mirror of https://github.com/mpv-player/mpv
354 lines
8.8 KiB
C
354 lines
8.8 KiB
C
/*
|
|
* Copyright (C) 2002 Samuel Hocevar <sam@zoy.org>,
|
|
* Håkan Hjort <d95hjort@dtek.chalmers.se>
|
|
*
|
|
* Modified for use with MPlayer, changes contained in libdvdread_changes.diff.
|
|
* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
|
|
* $Id$
|
|
*
|
|
* 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, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "dvd_reader.h"
|
|
#include "dvd_input.h"
|
|
|
|
/* The function pointers that is the exported interface of this file. */
|
|
dvd_input_t (*dvdinput_open) (const char *);
|
|
int (*dvdinput_close) (dvd_input_t);
|
|
int (*dvdinput_seek) (dvd_input_t, int);
|
|
int (*dvdinput_title) (dvd_input_t, int);
|
|
int (*dvdinput_read) (dvd_input_t, void *, int, int);
|
|
char * (*dvdinput_error) (dvd_input_t);
|
|
|
|
#ifdef HAVE_DVDCSS_DVDCSS_H
|
|
/* linking to libdvdcss */
|
|
#include <dvdcss/dvdcss.h>
|
|
#define DVDcss_open(a) dvdcss_open((char*)(a))
|
|
#define DVDcss_close dvdcss_close
|
|
#define DVDcss_seek dvdcss_seek
|
|
#define DVDcss_title dvdcss_title
|
|
#define DVDcss_read dvdcss_read
|
|
#define DVDcss_error dvdcss_error
|
|
#else
|
|
/* dlopening libdvdcss */
|
|
#include <dlfcn.h>
|
|
typedef struct dvdcss_s *dvdcss_handle;
|
|
static dvdcss_handle (*DVDcss_open) (const char *);
|
|
static int (*DVDcss_close) (dvdcss_handle);
|
|
static int (*DVDcss_seek) (dvdcss_handle, int, int);
|
|
static int (*DVDcss_title) (dvdcss_handle, int);
|
|
static int (*DVDcss_read) (dvdcss_handle, void *, int, int);
|
|
static char * (*DVDcss_error) (dvdcss_handle);
|
|
#endif
|
|
|
|
/* The DVDinput handle, add stuff here for new input methods. */
|
|
struct dvd_input_s {
|
|
/* libdvdcss handle */
|
|
dvdcss_handle dvdcss;
|
|
|
|
/* dummy file input */
|
|
int fd;
|
|
};
|
|
|
|
|
|
/**
|
|
* initialize and open a DVD device or file.
|
|
*/
|
|
static dvd_input_t css_open(const char *target)
|
|
{
|
|
dvd_input_t dev;
|
|
|
|
/* Allocate the handle structure */
|
|
dev = (dvd_input_t) malloc(sizeof(struct dvd_input_s));
|
|
if(dev == NULL) {
|
|
fprintf(stderr, "libdvdread: Could not allocate memory.\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* Really open it with libdvdcss */
|
|
dev->dvdcss = DVDcss_open(target);
|
|
if(dev->dvdcss == 0) {
|
|
fprintf(stderr, "libdvdread: Could not open %s with libdvdcss.\n", target);
|
|
free(dev);
|
|
return NULL;
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
|
|
/**
|
|
* return the last error message
|
|
*/
|
|
static char *css_error(dvd_input_t dev)
|
|
{
|
|
return DVDcss_error(dev->dvdcss);
|
|
}
|
|
|
|
/**
|
|
* seek into the device.
|
|
*/
|
|
static int css_seek(dvd_input_t dev, int blocks)
|
|
{
|
|
/* DVDINPUT_NOFLAGS should match the DVDCSS_NOFLAGS value. */
|
|
return DVDcss_seek(dev->dvdcss, blocks, DVDINPUT_NOFLAGS);
|
|
}
|
|
|
|
/**
|
|
* set the block for the begining of a new title (key).
|
|
*/
|
|
static int css_title(dvd_input_t dev, int block)
|
|
{
|
|
return DVDcss_title(dev->dvdcss, block);
|
|
}
|
|
|
|
/**
|
|
* read data from the device.
|
|
*/
|
|
static int css_read(dvd_input_t dev, void *buffer, int blocks, int flags)
|
|
{
|
|
return DVDcss_read(dev->dvdcss, buffer, blocks, flags);
|
|
}
|
|
|
|
/**
|
|
* close the DVD device and clean up the library.
|
|
*/
|
|
static int css_close(dvd_input_t dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = DVDcss_close(dev->dvdcss);
|
|
|
|
if(ret < 0)
|
|
return ret;
|
|
|
|
free(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* initialize and open a DVD device or file.
|
|
*/
|
|
static dvd_input_t file_open(const char *target)
|
|
{
|
|
dvd_input_t dev;
|
|
|
|
/* Allocate the library structure */
|
|
dev = (dvd_input_t) malloc(sizeof(struct dvd_input_s));
|
|
if(dev == NULL) {
|
|
fprintf(stderr, "libdvdread: Could not allocate memory.\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* Open the device */
|
|
dev->fd = open(target, O_RDONLY);
|
|
if(dev->fd < 0) {
|
|
perror("libdvdread: Could not open input");
|
|
free(dev);
|
|
return NULL;
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
|
|
/**
|
|
* return the last error message
|
|
*/
|
|
static char *file_error(dvd_input_t dev)
|
|
{
|
|
/* use strerror(errno)? */
|
|
return (char *)"unknown error";
|
|
}
|
|
|
|
/**
|
|
* seek into the device.
|
|
*/
|
|
static int file_seek(dvd_input_t dev, int blocks)
|
|
{
|
|
off_t pos;
|
|
|
|
pos = lseek(dev->fd, (off_t)blocks * (off_t)DVD_VIDEO_LB_LEN, SEEK_SET);
|
|
if(pos < 0) {
|
|
return pos;
|
|
}
|
|
/* assert pos % DVD_VIDEO_LB_LEN == 0 */
|
|
return (int) (pos / DVD_VIDEO_LB_LEN);
|
|
}
|
|
|
|
/**
|
|
* set the block for the begining of a new title (key).
|
|
*/
|
|
static int file_title(dvd_input_t dev, int block)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* read data from the device.
|
|
*/
|
|
static int file_read(dvd_input_t dev, void *buffer, int blocks, int flags)
|
|
{
|
|
size_t len;
|
|
ssize_t ret;
|
|
|
|
len = (size_t)blocks * DVD_VIDEO_LB_LEN;
|
|
|
|
while(len > 0) {
|
|
|
|
ret = read(dev->fd, buffer, len);
|
|
|
|
if(ret < 0) {
|
|
/* One of the reads failed, too bad. We won't even bother
|
|
* returning the reads that went ok, and as in the posix spec
|
|
* the file postition is left unspecified after a failure. */
|
|
return ret;
|
|
}
|
|
|
|
if(ret == 0) {
|
|
/* Nothing more to read. Return the whole blocks, if any, that we got.
|
|
and adjust the file possition back to the previous block boundary. */
|
|
size_t bytes = (size_t)blocks * DVD_VIDEO_LB_LEN - len;
|
|
off_t over_read = -(bytes % DVD_VIDEO_LB_LEN);
|
|
/*off_t pos =*/ lseek(dev->fd, over_read, SEEK_CUR);
|
|
/* should have pos % 2048 == 0 */
|
|
return (int) (bytes / DVD_VIDEO_LB_LEN);
|
|
}
|
|
|
|
len -= ret;
|
|
}
|
|
|
|
return blocks;
|
|
}
|
|
|
|
/**
|
|
* close the DVD device and clean up.
|
|
*/
|
|
static int file_close(dvd_input_t dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = close(dev->fd);
|
|
|
|
if(ret < 0)
|
|
return ret;
|
|
|
|
free(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Setup read functions with either libdvdcss or minimal DVD access.
|
|
*/
|
|
int dvdinput_setup(void)
|
|
{
|
|
void *dvdcss_library = NULL;
|
|
char **dvdcss_version = NULL;
|
|
|
|
#ifdef HAVE_DVDCSS_DVDCSS_H
|
|
/* linking to libdvdcss */
|
|
dvdcss_library = &dvdcss_library; /* Give it some value != NULL */
|
|
/* the DVDcss_* functions have been #defined at the top */
|
|
dvdcss_version = &dvdcss_interface_2;
|
|
|
|
#else
|
|
/* dlopening libdvdcss */
|
|
dvdcss_library = dlopen("libdvdcss.so.2", RTLD_LAZY);
|
|
|
|
if(dvdcss_library != NULL) {
|
|
#if defined(__OpenBSD__) && !defined(__ELF__)
|
|
#define U_S "_"
|
|
#else
|
|
#define U_S
|
|
#endif
|
|
DVDcss_open = (dvdcss_handle (*)(const char*))
|
|
dlsym(dvdcss_library, U_S "dvdcss_open");
|
|
DVDcss_close = (int (*)(dvdcss_handle))
|
|
dlsym(dvdcss_library, U_S "dvdcss_close");
|
|
DVDcss_title = (int (*)(dvdcss_handle, int))
|
|
dlsym(dvdcss_library, U_S "dvdcss_title");
|
|
DVDcss_seek = (int (*)(dvdcss_handle, int, int))
|
|
dlsym(dvdcss_library, U_S "dvdcss_seek");
|
|
DVDcss_read = (int (*)(dvdcss_handle, void*, int, int))
|
|
dlsym(dvdcss_library, U_S "dvdcss_read");
|
|
DVDcss_error = (char* (*)(dvdcss_handle))
|
|
dlsym(dvdcss_library, U_S "dvdcss_error");
|
|
|
|
dvdcss_version = (char **)dlsym(dvdcss_library, U_S "dvdcss_interface_2");
|
|
|
|
if(dlsym(dvdcss_library, U_S "dvdcss_crack")) {
|
|
fprintf(stderr,
|
|
"libdvdread: Old (pre-0.0.2) version of libdvdcss found.\n"
|
|
"libdvdread: You should get the latest version from "
|
|
"http://www.videolan.org/\n" );
|
|
dlclose(dvdcss_library);
|
|
dvdcss_library = NULL;
|
|
} else if(!DVDcss_open || !DVDcss_close || !DVDcss_title || !DVDcss_seek
|
|
|| !DVDcss_read || !DVDcss_error || !dvdcss_version) {
|
|
fprintf(stderr, "libdvdread: Missing symbols in libdvdcss.so.2, "
|
|
"this shouldn't happen !\n");
|
|
dlclose(dvdcss_library);
|
|
}
|
|
}
|
|
#endif /* HAVE_DVDCSS_DVDCSS_H */
|
|
|
|
if(dvdcss_library != NULL) {
|
|
/*
|
|
char *psz_method = getenv( "DVDCSS_METHOD" );
|
|
char *psz_verbose = getenv( "DVDCSS_VERBOSE" );
|
|
fprintf(stderr, "DVDCSS_METHOD %s\n", psz_method);
|
|
fprintf(stderr, "DVDCSS_VERBOSE %s\n", psz_verbose);
|
|
*/
|
|
/*
|
|
fprintf(stderr, "libdvdread: Using libdvdcss version %s for DVD access\n",
|
|
*dvdcss_version);
|
|
*/
|
|
|
|
/* libdvdcss wrapper functions */
|
|
dvdinput_open = css_open;
|
|
dvdinput_close = css_close;
|
|
dvdinput_seek = css_seek;
|
|
dvdinput_title = css_title;
|
|
dvdinput_read = css_read;
|
|
dvdinput_error = css_error;
|
|
return 1;
|
|
|
|
} else {
|
|
fprintf(stderr, "libdvdread: Encrypted DVD support unavailable.\n");
|
|
|
|
/* libdvdcss replacement functions */
|
|
dvdinput_open = file_open;
|
|
dvdinput_close = file_close;
|
|
dvdinput_seek = file_seek;
|
|
dvdinput_title = file_title;
|
|
dvdinput_read = file_read;
|
|
dvdinput_error = file_error;
|
|
return 0;
|
|
}
|
|
}
|