mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-03-30 12:49:40 +00:00
Code Issues 1 Projects Releases Wiki Activity

Add aspectratiocrop element. Fixes bug #527951

Browse source 
Add new aspectratiocrop element that crops the video
to a specified aspect ratio using videocrop.
This commit is contained in:
Thijs Vermeir 2009-01-23 15:39:46 +01:00
parent 1b82293248
commit c1cb1e0c5b
4 changed files with 419 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
gst/videocrop/Makefile.am
View file

@ -3,11 +3,11 @@ plugin_LTLIBRARIES = libgstvideocrop.la
# Note: we only use defines from gst/video/video.h, but none
# of the functions, so we don't need to link to libgstvideo
libgstvideocrop_la_SOURCES = gstvideocrop.c
libgstvideocrop_la_SOURCES = gstvideocrop.c gstaspectratiocrop.c
libgstvideocrop_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS)
libgstvideocrop_la_LIBADD = $(GST_BASE_LIBS)
libgstvideocrop_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstvideocrop_la_LIBTOOLFLAGS = --tag=disable-static
noinst_HEADERS = gstvideocrop.h
noinst_HEADERS = gstvideocrop.h gstaspectratiocrop.h

342
gst/videocrop/gstaspectratiocrop.c Normal file
View file

@ -0,0 +1,342 @@
/* GStreamer video frame cropping to aspect-ratio
* Copyright (C) 2009 Thijs Vermeir <thijsvermeir@gmail.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/video/video.h>
#include "gstaspectratiocrop.h"
GST_DEBUG_CATEGORY_STATIC (aspect_ratio_crop_debug);
#define GST_CAT_DEFAULT aspect_ratio_crop_debug
static const GstElementDetails aspect_ratio_crop_details =
GST_ELEMENT_DETAILS ("aspectratiocrop",
"Filter/Effect/Video",
"Crops video into a user-defined aspect-ratio",
"Thijs Vermeir <thijsvermeir@gmail.com>");
enum
{
ARG_0,
ARG_ASPECT_RATIO_CROP,
};
/* we support the same caps as videocrop */
#define ASPECT_RATIO_CROP_CAPS \
GST_VIDEO_CAPS_RGBx ";" \
GST_VIDEO_CAPS_xRGB ";" \
GST_VIDEO_CAPS_BGRx ";" \
GST_VIDEO_CAPS_xBGR ";" \
GST_VIDEO_CAPS_RGBA ";" \
GST_VIDEO_CAPS_ARGB ";" \
GST_VIDEO_CAPS_BGRA ";" \
GST_VIDEO_CAPS_ABGR ";" \
GST_VIDEO_CAPS_RGB ";" \
GST_VIDEO_CAPS_BGR ";" \
GST_VIDEO_CAPS_YUV ("AYUV") ";" \
GST_VIDEO_CAPS_YUV ("YUY2") ";" \
GST_VIDEO_CAPS_YUV ("YVYU") ";" \
GST_VIDEO_CAPS_YUV ("UYVY") ";" \
GST_VIDEO_CAPS_YUV ("Y800") ";" \
GST_VIDEO_CAPS_YUV ("I420") ";" \
GST_VIDEO_CAPS_YUV ("YV12") ";" \
GST_VIDEO_CAPS_RGB_16 ";" \
GST_VIDEO_CAPS_RGB_15
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (ASPECT_RATIO_CROP_CAPS)
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (ASPECT_RATIO_CROP_CAPS)
);
GST_BOILERPLATE (GstAspectRatioCrop, gst_aspect_ratio_crop, GstBin,
GST_TYPE_BIN);
static void gst_aspect_ratio_crop_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_aspect_ratio_crop_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_aspect_ratio_crop_set_cropping (GstAspectRatioCrop *
aspect_ratio_crop, gint top, gint right, gint bottom, gint left);
static gboolean gst_aspect_ratio_crop_set_caps (GstPad * pad, GstCaps * caps);
static void
gst_aspect_ratio_crop_set_cropping (GstAspectRatioCrop * aspect_ratio_crop,
gint top, gint right, gint bottom, gint left)
{
GValue value = { 0 };
if (G_UNLIKELY (!aspect_ratio_crop->videocrop)) {
GST_WARNING_OBJECT (aspect_ratio_crop,
"Can't set the settings if there is no cropping element");
return;
}
g_value_init (&value, G_TYPE_INT);
g_value_set_int (&value, top);
GST_DEBUG_OBJECT (aspect_ratio_crop, "set top cropping to: %d", top);
g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "top",
&value);
g_value_set_int (&value, right);
GST_DEBUG_OBJECT (aspect_ratio_crop, "set right cropping to: %d", right);
g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "right",
&value);
g_value_set_int (&value, bottom);
GST_DEBUG_OBJECT (aspect_ratio_crop, "set bottom cropping to: %d", bottom);
g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "bottom",
&value);
g_value_set_int (&value, left);
GST_DEBUG_OBJECT (aspect_ratio_crop, "set left cropping to: %d", left);
g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "left",
&value);
g_value_unset (&value);
}
static gboolean
gst_aspect_ratio_crop_set_caps (GstPad * pad, GstCaps * caps)
{
GstAspectRatioCrop *aspect_ratio_crop;
GstPad *peer_pad;
GstStructure *structure;
gboolean ret;
gdouble incoming_ar;
gdouble requested_ar;
gint width, height;
gint cropvalue;
gint par_d, par_n;
aspect_ratio_crop = GST_ASPECT_RATIO_CROP (gst_pad_get_parent (pad));
g_mutex_lock (aspect_ratio_crop->crop_lock);
/* Check if we need to change the aspect ratio */
if (aspect_ratio_crop->ar_num < 1) {
GST_DEBUG_OBJECT (aspect_ratio_crop, "No cropping requested");
gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, 0, 0, 0);
goto setcaps_on_peer;
}
/* get the information from the caps */
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &width))
goto no_width;
if (!gst_structure_get_int (structure, "height", &height))
goto no_height;
if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
&par_n, &par_d)) {
par_d = par_n = 1;
}
incoming_ar = ((gdouble) (width * par_n)) / (height * par_d);
GST_LOG_OBJECT (aspect_ratio_crop,
"incoming caps width(%d), height(%d), par (%d/%d) : ar = %f", width,
height, par_n, par_d, incoming_ar);
requested_ar =
(gdouble) aspect_ratio_crop->ar_num / aspect_ratio_crop->ar_denom;
/* check if the original aspect-ratio is the aspect-ratio that we want */
if (requested_ar == incoming_ar) {
GST_DEBUG_OBJECT (aspect_ratio_crop,
"Input video already has the correct aspect ratio (%.3f == %.3f)",
incoming_ar, requested_ar);
gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, 0, 0, 0);
} else if (requested_ar > incoming_ar) {
/* fix aspect ratio with cropping on top and bottom */
cropvalue =
((((double) aspect_ratio_crop->ar_denom /
(double) (aspect_ratio_crop->ar_num)) * ((double) par_n /
(double) par_d) * width) - height) / 2;
if (cropvalue < 0) {
cropvalue *= -1;
}
if (cropvalue >= (height / 2))
goto crop_failed;
gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, cropvalue, 0,
cropvalue, 0);
} else {
/* fix aspect ratio with cropping on left and right */
cropvalue =
((((double) aspect_ratio_crop->ar_num /
(double) (aspect_ratio_crop->ar_denom)) * ((double) par_d /
(double) par_n) * height) - width) / 2;
if (cropvalue < 0) {
cropvalue *= -1;
}
if (cropvalue >= (width / 2))
goto crop_failed;
gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, cropvalue, 0,
cropvalue);
}
setcaps_on_peer:
GST_DEBUG_OBJECT (aspect_ratio_crop,
"setting the caps on the videocrop element");
peer_pad =
gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
"sink");
ret = gst_pad_set_caps (peer_pad, caps);
gst_object_unref (peer_pad);
gst_object_unref (aspect_ratio_crop);
g_mutex_unlock (aspect_ratio_crop->crop_lock);
return ret;
no_width:
GST_INFO_OBJECT (aspect_ratio_crop, "no width found in the caps");
goto beach;
no_height:
GST_INFO_OBJECT (aspect_ratio_crop, "no height found in the caps");
goto beach;
crop_failed:
GST_WARNING_OBJECT (aspect_ratio_crop,
"can't crop to aspect ratio requested");
goto beach;
beach:
gst_object_unref (aspect_ratio_crop);
g_mutex_unlock (aspect_ratio_crop->crop_lock);
return FALSE;
}
static void
gst_aspect_ratio_crop_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &aspect_ratio_crop_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_aspect_ratio_crop_class_init (GstAspectRatioCropClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_aspect_ratio_crop_set_property;
gobject_class->get_property = gst_aspect_ratio_crop_get_property;
g_object_class_install_property (gobject_class, ARG_ASPECT_RATIO_CROP,
gst_param_spec_fraction ("aspect-ratio", "aspect-ratio",
"Target aspect-ratio of video", 0, 1, G_MAXINT, 1, 0, 1,
G_PARAM_READWRITE));
}
static void
gst_aspect_ratio_crop_init (GstAspectRatioCrop * aspect_ratio_crop,
GstAspectRatioCropClass * klass)
{
GstPad *link_pad;
GST_DEBUG_CATEGORY_INIT (aspect_ratio_crop_debug, "aspectratiocrop", 0,
"aspectratiocrop");
aspect_ratio_crop->ar_num = 0;
aspect_ratio_crop->ar_denom = 1;
aspect_ratio_crop->crop_lock = g_mutex_new ();
/* add the transform element */
aspect_ratio_crop->videocrop = gst_element_factory_make ("videocrop", NULL);
gst_bin_add (GST_BIN (aspect_ratio_crop), aspect_ratio_crop->videocrop);
/* create ghost pad src */
link_pad =
gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
"src");
gst_element_add_pad (GST_ELEMENT (aspect_ratio_crop), gst_ghost_pad_new (NULL,
link_pad));
gst_object_unref (link_pad);
/* create ghost pad sink */
link_pad =
gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
"sink");
aspect_ratio_crop->sink = gst_ghost_pad_new (NULL, link_pad);
gst_element_add_pad (GST_ELEMENT (aspect_ratio_crop),
aspect_ratio_crop->sink);
gst_object_unref (link_pad);
gst_pad_set_setcaps_function (aspect_ratio_crop->sink,
GST_DEBUG_FUNCPTR (gst_aspect_ratio_crop_set_caps));
}
static void
gst_aspect_ratio_crop_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAspectRatioCrop *aspect_ratio_crop;
gboolean recheck = FALSE;
aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object);
GST_OBJECT_LOCK (aspect_ratio_crop);
switch (prop_id) {
case ARG_ASPECT_RATIO_CROP:
if (GST_VALUE_HOLDS_FRACTION (value)) {
aspect_ratio_crop->ar_num = gst_value_get_fraction_numerator (value);
aspect_ratio_crop->ar_denom =
gst_value_get_fraction_denominator (value);
recheck = TRUE;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (aspect_ratio_crop);
if (recheck) {
gst_aspect_ratio_crop_set_caps (aspect_ratio_crop->sink,
GST_PAD_CAPS (aspect_ratio_crop->sink));
}
}
static void
gst_aspect_ratio_crop_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAspectRatioCrop *aspect_ratio_crop;
aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object);
GST_OBJECT_LOCK (aspect_ratio_crop);
switch (prop_id) {
case ARG_ASPECT_RATIO_CROP:
gst_value_set_fraction (value, aspect_ratio_crop->ar_num,
aspect_ratio_crop->ar_denom);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (aspect_ratio_crop);
}

67
gst/videocrop/gstaspectratiocrop.h Normal file
View file

@ -0,0 +1,67 @@
/* GStreamer video frame cropping to aspect-ratio
* Copyright (C) 2009 Thijs Vermeir <thijsvermeir@gmail.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.
*/
#ifndef __GST_ASPECT_RATIO_CROP_H__
#define __GST_ASPECT_RATIO_CROP_H__
#include <gst/gstbin.h>
G_BEGIN_DECLS
#define GST_TYPE_ASPECT_RATIO_CROP \
(gst_aspect_ratio_crop_get_type())
#define GST_ASPECT_RATIO_CROP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ASPECT_RATIO_CROP,GstAspectRatioCrop))
#define GST_ASPECT_RATIO_CROP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ASPECT_RATIO_CROP,GstAspectRatioCropClass))
#define GST_IS_ASPECT_RATIO_CROP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ASPECT_RATIO_CROP))
#define GST_IS_ASPECT_RATIO_CROP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ASPECT_RATIO_CROP))
typedef struct _GstAspectRatioCrop GstAspectRatioCrop;
typedef struct _GstAspectRatioCropClass GstAspectRatioCropClass;
struct _GstAspectRatioCrop
{
GstBin parent;
/* our videocrop element */
GstElement *videocrop;
GstPad *sink;
/* target aspect ratio */
gint ar_num; /* if < 1 then don't change ar */
gint ar_denom;
GMutex *crop_lock;
};
struct _GstAspectRatioCropClass
{
GstBinClass parent_class;
};
GType gst_aspect_ratio_crop_get_type (void);
G_END_DECLS
#endif /* __GST_ASPECT_RATIO_CROP_H__ */

10
gst/videocrop/gstvideocrop.c
View file

@ -67,6 +67,7 @@
#include <gst/video/video.h>
#include "gstvideocrop.h"
#include "gstaspectratiocrop.h"
#include <string.h>
@ -752,8 +753,13 @@ plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (videocrop_debug, "videocrop", 0, "videocrop");
return gst_element_register (plugin, "videocrop", GST_RANK_NONE,
GST_TYPE_VIDEO_CROP);
if (gst_element_register (plugin, "videocrop", GST_RANK_NONE,
GST_TYPE_VIDEO_CROP)
&& gst_element_register (plugin, "aspectratiocrop", GST_RANK_NONE,
GST_TYPE_ASPECT_RATIO_CROP))
return TRUE;
return FALSE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,