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vlc/modules/access/eyetv.m

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/*****************************************************************************
* eyetv.c : Access module to connect to our plugin running within EyeTV
*****************************************************************************
* Copyright (C) 2006-2007 the VideoLAN team
* $Id$
*
* Author: Felix Kühne <fkuehne at videolan dot org>
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_access.h>
#include <vlc_network.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#import <Foundation/Foundation.h>
#define MTU 65535
/* TODO:
* watch for PluginQuit or DeviceRemoved to stop output to VLC's core then */
/*****************************************************************************
* Module descriptior
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define CHANNEL_TEXT N_("Channel number")
#define CHANNEL_LONGTEXT N_( \
"EyeTV program number, or use 0 for last channel, " \
"-1 for S-Video input, -2 for Composite input" )
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
"Caching value for EyeTV captures. This " \
"value should be set in milliseconds." )
vlc_module_begin ()
set_shortname( "EyeTV" )
set_description( N_("EyeTV access module") )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACCESS )
add_integer( "eyetv-channel", 0, NULL,
CHANNEL_TEXT, CHANNEL_LONGTEXT, false );
set_capability( "access", 0 )
add_shortcut( "eyetv" )
set_callbacks( Open, Close )
add_integer( "eyetv-caching", DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, true);
vlc_module_end ()
/*****************************************************************************
* Access: local prototypes
*****************************************************************************/
struct access_sys_t
{
int eyetvSock;
int i_pts_delay;
};
static block_t *BlockRead( access_t *);
static int Control( access_t *, int, va_list );
static void selectChannel( vlc_object_t *p_this, int theChannelNum )
{
NSAppleScript *script;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
switch( theChannelNum )
{
case -2: // Composite
script = [[NSAppleScript alloc] initWithSource:
@"tell application \"EyeTV\"\n"
" input_change input source composite video input\n"
" volume_change level 0\n"
" show player_window\n"
" tell application \"System Events\" to set visible of process \"EyeTV\" to false\n"
"end tell"];
break;
case -1: // S-Video
script = [[NSAppleScript alloc] initWithSource:
@"tell application \"EyeTV\"\n"
" input_change input source S video input\n"
" volume_change level 0\n"
" show player_window\n"
" tell application \"System Events\" to set visible of process \"EyeTV\" to false\n"
"end tell"];
break;
case 0: // Last
script = [[NSAppleScript alloc] initWithSource:
@"tell application \"EyeTV\"\n"
" volume_change level 0\n"
" show player_window\n"
" tell application \"System Events\" to set visible of process \"EyeTV\" to false\n"
"end tell"];
break;
default:
if( theChannelNum > 0 )
{
NSString *channel_change = [NSString stringWithFormat:
@"tell application \"EyeTV\"\n"
" channel_change channel number %d\n"
" volume_change level 0\n"
" show player_window\n"
" tell application \"System Events\" to set visible of process \"EyeTV\" to false\n"
"end tell", theChannelNum];
script = [[NSAppleScript alloc] initWithSource:channel_change];
}
else
return;
}
NSDictionary *errorDict;
NSAppleEventDescriptor *descriptor = [script executeAndReturnError:&errorDict];
if( nil == descriptor )
{
NSString *errorString = [errorDict objectForKey:NSAppleScriptErrorMessage];
msg_Err( p_this, "EyeTV source change failed with error status '%s'", [errorString UTF8String] );
}
[script release];
[pool release];
}
/*****************************************************************************
* Open: sets up the module and its threads
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
access_t *p_access = (access_t *)p_this;
access_sys_t *p_sys;
struct sockaddr_un publicAddr, peerAddr;
int publicSock;
/* Init p_access */
access_InitFields( p_access );
ACCESS_SET_CALLBACKS( NULL, BlockRead, Control, NULL );
p_sys = p_access->p_sys = calloc( 1, sizeof( access_sys_t ) );
if( !p_sys )
return VLC_ENOMEM;
p_sys->i_pts_delay = var_CreateGetInteger( p_access, "eyetv-caching" );
int val = var_CreateGetInteger( p_access, "eyetv-channel" );
msg_Dbg( p_access, "coming up" );
selectChannel( p_this, val );
/* socket */
memset(&publicAddr, 0, sizeof(publicAddr));
publicAddr.sun_family = AF_UNIX;
strncpy(publicAddr.sun_path, "/tmp/.vlc-eyetv-bridge", sizeof(publicAddr.sun_path)-1);
/* remove previous public path if it wasn't cleanly removed */
if( (0 != unlink(publicAddr.sun_path)) && (ENOENT != errno) )
{
msg_Err( p_access, "local socket path is not usable (errno=%d)", errno );
free( p_sys );
return VLC_EGENERIC;
}
publicSock = socket(AF_UNIX, SOCK_STREAM, 0);
if( publicSock == -1 )
{
msg_Err( p_access, "create local socket failed (errno=%d)", errno );
free( p_sys );
return VLC_EGENERIC;
}
if( bind(publicSock, (struct sockaddr *)&publicAddr, sizeof(struct sockaddr_un)) == -1 )
{
msg_Err( p_access, "bind local socket failed (errno=%d)", errno );
close( publicSock );
free( p_sys );
return VLC_EGENERIC;
}
/* we are not expecting more than one connection */
if( listen(publicSock, 1) == -1 )
{
msg_Err( p_access, "cannot accept connection (errno=%d)", errno );
close( publicSock );
free( p_sys );
return VLC_EGENERIC;
}
else
{
socklen_t peerSockLen = sizeof(struct sockaddr_un);
int peerSock;
/* tell the EyeTV plugin to open start sending */
CFNotificationCenterPostNotification( CFNotificationCenterGetDistributedCenter (),
CFSTR("VLCAccessStartDataSending"),
CFSTR("VLCEyeTVSupport"),
/*userInfo*/ NULL,
TRUE );
msg_Dbg( p_access, "plugin notified" );
peerSock = accept(publicSock, (struct sockaddr *)&peerAddr, &peerSockLen);
if( peerSock == -1 )
{
msg_Err( p_access, "cannot wait for connection (errno=%d)", errno );
close( publicSock );
free( p_sys );
return VLC_EGENERIC;
}
msg_Dbg( p_access, "plugin connected" );
p_sys->eyetvSock = peerSock;
/* remove public access */
close(publicSock);
unlink(publicAddr.sun_path);
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: closes msg-port, free resources
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
access_t *p_access = (access_t *)p_this;
access_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "closing" );
/* tell the EyeTV plugin to close its msg port and stop sending */
CFNotificationCenterPostNotification( CFNotificationCenterGetDistributedCenter (),
CFSTR("VLCAccessStopDataSending"),
CFSTR("VLCEyeTVSupport"),
/*userInfo*/ NULL,
TRUE );
msg_Dbg( p_access, "plugin notified" );
close(p_sys->eyetvSock);
msg_Dbg( p_access, "msg port closed and freed" );
free( p_sys );
}
/*****************************************************************************
* BlockRead: forwarding data from EyeTV plugin which was received above
*****************************************************************************/
static block_t *BlockRead( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
block_t *p_block;
ssize_t len;
if( p_access->info.b_eof )
return NULL;
/* Read data */
p_block = block_New( p_access, MTU );
len = net_Read( p_access, p_sys->eyetvSock, NULL,
p_block->p_buffer, MTU, false );
if( len < 0 )
{
block_Release( p_block );
return NULL;
}
return block_Realloc( p_block, 0, p_block->i_buffer = len );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( access_t *p_access, int i_query, va_list args )
{
bool *pb_bool;
int *pi_int;
int64_t *pi_64;
access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
switch( i_query )
{
case ACCESS_CAN_SEEK:
case ACCESS_CAN_FASTSEEK:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
case ACCESS_CAN_PAUSE:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
case ACCESS_CAN_CONTROL_PACE:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
/* */
case ACCESS_GET_MTU:
pi_int = (int*)va_arg( args, int * );
*pi_int = MTU;
break;
case ACCESS_GET_PTS_DELAY:
pi_64 = (int64_t*)va_arg( args, int64_t * );
*pi_64 = (int64_t) p_sys->i_pts_delay * 1000;
break;
case ACCESS_SET_PAUSE_STATE:
case ACCESS_GET_TITLE_INFO:
case ACCESS_SET_TITLE:
case ACCESS_SET_SEEKPOINT:
case ACCESS_SET_PRIVATE_ID_STATE:
case ACCESS_GET_CONTENT_TYPE:
return VLC_EGENERIC;
default:
msg_Warn( p_access, "unimplemented query in control" );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
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