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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* capture.cpp - Cam capture
*/
#include <chrono>
#include <iomanip>
#include <iostream>
#include <limits.h>
#include <sstream>
#include "capture.h"
#include "main.h"
using namespace libcamera;
Capture::Capture(std::shared_ptr<Camera> camera, CameraConfiguration *config)
: camera_(camera), config_(config), writer_(nullptr)
{
}
int Capture::run(EventLoop *loop, const OptionsParser::Options &options)
{
int ret;
if (!camera_) {
std::cout << "Can't capture without a camera" << std::endl;
return -ENODEV;
}
streamName_.clear();
for (unsigned int index = 0; index < config_->size(); ++index) {
StreamConfiguration &cfg = config_->at(index);
streamName_[cfg.stream()] = "stream" + std::to_string(index);
}
ret = camera_->configure(config_);
if (ret < 0) {
std::cout << "Failed to configure camera" << std::endl;
return ret;
}
camera_->requestCompleted.connect(this, &Capture::requestComplete);
if (options.isSet(OptFile)) {
if (!options[OptFile].toString().empty())
writer_ = new BufferWriter(options[OptFile]);
else
writer_ = new BufferWriter();
}
FrameBufferAllocator *allocator = FrameBufferAllocator::create(camera_);
ret = capture(loop, allocator);
if (options.isSet(OptFile)) {
delete writer_;
writer_ = nullptr;
}
delete allocator;
return ret;
}
int Capture::capture(EventLoop *loop, FrameBufferAllocator *allocator)
{
int ret;
/* Identify the stream with the least number of buffers. */
unsigned int nbuffers = UINT_MAX;
for (StreamConfiguration &cfg : *config_) {
ret = allocator->allocate(cfg.stream());
if (ret < 0) {
std::cerr << "Can't allocate buffers" << std::endl;
return -ENOMEM;
}
unsigned int allocated = allocator->buffers(cfg.stream()).size();
nbuffers = std::min(nbuffers, allocated);
}
/*
* TODO: make cam tool smarter to support still capture by for
* example pushing a button. For now run all streams all the time.
*/
std::vector<Request *> requests;
for (unsigned int i = 0; i < nbuffers; i++) {
Request *request = camera_->createRequest();
if (!request) {
std::cerr << "Can't create request" << std::endl;
return -ENOMEM;
}
for (StreamConfiguration &cfg : *config_) {
Stream *stream = cfg.stream();
const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
allocator->buffers(stream);
const std::unique_ptr<FrameBuffer> &buffer = buffers[i];
ret = request->addBuffer(stream, buffer.get());
if (ret < 0) {
std::cerr << "Can't set buffer for request"
<< std::endl;
return ret;
}
if (writer_)
writer_->mapBuffer(buffer.get());
}
requests.push_back(request);
}
ret = camera_->start();
if (ret) {
std::cout << "Failed to start capture" << std::endl;
return ret;
}
for (Request *request : requests) {
ret = camera_->queueRequest(request);
if (ret < 0) {
std::cerr << "Can't queue request" << std::endl;
camera_->stop();
return ret;
}
}
std::cout << "Capture until user interrupts by SIGINT" << std::endl;
ret = loop->exec();
if (ret)
std::cout << "Failed to run capture loop" << std::endl;
ret = camera_->stop();
if (ret)
std::cout << "Failed to stop capture" << std::endl;
return ret;
}
void Capture::requestComplete(Request *request)
{
if (request->status() == Request::RequestCancelled)
return;
const std::map<Stream *, FrameBuffer *> &buffers = request->buffers();
std::chrono::steady_clock::time_point now = std::chrono::steady_clock::now();
double fps = std::chrono::duration_cast<std::chrono::milliseconds>(now - last_).count();
fps = last_ != std::chrono::steady_clock::time_point() && fps
? 1000.0 / fps : 0.0;
last_ = now;
std::stringstream info;
info << "fps: " << std::fixed << std::setprecision(2) << fps;
for (auto it = buffers.begin(); it != buffers.end(); ++it) {
Stream *stream = it->first;
FrameBuffer *buffer = it->second;
const std::string &name = streamName_[stream];
const FrameMetadata &metadata = buffer->metadata();
info << " " << name
<< " seq: " << std::setw(6) << std::setfill('0') << metadata.sequence
<< " bytesused: ";
unsigned int nplane = 0;
for (const FrameMetadata::Plane &plane : metadata.planes) {
info << plane.bytesused;
if (++nplane < metadata.planes.size())
info << "/";
}
if (writer_)
writer_->write(buffer, name);
}
std::cout << info.str() << std::endl;
/*
* Create a new request and populate it with one buffer for each
* stream.
*/
request = camera_->createRequest();
if (!request) {
std::cerr << "Can't create request" << std::endl;
return;
}
for (auto it = buffers.begin(); it != buffers.end(); ++it) {
Stream *stream = it->first;
FrameBuffer *buffer = it->second;
request->addBuffer(stream, buffer);
}
camera_->queueRequest(request);
}
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