apps/pcmbuf.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Miika Pekkarinen
  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 #ifndef PCMBUF_H
  22 #define PCMBUF_H
  23
  24 #include <sys/types.h>
  25
  26 /* Commit PCM data */
  27 void *pcmbuf_request_buffer(int *count);
  28 void pcmbuf_write_complete(int count, unsigned long elapsed, off_t offset);
  29
  30 /* Init */
  31 size_t pcmbuf_init(void *bufend);
  32
  33 /* Playback */
  34 void pcmbuf_play_start(void);
  35 void pcmbuf_play_stop(void);
  36 void pcmbuf_pause(bool pause);
  37
  38 /* Track change */
  39
  40 /* Track change origin type */
  41 enum pcm_track_change_type
  42 {
  43     TRACK_CHANGE_NONE = 0,     /* No track change pending */
  44     TRACK_CHANGE_MANUAL,       /* Manual change (from user) */
  45     TRACK_CHANGE_AUTO,         /* Automatic change (from codec) */
  46     TRACK_CHANGE_END_OF_DATA,  /* Expect no more data (from codec) */
  47 };
  48 void pcmbuf_monitor_track_change(bool monitor);
  49 void pcmbuf_start_track_change(enum pcm_track_change_type type);
  50
  51 /* Crossfade */
  52 #ifdef HAVE_CROSSFADE
  53 bool pcmbuf_is_crossfade_active(void);
  54 void pcmbuf_request_crossfade_enable(int setting);
  55 bool pcmbuf_is_same_size(void);
  56 #else
  57 /* Dummy functions with sensible returns */
  58 static FORCE_INLINE bool pcmbuf_is_crossfade_active(void)
  59     { return false; }
  60 static FORCE_INLINE void pcmbuf_request_crossfade_enable(bool on_off)
  61     { return; (void)on_off; }
  62 static FORCE_INLINE bool pcmbuf_is_same_size(void)
  63     { return true; }
  64 #endif
  65
  66 /* Debug menu, other metrics */
  67 size_t pcmbuf_free(void);
  68 size_t pcmbuf_get_bufsize(void);
  69 int pcmbuf_used_descs(void);
  70 int pcmbuf_descs(void);
  71
  72 /* Fading and channel volume control */
  73 void pcmbuf_fade(bool fade, bool in);
  74 bool pcmbuf_fading(void);
  75 void pcmbuf_soft_mode(bool shhh);
  76
  77 /* Time and position */
  78 unsigned int pcmbuf_get_position_key(void);
  79 void pcmbuf_sync_position_update(void);
  80
  81 /* Misc */
  82 bool pcmbuf_is_lowdata(void);
  83 void pcmbuf_set_low_latency(bool state);
  84
  85 #endif /* PCMBUF_H */