gstreamer/gst/videoflip/gstvideoflip.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.
*/
/*#define DEBUG_ENABLED */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gstvideoflip.h>
#include <videoflip.h>
/* elementfactory information */
static GstElementDetails videoflip_details = GST_ELEMENT_DETAILS (
"Video scaler",
"Filter/Effect/Video",
"Resizes video",
"Wim Taymans <wim.taymans@chello.be>"
);
/* GstVideoflip signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_METHOD,
/* FILL ME */
};
static void gst_videoflip_base_init (gpointer g_class);
static void gst_videoflip_class_init (GstVideoflipClass *klass);
static void gst_videoflip_init (GstVideoflip *videoflip);
static void gst_videoflip_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_videoflip_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_videoflip_chain (GstPad *pad, GstData *_data);
static GstCaps * gst_videoflip_get_capslist(void);
static GstElementClass *parent_class = NULL;
#define GST_TYPE_VIDEOFLIP_METHOD (gst_videoflip_method_get_type())
static GType
gst_videoflip_method_get_type(void)
{
static GType videoflip_method_type = 0;
static GEnumValue videoflip_methods[] = {
{ GST_VIDEOFLIP_METHOD_IDENTITY, "0", "Identity (no rotation)" },
{ GST_VIDEOFLIP_METHOD_90R, "1", "Rotate right 90 degrees" },
{ GST_VIDEOFLIP_METHOD_180, "2", "Rotate 180 degrees" },
{ GST_VIDEOFLIP_METHOD_90L, "3", "Rotate left 90 degrees" },
{ GST_VIDEOFLIP_METHOD_HORIZ, "4", "Flip horizontally" },
{ GST_VIDEOFLIP_METHOD_VERT, "5", "Flip vertically" },
{ GST_VIDEOFLIP_METHOD_TRANS, "6", "Flip across upper left/lower right diagonal" },
{ GST_VIDEOFLIP_METHOD_OTHER, "7", "Flip across upper right/lower left diagonal" },
{ 0, NULL, NULL },
};
if(!videoflip_method_type){
videoflip_method_type = g_enum_register_static("GstVideoflipMethod",
videoflip_methods);
}
return videoflip_method_type;
}
static GstPadTemplate *
gst_videoflip_src_template_factory(void)
{
/* well, actually RGB too, but since there's no RGB format anyway */
GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], "
"framerate = (double) [ 0, MAX ]");
caps = gst_caps_intersect(caps, gst_videoflip_get_capslist ());
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
static GstPadTemplate *
gst_videoflip_sink_template_factory(void)
{
GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], "
"framerate = (double) [ 0, MAX ]");
caps = gst_caps_intersect(caps, gst_videoflip_get_capslist ());
return gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
}
GType
gst_videoflip_get_type (void)
{
static GType videoflip_type = 0;
if (!videoflip_type) {
static const GTypeInfo videoflip_info = {
sizeof(GstVideoflipClass),
gst_videoflip_base_init,
NULL,
(GClassInitFunc)gst_videoflip_class_init,
NULL,
NULL,
sizeof(GstVideoflip),
0,
(GInstanceInitFunc)gst_videoflip_init,
};
videoflip_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVideoflip", &videoflip_info, 0);
}
return videoflip_type;
}
static void
gst_videoflip_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &videoflip_details);
gst_element_class_add_pad_template (element_class,
gst_videoflip_sink_template_factory ());
gst_element_class_add_pad_template (element_class,
gst_videoflip_src_template_factory ());
}
static void
gst_videoflip_class_init (GstVideoflipClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_METHOD,
g_param_spec_enum("method","method","method",
GST_TYPE_VIDEOFLIP_METHOD, GST_VIDEOFLIP_METHOD_90R,
G_PARAM_READWRITE));
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videoflip_set_property;
gobject_class->get_property = gst_videoflip_get_property;
}
static GstCaps *
gst_videoflip_get_capslist(void)
{
GstCaps *caps;
GstStructure *structure;
int i;
caps = gst_caps_new_empty ();
for(i=0;i<videoflip_n_formats;i++){
structure = videoflip_get_cap (videoflip_formats + i);
gst_caps_append_structure (caps, structure);
}
return caps;
}
static GstCaps *
gst_videoflip_sink_getcaps (GstPad *pad)
{
GstVideoflip *videoflip;
GstCaps *capslist = NULL;
GstCaps *peercaps;
GstCaps *sizecaps;
GstCaps *caps;
int i;
GST_DEBUG ("gst_videoflip_sink_getcaps");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
/* get list of peer's caps */
if(pad == videoflip->srcpad){
peercaps = gst_pad_get_allowed_caps (videoflip->sinkpad);
}else{
peercaps = gst_pad_get_allowed_caps (videoflip->srcpad);
}
/* FIXME videoflip doesn't allow passthru of video formats it
* doesn't understand. */
/* Look through our list of caps and find those that match with
* the peer's formats. Create a list of them. */
for(i=0;i<videoflip_n_formats;i++){
GstCaps *fromcaps = gst_caps_new_full(videoflip_get_cap(
videoflip_formats + i), NULL);
if(gst_caps_is_always_compatible(fromcaps, peercaps)){
gst_caps_append(capslist, fromcaps);
}
}
gst_caps_free (peercaps);
sizecaps = gst_caps_from_string ("video/x-raw-yuv, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], "
"framerate = (double) [ 0, MAX ]");
caps = gst_caps_intersect(capslist, sizecaps);
gst_caps_free (sizecaps);
return caps;
}
static GstPadLinkReturn
gst_videoflip_src_link (GstPad *pad, const GstCaps *caps)
{
GstVideoflip *videoflip;
GstStructure *structure;
gboolean ret;
GST_DEBUG ("gst_videoflip_src_link");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
videoflip->format = videoflip_find_by_caps (caps);
g_return_val_if_fail(videoflip->format, GST_PAD_LINK_REFUSED);
ret = gst_structure_get_int (structure, "width", &videoflip->to_width);
ret &= gst_structure_get_int (structure, "height", &videoflip->to_height);
if (!ret) return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static GstPadLinkReturn
gst_videoflip_sink_link (GstPad *pad, const GstCaps *caps)
{
GstVideoflip *videoflip;
GstStructure *structure;
gboolean ret;
GST_DEBUG ("gst_videoflip_sink_link");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
videoflip->format = videoflip_find_by_caps (caps);
g_return_val_if_fail(videoflip->format, GST_PAD_LINK_REFUSED);
ret = gst_structure_get_int (structure, "width", &videoflip->from_width);
ret &= gst_structure_get_int (structure, "height", &videoflip->from_height);
if (!ret) return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static void
gst_videoflip_init (GstVideoflip *videoflip)
{
GST_DEBUG ("gst_videoflip_init");
videoflip->sinkpad = gst_pad_new_from_template (
gst_videoflip_sink_template_factory(),
"sink");
gst_element_add_pad(GST_ELEMENT(videoflip),videoflip->sinkpad);
gst_pad_set_chain_function(videoflip->sinkpad,gst_videoflip_chain);
gst_pad_set_link_function(videoflip->sinkpad,gst_videoflip_sink_link);
gst_pad_set_getcaps_function(videoflip->sinkpad,gst_videoflip_sink_getcaps);
videoflip->srcpad = gst_pad_new_from_template (
gst_videoflip_src_template_factory(),
"src");
gst_element_add_pad(GST_ELEMENT(videoflip),videoflip->srcpad);
gst_pad_set_link_function(videoflip->srcpad,gst_videoflip_src_link);
//gst_pad_set_getcaps_function(videoflip->srcpad,gst_videoflip_getcaps);
videoflip->inited = FALSE;
videoflip->force_size = FALSE;
}
static void
gst_videoflip_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstVideoflip *videoflip;
guchar *data;
gulong size;
GstBuffer *outbuf;
GST_DEBUG ("gst_videoflip_chain");
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
g_return_if_fail (videoflip->inited);
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
if(videoflip->passthru){
gst_pad_push(videoflip->srcpad, GST_DATA (buf));
return;
}
GST_DEBUG ("gst_videoflip_chain: got buffer of %ld bytes in '%s'",size,
GST_OBJECT_NAME (videoflip));
GST_DEBUG ("size=%ld from=%dx%d to=%dx%d fromsize=%ld (should be %d) tosize=%d",
size,
videoflip->from_width, videoflip->from_height,
videoflip->to_width, videoflip->to_height,
size, videoflip->from_buf_size,
videoflip->to_buf_size);
g_return_if_fail (size == videoflip->from_buf_size);
outbuf = gst_buffer_new();
/* FIXME: handle bufferpools */
GST_BUFFER_SIZE(outbuf) = videoflip->to_buf_size;
GST_BUFFER_DATA(outbuf) = g_malloc (videoflip->to_buf_size);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
g_return_if_fail(videoflip->format);
GST_DEBUG ("format %s",videoflip->format->fourcc);
g_return_if_fail(videoflip->format->scale);
videoflip->format->scale(videoflip, GST_BUFFER_DATA(outbuf), data);
GST_DEBUG ("gst_videoflip_chain: pushing buffer of %d bytes in '%s'",GST_BUFFER_SIZE(outbuf),
GST_OBJECT_NAME (videoflip));
gst_pad_push(videoflip->srcpad, GST_DATA (outbuf));
gst_buffer_unref(buf);
}
static void
gst_videoflip_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVideoflip *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOFLIP(object));
src = GST_VIDEOFLIP(object);
GST_DEBUG ("gst_videoflip_set_property");
switch (prop_id) {
case ARG_METHOD:
src->method = g_value_get_enum (value);
break;
default:
break;
}
}
static void
gst_videoflip_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVideoflip *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOFLIP(object));
src = GST_VIDEOFLIP(object);
switch (prop_id) {
case ARG_METHOD:
g_value_set_enum (value, src->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin *plugin)
{
return gst_element_register (plugin, "videoflip", GST_RANK_NONE, GST_TYPE_VIDEOFLIP);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoflip",
"Resizes video",
plugin_init,
VERSION,
GST_LICENSE,
GST_PACKAGE,
GST_ORIGIN
)