firmware/target/arm/as3525/audio-as3525.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2009 by Bertrik Sikken
  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 #include "config.h"
  22 #include "system.h"
  23 #include "cpu.h"
  24 #include "audio.h"
  25 #include "audiohw.h"
  26 #include "sound.h"
  27
  28 int audio_channels = 2;
  29
  30 void audio_set_output_source(int source)
  31 {
  32     bitset32(&CGU_PERI, CGU_I2SOUT_APB_CLOCK_ENABLE);
  33     if (source == AUDIO_SRC_PLAYBACK)
  34         I2SOUT_CONTROL &= ~(1<<5);
  35     else
  36         I2SOUT_CONTROL |= 1<<5; /* source = loopback from i2sin fifo */
  37 }
  38
  39 void audio_input_mux(int source, unsigned flags)
  40 {
  41     static int last_source = AUDIO_SRC_PLAYBACK;
  42 #if defined(HAVE_RECORDING) && (INPUT_SRC_CAPS & SRC_CAP_FMRADIO)
  43     static bool last_recording = false;
  44     const bool recording = flags & SRCF_RECORDING;
  45 #else
  46     (void) flags;
  47 #endif
  48
  49     switch (source)
  50     {
  51         default:                        /* playback - no recording */
  52             source = AUDIO_SRC_PLAYBACK;
  53         case AUDIO_SRC_PLAYBACK:
  54             if (source != last_source)
  55             {
  56                 audio_channels = 2;
  57 #if defined(HAVE_RECORDING) || defined(HAVE_FMRADIO_IN)
  58                 audiohw_set_monitor(false);
  59 #endif
  60 #ifdef HAVE_RECORDING
  61                 audiohw_disable_recording();
  62 #endif
  63             }
  64             break;
  65
  66 #if defined(HAVE_RECORDING) && (INPUT_SRC_CAPS & SRC_CAP_MIC)
  67         case AUDIO_SRC_MIC:             /* recording only */
  68             if (source != last_source)
  69             {
  70                 audio_channels = 1;
  71                 audiohw_set_monitor(false);
  72                 audiohw_enable_recording(true);  /* source mic */
  73             }
  74             break;
  75 #endif
  76
  77 #if (INPUT_SRC_CAPS & SRC_CAP_FMRADIO)
  78
  79         case AUDIO_SRC_FMRADIO:         /* recording and playback */
  80             if (source == last_source
  81 #ifdef HAVE_RECORDING
  82                     && recording == last_recording
  83 #endif
  84                 )
  85                 break;
  86
  87             audio_channels = 2;
  88 #ifdef HAVE_RECORDING
  89             last_recording = recording;
  90
  91             if (recording)
  92             {
  93                 audiohw_set_monitor(false);
  94                 audiohw_enable_recording(false);
  95             }
  96             else
  97 #endif
  98             {
  99 #ifdef HAVE_RECORDING
 100                 audiohw_disable_recording();
 101 #endif
 102 #if defined(HAVE_RECORDING) || defined(HAVE_FMRADIO_IN)
 103                 audiohw_set_monitor(true); /* line 2 analog audio path */
 104 #endif
 105             }
 106             break;
 107 #endif /* (INPUT_SRC_CAPS & SRC_CAP_FMRADIO) */
 108     }
 109
 110     last_source = source;
 111 }