firmware/export/pcm_playback.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Linus Nielsen Feltzing
  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 PCM_PLAYBACK_H
  20 #define PCM_PLAYBACK_H
  21
  22 #include <sys/types.h>
  23
  24 /* Typedef for registered callback (play and record) */
  25 typedef void (*pcm_more_callback_type)(unsigned char **start,
  26                                        size_t *size);
  27 typedef int (*pcm_more_callback_type2)(int status);
  28
  29 void pcm_init(void);
  30 void pcm_postinit(void);
  31
  32 /* set the pcm frequency - use values in hw_sampr_list
  33  * use -1 for the default frequency
  34  */
  35 void pcm_set_frequency(unsigned int frequency);
  36 /* apply settings to hardware immediately */
  37 void pcm_apply_settings(void);
  38
  39 /* This is for playing "raw" PCM data */
  40 void pcm_play_data(pcm_more_callback_type get_more,
  41         unsigned char* start, size_t size);
  42
  43 void pcm_calculate_peaks(int *left, int *right);
  44 size_t pcm_get_bytes_waiting(void);
  45
  46 void pcm_play_stop(void);
  47 void pcm_mute(bool mute);
  48 void pcm_play_pause(bool play);
  49 bool pcm_is_paused(void);
  50 bool pcm_is_playing(void);
  51
  52 /** The following are for internal use between pcm_playback.c and target-
  53     specific portion **/
  54
  55 /* the registered callback function to ask for more mp3 data */
  56 extern volatile pcm_more_callback_type pcm_callback_for_more;
  57 extern volatile bool                   pcm_playing;
  58 extern volatile bool                   pcm_paused;
  59
  60 extern void pcm_play_dma_start(const void *addr, size_t size);
  61 extern void pcm_play_dma_stop(void);
  62 extern void pcm_play_pause_pause(void);
  63 extern void pcm_play_pause_unpause(void);
  64
  65 #endif /* PCM_PLAYBACK_H */