apps/gui/pitchscreen.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Björn Stenberg
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <stdbool.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include "config.h"
  26 #include "sprintf.h"
  27 #include "action.h"
  28 #include "dsp.h"
  29 #include "sound.h"
  30 #include "pcmbuf.h"
  31 #include "lang.h"
  32 #include "icons.h"
  33 #include "screens.h"
  34 #include "statusbar.h"
  35 #include "viewport.h"
  36 #include "font.h"
  37 #include "system.h"
  38 #include "misc.h"
  39 #include "pitchscreen.h"
  40
  41 #define PITCH_MODE_ABSOLUTE 1
  42 #define PITCH_MODE_SEMITONE -PITCH_MODE_ABSOLUTE
  43 #define ICON_BORDER 12 /* icons are currently 7x8, so add ~2 pixels  */
  44                        /*   on both sides when drawing */
  45
  46
  47 #define PITCH_MAX         2000
  48 #define PITCH_MIN         500
  49 #define PITCH_SMALL_DELTA 1
  50 #define PITCH_BIG_DELTA   10
  51 #define PITCH_NUDGE_DELTA 20
  52
  53
  54 static int pitch_mode = PITCH_MODE_ABSOLUTE; /* 1 - absolute, -1 - semitone */
  55
  56 enum
  57 {
  58     PITCH_TOP = 0,
  59     PITCH_MID,
  60     PITCH_BOTTOM,
  61     PITCH_ITEM_COUNT,
  62 };
  63
  64 static void pitchscreen_fix_viewports(struct viewport *parent,
  65         struct viewport pitch_viewports[PITCH_ITEM_COUNT])
  66 {
  67     int i, height;
  68     height = font_get(parent->font)->height;
  69     for (i = 0; i < PITCH_ITEM_COUNT; i++)
  70     {
  71         pitch_viewports[i] = *parent;
  72         pitch_viewports[i].height = height;
  73     }
  74     pitch_viewports[PITCH_TOP].y += ICON_BORDER;
  75
  76     pitch_viewports[PITCH_MID].x += ICON_BORDER;
  77     pitch_viewports[PITCH_MID].width = parent->width - ICON_BORDER*2;
  78     pitch_viewports[PITCH_MID].height = height * 2;
  79     pitch_viewports[PITCH_MID].y += parent->height / 2 -
  80             pitch_viewports[PITCH_MID].height / 2;
  81
  82     pitch_viewports[PITCH_BOTTOM].y += parent->height - height - ICON_BORDER;
  83 }
  84
  85 /* must be called before pitchscreen_draw, or within
  86  * since it neither clears nor updates the display */
  87 static void pitchscreen_draw_icons (struct screen *display,
  88                                     struct viewport *parent)
  89 {
  90     display->set_viewport(parent);
  91     display->mono_bitmap(bitmap_icons_7x8[Icon_UpArrow],
  92             parent->width/2 - 3,
  93             2, 7, 8);
  94     display->mono_bitmap(bitmap_icons_7x8[Icon_DownArrow],
  95             parent->width /2 - 3,
  96             parent->height - 10, 7, 8);
  97     display->mono_bitmap(bitmap_icons_7x8[Icon_FastForward],
  98             parent->width - 10,
  99             parent->height /2 - 4, 7, 8);
 100     display->mono_bitmap(bitmap_icons_7x8[Icon_FastBackward],
 101             2,
 102             parent->height /2 - 4, 7, 8);
 103     display->update_viewport();
 104 }
 105
 106 static void pitchscreen_draw (struct screen *display, int max_lines,
 107         struct viewport pitch_viewports[PITCH_ITEM_COUNT], int pitch)
 108 {
 109     unsigned char* ptr;
 110     unsigned char buf[32];
 111     int width_val, w, h;
 112     bool show_lang_pitch;
 113
 114      /* Hide "Pitch up/Pitch down" for a small screen */
 115     if (max_lines >= 5)
 116     {
 117         /* UP: Pitch Up */
 118         display->set_viewport(&pitch_viewports[PITCH_TOP]);
 119         if (pitch_mode == PITCH_MODE_ABSOLUTE) {
 120             ptr = str(LANG_PITCH_UP);
 121         } else {
 122             ptr = str(LANG_PITCH_UP_SEMITONE);
 123         }
 124         display->getstringsize(ptr,&w,&h);
 125         display->clear_viewport();
 126         /* draw text */
 127         display->putsxy((pitch_viewports[PITCH_TOP].width / 2) -
 128                 (w / 2), 0, ptr);
 129         display->update_viewport();
 130
 131         /* DOWN: Pitch Down */
 132         display->set_viewport(&pitch_viewports[PITCH_BOTTOM]);
 133         if (pitch_mode == PITCH_MODE_ABSOLUTE) {
 134             ptr = str(LANG_PITCH_DOWN);
 135         } else {
 136             ptr = str(LANG_PITCH_DOWN_SEMITONE);
 137         }
 138         display->getstringsize(ptr,&w,&h);
 139         display->clear_viewport();
 140         /* draw text */
 141         display->putsxy((pitch_viewports[PITCH_BOTTOM].width / 2) -
 142                 (w / 2), 0, ptr);
 143         display->update_viewport();
 144     }
 145     display->set_viewport(&pitch_viewports[PITCH_MID]);
 146
 147     snprintf((char *)buf, sizeof(buf), "%s", str(LANG_PITCH));
 148     display->getstringsize(buf,&w,&h);
 149     /* lets hide LANG_PITCH for smaller screens */
 150     display->clear_viewport();
 151     if ((show_lang_pitch = (max_lines >= 3)))
 152         display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
 153                 0, buf);
 154
 155     /* "XXX.X%" */
 156     snprintf((char *)buf, sizeof(buf), "%d.%d%%",
 157             pitch / 10, pitch % 10 );
 158     display->getstringsize(buf,&width_val,&h);
 159     display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (width_val / 2),
 160             (show_lang_pitch? h : h/2), buf);
 161
 162     /* What's wider? LANG_PITCH or the value?
 163      * Only interesting if LANG_PITCH is actually drawn */
 164     if (show_lang_pitch && width_val > w)
 165         w = width_val;
 166
 167     /* Let's treat '+' and '-' as equally wide
 168      * This saves a getstringsize call
 169      * Also, it wouldn't look nice if -2% shows up, but +2% not */
 170     display->getstringsize("+2%",&width_val,&h);
 171     w += width_val*2;
 172     /* hide +2%/-2% for a narrow screens */
 173     if (w <= pitch_viewports[PITCH_MID].width)
 174     {
 175         /* RIGHT: +2% */
 176         display->putsxy(pitch_viewports[PITCH_MID].width - width_val, h /2, "+2%");
 177         /* LEFT: -2% */
 178         display->putsxy(0, h / 2, "-2%");
 179     }
 180     display->update_viewport();
 181     display->set_viewport(NULL);
 182 }
 183
 184 static int pitch_increase(int pitch, int delta, bool allow_cutoff)
 185 {
 186     int new_pitch;
 187
 188     if (delta < 0) {
 189         if (pitch + delta >= PITCH_MIN) {
 190             new_pitch = pitch + delta;
 191         } else {
 192             if (!allow_cutoff) {
 193                 return pitch;
 194             }
 195             new_pitch = PITCH_MIN;
 196         }
 197     } else if (delta > 0) {
 198         if (pitch + delta <= PITCH_MAX) {
 199             new_pitch = pitch + delta;
 200         } else {
 201             if (!allow_cutoff) {
 202                 return pitch;
 203             }
 204             new_pitch = PITCH_MAX;
 205         }
 206     } else {
 207         /* delta == 0 -> no real change */
 208         return pitch;
 209     }
 210     sound_set_pitch(new_pitch);
 211
 212     return new_pitch;
 213 }
 214
 215 /* Factor for changing the pitch one half tone up.
 216    The exact value is 2^(1/12) = 1.05946309436
 217    But we use only integer arithmetics, so take
 218    rounded factor multiplied by 10^5=100,000. This is
 219    enough to get the same promille values as if we
 220    had used floating point (checked with a spread
 221    sheet).
 222  */
 223 #define PITCH_SEMITONE_FACTOR 105946L
 224
 225 /* Some helpful constants. K is the scaling factor for SEMITONE.
 226    N is for more accurate rounding
 227    KN is K * N
 228  */
 229 #define PITCH_K_FCT           100000UL
 230 #define PITCH_N_FCT           10
 231 #define PITCH_KN_FCT          1000000UL
 232
 233 static int pitch_increase_semitone(int pitch, bool up)
 234 {
 235     uint32_t tmp;
 236     uint32_t round_fct; /* How much to scale down at the end */
 237     tmp = pitch;
 238     if (up) {
 239         tmp = tmp * PITCH_SEMITONE_FACTOR;
 240         round_fct = PITCH_K_FCT;
 241     } else {
 242         tmp = (tmp * PITCH_KN_FCT) / PITCH_SEMITONE_FACTOR;
 243         round_fct = PITCH_N_FCT;
 244     }
 245     /* Scaling down with rounding */
 246     tmp = (tmp + round_fct / 2) / round_fct;
 247     return pitch_increase(pitch, tmp - pitch, false);
 248 }
 249
 250 /*
 251     returns:
 252     0 on exit
 253     1 if USB was connected
 254 */
 255
 256 int gui_syncpitchscreen_run(void)
 257 {
 258     int button, i;
 259     int pitch = sound_get_pitch();
 260     int new_pitch, delta = 0;
 261     bool nudged = false;
 262     bool exit = false;
 263     /* should maybe be passed per parameter later, not needed for now */
 264     struct viewport parent[NB_SCREENS];
 265     struct viewport pitch_viewports[NB_SCREENS][PITCH_ITEM_COUNT];
 266     int max_lines[NB_SCREENS];
 267
 268     /* initialize pitchscreen vps */
 269     FOR_NB_SCREENS(i)
 270     {
 271         screens[i].clear_display();
 272         viewport_set_defaults(&parent[i], i);
 273         max_lines[i] = viewport_get_nb_lines(&parent[i]);
 274         pitchscreen_fix_viewports(&parent[i], pitch_viewports[i]);
 275
 276         /* also, draw the icons now, it's only needed once */
 277         pitchscreen_draw_icons(&screens[i], &parent[i]);
 278     }
 279 #if CONFIG_CODEC == SWCODEC
 280     pcmbuf_set_low_latency(true);
 281 #endif
 282
 283     while (!exit)
 284     {
 285         FOR_NB_SCREENS(i)
 286             pitchscreen_draw(&screens[i], max_lines[i],
 287                               pitch_viewports[i], pitch);
 288         button = get_action(CONTEXT_PITCHSCREEN,HZ);
 289         switch (button) {
 290             case ACTION_PS_INC_SMALL:
 291                 delta = PITCH_SMALL_DELTA;
 292                 break;
 293
 294             case ACTION_PS_INC_BIG:
 295                 delta = PITCH_BIG_DELTA;
 296                 break;
 297
 298             case ACTION_PS_DEC_SMALL:
 299                 delta = -PITCH_SMALL_DELTA;
 300                 break;
 301
 302             case ACTION_PS_DEC_BIG:
 303                 delta = -PITCH_BIG_DELTA;
 304                 break;
 305
 306             case ACTION_PS_NUDGE_RIGHT:
 307                 new_pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false);
 308                 nudged = (new_pitch != pitch);
 309                 pitch = new_pitch;
 310                 break;
 311
 312             case ACTION_PS_NUDGE_RIGHTOFF:
 313                 if (nudged) {
 314                     pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
 315                 }
 316                 nudged = false;
 317                 break;
 318
 319             case ACTION_PS_NUDGE_LEFT:
 320                 new_pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false);
 321                 nudged = (new_pitch != pitch);
 322                 pitch = new_pitch;
 323                 break;
 324
 325             case ACTION_PS_NUDGE_LEFTOFF:
 326                 if (nudged) {
 327                     pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false);
 328                 }
 329                 nudged = false;
 330                 break;
 331
 332             case ACTION_PS_RESET:
 333                 pitch = 1000;
 334                 sound_set_pitch( pitch );
 335                 break;
 336
 337             case ACTION_PS_TOGGLE_MODE:
 338                 pitch_mode = -pitch_mode;
 339                 break;
 340
 341             case ACTION_PS_EXIT:
 342                 exit = true;
 343                 break;
 344
 345             default:
 346                 if(default_event_handler(button) == SYS_USB_CONNECTED)
 347                     return 1;
 348                 break;
 349         }
 350         if(delta)
 351         {
 352             if (pitch_mode == PITCH_MODE_ABSOLUTE) {
 353                 pitch = pitch_increase(pitch, delta, true);
 354             } else {
 355                 pitch = pitch_increase_semitone(pitch, delta > 0 ? true:false);
 356             }
 357
 358             delta = 0;
 359         }
 360     }
 361 #if CONFIG_CODEC == SWCODEC
 362     pcmbuf_set_low_latency(false);
 363 #endif
 364     return 0;
 365 }