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@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 ------------------------------------------------------------*/