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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Chapter 10. DVB Demux Device</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="LINUX MEDIA INFRASTRUCTURE API" /><link rel="up" href="dvbapi.html" title="Part II. LINUX DVB API" /><link rel="prev" href="FE_GET_SET_PROPERTY.html" title="FE_GET_PROPERTY/FE_SET_PROPERTY" /><link rel="next" href="dmx_fcalls.html" title="Demux Function Calls" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 10. DVB Demux Device</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="FE_GET_SET_PROPERTY.html">Prev</a> </td><th width="60%" align="center">Part II. LINUX DVB API</th><td width="20%" align="right"> <a accesskey="n" href="dmx_fcalls.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="dvb_demux"></a>Chapter 10. DVB Demux Device</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="section"><a href="dvb_demux.html#dmx_types">Demux Data Types</a></span></dt><dd><dl><dt><span class="section"><a href="dvb_demux.html#dmx-output-t">dmx_output_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-input-t">dmx_input_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-pes-type-t">dmx_pes_type_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-filter">struct dmx_filter</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-sct-filter-params">struct dmx_sct_filter_params</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-pes-filter-params">struct dmx_pes_filter_params</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-event">struct dmx_event</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-stc">struct dmx_stc</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-caps">struct dmx_caps</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-source-t">enum dmx_source_t</a></span></dt></dl></dd><dt><span class="section"><a href="dmx_fcalls.html">Demux Function Calls</a></span></dt><dd><dl><dt><span class="section"><a href="dmx_fcalls.html#dmx_fopen">open()</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#dmx_fclose">close()</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#dmx_fread">read()</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#dmx_fwrite">write()</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_START">DMX_START</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_STOP">DMX_STOP</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_SET_FILTER">DMX_SET_FILTER</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_SET_PES_FILTER">DMX_SET_PES_FILTER</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_SET_BUFFER_SIZE">DMX_SET_BUFFER_SIZE</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_GET_EVENT">DMX_GET_EVENT</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_GET_STC">DMX_GET_STC</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_GET_PES_PIDS">DMX_GET_PES_PIDS</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_GET_CAPS">DMX_GET_CAPS</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_SET_SOURCE">DMX_SET_SOURCE</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_ADD_PID">DMX_ADD_PID</a></span></dt><dt><span class="section"><a href="dmx_fcalls.html#DMX_REMOVE_PID">DMX_REMOVE_PID</a></span></dt></dl></dd></dl></div><p>The DVB demux device controls the filters of the DVB hardware/software. It can be
accessed through <span class="tt">/dev/adapter0/demux0</span>. Data types and and ioctl definitions can be
accessed by including <span class="tt">linux/dvb/dmx.h</span> in your application.
</p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="dmx_types"></a>Demux Data Types</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="dvb_demux.html#dmx-output-t">dmx_output_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-input-t">dmx_input_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-pes-type-t">dmx_pes_type_t</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-filter">struct dmx_filter</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-sct-filter-params">struct dmx_sct_filter_params</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-pes-filter-params">struct dmx_pes_filter_params</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-event">struct dmx_event</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-stc">struct dmx_stc</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-caps">struct dmx_caps</a></span></dt><dt><span class="section"><a href="dvb_demux.html#dmx-source-t">enum dmx_source_t</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-output-t"></a>dmx_output_t</h3></div></div></div><pre class="programlisting">
typedef enum
{
DMX_OUT_DECODER, /⋆ Streaming directly to decoder. ⋆/
DMX_OUT_TAP, /⋆ Output going to a memory buffer ⋆/
/⋆ (to be retrieved via the read command).⋆/
DMX_OUT_TS_TAP, /⋆ Output multiplexed into a new TS ⋆/
/⋆ (to be retrieved by reading from the ⋆/
/⋆ logical DVR device). ⋆/
DMX_OUT_TSDEMUX_TAP /⋆ Like TS_TAP but retrieved from the DMX device ⋆/
} dmx_output_t;
</pre><p><span class="tt">DMX_OUT_TAP</span> delivers the stream output to the demux device on which the ioctl is
called.
</p><p><span class="tt">DMX_OUT_TS_TAP</span> routes output to the logical DVR device <span class="tt">/dev/dvb/adapter0/dvr0</span>,
which delivers a TS multiplexed from all filters for which <span class="tt">DMX_OUT_TS_TAP</span> was
specified.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-input-t"></a>dmx_input_t</h3></div></div></div><pre class="programlisting">
typedef enum
{
DMX_IN_FRONTEND, /⋆ Input from a front-end device. ⋆/
DMX_IN_DVR /⋆ Input from the logical DVR device. ⋆/
} dmx_input_t;
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-pes-type-t"></a>dmx_pes_type_t</h3></div></div></div><pre class="programlisting">
typedef enum
{
DMX_PES_AUDIO0,
DMX_PES_VIDEO0,
DMX_PES_TELETEXT0,
DMX_PES_SUBTITLE0,
DMX_PES_PCR0,
DMX_PES_AUDIO1,
DMX_PES_VIDEO1,
DMX_PES_TELETEXT1,
DMX_PES_SUBTITLE1,
DMX_PES_PCR1,
DMX_PES_AUDIO2,
DMX_PES_VIDEO2,
DMX_PES_TELETEXT2,
DMX_PES_SUBTITLE2,
DMX_PES_PCR2,
DMX_PES_AUDIO3,
DMX_PES_VIDEO3,
DMX_PES_TELETEXT3,
DMX_PES_SUBTITLE3,
DMX_PES_PCR3,
DMX_PES_OTHER
} dmx_pes_type_t;
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-filter"></a>struct dmx_filter</h3></div></div></div><pre class="programlisting">
typedef struct dmx_filter
{
__u8 filter[DMX_FILTER_SIZE];
__u8 mask[DMX_FILTER_SIZE];
__u8 mode[DMX_FILTER_SIZE];
} dmx_filter_t;
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-sct-filter-params"></a>struct dmx_sct_filter_params</h3></div></div></div><pre class="programlisting">
struct dmx_sct_filter_params
{
__u16 pid;
dmx_filter_t filter;
__u32 timeout;
__u32 flags;
#define DMX_CHECK_CRC 1
#define DMX_ONESHOT 2
#define DMX_IMMEDIATE_START 4
#define DMX_KERNEL_CLIENT 0x8000
};
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-pes-filter-params"></a>struct dmx_pes_filter_params</h3></div></div></div><pre class="programlisting">
struct dmx_pes_filter_params
{
__u16 pid;
dmx_input_t input;
dmx_output_t output;
dmx_pes_type_t pes_type;
__u32 flags;
};
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-event"></a>struct dmx_event</h3></div></div></div><pre class="programlisting">
struct dmx_event
{
dmx_event_t event;
time_t timeStamp;
union
{
dmx_scrambling_status_t scrambling;
} u;
};
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-stc"></a>struct dmx_stc</h3></div></div></div><pre class="programlisting">
struct dmx_stc {
unsigned int num; /⋆ input : which STC? 0..N ⋆/
unsigned int base; /⋆ output: divisor for stc to get 90 kHz clock ⋆/
__u64 stc; /⋆ output: stc in 'base'⋆90 kHz units ⋆/
};
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-caps"></a>struct dmx_caps</h3></div></div></div><pre class="programlisting">
typedef struct dmx_caps {
__u32 caps;
int num_decoders;
} dmx_caps_t;
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="dmx-source-t"></a>enum dmx_source_t</h3></div></div></div><pre class="programlisting">
typedef enum {
DMX_SOURCE_FRONT0 = 0,
DMX_SOURCE_FRONT1,
DMX_SOURCE_FRONT2,
DMX_SOURCE_FRONT3,
DMX_SOURCE_DVR0 = 16,
DMX_SOURCE_DVR1,
DMX_SOURCE_DVR2,
DMX_SOURCE_DVR3
} dmx_source_t;
</pre></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="FE_GET_SET_PROPERTY.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="dvbapi.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="dmx_fcalls.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><code class="constant">FE_GET_PROPERTY/FE_SET_PROPERTY</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Demux Function Calls</td></tr></table></div></body></html>
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