grenderocv.cpp
6.98 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
#include <opencv2/imgproc.hpp>
#include "api/render_ocv.hpp"
#include <opencv2/gapi/cpu/gcpukernel.hpp>
#include <opencv2/gapi/fluid/core.hpp>
struct RenderOCVState
{
std::shared_ptr<cv::gapi::wip::draw::FTTextRender> ftpr;
};
GAPI_OCV_KERNEL_ST(RenderBGROCVImpl, cv::gapi::wip::draw::GRenderBGR, RenderOCVState)
{
static void run(const cv::Mat& in,
const cv::gapi::wip::draw::Prims& prims,
cv::Mat& out,
RenderOCVState& state)
{
// NB: If in and out cv::Mats are the same object
// we can avoid copy and render on out cv::Mat
// It's work if this kernel is last operation in the graph
if (in.data != out.data) {
in.copyTo(out);
}
cv::gapi::wip::draw::drawPrimitivesOCVBGR(out, prims, state.ftpr);
}
static void setup(const cv::GMatDesc& /* in */,
const cv::GArrayDesc& /* prims */,
std::shared_ptr<RenderOCVState>& state,
const cv::GCompileArgs& args)
{
using namespace cv::gapi::wip::draw;
auto opt_freetype_font = cv::gapi::getCompileArg<freetype_font>(args);
state = std::make_shared<RenderOCVState>();
if (opt_freetype_font.has_value())
{
state->ftpr = std::make_shared<FTTextRender>(opt_freetype_font->path);
}
}
};
GAPI_OCV_KERNEL_ST(RenderNV12OCVImpl, cv::gapi::wip::draw::GRenderNV12, RenderOCVState)
{
static void run(const cv::Mat& in_y,
const cv::Mat& in_uv,
const cv::gapi::wip::draw::Prims& prims,
cv::Mat& out_y,
cv::Mat& out_uv,
RenderOCVState& state)
{
// NB: If in and out cv::Mats are the same object
// we can avoid copy and render on out cv::Mat
// It's work if this kernel is last operation in the graph
if (in_y.data != out_y.data) {
in_y.copyTo(out_y);
}
if (in_uv.data != out_uv.data) {
in_uv.copyTo(out_uv);
}
/* FIXME How to render correctly on NV12 format ?
*
* Rendering on NV12 via OpenCV looks like this:
*
* y --------> 1)(NV12 -> YUV) -> yuv -> 2)draw -> yuv -> 3)split -------> out_y
* ^ |
* | |
* uv -------------- `----------> out_uv
*
*
* 1) Collect yuv mat from two planes, uv plain in two times less than y plane
* so, upsample uv in tow times, with bilinear interpolation
*
* 2) Render primitives on YUV
*
* 3) Convert yuv to NV12 (using bilinear interpolation)
*
*/
// NV12 -> YUV
cv::Mat upsample_uv, yuv;
cv::resize(in_uv, upsample_uv, in_uv.size() * 2, cv::INTER_LINEAR);
cv::merge(std::vector<cv::Mat>{in_y, upsample_uv}, yuv);
cv::gapi::wip::draw::drawPrimitivesOCVYUV(yuv, prims, state.ftpr);
// YUV -> NV12
cv::Mat out_u, out_v, uv_plane;
std::vector<cv::Mat> chs = {out_y, out_u, out_v};
cv::split(yuv, chs);
cv::merge(std::vector<cv::Mat>{chs[1], chs[2]}, uv_plane);
cv::resize(uv_plane, out_uv, uv_plane.size() / 2, cv::INTER_LINEAR);
}
static void setup(const cv::GMatDesc& /* in_y */,
const cv::GMatDesc& /* in_uv */,
const cv::GArrayDesc& /* prims */,
std::shared_ptr<RenderOCVState>& state,
const cv::GCompileArgs& args)
{
using namespace cv::gapi::wip::draw;
auto has_freetype_font = cv::gapi::getCompileArg<freetype_font>(args);
state = std::make_shared<RenderOCVState>();
if (has_freetype_font)
{
state->ftpr = std::make_shared<FTTextRender>(has_freetype_font->path);
}
}
};
GAPI_OCV_KERNEL_ST(RenderFrameOCVImpl, cv::gapi::wip::draw::GRenderFrame, RenderOCVState)
{
static void run(const cv::MediaFrame & in,
const cv::gapi::wip::draw::Prims & prims,
cv::MediaFrame & out,
RenderOCVState & state)
{
GAPI_Assert(in.desc().fmt == cv::MediaFormat::NV12);
// FIXME: consider a better approach (aka native inplace operation)
// Non-intuitive logic with shared_ptr Priv class
out = in;
auto desc = out.desc();
auto w_out = out.access(cv::MediaFrame::Access::W);
auto out_y = cv::Mat(desc.size, CV_8UC1, w_out.ptr[0], w_out.stride[0]);
auto out_uv = cv::Mat(desc.size / 2, CV_8UC2, w_out.ptr[1], w_out.stride[1]);
auto r_in = in.access(cv::MediaFrame::Access::R);
auto in_y = cv::Mat(desc.size, CV_8UC1, r_in.ptr[0], r_in.stride[0]);
auto in_uv = cv::Mat(desc.size / 2, CV_8UC2, r_in.ptr[1], r_in.stride[1]);
/* FIXME How to render correctly on NV12 format ?
*
* Rendering on NV12 via OpenCV looks like this:
*
* y --------> 1)(NV12 -> YUV) -> yuv -> 2)draw -> yuv -> 3)split -------> out_y
* ^ |
* | |
* uv -------------- `----------> out_uv
*
*
* 1) Collect yuv mat from two planes, uv plain in two times less than y plane
* so, upsample uv in two times, with bilinear interpolation
*
* 2) Render primitives on YUV
*
* 3) Convert yuv to NV12 (using bilinear interpolation)
*
*/
// NV12 -> YUV
cv::Mat upsample_uv, yuv;
cv::resize(in_uv, upsample_uv, in_uv.size() * 2, cv::INTER_LINEAR);
cv::merge(std::vector<cv::Mat>{in_y, upsample_uv}, yuv);
cv::gapi::wip::draw::drawPrimitivesOCVYUV(yuv, prims, state.ftpr);
// YUV -> NV12
cv::Mat out_u, out_v, uv_plane;
std::vector<cv::Mat> chs = { out_y, out_u, out_v };
cv::split(yuv, chs);
cv::merge(std::vector<cv::Mat>{chs[1], chs[2]}, uv_plane);
cv::resize(uv_plane, out_uv, uv_plane.size() / 2, cv::INTER_LINEAR);
}
static void setup(const cv::GFrameDesc& /* in_nv12 */,
const cv::GArrayDesc& /* prims */,
std::shared_ptr<RenderOCVState>&state,
const cv::GCompileArgs & args)
{
using namespace cv::gapi::wip::draw;
auto has_freetype_font = cv::gapi::getCompileArg<freetype_font>(args);
state = std::make_shared<RenderOCVState>();
if (has_freetype_font)
{
state->ftpr = std::make_shared<FTTextRender>(has_freetype_font->path);
}
}
};
cv::gapi::GKernelPackage cv::gapi::render::ocv::kernels()
{
const static auto pkg = cv::gapi::kernels<RenderBGROCVImpl, RenderNV12OCVImpl, RenderFrameOCVImpl>();
return pkg;
}