gstreamer/subprojects/gstreamer-vaapi/gst-libs/gst/vaapi/gstvaapiblend.c

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/*
* gstvaapiblend.c - Video processing blend
*
* Copyright (C) 2019 Intel Corporation
* Author: U. Artie Eoff <ullysses.a.eoff@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "sysdeps.h"
#include "gstvaapicompat.h"
#include "gstvaapiblend.h"
#include "gstvaapiutils.h"
#include "gstvaapivalue.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapisurface_priv.h"
struct _GstVaapiBlend
{
GstObject parent_instance;
GstVaapiDisplay *display;
VAConfigID va_config;
VAContextID va_context;
guint32 flags;
};
typedef struct _GstVaapiBlendClass GstVaapiBlendClass;
struct _GstVaapiBlendClass
{
GstObjectClass parent_class;
};
GST_DEBUG_CATEGORY_STATIC (gst_debug_vaapi_blend);
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT gst_debug_vaapi_blend
#else
#define GST_CAT_DEFAULT NULL
#endif
G_DEFINE_TYPE_WITH_CODE (GstVaapiBlend, gst_vaapi_blend, GST_TYPE_OBJECT,
GST_DEBUG_CATEGORY_INIT (gst_debug_vaapi_blend, "vaapiblend", 0,
"VA-API Blend"));
enum
{
PROP_DISPLAY = 1,
};
static void
gst_vaapi_blend_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstVaapiBlend *const blend = GST_VAAPI_BLEND (object);
switch (property_id) {
case PROP_DISPLAY:{
GstVaapiDisplay *display = g_value_get_object (value);;
if (display) {
if (GST_VAAPI_DISPLAY_HAS_VPP (display)) {
blend->display = gst_object_ref (display);
} else {
GST_WARNING_OBJECT (blend, "GstVaapiDisplay doesn't support VPP");
}
}
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gst_vaapi_blend_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstVaapiBlend *const blend = GST_VAAPI_BLEND (object);
switch (property_id) {
case PROP_DISPLAY:
g_value_set_object (value, blend->display);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gst_vaapi_blend_finalize (GObject * object)
{
GstVaapiBlend *const blend = GST_VAAPI_BLEND (object);
if (!blend->display)
goto bail;
GST_VAAPI_DISPLAY_LOCK (blend->display);
if (blend->va_context != VA_INVALID_ID) {
vaDestroyContext (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
blend->va_context);
blend->va_context = VA_INVALID_ID;
}
if (blend->va_config != VA_INVALID_ID) {
vaDestroyConfig (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
blend->va_config);
blend->va_config = VA_INVALID_ID;
}
GST_VAAPI_DISPLAY_UNLOCK (blend->display);
gst_vaapi_display_replace (&blend->display, NULL);
bail:
G_OBJECT_CLASS (gst_vaapi_blend_parent_class)->finalize (object);
}
static void
gst_vaapi_blend_class_init (GstVaapiBlendClass * klass)
{
GObjectClass *const object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gst_vaapi_blend_set_property;
object_class->get_property = gst_vaapi_blend_get_property;
object_class->finalize = gst_vaapi_blend_finalize;
g_object_class_install_property (object_class, PROP_DISPLAY,
g_param_spec_object ("display", "Gst VA-API Display",
"The VA-API display object to use", GST_TYPE_VAAPI_DISPLAY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME));
}
static void
gst_vaapi_blend_init (GstVaapiBlend * blend)
{
blend->display = NULL;
blend->va_config = VA_INVALID_ID;
blend->va_context = VA_INVALID_ID;
blend->flags = 0;
}
static gboolean
gst_vaapi_blend_initialize (GstVaapiBlend * blend)
{
VAStatus status;
VAProcPipelineCaps pipeline_caps = { 0, };
if (!blend->display)
return FALSE;
status = vaCreateConfig (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
VAProfileNone, VAEntrypointVideoProc, NULL, 0, &blend->va_config);
if (!vaapi_check_status (status, "vaCreateConfig() [VPP]"))
return FALSE;
status = vaCreateContext (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
blend->va_config, 0, 0, 0, NULL, 0, &blend->va_context);
if (!vaapi_check_status (status, "vaCreateContext() [VPP]"))
return FALSE;
#if VA_CHECK_VERSION(1,1,0)
status =
vaQueryVideoProcPipelineCaps (GST_VAAPI_DISPLAY_VADISPLAY
(blend->display), blend->va_context, NULL, 0, &pipeline_caps);
if (vaapi_check_status (status, "vaQueryVideoProcPipelineCaps()"))
blend->flags = pipeline_caps.blend_flags;
if (!(blend->flags & VA_BLEND_GLOBAL_ALPHA)) {
GST_WARNING_OBJECT (blend, "VPP does not support global alpha blending");
return FALSE;
}
#else
return FALSE;
#endif
return TRUE;
}
GstVaapiBlend *
gst_vaapi_blend_new (GstVaapiDisplay * display)
{
GstVaapiBlend *blend = g_object_new (GST_TYPE_VAAPI_BLEND,
"display", display, NULL);
if (!gst_vaapi_blend_initialize (blend)) {
gst_object_unref (blend);
blend = NULL;
}
return blend;
}
void
gst_vaapi_blend_replace (GstVaapiBlend ** old_blend_ptr,
GstVaapiBlend * new_blend)
{
g_return_if_fail (old_blend_ptr != NULL);
gst_object_replace ((GstObject **) old_blend_ptr, GST_OBJECT (new_blend));
}
static gboolean
gst_vaapi_blend_process_unlocked (GstVaapiBlend * blend,
GstVaapiSurface * output, GstVaapiBlendSurfaceNextFunc next,
gpointer user_data)
{
VAStatus va_status;
VADisplay va_display;
GstVaapiBlendSurface *current;
va_display = GST_VAAPI_DISPLAY_VADISPLAY (blend->display);
va_status = vaBeginPicture (va_display, blend->va_context,
GST_VAAPI_SURFACE_ID (output));
if (!vaapi_check_status (va_status, "vaBeginPicture()"))
return FALSE;
current = next (user_data);
for (; current; current = next (user_data)) {
VAProcPipelineParameterBuffer *param = NULL;
VABufferID id = VA_INVALID_ID;
VARectangle src_rect = { 0, };
VARectangle dst_rect = { 0, };
#if VA_CHECK_VERSION(1,1,0)
VABlendState blend_state;
#endif
if (!current->surface)
return FALSE;
/* Build surface region (source) */
src_rect.width = GST_VAAPI_SURFACE_WIDTH (current->surface);
src_rect.height = GST_VAAPI_SURFACE_HEIGHT (current->surface);
if (current->crop) {
if ((current->crop->x + current->crop->width > src_rect.width) ||
(current->crop->y + current->crop->height > src_rect.height))
return FALSE;
src_rect.x = current->crop->x;
src_rect.y = current->crop->y;
src_rect.width = current->crop->width;
src_rect.height = current->crop->height;
}
/* Build output region (target) */
dst_rect.x = current->target.x;
dst_rect.y = current->target.y;
dst_rect.width = current->target.width;
dst_rect.height = current->target.height;
if (!vaapi_create_buffer (va_display, blend->va_context,
VAProcPipelineParameterBufferType, sizeof (*param), NULL, &id,
(gpointer *) & param))
return FALSE;
memset (param, 0, sizeof (*param));
param->surface = GST_VAAPI_SURFACE_ID (current->surface);
param->surface_region = &src_rect;
param->output_region = &dst_rect;
param->output_background_color = 0xff000000;
#if VA_CHECK_VERSION(1,1,0)
blend_state.flags = VA_BLEND_GLOBAL_ALPHA;
blend_state.global_alpha = current->alpha;
param->blend_state = &blend_state;
#endif
vaapi_unmap_buffer (va_display, id, NULL);
va_status = vaRenderPicture (va_display, blend->va_context, &id, 1);
vaapi_destroy_buffer (va_display, &id);
if (!vaapi_check_status (va_status, "vaRenderPicture()"))
return FALSE;
}
va_status = vaEndPicture (va_display, blend->va_context);
if (!vaapi_check_status (va_status, "vaEndPicture()"))
return FALSE;
return TRUE;
}
/**
* gst_vaapi_blend_process:
* @blend: a #GstVaapiBlend instance.
* @output: a #GstVaapiSurface to be composed.
* @next: a function to fetch the next #GstVaapiBlendSurface to
* process.
* @data: state storage for @next.
*
* This function will process all the input surfaces defined through
* #GstVaapiBlendSurface and will blend them onto the @output surface.
*
* Returns: %TRUE if the blend process succeed; otherwise %FALSE.
**/
gboolean
gst_vaapi_blend_process (GstVaapiBlend * blend, GstVaapiSurface * output,
GstVaapiBlendSurfaceNextFunc next, gpointer user_data)
{
gboolean result;
g_return_val_if_fail (blend != NULL, FALSE);
g_return_val_if_fail (output != NULL, FALSE);
g_return_val_if_fail (next != NULL, FALSE);
GST_VAAPI_DISPLAY_LOCK (blend->display);
result = gst_vaapi_blend_process_unlocked (blend, output, next, user_data);
GST_VAAPI_DISPLAY_UNLOCK (blend->display);
return result;
}