| /* |
| * Copyright (c) 2012 |
| * MIPS Technologies, Inc., California. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * Author: Nedeljko Babic (nbabic@mips.com) |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "fixed_dsp.h" |
| |
| static void vector_fmul_window_fixed_scaled_c(int16_t *dst, const int32_t *src0, |
| const int32_t *src1, const int32_t *win, |
| int len, uint8_t bits) |
| { |
| int32_t s0, s1, wi, wj, i,j, round; |
| |
| dst += len; |
| win += len; |
| src0+= len; |
| round = bits? 1 << (bits-1) : 0; |
| |
| for (i=-len, j=len-1; i<0; i++, j--) { |
| s0 = src0[i]; |
| s1 = src1[j]; |
| wi = win[i]; |
| wj = win[j]; |
| dst[i] = av_clip_int16_c(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits); |
| dst[j] = av_clip_int16_c(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits); |
| } |
| } |
| |
| static void vector_fmul_window_fixed_c(int32_t *dst, const int32_t *src0, |
| const int32_t *src1, const int32_t *win, |
| int len) |
| { |
| int32_t s0, s1, wi, wj, i, j; |
| |
| dst += len; |
| win += len; |
| src0+= len; |
| |
| for (i=-len, j=len-1; i<0; i++, j--) { |
| s0 = src0[i]; |
| s1 = src1[j]; |
| wi = win[i]; |
| wj = win[j]; |
| dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31; |
| dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31; |
| } |
| } |
| |
| AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact) |
| { |
| AVFixedDSPContext * fdsp = av_malloc(sizeof(AVFixedDSPContext)); |
| fdsp->vector_fmul_window_scaled = vector_fmul_window_fixed_scaled_c; |
| fdsp->vector_fmul_window = vector_fmul_window_fixed_c; |
| |
| return fdsp; |
| } |