gstpbutils

gstpbutils — General Application and Plugin Utility Library

Synopsis

#include <gst/pbutils/pbutils.h>

void                gst_pb_utils_init                   (void);

#define             GST_PLUGINS_BASE_VERSION_MAJOR
#define             GST_PLUGINS_BASE_VERSION_MINOR
#define             GST_PLUGINS_BASE_VERSION_MICRO
#define             GST_PLUGINS_BASE_VERSION_NANO
#define             GST_CHECK_PLUGINS_BASE_VERSION      (major,
                                                         minor,
                                                         micro)
void                gst_plugins_base_version            (guint *major,
                                                         guint *minor,
                                                         guint *micro,
                                                         guint *nano);
gchar *             gst_plugins_base_version_string     (void);

Description

Linking to this library

libgstpbutils is a general utility library for plugins and applications, available since gst-plugins-base 0.10.12. It currently provides the following:

  • human-readable description strings of codecs, elements, sources, decoders, encoders, or sinks from decoder/encoder caps, element names, or protocol names.

  • support for applications to initiate installation of missing plugins (if this is supported by the distribution or operating system used)

  • API for GStreamer elements to create missing-plugin messages in order to communicate to the application that a certain type of plugin is missing (decoder, encoder, URI protocol source, URI protocol sink, named element)

  • API for applications to recognise and handle missing-plugin messages

You should obtain the required CFLAGS and LIBS using pkg-config on the gstreamer-plugins-base-0.10 module. You will then also need to add '-lgstpbutils-0.10' manually to your LIBS line.

Before using any of its functions, applications and plugins must call gst_pb_utils_init() to initialise the library.

Details

gst_pb_utils_init ()

void                gst_pb_utils_init                   (void);

Initialises the base utils support library. This function is not thread-safe. Applications should call it after calling gst_init(), plugins should call it from their plugin_init function.

This function may be called multiple times. It will do nothing if the library has already been initialised.

Since 0.10.12


GST_PLUGINS_BASE_VERSION_MAJOR

#define GST_PLUGINS_BASE_VERSION_MAJOR (0)

The major version of GStreamer's gst-plugins-base libraries at compile time.

Since 0.10.31


GST_PLUGINS_BASE_VERSION_MINOR

#define GST_PLUGINS_BASE_VERSION_MINOR (10)

The minor version of GStreamer's gst-plugins-base libraries at compile time.

Since 0.10.31


GST_PLUGINS_BASE_VERSION_MICRO

#define GST_PLUGINS_BASE_VERSION_MICRO (34)

The micro version of GStreamer's gst-plugins-base libraries at compile time.

Since 0.10.31


GST_PLUGINS_BASE_VERSION_NANO

#define GST_PLUGINS_BASE_VERSION_NANO (0)

The nano version of GStreamer's gst-plugins-base libraries at compile time. Actual releases have 0, GIT versions have 1, prerelease versions have 2-...

Since 0.10.31


GST_CHECK_PLUGINS_BASE_VERSION()

#define             GST_CHECK_PLUGINS_BASE_VERSION(major,minor,micro)

gst_plugins_base_version ()

void                gst_plugins_base_version            (guint *major,
                                                         guint *minor,
                                                         guint *micro,
                                                         guint *nano);

Gets the version number of the GStreamer Plugins Base libraries.

major :

pointer to a guint to store the major version number, or NULL. [out]

minor :

pointer to a guint to store the minor version number, or NULL. [out]

micro :

pointer to a guint to store the micro version number, or NULL. [out]

nano :

pointer to a guint to store the nano version number, or NULL. [out]

Since 0.10.31


gst_plugins_base_version_string ()

gchar *             gst_plugins_base_version_string     (void);

This function returns a string that is useful for describing this version of GStreamer's gst-plugins-base libraries to the outside world: user agent strings, logging, about dialogs ...

Returns :

a newly allocated string describing this version of gst-plugins-base

Since 0.10.31