/* * * Bluetooth low-complexity, subband codec (SBC) library * * Copyright (C) 2008-2010 Nokia Corporation * Copyright (C) 2004-2010 Marcel Holtmann * Copyright (C) 2004-2005 Henryk Ploetz * Copyright (C) 2005-2008 Brad Midgley * * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #define fabs(x) ((x) < 0 ? -(x) : (x)) /* C does not provide an explicit arithmetic shift right but this will always be correct and every compiler *should* generate optimal code */ #define ASR(val, bits) ((-2 >> 1 == -1) ? \ ((int32_t)(val)) >> (bits) : ((int32_t) (val)) / (1 << (bits))) #define SCALE_SPROTO4_TBL 12 #define SCALE_SPROTO8_TBL 14 #define SCALE_NPROTO4_TBL 11 #define SCALE_NPROTO8_TBL 11 #define SCALE4_STAGED1_BITS 15 #define SCALE4_STAGED2_BITS 16 #define SCALE8_STAGED1_BITS 15 #define SCALE8_STAGED2_BITS 16 typedef int32_t sbc_fixed_t; #define SCALE4_STAGED1(src) ASR(src, SCALE4_STAGED1_BITS) #define SCALE4_STAGED2(src) ASR(src, SCALE4_STAGED2_BITS) #define SCALE8_STAGED1(src) ASR(src, SCALE8_STAGED1_BITS) #define SCALE8_STAGED2(src) ASR(src, SCALE8_STAGED2_BITS) #define SBC_FIXED_0(val) { val = 0; } #define MUL(a, b) ((a) * (b)) #if defined(__arm__) && (!defined(__thumb__) || defined(__thumb2__)) #define MULA(a, b, res) ({ \ int tmp = res; \ __asm__( \ "mla %0, %2, %3, %0" \ : "=&r" (tmp) \ : "0" (tmp), "r" (a), "r" (b)); \ tmp; }) #else #define MULA(a, b, res) ((a) * (b) + (res)) #endif