gstreamer/sys/asio/gstasiodeviceprovider.cpp

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/* GStreamer
* Copyright (C) 2021 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 "gstasiodeviceprovider.h"
#include "gstasioutils.h"
#include "gstasioobject.h"
#include <atlconv.h>
enum
{
PROP_0,
PROP_DEVICE_CLSID,
};
struct _GstAsioDevice
{
GstDevice parent;
gchar *device_clsid;
const gchar *factory_name;
};
G_DEFINE_TYPE (GstAsioDevice, gst_asio_device, GST_TYPE_DEVICE);
static void gst_asio_device_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_asio_device_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_asio_device_finalize (GObject * object);
static GstElement *gst_asio_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_asio_device_class_init (GstAsioDeviceClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
dev_class->create_element = gst_asio_device_create_element;
gobject_class->get_property = gst_asio_device_get_property;
gobject_class->set_property = gst_asio_device_set_property;
gobject_class->finalize = gst_asio_device_finalize;
g_object_class_install_property (gobject_class, PROP_DEVICE_CLSID,
g_param_spec_string ("device-clsid", "Device CLSID",
"ASIO device CLSID as string including curly brackets", NULL,
(GParamFlags) (G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)));
}
static void
gst_asio_device_init (GstAsioDevice * self)
{
}
static void
gst_asio_device_finalize (GObject * object)
{
GstAsioDevice *self = GST_ASIO_DEVICE (object);
g_free (self->device_clsid);
G_OBJECT_CLASS (gst_asio_device_parent_class)->finalize (object);
}
static GstElement *
gst_asio_device_create_element (GstDevice * device, const gchar * name)
{
GstAsioDevice *self = GST_ASIO_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make (self->factory_name, name);
g_object_set (elem, "device-clsid", self->device_clsid, NULL);
return elem;
}
static void
gst_asio_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAsioDevice *self = GST_ASIO_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE_CLSID:
g_value_set_string (value, self->device_clsid);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_asio_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAsioDevice *self = GST_ASIO_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE_CLSID:
g_free (self->device_clsid);
self->device_clsid = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
struct _GstAsioDeviceProvider
{
GstDeviceProvider parent;
};
G_DEFINE_TYPE (GstAsioDeviceProvider, gst_asio_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static GList *gst_asio_device_provider_probe (GstDeviceProvider * provider);
static void
gst_asio_device_provider_class_init (GstAsioDeviceProviderClass * klass)
{
GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS (klass);
provider_class->probe = GST_DEBUG_FUNCPTR (gst_asio_device_provider_probe);
gst_device_provider_class_set_static_metadata (provider_class,
"ASIO Device Provider",
"Source/Sink/Audio", "List ASIO source and sink devices",
"Seungha Yang <seungha@centricular.com>");
}
static void
gst_asio_device_provider_init (GstAsioDeviceProvider * provider)
{
}
static void
gst_asio_device_provider_probe_internal (GstAsioDeviceProvider * self,
gboolean is_src, GList * asio_device_list, GList ** devices)
{
const gchar *device_class, *factory_name;
GList *iter;
USES_CONVERSION;
if (is_src) {
device_class = "Audio/Source";
factory_name = "asiosrc";
} else {
device_class = "Audio/Sink";
factory_name = "asiosink";
}
for (iter = asio_device_list; iter; iter = g_list_next (iter)) {
GstDevice *device;
GstAsioDeviceInfo *info = (GstAsioDeviceInfo *) iter->data;
GstAsioObject *obj;
GstCaps *caps = nullptr;
GstStructure *props = nullptr;
long max_in_ch = 0;
long max_out_ch = 0;
HRESULT hr;
LPOLESTR clsid_str = nullptr;
glong min_buf_size = 0;
glong max_buf_size = 0;
glong preferred_buf_size = 0;
glong buf_size_granularity = 0;
obj = gst_asio_object_new (info, FALSE);
if (!obj)
continue;
if (!gst_asio_object_get_max_num_channels (obj, &max_in_ch, &max_out_ch))
goto done;
if (is_src && max_in_ch <= 0)
goto done;
else if (!is_src && max_out_ch <= 0)
goto done;
if (is_src) {
caps = gst_asio_object_get_caps (obj,
GST_ASIO_DEVICE_CLASS_CAPTURE, 1, max_in_ch);
} else {
caps = gst_asio_object_get_caps (obj,
GST_ASIO_DEVICE_CLASS_RENDER, 1, max_out_ch);
}
if (!caps)
goto done;
hr = StringFromIID (info->clsid, &clsid_str);
if (FAILED (hr))
goto done;
if (!gst_asio_object_get_buffer_size (obj, &min_buf_size, &max_buf_size,
&preferred_buf_size, &buf_size_granularity))
goto done;
props = gst_structure_new ("asio-proplist",
"device.api", G_TYPE_STRING, "asio",
"device.clsid", G_TYPE_STRING, OLE2A (clsid_str),
"asio.device.description", G_TYPE_STRING, info->driver_desc,
"asio.device.min-buf-size", G_TYPE_LONG, min_buf_size,
"asio.device.max-buf-size", G_TYPE_LONG, max_buf_size,
"asio.device.preferred-buf-size", G_TYPE_LONG, preferred_buf_size,
"asio.device.buf-size-granularity", G_TYPE_LONG, buf_size_granularity,
nullptr);
device = (GstDevice *) g_object_new (GST_TYPE_ASIO_DEVICE,
"device-clsid", OLE2A (clsid_str),
"display-name", info->driver_desc, "caps", caps,
"device-class", device_class, "properties", props, nullptr);
GST_ASIO_DEVICE (device)->factory_name = factory_name;
*devices = g_list_append (*devices, device);
done:
gst_clear_caps (&caps);
gst_clear_object (&obj);
if (props)
gst_structure_free (props);
}
return;
}
static GList *
gst_asio_device_provider_probe (GstDeviceProvider * provider)
{
GstAsioDeviceProvider *self = GST_ASIO_DEVICE_PROVIDER (provider);
GList *devices = nullptr;
guint num_device;
GList *asio_device_list = nullptr;
num_device = gst_asio_enum (&asio_device_list);
if (num_device == 0)
return nullptr;
gst_asio_device_provider_probe_internal (self,
TRUE, asio_device_list, &devices);
gst_asio_device_provider_probe_internal (self,
FALSE, asio_device_list, &devices);
g_list_free_full (asio_device_list,
(GDestroyNotify) gst_asio_device_info_free);
return devices;
}