/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* v4l2_subdevice_test.cpp - VIMC-based V4L2 subdevice test
*/
#include <iostream>
#include <string.h>
#include <sys/stat.h>
#include "device_enumerator.h"
#include "media_device.h"
#include "v4l2_subdevice.h"
#include "v4l2_subdevice_test.h"
using namespace std;
using namespace libcamera;
/*
* This test runs on vimc media device. For a description of vimc, in the
* context of libcamera testing, please refer to
* 'test/media_device/media_device_link_test.cpp' file.
*
* If the vimc module is not loaded, the test gets skipped.
*/
int V4L2SubdeviceTest::init()
{
enumerator_ = DeviceEnumerator::create();
if (!enumerator_) {
cerr << "Failed to create device enumerator" << endl;
return TestFail;
}
if (enumerator_->enumerate()) {
cerr << "Failed to enumerate media devices" << endl;
return TestFail;
}
DeviceMatch dm("vimc");
media_ = enumerator_->search(dm);
if (!media_) {
cerr << "Unable to find \'vimc\' media device node" << endl;
return TestSkip;
}
MediaEntity *videoEntity = media_->getEntityByName("Scaler");
if (!videoEntity) {
cerr << "Unable to find media entity 'Scaler'" << endl;
return TestFail;
}
scaler_ = new V4L2Subdevice(videoEntity);
if (scaler_->open()) {
cerr << "Unable to open video subdevice "
<< scaler_->entity()->deviceNode() << endl;
return TestSkip;
}
return 0;
}
void V4L2SubdeviceTest::cleanup()
{
delete scaler_;
}
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<td class='lines'><pre><code><span class="hl com">/* SPDX-License-Identifier: LGPL-2.1-or-later */</span>
<span class="hl com">/*</span>
<span class="hl com"> * Copyright (C) 2020, Google Inc.</span>
<span class="hl com"> *</span>
<span class="hl com"> * thumbnailer.cpp - Simple image thumbnailer</span>
<span class="hl com"> */</span>
<span class="hl ppc">#include</span> <span class="hl pps">"thumbnailer.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include <libcamera/formats.h></span>
<span class="hl ppc">#include</span> <span class="hl pps">"libcamera/internal/log.h"</span><span class="hl ppc"></span>
<span class="hl kwa">using namespace</span> libcamera<span class="hl opt">;</span>
<span class="hl kwd">LOG_DEFINE_CATEGORY</span><span class="hl opt">(</span>Thumbnailer<span class="hl opt">)</span>
<span class="hl kwc">Thumbnailer</span><span class="hl opt">::</span><span class="hl kwd">Thumbnailer</span><span class="hl opt">()</span>
<span class="hl opt">:</span> <span class="hl kwd">valid_</span><span class="hl opt">(</span><span class="hl kwa">false</span><span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl opt">}</span>
<span class="hl kwb">void</span> <span class="hl kwc">Thumbnailer</span><span class="hl opt">::</span><span class="hl kwd">configure</span><span class="hl opt">(</span><span class="hl kwb">const</span> Size <span class="hl opt">&</span>sourceSize<span class="hl opt">,</span> PixelFormat pixelFormat<span class="hl opt">)</span>
<span class="hl opt">{</span>
sourceSize_ <span class="hl opt">=</span> sourceSize<span class="hl opt">;</span>
pixelFormat_ <span class="hl opt">=</span> pixelFormat<span class="hl opt">;</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>pixelFormat_ <span class="hl opt">!=</span> <span class="hl kwc">formats</span><span class="hl opt">::</span>NV12<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>Thumbnailer<span class="hl opt">,</span> Error<span class="hl opt">)</span>
<span class="hl opt"><<</span> <span class="hl str">"Failed to configure: Pixel Format "</span>
<span class="hl opt"><<</span> pixelFormat_<span class="hl opt">.</span><span class="hl kwd">toString</span><span class="hl opt">() <<</span> <span class="hl str">" unsupported."</span><span class="hl opt">;</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
valid_ <span class="hl opt">=</span> <span class="hl kwa">true</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">void</span> <span class="hl kwc">Thumbnailer</span><span class="hl opt">::</span><span class="hl kwd">createThumbnail</span><span class="hl opt">(</span><span class="hl kwb">const</span> FrameBuffer <span class="hl opt">&</span>source<span class="hl opt">,</span>
<span class="hl kwb">const</span> Size <span class="hl opt">&</span>targetSize<span class="hl opt">,</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>vector<span class="hl opt"><</span><span class="hl kwb">unsigned char</span><span class="hl opt">> *</span>destination<span class="hl opt">)</span>
<span class="hl opt">{</span>
MappedFrameBuffer <span class="hl kwd">frame</span><span class="hl opt">(&</span>source<span class="hl opt">,</span> PROT_READ<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>frame<span class="hl opt">.</span><span class="hl kwd">isValid</span><span class="hl opt">()) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>Thumbnailer<span class="hl opt">,</span> Error<span class="hl opt">)</span>
<span class="hl opt"><<</span> <span class="hl str">"Failed to map FrameBuffer : "</span>
<span class="hl opt"><<</span> <span class="hl kwd">strerror</span><span class="hl opt">(</span>frame<span class="hl opt">.</span><span class="hl kwd">error</span><span class="hl opt">());</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>valid_<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>Thumbnailer<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Config is unconfigured or invalid."</span><span class="hl opt">;</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">const unsigned int</span> sw <span class="hl opt">=</span> sourceSize_<span class="hl opt">.</span>width<span class="hl opt">;</span>
<span class="hl kwb">const unsigned int</span> sh <span class="hl opt">=</span> sourceSize_<span class="hl opt">.</span>height<span class="hl opt">;</span>
<span class="hl kwb">const unsigned int</span> tw <span class="hl opt">=</span> targetSize<span class="hl opt">.</span>width<span class="hl opt">;</span>
<span class="hl kwb">const unsigned int</span> th <span class="hl opt">=</span> targetSize<span class="hl opt">.</span>height<span class="hl opt">;</span>
<span class="hl kwd">ASSERT</span><span class="hl opt">(</span>tw <span class="hl opt">%</span> <span class="hl num">2</span> <span class="hl opt">==</span> <span class="hl num">0</span> <span class="hl opt">&&</span> th <span class="hl opt">%</span> <span class="hl num">2</span> <span class="hl opt">==</span> <span class="hl num">0</span><span class="hl opt">);</span>
<span class="hl com">/* Image scaling block implementing nearest-neighbour algorithm. */</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>src <span class="hl opt">=</span> <span class="hl kwa">static_cast</span><span class="hl opt"><</span><span class="hl kwb">unsigned char</span> <span class="hl opt">*>(</span>frame<span class="hl opt">.</span><span class="hl kwd">maps</span><span class="hl opt">()[</span><span class="hl num">0</span><span class="hl opt">].</span><span class="hl kwd">data</span><span class="hl opt">());</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>srcC <span class="hl opt">=</span> src <span class="hl opt">+</span> sh <span class="hl opt">*</span> sw<span class="hl opt">;</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>srcCb<span class="hl opt">, *</span>srcCr<span class="hl opt">;</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>dstY<span class="hl opt">, *</span>srcY<span class="hl opt">;</span>
<span class="hl kwb">size_t</span> dstSize <span class="hl opt">= (</span>th <span class="hl opt">*</span> tw<span class="hl opt">) + ((</span>th <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> tw<span class="hl opt">);</span>
destination<span class="hl opt">-></span><span class="hl kwd">resize</span><span class="hl opt">(</span>dstSize<span class="hl opt">);</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>dst <span class="hl opt">=</span> destination<span class="hl opt">-></span><span class="hl kwd">data</span><span class="hl opt">();</span>
<span class="hl kwb">unsigned char</span> <span class="hl opt">*</span>dstC <span class="hl opt">=</span> dst <span class="hl opt">+</span> th <span class="hl opt">*</span> tw<span class="hl opt">;</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span><span class="hl kwb">unsigned int</span> y <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span> y <span class="hl opt"><</span> th<span class="hl opt">;</span> y <span class="hl opt">+=</span> <span class="hl num">2</span><span class="hl opt">) {</span>
<span class="hl kwb">unsigned int</span> sourceY <span class="hl opt">= (</span>sh <span class="hl opt">*</span> y <span class="hl opt">+</span> th <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) /</span> th<span class="hl opt">;</span>
dstY <span class="hl opt">=</span> dst <span class="hl opt">+</span> y <span class="hl opt">*</span> tw<span class="hl opt">;</span>
srcY <span class="hl opt">=</span> src <span class="hl opt">+</span> sw <span class="hl opt">*</span> sourceY<span class="hl opt">;</span>
srcCb <span class="hl opt">=</span> srcC <span class="hl opt">+ (</span>sourceY <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> sw <span class="hl opt">+</span> <span class="hl num">0</span><span class="hl opt">;</span>
srcCr <span class="hl opt">=</span> srcC <span class="hl opt">+ (</span>sourceY <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> sw <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">;</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span><span class="hl kwb">unsigned int</span> x <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span> x <span class="hl opt"><</span> tw<span class="hl opt">;</span> x <span class="hl opt">+=</span> <span class="hl num">2</span><span class="hl opt">) {</span>
<span class="hl kwb">unsigned int</span> sourceX <span class="hl opt">= (</span>sw <span class="hl opt">*</span> x <span class="hl opt">+</span> tw <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) /</span> tw<span class="hl opt">;</span>
dstY<span class="hl opt">[</span>x<span class="hl opt">] =</span> srcY<span class="hl opt">[</span>sourceX<span class="hl opt">];</span>
dstY<span class="hl opt">[</span>tw <span class="hl opt">+</span> x<span class="hl opt">] =</span> srcY<span class="hl opt">[</span>sw <span class="hl opt">+</span> sourceX<span class="hl opt">];</span>
dstY<span class="hl opt">[</span>x <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">] =</span> srcY<span class="hl opt">[</span>sourceX <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">];</span>
dstY<span class="hl opt">[</span>tw <span class="hl opt">+</span> x <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">] =</span> srcY<span class="hl opt">[</span>sw <span class="hl opt">+</span> sourceX <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">];</span>
dstC<span class="hl opt">[(</span>y <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> tw <span class="hl opt">+</span> x <span class="hl opt">+</span> <span class="hl num">0</span><span class="hl opt">] =</span> srcCb<span class="hl opt">[(</span>sourceX <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> <span class="hl num">2</span><span class="hl opt">];</span>
dstC<span class="hl opt">[(</span>y <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> tw <span class="hl opt">+</span> x <span class="hl opt">+</span> <span class="hl num">1</span><span class="hl opt">] =</span> srcCr<span class="hl opt">[(</span>sourceX <span class="hl opt">/</span> <span class="hl num">2</span><span class="hl opt">) *</span> <span class="hl num">2</span><span class="hl opt">];</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
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