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rockbox/apps/dsp.h

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Miika Pekkarinen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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
#define STEREO_INTERLEAVED 0
#define STEREO_NONINTERLEAVED 1
#define STEREO_MONO 2
enum {
CODEC_SET_FILEBUF_WATERMARK = 1,
CODEC_SET_FILEBUF_CHUNKSIZE,
CODEC_SET_FILEBUF_PRESEEK,
DSP_SET_FREQUENCY,
DSP_SWITCH_FREQUENCY,
DSP_SET_CLIP_MIN,
DSP_SET_CLIP_MAX,
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
};
/* A bunch of fixed point assembler helper macros */
#if defined(CPU_COLDFIRE) && !defined(SIMULATOR)
/* 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 volatile ("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
* up to 8 on Coldfire!
*/
#define FRACMUL_SHL(x, y, z) \
({ \
long t, t2; \
asm volatile ("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; \
})
/* Multiply one S.31-bit and one S8.23 fractional integer and return the
* sign bit and the 31 most significant bits of the result.
*/
#define FRACMUL_8(x, y) \
({ \
long t; \
long u; \
asm volatile ("mac.l %[a], %[b], %%acc0\n\t" \
"move.l %%accext01, %[u]\n\t" \
"movclr.l %%acc0, %[t]\n\t" \
: [t] "=r" (t), [u] "=r" (u) : [a] "r" (x), [b] "r" (y)); \
(t << 8) | (u & 0xff); \
})
/* Multiply one S.31-bit and one S8.23 fractional integer and return the
* sign bit and the 31 most significant bits of the result. Load next value
* to multiply with into x from s (and increase s); x must contain the
* initial value.
*/
#define FRACMUL_8_LOOP_PART(x, s, d, y) \
{ \
long u; \
asm volatile ("mac.l %[a], %[b], (%[c])+, %[a], %%acc0\n\t" \
"move.l %%accext01, %[u]\n\t" \
"movclr.l %%acc0, %[t]" \
: [a] "+r" (x), [c] "+a" (s), [t] "=r" (d), [u] "=r" (u) \
: [b] "r" (y)); \
d = (d << 8) | (u & 0xff); \
}
#define FRACMUL_8_LOOP(x, y, s, d) \
{ \
long t; \
FRACMUL_8_LOOP_PART(x, s, t, y); \
asm volatile ("move.l %[t],(%[d])+" \
: [d] "+a" (d)\
: [t] "r" (t)); \
}
#define ACC(acc, x, y) \
(void)acc; \
asm volatile ("mac.l %[a], %[b], %%acc0" \
: : [a] "i,r" (x), [b] "i,r" (y));
#define GET_ACC(acc) \
({ \
long t; \
(void)acc; \
asm volatile ("movclr.l %%acc0, %[t]" \
: [t] "=r" (t)); \
t; \
})
#define ACC_INIT(acc, x, y) ACC(acc, x, y)
#elif defined(CPU_ARM) && !defined(SIMULATOR)
/* 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 volatile ("smull r0, r1, %[a], %[b]\n\t" \
"mov %[t], r1, asl #1\n\t" \
"orr %[t], %[t], r0, lsr #31\n\t" \
: [t] "=r" (t) : [a] "r" (x), [b] "r" (y) : "r0", "r1"); \
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; \
asm volatile ("smull r0, r1, %[a], %[b]\n\t" \
"mov %[t], r1, asl %[c]\n\t" \
"orr %[t], %[t], r0, lsr %[d]\n\t" \
: [t] "=r" (t) \
: [a] "r" (x), [b] "r" (y), \
[c] "M" ((z) + 1), [d] "M" (31 - (z)) \
: "r0", "r1"); \
t; \
})
#define ACC_INIT(acc, x, y) acc = FRACMUL(x, y)
#define ACC(acc, x, y) acc += FRACMUL(x, y)
#define GET_ACC(acc) acc
/* Multiply one S.31-bit and one S8.23 fractional integer and store the
* sign bit and the 31 most significant bits of the result to d (and
* increase d). Load next value to multiply with into x from s (and
* increase s); x must contain the initial value.
*/
#define FRACMUL_8_LOOP(x, y, s, d) \
({ \
asm volatile ("smull r0, r1, %[a], %[b]\n\t" \
"mov %[t], r1, asl #9\n\t" \
"orr %[t], %[t], r0, lsr #23\n\t" \
: [t] "=r" (*(d)++) : [a] "r" (x), [b] "r" (y) : "r0", "r1"); \
x = *(s)++; \
})
#else
#define ACC_INIT(acc, x, y) acc = FRACMUL(x, y)
#define ACC(acc, x, y) acc += FRACMUL(x, y)
#define GET_ACC(acc) acc
#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)))))
#define FRACMUL_8(x, y) (long) (((((long long) (x)) * ((long long) (y))) >> 23))
#define FRACMUL_8_LOOP(x, y, s, d) \
({ \
long t = x; \
x = *(s)++; \
*(d)++ = (long) (((((long long) (t)) * ((long long) (y))) >> 23)); \
})
#endif
#define DIV64(x, y, z) (long)(((long long)(x) << (z))/(y))
long dsp_process(char *dest, const char *src[], long size);
long dsp_input_size(long size);
long dsp_output_size(long size);
int dsp_stereo_mode(void);
bool dsp_configure(int setting, void *value);
void dsp_set_replaygain(bool always);
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);
void channels_set(int value);
void stereo_width_set(int value);
void dsp_dither_enable(bool enable);
#endif
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