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<html>
<head>
<title>Camstream: CamStream API documentation</title>
<link rel="stylesheet" href="../../tech.css" type="text/css">
</head>
<body>
<!-- Generated by Doxygen 1.2.6 -->
<center>
<a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> </center>
<hr><h1>CVideoDeviceInput Class Reference</h1><code>#include <<a class="el" href="videodeviceinput_h-source.html">VideoDeviceInput.h</a>></code>
<p>
<p>Inheritance diagram for CVideoDeviceInput::
<p><center><img src="class_cvideodeviceinput.gif" usemap="#CVideoDeviceInput_map" border="0"></center>
<map name="CVideoDeviceInput_map">
<area href="class_qobject.html" alt="QObject" shape="rect" coords="0,0,121,24">
</map>
<a href="class_cvideodeviceinput-members.html">List of all members.</a><h2>Public Types</h2>
<ul>
<li>enum { <a class="el" href="class_cvideodeviceinput.html#s11s0">Unknown</a>,
<a class="el" href="class_cvideodeviceinput.html#s11s1">TV</a>,
<a class="el" href="class_cvideodeviceinput.html#s11s2">Camera</a>
}
<li>enum { <br>
<a class="el" href="class_cvideodeviceinput.html#s12s3">PAL</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s4">NTSC</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s5">SECAM</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s6">PAL_NC</a>,
<br>
<a class="el" href="class_cvideodeviceinput.html#s12s7">PAL_M</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s8">PAL_N</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s9">NTSC_JAPAN</a>,
<a class="el" href="class_cvideodeviceinput.html#s12s10">MAX</a>
<br>
}
</ul>
<h2>Public Methods</h2>
<ul>
<li><a class="el" href="class_cvideodeviceinput.html#a0">CVideoDeviceInput</a> (<a class="el" href="class_cvideodevice.html">CVideoDevice</a> *video, int channel)
<li>int <a class="el" href="class_cvideodeviceinput.html#a1">GetNumber</a> () const
<li>QString <a class="el" href="class_cvideodeviceinput.html#a2">GetName</a> () const
<li>bool <a class="el" href="class_cvideodeviceinput.html#a3">HasAudio</a> () const
<li>int <a class="el" href="class_cvideodeviceinput.html#a4">GetType</a> () const
<li>int <a class="el" href="class_cvideodeviceinput.html#a5">GetTuners</a> () const
<li>int <a class="el" href="class_cvideodeviceinput.html#a6">GetCurrentTuner</a> () const
<li><a class="el" href="class_cvideodevicetuner.html">CVideoDeviceTuner</a>* <a class="el" href="class_cvideodeviceinput.html#a7">GetTuner</a> (int number) const
<li>bool <a class="el" href="class_cvideodeviceinput.html#a8">SelectTuner</a> (int number)
<li>void <a class="el" href="class_cvideodeviceinput.html#a9">SetNorm</a> (int norm)
<li>bool <a class="el" href="class_cvideodeviceinput.html#a10">Select</a> ()
</ul>
<h2>Public Attributes</h2>
<ul>
<li>enum CVideoDeviceInput:: { ... } <a class="el" href="class_cvideodeviceinput.html#m0">InputTypes</a>
<li>enum CVideoDeviceInput:: { ... } <a class="el" href="class_cvideodeviceinput.html#m1">TunerNorms</a>
</ul>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Every video device has one or more inputs (called channels in the Video4Linux API). Each input refers to one of the physical inputs on the card/chip, like Tuner, Composite, S-video, etc. This class represents such an input.
<p>
In addition, each input can have 0 or more tuners attached to it (to keep matters simple...). A tuner does the actual frequency setting, and is represented by a <a class="el" href="class_cvideodevicetuner.html">CVideoDeviceTuner</a> class.
<p>
There are three basic TV systems on this planet: PAL, NTSC and SECAM. There are also small variations in these systems, called <em>norms</em>. There are norms like PAL-B, -D, -G, -H, -I, M, -N, -MC; NTSC has two versions, `plain' NTSC (as used in the USA) and NTSC-Japan. SECAM seems to have only one norm. In practice, these norms are all the same when viewing a broadcast; as far as I know the main difference lies in the assignment of the hidden line numbers to services like TeleText, Closed Captioning, etc.
<p>
The Video4Linux API unfortunately has two different places where you set norm and system. You set the norm with the channel, and the system within the tuner. Within the BTTV driver, these are mixed up: norm = system. The VIDIOCSCHAN call allows you to set NTSC-JAPAN, for example, yet VIDIOCSTUNER limits it to PAL, NTSC and SECAM only. For this reason the norm selection has been incorporated into this class.
<p>
<hr><h2>Member Enumeration Documentation</h2>
<a name="s11" doxytag="CVideoDeviceInput::@8"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
anonymous enum
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Enumeration values:</b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><a name="s11s0" doxytag="Unknown"></a><em>Unknown</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s11s1" doxytag="TV"></a><em>TV</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s11s2" doxytag="Camera"></a><em>Camera</em>
</td><td>
</td></tr>
</table>
</dl>
</td>
</tr>
</table>
<a name="s12" doxytag="CVideoDeviceInput::@9"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
anonymous enum
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Enumeration values:</b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><a name="s12s3" doxytag="PAL"></a><em>PAL</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s4" doxytag="NTSC"></a><em>NTSC</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s5" doxytag="SECAM"></a><em>SECAM</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s6" doxytag="PAL_NC"></a><em>PAL_NC</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s7" doxytag="PAL_M"></a><em>PAL_M</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s8" doxytag="PAL_N"></a><em>PAL_N</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s9" doxytag="NTSC_JAPAN"></a><em>NTSC_JAPAN</em>
</td><td>
</td></tr>
<tr><td valign=top><a name="s12s10" doxytag="MAX"></a><em>MAX</em>
</td><td>
</td></tr>
</table>
</dl>
</td>
</tr>
</table>
<hr><h2>Constructor & Destructor Documentation</h2>
<a name="a0" doxytag="CVideoDeviceInput::CVideoDeviceInput"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
CVideoDeviceInput::CVideoDeviceInput (
</b></td>
<td valign="bottom"><b>
<a class="el" href="class_cvideodevice.html">CVideoDevice</a> * <em>video</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>channel</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Constructor.
<p>
<p>
In the constructor the channel information is queried and stored. It will also create any Tuner objects that may be needed. </td>
</tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a name="a6" doxytag="CVideoDeviceInput::GetCurrentTuner"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int CVideoDeviceInput::GetCurrentTuner (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return current tuner number.
<p>
<dl compact><dt>
<b>Returns: </b><dd>
Tuner number, or -1 if the current tuner is unknown
<p>
</dl>Since there is no way to query the current selected tuner from the device, this function returns -1 until a tuner has been selected. </td>
</tr>
</table>
<a name="a2" doxytag="CVideoDeviceInput::GetName"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
QString CVideoDeviceInput::GetName (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return symbolic name for input.
<p>
</td>
</tr>
</table>
<a name="a1" doxytag="CVideoDeviceInput::GetNumber"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int CVideoDeviceInput::GetNumber (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return channel number.
<p>
</td>
</tr>
</table>
<a name="a7" doxytag="CVideoDeviceInput::GetTuner"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
<a class="el" href="class_cvideodevicetuner.html">CVideoDeviceTuner</a> * CVideoDeviceInput::GetTuner (
</b></td>
<td valign="bottom"><b>
int <em>number</em> ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a name="a5" doxytag="CVideoDeviceInput::GetTuners"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int CVideoDeviceInput::GetTuners (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return number of tuners.
<p>
<p>
Most inputs don't have a tuner, or at most 1. Multiple tuners could be used for multi-norm cards (each norm having a separate tuner), but this hasn't happend sofar. </td>
</tr>
</table>
<a name="a4" doxytag="CVideoDeviceInput::GetType"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int CVideoDeviceInput::GetType (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return type for this input.
<p>
<p>
Returns a value from the <a class="el" href="class_cvideodeviceinput.html#m0">InputTypes</a> enum, either TV or Camera </td>
</tr>
</table>
<a name="a3" doxytag="CVideoDeviceInput::HasAudio"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
bool CVideoDeviceInput::HasAudio (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Returns whether this input has an audio channel associated with it.
<p>
</td>
</tr>
</table>
<a name="a10" doxytag="CVideoDeviceInput::Select"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
bool CVideoDeviceInput::Select (
</b></td>
<td valign="bottom"><b>
)
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Make this input the current one.
<p>
<p>
</td>
</tr>
</table>
<a name="a8" doxytag="CVideoDeviceInput::SelectTuner"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
bool CVideoDeviceInput::SelectTuner (
</b></td>
<td valign="bottom"><b>
int <em>number</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a name="a9" doxytag="CVideoDeviceInput::SetNorm"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void CVideoDeviceInput::SetNorm (
</b></td>
<td valign="bottom"><b>
int <em>norm</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<hr><h2>Member Data Documentation</h2>
<a name="m0" doxytag="CVideoDeviceInput::InputTypes"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
enum { ... } CVideoDeviceInput::InputTypes
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a name="m1" doxytag="CVideoDeviceInput::TunerNorms"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
enum { ... } CVideoDeviceInput::TunerNorms
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="videodeviceinput_cc.html">VideoDeviceInput.cc</a><li><a class="el" href="videodeviceinput_h-source.html">VideoDeviceInput.h</a></ul>
<hr><address><small>Generated at Wed Jun 20 02:51:26 2001 for Camstream by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.gif" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.6 written by <a href="mailto:dimitri@stack.nl">Dimitri van Heesch</a>,
© 1997-2001</small></address>
</body>
</html>
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