apps/talk.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2004 Jörg Hohensohn
  11  *
  12  * This module collects the Talkbox and voice UI functions.
  13  * (Talkbox reads directory names from mp3 clips called thumbnails,
  14  *  the voice UI lets menus and screens "talk" from a voicefont in memory.
  15  *
  16  * All files in this archive are subject to the GNU General Public License.
  17  * See the file COPYING in the source tree root for full license agreement.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23
  24 #ifndef __TALK_H__
  25 #define __TALK_H__
  26
  27 #include <stdbool.h>
  28
  29 enum {
  30     /* See array "unit_voiced" in talk.c function "talk_value" */
  31     UNIT_INT = 1, /* plain number */
  32     UNIT_SIGNED,  /* number with mandatory sign (even if positive) */
  33     UNIT_MS,      /* milliseconds */
  34     UNIT_SEC,     /* seconds */
  35     UNIT_MIN,     /* minutes */
  36     UNIT_HOUR,    /* hours */
  37     UNIT_KHZ,     /* kHz */
  38     UNIT_DB,      /* dB, mandatory sign */
  39     UNIT_PERCENT, /* % */
  40     UNIT_MAH,     /* milliAmp hours */
  41     UNIT_PIXEL,   /* pixels */
  42     UNIT_PER_SEC, /* per second */
  43     UNIT_HERTZ,   /* hertz */
  44     UNIT_MB,      /* Megabytes */
  45     UNIT_KBIT,    /* kilobits per sec */
  46     UNIT_LAST     /* END MARKER */
  47 };
  48
  49 #define UNIT_SHIFT (32-5) /* this many bits left from UNIT_xx enum */
  50
  51 /* make a "talkable" ID from number + unit
  52    unit is upper 4 bits, number the remaining (in regular 2's complement) */
  53 #define TALK_ID(n,u) (((long)(u))<<UNIT_SHIFT | ((n) & ~(-1L<<UNIT_SHIFT)))
  54
  55 /* convenience macro to have both virtual pointer and ID as arguments */
  56 #define STR(id) ID2P(id), id
  57
  58 /* publish these strings, so they're stored only once (better than #define) */
  59 extern const char* const dir_thumbnail_name; /* "_dirname.talk" */
  60 extern const char* const file_thumbnail_ext; /* ".talk" for file voicing */
  61
  62 void talk_init(void);
  63 #if CONFIG_CODEC == SWCODEC
  64 bool talk_voice_required(void); /* returns true if voice codec required */
  65 #endif
  66 int talk_get_bufsize(void); /* get the loaded voice file size */
  67 /* talk_buffer_steal - on SWCODEC, for use by buffer functions only */
  68 int talk_buffer_steal(void); /* claim the mp3 buffer e.g. for play/record */
  69 int talk_id(long id, bool enqueue); /* play a voice ID from voicefont */
  70 int talk_file(const char* filename, bool enqueue); /* play a thumbnail from file */
  71 int talk_number(long n, bool enqueue); /* say a number */
  72 int talk_value(long n, int unit, bool enqueue); /* say a numeric value */
  73 int talk_spell(const char* spell, bool enqueue); /* spell a string */
  74 bool talk_menus_enabled(void); /* returns true if menus should be voiced */
  75 void talk_disable_menus(void); /* disable voice menus (temporarily, not persisted) */
  76 void talk_enable_menus(void); /* re-enable voice menus */
  77 #endif /* __TALK_H__ */