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iirfilter_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: Bojan Zivkovic (bojan@mips.com)
30  *
31  * IIR filter optimized for MIPS floating-point architecture
32  *
33  * This file is part of FFmpeg.
34  *
35  * FFmpeg is free software; you can redistribute it and/or
36  * modify it under the terms of the GNU Lesser General Public
37  * License as published by the Free Software Foundation; either
38  * version 2.1 of the License, or (at your option) any later version.
39  *
40  * FFmpeg is distributed in the hope that it will be useful,
41  * but WITHOUT ANY WARRANTY; without even the implied warranty of
42  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
43  * Lesser General Public License for more details.
44  *
45  * You should have received a copy of the GNU Lesser General Public
46  * License along with FFmpeg; if not, write to the Free Software
47  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48  */
49 
50  /**
51  * @file
52  * Reference: libavcodec/iirfilter.c
53  */
54 
55 #include "config.h"
56 #include "libavcodec/iirfilter.h"
57 
58 #if HAVE_INLINE_ASM
59 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
60 typedef struct FFIIRFilterCoeffs {
61  int order;
62  float gain;
63  int *cx;
64  float *cy;
66 
67 typedef struct FFIIRFilterState {
68  float x[1];
70 
71 static void iir_filter_flt_mips(const struct FFIIRFilterCoeffs *c,
72  struct FFIIRFilterState *s, int size,
73  const float *src, ptrdiff_t sstep, float *dst, ptrdiff_t dstep)
74 {
75  if (c->order == 2) {
76  int i;
77  const float *src0 = src;
78  float *dst0 = dst;
79  for (i = 0; i < size; i++) {
80  float in = *src0 * c->gain + s->x[0] * c->cy[0] + s->x[1] * c->cy[1];
81  *dst0 = s->x[0] + in + s->x[1] * c->cx[1];
82  s->x[0] = s->x[1];
83  s->x[1] = in;
84  src0 += sstep;
85  dst0 += dstep;
86  }
87  } else if (c->order == 4) {
88  int i;
89  const float *src0 = src;
90  float *dst0 = dst;
91  float four = 4.0;
92  float six = 6.0;
93  for (i = 0; i < size; i += 4) {
94  float in1, in2, in3, in4;
95  float res1, res2, res3, res4;
96  float *x = s->x;
97  float *cy = c->cy;
98  float gain = c->gain;
99  float src0_0 = src0[0 ];
100  float src0_1 = src0[sstep ];
101  float src0_2 = src0[2*sstep];
102  float src0_3 = src0[3*sstep];
103 
104  __asm__ volatile (
105  "lwc1 $f0, 0(%[cy]) \n\t"
106  "lwc1 $f4, 0(%[x]) \n\t"
107  "lwc1 $f5, 4(%[x]) \n\t"
108  "lwc1 $f6, 8(%[x]) \n\t"
109  "lwc1 $f7, 12(%[x]) \n\t"
110  "mul.s %[in1], %[src0_0], %[gain] \n\t"
111  "mul.s %[in2], %[src0_1], %[gain] \n\t"
112  "mul.s %[in3], %[src0_2], %[gain] \n\t"
113  "mul.s %[in4], %[src0_3], %[gain] \n\t"
114  "lwc1 $f1, 4(%[cy]) \n\t"
115  "madd.s %[in1], %[in1], $f0, $f4 \n\t"
116  "madd.s %[in2], %[in2], $f0, $f5 \n\t"
117  "madd.s %[in3], %[in3], $f0, $f6 \n\t"
118  "madd.s %[in4], %[in4], $f0, $f7 \n\t"
119  "lwc1 $f2, 8(%[cy]) \n\t"
120  "madd.s %[in1], %[in1], $f1, $f5 \n\t"
121  "madd.s %[in2], %[in2], $f1, $f6 \n\t"
122  "madd.s %[in3], %[in3], $f1, $f7 \n\t"
123  "lwc1 $f3, 12(%[cy]) \n\t"
124  "add.s $f8, $f5, $f7 \n\t"
125  "madd.s %[in1], %[in1], $f2, $f6 \n\t"
126  "madd.s %[in2], %[in2], $f2, $f7 \n\t"
127  "mul.s $f9, $f6, %[six] \n\t"
128  "mul.s $f10, $f7, %[six] \n\t"
129  "madd.s %[in1], %[in1], $f3, $f7 \n\t"
130  "madd.s %[in2], %[in2], $f3, %[in1] \n\t"
131  "madd.s %[in3], %[in3], $f2, %[in1] \n\t"
132  "madd.s %[in4], %[in4], $f1, %[in1] \n\t"
133  "add.s %[res1], $f4, %[in1] \n\t"
134  "swc1 %[in1], 0(%[x]) \n\t"
135  "add.s $f0, $f6, %[in1] \n\t"
136  "madd.s %[in3], %[in3], $f3, %[in2] \n\t"
137  "madd.s %[in4], %[in4], $f2, %[in2] \n\t"
138  "add.s %[res2], $f5, %[in2] \n\t"
139  "madd.s %[res1], %[res1], $f8, %[four] \n\t"
140  "add.s $f8, $f7, %[in2] \n\t"
141  "swc1 %[in2], 4(%[x]) \n\t"
142  "madd.s %[in4], %[in4], $f3, %[in3] \n\t"
143  "add.s %[res3], $f6, %[in3] \n\t"
144  "add.s %[res1], %[res1], $f9 \n\t"
145  "madd.s %[res2], %[res2], $f0, %[four] \n\t"
146  "swc1 %[in3], 8(%[x]) \n\t"
147  "add.s %[res4], $f7, %[in4] \n\t"
148  "madd.s %[res3], %[res3], $f8, %[four] \n\t"
149  "swc1 %[in4], 12(%[x]) \n\t"
150  "add.s %[res2], %[res2], $f10 \n\t"
151  "add.s $f8, %[in1], %[in3] \n\t"
152  "madd.s %[res3], %[res3], %[in1], %[six] \n\t"
153  "madd.s %[res4], %[res4], $f8, %[four] \n\t"
154  "madd.s %[res4], %[res4], %[in2], %[six] \n\t"
155 
156  : [in1]"=&f"(in1), [in2]"=&f"(in2),
157  [in3]"=&f"(in3), [in4]"=&f"(in4),
158  [res1]"=&f"(res1), [res2]"=&f"(res2),
159  [res3]"=&f"(res3), [res4]"=&f"(res4)
160  : [src0_0]"f"(src0_0), [src0_1]"f"(src0_1),
161  [src0_2]"f"(src0_2), [src0_3]"f"(src0_3),
162  [gain]"f"(gain), [x]"r"(x), [cy]"r"(cy),
163  [four]"f"(four), [six]"f"(six)
164  : "$f0", "$f1", "$f2", "$f3",
165  "$f4", "$f5", "$f6", "$f7",
166  "$f8", "$f9", "$f10",
167  "memory"
168  );
169 
170  dst0[0 ] = res1;
171  dst0[sstep ] = res2;
172  dst0[2*sstep] = res3;
173  dst0[3*sstep] = res4;
174 
175  src0 += 4*sstep;
176  dst0 += 4*dstep;
177  }
178  } else {
179  int i;
180  const float *src0 = src;
181  float *dst0 = dst;
182  for (i = 0; i < size; i++) {
183  int j;
184  float in, res;
185  in = *src0 * c->gain;
186  for(j = 0; j < c->order; j++)
187  in += c->cy[j] * s->x[j];
188  res = s->x[0] + in + s->x[c->order >> 1] * c->cx[c->order >> 1];
189  for(j = 1; j < c->order >> 1; j++)
190  res += (s->x[j] + s->x[c->order - j]) * c->cx[j];
191  for(j = 0; j < c->order - 1; j++)
192  s->x[j] = s->x[j + 1];
193  *dst0 = res;
194  s->x[c->order - 1] = in;
195  src0 += sstep;
196  dst0 += dstep;
197  }
198  }
199 }
200 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
201 #endif /* HAVE_INLINE_ASM */
202 
204 #if HAVE_INLINE_ASM
205 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
206  f->filter_flt = iir_filter_flt_mips;
207 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
208 #endif /* HAVE_INLINE_ASM */
209 }
#define src
Definition: vp8dsp.c:254
#define f(width, name)
Definition: cbs_vp9.c:255
ptrdiff_t size
Definition: opengl_enc.c:101
IIR filter state.
Definition: iirfilter.c:47
void ff_iir_filter_init_mips(FFIIRFilterContext *f)
void(* filter_flt)(const struct FFIIRFilterCoeffs *coeffs, struct FFIIRFilterState *state, int size, const float *src, ptrdiff_t sstep, float *dst, ptrdiff_t dstep)
Perform IIR filtering on floating-point input samples.
Definition: iirfilter.h:63
#define s(width, name)
Definition: cbs_vp9.c:257
float x[1]
Definition: iirfilter.c:48
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
#define src0
Definition: h264pred.c:138
IIR filter global parameters.
Definition: iirfilter.c:37
static double c[64]
IIR filter interface.