mirror of https://github.com/mpv-player/mpv
'vesa' vo driver added. By Nick Kurshev. (spellchecked, fixed, mplayerdoxized)
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2449 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -81,6 +81,7 @@
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<LI><A HREF="video.html#2.2.1.9">2.2.1.9 3dfx YUV support (tdfxfb)</A></LI>
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<LI><A HREF="video.html#2.2.1.10">2.2.1.10 OpenGL output</A></LI>
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<LI><A HREF="video.html#2.2.1.11">2.2.1.11 AAlib - text mode displaying</A></LI>
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<LI><A HREF="video.html#2.2.1.12">2.2.1.12 VESA - output to VESA BIOS</A></LI>
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<LI><A HREF="video.html#2.2.1.A">2.2.1.A TVout</A></LI>
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<UL>
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<LI><A HREF="video.html#2.2.1.A.1">2.2.1.A.1 Matrox cards</A></LI>
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115
DOCS/video.html
115
DOCS/video.html
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@ -24,6 +24,7 @@
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<CODE>1.2.0:</CODE> supports AAlib (-vo aa is very recommended, see below!)</TD><TR>
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<TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>ggi</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>similar to SDL</TD><TR>
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<TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>aa</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>textmode rendering with AAlib</TD><TR>
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<TD></TD><TD VALIGN=top><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2><a href="video.html#2.2.1.12">vesa</a></TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>Output to VESA BIOS.</TD><TR>
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<TD COLSPAN=4><P><B><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>Card specific:</B></P></TD><TR>
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@ -194,7 +195,7 @@ Complain to NVidia.</UL></P>
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disabling VSYNC somehow, or set refresh rate to n*(fps of the movie) Hz.</LI>
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<LI>Radeon VE - currently only XFree86 CVS has driver for this card, version
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4.1.0 doesn't. No TV-out support.</LI>
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4.1.0 doesn't. No TV-out support. (But see <a href="video.html#2.2.1.12">VESA</a> sections).</LI>
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</P>
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@ -263,7 +264,7 @@ the movie fits in. There is no converter right now.. :(</P>
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If you want to run it as user, then install <B>MPlayer</B> SUID root:</P>
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<P><CODE>
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<CODE>chown root /usr/local/bin/mplayer<BR>
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chown root /usr/local/bin/mplayer<BR>
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chmod 750 /usr/local/bin/mplayer<BR>
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chmod +s /usr/local/bin/mplayer</CODE></P>
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@ -617,6 +618,90 @@ curses (-aadriver linux). But therefore you need write access on /dev/vcsa<te
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That isn't autodetected by aalib, bu vo_aa tries to find the best mode.
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See <A HREF="http://aa-project.sourceforge.net/tune/">http://aa-project.sourceforge.net/tune/</A> for further tuning issues.</P>
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<P><B><A NAME=2.2.1.12>2.2.1.12. VESA - output to VESA BIOS</B></P>
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<P>
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This driver was designed and introduced as <b>generic driver</b> for any video
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card which has VESA VBE 2.0 compatible BIOS. But exists still one reason of
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developing of this driver - it's multiple troubles with displaying movie on TV.<BR>
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<b>VESA BIOS EXTENSION (VBE) Version 3.0 Date: September 16, 1998</b> (Page 70)
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says:
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</P>
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<P>
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<code><i>
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<b>Dual-Controller Designs</b><br>
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VBE 3.0 supports the dual-controller design by assuming that since both
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controllers are typically provided by the same OEM, under control of a
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single BIOS ROM on the same graphics card, it is possible to hide the fact
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that two controllers are indeed present from the application. This has the
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limitation of preventing simultaneous use of the independent controllers,
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but allows applications released before VBE 3.0 to operate normally. The
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VBE Function 00h (Return Controller Information) returns the combined
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information of both controllers, including the combined list of available modes.
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When the application selects a mode, the appropriate controller is activated.
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Each of the remaining VBE functions then operates on the active controller.
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</i></code>
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</P>
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<P>
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So you have chances to get working tv-out by using this driver.
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<br>(I guess that TV-out frequently is standalone head or standalone output
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at least.)
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</P>
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<P>
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<b>What are pluses:</b><BR>
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- You have chances to watch movies <b>if Linux even doesn't know</b> your video hardware.<BR>
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- You don't need to have installed any graphics' related things on your Linux
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(like X11 (aka XFree86), fbdev and so on). This driver can be run from
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<b>text-mode</b>.<BR>
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- You have chances to get <b>working TV-out</b>. (It's known at least for ATI's cards).<BR>
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- This driver calls <b>int 10h</b> handler thus it's not an emulator - it
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calls <b>real</b> things of <b>real</b> BIOS in <b>real</b>-mode. (Finely -
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in vm86 mode).<BR>
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- Most important :) You can watch <b>DVD at 320x200</b> if you don't have a powerful CPU.<BR>
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</P>
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<P>
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<b>What are minuses:</b><BR>
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- It works only on <b>x86 systems</b>.<BR>
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- <b>It's the slowest driver</b> from all the available ones for MPlayer.<BR>
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- It can be used only by <b>ROOT</b>.<BR>
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- Currently it's available only for <b>Linux</b>.<BR>
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- It <b>doesn't use</b> any <b>hardware accelerations</b> (like YUV overlay or hw scaling).<BR>
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</P>
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<P>
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<TABLE BORDER=0>
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<TD COLSPAN=4><P><B><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>These switches of command line currently are available for VESA:</B></P></TD><TR>
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<TD> </TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-vo vesa:opts</TD><TD> </TD><TD>
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<FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>will be implemented soon. (Will specify mode parameters such as refresh rate, interlacing, doublescan and so on. Samples: i43, 85, d100)</TD><TR>
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<TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-screenw, -screenh, -bpp</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>force userdefined mode</TD><TR>
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<TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-x, -y</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>set userdefined prescaling</TD><TR>
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<TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-zoom</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>enables userdefined prescaling</TD><TR>
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<TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-fs</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>scales image to fullscreen</TD><TR>
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<TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>-fs -zoom</TD><TD></TD><TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>scales userdefined prescaling to fullscreen</TD><TR>
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</TABLE>
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</P>
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<P>
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<b>Known problems and workaround:</b><br>
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- If you have installed <b>NLS</b> font on your Linux box and run VESA driver
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from text-mode then after terminating mplayer you will have <b>ROM font</b> loaded instead
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of national. You can load national font again by using <b><i>setsysfont</i></b> utility
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from for example Mandrake distribution.<br>
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(<b>Hint</b>: The same utility is used for localizating fbdev).<br>
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- Some <b>Linux graphics drivers</b> don't update active <b>BIOS mode</b> in DOS memory. So if you have such
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problem - always use VESA driver only from <b>text-mode</b>. Otherwise text-mode (#03) will be
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activated anyway and you will need restart your computer.<br>
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- Often after terminating VESA driver you get <b>black screen</b>. To return your screen
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to original state - simply switch to other console (by pressing <b>Alt-Fx</b>) then switch
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to your previous console by the same way.<br>
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- To get <b>working TV-out</b> you need have plugged tv-connector in before booting
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your PC since video BIOS initializes itself only once during POST procedure.
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</P>
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<P><B><A NAME=2.2.1.A>2.2.1.A. TV-out support</A></B></P>
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<P><B><A NAME=2.2.1.A.1>2.2.1.A.1. Matrox cards</A></B></P>
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@ -762,13 +847,29 @@ we have no chance to get working TV-out on ATI.</P>
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<LI><b>Radeon VE</b> and <b>Rage PRO LT</b> have <i>ImpacTV2+</i> which is not supported under Linux.</P>
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<P>
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From other side - we could have a chance to have TV-out support through
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<b>VESA drivers</b> on x86 systems but since Linux has too limited <i>vm86 syscall</i>
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- it's unreachable on practice. Finely every access to IO space causes exception
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and driver attempts to emulate even VESA calls instead passing them to native
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int_10h handler.
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Fortunately, owners of fast enough CPUs (Duron, Celeron2 and better) <b>can watch
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movies on their TV</b> through <a href="video.html#2.2.1.12">VESA drivers</a>.
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</P>
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<P>
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I should say good words into address of ATI Inc. too:<br>
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<b>it produces top quality BIOSes.</b>
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</P>
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<P>
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<b>VESA drivers</b> don't use any hardware acceleration but it simulates
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<b>DGA</b> through 64K window, which is configured through 32-bit mode
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functions of BIOS. ATI cards have enough <b>fast video memory</b> (DIMM or DDR
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chips with 64 - 128-bit access) so it's not bottleneck for them. There are no
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limitations on which video mode can be displayed on your TV (like on other
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cards) so you can use <b>any video mode</b> on your <b>TV</b> (from
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<b>320x200</b> up to <b>1024x768</b>). <br>Only thing you need to do - <b>have
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plugged tv-connector in before booting your PC</b> since video BIOS initializes
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itself only once during POST procedure.
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</P>
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<P>
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For detail see <a href="video.html#2.2.1.12">VESA</a> sections of this documentation.
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</P>
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</BODY>
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