FFmpeg
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
dither_init.c
Go to the documentation of this file.
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 extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
27  int len);
28 
29 extern void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
30 extern void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
31 
32 extern void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
33 extern void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
34 
36  enum AVResampleDitherMethod method)
37 {
38  int mm_flags = av_get_cpu_flags();
39 
40  if (EXTERNAL_SSE2(mm_flags)) {
41  ddsp->quantize = ff_quantize_sse2;
42  ddsp->ptr_align = 16;
43  ddsp->samples_align = 8;
44  }
45 
46  if (method == AV_RESAMPLE_DITHER_RECTANGULAR) {
47  if (EXTERNAL_SSE2(mm_flags)) {
49  }
50  if (EXTERNAL_AVX(mm_flags)) {
52  }
53  } else {
54  if (EXTERNAL_SSE2(mm_flags)) {
56  }
57  if (EXTERNAL_AVX(mm_flags)) {
59  }
60  }
61 }