3 * MIPS Technologies, Inc., California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 * Author: Nedeljko Babic (nbabic@mips.com)
31 * This file is part of FFmpeg.
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.
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.
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
48 #include "fixed_dsp.h"
50 static 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
)
54 int32_t s0
, s1
, wi
, wj
, i
,j
, round
;
59 round
= bits
? 1 << (bits
-1) : 0;
61 for (i
=-len
, j
=len
-1; i
<0; i
++, 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
);
71 static void vector_fmul_window_fixed_c(int32_t *dst
, const int32_t *src0
,
72 const int32_t *src1
, const int32_t *win
,
75 int32_t s0
, s1
, wi
, wj
, i
, j
;
81 for (i
=-len
, j
=len
-1; i
<0; i
++, 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;
91 AVFixedDSPContext
* avpriv_alloc_fixed_dsp(int bit_exact
)
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
;