1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* gstlibcameraprovider.c - GStreamer Device Provider
*/
#include "gstlibcameraprovider.h"
#include <libcamera/camera.h>
#include <libcamera/camera_manager.h>
#include "gstlibcamerasrc.h"
#include "gstlibcamera-utils.h"
using namespace libcamera;
GST_DEBUG_CATEGORY_STATIC(provider_debug);
#define GST_CAT_DEFAULT provider_debug
/**
* \struct _GstLibcameraDevice
* \brief libcamera GstDevice implementation
*
* This object is used by GstLibcameraProvider to abstract a libcamera
* device. It also provides helpers to create and configure the
* libcamerasrc GstElement to be used with this device. The implementation is
* private to the plugin.
*/
enum {
PROP_DEVICE_NAME = 1,
};
#define GST_TYPE_LIBCAMERA_DEVICE gst_libcamera_device_get_type()
G_DECLARE_FINAL_TYPE(GstLibcameraDevice, gst_libcamera_device,
GST_LIBCAMERA, DEVICE, GstDevice)
struct _GstLibcameraDevice {
GstDevice parent;
gchar *name;
};
G_DEFINE_TYPE(GstLibcameraDevice, gst_libcamera_device, GST_TYPE_DEVICE)
static GstElement *
gst_libcamera_device_create_element(GstDevice *device, const gchar *name)
{
GstElement *source = gst_element_factory_make("libcamerasrc", name);
/*
* Provider and source lives in the same plugin, so making the source
* should never fail.
*/
g_assert(source);
g_object_set(source, "camera-name", GST_LIBCAMERA_DEVICE(device)->name, nullptr);
return source;
}
static gboolean
gst_libcamera_device_reconfigure_element(GstDevice *device,
GstElement *element)
{
if (!GST_LIBCAMERA_IS_SRC(element))
return FALSE;
g_object_set(element, "camera-name", GST_LIBCAMERA_DEVICE(device)->name, nullptr);
return TRUE;
}
static void
gst_libcamera_device_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstLibcameraDevice *device = GST_LIBCAMERA_DEVICE(object);
switch (prop_id) {
case PROP_DEVICE_NAME:
device->name = g_value_dup_string(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_libcamera_device_init([[maybe_unused]] GstLibcameraDevice *self)
{
}
static void
gst_libcamera_device_finalize(GObject *object)
{
GstLibcameraDevice *self = GST_LIBCAMERA_DEVICE(object);
gpointer klass = gst_libcamera_device_parent_class;
g_free(self->name);
G_OBJECT_CLASS(klass)->finalize(object);
}
static void
gst_libcamera_device_class_init(GstLibcameraDeviceClass *klass)
{
GstDeviceClass *device_class = GST_DEVICE_CLASS(klass);
GObjectClass *object_class = G_OBJECT_CLASS(klass);
device_class->create_element = gst_libcamera_device_create_element;
device_class->reconfigure_element = gst_libcamera_device_reconfigure_element;
object_class->set_property = gst_libcamera_device_set_property;
object_class->finalize = gst_libcamera_device_finalize;
GParamSpec *pspec = g_param_spec_string("name", "Name",
"The name of the camera device", "",
(GParamFlags)(G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property(object_class, PROP_DEVICE_NAME, pspec);
}
static GstDevice *
gst_libcamera_device_new(const std::shared_ptr<Camera> &camera)
{
g_autoptr(GstCaps) caps = gst_caps_new_empty();
const gchar *name = camera->id().c_str();
StreamRoles roles;
roles.push_back(StreamRole::VideoRecording);
std::unique_ptr<CameraConfiguration> config = camera->generateConfiguration(roles);
for (const StreamConfiguration &stream_cfg : *config) {
GstCaps *sub_caps = gst_libcamera_stream_formats_to_caps(stream_cfg.formats());
if (sub_caps)
gst_caps_append(caps, sub_caps);
}
return GST_DEVICE(g_object_new(GST_TYPE_LIBCAMERA_DEVICE,
/* \todo Use a unique identifier instead of camera name. */
"name", name,
"display-name", name,
"caps", caps,
"device-class", "Source/Video",
nullptr));
}
/**
* \struct _GstLibcameraProvider
* \brief libcamera GstDeviceProvider implementation
*
* This GstFeature is used by GstDeviceMonitor to probe the available
* libcamera devices. The implementation is private to the plugin.
*/
struct _GstLibcameraProvider {
GstDeviceProvider parent;
};
G_DEFINE_TYPE_WITH_CODE(GstLibcameraProvider, gst_libcamera_provider,
GST_TYPE_DEVICE_PROVIDER,
GST_DEBUG_CATEGORY_INIT(provider_debug, "libcamera-provider", 0,
"libcamera Device Provider"))
static GList *
gst_libcamera_provider_probe(GstDeviceProvider *provider)
{
GstLibcameraProvider *self = GST_LIBCAMERA_PROVIDER(provider);
std::shared_ptr<CameraManager> cm;
GList *devices = nullptr;
gint ret;
GST_INFO_OBJECT(self, "Probing cameras using libcamera");
/* \todo Move the CameraMananger start()/stop() calls into
* GstDeviceProvider start()/stop() virtual function when CameraMananger
* gains monitoring support. Meanwhile we need to cycle start()/stop()
* to ensure every probe() calls return the latest list.
*/
cm = gst_libcamera_get_camera_mananger(ret);
if (ret) {
GST_ERROR_OBJECT(self, "Failed to retrieve device list: %s",
g_strerror(-ret));
return nullptr;
}
for (const std::shared_ptr<Camera> &camera : cm->cameras()) {
GST_INFO_OBJECT(self, "Found camera '%s'", camera->id().c_str());
devices = g_list_append(devices,
g_object_ref_sink(gst_libcamera_device_new(camera)));
}
return devices;
}
static void
gst_libcamera_provider_init(GstLibcameraProvider *self)
{
GstDeviceProvider *provider = GST_DEVICE_PROVIDER(self);
/* Avoid devices being duplicated. */
gst_device_provider_hide_provider(provider, "v4l2deviceprovider");
}
static void
gst_libcamera_provider_class_init(GstLibcameraProviderClass *klass)
{
GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS(klass);
provider_class->probe = gst_libcamera_provider_probe;
gst_device_provider_class_set_metadata(provider_class,
"libcamera Device Provider",
"Source/Video",
"List camera device using libcamera",
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
}
|
