gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/va/gstvadisplay.c

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/* GStreamer
* Copyright (C) 2020 Igalia, S.L.
* Author: Víctor Jáquez <vjaquez@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 along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstvadisplay
* @title: GstVaDisplay
* @short_description: Generic VADisplay wrapper.
* @sources:
* - gstva.h
* - gstvadisplay.h
*
* It is a generic wrapper for VADisplay. To create new instances
* subclasses are required, depending on the display type to use
* (v.gr. DRM, X11, Wayland, etc.).
*
* The purpose of this class is to be shared among pipelines via
* #GstContext so all the VA processing elements will use the same
* display entry. Application developers can create their own
* subclass, based on their display, and shared it via the synced bus
* message for the application.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvadisplay.h"
#include <va/va.h>
GST_DEBUG_CATEGORY (gst_va_display_debug);
#define GST_CAT_DEFAULT gst_va_display_debug
typedef struct _GstVaDisplayPrivate GstVaDisplayPrivate;
struct _GstVaDisplayPrivate
{
VADisplay display;
gboolean foreign;
gboolean init;
GstVaImplementation impl;
gchar *vendor_desc;
};
#define gst_va_display_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstVaDisplay, gst_va_display, GST_TYPE_OBJECT,
G_ADD_PRIVATE (GstVaDisplay);
GST_DEBUG_CATEGORY_INIT (gst_va_display_debug, "vadisplay", 0,
"VA Display"));
enum
{
PROP_VA_DISPLAY = 1,
PROP_DESC,
N_PROPERTIES
};
static GParamSpec *g_properties[N_PROPERTIES];
#define GET_PRIV(obj) gst_va_display_get_instance_private (GST_VA_DISPLAY (obj))
static GstVaImplementation
_get_implementation (const char *vendor)
{
if (g_str_has_prefix (vendor, "Mesa Gallium driver"))
return GST_VA_IMPLEMENTATION_MESA_GALLIUM;
else if (g_str_has_prefix (vendor, "Intel i965 driver"))
return GST_VA_IMPLEMENTATION_INTEL_I965;
else if (g_str_has_prefix (vendor, "Intel iHD driver"))
return GST_VA_IMPLEMENTATION_INTEL_IHD;
return GST_VA_IMPLEMENTATION_OTHER;
}
static char *
_get_desc (const char *vendor, GstVaImplementation impl)
{
char *end, *start;
char desc[1024];
size_t size;
if (impl == GST_VA_IMPLEMENTATION_OTHER)
return g_strdup (vendor);
start = strstr (vendor, "for ");
if (!start)
return g_strdup (vendor);
start += 4;
switch (impl) {
case GST_VA_IMPLEMENTATION_MESA_GALLIUM:
end = strchr (start, '(');
break;
default:
end = strstr (start, "- ");
break;
}
if (!end)
return g_strdup (vendor);
end -= 1;
size = MIN (1024, end - start);
memcpy (desc, start, size);
desc[size] = '\0';
return g_strdup (desc);
}
static gboolean
_gst_va_display_filter_driver (GstVaDisplay * self, gpointer foreign_display)
{
GstVaDisplayPrivate *priv = GET_PRIV (self);
VADisplay dpy;
const char *vendor;
g_assert ((foreign_display != NULL) ^ (priv->display != NULL));
dpy = foreign_display ? foreign_display : priv->display;
vendor = vaQueryVendorString (dpy);
GST_INFO ("VA-API driver vendor: %s", vendor);
/* XXX(victor): driver allow list */
if (foreign_display) {
priv->display = foreign_display;
priv->foreign = TRUE;
}
priv->impl = _get_implementation (vendor);
priv->vendor_desc = _get_desc (vendor, priv->impl);
return TRUE;
}
static void
gst_va_display_set_display (GstVaDisplay * self, gpointer display)
{
GstVaDisplayPrivate *priv = GET_PRIV (self);
if (!display)
return;
if (vaDisplayIsValid (display) == 0) {
GST_WARNING_OBJECT (self,
"User's VA display is invalid. An internal one will be tried.");
return;
}
/* assume driver is already initialized */
priv->init = TRUE;
_gst_va_display_filter_driver (self, display);
}
static void
gst_va_display_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVaDisplay *self = GST_VA_DISPLAY (object);
switch (prop_id) {
case PROP_VA_DISPLAY:{
gpointer display = g_value_get_pointer (value);
gst_va_display_set_display (self, display);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_va_display_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVaDisplayPrivate *priv = GET_PRIV (object);
switch (prop_id) {
case PROP_VA_DISPLAY:
g_value_set_pointer (value, priv->display);
break;
case PROP_DESC:
g_value_set_string (value, priv->vendor_desc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_va_display_constructed (GObject * object)
{
GstVaDisplay *self = GST_VA_DISPLAY (object);
GstVaDisplayPrivate *priv = GET_PRIV (object);
GstVaDisplayClass *klass = GST_VA_DISPLAY_GET_CLASS (object);
if (!priv->display && klass->create_va_display)
priv->display = klass->create_va_display (self);
G_OBJECT_CLASS (parent_class)->constructed (object);
}
static void
gst_va_display_dispose (GObject * object)
{
GstVaDisplayPrivate *priv = GET_PRIV (object);
if (priv->display && !priv->foreign)
vaTerminate (priv->display);
priv->display = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_va_display_finalize (GObject * object)
{
GstVaDisplayPrivate *priv = GET_PRIV (object);
g_free (priv->vendor_desc);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_va_display_class_init (GstVaDisplayClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gst_va_display_set_property;
gobject_class->get_property = gst_va_display_get_property;
gobject_class->constructed = gst_va_display_constructed;
gobject_class->dispose = gst_va_display_dispose;
gobject_class->finalize = gst_va_display_finalize;
g_properties[PROP_VA_DISPLAY] =
g_param_spec_pointer ("va-display", "VADisplay", "VA Display handler",
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
g_properties[PROP_DESC] =
g_param_spec_string ("description", "Description",
"Vendor specific VA implementation description", NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, N_PROPERTIES, g_properties);
}
static void
gst_va_display_init (GstVaDisplay * self)
{
GstVaDisplayPrivate *priv = GET_PRIV (self);
priv->impl = GST_VA_IMPLEMENTATION_INVALID;
}
#ifndef GST_DISABLE_GST_DEBUG
static gchar *
_strip_msg (const char *message)
{
gchar *msg = g_strdup (message);
if (!msg)
return NULL;
return g_strstrip (msg);
}
static void
_va_warning (gpointer object, const char *message)
{
GstVaDisplay *self = GST_VA_DISPLAY (object);
gchar *msg;
if ((msg = _strip_msg (message))) {
GST_WARNING_OBJECT (self, "VA error: %s", msg);
g_free (msg);
}
}
static void
_va_info (gpointer object, const char *message)
{
GstVaDisplay *self = GST_VA_DISPLAY (object);
gchar *msg;
if ((msg = _strip_msg (message))) {
GST_INFO_OBJECT (self, "VA info: %s", msg);
g_free (msg);
}
}
#endif
/**
* gst_va_display_initialize:
* @self: a #GstVaDisplay
*
* If the display is set by the user (foreign) it is assumed that the
* driver is already initialized, thus this function is noop.
*
* If the display is opened internally, this function will initialize
* the driver and it will set driver's message callbacks.
*
* NOTE: this function is supposed to be private, only used by
* GstVaDisplay descendants.
*
* Returns: %TRUE if the VA driver can be initialized; %FALSE
* otherwise
*
* Since: 1.20
**/
gboolean
gst_va_display_initialize (GstVaDisplay * self)
{
GstVaDisplayPrivate *priv;
VAStatus status;
int major_version = -1, minor_version = -1;
g_return_val_if_fail (GST_IS_VA_DISPLAY (self), FALSE);
priv = GET_PRIV (self);
if (priv->init)
return TRUE;
if (!priv->display)
return FALSE;
#ifndef GST_DISABLE_GST_DEBUG
vaSetErrorCallback (priv->display, _va_warning, self);
vaSetInfoCallback (priv->display, _va_info, self);
#endif
status = vaInitialize (priv->display, &major_version, &minor_version);
if (status != VA_STATUS_SUCCESS) {
GST_WARNING_OBJECT (self, "vaInitialize: %s", vaErrorStr (status));
return FALSE;
}
GST_INFO_OBJECT (self, "VA-API version %d.%d", major_version, minor_version);
priv->init = TRUE;
if (!_gst_va_display_filter_driver (self, NULL))
return FALSE;
return TRUE;
}
/**
* gst_va_display_get_va_dpy:
* @self: a #GstVaDisplay type display.
*
* Get the VA display handle of the @self.
*
* Returns: the VA display handle.
*
* Since: 1.20
*/
gpointer
gst_va_display_get_va_dpy (GstVaDisplay * self)
{
VADisplay dpy;
g_return_val_if_fail (GST_IS_VA_DISPLAY (self), NULL);
g_object_get (self, "va-display", &dpy, NULL);
return dpy;
}
/**
* gst_va_display_get_implementation:
* @self: a #GstVaDisplay type display.
*
* Get the the #GstVaImplementation type of @self.
*
* Returns: #GstVaImplementation.
*
* Since: 1.20
*/
GstVaImplementation
gst_va_display_get_implementation (GstVaDisplay * self)
{
GstVaDisplayPrivate *priv;
g_return_val_if_fail (GST_IS_VA_DISPLAY (self),
GST_VA_IMPLEMENTATION_INVALID);
priv = GET_PRIV (self);
return priv->impl;
}