libs: add a vaapi blend class

Support for the VA-API VPP blend functions.

3 files changed, 436 insertions, 0 deletions

diff --git a/gst-libs/gst/vaapi/gstvaapiblend.c b/gst-libs/gst/vaapi/gstvaapiblend.c
new file mode 100644
index 00000000..7cf56b00
--- /dev/null
+++ b/gst-libs/gst/vaapi/gstvaapiblend.c
@@ -0,0 +1,369 @@
+/*
+ *  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);
+
+  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);
+
+  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;
+#endif
+
+  if (!(blend->flags & VA_BLEND_GLOBAL_ALPHA)) {
+    GST_WARNING_OBJECT (blend, "VPP does not support global alpha blending");
+    return FALSE;
+  }
+
+  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));
+}
+
+/**
+ * gst_vaapi_blend_process_begin:
+ * @blend: a #GstVaapiBlend
+ * @surface: the  #GstVaapiSurface output target
+ *
+ * Locks the VA display and prepares the VA processing pipeline for rendering.
+ *
+ * If this function fails, then the VA display is unlocked before returning.
+ *
+ * If this function succeeds, it must be paired with a call to
+ * #gst_vaapi_blend_process_end to ensure the VA processing pipeline is
+ * finalized and the VA display is unlocked.
+ *
+ * Returns: %TRUE if successful, %FALSE otherwise.
+ */
+gboolean
+gst_vaapi_blend_process_begin (GstVaapiBlend * blend, GstVaapiSurface * surface)
+{
+  VAStatus va_status;
+
+  g_return_val_if_fail (blend != NULL, FALSE);
+  g_return_val_if_fail (surface != NULL, FALSE);
+
+  GST_VAAPI_DISPLAY_LOCK (blend->display);
+
+  va_status = vaBeginPicture (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
+      blend->va_context, GST_VAAPI_OBJECT_ID (surface));
+
+  if (!vaapi_check_status (va_status, "vaBeginPicture()")) {
+    GST_VAAPI_DISPLAY_UNLOCK (blend->display);
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+/**
+ * gst_vaapi_blend_process_render:
+ * @blend: a #GstVaapiBlend
+ * @surface: the source #GstVaapiSurface to send to the VA processing pipeline
+ * for rendering.
+ * @crop_rect: the @surface crop extents to process for rendering.
+ * @target_rect: the extents for which the @surface is rendered within the
+ * output surface.
+ * @alpha: the alpha value in the range 0.0 to 1.0, inclusive, for blending
+ * with the output surface background or with previously rendered surfaces.
+ *
+ * Renders the @surface in the currently active VA processing pipeline.
+ *
+ * This function must only be called after a successful call to
+ * #gst_vaapi_blend_process_begin and before calling
+ * #gst_vaapi_process_end.
+ *
+ * Returns: %TRUE if successful, %FALSE otherwise.
+ */
+gboolean
+gst_vaapi_blend_process_render (GstVaapiBlend * blend,
+    const GstVaapiSurface * surface, const GstVaapiRectangle * crop_rect,
+    const GstVaapiRectangle * target_rect, gdouble alpha)
+{
+  VADisplay va_display;
+  VAStatus va_status;
+  VAProcPipelineParameterBuffer *param = NULL;
+  VABufferID id = VA_INVALID_ID;
+  VARectangle src_rect = { 0, }, dst_rect = {
+  0,};
+#if VA_CHECK_VERSION(1,1,0)
+  VABlendState blend_state;
+#endif
+
+  g_return_val_if_fail (blend != NULL, FALSE);
+  g_return_val_if_fail (surface != NULL, FALSE);
+
+  va_display = GST_VAAPI_DISPLAY_VADISPLAY (blend->display);
+
+  /* Build surface region (source) */
+  src_rect.width = GST_VAAPI_SURFACE_WIDTH (surface);
+  src_rect.height = GST_VAAPI_SURFACE_HEIGHT (surface);
+  if (crop_rect) {
+    if ((crop_rect->x + crop_rect->width > src_rect.width) ||
+        (crop_rect->y + crop_rect->height > src_rect.height))
+      return FALSE;
+
+    src_rect.x = crop_rect->x;
+    src_rect.y = crop_rect->y;
+    src_rect.width = crop_rect->width;
+    src_rect.height = crop_rect->height;
+  }
+
+  /* Build output region (target) */
+  dst_rect.width = src_rect.width;
+  dst_rect.height = src_rect.height;
+  if (target_rect) {
+    dst_rect.x = target_rect->x;
+    dst_rect.y = target_rect->y;
+    dst_rect.width = target_rect->width;
+    dst_rect.height = target_rect->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_OBJECT_ID (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 = alpha;
+  param->blend_state = &blend_state;
+#endif
+
+  vaapi_unmap_buffer (va_display, id, NULL);
+
+  va_status = vaRenderPicture (va_display, blend->va_context, &id, 1);
+  if (!vaapi_check_status (va_status, "vaRenderPicture()")) {
+    vaapi_destroy_buffer (va_display, &id);
+    return FALSE;
+  }
+
+  vaapi_destroy_buffer (va_display, &id);
+
+  return TRUE;
+}
+
+/**
+ * gst_vaapi_blend_process_end:
+ * @blend: a #GstVaapiBlend
+ *
+ * Finalizes all pending render operations in the active VA processing pipeline
+ * and unlocks the VA display.
+ *
+ * This function must always be paired with a call to
+ * #gst_vaapi_blend_process_begin to ensure the VA display gets unlocked.
+ *
+ * Returns: %TRUE if successful, %FALSE otherwise.
+ */
+gboolean
+gst_vaapi_blend_process_end (GstVaapiBlend * blend)
+{
+  VAStatus va_status;
+
+  g_return_val_if_fail (blend != NULL, FALSE);
+
+  va_status = vaEndPicture (GST_VAAPI_DISPLAY_VADISPLAY (blend->display),
+      blend->va_context);
+
+  GST_VAAPI_DISPLAY_UNLOCK (blend->display);
+
+  if (!vaapi_check_status (va_status, "vaEndPicture()"))
+    return FALSE;
+
+  return TRUE;
+}
diff --git a/gst-libs/gst/vaapi/gstvaapiblend.h b/gst-libs/gst/vaapi/gstvaapiblend.h
new file mode 100644
index 00000000..60c30c83
--- /dev/null
+++ b/gst-libs/gst/vaapi/gstvaapiblend.h
@@ -0,0 +1,65 @@
+/*
+ *  gstvaapiblend.h - 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
+ */
+
+#ifndef GST_VAAPI_BLEND_H
+#define GST_VAAPI_BLEND_H
+
+#include <gst/vaapi/gstvaapisurface.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_VAAPI_BLEND \
+  (gst_vaapi_blend_get_type ())
+#define GST_VAAPI_BLEND(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VAAPI_BLEND, GstVaapiBlend))
+#define GST_IS_VAAPI_BLEND(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VAAPI_BLEND))
+
+typedef struct _GstVaapiBlend GstVaapiBlend;
+
+GstVaapiBlend *
+gst_vaapi_blend_new (GstVaapiDisplay * display);
+
+void
+gst_vaapi_blend_replace (GstVaapiBlend ** old_blend_ptr,
+    GstVaapiBlend * new_blend);
+
+gboolean
+gst_vaapi_blend_process_begin (GstVaapiBlend * blend,
+    GstVaapiSurface * surface);
+
+gboolean
+gst_vaapi_blend_process_render (GstVaapiBlend * blend,
+    const GstVaapiSurface * surface, const GstVaapiRectangle * crop_rect,
+    const GstVaapiRectangle * target_rect, gdouble alpha);
+
+gboolean
+gst_vaapi_blend_process_end (GstVaapiBlend * blend);
+
+GType
+gst_vaapi_blend_get_type (void) G_GNUC_CONST;
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstVaapiBlend, gst_object_unref)
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_FILTER_H */
diff --git a/gst-libs/gst/vaapi/meson.build b/gst-libs/gst/vaapi/meson.build
index 68b60eb8..83f4a1d5 100644
--- a/gst-libs/gst/vaapi/meson.build
+++ b/gst-libs/gst/vaapi/meson.build
@@ -1,4 +1,5 @@
 gstlibvaapi_sources = [
+  'gstvaapiblend.c',
   'gstvaapibufferproxy.c',
   'gstvaapicodec_objects.c',
   'gstvaapicontext.c',
@@ -44,6 +45,7 @@ gstlibvaapi_sources = [
 ]
 
 gstlibvaapi_headers = [
+  'gstvaapiblend.h',
   'gstvaapibufferproxy.h',
   'gstvaapidecoder.h',
   'gstvaapidecoder_h264.h',