mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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378 lines
9.5 KiB
C
378 lines
9.5 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* EffecTV:
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* Copyright (C) 2001 FUKUCHI Kentarou
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*
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* EffecTV is free software. This library is free software;
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* 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/video/gstvideofilter.h>
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#include <math.h>
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#include <string.h>
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#include <gst/video/video.h>
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#define GST_TYPE_QUARKTV \
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(gst_quarktv_get_type())
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#define GST_QUARKTV(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUARKTV,GstQuarkTV))
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#define GST_QUARKTV_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUARKTV,GstQuarkTVClass))
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#define GST_IS_QUARKTV(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUARKTV))
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#define GST_IS_QUARKTV_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUARKTV))
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/* number of frames of time-buffer. It should be as a configurable paramater */
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/* This number also must be 2^n just for the speed. */
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#define PLANES 16
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typedef struct _GstQuarkTV GstQuarkTV;
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typedef struct _GstQuarkTVClass GstQuarkTVClass;
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struct _GstQuarkTV
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{
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GstVideoFilter element;
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gint width, height;
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gint area;
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gint planes;
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gint current_plane;
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GstBuffer **planetable;
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};
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struct _GstQuarkTVClass
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{
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GstVideoFilterClass parent_class;
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};
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enum
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{
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ARG_0,
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ARG_PLANES
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};
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GType gst_quarktv_get_type (void);
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static void gst_quarktv_planetable_clear (GstQuarkTV * filter);
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static const GstElementDetails quarktv_details =
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GST_ELEMENT_DETAILS ("QuarkTV effect",
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"Filter/Effect/Video",
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"Motion dissolver",
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"FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
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static GstStaticPadTemplate gst_quarktv_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_BGRx "; " GST_VIDEO_CAPS_RGBx)
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);
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static GstStaticPadTemplate gst_quarktv_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_BGRx "; " GST_VIDEO_CAPS_RGBx)
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);
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static GstVideoFilterClass *parent_class = NULL;
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static gboolean
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gst_quarktv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstQuarkTV *filter = GST_QUARKTV (btrans);
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GstStructure *structure;
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gboolean ret = FALSE;
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structure = gst_caps_get_structure (incaps, 0);
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if (gst_structure_get_int (structure, "width", &filter->width) &&
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gst_structure_get_int (structure, "height", &filter->height)) {
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gst_quarktv_planetable_clear (filter);
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filter->area = filter->width * filter->height;
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ret = TRUE;
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}
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return ret;
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}
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static gboolean
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gst_quarktv_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
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guint * size)
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{
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GstQuarkTV *filter;
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GstStructure *structure;
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gboolean ret = FALSE;
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gint width, height;
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filter = GST_QUARKTV (btrans);
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structure = gst_caps_get_structure (caps, 0);
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if (gst_structure_get_int (structure, "width", &width) &&
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gst_structure_get_int (structure, "height", &height)) {
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*size = width * height * 32 / 8;
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ret = TRUE;
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GST_DEBUG_OBJECT (filter, "our frame size is %d bytes (%dx%d)", *size,
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width, height);
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}
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return ret;
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}
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static inline guint32
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fastrand (void)
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{
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static unsigned int fastrand_val;
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return (fastrand_val = fastrand_val * 1103515245 + 12345);
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}
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static GstFlowReturn
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gst_quarktv_transform (GstBaseTransform * trans, GstBuffer * in,
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GstBuffer * out)
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{
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GstQuarkTV *filter;
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gint area;
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guint32 *dest;
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GstFlowReturn ret = GST_FLOW_OK;
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filter = GST_QUARKTV (trans);
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gst_buffer_copy_metadata (out, in, GST_BUFFER_COPY_TIMESTAMPS);
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area = filter->area;
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dest = (guint32 *) GST_BUFFER_DATA (out);
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if (G_UNLIKELY (filter->planetable == NULL))
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return GST_FLOW_WRONG_STATE;
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if (filter->planetable[filter->current_plane])
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gst_buffer_unref (filter->planetable[filter->current_plane]);
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filter->planetable[filter->current_plane] = gst_buffer_ref (in);
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/* For each pixel */
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while (--area) {
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GstBuffer *rand;
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/* pick a random buffer */
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rand =
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filter->planetable[(filter->current_plane +
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(fastrand () >> 24)) & (filter->planes - 1)];
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/* Copy the pixel from the random buffer to dest */
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dest[area] = (rand ? ((guint32 *) GST_BUFFER_DATA (rand))[area] : 0);
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}
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filter->current_plane--;
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if (filter->current_plane < 0)
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filter->current_plane = filter->planes - 1;
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return ret;
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}
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static void
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gst_quarktv_planetable_clear (GstQuarkTV * filter)
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{
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gint i;
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if (filter->planetable == NULL)
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return;
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for (i = 0; i < filter->planes; i++) {
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if (GST_IS_BUFFER (filter->planetable[i])) {
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gst_buffer_unref (filter->planetable[i]);
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}
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filter->planetable[i] = NULL;
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}
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}
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static GstStateChangeReturn
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gst_quarktv_change_state (GstElement * element, GstStateChange transition)
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{
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GstQuarkTV *filter = GST_QUARKTV (element);
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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{
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filter->planetable =
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(GstBuffer **) g_malloc0 (filter->planes * sizeof (GstBuffer *));
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break;
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}
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default:
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break;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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{
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gst_quarktv_planetable_clear (filter);
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g_free (filter->planetable);
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filter->planetable = NULL;
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break;
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}
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default:
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break;
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}
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return ret;
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}
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static void
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gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstQuarkTV *filter;
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g_return_if_fail (GST_IS_QUARKTV (object));
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filter = GST_QUARKTV (object);
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switch (prop_id) {
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case ARG_PLANES:
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{
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gint new_n_planes = g_value_get_int (value);
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GstBuffer **new_planetable;
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gint i;
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/* If the number of planes changed, copy across any existing planes */
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if (new_n_planes != filter->planes) {
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new_planetable =
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(GstBuffer **) g_malloc (new_n_planes * sizeof (GstBuffer *));
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for (i = 0; (i < new_n_planes) && (i < filter->planes); i++) {
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new_planetable[i] = filter->planetable[i];
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}
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for (; i < filter->planes; i++) {
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if (filter->planetable[i])
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gst_buffer_unref (filter->planetable[i]);
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}
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g_free (filter->planetable);
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filter->planetable = new_planetable;
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filter->current_plane = filter->planes - 1;
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filter->planes = new_n_planes;
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}
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}
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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_quarktv_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstQuarkTV *filter;
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g_return_if_fail (GST_IS_QUARKTV (object));
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filter = GST_QUARKTV (object);
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switch (prop_id) {
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case ARG_PLANES:
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g_value_set_int (value, filter->planes);
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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_quarktv_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details (element_class, &quarktv_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_quarktv_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_quarktv_src_template));
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}
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static void
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gst_quarktv_class_init (gpointer klass, gpointer class_data)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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GstBaseTransformClass *trans_class;
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gobject_class = (GObjectClass *) klass;
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element_class = (GstElementClass *) klass;
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trans_class = (GstBaseTransformClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_quarktv_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_quarktv_get_property);
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_quarktv_change_state);
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trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_quarktv_set_caps);
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trans_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_quarktv_get_unit_size);
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trans_class->transform = GST_DEBUG_FUNCPTR (gst_quarktv_transform);
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}
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static void
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gst_quarktv_init (GTypeInstance * instance, gpointer g_class)
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{
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GstQuarkTV *filter = GST_QUARKTV (instance);
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filter->planes = PLANES;
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filter->current_plane = filter->planes - 1;
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}
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GType
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gst_quarktv_get_type (void)
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{
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static GType quarktv_type = 0;
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if (!quarktv_type) {
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static const GTypeInfo quarktv_info = {
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sizeof (GstQuarkTVClass),
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gst_quarktv_base_init,
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NULL,
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gst_quarktv_class_init,
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NULL,
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NULL,
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sizeof (GstQuarkTV),
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0,
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gst_quarktv_init,
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};
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quarktv_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
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"GstQuarkTV", &quarktv_info, 0);
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}
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return quarktv_type;
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}
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