static void
gst_gl_transformation_reset_gl (GstGLFilter * filter)
{
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
const GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
if (transformation->vao) {
gl->DeleteVertexArrays (1, &transformation->vao);
transformation->vao = 0;
}
if (transformation->vertex_buffer) {
gl->DeleteBuffers (1, &transformation->vertex_buffer);
transformation->vertex_buffer = 0;
}
if (transformation->vbo_indices) {
gl->DeleteBuffers (1, &transformation->vbo_indices);
transformation->vbo_indices = 0;
}
if (transformation->shader) {
gst_object_unref (transformation->shader);
transformation->shader = NULL;
}
}
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_stop (GstBaseTransform * trans)
{
GstGLBaseFilter *basefilter = GST_GL_BASE_FILTER (trans);
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (trans);
/* blocking call, wait until the opengl thread has destroyed the shader */
if (basefilter->context && transformation->shader) {
gst_gl_context_del_shader (basefilter->context, transformation->shader);
transformation->shader = NULL;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans);
}
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_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLTransformation *filter = GST_GL_TRANSFORMATION (object);
switch (prop_id) {
case PROP_FOV:
filter->fov = 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;
case PROP_MVP:
if (g_value_get_boxed (value) != NULL)
filter->mvp_matrix = *((graphene_matrix_t *) g_value_get_boxed (value));
return;
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
gst_gl_transformation_build_mvp (filter);
}
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 (GST_GL_BASE_FILTER (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_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLTransformation *filter = GST_GL_TRANSFORMATION (object);
switch (prop_id) {
case PROP_FOV:
g_value_set_float (value, filter->fov);
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;
case PROP_MVP:
g_value_set_boxed (value, (gconstpointer) & filter->mvp_matrix);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_transformation_callback (gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLTransformation *transformation = GST_GL_TRANSFORMATION (filter);
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
GLfloat temp_matrix[16];
gst_gl_context_clear_shader (GST_GL_BASE_FILTER (filter)->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->ClearColor (0.f, 0.f, 0.f, 1.f);
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (transformation->shader);
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);
if (!transformation->vertex_buffer) {
transformation->attr_position =
gst_gl_shader_get_attribute_location (transformation->shader,
"position");
transformation->attr_texture =
gst_gl_shader_get_attribute_location (transformation->shader, "uv");
if (gl->GenVertexArrays) {
gl->GenVertexArrays (1, &transformation->vao);
gl->BindVertexArray (transformation->vao);
}
gl->GenBuffers (1, &transformation->vertex_buffer);
gl->GenBuffers (1, &transformation->vbo_indices);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, transformation->vbo_indices);
gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indices), indices,
GL_STATIC_DRAW);
transformation->caps_change = TRUE;
}
if (gl->GenVertexArrays)
gl->BindVertexArray (transformation->vao);
if (transformation->caps_change) {
_upload_vertices (transformation);
_bind_buffer (transformation);
if (gl->GenVertexArrays) {
gl->BindVertexArray (0);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
}
} else if (!gl->GenVertexArrays) {
_bind_buffer (transformation);
}
gl->DrawElements (GL_TRIANGLE_STRIP, 5, GL_UNSIGNED_SHORT, indices);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (transformation);
gst_gl_context_clear_shader (GST_GL_BASE_FILTER (filter)->context);
transformation->caps_change = FALSE;
}
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);
}
