1/* 2 * Copyright (c) 2012 3 * MIPS Technologies, Inc., California. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Author: Nedeljko Babic (nbabic@mips.com) 30 * 31 * This file is part of FFmpeg. 32 * 33 * FFmpeg is free software; you can redistribute it and/or 34 * modify it under the terms of the GNU Lesser General Public 35 * License as published by the Free Software Foundation; either 36 * version 2.1 of the License, or (at your option) any later version. 37 * 38 * FFmpeg is distributed in the hope that it will be useful, 39 * but WITHOUT ANY WARRANTY; without even the implied warranty of 40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 41 * Lesser General Public License for more details. 42 * 43 * You should have received a copy of the GNU Lesser General Public 44 * License along with FFmpeg; if not, write to the Free Software 45 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 46 */ 47 48#include "fixed_dsp.h" 49 50static void vector_fmul_window_fixed_scaled_c(int16_t *dst, const int32_t *src0, 51 const int32_t *src1, const int32_t *win, 52 int len, uint8_t bits) 53{ 54 int32_t s0, s1, wi, wj, i,j, round; 55 56 dst += len; 57 win += len; 58 src0+= len; 59 round = bits? 1 << (bits-1) : 0; 60 61 for (i=-len, j=len-1; i<0; i++, j--) { 62 s0 = src0[i]; 63 s1 = src1[j]; 64 wi = win[i]; 65 wj = win[j]; 66 dst[i] = av_clip_int16_c(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits); 67 dst[j] = av_clip_int16_c(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits); 68 } 69} 70 71static void vector_fmul_window_fixed_c(int32_t *dst, const int32_t *src0, 72 const int32_t *src1, const int32_t *win, 73 int len) 74{ 75 int32_t s0, s1, wi, wj, i, j; 76 77 dst += len; 78 win += len; 79 src0+= len; 80 81 for (i=-len, j=len-1; i<0; i++, j--) { 82 s0 = src0[i]; 83 s1 = src1[j]; 84 wi = win[i]; 85 wj = win[j]; 86 dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31; 87 dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31; 88 } 89} 90 91AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact) 92{ 93 AVFixedDSPContext * fdsp = av_malloc(sizeof(AVFixedDSPContext)); 94 fdsp->vector_fmul_window_scaled = vector_fmul_window_fixed_scaled_c; 95 fdsp->vector_fmul_window = vector_fmul_window_fixed_c; 96 97 return fdsp; 98} 99