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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Philipp Pertermann
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP
#ifndef SIMULATOR /* don't want this code in the simulator */
#if CONFIG_CODEC != SWCODEC /* only for MAS-targets */
/* The different drawing modes */
#define DRAW_MODE_FILLED 0
#define DRAW_MODE_OUTLINE 1
#define DRAW_MODE_PIXEL 2
#define DRAW_MODE_COUNT 3
#define MAX_PEAK 0x8000
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define OSCILLOGRAPH_QUIT BUTTON_OFF
#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
#define OSCILLOGRAPH_ROLL BUTTON_F1
#define OSCILLOGRAPH_MODE BUTTON_F2
#define OSCILLOGRAPH_SPEED_RESET BUTTON_F3
#define OSCILLOGRAPH_PAUSE BUTTON_PLAY
#elif CONFIG_KEYPAD == ONDIO_PAD
#define OSCILLOGRAPH_QUIT BUTTON_OFF
#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
#define OSCILLOGRAPH_ROLL BUTTON_RIGHT
#define OSCILLOGRAPH_MODE BUTTON_MENU
#define OSCILLOGRAPH_SPEED_RESET BUTTON_LEFT
#endif
/* global api struct pointer */
static struct plugin_api* rb;
/* number of ticks between two volume samples */
static int speed = 1;
/* roll == true -> lcd rolls */
static bool roll = true;
/* see DRAW_MODE_XXX constants for valid values */
static int drawMode = DRAW_MODE_FILLED;
/**
* cleanup on return / usb
*/
void cleanup(void *parameter)
{
(void)parameter;
/* restore to default roll position.
Looks funny if you forget to do this... */
rb->lcd_roll(0);
rb->lcd_update();
}
/**
* Displays a vertically scrolling oscillosgraph using
* hardware scrolling of the display. The user can change
* speed
*/
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
int button;
/* stores current volume value left */
int left;
/* stores current volume value right */
int right;
/* specifies the current position on the lcd */
int y = LCD_WIDTH - 1;
/* only needed when drawing lines */
int lastLeft = 0;
int lastRight = 0;
int lasty = 0;
bool exit = false;
TEST_PLUGIN_API(api);
(void)parameter;
rb = api;
/* the main loop */
while (!exit) {
/* read the volume info from MAS */
left = rb->mas_codec_readreg(0xC) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
right = rb->mas_codec_readreg(0xD) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
/* delete current line */
rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
rb->lcd_drawline(0, y, LCD_WIDTH-1, y);
rb->lcd_set_drawmode(DRMODE_SOLID);
switch (drawMode) {
case DRAW_MODE_FILLED:
rb->lcd_drawline(LCD_WIDTH / 2 + 1 , y,
LCD_WIDTH / 2 + 1 + right, y);
rb->lcd_drawline(LCD_WIDTH / 2 - 1 , y,
LCD_WIDTH / 2 - 1 -left , y);
break;
case DRAW_MODE_OUTLINE:
/* last position needed for lines */
lasty = MAX(y-1, 0);
/* Here real lines were neccessary because
anything else was ugly. */
rb->lcd_drawline(LCD_WIDTH / 2 + right , y,
LCD_WIDTH / 2 + lastRight , lasty);
rb->lcd_drawline(LCD_WIDTH / 2 - left , y,
LCD_WIDTH / 2 - lastLeft, lasty);
/* have to store the old values for drawing lines
the next time */
lastRight = right;
lastLeft = left;
break;
case DRAW_MODE_PIXEL:
/* straight and simple */
rb->lcd_drawpixel(LCD_WIDTH / 2 + right, y);
rb->lcd_drawpixel(LCD_WIDTH / 2 - left, y);
break;
}
/* increment and adjust the drawing position */
y++;
if (y >= LCD_HEIGHT)
y = 0;
/* I roll before update because otherwise the new
line would appear at the wrong end of the display */
if (roll)
rb->lcd_roll(y);
/* now finally make the new sample visible */
rb->lcd_update_rect(0, MAX(y-1, 0), LCD_WIDTH, 2);
/* There are two mechanisms to alter speed:
1.) slowing down is achieved by increasing
the time waiting for user input. This
mechanism uses positive values.
2.) speeding up is achieved by leaving out
the user input check for (-speed) volume
samples. For this mechanism negative values
are used.
*/
if (speed >= 0 || ((speed < 0) && (y % (-speed) == 0))) {
bool draw = false;
/* speed values > 0 slow the oszi down. By user input
speed might become < 1. If a value < 1 was
passed user input would be disabled. Thus
it must be ensured that at least 1 is passed. */
/* react to user input */
button = rb->button_get_w_tmo(MAX(speed, 1));
switch (button) {
case OSCILLOGRAPH_SPEED_UP:
speed++;
draw = true;
break;
case OSCILLOGRAPH_SPEED_DOWN:
speed--;
draw = true;
break;
#ifdef OSCILLOGRAPH_PAUSE
case OSCILLOGRAPH_PAUSE:
/* pause the demo */
rb->button_get(true);
break;
#endif
case OSCILLOGRAPH_ROLL:
/* toggle rolling */
roll = !roll;
break;
case OSCILLOGRAPH_MODE:
/* step through the display modes */
drawMode ++;
drawMode = drawMode % DRAW_MODE_COUNT;
/* lcd buffer might be rolled so that
the transition from LCD_HEIGHT to 0
takes place in the middle of the screen.
That produces ugly results in DRAW_MODE_OUTLINE
mode. If rolling is enabled this change will
be reverted before the next update anyway.*/
rb->lcd_roll(0);
break;
case OSCILLOGRAPH_SPEED_RESET:
speed = 1;
draw = true;
break;
case OSCILLOGRAPH_QUIT:
exit = true;
break;
default:
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
break;
}
if (draw) {
char buf[16];
rb->snprintf(buf, sizeof buf, "Speed: %d", -speed);
rb->lcd_putsxy(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT, buf);
rb->lcd_update_rect(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT,
LCD_WIDTH, 8);
}
}
}
cleanup(NULL);
/* standard return */
return PLUGIN_OK;
}
#endif /* if using MAS */
#endif /* #ifndef SIMULATOR */
#endif
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