gstreamer/docs/manual/manual.xml

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9 KiB
XML

<?xml version='1.0'?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
<!ENTITY % image-entities SYSTEM "image.entities">
%image-entities;
<!ENTITY % version-entities SYSTEM "version.entities">
%version-entities;
<!ENTITY % url-entities SYSTEM "url.entities">
%url-entities;
<!ENTITY EXAFOOT "
<footnote>
<para>
The code for this example is automatically extracted from
the documentation and built under <filename>examples/manual</filename>
in the GStreamer tarball.
</para>
</footnote>
">
<!ENTITY TITLEPAGE SYSTEM "titlepage.xml">
<!-- Part 1: Overview -->
<!ENTITY INTRO SYSTEM "intro-preface.xml">
<!ENTITY GSTREAMER SYSTEM "intro-gstreamer.xml">
<!ENTITY MOTIVATION SYSTEM "intro-motivation.xml">
<!ENTITY CONCEPTS SYSTEM "intro-basics.xml">
<!-- Part 2: Basic Concepts -->
<!ENTITY INIT SYSTEM "basics-init.xml">
<!ENTITY ELEMENTS SYSTEM "basics-elements.xml">
<!ENTITY BINS SYSTEM "basics-bins.xml">
<!ENTITY BUS SYSTEM "basics-bus.xml">
<!ENTITY PADS SYSTEM "basics-pads.xml">
<!ENTITY DATA SYSTEM "basics-data.xml">
<!ENTITY HELLOWORLD SYSTEM "basics-helloworld.xml">
<!-- Part 3: Advanced Concepts -->
<!ENTITY QUERYEVENTS SYSTEM "advanced-position.xml">
<!ENTITY METADATA SYSTEM "advanced-metadata.xml">
<!ENTITY INTERFACES SYSTEM "advanced-interfaces.xml">
<!ENTITY CLOCKS SYSTEM "advanced-clocks.xml">
<!ENTITY DPARAMS SYSTEM "advanced-dparams.xml">
<!ENTITY THREADS SYSTEM "advanced-threads.xml">
<!ENTITY AUTOPLUGGING SYSTEM "advanced-autoplugging.xml">
<!ENTITY DATAACCESS SYSTEM "advanced-dataaccess.xml">
<!-- Part 4: Higher-level interfaces -->
<!ENTITY XML SYSTEM "highlevel-xml.xml">
<!ENTITY COMPONENTS SYSTEM "highlevel-components.xml">
<!-- Appendices -->
<!ENTITY CHECKLIST SYSTEM "appendix-checklist.xml">
<!ENTITY PORTING SYSTEM "appendix-porting.xml">
<!ENTITY INTEGRATION SYSTEM "appendix-integration.xml">
<!ENTITY LICENSING SYSTEM "appendix-licensing.xml">
<!ENTITY QUOTES SYSTEM "appendix-quotes.xml">
<!ENTITY GStreamer "<application>GStreamer</application>">
<!ENTITY GstPWG "<emphasis>GStreamer Plugin Writer's Guide</emphasis>">
]>
<book id="index">
&TITLEPAGE;
<!-- ############# Introduction ############### -->
<preface><title>Foreword</title>
<para><!-- synchronize with PWG -->
&GStreamer; is an extremely powerful and versatile framework for
creating streaming media applications. Many of the virtues of the
&GStreamer; framework come from its modularity: &GStreamer; can
seamlessly incorporate new plugin modules. But because modularity
and power often come at a cost of greater complexity, writing new
applications is not always easy.
</para>
<para>
This guide is intended to help you understand the &GStreamer;
framework (version &GST_VERSION;) so you can develop applications
based on it. The first chapters will focus on development of a
simple audio player, with much effort going into helping you
understand &GStreamer; concepts. Later chapters will go into
more advanced topics related to media playback, but also at
other forms of media processing (capture, editing, etc.).
</para>
</preface>
<preface><title>Introduction</title>
&INTRO;
</preface>
<!-- ############# Overview - part ############### -->
<part id="part-introduction">
<title>About GStreamer</title>
<partintro>
<para>
This part gives you an overview of the technologies described in
this book.
</para>
</partintro>
&GSTREAMER;
&MOTIVATION;
&CONCEPTS;
</part>
<!-- ############ Basic concepts - part ############# -->
<part id="part-building">
<title>Building an Application</title>
<partintro>
<para>
In these chapters, we will discuss the basic concepts of &GStreamer;
and the most-used objects, such as elements, pads and buffers. We
will use a visual representation of these objects so that we can
visualize the more complex pipelines you will learn to build later
on. You will get a first glance at the &GStreamer; API, which should
be enough for building elementary applications. Later on in this
part, you will also learn to build a basic command-line application.
</para>
<para>
Note that this part will give a look into the low-level API and
concepts of &GStreamer;. Once you're going to build applications,
you might want to use higher-level APIs. Those will be discussed
later on in this manual.
</para>
</partintro>
&INIT;
&ELEMENTS;
&BINS;
&BUS;
&PADS;
&DATA;
&HELLOWORLD;
</part>
<!-- ############ Advanced GStreamer - part ############# -->
<part id="part-advanced">
<title>Advanced &GStreamer; concepts</title>
<partintro>
<para>
In this part we will cover the more advanced features of &GStreamer;.
With the basics you learned in the previous part you should be
able to create a <emphasis>simple</emphasis> application. However,
&GStreamer; provides much more candy than just the basics of playing
back audio files. In this chapter, you will learn more of the
low-level features and internals of &GStreamer;.
</para>
<para>
Some parts of this part will serve mostly as an explanation of
how &GStreamer; works internally; they are not actually needed for
actual application development. This includes chapters such as the
ones covering scheduling, autoplugging and synchronization. Other
chapters, however, discuss more advanced ways of
pipeline-application interaction, and can turn out to be very useful
for certain applications. This includes the chapters on metadata,
querying and events, interfaces, dynamic parameters and pipeline
data manipulation.
</para>
</partintro>
&QUERYEVENTS;
&METADATA;
&INTERFACES;
&CLOCKS;
&DPARAMS;
&THREADS;
&AUTOPLUGGING;
&DATAACCESS;
</part>
<!-- ############ Higher-level APIs in GStreamer - part ############# -->
<part id="part-highlevel">
<title>Higher-level interfaces for &GStreamer; applications</title>
<partintro>
<para>
In the previous two parts, you have learned many of the internals
and their corresponding low-level interfaces into &GStreamer;
application programming. Many people will, however, not need so
much control (and as much code), but will prefer to use a standard
playback interface that does most of the difficult internals for
them. In this chapter, we will introduce you into the concept of
autopluggers, playback managing elements, XML-based pipelines and
other such things. Those higher-level interfaces are intended to
simplify &GStreamer;-based application programming. They do, however,
also reduce the flexibility. It is up to the application developer
to choose which interface he will want to use.
</para>
</partintro>
&COMPONENTS;
&XML;
</part>
<!-- ############ Appendices - part ############# -->
<part id="part-appendices">
<title>Appendices</title>
<partintro>
<para>
By now, you've learned all about the internals of &GStreamer; and
application programming using the &GStreamer; framework. This part
will go into some random bits that are useful to know if you're
going to use &GStreamer; for serious application programming. It
will touch upon things related to integration with popular desktop
environments that we run on (GNOME, KDE, OS X, Windows), it will
shortly explain how applications included with &GStreamer; can help
making your life easier, and some information on debugging.
</para>
<para>
In addition, we also provide a porting guide which will explain
easily how to port &GStreamer;-0.8 applications to &GStreamer;-0.10.
</para>
</partintro>
<!--
Idea:
* Debugging and error handling
- 'error' signal in pipelines
- checking return values and how to handle them
- using signals for pipeline states
- gst-debug
- programs
* Desktop integration
- Linux/UNIX
. {x,xv}imagesink
. {oss,alsa}sink
. {v4l,v4l2,oss,alsa}src
- GNOME
. GConf ({video,audio}{src,sink})
. gnomevfssrc, gnomevfssink
. popt
. app examples (RB, Totem, gnome-media, ...)
- KDE
. kiosrc
. app examples (JuK, AmaroK)
. ask Scott/Mark
- Mac OS X
. native video/audio sink
- Windows
. build etc.
* Quotes from devs
- table please...
-->
&CHECKLIST;
&PORTING;
&INTEGRATION;
&LICENSING;
&QUOTES;
</part>
</book>