Commit ee108d0e authored by Thibault Saunier's avatar Thibault Saunier Committed by Thibault Saunier

uvch264: Implement device provider

parent 2d3de7af
Pipeline #42863 passed with stages
in 33 minutes and 23 seconds
......@@ -29,6 +29,9 @@
#include "gstuvch264_mjpgdemux.h"
#include "gstuvch264_src.h"
extern GType gst_uvc_h264_device_provider_get_type ();
static gboolean
plugin_init (GstPlugin * plugin)
{
......@@ -40,6 +43,10 @@ plugin_init (GstPlugin * plugin)
GST_TYPE_UVC_H264_SRC))
return FALSE;
if (!gst_device_provider_register (plugin, "uvch264deviceprovider",
GST_RANK_PRIMARY, gst_uvc_h264_device_provider_get_type ()))
return FALSE;
return TRUE;
}
......
/* GStreamer
* Copyright (C) 2019 Thibault Saunier <tsaunier@igalia.com>
*
* gstuvc_h264deviceprovider.c: UvcH264 device probing and monitoring
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:provider-uvch264deviceprovider
*
* Device provider for uvch264 devices, it basically contains
* the same informations as the v4l2 device provider but on top
* set the following properties:
*
* ```
* device.api=uvch264
* device.is-camerasrc=TRUE
* ```
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "uvc_h264.h"
#include <gst/gst.h>
enum
{
PROP_DEVICE_PATH = 1,
};
/* *INDENT-OFF* */
G_DECLARE_FINAL_TYPE (GstUvcH264Device, gst_uvc_h264_device, GST_,
UVC_H264_DEVICE, GstDevice)
struct _GstUvcH264Device
{
GstDevice parent;
gchar *device_path;
};
G_DEFINE_TYPE (GstUvcH264Device, gst_uvc_h264_device, GST_TYPE_DEVICE);
/* *INDENT-ON* */
static void
gst_uvc_h264_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstUvcH264Device *self = (GstUvcH264Device *) object;
switch (prop_id) {
case PROP_DEVICE_PATH:
g_value_set_string (value, self->device_path);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElement *
gst_uvc_h264_device_create_element (GstDevice * device, const gchar * name)
{
GstUvcH264Device *self = (GstUvcH264Device *) device;
GstElement *elem;
elem = gst_element_factory_make ("uvch264src", name);
g_object_set (elem, "device", self->device_path, NULL);
return elem;
}
static void
gst_uvc_h264_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstUvcH264Device *self = (GstUvcH264Device *) object;
switch (prop_id) {
case PROP_DEVICE_PATH:
self->device_path = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_uvc_h264_device_finalize (GObject * object)
{
GstUvcH264Device *self = (GstUvcH264Device *) object;
g_free (self->device_path);
G_OBJECT_CLASS (gst_uvc_h264_device_parent_class)->finalize (object);
}
static void
gst_uvc_h264_device_class_init (GstUvcH264DeviceClass * klass)
{
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
dev_class->create_element = gst_uvc_h264_device_create_element;
object_class->get_property = gst_uvc_h264_device_get_property;
object_class->set_property = gst_uvc_h264_device_set_property;
object_class->finalize = gst_uvc_h264_device_finalize;
g_object_class_install_property (object_class, PROP_DEVICE_PATH,
g_param_spec_string ("device-path", "Device Path",
"The Path of the device node", "",
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
gst_uvc_h264_device_init (GstUvcH264Device * device)
{
}
/* *INDENT-OFF* */
G_DECLARE_FINAL_TYPE (GstUvcH264DeviceProvider, gst_uvc_h264_device_provider, GST, UVC_H264_DEVICE_PROVIDER, GstDeviceProvider)
struct _GstUvcH264DeviceProvider
{
GstDeviceProvider parent;
GstDeviceProvider *v4l2;
guint bus_watch_id;
libusb_context *usb_ctx;
};
G_DEFINE_TYPE (GstUvcH264DeviceProvider, gst_uvc_h264_device_provider,
GST_TYPE_DEVICE_PROVIDER);
/* *INDENT-ON* */
static GstDevice *
create_device (GstUvcH264DeviceProvider * self, GstDevice * v4l2dev)
{
GstDevice *dev = NULL;
GstStructure *props = gst_device_get_properties (v4l2dev);
const gchar *devname = gst_structure_get_string (props, "device.path");
gchar *tmp, *device_name = NULL;
GstCaps *caps;
if (!xu_get_id (GST_OBJECT (self), devname, &self->usb_ctx)) {
GST_INFO_OBJECT (self, "%s is not a uvch264 device", devname);
goto done;
}
gst_structure_set (props, "device.api", G_TYPE_STRING, "uvch264",
"device.is-camerasrc", G_TYPE_BOOLEAN, TRUE, NULL);
caps = gst_device_get_caps (v4l2dev);
tmp = gst_device_get_display_name (v4l2dev);
device_name = g_strdup_printf ("UvcH264 %s", tmp);
g_free (tmp);
dev = g_object_new (gst_uvc_h264_device_get_type (), "device-path", devname,
"display-name", device_name, "caps", caps, "device-class",
"Video/CameraSource", "properties", props, NULL);
if (caps)
gst_caps_unref (caps);
done:
g_free (device_name);
gst_structure_free (props);
return dev;
}
static GList *
gst_uvc_h264_device_provider_probe (GstDeviceProvider * provider)
{
GList *tmp, *v4l2devs, *devs = NULL;
GstUvcH264DeviceProvider *self = (GstUvcH264DeviceProvider *) provider;
if (!self->v4l2)
self->v4l2 = gst_device_provider_factory_get_by_name ("v4l2deviceprovider");
if (!self->v4l2)
return NULL;
v4l2devs = gst_device_provider_get_devices (self->v4l2);
for (tmp = v4l2devs; tmp; tmp = tmp->next) {
GstDevice *dev = create_device (self, tmp->data);
if (dev)
devs = g_list_prepend (devs, dev);
}
g_list_free_full (v4l2devs, gst_object_unref);
return devs;
}
static void
_bus_message_cb (GstBus * bus, GstMessage * msg,
GstUvcH264DeviceProvider * self)
{
GstDevice *v4l2dev;
GstDeviceProvider *provider = (GstDeviceProvider *) self;
if (GST_MESSAGE_SRC (msg) != GST_OBJECT (self->v4l2))
return;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_DEVICE_ADDED:
{
GstDevice *dev;
gst_message_parse_device_added (msg, &v4l2dev);
if ((dev = create_device (self, v4l2dev)))
gst_device_provider_device_add (provider, dev);
break;
}
case GST_MESSAGE_DEVICE_REMOVED:
{
GList *item;
gchar *v4l2path;
GstDevice *dev = NULL;
gst_message_parse_device_removed (msg, &v4l2dev);
g_object_get (v4l2dev, "device-path", &v4l2path, NULL);
GST_OBJECT_LOCK (self);
for (item = provider->devices; item; item = item->next) {
if (!g_strcmp0 (((GstUvcH264Device *) item->data)->device_path,
v4l2path)) {
dev = item->data;
break;
}
}
GST_OBJECT_UNLOCK (self);
if (dev)
gst_device_provider_device_remove (provider, dev);
break;
}
default:
break;
}
}
static gboolean
gst_uvc_h264_device_provider_start (GstDeviceProvider * provider)
{
GstBus *bus;
GstUvcH264DeviceProvider *self = (GstUvcH264DeviceProvider *) provider;
GList *tmp, *devs = gst_uvc_h264_device_provider_probe (provider);
if (!self->v4l2)
return TRUE;
bus = gst_device_provider_get_bus (self->v4l2);
gst_bus_enable_sync_message_emission (bus);
self->bus_watch_id = g_signal_connect (bus, "sync-message",
G_CALLBACK (_bus_message_cb), self);
gst_object_unref (bus);
for (tmp = devs; tmp; tmp = tmp->next)
gst_device_provider_device_add (provider, tmp->data);
g_list_free (devs);
return TRUE;
}
static void
gst_uvc_h264_device_provider_stop (GstDeviceProvider * provider)
{
GstBus *bus;
GstUvcH264DeviceProvider *self = (GstUvcH264DeviceProvider *) provider;
if (!self->v4l2)
return;
if (self->usb_ctx)
libusb_exit (self->usb_ctx);
self->usb_ctx = NULL;
bus = gst_device_provider_get_bus (self->v4l2);
g_signal_handler_disconnect (bus, self->bus_watch_id);
self->bus_watch_id = 0;
gst_clear_object (&self->v4l2);
gst_clear_object (&bus);
return;
}
static void
gst_uvc_h264_device_provider_class_init (GstUvcH264DeviceProviderClass * klass)
{
GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS (klass);
dm_class->probe = gst_uvc_h264_device_provider_probe;
dm_class->start = gst_uvc_h264_device_provider_start;
dm_class->stop = gst_uvc_h264_device_provider_stop;
gst_device_provider_class_set_static_metadata (dm_class,
"UVC H.264 Device Provider", "Video/CameraSource",
"List and provides UVC H.264 source devices",
"Thibault Saunier <tsaunier@igalia.com>");
}
static void
gst_uvc_h264_device_provider_init (GstUvcH264DeviceProvider * self)
{
}
......@@ -2,6 +2,7 @@ uvch264_sources = [
'gstuvch264.c',
'gstuvch264_mjpgdemux.c',
'gstuvch264_src.c',
'gstuvch264deviceprovider.c',
'uvc_h264.c',
]
......
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