diff options
Diffstat (limited to 'gst/videocrop')
| -rw-r--r-- | gst/videocrop/Makefile.am | 28 | ||||
| -rw-r--r-- | gst/videocrop/Makefile.in | 833 | ||||
| -rw-r--r-- | gst/videocrop/gstaspectratiocrop.c | 453 | ||||
| -rw-r--r-- | gst/videocrop/gstaspectratiocrop.h | 67 | ||||
| -rw-r--r-- | gst/videocrop/gstvideocrop.c | 760 | ||||
| -rw-r--r-- | gst/videocrop/gstvideocrop.h | 92 |
6 files changed, 2233 insertions, 0 deletions
diff --git a/gst/videocrop/Makefile.am b/gst/videocrop/Makefile.am new file mode 100644 index 0000000..2b9838b --- /dev/null +++ b/gst/videocrop/Makefile.am @@ -0,0 +1,28 @@ +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 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 gstaspectratiocrop.h + +Android.mk: Makefile.am $(BUILT_SOURCES) + androgenizer \ + -:PROJECT libgstvideocrop -:SHARED libgstvideocrop \ + -:TAGS eng debug \ + -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \ + -:SOURCES $(libgstvideocrop_la_SOURCES) \ + $(nodist_libgstvideocrop_la_SOURCES) \ + -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstvideocrop_la_CFLAGS) \ + -:LDFLAGS $(libgstvideocrop_la_LDFLAGS) \ + $(libgstvideocrop_la_LIBADD) \ + -ldl \ + -:PASSTHROUGH LOCAL_ARM_MODE:=arm \ + LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \ + > $@ diff --git a/gst/videocrop/Makefile.in b/gst/videocrop/Makefile.in new file mode 100644 index 0000000..506a237 --- /dev/null +++ b/gst/videocrop/Makefile.in @@ -0,0 +1,833 @@ +# Makefile.in generated by automake 1.11.3 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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uninstall uninstall-am uninstall-pluginLTLIBRARIES + + +Android.mk: Makefile.am $(BUILT_SOURCES) + androgenizer \ + -:PROJECT libgstvideocrop -:SHARED libgstvideocrop \ + -:TAGS eng debug \ + -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \ + -:SOURCES $(libgstvideocrop_la_SOURCES) \ + $(nodist_libgstvideocrop_la_SOURCES) \ + -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstvideocrop_la_CFLAGS) \ + -:LDFLAGS $(libgstvideocrop_la_LDFLAGS) \ + $(libgstvideocrop_la_LIBADD) \ + -ldl \ + -:PASSTHROUGH LOCAL_ARM_MODE:=arm \ + LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \ + > $@ + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/gst/videocrop/gstaspectratiocrop.c b/gst/videocrop/gstaspectratiocrop.c new file mode 100644 index 0000000..150df37 --- /dev/null +++ b/gst/videocrop/gstaspectratiocrop.c @@ -0,0 +1,453 @@ +/* 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. + */ + +/** + * SECTION:element-aspectratiocrop + * @see_also: #GstVideoCrop + * + * This element crops video frames to a specified #GstAspectRatioCrop:aspect-ratio. + * + * If the aspect-ratio is already correct, the element will operate + * in pass-through mode. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v videotestsrc ! video/x-raw-rgb,height=640,width=480 ! aspectratiocrop aspect-ratio=16/9 ! ximagesink + * ]| This pipeline generates a videostream in 4/3 and crops it to 16/9. + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> +#include <gst/video/video.h> + +#include "gstaspectratiocrop.h" + +#include "gst/glib-compat-private.h" + +GST_DEBUG_CATEGORY_STATIC (aspect_ratio_crop_debug); +#define GST_CAT_DEFAULT aspect_ratio_crop_debug + +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 GstCaps *gst_aspect_ratio_crop_get_caps (GstPad * pad); +static gboolean gst_aspect_ratio_crop_set_caps (GstPad * pad, GstCaps * caps); +static void gst_aspect_ratio_crop_finalize (GObject * object); +static void gst_aspect_ratio_transform_structure (GstAspectRatioCrop * + aspect_ratio_crop, GstStructure * structure, GstStructure ** new_structure, + gboolean set_videocrop); + +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; + + aspect_ratio_crop = GST_ASPECT_RATIO_CROP (gst_pad_get_parent (pad)); + + g_mutex_lock (aspect_ratio_crop->crop_lock); + + structure = gst_caps_get_structure (caps, 0); + gst_aspect_ratio_transform_structure (aspect_ratio_crop, structure, NULL, + TRUE); + 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; +} + +static void +gst_aspect_ratio_crop_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details_simple (element_class, "aspectratiocrop", + "Filter/Effect/Video", + "Crops video into a user-defined aspect-ratio", + "Thijs Vermeir <thijsvermeir@gmail.com>"); + + gst_element_class_add_static_pad_template (element_class, &sink_template); + gst_element_class_add_static_pad_template (element_class, &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; + gobject_class->finalize = gst_aspect_ratio_crop_finalize; + + 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 | G_PARAM_STATIC_STRINGS)); +} + +static void +gst_aspect_ratio_crop_finalize (GObject * object) +{ + GstAspectRatioCrop *aspect_ratio_crop; + + aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object); + + if (aspect_ratio_crop->crop_lock) + g_mutex_free (aspect_ratio_crop->crop_lock); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gst_aspect_ratio_crop_init (GstAspectRatioCrop * aspect_ratio_crop, + GstAspectRatioCropClass * klass) +{ + GstPad *link_pad; + GstPad *src_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"); + src_pad = gst_ghost_pad_new ("src", link_pad); + gst_pad_set_getcaps_function (src_pad, + GST_DEBUG_FUNCPTR (gst_aspect_ratio_crop_get_caps)); + gst_element_add_pad (GST_ELEMENT (aspect_ratio_crop), src_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 ("sink", 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_transform_structure (GstAspectRatioCrop * aspect_ratio_crop, + GstStructure * structure, GstStructure ** new_structure, + gboolean set_videocrop) +{ + gdouble incoming_ar; + gdouble requested_ar; + gint width, height; + gint cropvalue; + gint par_d, par_n; + + /* 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"); + goto beach; + } + + /* get the information from the caps */ + if (!gst_structure_get_int (structure, "width", &width) || + !gst_structure_get_int (structure, "height", &height)) + goto beach; + + 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); + goto beach; + } 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; + if (set_videocrop) { + gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, cropvalue, 0, + cropvalue, 0); + } + if (new_structure) { + *new_structure = gst_structure_copy (structure); + gst_structure_set (*new_structure, + "height", G_TYPE_INT, (int) (height - (cropvalue * 2)), NULL); + } + } 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; + if (set_videocrop) { + gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, cropvalue, + 0, cropvalue); + } + if (new_structure) { + *new_structure = gst_structure_copy (structure); + gst_structure_set (*new_structure, + "width", G_TYPE_INT, (int) (width - (cropvalue * 2)), NULL); + } + } + + return; + +crop_failed: + GST_WARNING_OBJECT (aspect_ratio_crop, + "can't crop to aspect ratio requested"); + goto beach; +beach: + if (set_videocrop) { + gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, 0, 0, 0); + } + + if (new_structure) { + *new_structure = gst_structure_copy (structure); + } +} + +static GstCaps * +gst_aspect_ratio_crop_transform_caps (GstAspectRatioCrop * aspect_ratio_crop, + GstCaps * caps) +{ + GstCaps *transform; + gint size, i; + + transform = gst_caps_new_empty (); + + size = gst_caps_get_size (caps); + + for (i = 0; i < size; i++) { + GstStructure *s; + GstStructure *trans_s; + + s = gst_caps_get_structure (caps, i); + + gst_aspect_ratio_transform_structure (aspect_ratio_crop, s, &trans_s, + FALSE); + gst_caps_append_structure (transform, trans_s); + } + + return transform; +} + +static GstCaps * +gst_aspect_ratio_crop_get_caps (GstPad * pad) +{ + GstPad *peer; + GstAspectRatioCrop *aspect_ratio_crop; + GstCaps *return_caps; + + aspect_ratio_crop = GST_ASPECT_RATIO_CROP (gst_pad_get_parent (pad)); + + g_mutex_lock (aspect_ratio_crop->crop_lock); + + peer = gst_pad_get_peer (aspect_ratio_crop->sink); + if (peer == NULL) { + return_caps = gst_static_pad_template_get_caps (&src_template); + gst_caps_ref (return_caps); + } else { + GstCaps *peer_caps; + + peer_caps = gst_pad_get_caps (peer); + return_caps = + gst_aspect_ratio_crop_transform_caps (aspect_ratio_crop, peer_caps); + gst_caps_unref (peer_caps); + gst_object_unref (peer); + } + + g_mutex_unlock (aspect_ratio_crop->crop_lock); + gst_object_unref (aspect_ratio_crop); + + return return_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 = (GST_PAD_CAPS (aspect_ratio_crop->sink) != NULL); + } + 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); +} diff --git a/gst/videocrop/gstaspectratiocrop.h b/gst/videocrop/gstaspectratiocrop.h new file mode 100644 index 0000000..dc2e7cd --- /dev/null +++ b/gst/videocrop/gstaspectratiocrop.h @@ -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__ */ + diff --git a/gst/videocrop/gstvideocrop.c b/gst/videocrop/gstvideocrop.c new file mode 100644 index 0000000..04b6e61 --- /dev/null +++ b/gst/videocrop/gstvideocrop.c @@ -0,0 +1,760 @@ +/* GStreamer video frame cropping + * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net> + * + * 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. + */ + +/** + * SECTION:element-videocrop + * @see_also: #GstVideoBox + * + * This element crops video frames, meaning it can remove parts of the + * picture on the left, right, top or bottom of the picture and output + * a smaller picture than the input picture, with the unwanted parts at the + * border removed. + * + * The videocrop element is similar to the videobox element, but its main + * goal is to support a multitude of formats as efficiently as possible. + * Unlike videbox, it cannot add borders to the picture and unlike videbox + * it will always output images in exactly the same format as the input image. + * + * If there is nothing to crop, the element will operate in pass-through mode. + * + * Note that no special efforts are made to handle chroma-subsampled formats + * in the case of odd-valued cropping and compensate for sub-unit chroma plane + * shifts for such formats in the case where the #GstVideoCrop:left or + * #GstVideoCrop:top property is set to an odd number. This doesn't matter for + * most use cases, but it might matter for yours. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v videotestsrc ! videocrop top=42 left=1 right=4 bottom=0 ! ximagesink + * ]| + * </refsect2> + */ + +/* TODO: + * - for packed formats, we could avoid memcpy() in case crop_left + * and crop_right are 0 and just create a sub-buffer of the input + * buffer + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> +#include <gst/video/video.h> + +#include "gstvideocrop.h" +#include "gstaspectratiocrop.h" + +#include <string.h> + +GST_DEBUG_CATEGORY_STATIC (videocrop_debug); +#define GST_CAT_DEFAULT videocrop_debug + +enum +{ + ARG_0, + ARG_LEFT, + ARG_RIGHT, + ARG_TOP, + ARG_BOTTOM +}; + +/* the formats we support */ +#define GST_VIDEO_CAPS_GRAY "video/x-raw-gray, " \ + "bpp = (int) 8, " \ + "width = " GST_VIDEO_SIZE_RANGE ", " \ + "height = " GST_VIDEO_SIZE_RANGE ", " \ + "framerate = " GST_VIDEO_FPS_RANGE + +#define VIDEO_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 ";" \ + GST_VIDEO_CAPS_GRAY + +static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (VIDEO_CROP_CAPS) + ); + +static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (VIDEO_CROP_CAPS) + ); + +GST_BOILERPLATE (GstVideoCrop, gst_video_crop, GstBaseTransform, + GST_TYPE_BASE_TRANSFORM); + +static void gst_video_crop_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_video_crop_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static GstCaps *gst_video_crop_transform_caps (GstBaseTransform * trans, + GstPadDirection direction, GstCaps * caps); +static GstFlowReturn gst_video_crop_transform (GstBaseTransform * trans, + GstBuffer * inbuf, GstBuffer * outbuf); +static gboolean gst_video_crop_get_unit_size (GstBaseTransform * trans, + GstCaps * caps, guint * size); +static gboolean gst_video_crop_set_caps (GstBaseTransform * trans, + GstCaps * in_caps, GstCaps * outcaps); +static gboolean gst_video_crop_src_event (GstBaseTransform * trans, + GstEvent * event); + +static void +gst_video_crop_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details_simple (element_class, "Crop", + "Filter/Effect/Video", + "Crops video into a user-defined region", + "Tim-Philipp Müller <tim centricular net>"); + + gst_element_class_add_static_pad_template (element_class, + &sink_template); + gst_element_class_add_static_pad_template (element_class, &src_template); +} + +static gboolean +gst_video_crop_src_event (GstBaseTransform * trans, GstEvent * event) +{ + GstEvent *new_event; + GstStructure *new_structure; + const GstStructure *structure; + const gchar *event_name; + double pointer_x; + double pointer_y; + + GstVideoCrop *vcrop = GST_VIDEO_CROP (trans); + new_event = NULL; + + GST_OBJECT_LOCK (vcrop); + if (GST_EVENT_TYPE (event) == GST_EVENT_NAVIGATION && + (vcrop->crop_left != 0 || vcrop->crop_top != 0)) { + structure = gst_event_get_structure (event); + event_name = gst_structure_get_string (structure, "event"); + + if (event_name && + (strcmp (event_name, "mouse-move") == 0 || + strcmp (event_name, "mouse-button-press") == 0 || + strcmp (event_name, "mouse-button-release") == 0)) { + + if (gst_structure_get_double (structure, "pointer_x", &pointer_x) && + gst_structure_get_double (structure, "pointer_y", &pointer_y)) { + + new_structure = gst_structure_copy (structure); + gst_structure_set (new_structure, + "pointer_x", G_TYPE_DOUBLE, (double) (pointer_x + vcrop->crop_left), + "pointer_y", G_TYPE_DOUBLE, (double) (pointer_y + vcrop->crop_top), + NULL); + + new_event = gst_event_new_navigation (new_structure); + gst_event_unref (event); + } else { + GST_WARNING_OBJECT (vcrop, "Failed to read navigation event"); + } + } + } + + GST_OBJECT_UNLOCK (vcrop); + return GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, + (new_event ? new_event : event)); +} + +static void +gst_video_crop_class_init (GstVideoCropClass * klass) +{ + GObjectClass *gobject_class; + GstBaseTransformClass *basetransform_class; + + gobject_class = (GObjectClass *) klass; + basetransform_class = (GstBaseTransformClass *) klass; + + gobject_class->set_property = gst_video_crop_set_property; + gobject_class->get_property = gst_video_crop_get_property; + + g_object_class_install_property (gobject_class, ARG_LEFT, + g_param_spec_int ("left", "Left", "Pixels to crop at left", + 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + g_object_class_install_property (gobject_class, ARG_RIGHT, + g_param_spec_int ("right", "Right", "Pixels to crop at right", + 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + g_object_class_install_property (gobject_class, ARG_TOP, + g_param_spec_int ("top", "Top", "Pixels to crop at top", + 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + g_object_class_install_property (gobject_class, ARG_BOTTOM, + g_param_spec_int ("bottom", "Bottom", "Pixels to crop at bottom", + 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + + basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_video_crop_transform); + basetransform_class->transform_caps = + GST_DEBUG_FUNCPTR (gst_video_crop_transform_caps); + basetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_crop_set_caps); + basetransform_class->get_unit_size = + GST_DEBUG_FUNCPTR (gst_video_crop_get_unit_size); + + basetransform_class->passthrough_on_same_caps = FALSE; + basetransform_class->src_event = GST_DEBUG_FUNCPTR (gst_video_crop_src_event); +} + +static void +gst_video_crop_init (GstVideoCrop * vcrop, GstVideoCropClass * klass) +{ + vcrop->crop_right = 0; + vcrop->crop_left = 0; + vcrop->crop_top = 0; + vcrop->crop_bottom = 0; +} + +static gboolean +gst_video_crop_get_image_details_from_caps (GstVideoCrop * vcrop, + GstVideoCropImageDetails * details, GstCaps * caps) +{ + GstStructure *structure; + gint width, height; + + structure = gst_caps_get_structure (caps, 0); + if (!gst_structure_get_int (structure, "width", &width) || + !gst_structure_get_int (structure, "height", &height)) { + goto incomplete_format; + } + + details->width = width; + details->height = height; + + if (gst_structure_has_name (structure, "video/x-raw-rgb") || + gst_structure_has_name (structure, "video/x-raw-gray")) { + gint bpp = 0; + + if (!gst_structure_get_int (structure, "bpp", &bpp) || (bpp & 0x07) != 0) + goto incomplete_format; + + details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE; + details->bytes_per_pixel = bpp / 8; + details->stride = GST_ROUND_UP_4 (width * details->bytes_per_pixel); + details->size = details->stride * height; + } else if (gst_structure_has_name (structure, "video/x-raw-yuv")) { + guint32 format = 0; + + if (!gst_structure_get_fourcc (structure, "format", &format)) + goto incomplete_format; + + switch (format) { + case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'): + details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE; + details->bytes_per_pixel = 4; + details->stride = GST_ROUND_UP_4 (width * 4); + details->size = details->stride * height; + break; + case GST_MAKE_FOURCC ('Y', 'V', 'Y', 'U'): + case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'): + case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'): + details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX; + details->bytes_per_pixel = 2; + details->stride = GST_ROUND_UP_4 (width * 2); + details->size = details->stride * height; + if (format == GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y')) { + /* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5] */ + details->macro_y_off = 1; + } else { + /* YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */ + details->macro_y_off = 0; + } + break; + case GST_MAKE_FOURCC ('Y', '8', '0', '0'): + details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE; + details->bytes_per_pixel = 1; + details->stride = GST_ROUND_UP_4 (width); + details->size = details->stride * height; + break; + case GST_MAKE_FOURCC ('I', '4', '2', '0'): + case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):{ + details->packing = VIDEO_CROP_PIXEL_FORMAT_PLANAR; + + details->y_stride = GST_ROUND_UP_4 (width); + details->u_stride = GST_ROUND_UP_8 (width) / 2; + details->v_stride = GST_ROUND_UP_8 (width) / 2; + + /* I420 and YV12 have U/V planes swapped, but doesn't matter for us */ + details->y_off = 0; + details->u_off = 0 + details->y_stride * GST_ROUND_UP_2 (height); + details->v_off = details->u_off + + details->u_stride * (GST_ROUND_UP_2 (height) / 2); + details->size = details->v_off + + details->v_stride * (GST_ROUND_UP_2 (height) / 2); + break; + } + default: + goto unknown_format; + } + } else { + goto unknown_format; + } + + return TRUE; + + /* ERRORS */ +unknown_format: + { + GST_ELEMENT_ERROR (vcrop, STREAM, NOT_IMPLEMENTED, (NULL), + ("Unsupported format")); + return FALSE; + } + +incomplete_format: + { + GST_ELEMENT_ERROR (vcrop, CORE, NEGOTIATION, (NULL), + ("Incomplete caps, some required field is missing")); + return FALSE; + } +} + +static gboolean +gst_video_crop_get_unit_size (GstBaseTransform * trans, GstCaps * caps, + guint * size) +{ + GstVideoCropImageDetails img_details = { 0, }; + GstVideoCrop *vcrop = GST_VIDEO_CROP (trans); + + if (!gst_video_crop_get_image_details_from_caps (vcrop, &img_details, caps)) + return FALSE; + + *size = img_details.size; + return TRUE; +} + +#define ROUND_DOWN_2(n) ((n)&(~1)) + +static void +gst_video_crop_transform_packed_complex (GstVideoCrop * vcrop, + GstBuffer * inbuf, GstBuffer * outbuf) +{ + guint8 *in_data, *out_data; + guint i, dx; + + in_data = GST_BUFFER_DATA (inbuf); + out_data = GST_BUFFER_DATA (outbuf); + + in_data += vcrop->crop_top * vcrop->in.stride; + + /* rounding down here so we end up at the start of a macro-pixel and not + * in the middle of one */ + in_data += ROUND_DOWN_2 (vcrop->crop_left) * vcrop->in.bytes_per_pixel; + + dx = vcrop->out.width * vcrop->out.bytes_per_pixel; + + /* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5] + * YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */ + if ((vcrop->crop_left % 2) != 0) { + for (i = 0; i < vcrop->out.height; ++i) { + gint j; + + memcpy (out_data, in_data, dx); + + /* move just the Y samples one pixel to the left, don't worry about + * chroma shift */ + for (j = vcrop->in.macro_y_off; j < vcrop->out.stride - 2; j += 2) + out_data[j] = in_data[j + 2]; + + in_data += vcrop->in.stride; + out_data += vcrop->out.stride; + } + } else { + for (i = 0; i < vcrop->out.height; ++i) { + memcpy (out_data, in_data, dx); + in_data += vcrop->in.stride; + out_data += vcrop->out.stride; + } + } +} + +static void +gst_video_crop_transform_packed_simple (GstVideoCrop * vcrop, + GstBuffer * inbuf, GstBuffer * outbuf) +{ + guint8 *in_data, *out_data; + guint i, dx; + + in_data = GST_BUFFER_DATA (inbuf); + out_data = GST_BUFFER_DATA (outbuf); + + in_data += vcrop->crop_top * vcrop->in.stride; + in_data += vcrop->crop_left * vcrop->in.bytes_per_pixel; + + dx = vcrop->out.width * vcrop->out.bytes_per_pixel; + + for (i = 0; i < vcrop->out.height; ++i) { + memcpy (out_data, in_data, dx); + in_data += vcrop->in.stride; + out_data += vcrop->out.stride; + } +} + +static void +gst_video_crop_transform_planar (GstVideoCrop * vcrop, GstBuffer * inbuf, + GstBuffer * outbuf) +{ + guint8 *y_out, *u_out, *v_out; + guint8 *y_in, *u_in, *v_in; + guint i, dx; + + /* Y plane */ + y_in = GST_BUFFER_DATA (inbuf); + y_out = GST_BUFFER_DATA (outbuf); + + y_in += (vcrop->crop_top * vcrop->in.y_stride) + vcrop->crop_left; + dx = vcrop->out.width * 1; + + for (i = 0; i < vcrop->out.height; ++i) { + memcpy (y_out, y_in, dx); + y_in += vcrop->in.y_stride; + y_out += vcrop->out.y_stride; + } + + /* U + V planes */ + u_in = GST_BUFFER_DATA (inbuf) + vcrop->in.u_off; + u_out = GST_BUFFER_DATA (outbuf) + vcrop->out.u_off; + + u_in += (vcrop->crop_top / 2) * vcrop->in.u_stride; + u_in += vcrop->crop_left / 2; + + v_in = GST_BUFFER_DATA (inbuf) + vcrop->in.v_off; + v_out = GST_BUFFER_DATA (outbuf) + vcrop->out.v_off; + + v_in += (vcrop->crop_top / 2) * vcrop->in.v_stride; + v_in += vcrop->crop_left / 2; + + dx = GST_ROUND_UP_2 (vcrop->out.width) / 2; + + for (i = 0; i < GST_ROUND_UP_2 (vcrop->out.height) / 2; ++i) { + memcpy (u_out, u_in, dx); + memcpy (v_out, v_in, dx); + u_in += vcrop->in.u_stride; + u_out += vcrop->out.u_stride; + v_in += vcrop->in.v_stride; + v_out += vcrop->out.v_stride; + } +} + +static GstFlowReturn +gst_video_crop_transform (GstBaseTransform * trans, GstBuffer * inbuf, + GstBuffer * outbuf) +{ + GstVideoCrop *vcrop = GST_VIDEO_CROP (trans); + + switch (vcrop->in.packing) { + case VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE: + gst_video_crop_transform_packed_simple (vcrop, inbuf, outbuf); + break; + case VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX: + gst_video_crop_transform_packed_complex (vcrop, inbuf, outbuf); + break; + case VIDEO_CROP_PIXEL_FORMAT_PLANAR: + gst_video_crop_transform_planar (vcrop, inbuf, outbuf); + break; + default: + g_assert_not_reached (); + } + + return GST_FLOW_OK; +} + +static gint +gst_video_crop_transform_dimension (gint val, gint delta) +{ + gint64 new_val = (gint64) val + (gint64) delta; + + new_val = CLAMP (new_val, 1, G_MAXINT); + + return (gint) new_val; +} + +static gboolean +gst_video_crop_transform_dimension_value (const GValue * src_val, + gint delta, GValue * dest_val) +{ + gboolean ret = TRUE; + + g_value_init (dest_val, G_VALUE_TYPE (src_val)); + + if (G_VALUE_HOLDS_INT (src_val)) { + gint ival = g_value_get_int (src_val); + + ival = gst_video_crop_transform_dimension (ival, delta); + g_value_set_int (dest_val, ival); + } else if (GST_VALUE_HOLDS_INT_RANGE (src_val)) { + gint min = gst_value_get_int_range_min (src_val); + gint max = gst_value_get_int_range_max (src_val); + + min = gst_video_crop_transform_dimension (min, delta); + max = gst_video_crop_transform_dimension (max, delta); + gst_value_set_int_range (dest_val, min, max); + } else if (GST_VALUE_HOLDS_LIST (src_val)) { + gint i; + + for (i = 0; i < gst_value_list_get_size (src_val); ++i) { + const GValue *list_val; + GValue newval = { 0, }; + + list_val = gst_value_list_get_value (src_val, i); + if (gst_video_crop_transform_dimension_value (list_val, delta, &newval)) + gst_value_list_append_value (dest_val, &newval); + g_value_unset (&newval); + } + + if (gst_value_list_get_size (dest_val) == 0) { + g_value_unset (dest_val); + ret = FALSE; + } + } else { + g_value_unset (dest_val); + ret = FALSE; + } + + return ret; +} + +static GstCaps * +gst_video_crop_transform_caps (GstBaseTransform * trans, + GstPadDirection direction, GstCaps * caps) +{ + GstVideoCrop *vcrop; + GstCaps *other_caps; + gint dy, dx, i; + + vcrop = GST_VIDEO_CROP (trans); + + GST_OBJECT_LOCK (vcrop); + + GST_LOG_OBJECT (vcrop, "l=%d,r=%d,b=%d,t=%d", + vcrop->crop_left, vcrop->crop_right, vcrop->crop_bottom, vcrop->crop_top); + + if (direction == GST_PAD_SRC) { + dx = vcrop->crop_left + vcrop->crop_right; + dy = vcrop->crop_top + vcrop->crop_bottom; + } else { + dx = 0 - (vcrop->crop_left + vcrop->crop_right); + dy = 0 - (vcrop->crop_top + vcrop->crop_bottom); + } + GST_OBJECT_UNLOCK (vcrop); + + GST_LOG_OBJECT (vcrop, "transforming caps %" GST_PTR_FORMAT, caps); + + other_caps = gst_caps_new_empty (); + + for (i = 0; i < gst_caps_get_size (caps); ++i) { + const GValue *v; + GstStructure *structure, *new_structure; + GValue w_val = { 0, }, h_val = { + 0,}; + + structure = gst_caps_get_structure (caps, i); + + v = gst_structure_get_value (structure, "width"); + if (!gst_video_crop_transform_dimension_value (v, dx, &w_val)) { + GST_WARNING_OBJECT (vcrop, "could not tranform width value with dx=%d" + ", caps structure=%" GST_PTR_FORMAT, dx, structure); + continue; + } + + v = gst_structure_get_value (structure, "height"); + if (!gst_video_crop_transform_dimension_value (v, dy, &h_val)) { + g_value_unset (&w_val); + GST_WARNING_OBJECT (vcrop, "could not tranform height value with dy=%d" + ", caps structure=%" GST_PTR_FORMAT, dy, structure); + continue; + } + + new_structure = gst_structure_copy (structure); + gst_structure_set_value (new_structure, "width", &w_val); + gst_structure_set_value (new_structure, "height", &h_val); + g_value_unset (&w_val); + g_value_unset (&h_val); + GST_LOG_OBJECT (vcrop, "transformed structure %2d: %" GST_PTR_FORMAT + " => %" GST_PTR_FORMAT, i, structure, new_structure); + gst_caps_append_structure (other_caps, new_structure); + } + + if (gst_caps_is_empty (other_caps)) { + gst_caps_unref (other_caps); + other_caps = NULL; + } + + return other_caps; +} + +static gboolean +gst_video_crop_set_caps (GstBaseTransform * trans, GstCaps * incaps, + GstCaps * outcaps) +{ + GstVideoCrop *crop = GST_VIDEO_CROP (trans); + + if (!gst_video_crop_get_image_details_from_caps (crop, &crop->in, incaps)) + goto wrong_input; + + if (!gst_video_crop_get_image_details_from_caps (crop, &crop->out, outcaps)) + goto wrong_output; + + if (G_UNLIKELY ((crop->crop_left + crop->crop_right) >= crop->in.width || + (crop->crop_top + crop->crop_bottom) >= crop->in.height)) + goto cropping_too_much; + + GST_LOG_OBJECT (crop, "incaps = %" GST_PTR_FORMAT ", outcaps = %" + GST_PTR_FORMAT, incaps, outcaps); + + if ((crop->crop_left | crop->crop_right | crop->crop_top | crop-> + crop_bottom) == 0) { + GST_LOG_OBJECT (crop, "we are using passthrough"); + gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), TRUE); + } else { + GST_LOG_OBJECT (crop, "we are not using passthrough"); + gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), FALSE); + } + + return TRUE; + + /* ERROR */ +wrong_input: + { + GST_DEBUG_OBJECT (crop, "failed to parse input caps %" GST_PTR_FORMAT, + incaps); + return FALSE; + } +wrong_output: + { + GST_DEBUG_OBJECT (crop, "failed to parse output caps %" GST_PTR_FORMAT, + outcaps); + return FALSE; + } +cropping_too_much: + { + GST_DEBUG_OBJECT (crop, "we are cropping too much"); + return FALSE; + } +} + +static void +gst_video_crop_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstVideoCrop *video_crop; + + video_crop = GST_VIDEO_CROP (object); + + /* don't modify while we are transforming */ + GST_BASE_TRANSFORM_LOCK (GST_BASE_TRANSFORM_CAST (video_crop)); + + /* protect with the object lock so that we can read them */ + GST_OBJECT_LOCK (video_crop); + switch (prop_id) { + case ARG_LEFT: + video_crop->crop_left = g_value_get_int (value); + break; + case ARG_RIGHT: + video_crop->crop_right = g_value_get_int (value); + break; + case ARG_TOP: + video_crop->crop_top = g_value_get_int (value); + break; + case ARG_BOTTOM: + video_crop->crop_bottom = g_value_get_int (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } + GST_OBJECT_UNLOCK (video_crop); + + GST_LOG_OBJECT (video_crop, "l=%d,r=%d,b=%d,t=%d", + video_crop->crop_left, video_crop->crop_right, video_crop->crop_bottom, + video_crop->crop_top); + + gst_base_transform_reconfigure (GST_BASE_TRANSFORM (video_crop)); + GST_BASE_TRANSFORM_UNLOCK (GST_BASE_TRANSFORM_CAST (video_crop)); +} + +static void +gst_video_crop_get_property (GObject * object, guint prop_id, GValue * value, + GParamSpec * pspec) +{ + GstVideoCrop *video_crop; + + video_crop = GST_VIDEO_CROP (object); + + GST_OBJECT_LOCK (video_crop); + switch (prop_id) { + case ARG_LEFT: + g_value_set_int (value, video_crop->crop_left); + break; + case ARG_RIGHT: + g_value_set_int (value, video_crop->crop_right); + break; + case ARG_TOP: + g_value_set_int (value, video_crop->crop_top); + break; + case ARG_BOTTOM: + g_value_set_int (value, video_crop->crop_bottom); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } + GST_OBJECT_UNLOCK (video_crop); +} + +static gboolean +plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (videocrop_debug, "videocrop", 0, "videocrop"); + + 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, + GST_VERSION_MINOR, + "videocrop", + "Crops video into a user-defined region", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) diff --git a/gst/videocrop/gstvideocrop.h b/gst/videocrop/gstvideocrop.h new file mode 100644 index 0000000..477f21b --- /dev/null +++ b/gst/videocrop/gstvideocrop.h @@ -0,0 +1,92 @@ +/* GStreamer video frame cropping + * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net> + * + * 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_VIDEO_CROP_H__ +#define __GST_VIDEO_CROP_H__ + +#include <gst/base/gstbasetransform.h> + +G_BEGIN_DECLS + +#define GST_TYPE_VIDEO_CROP \ + (gst_video_crop_get_type()) +#define GST_VIDEO_CROP(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_CROP,GstVideoCrop)) +#define GST_VIDEO_CROP_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_CROP,GstVideoCropClass)) +#define GST_IS_VIDEO_CROP(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_CROP)) +#define GST_IS_VIDEO_CROP_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_CROP)) + +typedef enum { + VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE = 0, /* RGBx, AYUV */ + VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX, /* UYVY, YVYU */ + VIDEO_CROP_PIXEL_FORMAT_PLANAR /* I420, YV12 */ +} VideoCropPixelFormat; + +typedef struct _GstVideoCropImageDetails GstVideoCropImageDetails; +struct _GstVideoCropImageDetails +{ + /*< private >*/ + VideoCropPixelFormat packing; + + guint width; + guint height; + guint size; + + /* for packed RGB and YUV */ + guint stride; + guint bytes_per_pixel; + guint8 macro_y_off; /* for YUY2, YVYU, UYVY, Y offset within macropixel in bytes */ + + /* for planar YUV */ + guint y_stride, y_off; + guint u_stride, u_off; + guint v_stride, v_off; +}; + +typedef struct _GstVideoCrop GstVideoCrop; +typedef struct _GstVideoCropClass GstVideoCropClass; + +struct _GstVideoCrop +{ + GstBaseTransform basetransform; + + /*< private >*/ + gint crop_left; + gint crop_right; + gint crop_top; + gint crop_bottom; + + GstVideoCropImageDetails in; /* details of input image */ + GstVideoCropImageDetails out; /* details of output image */ +}; + +struct _GstVideoCropClass +{ + GstBaseTransformClass basetransform_class; +}; + +GType gst_video_crop_get_type (void); + +G_END_DECLS + +#endif /* __GST_VIDEO_CROP_H__ */ + |