Rename internal libdvdread fork from dvdread to libdvdread

to avoid clashing with external libdvdread.
(Sync with libdvdread r1122)


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27498 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 414 insertions, 0 deletions

diff --git a/libdvdread/dvd_input.c b/libdvdread/dvd_input.c
new file mode 100644
index 0000000000..35359821bd
--- /dev/null
+++ b/libdvdread/dvd_input.c
@@ -0,0 +1,414 @@
+/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */
+/*
+ * Copyright (C) 2002 Samuel Hocevar <sam@zoy.org>,
+ *                    Håkan Hjort <d95hjort@dtek.chalmers.se>
+ *
+ * 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>
+#define __USE_GNU /* to get O_DIRECT in linux */
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "dvd_reader.h"
+#include "dvd_input.h"
+
+#include "dvdread_internal.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); 
+/**
+ *  pointer must be aligned to 2048 bytes
+ *  if reading from a raw/O_DIRECT file
+ */
+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) {
+    /* malloc has set errno to ENOMEM */
+    return NULL;
+  }
+  
+  /* Really open it with libdvdcss */
+  dev->dvdcss = DVDcss_open(target);
+  if(dev->dvdcss == 0) {
+    free(dev);
+    dev = 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;
+}
+
+/* Need to use O_BINARY for WIN32 */
+#ifndef O_BINARY
+#ifdef _O_BINARY
+#define O_BINARY _O_BINARY
+#else
+#define O_BINARY 0
+#endif
+#endif
+
+/**
+ * initialize and open a DVD device or file.
+ */
+static dvd_input_t file_open(const char *target)
+{
+  dvd_input_t dev;
+  char *use_odirect;
+  int oflags;
+  
+  oflags = O_RDONLY | O_BINARY;
+  use_odirect = getenv("DVDREAD_USE_DIRECT");
+  if(use_odirect) {
+#ifndef O_DIRECT
+#define O_DIRECT 0
+#endif
+    oflags |= O_DIRECT;
+  }
+  /* Allocate the library structure */
+  dev = (dvd_input_t) malloc(sizeof(struct dvd_input_s));
+  if(dev == NULL) {
+    return NULL;
+  }
+  
+  /* Open the device */
+  dev->fd = open(target, oflags);
+  if(dev->fd < 0) {
+    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 = (off_t)blocks * (off_t)DVD_VIDEO_LB_LEN;
+
+  pos = lseek(dev->fd, pos, 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;
+  unsigned char *buf = buffer;
+
+  len = (size_t)blocks * DVD_VIDEO_LB_LEN;
+  
+  while(len > 0) {
+    
+    ret = read(dev->fd, buf, 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);
+    }
+    
+    buf+=ret;
+    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;
+}
+
+
+static void *dvdcss_library = NULL;
+static int dvdcss_library_init = 0;
+
+/**
+ * Free any objects allocated by dvdinput_setup.
+ * Should only be called when libdvdread is not to be used any more.
+ * Closes dlopened libraries.
+ */
+void dvdinput_free(void)
+{
+#ifdef HAVE_DVDCSS_DVDCSS_H
+  /* linked statically, nothing to free */
+  return;
+#else
+  if(dvdcss_library) {
+    dlclose(dvdcss_library);
+    dvdcss_library = NULL;
+  }
+  dvdcss_library_init = 0;
+  return;
+#endif
+}
+
+
+/**
+ * Setup read functions with either libdvdcss or minimal DVD access.
+ */
+int dvdinput_setup(void)
+{
+  char **dvdcss_version = NULL;
+  int verbose;
+
+  /* dlopening libdvdcss */
+  if(dvdcss_library_init) {
+    /* libdvdcss is already dlopened, function ptrs set */
+    if(dvdcss_library) {
+      return 1; /* css available */
+    } else {
+      return 0; /* css not available */
+    }
+  }
+
+  verbose = get_verbose();
+  
+#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
+
+  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")) {
+      if(verbose >= 0) {
+        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) {
+      if(verbose >= 0) {
+        fprintf(stderr,  "libdvdread: Missing symbols in libdvdcss.so.2, "
+                "this shouldn't happen !\n");
+      }
+      dlclose(dvdcss_library);
+      dvdcss_library = NULL;
+    }
+  }
+#endif /* HAVE_DVDCSS_DVDCSS_H */
+
+  dvdcss_library_init = 1;
+  
+  if(dvdcss_library) {
+    /*
+      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);
+    */
+    if(verbose >= 1) {
+      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 {
+    if(verbose >= 1) {
+      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;
+  }
+}