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 enum
  30 {
  31     STEREO_INTERLEAVED = 0,
  32     STEREO_NONINTERLEAVED,
  33     STEREO_MONO,
  34     STEREO_NUM_MODES,
  35 };
  36
  37 enum
  38 {
  39     CODEC_IDX_AUDIO = 0,
  40     CODEC_IDX_VOICE,
  41 };
  42
  43 enum
  44 {
  45     DSP_MYDSP = 1,
  46     DSP_SET_FREQUENCY,
  47     DSP_SWITCH_FREQUENCY,
  48     DSP_SET_SAMPLE_DEPTH,
  49     DSP_SET_STEREO_MODE,
  50     DSP_RESET,
  51     DSP_FLUSH,
  52     DSP_SET_TRACK_GAIN,
  53     DSP_SET_ALBUM_GAIN,
  54     DSP_SET_TRACK_PEAK,
  55     DSP_SET_ALBUM_PEAK,
  56     DSP_CROSSFEED
  57 };
  58
  59 enum {
  60     DSP_CALLBACK_SET_PRESCALE = 0,
  61     DSP_CALLBACK_SET_BASS,
  62     DSP_CALLBACK_SET_TREBLE,
  63     DSP_CALLBACK_SET_CHANNEL_CONFIG,
  64     DSP_CALLBACK_SET_STEREO_WIDTH
  65 };
  66
  67 /* A bunch of fixed point assembler helper macros */
  68 #if defined(CPU_COLDFIRE)
  69 /* These macros use the Coldfire EMAC extension and need the MACSR flags set
  70  * to fractional mode with no rounding.
  71  */
  72
  73 /* Multiply two S.31 fractional integers and return the sign bit and the
  74  * 31 most significant bits of the result.
  75  */
  76 #define FRACMUL(x, y) \
  77 ({ \
  78     long t; \
  79     asm ("mac.l    %[a], %[b], %%acc0\n\t" \
  80          "movclr.l %%acc0, %[t]\n\t" \
  81          : [t] "=r" (t) : [a] "r" (x), [b] "r" (y)); \
  82     t; \
  83 })
  84
  85 /* Multiply two S.31 fractional integers, and return the 32 most significant
  86  * bits after a shift left by the constant z. NOTE: Only works for shifts of
  87  * 1 to 8 on Coldfire!
  88  */
  89 #define FRACMUL_SHL(x, y, z) \
  90 ({ \
  91     long t, t2; \
  92     asm ("mac.l    %[a], %[b], %%acc0\n\t" \
  93          "moveq.l  %[d], %[t]\n\t" \
  94          "move.l   %%accext01, %[t2]\n\t" \
  95          "and.l    %[mask], %[t2]\n\t" \
  96          "lsr.l    %[t], %[t2]\n\t" \
  97          "movclr.l %%acc0, %[t]\n\t" \
  98          "asl.l    %[c], %[t]\n\t" \
  99          "or.l     %[t2], %[t]\n\t" \
 100          : [t] "=&d" (t), [t2] "=&d" (t2) \
 101          : [a] "r" (x), [b] "r" (y), [mask] "d" (0xff), \
 102            [c] "i" ((z)), [d] "i" (8 - (z))); \
 103     t; \
 104 })
 105
 106 #elif defined(CPU_ARM)
 107
 108 /* Multiply two S.31 fractional integers and return the sign bit and the
 109  * 31 most significant bits of the result.
 110  */
 111 #define FRACMUL(x, y) \
 112 ({ \
 113     long t, t2; \
 114     asm ("smull    %[t], %[t2], %[a], %[b]\n\t" \
 115          "mov      %[t2], %[t2], asl #1\n\t" \
 116          "orr      %[t], %[t2], %[t], lsr #31\n\t" \
 117          : [t] "=&r" (t), [t2] "=&r" (t2) \
 118          : [a] "r" (x), [b] "r" (y)); \
 119     t; \
 120 })
 121
 122 /* Multiply two S.31 fractional integers, and return the 32 most significant
 123  * bits after a shift left by the constant z.
 124  */
 125 #define FRACMUL_SHL(x, y, z) \
 126 ({ \
 127     long t, t2; \
 128     asm ("smull    %[t], %[t2], %[a], %[b]\n\t" \
 129          "mov      %[t2], %[t2], asl %[c]\n\t" \
 130          "orr      %[t], %[t2], %[t], lsr %[d]\n\t" \
 131          : [t] "=&r" (t), [t2] "=&r" (t2) \
 132          : [a] "r" (x), [b] "r" (y), \
 133            [c] "M" ((z) + 1), [d] "M" (31 - (z))); \
 134     t; \
 135 })
 136
 137 #else
 138
 139 #define FRACMUL(x, y) (long) (((((long long) (x)) * ((long long) (y))) >> 31))
 140 #define FRACMUL_SHL(x, y, z) \
 141 ((long)(((((long long) (x)) * ((long long) (y))) >> (31 - (z)))))
 142
 143 #endif
 144
 145 #define DIV64(x, y, z) (long)(((long long)(x) << (z))/(y))
 146
 147 struct dsp_config;
 148
 149 int dsp_process(struct dsp_config *dsp, char *dest,
 150                 const char *src[], int count);
 151 int dsp_input_count(struct dsp_config *dsp, int count);
 152 int dsp_output_count(struct dsp_config *dsp, int count);
 153 intptr_t dsp_configure(struct dsp_config *dsp, int setting,
 154                        intptr_t value);
 155 void dsp_set_replaygain(void);
 156 void dsp_set_crossfeed(bool enable);
 157 void dsp_set_crossfeed_direct_gain(int gain);
 158 void dsp_set_crossfeed_cross_params(long lf_gain, long hf_gain,
 159                                     long cutoff);
 160 void dsp_set_eq(bool enable);
 161 void dsp_set_eq_precut(int precut);
 162 void dsp_set_eq_coefs(int band);
 163 void sound_set_pitch(int r);
 164 int sound_get_pitch(void);
 165 int dsp_callback(int msg, intptr_t param);
 166 void dsp_dither_enable(bool enable);
 167
 168 #endif