[Freeswitch-svn] [commit] r8374 - freeswitch/trunk/libs/voipcodecs/src
Freeswitch SVN
mikej at freeswitch.org
Mon May 12 20:30:10 EDT 2008
Author: mikej
Date: Mon May 12 20:30:09 2008
New Revision: 8374
Added:
freeswitch/trunk/libs/voipcodecs/src/bit_operations.c
Modified:
freeswitch/trunk/libs/voipcodecs/src/Makefile.am
Log:
fix for LBCODEC-2
Modified: freeswitch/trunk/libs/voipcodecs/src/Makefile.am
==============================================================================
--- freeswitch/trunk/libs/voipcodecs/src/Makefile.am (original)
+++ freeswitch/trunk/libs/voipcodecs/src/Makefile.am Mon May 12 20:30:09 2008
@@ -27,6 +27,7 @@
lib_LTLIBRARIES = libvoipcodecs.la
libvoipcodecs_la_SOURCES = bitstream.c \
+ bit_operations.c \
g711.c \
g722_encode.c \
g722_decode.c \
Added: freeswitch/trunk/libs/voipcodecs/src/bit_operations.c
==============================================================================
--- (empty file)
+++ freeswitch/trunk/libs/voipcodecs/src/bit_operations.c Mon May 12 20:30:09 2008
@@ -0,0 +1,180 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * bit_operations.c - Various bit level operations, such as bit reversal
+ *
+ * Written by Steve Underwood <steveu at coppice.org>
+ *
+ * Copyright (C) 2006 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1,
+ * as published by the Free Software Foundation.
+ *
+ * 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: bit_operations.c,v 1.13 2008/04/17 14:26:56 steveu Exp $
+ */
+
+/*! \file */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <inttypes.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <assert.h>
+#include <memory.h>
+
+#include "voipcodecs/telephony.h"
+#include "voipcodecs/bit_operations.h"
+
+uint16_t bit_reverse16(uint16_t x)
+{
+ x = (x >> 8) | (x << 8);
+ x = ((x & 0xF0F0) >> 4) | ((x & 0x0F0F) << 4);
+ x = ((x & 0xCCCC) >> 2) | ((x & 0x3333) << 2);
+ return ((x & 0xAAAA) >> 1) | ((x & 0x5555) << 1);
+}
+/*- End of function --------------------------------------------------------*/
+
+uint32_t bit_reverse32(uint32_t x)
+{
+ x = (x >> 16) | (x << 16);
+ x = ((x & 0xFF00FF00) >> 8) | ((x & 0x00FF00FF) << 8);
+ x = ((x & 0xF0F0F0F0) >> 4) | ((x & 0x0F0F0F0F) << 4);
+ x = ((x & 0xCCCCCCCC) >> 2) | ((x & 0x33333333) << 2);
+ return ((x & 0xAAAAAAAA) >> 1) | ((x & 0x55555555) << 1);
+}
+/*- End of function --------------------------------------------------------*/
+
+uint32_t bit_reverse_4bytes(uint32_t x)
+{
+ x = ((x & 0xF0F0F0F0) >> 4) | ((x & 0x0F0F0F0F) << 4);
+ x = ((x & 0xCCCCCCCC) >> 2) | ((x & 0x33333333) << 2);
+ return ((x & 0xAAAAAAAA) >> 1) | ((x & 0x55555555) << 1);
+}
+/*- End of function --------------------------------------------------------*/
+
+#if defined(__x86_64__)
+uint64_t bit_reverse_8bytes(uint64_t x)
+{
+ x = ((x & 0xF0F0F0F0F0F0F0F0LLU) >> 4) | ((x & 0x0F0F0F0F0F0F0F0FLLU) << 4);
+ x = ((x & 0xCCCCCCCCCCCCCCCCLLU) >> 2) | ((x & 0x3333333333333333LLU) << 2);
+ return ((x & 0xAAAAAAAAAAAAAAAALLU) >> 1) | ((x & 0x5555555555555555LLU) << 1);
+}
+/*- End of function --------------------------------------------------------*/
+#endif
+
+void bit_reverse(uint8_t to[], const uint8_t from[], int len)
+{
+#if defined(__sparc__) || defined(__sparc)
+ int i;
+#else
+ const uint8_t *y1;
+ uint8_t *z1;
+ const uint32_t *y4;
+ uint32_t *z4;
+ uint32_t x4;
+#if defined(__x86_64__)
+ const uint64_t *y8;
+ uint64_t *z8;
+ uint64_t x8;
+#endif
+#endif
+
+#if defined(__sparc__) || defined(__sparc)
+ /* This code work 8 bits at a time, so it works on machines where misalignment
+ is either desperately slow or fails */
+ for (i = 0; i < len; i++)
+ to[i] = bit_reverse8(from[i]);
+#else
+ /* This code is this is based on the woolly assumption that the start of the buffers
+ is memory aligned. If it isn't, the routine will be less efficient on some machines,
+ but might not work at all on others. */
+#if defined(__x86_64__)
+ y8 = (const uint64_t *) from;
+ z8 = (uint64_t *) to;
+ while (len >= sizeof(uint64_t))
+ {
+ x8 = *y8++;
+ x8 = ((x8 & 0xF0F0F0F0F0F0F0F0LLU) >> 4) | ((x8 & 0x0F0F0F0F0F0F0F0FLLU) << 4);
+ x8 = ((x8 & 0xCCCCCCCCCCCCCCCCLLU) >> 2) | ((x8 & 0x3333333333333333LLU) << 2);
+ *z8++ = ((x8 & 0xAAAAAAAAAAAAAAAALLU) >> 1) | ((x8 & 0x5555555555555555LLU) << 1);
+ len -= sizeof(uint64_t);
+ }
+ y4 = (const uint32_t *) y8;
+ z4 = (uint32_t *) z8;
+#else
+ y4 = (const uint32_t *) from;
+ z4 = (uint32_t *) to;
+#endif
+ while (len >= sizeof(uint32_t))
+ {
+ x4 = *y4++;
+ x4 = ((x4 & 0xF0F0F0F0) >> 4) | ((x4 & 0x0F0F0F0F) << 4);
+ x4 = ((x4 & 0xCCCCCCCC) >> 2) | ((x4 & 0x33333333) << 2);
+ *z4++ = ((x4 & 0xAAAAAAAA) >> 1) | ((x4 & 0x55555555) << 1);
+ len -= sizeof(uint32_t);
+ }
+ y1 = (const uint8_t *) y4;
+ z1 = (uint8_t *) z4;
+ while (len-- > 0)
+ *z1++ = bit_reverse8(*y1++);
+#endif
+}
+/*- End of function --------------------------------------------------------*/
+
+int one_bits32(uint32_t x)
+{
+ x = x - ((x >> 1) & 0x55555555);
+ /* We now have 16 2-bit counts */
+ x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+ /* We now have 8 4-bit counts */
+ x = (x + (x >> 4)) & 0x0F0F0F0F;
+ /* We now have 4 8-bit counts */
+#if defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || defined(__powerpc__)
+ /* If multiply is fast */
+ return (x*0x01010101) >> 24;
+#else
+ /* If multiply is slow */
+ x += (x >> 8);
+ x += (x >> 16);
+ return (x & 0x0000003F);
+#endif
+}
+/*- End of function --------------------------------------------------------*/
+
+uint32_t make_mask32(uint32_t x)
+{
+ x |= (x >> 1);
+ x |= (x >> 2);
+ x |= (x >> 4);
+ x |= (x >> 8);
+ x |= (x >> 16);
+ return x;
+}
+/*- End of function --------------------------------------------------------*/
+
+uint16_t make_mask16(uint16_t x)
+{
+ x |= (x >> 1);
+ x |= (x >> 2);
+ x |= (x >> 4);
+ x |= (x >> 8);
+ return x;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/
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