<title>DVB Audio Device</title>
<para>The DVB audio device controls the MPEG2 audio decoder of the DVB hardware. It
-can be accessed through <emphasis role="tt">/dev/dvb/adapter0/audio0</emphasis>. Data types and and
-ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/audio.h</emphasis> in your
+can be accessed through <emphasis role="bold">/dev/dvb/adapter0/audio0</emphasis>. Data types and and
+ioctl definitions can be accessed by including <emphasis role="bold">linux/dvb/audio.h</emphasis> in your
application.
</para>
<para>Please note that some DVB cards don’t have their own MPEG decoder, which results in
</programlisting>
<para>AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
DVR device) as the source of the video stream. If AUDIO_SOURCE_MEMORY
-is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
+is selected the stream comes from the application through the <emphasis role="bold">write()</emphasis> system
call.
</para>
<title>DVB CA Device</title>
<para>The DVB CA device controls the conditional access hardware. It can be accessed through
-<emphasis role="tt">/dev/dvb/adapter0/ca0</emphasis>. Data types and and ioctl definitions can be accessed by
-including <emphasis role="tt">linux/dvb/ca.h</emphasis> in your application.
+<emphasis role="bold">/dev/dvb/adapter0/ca0</emphasis>. Data types and and ioctl definitions can be accessed by
+including <emphasis role="bold">linux/dvb/ca.h</emphasis> in your application.
</para>
<section id="ca_data_types">
<title>DVB Demux Device</title>
<para>The DVB demux device controls the filters of the DVB hardware/software. It can be
-accessed through <emphasis role="tt">/dev/adapter0/demux0</emphasis>. Data types and and ioctl definitions can be
-accessed by including <emphasis role="tt">linux/dvb/dmx.h</emphasis> in your application.
+accessed through <emphasis role="bold">/dev/adapter0/demux0</emphasis>. Data types and and ioctl definitions can be
+accessed by including <emphasis role="bold">linux/dvb/dmx.h</emphasis> in your application.
</para>
<section id="dmx_types">
<title>Demux Data Types</title>
DMX_OUT_TSDEMUX_TAP /⋆ Like TS_TAP but retrieved from the DMX device ⋆/
} dmx_output_t;
</programlisting>
-<para><emphasis role="tt">DMX_OUT_TAP</emphasis> delivers the stream output to the demux device on which the ioctl is
+<para><emphasis role="bold">DMX_OUT_TAP</emphasis> delivers the stream output to the demux device on which the ioctl is
called.
</para>
-<para><emphasis role="tt">DMX_OUT_TS_TAP</emphasis> routes output to the logical DVR device <emphasis role="tt">/dev/dvb/adapter0/dvr0</emphasis>,
-which delivers a TS multiplexed from all filters for which <emphasis role="tt">DMX_OUT_TS_TAP</emphasis> was
+<para><emphasis role="bold">DMX_OUT_TS_TAP</emphasis> routes output to the logical DVR device <emphasis role="bold">/dev/dvb/adapter0/dvr0</emphasis>,
+which delivers a TS multiplexed from all filters for which <emphasis role="bold">DMX_OUT_TS_TAP</emphasis> was
specified.
</para>
</section>
<para>The DVB frontend device controls the tuner and DVB demodulator
hardware. It can be accessed through <emphasis
-role="tt">/dev/dvb/adapter0/frontend0</emphasis>. Data types and and
+role="bold">/dev/dvb/adapter0/frontend0</emphasis>. Data types and and
ioctl definitions can be accessed by including <emphasis
-role="tt">linux/dvb/frontend.h</emphasis> in your application.</para>
+role="bold">linux/dvb/frontend.h</emphasis> in your application.</para>
<para>DVB frontends come in three varieties: DVB-S (satellite), DVB-C
(cable) and DVB-T (terrestrial). Transmission via the internet (DVB-IP)
platform, if and how many of the CA functions are made available to the
application through this device.</para>
-<para>All devices can be found in the <emphasis role="tt">/dev</emphasis>
-tree under <emphasis role="tt">/dev/dvb</emphasis>. The individual devices
+<para>All devices can be found in the <emphasis role="bold">/dev</emphasis>
+tree under <emphasis role="bold">/dev/dvb</emphasis>. The individual devices
are called:</para>
<itemizedlist>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/audioM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/audioM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/videoM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/videoM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/frontendM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/frontendM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/netM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/netM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/demuxM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/demuxM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/dvrM</emphasis>,</para>
+<para><emphasis role="bold">/dev/dvb/adapterN/dvrM</emphasis>,</para>
</listitem>
<listitem>
-<para><emphasis role="tt">/dev/dvb/adapterN/caM</emphasis>,</para></listitem></itemizedlist>
+<para><emphasis role="bold">/dev/dvb/adapterN/caM</emphasis>,</para></listitem></itemizedlist>
<para>where N enumerates the DVB PCI cards in a system starting
from 0, and M enumerates the devices of each type within each
adapter, starting from 0, too. We will omit the “<emphasis
-role="tt">/dev/dvb/adapterN/</emphasis>” in the further dicussion
+role="bold">/dev/dvb/adapterN/</emphasis>” in the further dicussion
of these devices. The naming scheme for the devices is the same wheter
devfs is used or not.</para>
<para>To enable applications to support different API version, an
additional include file <emphasis
-role="tt">linux/dvb/version.h</emphasis> exists, which defines the
-constant <emphasis role="tt">DVB_API_VERSION</emphasis>. This document
-describes <emphasis role="tt">DVB_API_VERSION 5.8</emphasis>.
+role="bold">linux/dvb/version.h</emphasis> exists, which defines the
+constant <emphasis role="bold">DVB_API_VERSION</emphasis>. This document
+describes <emphasis role="bold">DVB_API_VERSION 5.8</emphasis>.
</para>
</section>
<title>Kernel Demux API</title>
<para>The kernel demux API defines a driver-internal interface for registering low-level,
hardware specific driver to a hardware independent demux layer. It is only of interest for
-DVB device driver writers. The header file for this API is named <emphasis role="tt">demux.h</emphasis> and located in
-<emphasis role="tt">drivers/media/dvb-core</emphasis>.
+DVB device driver writers. The header file for this API is named <emphasis role="bold">demux.h</emphasis> and located in
+<emphasis role="bold">drivers/media/dvb-core</emphasis>.
</para>
<para>Maintainer note: This section must be reviewed. It is probably out of date.
</para>
<title>DVB Network API</title>
<para>The DVB net device enables feeding of MPE (multi protocol encapsulation) packets
received via DVB into the Linux network protocol stack, e.g. for internet via satellite
-applications. It can be accessed through <emphasis role="tt">/dev/dvb/adapter0/net0</emphasis>. Data types and
-and ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/net.h</emphasis> in your
+applications. It can be accessed through <emphasis role="bold">/dev/dvb/adapter0/net0</emphasis>. Data types and
+and ioctl definitions can be accessed by including <emphasis role="bold">linux/dvb/net.h</emphasis> in your
application.
</para>
<section id="dvb_net_types">
<title>DVB Video Device</title>
<para>The DVB video device controls the MPEG2 video decoder of the DVB hardware. It
-can be accessed through <emphasis role="tt">/dev/dvb/adapter0/video0</emphasis>. Data types and and
-ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/video.h</emphasis> in your
+can be accessed through <emphasis role="bold">/dev/dvb/adapter0/video0</emphasis>. Data types and and
+ioctl definitions can be accessed by including <emphasis role="bold">linux/dvb/video.h</emphasis> in your
application.
</para>
<para>Note that the DVB video device only controls decoding of the MPEG video stream, not
its presentation on the TV or computer screen. On PCs this is typically handled by an
-associated video4linux device, e.g. <emphasis role="tt">/dev/video</emphasis>, which allows scaling and defining output
+associated video4linux device, e.g. <emphasis role="bold">/dev/video</emphasis>, which allows scaling and defining output
windows.
</para>
<para>Some DVB cards don’t have their own MPEG decoder, which results in the omission of
<section id="video-format-t">
<title>video_format_t</title>
-<para>The <emphasis role="tt">video_format_t</emphasis> data type defined by
+<para>The <emphasis role="bold">video_format_t</emphasis> data type defined by
</para>
<programlisting>
typedef enum {
</programlisting>
<para>VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
DVR device) as the source of the video stream. If VIDEO_SOURCE_MEMORY
-is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
+is selected the stream comes from the application through the <emphasis role="bold">write()</emphasis> system
call.
</para>
</section>
projects / platform / kernel / linux-rpi.git / commitdiff