mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
d483a015a2
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7473 b3059339-0415-0410-9bf9-f77b7e298cf2
278 lines
6.9 KiB
C
278 lines
6.9 KiB
C
/*
|
|
* subpic_encode.c - encodes a pixmap with RLE
|
|
*
|
|
* Copyright (C) 2000 Alejandro J. Cura <alecu@protocultura.net>
|
|
*
|
|
* (modified a bit to work with the dxr3 driver...4/2/2002 cg)
|
|
*
|
|
* Based on the hard work of:
|
|
*
|
|
* Samuel Hocevar <sam@via.ecp.fr> and Michel Lespinasse <walken@via.ecp.fr>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "unistd.h"
|
|
#include "spuenc.h"
|
|
|
|
static void
|
|
encode_do_control(int x,int y, encodedata* ed, pixbuf* pb) {
|
|
int controlstart= ed->count;
|
|
int x1;
|
|
int i;
|
|
unsigned int top, left, bottom, right;
|
|
|
|
top= 450 - pb->y/2;
|
|
left=(720 / 2) - (pb->x / 2);
|
|
top= 32;//this forces the first bit to be visible on a TV
|
|
left= 32;//you could actually pass in x/y and do some nice
|
|
//calculations for making it look right...
|
|
bottom= top + pb->y - 1;
|
|
right= left + pb->x - 1;
|
|
|
|
/* the format of this is well described by a page:
|
|
* http://members.aol.com/mpucoder/DVD/spu.html
|
|
*
|
|
* note I changed the layout of commands to turn off the subpic as the
|
|
* first command, and then turn on the new subpic...this is so we can
|
|
* leave the subpic on for an arbitrary ammount of time as controlled by
|
|
* mplayer (ie when we turn on the subpic we don't know how long it should
|
|
* stay on when using mplayer).
|
|
* with this layout we turn off the last subpic as we are turning on the
|
|
* new one.
|
|
* The original hd it turn on the subpic, and delay the turn off command using
|
|
* the durration/delay feature.
|
|
* */
|
|
/* start at x0+2*/
|
|
i= controlstart;
|
|
/* display duration... */
|
|
// ed->data[i++]= 0x00;
|
|
// ed->data[i++]= 0x00; //durration before turn off command occurs
|
|
//in 90000/1024 units
|
|
|
|
/* x1 */
|
|
// x1=i+4;
|
|
// ed->data[i++]= x1 >> 8;//location of next command block
|
|
// ed->data[i++]= x1 & 0xff;
|
|
/* finish it */
|
|
// ed->data[i++]= 0x02;//turn off command
|
|
// ed->data[i++]= 0xff;//end of command block
|
|
x1= i; //marker for last command block address
|
|
|
|
/* display duration... */
|
|
ed->data[i++]= 0x00;
|
|
ed->data[i++]= 0x00; //durration before turn on command occurs
|
|
//in 90000/1024 units
|
|
/* x1 */
|
|
ed->data[i++]= x1 >> 8; //since this is the last command block, this
|
|
ed->data[i++]= x1 & 0xff;//points back to itself
|
|
|
|
|
|
/* 0x01: start displaying */
|
|
ed->data[i++]= 0x01;
|
|
|
|
/* 0x03: palette info */
|
|
ed->data[i++]= 0x03;
|
|
ed->data[i++]= 0x08;
|
|
ed->data[i++]= 0x7f;
|
|
/*
|
|
* The palette is a coded index (one of 16) 0 is black, 0xf is white
|
|
* (unless you screw with the default palette)
|
|
* for what I am doing I only use white.
|
|
* 7 is lt grey, and 8 is dk grey...
|
|
* */
|
|
/* 0x04: transparency info (reversed) */
|
|
ed->data[i++]= 0x04;
|
|
ed->data[i++]= 0xFF;//change the opacity values of the color entries
|
|
ed->data[i++]= 0xF0;//say if you wanted white text on a black backround
|
|
//note you will have to work harder, by finding the
|
|
//bounding box of the text, and use a non transparent black palette
|
|
// entry to fill the backround with, (say color 1 instead of 0)
|
|
|
|
/* 0x05: coordinates */
|
|
ed->data[i++]= 0x05;
|
|
ed->data[i++]= left >> 4;
|
|
ed->data[i++]= ((left&0xf)<<4)+(right>>8);
|
|
ed->data[i++]= (right&0xff);
|
|
ed->data[i++]= top >> 4;
|
|
ed->data[i++]= ((top&0xf)<<4)+(bottom>>8);
|
|
ed->data[i++]= (bottom&0xff);
|
|
|
|
/* 0x06: both fields' offsets */
|
|
ed->data[i++]= 0x06;
|
|
ed->data[i++]= 0x00;
|
|
ed->data[i++]= 0x04;
|
|
ed->data[i++]= ed->oddstart >> 8;
|
|
ed->data[i++]= ed->oddstart & 0xff;
|
|
|
|
/* 0xFF: end sequence */
|
|
ed->data[i++]= 0xFF;
|
|
if(! i&1 ) {
|
|
ed->data[i++]= 0xff;
|
|
}
|
|
|
|
/* x0 */
|
|
ed->data[2]= (controlstart) >> 8;
|
|
ed->data[3]= (controlstart) & 0xff;
|
|
|
|
/* packet size */
|
|
ed->data[0]= i >> 8;
|
|
ed->data[1]= i & 0xff;
|
|
|
|
ed->count= i;
|
|
}
|
|
|
|
static void
|
|
encode_put_nibble( encodedata* ed, unsigned char nibble ) {
|
|
if( ed->nibblewaiting ) {
|
|
ed->data[ed->count++]|= nibble;
|
|
ed->nibblewaiting= 0;
|
|
} else {
|
|
ed->data[ed->count]= nibble<<4;
|
|
ed->nibblewaiting= 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
encode_pixels( encodedata* ed, int color, int number ) {
|
|
if(number > 3) {
|
|
if(number > 15) {
|
|
encode_put_nibble( ed, 0 );
|
|
if(number > 63) {
|
|
encode_put_nibble( ed, (number & 0xC0)>>6 );
|
|
}
|
|
}
|
|
encode_put_nibble( ed, (number & 0x3C)>>2 );
|
|
}
|
|
encode_put_nibble( ed, ((number & 0xF)<<2) | color);
|
|
}
|
|
|
|
static void
|
|
encode_eol( encodedata* ed ) {
|
|
if( ed->nibblewaiting ) {
|
|
ed->count++;
|
|
ed->nibblewaiting= 0;
|
|
}
|
|
ed->data[ed->count++]= 0x00;
|
|
ed->data[ed->count++]= 0x00;
|
|
}
|
|
|
|
static void
|
|
encode_do_row( encodedata* ed, pixbuf* pb, int row ) {
|
|
int i= 0;
|
|
unsigned char* pix= pb->pixels + row * pb->x;
|
|
int color= *pix;
|
|
int n= 0; /* the number of pixels of this color */
|
|
|
|
while( i++ < pb->x ) {
|
|
/* FIXME: watch this space for EOL */
|
|
if( *pix != color || n == 255 ) {
|
|
encode_pixels( ed, color, n );
|
|
color= *pix;
|
|
n= 1;
|
|
} else {
|
|
n++;
|
|
}
|
|
pix++;
|
|
}
|
|
|
|
/* this small optimization: (n>63) can save up to two bytes per line
|
|
* I wonder if this is compatible with all the hardware... */
|
|
if( color == 0 && n > 63 ) {
|
|
encode_eol( ed );
|
|
} else {
|
|
encode_pixels( ed, color, n );
|
|
}
|
|
|
|
if( ed->nibblewaiting ) {
|
|
ed->count++;
|
|
ed->nibblewaiting= 0;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
pixbuf_encode_rle(int x, int y, int w, int h, char *inbuf, int stride,encodedata *ed){
|
|
pixbuf pb;
|
|
int i, row;
|
|
pb.x = w;
|
|
pb.y = h;
|
|
|
|
pb.pixels = inbuf;
|
|
ed->count= 4;
|
|
ed->nibblewaiting= 0;
|
|
|
|
row= 0;
|
|
for( i= 0; i < pb.y; i++ ) {
|
|
encode_do_row(ed, &pb, row);
|
|
row+= 2;
|
|
if( row > pb.y ) {
|
|
row= 1;
|
|
ed->oddstart= ed->count;
|
|
}
|
|
}
|
|
encode_do_control(x,y, ed, &pb);
|
|
}
|
|
|
|
|
|
void
|
|
pixbuf_load_xpm( pixbuf* pb, char* xpm[] ) {
|
|
int colors, chrs, l, n;
|
|
char c[4], table[256];
|
|
unsigned char *b, *i;
|
|
|
|
sscanf( xpm[0], "%d %d %d %d", &pb->x, &pb->y, &colors, &chrs);
|
|
if( colors > 4 ) {
|
|
fprintf( stderr, "the pixmap MUST be 4 colors or less\n");
|
|
exit (-1);
|
|
}
|
|
if( chrs != 1 ) {
|
|
fprintf( stderr, "the XPM format MUST be 1 char per pixel\n");
|
|
exit (-1);
|
|
}
|
|
if( pb->x > 0xFFF || pb->y > 0xFFF ) {
|
|
fprintf( stderr, "the size is excesive\n");
|
|
exit (-1);
|
|
}
|
|
|
|
for( l=0; l<colors; l++ ) {
|
|
n= sscanf( xpm[l+1], "%c c #%x", &c[l], &pb->rgb[l]);
|
|
if( n < 2 ) {
|
|
/* this one is transparent */
|
|
pb->rgb[l]=0xff000000;
|
|
}
|
|
table[(int)c[l]]=l;
|
|
}
|
|
|
|
pb->pixels= malloc( pb->x * pb->y );
|
|
b= pb->pixels;
|
|
|
|
for( l= colors+1; l <= pb->y + colors; l++ ) {
|
|
i= xpm[l];
|
|
while( (int)*i) {
|
|
*b++ = table[*i++];
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
pixbuf_delete( pixbuf* pb ) {
|
|
free( pb->pixels );
|
|
}
|
|
|