ref: 06626375c5f96a98eabddcd928ba1c269665498f
parent: 2b99a49bad03ee880d1a8a2ff65d9080be934f45
author: Sam Hocevar <sam@videolan.org>
date: Fri Oct 18 14:48:59 EDT 2002
* ./src/device.c: split the open, read and seek functions so that we can
use function pointers instead of doing the if(WIN2K) test.
* ./src/device.c: if the target is not a drive name such as F:, we open
it with the standard libc functions, even under Win32.
--- a/src/css.c
+++ b/src/css.c
@@ -2,7 +2,7 @@
* css.c: Functions for DVD authentication and descrambling
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
- * $Id: css.c,v 1.17 2002/10/10 21:40:41 massiot Exp $
+ * $Id: css.c,v 1.18 2002/10/18 18:48:58 sam Exp $
*
* Author: St�phane Borel <stef@via.ecp.fr>
* H�kan Hjort <d95hjort@dtek.chalmers.se>
@@ -255,7 +255,7 @@
/*****************************************************************************
* _dvdcss_title: crack or decrypt the current title key if needed
*****************************************************************************
- * This function should only be called by dvdcss_seek and should eventually
+ * This function should only be called by dvdcss->pf_seek and should eventually
* not be external if possible.
*****************************************************************************/
int _dvdcss_title ( dvdcss_t dvdcss, int i_block )
@@ -519,9 +519,9 @@
_dvdcss_debug( dvdcss, "resetting drive and cracking title key" );
/* Read an unscrambled sector and reset the drive */
- _dvdcss_seek( dvdcss, 0 );
- _dvdcss_read( dvdcss, p_garbage, 1 );
- _dvdcss_seek( dvdcss, 0 );
+ dvdcss->pf_seek( dvdcss, 0 );
+ dvdcss->pf_read( dvdcss, p_garbage, 1 );
+ dvdcss->pf_seek( dvdcss, 0 );
_dvdcss_disckey( dvdcss );
/* Fallback */
@@ -1352,7 +1352,7 @@
do
{- i_ret = _dvdcss_seek( dvdcss, i_pos );
+ i_ret = dvdcss->pf_seek( dvdcss, i_pos );
if( i_ret != i_pos )
{--- a/src/device.c
+++ b/src/device.c
@@ -2,7 +2,7 @@
* device.h: DVD device access
*****************************************************************************
* Copyright (C) 1998-2002 VideoLAN
- * $Id: device.c,v 1.4 2002/10/10 12:44:28 gbazin Exp $
+ * $Id: device.c,v 1.5 2002/10/18 18:48:59 sam Exp $
*
* Authors: St�phane Borel <stef@via.ecp.fr>
* Samuel Hocevar <sam@zoy.org>
@@ -54,67 +54,34 @@
#include "device.h"
/*****************************************************************************
- * Device reading prototypes, win32 specific
+ * Device reading prototypes
*****************************************************************************/
+static int libc_open ( dvdcss_t, char const * );
+static int libc_seek ( dvdcss_t, int );
+static int libc_read ( dvdcss_t, void *, int );
+static int libc_readv ( dvdcss_t, struct iovec *, int );
+
#ifdef WIN32
-int _win32_dvdcss_readv ( int, struct iovec *, int, char * );
-int _win32_dvdcss_aopen ( dvdcss_t, char );
-int _win32_dvdcss_aclose ( int );
-int _win32_dvdcss_aseek ( int, int, int );
-int _win32_dvdcss_aread ( int, void *, int );
+static int win2k_open ( dvdcss_t, char const * );
+static int aspi_open ( dvdcss_t, char const * );
+static int win2k_seek ( dvdcss_t, int );
+static int aspi_seek ( dvdcss_t, int );
+static int win2k_read ( dvdcss_t, void *, int );
+static int aspi_read ( dvdcss_t, void *, int );
+static int win_readv ( dvdcss_t, struct iovec *, int );
+
+static int aspi_read_internal ( int, void *, int );
#endif
-/*****************************************************************************
- * readv_*: readv() replacements for iovec-impaired C libraries
- *****************************************************************************/
-#if defined( WIN32 )
-static inline int readv( int i_fd, struct iovec * p_iovec, int i_count )
+int _dvdcss_use_ioctls( dvdcss_t dvdcss )
{- int i_index, i_len, i_total = 0;
- unsigned char *p_base;
- int i_bytes;
-
- for( i_index = i_count; i_index; i_index-- )
+#if defined( WIN32 )
+ if( dvdcss->b_file )
{- i_len = p_iovec->iov_len;
- p_base = p_iovec->iov_base;
-
- /* Loop is unrolled one time to spare the (i_bytes <= 0) test */
-
- if( i_len > 0 )
- {- i_bytes = read( i_fd, p_base, i_len );
-
- if( i_bytes < 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 -1;
- }
-
- i_total += i_bytes;
-
- if( i_bytes != i_len )
- {- /* we reached the end of the file or a signal interrupted
- the read */
- return i_total;
- }
- }
-
- p_iovec++;
+ return 0;
}
- return i_total;
-}
-#endif /* WIN32 */
-
-int _dvdcss_use_ioctls( dvdcss_t dvdcss )
-{-#if defined( WIN32 )
- /* Some one need to implement this for Windows */
+ /* FIXME: implement this for Windows */
if( WIN2K )
{return 1;
@@ -161,70 +128,50 @@
int _dvdcss_open ( dvdcss_t dvdcss )
{- char *psz_device = dvdcss->psz_device;
+ char psz_debug[200];
+ char const *psz_device = dvdcss->psz_device;
+ snprintf( psz_debug, 199, "opening target `%s'", psz_device );
+ psz_debug[199] = '\0';
+ _dvdcss_debug( dvdcss, psz_debug );
+
#if defined( WIN32 )
- if( WIN2K )
- {- char psz_dvd[7];
- _snprintf( psz_dvd, 7, "\\\\.\\%c:", psz_device[0] );
+ /* If device is not "X:", we are actually opening a file. */
+ dvdcss->b_file = !psz_device[0] || psz_device[1] != ':' || psz_device[3];
- /* To work around an M$ bug in IOCTL_DVD_READ_STRUCTURE, we need read
- * _and_ write access to the device (so we can make SCSI Pass Through
- * Requests). Unfortunately this is only allowed if you have
- * administrator priviledges so we allow for a fallback method with
- * only read access to the device (in this case ioctl_ReadCopyright()
- * won't send back the right result).
- * (See Microsoft Q241374: Read and Write Access Required for SCSI
- * Pass Through Requests) */
- (HANDLE) dvdcss->i_fd =
- CreateFile( psz_dvd, GENERIC_READ | GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING,
- FILE_FLAG_RANDOM_ACCESS, NULL );
-
- if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE )
- (HANDLE) dvdcss->i_fd =
- CreateFile( psz_dvd, GENERIC_READ, FILE_SHARE_READ,
- NULL, OPEN_EXISTING,
- FILE_FLAG_RANDOM_ACCESS, NULL );
-
- if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE )
- {- _dvdcss_error( dvdcss, "failed opening device" );
- return -1;
- }
- }
- else
- {- dvdcss->i_fd = _win32_dvdcss_aopen( dvdcss, psz_device[0] );
- if( dvdcss->i_fd == -1 )
- {- _dvdcss_error( dvdcss, "failed opening device" );
- return -1;
- }
- }
-
- /* initialise readv temporary buffer */
+ /* Initialize readv temporary buffer */
dvdcss->p_readv_buffer = NULL;
dvdcss->i_readv_buf_size = 0;
-#else
- dvdcss->i_fd = dvdcss->i_read_fd = open( psz_device, 0 );
-
- if( dvdcss->i_fd == -1 )
+ if( !dvdcss->b_file && WIN2K )
{- _dvdcss_error( dvdcss, "failed opening device" );
- return -1;
+ _dvdcss_debug( dvdcss, "using Win2K API for access" );
+ dvdcss->pf_seek = win2k_seek;
+ dvdcss->pf_read = win2k_read;
+ dvdcss->pf_readv = win_readv;
+ return win2k_open( dvdcss, psz_device );
}
-
+ else if( !dvdcss->b_file )
+ {+ _dvdcss_debug( dvdcss, "using ASPI for access" );
+ dvdcss->pf_seek = aspi_seek;
+ dvdcss->pf_read = aspi_read;
+ dvdcss->pf_readv = win_readv;
+ return aspi_open( dvdcss, psz_device );
+ }
+ else
#endif
-
- return 0;
+ {+ _dvdcss_debug( dvdcss, "using libc for access" );
+ dvdcss->pf_seek = libc_seek;
+ dvdcss->pf_read = libc_read;
+ dvdcss->pf_readv = libc_readv;
+ return libc_open( dvdcss, psz_device );
+ }
}
#ifndef WIN32
-int _dvdcss_raw_open ( dvdcss_t dvdcss, char *psz_device )
+int _dvdcss_raw_open ( dvdcss_t dvdcss, char const *psz_device )
{dvdcss->i_raw_fd = open( psz_device, 0 );
@@ -245,13 +192,21 @@
int _dvdcss_close ( dvdcss_t dvdcss )
{#if defined( WIN32 )
- if( WIN2K )
+ if( dvdcss->b_file )
{+ close( dvdcss->i_fd );
+ }
+ else if( WIN2K )
+ {CloseHandle( (HANDLE) dvdcss->i_fd );
}
- else
+ else /* ASPI */
{- _win32_dvdcss_aclose( dvdcss->i_fd );
+ struct w32_aspidev *fd = (struct w32_aspidev *) dvdcss->i_fd;
+
+ /* Unload aspi and free w32_aspidev structure */
+ FreeLibrary( (HMODULE) fd->hASPI );
+ free( (void*) dvdcss->i_fd );
}
/* Free readv temporary buffer */
@@ -262,6 +217,7 @@
dvdcss->i_readv_buf_size = 0;
}
+ return 0;
#else
close( dvdcss->i_fd );
@@ -271,198 +227,68 @@
dvdcss->i_raw_fd = -1;
}
-#endif
-
return 0;
-}
-
-int _dvdcss_seek ( dvdcss_t dvdcss, int i_blocks )
-{-#if defined( WIN32 )
- dvdcss->i_seekpos = i_blocks;
-
- if( WIN2K )
- {- LARGE_INTEGER li_read;
-
-#ifndef INVALID_SET_FILE_POINTER
-#define INVALID_SET_FILE_POINTER ((DWORD)-1)
#endif
-
- li_read.QuadPart = (LONGLONG)i_blocks * DVDCSS_BLOCK_SIZE;
-
- li_read.LowPart = SetFilePointer( (HANDLE) dvdcss->i_fd,
- li_read.LowPart,
- &li_read.HighPart, FILE_BEGIN );
- if( (li_read.LowPart == INVALID_SET_FILE_POINTER)
- && GetLastError() != NO_ERROR)
- {- li_read.QuadPart = -DVDCSS_BLOCK_SIZE;
- }
-
- li_read.QuadPart /= DVDCSS_BLOCK_SIZE;
- return (int)li_read.QuadPart;
- }
- else
- {- return ( _win32_dvdcss_aseek( dvdcss->i_fd, i_blocks, SEEK_SET ) );
- }
-#else
- off_t i_read;
-
- dvdcss->i_seekpos = i_blocks;
-
- i_read = lseek( dvdcss->i_read_fd,
- (off_t)i_blocks * (off_t)DVDCSS_BLOCK_SIZE, SEEK_SET );
-
- if( i_read < 0 )
- {- _dvdcss_error( dvdcss, "seek error" );
- }
-
- return i_read / DVDCSS_BLOCK_SIZE;
-#endif
-
}
-int _dvdcss_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks )
-{-#if defined( WIN32 )
- if( WIN2K )
- {- int i_bytes;
+/* Following functions are local */
- if( !ReadFile( (HANDLE) dvdcss->i_fd, p_buffer,
- i_blocks * DVDCSS_BLOCK_SIZE,
- (LPDWORD)&i_bytes, NULL ) )
- {- return -1;
- }
- return i_bytes / DVDCSS_BLOCK_SIZE;
- }
- else
- {- return _win32_dvdcss_aread( dvdcss->i_fd, p_buffer, i_blocks );
- }
-
+/*****************************************************************************
+ * Open commands.
+ *****************************************************************************/
+static int libc_open ( dvdcss_t dvdcss, char const *psz_device )
+{+#if !defined( WIN32 )
+ dvdcss->i_fd = dvdcss->i_read_fd = open( psz_device, 0 );
#else
- int i_ret;
- /* TODO: partial reads are wrong,i.e 2200/2048 = 1
- * but the location has advanced 2200 bytes (lseek possition that is) */
- i_ret = read( dvdcss->i_read_fd, p_buffer,
- (off_t)i_blocks * DVDCSS_BLOCK_SIZE );
- if( i_ret < 0 )
- {- _dvdcss_error( dvdcss, "read error" );
- return i_ret;
- }
-
- return i_ret / DVDCSS_BLOCK_SIZE;
+ dvdcss->i_fd = dvdcss->i_read_fd = open( psz_device, O_BINARY );
#endif
-}
-
-int _dvdcss_readv ( dvdcss_t dvdcss, struct iovec *p_iovec, int i_blocks )
-{- int i_read;
-
-#if defined( WIN32 )
- /* Check the size of the readv temp buffer, just in case we need to
- * realloc something bigger */
- if( dvdcss->i_readv_buf_size < i_blocks * DVDCSS_BLOCK_SIZE )
+ if( dvdcss->i_fd == -1 )
{- dvdcss->i_readv_buf_size = i_blocks * DVDCSS_BLOCK_SIZE;
-
- if( dvdcss->p_readv_buffer ) free( dvdcss->p_readv_buffer );
-
- /* Allocate a buffer which will be used as a temporary storage
- * for readv */
- dvdcss->p_readv_buffer = malloc( dvdcss->i_readv_buf_size );
- if( !dvdcss->p_readv_buffer )
- {- _dvdcss_error( dvdcss, " failed (readv)" );
- return -1;
- }
+ _dvdcss_error( dvdcss, "failed opening device" );
+ return -1;
}
- i_read = _win32_dvdcss_readv( dvdcss->i_fd, p_iovec, i_blocks,
- dvdcss->p_readv_buffer );
- return i_read;
-
-#else
- i_read = readv( dvdcss->i_read_fd, p_iovec, i_blocks );
- return i_read / DVDCSS_BLOCK_SIZE;
-
-#endif
+ return 0;
}
-
#if defined( WIN32 )
-
-/*****************************************************************************
- * _win32_dvdcss_readv: vectored read using ReadFile for Win2K and
- * _win32_dvdcss_aread for win9x
- *****************************************************************************/
-int _win32_dvdcss_readv( int i_fd, struct iovec *p_iovec,
- int i_num_buffers, char *p_tmp_buffer )
+static int win2k_open ( dvdcss_t dvdcss, char const *psz_device )
{- int i_index;
- int i_blocks, i_blocks_total = 0;
+ char psz_dvd[7];
+ _snprintf( psz_dvd, 7, "\\\\.\\%c:", psz_device[0] );
- for( i_index = i_num_buffers; i_index; i_index-- )
- {- i_blocks_total += p_iovec[i_index-1].iov_len;
- }
+ /* To work around an M$ bug in IOCTL_DVD_READ_STRUCTURE, we need read
+ * _and_ write access to the device (so we can make SCSI Pass Through
+ * Requests). Unfortunately this is only allowed if you have
+ * administrator priviledges so we allow for a fallback method with
+ * only read access to the device (in this case ioctl_ReadCopyright()
+ * won't send back the right result).
+ * (See Microsoft Q241374: Read and Write Access Required for SCSI
+ * Pass Through Requests) */
+ (HANDLE) dvdcss->i_fd =
+ CreateFile( psz_dvd, GENERIC_READ | GENERIC_WRITE,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING,
+ FILE_FLAG_RANDOM_ACCESS, NULL );
- if( i_blocks_total <= 0 ) return 0;
+ if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE )
+ (HANDLE) dvdcss->i_fd =
+ CreateFile( psz_dvd, GENERIC_READ, FILE_SHARE_READ,
+ NULL, OPEN_EXISTING,
+ FILE_FLAG_RANDOM_ACCESS, NULL );
- i_blocks_total /= DVDCSS_BLOCK_SIZE;
-
- if( WIN2K )
+ if( (HANDLE) dvdcss->i_fd == INVALID_HANDLE_VALUE )
{- unsigned long int i_bytes;
- if( !ReadFile( (HANDLE)i_fd, p_tmp_buffer,
- i_blocks_total * DVDCSS_BLOCK_SIZE, &i_bytes, NULL ) )
- {- return -1;
- /* The read failed... too bad.
- As in the posix spec the file postition is left
- unspecified after a failure */
- }
- i_blocks = i_bytes / DVDCSS_BLOCK_SIZE;
+ _dvdcss_error( dvdcss, "failed opening device" );
+ return -1;
}
- else /* Win9x */
- {- i_blocks = _win32_dvdcss_aread( i_fd, p_tmp_buffer, i_blocks_total );
- if( i_blocks < 0 )
- {- return -1; /* idem */
- }
- }
- /* We just have to copy the content of the temp buffer into the iovecs */
- i_index = 0;
- i_blocks_total = i_blocks;
- while( i_blocks_total > 0 )
- {- memcpy( p_iovec[i_index].iov_base,
- &p_tmp_buffer[(i_blocks - i_blocks_total) * DVDCSS_BLOCK_SIZE],
- p_iovec[i_index].iov_len );
- /* if we read less blocks than asked, we'll just end up copying
- garbage, this isn't an issue as we return the number of
- blocks actually read */
- i_blocks_total -= ( p_iovec[i_index].iov_len / DVDCSS_BLOCK_SIZE );
- i_index++;
- }
-
- return i_blocks;
+ return 0;
}
-/*****************************************************************************
- * _win32_dvdcss_aopen: open dvd drive (load aspi and init w32_aspidev
- * structure)
- *****************************************************************************/
-int _win32_dvdcss_aopen( dvdcss_t dvdcss, char c_drive )
+static int aspi_open( dvdcss_t dvdcss, char const * psz_device )
{HMODULE hASPI;
DWORD dwSupportInfo;
@@ -470,7 +296,9 @@
int i, j, i_hostadapters;
long (*lpGetSupport)( void );
long (*lpSendCommand)( void* );
+ char c_drive = psz_device[0];
+ /* load aspi and init w32_aspidev structure */
hASPI = LoadLibrary( "wnaspi32.dll" );
if( hASPI == NULL )
{@@ -483,7 +311,7 @@
if(lpGetSupport == NULL || lpSendCommand == NULL )
{- _dvdcss_debug( dvdcss, "unable to get aspi function pointers" );
+ _dvdcss_error( dvdcss, "unable to get aspi function pointers" );
FreeLibrary( hASPI );
return -1;
}
@@ -492,7 +320,7 @@
if( HIBYTE( LOWORD ( dwSupportInfo ) ) == SS_NO_ADAPTERS )
{- _dvdcss_debug( dvdcss, "no host adapters found (aspi)" );
+ _dvdcss_error( dvdcss, "no ASPI adapters found" );
FreeLibrary( hASPI );
return -1;
}
@@ -507,6 +335,7 @@
i_hostadapters = LOBYTE( LOWORD( dwSupportInfo ) );
if( i_hostadapters == 0 )
{+ _dvdcss_error( dvdcss, "no ASPI adapters ready" );
FreeLibrary( hASPI );
return -1;
}
@@ -514,6 +343,7 @@
fd = malloc( sizeof( struct w32_aspidev ) );
if( fd == NULL )
{+ _dvdcss_error( dvdcss, "not enough memory" );
FreeLibrary( hASPI );
return -1;
}
@@ -543,7 +373,8 @@
(srbDiskInfo.SRB_Int13HDriveInfo == c_drive) )
{fd->i_sid = MAKEWORD( i, j );
- return (int) fd;
+ dvdcss->i_fd = (int) fd;
+ return 0;
}
}
}
@@ -550,39 +381,67 @@
free( (void*) fd );
FreeLibrary( hASPI );
- _dvdcss_debug( dvdcss, "unable to get haid and target (aspi)" );
- return( -1 );
+ _dvdcss_error( dvdcss, "unable to get haid and target (aspi)" );
+ return -1;
}
+#endif
/*****************************************************************************
- * _win32_dvdcss_aclose: close dvd drive (unload aspi and free w32_aspidev
- * structure)
+ * Seek commands.
*****************************************************************************/
-int _win32_dvdcss_aclose( int i_fd )
+static int libc_seek( dvdcss_t dvdcss, int i_blocks )
{- struct w32_aspidev *fd = (struct w32_aspidev *) i_fd;
+ off_t i_read;
- FreeLibrary( (HMODULE) fd->hASPI );
- free( (void*) i_fd );
+ dvdcss->i_seekpos = i_blocks;
- return 0;
+ i_read = lseek( dvdcss->i_read_fd,
+ (off_t)i_blocks * (off_t)DVDCSS_BLOCK_SIZE, SEEK_SET );
+
+ if( i_read < 0 )
+ {+ _dvdcss_error( dvdcss, "seek error" );
+ }
+
+ return i_read / DVDCSS_BLOCK_SIZE;
}
-/*****************************************************************************
- * _win32_dvdcss_aseek: aspi version of _dvdcss_seek
- *
- * returns the number of blocks read.
- *****************************************************************************/
-int _win32_dvdcss_aseek( int i_fd, int i_blocks, int i_method )
+#if defined( WIN32 )
+static int win2k_seek( dvdcss_t dvdcss, int i_blocks )
{+ LARGE_INTEGER li_read;
+
+ dvdcss->i_seekpos = i_blocks;
+
+#ifndef INVALID_SET_FILE_POINTER
+# define INVALID_SET_FILE_POINTER ((DWORD)-1)
+#endif
+
+ li_read.QuadPart = (LONGLONG)i_blocks * DVDCSS_BLOCK_SIZE;
+
+ li_read.LowPart = SetFilePointer( (HANDLE) dvdcss->i_fd,
+ li_read.LowPart,
+ &li_read.HighPart, FILE_BEGIN );
+ if( (li_read.LowPart == INVALID_SET_FILE_POINTER)
+ && GetLastError() != NO_ERROR)
+ {+ li_read.QuadPart = -DVDCSS_BLOCK_SIZE;
+ }
+
+ li_read.QuadPart /= DVDCSS_BLOCK_SIZE;
+ return (int)li_read.QuadPart;
+}
+
+static int aspi_seek( dvdcss_t dvdcss, int i_blocks )
+{int i_old_blocks;
char sz_buf[ DVDCSS_BLOCK_SIZE ];
- struct w32_aspidev *fd = (struct w32_aspidev *) i_fd;
+ struct w32_aspidev *fd = (struct w32_aspidev *) dvdcss->i_fd;
i_old_blocks = fd->i_blocks;
fd->i_blocks = i_blocks;
- if( _win32_dvdcss_aread( i_fd, sz_buf, 1 ) == -1 )
+ if( aspi_read_internal( dvdcss->i_fd, sz_buf, 1 ) == -1 )
{fd->i_blocks = i_old_blocks;
return -1;
@@ -592,14 +451,180 @@
return fd->i_blocks;
}
+#endif
/*****************************************************************************
- * _win32_dvdcss_aread: aspi version of _dvdcss_read
- *
- * returns the number of blocks read.
+ * Read commands.
*****************************************************************************/
-int _win32_dvdcss_aread( int i_fd, void *p_data, int i_blocks )
+static int libc_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks )
{+ int i_ret;
+ /* TODO: partial reads are wrong,i.e 2200/2048 = 1
+ * but the location has advanced 2200 bytes (lseek possition that is) */
+ i_ret = read( dvdcss->i_read_fd, p_buffer,
+ (off_t)i_blocks * DVDCSS_BLOCK_SIZE );
+ if( i_ret < 0 )
+ {+ _dvdcss_error( dvdcss, "read error" );
+ return i_ret;
+ }
+
+ return i_ret / DVDCSS_BLOCK_SIZE;
+}
+
+#if defined( WIN32 )
+static int win2k_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks )
+{+ int i_bytes;
+
+ if( !ReadFile( (HANDLE) dvdcss->i_fd, p_buffer,
+ i_blocks * DVDCSS_BLOCK_SIZE,
+ (LPDWORD)&i_bytes, NULL ) )
+ {+ return -1;
+ }
+
+ return i_bytes / DVDCSS_BLOCK_SIZE;
+}
+
+static int aspi_read ( dvdcss_t dvdcss, void *p_buffer, int i_blocks )
+{+ return aspi_read_internal( dvdcss->i_fd, p_buffer, i_blocks );
+}
+#endif
+
+/*****************************************************************************
+ * Readv commands.
+ *****************************************************************************/
+static int libc_readv ( dvdcss_t dvdcss, struct iovec *p_iovec, int i_blocks )
+{+#if defined( WIN32 )
+ int i_index, i_len, i_total = 0;
+ unsigned char *p_base;
+ int i_bytes;
+
+ for( i_index = i_blocks;
+ i_index;
+ i_index--, p_iovec++ )
+ {+ i_len = p_iovec->iov_len;
+ p_base = p_iovec->iov_base;
+
+ if( i_len <= 0 )
+ {+ continue;
+ }
+
+ i_bytes = read( dvdcss->i_fd, p_base, i_len );
+
+ if( i_bytes < 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 -1;
+ }
+
+ i_total += i_bytes;
+
+ if( i_bytes != i_len )
+ {+ /* We reached the end of the file or a signal interrupted
+ * the read. Return a partial read. */
+ return i_total / DVDCSS_BLOCK_SIZE;
+ }
+ }
+
+ return i_total / DVDCSS_BLOCK_SIZE;
+#else
+ int i_read = readv( dvdcss->i_read_fd, p_iovec, i_blocks );
+
+ return i_read / DVDCSS_BLOCK_SIZE;
+#endif
+}
+
+#if defined( WIN32 )
+/*****************************************************************************
+ * win_readv: vectored read using ReadFile for Win2K and ASPI for win9x
+ *****************************************************************************/
+static int win_readv ( dvdcss_t dvdcss, struct iovec *p_iovec, int i_blocks )
+{+ int i_index;
+ int i_blocks_read, i_blocks_total = 0;
+
+ /* Check the size of the readv temp buffer, just in case we need to
+ * realloc something bigger */
+ if( dvdcss->i_readv_buf_size < i_blocks * DVDCSS_BLOCK_SIZE )
+ {+ dvdcss->i_readv_buf_size = i_blocks * DVDCSS_BLOCK_SIZE;
+
+ if( dvdcss->p_readv_buffer ) free( dvdcss->p_readv_buffer );
+
+ /* Allocate a buffer which will be used as a temporary storage
+ * for readv */
+ dvdcss->p_readv_buffer = malloc( dvdcss->i_readv_buf_size );
+ if( !dvdcss->p_readv_buffer )
+ {+ _dvdcss_error( dvdcss, " failed (readv)" );
+ return -1;
+ }
+ }
+
+ for( i_index = i_blocks; i_index; i_index-- )
+ {+ i_blocks_total += p_iovec[i_index-1].iov_len;
+ }
+
+ if( i_blocks_total <= 0 ) return 0;
+
+ i_blocks_total /= DVDCSS_BLOCK_SIZE;
+
+ if( WIN2K )
+ {+ unsigned long int i_bytes;
+ if( !ReadFile( (HANDLE)dvdcss->i_fd, dvdcss->p_readv_buffer,
+ i_blocks_total * DVDCSS_BLOCK_SIZE, &i_bytes, NULL ) )
+ {+ /* The read failed... too bad.
+ * As in the posix spec the file postition is left
+ * unspecified after a failure */
+ return -1;
+ }
+ i_blocks_read = i_bytes / DVDCSS_BLOCK_SIZE;
+ }
+ else /* Win9x */
+ {+ i_blocks_read = aspi_read_internal( dvdcss->i_fd,
+ dvdcss->p_readv_buffer,
+ i_blocks_total );
+ if( i_blocks_read < 0 )
+ {+ /* See above */
+ return -1;
+ }
+ }
+
+ /* We just have to copy the content of the temp buffer into the iovecs */
+ for( i_index = 0, i_blocks_total = i_blocks_read;
+ i_blocks_total > 0;
+ i_index++ )
+ {+ memcpy( p_iovec[i_index].iov_base,
+ dvdcss->p_readv_buffer + (i_blocks_read - i_blocks_total)
+ * DVDCSS_BLOCK_SIZE,
+ p_iovec[i_index].iov_len );
+ /* if we read less blocks than asked, we'll just end up copying
+ * garbage, this isn't an issue as we return the number of
+ * blocks actually read */
+ i_blocks_total -= ( p_iovec[i_index].iov_len / DVDCSS_BLOCK_SIZE );
+ }
+
+ return i_blocks_read;
+}
+
+static int aspi_read_internal( int i_fd, void *p_data, int i_blocks )
+{HANDLE hEvent;
struct SRB_ExecSCSICmd ssc;
struct w32_aspidev *fd = (struct w32_aspidev *) i_fd;
@@ -640,9 +665,9 @@
ResetEvent( hEvent );
fd->lpSendCommand( (void*) &ssc );
- /* transfer the next 64kb (_win32_dvdcss_aread is called recursively)
+ /* transfer the next 64kb (aspi_read_internal is called recursively)
* We need to check the status of the read on return */
- if( _win32_dvdcss_aread( i_fd, (u8*) p_data + 32 * DVDCSS_BLOCK_SIZE,
+ if( aspi_read_internal( i_fd, (u8*) p_data + 32 * DVDCSS_BLOCK_SIZE,
i_blocks - 32) < 0 )
{return -1;
@@ -676,6 +701,5 @@
return i_blocks;
}
-
#endif
--- a/src/device.h
+++ b/src/device.h
@@ -2,7 +2,7 @@
* device.h: DVD device access
*****************************************************************************
* Copyright (C) 1998-2002 VideoLAN
- * $Id: device.h,v 1.3 2002/08/10 17:42:09 sam Exp $
+ * $Id: device.h,v 1.4 2002/10/18 18:48:59 sam Exp $
*
* Authors: St�phane Borel <stef@via.ecp.fr>
* Samuel Hocevar <sam@zoy.org>
@@ -46,12 +46,11 @@
int _dvdcss_use_ioctls ( dvdcss_t );
int _dvdcss_open ( dvdcss_t );
int _dvdcss_close ( dvdcss_t );
-int _dvdcss_readv ( dvdcss_t, struct iovec *, int );
/*****************************************************************************
* Device reading prototypes, raw-device specific
*****************************************************************************/
#ifndef WIN32
-int _dvdcss_raw_open ( dvdcss_t, char * );
+int _dvdcss_raw_open ( dvdcss_t, char const * );
#endif
--- a/src/libdvdcss.c
+++ b/src/libdvdcss.c
@@ -5,7 +5,7 @@
* H�kan Hjort <d95hjort@dtek.chalmers.se>
*
* Copyright (C) 1998-2002 VideoLAN
- * $Id: libdvdcss.c,v 1.18 2002/08/10 20:21:54 sam Exp $
+ * $Id: libdvdcss.c,v 1.19 2002/10/18 18:48:59 sam Exp $
*
* 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
@@ -318,7 +318,7 @@
}
}
- return _dvdcss_seek( dvdcss, i_blocks );
+ return dvdcss->pf_seek( dvdcss, i_blocks );
}
/**
@@ -350,7 +350,7 @@
{int i_ret, i_index;
- i_ret = _dvdcss_read( dvdcss, p_buffer, i_blocks );
+ i_ret = dvdcss->pf_read( dvdcss, p_buffer, i_blocks );
if( i_ret <= 0
|| !dvdcss->b_scrambled
@@ -426,7 +426,7 @@
void *iov_base;
size_t iov_len;
- i_ret = _dvdcss_readv( dvdcss, _p_iovec, i_blocks );
+ i_ret = dvdcss->pf_readv( dvdcss, _p_iovec, i_blocks );
if( i_ret <= 0
|| !dvdcss->b_scrambled
--- a/src/libdvdcss.h
+++ b/src/libdvdcss.h
@@ -2,7 +2,7 @@
* private.h: private DVD reading library data
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
- * $Id: libdvdcss.h,v 1.4 2002/08/10 14:27:26 sam Exp $
+ * $Id: libdvdcss.h,v 1.5 2002/10/18 18:48:59 sam Exp $
*
* Authors: St�phane Borel <stef@via.ecp.fr>
* Samuel Hocevar <sam@zoy.org>
@@ -22,6 +22,8 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
+struct iovec;
+
/*****************************************************************************
* The libdvdcss structure
*****************************************************************************/
@@ -30,8 +32,14 @@
/* File descriptor */
char * psz_device;
int i_fd;
+ int i_read_fd;
int i_seekpos;
+ /* File handling */
+ int ( * pf_seek ) ( dvdcss_t, int );
+ int ( * pf_read ) ( dvdcss_t, void *, int );
+ int ( * pf_readv ) ( dvdcss_t, struct iovec *, int );
+
/* Decryption stuff */
int i_method;
css_t css;
@@ -45,6 +53,7 @@
int b_debug;
#ifdef WIN32
+ int b_file;
char * p_readv_buffer;
int i_readv_buf_size;
#endif
@@ -51,7 +60,6 @@
#ifndef WIN32
int i_raw_fd;
- int i_read_fd;
#endif
};
@@ -65,9 +73,6 @@
/*****************************************************************************
* Functions used across the library
*****************************************************************************/
-int _dvdcss_seek ( dvdcss_t, int );
-int _dvdcss_read ( dvdcss_t, void *, int );
-
void _dvdcss_error ( dvdcss_t, char * );
void _dvdcss_debug ( dvdcss_t, char * );