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/***************************************************************************
* __________ __ ___.
* 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
{
CODEC_SET_FILEBUF_WATERMARK = 1,
DSP_MYDSP,
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
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