Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavutil / fixed_dsp.c
CommitLineData
2ba45a60
DM
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}