIO(, PRIORITY_USER_INTERFACE)
IF_COP(, CPU));
}
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