apps/plugins/mpegplayer/pcm_output.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * PCM output buffer declarations
  11  *
  12  * Copyright (c) 2007 Michael Sevakis
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23 #ifndef PCM_OUTPUT_H
  24 #define PCM_OUTPUT_H
  25
  26 #define PCM_HDR_SIZE        (sizeof (struct pcm_frame_header))
  27 struct pcm_frame_header   /* Header added to pcm data every time a decoded
  28                              audio frame is sent out */
  29 {
  30     uint32_t size;        /* size of this frame - including header */
  31     uint32_t time;        /* timestamp for this frame in audio ticks */
  32     unsigned char data[]; /* open array of audio data */
  33 } ALIGNED_ATTR(4);
  34
  35 bool pcm_output_init(void);
  36 void pcm_output_exit(void);
  37 void pcm_output_flush(void);
  38 void pcm_output_set_clock(uint32_t time);
  39 uint32_t pcm_output_get_clock(void);
  40 uint32_t pcm_output_get_ticks(uint32_t *start);
  41 void pcm_output_play_pause(bool play);
  42 void pcm_output_stop(void);
  43 void pcm_output_drain(void);
  44 unsigned char * pcm_output_get_buffer(ssize_t *size);
  45 bool pcm_output_commit_data(ssize_t size, uint32_t timestamp);
  46 bool pcm_output_empty(void);
  47
  48 #endif /* PCM_OUTPUT_H */