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