gstreamer/subprojects/gst-plugins-bad/sys/applemedia/avfdeviceprovider.m

253 lines
7.6 KiB
Objective-C

/* GStreamer
* Copyright (C) 2019 Josh Matthews <josh@joshmatthews.net>
*
* avfdeviceprovider.c: AVF 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#import <AVFoundation/AVFoundation.h>
#include "avfvideosrc.h"
#include "avfdeviceprovider.h"
#include <string.h>
#include <gst/gst.h>
static GstDevice *gst_avf_device_new (const gchar * device_name, int device_index,
GstCaps * caps, GstAvfDeviceType type,
GstStructure *props);
G_DEFINE_TYPE (GstAVFDeviceProvider, gst_avf_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static GList *gst_avf_device_provider_probe (GstDeviceProvider * provider);
static void
gst_avf_device_provider_class_init (GstAVFDeviceProviderClass * klass)
{
GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS (klass);
// TODO: Add start/stop callbacks to receive device notifications.
// https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/886
dm_class->probe = gst_avf_device_provider_probe;
gst_device_provider_class_set_static_metadata (dm_class,
"AVF Device Provider", "Source/Video",
"List and provide AVF source devices",
"Josh Matthews <josh@joshmatthews.net>");
}
static void
gst_avf_device_provider_init (GstAVFDeviceProvider * self)
{
}
static GstStructure *
gst_av_capture_device_get_props (AVCaptureDevice *device)
{
char *unique_id, *model_id;
GstStructure *props = gst_structure_new_empty ("avf-proplist");
unique_id = g_strdup ([[device uniqueID] UTF8String]);
model_id = g_strdup ([[device modelID] UTF8String]);
gst_structure_set (props,
"device.api", G_TYPE_STRING, "avf",
"avf.unique_id", G_TYPE_STRING, unique_id,
"avf.model_id", G_TYPE_STRING, model_id,
"avf.has_flash", G_TYPE_BOOLEAN, [device hasFlash],
"avf.has_torch", G_TYPE_BOOLEAN, [device hasTorch],
NULL);
g_free (unique_id);
g_free (model_id);
#if !HAVE_IOS
char *manufacturer = g_strdup ([[device manufacturer] UTF8String]);
gst_structure_set (props,
"avf.manufacturer", G_TYPE_STRING, manufacturer,
NULL);
g_free (manufacturer);
#endif
return props;
}
static GList *
gst_avf_device_provider_probe (GstDeviceProvider * provider)
{
GList *result;
result = NULL;
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
for (int i = 0; i < [devices count]; i++) {
AVCaptureDevice *device = [devices objectAtIndex:i];
g_assert (device != nil);
GstCaps *caps = gst_av_capture_device_get_caps (device, output, GST_AVF_VIDEO_SOURCE_ORIENTATION_DEFAULT);
GstStructure *props = gst_av_capture_device_get_props (device);
const gchar *deviceName = [[device localizedName] UTF8String];
GstDevice *gst_device = gst_avf_device_new (deviceName, i, caps, GST_AVF_DEVICE_TYPE_VIDEO_SOURCE, props);
result = g_list_prepend (result, gst_object_ref_sink (gst_device));
gst_structure_free (props);
}
result = g_list_reverse (result);
return result;
}
enum
{
PROP_DEVICE_INDEX = 1
};
G_DEFINE_TYPE (GstAvfDevice, gst_avf_device, GST_TYPE_DEVICE);
static GstElement *gst_avf_device_create_element (GstDevice * device,
const gchar * name);
static gboolean gst_avf_device_reconfigure_element (GstDevice * device,
GstElement * element);
static void gst_avf_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_avf_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void
gst_avf_device_class_init (GstAvfDeviceClass * klass)
{
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
dev_class->create_element = gst_avf_device_create_element;
dev_class->reconfigure_element = gst_avf_device_reconfigure_element;
object_class->get_property = gst_avf_device_get_property;
object_class->set_property = gst_avf_device_set_property;
g_object_class_install_property (object_class, PROP_DEVICE_INDEX,
g_param_spec_int ("device-index", "Device Index",
"The zero-based device index", -1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT_ONLY));
}
static void
gst_avf_device_init (GstAvfDevice * device)
{
}
static GstElement *
gst_avf_device_create_element (GstDevice * device, const gchar * name)
{
GstAvfDevice *avf_dev = GST_AVF_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make (avf_dev->element, name);
g_object_set (elem, "device-index", avf_dev->device_index, NULL);
return elem;
}
static gboolean
gst_avf_device_reconfigure_element (GstDevice * device, GstElement * element)
{
GstAvfDevice *avf_dev = GST_AVF_DEVICE (device);
if (!strcmp (avf_dev->element, "avfvideosrc") && GST_IS_AVF_VIDEO_SRC (element)) {
g_object_set (element, "device-index", avf_dev->device_index, NULL);
return TRUE;
}
return FALSE;
}
static void
gst_avf_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAvfDevice *device;
device = GST_AVF_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_INDEX:
g_value_set_int (value, device->device_index);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avf_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAvfDevice *device;
device = GST_AVF_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_INDEX:
device->device_index = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstDevice *
gst_avf_device_new (const gchar * device_name, int device_index, GstCaps * caps, GstAvfDeviceType type, GstStructure *props)
{
GstAvfDevice *gstdev;
const gchar *element = NULL;
const gchar *klass = NULL;
g_return_val_if_fail (device_name, NULL);
g_return_val_if_fail (caps, NULL);
switch (type) {
case GST_AVF_DEVICE_TYPE_VIDEO_SOURCE:
element = "avfvideosrc";
klass = "Video/Source";
break;
default:
g_assert_not_reached ();
break;
}
gstdev = g_object_new (GST_TYPE_AVF_DEVICE,
"display-name", device_name, "caps", caps, "device-class", klass,
"device-index", device_index, "properties", props, NULL);
gstdev->type = type;
gstdev->element = element;
return GST_DEVICE (gstdev);
}