gstreamer/gst/smpte/gstsmpte.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <string.h>
#include "gstsmpte.h"
#include <gst/video/video.h>
#include "paint.h"
/* elementfactory information */
static GstElementDetails smpte_details = {
"SMPTE transitions",
"Filter/Editor/Video",
"Apply the standard SMPTE transitions on video images",
"Wim Taymans <wim.taymans@chello.be>"
};
static GstStaticPadTemplate gst_smpte_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")
)
);
static GstStaticPadTemplate gst_smpte_sink1_template =
GST_STATIC_PAD_TEMPLATE ("sink1",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")
)
);
static GstStaticPadTemplate gst_smpte_sink2_template =
GST_STATIC_PAD_TEMPLATE ("sink2",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")
)
);
/* SMPTE signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_TYPE,
ARG_BORDER,
ARG_DEPTH,
ARG_FPS
};
#define GST_TYPE_SMPTE_TRANSITION_TYPE (gst_smpte_transition_type_get_type())
static GType
gst_smpte_transition_type_get_type (void)
{
static GType smpte_transition_type = 0;
GEnumValue *smpte_transitions;
if (!smpte_transition_type) {
const GList *definitions;
gint i = 0;
definitions = gst_mask_get_definitions ();
smpte_transitions =
g_new0 (GEnumValue, g_list_length ((GList *) definitions) + 1);
while (definitions) {
GstMaskDefinition *definition = (GstMaskDefinition *) definitions->data;
definitions = g_list_next (definitions);
smpte_transitions[i].value = definition->type;
smpte_transitions[i].value_name = definition->short_name;
smpte_transitions[i].value_nick = definition->long_name;
i++;
}
smpte_transition_type =
g_enum_register_static ("GstSMPTETransitionType", smpte_transitions);
}
return smpte_transition_type;
}
static void gst_smpte_class_init (GstSMPTEClass * klass);
static void gst_smpte_base_init (GstSMPTEClass * klass);
static void gst_smpte_init (GstSMPTE * smpte);
static void gst_smpte_loop (GstElement * element);
static void gst_smpte_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_smpte_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
/*static guint gst_smpte_signals[LAST_SIGNAL] = { 0 }; */
static GType
gst_smpte_get_type (void)
{
static GType smpte_type = 0;
if (!smpte_type) {
static const GTypeInfo smpte_info = {
sizeof (GstSMPTEClass),
(GBaseInitFunc) gst_smpte_base_init,
NULL,
(GClassInitFunc) gst_smpte_class_init,
NULL,
NULL,
sizeof (GstSMPTE),
0,
(GInstanceInitFunc) gst_smpte_init,
};
smpte_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstSMPTE", &smpte_info, 0);
}
return smpte_type;
}
static void
gst_smpte_base_init (GstSMPTEClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smpte_sink1_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smpte_sink2_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smpte_src_template));
gst_element_class_set_details (element_class, &smpte_details);
}
static void
gst_smpte_class_init (GstSMPTEClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_smpte_set_property;
gobject_class->get_property = gst_smpte_get_property;
_gst_mask_init ();
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TYPE,
g_param_spec_enum ("type", "Type", "The type of transition to use",
GST_TYPE_SMPTE_TRANSITION_TYPE, 1, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FPS,
g_param_spec_float ("fps", "FPS",
"Frames per second if no input files are given", 0., G_MAXFLOAT, 25.,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BORDER,
g_param_spec_int ("border", "Border",
"The border width of the transition", 0, G_MAXINT, 0,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEPTH,
g_param_spec_int ("depth", "Depth", "Depth of the mask in bits", 1, 24,
16, G_PARAM_READWRITE));
}
/* wht yel cya grn mag red blu blk -I Q */
static int y_colors[] = { 255, 226, 179, 150, 105, 76, 29, 16, 16, 0 };
static int u_colors[] = { 128, 0, 170, 46, 212, 85, 255, 128, 0, 128 };
static int v_colors[] = { 128, 155, 0, 21, 235, 255, 107, 128, 128, 255 };
static void
fill_i420 (guint8 * data, gint width, gint height, gint color)
{
gint size = width * height, size4 = size >> 2;
guint8 *yp = data;
guint8 *up = data + size;
guint8 *vp = data + size + size4;
memset (yp, y_colors[color], size);
memset (up, u_colors[color], size4);
memset (vp, v_colors[color], size4);
}
static gboolean
gst_smpte_update_mask (GstSMPTE * smpte, gint type, gint depth, gint width,
gint height)
{
GstMask *newmask;
newmask = gst_mask_factory_new (type, depth, width, height);
if (newmask) {
if (smpte->mask) {
gst_mask_destroy (smpte->mask);
}
smpte->mask = newmask;
smpte->type = type;
smpte->depth = depth;
smpte->width = width;
smpte->height = height;
return TRUE;
}
return FALSE;
}
static gboolean
gst_smpte_sinkconnect (GstPad * pad, const GstCaps * caps)
{
GstSMPTE *smpte;
GstStructure *structure;
gboolean ret;
smpte = GST_SMPTE (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &smpte->width);
ret &= gst_structure_get_int (structure, "height", &smpte->height);
ret &= gst_structure_get_double (structure, "framerate", &smpte->fps);
if (!ret)
return GST_PAD_LINK_REFUSED;
gst_smpte_update_mask (smpte, smpte->type, smpte->depth, smpte->width,
smpte->height);
/* forward to the next plugin */
return gst_pad_try_set_caps (smpte->srcpad, caps);
}
static void
gst_smpte_init (GstSMPTE * smpte)
{
smpte->sinkpad1 =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_smpte_sink1_template), "sink1");
gst_pad_set_link_function (smpte->sinkpad1, gst_smpte_sinkconnect);
gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad1);
smpte->sinkpad2 =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_smpte_sink2_template), "sink2");
gst_pad_set_link_function (smpte->sinkpad2, gst_smpte_sinkconnect);
gst_element_add_pad (GST_ELEMENT (smpte), smpte->sinkpad2);
smpte->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_smpte_src_template), "src");
gst_element_add_pad (GST_ELEMENT (smpte), smpte->srcpad);
gst_element_set_loop_function (GST_ELEMENT (smpte), gst_smpte_loop);
smpte->width = 320;
smpte->height = 200;
smpte->fps = 25.;
smpte->duration = 64;
smpte->position = 0;
smpte->type = 1;
smpte->border = 0;
smpte->depth = 16;
gst_smpte_update_mask (smpte, smpte->type, smpte->depth, smpte->width,
smpte->height);
}
static void
gst_smpte_blend_i420 (guint8 * in1, guint8 * in2, guint8 * out, GstMask * mask,
gint width, gint height, gint border, gint pos)
{
guint32 *maskp;
gint value;
gint i, j;
gint min, max;
guint8 *in1u, *in1v, *in2u, *in2v, *outu, *outv;
gint lumsize = width * height;
gint chromsize = lumsize >> 2;
if (border == 0)
border++;
min = pos - border;
max = pos;
in1u = in1 + lumsize;
in1v = in1u + chromsize;
in2u = in2 + lumsize;
in2v = in2u + chromsize;
outu = out + lumsize;
outv = outu + chromsize;
maskp = mask->data;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
value = *maskp++;
value = ((CLAMP (value, min, max) - min) << 8) / border;
*out++ = ((*in1++ * value) + (*in2++ * (256 - value))) >> 8;
if (!(i & 1) && !(j & 1)) {
*outu++ = ((*in1u++ * value) + (*in2u++ * (256 - value))) >> 8;
*outv++ = ((*in1v++ * value) + (*in2v++ * (256 - value))) >> 8;
}
}
}
}
static void
gst_smpte_loop (GstElement * element)
{
GstSMPTE *smpte;
GstBuffer *outbuf;
GstClockTime ts;
GstBuffer *in1 = NULL, *in2 = NULL;
smpte = GST_SMPTE (element);
ts = smpte->position * GST_SECOND / smpte->fps;
while (GST_PAD_IS_USABLE (smpte->sinkpad1) && in1 == NULL) {
in1 = GST_BUFFER (gst_pad_pull (smpte->sinkpad1));
if (GST_IS_EVENT (in1)) {
gst_pad_push (smpte->srcpad, GST_DATA (in1));
in1 = NULL;
} else
ts = GST_BUFFER_TIMESTAMP (in1);
}
if (GST_PAD_IS_USABLE (smpte->sinkpad2) && in2 == NULL) {
in2 = GST_BUFFER (gst_pad_pull (smpte->sinkpad2));
if (GST_IS_EVENT (in2)) {
gst_pad_push (smpte->srcpad, GST_DATA (in2));
in2 = NULL;
} else
ts = GST_BUFFER_TIMESTAMP (in2);
}
if (in1 == NULL) {
in1 = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
fill_i420 (GST_BUFFER_DATA (in1), smpte->width, smpte->height, 7);
}
if (in2 == NULL) {
in2 = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
fill_i420 (GST_BUFFER_DATA (in2), smpte->width, smpte->height, 0);
}
if (smpte->position < smpte->duration) {
outbuf = gst_buffer_new_and_alloc (smpte->width * smpte->height * 3);
if (!GST_PAD_CAPS (smpte->srcpad)) {
GstCaps *caps;
caps =
gst_caps_copy (gst_static_caps_get (&gst_smpte_src_template.
static_caps));
gst_caps_set_simple (caps, "width", G_TYPE_INT, smpte->width, "height",
G_TYPE_INT, smpte->height, "framerate", G_TYPE_DOUBLE, smpte->fps,
NULL);
if (!gst_pad_try_set_caps (smpte->srcpad, caps)) {
GST_ELEMENT_ERROR (smpte, CORE, NEGOTIATION, (NULL), (NULL));
return;
}
}
gst_smpte_blend_i420 (GST_BUFFER_DATA (in1),
GST_BUFFER_DATA (in2),
GST_BUFFER_DATA (outbuf),
smpte->mask, smpte->width, smpte->height,
smpte->border,
((1 << smpte->depth) + smpte->border) *
smpte->position / smpte->duration);
} else {
outbuf = in2;
gst_buffer_ref (in2);
}
smpte->position++;
if (in1)
gst_buffer_unref (in1);
if (in2)
gst_buffer_unref (in2);
GST_BUFFER_TIMESTAMP (outbuf) = ts;
gst_pad_push (smpte->srcpad, GST_DATA (outbuf));
}
static void
gst_smpte_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSMPTE *smpte;
smpte = GST_SMPTE (object);
switch (prop_id) {
case ARG_TYPE:
{
gint type = g_value_get_enum (value);
gst_smpte_update_mask (smpte, type, smpte->depth,
smpte->width, smpte->height);
break;
}
case ARG_BORDER:
smpte->border = g_value_get_int (value);
break;
case ARG_FPS:
smpte->fps = g_value_get_float (value);
break;
case ARG_DEPTH:
{
gint depth = g_value_get_int (value);
gst_smpte_update_mask (smpte, smpte->type, depth,
smpte->width, smpte->height);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_smpte_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSMPTE *smpte;
smpte = GST_SMPTE (object);
switch (prop_id) {
case ARG_TYPE:
if (smpte->mask) {
g_value_set_enum (value, smpte->mask->type);
}
break;
case ARG_FPS:
g_value_set_float (value, smpte->fps);
break;
case ARG_BORDER:
g_value_set_int (value, smpte->border);
break;
case ARG_DEPTH:
g_value_set_int (value, smpte->depth);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "smpte", GST_RANK_NONE, GST_TYPE_SMPTE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"smpte",
"Apply the standard SMPTE transitions on video images",
plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)