/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* ipa_vimc.cpp - Vimc Image Processing Algorithm module
*/
#include <ipa/ipa_vimc.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <iostream>
#include <ipa/ipa_interface.h>
#include <ipa/ipa_module_info.h>
#include <libipa/ipa_interface_wrapper.h>
#include "file.h"
#include "log.h"
namespace libcamera {
LOG_DEFINE_CATEGORY(IPAVimc)
class IPAVimc : public IPAInterface
{
public:
IPAVimc();
~IPAVimc();
int init(const IPASettings &settings) override;
int start() override;
void stop() override;
void configure(const CameraSensorInfo &sensorInfo,
const std::map<unsigned int, IPAStream> &streamConfig,
const std::map<unsigned int, const ControlInfoMap &> &entityControls) override {}
void mapBuffers(const std::vector<IPABuffer> &buffers) override {}
void unmapBuffers(const std::vector<unsigned int> &ids) override {}
void processEvent(const IPAOperationData &event) override {}
private:
void initTrace();
void trace(enum IPAOperationCode operation);
int fd_;
};
IPAVimc::IPAVimc()
: fd_(-1)
{
initTrace();
}
IPAVimc::~IPAVimc()
{
if (fd_)
::close(fd_);
}
int IPAVimc::init(const IPASettings &settings)
{
trace(IPAOperationInit);
LOG(IPAVimc, Debug)
<< "initializing vimc IPA with configuration file "
<< settings.configurationFile;
File conf(settings.configurationFile);
if (!conf.open(File::ReadOnly)) {
LOG(IPAVimc, Error) << "Failed to open configuration file";
return -EINVAL;
}
return 0;
}
int IPAVimc::start()
{
trace(IPAOperationStart);
LOG(IPAVimc, Debug) << "start vimc IPA!";
return 0;
}
void IPAVimc::stop()
{
trace(IPAOperationStop);
LOG(IPAVimc, Debug) << "stop vimc IPA!";
}
void IPAVimc::initTrace()
{
struct stat fifoStat;
int ret = stat(VIMC_IPA_FIFO_PATH, &fifoStat);
if (ret)
return;
ret = ::open(VIMC_IPA_FIFO_PATH, O_WRONLY);
if (ret < 0) {
ret = errno;
LOG(IPAVimc, Error) << "Failed to open vimc IPA test FIFO: "
<< strerror(ret);
return;
}
fd_ = ret;
}
void IPAVimc::trace(enum IPAOperationCode operation)
{
if (fd_ < 0)
return;
int ret = ::write(fd_, &operation, sizeof(operation));
if (ret < 0) {
ret = errno;
LOG(IPAVimc, Error) << "Failed to write to vimc IPA test FIFO: "
<< strerror(ret);
}
}
/*
* External IPA module interface
*/
extern "C" {
const struct IPAModuleInfo ipaModuleInfo = {
IPA_MODULE_API_VERSION,
0,
"PipelineHandlerVimc",
"vimc",
};
struct ipa_context *ipaCreate()
{
return new IPAInterfaceWrapper(std::make_unique<IPAVimc>());
}
}
} /* namespace libcamera */
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</pre></td>
<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) 2019, Collabora Ltd.</span>
<span class="hl com"> * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com></span>
<span class="hl com"> *</span>
<span class="hl com"> * gstlibcamerasrc.cpp - GStreamer Capture Element</span>
<span class="hl com"> */</span>
<span class="hl com">/**</span>
<span class="hl com"> * \todo The following is a list of items that needs implementation in the GStreamer plugin</span>
<span class="hl com"> * - Implement GstElement::send_event</span>
<span class="hl com"> * + Allowing application to send EOS</span>
<span class="hl com"> * + Allowing application to use FLUSH/FLUSH_STOP</span>
<span class="hl com"> * + Prevent the main thread from accessing streaming thread</span>
<span class="hl com"> * - Implement renegotiation (even if slow)</span>
<span class="hl com"> * - Implement GstElement::request-new-pad (multi stream)</span>
<span class="hl com"> * + Evaluate if a single streaming thread is fine</span>
<span class="hl com"> * - Add application driven request (snapshot)</span>
<span class="hl com"> * - Add framerate control</span>
<span class="hl com"> * - Add buffer importation support</span>
<span class="hl com"> *</span>
<span class="hl com"> * Requires new libcamera API:</span>
<span class="hl com"> * - Add framerate negotiation support</span>
<span class="hl com"> * - Add colorimetry support</span>
<span class="hl com"> * - Add timestamp support</span>
<span class="hl com"> * - Use unique names to select the camera devices</span>
<span class="hl com"> * - Add GstVideoMeta support (strides and offsets)</span>
<span class="hl com"> *</span>
<span class="hl com"> * \todo libcamera UVC drivers picks the lowest possible resolution first, this</span>
<span class="hl com"> * should be fixed so that we get a decent resolution and framerate for the</span>
<span class="hl com"> * role by default.</span>
<span class="hl com"> */</span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcamerasrc.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include <queue></span>
<span class="hl ppc">#include <vector></span>
<span class="hl ppc">#include <gst/base/base.h></span>
<span class="hl ppc">#include <libcamera/camera.h></span>
<span class="hl ppc">#include <libcamera/camera_manager.h></span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcameraallocator.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcamerapad.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcamerapool.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcamera-utils.h"</span><span class="hl ppc"></span>
<span class="hl kwa">using namespace</span> libcamera<span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_CATEGORY_STATIC</span><span class="hl opt">(</span>source_debug<span class="hl opt">);</span>
<span class="hl ppc">#define GST_CAT_DEFAULT source_debug</span>
<span class="hl kwb">struct</span> RequestWrap <span class="hl opt">{</span>
<span class="hl kwd">RequestWrap</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>Request<span class="hl opt">></span> request<span class="hl opt">);</span>
<span class="hl opt">~</span><span class="hl kwd">RequestWrap</span><span class="hl opt">();</span>
<span class="hl kwb">void</span> <span class="hl kwd">attachBuffer</span><span class="hl opt">(</span>GstBuffer <span class="hl opt">*</span>buffer<span class="hl opt">);</span>
GstBuffer <span class="hl opt">*</span><span class="hl kwd">detachBuffer</span><span class="hl opt">(</span>Stream <span class="hl opt">*</span>stream<span class="hl opt">);</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>Request<span class="hl opt">></span> request_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>map<span class="hl opt"><</span>Stream <span class="hl opt">*,</span> GstBuffer <span class="hl opt">*></span> buffers_<span class="hl opt">;</span>
<span class="hl opt">};</span>
<span class="hl kwc">RequestWrap</span><span class="hl opt">::</span><span class="hl kwd">RequestWrap</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>Request<span class="hl opt">></span> request<span class="hl opt">)</span>
<span class="hl opt">:</span> <span class="hl kwd">request_</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>request<span class="hl opt">))</span>
<span class="hl opt">{</span>
<span class="hl opt">}</span>
<span class="hl kwc">RequestWrap</span><span class="hl opt">::~</span><span class="hl kwd">RequestWrap</span><span class="hl opt">()</span>
<span class="hl opt">{</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span>pair<span class="hl opt"><</span>Stream <span class="hl opt">*</span><span class="hl kwb">const</span><span class="hl opt">,</span> GstBuffer <span class="hl opt">*> &</span>item <span class="hl opt">:</span> buffers_<span class="hl opt">) {</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>item<span class="hl opt">.</span>second<span class="hl opt">)</span>
<span class="hl kwd">gst_buffer_unref</span><span class="hl opt">(</span>item<span class="hl opt">.</span>second<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">RequestWrap</span><span class="hl opt">::</span><span class="hl kwd">attachBuffer</span><span class="hl opt">(</span>GstBuffer <span class="hl opt">*</span>buffer<span class="hl opt">)</span>
<span class="hl opt">{</span>
FrameBuffer <span class="hl opt">*</span>fb <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_buffer_get_frame_buffer</span><span class="hl opt">(</span>buffer<span class="hl opt">);</span>
Stream <span class="hl opt">*</span>stream <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_buffer_get_stream</span><span class="hl opt">(</span>buffer<span class="hl opt">);</span>
request_<span class="hl opt">-></span><span class="hl kwd">addBuffer</span><span class="hl opt">(</span>stream<span class="hl opt">,</span> fb<span class="hl opt">);</span>
<span class="hl kwc">auto</span> item <span class="hl opt">=</span> buffers_<span class="hl opt">.</span><span class="hl kwd">find</span><span class="hl opt">(</span>stream<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>item <span class="hl opt">!=</span> buffers_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">()) {</span>
<span class="hl kwd">gst_buffer_unref</span><span class="hl opt">(</span>item<span class="hl opt">-></span>second<span class="hl opt">);</span>
item<span class="hl opt">-></span>second <span class="hl opt">=</span> buffer<span class="hl opt">;</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
buffers_<span class="hl opt">[</span>stream<span class="hl opt">] =</span> buffer<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
GstBuffer <span class="hl opt">*</span><span class="hl kwc">RequestWrap</span><span class="hl opt">::</span><span class="hl kwd">detachBuffer</span><span class="hl opt">(</span>Stream <span class="hl opt">*</span>stream<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstBuffer <span class="hl opt">*</span>buffer <span class="hl opt">=</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
<span class="hl kwc">auto</span> item <span class="hl opt">=</span> buffers_<span class="hl opt">.</span><span class="hl kwd">find</span><span class="hl opt">(</span>stream<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>item <span class="hl opt">!=</span> buffers_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">()) {</span>
buffer <span class="hl opt">=</span> item<span class="hl opt">-></span>second<span class="hl opt">;</span>
item<span class="hl opt">-></span>second <span class="hl opt">=</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">return</span> buffer<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/* Used for C++ object with destructors. */</span>
<span class="hl kwb">struct</span> GstLibcameraSrcState <span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>src_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraManager<span class="hl opt">></span> cm_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>shared_ptr<span class="hl opt"><</span>Camera<span class="hl opt">></span> cam_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraConfiguration<span class="hl opt">></span> config_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>vector<span class="hl opt"><</span>GstPad <span class="hl opt">*></span> srcpads_<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>queue<span class="hl opt"><</span><span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>RequestWrap<span class="hl opt">>></span> requests_<span class="hl opt">;</span>
<span class="hl kwb">void</span> <span class="hl kwd">requestCompleted</span><span class="hl opt">(</span>Request <span class="hl opt">*</span>request<span class="hl opt">);</span>
<span class="hl opt">};</span>
<span class="hl kwb">struct</span> _GstLibcameraSrc <span class="hl opt">{</span>
GstElement parent<span class="hl opt">;</span>
GRecMutex stream_lock<span class="hl opt">;</span>
GstTask <span class="hl opt">*</span>task<span class="hl opt">;</span>
gchar <span class="hl opt">*</span>camera_name<span class="hl opt">;</span>
GstLibcameraSrcState <span class="hl opt">*</span>state<span class="hl opt">;</span>
GstLibcameraAllocator <span class="hl opt">*</span>allocator<span class="hl opt">;</span>
GstFlowCombiner <span class="hl opt">*</span>flow_combiner<span class="hl opt">;</span>
<span class="hl opt">};</span>
<span class="hl kwb">enum</span> <span class="hl opt">{</span>
PROP_0<span class="hl opt">,</span>
PROP_CAMERA_NAME
<span class="hl opt">};</span>
<span class="hl kwd">G_DEFINE_TYPE_WITH_CODE</span><span class="hl opt">(</span>GstLibcameraSrc<span class="hl opt">,</span> gst_libcamera_src<span class="hl opt">,</span> GST_TYPE_ELEMENT<span class="hl opt">,</span>
<span class="hl kwd">GST_DEBUG_CATEGORY_INIT</span><span class="hl opt">(</span>source_debug<span class="hl opt">,</span> <span class="hl str">"libcamerasrc"</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span>
<span class="hl str">"libcamera Source"</span><span class="hl opt">))</span>
<span class="hl ppc">#define TEMPLATE_CAPS GST_STATIC_CAPS(</span><span class="hl pps">"video/x-raw; image/jpeg"</span><span class="hl ppc">)</span>
<span class="hl com">/* For the simple case, we have a src pad that is always present. */</span>
GstStaticPadTemplate src_template <span class="hl opt">= {</span>
<span class="hl str">"src"</span><span class="hl opt">,</span> GST_PAD_SRC<span class="hl opt">,</span> GST_PAD_ALWAYS<span class="hl opt">,</span> TEMPLATE_CAPS
<span class="hl opt">};</span>
<span class="hl com">/* More pads can be requested in state < PAUSED */</span>
GstStaticPadTemplate request_src_template <span class="hl opt">= {</span>
<span class="hl str">"src_%s"</span><span class="hl opt">,</span> GST_PAD_SRC<span class="hl opt">,</span> GST_PAD_REQUEST<span class="hl opt">,</span> TEMPLATE_CAPS
<span class="hl opt">};</span>
<span class="hl kwb">void</span>
<span class="hl kwc">GstLibcameraSrcState</span><span class="hl opt">::</span><span class="hl kwd">requestCompleted</span><span class="hl opt">(</span>Request <span class="hl opt">*</span>request<span class="hl opt">)</span>
<span class="hl opt">{</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>src_<span class="hl opt">));</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>src_<span class="hl opt">,</span> <span class="hl str">"buffers are ready"</span><span class="hl opt">);</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>RequestWrap<span class="hl opt">></span> wrap <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>requests_<span class="hl opt">.</span><span class="hl kwd">front</span><span class="hl opt">());</span>
requests_<span class="hl opt">.</span><span class="hl kwd">pop</span><span class="hl opt">();</span>
<span class="hl kwd">g_return_if_fail</span><span class="hl opt">(</span>wrap<span class="hl opt">-></span>request_<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">() ==</span> request<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">((</span>request<span class="hl opt">-></span><span class="hl kwd">status</span><span class="hl opt">() ==</span> <span class="hl kwc">Request</span><span class="hl opt">::</span>RequestCancelled<span class="hl opt">)) {</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>src_<span class="hl opt">,</span> <span class="hl str">"Request was cancelled"</span><span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
GstBuffer <span class="hl opt">*</span>buffer<span class="hl opt">;</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> srcpads_<span class="hl opt">) {</span>
Stream <span class="hl opt">*</span>stream <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_pad_get_stream</span><span class="hl opt">(</span>srcpad<span class="hl opt">);</span>
buffer <span class="hl opt">=</span> wrap<span class="hl opt">-></span><span class="hl kwd">detachBuffer</span><span class="hl opt">(</span>stream<span class="hl opt">);</span>
FrameBuffer <span class="hl opt">*</span>fb <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_buffer_get_frame_buffer</span><span class="hl opt">(</span>buffer<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span><span class="hl kwd">GST_ELEMENT_CLOCK</span><span class="hl opt">(</span>src_<span class="hl opt">)) {</span>
GstClockTime gst_base_time <span class="hl opt">=</span> <span class="hl kwd">GST_ELEMENT</span><span class="hl opt">(</span>src_<span class="hl opt">)-></span>base_time<span class="hl opt">;</span>
GstClockTime gst_now <span class="hl opt">=</span> <span class="hl kwd">gst_clock_get_time</span><span class="hl opt">(</span><span class="hl kwd">GST_ELEMENT_CLOCK</span><span class="hl opt">(</span>src_<span class="hl opt">));</span>
<span class="hl com">/* \todo Need to expose which reference clock the timestamp relates to. */</span>
GstClockTime sys_now <span class="hl opt">=</span> <span class="hl kwd">g_get_monotonic_time</span><span class="hl opt">() *</span> <span class="hl num">1000</span><span class="hl opt">;</span>
<span class="hl com">/* Deduced from: sys_now - sys_base_time == gst_now - gst_base_time */</span>
GstClockTime sys_base_time <span class="hl opt">=</span> sys_now <span class="hl opt">- (</span>gst_now <span class="hl opt">-</span> gst_base_time<span class="hl opt">);</span>
<span class="hl kwd">GST_BUFFER_PTS</span><span class="hl opt">(</span>buffer<span class="hl opt">) =</span> fb<span class="hl opt">-></span><span class="hl kwd">metadata</span><span class="hl opt">().</span>timestamp <span class="hl opt">-</span> sys_base_time<span class="hl opt">;</span>
<span class="hl kwd">gst_libcamera_pad_set_latency</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> sys_now <span class="hl opt">-</span> fb<span class="hl opt">-></span><span class="hl kwd">metadata</span><span class="hl opt">().</span>timestamp<span class="hl opt">);</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
<span class="hl kwd">GST_BUFFER_PTS</span><span class="hl opt">(</span>buffer<span class="hl opt">) =</span> <span class="hl num">0</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwd">GST_BUFFER_OFFSET</span><span class="hl opt">(</span>buffer<span class="hl opt">) =</span> fb<span class="hl opt">-></span><span class="hl kwd">metadata</span><span class="hl opt">().</span>sequence<span class="hl opt">;</span>
<span class="hl kwd">GST_BUFFER_OFFSET_END</span><span class="hl opt">(</span>buffer<span class="hl opt">) =</span> fb<span class="hl opt">-></span><span class="hl kwd">metadata</span><span class="hl opt">().</span>sequence<span class="hl opt">;</span>
<span class="hl kwd">gst_libcamera_pad_queue_buffer</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> buffer<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwd">gst_libcamera_resume_task</span><span class="hl opt">(</span><span class="hl kwa">this</span><span class="hl opt">-></span>src_<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static bool</span>
<span class="hl kwd">gst_libcamera_src_open</span><span class="hl opt">(</span>GstLibcameraSrc <span class="hl opt">*</span>self<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraManager<span class="hl opt">></span> cm <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span>make_unique<span class="hl opt"><</span>CameraManager<span class="hl opt">>();</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>shared_ptr<span class="hl opt"><</span>Camera<span class="hl opt">></span> cam<span class="hl opt">;</span>
gint ret <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Opening camera device ..."</span><span class="hl opt">);</span>
ret <span class="hl opt">=</span> cm<span class="hl opt">-></span><span class="hl kwd">start</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> LIBRARY<span class="hl opt">,</span> INIT<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed listing cameras."</span><span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::CameraMananger::start() failed: %s"</span><span class="hl opt">,</span> <span class="hl kwd">g_strerror</span><span class="hl opt">(-</span>ret<span class="hl opt">)));</span>
<span class="hl kwa">return false</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
g_autofree gchar <span class="hl opt">*</span>camera_name <span class="hl opt">=</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
<span class="hl opt">{</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">));</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>self<span class="hl opt">-></span>camera_name<span class="hl opt">)</span>
camera_name <span class="hl opt">=</span> <span class="hl kwd">g_strdup</span><span class="hl opt">(</span>self<span class="hl opt">-></span>camera_name<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>camera_name<span class="hl opt">) {</span>
cam <span class="hl opt">=</span> cm<span class="hl opt">-></span><span class="hl kwd">get</span><span class="hl opt">(</span>self<span class="hl opt">-></span>camera_name<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>cam<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> NOT_FOUND<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Could not find a camera named '%s'."</span><span class="hl opt">,</span> self<span class="hl opt">-></span>camera_name<span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::CameraMananger::get() returned nullptr"</span><span class="hl opt">));</span>
<span class="hl kwa">return false</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>cm<span class="hl opt">-></span><span class="hl kwd">cameras</span><span class="hl opt">().</span><span class="hl kwd">empty</span><span class="hl opt">()) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> NOT_FOUND<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Could not find any supported camera on this system."</span><span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::CameraMananger::cameras() is empty"</span><span class="hl opt">));</span>
<span class="hl kwa">return false</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
cam <span class="hl opt">=</span> cm<span class="hl opt">-></span><span class="hl kwd">cameras</span><span class="hl opt">()[</span><span class="hl num">0</span><span class="hl opt">];</span>
<span class="hl opt">}</span>
<span class="hl kwd">GST_INFO_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Using camera '%s'"</span><span class="hl opt">,</span> cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">());</span>
ret <span class="hl opt">=</span> cam<span class="hl opt">-></span><span class="hl kwd">acquire</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> BUSY<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Camera '%s' is already in use."</span><span class="hl opt">,</span> cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">()),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::Camera::acquire() failed: %s"</span><span class="hl opt">,</span> <span class="hl kwd">g_strerror</span><span class="hl opt">(</span>ret<span class="hl opt">)));</span>
<span class="hl kwa">return false</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
cam<span class="hl opt">-></span>requestCompleted<span class="hl opt">.</span><span class="hl kwd">connect</span><span class="hl opt">(</span>self<span class="hl opt">-></span>state<span class="hl opt">, &</span><span class="hl kwc">GstLibcameraSrcState</span><span class="hl opt">::</span>requestCompleted<span class="hl opt">);</span>
<span class="hl com">/* No need to lock here, we didn't start our threads yet. */</span>
self<span class="hl opt">-></span>state<span class="hl opt">-></span>cm_ <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>cm<span class="hl opt">);</span>
self<span class="hl opt">-></span>state<span class="hl opt">-></span>cam_ <span class="hl opt">=</span> cam<span class="hl opt">;</span>
<span class="hl kwa">return true</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_task_run</span><span class="hl opt">(</span>gpointer user_data<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>user_data<span class="hl opt">);</span>
GstLibcameraSrcState <span class="hl opt">*</span>state <span class="hl opt">=</span> self<span class="hl opt">-></span>state<span class="hl opt">;</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>Request<span class="hl opt">></span> request <span class="hl opt">=</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">createRequest</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>request<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> NO_SPACE_LEFT<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed to allocate request for camera '%s'."</span><span class="hl opt">,</span>
state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">()),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::Camera::createRequest() failed"</span><span class="hl opt">));</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>RequestWrap<span class="hl opt">></span> wrap <span class="hl opt">=</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>make_unique<span class="hl opt"><</span>RequestWrap<span class="hl opt">>(</span><span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>request<span class="hl opt">));</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">) {</span>
GstLibcameraPool <span class="hl opt">*</span>pool <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_pad_get_pool</span><span class="hl opt">(</span>srcpad<span class="hl opt">);</span>
GstBuffer <span class="hl opt">*</span>buffer<span class="hl opt">;</span>
GstFlowReturn ret<span class="hl opt">;</span>
ret <span class="hl opt">=</span> <span class="hl kwd">gst_buffer_pool_acquire_buffer</span><span class="hl opt">(</span><span class="hl kwd">GST_BUFFER_POOL</span><span class="hl opt">(</span>pool<span class="hl opt">),</span>
<span class="hl opt">&</span>buffer<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret <span class="hl opt">!=</span> GST_FLOW_OK<span class="hl opt">) {</span>
<span class="hl com">/*</span>
<span class="hl com"> * RequestWrap has ownership of the rquest, and we</span>
<span class="hl com"> * won't be queueing this one due to lack of buffers.</span>
<span class="hl com"> */</span>
wrap<span class="hl opt">.</span><span class="hl kwd">release</span><span class="hl opt">();</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
wrap<span class="hl opt">-></span><span class="hl kwd">attachBuffer</span><span class="hl opt">(</span>buffer<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>wrap<span class="hl opt">) {</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">));</span>
<span class="hl kwd">GST_TRACE_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Requesting buffers"</span><span class="hl opt">);</span>
state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">queueRequest</span><span class="hl opt">(</span>wrap<span class="hl opt">-></span>request_<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">());</span>
state<span class="hl opt">-></span>requests_<span class="hl opt">.</span><span class="hl kwd">push</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>wrap<span class="hl opt">));</span>
<span class="hl com">/* The RequestWrap will be deleted in the completion handler. */</span>
<span class="hl opt">}</span>
GstFlowReturn ret <span class="hl opt">=</span> GST_FLOW_OK<span class="hl opt">;</span>
<span class="hl kwd">gst_flow_combiner_reset</span><span class="hl opt">(</span>self<span class="hl opt">-></span>flow_combiner<span class="hl opt">);</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">) {</span>
ret <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_pad_push_pending</span><span class="hl opt">(</span>srcpad<span class="hl opt">);</span>
ret <span class="hl opt">=</span> <span class="hl kwd">gst_flow_combiner_update_pad_flow</span><span class="hl opt">(</span>self<span class="hl opt">-></span>flow_combiner<span class="hl opt">,</span>
srcpad<span class="hl opt">,</span> ret<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl opt">{</span>
<span class="hl com">/*</span>
<span class="hl com"> * Here we need to decide if we want to pause or stop the task. This</span>
<span class="hl com"> * needs to happen in lock step with the callback thread which may want</span>
<span class="hl com"> * to resume the task.</span>
<span class="hl com"> */</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">));</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret <span class="hl opt">!=</span> GST_FLOW_OK<span class="hl opt">) {</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret <span class="hl opt">==</span> GST_FLOW_EOS<span class="hl opt">) {</span>
<span class="hl kwd">g_autoptr</span><span class="hl opt">(</span>GstEvent<span class="hl opt">)</span> eos <span class="hl opt">=</span> <span class="hl kwd">gst_event_new_eos</span><span class="hl opt">();</span>
guint32 seqnum <span class="hl opt">=</span> <span class="hl kwd">gst_util_seqnum_next</span><span class="hl opt">();</span>
<span class="hl kwd">gst_event_set_seqnum</span><span class="hl opt">(</span>eos<span class="hl opt">,</span> seqnum<span class="hl opt">);</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">)</span>
<span class="hl kwd">gst_pad_push_event</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> <span class="hl kwd">gst_event_ref</span><span class="hl opt">(</span>eos<span class="hl opt">));</span>
<span class="hl opt">}</span> <span class="hl kwa">else if</span> <span class="hl opt">(</span>ret <span class="hl opt">!=</span> GST_FLOW_FLUSHING<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_FLOW_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> ret<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<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">bool</span> do_pause <span class="hl opt">=</span> <span class="hl kwa">true</span><span class="hl opt">;</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">) {</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span><span class="hl kwd">gst_libcamera_pad_has_pending</span><span class="hl opt">(</span>srcpad<span class="hl opt">)) {</span>
do_pause <span class="hl opt">=</span> <span class="hl kwa">false</span><span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>do_pause<span class="hl opt">)</span>
<span class="hl kwd">gst_task_pause</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_task_enter</span><span class="hl opt">(</span>GstTask <span class="hl opt">*</span>task<span class="hl opt">, [[</span>maybe_unused<span class="hl opt">]]</span> GThread <span class="hl opt">*</span>thread<span class="hl opt">,</span>
gpointer user_data<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>user_data<span class="hl opt">);</span>
GLibRecLocker <span class="hl kwd">lock</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>stream_lock<span class="hl opt">);</span>
GstLibcameraSrcState <span class="hl opt">*</span>state <span class="hl opt">=</span> self<span class="hl opt">-></span>state<span class="hl opt">;</span>
GstFlowReturn flow_ret <span class="hl opt">=</span> GST_FLOW_OK<span class="hl opt">;</span>
gint ret<span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Streaming thread has started"</span><span class="hl opt">);</span>
guint group_id <span class="hl opt">=</span> <span class="hl kwd">gst_util_group_id_next</span><span class="hl opt">();</span>
gint stream_id_num <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span>
StreamRoles roles<span class="hl opt">;</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">) {</span>
<span class="hl com">/* Create stream-id and push stream-start. */</span>
g_autofree gchar <span class="hl opt">*</span>stream_id_intermediate <span class="hl opt">=</span> <span class="hl kwd">g_strdup_printf</span><span class="hl opt">(</span><span class="hl str">"%i%i"</span><span class="hl opt">,</span> group_id<span class="hl opt">,</span> stream_id_num<span class="hl opt">++);</span>
g_autofree gchar <span class="hl opt">*</span>stream_id <span class="hl opt">=</span> <span class="hl kwd">gst_pad_create_stream_id</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> <span class="hl kwd">GST_ELEMENT</span><span class="hl opt">(</span>self<span class="hl opt">),</span> stream_id_intermediate<span class="hl opt">);</span>
GstEvent <span class="hl opt">*</span>event <span class="hl opt">=</span> <span class="hl kwd">gst_event_new_stream_start</span><span class="hl opt">(</span>stream_id<span class="hl opt">);</span>
<span class="hl kwd">gst_event_set_group_id</span><span class="hl opt">(</span>event<span class="hl opt">,</span> group_id<span class="hl opt">);</span>
<span class="hl kwd">gst_pad_push_event</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> event<span class="hl opt">);</span>
<span class="hl com">/* Collect the streams roles for the next iteration. */</span>
roles<span class="hl opt">.</span><span class="hl kwd">push_back</span><span class="hl opt">(</span><span class="hl kwd">gst_libcamera_pad_get_role</span><span class="hl opt">(</span>srcpad<span class="hl opt">));</span>
<span class="hl opt">}</span>
<span class="hl com">/* Generate the stream configurations, there should be one per pad. */</span>
state<span class="hl opt">-></span>config_ <span class="hl opt">=</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">generateConfiguration</span><span class="hl opt">(</span>roles<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>state<span class="hl opt">-></span>config_ <span class="hl opt">==</span> <span class="hl kwc">nullptr</span><span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> SETTINGS<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed to generate camera configuration from roles"</span><span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"Camera::generateConfiguration() returned nullptr"</span><span class="hl opt">));</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>task<span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwd">g_assert</span><span class="hl opt">(</span>state<span class="hl opt">-></span>config_<span class="hl opt">-></span><span class="hl kwd">size</span><span class="hl opt">() ==</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">size</span><span class="hl opt">());</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>gsize i <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span> i <span class="hl opt"><</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">size</span><span class="hl opt">();</span> i<span class="hl opt">++) {</span>
GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">=</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">[</span>i<span class="hl opt">];</span>
StreamConfiguration <span class="hl opt">&</span>stream_cfg <span class="hl opt">=</span> state<span class="hl opt">-></span>config_<span class="hl opt">-></span><span class="hl kwd">at</span><span class="hl opt">(</span>i<span class="hl opt">);</span>
<span class="hl com">/* Retrieve the supported caps. */</span>
<span class="hl kwd">g_autoptr</span><span class="hl opt">(</span>GstCaps<span class="hl opt">)</span> filter <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_stream_formats_to_caps</span><span class="hl opt">(</span>stream_cfg<span class="hl opt">.</span><span class="hl kwd">formats</span><span class="hl opt">());</span>
<span class="hl kwd">g_autoptr</span><span class="hl opt">(</span>GstCaps<span class="hl opt">)</span> caps <span class="hl opt">=</span> <span class="hl kwd">gst_pad_peer_query_caps</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> filter<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span><span class="hl kwd">gst_caps_is_empty</span><span class="hl opt">(</span>caps<span class="hl opt">)) {</span>
flow_ret <span class="hl opt">=</span> GST_FLOW_NOT_NEGOTIATED<span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/* Fixate caps and configure the stream. */</span>
caps <span class="hl opt">=</span> <span class="hl kwd">gst_caps_make_writable</span><span class="hl opt">(</span>caps<span class="hl opt">);</span>
<span class="hl kwd">gst_libcamera_configure_stream_from_caps</span><span class="hl opt">(</span>stream_cfg<span class="hl opt">,</span> caps<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>flow_ret <span class="hl opt">!=</span> GST_FLOW_OK<span class="hl opt">)</span>
<span class="hl kwa">goto</span> done<span class="hl opt">;</span>
<span class="hl com">/* Validate the configuration. */</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>state<span class="hl opt">-></span>config_<span class="hl opt">-></span><span class="hl kwd">validate</span><span class="hl opt">() ==</span> <span class="hl kwc">CameraConfiguration</span><span class="hl opt">::</span>Invalid<span class="hl opt">) {</span>
flow_ret <span class="hl opt">=</span> GST_FLOW_NOT_NEGOTIATED<span class="hl opt">;</span>
<span class="hl kwa">goto</span> done<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/*</span>
<span class="hl com"> * Regardless if it has been modified, create clean caps and push the</span>
<span class="hl com"> * caps event. Downstream will decide if the caps are acceptable.</span>
<span class="hl com"> */</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>gsize i <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span> i <span class="hl opt"><</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">size</span><span class="hl opt">();</span> i<span class="hl opt">++) {</span>
GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">=</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">[</span>i<span class="hl opt">];</span>
<span class="hl kwb">const</span> StreamConfiguration <span class="hl opt">&</span>stream_cfg <span class="hl opt">=</span> state<span class="hl opt">-></span>config_<span class="hl opt">-></span><span class="hl kwd">at</span><span class="hl opt">(</span>i<span class="hl opt">);</span>
<span class="hl kwd">g_autoptr</span><span class="hl opt">(</span>GstCaps<span class="hl opt">)</span> caps <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_stream_configuration_to_caps</span><span class="hl opt">(</span>stream_cfg<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span><span class="hl kwd">gst_pad_push_event</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> <span class="hl kwd">gst_event_new_caps</span><span class="hl opt">(</span>caps<span class="hl opt">))) {</span>
flow_ret <span class="hl opt">=</span> GST_FLOW_NOT_NEGOTIATED<span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/* Send an open segment event with time format. */</span>
GstSegment segment<span class="hl opt">;</span>
<span class="hl kwd">gst_segment_init</span><span class="hl opt">(&</span>segment<span class="hl opt">,</span> GST_FORMAT_TIME<span class="hl opt">);</span>
<span class="hl kwd">gst_pad_push_event</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> <span class="hl kwd">gst_event_new_segment</span><span class="hl opt">(&</span>segment<span class="hl opt">));</span>
<span class="hl opt">}</span>
ret <span class="hl opt">=</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">configure</span><span class="hl opt">(</span>state<span class="hl opt">-></span>config_<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">());</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> SETTINGS<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed to configure camera: %s"</span><span class="hl opt">,</span> <span class="hl kwd">g_strerror</span><span class="hl opt">(-</span>ret<span class="hl opt">)),</span>
<span class="hl opt">(</span><span class="hl str">"Camera::configure() failed with error code %i"</span><span class="hl opt">,</span> ret<span class="hl opt">));</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>task<span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
self<span class="hl opt">-></span>allocator <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_allocator_new</span><span class="hl opt">(</span>state<span class="hl opt">-></span>cam_<span class="hl opt">,</span> state<span class="hl opt">-></span>config_<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">());</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>self<span class="hl opt">-></span>allocator<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> NO_SPACE_LEFT<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed to allocate memory"</span><span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"gst_libcamera_allocator_new() failed."</span><span class="hl opt">));</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>task<span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
self<span class="hl opt">-></span>flow_combiner <span class="hl opt">=</span> <span class="hl kwd">gst_flow_combiner_new</span><span class="hl opt">();</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>gsize i <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span> i <span class="hl opt"><</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">size</span><span class="hl opt">();</span> i<span class="hl opt">++) {</span>
GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">=</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">[</span>i<span class="hl opt">];</span>
<span class="hl kwb">const</span> StreamConfiguration <span class="hl opt">&</span>stream_cfg <span class="hl opt">=</span> state<span class="hl opt">-></span>config_<span class="hl opt">-></span><span class="hl kwd">at</span><span class="hl opt">(</span>i<span class="hl opt">);</span>
GstLibcameraPool <span class="hl opt">*</span>pool <span class="hl opt">=</span> <span class="hl kwd">gst_libcamera_pool_new</span><span class="hl opt">(</span>self<span class="hl opt">-></span>allocator<span class="hl opt">,</span>
stream_cfg<span class="hl opt">.</span><span class="hl kwd">stream</span><span class="hl opt">());</span>
<span class="hl kwd">g_signal_connect_swapped</span><span class="hl opt">(</span>pool<span class="hl opt">,</span> <span class="hl str">"buffer-notify"</span><span class="hl opt">,</span>
<span class="hl kwd">G_CALLBACK</span><span class="hl opt">(</span>gst_libcamera_resume_task<span class="hl opt">),</span> task<span class="hl opt">);</span>
<span class="hl kwd">gst_libcamera_pad_set_pool</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> pool<span class="hl opt">);</span>
<span class="hl kwd">gst_flow_combiner_add_pad</span><span class="hl opt">(</span>self<span class="hl opt">-></span>flow_combiner<span class="hl opt">,</span> srcpad<span class="hl opt">);</span>
<span class="hl opt">}</span>
ret <span class="hl opt">=</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">start</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> SETTINGS<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Failed to start the camera: %s"</span><span class="hl opt">,</span> <span class="hl kwd">g_strerror</span><span class="hl opt">(-</span>ret<span class="hl opt">)),</span>
<span class="hl opt">(</span><span class="hl str">"Camera.start() failed with error code %i"</span><span class="hl opt">,</span> ret<span class="hl opt">));</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>task<span class="hl opt">);</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
done<span class="hl opt">:</span>
<span class="hl kwa">switch</span> <span class="hl opt">(</span>flow_ret<span class="hl opt">) {</span>
<span class="hl kwa">case</span> GST_FLOW_NOT_NEGOTIATED<span class="hl opt">:</span>
<span class="hl kwd">GST_ELEMENT_FLOW_ERROR</span><span class="hl opt">(</span>self<span class="hl opt">,</span> flow_ret<span class="hl opt">);</span>
<span class="hl kwd">gst_task_stop</span><span class="hl opt">(</span>task<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">default</span><span class="hl opt">:</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_task_leave</span><span class="hl opt">([[</span>maybe_unused<span class="hl opt">]]</span> GstTask <span class="hl opt">*</span>task<span class="hl opt">,</span>
<span class="hl opt">[[</span>maybe_unused<span class="hl opt">]]</span> GThread <span class="hl opt">*</span>thread<span class="hl opt">,</span>
gpointer user_data<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>user_data<span class="hl opt">);</span>
GstLibcameraSrcState <span class="hl opt">*</span>state <span class="hl opt">=</span> self<span class="hl opt">-></span>state<span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Streaming thread is about to stop"</span><span class="hl opt">);</span>
state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">stop</span><span class="hl opt">();</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span>GstPad <span class="hl opt">*</span>srcpad <span class="hl opt">:</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">)</span>
<span class="hl kwd">gst_libcamera_pad_set_pool</span><span class="hl opt">(</span>srcpad<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwd">g_clear_object</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>allocator<span class="hl opt">);</span>
<span class="hl kwd">g_clear_pointer</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>flow_combiner<span class="hl opt">,</span>
<span class="hl opt">(</span>GDestroyNotify<span class="hl opt">)</span>gst_flow_combiner_free<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_close</span><span class="hl opt">(</span>GstLibcameraSrc <span class="hl opt">*</span>self<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrcState <span class="hl opt">*</span>state <span class="hl opt">=</span> self<span class="hl opt">-></span>state<span class="hl opt">;</span>
gint ret<span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Releasing resources"</span><span class="hl opt">);</span>
state<span class="hl opt">-></span>config_<span class="hl opt">.</span><span class="hl kwd">reset</span><span class="hl opt">();</span>
ret <span class="hl opt">=</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">release</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">GST_ELEMENT_WARNING</span><span class="hl opt">(</span>self<span class="hl opt">,</span> RESOURCE<span class="hl opt">,</span> BUSY<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Camera '%s' is still in use."</span><span class="hl opt">,</span> state<span class="hl opt">-></span>cam_<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">()),</span>
<span class="hl opt">(</span><span class="hl str">"libcamera::Camera.release() failed: %s"</span><span class="hl opt">,</span> <span class="hl kwd">g_strerror</span><span class="hl opt">(-</span>ret<span class="hl opt">)));</span>
<span class="hl opt">}</span>
state<span class="hl opt">-></span>cam_<span class="hl opt">.</span><span class="hl kwd">reset</span><span class="hl opt">();</span>
state<span class="hl opt">-></span>cm_<span class="hl opt">-></span><span class="hl kwd">stop</span><span class="hl opt">();</span>
state<span class="hl opt">-></span>cm_<span class="hl opt">.</span><span class="hl kwd">reset</span><span class="hl opt">();</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_set_property</span><span class="hl opt">(</span>GObject <span class="hl opt">*</span>object<span class="hl opt">,</span> guint prop_id<span class="hl opt">,</span>
<span class="hl kwb">const</span> GValue <span class="hl opt">*</span>value<span class="hl opt">,</span> GParamSpec <span class="hl opt">*</span>pspec<span class="hl opt">)</span>
<span class="hl opt">{</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>object<span class="hl opt">));</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
<span class="hl kwa">switch</span> <span class="hl opt">(</span>prop_id<span class="hl opt">) {</span>
<span class="hl kwa">case</span> PROP_CAMERA_NAME<span class="hl opt">:</span>
<span class="hl kwd">g_free</span><span class="hl opt">(</span>self<span class="hl opt">-></span>camera_name<span class="hl opt">);</span>
self<span class="hl opt">-></span>camera_name <span class="hl opt">=</span> <span class="hl kwd">g_value_dup_string</span><span class="hl opt">(</span>value<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">default</span><span class="hl opt">:</span>
<span class="hl kwd">G_OBJECT_WARN_INVALID_PROPERTY_ID</span><span class="hl opt">(</span>object<span class="hl opt">,</span> prop_id<span class="hl opt">,</span> pspec<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_get_property</span><span class="hl opt">(</span>GObject <span class="hl opt">*</span>object<span class="hl opt">,</span> guint prop_id<span class="hl opt">,</span> GValue <span class="hl opt">*</span>value<span class="hl opt">,</span>
GParamSpec <span class="hl opt">*</span>pspec<span class="hl opt">)</span>
<span class="hl opt">{</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>object<span class="hl opt">));</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
<span class="hl kwa">switch</span> <span class="hl opt">(</span>prop_id<span class="hl opt">) {</span>
<span class="hl kwa">case</span> PROP_CAMERA_NAME<span class="hl opt">:</span>
<span class="hl kwd">g_value_set_string</span><span class="hl opt">(</span>value<span class="hl opt">,</span> self<span class="hl opt">-></span>camera_name<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">default</span><span class="hl opt">:</span>
<span class="hl kwd">G_OBJECT_WARN_INVALID_PROPERTY_ID</span><span class="hl opt">(</span>object<span class="hl opt">,</span> prop_id<span class="hl opt">,</span> pspec<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwb">static</span> GstStateChangeReturn
<span class="hl kwd">gst_libcamera_src_change_state</span><span class="hl opt">(</span>GstElement <span class="hl opt">*</span>element<span class="hl opt">,</span> GstStateChange transition<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>element<span class="hl opt">);</span>
GstStateChangeReturn ret <span class="hl opt">=</span> GST_STATE_CHANGE_SUCCESS<span class="hl opt">;</span>
GstElementClass <span class="hl opt">*</span>klass <span class="hl opt">=</span> <span class="hl kwd">GST_ELEMENT_CLASS</span><span class="hl opt">(</span>gst_libcamera_src_parent_class<span class="hl opt">);</span>
ret <span class="hl opt">=</span> klass<span class="hl opt">-></span><span class="hl kwd">change_state</span><span class="hl opt">(</span>element<span class="hl opt">,</span> transition<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret <span class="hl opt">==</span> GST_STATE_CHANGE_FAILURE<span class="hl opt">)</span>
<span class="hl kwa">return</span> ret<span class="hl opt">;</span>
<span class="hl kwa">switch</span> <span class="hl opt">(</span>transition<span class="hl opt">) {</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_NULL_TO_READY<span class="hl opt">:</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span><span class="hl kwd">gst_libcamera_src_open</span><span class="hl opt">(</span>self<span class="hl opt">))</span>
<span class="hl kwa">return</span> GST_STATE_CHANGE_FAILURE<span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_READY_TO_PAUSED<span class="hl opt">:</span>
<span class="hl com">/* This needs to be called after pads activation.*/</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span><span class="hl kwd">gst_task_pause</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">))</span>
<span class="hl kwa">return</span> GST_STATE_CHANGE_FAILURE<span class="hl opt">;</span>
ret <span class="hl opt">=</span> GST_STATE_CHANGE_NO_PREROLL<span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_PAUSED_TO_PLAYING<span class="hl opt">:</span>
<span class="hl kwd">gst_task_start</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_PLAYING_TO_PAUSED<span class="hl opt">:</span>
ret <span class="hl opt">=</span> GST_STATE_CHANGE_NO_PREROLL<span class="hl opt">;</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_PAUSED_TO_READY<span class="hl opt">:</span>
<span class="hl com">/*</span>
<span class="hl com"> * \todo this might require some thread unblocking in the future</span>
<span class="hl com"> * if the streaming thread starts doing any kind of blocking</span>
<span class="hl com"> * operations. If this was the case, we would need to do so</span>
<span class="hl com"> * before pad deactivation, so before chaining to the parent</span>
<span class="hl com"> * change_state function.</span>
<span class="hl com"> */</span>
<span class="hl kwd">gst_task_join</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">case</span> GST_STATE_CHANGE_READY_TO_NULL<span class="hl opt">:</span>
<span class="hl kwd">gst_libcamera_src_close</span><span class="hl opt">(</span>self<span class="hl opt">);</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl kwa">default</span><span class="hl opt">:</span>
<span class="hl kwa">break</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">return</span> ret<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_finalize</span><span class="hl opt">(</span>GObject <span class="hl opt">*</span>object<span class="hl opt">)</span>
<span class="hl opt">{</span>
GObjectClass <span class="hl opt">*</span>klass <span class="hl opt">=</span> <span class="hl kwd">G_OBJECT_CLASS</span><span class="hl opt">(</span>gst_libcamera_src_parent_class<span class="hl opt">);</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
<span class="hl kwd">g_rec_mutex_clear</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>stream_lock<span class="hl opt">);</span>
<span class="hl kwd">g_clear_object</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>task<span class="hl opt">);</span>
<span class="hl kwd">g_free</span><span class="hl opt">(</span>self<span class="hl opt">-></span>camera_name<span class="hl opt">);</span>
<span class="hl kwa">delete</span> self<span class="hl opt">-></span>state<span class="hl opt">;</span>
<span class="hl kwa">return</span> klass<span class="hl opt">-></span><span class="hl kwd">finalize</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_init</span><span class="hl opt">(</span>GstLibcameraSrc <span class="hl opt">*</span>self<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrcState <span class="hl opt">*</span>state <span class="hl opt">=</span> <span class="hl kwa">new</span> <span class="hl kwd">GstLibcameraSrcState</span><span class="hl opt">();</span>
GstPadTemplate <span class="hl opt">*</span>templ <span class="hl opt">=</span> <span class="hl kwd">gst_element_get_pad_template</span><span class="hl opt">(</span><span class="hl kwd">GST_ELEMENT</span><span class="hl opt">(</span>self<span class="hl opt">),</span> <span class="hl str">"src"</span><span class="hl opt">);</span>
<span class="hl kwd">g_rec_mutex_init</span><span class="hl opt">(&</span>self<span class="hl opt">-></span>stream_lock<span class="hl opt">);</span>
self<span class="hl opt">-></span>task <span class="hl opt">=</span> <span class="hl kwd">gst_task_new</span><span class="hl opt">(</span>gst_libcamera_src_task_run<span class="hl opt">,</span> self<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwd">gst_task_set_enter_callback</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">,</span> gst_libcamera_src_task_enter<span class="hl opt">,</span> self<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwd">gst_task_set_leave_callback</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">,</span> gst_libcamera_src_task_leave<span class="hl opt">,</span> self<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwd">gst_task_set_lock</span><span class="hl opt">(</span>self<span class="hl opt">-></span>task<span class="hl opt">, &</span>self<span class="hl opt">-></span>stream_lock<span class="hl opt">);</span>
state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">push_back</span><span class="hl opt">(</span><span class="hl kwd">gst_pad_new_from_template</span><span class="hl opt">(</span>templ<span class="hl opt">,</span> <span class="hl str">"src"</span><span class="hl opt">));</span>
<span class="hl kwd">gst_element_add_pad</span><span class="hl opt">(</span><span class="hl kwd">GST_ELEMENT</span><span class="hl opt">(</span>self<span class="hl opt">),</span> state<span class="hl opt">-></span>srcpads_<span class="hl opt">[</span><span class="hl num">0</span><span class="hl opt">]);</span>
<span class="hl com">/* C-style friend. */</span>
state<span class="hl opt">-></span>src_ <span class="hl opt">=</span> self<span class="hl opt">;</span>
self<span class="hl opt">-></span>state <span class="hl opt">=</span> state<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static</span> GstPad <span class="hl opt">*</span>
<span class="hl kwd">gst_libcamera_src_request_new_pad</span><span class="hl opt">(</span>GstElement <span class="hl opt">*</span>element<span class="hl opt">,</span> GstPadTemplate <span class="hl opt">*</span>templ<span class="hl opt">,</span>
<span class="hl kwb">const</span> gchar <span class="hl opt">*</span>name<span class="hl opt">, [[</span>maybe_unused<span class="hl opt">]]</span> <span class="hl kwb">const</span> GstCaps <span class="hl opt">*</span>caps<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>element<span class="hl opt">);</span>
<span class="hl kwd">g_autoptr</span><span class="hl opt">(</span>GstPad<span class="hl opt">)</span> pad <span class="hl opt">=</span> NULL<span class="hl opt">;</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"new request pad created"</span><span class="hl opt">);</span>
pad <span class="hl opt">=</span> <span class="hl kwd">gst_pad_new_from_template</span><span class="hl opt">(</span>templ<span class="hl opt">,</span> name<span class="hl opt">);</span>
<span class="hl kwd">g_object_ref_sink</span><span class="hl opt">(</span>pad<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span><span class="hl kwd">gst_element_add_pad</span><span class="hl opt">(</span>element<span class="hl opt">,</span> pad<span class="hl opt">)) {</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">));</span>
self<span class="hl opt">-></span>state<span class="hl opt">-></span>srcpads_<span class="hl opt">.</span><span class="hl kwd">push_back</span><span class="hl opt">(</span><span class="hl kwa">reinterpret_cast</span><span class="hl opt"><</span>GstPad <span class="hl opt">*>(</span><span class="hl kwd">g_object_ref</span><span class="hl opt">(</span>pad<span class="hl opt">)));</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
<span class="hl kwd">GST_ELEMENT_ERROR</span><span class="hl opt">(</span>element<span class="hl opt">,</span> STREAM<span class="hl opt">,</span> FAILED<span class="hl opt">,</span>
<span class="hl opt">(</span><span class="hl str">"Internal data stream error."</span><span class="hl opt">),</span>
<span class="hl opt">(</span><span class="hl str">"Could not add pad to element"</span><span class="hl opt">));</span>
<span class="hl kwa">return</span> NULL<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">return reinterpret_cast</span><span class="hl opt"><</span>GstPad <span class="hl opt">*>(</span><span class="hl kwd">g_steal_pointer</span><span class="hl opt">(&</span>pad<span class="hl opt">));</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_release_pad</span><span class="hl opt">(</span>GstElement <span class="hl opt">*</span>element<span class="hl opt">,</span> GstPad <span class="hl opt">*</span>pad<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraSrc <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_SRC</span><span class="hl opt">(</span>element<span class="hl opt">);</span>
<span class="hl kwd">GST_DEBUG_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Pad %"</span> GST_PTR_FORMAT <span class="hl str">" being released"</span><span class="hl opt">,</span> pad<span class="hl opt">);</span>
<span class="hl opt">{</span>
GLibLocker <span class="hl kwd">lock</span><span class="hl opt">(</span><span class="hl kwd">GST_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">));</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>vector<span class="hl opt"><</span>GstPad <span class="hl opt">*> &</span>pads <span class="hl opt">=</span> self<span class="hl opt">-></span>state<span class="hl opt">-></span>srcpads_<span class="hl opt">;</span>
<span class="hl kwc">auto</span> begin_iterator <span class="hl opt">=</span> pads<span class="hl opt">.</span><span class="hl kwd">begin</span><span class="hl opt">();</span>
<span class="hl kwc">auto</span> end_iterator <span class="hl opt">=</span> pads<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">();</span>
<span class="hl kwc">auto</span> pad_iterator <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">find</span><span class="hl opt">(</span>begin_iterator<span class="hl opt">,</span> end_iterator<span class="hl opt">,</span> pad<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>pad_iterator <span class="hl opt">!=</span> end_iterator<span class="hl opt">) {</span>
<span class="hl kwd">g_object_unref</span><span class="hl opt">(*</span>pad_iterator<span class="hl opt">);</span>
pads<span class="hl opt">.</span><span class="hl kwd">erase</span><span class="hl opt">(</span>pad_iterator<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwd">gst_element_remove_pad</span><span class="hl opt">(</span>element<span class="hl opt">,</span> pad<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_src_class_init</span><span class="hl opt">(</span>GstLibcameraSrcClass <span class="hl opt">*</span>klass<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstElementClass <span class="hl opt">*</span>element_class <span class="hl opt">=</span> <span class="hl kwd">GST_ELEMENT_CLASS</span><span class="hl opt">(</span>klass<span class="hl opt">);</span>
GObjectClass <span class="hl opt">*</span>object_class <span class="hl opt">=</span> <span class="hl kwd">G_OBJECT_CLASS</span><span class="hl opt">(</span>klass<span class="hl opt">);</span>
object_class<span class="hl opt">-></span>set_property <span class="hl opt">=</span> gst_libcamera_src_set_property<span class="hl opt">;</span>
object_class<span class="hl opt">-></span>get_property <span class="hl opt">=</span> gst_libcamera_src_get_property<span class="hl opt">;</span>
object_class<span class="hl opt">-></span>finalize <span class="hl opt">=</span> gst_libcamera_src_finalize<span class="hl opt">;</span>
element_class<span class="hl opt">-></span>request_new_pad <span class="hl opt">=</span> gst_libcamera_src_request_new_pad<span class="hl opt">;</span>
element_class<span class="hl opt">-></span>release_pad <span class="hl opt">=</span> gst_libcamera_src_release_pad<span class="hl opt">;</span>
element_class<span class="hl opt">-></span>change_state <span class="hl opt">=</span> gst_libcamera_src_change_state<span class="hl opt">;</span>
<span class="hl kwd">gst_element_class_set_metadata</span><span class="hl opt">(</span>element_class<span class="hl opt">,</span>
<span class="hl str">"libcamera Source"</span><span class="hl opt">,</span> <span class="hl str">"Source/Video"</span><span class="hl opt">,</span>
<span class="hl str">"Linux Camera source using libcamera"</span><span class="hl opt">,</span>
<span class="hl str">"Nicolas Dufresne <nicolas.dufresne@collabora.com"</span><span class="hl opt">);</span>
<span class="hl kwd">gst_element_class_add_static_pad_template_with_gtype</span><span class="hl opt">(</span>element_class<span class="hl opt">,</span>
<span class="hl opt">&</span>src_template<span class="hl opt">,</span>
GST_TYPE_LIBCAMERA_PAD<span class="hl opt">);</span>
<span class="hl kwd">gst_element_class_add_static_pad_template_with_gtype</span><span class="hl opt">(</span>element_class<span class="hl opt">,</span>
<span class="hl opt">&</span>request_src_template<span class="hl opt">,</span>
GST_TYPE_LIBCAMERA_PAD<span class="hl opt">);</span>
GParamSpec <span class="hl opt">*</span>spec <span class="hl opt">=</span> <span class="hl kwd">g_param_spec_string</span><span class="hl opt">(</span><span class="hl str">"camera-name"</span><span class="hl opt">,</span> <span class="hl str">"Camera Name"</span><span class="hl opt">,</span>
<span class="hl str">"Select by name which camera to use."</span><span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">,</span>
<span class="hl opt">(</span>GParamFlags<span class="hl opt">)(</span>GST_PARAM_MUTABLE_READY
<span class="hl opt">|</span> G_PARAM_CONSTRUCT
<span class="hl opt">|</span> G_PARAM_READWRITE
<span class="hl opt">|</span> G_PARAM_STATIC_STRINGS<span class="hl opt">));</span>
<span class="hl kwd">g_object_class_install_property</span><span class="hl opt">(</span>object_class<span class="hl opt">,</span> PROP_CAMERA_NAME<span class="hl opt">,</span> spec<span class="hl opt">);</span>
<span class="hl opt">}</span>
</code></pre></td></tr></table>
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