/* * GStreamer * Copyright (C) 2008 Filippo Argiolas * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-gloverlay * * Overlay GL video texture with a PNG image * * * Examples * |[ * gst-launch videotestsrc ! "video/x-raw-rgb" ! glupload ! gloverlay location=imagefile ! glimagesink * ]| * FBO (Frame Buffer Object) is required. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstgloverlay.h" #include #define GST_CAT_DEFAULT gst_gl_overlay_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); #define DEBUG_INIT(bla) \ GST_DEBUG_CATEGORY_INIT (gst_gl_overlay_debug, "gloverlay", 0, "gloverlay element"); GST_BOILERPLATE_FULL (GstGLOverlay, gst_gl_overlay, GstGLFilter, GST_TYPE_GL_FILTER, DEBUG_INIT); static void gst_gl_overlay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_gl_overlay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_gl_overlay_init_resources (GstGLFilter * filter); static void gst_gl_overlay_reset_resources (GstGLFilter * filter); static gboolean gst_gl_overlay_filter (GstGLFilter * filter, GstGLBuffer * inbuf, GstGLBuffer * outbuf); static gboolean gst_gl_overlay_loader (GstGLFilter * filter); static const GstElementDetails element_details = GST_ELEMENT_DETAILS ("Gstreamer OpenGL Overlay", "Filter/Effect", "Overlay GL video texture with a PNG image", "Filippo Argiolas "); enum { PROP_0, PROP_LOCATION, PROP_XPOS_PNG, PROP_YPOS_PNG, PROP_SIZE_PNG, PROP_XPOS_VIDEO, PROP_YPOS_VIDEO, PROP_SIZE_VIDEO, PROP_VIDEOTOP }; /* init resources that need a gl context */ static void gst_gl_overlay_init_gl_resources (GstGLFilter * filter) { // GstGLOverlay *overlay = GST_GL_OVERLAY (filter); } /* free resources that need a gl context */ static void gst_gl_overlay_reset_gl_resources (GstGLFilter * filter) { GstGLOverlay *overlay = GST_GL_OVERLAY (filter); glDeleteTextures (1, &overlay->pbuftexture); } static void gst_gl_overlay_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_set_details (element_class, &element_details); } static void gst_gl_overlay_class_init (GstGLOverlayClass * klass) { GObjectClass *gobject_class; gobject_class = (GObjectClass *) klass; gobject_class->set_property = gst_gl_overlay_set_property; gobject_class->get_property = gst_gl_overlay_get_property; GST_GL_FILTER_CLASS (klass)->filter = gst_gl_overlay_filter; GST_GL_FILTER_CLASS (klass)->display_init_cb = gst_gl_overlay_init_gl_resources; GST_GL_FILTER_CLASS (klass)->display_reset_cb = gst_gl_overlay_reset_gl_resources; GST_GL_FILTER_CLASS (klass)->onStart = gst_gl_overlay_init_resources; GST_GL_FILTER_CLASS (klass)->onStop = gst_gl_overlay_reset_resources; g_object_class_install_property (gobject_class, PROP_LOCATION, g_param_spec_string ("location", "Location of the image", "Location of the image", NULL, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_XPOS_PNG, g_param_spec_int ("xpos-png", "X position of overlay image in percents", "X position of overlay image in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_YPOS_PNG, g_param_spec_int ("ypos-png", "Y position of overlay image in percents", "Y position of overlay image in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SIZE_PNG, g_param_spec_int ("proportion-png", "Relative size of overlay image, in percents", "Relative size of iverlay image, in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_XPOS_VIDEO, g_param_spec_int ("xpos-video", "X position of overlay video in percents", "X position of overlay video in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_YPOS_VIDEO, g_param_spec_int ("ypos-video", "Y position of overlay video in percents", "Y position of overlay video in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SIZE_VIDEO, g_param_spec_int ("proportion-video", "Relative size of overlay video, in percents", "Relative size of iverlay video, in percents", 0, 100, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_VIDEOTOP, g_param_spec_boolean ("video-top", "Video-top", "Video is over png image", FALSE, G_PARAM_READWRITE)); /* g_object_class_install_property (gobject_class, PROP_STRETCH, g_param_spec_boolean ("stretch", "Stretch the image to texture size", "Stretch the image to fit video texture size", TRUE, G_PARAM_READWRITE)); */ } static void gst_gl_overlay_draw_texture_video_on_png (GstGLOverlay * overlay, GLuint tex) { GstGLFilter *filter = GST_GL_FILTER (overlay); gfloat posx = 0.0; gfloat posy = 0.0; gfloat size = 0.0; gfloat width = (gfloat) overlay->width; gfloat height = (gfloat) overlay->height; if (overlay->pbuftexture == 0) return; // if (overlay->stretch) { // width = (gfloat) overlay->width; // height = (gfloat) overlay->height; // } glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable (GL_BLEND); glEnable (GL_TEXTURE_RECTANGLE_ARB); glBindTexture (GL_TEXTURE_RECTANGLE_ARB, overlay->pbuftexture); glBegin (GL_QUADS); size = (overlay->size_png) / 50.0; posx = (overlay->pos_x_png - 50.0) / 50.0; posx = (posx - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posx + (size / 2) > 1.00) ? (1.0 - size / 2) : posx; posy = (overlay->pos_y_png - 50.0) / 50.0; posy = (posy - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posy + (size / 2) > 1.00) ? (1.0 - size / 2) : posy; glTexCoord2f (0.0, 0.0); glVertex2f (posx - (size / 2), posy - (size / 2)); glTexCoord2f (width, 0.0); glVertex2f (posx + (size / 2), posy - (size / 2)); glTexCoord2f (width, height); glVertex2f (posx + (size / 2), posy + (size / 2)); glTexCoord2f (0.0, height); glVertex2f (posx - (size / 2), posy + (size / 2)); glEnd (); width = (gfloat) filter->width; height = (gfloat) filter->height; glActiveTexture (GL_TEXTURE0); glEnable (GL_TEXTURE_RECTANGLE_ARB); glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex); glBegin (GL_QUADS); size = (overlay->size_video) / 50.0; posx = (overlay->pos_x_video - 50.0) / 50.0; posx = (posx - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posx + (size / 2) > 1.00) ? (1.0 - size / 2) : posx; posy = (overlay->pos_y_video - 50.0) / 50.0; posy = (posy - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posy + (size / 2) > 1.00) ? (1.0 - size / 2) : posy; glTexCoord2f (0.0, 0.0); glVertex2f (posx - (size / 2), posy - (size / 2)); glTexCoord2f (width, 0.0); glVertex2f (posx + (size / 2), posy - (size / 2)); glTexCoord2f (width, height); glVertex2f (posx + (size / 2), posy + (size / 2)); glTexCoord2f (0.0, height); glVertex2f (posx - (size / 2), posy + (size / 2)); glEnd (); glFlush (); } static void gst_gl_overlay_draw_texture_png_on_video (GstGLOverlay * overlay, GLuint tex) { GstGLFilter *filter = GST_GL_FILTER (overlay); gfloat posx = 0.0; gfloat posy = 0.0; gfloat size = 0.0; gfloat width = (gfloat) filter->width; gfloat height = (gfloat) filter->height; glActiveTexture (GL_TEXTURE0); glEnable (GL_TEXTURE_RECTANGLE_ARB); glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex); glBegin (GL_QUADS); size = (overlay->size_video) / 50.0; posx = (overlay->pos_x_video - 50.0) / 50.0; posx = (posx - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posx + (size / 2) > 1.00) ? (1.0 - size / 2) : posx; posy = (overlay->pos_y_video - 50.0) / 50.0; posy = (posy - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posy + (size / 2) > 1.00) ? (1.0 - size / 2) : posy; glTexCoord2f (0.0, 0.0); glVertex2f (posx - (size / 2), posy - (size / 2)); glTexCoord2f (width, 0.0); glVertex2f (posx + (size / 2), posy - (size / 2)); glTexCoord2f (width, height); glVertex2f (posx + (size / 2), posy + (size / 2)); glTexCoord2f (0.0, height); glVertex2f (posx - (size / 2), posy + (size / 2)); glEnd (); if (overlay->pbuftexture == 0) return; // if (overlay->stretch) { width = (gfloat) overlay->width; height = (gfloat) overlay->height; // } glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable (GL_BLEND); glEnable (GL_TEXTURE_RECTANGLE_ARB); glBindTexture (GL_TEXTURE_RECTANGLE_ARB, overlay->pbuftexture); glBegin (GL_QUADS); size = (overlay->size_png) / 50.0; posx = (overlay->pos_x_png - 50.0) / 50.0; posx = (posx - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posx + (size / 2) > 1.00) ? (1.0 - size / 2) : posx; posy = (overlay->pos_y_png - 50.0) / 50.0; posy = (posy - (size / 2) < -1.00) ? (-1.0 + size / 2) : (posy + (size / 2) > 1.00) ? (1.0 - size / 2) : posy; glTexCoord2f (0.0, 0.0); glVertex2f (posx - (size / 2), posy - (size / 2)); glTexCoord2f (width, 0.0); glVertex2f (posx + (size / 2), posy - (size / 2)); glTexCoord2f (width, height); glVertex2f (posx + (size / 2), posy + (size / 2)); glTexCoord2f (0.0, height); glVertex2f (posx - (size / 2), posy + (size / 2)); glEnd (); glFlush (); } static void gst_gl_overlay_init (GstGLOverlay * overlay, GstGLOverlayClass * klass) { overlay->location = NULL; overlay->pixbuf = NULL; overlay->pbuftexture = 0; overlay->pbuftexture = 0; overlay->width = 0; overlay->height = 0; overlay->pos_x_png = 0.0; overlay->pos_y_png = 0.0; overlay->size_png = 100; overlay->pos_x_video = 0.0; overlay->pos_y_video = 0.0; overlay->size_video = 100; overlay->video_top = FALSE; // overlay->stretch = TRUE; overlay->pbuf_has_changed = FALSE; } static void gst_gl_overlay_reset_resources (GstGLFilter * filter) { // GstGLOverlay* overlay = GST_GL_OVERLAY(filter); } static void gst_gl_overlay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLOverlay *overlay = GST_GL_OVERLAY (object); switch (prop_id) { case PROP_LOCATION: if (overlay->location != NULL) g_free (overlay->location); overlay->pbuf_has_changed = TRUE; overlay->location = g_value_dup_string (value); break; case PROP_XPOS_PNG: overlay->pos_x_png = g_value_get_int (value); break; case PROP_YPOS_PNG: overlay->pos_y_png = g_value_get_int (value); break; case PROP_SIZE_PNG: overlay->size_png = g_value_get_int (value); break; case PROP_XPOS_VIDEO: overlay->pos_x_video = g_value_get_int (value); break; case PROP_YPOS_VIDEO: overlay->pos_y_video = g_value_get_int (value); break; case PROP_SIZE_VIDEO: overlay->size_video = g_value_get_int (value); break; case PROP_VIDEOTOP: overlay->video_top = g_value_get_boolean (value); break; /* case PROP_STRETCH: overlay->stretch = g_value_get_boolean (value); break; */ default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_overlay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLOverlay *overlay = GST_GL_OVERLAY (object); switch (prop_id) { case PROP_LOCATION: g_value_set_string (value, overlay->location); break; case PROP_XPOS_PNG: g_value_set_int (value, overlay->pos_x_png); break; case PROP_YPOS_PNG: g_value_set_int (value, overlay->pos_y_png); break; case PROP_SIZE_PNG: g_value_set_int (value, overlay->size_png); break; case PROP_XPOS_VIDEO: g_value_set_int (value, overlay->pos_x_video); break; case PROP_YPOS_VIDEO: g_value_set_int (value, overlay->pos_y_video); break; case PROP_SIZE_VIDEO: g_value_set_int (value, overlay->size_video); break; case PROP_VIDEOTOP: g_value_set_boolean (value, overlay->video_top); break; /* case PROP_STRETCH: g_value_set_boolean (value, overlay->stretch); break; */ default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_overlay_init_resources (GstGLFilter * filter) { // GstGLOverlay *overlay = GST_GL_OVERLAY (filter); } static void gst_gl_overlay_callback (gint width, gint height, guint texture, gpointer stuff) { GstGLOverlay *overlay = GST_GL_OVERLAY (stuff); glMatrixMode (GL_PROJECTION); glLoadIdentity (); if (overlay->video_top) gst_gl_overlay_draw_texture_video_on_png (overlay, texture); else gst_gl_overlay_draw_texture_png_on_video (overlay, texture); } static void init_pixbuf_texture (GstGLDisplay * display, gpointer data) { GstGLOverlay *overlay = GST_GL_OVERLAY (data); if (overlay->pixbuf) { glDeleteTextures (1, &overlay->pbuftexture); glGenTextures (1, &overlay->pbuftexture); glBindTexture (GL_TEXTURE_RECTANGLE_ARB, overlay->pbuftexture); glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, (gint) overlay->width, (gint) overlay->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, overlay->pixbuf); } else display->isAlive = FALSE; } static gboolean gst_gl_overlay_filter (GstGLFilter * filter, GstGLBuffer * inbuf, GstGLBuffer * outbuf) { GstGLOverlay *overlay = GST_GL_OVERLAY (filter); if (overlay->pbuf_has_changed && (overlay->location != NULL)) { if (!gst_gl_overlay_loader (filter)) overlay->pixbuf = NULL; /* if loader failed then display is turned off */ gst_gl_display_thread_add (filter->display, init_pixbuf_texture, overlay); if (overlay->pixbuf) { free (overlay->pixbuf); overlay->pixbuf = NULL; } overlay->pbuf_has_changed = FALSE; } gst_gl_filter_render_to_target (filter, inbuf->texture, outbuf->texture, gst_gl_overlay_callback, overlay); return TRUE; } static void user_warning_fn (png_structp png_ptr, png_const_charp warning_msg) { g_warning ("%s\n", warning_msg); } #define LOAD_ERROR(msg) { GST_WARNING ("unable to load %s: %s", overlay->location, msg); return FALSE; } static gboolean gst_gl_overlay_loader (GstGLFilter * filter) { GstGLOverlay *overlay = GST_GL_OVERLAY (filter); png_structp png_ptr; png_infop info_ptr; guint sig_read = 0; png_uint_32 width = 0; png_uint_32 height = 0; gint bit_depth = 0; gint color_type = 0; gint interlace_type = 0; png_FILE_p fp = NULL; guint y = 0; guchar **rows = NULL; gint filler; if (!filter->display) return TRUE; if ((fp = fopen (overlay->location, "rb")) == NULL) LOAD_ERROR ("file not found"); png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); if (png_ptr == NULL) { fclose (fp); LOAD_ERROR ("failed to initialize the png_struct"); } png_set_error_fn (png_ptr, NULL, NULL, user_warning_fn); info_ptr = png_create_info_struct (png_ptr); if (info_ptr == NULL) { fclose (fp); png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL); LOAD_ERROR ("failed to initialize the memory for image information"); } png_init_io (png_ptr, fp); png_set_sig_bytes (png_ptr, sig_read); 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) { fclose (fp); png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL); LOAD_ERROR ("color type is not rgb"); } overlay->width = width; overlay->height = height; overlay->pixbuf = (guchar *) malloc (sizeof (guchar) * width * height * 4); rows = (guchar **) malloc (sizeof (guchar *) * height); for (y = 0; y < height; ++y) rows[y] = (guchar *) (overlay->pixbuf + y * width * 4); png_read_image (png_ptr, rows); free (rows); png_read_end (png_ptr, info_ptr); png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL); fclose (fp); return TRUE; }