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opengl: add element for transforming video geometry

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* add graphene as soft dependency for linear algebra
This commit is contained in:
Lubosz Sarnecki 2014-05-27 12:40:09 +02:00 committed by Tim-Philipp Müller
parent b2eb1b305c
commit 7e6962c95e
4 changed files with 573 additions and 4 deletions
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14
ext/gl/Makefile.am
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@ -76,6 +76,12 @@ libgstopengl_la_SOURCES = \
gstglcolorscale.h \
$(OPENGL_SOURCES)
if HAVE_GRAPHENE
libgstopengl_la_SOURCES += \
gstgltransformation.c \
gstgltransformation.h
endif
# check order of CFLAGS and LIBS, shouldn't the order be the other way around
# (like in AM_CFLAGS)?
libgstopengl_la_CFLAGS = \
@ -85,7 +91,8 @@ libgstopengl_la_CFLAGS = \
$(GST_BASE_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS) \
$(GL_CFLAGS) \
$(LIBPNG_CFLAGS)
$(LIBPNG_CFLAGS) \
$(GRAPHENE_CFLAGS)
libgstopengl_la_LIBADD = \
$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
@ -94,8 +101,9 @@ libgstopengl_la_LIBADD = \
-lgstpbutils-$(GST_API_VERSION) \
$(GL_LIBS) \
$(LIBPNG_LIBS) \
$(JPEG_LIBS) \
$(LIBM)
$(JPEG_LIBS) \
$(LIBM) \
$(GRAPHENE_LIBS)
libgstopengl_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstopengl_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)

476
ext/gl/gstgltransformation.c Normal file
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@ -0,0 +1,476 @@
/*
* GStreamer
* Copyright (C) 2014 Lubosz Sarnecki <lubosz@gmail.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:element-gltransformation
*
* Transforms video on the GPU.
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch gltestsrc ! gltransformation rotation-z=45 ! glimagesink
* ]| A pipeline to rotate by 45 degrees
* |[
* gst-launch gltestsrc ! gltransformation translation-x=0.5 ! glimagesink
* ]| Translate the video by 0.5
* |[
* gst-launch gltestsrc ! gltransformation scale-y=0.5 scale-x=0.5 ! glimagesink
* ]| Resize the video by 0.5
* |[
* gst-launch gltestsrc ! gltransformation rotation-x=-45 ortho=True ! glimagesink
* ]| Rotate the video around the X-Axis by -45° with an orthographic projection
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gl/gstglapi.h>
#include "gstgltransformation.h"
#define GST_CAT_DEFAULT gst_gl_transformation_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
PROP_0,
PROP_FOVY,
PROP_ORTHO,
PROP_TRANSLATION_X,
PROP_TRANSLATION_Y,
PROP_TRANSLATION_Z,
PROP_ROTATION_X,
PROP_ROTATION_Y,
PROP_ROTATION_Z,
PROP_SCALE_X,
PROP_SCALE_Y
};
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_transformation_debug, "gltransformation", 0, "gltransformation element");
G_DEFINE_TYPE_WITH_CODE (GstGLTransformation, gst_gl_transformation,
GST_TYPE_GL_FILTER, DEBUG_INIT);
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,
GValue * value, GParamSpec * pspec);
static gboolean gst_gl_transformation_set_caps (GstGLFilter * filter,
GstCaps * incaps, GstCaps * outcaps);
static void gst_gl_transformation_reset (GstGLFilter * filter);
static gboolean gst_gl_transformation_init_shader (GstGLFilter * filter);
static void gst_gl_transformation_callback (gpointer stuff);
static void gst_gl_transformation_build_mvp (GstGLTransformation *
transformation);
static gboolean gst_gl_transformation_filter_texture (GstGLFilter * filter,
guint in_tex, guint out_tex);
/* vertex source */
static const gchar *cube_v_src =
"attribute vec4 position; \n"
"attribute vec2 uv; \n"
"uniform mat4 mvp; \n"
"varying vec2 out_uv; \n"
"void main() \n"
"{ \n"
" gl_Position = mvp * position; \n"
" out_uv = uv; \n"
"} \n";
/* fragment source */
static const gchar *cube_f_src =
"#ifdef GL_ES \n"
" precision mediump float; \n"
"#endif \n"
"varying vec2 out_uv; \n"
"uniform sampler2D texture; \n"
"void main() \n"
"{ \n"
" gl_FragColor = texture2D (texture, out_uv);\n"
"} \n";
static void
gst_gl_transformation_class_init (GstGLTransformationClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_transformation_set_property;
gobject_class->get_property = gst_gl_transformation_get_property;
GST_GL_FILTER_CLASS (klass)->onInitFBO = gst_gl_transformation_init_shader;
GST_GL_FILTER_CLASS (klass)->onReset = gst_gl_transformation_reset;
GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_transformation_set_caps;
GST_GL_FILTER_CLASS (klass)->filter_texture =
gst_gl_transformation_filter_texture;
g_object_class_install_property (gobject_class, PROP_FOVY,
g_param_spec_float ("fovy", "Fovy", "Field of view angle in degrees",
0.0, G_MAXFLOAT, 90.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ORTHO,
g_param_spec_boolean ("ortho", "Orthographic",
"Use orthographic projection", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* Rotation */
g_object_class_install_property (gobject_class, PROP_ROTATION_X,
g_param_spec_float ("rotation-x", "X Rotation",
"Rotates the video around the X-Axis in degrees.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ROTATION_Y,
g_param_spec_float ("rotation-y", "Y Rotation",
"Rotates the video around the Y-Axis in degrees.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ROTATION_Z,
g_param_spec_float ("rotation-z", "Z Rotation",
"Rotates the video around the Z-Axis in degrees.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* Translation */
g_object_class_install_property (gobject_class, PROP_TRANSLATION_X,
g_param_spec_float ("translation-x", "X Translation",
"Translates the video at the X-Axis.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TRANSLATION_Y,
g_param_spec_float ("translation-y", "Y Translation",
"Translates the video at the Y-Axis.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TRANSLATION_Z,
g_param_spec_float ("translation-z", "Z Translation",
"Translates the video at the Z-Axis.",
-G_MAXFLOAT, G_MAXFLOAT, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* Scale */
g_object_class_install_property (gobject_class, PROP_SCALE_X,
g_param_spec_float ("scale-x", "X Scale",
"Scale multiplierer for the X-Axis.",
0.0, G_MAXFLOAT, 1.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SCALE_Y,
g_param_spec_float ("scale-y", "Y Scale",
"Scale multiplierer for the Y-Axis.",
0.0, G_MAXFLOAT, 1.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "OpenGL transformation filter",
"Filter/Effect/Video", "Transform video on the GPU",
"Lubosz Sarnecki <lubosz@gmail.com>");
}
static void
gst_gl_transformation_init (GstGLTransformation * filter)
{
filter->shader = NULL;
filter->fovy = 90;
filter->aspect = 0;
filter->znear = 0.1;
filter->zfar = 100;
filter->xscale = 1.0;
filter->yscale = 1.0;
filter->in_tex = 0;
gst_gl_transformation_build_mvp (filter);
}
static void
gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
{
graphene_point3d_t translation_vector =
GRAPHENE_POINT3D_INIT (transformation->xtranslation,
transformation->ytranslation,
transformation->ztranslation);
graphene_matrix_t model_matrix;
graphene_matrix_t projection_matrix;
graphene_matrix_t view_matrix;
graphene_matrix_t vp_matrix;
graphene_vec3_t eye;
graphene_vec3_t center;
graphene_vec3_t up;
graphene_vec3_init (&eye, 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);
graphene_matrix_init_rotate (&model_matrix,
transformation->xrotation, graphene_vec3_x_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->yrotation, graphene_vec3_y_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->zrotation, graphene_vec3_z_axis ());
graphene_matrix_scale (&model_matrix,
transformation->xscale, transformation->yscale, 1.0f);
graphene_matrix_translate (&model_matrix, &translation_vector);
if (transformation->ortho) {
graphene_matrix_init_ortho (&projection_matrix,
-transformation->aspect, transformation->aspect,
-1, 1, transformation->znear, transformation->zfar);
} else {
graphene_matrix_init_perspective (&projection_matrix,
transformation->fovy,
transformation->aspect, transformation->znear, transformation->zfar);
}
graphene_matrix_init_look_at (&view_matrix, &eye, &center, &up);
graphene_matrix_multiply (&projection_matrix, &view_matrix, &vp_matrix);
graphene_matrix_multiply (&vp_matrix, &model_matrix,
&transformation->mvp_matrix);
}
static void
gst_gl_transformation_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLTransformation *filter = GST_GL_TRANSFORMATION (object);
switch (prop_id) {
case PROP_FOVY:
filter->fovy = g_value_get_float (value);
break;
case PROP_ORTHO:
filter->ortho = g_value_get_boolean (value);
break;
case PROP_TRANSLATION_X:
filter->xtranslation = g_value_get_float (value);
break;
case PROP_TRANSLATION_Y:
filter->ytranslation = g_value_get_float (value);
break;
case PROP_TRANSLATION_Z:
filter->ztranslation = g_value_get_float (value);
break;
case PROP_ROTATION_X:
filter->xrotation = g_value_get_float (value);
break;
case PROP_ROTATION_Y:
filter->yrotation = g_value_get_float (value);
break;
case PROP_ROTATION_Z:
filter->zrotation = g_value_get_float (value);
break;
case PROP_SCALE_X:
filter->xscale = g_value_get_float (value);
break;
case PROP_SCALE_Y:
filter->yscale = g_value_get_float (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
gst_gl_transformation_build_mvp (filter);
}
static void
gst_gl_transformation_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLTransformation *filter = GST_GL_TRANSFORMATION (object);
switch (prop_id) {
case PROP_FOVY:
g_value_set_float (value, filter->fovy);
break;
case PROP_ORTHO:
g_value_set_boolean (value, filter->ortho);
break;
case PROP_TRANSLATION_X:
g_value_set_float (value, filter->xtranslation);
break;
case PROP_TRANSLATION_Y:
g_value_set_float (value, filter->ytranslation);
break;
case PROP_TRANSLATION_Z:
g_value_set_float (value, filter->ztranslation);
break;
case PROP_ROTATION_X:
g_value_set_float (value, filter->xrotation);
break;
case PROP_ROTATION_Y:
g_value_set_float (value, filter->yrotation);
break;
case PROP_ROTATION_Z:
g_value_set_float (value, filter->zrotation);
break;
case PROP_SCALE_X:
g_value_set_float (value, filter->xscale);
break;
case PROP_SCALE_Y:
g_value_set_float (value, filter->yscale);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_transformation_set_caps (GstGLFilter * filter, GstCaps * incaps,
GstCaps * outcaps)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
transformation->aspect =
(gdouble) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
(gdouble) GST_VIDEO_INFO_HEIGHT (&filter->out_info);
gst_gl_transformation_build_mvp (transformation);
return TRUE;
}
static void
gst_gl_transformation_reset (GstGLFilter * filter)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
/* blocking call, wait until the opengl thread has destroyed the shader */
if (transformation->shader)
gst_gl_context_del_shader (filter->context, transformation->shader);
transformation->shader = NULL;
}
static gboolean
gst_gl_transformation_init_shader (GstGLFilter * filter)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
if (gst_gl_context_get_gl_api (filter->context)) {
/* blocking call, wait until the opengl thread has compiled the shader */
return gst_gl_context_gen_shader (filter->context, cube_v_src, cube_f_src,
&transformation->shader);
}
return TRUE;
}
static gboolean
gst_gl_transformation_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
transformation->in_tex = in_tex;
/* blocking call, use a FBO */
gst_gl_context_use_fbo_v2 (filter->context,
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
filter->fbo, filter->depthbuffer,
out_tex, gst_gl_transformation_callback, (gpointer) transformation);
return TRUE;
}
static void
gst_gl_transformation_callback (gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
/* *INDENT-OFF* */
const GLfloat positions[] = {
-transformation->aspect, 1.0, 0.0, 1.0,
transformation->aspect, 1.0, 0.0, 1.0,
transformation->aspect, -1.0, 0.0, 1.0,
-transformation->aspect, -1.0, 0.0, 1.0,
};
const GLfloat texture_coordinates[] = {
0.0, 1.0,
1.0, 1.0,
1.0, 0.0,
0.0, 0.0,
};
/* *INDENT-ON* */
GLushort indices[] = { 0, 1, 2, 3, 0 };
GLfloat temp_matrix[16];
GLint attr_position_loc = 0;
GLint attr_texture_loc = 0;
gst_gl_context_clear_shader (filter->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->ClearColor (0.f, 0.f, 0.f, 0.f);
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (transformation->shader);
attr_position_loc =
gst_gl_shader_get_attribute_location (transformation->shader, "position");
attr_texture_loc =
gst_gl_shader_get_attribute_location (transformation->shader, "uv");
/* Load the vertex position */
gl->VertexAttribPointer (attr_position_loc, 4, GL_FLOAT,
GL_FALSE, 0, positions);
/* Load the texture coordinate */
gl->VertexAttribPointer (attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 0, texture_coordinates);
gl->EnableVertexAttribArray (attr_position_loc);
gl->EnableVertexAttribArray (attr_texture_loc);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, transformation->in_tex);
gst_gl_shader_set_uniform_1i (transformation->shader, "texture", 0);
graphene_matrix_to_float (&transformation->mvp_matrix, temp_matrix);
gst_gl_shader_set_uniform_matrix_4fv (transformation->shader, "mvp",
1, GL_FALSE, temp_matrix);
gl->DrawElements (GL_TRIANGLE_STRIP, 5, GL_UNSIGNED_SHORT, indices);
gl->DisableVertexAttribArray (attr_position_loc);
gl->DisableVertexAttribArray (attr_texture_loc);
gst_gl_context_clear_shader (filter->context);
}

77
ext/gl/gstgltransformation.h Normal file
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@ -0,0 +1,77 @@
/*
* GStreamer
* Copyright (C) 2014 Lubosz Sarnecki <lubosz@gmail.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.
*/
#ifndef _GST_GL_TRANSFORMATION_H_
#define _GST_GL_TRANSFORMATION_H_
#include <gst/gl/gstglfilter.h>
#include <graphene-1.0/graphene.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_TRANSFORMATION (gst_gl_transformation_get_type())
#define GST_GL_TRANSFORMATION(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_TRANSFORMATION,GstGLTransformation))
#define GST_IS_GL_TRANSFORMATION(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_TRANSFORMATION))
#define GST_GL_TRANSFORMATION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_TRANSFORMATION,GstGLTransformationClass))
#define GST_IS_GL_TRANSFORMATION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_TRANSFORMATION))
#define GST_GL_TRANSFORMATION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_TRANSFORMATION,GstGLTransformationClass))
typedef struct _GstGLTransformation GstGLTransformation;
typedef struct _GstGLTransformationClass GstGLTransformationClass;
struct _GstGLTransformation
{
GstGLFilter filter;
GstGLShader *shader;
guint in_tex;
gfloat xrotation;
gfloat yrotation;
gfloat zrotation;
gfloat xscale;
gfloat yscale;
gfloat xtranslation;
gfloat ytranslation;
gfloat ztranslation;
/* perspective */
gfloat fovy;
gfloat aspect;
gfloat znear;
gfloat zfar;
gboolean ortho;
graphene_matrix_t mvp_matrix;
};
struct _GstGLTransformationClass
{
GstGLFilterClass filter_class;
};
GType gst_gl_transformation_get_type (void);
G_END_DECLS
#endif /* _GST_GL_TRANSFORMATION_H_ */

10
ext/gl/gstopengl.c
View file

@ -48,6 +48,9 @@
#include "gstglfiltercube.h"
#include "gstgleffects.h"
#include "gstglcolorscale.h"
#if HAVE_GRAPHENE
#include "gstgltransformation.h"
#endif
#if GST_GL_HAVE_OPENGL
#include "gstgltestsrc.h"
@ -97,7 +100,12 @@ plugin_init (GstPlugin * plugin)
GST_RANK_NONE, GST_TYPE_GL_FILTER_CUBE)) {
return FALSE;
}
#if HAVE_GRAPHENE
if (!gst_element_register (plugin, "gltransformation",
GST_RANK_NONE, GST_TYPE_GL_TRANSFORMATION)) {
return FALSE;
}
#endif
if (!gst_element_register (plugin, "gleffects",
GST_RANK_NONE, gst_gl_effects_get_type ())) {
return FALSE;