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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* file_sink.cpp - File Sink
*/
#include <fcntl.h>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <libcamera/camera.h>
#include "file_sink.h"
using namespace libcamera;
FileSink::FileSink(const std::string &pattern)
: pattern_(pattern)
{
}
FileSink::~FileSink()
{
for (auto &iter : mappedBuffers_) {
void *memory = iter.second.first;
unsigned int length = iter.second.second;
munmap(memory, length);
}
mappedBuffers_.clear();
}
int FileSink::configure(const libcamera::CameraConfiguration &config)
{
int ret = FrameSink::configure(config);
if (ret < 0)
return ret;
streamNames_.clear();
for (unsigned int index = 0; index < config.size(); ++index) {
const StreamConfiguration &cfg = config.at(index);
streamNames_[cfg.stream()] = "stream" + std::to_string(index);
}
return 0;
}
void FileSink::mapBuffer(FrameBuffer *buffer)
{
/* \todo use MappedFrameBuffer. */
for (const FrameBuffer::Plane &plane : buffer->planes()) {
const int fd = plane.fd.fd();
if (mappedBuffers_.find(fd) == mappedBuffers_.end()) {
/**
* \todo Should we try to only map the portions of the
* dmabuf that are used by planes ?
*/
size_t length = lseek(fd, 0, SEEK_END);
void *memory = mmap(NULL, plane.length, PROT_READ,
MAP_SHARED, fd, 0);
mappedBuffers_[fd] = std::make_pair(memory, length);
}
void *memory = mappedBuffers_[fd].first;
planeData_[&plane] = static_cast<uint8_t *>(memory) + plane.offset;
}
}
bool FileSink::processRequest(Request *request)
{
for (auto [stream, buffer] : request->buffers())
writeBuffer(stream, buffer);
return true;
}
void FileSink::writeBuffer(const Stream *stream, FrameBuffer *buffer)
{
std::string filename;
size_t pos;
int fd, ret = 0;
if (!pattern_.empty())
filename = pattern_;
if (filename.empty() || filename.back() == '/')
filename += "frame-#.bin";
pos = filename.find_first_of('#');
if (pos != std::string::npos) {
std::stringstream ss;
ss << streamNames_[stream] << "-" << std::setw(6)
<< std::setfill('0') << buffer->metadata().sequence;
filename.replace(pos, 1, ss.str());
}
fd = open(filename.c_str(), O_CREAT | O_WRONLY |
(pos == std::string::npos ? O_APPEND : O_TRUNC),
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (fd == -1) {
ret = -errno;
std::cerr << "failed to open file " << filename << ": "
<< strerror(-ret) << std::endl;
return;
}
for (unsigned int i = 0; i < buffer->planes().size(); ++i) {
const FrameBuffer::Plane &plane = buffer->planes()[i];
const FrameMetadata::Plane &meta = buffer->metadata().planes()[i];
uint8_t *data = planeData_[&plane];
unsigned int length = std::min(meta.bytesused, plane.length);
if (meta.bytesused > plane.length)
std::cerr << "payload size " << meta.bytesused
<< " larger than plane size " << plane.length
<< std::endl;
ret = ::write(fd, data, length);
if (ret < 0) {
ret = -errno;
std::cerr << "write error: " << strerror(-ret)
<< std::endl;
break;
} else if (ret != (int)length) {
std::cerr << "write error: only " << ret
<< " bytes written instead of "
<< length << std::endl;
break;
}
}
close(fd);
}
|
