e35a658ded
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5304 a1c6a512-1295-4272-9138-f99709370657
245 lines
7.8 KiB
C
245 lines
7.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Philipp Pertermann
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP
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#ifndef SIMULATOR /* don't want this code in the simulator */
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/* The different drawing modes */
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#define DRAW_MODE_FILLED 0
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#define DRAW_MODE_OUTLINE 1
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#define DRAW_MODE_PIXEL 2
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#define DRAW_MODE_COUNT 3
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#define MAX_PEAK 0x8000
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/* variable button definitions */
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#if CONFIG_KEYPAD == RECORDER_PAD
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#define OSCILLOGRAPH_QUIT BUTTON_OFF
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#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
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#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
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#define OSCILLOGRAPH_ROLL BUTTON_F1
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#define OSCILLOGRAPH_MODE BUTTON_F2
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#define OSCILLOGRAPH_SPEED_RESET BUTTON_F3
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#define OSCILLOGRAPH_PAUSE BUTTON_PLAY
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#elif CONFIG_KEYPAD == ONDIO_PAD
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#define OSCILLOGRAPH_QUIT BUTTON_OFF
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#define OSCILLOGRAPH_SPEED_UP BUTTON_UP
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#define OSCILLOGRAPH_SPEED_DOWN BUTTON_DOWN
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#define OSCILLOGRAPH_ROLL BUTTON_RIGHT
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#define OSCILLOGRAPH_MODE BUTTON_MENU
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#define OSCILLOGRAPH_SPEED_RESET BUTTON_LEFT
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#endif
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/* global api struct pointer */
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static struct plugin_api* rb;
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/* number of ticks between two volume samples */
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static int speed = 1;
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/* roll == true -> lcd rolls */
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static bool roll = true;
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/* see DRAW_MODE_XXX constants for valid values */
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static int drawMode = DRAW_MODE_FILLED;
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/**
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* cleanup on return / usb
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*/
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void cleanup(void *parameter)
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{
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(void)parameter;
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/* restore to default roll position.
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Looks funny if you forget to do this... */
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rb->lcd_roll(0);
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rb->lcd_update();
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}
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/**
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* Displays a vertically scrolling oscillosgraph using
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* hardware scrolling of the display. The user can change
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* speed
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*/
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enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
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{
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int button;
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/* stores current volume value left */
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int left;
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/* stores current volume value right */
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int right;
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/* specifies the current position on the lcd */
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int y = LCD_WIDTH - 1;
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/* only needed when drawing lines */
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int lastLeft = 0;
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int lastRight = 0;
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int lasty = 0;
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bool exit = false;
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TEST_PLUGIN_API(api);
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(void)parameter;
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rb = api;
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/* the main loop */
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while (!exit) {
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/* read the volume info from MAS */
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left = rb->mas_codec_readreg(0xC) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
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right = rb->mas_codec_readreg(0xD) / (MAX_PEAK / (LCD_WIDTH / 2 - 2));
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/* delete current line */
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rb->lcd_clearline(0, y, LCD_WIDTH-1, y);
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switch (drawMode) {
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case DRAW_MODE_FILLED:
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rb->lcd_drawline(LCD_WIDTH / 2 + 1 , y,
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LCD_WIDTH / 2 + 1 + right, y);
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rb->lcd_drawline(LCD_WIDTH / 2 - 1 , y,
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LCD_WIDTH / 2 - 1 -left , y);
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break;
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case DRAW_MODE_OUTLINE:
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/* last position needed for lines */
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lasty = MAX(y-1, 0);
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/* Here real lines were neccessary because
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anything else was ugly. */
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rb->lcd_drawline(LCD_WIDTH / 2 + right , y,
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LCD_WIDTH / 2 + lastRight , lasty);
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rb->lcd_drawline(LCD_WIDTH / 2 - left , y,
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LCD_WIDTH / 2 - lastLeft, lasty);
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/* have to store the old values for drawing lines
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the next time */
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lastRight = right;
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lastLeft = left;
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break;
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case DRAW_MODE_PIXEL:
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/* straight and simple */
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rb->lcd_drawpixel(LCD_WIDTH / 2 + right, y);
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rb->lcd_drawpixel(LCD_WIDTH / 2 - left, y);
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break;
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}
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/* increment and adjust the drawing position */
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y++;
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if (y >= LCD_HEIGHT)
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y = 0;
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/* I roll before update because otherwise the new
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line would appear at the wrong end of the display */
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if (roll)
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rb->lcd_roll(y);
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/* now finally make the new sample visible */
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rb->lcd_update_rect(0, MAX(y-1, 0), LCD_WIDTH, 2);
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/* There are two mechanisms to alter speed:
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1.) slowing down is achieved by increasing
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the time waiting for user input. This
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mechanism uses positive values.
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2.) speeding up is achieved by leaving out
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the user input check for (-speed) volume
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samples. For this mechanism negative values
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are used.
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*/
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if (speed >= 0 || ((speed < 0) && (y % (-speed) == 0))) {
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bool draw = false;
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/* speed values > 0 slow the oszi down. By user input
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speed might become < 1. If a value < 1 was
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passed user input would be disabled. Thus
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it must be ensured that at least 1 is passed. */
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/* react to user input */
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button = rb->button_get_w_tmo(MAX(speed, 1));
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switch (button) {
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case OSCILLOGRAPH_SPEED_UP:
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speed++;
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draw = true;
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break;
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case OSCILLOGRAPH_SPEED_DOWN:
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speed--;
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draw = true;
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break;
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#ifdef OSCILLOGRAPH_PAUSE
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case OSCILLOGRAPH_PAUSE:
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/* pause the demo */
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rb->button_get(true);
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break;
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#endif
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case OSCILLOGRAPH_ROLL:
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/* toggle rolling */
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roll = !roll;
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break;
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case OSCILLOGRAPH_MODE:
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/* step through the display modes */
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drawMode ++;
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drawMode = drawMode % DRAW_MODE_COUNT;
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/* lcd buffer might be rolled so that
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the transition from LCD_HEIGHT to 0
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takes place in the middle of the screen.
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That produces ugly results in DRAW_MODE_OUTLINE
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mode. If rolling is enabled this change will
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be reverted before the next update anyway.*/
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rb->lcd_roll(0);
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break;
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case OSCILLOGRAPH_SPEED_RESET:
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speed = 1;
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draw = true;
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break;
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case OSCILLOGRAPH_QUIT:
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exit = true;
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break;
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default:
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if (rb->default_event_handler_ex(button, cleanup, NULL)
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== SYS_USB_CONNECTED)
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return PLUGIN_USB_CONNECTED;
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break;
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}
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if (draw) {
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char buf[16];
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rb->snprintf(buf, sizeof buf, "Speed: %d", -speed);
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rb->lcd_putsxy(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT, buf);
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rb->lcd_update_rect(0, (y + LCD_HEIGHT - 8) % LCD_HEIGHT,
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LCD_WIDTH, 8);
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}
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}
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}
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cleanup(NULL);
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/* standard return */
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return PLUGIN_OK;
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}
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#endif /* #ifndef SIMULATOR */
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#endif
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