amrwbdec_mips.c
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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
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37  *
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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
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46  */
47 
48 /**
49  * @file
50  * Reference: libavcodec/amrwbdec.c
51  */
52 #include "libavutil/avutil.h"
53 #include "libavcodec/amrwbdata.h"
54 #include "amrwbdec_mips.h"
55 
56 #if HAVE_INLINE_ASM
57 void hb_fir_filter_mips(float *out, const float fir_coef[HB_FIR_SIZE + 1],
58  float mem[HB_FIR_SIZE], const float *in)
59 {
60  int i;
61  float data[AMRWB_SFR_SIZE_16k + HB_FIR_SIZE]; // past and current samples
62 
63  memcpy(data, mem, HB_FIR_SIZE * sizeof(float));
64  memcpy(data + HB_FIR_SIZE, in, AMRWB_SFR_SIZE_16k * sizeof(float));
65 
66  for (i = 0; i < AMRWB_SFR_SIZE_16k; i++) {
67  float output;
68  float * p_data = (data+i);
69 
70  /**
71  * inner loop is entirely unrolled and instructions are scheduled
72  * to minimize pipeline stall
73  */
74  __asm__ volatile(
75  "mtc1 $zero, %[output] \n\t"
76  "lwc1 $f0, 0(%[p_data]) \n\t"
77  "lwc1 $f1, 0(%[fir_coef]) \n\t"
78  "lwc1 $f2, 4(%[p_data]) \n\t"
79  "madd.s %[output], %[output], $f0, $f1 \n\t"
80  "lwc1 $f3, 4(%[fir_coef]) \n\t"
81  "lwc1 $f4, 8(%[p_data]) \n\t"
82  "madd.s %[output], %[output], $f2, $f3 \n\t"
83  "lwc1 $f5, 8(%[fir_coef]) \n\t"
84 
85  "lwc1 $f0, 12(%[p_data]) \n\t"
86  "lwc1 $f1, 12(%[fir_coef]) \n\t"
87  "madd.s %[output], %[output], $f4, $f5 \n\t"
88  "lwc1 $f2, 16(%[p_data]) \n\t"
89  "madd.s %[output], %[output], $f0, $f1 \n\t"
90  "lwc1 $f3, 16(%[fir_coef]) \n\t"
91  "lwc1 $f4, 20(%[p_data]) \n\t"
92  "lwc1 $f5, 20(%[fir_coef]) \n\t"
93  "madd.s %[output], %[output], $f2, $f3 \n\t"
94 
95  "lwc1 $f0, 24(%[p_data]) \n\t"
96  "lwc1 $f1, 24(%[fir_coef]) \n\t"
97  "lwc1 $f2, 28(%[p_data]) \n\t"
98  "madd.s %[output], %[output], $f4, $f5 \n\t"
99  "lwc1 $f3, 28(%[fir_coef]) \n\t"
100  "madd.s %[output], %[output], $f0, $f1 \n\t"
101  "lwc1 $f4, 32(%[p_data]) \n\t"
102  "madd.s %[output], %[output], $f2, $f3 \n\t"
103  "lwc1 $f5, 32(%[fir_coef]) \n\t"
104  "madd.s %[output], %[output], $f4, $f5 \n\t"
105 
106  "lwc1 $f0, 36(%[p_data]) \n\t"
107  "lwc1 $f1, 36(%[fir_coef]) \n\t"
108  "lwc1 $f2, 40(%[p_data]) \n\t"
109  "lwc1 $f3, 40(%[fir_coef]) \n\t"
110  "madd.s %[output], %[output], $f0, $f1 \n\t"
111  "lwc1 $f4, 44(%[p_data]) \n\t"
112  "lwc1 $f5, 44(%[fir_coef]) \n\t"
113  "madd.s %[output], %[output], $f2, $f3 \n\t"
114 
115  "lwc1 $f0, 48(%[p_data]) \n\t"
116  "lwc1 $f1, 48(%[fir_coef]) \n\t"
117  "lwc1 $f2, 52(%[p_data]) \n\t"
118  "madd.s %[output], %[output], $f4, $f5 \n\t"
119  "lwc1 $f3, 52(%[fir_coef]) \n\t"
120  "lwc1 $f4, 56(%[p_data]) \n\t"
121  "madd.s %[output], %[output], $f0, $f1 \n\t"
122  "lwc1 $f5, 56(%[fir_coef]) \n\t"
123  "madd.s %[output], %[output], $f2, $f3 \n\t"
124 
125  "lwc1 $f0, 60(%[p_data]) \n\t"
126  "lwc1 $f1, 60(%[fir_coef]) \n\t"
127  "lwc1 $f2, 64(%[p_data]) \n\t"
128  "madd.s %[output], %[output], $f4, $f5 \n\t"
129  "lwc1 $f3, 64(%[fir_coef]) \n\t"
130  "madd.s %[output], %[output], $f0, $f1 \n\t"
131  "lwc1 $f4, 68(%[p_data]) \n\t"
132  "madd.s %[output], %[output], $f2, $f3 \n\t"
133  "lwc1 $f5, 68(%[fir_coef]) \n\t"
134  "madd.s %[output], %[output], $f4, $f5 \n\t"
135 
136  "lwc1 $f0, 72(%[p_data]) \n\t"
137  "lwc1 $f1, 72(%[fir_coef]) \n\t"
138  "lwc1 $f2, 76(%[p_data]) \n\t"
139  "lwc1 $f3, 76(%[fir_coef]) \n\t"
140  "madd.s %[output], %[output], $f0, $f1 \n\t"
141  "lwc1 $f4, 80(%[p_data]) \n\t"
142  "lwc1 $f5, 80(%[fir_coef]) \n\t"
143  "madd.s %[output], %[output], $f2, $f3 \n\t"
144 
145  "lwc1 $f0, 84(%[p_data]) \n\t"
146  "lwc1 $f1, 84(%[fir_coef]) \n\t"
147  "lwc1 $f2, 88(%[p_data]) \n\t"
148  "madd.s %[output], %[output], $f4, $f5 \n\t"
149  "lwc1 $f3, 88(%[fir_coef]) \n\t"
150  "lwc1 $f4, 92(%[p_data]) \n\t"
151  "madd.s %[output], %[output], $f0, $f1 \n\t"
152  "lwc1 $f5, 92(%[fir_coef]) \n\t"
153  "madd.s %[output], %[output], $f2, $f3 \n\t"
154 
155  "lwc1 $f0, 96(%[p_data]) \n\t"
156  "lwc1 $f1, 96(%[fir_coef]) \n\t"
157  "lwc1 $f2, 100(%[p_data]) \n\t"
158  "madd.s %[output], %[output], $f4, $f5 \n\t"
159  "lwc1 $f3, 100(%[fir_coef]) \n\t"
160  "lwc1 $f4, 104(%[p_data]) \n\t"
161  "madd.s %[output], %[output], $f0, $f1 \n\t"
162  "lwc1 $f5, 104(%[fir_coef]) \n\t"
163  "madd.s %[output], %[output], $f2, $f3 \n\t"
164 
165  "lwc1 $f0, 108(%[p_data]) \n\t"
166  "lwc1 $f1, 108(%[fir_coef]) \n\t"
167  "madd.s %[output], %[output], $f4, $f5 \n\t"
168  "lwc1 $f2, 112(%[p_data]) \n\t"
169  "lwc1 $f3, 112(%[fir_coef]) \n\t"
170  "madd.s %[output], %[output], $f0, $f1 \n\t"
171  "lwc1 $f4, 116(%[p_data]) \n\t"
172  "lwc1 $f5, 116(%[fir_coef]) \n\t"
173  "lwc1 $f0, 120(%[p_data]) \n\t"
174  "madd.s %[output], %[output], $f2, $f3 \n\t"
175  "lwc1 $f1, 120(%[fir_coef]) \n\t"
176  "madd.s %[output], %[output], $f4, $f5 \n\t"
177  "madd.s %[output], %[output], $f0, $f1 \n\t"
178 
179  : [output]"=&f"(output)
180  : [fir_coef]"r"(fir_coef), [p_data]"r"(p_data)
181  : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "memory"
182  );
183  out[i] = output;
184  }
185  memcpy(mem, data + AMRWB_SFR_SIZE_16k, HB_FIR_SIZE * sizeof(float));
186 }
187 #endif /* HAVE_INLINE_ASM */
in
About Git write you should know how to use GIT properly Luckily Git comes with excellent documentation git help man git shows you the available git< command > help man git< command > shows information about the subcommand< command > The most comprehensive manual is the website Git Reference visit they are quite exhaustive You do not need a special username or password All you need is to provide a ssh public key to the Git server admin What follows now is a basic introduction to Git and some FFmpeg specific guidelines Read it at least if you are granted commit privileges to the FFmpeg project you are expected to be familiar with these rules I if not You can get git from etc no matter how small Every one of them has been saved from looking like a fool by this many times It s very easy for stray debug output or cosmetic modifications to slip in
Definition: git-howto.txt:5
avutil.h
external API header
amrwbdec_mips.h
Reference: libavcodec/amrwbdec.c.
mem
int mem
Definition: avisynth_c.h:721
data
Spectrum Plot time data
Definition: FFT of a Simple Sinusoid.m:14
i
synthesis window for stochastic i
Definition: code Kat/hpsmodel.m:34
AMRWB_SFR_SIZE_16k
#define AMRWB_SFR_SIZE_16k
samples per subframe at 16 kHz
Definition: amrwbdata.h:46
HB_FIR_SIZE
#define HB_FIR_SIZE
amount of past data needed by HB filters
Definition: amrwbdata.h:35
output
these buffered frames must be flushed immediately if a new input produces new output(Example:frame rate-doubling filter:filter_frame must(1) flush the second copy of the previous frame, if it is still there,(2) push the first copy of the incoming frame,(3) keep the second copy for later.) If the input frame is not enough to produce output
amrwbdata.h
AMR wideband data and definitions.
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