From 6de50e694ba159b18070206eee1eb2f826ffd4e1 Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Thu, 26 Sep 2002 12:20:12 +0000 Subject: This adds a generic video functions library Original commit message from CVS: This adds a generic video functions library --- gst-libs/gst/Makefile.am | 4 +-- gst-libs/gst/video/Makefile.am | 12 ++++++++ gst-libs/gst/video/video.c | 64 ++++++++++++++++++++++++++++++++++++++++++ gst-libs/gst/video/video.h | 28 ++++++++++++++++++ 4 files changed, 106 insertions(+), 2 deletions(-) create mode 100644 gst-libs/gst/video/Makefile.am create mode 100644 gst-libs/gst/video/video.c create mode 100644 gst-libs/gst/video/video.h (limited to 'gst-libs') diff --git a/gst-libs/gst/Makefile.am b/gst-libs/gst/Makefile.am index d519764f..d6eaa874 100644 --- a/gst-libs/gst/Makefile.am +++ b/gst-libs/gst/Makefile.am @@ -4,6 +4,6 @@ else GCONF_DIR= endif -SUBDIRS = audio idct resample riff floatcast $(GCONF_DIR) +SUBDIRS = audio idct resample riff floatcast $(GCONF_DIR) video -DIST_SUBDIRS = audio idct resample riff floatcast gconf +DIST_SUBDIRS = audio idct resample riff floatcast gconf video diff --git a/gst-libs/gst/video/Makefile.am b/gst-libs/gst/video/Makefile.am new file mode 100644 index 00000000..ef924fd7 --- /dev/null +++ b/gst-libs/gst/video/Makefile.am @@ -0,0 +1,12 @@ +librarydir = $(libdir)/gst + +library_LTLIBRARIES = libgstvideo.la + +libgstvideo_la_SOURCES = video.c + +libgstvideoincludedir = $(includedir)/@PACKAGE@-@VERSION@/gst/video +libgstvideoinclude_HEADERS = video.h + +libgstvideo_la_LIBADD = +libgstvideo_la_CFLAGS = $(GST_CFLAGS) -finline-functions -ffast-math +libgstvideo_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) diff --git a/gst-libs/gst/video/video.c b/gst-libs/gst/video/video.c new file mode 100644 index 00000000..da9f06ab --- /dev/null +++ b/gst-libs/gst/video/video.c @@ -0,0 +1,64 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen + * Library <2002> Ronald Bultje + * + * 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. + */ + +#include "video.h" + +#define NUM_UNITS 1000000000 + +/* This is simply a convenience function, nothing more or less */ + +gdouble +gst_video_frame_rate (GstPad *pad) +{ + GstFormat dest_format = GST_FORMAT_UNITS; + gint64 dest_value = 0; + gdouble fps; + + /* do a convert request on the source pad */ + if (!gst_pad_convert(pad, + GST_FORMAT_TIME, GST_SECOND * NUM_UNITS, + &dest_format, &dest_value)) + { + g_warning("gstvideo: pad %s:%s failed to convert time to unit!\n", + GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad)); + return 0.; + } + + fps = ((gdouble) dest_value) / NUM_UNITS; + + GST_DEBUG(GST_CAT_ELEMENT_PADS, "Framerate request on pad %s:%s - %lf fps", + GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad), fps); + + return fps; +} + +static gboolean +plugin_init (GModule *module, GstPlugin *plugin) +{ + gst_plugin_set_longname (plugin, "Convenience routines for video plugins"); + return TRUE; +} + +GstPluginDesc plugin_desc = { + GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "gstvideo", + plugin_init +}; diff --git a/gst-libs/gst/video/video.h b/gst-libs/gst/video/video.h new file mode 100644 index 00000000..ef11872e --- /dev/null +++ b/gst-libs/gst/video/video.h @@ -0,0 +1,28 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen + * Library <2002> Ronald Bultje + * + * 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_CONVENIENCE_H__ +#define __GST_VIDEO_CONVENIENCE_H__ + +#include + +gdouble gst_video_frame_rate (GstPad *pad); + +#endif /* __GST_VIDEO_CONVENIENCE_H__ */ -- cgit v1.2.1