From aa94247770732a40e46ab3d539dd9987062abef4 Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Fri, 10 Oct 2003 12:47:42 +0000 Subject: Some interface implementations for video4linux/video4linux2 plugins: a Tuner interface, with which one can select inp... Original commit message from CVS: Some interface implementations for video4linux/video4linux2 plugins: * a Tuner interface, with which one can select inputs and stations. Audio work is underway here, but unfinished. * A Xoverlay interface with which one can do simple overlay. Similar to the API of the v4l/Xv XFree86 extension. Widget implementation for GTK-2.0 coming up in the sandbox. * Colorbalance - for adapting colors (brightness, contrast, etc.) - pretty basic and maybe somewhat overdesigned. But it'll do for now. Apart from these interfaces, there's also a loadable library 'xwindowlistener' that listenes to X for the movement of a window and the overlap of other windows. This is partly copied from xawtv (and thus partly GPL :(), but it's needed for the xoverlay interface implementation in the v4l/v4l2 elements. Lastly, some small changes to remove redundant properties from the v4l/v4l2 elements since these can be done much simpler. Comments appreciated! --- gst-libs/gst/colorbalance/Makefile.am | 15 ++++ gst-libs/gst/colorbalance/colorbalance.c | 103 +++++++++++++++++++++++ gst-libs/gst/colorbalance/colorbalance.h | 73 +++++++++++++++++ gst-libs/gst/colorbalance/colorbalancechannel.c | 104 ++++++++++++++++++++++++ gst-libs/gst/colorbalance/colorbalancechannel.h | 62 ++++++++++++++ 5 files changed, 357 insertions(+) create mode 100644 gst-libs/gst/colorbalance/Makefile.am create mode 100644 gst-libs/gst/colorbalance/colorbalance.c create mode 100644 gst-libs/gst/colorbalance/colorbalance.h create mode 100644 gst-libs/gst/colorbalance/colorbalancechannel.c create mode 100644 gst-libs/gst/colorbalance/colorbalancechannel.h (limited to 'gst-libs/gst/colorbalance') diff --git a/gst-libs/gst/colorbalance/Makefile.am b/gst-libs/gst/colorbalance/Makefile.am new file mode 100644 index 00000000..cbd94c91 --- /dev/null +++ b/gst-libs/gst/colorbalance/Makefile.am @@ -0,0 +1,15 @@ +libgstinterfacesincludedir = \ + $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/colorbalance + +libgstinterfacesinclude_HEADERS = \ + colorbalance.h \ + colorbalancechannel.h + +lib_LTLIBRARIES = libgstcolorbalance.la + +libgstcolorbalance_la_SOURCES = \ + colorbalance.c \ + colorbalancechannel.c +libgstcolorbalance_la_LIBADD = +libgstcolorbalance_la_CFLAGS = $(GST_CFLAGS) $(GST_OPT_CFLAGS) +libgstcolorbalance_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) diff --git a/gst-libs/gst/colorbalance/colorbalance.c b/gst-libs/gst/colorbalance/colorbalance.c new file mode 100644 index 00000000..829cf5f6 --- /dev/null +++ b/gst-libs/gst/colorbalance/colorbalance.c @@ -0,0 +1,103 @@ +/* GStreamer Color Balance + * Copyright (C) 2003 Ronald Bultje + * + * colorbalance.c: image color balance interface design + * virtual class function wrappers + * + * 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 "colorbalance.h" + +static void gst_color_balance_class_init (GstColorBalanceClass *klass); + +GType +gst_color_balance_get_type (void) +{ + static GType gst_color_balance_type = 0; + + if (!gst_color_balance_type) { + static const GTypeInfo gst_color_balance_info = { + sizeof (GstColorBalanceClass), + (GBaseInitFunc) gst_color_balance_class_init, + NULL, + NULL, + NULL, + NULL, + 0, + 0, + NULL, + }; + + gst_color_balance_type = g_type_register_static (G_TYPE_INTERFACE, + "GstColorBalance", + &gst_color_balance_info, 0); + g_type_interface_add_prerequisite (gst_color_balance_type, + GST_TYPE_INTERFACE); + } + + return gst_color_balance_type; +} + +static void +gst_color_balance_class_init (GstColorBalanceClass *klass) +{ + /* default virtual functions */ + klass->list_channels = NULL; + klass->set_value = NULL; + klass->get_value = NULL; +} + +const GList * +gst_color_balance_list_channels (GstColorBalance *balance) +{ + GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance); + + if (klass->list_channels) { + return klass->list_channels (balance); + } + + return NULL; +} + +void +gst_color_balance_set_value (GstColorBalance *balance, + GstColorBalanceChannel *channel, + gint value) +{ + GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance); + + if (klass->set_value) { + klass->set_value (balance, channel, value); + } +} + +gint +gst_color_balance_get_value (GstColorBalance *balance, + GstColorBalanceChannel *channel) +{ + GstColorBalanceClass *klass = GST_COLOR_BALANCE_GET_CLASS (balance); + + if (klass->get_value) { + return klass->get_value (balance, channel); + } + + return channel->min_value; +} diff --git a/gst-libs/gst/colorbalance/colorbalance.h b/gst-libs/gst/colorbalance/colorbalance.h new file mode 100644 index 00000000..2b9d27d3 --- /dev/null +++ b/gst-libs/gst/colorbalance/colorbalance.h @@ -0,0 +1,73 @@ +/* GStreamer Color Balance + * Copyright (C) 2003 Ronald Bultje + * + * color-balance.h: image color balance interface design + * + * 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_COLOR_BALANCE_H__ +#define __GST_COLOR_BALANCE_H__ + +#include +#include + +G_BEGIN_DECLS + +#define GST_TYPE_COLOR_BALANCE \ + (gst_color_balance_get_type ()) +#define GST_COLOR_BALANCE(obj) \ + (GST_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_COLOR_BALANCE, \ + GstColorBalance)) +#define GST_COLOR_BALANCE_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_COLOR_BALANCE, \ + GstColorBalanceClass)) +#define GST_IS_COLOR_BALANCE(obj) \ + (GST_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_COLOR_BALANCE)) +#define GST_IS_COLOR_BALANCE_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_COLOR_BALANCE)) +#define GST_COLOR_BALANCE_GET_CLASS(inst) \ + (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_COLOR_BALANCE, GstColorBalanceClass)) + +typedef struct _GstColorBalance GstColorBalance; + +typedef struct _GstColorBalanceClass { + GTypeInterface klass; + + /* virtual functions */ + const GList * (* list_channels) (GstColorBalance *balance); + + void (* set_value) (GstColorBalance *balance, + GstColorBalanceChannel *channel, + gint value); + gint (* get_value) (GstColorBalance *balance, + GstColorBalanceChannel *channel); +} GstColorBalanceClass; + +GType gst_color_balance_get_type (void); + +/* virtual class function wrappers */ +const GList * + gst_color_balance_list_channels (GstColorBalance *balance); +void gst_color_balance_set_value (GstColorBalance *balance, + GstColorBalanceChannel *channel, + gint value); +gint gst_color_balance_get_value (GstColorBalance *balance, + GstColorBalanceChannel *channel); + +G_END_DECLS + +#endif /* __GST_COLOR_BALANCE_H__ */ diff --git a/gst-libs/gst/colorbalance/colorbalancechannel.c b/gst-libs/gst/colorbalance/colorbalancechannel.c new file mode 100644 index 00000000..8241bfe7 --- /dev/null +++ b/gst-libs/gst/colorbalance/colorbalancechannel.c @@ -0,0 +1,104 @@ +/* GStreamer Color Balance + * Copyright (C) 2003 Ronald Bultje + * + * colorbalancechannel.c: colorbalance channel object design + * + * 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 "colorbalancechannel.h" + +enum { + /* FILL ME */ + SIGNAL_VALUE_CHANGED, + LAST_SIGNAL +}; + +static void gst_color_balance_channel_class_init (GstColorBalanceChannelClass *klass); +static void gst_color_balance_channel_init (GstColorBalanceChannel *balance); +static void gst_color_balance_channel_dispose (GObject *object); + +static GObjectClass *parent_class = NULL; +static guint signals[LAST_SIGNAL] = { 0 }; + +GType +gst_color_balance_channel_get_type (void) +{ + static GType gst_color_balance_channel_type = 0; + + if (!gst_color_balance_channel_type) { + static const GTypeInfo color_balance_channel_info = { + sizeof (GstColorBalanceChannelClass), + NULL, + NULL, + (GClassInitFunc) gst_color_balance_channel_class_init, + NULL, + NULL, + sizeof (GstColorBalanceChannel), + 0, + (GInstanceInitFunc) gst_color_balance_channel_init, + NULL + }; + + gst_color_balance_channel_type = + g_type_register_static (G_TYPE_OBJECT, + "GstColorBalanceChannel", + &color_balance_channel_info, 0); + } + + return gst_color_balance_channel_type; +} + +static void +gst_color_balance_channel_class_init (GstColorBalanceChannelClass *klass) +{ + GObjectClass *object_klass = (GObjectClass *) klass; + + parent_class = g_type_class_ref (G_TYPE_OBJECT); + + signals[SIGNAL_VALUE_CHANGED] = + g_signal_new ("value_changed", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GstColorBalanceChannelClass, + value_changed), + NULL, NULL, g_cclosure_marshal_VOID__INT, + G_TYPE_NONE, 1, G_TYPE_INT); + + object_klass->dispose = gst_color_balance_channel_dispose; +} + +static void +gst_color_balance_channel_init (GstColorBalanceChannel *channel) +{ + channel->label = NULL; + channel->min_value = channel->max_value = 0; +} + +static void +gst_color_balance_channel_dispose (GObject *object) +{ + GstColorBalanceChannel *channel = GST_COLOR_BALANCE_CHANNEL (object); + + if (channel->label) + g_free (channel->label); + + if (parent_class->dispose) + parent_class->dispose (object); +} diff --git a/gst-libs/gst/colorbalance/colorbalancechannel.h b/gst-libs/gst/colorbalance/colorbalancechannel.h new file mode 100644 index 00000000..5f738ecb --- /dev/null +++ b/gst-libs/gst/colorbalance/colorbalancechannel.h @@ -0,0 +1,62 @@ +/* GStreamer Color Balance + * Copyright (C) 2003 Ronald Bultje + * + * colorbalancechannel.h: individual channel object + * + * 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_COLOR_BALANCE_CHANNEL_H__ +#define __GST_COLOR_BALANCE_CHANNEL_H__ + +#include + +G_BEGIN_DECLS + +#define GST_TYPE_COLOR_BALANCE_CHANNEL \ + (gst_color_balance_channel_get_type ()) +#define GST_COLOR_BALANCE_CHANNEL(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_COLOR_BALANCE_CHANNEL, \ + GstColorBalanceChannel)) +#define GST_COLOR_BALANCE_CHANNEL_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_COLOR_BALANCE_CHANNEL, \ + GstColorBalanceChannelClass)) +#define GST_IS_COLOR_BALANCE_CHANNEL(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_COLOR_BALANCE_CHANNEL)) +#define GST_IS_COLOR_BALANCE_CHANNEL_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_COLOR_BALANCE_CHANNEL)) + +typedef struct _GstColorBalanceChannel { + GObject parent; + + gchar *label; + gint min_value, + max_value; +} GstColorBalanceChannel; + +typedef struct _GstColorBalanceChannelClass { + GObjectClass parent; + + /* signals */ + void (* value_changed) (GstColorBalanceChannel *channel, + gint value); +} GstColorBalanceChannelClass; + +GType gst_color_balance_channel_get_type (void); + +G_END_DECLS + +#endif /* __GST_COLOR_BALANCE_CHANNEL_H__ */ -- cgit v1.2.1