From c1f0f03b5780a1dd233b118cbb71af8dd32e4446 Mon Sep 17 00:00:00 2001 From: diego Date: Tue, 3 Aug 2004 00:45:55 +0000 Subject: Moved to the TOOLS directory. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12941 b3059339-0415-0410-9bf9-f77b7e298cf2 --- TOOLS/TVout/fbset/fb.modes.5 | 228 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) create mode 100644 TOOLS/TVout/fbset/fb.modes.5 (limited to 'TOOLS/TVout/fbset/fb.modes.5') diff --git a/TOOLS/TVout/fbset/fb.modes.5 b/TOOLS/TVout/fbset/fb.modes.5 new file mode 100644 index 0000000000..0918f08f5d --- /dev/null +++ b/TOOLS/TVout/fbset/fb.modes.5 @@ -0,0 +1,228 @@ +.TH fb.modes 8 "Aug 1996" local "Linux frame buffer utils" +.SH NAME +fb.modes \- frame buffer modes file +.SH DESCRIPTION +.I /etc/fb.modes +contains an unlimited number of video mode descriptions. The general format +of a video mode is: +.sp +mode +.RI \" name \" +.RS +geometry +.RI < xres > +.RI < yres > +.RI < vxres > +.RI < vyres > +.RI < depth > +.br +timings +.RI < pixclock > +.RI < left > +.RI < right > +.RI < upper > +.RI < lower > +.RI < hslen > +.RI < vslen > +.br +.B options +.RI < value > +.RE +endmode +.SH OPTIONS +geometry options: +.RS +.TP +.I xres +visible horizontal resolution (in pixels) +.TP +.I yres +visible vertical resolution (in pixels) +.TP +.I vxres +virtual horizontal resolution (in pixels) +.TP +.I vyres +virtual vertical resolution (in pixels) +.TP +.I depth +display depth (in bits per pixel) +.RE +.PP +timing options: +.RS +.TP +.I pixclock +length of one pixel (in picoseconds) +.TP +.I left +left margin (in pixels) +.TP +.I right +right margin (in pixels) +.TP +.I upper +upper margin (in pixel lines) +.TP +.I lower +lower margin (in pixel lines) +.TP +.I hslen +horizontal sync length (in pixels) +.TP +.I vslen +vertical sync length (in pixel lines) +.RE +.PP +other options: +.RS +the first value of this options is the default +.TP +.IR \fBhsync "\ {" low | high } +the horizontal sync polarity +.TP +.IR \fBvsync "\ {" low | high } +the vertical sync polarity +.TP +.IR \fBcsync "\ {" low | high } +the composite sync polarity +.TP +.IR \fBextsync "\ {" false | true } +enable or disable external resync. If enabled the sync timings are not +generated by the frame buffer device and must be provided externally +instead. Note that this option may not be supported by every frame buffer +device +.TP +.IR \fBlaced "\ {" false | true } +enable or disable interlace. If enabled the display will be split in two +frames, each frame contains only even and odd lines respectively. These two +frames will be displayed alternating, this way twice the lines can be +displayed and the vertical frequency for monitor stays the same, but the +visible vertical frequency gets halved +.TP +.IR \fBdouble "\ {" false | true } +enable or disable doublescan. If enabled every line will be displayed twice +and this way the horizontal frequency can easily be doubled, so that the +same resolution can be displayed on different monitors, even if the +horizontal frequency specification differs. Note that this option may not be +supported by every frame buffer device +.RE +.SH INTERNALS +Generally a frame buffer display is organized as follows: +.sp +.ad c ++\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-+\-\-\-+ +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " ^ "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " | "\ " \fI5 "\ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " v "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br ++\-\-\-#################\-\-\-+\-\-\-+ +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " ^ "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " | "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " | "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RI "| " 1 " # " \fB| " " 2 " # " 3 " | " 4 " |" +.br +.RB "|" "<\->" "#" "<\-\-\-\-\-\-+\-\-\-\-\-\->" "#" "<\->" "|" "<\->" "|" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " | "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " | "\ " \fI6 "\ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " | "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ #\ \ \ \ \ \ \ " v "\ \ \ \ \ \ \ #\ \ \ |\ \ \ |" +.br ++\-\-\-#################\-\-\-+\-\-\-+ +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " ^ "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " | "\ " \fI7 "\ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " v "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br ++\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-+\-\-\-+ +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " ^ "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " | "\ " \fI8 "\ \ \ \ \ |\ \ \ |\ \ \ |" +.br +.RB "|\ \ \ |\ \ \ \ \ \ \ " v "\ \ \ \ \ \ \ |\ \ \ |\ \ \ |" +.br ++\-\-\-+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-+\-\-\-+ +.sp +.ad n +.RS +.I 1 +\t left margin +.br +.I 2 +\t xres +.br +.I 3 +\t right margin +.br +.I 4 +\t horizontal sync len +.br +.I 5 +\t upper margin +.br +.I 6 +\t yres +.br +.I 7 +\t lower margin +.br +.I 8 +\t vertical sync len +.RE +.sp +The area bordered with `#' is the visible display area. Horizontal and +vertical frequencies can now easily be calculated, for this the sum of +horizontal or vertical values are important +.RS +.sp +htotal\ =\ left\ +\ xres\ +\ right\ +\ hslen +.br +vtotal\ =\ upper\ +\ yres\ +\ lower\ +\ vslen +.sp +.RE +The length of one line can now be calculated with pixclock +.RS +.sp +line\ =\ pixclock\ *\ htotal +.sp +.RE +and we have the horizontal frequency +.RS +.sp +hfreq\ =\ 1E12\ /\ line\ =\ 1E12\ /\ (pixclock\ *\ htotal) +.sp +.RE +To get the vertical frequency vtotal must eventually adjusted. If the +display is laced, vtotal must be halved or if the display is a doublescan +one, vtotal must be doubled. Now we can calculate the length of one frame +.RS +.sp +if\ (lace)\ \ \ vtotal\ /=\ 2 +.br +if\ (double)\ vtotal\ *=\ 2 +.sp +frame\ =\ vtotal\ *\ line +.sp +.RE +and we get also the vertical frequency +.RS +.sp +vfreq\ =\ 1E12\ /\ frame\ =\ hfreq\ /\ vtotal +.sp +.RE +.SH SEE ALSO +.BR fbset "(8), " fbdev (4) -- cgit v1.2.3