summaryrefslogtreecommitdiffstats
path: root/apps/dsp.h
blob: c3239360b03c43c979483fd615f33812f5e379ac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 Miika Pekkarinen
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#ifndef _DSP_H
#define _DSP_H

#include <stdlib.h>
#include <stdbool.h>

#define NATIVE_FREQUENCY       44100
enum
{
    STEREO_INTERLEAVED = 0,
    STEREO_NONINTERLEAVED,
    STEREO_MONO,
    STEREO_NUM_MODES,
};

enum
{
    CODEC_IDX_AUDIO = 0,
    CODEC_IDX_VOICE,
};

enum
{
    DSP_MYDSP = 1,
    DSP_SET_FREQUENCY,
    DSP_SWITCH_FREQUENCY,
    DSP_SET_SAMPLE_DEPTH,
    DSP_SET_STEREO_MODE,
    DSP_RESET,
    DSP_FLUSH,
    DSP_SET_TRACK_GAIN,
    DSP_SET_ALBUM_GAIN,
    DSP_SET_TRACK_PEAK,
    DSP_SET_ALBUM_PEAK,
    DSP_CROSSFEED
};

enum {
    DSP_CALLBACK_SET_PRESCALE = 0,
    DSP_CALLBACK_SET_BASS,
    DSP_CALLBACK_SET_TREBLE,
    DSP_CALLBACK_SET_CHANNEL_CONFIG,
    DSP_CALLBACK_SET_STEREO_WIDTH
};

/* A bunch of fixed point assembler helper macros */
#if defined(CPU_COLDFIRE)
/* These macros use the Coldfire EMAC extension and need the MACSR flags set
 * to fractional mode with no rounding.
 */

/* Multiply two S.31 fractional integers and return the sign bit and the
 * 31 most significant bits of the result.
 */
#define FRACMUL(x, y) \
({ \
    long t; \
    asm ("mac.l    %[a], %[b], %%acc0\n\t" \
         "movclr.l %%acc0, %[t]\n\t" \
         : [t] "=r" (t) : [a] "r" (x), [b] "r" (y)); \
    t; \
})

/* Multiply two S.31 fractional integers, and return the 32 most significant
 * bits after a shift left by the constant z. NOTE: Only works for shifts of
 * 1 to 8 on Coldfire!
 */
#define FRACMUL_SHL(x, y, z) \
({ \
    long t, t2; \
    asm ("mac.l    %[a], %[b], %%acc0\n\t" \
         "moveq.l  %[d], %[t]\n\t" \
         "move.l   %%accext01, %[t2]\n\t" \
         "and.l    %[mask], %[t2]\n\t" \
         "lsr.l    %[t], %[t2]\n\t" \
         "movclr.l %%acc0, %[t]\n\t" \
         "asl.l    %[c], %[t]\n\t" \
         "or.l     %[t2], %[t]\n\t" \
         : [t] "=&d" (t), [t2] "=&d" (t2) \
         : [a] "r" (x), [b] "r" (y), [mask] "d" (0xff), \
           [c] "i" ((z)), [d] "i" (8 - (z))); \
    t; \
})

#elif defined(CPU_ARM)

/* Multiply two S.31 fractional integers and return the sign bit and the
 * 31 most significant bits of the result.
 */
#define FRACMUL(x, y) \
({ \
    long t, t2; \
    asm ("smull    %[t], %[t2], %[a], %[b]\n\t" \
         "mov      %[t2], %[t2], asl #1\n\t" \
         "orr      %[t], %[t2], %[t], lsr #31\n\t" \
         : [t] "=&r" (t), [t2] "=&r" (t2) \
         : [a] "r" (x), [b] "r" (y)); \
    t; \
})

/* Multiply two S.31 fractional integers, and return the 32 most significant
 * bits after a shift left by the constant z.
 */
#define FRACMUL_SHL(x, y, z) \
({ \
    long t, t2; \
    asm ("smull    %[t], %[t2], %[a], %[b]\n\t" \
         "mov      %[t2], %[t2], asl %[c]\n\t" \
         "orr      %[t], %[t2], %[t], lsr %[d]\n\t" \
         : [t] "=&r" (t), [t2] "=&r" (t2) \
         : [a] "r" (x), [b] "r" (y), \
           [c] "M" ((z) + 1), [d] "M" (31 - (z))); \
    t; \
})

#else

#define FRACMUL(x, y) (long) (((((long long) (x)) * ((long long) (y))) >> 31))
#define FRACMUL_SHL(x, y, z) \
((long)(((((long long) (x)) * ((long long) (y))) >> (31 - (z)))))

#endif

#define DIV64(x, y, z) (long)(((long long)(x) << (z))/(y))

struct dsp_config;

int dsp_process(struct dsp_config *dsp, char *dest,
                const char *src[], int count);
int dsp_input_count(struct dsp_config *dsp, int count);
int dsp_output_count(struct dsp_config *dsp, int count);
intptr_t dsp_configure(struct dsp_config *dsp, int setting,
                       intptr_t value);
void dsp_set_replaygain(void);
void dsp_set_crossfeed(bool enable);
void dsp_set_crossfeed_direct_gain(int gain);
void dsp_set_crossfeed_cross_params(long lf_gain, long hf_gain,
                                    long cutoff);
void dsp_set_eq(bool enable);
void dsp_set_eq_precut(int precut);
void dsp_set_eq_coefs(int band);
void sound_set_pitch(int r);
int sound_get_pitch(void);
int dsp_callback(int msg, intptr_t param);
void dsp_dither_enable(bool enable);

#endif