mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-23 02:01:12 +00:00
Code Issues 1 Projects Releases Wiki Activity

fix manual id's

Browse source 
Original commit message from CVS:
fix manual id's
This commit is contained in:
Thomas Vander Stichele 2004-01-28 15:08:17 +00:00
parent 0d7d7838a3
commit e978887fca
60 changed files with 276 additions and 699 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
ChangeLog
View file

@ -1,3 +1,44 @@
2004-01-28 Thomas Vander Stichele <thomas at apestaart dot org>
* docs/manual/autoplugging.xml:
* docs/manual/bins-api.xml:
* docs/manual/bins.xml:
* docs/manual/buffers-api.xml:
* docs/manual/buffers.xml:
* docs/manual/clocks.xml:
* docs/manual/components.xml:
* docs/manual/cothreads.xml:
* docs/manual/debugging.xml:
* docs/manual/dparams-app.xml:
* docs/manual/dynamic.xml:
* docs/manual/elements-api.xml:
* docs/manual/elements.xml:
* docs/manual/factories.xml:
* docs/manual/gnome.xml:
* docs/manual/goals.xml:
* docs/manual/helloworld.xml:
* docs/manual/helloworld2.xml:
* docs/manual/init-api.xml:
* docs/manual/intro.xml:
* docs/manual/links-api.xml:
* docs/manual/links.xml:
* docs/manual/manual.xml:
* docs/manual/motivation.xml:
* docs/manual/pads-api.xml:
* docs/manual/pads.xml:
* docs/manual/plugins-api.xml:
* docs/manual/plugins.xml:
* docs/manual/programs.xml:
* docs/manual/queues.xml:
* docs/manual/quotes.xml:
* docs/manual/schedulers.xml:
* docs/manual/states-api.xml:
* docs/manual/states.xml:
* docs/manual/threads.xml:
* docs/manual/typedetection.xml:
* docs/manual/xml.xml:
use chapter, part, section or misc as id starts for all bits
2004-01-28 Thomas Vander Stichele <thomas at apestaart dot org> 2004-01-28 Thomas Vander Stichele <thomas at apestaart dot org>
* docs/gst/gstreamer-sections.txt: * docs/gst/gstreamer-sections.txt:

18
docs/manual/advanced-autoplugging.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-factories"> <chapter id="chapter-factories">
<title>More on factories</title> <title>More on factories</title>
<para> <para>
The small application we created in the previous chapter used the The small application we created in the previous chapter used the
@ -11,7 +11,7 @@
We will first explain the concepts involved before we move on We will first explain the concepts involved before we move on
to the reworked helloworld example using autoplugging. to the reworked helloworld example using autoplugging.
</para> </para>
<sect1> <sect1 id="section-factories-helloworld-problems">
<title>The problems with the helloworld example</title> <title>The problems with the helloworld example</title>
<para> <para>
If we take a look at how the elements were created in the previous If we take a look at how the elements were created in the previous
@ -40,7 +40,7 @@
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-mime">
<title>More on MIME Types</title> <title>More on MIME Types</title>
<para> <para>
GStreamer uses MIME types to identify the different types of data GStreamer uses MIME types to identify the different types of data
@ -82,10 +82,10 @@
</para> </para>
<para> <para>
<xref linkend="sec-mime-img"/> shows the MIME types associated with <xref linkend="section-mime-img"/> shows the MIME types associated with
each pad from the "hello world" example. each pad from the "hello world" example.
</para> </para>
<figure float="1" id="sec-mime-img"> <figure float="1" id="section-mime-img">
<title>The Hello world pipeline with MIME types</title> <title>The Hello world pipeline with MIME types</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -115,7 +115,7 @@
</sect1> </sect1>
<sect1> <sect1 id="section-factories-gstreamer-types">
<title>GStreamer types</title> <title>GStreamer types</title>
<para> <para>
GStreamer assigns a unique number to all registered MIME types. GStreamer assigns a unique number to all registered MIME types.
@ -204,12 +204,12 @@ struct _GstType {
This function will return 0 if the extension was not known. This function will return 0 if the extension was not known.
</para> </para>
<para> <para>
For more information, see <xref linkend="cha-autoplug"/>. For more information, see <xref linkend="chapter-autoplug"/>.
</para> </para>
</sect2> </sect2>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-create">
<title>Creating elements with the factory</title> <title>Creating elements with the factory</title>
<para> <para>
In the previous section we described how you could obtain In the previous section we described how you could obtain
@ -232,7 +232,7 @@ struct _GstType {
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-basic-types">
<title>GStreamer basic types</title> <title>GStreamer basic types</title>
<para> <para>
GStreamer only has two builtin types: GStreamer only has two builtin types:

5
docs/manual/advanced-clocks.xml
View file

@ -1,5 +0,0 @@
<chapter id="cha-clocks">
<title>Clocks in GStreamer</title>
<para>
</para>
</chapter>

10
docs/manual/advanced-dparams.xml
View file

@ -1,7 +1,7 @@
<chapter id="cha-dparams"> <chapter id="chapter-dparams">
<title>Dynamic Parameters</title> <title>Dynamic Parameters</title>
<sect1> <sect1 id="section-dparams-getting-started">
<title>Getting Started</title> <title>Getting Started</title>
<para> <para>
The Dynamic Parameters subsystem is contained within the The Dynamic Parameters subsystem is contained within the
@ -31,7 +31,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-creating">
<title>Creating and Attaching Dynamic Parameters</title> <title>Creating and Attaching Dynamic Parameters</title>
<para> <para>
Once you have created your elements you can create and attach dparams to them. Once you have created your elements you can create and attach dparams to them.
@ -81,7 +81,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-changing">
<title>Changing Dynamic Parameter Values</title> <title>Changing Dynamic Parameter Values</title>
<para> <para>
All interaction with dparams to actually set the dparam value is done through simple GObject properties. All interaction with dparams to actually set the dparam value is done through simple GObject properties.
@ -116,7 +116,7 @@
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-types">
<title>Different Types of Dynamic Parameter</title> <title>Different Types of Dynamic Parameter</title>
<para> <para>
There are currently only two implementations of dparams so far. They are both for real-time use so There are currently only two implementations of dparams so far. They are both for real-time use so

2
docs/manual/advanced-schedulers.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-scheduler"> <chapter id="chapter-scheduler">
<title>Understanding schedulers</title> <title>Understanding schedulers</title>
<para> <para>
The scheduler is responsible for managing the plugins at runtime. Its The scheduler is responsible for managing the plugins at runtime. Its

12
docs/manual/advanced-threads.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-threads"> <chapter id="chapter-threads">
<title>Threads</title> <title>Threads</title>
<para> <para>
GStreamer has support for multithreading through the use of GStreamer has support for multithreading through the use of
@ -37,7 +37,7 @@
itself. You never need to explicitly iterate a thread. itself. You never need to explicitly iterate a thread.
</para> </para>
<sect1> <sect1 id="section-threads-constraints">
<title>Constraints placed on the pipeline by the GstThread</title> <title>Constraints placed on the pipeline by the GstThread</title>
<para> <para>
Within the pipeline, everything is the same as in any other bin. The Within the pipeline, everything is the same as in any other bin. The
@ -46,13 +46,13 @@
fundamentally buffer-oriented rather than byte-oriented, the natural fundamentally buffer-oriented rather than byte-oriented, the natural
solution to this problem is an element that can "buffer" the buffers solution to this problem is an element that can "buffer" the buffers
between the threads, in a thread-safe fashion. This element is the between the threads, in a thread-safe fashion. This element is the
queue, described more fully in <xref linkend="cha-queues"/>. It doesn't queue, described more fully in <xref linkend="chapter-queues"/>. It doesn't
matter if the queue is placed in the containing bin or in the thread matter if the queue is placed in the containing bin or in the thread
itself, but it needs to be present on one side or the other to enable itself, but it needs to be present on one side or the other to enable
inter-thread communication. inter-thread communication.
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-threads-when">
<title>When would you want to use a thread?</title> <title>When would you want to use a thread?</title>
<para> <para>
If you are writing a GUI application, making the top-level bin a thread will make your GUI If you are writing a GUI application, making the top-level bin a thread will make your GUI
@ -63,9 +63,9 @@
an audio pipeline. an audio pipeline.
</para> </para>
<para> <para>
<xref linkend="sec-threads-img"/> shows how a thread can be visualised. <xref linkend="section-threads-img"/> shows how a thread can be visualised.
</para> </para>
<figure float="1" id="sec-threads-img"> <figure float="1" id="section-threads-img">
<title>A thread</title> <title>A thread</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

6
docs/manual/appendix-checklist.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-debugging"> <chapter id="chapter-debugging">
<title>Debugging</title> <title>Debugging</title>
<para> <para>
GStreamer has an extensive set of debugging tools for GStreamer has an extensive set of debugging tools for
plugin developers. plugin developers.
</para> </para>
<sect1> <sect1 id="section-debugging-command-line">
<title>Command line options</title> <title>Command line options</title>
<para> <para>
Applications using the GStreamer libraries accept the following set Applications using the GStreamer libraries accept the following set
@ -94,7 +94,7 @@ Mask (to be OR'ed) info/debug FLAGS
0x02000000 / REFCOUNTING 0x02000000 / REFCOUNTING
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-debugging-adding-handler">
<title>Adding a custom debug handler</title> <title>Adding a custom debug handler</title>
<para> <para>
</para> </para>

6
docs/manual/appendix-debugging.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-debugging"> <chapter id="chapter-debugging">
<title>Debugging</title> <title>Debugging</title>
<para> <para>
GStreamer has an extensive set of debugging tools for GStreamer has an extensive set of debugging tools for
plugin developers. plugin developers.
</para> </para>
<sect1> <sect1 id="section-debugging-command-line">
<title>Command line options</title> <title>Command line options</title>
<para> <para>
Applications using the GStreamer libraries accept the following set Applications using the GStreamer libraries accept the following set
@ -94,7 +94,7 @@ Mask (to be OR'ed) info/debug FLAGS
0x02000000 / REFCOUNTING 0x02000000 / REFCOUNTING
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-debugging-adding-handler">
<title>Adding a custom debug handler</title> <title>Adding a custom debug handler</title>
<para> <para>
</para> </para>

2
docs/manual/appendix-gnome.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-gnome"> <chapter id="chapter-gnome">
<title>GNOME integration</title> <title>GNOME integration</title>
<para> <para>
GStreamer is fairly easy to integrate with GNOME applications. GStreamer is fairly easy to integrate with GNOME applications.

2
docs/manual/appendix-integration.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-gnome"> <chapter id="chapter-gnome">
<title>GNOME integration</title> <title>GNOME integration</title>
<para> <para>
GStreamer is fairly easy to integrate with GNOME applications. GStreamer is fairly easy to integrate with GNOME applications.

8
docs/manual/appendix-programs.xml
View file

@ -1,9 +1,9 @@
<chapter id="cha-programs"> <chapter id="chapter-programs">
<title>Programs</title> <title>Programs</title>
<para> <para>
</para> </para>
<sect1> <sect1 id="section-programs-gst-register">
<title><command>gst-register</command></title> <title><command>gst-register</command></title>
<para> <para>
<command>gst-register</command> is used to rebuild the database of plugins. <command>gst-register</command> is used to rebuild the database of plugins.
@ -12,7 +12,7 @@
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-programs-gst-launch">
<title><command>gst-launch</command></title> <title><command>gst-launch</command></title>
<para> <para>
This is a tool that will construct pipelines based on a command-line This is a tool that will construct pipelines based on a command-line
@ -149,7 +149,7 @@ main (int argc, char *argv[])
</sect2> </sect2>
</sect1> </sect1>
<sect1> <sect1 id="section-programs-gst-inspect">
<title><command>gst-inspect</command></title> <title><command>gst-inspect</command></title>
<para> <para>
This is a tool to query a plugin or an element about its properties. This is a tool to query a plugin or an element about its properties.

2
docs/manual/appendix-quotes.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-quotes"> <chapter id="chapter-quotes">
<title>Quotes from the Developers</title> <title>Quotes from the Developers</title>
<para> <para>
As well as being a cool piece of software, As well as being a cool piece of software,

8
docs/manual/autoplugging.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-autoplug"> <chapter id="chapter-autoplug">
<title>Autoplugging</title> <title>Autoplugging</title>
<para> <para>
<application>GStreamer</application> provides an API to automatically <application>GStreamer</application> provides an API to automatically
@ -91,12 +91,12 @@
</programlisting> </programlisting>
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-autoplug-cache">
<title>Using the <classname>GstAutoplugCache</classname> element</title> <title>Using the <classname>GstAutoplugCache</classname> element</title>
<para> <para>
The <classname>GstAutoplugCache</classname> element is used to cache the The <classname>GstAutoplugCache</classname> element is used to cache the
media stream when performing typedetection. As we have seen in media stream when performing typedetection. As we have seen in
<xref linkend="cha-typedetection"/>, the typefind function consumes a <xref linkend="chapter-typedetection"/>, the typefind function consumes a
buffer to determine its media type. After we have set up the pipeline buffer to determine its media type. After we have set up the pipeline
to play the media stream we should be able to 'replay' the previous buffer(s). to play the media stream we should be able to 'replay' the previous buffer(s).
This is what the autoplugcache is used for. This is what the autoplugcache is used for.
@ -147,7 +147,7 @@
autoplugger, the autoplugcache and the typefind element. autoplugger, the autoplugcache and the typefind element.
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-autoplugging-spider">
<title>Another approach to autoplugging</title> <title>Another approach to autoplugging</title>
<para> <para>
The autoplug API is interesting, but often impractical. It is static; The autoplug API is interesting, but often impractical. It is static;

49
docs/manual/basics-bins.xml
View file

@ -1,49 +0,0 @@
<chapter id="cha-bins">
<title>Bins</title>
<para>
A bin is a container element. You can add elements to a bin. Since a bin is
an element itself, it can also be added to another bin.
</para>
<para>
Bins allow you to combine a group of linked elements into one logical element. You do
not deal with the individual elements anymore but with just one element, the bin.
We will see that this is extremely powerful when you are going to construct
complex pipelines since it allows you to break up the pipeline in smaller chunks.
</para>
<para>
The bin will also manage the elements contained in it. It will figure out how
the data will flow in the bin and generate an optimal plan for that data flow. Plan
generation is one of the most complicated procedures in GStreamer.
</para>
<figure float="1" id="sec-bin-img">
<title>Visualisation of a bin with some elements in it</title>
<mediaobject>
<imageobject>
<imagedata fileref="images/bin-element.&image;" format="&IMAGE;" />
</imageobject>
</mediaobject>
</figure>
<para>
There are two specialized bins available to the GStreamer programmer:
<itemizedlist>
<listitem>
<para>
a pipeline: a generic container that allows scheduling of the
containing elements. The toplevel bin has to be a pipeline.
Every application thus needs at least one of these.
</para>
</listitem>
<listitem>
<para>
a thread: a bin that will be run in a separate execution thread.
You will have to use this bin if you have to carefully
synchronize audio and video, or for buffering. You will learn
more about threads in <xref linkend="cha-threads"/>.
</para>
</listitem>
</itemizedlist>
</para>
</chapter>

2
docs/manual/basics-data.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-buffers"> <chapter id="chapter-buffers">
<title>Buffers</title> <title>Buffers</title>
<para> <para>
Buffers contain the data that will flow through the pipeline you have Buffers contain the data that will flow through the pipeline you have

30
docs/manual/basics-elements.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-elements"> <chapter id="chapter-elements">
<title>Elements</title> <title>Elements</title>
<para> <para>
The most important object in <application>GStreamer</application> for the The most important object in <application>GStreamer</application> for the
application programmer is the <classname>GstElement</classname> object. application programmer is the <classname>GstElement</classname> object.
</para> </para>
<sect1 id="sec-elements-design"> <sect1 id="section-elements-design">
<title>What is an element ?</title> <title>What is an element ?</title>
<para> <para>
An element is the basic building block for the media pipeline. An element is the basic building block for the media pipeline.
@ -16,26 +16,26 @@
<para> <para>
Elements, from the perspective of GStreamer, are viewed as "black boxes" Elements, from the perspective of GStreamer, are viewed as "black boxes"
with a number of different aspects. One of these aspects is the presence with a number of different aspects. One of these aspects is the presence
of "pads" (see <xref linkend="cha-pads"/>), or link points. This terminology arises from soldering; of "pads" (see <xref linkend="chapter-pads"/>), or link points. This terminology arises from soldering;
pads are where wires can be attached. pads are where wires can be attached.
</para> </para>
</sect1> </sect1>
<sect1 id="sec-elements-types"> <sect1 id="section-elements-types">
<title>Types of elements</title> <title>Types of elements</title>
<sect2 id="sec-elements-src"> <sect2 id="section-elements-src">
<title>Source elements</title> <title>Source elements</title>
<para> <para>
Source elements generate data for use by a pipeline, for example Source elements generate data for use by a pipeline, for example
reading from disk or from a sound card. reading from disk or from a sound card.
</para> </para>
<para> <para>
<xref linkend="sec-element-srcimg"/> shows how we will visualise <xref linkend="section-element-srcimg"/> shows how we will visualise
a source element. a source element.
We always draw a source pad to the right of the element. We always draw a source pad to the right of the element.
</para> </para>
<figure float="1" id="sec-element-srcimg"> <figure float="1" id="section-element-srcimg">
<title>Visualisation of a source element</title> <title>Visualisation of a source element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -50,7 +50,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-filter"> <sect2 id="section-elements-filter">
<title>Filters and codecs</title> <title>Filters and codecs</title>
<para> <para>
Filter elements have both input and output pads. They operate on Filter elements have both input and output pads. They operate on
@ -63,7 +63,7 @@
for example, a video mixer might have two input pads (the images of for example, a video mixer might have two input pads (the images of
the two different video streams) and one output pad. the two different video streams) and one output pad.
</para> </para>
<figure float="1" id="sec-element-filterimg"> <figure float="1" id="section-element-filterimg">
<title>Visualisation of a filter element</title> <title>Visualisation of a filter element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -72,12 +72,12 @@
</mediaobject> </mediaobject>
</figure> </figure>
<para> <para>
<xref linkend="sec-element-filterimg"/> shows how we will visualise <xref linkend="section-element-filterimg"/> shows how we will visualise
a filter element. a filter element.
This element has one sink (input) pad and one source (output) pad. This element has one sink (input) pad and one source (output) pad.
Sink pads are drawn on the left of the element. Sink pads are drawn on the left of the element.
</para> </para>
<figure float="1" id="sec-element-multifilterimg"> <figure float="1" id="section-element-multifilterimg">
<title>Visualisation of a filter element with <title>Visualisation of a filter element with
more than one output pad</title> more than one output pad</title>
<mediaobject> <mediaobject>
@ -88,7 +88,7 @@
</mediaobject> </mediaobject>
</figure> </figure>
<para> <para>
<xref linkend="sec-element-filterimg"/> shows the visualisation of a filter element with <xref linkend="section-element-filterimg"/> shows the visualisation of a filter element with
more than one output pad. An example of such a filter is the AVI more than one output pad. An example of such a filter is the AVI
demultiplexer. This element will parse the input data and demultiplexer. This element will parse the input data and
extract the audio and video data. Most of these filters dynamically extract the audio and video data. Most of these filters dynamically
@ -97,15 +97,15 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-sink"> <sect2 id="section-elements-sink">
<title>Sink elements</title> <title>Sink elements</title>
<para> <para>
Sink elements are end points in a media pipeline. They accept Sink elements are end points in a media pipeline. They accept
data but do not produce anything. Disk writing, soundcard playback, data but do not produce anything. Disk writing, soundcard playback,
and video output would all be implemented by sink elements. and video output would all be implemented by sink elements.
<xref linkend="sec-element-sinkimg"/> shows a sink element. <xref linkend="section-element-sinkimg"/> shows a sink element.
</para> </para>
<figure float="1" id="sec-element-sinkimg"> <figure float="1" id="section-element-sinkimg">
<title>Visualisation of a sink element</title> <title>Visualisation of a sink element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

10
docs/manual/basics-helloworld.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-hello"> <chapter id="chapter-hello-world">
<title>Your first application</title> <title>Your first application</title>
<para> <para>
This chapter describes the most rudimentary aspects of a This chapter describes the most rudimentary aspects of a
@ -7,7 +7,7 @@
pausing and stopping the pipeline. pausing and stopping the pipeline.
</para> </para>
<sect1> <sect1 id="section-hello-world">
<title>Hello world</title> <title>Hello world</title>
<para> <para>
We will create a simple first application, a complete MP3 player, using We will create a simple first application, a complete MP3 player, using
@ -177,7 +177,7 @@ main (int argc, char *argv[])
We now have a created a complete pipeline. We can visualise the We now have a created a complete pipeline. We can visualise the
pipeline as follows: pipeline as follows:
</para> </para>
<figure float="1" id="sec-hello-img"> <figure float="1" id="section-hello-img">
<title>The "hello world" pipeline</title> <title>The "hello world" pipeline</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -232,7 +232,7 @@ main (int argc, char *argv[])
</sect1> </sect1>
<sect1> <sect1 id="section-hello-world-compile">
<title>Compiling helloworld.c</title> <title>Compiling helloworld.c</title>
<para> <para>
To compile the helloworld example, use: To compile the helloworld example, use:
@ -256,7 +256,7 @@ main (int argc, char *argv[])
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-hello-world-conclusion">
<title>Conclusion</title> <title>Conclusion</title>
<para> <para>
This concludes our first example. As you see, setting up a pipeline This concludes our first example. As you see, setting up a pipeline

2
docs/manual/basics-init.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-initialisation"> <chapter id="chapter-initialisation">
<title>Initializing <application>GStreamer</application></title> <title>Initializing <application>GStreamer</application></title>
<para> <para>
When writing a <application>GStreamer</application> application, you can When writing a <application>GStreamer</application> application, you can

20
docs/manual/basics-pads.xml
View file

@ -1,13 +1,13 @@
<chapter id="cha-pads"> <chapter id="chapter-pads">
<title>Pads</title> <title>Pads</title>
<para> <para>
As we have seen in <xref linkend="cha-elements"/>, the pads are the element's As we have seen in <xref linkend="chapter-elements"/>, the pads are the element's
interface to the outside world. interface to the outside world.
</para> </para>
<para> <para>
The specific type of media that the element can handle will be exposed by the pads. The specific type of media that the element can handle will be exposed by the pads.
The description of this media type is done with capabilities(see The description of this media type is done with capabilities(see
<xref linkend="sec-caps"/>) <xref linkend="section-caps"/>)
</para> </para>
<para> <para>
@ -24,10 +24,10 @@
</para></footnote> </para></footnote>
</para> </para>
<sect1 id="sec-pads-type"> <sect1 id="section-pads-type">
<title>Types of pads</title> <title>Types of pads</title>
<sect2 id="sec-pads-dynamic"> <sect2 id="section-pads-dynamic">
<title>Dynamic pads</title> <title>Dynamic pads</title>
<para> <para>
Some elements might not have all of their pads when the element is Some elements might not have all of their pads when the element is
@ -47,7 +47,7 @@
pipelines later on in this manual. pipelines later on in this manual.
</para> </para>
</sect2> </sect2>
<sect2 id="sec-pads-request"> <sect2 id="section-pads-request">
<title>Request pads</title> <title>Request pads</title>
<para> <para>
An element can also have request pads. These pads are not created An element can also have request pads. These pads are not created
@ -63,7 +63,7 @@
</sect1> </sect1>
<sect1 id="sec-caps"> <sect1 id="section-caps">
<title>Capabilities of a pad</title> <title>Capabilities of a pad</title>
<para> <para>
Since the pads play a very important role in how the element is viewed by the Since the pads play a very important role in how the element is viewed by the
@ -76,7 +76,7 @@
Plugin Writer's Guide. Plugin Writer's Guide.
</para> </para>
<sect2 id="sec-pads-caps"> <sect2 id="section-pads-caps">
<title>Capabilities</title> <title>Capabilities</title>
<para> <para>
Capabilities are attached to a pad in order to describe Capabilities are attached to a pad in order to describe
@ -137,7 +137,7 @@ Pads:
rate: Integer range: 11025 - 48000 rate: Integer range: 11025 - 48000
</programlisting> </programlisting>
</sect2> </sect2>
<sect2 id="sec-pads-props"> <sect2 id="section-pads-props">
<title>What are properties ?</title> <title>What are properties ?</title>
<para> <para>
Properties are used to describe extra information for Properties are used to describe extra information for
@ -217,7 +217,7 @@ Pads:
</itemizedlist> </itemizedlist>
</sect2> </sect2>
<sect2 id="sec-pads-caps-use"> <sect2 id="section-pads-caps-use">
<title>What capabilities are used for</title> <title>What capabilities are used for</title>
<para> <para>
Capabilities describe in great detail the type of media that is handled by the pads. Capabilities describe in great detail the type of media that is handled by the pads.

31
docs/manual/basics-plugins.xml
View file

@ -1,31 +0,0 @@
<chapter id="cha-plugins">
<title>Plugins</title>
<!-- FIXME: introduce type definitions before this chapter -->
<para>
A plugin is a shared library that contains at least one of the following
items:
</para>
<itemizedlist>
<listitem>
<para>
one or more element factories
</para>
</listitem>
<listitem>
<para>
one or more type definitions
</para>
</listitem>
<listitem>
<para>
one or more auto-pluggers
</para>
</listitem>
<listitem>
<para>
exported symbols for use in other plugins
</para>
</listitem>
</itemizedlist>
</chapter>

20
docs/manual/bins-api.xml
View file

@ -1,6 +1,6 @@
<chapter id="cha-bins-api"> <chapter id="chapter-bins-api">
<title>Bins</title> <title>Bins</title>
<sect1 id="sec-bin-create"> <sect1 id="section-bin-create">
<title>Creating a bin</title> <title>Creating a bin</title>
<para> <para>
Bins are created in the same way that other elements are created. ie. Bins are created in the same way that other elements are created. ie.
@ -22,7 +22,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1 id="sec-bin-adding"> <sect1 id="section-bin-adding">
<title>Adding elements to a bin</title> <title>Adding elements to a bin</title>
<para> <para>
Elements are added to a bin with the following code sample: Elements are added to a bin with the following code sample:
@ -95,7 +95,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1 id="sec-bin-custom"> <sect1 id="section-bin-custom">
<title>Custom bins</title> <title>Custom bins</title>
<para> <para>
The application programmer can create custom bins packed with elements The application programmer can create custom bins packed with elements
@ -121,7 +121,7 @@
Note that the above code assumes that the mp3player bin derives itself Note that the above code assumes that the mp3player bin derives itself
from a <classname>GstThread</classname>, which begins to play as soon from a <classname>GstThread</classname>, which begins to play as soon
as its state is set to PLAYING. Other bin types may need explicit as its state is set to PLAYING. Other bin types may need explicit
iteration. For more information, see <xref linkend="cha-threads"/>. iteration. For more information, see <xref linkend="chapter-threads"/>.
</para> </para>
<para> <para>
Custom bins can be created with a plugin or an XML description. You Custom bins can be created with a plugin or an XML description. You
@ -130,13 +130,13 @@
</para> </para>
</sect1> </sect1>
<sect1 id="sec-bin-ghostpads"> <sect1 id="section-bin-ghostpads">
<title>Ghost pads</title> <title>Ghost pads</title>
<para> <para>
You can see from <xref linkend="sec-bin-noghost-img"/> how a bin has no pads of its own. You can see from <xref linkend="section-bin-noghost-img"/> how a bin has no pads of its own.
This is where "ghost pads" come into play. This is where "ghost pads" come into play.
</para> </para>
<figure float="1" id="sec-bin-noghost-img"> <figure float="1" id="section-bin-noghost-img">
<title>Visualisation of a <classname>GstBin</classname> element without ghost pads</title> <title>Visualisation of a <classname>GstBin</classname> element without ghost pads</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -151,7 +151,7 @@
for creating custom bins. for creating custom bins.
</para> </para>
<figure float="1" id="sec-bin-ghost-img"> <figure float="1" id="section-bin-ghost-img">
<title>Visualisation of a <classname>GstBin</classname> element with a ghost pad</title> <title>Visualisation of a <classname>GstBin</classname> element with a ghost pad</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -160,7 +160,7 @@
</mediaobject> </mediaobject>
</figure> </figure>
<para> <para>
<xref linkend="sec-bin-ghost-img"/> <xref linkend="section-bin-ghost-img"/>
is a representation of a ghost pad. The sink pad of element one is now also a pad is a representation of a ghost pad. The sink pad of element one is now also a pad
of the bin. of the bin.
</para> </para>

6
docs/manual/bins.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-bins"> <chapter id="chapter-bins">
<title>Bins</title> <title>Bins</title>
<para> <para>
A bin is a container element. You can add elements to a bin. Since a bin is A bin is a container element. You can add elements to a bin. Since a bin is
@ -16,7 +16,7 @@
generation is one of the most complicated procedures in GStreamer. generation is one of the most complicated procedures in GStreamer.
</para> </para>
<figure float="1" id="sec-bin-img"> <figure float="1" id="section-bin-img">
<title>Visualisation of a bin with some elements in it</title> <title>Visualisation of a bin with some elements in it</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -41,7 +41,7 @@
a thread: a bin that will be run in a separate execution thread. a thread: a bin that will be run in a separate execution thread.
You will have to use this bin if you have to carefully You will have to use this bin if you have to carefully
synchronize audio and video, or for buffering. You will learn synchronize audio and video, or for buffering. You will learn
more about threads in <xref linkend="cha-threads"/>. more about threads in <xref linkend="chapter-threads"/>.
</para> </para>
</listitem> </listitem>
</itemizedlist> </itemizedlist>

2
docs/manual/buffers-api.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-buffers-api"> <chapter id="chapter-buffers-api">
<title>Buffers</title> <title>Buffers</title>
<para> <para>
</para> </para>

2
docs/manual/buffers.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-buffers"> <chapter id="chapter-buffers">
<title>Buffers</title> <title>Buffers</title>
<para> <para>
Buffers contain the data that will flow through the pipeline you have Buffers contain the data that will flow through the pipeline you have

2
docs/manual/clocks.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-clocks"> <chapter id="chapter-clocks">
<title>Clocks in GStreamer</title> <title>Clocks in GStreamer</title>
<para> <para>
</para> </para>

10
docs/manual/components.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-components"> <chapter id="chapter-components">
<title>Components</title> <title>Components</title>
<para> <para>
@ -10,7 +10,7 @@
in their programs. in their programs.
</para> </para>
<sect1> <sect1 id="section-components-gst-play">
<title>GstPlay</title> <title>GstPlay</title>
<para> <para>
GstPlay is a GtkWidget with a simple API to play, pause and stop a media file. GstPlay is a GtkWidget with a simple API to play, pause and stop a media file.
@ -18,15 +18,15 @@
</sect1> </sect1>
<sect1> <sect1 id="section-components-gst-media-play">
<title>GstMediaPlay</title> <title>GstMediaPlay</title>
<para> <para>
GstMediaply is a complete player widget. GstMediaPlay is a complete player widget.
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-components-gst-editor">
<title>GstEditor</title> <title>GstEditor</title>
<para> <para>
GstEditor is a set of widgets to display a graphical representation of a GstEditor is a set of widgets to display a graphical representation of a

6
docs/manual/cothreads.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-cothreads"> <chapter id="chapter-cothreads">
<title>Cothreads</title> <title>Cothreads</title>
<para> <para>
Cothreads are user-space threads that greatly reduce context switching overhead introduced by Cothreads are user-space threads that greatly reduce context switching overhead introduced by
@ -34,7 +34,7 @@
explain the chain-based elements. explain the chain-based elements.
</para> </para>
<sect1 id="sec-chain-based"> <sect1 id="section-chain-based">
<title>Chain-based elements</title> <title>Chain-based elements</title>
<para> <para>
Chain based elements receive a buffer of data and are supposed Chain based elements receive a buffer of data and are supposed
@ -69,7 +69,7 @@ chain_function (GstPad *pad, GstBuffer *buffer)
</sect1> </sect1>
<sect1 id="sec-loop-based"> <sect1 id="section-loop-based">
<title>Loop-based elements</title> <title>Loop-based elements</title>
<para> <para>
As opposed to chain-based elements, loop-based elements enter an As opposed to chain-based elements, loop-based elements enter an

6
docs/manual/debugging.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-debugging"> <chapter id="chapter-debugging">
<title>Debugging</title> <title>Debugging</title>
<para> <para>
GStreamer has an extensive set of debugging tools for GStreamer has an extensive set of debugging tools for
plugin developers. plugin developers.
</para> </para>
<sect1> <sect1 id="section-debugging-command-line">
<title>Command line options</title> <title>Command line options</title>
<para> <para>
Applications using the GStreamer libraries accept the following set Applications using the GStreamer libraries accept the following set
@ -94,7 +94,7 @@ Mask (to be OR'ed) info/debug FLAGS
0x02000000 / REFCOUNTING 0x02000000 / REFCOUNTING
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-debugging-adding-handler">
<title>Adding a custom debug handler</title> <title>Adding a custom debug handler</title>
<para> <para>
</para> </para>

10
docs/manual/dparams-app.xml
View file

@ -1,7 +1,7 @@
<chapter id="cha-dparams"> <chapter id="chapter-dparams">
<title>Dynamic Parameters</title> <title>Dynamic Parameters</title>
<sect1> <sect1 id="section-dparams-getting-started">
<title>Getting Started</title> <title>Getting Started</title>
<para> <para>
The Dynamic Parameters subsystem is contained within the The Dynamic Parameters subsystem is contained within the
@ -31,7 +31,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-creating">
<title>Creating and Attaching Dynamic Parameters</title> <title>Creating and Attaching Dynamic Parameters</title>
<para> <para>
Once you have created your elements you can create and attach dparams to them. Once you have created your elements you can create and attach dparams to them.
@ -81,7 +81,7 @@
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-changing">
<title>Changing Dynamic Parameter Values</title> <title>Changing Dynamic Parameter Values</title>
<para> <para>
All interaction with dparams to actually set the dparam value is done through simple GObject properties. All interaction with dparams to actually set the dparam value is done through simple GObject properties.
@ -116,7 +116,7 @@
</sect1> </sect1>
<sect1> <sect1 id="section-dparams-types">
<title>Different Types of Dynamic Parameter</title> <title>Different Types of Dynamic Parameter</title>
<para> <para>
There are currently only two implementations of dparams so far. They are both for real-time use so There are currently only two implementations of dparams so far. They are both for real-time use so

2
docs/manual/dynamic.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-dynamic"> <chapter id="chapter-dynamic">
<title>Dynamic pipelines</title> <title>Dynamic pipelines</title>
<para> <para>
In this chapter we will see how you can create a dynamic pipeline. A In this chapter we will see how you can create a dynamic pipeline. A

16
docs/manual/elements-api.xml
View file

@ -1,6 +1,6 @@
<chapter id="cha-elements-api"> <chapter id="chapter-elements-api">
<title>Elements</title> <title>Elements</title>
<sect1 id="sec-elements-create"> <sect1 id="section-elements-create">
<title>Creating a GstElement</title> <title>Creating a GstElement</title>
<para> <para>
A <classname>GstElement</classname> object is created from A <classname>GstElement</classname> object is created from
@ -55,7 +55,7 @@
gst_element_unref (element); gst_element_unref (element);
</programlisting> </programlisting>
</sect1> </sect1>
<sect1 id="sec-elements-properties"> <sect1 id="section-elements-properties">
<title>GstElement properties</title> <title>GstElement properties</title>
<para> <para>
A <classname>GstElement</classname> can have several properties A <classname>GstElement</classname> can have several properties
@ -105,7 +105,7 @@
</para> </para>
</sect1> </sect1>
<sect1 id="sec-elements-signals"> <sect1 id="section-elements-signals">
<title>GstElement signals</title> <title>GstElement signals</title>
<para> <para>
A <classname>GstElement</classname> also provides various A <classname>GstElement</classname> also provides various
@ -114,25 +114,25 @@
</para> </para>
</sect1> </sect1>
<sect1 id="sec-elements-factories"> <sect1 id="section-elements-factories">
<title>More about GstElementFactory</title> <title>More about GstElementFactory</title>
<para> <para>
We talk some more about the GstElementFactory object. We talk some more about the GstElementFactory object.
</para> </para>
<sect2 id="sec-elements-factories-details"> <sect2 id="section-elements-factories-details">
<title>Getting information about an element using the factory details</title> <title>Getting information about an element using the factory details</title>
<para> <para>
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-factories-padtemplates"> <sect2 id="section-elements-factories-padtemplates">
<title>Finding out what pads an element can contain</title> <title>Finding out what pads an element can contain</title>
<para> <para>
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-factories-query"> <sect2 id="section-elements-factories-query">
<title>Different ways of querying the factories</title> <title>Different ways of querying the factories</title>
<para> <para>
</para> </para>

30
docs/manual/elements.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-elements"> <chapter id="chapter-elements">
<title>Elements</title> <title>Elements</title>
<para> <para>
The most important object in <application>GStreamer</application> for the The most important object in <application>GStreamer</application> for the
application programmer is the <classname>GstElement</classname> object. application programmer is the <classname>GstElement</classname> object.
</para> </para>
<sect1 id="sec-elements-design"> <sect1 id="section-elements-design">
<title>What is an element ?</title> <title>What is an element ?</title>
<para> <para>
An element is the basic building block for the media pipeline. An element is the basic building block for the media pipeline.
@ -16,26 +16,26 @@
<para> <para>
Elements, from the perspective of GStreamer, are viewed as "black boxes" Elements, from the perspective of GStreamer, are viewed as "black boxes"
with a number of different aspects. One of these aspects is the presence with a number of different aspects. One of these aspects is the presence
of "pads" (see <xref linkend="cha-pads"/>), or link points. This terminology arises from soldering; of "pads" (see <xref linkend="chapter-pads"/>), or link points. This terminology arises from soldering;
pads are where wires can be attached. pads are where wires can be attached.
</para> </para>
</sect1> </sect1>
<sect1 id="sec-elements-types"> <sect1 id="section-elements-types">
<title>Types of elements</title> <title>Types of elements</title>
<sect2 id="sec-elements-src"> <sect2 id="section-elements-src">
<title>Source elements</title> <title>Source elements</title>
<para> <para>
Source elements generate data for use by a pipeline, for example Source elements generate data for use by a pipeline, for example
reading from disk or from a sound card. reading from disk or from a sound card.
</para> </para>
<para> <para>
<xref linkend="sec-element-srcimg"/> shows how we will visualise <xref linkend="section-element-srcimg"/> shows how we will visualise
a source element. a source element.
We always draw a source pad to the right of the element. We always draw a source pad to the right of the element.
</para> </para>
<figure float="1" id="sec-element-srcimg"> <figure float="1" id="section-element-srcimg">
<title>Visualisation of a source element</title> <title>Visualisation of a source element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -50,7 +50,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-filter"> <sect2 id="section-elements-filter">
<title>Filters and codecs</title> <title>Filters and codecs</title>
<para> <para>
Filter elements have both input and output pads. They operate on Filter elements have both input and output pads. They operate on
@ -63,7 +63,7 @@
for example, a video mixer might have two input pads (the images of for example, a video mixer might have two input pads (the images of
the two different video streams) and one output pad. the two different video streams) and one output pad.
</para> </para>
<figure float="1" id="sec-element-filterimg"> <figure float="1" id="section-element-filterimg">
<title>Visualisation of a filter element</title> <title>Visualisation of a filter element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -72,12 +72,12 @@
</mediaobject> </mediaobject>
</figure> </figure>
<para> <para>
<xref linkend="sec-element-filterimg"/> shows how we will visualise <xref linkend="section-element-filterimg"/> shows how we will visualise
a filter element. a filter element.
This element has one sink (input) pad and one source (output) pad. This element has one sink (input) pad and one source (output) pad.
Sink pads are drawn on the left of the element. Sink pads are drawn on the left of the element.
</para> </para>
<figure float="1" id="sec-element-multifilterimg"> <figure float="1" id="section-element-multifilterimg">
<title>Visualisation of a filter element with <title>Visualisation of a filter element with
more than one output pad</title> more than one output pad</title>
<mediaobject> <mediaobject>
@ -88,7 +88,7 @@
</mediaobject> </mediaobject>
</figure> </figure>
<para> <para>
<xref linkend="sec-element-filterimg"/> shows the visualisation of a filter element with <xref linkend="section-element-filterimg"/> shows the visualisation of a filter element with
more than one output pad. An example of such a filter is the AVI more than one output pad. An example of such a filter is the AVI
demultiplexer. This element will parse the input data and demultiplexer. This element will parse the input data and
extract the audio and video data. Most of these filters dynamically extract the audio and video data. Most of these filters dynamically
@ -97,15 +97,15 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-elements-sink"> <sect2 id="section-elements-sink">
<title>Sink elements</title> <title>Sink elements</title>
<para> <para>
Sink elements are end points in a media pipeline. They accept Sink elements are end points in a media pipeline. They accept
data but do not produce anything. Disk writing, soundcard playback, data but do not produce anything. Disk writing, soundcard playback,
and video output would all be implemented by sink elements. and video output would all be implemented by sink elements.
<xref linkend="sec-element-sinkimg"/> shows a sink element. <xref linkend="section-element-sinkimg"/> shows a sink element.
</para> </para>
<figure float="1" id="sec-element-sinkimg"> <figure float="1" id="section-element-sinkimg">
<title>Visualisation of a sink element</title> <title>Visualisation of a sink element</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

18
docs/manual/factories.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-factories"> <chapter id="chapter-factories">
<title>More on factories</title> <title>More on factories</title>
<para> <para>
The small application we created in the previous chapter used the The small application we created in the previous chapter used the
@ -11,7 +11,7 @@
We will first explain the concepts involved before we move on We will first explain the concepts involved before we move on
to the reworked helloworld example using autoplugging. to the reworked helloworld example using autoplugging.
</para> </para>
<sect1> <sect1 id="section-factories-helloworld-problems">
<title>The problems with the helloworld example</title> <title>The problems with the helloworld example</title>
<para> <para>
If we take a look at how the elements were created in the previous If we take a look at how the elements were created in the previous
@ -40,7 +40,7 @@
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-mime">
<title>More on MIME Types</title> <title>More on MIME Types</title>
<para> <para>
GStreamer uses MIME types to identify the different types of data GStreamer uses MIME types to identify the different types of data
@ -82,10 +82,10 @@
</para> </para>
<para> <para>
<xref linkend="sec-mime-img"/> shows the MIME types associated with <xref linkend="section-mime-img"/> shows the MIME types associated with
each pad from the "hello world" example. each pad from the "hello world" example.
</para> </para>
<figure float="1" id="sec-mime-img"> <figure float="1" id="section-mime-img">
<title>The Hello world pipeline with MIME types</title> <title>The Hello world pipeline with MIME types</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -115,7 +115,7 @@
</sect1> </sect1>
<sect1> <sect1 id="section-factories-gstreamer-types">
<title>GStreamer types</title> <title>GStreamer types</title>
<para> <para>
GStreamer assigns a unique number to all registered MIME types. GStreamer assigns a unique number to all registered MIME types.
@ -204,12 +204,12 @@ struct _GstType {
This function will return 0 if the extension was not known. This function will return 0 if the extension was not known.
</para> </para>
<para> <para>
For more information, see <xref linkend="cha-autoplug"/>. For more information, see <xref linkend="chapter-autoplug"/>.
</para> </para>
</sect2> </sect2>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-create">
<title>Creating elements with the factory</title> <title>Creating elements with the factory</title>
<para> <para>
In the previous section we described how you could obtain In the previous section we described how you could obtain
@ -232,7 +232,7 @@ struct _GstType {
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-factories-basic-types">
<title>GStreamer basic types</title> <title>GStreamer basic types</title>
<para> <para>
GStreamer only has two builtin types: GStreamer only has two builtin types:

2
docs/manual/gnome.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-gnome"> <chapter id="chapter-gnome">
<title>GNOME integration</title> <title>GNOME integration</title>
<para> <para>
GStreamer is fairly easy to integrate with GNOME applications. GStreamer is fairly easy to integrate with GNOME applications.

18
docs/manual/goals.xml
View file

@ -1,16 +1,16 @@
<chapter id="cha-goals"> <chapter id="chapter-goals">
<title>Goals</title> <title>Goals</title>
<para> <para>
GStreamer was designed to provide a solution to the current Linux media GStreamer was designed to provide a solution to the current Linux media
problems. problems.
</para> </para>
<sect1 id="sec-goals-design"> <sect1 id="section-goals-design">
<title>The design goals</title> <title>The design goals</title>
<para> <para>
We describe what we try to achieve with GStreamer. We describe what we try to achieve with GStreamer.
</para> </para>
<sect2 id="sec-goals-clean"> <sect2 id="section-goals-clean">
<title>Clean and powerful</title> <title>Clean and powerful</title>
<para> <para>
GStreamer wants to provide a clean interface to: GStreamer wants to provide a clean interface to:
@ -35,7 +35,7 @@
</itemizedlist> </itemizedlist>
</sect2> </sect2>
<sect2 id="sec-goals-object"> <sect2 id="section-goals-object">
<title>Object oriented</title> <title>Object oriented</title>
<para> <para>
GStreamer adheres to the GLib 2.0 object model. A programmer familiar with GLib 2.0 or older versions GStreamer adheres to the GLib 2.0 object model. A programmer familiar with GLib 2.0 or older versions
@ -55,7 +55,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-goals-extensible"> <sect2 id="section-goals-extensible">
<title>Extensible</title> <title>Extensible</title>
<para> <para>
All GStreamer Objects can be extended using the GObject inheritance methods. All GStreamer Objects can be extended using the GObject inheritance methods.
@ -66,7 +66,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-goals-binary"> <sect2 id="section-goals-binary">
<title>Allow binary only plugins</title> <title>Allow binary only plugins</title>
<para> <para>
Plugins are shared libraries that are loaded at runtime. Since all the properties of the Plugins are shared libraries that are loaded at runtime. Since all the properties of the
@ -79,7 +79,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-goals-performance"> <sect2 id="section-goals-performance">
<title>High performance</title> <title>High performance</title>
<para> <para>
High performance is obtained by: High performance is obtained by:
@ -138,7 +138,7 @@
</itemizedlist> </itemizedlist>
</sect2> </sect2>
<sect2 id="sec-goals-separation"> <sect2 id="section-goals-separation">
<title>Clean core/plugins separation</title> <title>Clean core/plugins separation</title>
<para> <para>
The core of GStreamer is essentially media-agnostic. It only knows The core of GStreamer is essentially media-agnostic. It only knows
@ -152,7 +152,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-goals-testbed"> <sect2 id="section-goals-testbed">
<title>Provide a framework for codec experimentation</title> <title>Provide a framework for codec experimentation</title>
<para> <para>
GStreamer also wants to be an easy framework where codec GStreamer also wants to be an easy framework where codec

10
docs/manual/helloworld.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-hello"> <chapter id="chapter-hello-world">
<title>Your first application</title> <title>Your first application</title>
<para> <para>
This chapter describes the most rudimentary aspects of a This chapter describes the most rudimentary aspects of a
@ -7,7 +7,7 @@
pausing and stopping the pipeline. pausing and stopping the pipeline.
</para> </para>
<sect1> <sect1 id="section-hello-world">
<title>Hello world</title> <title>Hello world</title>
<para> <para>
We will create a simple first application, a complete MP3 player, using We will create a simple first application, a complete MP3 player, using
@ -177,7 +177,7 @@ main (int argc, char *argv[])
We now have a created a complete pipeline. We can visualise the We now have a created a complete pipeline. We can visualise the
pipeline as follows: pipeline as follows:
</para> </para>
<figure float="1" id="sec-hello-img"> <figure float="1" id="section-hello-img">
<title>The "hello world" pipeline</title> <title>The "hello world" pipeline</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>
@ -232,7 +232,7 @@ main (int argc, char *argv[])
</sect1> </sect1>
<sect1> <sect1 id="section-hello-world-compile">
<title>Compiling helloworld.c</title> <title>Compiling helloworld.c</title>
<para> <para>
To compile the helloworld example, use: To compile the helloworld example, use:
@ -256,7 +256,7 @@ main (int argc, char *argv[])
</programlisting> </programlisting>
</sect1> </sect1>
<sect1> <sect1 id="section-hello-world-conclusion">
<title>Conclusion</title> <title>Conclusion</title>
<para> <para>
This concludes our first example. As you see, setting up a pipeline This concludes our first example. As you see, setting up a pipeline

2
docs/manual/helloworld2.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-hello2"> <chapter id="chapter-hello2">
<title>Your second application</title> <title>Your second application</title>
<para> <para>
FIXME: delete this section, talk more about the spider. In a previous chapter we created a first FIXME: delete this section, talk more about the spider. In a previous chapter we created a first

37
docs/manual/highlevel-components.xml
View file

@ -1,37 +0,0 @@
<chapter id="cha-components">
<title>Components</title>
<para>
FIXME: This chapter is way out of date.
</para>
<para>
<application>GStreamer</application> includes components that people can include
in their programs.
</para>
<sect1>
<title>GstPlay</title>
<para>
GstPlay is a GtkWidget with a simple API to play, pause and stop a media file.
</para>
</sect1>
<sect1>
<title>GstMediaPlay</title>
<para>
GstMediaply is a complete player widget.
</para>
</sect1>
<sect1>
<title>GstEditor</title>
<para>
GstEditor is a set of widgets to display a graphical representation of a
pipeline.
</para>
</sect1>
</chapter>

283
docs/manual/highlevel-xml.xml
View file

@ -1,283 +0,0 @@
<chapter id="cha-xml">
<title>XML in <application>GStreamer</application></title>
<para>
<application>GStreamer</application> uses XML to store and load
its pipeline definitions. XML is also used internally to manage the
plugin registry. The plugin registry is a file that contains the definition
of all the plugins <application>GStreamer</application> knows about to have
quick access to the specifics of the plugins.
</para>
<para>
We will show you how you can save a pipeline to XML and how you can reload that
XML file again for later use.
</para>
<sect1 id="sec-xml-write">
<title>Turning GstElements into XML</title>
<para>
We create a simple pipeline and write it to stdout with
gst_xml_write_file (). The following code constructs an MP3 player
pipeline with two threads and then writes out the XML both to stdout
and to a file. Use this program with one argument: the MP3 file on disk.
</para>
<programlisting>
/* example-begin xml-mp3.c */
#include &lt;stdlib.h&gt;
#include &lt;gst/gst.h&gt;
gboolean playing;
int
main (int argc, char *argv[])
{
GstElement *filesrc, *osssink, *queue, *queue2, *decode;
GstElement *bin;
GstElement *thread, *thread2;
gst_init (&amp;argc,&amp;argv);
if (argc != 2) {
g_print ("usage: %s &lt;mp3 filename&gt;\n", argv[0]);
exit (-1);
}
/* create a new thread to hold the elements */
thread = gst_element_factory_make ("thread", "thread");
g_assert (thread != NULL);
thread2 = gst_element_factory_make ("thread", "thread2");
g_assert (thread2 != NULL);
/* create a new bin to hold the elements */
bin = gst_bin_new ("bin");
g_assert (bin != NULL);
/* create a disk reader */
filesrc = gst_element_factory_make ("filesrc", "disk_source");
g_assert (filesrc != NULL);
g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
queue = gst_element_factory_make ("queue", "queue");
queue2 = gst_element_factory_make ("queue", "queue2");
/* and an audio sink */
osssink = gst_element_factory_make ("osssink", "play_audio");
g_assert (osssink != NULL);
decode = gst_element_factory_make ("mad", "decode");
g_assert (decode != NULL);
/* add objects to the main bin */
gst_bin_add_many (GST_BIN (bin), filesrc, queue, NULL);
gst_bin_add_many (GST_BIN (thread), decode, queue2, NULL);
gst_bin_add (GST_BIN (thread2), osssink);
gst_element_link_many (filesrc, queue, decode, queue2, osssink, NULL);
gst_bin_add_many (GST_BIN (bin), thread, thread2, NULL);
/* write the bin to stdout */
gst_xml_write_file (GST_ELEMENT (bin), stdout);
/* write the bin to a file */
gst_xml_write_file (GST_ELEMENT (bin), fopen ("xmlTest.gst", "w"));
exit (0);
}
/* example-end xml-mp3.c */
</programlisting>
<para>
The most important line is:
</para>
<programlisting>
gst_xml_write_file (GST_ELEMENT (bin), stdout);
</programlisting>
<para>
gst_xml_write_file () will turn the given element into an xmlDocPtr that
is then formatted and saved to a file. To save to disk, pass the result
of a fopen(2) as the second argument.
</para>
<para>
The complete element hierarchy will be saved along with the inter element
pad links and the element parameters. Future <application>GStreamer</application>
versions will also allow you to store the signals in the XML file.
</para>
</sect1>
<sect1 id="sec-xml-load">
<title>Loading a GstElement from an XML file</title>
<para>
Before an XML file can be loaded, you must create a GstXML object.
A saved XML file can then be loaded with the
gst_xml_parse_file (xml, filename, rootelement) method.
The root element can optionally left NULL. The following code example loads
the previously created XML file and runs it.
</para>
<programlisting>
#include &lt;stdlib.h&gt;
#include &lt;gst/gst.h&gt;
int
main(int argc, char *argv[])
{
GstXML *xml;
GstElement *bin;
gboolean ret;
gst_init (&amp;argc, &amp;argv);
xml = gst_xml_new ();
ret = gst_xml_parse_file(xml, "xmlTest.gst", NULL);
g_assert (ret == TRUE);
bin = gst_xml_get_element (xml, "bin");
g_assert (bin != NULL);
gst_element_set_state (bin, GST_STATE_PLAYING);
while (gst_bin_iterate(GST_BIN(bin)));
gst_element_set_state (bin, GST_STATE_NULL);
exit (0);
}
</programlisting>
<para>
gst_xml_get_element (xml, "name") can be used to get a specific element
from the XML file.
</para>
<para>
gst_xml_get_topelements (xml) can be used to get a list of all toplevel elements
in the XML file.
</para>
<para>
In addition to loading a file, you can also load a from a xmlDocPtr and
an in memory buffer using gst_xml_parse_doc and gst_xml_parse_memory
respectively. Both of these methods return a gboolean indicating
success or failure of the requested action.
</para>
</sect1>
<sect1 id="sec-xml-custom">
<title>Adding custom XML tags into the core XML data</title>
<para>
It is possible to add custom XML tags to the core XML created with
gst_xml_write. This feature can be used by an application to add more
information to the save plugins. The editor will for example insert
the position of the elements on the screen using the custom XML tags.
</para>
<para>
It is strongly suggested to save and load the custom XML tags using
a namespace. This will solve the problem of having your XML tags
interfere with the core XML tags.
</para>
<para>
To insert a hook into the element saving procedure you can link
a signal to the GstElement using the following piece of code:
</para>
<programlisting>
xmlNsPtr ns;
...
ns = xmlNewNs (NULL, "http://gstreamer.net/gst-test/1.0/", "test");
...
thread = gst_element_factory_make ("thread", "thread");
g_signal_connect (G_OBJECT (thread), "object_saved",
G_CALLBACK (object_saved), g_strdup ("decoder thread"));
...
</programlisting>
<para>
When the thread is saved, the object_save method will be called. Our example
will insert a comment tag:
</para>
<programlisting>
static void
object_saved (GstObject *object, xmlNodePtr parent, gpointer data)
{
xmlNodePtr child;
child = xmlNewChild (parent, ns, "comment", NULL);
xmlNewChild (child, ns, "text", (gchar *)data);
}
</programlisting>
<para>
Adding the custom tag code to the above example you will get an XML file
with the custom tags in it. Here's an excerpt:
</para>
<programlisting>
...
&lt;gst:element&gt;
&lt;gst:name&gt;thread&lt;/gst:name&gt;
&lt;gst:type&gt;thread&lt;/gst:type&gt;
&lt;gst:version&gt;0.1.0&lt;/gst:version&gt;
...
&lt;/gst:children&gt;
&lt;test:comment&gt;
&lt;test:text&gt;decoder thread&lt;/test:text&gt;
&lt;/test:comment&gt;
&lt;/gst:element&gt;
...
</programlisting>
<para>
To retrieve the custom XML again, you need to attach a signal to
the GstXML object used to load the XML data. You can then parse your
custom XML from the XML tree whenever an object is loaded.
</para>
<para>
We can extend our previous example with the following piece of
code.
</para>
<programlisting>
xml = gst_xml_new ();
g_signal_connect (G_OBJECT (xml), "object_loaded",
G_CALLBACK (xml_loaded), xml);
ret = gst_xml_parse_file (xml, "xmlTest.gst", NULL);
g_assert (ret == TRUE);
</programlisting>
<para>
Whenever a new object has been loaded, the xml_loaded function will
be called. This function looks like:
</para>
<programlisting>
static void
xml_loaded (GstXML *xml, GstObject *object, xmlNodePtr self, gpointer data)
{
xmlNodePtr children = self-&gt;xmlChildrenNode;
while (children) {
if (!strcmp (children-&gt;name, "comment")) {
xmlNodePtr nodes = children-&gt;xmlChildrenNode;
while (nodes) {
if (!strcmp (nodes-&gt;name, "text")) {
gchar *name = g_strdup (xmlNodeGetContent (nodes));
g_print ("object %s loaded with comment '%s'\n",
gst_object_get_name (object), name);
}
nodes = nodes-&gt;next;
}
}
children = children-&gt;next;
}
}
</programlisting>
<para>
As you can see, you'll get a handle to the GstXML object, the
newly loaded GstObject and the xmlNodePtr that was used to create
this object. In the above example we look for our special tag inside
the XML tree that was used to load the object and we print our
comment to the console.
</para>
</sect1>
</chapter>

2
docs/manual/init-api.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-initialisation"> <chapter id="chapter-initialisation">
<title>Initializing <application>GStreamer</application></title> <title>Initializing <application>GStreamer</application></title>
<para> <para>
When writing a <application>GStreamer</application> application, you can When writing a <application>GStreamer</application> application, you can

14
docs/manual/intro-motivation.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-motivation"> <chapter id="chapter-motivation">
<title>Motivation</title> <title>Motivation</title>
<para> <para>
Linux has historically lagged behind other operating systems in the multimedia Linux has historically lagged behind other operating systems in the multimedia
@ -9,12 +9,12 @@
with the professional level of software available for MS Windows and MacOS. with the professional level of software available for MS Windows and MacOS.
</para> </para>
<sect1 id="sec-motivation-problems"> <sect1 id="section-motivation-problems">
<title>Current problems</title> <title>Current problems</title>
<para> <para>
We describe the typical problems in today's media handling on Linux. We describe the typical problems in today's media handling on Linux.
</para> </para>
<sect2 id="sec-motivation-duplicate"> <sect2 id="section-motivation-duplicate">
<title>Multitude of duplicate code</title> <title>Multitude of duplicate code</title>
<para> <para>
The Linux user who wishes to hear a sound file must hunt through their collection of The Linux user who wishes to hear a sound file must hunt through their collection of
@ -28,7 +28,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-goal"> <sect2 id="section-motivation-goal">
<title>'One goal' media players/libraries</title> <title>'One goal' media players/libraries</title>
<para> <para>
Your typical MPEG player was designed to play MPEG video and audio. Most of Your typical MPEG player was designed to play MPEG video and audio. Most of
@ -51,7 +51,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-plugin"> <sect2 id="section-motivation-plugin">
<title>Non unified plugin mechanisms</title> <title>Non unified plugin mechanisms</title>
<para> <para>
Your typical media player might have a plugin for different media Your typical media player might have a plugin for different media
@ -74,7 +74,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-network"> <sect2 id="section-motivation-network">
<title>Provision for network transparency</title> <title>Provision for network transparency</title>
<para> <para>
No infrastructure is present to allow network transparent media No infrastructure is present to allow network transparent media
@ -94,7 +94,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-catchup"> <sect2 id="section-motivation-catchup">
<title>Catch up with the <trademark>Windows</trademark> world</title> <title>Catch up with the <trademark>Windows</trademark> world</title>
<para> <para>
We need solid media handling if we want to see Linux succeed on We need solid media handling if we want to see Linux succeed on

59
docs/manual/intro-preface.xml
View file

@ -1,59 +0,0 @@
<chapter id="cha-intro">
<title>Introduction</title>
<para>
This chapter gives you an overview of the technologies described in this
book.
</para>
<sect1 id="sec-intro-what">
<title>What is GStreamer?</title>
<para>
GStreamer is a framework for creating streaming media applications.
The fundamental design comes from the video pipeline at Oregon Graduate
Institute, as well as some ideas from DirectShow.
</para>
<para>
GStreamer's development framework makes it possible to write any type of
streaming multimedia application. The GStreamer framework is designed
to make it easy to write applications that handle audio or video or both.
It isn't restricted to audio and video, and can process any kind of
data flow.
The pipeline design is made to have little overhead above what the
applied filters induce. This makes GStreamer a good framework for designing
even high-end audio applications which put high demands on latency.
</para>
<para>
One of the the most obvious uses of GStreamer is using it to build
a media player. GStreamer already includes components for building a
media player that can support a very wide variety of formats, including
MP3, Ogg Vorbis, MPEG1, MPEG2, AVI, Quicktime, mod, and more. GStreamer,
however, is much more than just another media player. Its main advantages
are that the pluggable components can be mixed and matched into arbitrary
pipelines so that it's possible to write a full-fledged video or audio
editing application.
</para>
<para>
The framework is based on plugins that will provide the various codec
and other functionality. The plugins can be linked and arranged in
a pipeline. This pipeline defines the flow of the data. Pipelines can
also be edited with a GUI editor and saved as XML so that pipeline
libraries can be made with a minimum of effort.
</para>
<para>
The GStreamer core function is to provide a framework for plugins, data flow
and media type handling/negotiation.
It also provides an API to write applications using the various plugins.
</para>
<para>
This book is about GStreamer from a developer's point of view; it describes
how to write a GStreamer application using the GStreamer libraries and tools.
For an explanation about writing plugins, we suggest the Plugin Writers Guide.
</para>
</sect1>
</chapter>

4
docs/manual/intro.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-intro"> <chapter id="chapter-intro">
<title>Introduction</title> <title>Introduction</title>
<para> <para>
This chapter gives you an overview of the technologies described in this This chapter gives you an overview of the technologies described in this
book. book.
</para> </para>
<sect1 id="sec-intro-what"> <sect1 id="section-intro-what">
<title>What is GStreamer?</title> <title>What is GStreamer?</title>
<para> <para>
GStreamer is a framework for creating streaming media applications. GStreamer is a framework for creating streaming media applications.

8
docs/manual/links-api.xml
View file

@ -1,6 +1,6 @@
<chapter id="cha-links-api"> <chapter id="chapter-links-api">
<title>Linking elements</title> <title>Linking elements</title>
<sect1 id="sec-link-basic"> <sect1 id="section-link-basic">
<title>Making simple links</title> <title>Making simple links</title>
<para> <para>
You can link two pads with: You can link two pads with:
@ -66,12 +66,12 @@
</para> </para>
</sect1> </sect1>
<sect1 id="sec-link-filtered"> <sect1 id="section-link-filtered">
<title>Making filtered links</title> <title>Making filtered links</title>
<para> <para>
You can also force a specific media type on the link by using gst_pad_link_filtered () You can also force a specific media type on the link by using gst_pad_link_filtered ()
and gst_element_link_filtered () with capabilities. and gst_element_link_filtered () with capabilities.
See <xref linkend="sec-caps"/> for See <xref linkend="section-caps"/> for
an explanation of capabilities. an explanation of capabilities.
</para> </para>
</sect1> </sect1>

4
docs/manual/links.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-links"> <chapter id="chapter-links">
<title>Linking elements</title> <title>Linking elements</title>
<para> <para>
You can link the different pads of elements together so that the elements You can link the different pads of elements together so that the elements
form a chain. form a chain.
</para> </para>
<figure float="1" id="sec-link"> <figure float="1" id="section-link">
<title>Visualisation of three linked elements</title> <title>Visualisation of three linked elements</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

22
docs/manual/manual.xml
View file

@ -88,7 +88,7 @@
</author> </author>
</authorgroup> </authorgroup>
<legalnotice id="legalnotice"> <legalnotice id="misc-legalnotice">
<para> <para>
This material may be distributed only subject to the terms and This material may be distributed only subject to the terms and
conditions set forth in the Open Publication License, v1.0 or later (the conditions set forth in the Open Publication License, v1.0 or later (the
@ -104,16 +104,16 @@
<!-- ############# Overview - part ############### --> <!-- ############# Overview - part ############### -->
<part id="overview"><title>Overview</title> <part id="part-overview"><title>Overview</title>
<partintro> <partintro>
<para> <para>
<xref linkend="overview"/> gives you an overview of <xref linkend="part-overview"/> gives you an overview of
<application>GStreamer</application> design goals. <application>GStreamer</application> design goals.
<xref linkend="basic-concepts"/> rapidly covers the basics of <xref linkend="part-basic-concepts"/> rapidly covers the basics of
<application>GStreamer</application> programming. <application>GStreamer</application> programming.
In <xref linkend="build-app"/> we will move on to the In <xref linkend="part-build-app"/> we will move on to the
examples. Since <application>GStreamer</application> uses <ulink examples. Since <application>GStreamer</application> uses <ulink
url="http://developer.gnome.org/arch/gtk/glib.html" type="http">GLib url="http://developer.gnome.org/arch/gtk/glib.html" type="http">GLib
2.0</ulink>, the reader is assumed to understand the basics of the 2.0</ulink>, the reader is assumed to understand the basics of the
@ -138,7 +138,7 @@
<!-- ############ Basic concepts - part ############# --> <!-- ############ Basic concepts - part ############# -->
<part id="basic-concepts"><title>Basic Concepts</title> <part id="part-basic-concepts"><title>Basic Concepts</title>
<partintro> <partintro>
<para> <para>
We will first describe the basics of We will first describe the basics of
@ -167,7 +167,7 @@
</part> </part>
<!-- ############ Basic API - part ############# --> <!-- ############ Basic API - part ############# -->
<part id="basic-api"><title>Basic API</title> <part id="part-basic-api"><title>Basic API</title>
&INIT-API; &INIT-API;
&ELEMENTS-API; &ELEMENTS-API;
@ -189,7 +189,7 @@
<!-- ############ Building Apps - part ############# --> <!-- ############ Building Apps - part ############# -->
<part id="build-app"><title>Building an application</title> <part id="part-build-app"><title>Building an application</title>
<partintro> <partintro>
<para> <para>
@ -209,7 +209,7 @@
<!-- ############ Advanced GStreamer - part ############# --> <!-- ############ Advanced GStreamer - part ############# -->
<part id="advanced"><title>Advanced <application>GStreamer</application> concepts</title> <part id="part-advanced"><title>Advanced <application>GStreamer</application> concepts</title>
<partintro> <partintro>
<para> <para>
@ -244,7 +244,7 @@
<!-- ############ XML in GStreamer - part ############# --> <!-- ############ XML in GStreamer - part ############# -->
<part id="xml-gstreamer"><title>XML in <application>GStreamer</application></title> <part id="part-xml-gstreamer"><title>XML in <application>GStreamer</application></title>
<partintro> <partintro>
<para> <para>
@ -260,7 +260,7 @@
<!-- ############ Appendices - part ############# --> <!-- ############ Appendices - part ############# -->
<part id="appendices"> <part id="part-appendices">
<title>Appendices</title> <title>Appendices</title>
<partintro> <partintro>

14
docs/manual/motivation.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-motivation"> <chapter id="chapter-motivation">
<title>Motivation</title> <title>Motivation</title>
<para> <para>
Linux has historically lagged behind other operating systems in the multimedia Linux has historically lagged behind other operating systems in the multimedia
@ -9,12 +9,12 @@
with the professional level of software available for MS Windows and MacOS. with the professional level of software available for MS Windows and MacOS.
</para> </para>
<sect1 id="sec-motivation-problems"> <sect1 id="section-motivation-problems">
<title>Current problems</title> <title>Current problems</title>
<para> <para>
We describe the typical problems in today's media handling on Linux. We describe the typical problems in today's media handling on Linux.
</para> </para>
<sect2 id="sec-motivation-duplicate"> <sect2 id="section-motivation-duplicate">
<title>Multitude of duplicate code</title> <title>Multitude of duplicate code</title>
<para> <para>
The Linux user who wishes to hear a sound file must hunt through their collection of The Linux user who wishes to hear a sound file must hunt through their collection of
@ -28,7 +28,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-goal"> <sect2 id="section-motivation-goal">
<title>'One goal' media players/libraries</title> <title>'One goal' media players/libraries</title>
<para> <para>
Your typical MPEG player was designed to play MPEG video and audio. Most of Your typical MPEG player was designed to play MPEG video and audio. Most of
@ -51,7 +51,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-plugin"> <sect2 id="section-motivation-plugin">
<title>Non unified plugin mechanisms</title> <title>Non unified plugin mechanisms</title>
<para> <para>
Your typical media player might have a plugin for different media Your typical media player might have a plugin for different media
@ -74,7 +74,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-network"> <sect2 id="section-motivation-network">
<title>Provision for network transparency</title> <title>Provision for network transparency</title>
<para> <para>
No infrastructure is present to allow network transparent media No infrastructure is present to allow network transparent media
@ -94,7 +94,7 @@
</para> </para>
</sect2> </sect2>
<sect2 id="sec-motivation-catchup"> <sect2 id="section-motivation-catchup">
<title>Catch up with the <trademark>Windows</trademark> world</title> <title>Catch up with the <trademark>Windows</trademark> world</title>
<para> <para>
We need solid media handling if we want to see Linux succeed on We need solid media handling if we want to see Linux succeed on

20
docs/manual/pads-api.xml
View file

@ -1,13 +1,13 @@
<chapter id="cha-pads-api"> <chapter id="chapter-pads-api">
<title>Pads</title> <title>Pads</title>
<para> <para>
As we have seen in <xref linkend="cha-elements"/>, the pads are the element's As we have seen in <xref linkend="chapter-elements"/>, the pads are the element's
interface to the outside world. interface to the outside world.
</para> </para>
<para> <para>
The specific type of media that the element can handle will be exposed by the pads. The specific type of media that the element can handle will be exposed by the pads.
The description of this media type is done with capabilities(see The description of this media type is done with capabilities(see
<xref linkend="sec-caps"/>) <xref linkend="section-caps"/>)
</para> </para>
<para> <para>
@ -24,10 +24,10 @@
</para></footnote> </para></footnote>
</para> </para>
<sect1 id="sec-pads-api-type"> <sect1 id="section-pads-api-type">
<title>Types of pads</title> <title>Types of pads</title>
<sect2 id="sec-pads-api-dynamic"> <sect2 id="section-pads-api-dynamic">
<title>Dynamic pads</title> <title>Dynamic pads</title>
<para> <para>
You can attach a signal to an element to inform you when the element has created You can attach a signal to an element to inform you when the element has created
@ -75,7 +75,7 @@ main(int argc, char *argv[])
</para> </para>
</note> </note>
</sect2> </sect2>
<sect2 id="sec-pads-api-request"> <sect2 id="section-pads-api-request">
<title>Request pads</title> <title>Request pads</title>
<para> <para>
The following piece of code can be used to get a pad from the tee element. After The following piece of code can be used to get a pad from the tee element. After
@ -120,7 +120,7 @@ main(int argc, char *argv[])
</sect1> </sect1>
<sect1 id="sec-api-caps"> <sect1 id="section-api-caps">
<title>Capabilities of a pad</title> <title>Capabilities of a pad</title>
<para> <para>
Since the pads play a very important role in how the element is viewed by the Since the pads play a very important role in how the element is viewed by the
@ -133,7 +133,7 @@ main(int argc, char *argv[])
Plugin Writer's Guide. Plugin Writer's Guide.
</para> </para>
<sect2 id="sec-pads-api-caps"> <sect2 id="section-pads-api-caps">
<title>Capabilities</title> <title>Capabilities</title>
<para> <para>
Capabilities are attached to a pad in order to describe Capabilities are attached to a pad in order to describe
@ -156,7 +156,7 @@ struct _GstCaps {
</programlisting> </programlisting>
</sect2> </sect2>
<sect2 id="sec-pads-api-caps-get"> <sect2 id="section-pads-api-caps-get">
<title>Getting the capabilities of a pad</title> <title>Getting the capabilities of a pad</title>
<para> <para>
A pad can have a chain of capabilities attached to it. You can get the capabilities chain A pad can have a chain of capabilities attached to it. You can get the capabilities chain
@ -179,7 +179,7 @@ struct _GstCaps {
... ...
</programlisting> </programlisting>
</sect2> </sect2>
<sect2 id="sec-pads-api-caps-create"> <sect2 id="section-pads-api-caps-create">
<title>Creating capability structures</title> <title>Creating capability structures</title>
<para> <para>
While capabilities are mainly used inside a plugin to describe the While capabilities are mainly used inside a plugin to describe the

20
docs/manual/pads.xml
View file

@ -1,13 +1,13 @@
<chapter id="cha-pads"> <chapter id="chapter-pads">
<title>Pads</title> <title>Pads</title>
<para> <para>
As we have seen in <xref linkend="cha-elements"/>, the pads are the element's As we have seen in <xref linkend="chapter-elements"/>, the pads are the element's
interface to the outside world. interface to the outside world.
</para> </para>
<para> <para>
The specific type of media that the element can handle will be exposed by the pads. The specific type of media that the element can handle will be exposed by the pads.
The description of this media type is done with capabilities(see The description of this media type is done with capabilities(see
<xref linkend="sec-caps"/>) <xref linkend="section-caps"/>)
</para> </para>
<para> <para>
@ -24,10 +24,10 @@
</para></footnote> </para></footnote>
</para> </para>
<sect1 id="sec-pads-type"> <sect1 id="section-pads-type">
<title>Types of pads</title> <title>Types of pads</title>
<sect2 id="sec-pads-dynamic"> <sect2 id="section-pads-dynamic">
<title>Dynamic pads</title> <title>Dynamic pads</title>
<para> <para>
Some elements might not have all of their pads when the element is Some elements might not have all of their pads when the element is
@ -47,7 +47,7 @@
pipelines later on in this manual. pipelines later on in this manual.
</para> </para>
</sect2> </sect2>
<sect2 id="sec-pads-request"> <sect2 id="section-pads-request">
<title>Request pads</title> <title>Request pads</title>
<para> <para>
An element can also have request pads. These pads are not created An element can also have request pads. These pads are not created
@ -63,7 +63,7 @@
</sect1> </sect1>
<sect1 id="sec-caps"> <sect1 id="section-caps">
<title>Capabilities of a pad</title> <title>Capabilities of a pad</title>
<para> <para>
Since the pads play a very important role in how the element is viewed by the Since the pads play a very important role in how the element is viewed by the
@ -76,7 +76,7 @@
Plugin Writer's Guide. Plugin Writer's Guide.
</para> </para>
<sect2 id="sec-pads-caps"> <sect2 id="section-pads-caps">
<title>Capabilities</title> <title>Capabilities</title>
<para> <para>
Capabilities are attached to a pad in order to describe Capabilities are attached to a pad in order to describe
@ -137,7 +137,7 @@ Pads:
rate: Integer range: 11025 - 48000 rate: Integer range: 11025 - 48000
</programlisting> </programlisting>
</sect2> </sect2>
<sect2 id="sec-pads-props"> <sect2 id="section-pads-props">
<title>What are properties ?</title> <title>What are properties ?</title>
<para> <para>
Properties are used to describe extra information for Properties are used to describe extra information for
@ -217,7 +217,7 @@ Pads:
</itemizedlist> </itemizedlist>
</sect2> </sect2>
<sect2 id="sec-pads-caps-use"> <sect2 id="section-pads-caps-use">
<title>What capabilities are used for</title> <title>What capabilities are used for</title>
<para> <para>
Capabilities describe in great detail the type of media that is handled by the pads. Capabilities describe in great detail the type of media that is handled by the pads.

2
docs/manual/plugins-api.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-plugins-api"> <chapter id="chapter-plugins-api">
<title>Plugins</title> <title>Plugins</title>
<!-- FIXME: introduce type definitions before this chapter --> <!-- FIXME: introduce type definitions before this chapter -->
<para> <para>

2
docs/manual/plugins.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-plugins"> <chapter id="chapter-plugins">
<title>Plugins</title> <title>Plugins</title>
<!-- FIXME: introduce type definitions before this chapter --> <!-- FIXME: introduce type definitions before this chapter -->
<para> <para>

8
docs/manual/programs.xml
View file

@ -1,9 +1,9 @@
<chapter id="cha-programs"> <chapter id="chapter-programs">
<title>Programs</title> <title>Programs</title>
<para> <para>
</para> </para>
<sect1> <sect1 id="section-programs-gst-register">
<title><command>gst-register</command></title> <title><command>gst-register</command></title>
<para> <para>
<command>gst-register</command> is used to rebuild the database of plugins. <command>gst-register</command> is used to rebuild the database of plugins.
@ -12,7 +12,7 @@
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-programs-gst-launch">
<title><command>gst-launch</command></title> <title><command>gst-launch</command></title>
<para> <para>
This is a tool that will construct pipelines based on a command-line This is a tool that will construct pipelines based on a command-line
@ -149,7 +149,7 @@ main (int argc, char *argv[])
</sect2> </sect2>
</sect1> </sect1>
<sect1> <sect1 id="section-programs-gst-inspect">
<title><command>gst-inspect</command></title> <title><command>gst-inspect</command></title>
<para> <para>
This is a tool to query a plugin or an element about its properties. This is a tool to query a plugin or an element about its properties.

4
docs/manual/queues.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-queues"> <chapter id="chapter-queues">
<title>Queues</title> <title>Queues</title>
<para> <para>
A queue is a filter element. A queue is a filter element.
@ -22,7 +22,7 @@
Below is a figure of a two-threaded decoder. We have one thread (the main execution Below is a figure of a two-threaded decoder. We have one thread (the main execution
thread) reading the data from a file, and another thread decoding the data. thread) reading the data from a file, and another thread decoding the data.
</para> </para>
<figure float="1" id="sec-queues-img"> <figure float="1" id="section-queues-img">
<title>a two-threaded decoder with a queue</title> <title>a two-threaded decoder with a queue</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

2
docs/manual/quotes.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-quotes"> <chapter id="chapter-quotes">
<title>Quotes from the Developers</title> <title>Quotes from the Developers</title>
<para> <para>
As well as being a cool piece of software, As well as being a cool piece of software,

2
docs/manual/schedulers.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-scheduler"> <chapter id="chapter-scheduler">
<title>Understanding schedulers</title> <title>Understanding schedulers</title>
<para> <para>
The scheduler is responsible for managing the plugins at runtime. Its The scheduler is responsible for managing the plugins at runtime. Its

4
docs/manual/states-api.xml
View file

@ -1,6 +1,6 @@
<chapter id="cha-states-api"> <chapter id="chapter-states-api">
<title>Element states</title> <title>Element states</title>
<sect1 id="sec-states-api"> <sect1 id="section-states-api">
<title>Changing element state</title> <title>Changing element state</title>
<para> <para>
The state of an element can be changed with the following code: The state of an element can be changed with the following code:

14
docs/manual/states.xml
View file

@ -1,11 +1,11 @@
<chapter id="cha-states"> <chapter id="chapter-states">
<title>Element states</title> <title>Element states</title>
<para> <para>
Once you have created a pipeline packed with elements, nothing will happen Once you have created a pipeline packed with elements, nothing will happen
right away. This is where the different states come into play. right away. This is where the different states come into play.
</para> </para>
<sect1 id="sec-states"> <sect1 id="section-states">
<title>The different element states</title> <title>The different element states</title>
<para> <para>
An element can be in one of the following four states: An element can be in one of the following four states:
@ -73,7 +73,7 @@
</sect1> </sect1>
<sect1 id="sec-states-null"> <sect1 id="section-states-null">
<title>The NULL state</title> <title>The NULL state</title>
<para> <para>
When you created the pipeline all of the elements will be in the NULL state. There is When you created the pipeline all of the elements will be in the NULL state. There is
@ -87,7 +87,7 @@
</note> </note>
</sect1> </sect1>
<sect1 id="sec-states-ready"> <sect1 id="section-states-ready">
<title>The READY state</title> <title>The READY state</title>
<para> <para>
You will start the pipeline by first setting it to the READY state. This will allow the You will start the pipeline by first setting it to the READY state. This will allow the
@ -108,7 +108,7 @@
</note> </note>
</sect1> </sect1>
<sect1 id="sec-states-paused"> <sect1 id="section-states-paused">
<title>The PAUSED state</title> <title>The PAUSED state</title>
<para> <para>
A pipeline that is playing can be set to the PAUSED state. This will temporarily stop all A pipeline that is playing can be set to the PAUSED state. This will temporarily stop all
@ -126,10 +126,10 @@
</note> </note>
<para> <para>
The pipeline has to be in the PAUSED or NULL state if you want to insert or modify an element The pipeline has to be in the PAUSED or NULL state if you want to insert or modify an element
in the pipeline. We will cover dynamic pipeline behaviour in <xref linkend="cha-dynamic"/>. in the pipeline. We will cover dynamic pipeline behaviour in <xref linkend="chapter-dynamic"/>.
</para> </para>
</sect1> </sect1>
<sect1 id="sec-states-playing"> <sect1 id="section-states-playing">
<title>The PLAYING state</title> <title>The PLAYING state</title>
<para> <para>
A Pipeline that is in the READY state can be started by setting it to the PLAYING state. At A Pipeline that is in the READY state can be started by setting it to the PLAYING state. At

12
docs/manual/threads.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-threads"> <chapter id="chapter-threads">
<title>Threads</title> <title>Threads</title>
<para> <para>
GStreamer has support for multithreading through the use of GStreamer has support for multithreading through the use of
@ -37,7 +37,7 @@
itself. You never need to explicitly iterate a thread. itself. You never need to explicitly iterate a thread.
</para> </para>
<sect1> <sect1 id="section-threads-constraints">
<title>Constraints placed on the pipeline by the GstThread</title> <title>Constraints placed on the pipeline by the GstThread</title>
<para> <para>
Within the pipeline, everything is the same as in any other bin. The Within the pipeline, everything is the same as in any other bin. The
@ -46,13 +46,13 @@
fundamentally buffer-oriented rather than byte-oriented, the natural fundamentally buffer-oriented rather than byte-oriented, the natural
solution to this problem is an element that can "buffer" the buffers solution to this problem is an element that can "buffer" the buffers
between the threads, in a thread-safe fashion. This element is the between the threads, in a thread-safe fashion. This element is the
queue, described more fully in <xref linkend="cha-queues"/>. It doesn't queue, described more fully in <xref linkend="chapter-queues"/>. It doesn't
matter if the queue is placed in the containing bin or in the thread matter if the queue is placed in the containing bin or in the thread
itself, but it needs to be present on one side or the other to enable itself, but it needs to be present on one side or the other to enable
inter-thread communication. inter-thread communication.
</para> </para>
</sect1> </sect1>
<sect1> <sect1 id="section-threads-when">
<title>When would you want to use a thread?</title> <title>When would you want to use a thread?</title>
<para> <para>
If you are writing a GUI application, making the top-level bin a thread will make your GUI If you are writing a GUI application, making the top-level bin a thread will make your GUI
@ -63,9 +63,9 @@
an audio pipeline. an audio pipeline.
</para> </para>
<para> <para>
<xref linkend="sec-threads-img"/> shows how a thread can be visualised. <xref linkend="section-threads-img"/> shows how a thread can be visualised.
</para> </para>
<figure float="1" id="sec-threads-img"> <figure float="1" id="section-threads-img">
<title>A thread</title> <title>A thread</title>
<mediaobject> <mediaobject>
<imageobject> <imageobject>

2
docs/manual/typedetection.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-typedetection"> <chapter id="chapter-typedetection">
<title>Type Detection</title> <title>Type Detection</title>
<para> <para>
Sometimes the capabilities of a pad are not specificied. The filesrc Sometimes the capabilities of a pad are not specificied. The filesrc

8
docs/manual/xml.xml
View file

@ -1,4 +1,4 @@
<chapter id="cha-xml"> <chapter id="chapter-xml">
<title>XML in <application>GStreamer</application></title> <title>XML in <application>GStreamer</application></title>
<para> <para>
<application>GStreamer</application> uses XML to store and load <application>GStreamer</application> uses XML to store and load
@ -13,7 +13,7 @@
XML file again for later use. XML file again for later use.
</para> </para>
<sect1 id="sec-xml-write"> <sect1 id="section-xml-write">
<title>Turning GstElements into XML</title> <title>Turning GstElements into XML</title>
<para> <para>
@ -108,7 +108,7 @@ main (int argc, char *argv[])
</para> </para>
</sect1> </sect1>
<sect1 id="sec-xml-load"> <sect1 id="section-xml-load">
<title>Loading a GstElement from an XML file</title> <title>Loading a GstElement from an XML file</title>
<para> <para>
Before an XML file can be loaded, you must create a GstXML object. Before an XML file can be loaded, you must create a GstXML object.
@ -162,7 +162,7 @@ main(int argc, char *argv[])
success or failure of the requested action. success or failure of the requested action.
</para> </para>
</sect1> </sect1>
<sect1 id="sec-xml-custom"> <sect1 id="section-xml-custom">
<title>Adding custom XML tags into the core XML data</title> <title>Adding custom XML tags into the core XML data</title>
<para> <para>