static gboolean
gst_gl_filter_glass_filter (GstGLFilter * filter, GstGLBuffer * inbuf,
GstGLBuffer * outbuf)
{
gpointer glass_filter = GST_GL_FILTER_GLASS (filter);
GST_GL_FILTER_GLASS (glass_filter)->timestamp = GST_BUFFER_TIMESTAMP (inbuf);
//blocking call, use a FBO
gst_gl_display_use_fbo (filter->display, filter->width, filter->height,
filter->fbo, filter->depthbuffer, outbuf->texture,
gst_gl_filter_glass_callback, inbuf->width, inbuf->height, inbuf->texture,
80, (gdouble) filter->width / (gdouble) filter->height, 1.0, 5000.0,
GST_GL_DISPLAY_PROJECTION_PERSPECTIVE, (gpointer) glass_filter);
return TRUE;
}
static void
gst_gl_filter_glass_reset (GstGLFilter * filter)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
//blocking call, wait the opengl thread has destroyed the shader
gst_gl_display_del_shader (filter->display, glass_filter->shader);
}
static gboolean
gst_gl_filter_glass_init_shader (GstGLFilter * filter)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
//blocking call, wait the opengl thread has compiled the shader
return gst_gl_display_gen_shader (filter->display, 0, glass_fragment_source,
&glass_filter->shader);
}
//opengl scene, params: input texture (not the output filter->texture)
static void
gst_gl_filter_glass_callback (gpointer stuff)
{
static gint64 start_time = 0;
gfloat rotation;
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (stuff);
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
gint width = GST_VIDEO_INFO_WIDTH (&filter->out_info);
gint height = GST_VIDEO_INFO_HEIGHT (&filter->out_info);
guint texture = glass_filter->in_tex;
if (start_time == 0)
start_time = get_time ();
else {
gint64 time_left =
(glass_filter->timestamp / 1000) - (get_time () - start_time);
time_left -= 1000000 / 25;
if (time_left > 2000) {
GST_LOG ("escape");
return;
}
}
gst_gl_shader_use (glass_filter->passthrough_shader);
gst_gl_filter_glass_draw_background_gradient (glass_filter);
//Rotation
if (start_time != 0) {
gint64 time_passed = get_time () - start_time;
rotation = sin (time_passed / 1200000.0) * 45.0f;
} else {
rotation = 0.0f;
}
gl->Enable (GL_BLEND);
gl->BlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gst_gl_shader_use (glass_filter->shader);
//Reflection
gst_gl_filter_glass_draw_video_plane (filter, width, height, texture,
0.0f, 2.0f, 0.3f, 0.0f, TRUE, rotation);
//Main video
gst_gl_filter_glass_draw_video_plane (filter, width, height, texture,
0.0f, 0.0f, 1.0f, 1.0f, FALSE, rotation);
gst_gl_context_clear_shader (GST_GL_BASE_FILTER (filter)->context);
gl->Disable (GL_BLEND);
}
static void
gst_gl_filter_glass_draw_video_plane (GstGLFilter * filter,
gint width, gint height, guint texture,
gfloat center_x, gfloat center_y,
gfloat start_alpha, gfloat stop_alpha, gboolean reversed, gfloat rotation)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
gfloat topy = reversed ? center_y - 1.0f : center_y + 1.0f;
gfloat bottomy = reversed ? center_y + 1.0f : center_y - 1.0f;
/* *INDENT-OFF* */
gfloat mesh[] = {
/*| Vertex |TexCoord0| Colour |*/
center_x-1.6, topy, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0, start_alpha,
center_x+1.6, topy, 0.0, 1.0, 1.0, 1.0, 1.0, 1.0, start_alpha,
center_x+1.6, bottomy, 0.0, 1.0, 0.0, 1.0, 1.0, 1.0, stop_alpha,
center_x-1.6, bottomy, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, stop_alpha,
};
/* *INDENT-ON* */
GLushort indices[] = {
0, 1, 2,
0, 2, 3
};
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (glass_filter->shader, "tex", 0);
gst_gl_shader_set_uniform_1f (glass_filter->shader, "yrot", rotation);
gst_gl_shader_set_uniform_1f (glass_filter->shader, "aspect",
(gfloat) width / (gfloat) height);
gl->ClientActiveTexture (GL_TEXTURE0);
gl->EnableClientState (GL_TEXTURE_COORD_ARRAY);
gl->EnableClientState (GL_VERTEX_ARRAY);
gl->EnableClientState (GL_COLOR_ARRAY);
gl->VertexPointer (3, GL_FLOAT, 9 * sizeof (gfloat), mesh);
gl->TexCoordPointer (2, GL_FLOAT, 9 * sizeof (gfloat), &mesh[3]);
gl->ColorPointer (4, GL_FLOAT, 9 * sizeof (gfloat), &mesh[5]);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
gl->DisableClientState (GL_TEXTURE_COORD_ARRAY);
gl->DisableClientState (GL_VERTEX_ARRAY);
gl->DisableClientState (GL_COLOR_ARRAY);
}
static gboolean
gst_gl_filter_glass_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
glass_filter->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_filter_glass_callback, (gpointer) glass_filter);
return TRUE;
}
//opengl scene, params: input texture (not the output filter->texture)
static void
gst_gl_filter_glass_callback (gint width, gint height, guint texture,
gpointer stuff)
{
static gint64 start_time = 0;
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (stuff);
if (start_time == 0)
start_time = get_time ();
else {
gint64 time_left =
(glass_filter->timestamp / 1000) - (get_time () - start_time);
time_left -= 1000000 / 25;
if (time_left > 2000) {
GST_LOG ("escape");
return;
}
}
glTranslatef (0.0f, 2.0f, -3.0f);
gst_gl_filter_glass_draw_background_gradient ();
//Rotation
if (start_time != 0) {
gint64 time_passed = get_time () - start_time;
glRotated (sin (time_passed / 1200000.0) * 45.0, 0.0, 1.0, 0.0);
}
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//Reflection
gst_gl_filter_glass_draw_video_plane (filter, width, height, texture,
0.0f, 0.0f, 0.3f, 0.0f, TRUE);
//Main video
gst_gl_filter_glass_draw_video_plane (filter, width, height, texture,
0.0f, -2.0f, 1.0f, 1.0f, FALSE);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
glDisable (GL_BLEND);
}
static void
gst_gl_filter_glass_draw_video_plane (GstGLFilter * filter,
gint width, gint height, guint texture,
gfloat center_x, gfloat center_y,
gfloat start_alpha, gfloat stop_alpha, gboolean reversed)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
gfloat topy;
gfloat bottomy;
if (reversed) {
topy = center_y - 1.0f;
bottomy = center_y + 1.0f;
} else {
topy = center_y + 1.0f;
bottomy = center_y - 1.0f;
}
gst_gl_shader_use (glass_filter->shader);
glActiveTextureARB (GL_TEXTURE0_ARB);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (glass_filter->shader, "tex", 0);
gst_gl_shader_set_uniform_1f (glass_filter->shader, "width", (gfloat) width);
gst_gl_shader_set_uniform_1f (glass_filter->shader, "height",
(gfloat) height);
glBegin (GL_QUADS);
glColor4f (1.0f, 1.0f, 1.0f, start_alpha);
glTexCoord2i (0, height);
glVertex2f (center_x - 1.6f, topy);
glTexCoord2i (width, height);
glVertex2f (center_x + 1.6f, topy);
glColor4f (1.0, 1.0, 1.0, stop_alpha);
glTexCoord2i (width, 0);
glVertex2f (center_x + 1.6f, bottomy);
glTexCoord2i (0, 0);
glVertex2f (center_x - 1.6f, bottomy);
glEnd ();
gst_gl_shader_use (0);
}
static gboolean
gst_gl_filter_glass_reset (GstBaseTransform * trans)
{
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (trans);
//blocking call, wait the opengl thread has destroyed the shader
if (glass_filter->shader)
gst_gl_context_del_shader (GST_GL_BASE_FILTER (trans)->context,
glass_filter->shader);
glass_filter->shader = NULL;
if (glass_filter->passthrough_shader)
gst_gl_context_del_shader (GST_GL_BASE_FILTER (trans)->context,
glass_filter->passthrough_shader);
glass_filter->passthrough_shader = NULL;
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans);
}
static gboolean
gst_gl_filter_glass_init_shader (GstGLFilter * filter)
{
gboolean ret;
GstGLFilterGlass *glass_filter = GST_GL_FILTER_GLASS (filter);
//blocking call, wait the opengl thread has compiled the shader
ret =
gst_gl_context_gen_shader (GST_GL_BASE_FILTER (filter)->context,
glass_vertex_source, glass_fragment_source, &glass_filter->shader);
if (ret)
ret =
gst_gl_context_gen_shader (GST_GL_BASE_FILTER (filter)->context,
passthrough_vertex, passthrough_fragment,
&glass_filter->passthrough_shader);
return ret;
}
