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swscale_unscaled.c
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1 /*
2  * Copyright (C) 2013 Xiaolei Yu <dreifachstein@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 "libswscale/swscale.h"
24 #include "libavutil/arm/cpu.h"
25 
26 extern void rgbx_to_nv12_neon_32(const uint8_t *src, uint8_t *y, uint8_t *chroma,
27  int width, int height,
28  int y_stride, int c_stride, int src_stride,
29  int32_t coeff_tbl[9]);
30 
31 extern void rgbx_to_nv12_neon_16(const uint8_t *src, uint8_t *y, uint8_t *chroma,
32  int width, int height,
33  int y_stride, int c_stride, int src_stride,
34  int32_t coeff_tbl[9]);
35 
36 static int rgbx_to_nv12_neon_32_wrapper(SwsContext *context, const uint8_t *src[],
37  int srcStride[], int srcSliceY, int srcSliceH,
38  uint8_t *dst[], int dstStride[]) {
39 
40  rgbx_to_nv12_neon_32(src[0] + srcSliceY * srcStride[0],
41  dst[0] + srcSliceY * dstStride[0],
42  dst[1] + (srcSliceY / 2) * dstStride[1],
43  context->srcW, srcSliceH,
44  dstStride[0], dstStride[1], srcStride[0],
45  context->input_rgb2yuv_table);
46 
47  return 0;
48 }
49 
50 static int rgbx_to_nv12_neon_16_wrapper(SwsContext *context, const uint8_t *src[],
51  int srcStride[], int srcSliceY, int srcSliceH,
52  uint8_t *dst[], int dstStride[]) {
53 
54  rgbx_to_nv12_neon_16(src[0] + srcSliceY * srcStride[0],
55  dst[0] + srcSliceY * dstStride[0],
56  dst[1] + (srcSliceY / 2) * dstStride[1],
57  context->srcW, srcSliceH,
58  dstStride[0], dstStride[1], srcStride[0],
59  context->input_rgb2yuv_table);
60 
61  return 0;
62 }
63 
65  int accurate_rnd = c->flags & SWS_ACCURATE_RND;
66  if (c->srcFormat == AV_PIX_FMT_RGBA
67  && c->dstFormat == AV_PIX_FMT_NV12
68  && (c->srcW >= 16)) {
69  c->swscale = accurate_rnd ? rgbx_to_nv12_neon_32_wrapper
71  }
72 }
73 
75 {
76  int cpu_flags = av_get_cpu_flags();
77  if (have_neon(cpu_flags))
79 }