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dither_init.c
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1 /*
2  * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavresample/dither.h"
25 
26 void ff_quantize_sse2(int16_t *dst, const float *src, float *dither, int len);
27 
28 void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
29 void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
30 
31 void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
32 void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
33 
35  enum AVResampleDitherMethod method)
36 {
38 
39  if (EXTERNAL_SSE2(cpu_flags)) {
40  ddsp->quantize = ff_quantize_sse2;
41  ddsp->ptr_align = 16;
42  ddsp->samples_align = 8;
43  }
44 
45  if (method == AV_RESAMPLE_DITHER_RECTANGULAR) {
46  if (EXTERNAL_SSE2(cpu_flags)) {
48  }
49  if (EXTERNAL_AVX_FAST(cpu_flags)) {
51  }
52  } else {
53  if (EXTERNAL_SSE2(cpu_flags)) {
55  }
56  if (EXTERNAL_AVX_FAST(cpu_flags)) {
58  }
59  }
60 }
void ff_quantize_sse2(int16_t *dst, const float *src, float *dither, int len)
void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len)
av_cold void ff_dither_init_x86(DitherDSPContext *ddsp, enum AVResampleDitherMethod method)
Definition: dither_init.c:34
#define src
Definition: vp8dsp.c:254
Rectangular Dither.
Definition: avresample.h:125
#define av_cold
Definition: attributes.h:82
#define EXTERNAL_AVX_FAST(flags)
Definition: cpu.h:67
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:57
int ptr_align
src and dst constraints for quantize()
Definition: dither.h:40
static const uint8_t dither[8][8]
Definition: vf_fspp.c:57
void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len)
int samples_align
len constraints for quantize()
Definition: dither.h:41
static int cpu_flags
Definition: cpu.c:47
void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len)
#define src0
Definition: h264pred.c:138
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:88
int len
void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len)
void(* dither_int_to_float)(float *dst, int *src0, int len)
Convert dither noise from int to float with triangular distribution.
Definition: dither.h:54
AVResampleDitherMethod
Definition: avresample.h:123
void(* quantize)(int16_t *dst, const float *src, float *dither, int len)
Convert samples from flt to s16 with added dither noise.
Definition: dither.h:38