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Amazing PCM byte/array convert functions, unused.

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This commit is contained in:
Robin Gareus
2019-02-28 18:52:10 +01:00
parent 65d147fcc9
commit 2a8d3ff4f0
3 changed files with 0 additions and 221 deletions
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41
libs/ardour/ardour/pcm_utils.h
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@@ -1,41 +0,0 @@
/*
Copyright (C) 2006 Paul Davis , portions Erik de Castro Lopo
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.
*/
#ifndef __ardour_pcm_utils_h__
#define __ardour_pcm_utils_h__
typedef void tribyte ;
#define SIZEOF_TRIBYTE 3
#define BET2H_INT_PTR(x) (((x) [0] << 24) + ((x) [1] << 16) + ((x) [2] << 8))
#define LET2H_INT_PTR(x) (((x) [0] << 8) + ((x) [1] << 16) + ((x) [2] << 24))
void pcm_let2f_array (tribyte *src, int count, float *dest);
void pcm_bet2f_array (tribyte *src, int count, float *dest);
void pcm_f2let_array (float *src, tribyte *dest, int count);
void pcm_f2let_clip_array (float *src, tribyte *dest, int count);
void pcm_f2bet_array (const float *src, tribyte *dest, int count);
void pcm_f2bet_clip_array (const float *src, tribyte *dest, int count);
#endif

179
libs/ardour/pcm_utils.cc
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@@ -1,179 +0,0 @@
/*
Copyright (C) 2006 Paul Davis , portions Erik de Castro Lopo
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.
*/
#ifdef COMPILER_MSVC
#include <ardourext/float_cast.h>
#endif
#include "ardour/pcm_utils.h"
#include <cmath>
using namespace std;
// TODO: check CPU_CLIPS_POSITIVE and CPU_CLIPS_NEGATIVE with scons
#define CPU_CLIPS_NEGATIVE 0
#define CPU_CLIPS_POSITIVE 0
/* these routines deal with 24 bit int handling (tribytes)
* originally from libsndfile, but modified. XXX - Copyright Erik de Castro Lopo
*/
void
pcm_let2f_array (tribyte *src, int count, float *dest)
{
/* Special normfactor because tribyte value is read into an int. */
static const float normfact = 1.0 / ((float) 0x80000000);
unsigned char *ucptr ;
int value ;
ucptr = ((unsigned char*) src) + 3 * count ;
while (--count >= 0)
{ ucptr -= 3 ;
value = LET2H_INT_PTR (ucptr) ;
dest [count] = ((float) value) * normfact ;
} ;
} /* let2f_array */
void
pcm_bet2f_array (tribyte *src, int count, float *dest)
{
/* Special normfactor because tribyte value is read into an int. */
static const float normfact = 1.0 / ((float) 0x80000000);
unsigned char *ucptr ;
int value ;
ucptr = ((unsigned char*) src) + 3 * count ;
while (--count >= 0)
{ ucptr -= 3 ;
value = BET2H_INT_PTR (ucptr) ;
dest [count] = ((float) value) * normfact ;
} ;
} /* bet2f_array */
void
pcm_f2let_array (float *src, tribyte *dest, int count)
{
static const float normfact = (1.0 * 0x7FFFFF);
unsigned char *ucptr ;
int value ;
ucptr = ((unsigned char*) dest) + 3 * count ;
while (count)
{ count -- ;
ucptr -= 3 ;
value = lrintf (src [count] * normfact) ;
ucptr [0] = value ;
ucptr [1] = value >> 8 ;
ucptr [2] = value >> 16 ;
} ;
} /* f2let_array */
void
pcm_f2let_clip_array (float *src, tribyte *dest, int count)
{
static const float normfact = (8.0 * 0x10000000);
unsigned char *ucptr ;
float scaled_value ;
int value ;
ucptr = ((unsigned char*) dest) + 3 * count ;
while (count)
{ count -- ;
ucptr -= 3 ;
scaled_value = src [count] * normfact ;
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
{ ucptr [0] = 0xFF ;
ucptr [1] = 0xFF ;
ucptr [2] = 0x7F ;
continue ;
} ;
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
{ ucptr [0] = 0x00 ;
ucptr [1] = 0x00 ;
ucptr [2] = 0x80 ;
continue ;
} ;
value = lrintf (scaled_value) ;
ucptr [0] = value >> 8 ;
ucptr [1] = value >> 16 ;
ucptr [2] = value >> 24 ;
} ;
} /* f2let_clip_array */
void
pcm_f2bet_array (const float *src, tribyte *dest, int count)
{
static const float normfact = (1.0 * 0x7FFFFF);
unsigned char *ucptr ;
int value ;
ucptr = ((unsigned char*) dest) + 3 * count ;
while (--count >= 0)
{ ucptr -= 3 ;
value = lrintf (src [count] * normfact) ;
ucptr [0] = value >> 16 ;
ucptr [1] = value >> 8 ;
ucptr [2] = value ;
} ;
} /* f2bet_array */
void
pcm_f2bet_clip_array (const float *src, tribyte *dest, int count)
{
static const float normfact = (8.0 * 0x10000000);
unsigned char *ucptr ;
float scaled_value ;
int value ;
ucptr = ((unsigned char*) dest) + 3 * count ;
while (--count >= 0)
{ ucptr -= 3 ;
scaled_value = src [count] * normfact ;
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
{ ucptr [0] = 0x7F ;
ucptr [1] = 0xFF ;
ucptr [2] = 0xFF ;
continue ;
} ;
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
{ ucptr [0] = 0x80 ;
ucptr [1] = 0x00 ;
ucptr [2] = 0x00 ;
continue ;
} ;
value = lrint (scaled_value) ;
ucptr [0] = value >> 24 ;
ucptr [1] = value >> 16 ;
ucptr [2] = value >> 8 ;
} ;
} /* f2bet_clip_array */
//@@@@@@@

1
libs/ardour/wscript
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@@ -162,7 +162,6 @@ libardour_sources = [
'panner_manager.cc',
'panner_shell.cc',
'parameter_descriptor.cc',
'pcm_utils.cc',
'phase_control.cc',
'playlist.cc',
'playlist_factory.cc',