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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* file_sink.cpp - File Sink
*/
#include <assert.h>
#include <fcntl.h>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string.h>
#include <unistd.h>
#include <libcamera/camera.h>
#include "file_sink.h"
#include "image.h"
using namespace libcamera;
FileSink::FileSink(const std::map<const libcamera::Stream *, std::string> &streamNames,
const std::string &pattern)
: streamNames_(streamNames), pattern_(pattern)
{
}
FileSink::~FileSink()
{
}
int FileSink::configure(const libcamera::CameraConfiguration &config)
{
int ret = FrameSink::configure(config);
if (ret < 0)
return ret;
return 0;
}
void FileSink::mapBuffer(FrameBuffer *buffer)
{
std::unique_ptr<Image> image =
Image::fromFrameBuffer(buffer, Image::MapMode::ReadOnly);
assert(image != nullptr);
mappedBuffers_[buffer] = std::move(image);
}
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;
}
Image *image = mappedBuffers_[buffer].get();
for (unsigned int i = 0; i < buffer->planes().size(); ++i) {
const FrameMetadata::Plane &meta = buffer->metadata().planes()[i];
Span<uint8_t> data = image->data(i);
unsigned int length = std::min<unsigned int>(meta.bytesused, data.size());
if (meta.bytesused > data.size())
std::cerr << "payload size " << meta.bytesused
<< " larger than plane size " << data.size()
<< std::endl;
ret = ::write(fd, data.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);
}
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