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rockbox/apps/gui/pitchscreen.c
Bertrik Sikken ab222c1705 Simplify some redundant boolean expressions 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21013 a1c6a512-1295-4272-9138-f99709370657
2009-05-21 14:15:24 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Björn Stenberg
*
* 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 <stdbool.h>
#include <string.h>
#include <stdio.h>
#include "config.h"
#include "sprintf.h"
#include "action.h"
#include "dsp.h"
#include "sound.h"
#include "pcmbuf.h"
#include "lang.h"
#include "icons.h"
#include "screens.h"
#include "viewport.h"
#include "font.h"
#include "system.h"
#include "misc.h"
#include "pitchscreen.h"
#define PITCH_MODE_ABSOLUTE 1
#define PITCH_MODE_SEMITONE -PITCH_MODE_ABSOLUTE
#define ICON_BORDER 12 /* icons are currently 7x8, so add ~2 pixels */
/* on both sides when drawing */
#define PITCH_MAX 2000
#define PITCH_MIN 500
#define PITCH_SMALL_DELTA 1
#define PITCH_BIG_DELTA 10
#define PITCH_NUDGE_DELTA 20
static int pitch_mode = PITCH_MODE_ABSOLUTE; /* 1 - absolute, -1 - semitone */
enum
{
PITCH_TOP = 0,
PITCH_MID,
PITCH_BOTTOM,
PITCH_ITEM_COUNT,
};
static void pitchscreen_fix_viewports(struct viewport *parent,
struct viewport pitch_viewports[PITCH_ITEM_COUNT])
{
int i, height;
height = font_get(parent->font)->height;
for (i = 0; i < PITCH_ITEM_COUNT; i++)
{
pitch_viewports[i] = *parent;
pitch_viewports[i].height = height;
}
pitch_viewports[PITCH_TOP].y += ICON_BORDER;
pitch_viewports[PITCH_MID].x += ICON_BORDER;
pitch_viewports[PITCH_MID].width = parent->width - ICON_BORDER*2;
pitch_viewports[PITCH_MID].height = height * 2;
pitch_viewports[PITCH_MID].y += parent->height / 2 -
pitch_viewports[PITCH_MID].height / 2;
pitch_viewports[PITCH_BOTTOM].y += parent->height - height - ICON_BORDER;
}
/* must be called before pitchscreen_draw, or within
* since it neither clears nor updates the display */
static void pitchscreen_draw_icons (struct screen *display,
struct viewport *parent)
{
display->set_viewport(parent);
display->mono_bitmap(bitmap_icons_7x8[Icon_UpArrow],
parent->width/2 - 3,
2, 7, 8);
display->mono_bitmap(bitmap_icons_7x8[Icon_DownArrow],
parent->width /2 - 3,
parent->height - 10, 7, 8);
display->mono_bitmap(bitmap_icons_7x8[Icon_FastForward],
parent->width - 10,
parent->height /2 - 4, 7, 8);
display->mono_bitmap(bitmap_icons_7x8[Icon_FastBackward],
2,
parent->height /2 - 4, 7, 8);
display->update_viewport();
}
static void pitchscreen_draw (struct screen *display, int max_lines,
struct viewport pitch_viewports[PITCH_ITEM_COUNT], int pitch)
{
unsigned char* ptr;
unsigned char buf[32];
int width_val, w, h;
bool show_lang_pitch;
/* Hide "Pitch up/Pitch down" for a small screen */
if (max_lines >= 5)
{
/* UP: Pitch Up */
display->set_viewport(&pitch_viewports[PITCH_TOP]);
if (pitch_mode == PITCH_MODE_ABSOLUTE) {
ptr = str(LANG_PITCH_UP);
} else {
ptr = str(LANG_PITCH_UP_SEMITONE);
}
display->getstringsize(ptr,&w,&h);
display->clear_viewport();
/* draw text */
display->putsxy((pitch_viewports[PITCH_TOP].width / 2) -
(w / 2), 0, ptr);
display->update_viewport();
/* DOWN: Pitch Down */
display->set_viewport(&pitch_viewports[PITCH_BOTTOM]);
if (pitch_mode == PITCH_MODE_ABSOLUTE) {
ptr = str(LANG_PITCH_DOWN);
} else {
ptr = str(LANG_PITCH_DOWN_SEMITONE);
}
display->getstringsize(ptr,&w,&h);
display->clear_viewport();
/* draw text */
display->putsxy((pitch_viewports[PITCH_BOTTOM].width / 2) -
(w / 2), 0, ptr);
display->update_viewport();
}
display->set_viewport(&pitch_viewports[PITCH_MID]);
snprintf((char *)buf, sizeof(buf), "%s", str(LANG_PITCH));
display->getstringsize(buf,&w,&h);
/* lets hide LANG_PITCH for smaller screens */
display->clear_viewport();
if ((show_lang_pitch = (max_lines >= 3)))
display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
0, buf);
/* "XXX.X%" */
snprintf((char *)buf, sizeof(buf), "%d.%d%%",
pitch / 10, pitch % 10 );
display->getstringsize(buf,&width_val,&h);
display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (width_val / 2),
(show_lang_pitch? h : h/2), buf);
/* What's wider? LANG_PITCH or the value?
* Only interesting if LANG_PITCH is actually drawn */
if (show_lang_pitch && width_val > w)
w = width_val;
/* Let's treat '+' and '-' as equally wide
* This saves a getstringsize call
* Also, it wouldn't look nice if -2% shows up, but +2% not */
display->getstringsize("+2%",&width_val,&h);
w += width_val*2;
/* hide +2%/-2% for a narrow screens */
if (w <= pitch_viewports[PITCH_MID].width)
{
/* RIGHT: +2% */
display->putsxy(pitch_viewports[PITCH_MID].width - width_val, h /2, "+2%");
/* LEFT: -2% */
display->putsxy(0, h / 2, "-2%");
}
display->update_viewport();
display->set_viewport(NULL);
}
static int pitch_increase(int pitch, int delta, bool allow_cutoff)
{
int new_pitch;
if (delta < 0) {
if (pitch + delta >= PITCH_MIN) {
new_pitch = pitch + delta;
} else {
if (!allow_cutoff) {
return pitch;
}
new_pitch = PITCH_MIN;
}
} else if (delta > 0) {
if (pitch + delta <= PITCH_MAX) {
new_pitch = pitch + delta;
} else {
if (!allow_cutoff) {
return pitch;
}
new_pitch = PITCH_MAX;
}
} else {
/* delta == 0 -> no real change */
return pitch;
}
sound_set_pitch(new_pitch);
return new_pitch;
}
/* Factor for changing the pitch one half tone up.
The exact value is 2^(1/12) = 1.05946309436
But we use only integer arithmetics, so take
rounded factor multiplied by 10^5=100,000. This is
enough to get the same promille values as if we
had used floating point (checked with a spread
sheet).
*/
#define PITCH_SEMITONE_FACTOR 105946L
/* Some helpful constants. K is the scaling factor for SEMITONE.
N is for more accurate rounding
KN is K * N
*/
#define PITCH_K_FCT 100000UL
#define PITCH_N_FCT 10
#define PITCH_KN_FCT 1000000UL
static int pitch_increase_semitone(int pitch, bool up)
{
uint32_t tmp;
uint32_t round_fct; /* How much to scale down at the end */
tmp = pitch;
if (up) {
tmp = tmp * PITCH_SEMITONE_FACTOR;
round_fct = PITCH_K_FCT;
} else {
tmp = (tmp * PITCH_KN_FCT) / PITCH_SEMITONE_FACTOR;
round_fct = PITCH_N_FCT;
}
/* Scaling down with rounding */
tmp = (tmp + round_fct / 2) / round_fct;
return pitch_increase(pitch, tmp - pitch, false);
}
/*
returns:
0 on exit
1 if USB was connected
*/
int gui_syncpitchscreen_run(void)
{
int button, i;
int pitch = sound_get_pitch();
int new_pitch, delta = 0;
bool nudged = false;
bool exit = false;
/* should maybe be passed per parameter later, not needed for now */
struct viewport parent[NB_SCREENS];
struct viewport pitch_viewports[NB_SCREENS][PITCH_ITEM_COUNT];
int max_lines[NB_SCREENS];
/* initialize pitchscreen vps */
FOR_NB_SCREENS(i)
{
screens[i].clear_display();
viewport_set_defaults(&parent[i], i);
max_lines[i] = viewport_get_nb_lines(&parent[i]);
pitchscreen_fix_viewports(&parent[i], pitch_viewports[i]);
/* also, draw the icons now, it's only needed once */
pitchscreen_draw_icons(&screens[i], &parent[i]);
}
#if CONFIG_CODEC == SWCODEC
pcmbuf_set_low_latency(true);
#endif
while (!exit)
{
FOR_NB_SCREENS(i)
pitchscreen_draw(&screens[i], max_lines[i],
pitch_viewports[i], pitch);
button = get_action(CONTEXT_PITCHSCREEN,HZ);
switch (button) {
case ACTION_PS_INC_SMALL:
delta = PITCH_SMALL_DELTA;
break;
case ACTION_PS_INC_BIG:
delta = PITCH_BIG_DELTA;
break;
case ACTION_PS_DEC_SMALL:
delta = -PITCH_SMALL_DELTA;
break;
case ACTION_PS_DEC_BIG:
delta = -PITCH_BIG_DELTA;
break;
case ACTION_PS_NUDGE_RIGHT:
new_pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false);
nudged = (new_pitch != pitch);
pitch = new_pitch;
break;
case ACTION_PS_NUDGE_RIGHTOFF:
if (nudged) {
pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
}
nudged = false;
break;
case ACTION_PS_NUDGE_LEFT:
new_pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
nudged = (new_pitch != pitch);
pitch = new_pitch;
break;
case ACTION_PS_NUDGE_LEFTOFF:
if (nudged) {
pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false);
}
nudged = false;
break;
case ACTION_PS_RESET:
pitch = 1000;
sound_set_pitch( pitch );
break;
case ACTION_PS_TOGGLE_MODE:
pitch_mode = -pitch_mode;
break;
case ACTION_PS_EXIT:
exit = true;
break;
default:
if(default_event_handler(button) == SYS_USB_CONNECTED)
return 1;
break;
}
if(delta)
{
if (pitch_mode == PITCH_MODE_ABSOLUTE) {
pitch = pitch_increase(pitch, delta, true);
} else {
pitch = pitch_increase_semitone(pitch, delta > 0);
}
delta = 0;
}
}
#if CONFIG_CODEC == SWCODEC
pcmbuf_set_low_latency(false);
#endif
return 0;
}
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