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plugin: paintable: Support setting media rotation. Contributes to #310

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Rotation can be set by passing a GstVideoOrientationMethod to the
gst_clapper_paintable_set_rotation() function.

The actual rotation is done through GskTransforms directly on the
Snapshot.

Signed-off-by: Eugenio Paolantonio (g7) <me@medesimo.eu>
This commit is contained in:
Eugenio Paolantonio (g7)
2023-03-26 16:20:56 +02:00
parent 7fc93fbebc
commit 4e250c8f2a
2 changed files with 109 additions and 11 deletions
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105
lib/gst/plugin/gstclapperpaintable.c
View File

@@ -23,6 +23,8 @@
#include "gstclapperpaintable.h"
#include "gstgtkutils.h"
#define DEFAULT_PAR_N 1
#define DEFAULT_PAR_D 1
@@ -57,6 +59,8 @@ gst_clapper_paintable_init (GstClapperPaintable *self)
self->display_height = 1;
self->display_aspect_ratio = 1.0;
self->rotation = GST_VIDEO_ORIENTATION_IDENTITY;
self->par_n = DEFAULT_PAR_N;
self->par_d = DEFAULT_PAR_D;
@@ -111,8 +115,8 @@ calculate_display_par (GstClapperPaintable *self, const GstVideoInfo *info)
gint width, height, par_n, par_d, req_par_n, req_par_d;
gboolean success;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
gst_gtk_get_width_height_for_rotation (GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), &width, &height, self->rotation);
/* Cannot apply aspect ratio if there is no video */
if (width == 0 || height == 0)
@@ -152,8 +156,9 @@ invalidate_paintable_size_internal (GstClapperPaintable *self)
GST_CLAPPER_PAINTABLE_LOCK (self);
video_width = GST_VIDEO_INFO_WIDTH (&self->v_info);
video_height = GST_VIDEO_INFO_HEIGHT (&self->v_info);
gst_gtk_get_width_height_for_rotation (GST_VIDEO_INFO_WIDTH (&self->v_info),
GST_VIDEO_INFO_HEIGHT (&self->v_info), &video_height, &video_width,
self->rotation);
display_ratio_num = self->display_ratio_num;
display_ratio_den = self->display_ratio_den;
@@ -322,6 +327,38 @@ gst_clapper_paintable_set_pixel_aspect_ratio (GstClapperPaintable *self,
GST_CLAPPER_PAINTABLE_UNLOCK (self);
}
void
gst_clapper_paintable_set_rotation (GstClapperPaintable *self,
GstVideoOrientationMethod rotation)
{
GST_CLAPPER_PAINTABLE_LOCK (self);
self->rotation = rotation;
if (G_UNLIKELY (!calculate_display_par (self, &self->v_info))) {
GST_CLAPPER_PAINTABLE_UNLOCK (self);
return;
}
self->pending_resize = TRUE;
GST_CLAPPER_PAINTABLE_UNLOCK (self);
}
GstVideoOrientationMethod
gst_clapper_paintable_get_rotation (GstClapperPaintable *self)
{
GstVideoOrientationMethod rotation;
GST_CLAPPER_PAINTABLE_LOCK (self);
rotation = self->rotation;
GST_CLAPPER_PAINTABLE_UNLOCK (self);
return rotation;
}
/*
* GdkPaintableInterface
*/
@@ -331,6 +368,8 @@ gst_clapper_paintable_snapshot_internal (GstClapperPaintable *self,
gint widget_width, gint widget_height)
{
gfloat scale_x, scale_y;
gdouble snapshot_width, snapshot_height;
GskTransform *transform = NULL;
GST_LOG_OBJECT (self, "Snapshot");
@@ -358,7 +397,63 @@ gst_clapper_paintable_snapshot_internal (GstClapperPaintable *self,
GST_CLAPPER_PAINTABLE_IMPORTER_LOCK (self);
if (self->importer) {
gst_clapper_importer_snapshot (self->importer, snapshot, width, height);
switch (self->rotation) {
case GST_VIDEO_ORIENTATION_IDENTITY:
default:
snapshot_width = width;
snapshot_height = height;
break;
case GST_VIDEO_ORIENTATION_90R:
transform = gsk_transform_rotate (transform, 90);
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (0, -width));
snapshot_width = height;
snapshot_height = width;
break;
case GST_VIDEO_ORIENTATION_180:
transform = gsk_transform_rotate (transform, 180);
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (-width, -height));
snapshot_width = width;
snapshot_height = height;
break;
case GST_VIDEO_ORIENTATION_90L:
transform = gsk_transform_rotate (transform, 270);
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (-height, 0));
snapshot_width = height;
snapshot_height = width;
break;
case GST_VIDEO_ORIENTATION_HORIZ:
transform = gsk_transform_rotate_3d (transform, 180, graphene_vec3_y_axis ());
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (-width, 0));
snapshot_width = width;
snapshot_height = height;
break;
case GST_VIDEO_ORIENTATION_VERT:
transform = gsk_transform_rotate_3d (transform, 180, graphene_vec3_x_axis ());
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (0, -height));
snapshot_width = width;
snapshot_height = height;
break;
case GST_VIDEO_ORIENTATION_UL_LR:
transform = gsk_transform_rotate (transform, 90);
transform = gsk_transform_rotate_3d (transform, 180, graphene_vec3_x_axis ());
snapshot_width = height;
snapshot_height = width;
break;
case GST_VIDEO_ORIENTATION_UR_LL:
transform = gsk_transform_rotate (transform, 90);
transform = gsk_transform_rotate_3d (transform, 180, graphene_vec3_y_axis ());
transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (-height, -width));
snapshot_width = height;
snapshot_height = width;
break;
}
if (transform) {
gtk_snapshot_transform (snapshot, transform);
gsk_transform_unref (transform);
}
gst_clapper_importer_snapshot (self->importer, snapshot, snapshot_width, snapshot_height);
} else {
GST_LOG_OBJECT (self, "No texture importer, drawing black");
gtk_snapshot_append_color (snapshot, &self->bg, &GRAPHENE_RECT_INIT (0, 0, width, height));

15
lib/gst/plugin/gstclapperpaintable.h
View File

@@ -56,6 +56,7 @@ struct _GstClapperPaintable
/* Sink properties */
gint par_n, par_d;
GstVideoOrientationMethod rotation;
/* Resize */
gboolean pending_resize;
@@ -71,11 +72,13 @@ struct _GstClapperPaintable
guint draw_id;
};
GstClapperPaintable * gst_clapper_paintable_new (void);
void gst_clapper_paintable_queue_draw (GstClapperPaintable *paintable);
void gst_clapper_paintable_set_widget (GstClapperPaintable *paintable, GtkWidget *widget);
void gst_clapper_paintable_set_importer (GstClapperPaintable *paintable, GstClapperImporter *importer);
gboolean gst_clapper_paintable_set_video_info (GstClapperPaintable *paintable, const GstVideoInfo *v_info);
void gst_clapper_paintable_set_pixel_aspect_ratio (GstClapperPaintable *paintable, gint par_n, gint par_d);
GstClapperPaintable * gst_clapper_paintable_new (void);
void gst_clapper_paintable_queue_draw (GstClapperPaintable *paintable);
void gst_clapper_paintable_set_widget (GstClapperPaintable *paintable, GtkWidget *widget);
void gst_clapper_paintable_set_importer (GstClapperPaintable *paintable, GstClapperImporter *importer);
gboolean gst_clapper_paintable_set_video_info (GstClapperPaintable *paintable, const GstVideoInfo *v_info);
void gst_clapper_paintable_set_pixel_aspect_ratio (GstClapperPaintable *paintable, gint par_n, gint par_d);
void gst_clapper_paintable_set_rotation (GstClapperPaintable *paintable, GstVideoOrientationMethod rotation);
GstVideoOrientationMethod gst_clapper_paintable_get_rotation (GstClapperPaintable *paintable);
G_END_DECLS