static GstGLShader *
gst_gl_deinterlace_get_fragment_shader (GstGLFilter * filter,
const gchar * shader_name, const gchar * shader_source)
{
GstGLShader *shader = NULL;
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
GstGLContext *context = GST_GL_BASE_FILTER (filter)->context;
shader = g_hash_table_lookup (deinterlace_filter->shaderstable, shader_name);
if (!shader) {
GError *error = NULL;
if (!(shader = gst_gl_shader_new_link_with_stages (context, &error,
gst_glsl_stage_new_default_vertex (context),
gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
shader_source), NULL))) {
GST_ELEMENT_ERROR (deinterlace_filter, RESOURCE, NOT_FOUND,
("Failed to initialize %s shader", shader_name), (NULL));
}
filter->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (shader, "a_position");
filter->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (shader, "a_texcoord");
}
g_hash_table_insert (deinterlace_filter->shaderstable, (gchar *) shader_name,
shader);
return shader;
}
static gboolean
gst_gl_deinterlace_init_shader (GstGLFilter * filter)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
//blocking call, wait the opengl thread has compiled the shader
return gst_gl_context_gen_shader (GST_GL_BASE_FILTER (filter)->context, 0,
greedyh_fragment_source, &deinterlace_filter->shader);
}
static gboolean
gst_gl_deinterlace_start (GstBaseTransform * trans)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (trans);
deinterlace_filter->shaderstable = g_hash_table_new (g_str_hash, g_str_equal);
return GST_BASE_TRANSFORM_CLASS (parent_class)->start (trans);
}
//opengl scene, params: input texture (not the output filter->texture)
static void
gst_gl_deinterlace_callback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (stuff);
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLBuffer *gl_buffer_prev = deinterlace_filter->gl_buffer_prev;
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (deinterlace_filter->shader);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
if (gl_buffer_prev) {
glActiveTexture (GL_TEXTURE1_ARB);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "tex_prev", 1);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, gl_buffer_prev->texture);
}
glActiveTexture (GL_TEXTURE0_ARB);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "tex", 0);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "max_comb",
5.0f / 255.0f);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "motion_threshold",
25.0f / 255.0f);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "motion_sense",
30.0f / 255.0f);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "width",
filter->width);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "height",
filter->height);
glBegin (GL_QUADS);
glMultiTexCoord2iARB (GL_TEXTURE0_ARB, 0, 0);
glMultiTexCoord2iARB (GL_TEXTURE1_ARB, 0, 0);
glVertex2i (-1, -1);
glMultiTexCoord2iARB (GL_TEXTURE0_ARB, width, 0);
glMultiTexCoord2iARB (GL_TEXTURE1_ARB, width, 0);
glVertex2i (1, -1);
glMultiTexCoord2iARB (GL_TEXTURE0_ARB, width, height);
glMultiTexCoord2iARB (GL_TEXTURE1_ARB, width, height);
glVertex2i (1, 1);
glMultiTexCoord2iARB (GL_TEXTURE0_ARB, 0, height);
glMultiTexCoord2iARB (GL_TEXTURE1_ARB, 0, height);
glVertex2i (-1, 1);
glEnd ();
glDisable (GL_TEXTURE_RECTANGLE_ARB);
}
static gboolean
gst_gl_deinterlace_filter (GstGLFilter * filter, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
gst_gl_filter_filter_texture (filter, inbuf, outbuf);
gst_buffer_replace (&deinterlace_filter->prev_buffer, inbuf);
return TRUE;
}
static gboolean
gst_gl_deinterlace_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
//blocking call, use a FBO
gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
gst_gl_deinterlace_callback, deinterlace_filter);
return TRUE;
}
static void
gst_gl_deinterlace_reset (GstGLFilter * filter)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
if (deinterlace_filter->gl_buffer_prev) {
gst_buffer_unref (GST_BUFFER_CAST (deinterlace_filter->gl_buffer_prev));
deinterlace_filter->gl_buffer_prev = NULL;
}
//blocking call, wait the opengl thread has destroyed the shader
gst_gl_display_del_shader (filter->display, deinterlace_filter->shader);
}
static gboolean
gst_gl_deinterlace_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex,
GstGLMemory * out_tex)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
//blocking call, use a FBO
gst_gl_filter_render_to_target (filter, in_tex, out_tex,
deinterlace_filter->deinterlacefunc, deinterlace_filter);
return TRUE;
}
static gboolean
gst_gl_deinterlace_greedyh_callback (GstGLFilter * filter, GstGLMemory * in_tex,
gpointer user_data)
{
GstGLShader *shader;
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
GstGLContext *context = GST_GL_BASE_FILTER (filter)->context;
GstGLFuncs *gl = context->gl_vtable;
shader =
gst_gl_deinterlace_get_fragment_shader (filter, "greedhy",
greedyh_fragment_source);
if (!shader)
return FALSE;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
if (G_LIKELY (deinterlace_filter->prev_tex != NULL)) {
gl->ActiveTexture (GL_TEXTURE1);
gst_gl_shader_set_uniform_1i (shader, "tex_prev", 1);
gl->BindTexture (GL_TEXTURE_2D,
gst_gl_memory_get_texture_id (deinterlace_filter->prev_tex));
}
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, gst_gl_memory_get_texture_id (in_tex));
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "max_comb", 5.0f / 255.0f);
gst_gl_shader_set_uniform_1f (shader, "motion_threshold", 25.0f / 255.0f);
gst_gl_shader_set_uniform_1f (shader, "motion_sense", 30.0f / 255.0f);
gst_gl_shader_set_uniform_1f (shader, "width",
GST_VIDEO_INFO_WIDTH (&filter->out_info));
gst_gl_shader_set_uniform_1f (shader, "height",
GST_VIDEO_INFO_HEIGHT (&filter->out_info));
gst_gl_filter_draw_fullscreen_quad (filter);
/* we keep the previous buffer around so this is safe */
deinterlace_filter->prev_tex = in_tex;
return TRUE;
}
static gboolean
gst_gl_deinterlace_reset (GstBaseTransform * trans)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (trans);
gst_buffer_replace (&deinterlace_filter->prev_buffer, NULL);
//blocking call, wait the opengl thread has destroyed the shader
if (deinterlace_filter->shader)
gst_gl_context_del_shader (GST_GL_BASE_FILTER (trans)->context,
deinterlace_filter->shader);
deinterlace_filter->shader = NULL;
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans);
}
static void
gst_gl_deinterlace_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLDeinterlace *filter = GST_GL_DEINTERLACE (object);
switch (prop_id) {
case PROP_METHOD:
g_value_set_enum (value, filter->current_method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_deinterlace_filter (GstGLFilter * filter, GstGLBuffer * inbuf,
GstGLBuffer * outbuf)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (filter);
//blocking call, use a FBO
gst_gl_display_use_fbo (filter->display, filter->width, filter->height,
filter->fbo, filter->depthbuffer, outbuf->texture,
gst_gl_deinterlace_callback, inbuf->width, inbuf->height,
inbuf->texture, 0, filter->width, 0, filter->height,
GST_GL_DISPLAY_PROJECTION_ORTHO2D, (gpointer) deinterlace_filter);
if (deinterlace_filter->gl_buffer_prev)
gst_buffer_unref (GST_BUFFER_CAST (deinterlace_filter->gl_buffer_prev));
deinterlace_filter->gl_buffer_prev =
GST_GL_BUFFER (gst_buffer_ref (GST_BUFFER_CAST (inbuf)));
return TRUE;
}
static gboolean
gst_gl_deinterlace_reset (GstBaseTransform * trans)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (trans);
gst_buffer_replace (&deinterlace_filter->prev_buffer, NULL);
//blocking call, wait the opengl thread has destroyed the shader
if (deinterlace_filter->shaderstable) {
/* release shaders in the gl thread */
g_hash_table_foreach (deinterlace_filter->shaderstable,
gst_gl_deinterlace_ghash_func_clean, deinterlace_filter);
/* clean the htable without calling values destructors
* because shaders have been released in the glthread
* through the foreach func */
g_hash_table_unref (deinterlace_filter->shaderstable);
deinterlace_filter->shaderstable = NULL;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (trans);
}
//opengl scene, params: input texture (not the output filter->texture)
static void
gst_gl_deinterlace_callback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLDeinterlace *deinterlace_filter = GST_GL_DEINTERLACE (stuff);
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
guint temp;
GLfloat verts[] = { -1.0, -1.0,
1.0, -1.0,
1.0, 1.0,
-1.0, 1.0
};
GLfloat texcoords0[] = { 0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f
};
GLfloat texcoords1[] = { 0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f
};
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (deinterlace_filter->shader);
if (G_UNLIKELY (deinterlace_filter->prev_tex == 0)) {
gst_gl_context_gen_texture (GST_GL_BASE_FILTER (filter)->context,
&deinterlace_filter->prev_tex,
GST_VIDEO_INFO_FORMAT (&filter->out_info),
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info));
} else {
gl->ActiveTexture (GL_TEXTURE1);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "tex_prev", 1);
gl->BindTexture (GL_TEXTURE_2D, deinterlace_filter->prev_tex);
}
gl->ActiveTexture (GL_TEXTURE0);
gst_gl_shader_set_uniform_1i (deinterlace_filter->shader, "tex", 0);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "max_comb",
5.0f / 255.0f);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "motion_threshold",
25.0f / 255.0f);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "motion_sense",
30.0f / 255.0f);
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "width",
GST_VIDEO_INFO_WIDTH (&filter->out_info));
gst_gl_shader_set_uniform_1f (deinterlace_filter->shader, "height",
GST_VIDEO_INFO_HEIGHT (&filter->out_info));
gl->ClientActiveTexture (GL_TEXTURE0);
gl->EnableClientState (GL_TEXTURE_COORD_ARRAY);
gl->EnableClientState (GL_VERTEX_ARRAY);
gl->VertexPointer (2, GL_FLOAT, 0, &verts);
gl->TexCoordPointer (2, GL_FLOAT, 0, &texcoords0);
gl->ClientActiveTexture (GL_TEXTURE1);
gl->EnableClientState (GL_TEXTURE_COORD_ARRAY);
gl->TexCoordPointer (2, GL_FLOAT, 0, &texcoords1);
gl->DrawArrays (GL_TRIANGLE_FAN, 0, 4);
gl->DisableClientState (GL_VERTEX_ARRAY);
gl->DisableClientState (GL_TEXTURE_COORD_ARRAY);
gl->ClientActiveTexture (GL_TEXTURE0);
gl->DisableClientState (GL_TEXTURE_COORD_ARRAY);
if (texture == filter->in_tex_id) {
temp = filter->in_tex_id;
filter->in_tex_id = deinterlace_filter->prev_tex;
deinterlace_filter->prev_tex = temp;
} else {
deinterlace_filter->prev_tex = texture;
}
}
