gstreamer/subprojects/gst-plugins-bad/sys/mediafoundation/gstmfdevice.cpp

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/* GStreamer
* Copyright (C) 2020 Seungha Yang <seungha@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstmfconfig.h"
#include "gstmfvideosrc.h"
#include "gstmfutils.h"
#include "gstmfsourceobject.h"
#include "gstmfdevice.h"
#if GST_MF_WINAPI_DESKTOP
#include "gstwin32devicewatcher.h"
#include "gstmfcapturedshow.h"
#ifndef INITGUID
#include <initguid.h>
#endif
#include <dbt.h>
DEFINE_GUID (GST_KSCATEGORY_CAPTURE, 0x65E8773DL, 0x8F56,
0x11D0, 0xA3, 0xB9, 0x00, 0xA0, 0xC9, 0x22, 0x31, 0x96);
#endif
#if GST_MF_WINAPI_APP
#include <gst/winrt/gstwinrt.h>
/* *INDENT-OFF* */
using namespace ABI::Windows::Devices::Enumeration;
/* *INDENT-ON* */
#endif
GST_DEBUG_CATEGORY_EXTERN (gst_mf_debug);
#define GST_CAT_DEFAULT gst_mf_debug
enum
{
PROP_0,
PROP_DEVICE_PATH,
};
struct _GstMFDevice
{
GstDevice parent;
gchar *device_path;
};
G_DEFINE_TYPE (GstMFDevice, gst_mf_device, GST_TYPE_DEVICE);
static void gst_mf_device_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_mf_device_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_mf_device_finalize (GObject * object);
static GstElement *gst_mf_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_mf_device_class_init (GstMFDeviceClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
dev_class->create_element = gst_mf_device_create_element;
gobject_class->get_property = gst_mf_device_get_property;
gobject_class->set_property = gst_mf_device_set_property;
gobject_class->finalize = gst_mf_device_finalize;
g_object_class_install_property (gobject_class, PROP_DEVICE_PATH,
g_param_spec_string ("device-path", "Device Path",
"The device path", nullptr,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS)));
}
static void
gst_mf_device_init (GstMFDevice * self)
{
}
static void
gst_mf_device_finalize (GObject * object)
{
GstMFDevice *self = GST_MF_DEVICE (object);
g_free (self->device_path);
G_OBJECT_CLASS (gst_mf_device_parent_class)->finalize (object);
}
static GstElement *
gst_mf_device_create_element (GstDevice * device, const gchar * name)
{
GstMFDevice *self = GST_MF_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make ("mfvideosrc", name);
g_object_set (elem, "device-path", self->device_path, nullptr);
return elem;
}
static void
gst_mf_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMFDevice *self = GST_MF_DEVICE (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 void
gst_mf_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMFDevice *self = GST_MF_DEVICE (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;
}
}
struct _GstMFDeviceProvider
{
GstDeviceProvider parent;
GstObject *watcher;
GMutex lock;
GCond cond;
gboolean enum_completed;
};
G_DEFINE_TYPE (GstMFDeviceProvider, gst_mf_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static void gst_mf_device_provider_dispose (GObject * object);
static void gst_mf_device_provider_finalize (GObject * object);
static GList *gst_mf_device_provider_probe (GstDeviceProvider * provider);
static gboolean gst_mf_device_provider_start (GstDeviceProvider * provider);
static void gst_mf_device_provider_stop (GstDeviceProvider * provider);
#if GST_MF_WINAPI_DESKTOP
static gboolean gst_mf_device_provider_start_win32 (GstDeviceProvider * self);
static void gst_mf_device_provider_device_changed (GstWin32DeviceWatcher *
watcher, WPARAM wparam, LPARAM lparam, gpointer user_data);
#endif
#if GST_MF_WINAPI_APP
static gboolean gst_mf_device_provider_start_winrt (GstDeviceProvider * self);
static void
gst_mf_device_provider_device_added (GstWinRTDeviceWatcher * watcher,
IDeviceInformation * info, gpointer user_data);
static void
gst_mf_device_provider_device_updated (GstWinRTDeviceWatcher * watcher,
IDeviceInformationUpdate * info_update, gpointer user_data);
static void gst_mf_device_provider_device_removed (GstWinRTDeviceWatcher *
watcher, IDeviceInformationUpdate * info_update, gpointer user_data);
static void
gst_mf_device_provider_device_enum_completed (GstWinRTDeviceWatcher *
watcher, gpointer user_data);
#endif
static void
gst_mf_device_provider_on_device_updated (GstMFDeviceProvider * self);
static void
gst_mf_device_provider_class_init (GstMFDeviceProviderClass * klass)
{
GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS (klass);
provider_class->probe = GST_DEBUG_FUNCPTR (gst_mf_device_provider_probe);
provider_class->start = GST_DEBUG_FUNCPTR (gst_mf_device_provider_start);
provider_class->stop = GST_DEBUG_FUNCPTR (gst_mf_device_provider_stop);
gst_device_provider_class_set_static_metadata (provider_class,
"Media Foundation Device Provider",
"Source/Video", "List Media Foundation source devices",
"Seungha Yang <seungha@centricular.com>");
}
static void
gst_mf_device_provider_init (GstMFDeviceProvider * self)
{
#if GST_MF_WINAPI_DESKTOP
GstWin32DeviceWatcherCallbacks win32_callbacks;
win32_callbacks.device_changed = gst_mf_device_provider_device_changed;
self->watcher = (GstObject *)
gst_win32_device_watcher_new (DBT_DEVTYP_DEVICEINTERFACE,
&GST_KSCATEGORY_CAPTURE, &win32_callbacks, self);
#endif
#if GST_MF_WINAPI_APP
if (!self->watcher) {
GstWinRTDeviceWatcherCallbacks winrt_callbacks;
winrt_callbacks.added = gst_mf_device_provider_device_added;
winrt_callbacks.updated = gst_mf_device_provider_device_updated;
winrt_callbacks.removed = gst_mf_device_provider_device_removed;
winrt_callbacks.enumeration_completed =
gst_mf_device_provider_device_enum_completed;
self->watcher = (GstObject *)
gst_winrt_device_watcher_new (GST_WINRT_DEVICE_CLASS_VIDEO_CAPTURE,
&winrt_callbacks, self);
}
#endif
g_mutex_init (&self->lock);
g_cond_init (&self->cond);
}
static void
gst_mf_device_provider_dispose (GObject * object)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (object);
gst_clear_object (&self->watcher);
G_OBJECT_CLASS (gst_mf_device_provider_parent_class)->dispose (object);
}
static void
gst_mf_device_provider_finalize (GObject * object)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (object);
g_mutex_clear (&self->lock);
g_cond_clear (&self->cond);
G_OBJECT_CLASS (gst_mf_device_provider_parent_class)->finalize (object);
}
static void
gst_mf_device_provider_probe_internal (GstDeviceProvider * provider,
gboolean try_dshow, GList ** list)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
gint i;
for (i = 0;; i++) {
GstMFSourceObject *obj = nullptr;
GstDevice *device;
GstStructure *props = nullptr;
GstCaps *caps = nullptr;
gchar *device_name = nullptr;
gchar *device_path = nullptr;
#if GST_MF_WINAPI_DESKTOP
if (try_dshow) {
obj = gst_mf_capture_dshow_new (GST_MF_SOURCE_TYPE_VIDEO, i,
nullptr, nullptr);
} else {
obj = gst_mf_source_object_new (GST_MF_SOURCE_TYPE_VIDEO,
i, nullptr, nullptr, nullptr);
}
#else
obj = gst_mf_source_object_new (GST_MF_SOURCE_TYPE_VIDEO,
i, nullptr, nullptr, nullptr);
#endif
if (!obj)
break;
caps = gst_mf_source_object_get_caps (obj);
if (!caps) {
GST_WARNING_OBJECT (self, "Empty caps for device index %d", i);
goto next;
}
g_object_get (obj,
"device-path", &device_path, "device-name", &device_name, nullptr);
if (!device_path) {
GST_WARNING_OBJECT (self, "Device path is unavailable");
goto next;
}
if (!device_name) {
GST_WARNING_OBJECT (self, "Device name is unavailable");
goto next;
}
props = gst_structure_new ("mf-proplist",
"device.api", G_TYPE_STRING, "mediafoundation",
"device.path", G_TYPE_STRING, device_path,
"device.name", G_TYPE_STRING, device_name, nullptr);
device = (GstDevice *) g_object_new (GST_TYPE_MF_DEVICE,
"device-path", device_path,
"display-name", device_name, "caps", caps,
"device-class", "Source/Video", "properties", props, nullptr);
*list = g_list_append (*list, device);
next:
if (caps)
gst_caps_unref (caps);
if (props)
gst_structure_free (props);
g_free (device_path);
g_free (device_name);
gst_object_unref (obj);
}
}
static GList *
gst_mf_device_provider_probe (GstDeviceProvider * provider)
{
GList *list = nullptr;
gst_mf_device_provider_probe_internal (provider, FALSE, &list);
#if GST_MF_WINAPI_DESKTOP
gst_mf_device_provider_probe_internal (provider, TRUE, &list);
#endif
return list;
}
#if GST_MF_WINAPI_DESKTOP
static gboolean
gst_mf_device_provider_start_win32 (GstDeviceProvider * provider)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
GstWin32DeviceWatcher *watcher;
GList *devices = nullptr;
GList *iter;
if (!GST_IS_WIN32_DEVICE_WATCHER (self->watcher))
return FALSE;
GST_DEBUG_OBJECT (self, "Starting Win32 watcher");
watcher = GST_WIN32_DEVICE_WATCHER (self->watcher);
devices = gst_mf_device_provider_probe (provider);
if (devices) {
for (iter = devices; iter; iter = g_list_next (iter)) {
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
}
g_list_free (devices);
}
return gst_win32_device_watcher_start (watcher);
}
#endif
#if GST_MF_WINAPI_APP
static gboolean
gst_mf_device_provider_start_winrt (GstDeviceProvider * provider)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
GstWinRTDeviceWatcher *watcher;
GList *devices = nullptr;
GList *iter;
if (!GST_IS_WINRT_DEVICE_WATCHER (self->watcher))
return FALSE;
GST_DEBUG_OBJECT (self, "Starting WinRT watcher");
watcher = GST_WINRT_DEVICE_WATCHER (self->watcher);
self->enum_completed = FALSE;
if (!gst_winrt_device_watcher_start (watcher))
return FALSE;
/* Wait for initial enumeration to be completed */
g_mutex_lock (&self->lock);
while (!self->enum_completed)
g_cond_wait (&self->cond, &self->lock);
devices = gst_mf_device_provider_probe (provider);
if (devices) {
for (iter = devices; iter; iter = g_list_next (iter)) {
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
}
g_list_free (devices);
}
g_mutex_unlock (&self->lock);
return TRUE;
}
#endif
static gboolean
gst_mf_device_provider_start (GstDeviceProvider * provider)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
gboolean ret = FALSE;
if (!self->watcher) {
GST_ERROR_OBJECT (self, "DeviceWatcher object wasn't configured");
return FALSE;
}
#if GST_MF_WINAPI_DESKTOP
ret = gst_mf_device_provider_start_win32 (provider);
#endif
#if GST_MF_WINAPI_APP
if (!ret)
ret = gst_mf_device_provider_start_winrt (provider);
#endif
return ret;
}
static void
gst_mf_device_provider_stop (GstDeviceProvider * provider)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
if (self->watcher) {
#if GST_MF_WINAPI_DESKTOP
if (GST_IS_WIN32_DEVICE_WATCHER (self->watcher)) {
gst_win32_device_watcher_stop (GST_WIN32_DEVICE_WATCHER (self->watcher));
}
#endif
#if GST_MF_WINAPI_APP
if (GST_IS_WINRT_DEVICE_WATCHER (self->watcher)) {
gst_winrt_device_watcher_stop (GST_WINRT_DEVICE_WATCHER (self->watcher));
}
#endif
}
}
static gboolean
gst_mf_device_is_in_list (GList * list, GstDevice * device)
{
GList *iter;
GstStructure *s;
const gchar *device_id;
gboolean found = FALSE;
s = gst_device_get_properties (device);
g_assert (s);
device_id = gst_structure_get_string (s, "device.path");
g_assert (device_id);
for (iter = list; iter; iter = g_list_next (iter)) {
GstStructure *other_s;
const gchar *other_id;
other_s = gst_device_get_properties (GST_DEVICE (iter->data));
g_assert (other_s);
other_id = gst_structure_get_string (other_s, "device.path");
g_assert (other_id);
if (g_ascii_strcasecmp (device_id, other_id) == 0) {
found = TRUE;
}
gst_structure_free (other_s);
if (found)
break;
}
gst_structure_free (s);
return found;
}
static void
gst_mf_device_provider_update_devices (GstMFDeviceProvider * self)
{
GstDeviceProvider *provider = GST_DEVICE_PROVIDER_CAST (self);
GList *prev_devices = nullptr;
GList *new_devices = nullptr;
GList *to_add = nullptr;
GList *to_remove = nullptr;
GList *iter;
GST_OBJECT_LOCK (self);
prev_devices = g_list_copy_deep (provider->devices,
(GCopyFunc) gst_object_ref, nullptr);
GST_OBJECT_UNLOCK (self);
new_devices = gst_mf_device_provider_probe (provider);
/* Ownership of GstDevice for gst_device_provider_device_add()
* and gst_device_provider_device_remove() is a bit complicated.
* Remove floating reference here for things to be clear */
for (iter = new_devices; iter; iter = g_list_next (iter))
gst_object_ref_sink (iter->data);
/* Check newly added devices */
for (iter = new_devices; iter; iter = g_list_next (iter)) {
if (!gst_mf_device_is_in_list (prev_devices, GST_DEVICE (iter->data))) {
to_add = g_list_prepend (to_add, gst_object_ref (iter->data));
}
}
/* Check removed device */
for (iter = prev_devices; iter; iter = g_list_next (iter)) {
if (!gst_mf_device_is_in_list (new_devices, GST_DEVICE (iter->data))) {
to_remove = g_list_prepend (to_remove, gst_object_ref (iter->data));
}
}
for (iter = to_remove; iter; iter = g_list_next (iter))
gst_device_provider_device_remove (provider, GST_DEVICE (iter->data));
for (iter = to_add; iter; iter = g_list_next (iter))
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
if (prev_devices)
g_list_free_full (prev_devices, (GDestroyNotify) gst_object_unref);
if (to_add)
g_list_free_full (to_add, (GDestroyNotify) gst_object_unref);
if (to_remove)
g_list_free_full (to_remove, (GDestroyNotify) gst_object_unref);
}
#if GST_MF_WINAPI_DESKTOP
static void
gst_mf_device_provider_device_changed (GstWin32DeviceWatcher * watcher,
WPARAM wparam, LPARAM lparam, gpointer user_data)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
if (wparam == DBT_DEVICEARRIVAL || wparam == DBT_DEVICEREMOVECOMPLETE) {
gst_mf_device_provider_update_devices (self);
}
}
#endif
#if GST_MF_WINAPI_APP
static void
gst_mf_device_provider_device_added (GstWinRTDeviceWatcher * watcher,
IDeviceInformation * info, gpointer user_data)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
if (self->enum_completed)
gst_mf_device_provider_update_devices (self);
}
static void
gst_mf_device_provider_device_removed (GstWinRTDeviceWatcher * watcher,
IDeviceInformationUpdate * info_update, gpointer user_data)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
if (self->enum_completed)
gst_mf_device_provider_update_devices (self);
}
static void
gst_mf_device_provider_device_updated (GstWinRTDeviceWatcher * watcher,
IDeviceInformationUpdate * info_update, gpointer user_data)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
gst_mf_device_provider_update_devices (self);
}
static void
gst_mf_device_provider_device_enum_completed (GstWinRTDeviceWatcher *
watcher, gpointer user_data)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
g_mutex_lock (&self->lock);
GST_DEBUG_OBJECT (self, "Enumeration completed");
self->enum_completed = TRUE;
g_cond_signal (&self->cond);
g_mutex_unlock (&self->lock);
}
#endif