apps/dsp.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Miika Pekkarinen
  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
  22 #ifndef _DSP_H
  23 #define _DSP_H
  24
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27
  28 #define NATIVE_FREQUENCY       44100
  29 #define LIMITER_BUFFER_SIZE      288    /* ~6.5 ms */
  30 #define MAX_LIMITER_GAIN          80    /*    8 dB */
  31 enum
  32 {
  33     STEREO_INTERLEAVED = 0,
  34     STEREO_NONINTERLEAVED,
  35     STEREO_MONO,
  36     STEREO_NUM_MODES,
  37 };
  38
  39 enum
  40 {
  41     CODEC_IDX_AUDIO = 0,
  42     CODEC_IDX_VOICE,
  43 };
  44
  45 enum
  46 {
  47     DSP_MYDSP = 1,
  48     DSP_SET_FREQUENCY,
  49     DSP_SWITCH_FREQUENCY,
  50     DSP_SET_SAMPLE_DEPTH,
  51     DSP_SET_STEREO_MODE,
  52     DSP_RESET,
  53     DSP_FLUSH,
  54     DSP_SET_TRACK_GAIN,
  55     DSP_SET_ALBUM_GAIN,
  56     DSP_SET_TRACK_PEAK,
  57     DSP_SET_ALBUM_PEAK,
  58     DSP_CROSSFEED
  59 };
  60
  61 struct dsp_config;
  62
  63 int dsp_process(struct dsp_config *dsp, char *dest,
  64                 const char *src[], int count);
  65 int dsp_input_count(struct dsp_config *dsp, int count);
  66 int dsp_output_count(struct dsp_config *dsp, int count);
  67 intptr_t dsp_configure(struct dsp_config *dsp, int setting,
  68                        intptr_t value);
  69 void dsp_set_replaygain(void);
  70 void dsp_set_crossfeed(bool enable);
  71 void dsp_set_crossfeed_direct_gain(int gain);
  72 void dsp_set_crossfeed_cross_params(long lf_gain, long hf_gain,
  73                                     long cutoff);
  74 void dsp_set_eq(bool enable);
  75 void dsp_set_eq_precut(int precut);
  76 void dsp_set_eq_coefs(int band);
  77 void dsp_dither_enable(bool enable);
  78 void dsp_timestretch_enable(bool enable);
  79 bool dsp_timestretch_available(void);
  80 void sound_set_pitch(int32_t r);
  81 int32_t sound_get_pitch(void);
  82 void dsp_set_timestretch(int32_t percent);
  83 int32_t dsp_get_timestretch(void);
  84 int dsp_callback(int msg, intptr_t param);
  85 int dsp_flush_limiter_buffer(char *dest);
  86 void dsp_set_limiter(int limiter_level);
  87
  88 #endif