memops.c 28.9 KB
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/*
    Copyright (C) 2000 Paul Davis 

    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 program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: memops.c,v 1.2 2005/08/29 10:36:28 letz Exp $
*/

#define _ISOC9X_SOURCE  1
#define _ISOC99_SOURCE  1

#define __USE_ISOC9X    1
#define __USE_ISOC99    1

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <memory.h>
#include <stdlib.h>
#include <limits.h>
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#include <endian.h>
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#include "memops.h"


#define SAMPLE_MAX_24BIT  8388608.0f
#define SAMPLE_MAX_16BIT  32768.0f

#define f_round(f) lrintf(f)

/* Linear Congruential noise generator. From the music-dsp list
 * less random than rand(), but good enough and 10x faster */
inline unsigned int fast_rand();

inline unsigned int fast_rand() {
	static unsigned int seed = 22222;
	seed = (seed * 96314165) + 907633515;

	return seed;
}

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/* functions for native float sample data */


void sample_move_floatLE_sSs (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip) {
       while (nsamples--) {
               *dst = *((float *) src);
               dst++;
               src += src_skip;
       }
}

void sample_move_dS_floatLE (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state) {
       while (nsamples--) {
               *((float *) dst) = *src;
               dst += dst_skip;
               src++;
       }
}


/* functions for native integer sample data */


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void sample_move_d32u24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
        long long y;
	int z;

	while (nsamples--) {
		y = (long long)(*src * SAMPLE_MAX_24BIT) << 8;
		if (y > INT_MAX) {
			z = INT_MAX;
		} else if (y < INT_MIN) {
			z = INT_MIN;
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>24);
		dst[1]=(char)(z>>16);
		dst[2]=(char)(z>>8);
		dst[3]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
		dst[3]=(char)(z>>24);
#endif
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
        long long y;

	while (nsamples--) {
		y = (long long)(*src * SAMPLE_MAX_24BIT) << 8;
		if (y > INT_MAX) {
			*((int *) dst) = INT_MAX;
		} else if (y < INT_MIN) {
			*((int *) dst) = INT_MIN;
		} else {
			*((int *) dst) = (int)y;
		}
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dS_s32u24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		x = (unsigned char)(src[0]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[3]);
#elif __BYTE_ORDER == __BIG_ENDIAN
		x = (unsigned char)(src[3]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[0]);
#endif
		*dst = (x >> 8) / SAMPLE_MAX_24BIT;
		dst++;
		src += src_skip;
	}
}	

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void sample_move_dS_s32u24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		*dst = (*((int *) src) >> 8) / SAMPLE_MAX_24BIT;
		dst++;
		src += src_skip;
	}
}	

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void sample_move_dither_rect_d32u24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
	/* ALERT: signed sign-extension portability !!! */
	jack_default_audio_sample_t  x;
	long long y;
	int z;

	while (nsamples--) {
		x = *src * SAMPLE_MAX_16BIT;
		x -= (float)fast_rand() / (float)INT_MAX;
		y = (long long)f_round(x);
		y <<= 16;
		if (y > INT_MAX) {
			z = INT_MAX;
		} else if (y < INT_MIN) {
			z = INT_MIN;
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>24);
		dst[1]=(char)(z>>16);
		dst[2]=(char)(z>>8);
		dst[3]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
		dst[3]=(char)(z>>24);
#endif
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dither_rect_d32u24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
	/* ALERT: signed sign-extension portability !!! */
	jack_default_audio_sample_t  x;
	long long y;

	while (nsamples--) {
		x = *src * SAMPLE_MAX_16BIT;
		x -= (float)fast_rand() / (float)INT_MAX;
		y = (long long)f_round(x);
		y <<= 16;
		if (y > INT_MAX) {
			*((int *) dst) = INT_MAX;
		} else if (y < INT_MIN) {
			*((int *) dst) = INT_MIN;
		} else {
			*((int *) dst) = (int)y;
		}
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dither_tri_d32u24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t  x;
	float     r;
	float     rm1 = state->rm1;
	long long y;
	int z;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = (long long)f_round(x);
		y <<= 16;

		if (y > INT_MAX) {
			z = INT_MAX;
		} else if (y < INT_MIN) {
			z = INT_MIN;
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>24);
		dst[1]=(char)(z>>16);
		dst[2]=(char)(z>>8);
		dst[3]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
		dst[3]=(char)(z>>24);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_tri_d32u24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t  x;
	float     r;
	float     rm1 = state->rm1;
	long long y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = (long long)f_round(x);
		y <<= 16;

		if (y > INT_MAX) {
			*((int *) dst) = INT_MAX;
		} else if (y < INT_MIN) {
			*((int *) dst) = INT_MIN;
		} else {
			*((int *) dst) = (int)y;
		}

		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_shaped_d32u24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	long long    y;
	int z;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = (long long)f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

		y <<= 16;

		if (y > INT_MAX) {
			z = INT_MAX;
		} else if (y < INT_MIN) {
			z = INT_MIN;
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>24);
		dst[1]=(char)(z>>16);
		dst[2]=(char)(z>>8);
		dst[3]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
		dst[3]=(char)(z>>24);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

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void sample_move_dither_shaped_d32u24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	long long    y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = (long long)f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

		y <<= 16;

		if (y > INT_MAX) {
			*((int *) dst) = INT_MAX;
		} else if (y < INT_MIN) {
			*((int *) dst) = INT_MIN;
		} else {
			*((int *) dst) = y;
		}
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

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void sample_move_d24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
        long long y;
	int z;

	while (nsamples--) {
		y = (long long)(*src * SAMPLE_MAX_24BIT);

		if (y > (INT_MAX >> 8 )) {
			z = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8 )) {
			z = (INT_MIN >> 8 );
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>16);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
#endif
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_d24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
        long long y;

	while (nsamples--) {
		y = (long long)(*src * SAMPLE_MAX_24BIT);

		if (y > (INT_MAX >> 8 )) {
			y = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8 )) {
			y = (INT_MIN >> 8 );
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy (dst, &y, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy (dst, (char *)&y + 5, 3);
#endif
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dS_s24s (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		x = (unsigned char)(src[0]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[2]);
		/* correct sign bit and the rest of the top byte */
		if (src[0] & 0x80) {
			x |= 0xff << 24;
		}
#elif __BYTE_ORDER == __BIG_ENDIAN
		x = (unsigned char)(src[2]);
		x <<= 8;
		x |= (unsigned char)(src[1]);
		x <<= 8;
		x |= (unsigned char)(src[0]);
		/* correct sign bit and the rest of the top byte */
		if (src[0] & 0x80) {
			x |= 0xff << 24;
		}
#endif
		*dst = x / SAMPLE_MAX_24BIT;
		dst++;
		src += src_skip;
	}
}	

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void sample_move_dS_s24 (jack_default_audio_sample_t *dst, char *src, unsigned long nsamples, unsigned long src_skip)
{
	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		int x;
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy((char*)&x + 1, src, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy(&x, src, 3);
#endif
		x >>= 8;
		*dst = x / SAMPLE_MAX_24BIT;
		dst++;
		src += src_skip;
	}
}	

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void sample_move_dither_rect_d24_sSs (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
	/* ALERT: signed sign-extension portability !!! */
	jack_default_audio_sample_t  x;
	long long y;
	int z;

	while (nsamples--) {
		x = *src * SAMPLE_MAX_16BIT;
		x -= (float)fast_rand() / (float)INT_MAX;
		y = (long long)f_round(x);

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			z = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			z = (INT_MIN >> 8);
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>16);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
#endif
		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dither_rect_d24_sS (char *dst, jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)

{
	/* ALERT: signed sign-extension portability !!! */
	jack_default_audio_sample_t  x;
	long long y;

	while (nsamples--) {
		x = *src * SAMPLE_MAX_16BIT;
		x -= (float)fast_rand() / (float)INT_MAX;
		y = (long long)f_round(x);

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			y = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			y = (INT_MIN >> 8);
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy (dst, &y, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy (dst, (char *)&y + 5, 3);
#endif

		dst += dst_skip;
		src++;
	}
}	

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void sample_move_dither_tri_d24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t  x;
	float     r;
	float     rm1 = state->rm1;
	long long y;
	int z;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = (long long)f_round(x);

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			z = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			z = (INT_MIN >> 8);
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>16);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_tri_d24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t  x;
	float     r;
	float     rm1 = state->rm1;
	long long y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = (long long)f_round(x);

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			y = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			y = (INT_MIN >> 8);
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy (dst, &y, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy (dst, (char *)&y + 5, 3);
#endif

		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_shaped_d24_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	long long    y;
	int z;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = (long long)f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			z = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			z = (INT_MIN >> 8);
		} else {
			z = (int)y;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(z>>16);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(z);
		dst[1]=(char)(z>>8);
		dst[2]=(char)(z>>16);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

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void sample_move_dither_shaped_d24_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	long long    y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = (long long)f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

		y <<= 8;

		if (y > (INT_MAX >> 8)) {
			y = (INT_MAX >> 8);
		} else if (y < (INT_MIN >> 8)) {
			y = (INT_MIN >> 8);
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		memcpy (dst, &y, 3);
#elif __BYTE_ORDER == __BIG_ENDIAN
		memcpy (dst, (char *)&y + 5, 3);
#endif

		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

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void sample_move_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	int tmp;

	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		tmp = f_round(*src * SAMPLE_MAX_16BIT);
		if (tmp > SHRT_MAX) {
			tmp = SHRT_MAX;
		} else if (tmp < SHRT_MIN) {
			tmp = SHRT_MIN;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(tmp>>8);
		dst[1]=(char)(tmp);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(tmp);
		dst[1]=(char)(tmp>>8);
#endif
		dst += dst_skip;
		src++;
	}
}

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void sample_move_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	int tmp;

	/* ALERT: signed sign-extension portability !!! */

	while (nsamples--) {
		tmp = f_round(*src * SAMPLE_MAX_16BIT);
		if (tmp > SHRT_MAX) {
			*((short *)dst) = SHRT_MAX;
		} else if (tmp < SHRT_MIN) {
			*((short *)dst) = SHRT_MIN;
		} else {
			*((short *) dst) = (short) tmp;
		}
		dst += dst_skip;
		src++;
	}
}

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void sample_move_dither_rect_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t val;
	int      tmp;

	while (nsamples--) {
		val = *src * (float)SAMPLE_MAX_16BIT;
		val -= (float)fast_rand() / (float)INT_MAX;
		tmp = f_round(val);
		if (tmp > SHRT_MAX) {
			tmp = SHRT_MAX;
		} else if (tmp < SHRT_MIN) {
			tmp = SHRT_MIN;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(tmp>>8);
		dst[1]=(char)(tmp);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(tmp);
		dst[1]=(char)(tmp>>8);
#endif
		dst += dst_skip;
		src++;
	}
}

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void sample_move_dither_rect_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t val;
	int      tmp;

	while (nsamples--) {
		val = *src * (float)SAMPLE_MAX_16BIT;
		val -= (float)fast_rand() / (float)INT_MAX;
		tmp = f_round(val);
		if (tmp > SHRT_MAX) {
			*((short *)dst) = SHRT_MAX;
		} else if (tmp < SHRT_MIN) {
			*((short *)dst) = SHRT_MIN;
		} else {
			*((short *) dst) = (short)tmp;
		}
		dst += dst_skip;
		src++;
	}
}

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void sample_move_dither_tri_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t x;
	float    r;
	float    rm1 = state->rm1;
	int      y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = f_round(x);

		if (y > SHRT_MAX) {
			y = SHRT_MAX;
		} else if (y < SHRT_MIN) {
			y = SHRT_MIN;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(y>>8);
		dst[1]=(char)(y);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(y);
		dst[1]=(char)(y>>8);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_tri_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t x;
	float    r;
	float    rm1 = state->rm1;
	int      y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		x += r - rm1;
		rm1 = r;
		y = f_round(x);

		if (y > SHRT_MAX) {
			*((short *)dst) = SHRT_MAX;
		} else if (y < SHRT_MIN) {
			*((short *)dst) = SHRT_MIN;
		} else {
			*((short *) dst) = (short)y;
		}

		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
}

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void sample_move_dither_shaped_d16_sSs (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	int          y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

		if (y > SHRT_MAX) {
			y = SHRT_MAX;
		} else if (y < SHRT_MIN) {
			y = SHRT_MIN;
		}
#if __BYTE_ORDER == __LITTLE_ENDIAN
		dst[0]=(char)(y>>8);
		dst[1]=(char)(y);
#elif __BYTE_ORDER == __BIG_ENDIAN
		dst[0]=(char)(y);
		dst[1]=(char)(y>>8);
#endif
		dst += dst_skip;
		src++;
	}
	state->rm1 = rm1;
	state->idx = idx;
}

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void sample_move_dither_shaped_d16_sS (char *dst,  jack_default_audio_sample_t *src, unsigned long nsamples, unsigned long dst_skip, dither_state_t *state)
	
{
	jack_default_audio_sample_t     x;
	jack_default_audio_sample_t     xe; /* the innput sample - filtered error */
	jack_default_audio_sample_t     xp; /* x' */
	float        r;
	float        rm1 = state->rm1;
	unsigned int idx = state->idx;
	int          y;

	while (nsamples--) {
		x = *src * (float)SAMPLE_MAX_16BIT;
		r = 2.0f * (float)fast_rand() / (float)INT_MAX - 1.0f;
		/* Filter the error with Lipshitz's minimally audible FIR:
		   [2.033 -2.165 1.959 -1.590 0.6149] */
		xe = x
		     - state->e[idx] * 2.033f
		     + state->e[(idx - 1) & DITHER_BUF_MASK] * 2.165f
		     - state->e[(idx - 2) & DITHER_BUF_MASK] * 1.959f
		     + state->e[(idx - 3) & DITHER_BUF_MASK] * 1.590f
		     - state->e[(idx - 4) & DITHER_BUF_MASK] * 0.6149f;
		xp = xe + r - rm1;
		rm1 = r;

		/* This could be some inline asm on x86 */
		y = f_round(xp);

		/* Intrinsic z^-1 delay */
		idx = (idx + 1) & DITHER_BUF_MASK;
		state->e[idx] = y - xe;

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