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gltransformation: let graphene alloc its structures memory aligned

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With NEON instructions enabled, graphene expects the memory passed to it
16-byte-aligned. Otherwise unaligned memory access faults occur causing
SIGBUS signals.

graphene has alloc functions for its structures that take care of this,
so use them.

See also: https://github.com/ebassi/graphene/issues/215#issuecomment-794744829

Suggested-by: Sebastian Dröge <sebastian@centricular.com>
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1321>
This commit is contained in:
Bastian Krause 2022-04-06 18:08:46 +02:00
parent 42ec223f94
commit c39181903e
2 changed files with 81 additions and 44 deletions
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109
subprojects/gst-plugins-base/ext/gl/gstgltransformation.c
View file

@ -93,6 +93,7 @@ G_DEFINE_TYPE_WITH_CODE (GstGLTransformation, gst_gl_transformation,
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (gltransformation, "gltransformation",
GST_RANK_NONE, GST_TYPE_GL_TRANSFORMATION, gl_element_init (plugin));
static void gst_gl_transformation_finalize (GObject * object);
static void gst_gl_transformation_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_transformation_get_property (GObject * object, guint prop_id,
@ -247,6 +248,8 @@ gst_gl_transformation_class_init (GstGLTransformationClass * klass)
GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api =
GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2;
gobject_class->finalize = gst_gl_transformation_finalize;
}
static void
@ -263,9 +266,43 @@ gst_gl_transformation_init (GstGLTransformation * filter)
filter->in_tex = 0;
/* let graphene alloc its structures with correct memory alignment, otherwise
* unaligned memory access faults can occur */
filter->model_matrix = graphene_matrix_alloc ();
filter->view_matrix = graphene_matrix_alloc ();
filter->projection_matrix = graphene_matrix_alloc ();
filter->inv_model_matrix = graphene_matrix_alloc ();
filter->inv_view_matrix = graphene_matrix_alloc ();
filter->inv_projection_matrix = graphene_matrix_alloc ();
filter->mvp_matrix = graphene_matrix_alloc ();
filter->camera_position = graphene_vec3_alloc ();
gst_gl_transformation_build_mvp (filter);
}
static void
gst_gl_transformation_finalize (GObject * object)
{
GstGLTransformation *transformation;
g_return_if_fail (GST_IS_GL_TRANSFORMATION (object));
transformation = GST_GL_TRANSFORMATION (object);
graphene_matrix_free (transformation->model_matrix);
graphene_matrix_free (transformation->view_matrix);
graphene_matrix_free (transformation->projection_matrix);
graphene_matrix_free (transformation->inv_model_matrix);
graphene_matrix_free (transformation->inv_view_matrix);
graphene_matrix_free (transformation->inv_projection_matrix);
graphene_matrix_free (transformation->mvp_matrix);
graphene_vec3_free (transformation->camera_position);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
{
@ -273,9 +310,9 @@ gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
graphene_matrix_t modelview_matrix;
if (!filter->out_info.finfo) {
graphene_matrix_init_identity (&transformation->model_matrix);
graphene_matrix_init_identity (&transformation->view_matrix);
graphene_matrix_init_identity (&transformation->projection_matrix);
graphene_matrix_init_identity (transformation->model_matrix);
graphene_matrix_init_identity (transformation->view_matrix);
graphene_matrix_init_identity (transformation->projection_matrix);
} else {
graphene_point3d_t translation_vector =
GRAPHENE_POINT3D_INIT (transformation->xtranslation * 2.0 *
@ -296,47 +333,47 @@ gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
gboolean current_passthrough;
gboolean passthrough;
graphene_vec3_init (&transformation->camera_position, 0.f, 0.f, 1.f);
graphene_vec3_init (transformation->camera_position, 0.f, 0.f, 1.f);
graphene_vec3_init (&center, 0.f, 0.f, 0.f);
graphene_vec3_init (&up, 0.f, 1.f, 0.f);
/* Translate into pivot origin */
graphene_matrix_init_translate (&transformation->model_matrix,
graphene_matrix_init_translate (transformation->model_matrix,
&pivot_vector);
/* Scale */
graphene_matrix_scale (&transformation->model_matrix,
graphene_matrix_scale (transformation->model_matrix,
transformation->xscale, transformation->yscale, 1.0f);
/* Rotation */
graphene_matrix_rotate (&transformation->model_matrix,
graphene_matrix_rotate (transformation->model_matrix,
transformation->xrotation, graphene_vec3_x_axis ());
graphene_matrix_rotate (&transformation->model_matrix,
graphene_matrix_rotate (transformation->model_matrix,
transformation->yrotation, graphene_vec3_y_axis ());
graphene_matrix_rotate (&transformation->model_matrix,
graphene_matrix_rotate (transformation->model_matrix,
transformation->zrotation, graphene_vec3_z_axis ());
/* Translate back from pivot origin */
graphene_point3d_scale (&pivot_vector, -1.0, &negative_pivot_vector);
graphene_matrix_translate (&transformation->model_matrix,
graphene_matrix_translate (transformation->model_matrix,
&negative_pivot_vector);
/* Translation */
graphene_matrix_translate (&transformation->model_matrix,
graphene_matrix_translate (transformation->model_matrix,
&translation_vector);
if (transformation->ortho) {
graphene_matrix_init_ortho (&transformation->projection_matrix,
graphene_matrix_init_ortho (transformation->projection_matrix,
-transformation->aspect, transformation->aspect,
-1, 1, transformation->znear, transformation->zfar);
} else {
graphene_matrix_init_perspective (&transformation->projection_matrix,
graphene_matrix_init_perspective (transformation->projection_matrix,
transformation->fov,
transformation->aspect, transformation->znear, transformation->zfar);
}
graphene_matrix_init_look_at (&transformation->view_matrix,
&transformation->camera_position, &center, &up);
graphene_matrix_init_look_at (transformation->view_matrix,
transformation->camera_position, &center, &up);
current_passthrough =
gst_base_transform_is_passthrough (GST_BASE_TRANSFORM (transformation));
@ -353,17 +390,17 @@ gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
}
}
graphene_matrix_multiply (&transformation->model_matrix,
&transformation->view_matrix, &modelview_matrix);
graphene_matrix_multiply (transformation->model_matrix,
transformation->view_matrix, &modelview_matrix);
graphene_matrix_multiply (&modelview_matrix,
&transformation->projection_matrix, &transformation->mvp_matrix);
transformation->projection_matrix, transformation->mvp_matrix);
graphene_matrix_inverse (&transformation->model_matrix,
&transformation->inv_model_matrix);
graphene_matrix_inverse (&transformation->view_matrix,
&transformation->inv_view_matrix);
graphene_matrix_inverse (&transformation->projection_matrix,
&transformation->inv_projection_matrix);
graphene_matrix_inverse (transformation->model_matrix,
transformation->inv_model_matrix);
graphene_matrix_inverse (transformation->view_matrix,
transformation->inv_view_matrix);
graphene_matrix_inverse (transformation->projection_matrix,
transformation->inv_projection_matrix);
}
static void
@ -467,7 +504,7 @@ gst_gl_transformation_get_property (GObject * object, guint prop_id,
break;
case PROP_MVP:
/* FIXME: need to decompose this to support navigation events */
g_value_set_boxed (value, (gconstpointer) & filter->mvp_matrix);
g_value_set_boxed (value, (gconstpointer) filter->mvp_matrix);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -519,7 +556,7 @@ _screen_coord_to_world_ray (GstGLTransformation * transformation, float x,
graphene_point3d_init (&ray_clip, graphene_vec2_get_x (&screen_coord),
graphene_vec2_get_y (&screen_coord), -1.);
graphene_matrix_transform_point3d (&transformation->inv_projection_matrix,
graphene_matrix_transform_point3d (transformation->inv_projection_matrix,
&ray_clip, &ray_eye);
graphene_vec3_init (&ray_eye_vec3, ray_eye.x, ray_eye.y, -1.);
@ -530,11 +567,11 @@ _screen_coord_to_world_ray (GstGLTransformation * transformation, float x,
ray_origin = &ray_eye_vec3;
ray_direction = &ray_ortho_dir;
} else {
graphene_matrix_transform_vec3 (&transformation->inv_view_matrix,
graphene_matrix_transform_vec3 (transformation->inv_view_matrix,
&ray_eye_vec3, &ray_world_dir);
graphene_vec3_normalize (&ray_world_dir, &ray_world_dir);
ray_origin = &transformation->camera_position;
ray_origin = transformation->camera_position;
ray_direction = &ray_world_dir;
}
@ -561,13 +598,13 @@ _init_world_video_plane (GstGLTransformation * transformation,
graphene_point3d_init (&bottom_left, -transformation->aspect, -1., 0.);
graphene_point3d_init (&bottom_right, transformation->aspect, -1., 0.);
graphene_matrix_transform_point3d (&transformation->model_matrix,
graphene_matrix_transform_point3d (transformation->model_matrix,
&bottom_left, &world_bottom_left);
graphene_matrix_transform_point3d (&transformation->model_matrix,
graphene_matrix_transform_point3d (transformation->model_matrix,
&bottom_right, &world_bottom_right);
graphene_matrix_transform_point3d (&transformation->model_matrix,
graphene_matrix_transform_point3d (transformation->model_matrix,
&top_left, &world_top_left);
graphene_matrix_transform_point3d (&transformation->model_matrix,
graphene_matrix_transform_point3d (transformation->model_matrix,
&top_right, &world_top_right);
graphene_plane_init_from_points (video_plane, &world_bottom_left,
@ -589,7 +626,7 @@ _screen_coord_to_model_coord (GstGLTransformation * transformation,
_init_world_video_plane (transformation, &video_plane);
_screen_coord_to_world_ray (transformation, x, y, &ray);
_intersect_plane_and_ray (&video_plane, &ray, &world_point);
graphene_matrix_transform_point3d (&transformation->inv_model_matrix,
graphene_matrix_transform_point3d (transformation->inv_model_matrix,
&world_point, &model_coord);
/* ndc to pixels. We render the frame Y-flipped so need to unflip the
@ -648,7 +685,7 @@ _vertex_to_screen_coord (GstGLTransformation * transformation,
graphene_vec4_t clip;
graphene_vec3_t ndc;
graphene_matrix_transform_vec4 (&transformation->mvp_matrix, vertex, &clip);
graphene_matrix_transform_vec4 (transformation->mvp_matrix, vertex, &clip);
_perspective_division (&clip, &ndc);
_ndc_to_viewport (transformation, &ndc, 0, 0, w, h, 0., 1., view);
}
@ -812,7 +849,7 @@ gst_gl_transformation_prepare_output_buffer (GstBaseTransform * trans,
/* invert the aspect effects */
graphene_matrix_multiply (&upstream_matrix, &inv_aspect, &tmp2);
/* apply the transformation */
graphene_matrix_multiply (&tmp2, &transformation->mvp_matrix, &tmp);
graphene_matrix_multiply (&tmp2, transformation->mvp_matrix, &tmp);
/* and undo yflip */
graphene_matrix_multiply (&tmp, &yflip, &tmp2);
@ -932,7 +969,7 @@ gst_gl_transformation_callback (gpointer stuff)
gl->BindTexture (GL_TEXTURE_2D, transformation->in_tex->tex_id);
gst_gl_shader_set_uniform_1i (transformation->shader, "texture", 0);
graphene_matrix_to_float (&transformation->mvp_matrix, temp_matrix);
graphene_matrix_to_float (transformation->mvp_matrix, temp_matrix);
gst_gl_shader_set_uniform_matrix_4fv (transformation->shader,
"u_transformation", 1, GL_FALSE, temp_matrix);

16
subprojects/gst-plugins-base/ext/gl/gstgltransformation.h
View file

@ -73,15 +73,15 @@ struct _GstGLTransformation
gfloat zfar;
gboolean ortho;
graphene_matrix_t model_matrix;
graphene_matrix_t view_matrix;
graphene_matrix_t projection_matrix;
graphene_matrix_t inv_model_matrix;
graphene_matrix_t inv_view_matrix;
graphene_matrix_t inv_projection_matrix;
graphene_matrix_t mvp_matrix;
graphene_matrix_t *model_matrix;
graphene_matrix_t *view_matrix;
graphene_matrix_t *projection_matrix;
graphene_matrix_t *inv_model_matrix;
graphene_matrix_t *inv_view_matrix;
graphene_matrix_t *inv_projection_matrix;
graphene_matrix_t *mvp_matrix;
graphene_vec3_t camera_position;
graphene_vec3_t *camera_position;
gboolean downstream_supports_affine_meta;
gboolean caps_change;