/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * camera_metadata.cpp - libcamera Android Camera Metadata Helper
 */

#include "camera_metadata.h"

#include <libcamera/base/log.h>

using namespace libcamera;

LOG_DEFINE_CATEGORY(CameraMetadata)

CameraMetadata::CameraMetadata()
	: metadata_(nullptr), valid_(false), resized_(false)
{
}

CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity)
	: resized_(false)
{
	metadata_ = allocate_camera_metadata(entryCapacity, dataCapacity);
	valid_ = metadata_ != nullptr;
}

CameraMetadata::CameraMetadata(const camera_metadata_t *metadata)
	: resized_(false)
{
	metadata_ = clone_camera_metadata(metadata);
	valid_ = metadata_ != nullptr;
}

CameraMetadata::CameraMetadata(const CameraMetadata &other)
	: CameraMetadata(other.getMetadata())
{
}

CameraMetadata::~CameraMetadata()
{
	if (metadata_)
		free_camera_metadata(metadata_);
}

CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other)
{
	if (this == &other)
		return *this;

	if (metadata_)
		free_camera_metadata(metadata_);

	metadata_ = clone_camera_metadata(other.getMetadata());
	valid_ = metadata_ != nullptr;

	return *this;
}

std::tuple<size_t, size_t> CameraMetadata::usage() const
{
	size_t currentEntryCount = get_camera_metadata_entry_count(metadata_);
	size_t currentDataCount = get_camera_metadata_data_count(metadata_);

	return { currentEntryCount, currentDataCount };
}

bool CameraMetadata::getEntry(uint32_t tag, camera_metadata_ro_entry_t *entry) const
{
	if (find_camera_metadata_ro_entry(metadata_, tag, entry))
		return false;

	return true;
}

/*
 * \brief Resize the metadata container, if necessary
 * \param[in] count Number of entries to add to the container
 * \param[in] size Total size of entries to add, in bytes
 * \return True if resize was successful or unnecessary, false otherwise
 */
bool CameraMetadata::resize(size_t count, size_t size)
{
	if (!valid_)
		return false;

	if (!count && !size)
		return true;

	size_t currentEntryCount = get_camera_metadata_entry_count(metadata_);
	size_t currentEntryCapacity = get_camera_metadata_entry_capacity(metadata_);
	size_t newEntryCapacity = currentEntryCapacity < currentEntryCount + count ?
				  currentEntryCapacity * 2 : currentEntryCapacity;

	size_t currentDataCount = get_camera_metadata_data_count(metadata_);
	size_t currentDataCapacity = get_camera_metadata_data_capacity(metadata_);
	size_t newDataCapacity = currentDataCapacity < currentDataCount + size ?
				 currentDataCapacity * 2 : currentDataCapacity;

	if (newEntryCapacity > currentEntryCapacity ||
	    newDataCapacity > currentDataCapacity) {
		camera_metadata_t *oldMetadata = metadata_;
		metadata_ = allocate_camera_metadata(newEntryCapacity, newDataCapacity);
		if (!metadata_) {
			metadata_ = oldMetadata;
			return false;
		}

		LOG(CameraMetadata, Info)
			<< "Resized: old entry capacity " << currentEntryCapacity
			<< ", old data capacity " << currentDataCapacity
			<< ", new entry capacity " << newEntryCapacity
			<< ", new data capacity " << newDataCapacity;

		append_camera_metadata(metadata_, oldMetadata);
		free_camera_metadata(oldMetadata);

		resized_ = true;
	}

	return true;
}

template<> bool CameraMetadata::entryContains(uint32_t tag, uint8_t value) const
{
	camera_metadata_ro_entry_t entry;
	if (!getEntry(tag, &entry))
		return false;

	for (unsigned int i = 0; i < entry.count; i++) {
		if (entry.data.u8[i] == value)
			return true;
	}

	return false;
}

bool CameraMetadata::hasEntry(uint32_t tag) const
{
	camera_metadata_ro_entry_t entry;
	return getEntry(tag, &entry);
}

bool CameraMetadata::addEntry(uint32_t tag, const void *data, size_t count,
			      size_t elementSize)
{
	if (!valid_)
		return false;

	if (!resize(1, count * elementSize)) {
		LOG(CameraMetadata, Error) << "Failed to resize";
		valid_ = false;
		return false;
	}

	if (!add_camera_metadata_entry(metadata_, tag, data, count))
		return true;

	const char *name = get_camera_metadata_tag_name(tag);
	if (name)
		LOG(CameraMetadata, Error)
			<< "Failed to add tag " << name;
	else
		LOG(CameraMetadata, Error)
			<< "Failed to add unknown tag " << tag;

	valid_ = false;

	return false;
}

bool CameraMetadata::updateEntry(uint32_t tag, const void *data, size_t count,
				 size_t elementSize)
{
	if (!valid_)
		return false;

	camera_metadata_entry_t entry;
	int ret = find_camera_metadata_entry(metadata_, tag, &entry);
	if (ret) {
		const char *name = get_camera_metadata_tag_name(tag);
		LOG(CameraMetadata, Error)
			<< "Failed to update tag "
			<< (name ? name : "<unknown>") << ": not present";
		return false;
	}

	if (camera_metadata_type_size[entry.type] != elementSize) {
		const char *name = get_camera_metadata_tag_name(tag);
		LOG(CameraMetadata, Fatal)
			<< "Invalid element size for tag "
			<< (name ? name : "<unknown>");
		return false;
	}

	size_t oldSize =
		calculate_camera_metadata_entry_data_size(entry.type,
							  entry.count);
	size_t newSize =
		calculate_camera_metadata_entry_data_size(entry.type,
							  count);
	size_t sizeIncrement = newSize - oldSize > 0 ? newSize - oldSize : 0;
	if (!resize(0, sizeIncrement)) {
		LOG(CameraMetadata, Error) << "Failed to resize";
		valid_ = false;
		return false;
	}

	ret = update_camera_metadata_entry(metadata_, entry.index, data,
					   count, nullptr);
	if (!ret)
		return true;

	const char *name = get_camera_metadata_tag_name(tag);
	LOG(CameraMetadata, Error)
		<< "Failed to update tag " << (name ? name : "<unknown>");

	valid_ = false;

	return false;
}

camera_metadata_t *CameraMetadata::getMetadata()
{
	return valid_ ? metadata_ : nullptr;
}

const camera_metadata_t *CameraMetadata::getMetadata() const
{
	return valid_ ? metadata_ : nullptr;
}
'#n18'>18</a>
<a id='n19' href='#n19'>19</a>
<a id='n20' href='#n20'>20</a>
<a id='n21' href='#n21'>21</a>
<a id='n22' href='#n22'>22</a>
<a id='n23' href='#n23'>23</a>
<a id='n24' href='#n24'>24</a>
<a id='n25' href='#n25'>25</a>
<a id='n26' href='#n26'>26</a>
<a id='n27' href='#n27'>27</a>
<a id='n28' href='#n28'>28</a>
<a id='n29' href='#n29'>29</a>
<a id='n30' href='#n30'>30</a>
<a id='n31' href='#n31'>31</a>
<a id='n32' href='#n32'>32</a>
<a id='n33' href='#n33'>33</a>
<a id='n34' href='#n34'>34</a>
<a id='n35' href='#n35'>35</a>
<a id='n36' href='#n36'>36</a>
<a id='n37' href='#n37'>37</a>
<a id='n38' href='#n38'>38</a>
<a id='n39' href='#n39'>39</a>
<a id='n40' href='#n40'>40</a>
<a id='n41' href='#n41'>41</a>
<a id='n42' href='#n42'>42</a>
<a id='n43' href='#n43'>43</a>
<a id='n44' href='#n44'>44</a>
<a id='n45' href='#n45'>45</a>
<a id='n46' href='#n46'>46</a>
<a id='n47' href='#n47'>47</a>
<a id='n48' href='#n48'>48</a>
<a id='n49' href='#n49'>49</a>
<a id='n50' href='#n50'>50</a>
<a id='n51' href='#n51'>51</a>
<a id='n52' href='#n52'>52</a>
<a id='n53' href='#n53'>53</a>
<a id='n54' href='#n54'>54</a>
<a id='n55' href='#n55'>55</a>
<a id='n56' href='#n56'>56</a>
<a id='n57' href='#n57'>57</a>
<a id='n58' href='#n58'>58</a>
<a id='n59' href='#n59'>59</a>
<a id='n60' href='#n60'>60</a>
<a id='n61' href='#n61'>61</a>
<a id='n62' href='#n62'>62</a>
<a id='n63' href='#n63'>63</a>
<a id='n64' href='#n64'>64</a>
<a id='n65' href='#n65'>65</a>
<a id='n66' href='#n66'>66</a>
<a id='n67' href='#n67'>67</a>
<a id='n68' href='#n68'>68</a>
<a id='n69' href='#n69'>69</a>
<a id='n70' href='#n70'>70</a>
<a id='n71' href='#n71'>71</a>
<a id='n72' href='#n72'>72</a>
<a id='n73' href='#n73'>73</a>
<a id='n74' href='#n74'>74</a>
<a id='n75' href='#n75'>75</a>
<a id='n76' href='#n76'>76</a>
<a id='n77' href='#n77'>77</a>
<a id='n78' href='#n78'>78</a>
<a id='n79' href='#n79'>79</a>
<a id='n80' href='#n80'>80</a>
<a id='n81' href='#n81'>81</a>
<a id='n82' href='#n82'>82</a>
<a id='n83' href='#n83'>83</a>
<a id='n84' href='#n84'>84</a>
<a id='n85' href='#n85'>85</a>
<a id='n86' href='#n86'>86</a>
<a id='n87' href='#n87'>87</a>
<a id='n88' href='#n88'>88</a>
<a id='n89' href='#n89'>89</a>
<a id='n90' href='#n90'>90</a>
<a id='n91' href='#n91'>91</a>
</pre></td>
<td class='lines'><pre><code><span class="hl com">/* SPDX-License-Identifier: GPL-2.0-or-later */</span>
<span class="hl com">/*</span>
<span class="hl com"> * Copyright (C) 2019, Google Inc.</span>
<span class="hl com"> *</span>
<span class="hl com"> * libcamera V4L2 API tests</span>
<span class="hl com"> */</span>

<span class="hl ppc">#include &lt;iostream&gt;</span>

<span class="hl ppc">#include &lt;libcamera/buffer.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/event_dispatcher.h&gt;</span>
<span class="hl ppc">#include &lt;libcamera/timer.h&gt;</span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/thread.h&quot;</span><span class="hl ppc"></span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;v4l2_videodevice_test.h&quot;</span><span class="hl ppc"></span>

<span class="hl kwc">class</span> CaptureAsyncTest <span class="hl opt">:</span> <span class="hl kwc">public</span> V4L2VideoDeviceTest
<span class="hl opt">{</span>
<span class="hl kwc">public</span><span class="hl opt">:</span>
	<span class="hl kwd">CaptureAsyncTest</span><span class="hl opt">()</span>
		<span class="hl opt">:</span> <span class="hl kwd">V4L2VideoDeviceTest</span><span class="hl opt">(</span><span class="hl str">&quot;vimc&quot;</span><span class="hl opt">,</span> <span class="hl str">&quot;Raw Capture 0&quot;</span><span class="hl opt">),</span> <span class="hl kwd">frames</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">) {}</span>

	<span class="hl kwb">void</span> <span class="hl kwd">receiveBuffer</span><span class="hl opt">(</span>FrameBuffer <span class="hl opt">*</span>buffer<span class="hl opt">)</span>
	<span class="hl opt">{