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authorNicolas Dufresne <nicolas.dufresne@collabora.com>2020-01-14 13:37:57 -0500
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-03-07 01:57:45 +0200
commit71a28f959313c573097fa23d5894b0104f092352 (patch)
tree9f63836911be6603d3958587da31dd185508a247 /src
parent7e82d3c2a1ecca4f2041a1a095a0725fe9d172c0 (diff)
gst: Add pads to the source
This simply adds the boiler plate for pads on the source element. The design is that we have one pad, called "src", that will always be present, and then more pads can be requested prior in READY or less state. Initially pads have one property "stream-role" that let you decide which role this pad will have. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src')
-rw-r--r--src/gstreamer/gstlibcamerapad.cpp102
-rw-r--r--src/gstreamer/gstlibcamerapad.h19
-rw-r--r--src/gstreamer/gstlibcamerasrc.cpp20
-rw-r--r--src/gstreamer/meson.build1
4 files changed, 142 insertions, 0 deletions
diff --git a/src/gstreamer/gstlibcamerapad.cpp b/src/gstreamer/gstlibcamerapad.cpp
new file mode 100644
index 00000000..ca5c8203
--- /dev/null
+++ b/src/gstreamer/gstlibcamerapad.cpp
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Collabora Ltd.
+ * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
+ *
+ * gstlibcamerapad.cpp - GStreamer Capture Pad
+ */
+
+#include "gstlibcamerapad.h"
+
+#include <libcamera/stream.h>
+
+#include "gstlibcamera-utils.h"
+
+using namespace libcamera;
+
+struct _GstLibcameraPad {
+ GstPad parent;
+ StreamRole role;
+};
+
+enum {
+ PROP_0,
+ PROP_STREAM_ROLE
+};
+
+G_DEFINE_TYPE(GstLibcameraPad, gst_libcamera_pad, GST_TYPE_PAD);
+
+static void
+gst_libcamera_pad_set_property(GObject *object, guint prop_id,
+ const GValue *value, GParamSpec *pspec)
+{
+ auto *self = GST_LIBCAMERA_PAD(object);
+ GLibLocker lock(GST_OBJECT(self));
+
+ switch (prop_id) {
+ case PROP_STREAM_ROLE:
+ self->role = (StreamRole)g_value_get_enum(value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_libcamera_pad_get_property(GObject *object, guint prop_id, GValue *value,
+ GParamSpec *pspec)
+{
+ auto *self = GST_LIBCAMERA_PAD(object);
+ GLibLocker lock(GST_OBJECT(self));
+
+ switch (prop_id) {
+ case PROP_STREAM_ROLE:
+ g_value_set_enum(value, self->role);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_libcamera_pad_init(GstLibcameraPad *self)
+{
+}
+
+static GType
+gst_libcamera_stream_role_get_type(void)
+{
+ static GType type = 0;
+ static const GEnumValue values[] = {
+ { StillCapture, "libcamera::StillCapture", "still-capture" },
+ { VideoRecording, "libcamera::VideoRecording", "video-recording" },
+ { Viewfinder, "libcamera::Viewfinder", "view-finder" },
+ { 0, NULL, NULL }
+ };
+
+ if (!type)
+ type = g_enum_register_static("GstLibcameraStreamRole", values);
+
+ return type;
+}
+
+static void
+gst_libcamera_pad_class_init(GstLibcameraPadClass *klass)
+{
+ auto *object_class = G_OBJECT_CLASS(klass);
+
+ object_class->set_property = gst_libcamera_pad_set_property;
+ object_class->get_property = gst_libcamera_pad_get_property;
+
+ auto *spec = g_param_spec_enum("stream-role", "Stream Role",
+ "The selected stream role",
+ gst_libcamera_stream_role_get_type(),
+ VideoRecording,
+ (GParamFlags)(GST_PARAM_MUTABLE_READY
+ | G_PARAM_CONSTRUCT
+ | G_PARAM_READWRITE
+ | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property(object_class, PROP_STREAM_ROLE, spec);
+}
diff --git a/src/gstreamer/gstlibcamerapad.h b/src/gstreamer/gstlibcamerapad.h
new file mode 100644
index 00000000..2e745f12
--- /dev/null
+++ b/src/gstreamer/gstlibcamerapad.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Collabora Ltd.
+ * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
+ *
+ * gstlibcamerapad.h - GStreamer Capture Element
+ */
+
+#include <gst/gst.h>
+
+#ifndef __GST_LIBCAMERA_PAD_H__
+#define __GST_LIBCAMERA_PAD_H__
+
+#define GST_TYPE_LIBCAMERA_PAD gst_libcamera_pad_get_type()
+G_DECLARE_FINAL_TYPE(GstLibcameraPad, gst_libcamera_pad,
+ GST_LIBCAMERA, PAD, GstPad)
+
+
+#endif /* __GST_LIBCAMERA_PAD_H__ */
diff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp
index 38075032..79d4196c 100644
--- a/src/gstreamer/gstlibcamerasrc.cpp
+++ b/src/gstreamer/gstlibcamerasrc.cpp
@@ -8,12 +8,26 @@
#include "gstlibcamerasrc.h"
+#include "gstlibcamerapad.h"
+
struct _GstLibcameraSrc {
GstElement parent;
};
G_DEFINE_TYPE(GstLibcameraSrc, gst_libcamera_src, GST_TYPE_ELEMENT);
+#define TEMPLATE_CAPS GST_STATIC_CAPS("video/x-raw; image/jpeg")
+
+/* For the simple case, we have a src pad that is always present. */
+GstStaticPadTemplate src_template = {
+ "src", GST_PAD_SRC, GST_PAD_ALWAYS, TEMPLATE_CAPS
+};
+
+/* More pads can be requested in state < PAUSED */
+GstStaticPadTemplate request_src_template = {
+ "src_%s", GST_PAD_SRC, GST_PAD_REQUEST, TEMPLATE_CAPS
+};
+
static void
gst_libcamera_src_init(GstLibcameraSrc *self)
{
@@ -28,4 +42,10 @@ gst_libcamera_src_class_init(GstLibcameraSrcClass *klass)
"libcamera Source", "Source/Video",
"Linux Camera source using libcamera",
"Nicolas Dufresne <nicolas.dufresne@collabora.com");
+ gst_element_class_add_static_pad_template_with_gtype(element_class,
+ &src_template,
+ GST_TYPE_LIBCAMERA_PAD);
+ gst_element_class_add_static_pad_template_with_gtype(element_class,
+ &request_src_template,
+ GST_TYPE_LIBCAMERA_PAD);
}
diff --git a/src/gstreamer/meson.build b/src/gstreamer/meson.build
index 7e26e3e1..5324b2f5 100644
--- a/src/gstreamer/meson.build
+++ b/src/gstreamer/meson.build
@@ -1,6 +1,7 @@
libcamera_gst_sources = [
'gstlibcamera-utils.cpp',
'gstlibcamera.c',
+ 'gstlibcamerapad.cpp',
'gstlibcameraprovider.cpp',
'gstlibcamerasrc.cpp',
]