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/* mb-desktop-xine - a desktop media playing module.
Copyright 2004 Matthew Allum
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, 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.
*/
#include "xinebrowser.h"
static int trapped_error_code = 0;
static int (*old_error_handler) (Display *d, XErrorEvent *e);
int
error_handler(Display *display,
XErrorEvent *error)
{
trapped_error_code = error->error_code;
return 0;
}
void
trap_errors(void)
{
trapped_error_code = 0;
old_error_handler = XSetErrorHandler(error_handler);
}
int
untrap_errors(void)
{
XSetErrorHandler(old_error_handler);
return trapped_error_code;
}
Bool
file_exists(char *filename)
{
struct stat st;
if (stat(filename, &st)) return False;
return True;
}
int
xinebrowser_cd_get_disc_type(char *device)
{
int fd; /* file descriptor for CD-ROM device */
int status; /* return status for system calls */
int i, have_cd = 0, had_cd = 0, cd_type = CD_TYPE_UNKNOWN;
/* Should check permissions */
fd = open(device, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
fprintf (stderr, "mbxine: open failed for `%s': %s\n",
device, strerror (errno));
return CD_TYPE_ERROR;
}
status = ioctl (fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
if (status < 0)
{
perror(" CDROM_DRIVE_STATUS");
close(fd);
return CD_TYPE_ERROR;
}
if (status != CDS_DISC_OK) /* CDS_TRAY_OPEN CDS_DRIVE_NOT_READY */
{
return CD_TYPE_NO_DISC;
}
cd_type = CD_TYPE_UNKNOWN;
status = ioctl (fd, CDROM_DISC_STATUS);
switch (status)
{
case CDS_AUDIO:
cd_type = CD_TYPE_AUDIO;
break;
case CDS_DATA_1:
case CDS_DATA_2:
case CDS_XA_2_1:
case CDS_XA_2_2:
cd_type = CD_TYPE_DATA;
break;
case CDS_NO_INFO:
case CDS_MIXED:
default:
cd_type = CD_TYPE_UNKNOWN;
}
if (cd_type == CD_TYPE_UNKNOWN || cd_type == CD_TYPE_DATA)
{
/* See if its a DVD */
int foo;
dvd_struct dvd;
dvd.type = DVD_STRUCT_COPYRIGHT;
dvd.copyright.layer_num = 0;
status = ioctl( fd, DVD_READ_STRUCT, &dvd );
/*
dvd.copyright.cpst == 0 if encrypted
*/
if (status >= 0)
{
cd_type = CD_TYPE_DVD;
}
}
close(fd);
return cd_type;
}
/* Code taken from:
* transcode Copyright (C) Thomas Oestreich - June 2001
* enix enix.berlios.de
*/
void
yuy2toyv12 (unsigned char *y,
unsigned char *u,
unsigned char *v,
unsigned char *input,
int width,
int height)
{
int i, j, w2;
w2 = width / 2;
for (i = 0; i < height; i += 2)
{
for (j = 0; j < w2; j++) {
/* packed YUV 422 is: Y[i] U[i] Y[i+1] V[i] */
*(y++) = *(input++);
*(u++) = *(input++);
*(y++) = *(input++);
*(v++) = *(input++);
}
/* down sampling */
for (j = 0; j < w2; j++) {
/* skip every second line for U and V */
*(y++) = *(input++);
input++;
*(y++) = *(input++);
input++;
}
}
}
#define clip_8_bit(val) \
{ \
if (val < 0) \
val = 0; \
else \
if (val > 255) val = 255; \
}
unsigned char*
yv12torgb (unsigned char *src_y,
unsigned char *src_u,
unsigned char *src_v,
int width,
int height)
{
int i, j;
int y, u, v;
int r, g, b;
int sub_i_uv;
int sub_j_uv;
int uv_width, uv_height;
unsigned char *rgb;
uv_width = width / 2;
uv_height = height / 2;
rgb = (unsigned char *) malloc (width * height * 3);
if (!rgb)
return NULL;
for (i = 0; i < height; ++i) {
/* calculate u & v rows */
sub_i_uv = ((i * uv_height) / height);
for (j = 0; j < width; ++j) {
/* calculate u & v columns */
sub_j_uv = ((j * uv_width) / width);
/***************************************************
* Colour conversion from
* http://www.inforamp.net/~poynton/notes/colour_and_gamma/ColorFAQ.html#RTFToC30
*
* Thanks to Billy Biggs <vektor@dumbterm.net>
* for the pointer and the following conversion.
*
* R' = [ 1.1644 0 1.5960 ] ([ Y' ] [ 16 ])
* G' = [ 1.1644 -0.3918 -0.8130 ] * ([ Cb ] - [ 128 ])
* B' = [ 1.1644 2.0172 0 ] ([ Cr ] [ 128 ])
*
* Where in xine the above values are represented as
* Y' == image->y
* Cb == image->u
* Cr == image->v
*
***************************************************/
y = src_y[(i * width) + j] - 16;
u = src_u[(sub_i_uv * uv_width) + sub_j_uv] - 128;
v = src_v[(sub_i_uv * uv_width) + sub_j_uv] - 128;
r = (1.1644 * y) + (1.5960 * v);
g = (1.1644 * y) - (0.3918 * u) - (0.8130 * v);
b = (1.1644 * y) + (2.0172 * u);
clip_8_bit (r);
clip_8_bit (g);
clip_8_bit (b);
rgb[(i * width + j) * 3 + 0] = r;
rgb[(i * width + j) * 3 + 1] = g;
rgb[(i * width + j) * 3 + 2] = b;
}
}
return rgb;
}
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