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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, Collabora Ltd.</span>
<span class="hl com"> * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com></span>
<span class="hl com"> *</span>
<span class="hl com"> * gstlibcameraprovider.c - GStreamer Device Provider</span>
<span class="hl com"> */</span>
<span class="hl ppc">#include</span> <span class="hl pps">"gstlibcameraprovider.h"</span><span class="hl ppc"></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">"gstlibcamerasrc.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>provider_debug<span class="hl opt">);</span>
<span class="hl ppc">#define GST_CAT_DEFAULT provider_debug</span>
<span class="hl com">/**</span>
<span class="hl com"> * \struct _GstLibcameraDevice</span>
<span class="hl com"> * \brief libcamera GstDevice implementation</span>
<span class="hl com"> *</span>
<span class="hl com"> * This object is used by GstLibcameraProvider to abstract a libcamera</span>
<span class="hl com"> * device. It also provides helpers to create and configure the</span>
<span class="hl com"> * libcamerasrc GstElement to be used with this device. The implementation is</span>
<span class="hl com"> * private to the plugin.</span>
<span class="hl com"> */</span>
<span class="hl kwb">enum</span> <span class="hl opt">{</span>
PROP_DEVICE_NAME <span class="hl opt">=</span> <span class="hl num">1</span><span class="hl opt">,</span>
<span class="hl opt">};</span>
<span class="hl ppc">#define GST_TYPE_LIBCAMERA_DEVICE gst_libcamera_device_get_type()</span>
<span class="hl kwd">G_DECLARE_FINAL_TYPE</span><span class="hl opt">(</span>GstLibcameraDevice<span class="hl opt">,</span> gst_libcamera_device<span class="hl opt">,</span>
GST_LIBCAMERA<span class="hl opt">,</span> DEVICE<span class="hl opt">,</span> GstDevice<span class="hl opt">);</span>
<span class="hl kwb">struct</span> _GstLibcameraDevice <span class="hl opt">{</span>
GstDevice parent<span class="hl opt">;</span>
gchar <span class="hl opt">*</span>name<span class="hl opt">;</span>
<span class="hl opt">};</span>
<span class="hl kwd">G_DEFINE_TYPE</span><span class="hl opt">(</span>GstLibcameraDevice<span class="hl opt">,</span> gst_libcamera_device<span class="hl opt">,</span> GST_TYPE_DEVICE<span class="hl opt">);</span>
<span class="hl kwb">static</span> GstElement <span class="hl opt">*</span>
<span class="hl kwd">gst_libcamera_device_create_element</span><span class="hl opt">(</span>GstDevice <span class="hl opt">*</span>device<span class="hl opt">,</span> <span class="hl kwb">const</span> gchar <span class="hl opt">*</span>name<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstElement <span class="hl opt">*</span>source <span class="hl opt">=</span> <span class="hl kwd">gst_element_factory_make</span><span class="hl opt">(</span><span class="hl str">"libcamerasrc"</span><span class="hl opt">,</span> name<span class="hl opt">);</span>
<span class="hl com">/*</span>
<span class="hl com"> * Provider and source lives in the same plugin, so making the source</span>
<span class="hl com"> * should never fail.</span>
<span class="hl com"> */</span>
<span class="hl kwd">g_assert</span><span class="hl opt">(</span>source<span class="hl opt">);</span>
<span class="hl kwd">g_object_set</span><span class="hl opt">(</span>source<span class="hl opt">,</span> <span class="hl str">"camera-name"</span><span class="hl opt">,</span> <span class="hl kwd">GST_LIBCAMERA_DEVICE</span><span class="hl opt">(</span>device<span class="hl opt">)-></span>name<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwa">return</span> source<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static</span> gboolean
<span class="hl kwd">gst_libcamera_device_reconfigure_element</span><span class="hl opt">(</span>GstDevice <span class="hl opt">*</span>device<span class="hl opt">,</span>
GstElement <span class="hl opt">*</span>element<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span><span class="hl kwd">GST_LIBCAMERA_IS_SRC</span><span class="hl opt">(</span>element<span class="hl opt">))</span>
<span class="hl kwa">return</span> FALSE<span class="hl opt">;</span>
<span class="hl kwd">g_object_set</span><span class="hl opt">(</span>element<span class="hl opt">,</span> <span class="hl str">"camera-name"</span><span class="hl opt">,</span> <span class="hl kwd">GST_LIBCAMERA_DEVICE</span><span class="hl opt">(</span>device<span class="hl opt">)-></span>name<span class="hl opt">,</span> <span class="hl kwc">nullptr</span><span class="hl opt">);</span>
<span class="hl kwa">return</span> TRUE<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_device_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>
GstLibcameraDevice <span class="hl opt">*</span>device <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_DEVICE</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_DEVICE_NAME<span class="hl opt">:</span>
device<span class="hl opt">-></span>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_device_init</span><span class="hl opt">(</span>GstLibcameraDevice <span class="hl opt">*</span>self<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_device_finalize</span><span class="hl opt">(</span>GObject <span class="hl opt">*</span>object<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraDevice <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_DEVICE</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
gpointer klass <span class="hl opt">=</span> gst_libcamera_device_parent_class<span class="hl opt">;</span>
<span class="hl kwd">g_free</span><span class="hl opt">(</span>self<span class="hl opt">-></span>name<span class="hl opt">);</span>
<span class="hl kwd">G_OBJECT_GET_CLASS</span><span class="hl opt">(</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_device_class_init</span><span class="hl opt">(</span>GstLibcameraDeviceClass <span class="hl opt">*</span>klass<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstDeviceClass <span class="hl opt">*</span>device_class <span class="hl opt">=</span> <span class="hl kwd">GST_DEVICE_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>
device_class<span class="hl opt">-></span>create_element <span class="hl opt">=</span> gst_libcamera_device_create_element<span class="hl opt">;</span>
device_class<span class="hl opt">-></span>reconfigure_element <span class="hl opt">=</span> gst_libcamera_device_reconfigure_element<span class="hl opt">;</span>
object_class<span class="hl opt">-></span>set_property <span class="hl opt">=</span> gst_libcamera_device_set_property<span class="hl opt">;</span>
object_class<span class="hl opt">-></span>finalize <span class="hl opt">=</span> gst_libcamera_device_finalize<span class="hl opt">;</span>
GParamSpec <span class="hl opt">*</span>pspec <span class="hl opt">=</span> <span class="hl kwd">g_param_spec_string</span><span class="hl opt">(</span><span class="hl str">"name"</span><span class="hl opt">,</span> <span class="hl str">"Name"</span><span class="hl opt">,</span>
<span class="hl str">"The name of the camera device"</span><span class="hl opt">,</span> <span class="hl str">""</span><span class="hl opt">,</span>
<span class="hl opt">(</span>GParamFlags<span class="hl opt">)(</span>G_PARAM_STATIC_STRINGS <span class="hl opt">|</span> G_PARAM_WRITABLE <span class="hl opt">|</span>
G_PARAM_CONSTRUCT_ONLY<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_DEVICE_NAME<span class="hl opt">,</span> pspec<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static</span> GstDevice <span class="hl opt">*</span>
<span class="hl kwd">gst_libcamera_device_new</span><span class="hl opt">(</span><span class="hl kwb">const</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>camera<span class="hl opt">)</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_caps_new_empty</span><span class="hl opt">();</span>
<span class="hl kwb">const</span> gchar <span class="hl opt">*</span>name <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">name</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">();</span>
StreamRoles roles<span class="hl opt">;</span>
roles<span class="hl opt">.</span><span class="hl kwd">push_back</span><span class="hl opt">(</span><span class="hl kwc">StreamRole</span><span class="hl opt">::</span>VideoRecording<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> camera<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">for</span> <span class="hl opt">(</span><span class="hl kwb">const</span> StreamConfiguration <span class="hl opt">&</span>stream_cfg <span class="hl opt">: *</span>config<span class="hl opt">) {</span>
GstCaps <span class="hl opt">*</span>sub_caps <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 kwa">if</span> <span class="hl opt">(</span>sub_caps<span class="hl opt">)</span>
<span class="hl kwd">gst_caps_append</span><span class="hl opt">(</span>caps<span class="hl opt">,</span> sub_caps<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwa">return</span> <span class="hl kwd">GST_DEVICE</span><span class="hl opt">(</span><span class="hl kwd">g_object_new</span><span class="hl opt">(</span>GST_TYPE_LIBCAMERA_DEVICE<span class="hl opt">,</span>
<span class="hl com">/* \todo Use a unique identifier instead of camera name. */</span>
<span class="hl str">"name"</span><span class="hl opt">,</span> name<span class="hl opt">,</span>
<span class="hl str">"display-name"</span><span class="hl opt">,</span> name<span class="hl opt">,</span>
<span class="hl str">"caps"</span><span class="hl opt">,</span> caps<span class="hl opt">,</span>
<span class="hl str">"device-class"</span><span class="hl opt">,</span> <span class="hl str">"Source/Video"</span><span class="hl opt">,</span>
<span class="hl kwc">nullptr</span><span class="hl opt">));</span>
<span class="hl opt">}</span>
<span class="hl com">/**</span>
<span class="hl com"> * \struct _GstLibcameraProvider</span>
<span class="hl com"> * \brief libcamera GstDeviceProvider implementation</span>
<span class="hl com"> *</span>
<span class="hl com"> * This GstFeature is used by GstDeviceMonitor to probe the available</span>
<span class="hl com"> * libcamera devices. The implementation is private to the plugin.</span>
<span class="hl com"> */</span>
<span class="hl kwb">struct</span> _GstLibcameraProvider <span class="hl opt">{</span>
GstDeviceProvider parent<span class="hl opt">;</span>
CameraManager <span class="hl opt">*</span>cm<span class="hl opt">;</span>
<span class="hl opt">};</span>
<span class="hl kwd">G_DEFINE_TYPE_WITH_CODE</span><span class="hl opt">(</span>GstLibcameraProvider<span class="hl opt">,</span> gst_libcamera_provider<span class="hl opt">,</span>
GST_TYPE_DEVICE_PROVIDER<span class="hl opt">,</span>
<span class="hl kwd">GST_DEBUG_CATEGORY_INIT</span><span class="hl opt">(</span>provider_debug<span class="hl opt">,</span> <span class="hl str">"libcamera-provider"</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span>
<span class="hl str">"libcamera Device Provider"</span><span class="hl opt">));</span>
<span class="hl kwb">static</span> GList <span class="hl opt">*</span>
<span class="hl kwd">gst_libcamera_provider_probe</span><span class="hl opt">(</span>GstDeviceProvider <span class="hl opt">*</span>provider<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraProvider <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_PROVIDER</span><span class="hl opt">(</span>provider<span class="hl opt">);</span>
CameraManager <span class="hl opt">*</span>cm <span class="hl opt">=</span> self<span class="hl opt">-></span>cm<span class="hl opt">;</span>
GList <span class="hl opt">*</span>devices <span class="hl opt">=</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
gint ret<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">"Probing cameras using libcamera"</span><span class="hl opt">);</span>
<span class="hl com">/* \todo Move the CameraMananger start()/stop() calls into</span>
<span class="hl com"> * GstDeviceProvider start()/stop() virtual function when CameraMananger</span>
<span class="hl com"> * gains monitoring support. Meanwhile we need to cycle start()/stop()</span>
<span class="hl com"> * to ensure every probe() calls return the latest list.</span>
<span class="hl com"> */</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_ERROR_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Failed to retrieve device list: %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</span> <span class="hl kwc">nullptr</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 kwb">const</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>camera <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">GST_INFO_OBJECT</span><span class="hl opt">(</span>self<span class="hl opt">,</span> <span class="hl str">"Found camera '%s'"</span><span class="hl opt">,</span> camera<span class="hl opt">-></span><span class="hl kwd">name</span><span class="hl opt">().</span><span class="hl kwd">c_str</span><span class="hl opt">());</span>
devices <span class="hl opt">=</span> <span class="hl kwd">g_list_append</span><span class="hl opt">(</span>devices<span class="hl opt">,</span>
<span class="hl kwd">g_object_ref_sink</span><span class="hl opt">(</span><span class="hl kwd">gst_libcamera_device_new</span><span class="hl opt">(</span>camera<span class="hl opt">)));</span>
<span class="hl opt">}</span>
cm<span class="hl opt">-></span><span class="hl kwd">stop</span><span class="hl opt">();</span>
<span class="hl kwa">return</span> devices<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_provider_init</span><span class="hl opt">(</span>GstLibcameraProvider <span class="hl opt">*</span>self<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstDeviceProvider <span class="hl opt">*</span>provider <span class="hl opt">=</span> <span class="hl kwd">GST_DEVICE_PROVIDER</span><span class="hl opt">(</span>self<span class="hl opt">);</span>
self<span class="hl opt">-></span>cm <span class="hl opt">=</span> <span class="hl kwa">new</span> <span class="hl kwd">CameraManager</span><span class="hl opt">();</span>
<span class="hl com">/* Avoid devices being duplicated. */</span>
<span class="hl kwd">gst_device_provider_hide_provider</span><span class="hl opt">(</span>provider<span class="hl opt">,</span> <span class="hl str">"v4l2deviceprovider"</span><span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl kwb">static void</span>
<span class="hl kwd">gst_libcamera_provider_finalize</span><span class="hl opt">(</span>GObject <span class="hl opt">*</span>object<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstLibcameraProvider <span class="hl opt">*</span>self <span class="hl opt">=</span> <span class="hl kwd">GST_LIBCAMERA_PROVIDER</span><span class="hl opt">(</span>object<span class="hl opt">);</span>
gpointer klass <span class="hl opt">=</span> gst_libcamera_provider_parent_class<span class="hl opt">;</span>
<span class="hl kwa">delete</span> self<span class="hl opt">-></span>cm<span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl kwd">G_OBJECT_GET_CLASS</span><span class="hl opt">(</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_provider_class_init</span><span class="hl opt">(</span>GstLibcameraProviderClass <span class="hl opt">*</span>klass<span class="hl opt">)</span>
<span class="hl opt">{</span>
GstDeviceProviderClass <span class="hl opt">*</span>provider_class <span class="hl opt">=</span> <span class="hl kwd">GST_DEVICE_PROVIDER_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>
provider_class<span class="hl opt">-></span>probe <span class="hl opt">=</span> gst_libcamera_provider_probe<span class="hl opt">;</span>
object_class<span class="hl opt">-></span>finalize <span class="hl opt">=</span> gst_libcamera_provider_finalize<span class="hl opt">;</span>
<span class="hl kwd">gst_device_provider_class_set_metadata</span><span class="hl opt">(</span>provider_class<span class="hl opt">,</span>
<span class="hl str">"libcamera Device Provider"</span><span class="hl opt">,</span>
<span class="hl str">"Source/Video"</span><span class="hl opt">,</span>
<span class="hl str">"List camera device 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 opt">}</span>
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