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/*
* Copyright (C) 2018 Metrological Group B.V.
* Author: Thibault Saunier <tsaunier@igalia.com>
* Author: Alejandro G. Castro <alex@igalia.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
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#if ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
#include "GStreamerCaptureDeviceManager.h"
#include "GStreamerCommon.h"
namespace WebCore {
GST_DEBUG_CATEGORY(webkitGStreamerCaptureDeviceManagerDebugCategory);
#define GST_CAT_DEFAULT webkitGStreamerCaptureDeviceManagerDebugCategory
static gint sortDevices(gconstpointer a, gconstpointer b)
{
GstDevice* adev = GST_DEVICE(a), *bdev = GST_DEVICE(b);
GUniquePtr<GstStructure> aprops(gst_device_get_properties(adev));
GUniquePtr<GstStructure> bprops(gst_device_get_properties(bdev));
gboolean aIsDefault = FALSE, bIsDefault = FALSE;
gst_structure_get_boolean(aprops.get(), "is-default", &aIsDefault);
gst_structure_get_boolean(bprops.get(), "is-default", &bIsDefault);
if (aIsDefault == bIsDefault) {
GUniquePtr<char> aName(gst_device_get_display_name(adev));
GUniquePtr<char> bName(gst_device_get_display_name(bdev));
return g_strcmp0(aName.get(), bName.get());
}
return aIsDefault > bIsDefault ? -1 : 1;
}
GStreamerAudioCaptureDeviceManager& GStreamerAudioCaptureDeviceManager::singleton()
{
static NeverDestroyed<GStreamerAudioCaptureDeviceManager> manager;
return manager;
}
GStreamerVideoCaptureDeviceManager& GStreamerVideoCaptureDeviceManager::singleton()
{
static NeverDestroyed<GStreamerVideoCaptureDeviceManager> manager;
return manager;
}
GStreamerCaptureDeviceManager::~GStreamerCaptureDeviceManager()
{
if (m_deviceMonitor)
gst_device_monitor_stop(m_deviceMonitor.get());
}
std::optional<GStreamerCaptureDevice> GStreamerCaptureDeviceManager::gstreamerDeviceWithUID(const String& deviceID)
{
captureDevices();
for (auto& device : m_gstreamerDevices) {
if (device.persistentId() == deviceID)
return device;
}
return std::nullopt;
}
const Vector<CaptureDevice>& GStreamerCaptureDeviceManager::captureDevices()
{
ensureGStreamerInitialized();
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
GST_DEBUG_CATEGORY_INIT(webkitGStreamerCaptureDeviceManagerDebugCategory, "webkitcapturedevicemanager", 0, "WebKit Capture Device Manager");
});
if (m_devices.isEmpty())
refreshCaptureDevices();
return m_devices;
}
void GStreamerCaptureDeviceManager::addDevice(GRefPtr<GstDevice>&& device)
{
GUniquePtr<GstStructure> properties(gst_device_get_properties(device.get()));
const char* klass = gst_structure_get_string(properties.get(), "device.class");
if (klass && !g_strcmp0(klass, "monitor"))
return;
CaptureDevice::DeviceType type = deviceType();
GUniquePtr<char> deviceClassChar(gst_device_get_device_class(device.get()));
auto deviceClass = String::fromLatin1(deviceClassChar.get());
if (type == CaptureDevice::DeviceType::Microphone && !deviceClass.startsWith("Audio"_s))
return;
if (type == CaptureDevice::DeviceType::Camera && !deviceClass.startsWith("Video"_s))
return;
// This isn't really a UID but should be good enough (libwebrtc
// itself does that at least for pulseaudio devices).
GUniquePtr<char> deviceName(gst_device_get_display_name(device.get()));
GST_INFO("Registering device %s", deviceName.get());
gboolean isDefault = FALSE;
gst_structure_get_boolean(properties.get(), "is-default", &isDefault);
String identifier = makeString(isDefault ? "default: " : "", deviceName.get());
auto gstCaptureDevice = GStreamerCaptureDevice(WTFMove(device), identifier, type, identifier);
gstCaptureDevice.setEnabled(true);
m_gstreamerDevices.append(WTFMove(gstCaptureDevice));
// FIXME: We need a CaptureDevice copy in other vector just for captureDevices API.
auto captureDevice = CaptureDevice(identifier, type, identifier);
captureDevice.setEnabled(true);
m_devices.append(WTFMove(captureDevice));
}
void GStreamerCaptureDeviceManager::refreshCaptureDevices()
{
m_devices.clear();
if (!m_deviceMonitor) {
m_deviceMonitor = adoptGRef(gst_device_monitor_new());
switch (deviceType()) {
case CaptureDevice::DeviceType::Camera: {
gst_device_monitor_add_filter(m_deviceMonitor.get(), "Video/Source", nullptr);
break;
}
case CaptureDevice::DeviceType::Microphone: {
auto caps = adoptGRef(gst_caps_new_empty_simple("audio/x-raw"));
gst_device_monitor_add_filter(m_deviceMonitor.get(), "Audio/Source", caps.get());
break;
}
case CaptureDevice::DeviceType::SystemAudio:
case CaptureDevice::DeviceType::Speaker:
// FIXME: Add Audio/Sink filter. See https://bugs.webkit.org/show_bug.cgi?id=216880
case CaptureDevice::DeviceType::Screen:
case CaptureDevice::DeviceType::Window:
break;
case CaptureDevice::DeviceType::Unknown:
return;
}
auto bus = adoptGRef(gst_device_monitor_get_bus(m_deviceMonitor.get()));
gst_bus_add_watch(bus.get(), reinterpret_cast<GstBusFunc>(+[](GstBus*, GstMessage* message, GStreamerCaptureDeviceManager* manager) -> gboolean {
#ifndef GST_DISABLE_GST_DEBUG
GRefPtr<GstDevice> device;
GUniquePtr<char> name;
#endif
switch (GST_MESSAGE_TYPE(message)) {
case GST_MESSAGE_DEVICE_ADDED:
#ifndef GST_DISABLE_GST_DEBUG
gst_message_parse_device_added(message, &device.outPtr());
name.reset(gst_device_get_display_name(device.get()));
GST_INFO("Device added: %s", name.get());
#endif
manager->deviceChanged();
break;
case GST_MESSAGE_DEVICE_REMOVED:
#ifndef GST_DISABLE_GST_DEBUG
gst_message_parse_device_removed(message, &device.outPtr());
name.reset(gst_device_get_display_name(device.get()));
GST_INFO("Device removed: %s", name.get());
#endif
manager->deviceChanged();
break;
default:
break;
}
return G_SOURCE_CONTINUE;
}), this);
if (!gst_device_monitor_start(m_deviceMonitor.get())) {
GST_WARNING_OBJECT(m_deviceMonitor.get(), "Could not start device monitor");
m_deviceMonitor = nullptr;
return;
}
}
GList* devices = g_list_sort(gst_device_monitor_get_devices(m_deviceMonitor.get()), sortDevices);
while (devices) {
addDevice(GST_DEVICE_CAST(devices->data));
devices = g_list_delete_link(devices, devices);
}
}
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
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