+++ /dev/null
-/*
- 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
+++ /dev/null
-/*
- 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 */
-
-//@@@@@@@
projects / ardour.git / commitdiff