mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
344 lines
11 KiB
C
344 lines
11 KiB
C
|
/*
|
||
|
* gloverlaycompositor element
|
||
|
* Copyrithg (C) 2018 Matthew Waters <matthew@centricular.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-glcompositoroverlay
|
||
|
* @title: glcompositoroverlay
|
||
|
*
|
||
|
*/
|
||
|
#ifdef HAVE_CONFIG_H
|
||
|
#include "config.h"
|
||
|
#endif
|
||
|
|
||
|
#include <gst/gl/gstglfuncs.h>
|
||
|
#include <gst/video/video.h>
|
||
|
|
||
|
#include "gstgloverlaycompositorelement.h"
|
||
|
|
||
|
enum
|
||
|
{
|
||
|
PROP_0,
|
||
|
PROP_LAST,
|
||
|
};
|
||
|
|
||
|
#define GST_CAT_DEFAULT gst_gl_overlay_compositor_element_debug
|
||
|
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
|
||
|
|
||
|
#define DEBUG_INIT \
|
||
|
GST_DEBUG_CATEGORY_INIT (gst_gl_overlay_compositor_element_debug, "gloverlaycompositorelement", 0, "gloverlaycompositor element");
|
||
|
#define gst_gl_overlay_compositor_element_parent_class parent_class
|
||
|
G_DEFINE_TYPE_WITH_CODE (GstGLOverlayCompositorElement,
|
||
|
gst_gl_overlay_compositor_element, GST_TYPE_GL_FILTER, DEBUG_INIT);
|
||
|
|
||
|
static GstStaticPadTemplate overlay_sink_pad_template =
|
||
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
||
|
GST_PAD_SINK,
|
||
|
GST_PAD_ALWAYS,
|
||
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
|
||
|
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY ","
|
||
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } ; "
|
||
|
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } ; "
|
||
|
GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY",
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } "));
|
||
|
|
||
|
static GstStaticPadTemplate overlay_src_pad_template =
|
||
|
GST_STATIC_PAD_TEMPLATE ("src",
|
||
|
GST_PAD_SRC,
|
||
|
GST_PAD_ALWAYS,
|
||
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
|
||
|
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY ","
|
||
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } ; "
|
||
|
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } ; "
|
||
|
GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY",
|
||
|
"RGBA") ", texture-target=(string) { 2D, rectangle } "));
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_propose_allocation (GstBaseTransform * trans,
|
||
|
GstQuery * decide_query, GstQuery * query);
|
||
|
static GstFlowReturn _oce_prepare_output_buffer (GstBaseTransform * bt,
|
||
|
GstBuffer * buffer, GstBuffer ** outbuf);
|
||
|
|
||
|
static gboolean gst_gl_overlay_compositor_element_gl_start (GstGLBaseFilter *
|
||
|
base);
|
||
|
static void gst_gl_overlay_compositor_element_gl_stop (GstGLBaseFilter * base);
|
||
|
|
||
|
static GstCaps *_oce_transform_internal_caps (GstGLFilter *
|
||
|
filter, GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
|
||
|
static gboolean gst_gl_overlay_compositor_element_filter (GstGLFilter * filter,
|
||
|
GstBuffer * inbuf, GstBuffer * outbuf);
|
||
|
static gboolean gst_gl_overlay_compositor_element_filter_texture (GstGLFilter *
|
||
|
filter, GstGLMemory * in_tex, GstGLMemory * out_tex);
|
||
|
static gboolean gst_gl_overlay_compositor_element_callback (GstGLFilter *
|
||
|
filter, GstGLMemory * in_tex, gpointer stuff);
|
||
|
|
||
|
static void
|
||
|
gst_gl_overlay_compositor_element_class_init (GstGLOverlayCompositorElementClass
|
||
|
* klass)
|
||
|
{
|
||
|
GstElementClass *element_class;
|
||
|
|
||
|
element_class = GST_ELEMENT_CLASS (klass);
|
||
|
|
||
|
gst_element_class_set_metadata (element_class,
|
||
|
"OpenGL overlaying filter", "Filter/Effect",
|
||
|
"Flatten a stream containing GstVideoOverlayCompositionMeta",
|
||
|
"<matthew@centricular.com>");
|
||
|
|
||
|
gst_element_class_add_static_pad_template (element_class,
|
||
|
&overlay_src_pad_template);
|
||
|
gst_element_class_add_static_pad_template (element_class,
|
||
|
&overlay_sink_pad_template);
|
||
|
|
||
|
GST_BASE_TRANSFORM_CLASS (klass)->passthrough_on_same_caps = TRUE;
|
||
|
GST_BASE_TRANSFORM_CLASS (klass)->propose_allocation =
|
||
|
gst_gl_overlay_compositor_element_propose_allocation;
|
||
|
GST_BASE_TRANSFORM_CLASS (klass)->prepare_output_buffer =
|
||
|
_oce_prepare_output_buffer;
|
||
|
|
||
|
GST_GL_FILTER_CLASS (klass)->filter =
|
||
|
gst_gl_overlay_compositor_element_filter;
|
||
|
GST_GL_FILTER_CLASS (klass)->filter_texture =
|
||
|
gst_gl_overlay_compositor_element_filter_texture;
|
||
|
GST_GL_FILTER_CLASS (klass)->transform_internal_caps =
|
||
|
_oce_transform_internal_caps;
|
||
|
|
||
|
GST_GL_BASE_FILTER_CLASS (klass)->gl_start =
|
||
|
gst_gl_overlay_compositor_element_gl_start;
|
||
|
GST_GL_BASE_FILTER_CLASS (klass)->gl_stop =
|
||
|
gst_gl_overlay_compositor_element_gl_stop;
|
||
|
GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api =
|
||
|
GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_gl_overlay_compositor_element_init (GstGLOverlayCompositorElement *
|
||
|
overlay_compositor_element)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static GstCaps *
|
||
|
_oce_transform_internal_caps (GstGLFilter * filter,
|
||
|
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
|
||
|
{
|
||
|
GstCaps *ret;
|
||
|
|
||
|
/* add/remove the composition overlay meta as necessary */
|
||
|
if (direction == GST_PAD_SRC) {
|
||
|
ret = gst_gl_overlay_compositor_add_caps (gst_caps_copy (caps));
|
||
|
} else {
|
||
|
guint i, n;
|
||
|
GstCaps *removed;
|
||
|
|
||
|
ret = gst_caps_copy (caps);
|
||
|
removed = gst_caps_copy (caps);
|
||
|
n = gst_caps_get_size (removed);
|
||
|
for (i = 0; i < n; i++) {
|
||
|
GstCapsFeatures *feat = gst_caps_get_features (removed, i);
|
||
|
|
||
|
if (feat) {
|
||
|
feat = gst_caps_features_copy (feat);
|
||
|
|
||
|
if (gst_caps_features_contains (feat,
|
||
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION)) {
|
||
|
/* prefer the passthrough case */
|
||
|
gst_caps_features_remove (feat,
|
||
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
|
||
|
gst_caps_set_features (removed, i, feat);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
ret = gst_caps_merge (ret, removed);
|
||
|
}
|
||
|
|
||
|
GST_DEBUG_OBJECT (filter, "meta modifications returned caps %" GST_PTR_FORMAT,
|
||
|
ret);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_propose_allocation (GstBaseTransform * trans,
|
||
|
GstQuery * decide_query, GstQuery * query)
|
||
|
{
|
||
|
GstStructure *allocation_meta = NULL;
|
||
|
guint width = 0, height = 0;
|
||
|
|
||
|
if (!GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans,
|
||
|
decide_query, query))
|
||
|
return FALSE;
|
||
|
|
||
|
if ((width == 0 || height == 0) && decide_query) {
|
||
|
GstCaps *decide_caps;
|
||
|
gst_query_parse_allocation (decide_query, &decide_caps, NULL);
|
||
|
|
||
|
if (decide_caps) {
|
||
|
GstVideoInfo vinfo;
|
||
|
|
||
|
if (gst_video_info_from_caps (&vinfo, decide_caps)) {
|
||
|
width = GST_VIDEO_INFO_WIDTH (&vinfo);
|
||
|
height = GST_VIDEO_INFO_HEIGHT (&vinfo);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if ((width == 0 || height == 0) && query) {
|
||
|
GstCaps *caps;
|
||
|
gst_query_parse_allocation (decide_query, &caps, NULL);
|
||
|
|
||
|
if (caps) {
|
||
|
GstVideoInfo vinfo;
|
||
|
|
||
|
if (gst_video_info_from_caps (&vinfo, caps)) {
|
||
|
width = GST_VIDEO_INFO_WIDTH (&vinfo);
|
||
|
height = GST_VIDEO_INFO_HEIGHT (&vinfo);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (width != 0 && height != 0) {
|
||
|
allocation_meta =
|
||
|
gst_structure_new ("GstVideoOverlayCompositionMeta",
|
||
|
"width", G_TYPE_UINT, width, "height", G_TYPE_UINT, height, NULL);
|
||
|
}
|
||
|
|
||
|
GST_DEBUG_OBJECT (trans, "Adding overlay composition meta with size %ux%u",
|
||
|
width, height);
|
||
|
gst_query_add_allocation_meta (query,
|
||
|
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, allocation_meta);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_gl_overlay_compositor_element_gl_stop (GstGLBaseFilter * base)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self =
|
||
|
GST_GL_OVERLAY_COMPOSITOR_ELEMENT (base);
|
||
|
|
||
|
if (self->shader)
|
||
|
gst_object_unref (self->shader);
|
||
|
self->shader = NULL;
|
||
|
|
||
|
if (self->overlay_compositor) {
|
||
|
gst_gl_overlay_compositor_free_overlays (self->overlay_compositor);
|
||
|
gst_object_unref (self->overlay_compositor);
|
||
|
}
|
||
|
self->overlay_compositor = NULL;
|
||
|
|
||
|
GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base);
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_gl_start (GstGLBaseFilter * base)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self =
|
||
|
GST_GL_OVERLAY_COMPOSITOR_ELEMENT (base);
|
||
|
GError *error = NULL;
|
||
|
|
||
|
self->overlay_compositor = gst_gl_overlay_compositor_new (base->context);
|
||
|
g_object_set (self->overlay_compositor, "yinvert", TRUE, NULL);
|
||
|
|
||
|
if (!(self->shader = gst_gl_shader_new_default (base->context, &error))) {
|
||
|
GST_ELEMENT_ERROR (base, RESOURCE, NOT_FOUND, ("%s",
|
||
|
"Failed to compile identity shader"), ("%s", error->message));
|
||
|
return FALSE;
|
||
|
}
|
||
|
|
||
|
return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base);
|
||
|
}
|
||
|
|
||
|
static GstFlowReturn
|
||
|
_oce_prepare_output_buffer (GstBaseTransform * bt,
|
||
|
GstBuffer * buffer, GstBuffer ** outbuf)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self = GST_GL_OVERLAY_COMPOSITOR_ELEMENT (bt);
|
||
|
GstVideoOverlayCompositionMeta *comp_meta;
|
||
|
|
||
|
if (gst_base_transform_is_passthrough (bt))
|
||
|
goto passthrough;
|
||
|
|
||
|
if (!self->overlay_compositor)
|
||
|
return GST_FLOW_NOT_NEGOTIATED;
|
||
|
|
||
|
comp_meta = gst_buffer_get_video_overlay_composition_meta (buffer);
|
||
|
if (!comp_meta)
|
||
|
goto passthrough;
|
||
|
|
||
|
if (gst_video_overlay_composition_n_rectangles (comp_meta->overlay) == 0)
|
||
|
goto passthrough;
|
||
|
|
||
|
return GST_BASE_TRANSFORM_CLASS (parent_class)->prepare_output_buffer (bt,
|
||
|
buffer, outbuf);
|
||
|
|
||
|
passthrough:
|
||
|
GST_LOG_OBJECT (bt, "passthrough detected, forwarding input buffer");
|
||
|
*outbuf = buffer;
|
||
|
return GST_FLOW_OK;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_filter (GstGLFilter * filter,
|
||
|
GstBuffer * inbuf, GstBuffer * outbuf)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self =
|
||
|
GST_GL_OVERLAY_COMPOSITOR_ELEMENT (filter);
|
||
|
|
||
|
if (inbuf == outbuf)
|
||
|
return TRUE;
|
||
|
|
||
|
gst_gl_overlay_compositor_upload_overlays (self->overlay_compositor, inbuf);
|
||
|
|
||
|
return gst_gl_filter_filter_texture (filter, inbuf, outbuf);
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_filter_texture (GstGLFilter * filter,
|
||
|
GstGLMemory * in_tex, GstGLMemory * out_tex)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self =
|
||
|
GST_GL_OVERLAY_COMPOSITOR_ELEMENT (filter);
|
||
|
|
||
|
gst_gl_filter_render_to_target_with_shader (filter, in_tex, out_tex,
|
||
|
self->shader);
|
||
|
|
||
|
gst_gl_filter_render_to_target (filter, NULL, out_tex,
|
||
|
gst_gl_overlay_compositor_element_callback, NULL);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_gl_overlay_compositor_element_callback (GstGLFilter * filter,
|
||
|
GstGLMemory * in_tex, gpointer stuff)
|
||
|
{
|
||
|
GstGLOverlayCompositorElement *self =
|
||
|
GST_GL_OVERLAY_COMPOSITOR_ELEMENT (filter);
|
||
|
|
||
|
GST_LOG_OBJECT (self, "drawing overlays");
|
||
|
|
||
|
gst_gl_overlay_compositor_draw_overlays (self->overlay_compositor);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|