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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2018-2019, Google Inc.
*
* media_device_print_test.cpp - Print out media devices
*/
#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "libcamera/internal/media_device.h"
#include "test.h"
using namespace libcamera;
using namespace std;
/*
* MediaDevicePrintTest takes all media devices found in the system and print
* them out to verify correctness.
*
* If no accessible media device is found, the test is skipped.
*/
class MediaDevicePrintTest : public Test
{
protected:
int init() { return 0; }
int run();
void cleanup() {}
private:
int testMediaDevice(string deviceNode);
void printMediaGraph(const MediaDevice &media, ostream &os);
void printLinkFlags(const MediaLink *link, ostream &os);
void printNode(const MediaPad *pad, ostream &os);
};
void MediaDevicePrintTest::printNode(const MediaPad *pad, ostream &os)
{
const MediaEntity *entity = pad->entity();
os << "\"" << entity->name() << "\"["
<< pad->index() << "]";
}
void MediaDevicePrintTest::printLinkFlags(const MediaLink *link, ostream &os)
{
unsigned int flags = link->flags();
os << " [";
if (flags) {
os << (flags & MEDIA_LNK_FL_ENABLED ? "ENABLED," : "")
<< (flags & MEDIA_LNK_FL_IMMUTABLE ? "IMMUTABLE" : "");
}
os << "]\n";
}
/*
* For each entity in the media graph, printout links directed to its sinks
* and source pads.
*/
void MediaDevicePrintTest::printMediaGraph(const MediaDevice &media, ostream &os)
{
os << "\n" << media.driver() << " - " << media.deviceNode() << "\n\n";
for (auto const &entity : media.entities()) {
os << "\"" << entity->name() << "\"\n";
for (auto const &sink : entity->pads()) {
if (!(sink->flags() & MEDIA_PAD_FL_SINK))
continue;
os << " [" << sink->index() << "]" << ": Sink\n";
for (auto const &link : sink->links()) {
os << "\t";
printNode(sink, os);
os << " <- ";
printNode(link->source(), os);
printLinkFlags(link, os);
}
os << "\n";
}
for (auto const &source : entity->pads()) {
if (!(source->flags() & MEDIA_PAD_FL_SOURCE))
continue;
os << " [" << source->index() << "]" << ": Source\n";
for (auto const &link : source->links()) {
os << "\t";
printNode(source, os);
os << " -> ";
printNode(link->sink(), os);
printLinkFlags(link, os);
}
os << "\n";
}
}
os.flush();
}
/* Test a single media device. */
int MediaDevicePrintTest::testMediaDevice(const string deviceNode)
{
MediaDevice dev(deviceNode);
int ret;
ret = dev.populate();
if (ret)
return ret;
/* Print out the media graph. */
printMediaGraph(dev, cerr);
return 0;
}
/* Run tests on all media devices. */
#define MAX_MEDIA_DEV 256
int MediaDevicePrintTest::run()
{
const string deviceNode("/dev/media");
unsigned int i;
int ret = 77; /* skip test exit code */
/*
* Run the test sequence on all media device found in the
* system, if any.
*/
for (i = 0; i < MAX_MEDIA_DEV; i++) {
string mediadev = deviceNode + to_string(i);
struct stat pstat = {};
if (stat(mediadev.c_str(), &pstat))
continue;
ret = testMediaDevice(mediadev);
if (ret)
return ret;
}
return ret;
}
TEST_REGISTER(MediaDevicePrintTest)
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