firmware/export/pcm-internal.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Linus Nielsen Feltzing
  11  * Copyright (C) 2011 by Michael Sevakis
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22 #ifndef PCM_INTERNAL_H
  23 #define PCM_INTERNAL_H
  24
  25 #include "config.h"
  26
  27 /* Cheapo buffer align macro to align to the 16-16 PCM size */
  28 #define ALIGN_AUDIOBUF(start, size) \
  29     ({ (start) = (void *)(((uintptr_t)(start) + 3) & ~3); \
  30        (size) &= ~3; })
  31
  32 void pcm_do_peak_calculation(struct pcm_peaks *peaks, bool active,
  33                              const void *addr, int count);
  34
  35 /** The following are for internal use between pcm.c and target-
  36     specific portion **/
  37 static FORCE_INLINE enum pcm_dma_status pcm_call_status_cb(
  38     pcm_status_callback_type callback, enum pcm_dma_status status)
  39 {
  40     if (!callback)
  41         return status;
  42
  43     return callback(status);
  44 }
  45
  46 static FORCE_INLINE enum pcm_dma_status
  47 pcm_play_dma_status_callback(enum pcm_dma_status status)
  48 {
  49     extern enum pcm_dma_status
  50         (* volatile pcm_play_status_callback)(enum pcm_dma_status);
  51     return pcm_call_status_cb(pcm_play_status_callback, status);
  52 }
  53
  54 /* Called by the bottom layer ISR when more data is needed. Returns true
  55  * if a new buffer is available, false otherwise. */
  56 bool pcm_play_dma_complete_callback(enum pcm_dma_status status,
  57                                     const void **addr, size_t *size);
  58
  59 extern unsigned long pcm_curr_sampr;
  60 extern unsigned long pcm_sampr;
  61 extern int pcm_fsel;
  62
  63 #ifdef HAVE_PCM_DMA_ADDRESS
  64 void * pcm_dma_addr(void *addr);
  65 #endif
  66
  67 extern volatile bool pcm_playing;
  68 extern volatile bool pcm_paused;
  69
  70 void pcm_play_dma_lock(void);
  71 void pcm_play_dma_unlock(void);
  72 void pcm_play_dma_init(void) INIT_ATTR;
  73 void pcm_play_dma_postinit(void);
  74 void pcm_play_dma_start(const void *addr, size_t size);
  75 void pcm_play_dma_stop(void);
  76 void pcm_play_dma_pause(bool pause);
  77 const void * pcm_play_dma_get_peak_buffer(int *count);
  78
  79 void pcm_dma_apply_settings(void);
  80
  81 #ifdef HAVE_RECORDING
  82
  83 /* DMA transfer in is currently active */
  84 extern volatile bool pcm_recording;
  85
  86 /* APIs implemented in the target-specific portion */
  87 void pcm_rec_dma_init(void);
  88 void pcm_rec_dma_close(void);
  89 void pcm_rec_dma_start(void *addr, size_t size);
  90 void pcm_rec_dma_stop(void);
  91 const void * pcm_rec_dma_get_peak_buffer(void);
  92
  93 static FORCE_INLINE enum pcm_dma_status
  94 pcm_rec_dma_status_callback(enum pcm_dma_status status)
  95 {
  96     extern enum pcm_dma_status
  97         (* volatile pcm_rec_status_callback)(enum pcm_dma_status);
  98     return pcm_call_status_cb(pcm_rec_status_callback, status);
  99 }
 100
 101
 102 /* Called by the bottom layer ISR when more data is needed. Returns true
 103  * if a new buffer is available, false otherwise. */
 104 bool pcm_rec_dma_complete_callback(enum pcm_dma_status status,
 105                                    void **addr, size_t *size);
 106
 107 #ifdef HAVE_PCM_REC_DMA_ADDRESS
 108 #define pcm_rec_dma_addr(addr) pcm_dma_addr(addr)
 109 #else
 110 #define pcm_rec_dma_addr(addr) addr
 111 #endif
 112
 113 #endif /* HAVE_RECORDING */
 114
 115 #endif /* PCM_INTERNAL_H */