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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Laurent Pinchart
*
* converter.cpp - Format converter for simple pipeline handler
*/
#include "converter.h"
#include <algorithm>
#include <libcamera/buffer.h>
#include <libcamera/geometry.h>
#include <libcamera/signal.h>
#include "log.h"
#include "media_device.h"
#include "v4l2_videodevice.h"
namespace libcamera {
LOG_DECLARE_CATEGORY(SimplePipeline);
SimpleConverter::SimpleConverter(MediaDevice *media)
: m2m_(nullptr)
{
/*
* Locate the video node. There's no need to validate the pipeline
* further, the caller guarantees that this is a V4L2 mem2mem device.
*/
const std::vector<MediaEntity *> &entities = media->entities();
auto it = std::find_if(entities.begin(), entities.end(),
[](MediaEntity *entity) {
return entity->function() == MEDIA_ENT_F_IO_V4L;
});
if (it == entities.end())
return;
m2m_ = new V4L2M2MDevice((*it)->deviceNode());
m2m_->output()->bufferReady.connect(this, &SimpleConverter::outputBufferReady);
m2m_->capture()->bufferReady.connect(this, &SimpleConverter::captureBufferReady);
}
SimpleConverter::~SimpleConverter()
{
delete m2m_;
}
int SimpleConverter::open()
{
if (!m2m_)
return -ENODEV;
return m2m_->open();
}
void SimpleConverter::close()
{
if (m2m_)
m2m_->close();
}
std::vector<PixelFormat> SimpleConverter::formats(PixelFormat input)
{
if (!m2m_)
return {};
/*
* Set the format on the input side (V4L2 output) of the converter to
* enumerate the conversion capabilities on its output (V4L2 capture).
*/
V4L2DeviceFormat format;
format.fourcc = m2m_->output()->toV4L2PixelFormat(input);
format.size = { 1, 1 };
int ret = m2m_->output()->setFormat(&format);
if (ret < 0) {
LOG(SimplePipeline, Error)
<< "Failed to set format: " << strerror(-ret);
return {};
}
std::vector<PixelFormat> pixelFormats;
for (const auto &format : m2m_->capture()->formats()) {
PixelFormat pixelFormat = format.first.toPixelFormat();
if (pixelFormat)
pixelFormats.push_back(pixelFormat);
}
return pixelFormats;
}
int SimpleConverter::configure(PixelFormat inputFormat,
PixelFormat outputFormat, const Size &size)
{
V4L2DeviceFormat format;
int ret;
V4L2PixelFormat videoFormat = m2m_->output()->toV4L2PixelFormat(inputFormat);
format.fourcc = videoFormat;
format.size = size;
ret = m2m_->output()->setFormat(&format);
if (ret < 0) {
LOG(SimplePipeline, Error)
<< "Failed to set input format: " << strerror(-ret);
return ret;
}
if (format.fourcc != videoFormat || format.size != size) {
LOG(SimplePipeline, Error)
<< "Input format not supported";
return -EINVAL;
}
/*
* Set the pixel format on the output, the size is identical to the
* input as we don't support scaling.
*/
videoFormat = m2m_->capture()->toV4L2PixelFormat(outputFormat);
format.fourcc = videoFormat;
ret = m2m_->capture()->setFormat(&format);
if (ret < 0) {
LOG(SimplePipeline, Error)
<< "Failed to set output format: " << strerror(-ret);
return ret;
}
if (format.fourcc != videoFormat || format.size != size) {
LOG(SimplePipeline, Error)
<< "Output format not supported";
return -EINVAL;
}
return 0;
}
int SimpleConverter::exportBuffers(unsigned int count,
std::vector<std::unique_ptr<FrameBuffer>> *buffers)
{
return m2m_->capture()->exportBuffers(count, buffers);
}
int SimpleConverter::start(unsigned int count)
{
int ret = m2m_->output()->importBuffers(count);
if (ret < 0)
return ret;
ret = m2m_->capture()->importBuffers(count);
if (ret < 0) {
stop();
return ret;
}
ret = m2m_->output()->streamOn();
if (ret < 0) {
stop();
return ret;
}
ret = m2m_->capture()->streamOn();
if (ret < 0) {
stop();
return ret;
}
return 0;
}
void SimpleConverter::stop()
{
m2m_->capture()->streamOff();
m2m_->output()->streamOff();
m2m_->capture()->releaseBuffers();
m2m_->output()->releaseBuffers();
}
int SimpleConverter::queueBuffers(FrameBuffer *input, FrameBuffer *output)
{
int ret = m2m_->output()->queueBuffer(input);
if (ret < 0)
return ret;
ret = m2m_->capture()->queueBuffer(output);
if (ret < 0)
return ret;
return 0;
}
void SimpleConverter::captureBufferReady(FrameBuffer *buffer)
{
if (!outputDoneQueue_.empty()) {
FrameBuffer *other = outputDoneQueue_.front();
outputDoneQueue_.pop();
bufferReady.emit(other, buffer);
} else {
captureDoneQueue_.push(buffer);
}
}
void SimpleConverter::outputBufferReady(FrameBuffer *buffer)
{
if (!captureDoneQueue_.empty()) {
FrameBuffer *other = captureDoneQueue_.front();
captureDoneQueue_.pop();
bufferReady.emit(buffer, other);
} else {
outputDoneQueue_.push(buffer);
}
}
} /* namespace libcamera */
|
