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mdct15_init.c
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1 /*
2  * SIMD optimized non-power-of-two MDCT functions
3  *
4  * Copyright (C) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/mdct15.h"
27 
28 void ff_mdct15_postreindex_sse3(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8);
29 void ff_mdct15_postreindex_avx2(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8);
30 
32 
34 {
35  int k;
36  FFTComplex tmp[30];
37 
38  /* 5-point FFT twiddles */
39  s->exptab[60].re = s->exptab[60].im = s->exptab[19].re;
40  s->exptab[61].re = s->exptab[61].im = s->exptab[19].im;
41  s->exptab[62].re = s->exptab[62].im = s->exptab[20].re;
42  s->exptab[63].re = s->exptab[63].im = s->exptab[20].im;
43 
44  /* 15-point FFT twiddles */
45  for (k = 0; k < 5; k++) {
46  tmp[6*k + 0] = s->exptab[k + 0];
47  tmp[6*k + 2] = s->exptab[k + 5];
48  tmp[6*k + 4] = s->exptab[k + 10];
49 
50  tmp[6*k + 1] = s->exptab[2 * (k + 0)];
51  tmp[6*k + 3] = s->exptab[2 * (k + 5)];
52  tmp[6*k + 5] = s->exptab[2 * k + 5 ];
53  }
54 
55  for (k = 0; k < 6; k++) {
56  FFTComplex ac_exp[] = {
57  { tmp[6*1 + k].re, tmp[6*1 + k].re },
58  { tmp[6*2 + k].re, tmp[6*2 + k].re },
59  { tmp[6*3 + k].re, tmp[6*3 + k].re },
60  { tmp[6*4 + k].re, tmp[6*4 + k].re },
61  { tmp[6*1 + k].im, -tmp[6*1 + k].im },
62  { tmp[6*2 + k].im, -tmp[6*2 + k].im },
63  { tmp[6*3 + k].im, -tmp[6*3 + k].im },
64  { tmp[6*4 + k].im, -tmp[6*4 + k].im },
65  };
66  memcpy(s->exptab + 8*k, ac_exp, 8*sizeof(FFTComplex));
67  }
68 
69  /* Specialcase when k = 0 */
70  for (k = 0; k < 3; k++) {
71  FFTComplex dc_exp[] = {
72  { tmp[2*k + 0].re, -tmp[2*k + 0].im },
73  { tmp[2*k + 0].im, tmp[2*k + 0].re },
74  { tmp[2*k + 1].re, -tmp[2*k + 1].im },
75  { tmp[2*k + 1].im, tmp[2*k + 1].re },
76  };
77  memcpy(s->exptab + 8*6 + 4*k, dc_exp, 4*sizeof(FFTComplex));
78  }
79 }
80 
82 {
83  int adjust_twiddles = 0;
85 
86  if (EXTERNAL_SSE3(cpu_flags))
88 
89  if (ARCH_X86_64 && EXTERNAL_AVX(cpu_flags)) {
90  s->fft15 = ff_fft15_avx;
91  adjust_twiddles = 1;
92  }
93 
94  if (ARCH_X86_64 && EXTERNAL_AVX2_FAST(cpu_flags))
96 
97  if (adjust_twiddles)
98  perm_twiddles(s);
99 }
void(* fft15)(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride)
Definition: mdct15.h:43
av_cold void ff_mdct15_init_x86(MDCT15Context *s)
Definition: mdct15_init.c:81
FFTSample re
Definition: avfft.h:38
static atomic_int cpu_flags
Definition: cpu.c:50
void ff_mdct15_postreindex_sse3(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8)
#define av_cold
Definition: attributes.h:82
void ff_fft15_avx(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride)
#define EXTERNAL_SSE3(flags)
Definition: cpu.h:62
#define EXTERNAL_AVX2_FAST(flags)
Definition: cpu.h:79
int8_t exp
Definition: eval.c:72
void(* postreindex)(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8)
Definition: mdct15.h:46
void ff_mdct15_postreindex_avx2(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8)
static struct @146 * exptab
#define s(width, name)
Definition: cbs_vp9.c:257
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
static void perm_twiddles(MDCT15Context *s)
Definition: mdct15_init.c:33
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
FFTComplex exptab[64]
Definition: mdct15.h:40
FFTSample im
Definition: avfft.h:38
FILE * out
Definition: movenc.c:54
#define EXTERNAL_AVX(flags)
Definition: cpu.h:70
static uint8_t tmp[11]
Definition: aes_ctr.c:26