mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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849 lines
26 KiB
C
849 lines
26 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-gloverlay
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* @title: gloverlay
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*
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* Overlay GL video texture with a PNG image
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*
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* ## Examples
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* |[
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* gst-launch-1.0 videotestsrc ! gloverlay location=image.jpg ! glimagesink
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* ]|
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* FBO (Frame Buffer Object) is required.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/base/gsttypefindhelper.h>
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#include <gst/gl/gstglconfig.h>
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#include "gstglelements.h"
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#include "gstgloverlay.h"
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#include "effects/gstgleffectssources.h"
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#include "gstglutils.h"
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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_MSC_VER) || (defined (__MINGW64_VERSION_MAJOR) && __MINGW64_VERSION_MAJOR >= 6)
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#define HAVE_BOOLEAN
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#endif
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#include <jpeglib.h>
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#include <png.h>
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#if PNG_LIBPNG_VER >= 10400
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#define int_p_NULL NULL
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#define png_infopp_NULL NULL
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#endif
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#define GST_CAT_DEFAULT gst_gl_overlay_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_overlay_debug, "gloverlay", 0, "gloverlay element");
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#define gst_gl_overlay_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLOverlay, gst_gl_overlay, GST_TYPE_GL_FILTER,
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DEBUG_INIT);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (gloverlay, "gloverlay",
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GST_RANK_NONE, GST_TYPE_GL_OVERLAY, gl_element_init (plugin));
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static gboolean gst_gl_overlay_set_caps (GstGLFilter * filter,
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GstCaps * incaps, GstCaps * outcaps);
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static void gst_gl_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_gl_overlay_before_transform (GstBaseTransform * trans,
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GstBuffer * outbuf);
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static gboolean gst_gl_overlay_filter_texture (GstGLFilter * filter,
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GstGLMemory * in_tex, GstGLMemory * out_tex);
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static gboolean gst_gl_overlay_load_png (GstGLOverlay * overlay, FILE * fp);
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static gboolean gst_gl_overlay_load_jpeg (GstGLOverlay * overlay, FILE * fp);
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enum
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{
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PROP_0,
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PROP_LOCATION,
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PROP_OFFSET_X,
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PROP_OFFSET_Y,
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PROP_RELATIVE_X,
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PROP_RELATIVE_Y,
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PROP_OVERLAY_WIDTH,
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PROP_OVERLAY_HEIGHT,
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PROP_ALPHA
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};
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/* *INDENT-OFF* */
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/* vertex source */
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static const gchar *overlay_v_src =
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"attribute vec4 a_position;\n"
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"attribute vec2 a_texcoord;\n"
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"varying vec2 v_texcoord;\n"
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"void main()\n"
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"{\n"
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" gl_Position = a_position;\n"
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" v_texcoord = a_texcoord;\n"
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"}";
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/* fragment source */
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static const gchar *overlay_f_src =
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"uniform sampler2D texture;\n"
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"uniform float alpha;\n"
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"varying vec2 v_texcoord;\n"
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"void main()\n"
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"{\n"
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" vec4 rgba = texture2D( texture, v_texcoord );\n"
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" gl_FragColor = vec4(rgba.rgb, rgba.a * alpha);\n"
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"}\n";
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/* *INDENT-ON* */
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/* init resources that need a gl context */
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static gboolean
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gst_gl_overlay_gl_start (GstGLBaseFilter * base_filter)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (base_filter);
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gchar *frag_str;
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gboolean ret;
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if (!GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter))
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return FALSE;
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frag_str =
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g_strdup_printf ("%s%s",
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gst_gl_shader_string_get_highest_precision (base_filter->context,
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GST_GLSL_VERSION_NONE,
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GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY), overlay_f_src);
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/* blocking call, wait the opengl thread has compiled the shader */
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ret = gst_gl_context_gen_shader (base_filter->context, overlay_v_src,
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frag_str, &overlay->shader);
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g_free (frag_str);
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return ret;
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}
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/* free resources that need a gl context */
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static void
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gst_gl_overlay_gl_stop (GstGLBaseFilter * base_filter)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (base_filter);
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const GstGLFuncs *gl = base_filter->context->gl_vtable;
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if (overlay->shader) {
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gst_object_unref (overlay->shader);
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overlay->shader = NULL;
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}
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if (overlay->image_memory) {
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gst_memory_unref ((GstMemory *) overlay->image_memory);
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overlay->image_memory = NULL;
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}
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if (overlay->vao) {
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gl->DeleteVertexArrays (1, &overlay->vao);
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overlay->vao = 0;
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}
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if (overlay->vbo) {
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gl->DeleteBuffers (1, &overlay->vbo);
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overlay->vbo = 0;
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}
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if (overlay->vbo_indices) {
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gl->DeleteBuffers (1, &overlay->vbo_indices);
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overlay->vbo_indices = 0;
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}
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if (overlay->overlay_vao) {
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gl->DeleteVertexArrays (1, &overlay->overlay_vao);
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overlay->overlay_vao = 0;
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}
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if (overlay->overlay_vbo) {
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gl->DeleteBuffers (1, &overlay->overlay_vbo);
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overlay->overlay_vbo = 0;
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}
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GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter);
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}
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static void
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gst_gl_overlay_class_init (GstGLOverlayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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gst_gl_filter_add_rgba_pad_templates (GST_GL_FILTER_CLASS (klass));
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gobject_class->set_property = gst_gl_overlay_set_property;
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gobject_class->get_property = gst_gl_overlay_get_property;
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GST_GL_BASE_FILTER_CLASS (klass)->gl_start = gst_gl_overlay_gl_start;
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GST_GL_BASE_FILTER_CLASS (klass)->gl_stop = gst_gl_overlay_gl_stop;
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GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_overlay_set_caps;
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GST_GL_FILTER_CLASS (klass)->filter_texture = gst_gl_overlay_filter_texture;
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GST_BASE_TRANSFORM_CLASS (klass)->before_transform =
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GST_DEBUG_FUNCPTR (gst_gl_overlay_before_transform);
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g_object_class_install_property (gobject_class, PROP_LOCATION,
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g_param_spec_string ("location", "location",
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"Location of image file to overlay", NULL, GST_PARAM_CONTROLLABLE
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| GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_OFFSET_X,
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g_param_spec_int ("offset-x", "X Offset",
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"For positive value, horizontal offset of overlay image in pixels from"
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" left of video image. For negative value, horizontal offset of overlay"
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" image in pixels from right of video image", G_MININT, G_MAXINT, 0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_OFFSET_Y,
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g_param_spec_int ("offset-y", "Y Offset",
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"For positive value, vertical offset of overlay image in pixels from"
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" top of video image. For negative value, vertical offset of overlay"
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" image in pixels from bottom of video image", G_MININT, G_MAXINT, 0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_RELATIVE_X,
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g_param_spec_double ("relative-x", "Relative X Offset",
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"Horizontal offset of overlay image in fractions of video image "
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"width, from top-left corner of video image", 0.0, 1.0, 0.0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_RELATIVE_Y,
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g_param_spec_double ("relative-y", "Relative Y Offset",
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"Vertical offset of overlay image in fractions of video image "
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"height, from top-left corner of video image", 0.0, 1.0, 0.0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_OVERLAY_WIDTH,
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g_param_spec_int ("overlay-width", "Overlay Width",
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"Width of overlay image in pixels (0 = same as overlay image)", 0,
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G_MAXINT, 0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_OVERLAY_HEIGHT,
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g_param_spec_int ("overlay-height", "Overlay Height",
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"Height of overlay image in pixels (0 = same as overlay image)", 0,
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G_MAXINT, 0,
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GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE
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| G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_ALPHA,
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g_param_spec_double ("alpha", "Alpha", "Global alpha of overlay image",
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0.0, 1.0, 1.0, GST_PARAM_CONTROLLABLE | GST_PARAM_MUTABLE_PLAYING
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| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_set_metadata (element_class,
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"Gstreamer OpenGL Overlay", "Filter/Effect/Video",
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"Overlay GL video texture with a JPEG/PNG image",
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"Filippo Argiolas <filippo.argiolas@gmail.com>, "
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"Matthew Waters <matthew@centricular.com>");
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GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api =
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GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3;
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}
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static void
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gst_gl_overlay_init (GstGLOverlay * overlay)
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{
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overlay->offset_x = 0;
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overlay->offset_y = 0;
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overlay->relative_x = 0.0;
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overlay->relative_y = 0.0;
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overlay->overlay_width = 0;
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overlay->overlay_height = 0;
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overlay->alpha = 1.0;
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}
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static void
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gst_gl_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (object);
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switch (prop_id) {
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case PROP_LOCATION:
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g_free (overlay->location);
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overlay->location_has_changed = TRUE;
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overlay->location = g_value_dup_string (value);
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break;
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case PROP_OFFSET_X:
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overlay->offset_x = g_value_get_int (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_OFFSET_Y:
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overlay->offset_y = g_value_get_int (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_RELATIVE_X:
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overlay->relative_x = g_value_get_double (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_RELATIVE_Y:
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overlay->relative_y = g_value_get_double (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_OVERLAY_WIDTH:
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overlay->overlay_width = g_value_get_int (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_OVERLAY_HEIGHT:
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overlay->overlay_height = g_value_get_int (value);
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overlay->geometry_change = TRUE;
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break;
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case PROP_ALPHA:
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overlay->alpha = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gl_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (object);
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switch (prop_id) {
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case PROP_LOCATION:
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g_value_set_string (value, overlay->location);
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break;
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case PROP_OFFSET_X:
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g_value_set_int (value, overlay->offset_x);
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break;
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case PROP_OFFSET_Y:
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g_value_set_int (value, overlay->offset_y);
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break;
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case PROP_RELATIVE_X:
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g_value_set_double (value, overlay->relative_x);
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break;
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case PROP_RELATIVE_Y:
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g_value_set_double (value, overlay->relative_y);
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break;
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case PROP_OVERLAY_WIDTH:
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g_value_set_int (value, overlay->overlay_width);
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break;
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case PROP_OVERLAY_HEIGHT:
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g_value_set_int (value, overlay->overlay_height);
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break;
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case PROP_ALPHA:
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g_value_set_double (value, overlay->alpha);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_gl_overlay_set_caps (GstGLFilter * filter, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (filter);
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GstStructure *s = gst_caps_get_structure (incaps, 0);
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gint width = 0;
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gint height = 0;
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gst_structure_get_int (s, "width", &width);
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gst_structure_get_int (s, "height", &height);
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overlay->window_width = width;
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overlay->window_height = height;
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return TRUE;
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}
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static void
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_unbind_buffer (GstGLOverlay * overlay)
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{
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GstGLFilter *filter = GST_GL_FILTER (overlay);
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const GstGLFuncs *gl = GST_GL_BASE_FILTER (overlay)->context->gl_vtable;
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gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
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gl->BindBuffer (GL_ARRAY_BUFFER, 0);
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gl->DisableVertexAttribArray (filter->draw_attr_position_loc);
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gl->DisableVertexAttribArray (filter->draw_attr_texture_loc);
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}
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static void
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_bind_buffer (GstGLOverlay * overlay, GLuint vbo)
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{
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GstGLFilter *filter = GST_GL_FILTER (overlay);
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const GstGLFuncs *gl = GST_GL_BASE_FILTER (overlay)->context->gl_vtable;
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gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, overlay->vbo_indices);
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gl->BindBuffer (GL_ARRAY_BUFFER, vbo);
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gl->EnableVertexAttribArray (filter->draw_attr_position_loc);
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gl->EnableVertexAttribArray (filter->draw_attr_texture_loc);
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gl->VertexAttribPointer (filter->draw_attr_position_loc, 3, GL_FLOAT,
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GL_FALSE, 5 * sizeof (GLfloat), (void *) 0);
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gl->VertexAttribPointer (filter->draw_attr_texture_loc, 2, GL_FLOAT,
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GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
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}
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/* *INDENT-OFF* */
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float v_vertices[] = {
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/*| Vertex | TexCoord |*/
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-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
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1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
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1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
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-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
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};
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static const GLushort indices[] = { 0, 1, 2, 0, 2, 3, };
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/* *INDENT-ON* */
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static gboolean
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gst_gl_overlay_callback (GstGLFilter * filter, GstGLMemory * in_tex,
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gpointer stuff)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (filter);
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GstMapInfo map_info;
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guint image_tex;
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gboolean memory_mapped = FALSE;
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const GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
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gboolean ret = FALSE;
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#if GST_GL_HAVE_OPENGL
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if (gst_gl_context_get_gl_api (GST_GL_BASE_FILTER (filter)->context) &
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GST_GL_API_OPENGL) {
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gl->MatrixMode (GL_PROJECTION);
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gl->LoadIdentity ();
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}
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#endif
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gl->ActiveTexture (GL_TEXTURE0);
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gl->BindTexture (GL_TEXTURE_2D, gst_gl_memory_get_texture_id (in_tex));
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gst_gl_shader_use (overlay->shader);
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gst_gl_shader_set_uniform_1f (overlay->shader, "alpha", 1.0f);
|
|
gst_gl_shader_set_uniform_1i (overlay->shader, "texture", 0);
|
|
|
|
filter->draw_attr_position_loc =
|
|
gst_gl_shader_get_attribute_location (overlay->shader, "a_position");
|
|
filter->draw_attr_texture_loc =
|
|
gst_gl_shader_get_attribute_location (overlay->shader, "a_texcoord");
|
|
|
|
gst_gl_filter_draw_fullscreen_quad (filter);
|
|
|
|
if (!overlay->image_memory)
|
|
goto out;
|
|
|
|
if (!gst_memory_map ((GstMemory *) overlay->image_memory, &map_info,
|
|
GST_MAP_READ | GST_MAP_GL) || map_info.data == NULL)
|
|
goto out;
|
|
|
|
memory_mapped = TRUE;
|
|
image_tex = *(guint *) map_info.data;
|
|
|
|
if (!overlay->overlay_vbo) {
|
|
if (gl->GenVertexArrays) {
|
|
gl->GenVertexArrays (1, &overlay->overlay_vao);
|
|
gl->BindVertexArray (overlay->overlay_vao);
|
|
}
|
|
|
|
gl->GenBuffers (1, &overlay->vbo_indices);
|
|
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, overlay->vbo_indices);
|
|
gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indices), indices,
|
|
GL_STATIC_DRAW);
|
|
|
|
gl->GenBuffers (1, &overlay->overlay_vbo);
|
|
gl->BindBuffer (GL_ARRAY_BUFFER, overlay->overlay_vbo);
|
|
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, overlay->vbo_indices);
|
|
overlay->geometry_change = TRUE;
|
|
}
|
|
|
|
if (gl->GenVertexArrays) {
|
|
gl->BindVertexArray (overlay->overlay_vao);
|
|
}
|
|
|
|
if (overlay->geometry_change) {
|
|
gint render_width, render_height;
|
|
gfloat x, y, image_width, image_height;
|
|
|
|
/* *INDENT-OFF* */
|
|
float vertices[] = {
|
|
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
|
|
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
|
|
1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
|
|
-1.0f, 1.0f, 0.0f, 0.0, 1.0f,
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
/* scale from [0, 1] -> [-1, 1] */
|
|
x = ((gfloat) overlay->offset_x / (gfloat) overlay->window_width +
|
|
overlay->relative_x) * 2.0f - 1.0;
|
|
y = ((gfloat) overlay->offset_y / (gfloat) overlay->window_height +
|
|
overlay->relative_y) * 2.0f - 1.0;
|
|
/* scale from [0, 1] -> [0, 2] */
|
|
render_width =
|
|
overlay->overlay_width >
|
|
0 ? overlay->overlay_width : overlay->image_width;
|
|
render_height =
|
|
overlay->overlay_height >
|
|
0 ? overlay->overlay_height : overlay->image_height;
|
|
image_width =
|
|
((gfloat) render_width / (gfloat) overlay->window_width) * 2.0f;
|
|
image_height =
|
|
((gfloat) render_height / (gfloat) overlay->window_height) * 2.0f;
|
|
|
|
vertices[0] = vertices[15] = x;
|
|
vertices[5] = vertices[10] = x + image_width;
|
|
vertices[1] = vertices[6] = y;
|
|
vertices[11] = vertices[16] = y + image_height;
|
|
|
|
gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
|
|
GL_STATIC_DRAW);
|
|
}
|
|
|
|
_bind_buffer (overlay, overlay->overlay_vbo);
|
|
|
|
gl->BindTexture (GL_TEXTURE_2D, image_tex);
|
|
gst_gl_shader_set_uniform_1f (overlay->shader, "alpha", overlay->alpha);
|
|
|
|
gl->Enable (GL_BLEND);
|
|
if (gl->BlendFuncSeparate)
|
|
gl->BlendFuncSeparate (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE,
|
|
GL_ONE_MINUS_SRC_ALPHA);
|
|
else
|
|
gl->BlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
gl->BlendEquation (GL_FUNC_ADD);
|
|
|
|
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
|
|
|
|
gl->Disable (GL_BLEND);
|
|
ret = TRUE;
|
|
|
|
out:
|
|
if (gl->GenVertexArrays)
|
|
gl->BindVertexArray (0);
|
|
else
|
|
_unbind_buffer (overlay);
|
|
|
|
gst_gl_context_clear_shader (GST_GL_BASE_FILTER (filter)->context);
|
|
|
|
if (memory_mapped)
|
|
gst_memory_unmap ((GstMemory *) overlay->image_memory, &map_info);
|
|
|
|
overlay->geometry_change = FALSE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
load_file (GstGLOverlay * overlay)
|
|
{
|
|
FILE *fp;
|
|
guint8 buff[16];
|
|
gsize n_read;
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
gboolean success = FALSE;
|
|
|
|
if (overlay->location == NULL)
|
|
return TRUE;
|
|
|
|
if ((fp = fopen (overlay->location, "rb")) == NULL) {
|
|
GST_ELEMENT_ERROR (overlay, RESOURCE, NOT_FOUND, ("Can't open file"),
|
|
("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
n_read = fread (buff, 1, sizeof (buff), fp);
|
|
if (n_read != sizeof (buff)) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Can't read file header"),
|
|
("File: %s", overlay->location));
|
|
goto out;
|
|
}
|
|
|
|
caps = gst_type_find_helper_for_data (GST_OBJECT (overlay), buff,
|
|
sizeof (buff), NULL);
|
|
|
|
if (caps == NULL) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Can't find file type"),
|
|
("File: %s", overlay->location));
|
|
goto out;
|
|
}
|
|
|
|
fseek (fp, 0, SEEK_SET);
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
if (gst_structure_has_name (structure, "image/jpeg")) {
|
|
success = gst_gl_overlay_load_jpeg (overlay, fp);
|
|
} else if (gst_structure_has_name (structure, "image/png")) {
|
|
success = gst_gl_overlay_load_png (overlay, fp);
|
|
} else {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Image type not supported"),
|
|
("File: %s", overlay->location));
|
|
}
|
|
|
|
out:
|
|
fclose (fp);
|
|
gst_caps_replace (&caps, NULL);
|
|
|
|
return success;
|
|
}
|
|
|
|
static gboolean
|
|
gst_gl_overlay_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex,
|
|
GstGLMemory * out_tex)
|
|
{
|
|
GstGLOverlay *overlay = GST_GL_OVERLAY (filter);
|
|
|
|
if (overlay->location_has_changed) {
|
|
if (overlay->image_memory) {
|
|
gst_memory_unref ((GstMemory *) overlay->image_memory);
|
|
overlay->image_memory = NULL;
|
|
}
|
|
|
|
if (!load_file (overlay))
|
|
return FALSE;
|
|
|
|
overlay->location_has_changed = FALSE;
|
|
}
|
|
|
|
gst_gl_filter_render_to_target (filter, in_tex, out_tex,
|
|
gst_gl_overlay_callback, overlay);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_gl_overlay_before_transform (GstBaseTransform * trans, GstBuffer * outbuf)
|
|
{
|
|
GstClockTime stream_time;
|
|
|
|
stream_time = gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME,
|
|
GST_BUFFER_TIMESTAMP (outbuf));
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (stream_time))
|
|
gst_object_sync_values (GST_OBJECT (trans), stream_time);
|
|
}
|
|
|
|
static void
|
|
user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
|
|
{
|
|
g_warning ("%s\n", warning_msg);
|
|
}
|
|
|
|
static gboolean
|
|
gst_gl_overlay_load_jpeg (GstGLOverlay * overlay, FILE * fp)
|
|
{
|
|
GstGLBaseMemoryAllocator *mem_allocator;
|
|
GstGLVideoAllocationParams *params;
|
|
GstVideoInfo v_info;
|
|
GstVideoAlignment v_align;
|
|
GstMapInfo map_info;
|
|
struct jpeg_decompress_struct cinfo;
|
|
struct jpeg_error_mgr jerr;
|
|
JSAMPROW j;
|
|
int i;
|
|
|
|
jpeg_create_decompress (&cinfo);
|
|
cinfo.err = jpeg_std_error (&jerr);
|
|
jpeg_stdio_src (&cinfo, fp);
|
|
jpeg_read_header (&cinfo, TRUE);
|
|
jpeg_start_decompress (&cinfo);
|
|
overlay->image_width = cinfo.image_width;
|
|
overlay->image_height = cinfo.image_height;
|
|
|
|
if (cinfo.num_components == 1)
|
|
gst_video_info_set_format (&v_info, GST_VIDEO_FORMAT_Y444,
|
|
overlay->image_width, overlay->image_height);
|
|
else
|
|
gst_video_info_set_format (&v_info, GST_VIDEO_FORMAT_RGB,
|
|
overlay->image_width, overlay->image_height);
|
|
|
|
gst_video_alignment_reset (&v_align);
|
|
v_align.stride_align[0] = 32 - 1;
|
|
gst_video_info_align (&v_info, &v_align);
|
|
|
|
mem_allocator =
|
|
GST_GL_BASE_MEMORY_ALLOCATOR (gst_gl_memory_allocator_get_default
|
|
(GST_GL_BASE_FILTER (overlay)->context));
|
|
params =
|
|
gst_gl_video_allocation_params_new (GST_GL_BASE_FILTER (overlay)->context,
|
|
NULL, &v_info, 0, &v_align, GST_GL_TEXTURE_TARGET_2D, GST_GL_RGBA);
|
|
overlay->image_memory = (GstGLMemory *)
|
|
gst_gl_base_memory_alloc (mem_allocator,
|
|
(GstGLAllocationParams *) params);
|
|
gst_gl_allocation_params_free ((GstGLAllocationParams *) params);
|
|
gst_object_unref (mem_allocator);
|
|
|
|
if (!gst_memory_map ((GstMemory *) overlay->image_memory, &map_info,
|
|
GST_MAP_WRITE)) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("failed to map memory"),
|
|
("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
for (i = 0; i < overlay->image_height; ++i) {
|
|
j = map_info.data + v_info.stride[0] * i;
|
|
jpeg_read_scanlines (&cinfo, &j, 1);
|
|
}
|
|
jpeg_finish_decompress (&cinfo);
|
|
jpeg_destroy_decompress (&cinfo);
|
|
gst_memory_unmap ((GstMemory *) overlay->image_memory, &map_info);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_gl_overlay_load_png (GstGLOverlay * overlay, FILE * fp)
|
|
{
|
|
GstGLBaseMemoryAllocator *mem_allocator;
|
|
GstGLVideoAllocationParams *params;
|
|
GstVideoInfo v_info;
|
|
GstMapInfo map_info;
|
|
|
|
png_structp png_ptr;
|
|
png_infop info_ptr;
|
|
png_uint_32 width = 0;
|
|
png_uint_32 height = 0;
|
|
gint bit_depth = 0;
|
|
gint color_type = 0;
|
|
gint interlace_type = 0;
|
|
guint y = 0;
|
|
guchar **rows = NULL;
|
|
gint filler;
|
|
png_byte magic[8];
|
|
gint n_read;
|
|
|
|
if (!GST_GL_BASE_FILTER (overlay)->context)
|
|
return FALSE;
|
|
|
|
/* Read magic number */
|
|
n_read = fread (magic, 1, sizeof (magic), fp);
|
|
if (n_read != sizeof (magic)) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("can't read PNG magic number"), ("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check for valid magic number */
|
|
if (png_sig_cmp (magic, 0, sizeof (magic))) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("not a valid PNG image"), ("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
|
|
if (png_ptr == NULL) {
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("failed to initialize the png_struct"), ("File: %s",
|
|
overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
png_set_error_fn (png_ptr, NULL, NULL, user_warning_fn);
|
|
|
|
info_ptr = png_create_info_struct (png_ptr);
|
|
if (info_ptr == NULL) {
|
|
png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL);
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("failed to initialize the memory for image information"),
|
|
("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
png_init_io (png_ptr, fp);
|
|
|
|
png_set_sig_bytes (png_ptr, sizeof (magic));
|
|
|
|
png_read_info (png_ptr, info_ptr);
|
|
|
|
png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
|
|
&interlace_type, int_p_NULL, int_p_NULL);
|
|
|
|
if (color_type == PNG_COLOR_TYPE_RGB) {
|
|
filler = 0xff;
|
|
png_set_filler (png_ptr, filler, PNG_FILLER_AFTER);
|
|
color_type = PNG_COLOR_TYPE_RGB_ALPHA;
|
|
}
|
|
|
|
if (color_type != PNG_COLOR_TYPE_RGB_ALPHA) {
|
|
png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL);
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("color type is not rgb"), ("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
|
|
overlay->image_width = width;
|
|
overlay->image_height = height;
|
|
|
|
gst_video_info_set_format (&v_info, GST_VIDEO_FORMAT_RGBA, width, height);
|
|
mem_allocator =
|
|
GST_GL_BASE_MEMORY_ALLOCATOR (gst_gl_memory_allocator_get_default
|
|
(GST_GL_BASE_FILTER (overlay)->context));
|
|
params =
|
|
gst_gl_video_allocation_params_new (GST_GL_BASE_FILTER (overlay)->context,
|
|
NULL, &v_info, 0, NULL, GST_GL_TEXTURE_TARGET_2D, GST_GL_RGBA);
|
|
overlay->image_memory = (GstGLMemory *)
|
|
gst_gl_base_memory_alloc (mem_allocator,
|
|
(GstGLAllocationParams *) params);
|
|
gst_gl_allocation_params_free ((GstGLAllocationParams *) params);
|
|
gst_object_unref (mem_allocator);
|
|
|
|
if (!gst_memory_map ((GstMemory *) overlay->image_memory, &map_info,
|
|
GST_MAP_WRITE)) {
|
|
png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL);
|
|
GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
|
|
("failed to map memory"), ("File: %s", overlay->location));
|
|
return FALSE;
|
|
}
|
|
rows = (guchar **) malloc (sizeof (guchar *) * height);
|
|
|
|
for (y = 0; y < height; ++y)
|
|
rows[y] = (guchar *) (map_info.data + y * width * 4);
|
|
|
|
png_read_image (png_ptr, rows);
|
|
|
|
free (rows);
|
|
gst_memory_unmap ((GstMemory *) overlay->image_memory, &map_info);
|
|
|
|
png_read_end (png_ptr, info_ptr);
|
|
png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL);
|
|
|
|
return TRUE;
|
|
}
|