/* GStreamer * Copyright (C) 2008 David Schleef <ds@entropywave.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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <gst/gst.h> #include <gst/base/gstbasetransform.h> #include <gst/video/video.h> #include <string.h> #include <cog/cog.h> #include <cog/cogvirtframe.h> #include <math.h> #include <png.h> #include "gstcogutils.h" #define GST_TYPE_LOGOINSERT \ (gst_logoinsert_get_type()) #define GST_LOGOINSERT(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LOGOINSERT,GstLogoinsert)) #define GST_LOGOINSERT_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_LOGOINSERT,GstLogoinsertClass)) #define GST_IS_LOGOINSERT(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LOGOINSERT)) #define GST_IS_LOGOINSERT_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_LOGOINSERT)) typedef struct _GstLogoinsert GstLogoinsert; typedef struct _GstLogoinsertClass GstLogoinsertClass; struct _GstLogoinsert { GstBaseTransform base_transform; gchar *location; GstVideoFormat format; int width; int height; gchar *data; gsize size; CogFrame *overlay_frame; CogFrame *ayuv_frame; CogFrame *alpha_frame; }; struct _GstLogoinsertClass { GstBaseTransformClass parent_class; }; /* GstLogoinsert signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_LOCATION, }; GType gst_logoinsert_get_type (void); static void gst_logoinsert_base_init (gpointer g_class); static void gst_logoinsert_class_init (gpointer g_class, gpointer class_data); static void gst_logoinsert_init (GTypeInstance * instance, gpointer g_class); static void gst_logoinsert_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_logoinsert_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_logoinsert_set_location (GstLogoinsert * li, const gchar * location); static gboolean gst_logoinsert_set_caps (GstBaseTransform * base_transform, GstCaps * incaps, GstCaps * outcaps); static GstFlowReturn gst_logoinsert_transform_ip (GstBaseTransform * base_transform, GstBuffer * buf); static CogFrame *cog_frame_new_from_png (void *data, int size); static CogFrame *cog_virt_frame_extract_alpha (CogFrame * frame); static CogFrame *cog_frame_realize (CogFrame * frame); static GstStaticPadTemplate gst_logoinsert_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")) ); static GstStaticPadTemplate gst_logoinsert_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{I420,YUY2,UYVY,AYUV}")) ); GType gst_logoinsert_get_type (void) { static GType compress_type = 0; if (!compress_type) { static const GTypeInfo compress_info = { sizeof (GstLogoinsertClass), gst_logoinsert_base_init, NULL, gst_logoinsert_class_init, NULL, NULL, sizeof (GstLogoinsert), 0, gst_logoinsert_init, }; compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM, "GstLogoinsert", &compress_info, 0); } return compress_type; } static void gst_logoinsert_base_init (gpointer g_class) { static GstElementDetails compress_details = GST_ELEMENT_DETAILS ("Video Filter Template", "Filter/Effect/Video", "Template for a video filter", "David Schleef <ds@schleef.org>"); GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_logoinsert_src_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_logoinsert_sink_template)); gst_element_class_set_details (element_class, &compress_details); } static void gst_logoinsert_class_init (gpointer g_class, gpointer class_data) { GObjectClass *gobject_class; GstBaseTransformClass *base_transform_class; GstLogoinsertClass *filter_class; gobject_class = G_OBJECT_CLASS (g_class); base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class); filter_class = GST_LOGOINSERT_CLASS (g_class); gobject_class->set_property = gst_logoinsert_set_property; gobject_class->get_property = gst_logoinsert_get_property; g_object_class_install_property (gobject_class, ARG_LOCATION, g_param_spec_string ("location", "location", "location of PNG file to overlay", "", G_PARAM_READWRITE)); base_transform_class->set_caps = gst_logoinsert_set_caps; base_transform_class->transform_ip = gst_logoinsert_transform_ip; } static void gst_logoinsert_init (GTypeInstance * instance, gpointer g_class) { GST_DEBUG ("gst_logoinsert_init"); } static void gst_logoinsert_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstLogoinsert *src; g_return_if_fail (GST_IS_LOGOINSERT (object)); src = GST_LOGOINSERT (object); GST_DEBUG ("gst_logoinsert_set_property"); switch (prop_id) { case ARG_LOCATION: gst_logoinsert_set_location (src, g_value_get_string (value)); break; default: break; } } static void gst_logoinsert_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstLogoinsert *src; g_return_if_fail (GST_IS_LOGOINSERT (object)); src = GST_LOGOINSERT (object); switch (prop_id) { case ARG_LOCATION: g_value_set_string (value, src->location); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gst_logoinsert_set_caps (GstBaseTransform * base_transform, GstCaps * incaps, GstCaps * outcaps) { GstLogoinsert *li; g_return_val_if_fail (GST_IS_LOGOINSERT (base_transform), GST_FLOW_ERROR); li = GST_LOGOINSERT (base_transform); gst_video_format_parse_caps (incaps, &li->format, &li->width, &li->height); return TRUE; } static GstFlowReturn gst_logoinsert_transform_ip (GstBaseTransform * base_transform, GstBuffer * buf) { GstLogoinsert *li; CogFrame *frame; g_return_val_if_fail (GST_IS_LOGOINSERT (base_transform), GST_FLOW_ERROR); li = GST_LOGOINSERT (base_transform); frame = gst_cog_buffer_wrap (buf, li->format, li->width, li->height); if (li->ayuv_frame == NULL) return GST_FLOW_OK; if (li->overlay_frame == NULL) { CogFrame *f; f = cog_virt_frame_extract_alpha (cog_frame_ref (li->ayuv_frame)); f = cog_virt_frame_new_subsample (f, frame->format); li->alpha_frame = cog_frame_realize (f); f = cog_virt_frame_new_unpack (cog_frame_ref (li->ayuv_frame)); f = cog_virt_frame_new_color_matrix_RGB_to_YCbCr (f, COG_COLOR_MATRIX_SDTV, 8); f = cog_virt_frame_new_subsample (f, frame->format); li->overlay_frame = cog_frame_realize (f); } if (1) { int i, j; int k; guint8 *dest; guint8 *src; guint8 *alpha; int offset_x, offset_y; for (k = 0; k < 3; k++) { offset_x = frame->components[k].width - li->alpha_frame->components[k].width; offset_y = frame->components[k].height - li->alpha_frame->components[k].height; for (j = 0; j < li->overlay_frame->components[k].height; j++) { dest = COG_FRAME_DATA_GET_LINE (frame->components + k, j + offset_y); src = COG_FRAME_DATA_GET_LINE (li->overlay_frame->components + k, j); alpha = COG_FRAME_DATA_GET_LINE (li->alpha_frame->components + k, j); #define oil_divide_255(x) ((((x)+128) + (((x)+128)>>8))>>8) for (i = 0; i < li->overlay_frame->components[k].width; i++) { dest[i + offset_x] = oil_divide_255 (src[i] * alpha[i] + dest[i + offset_x] * (255 - alpha[i])); } } } } return GST_FLOW_OK; } static void gst_logoinsert_set_location (GstLogoinsert * li, const gchar * location) { gboolean ret; GError *error = NULL; g_free (li->location); g_free (li->data); if (li->overlay_frame) { cog_frame_unref (li->overlay_frame); li->overlay_frame = NULL; } li->location = g_strdup (location); ret = g_file_get_contents (li->location, &li->data, &li->size, &error); if (!ret) { li->data = NULL; li->size = 0; return; } li->ayuv_frame = cog_frame_new_from_png (li->data, li->size); if (li->alpha_frame) { cog_frame_unref (li->alpha_frame); li->alpha_frame = NULL; } if (li->overlay_frame) { cog_frame_unref (li->overlay_frame); li->overlay_frame = NULL; } } /* load PNG into CogFrame */ struct png_data_struct { unsigned char *data; int size; int offset; }; static void read_data (png_structp png_ptr, png_bytep data, png_size_t length) { struct png_data_struct *s = png_ptr->io_ptr; memcpy (data, s->data + s->offset, length); s->offset += length; } static CogFrame * cog_frame_new_from_png (void *data, int size) { struct png_data_struct s = { 0 }; png_structp png_ptr; png_infop info_ptr; png_bytep *rows; CogFrame *frame; guchar *frame_data; int rowbytes; int j; int width, height; int color_type; png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); info_ptr = png_create_info_struct (png_ptr); s.data = data; s.size = size; png_set_read_fn (png_ptr, (void *) &s, read_data); png_read_info (png_ptr, info_ptr); width = png_get_image_width (png_ptr, info_ptr); height = png_get_image_height (png_ptr, info_ptr); color_type = png_get_color_type (png_ptr, info_ptr); GST_DEBUG ("PNG size %dx%d color_type %d", width, height, color_type); png_set_strip_16 (png_ptr); png_set_packing (png_ptr); if (color_type == PNG_COLOR_TYPE_RGB) { png_set_filler (png_ptr, 0xff, PNG_FILLER_BEFORE); } if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) { png_set_swap_alpha (png_ptr); } frame_data = g_malloc (width * height * 4); frame = cog_frame_new_from_data_AYUV (frame_data, width, height); rowbytes = png_get_rowbytes (png_ptr, info_ptr); rows = (png_bytep *) g_malloc (sizeof (png_bytep) * height); for (j = 0; j < height; j++) { rows[j] = COG_FRAME_DATA_GET_LINE (frame->components + 0, j); } png_read_image (png_ptr, rows); g_free (rows); png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL); return frame; } static void extract_alpha (CogFrame * frame, void *_dest, int component, int j) { uint8_t *dest = _dest; uint8_t *src; int i; src = COG_FRAME_DATA_GET_LINE (frame->virt_frame1->components + 0, j); for (i = 0; i < frame->width; i++) { dest[i] = src[i * 4 + 0]; } } static CogFrame * cog_virt_frame_extract_alpha (CogFrame * frame) { CogFrame *virt_frame; /* FIXME check that frame is a real AYUV frame */ virt_frame = cog_frame_new_virtual (NULL, COG_FRAME_FORMAT_U8_444, frame->width, frame->height); virt_frame->virt_frame1 = frame; virt_frame->render_line = extract_alpha; return virt_frame; } static CogFrame * cog_frame_realize (CogFrame * frame) { CogFrame *dest; dest = cog_frame_clone (NULL, frame); cog_virt_frame_render (frame, dest); cog_frame_unref (frame); return dest; }