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  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #ifndef PCMBUF_H
  20 #define PCMBUF_H
  21
  22 /* Guard buffer for crossfader when dsp is enabled. */
  23 #define PCMBUF_GUARD  32768
  24
  25 void pcmbuf_init(long bufsize);
  26 long pcmbuf_get_bufsize(void);
  27
  28 void pcmbuf_play_stop(void);
  29 bool pcmbuf_is_crossfade_active(void);
  30
  31 /* These functions are for playing chained buffers of PCM data */
  32 bool pcmbuf_add_chunk(void *addr, int size, void (*callback)(void));
  33 int pcmbuf_num_used_buffers(void);
  34 void pcmbuf_set_watermark(int numbytes, void (*callback)(int bytes_left));
  35
  36 void pcmbuf_set_boost_mode(bool state);
  37 bool pcmbuf_is_lowdata(void);
  38 void pcmbuf_flush_audio(void);
  39 bool pcmbuf_crossfade_init(int type);
  40 void pcmbuf_add_event(void (*event_handler)(void));
  41 unsigned int pcmbuf_get_latency(void);
  42 bool pcmbuf_insert_buffer(char *buf, long length);
  43 void pcmbuf_flush_buffer(long length);
  44 void* pcmbuf_request_buffer(long length, long *realsize);
  45 bool pcmbuf_is_crossfade_enabled(void);
  46 void pcmbuf_crossfade_enable(bool on_off);
  47
  48 #endif