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rockbox/apps/gui/pitchscreen.c
Steve Bavin cbbf032c1b Display speed as relative to real-time, not timestretch amount. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21375 a1c6a512-1295-4272-9138-f99709370657
2009-06-20 10:36:07 +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"
#if CONFIG_CODEC == SWCODEC
#include "tdspeed.h"
#endif
#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 enum
{
PITCH_MODE_ABSOLUTE,
PITCH_MODE_SEMITONE,
#if CONFIG_CODEC == SWCODEC
PITCH_MODE_TIMESTRETCH,
#endif
} pitch_mode = PITCH_MODE_ABSOLUTE;
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
#if CONFIG_CODEC == SWCODEC
,int speedxpitch
#endif
)
{
unsigned char* ptr;
char buf[32];
int w, h;
bool show_lang_pitch;
/* "Pitch up/Pitch down" - hide for a small screen */
if (max_lines >= 5)
{
/* UP: Pitch Up */
display->set_viewport(&pitch_viewports[PITCH_TOP]);
if (pitch_mode == PITCH_MODE_SEMITONE)
ptr = str(LANG_PITCH_UP_SEMITONE);
else
ptr = str(LANG_PITCH_UP);
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_SEMITONE)
ptr = str(LANG_PITCH_DOWN_SEMITONE);
else
ptr = str(LANG_PITCH_DOWN);
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();
}
/* Middle section */
display->set_viewport(&pitch_viewports[PITCH_MID]);
display->clear_viewport();
int width_used = 0;
/* Middle section upper line - hide for a small screen */
if ((show_lang_pitch = (max_lines >= 3)))
{
#if CONFIG_CODEC == SWCODEC
if (pitch_mode != PITCH_MODE_TIMESTRETCH)
{
#endif
/* LANG_PITCH */
snprintf(buf, sizeof(buf), "%s", str(LANG_PITCH));
#if CONFIG_CODEC == SWCODEC
}
else
{
/* Pitch:XXX.X% */
snprintf(buf, sizeof(buf), "%s:%d.%d%%", str(LANG_PITCH),
pitch / 10, pitch % 10);
}
#endif
display->getstringsize(buf, &w, &h);
display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
0, buf);
if (w > width_used)
width_used = w;
}
/* Middle section lower line */
#if CONFIG_CODEC == SWCODEC
if (pitch_mode != PITCH_MODE_TIMESTRETCH)
{
#endif
/* "XXX.X%" */
snprintf(buf, sizeof(buf), "%d.%d%%",
pitch / 10, pitch % 10);
#if CONFIG_CODEC == SWCODEC
}
else
{
/* "Speed:XXX%" */
snprintf(buf, sizeof(buf), "%s:%d%%", str(LANG_SPEED),
speedxpitch / 1000);
}
#endif
display->getstringsize(buf, &w, &h);
display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
(show_lang_pitch ? h : h/2), buf);
if (w > width_used)
width_used = w;
/* Middle section left/right labels */
const char *leftlabel = "-2%";
const char *rightlabel = "+2%";
#if CONFIG_CODEC == SWCODEC
if (pitch_mode == PITCH_MODE_TIMESTRETCH)
{
leftlabel = "<<";
rightlabel = ">>";
}
#endif
/* Only display if they fit */
display->getstringsize(leftlabel, &w, &h);
width_used += w;
display->getstringsize(rightlabel, &w, &h);
width_used += w;
if (width_used <= pitch_viewports[PITCH_MID].width)
{
display->putsxy(0, h / 2, leftlabel);
display->putsxy(pitch_viewports[PITCH_MID].width - w, h /2, rightlabel);
}
display->update_viewport();
display->set_viewport(NULL);
}
static int pitch_increase(int pitch, int pitch_delta, bool allow_cutoff)
{
int new_pitch;
if (pitch_delta < 0)
{
if (pitch + pitch_delta >= PITCH_MIN)
new_pitch = pitch + pitch_delta;
else
{
if (!allow_cutoff)
return pitch;
new_pitch = PITCH_MIN;
}
}
else if (pitch_delta > 0)
{
if (pitch + pitch_delta <= PITCH_MAX)
new_pitch = pitch + pitch_delta;
else
{
if (!allow_cutoff)
return pitch;
new_pitch = PITCH_MAX;
}
}
else
{
/* pitch_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();
#if CONFIG_CODEC == SWCODEC
int speed = dsp_get_timestretch();
int maintain_speed_pitch = speed * pitch; /* speed * pitch to maintain */
#endif
int new_pitch;
int pitch_delta;
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
#if CONFIG_CODEC == SWCODEC
, maintain_speed_pitch
#endif
);
pitch_delta = 0;
button = get_action(CONTEXT_PITCHSCREEN, HZ);
switch (button)
{
case ACTION_PS_INC_SMALL:
pitch_delta = PITCH_SMALL_DELTA;
break;
case ACTION_PS_INC_BIG:
pitch_delta = PITCH_BIG_DELTA;
break;
case ACTION_PS_DEC_SMALL:
pitch_delta = -PITCH_SMALL_DELTA;
break;
case ACTION_PS_DEC_BIG:
pitch_delta = -PITCH_BIG_DELTA;
break;
case ACTION_PS_NUDGE_RIGHT:
#if CONFIG_CODEC == SWCODEC
if (pitch_mode != PITCH_MODE_TIMESTRETCH)
{
#endif
new_pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false);
nudged = (new_pitch != pitch);
pitch = new_pitch;
break;
#if CONFIG_CODEC == SWCODEC
}
case ACTION_PS_FASTER:
if (pitch_mode == PITCH_MODE_TIMESTRETCH)
{
if (speed < SPEED_MAX)
{
speed++;
dsp_set_timestretch(speed);
maintain_speed_pitch = speed * pitch;
}
}
break;
#endif
case ACTION_PS_NUDGE_RIGHTOFF:
if (nudged)
{
pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
nudged = false;
}
break;
case ACTION_PS_NUDGE_LEFT:
#if CONFIG_CODEC == SWCODEC
if (pitch_mode != PITCH_MODE_TIMESTRETCH)
{
#endif
new_pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
nudged = (new_pitch != pitch);
pitch = new_pitch;
break;
#if CONFIG_CODEC == SWCODEC
}
case ACTION_PS_SLOWER:
if (pitch_mode == PITCH_MODE_TIMESTRETCH)
{
if (speed > SPEED_MIN)
{
speed--;
dsp_set_timestretch(speed);
maintain_speed_pitch = speed * pitch;
}
}
break;
#endif
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);
#if CONFIG_CODEC == SWCODEC
speed = 100;
dsp_set_timestretch(speed);
maintain_speed_pitch = speed * pitch;
#endif
break;
case ACTION_PS_TOGGLE_MODE:
++pitch_mode;
#if CONFIG_CODEC == SWCODEC
if (dsp_timestretch_available())
{
if (pitch_mode > PITCH_MODE_TIMESTRETCH)
pitch_mode = PITCH_MODE_ABSOLUTE;
break;
}
#endif
if (pitch_mode > PITCH_MODE_SEMITONE)
pitch_mode = PITCH_MODE_ABSOLUTE;
break;
case ACTION_PS_EXIT:
exit = true;
break;
default:
if (default_event_handler(button) == SYS_USB_CONNECTED)
return 1;
break;
}
if (pitch_delta)
{
if (pitch_mode == PITCH_MODE_SEMITONE)
pitch = pitch_increase_semitone(pitch, pitch_delta > 0);
else
pitch = pitch_increase(pitch, pitch_delta, true);
#if CONFIG_CODEC == SWCODEC
if (pitch_mode == PITCH_MODE_TIMESTRETCH)
{
/* Set speed to maintain time dimension */
/* i.e. increase pitch, slow down speed */
int new_speed = maintain_speed_pitch / pitch;
if (new_speed >= SPEED_MIN && new_speed <= SPEED_MAX)
{
speed = new_speed;
dsp_set_timestretch(speed);
}
}
else
maintain_speed_pitch = speed * pitch;
#endif
}
}
#if CONFIG_CODEC == SWCODEC
pcmbuf_set_low_latency(false);
#endif
return 0;
}
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