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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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454 lines
12 KiB
C
454 lines
12 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@entropywave.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include <cog/cog.h>
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#include <cog/cogvirtframe.h>
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#include <math.h>
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#include <png.h>
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#include "gstcogutils.h"
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#define GST_TYPE_LOGOINSERT \
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(gst_logoinsert_get_type())
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#define GST_LOGOINSERT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LOGOINSERT,GstLogoinsert))
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#define GST_LOGOINSERT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_LOGOINSERT,GstLogoinsertClass))
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#define GST_IS_LOGOINSERT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LOGOINSERT))
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#define GST_IS_LOGOINSERT_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_LOGOINSERT))
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typedef struct _GstLogoinsert GstLogoinsert;
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typedef struct _GstLogoinsertClass GstLogoinsertClass;
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struct _GstLogoinsert
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{
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GstBaseTransform base_transform;
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gchar *location;
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GstVideoFormat format;
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int width;
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int height;
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gchar *data;
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gsize size;
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CogFrame *overlay_frame;
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CogFrame *argb_frame;
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CogFrame *alpha_frame;
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};
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struct _GstLogoinsertClass
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{
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GstBaseTransformClass parent_class;
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};
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/* GstLogoinsert signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_LOCATION,
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};
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GType gst_logoinsert_get_type (void);
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static void gst_logoinsert_base_init (gpointer g_class);
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static void gst_logoinsert_class_init (gpointer g_class, gpointer class_data);
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static void gst_logoinsert_init (GTypeInstance * instance, gpointer g_class);
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static void gst_logoinsert_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_logoinsert_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_logoinsert_set_location (GstLogoinsert * li,
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const gchar * location);
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static gboolean gst_logoinsert_set_caps (GstBaseTransform * base_transform,
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GstCaps * incaps, GstCaps * outcaps);
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static GstFlowReturn gst_logoinsert_transform_ip (GstBaseTransform *
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base_transform, GstBuffer * buf);
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static CogFrame *cog_frame_new_from_png (void *data, int size);
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static CogFrame *cog_virt_frame_extract_alpha (CogFrame * frame);
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static CogFrame *cog_frame_realize (CogFrame * frame);
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static GstStaticPadTemplate gst_logoinsert_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
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);
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static GstStaticPadTemplate gst_logoinsert_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
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);
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GType
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gst_logoinsert_get_type (void)
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{
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static GType compress_type = 0;
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if (!compress_type) {
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static const GTypeInfo compress_info = {
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sizeof (GstLogoinsertClass),
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gst_logoinsert_base_init,
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NULL,
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gst_logoinsert_class_init,
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NULL,
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NULL,
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sizeof (GstLogoinsert),
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0,
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gst_logoinsert_init,
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};
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compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
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"GstLogoinsert", &compress_info, 0);
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}
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return compress_type;
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}
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static void
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gst_logoinsert_base_init (gpointer g_class)
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{
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static GstElementDetails compress_details =
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GST_ELEMENT_DETAILS ("Video Filter Template",
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"Filter/Effect/Video",
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"Template for a video filter",
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"David Schleef <ds@schleef.org>");
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_logoinsert_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_logoinsert_sink_template));
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gst_element_class_set_details (element_class, &compress_details);
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}
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static void
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gst_logoinsert_class_init (gpointer g_class, gpointer class_data)
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{
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GObjectClass *gobject_class;
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GstBaseTransformClass *base_transform_class;
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GstLogoinsertClass *filter_class;
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gobject_class = G_OBJECT_CLASS (g_class);
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base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class);
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filter_class = GST_LOGOINSERT_CLASS (g_class);
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gobject_class->set_property = gst_logoinsert_set_property;
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gobject_class->get_property = gst_logoinsert_get_property;
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g_object_class_install_property (gobject_class, ARG_LOCATION,
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g_param_spec_string ("location", "location",
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"location of PNG file to overlay", "", G_PARAM_READWRITE));
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base_transform_class->set_caps = gst_logoinsert_set_caps;
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base_transform_class->transform_ip = gst_logoinsert_transform_ip;
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}
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static void
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gst_logoinsert_init (GTypeInstance * instance, gpointer g_class)
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{
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GST_DEBUG ("gst_logoinsert_init");
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}
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static void
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gst_logoinsert_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstLogoinsert *src;
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g_return_if_fail (GST_IS_LOGOINSERT (object));
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src = GST_LOGOINSERT (object);
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GST_DEBUG ("gst_logoinsert_set_property");
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switch (prop_id) {
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case ARG_LOCATION:
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gst_logoinsert_set_location (src, g_value_get_string (value));
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break;
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default:
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break;
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}
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}
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static void
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gst_logoinsert_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstLogoinsert *src;
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g_return_if_fail (GST_IS_LOGOINSERT (object));
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src = GST_LOGOINSERT (object);
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switch (prop_id) {
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case ARG_LOCATION:
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g_value_set_string (value, src->location);
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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_logoinsert_set_caps (GstBaseTransform * base_transform,
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GstCaps * incaps, GstCaps * outcaps)
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{
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GstLogoinsert *li;
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g_return_val_if_fail (GST_IS_LOGOINSERT (base_transform), GST_FLOW_ERROR);
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li = GST_LOGOINSERT (base_transform);
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gst_video_format_parse_caps (incaps, &li->format, &li->width, &li->height);
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return TRUE;
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}
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static GstFlowReturn
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gst_logoinsert_transform_ip (GstBaseTransform * base_transform, GstBuffer * buf)
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{
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GstLogoinsert *li;
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CogFrame *frame;
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g_return_val_if_fail (GST_IS_LOGOINSERT (base_transform), GST_FLOW_ERROR);
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li = GST_LOGOINSERT (base_transform);
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frame = gst_cog_buffer_wrap (buf, li->format, li->width, li->height);
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if (li->argb_frame == NULL)
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return GST_FLOW_OK;
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if (li->overlay_frame == NULL) {
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CogFrame *f;
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f = cog_virt_frame_extract_alpha (cog_frame_ref (li->argb_frame));
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f = cog_virt_frame_new_subsample (f, frame->format,
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COG_CHROMA_SITE_MPEG2, 2);
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li->alpha_frame = cog_frame_realize (f);
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f = cog_virt_frame_new_unpack (cog_frame_ref (li->argb_frame));
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f = cog_virt_frame_new_color_matrix_RGB_to_YCbCr (f, COG_COLOR_MATRIX_SDTV,
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8);
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f = cog_virt_frame_new_subsample (f, frame->format,
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COG_CHROMA_SITE_MPEG2, 2);
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li->overlay_frame = cog_frame_realize (f);
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}
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if (1) {
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int i, j;
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int k;
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guint8 *dest;
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guint8 *src;
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guint8 *alpha;
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int offset_x, offset_y;
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for (k = 0; k < 3; k++) {
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offset_x = frame->components[k].width -
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li->alpha_frame->components[k].width;
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offset_y = frame->components[k].height -
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li->alpha_frame->components[k].height;
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for (j = 0; j < li->overlay_frame->components[k].height; j++) {
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dest = COG_FRAME_DATA_GET_LINE (frame->components + k, j + offset_y);
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src = COG_FRAME_DATA_GET_LINE (li->overlay_frame->components + k, j);
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alpha = COG_FRAME_DATA_GET_LINE (li->alpha_frame->components + k, j);
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#define oil_divide_255(x) ((((x)+128) + (((x)+128)>>8))>>8)
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for (i = 0; i < li->overlay_frame->components[k].width; i++) {
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dest[i + offset_x] =
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oil_divide_255 (src[i] * alpha[i] + dest[i + offset_x] * (255 -
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alpha[i]));
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}
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}
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}
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}
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return GST_FLOW_OK;
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}
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static void
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gst_logoinsert_set_location (GstLogoinsert * li, const gchar * location)
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{
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gboolean ret;
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GError *error = NULL;
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g_free (li->location);
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g_free (li->data);
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if (li->overlay_frame) {
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cog_frame_unref (li->overlay_frame);
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li->overlay_frame = NULL;
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}
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li->location = g_strdup (location);
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ret = g_file_get_contents (li->location, &li->data, &li->size, &error);
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if (!ret) {
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li->data = NULL;
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li->size = 0;
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return;
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}
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li->argb_frame = cog_frame_new_from_png (li->data, li->size);
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if (li->alpha_frame) {
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cog_frame_unref (li->alpha_frame);
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li->alpha_frame = NULL;
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}
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if (li->overlay_frame) {
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cog_frame_unref (li->overlay_frame);
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li->overlay_frame = NULL;
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}
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}
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/* load PNG into CogFrame */
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struct png_data_struct
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{
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unsigned char *data;
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int size;
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int offset;
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};
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static void
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read_data (png_structp png_ptr, png_bytep data, png_size_t length)
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{
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struct png_data_struct *s = png_get_io_ptr (png_ptr);
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memcpy (data, s->data + s->offset, length);
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s->offset += length;
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}
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static CogFrame *
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cog_frame_new_from_png (void *data, int size)
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{
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struct png_data_struct s = { 0 };
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png_structp png_ptr;
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png_infop info_ptr;
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png_bytep *rows;
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CogFrame *frame;
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guchar *frame_data;
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int rowbytes;
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int j;
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int width, height;
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int color_type;
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png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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info_ptr = png_create_info_struct (png_ptr);
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s.data = data;
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s.size = size;
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png_set_read_fn (png_ptr, (void *) &s, read_data);
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png_read_info (png_ptr, info_ptr);
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width = png_get_image_width (png_ptr, info_ptr);
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height = png_get_image_height (png_ptr, info_ptr);
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color_type = png_get_color_type (png_ptr, info_ptr);
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GST_DEBUG ("PNG size %dx%d color_type %d", width, height, color_type);
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png_set_strip_16 (png_ptr);
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png_set_packing (png_ptr);
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if (color_type == PNG_COLOR_TYPE_RGB) {
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png_set_filler (png_ptr, 0xff, PNG_FILLER_BEFORE);
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}
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if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
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png_set_swap_alpha (png_ptr);
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}
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frame_data = g_malloc (width * height * 4);
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frame = cog_frame_new_from_data_ARGB (frame_data, width, height);
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rowbytes = png_get_rowbytes (png_ptr, info_ptr);
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rows = (png_bytep *) g_malloc (sizeof (png_bytep) * height);
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for (j = 0; j < height; j++) {
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rows[j] = COG_FRAME_DATA_GET_LINE (frame->components + 0, j);
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}
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png_read_image (png_ptr, rows);
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g_free (rows);
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png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL);
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return frame;
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}
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static void
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extract_alpha (CogFrame * frame, void *_dest, int component, int j)
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{
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uint8_t *dest = _dest;
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uint8_t *src;
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int i;
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src = COG_FRAME_DATA_GET_LINE (frame->virt_frame1->components + 0, j);
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for (i = 0; i < frame->width; i++) {
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dest[i] = src[i * 4 + 0];
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}
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}
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static CogFrame *
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cog_virt_frame_extract_alpha (CogFrame * frame)
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{
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CogFrame *virt_frame;
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/* FIXME check that frame is a real AYUV frame */
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virt_frame = cog_frame_new_virtual (NULL, COG_FRAME_FORMAT_U8_444,
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frame->width, frame->height);
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virt_frame->virt_frame1 = frame;
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virt_frame->render_line = extract_alpha;
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return virt_frame;
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}
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static CogFrame *
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cog_frame_realize (CogFrame * frame)
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{
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CogFrame *dest;
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dest = cog_frame_clone (NULL, frame);
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cog_virt_frame_render (frame, dest);
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cog_frame_unref (frame);
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return dest;
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}
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