/*****************************************************************************
 * wizard.m: MacOS X Streaming Wizard
 *****************************************************************************
 * Copyright (C) 2005 the VideoLAN team
 * $Id: wizard.m 13451 2005-11-29 14:08:47Z fkuehne $
 *
 * Authors: Felix Kühne <fkuehne@users.sf.net>
 *
 * 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.
 *****************************************************************************/


/*****************************************************************************
 * Note: this code is partially based upon ../wxwidgets/wizard.cpp and
 *         ../wxwidgets/streamdata.h; both written by Clément Stenac.
 *****************************************************************************/


/*****************************************************************************
 * Preamble
 *****************************************************************************/
#import "wizard.h"
#import "intf.h"
#import "network.h"
#import "playlist.h"

/*****************************************************************************
 * VLCWizard implementation
 *****************************************************************************/

@implementation VLCWizard

static VLCWizard *_o_sharedInstance = nil;

+ (VLCWizard *)sharedInstance
{
    return _o_sharedInstance ? _o_sharedInstance : [[self alloc] init];
}

- (id)init
{
    if (_o_sharedInstance) {
        [self dealloc];
    } else {
        _o_sharedInstance = [super init];
    }

    return _o_sharedInstance;
}

- (void)dealloc
{
    [o_userSelections release];
    [o_videoCodecs release];
    [o_audioCodecs release];
    [o_encapFormats release];
    [super dealloc];
}

- (void)awakeFromNib
{
    /* some minor cleanup */
    [o_t2_tbl_plst setEnabled:NO];
    [o_wizardhelp_window setExcludedFromWindowsMenu:YES];
    o_userSelections = [[NSMutableDictionary alloc] init];
    [o_btn_backward setEnabled:NO];

    /* add audio-bitrates for transcoding */
    NSArray * audioBitratesArray;
    audioBitratesArray = [NSArray arrayWithObjects: @"512", @"256", @"192", \
        @"128", @"64", @"32", @"16", nil ];
    [o_t4_pop_audioBitrate removeAllItems];
    [o_t4_pop_audioBitrate addItemsWithTitles: audioBitratesArray];
    [o_t4_pop_audioBitrate selectItemWithTitle: @"192"];

    /* add video-bitrates for transcoding */
    NSArray * videoBitratesArray;
    videoBitratesArray = [NSArray arrayWithObjects: @"3072", @"2048", @"1024", \
        @"768", @"512", @"256", @"192", @"128", @"64", @"32", @"16", nil ];
    [o_t4_pop_videoBitrate removeAllItems];
    [o_t4_pop_videoBitrate addItemsWithTitles: videoBitratesArray];
    [o_t4_pop_videoBitrate selectItemWithTitle: @"1024"];

    /* fill 2 global arrays with arrays containing all codec-related information
     * - one array per codec named by its short name to define the encap-compability,
     *     cmd-names, real names, more info in the order: realName, shortName,
     *     moreInfo, encaps */
    NSArray * o_mp1v;
    NSArray * o_mp2v;
    NSArray * o_mp4v;
    NSArray * o_div1;
    NSArray * o_div2;
    NSArray * o_div3;
    NSArray * o_h263;
    NSArray * o_h264;
    NSArray * o_wmv1;
    NSArray * o_wmv2;
    NSArray * o_mjpg;
    NSArray * o_theo;
    NSArray * o_dummyVid;
    o_mp1v = [NSArray arrayWithObjects: @"MPEG-1 Video", @"mp1v", \
        _NS("MPEG-1 Video codec (usable with MPEG PS, MPEG TS, MPEG1, OGG " \
        "and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_OGG", @"MUX_RAW", \
        @"NO", @"NO", @"NO", @"NO", nil];
    o_mp2v = [NSArray arrayWithObjects: @"MPEG-2 Video", @"mp2v", \
        _NS("MPEG-2 Video codec (usable with MPEG PS, MPEG TS, MPEG1, OGG " \
        "and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_OGG", @"MUX_RAW", \
        @"NO", @"NO", @"NO", @"NO", nil];
    o_mp4v = [NSArray arrayWithObjects: @"MPEG-4 Video", @"mp4v", \
        _NS("MPEG-4 Video codec (useable with MPEG PS, MPEG TS, MPEG1, ASF, " \
        "MP4, OGG and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", \
        @"MUX_MP4", @"MUX_OGG", @"MUX_RAW", @"NO", @"NO", nil];
    o_div1 = [NSArray arrayWithObjects: @"DIVX 1", @"DIV1", \
        _NS("DivX first version (useable with MPEG TS, MPEG1, ASF and OGG)"), \
        @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", @"NO", @"NO", @"NO", \
        @"NO", @"NO", nil];
    o_div2 = [NSArray arrayWithObjects: @"DIVX 2", @"DIV2", \
        _NS("DivX second version (useable with MPEG TS, MPEG1, ASF and OGG)"), \
        @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", @"NO", @"NO", @"NO", \
        @"NO", @"NO", nil];
    o_div3 = [NSArray arrayWithObjects: @"DIVX 3", @"DIV3", \
        _NS("DivX third version (useable with MPEG TS, MPEG1, ASF and OGG)"), \
        @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", @"NO", @"NO", @"NO", \
        @"NO", @"NO", nil];
    o_h263 = [NSArray arrayWithObjects: @"H.263", @"h263", \
        _NS("H263 is a video codec optimized for videoconference " \
        "(low rates, useable with MPEG TS)"), @"MUX_TS", @"NO", @"NO", @"NO", \
        @"NO", @"NO", @"NO", @"NO", @"NO", nil];
    o_h264 = [NSArray arrayWithObjects: @"H.264", @"h264", \
        _NS("H264 is a new video codec (useable with MPEG TS and MP4)"), \
        @"MUX_TS", @"MUX_MP4", @"NO", @"NO", @"NO", @"NO", @"NO", @"NO", \
        @"NO", nil];
    o_wmv1 = [NSArray arrayWithObjects: @"WMV 1", @"WMV1", \
        _NS("WMV (Windows Media Video) 1 (useable with MPEG TS, MPEG1, ASF and " \
        "OGG)"), @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", @"NO", @"NO", \
        @"NO", @"NO", @"NO", nil];
    o_wmv2 = [NSArray arrayWithObjects: @"WMV 2", @"WMV2", \
        _NS("WMV (Windows Media Video) 2 (useable with MPEG TS, MPEG1, ASF and " \
        "OGG)"), @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", @"NO", @"NO", \
        @"NO", @"NO", @"NO", nil];
    o_mjpg = [NSArray arrayWithObjects: @"MJPEG", @"MJPG", \
        _NS("MJPEG consists of a series of JPEG pictures (useable with MPEG TS," \
        " MPEG1, ASF and OGG)"), @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", \
        @"NO", @"NO", @"NO", @"NO", @"NO", nil];
    o_theo = [NSArray arrayWithObjects: @"Theora", @"theo", \
        _NS("Theora is a free general-purpose codec (useable with MPEG TS)"), \
        @"MUX_TS", @"NO", @"NO", @"NO", @"NO", @"NO", @"NO", @"NO", @"NO", nil];
    o_dummyVid = [NSArray arrayWithObjects: @"Dummy", @"dummy", \
        _NS("Dummy codec (do not transcode, useable with all encapsulation " \
        "formats)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_MP4", \
        @"MUX_OGG", @"MUX_WAV", @"MUX_RAW", @"MUX_MOV", nil];
    o_videoCodecs = [[NSArray alloc] initWithObjects: o_mp1v, o_mp2v, o_mp4v, \
        o_div1, o_div2, o_div3, o_h263, o_h264, o_wmv1, o_wmv2, o_mjpg, o_theo, \
        o_dummyVid, nil];
    

    NSArray * o_mpga;
    NSArray * o_mp3;
    NSArray * o_mp4a;
    NSArray * o_a52;
    NSArray * o_vorb;
    NSArray * o_flac;
    NSArray * o_spx;
    NSArray * o_s16l;
    NSArray * o_fl32;
    NSArray * o_dummyAud;
    o_mpga = [NSArray arrayWithObjects: @"MPEG Audio", @"mpga", \
        _NS("The standard MPEG audio (1/2) format (useable with MPEG PS, MPEG TS, " \
        "MPEG1, ASF, OGG and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", \
        @"MUX_ASF", @"MUX_OGG", @"MUX_RAW", @"-1", @"-1", @"-1", nil];
    o_mp3 = [NSArray arrayWithObjects: @"MP3", @"mp3", \
        _NS("MPEG Audio Layer 3 (useable with MPEG PS, MPEG TS, MPEG1, ASF, OGG " \
        "and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", \
        @"MUX_RAW", @"-1", @"-1", @"-1", nil];
    o_mp4a = [NSArray arrayWithObjects: @"MPEG 4 Audio", @"mp4a", \
        _NS("Audio format for MPEG4 (useable with MPEG TS and MPEG4)"), @"MUX_TS", \
        @"MUX_MP4", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", nil];
    o_a52 = [NSArray arrayWithObjects: @"A/52", @"a52", 
        _NS("DVD audio format (useable with MPEG PS, MPEG TS, MPEG1, ASF, OGG " \
        "and RAW)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_OGG", \
        @"MUX_RAW", @"-1", @"-1", @"-1", nil];
    o_vorb = [NSArray arrayWithObjects: @"Vorbis", @"vorb", \
        _NS("Vorbis is a free audio codec (useable with OGG)"), @"MUX_OGG", \
        @"-1",  @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", nil];
    o_flac = [NSArray arrayWithObjects: @"FLAC", @"flac", \
        _NS("FLAC is a lossless audio codec (useable with OGG and RAW)"), \
        @"MUX_OGG", @"MUX_RAW", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", \
        @"-1", nil];
    o_spx = [NSArray arrayWithObjects: @"Speex", @"spx", \
        _NS("A free audio codec dedicated to compression of voice (useable " \
        "with OGG"), @"MUX_OGG", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", \
        @"-1", @"-1", nil];
    o_s16l = [NSArray arrayWithObjects: @"Uncompressed, integer", @"s16l", \
        _NS("Uncompressed audio samples (useable with WAV)"), @"MUX_WAV", \
        @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", nil];
    o_fl32 = [NSArray arrayWithObjects: @"Uncompressed, floating", @"fl32", \
        _NS("Uncompressed audio samples (useable with WAV)"), @"MUX_WAV", \
        @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", @"-1", nil];
    o_dummyAud = [NSArray arrayWithObjects: @"Dummy", @"dummy", \
        _NS("Dummy codec (do not transcode, useable with all encapsulation " \
        "formats)"), @"MUX_PS", @"MUX_TS", @"MUX_MPEG", @"MUX_ASF", @"MUX_MP4", \
        @"MUX_OGG", @"MUX_RAW", @"MUX_MOV", @"MUX_WAV", nil];
    o_audioCodecs = [[NSArray alloc] initWithObjects: o_mpga, o_mp3, o_mp4a, \
        o_a52, o_vorb, o_flac, o_spx, o_s16l, o_fl32, o_dummyAud, nil];


    /* fill another global array with all information about the encap-formats
     * note that the order of the formats inside the g. array is the same as on
     * the encap-tab */
    NSArray * o_ps;
    NSArray * o_ts;
    NSArray * o_mpeg;
    NSArray * o_ogg;
    NSArray * o_raw;
    NSArray * o_asf;
    NSArray * o_avi;
    NSArray * o_mp4;
    NSArray * o_mov;
    NSArray * o_wav;
    NSArray * o_asfh;
    o_ps = [NSArray arrayWithObjects: @"ps", @"MPEG PS", \
        _NS("MPEG Program Stream"), @"mpg", nil];
    o_ts = [NSArray arrayWithObjects: @"ts", @"MPEG TS", \
        _NS("MPEG Transport Stream"), nil];
    o_mpeg = [NSArray arrayWithObjects: @"ps", @"MPEG 1", \
        _NS("MPEG 1 Format"), @"mpg", nil];
    o_ogg = [NSArray arrayWithObjects: @"ogg", @"OGG", @"OGG", nil];
    o_raw = [NSArray arrayWithObjects: @"raw", @"RAW", @"RAW", nil];
    o_asf = [NSArray arrayWithObjects: @"asf", @"ASF", @"ASF", nil];
    o_avi = [NSArray arrayWithObjects: @"avi", @"AVI", @"AVI", nil];
    o_mp4 = [NSArray arrayWithObjects: @"mp4", @"MP4", @"MPEG4", nil];
    o_mov = [NSArray arrayWithObjects: @"mov", @"MOV", @"MOV", nil];
    o_wav = [NSArray arrayWithObjects: @"wav", @"WAV", @"WAV", nil];
    o_asfh = [NSArray arrayWithObjects: @"asfh", @"ASFH", @"ASFH", nil];
    o_encapFormats = [[NSArray alloc] initWithObjects: o_ps, o_ts, o_mpeg, \
        o_ogg, o_raw, o_asf, o_avi, o_mp4, o_mov, o_wav, o_asfh, nil];

    /* yet another array on streaming methods including help texts */
    NSArray * o_http;
    NSArray * o_mms;
    NSArray * o_udp_uni;
    NSArray * o_udp_multi;
    o_http = [NSArray arrayWithObjects: @"http", @"HTTP", _NS("Enter the local " \
        "addresses you want to listen to. Do not enter anything if you want to " \
        "listen to all adresses or if you don't understand. This is generally " \
        "the best thing to do. Other computers can then access the stream at " \
        "http://yourip:8080 by default.") , _NS("Use this to stream to several " \
        "computers. This method is less efficient, as the server needs to send " \
        "the stream several times."), nil];
    o_mms = [NSArray arrayWithObjects: @"mmsh", @"MMS", _NS("Enter the local " \
        "addresses you want to listen to. Do not enter anything if you want to " \
        "listen to all adresses or if you don't understand. This is generally " \
        "the best thing to do. Other computers can then access the stream at " \
        "mms://yourip:8080 by default."), _NS("Use this to stream to several " \
        "computers using the Microsoft MMS protocol. This protocol is used as " \
        "transport method by many Microsoft's softwares. Note that only a " \
        "small part of the MMS protocol is supported (MMS encapsulated in " \
        "HTTP)." ), nil];
    o_udp_uni = [NSArray arrayWithObjects: @"udp", @"UDP-Unicast", _NS("Enter " \
        "the address of the computer to stream to."), _NS("Use this to stream " \
        "to a single computer."), nil];
    o_udp_multi = [NSArray arrayWithObjects: @"udp", @"UDP-Multicast", _NS("Enter " \
        "the multicast address to stream to in this field. This must be an IP " \
        "address between 224.0.0.0 and 239.255.255.255. For a private use, " \
        "enter an address beginning with 239.255."), _NS("Use this to stream " \
        "to a dynamic group of computers on a multicast-enabled network. This " \
        "is the most efficient method to stream to several computers, but it " \
        "does not work over Internet."), nil];
    o_strmgMthds = [[NSArray alloc] initWithObjects: o_http, o_mms, \
        o_udp_uni, o_udp_multi, nil];
}

- (void)showWizard
{
    /* just present the window to the user */
    [o_tab_pageHolder selectFirstTabViewItem:self];

    [o_wizard_window center];
    [o_wizard_window displayIfNeeded];
    [o_wizard_window makeKeyAndOrderFront:nil];
}

- (void)resetWizard
{
    /* reset the wizard-window to its default values */

    [o_userSelections removeAllObjects];
    [o_t1_matrix_strmgOrTrnscd selectCellAtRow:0 column:0];
    [[o_t1_matrix_strmgOrTrnscd cellAtRow:1 column:0] setState: NSOffState];
    [o_btn_forward setTitle: _NS("Next")];

    /* "Input" */
    [o_t2_fld_pathToNewStrm setStringValue: @""];
    [o_t2_ckb_enblPartExtrct setState: NSOffState];
    [self t2_enableExtract:nil];
    [o_t2_matrix_inputSourceType selectCellAtRow:0 column:0];
    [[o_t2_matrix_inputSourceType cellAtRow:1 column:0] setState: NSOffState];
    [o_t2_fld_pathToNewStrm setEnabled:YES];
    [o_t2_btn_chooseFile setEnabled:YES];
    [o_t2_tbl_plst setEnabled:NO];

    /* "Streaming 1" */
    [o_t3_fld_address setStringValue: @""];
    [o_t3_matrix_stmgMhd selectCellAtRow:0 column:0];
    [[o_t3_matrix_stmgMhd cellAtRow:0 column:1] setState: NSOffState];
    [[o_t3_matrix_stmgMhd cellAtRow:1 column:1] setState: NSOffState];
    [[o_t3_matrix_stmgMhd cellAtRow:1 column:2] setState: NSOffState];

    /* "Transcode 1" */
    [o_t4_ckb_audio setState: NSOffState];
    [o_t4_ckb_video setState: NSOffState];
    [self t4_enblVidTrnscd:nil];
    [self t4_enblAudTrnscd:nil];

    /* "Streaming 2" */
    [o_t6_fld_ttl setStringValue: @"1"];
    [o_t6_ckb_sap setState: NSOffState];
    [self t6_enblSapAnnce:nil];

    /* "Transcode 2" */
    [o_t7_fld_filePath setStringValue: @""];
}

- (void)initStrings
{
    /* localise all strings to the users lang */
    /* method is called from intf.m (in method showWizard) */

    /* general items */
    [o_btn_backward setTitle: _NS("Back")];
    [o_btn_cancel setTitle: _NS("Cancel")];
    [o_btn_forward setTitle: _NS("Next")];
    [o_wizard_window setTitle: _NS("Streaming/Transcoding Wizard")];

    /* page one ("Hello") */
    [o_t1_txt_title setStringValue: _NS("Streaming/Transcoding Wizard")];
    [o_t1_txt_text setStringValue: _NS("This wizard helps you to stream, " \
        "transcode or save a stream.")];
    [o_t1_btn_mrInfo_strmg setTitle: _NS("More Info")];
    [o_t1_btn_mrInfo_trnscd setTitle: _NS("More Info")];
    [o_t1_txt_notice setStringValue: _NS("This wizard only gives access to " \
        "a small subset of VLC's streaming and transcoding capabilities. " \
        "Use the Open and Stream Output dialogs to get all of them.")];
    [[o_t1_matrix_strmgOrTrnscd cellAtRow:0 column:0] setTitle: _NS("Stream " \
        "to network")];
    [[o_t1_matrix_strmgOrTrnscd cellAtRow:1 column:0] setTitle: _NS("" \
        "Transcode/Save to file")];

    /* page two ("Input") */
    [o_t2_title setStringValue: _NS("Choose input")];
    [o_t2_text setStringValue: _NS("Choose here your input stream.")];
    [[o_t2_matrix_inputSourceType cellAtRow:0 column:0] setTitle:  \
        _NS("Select a stream")];
    [[o_t2_matrix_inputSourceType cellAtRow:1 column:0] setTitle: \
        _NS("Existing playlist item")];
    [o_t2_btn_chooseFile setTitle: _NS("Choose...")];
    [[[o_t2_tbl_plst tableColumnWithIdentifier:@"1"] headerCell] \
        setStringValue: _NS("Title")];
    [[[o_t2_tbl_plst tableColumnWithIdentifier:@"2"] headerCell] \
        setStringValue: _NS("Author")];
    [o_t2_box_prtExtrct setTitle: _NS("Partial Extract")];
    [o_t2_ckb_enblPartExtrct setTitle: _NS("Enable")];
    [o_t2_ckb_enblPartExtrct setToolTip: _NS("Use this to read only a part of "\
        "the stream. You must be able to control the incoming stream " \
        "(for example, a file or a disc, but not an UDP network stream.) " \
        "Enter the starting and ending times (in seconds).")];
    [o_t2_txt_prtExtrctFrom setStringValue: _NS("From")];
    [o_t2_txt_prtExtrctTo setStringValue: _NS("To")];

    /* page three ("Streaming 1") */
    [o_t3_txt_title setStringValue: _NS("Streaming")];
    [o_t3_txt_text setStringValue: _NS("In this page, you will select how " \
        "your input stream will be sent.")];
    [o_t3_box_dest setTitle: _NS("Destination")];
    [o_t3_box_strmgMthd setTitle: _NS("Streaming method")];
    [o_t3_txt_destInfo setStringValue: _NS("Enter the address of the computer " \
        "to stream to.")];
    [[o_t3_matrix_stmgMhd cellAtRow:0 column:0] setTitle: _NS("UDP Unicast")];
    [[o_t3_matrix_stmgMhd cellAtRow:0 column:1] setTitle: _NS("UDP Multicast")];
    [o_t3_txt_strgMthdInfo setStringValue: _NS("Use this to stream to a single " \
        "computer.")];

    /* page four ("Transcode 1") */
    [o_t4_title setStringValue: _NS("Transcode")];
    [o_t4_text setStringValue: _NS("If you want to change the compression " \
        "format of the audio or video tracks, fill in this page. (If you only " \
        "want to change the container format, proceed to next page.)")];
    [o_t4_box_audio setTitle: _NS("Audio")];
    [o_t4_box_video setTitle: _NS("Video")];
    [o_t4_ckb_audio setTitle: _NS("Transcode audio")];
    [o_t4_ckb_video setTitle: _NS("Transcode video")];
    [o_t4_txt_videoBitrate setStringValue: _NS("Bitrate (kb/s)")];
    [o_t4_txt_videoCodec setStringValue: _NS("Codec")];
    [o_t4_txt_hintAudio setStringValue: _NS("If your stream has audio and you " \
        "want to transcode it, enable this.")];
    [o_t4_txt_hintVideo setStringValue: _NS("If your stream has video and you " \
        "want to transcode it, enable this.")];

    /* page five ("Encap") */
    [o_t5_title setStringValue: _NS("Encapsulation format")];
    [o_t5_text setStringValue: _NS("In this page, you will select how the " \
        "stream will be encapsulated. Depending on the choices you made, all " \
                     "formats won't be available.")];

    /* page six ("Streaming 2") */
    [o_t6_title setStringValue: _NS("Additional streaming options")];
    [o_t6_text setStringValue: _NS("In this page, you will define a few " \
                              "additional parameters for your stream.")];
    [o_t6_txt_ttl setStringValue: _NS("Time-To-Live (TTL)")];
    [o_t6_btn_mrInfo_ttl setTitle: _NS("More Info")];
    [o_t6_ckb_sap setTitle: _NS("SAP Announce")];
    [o_t6_btn_mrInfo_sap setTitle: _NS("More Info")];
    [o_t6_ckb_local setTitle: _NS("Local playback")];
    [o_t6_btn_mrInfo_local setTitle: _NS("More Info")];

    /* page seven ("Transcode 2") */
    [o_t7_title setStringValue: _NS("Additional transcode options")];
    [o_t7_text setStringValue: _NS("In this page, you will define a few " \
                              "additional parameters for your transcoding.")];
    [o_t7_txt_saveFileTo setStringValue: _NS("Select the file to save to")];
    [o_t7_btn_chooseFile setTitle: _NS("Choose...")];
    [o_t7_ckb_local setTitle: _NS("Local playback")];
    [o_t7_btn_mrInfo_local setTitle: _NS("More Info")];

    /* page eight ("Summary") */
    [o_t8_txt_text setStringValue: _NS("This page lists all your selections. " \
        "Click \"Finish\" to start your streaming or transcoding.")];
    [o_t8_txt_title setStringValue: _NS("Summary")];
    [o_t8_txt_destination setStringValue: [_NS("Destination") \
        stringByAppendingString: @":"]];
    [o_t8_txt_encapFormat setStringValue: [_NS("Encap. format") \
        stringByAppendingString: @":"]];
    [o_t8_txt_inputStream setStringValue: [_NS("Input stream") \
        stringByAppendingString: @":"]];
    [o_t8_txt_partExtract setStringValue: [_NS("Partial Extract") \
        stringByAppendingString: @":"]];
    [o_t8_txt_sap setStringValue: [_NS("SAP Announce") \
        stringByAppendingString: @":"]];
    [o_t8_txt_saveFileTo setStringValue: [_NS("Save file to") \
        stringByAppendingString: @":"]];
    [o_t8_txt_strmgMthd setStringValue: [_NS("Streaming method") \
        stringByAppendingString: @":"]];
    [o_t8_txt_trnscdAudio setStringValue: [_NS("Transcode audio") \
        stringByAppendingString: @":"]];
    [o_t8_txt_trnscdVideo setStringValue: [_NS("Transcode video") \
        stringByAppendingString: @":"]];
    [o_t8_txt_local setStringValue: [_NS("Local playback") \
        stringByAppendingString: @":"]];

    /* wizard help window */
    [o_wh_btn_okay setTitle: _NS("OK")];
}

- (void)initWithExtractValuesFrom: (NSString *)from to: (NSString *)to \
    ofItem: (NSString *)item
{
    [self resetWizard];
    msg_Dbg(VLCIntf, "wizard was reseted");
    [o_userSelections setObject:@"trnscd" forKey:@"trnscdOrStrmg"];
    [o_btn_backward setEnabled:YES];
    [o_tab_pageHolder selectTabViewItemAtIndex:1];
    [o_t2_fld_prtExtrctFrom setStringValue: from];
    [o_t2_fld_prtExtrctTo setStringValue: to];
    [o_t2_fld_pathToNewStrm setStringValue: item];
    [o_t1_matrix_strmgOrTrnscd selectCellAtRow:1 column:0];
    [[o_t1_matrix_strmgOrTrnscd cellAtRow:0 column:0] setState: NSOffState];
    [o_t2_ckb_enblPartExtrct setState: NSOnState];
    [self t2_enableExtract: nil];
    msg_Dbg(VLCIntf, "wizard interface is set");
    
    [o_wizard_window center];
    [o_wizard_window display];
    [o_wizard_window makeKeyAndOrderFront:nil];
    msg_Dbg(VLCIntf, "wizard window displayed");
}

- (IBAction)cancelRun:(id)sender
{
    [o_wizard_window close];
}

- (id)getPlaylistWizard
{
    return o_playlist_wizard;
}

- (IBAction)nextTab:(id)sender
{
    if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: @"Hello"])
    {
        /* check whether the user wants to stream or just to transcode;
         * store information for later usage */
        NSString *o_mode;
        o_mode = [[o_t1_matrix_strmgOrTrnscd selectedCell] title];
        if( [o_mode isEqualToString: _NS("Stream to network")] )
        {
            [o_userSelections setObject:@"strmg" forKey:@"trnscdOrStrmg"];
        }else{
            [o_userSelections setObject:@"trnscd" forKey:@"trnscdOrStrmg"];
        }
        [o_btn_backward setEnabled:YES];
        [o_tab_pageHolder selectTabViewItemAtIndex:1];

        /* Fill the playlist with current playlist items */
        [o_playlist_wizard reloadOutlineView];

    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: @"Input"])
    {
        /* check whether partialExtract is enabled and store the values, if needed */
        if ([o_t2_ckb_enblPartExtrct state] == NSOnState)
        {
            [o_userSelections setObject:@"YES" forKey:@"partExtract"];
            [o_userSelections setObject:[o_t2_fld_prtExtrctFrom stringValue] \
                forKey:@"partExtractFrom"];
            [o_userSelections setObject:[o_t2_fld_prtExtrctTo stringValue] \
                forKey:@"partExtractTo"];
        }else{
            [o_userSelections setObject:@"NO" forKey:@"partExtract"];
        }

        /* check whether we use an existing pl-item or add an new one;
         * store the path or the index and set a flag.
         * complain to the user if s/he didn't provide a path */
        NSString *o_mode;
        BOOL stop;
        stop = NO;
        o_mode = [[o_t2_matrix_inputSourceType selectedCell] title];
        if( [o_mode isEqualToString: _NS("Select a stream")] )
        {
            [o_userSelections setObject:@"YES" forKey:@"newStrm"];
            if ([[o_t2_fld_pathToNewStrm stringValue] isEqualToString: @""])
            {
                /* set a flag that no file is selected */
                stop = YES;
            }
            else
            {
                [o_userSelections setObject:[o_t2_fld_pathToNewStrm stringValue] \
                    forKey:@"pathToStrm"];
            }
        }
        else
        {
            if ([o_t2_tbl_plst selectedRow] != -1)
            {
                playlist_item_t *p_item =
                                    [o_playlist_wizard selectedPlaylistItem];
                if( p_item->i_children <= 0 )
                {
                    [o_userSelections setObject: [NSString stringWithFormat:
                        @"%s", p_item->input.psz_uri] forKey:@"pathToStrm"];
                }
                else
                stop = YES;
            } else {
                /* set a flag that no item is selected */
                stop = YES;
            }
        }

        /* show either "Streaming 1" or "Transcode 1" to the user */
        if (stop == NO)
        {
            if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] \
                isEqualToString:@"strmg"])
            {
                /* we are streaming */
                [o_tab_pageHolder selectTabViewItemAtIndex:2];
            }else{
                /* we are just transcoding */

                /* rebuild the menues for the codec-selections */
                [self rebuildCodecMenus];

                [o_tab_pageHolder selectTabViewItemAtIndex:3];
            }
        } else {
            /* show a sheet that the user didn't select a file */
            NSBeginInformationalAlertSheet(_NS("No input selected"), \
                _NS("OK"), @"", @"", o_wizard_window, nil, nil, nil, nil, \
                _NS("You have selected neither a new stream nor a valid " \
                "playlist item. VLC is unable to guess, which input you " \
                "want use.\n\n Choose one before going to the next page."));
        }
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Streaming 1"])
    {
        /* rebuild the menues for the codec-selections */
        [self rebuildCodecMenus];
        
        /* check which streaming method is selected and store it */
        NSString *o_mode;
        o_mode = [[o_t3_matrix_stmgMhd selectedCell] title];
        if( [o_mode isEqualToString: @"HTTP"] )
        {
            [o_userSelections setObject:@"0" forKey:@"stmgMhd"];

            /* disable all codecs which don't support MPEG PS, MPEG TS, MPEG 1,
             * OGG, RAW or ASF */
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, integer"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, floating"];
            
        } else if ([o_mode isEqualToString: @"MMS"])
        {
            [o_userSelections setObject:@"1" forKey:@"stmgMhd"];
            
            /* disable all codecs which don't support ASF / ASFH */
            [o_t4_pop_audioCodec removeItemWithTitle:@"MPEG 4 Audio"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Vorbis"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"FLAC"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Speex"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, integer"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, floating"];
            
            [o_t4_pop_videoCodec removeItemWithTitle:@"MPEG-1 Video"];
            [o_t4_pop_videoCodec removeItemWithTitle:@"MPEG-2 Video"];
            [o_t4_pop_videoCodec removeItemWithTitle:@"H.263"];
            [o_t4_pop_videoCodec removeItemWithTitle:@"H.264"];
            [o_t4_pop_videoCodec removeItemWithTitle:@"MJPEG"];
            [o_t4_pop_videoCodec removeItemWithTitle:@"Theora"];
        } else {
            if( [o_mode isEqualToString: _NS("UDP Unicast")] )
            {
                [o_userSelections setObject:@"2" forKey:@"stmgMhd"];
            } else {
                [o_userSelections setObject:@"3" forKey:@"stmgMhd"];
            }
            
            /* disable all codecs which don't support MPEG-TS */
            [o_t4_pop_audioCodec removeItemWithTitle:@"Vorbis"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"FLAC"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Speex"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, integer"];
            [o_t4_pop_audioCodec removeItemWithTitle:@"Uncompressed, floating"];
        }

        /* store the destination and check whether is it empty */
        if([[o_userSelections objectForKey:@"stmgMhd"] intValue] >=2 )
        {
           /* empty field is valid for HTTP and MMS */
            if( [[o_t3_fld_address stringValue] isEqualToString: @""] )
            {
                /* complain to the user that "" is no valid dest. */
                NSBeginInformationalAlertSheet(_NS("No valid destination"), \
                    _NS("OK"), @"", @"", o_wizard_window, nil, nil, nil, nil, \
                    _NS("You need to enter a valid destination you want to "\
                    "stream to. Enter either a Unicast-IP or a Multicast-IP." \
                    "\n\n If you don't know what this means, have a look at " \
                    "the VLC Streaming HOWTO and the help texts in this " \
                    "window."));
            } else {
                /* FIXME: check whether the entered IP is really valid */
                [o_userSelections setObject:[o_t3_fld_address stringValue] \
                    forKey:@"stmgDest"];
                /* let's go to the transcode-1-tab */
                [o_tab_pageHolder selectTabViewItemAtIndex:3];
            }
        } else {
            [o_userSelections setObject:[o_t3_fld_address stringValue] \
                forKey:@"stmgDest"];
            /* let's go to the transcode-1-tab */
            [o_tab_pageHolder selectTabViewItemAtIndex:3];
        }
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Transcode 1"])
    {
        /* check whether the user wants to transcode the video-track and store 
         * the related options */
        if ([o_t4_ckb_video state] == NSOnState)
        {
            NSNumber * theNum;
            theNum = [NSNumber numberWithInt:[o_t4_pop_videoCodec indexOfSelectedItem]];
            [o_userSelections setObject:@"YES" forKey:@"trnscdVideo"];
            [o_userSelections setObject:[o_t4_pop_videoBitrate titleOfSelectedItem] \
                forKey:@"trnscdVideoBitrate"];
            [o_userSelections setObject:theNum forKey:@"trnscdVideoCodec"];
        } else {
            [o_userSelections setObject:@"NO" forKey:@"trnscdVideo"];
        }

        /* check whether the user wants to transcode the audio-track and store 
         * the related options */
        if ([o_t4_ckb_audio state] == NSOnState)
        {
            NSNumber * theNum;
            theNum = [NSNumber numberWithInt:[o_t4_pop_audioCodec indexOfSelectedItem]];
            [o_userSelections setObject:@"YES" forKey:@"trnscdAudio"];
            [o_userSelections setObject:[o_t4_pop_audioBitrate titleOfSelectedItem] \
                forKey:@"trnscdAudioBitrate"];
            [o_userSelections setObject:theNum forKey:@"trnscdAudioCodec"];
        } else {
            [o_userSelections setObject:@"NO" forKey:@"trnscdAudio"];
        }

        /* disable all encap-formats */
        [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:NO];
        [[o_t5_matrix_encap cellAtRow:10 column:0] setEnabled:NO];

        /* re-enable the encap-formats supported by the chosen codecs */
        /* FIXME: the following is a really bad coding-style. feel free to mail
            me ideas how to make this nicer, if you want to -- FK, 7/11/05 */

        if ([[o_userSelections objectForKey:@"trnscdAudio"] isEqualTo: @"YES"])
        {
            if ([[o_userSelections objectForKey:@"trnscdVideo"] isEqualTo: @"YES"])
            {
                /* we are transcoding both audio and video, so we need to check both deps */
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_PS"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections \
                        objectForKey:@"trnscdAudioCodec"] intValue]] \
                        containsObject: @"MUX_PS"])
                    {
                        [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:0 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections \
                    objectForKey:@"trnscdVideoCodec"] intValue]] containsObject: @"MUX_TS"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_TS"])
                    {
                        [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:1 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MPEG"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MPEG"])
                    {
                        [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:2 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_OGG"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections \
                        objectForKey:@"trnscdAudioCodec"] intValue]] containsObject: @"MUX_OGG"])
                    {
                        [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:3 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_RAW"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_RAW"])
                    {
                        [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:4 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_ASF"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_ASF"])
                    {
                        [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:5 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_AVI"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_AVI"])
                    {
                        [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:6 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MP4"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MP4"])
                    {
                        [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:7 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MOV"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MOV"])
                    {
                        [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:8 column:0];
                    }
                }
                if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_WAV"])
                {
                    if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                        @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_WAV"])
                    {
                        [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:YES];
                        [o_t5_matrix_encap selectCellAtRow:9 column:0];
                    }
                }

            } else {

                /* we just transcoding the audio */

                /* select formats supported by the audio codec */
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_PS"])
                {
                    [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:0 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_TS"])
                {
                    [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:1 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MPEG"])
                {
                    [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:2 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_OGG"])
                {
                    [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:3 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_RAW"])
                {
                    [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:4 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_ASF"])
                {
                    [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:5 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_AVI"])
                {
                    [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:6 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MP4"])
                {
                    [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:7 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_MOV"])
                {
                    [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:8 column:0];
                }
                if ([[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
                    @"trnscdAudioCodec"] intValue]] containsObject: @"MUX_WAV"])
                {
                    [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:YES];
                    [o_t5_matrix_encap selectCellAtRow:9 column:0];
                }
            }
        }
        else if ([[o_userSelections objectForKey:@"trnscdVideo"] isEqualTo: @"YES"])
        {
            /* we are just transcoding the video */

            /* select formats supported by the video-codec */

            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_PS"])
            {
                [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:0 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_TS"])
            {
                [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:1 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MPEG"])
            {
                [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:2 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_OGG"])
            {
                [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:3 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_RAW"])
            {
                [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:4 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_ASF"])
            {
                [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:5 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_AVI"])
            {
                [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:6 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MP4"])
            {
                [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:7 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_MOV"])
            {
                [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:8 column:0];
            }
            if ([[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] containsObject: @"MUX_WAV"])
            {
                [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:YES];
                [o_t5_matrix_encap selectCellAtRow:9 column:0];
            }
        } else {
            /* we don't do any transcoding
             * -> enabled the encap-formats allowed when streaming content via
             * http plus MP4 since this should work fine in most cases */

            /* FIXME: choose a selection of encap-formats based upon the 
             * actually used codecs */

            /* enable MPEG PS, MPEG TS, MPEG 1, OGG, RAW, ASF, MP4 and MOV
             * select MPEG PS */
            [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:YES];
            [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:10 column:0] setEnabled:NO];
            [o_t5_matrix_encap selectCellAtRow:0 column:0];
        }
        if ([o_userSelections objectForKey:@"stmgMhd"] == @"1")
        {
            /* if MMS is the streaming protocol, only ASFH is available */
            [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:10 column:0] setEnabled:YES];
            [o_t5_matrix_encap selectCellAtRow:10 column:0];
        }
        else if ([o_userSelections objectForKey:@"stmgMhd"] == @"0")
        {
            /* if HTTP is the streaming protocol, disable all unsupported
             * encap-formats, but don't touch the other ones selected above */
            [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:10 column:0] setEnabled:NO];
        }
        else if ([o_userSelections objectForKey:@"stmgMhd"] >= @"2")
        {
            /* if UDP is the streaming protocol, only MPEG-TS is available */
            [[o_t5_matrix_encap cellAtRow:0 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:2 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:3 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:4 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:5 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:6 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:7 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:8 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:9 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:10 column:0] setEnabled:NO];
            [[o_t5_matrix_encap cellAtRow:1 column:0] setEnabled:YES];
            [o_t5_matrix_encap selectCellAtRow:1 column:0];
        }
        int x;
        BOOL anythingEnabled;
        x = 0;
        anythingEnabled = NO;
        while (x != [o_t5_matrix_encap numberOfRows])
        {
            if ([[o_t5_matrix_encap cellAtRow:x column:0] isEnabled])
            {
                anythingEnabled = YES;
            }
            x = (x + 1);
        }
        if (anythingEnabled == YES)
        {
            /* go the encap-tab */
            [o_tab_pageHolder selectTabViewItemAtIndex:4];
        } else {
            /* show a sheet that the selected codecs are not compatible */
            NSBeginInformationalAlertSheet(_NS("Invalid selection"), _NS("OK"), \
                @"", @"", o_wizard_window, nil, nil, nil, nil, _NS("Your " \
                "chosen codecs are not compatible with each other. For example: " \
                "you cannot mix uncompressed audio with any video codec.\n\n" \
                "Correct your selection and try again."));
        }

    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: @"Encap"])
    {
        /* get the chosen encap format and store it */
        NSNumber * theNum;
        theNum = [NSNumber numberWithInt:[[o_t5_matrix_encap selectedCell] tag]];
        [o_userSelections setObject:[theNum stringValue] forKey:@"encapFormat"];

        /* show either "Streaming 2" or "Transcode 2" to the user */
        if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] isEqualToString:@"strmg"])
        {
            /* we are streaming */
            [o_tab_pageHolder selectTabViewItemAtIndex:5];
        }else{
            /* we are just transcoding */
            [o_tab_pageHolder selectTabViewItemAtIndex:6];
        }
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Streaming 2"])
    {
        /* store the chosen TTL */
        [o_userSelections setObject:[o_t6_fld_ttl stringValue] forKey:@"ttl"];

        /* check whether SAP is enabled and store the announce, if needed */
        if ([o_t6_ckb_sap state] == NSOnState)
        {
            [o_userSelections setObject:@"YES" forKey:@"sap"];
            [o_userSelections setObject:[o_t6_fld_sap stringValue] forKey:@"sapText"];
        } else {
            [o_userSelections setObject:@"NO" forKey:@"sap"];
        }
        
        /* local playback? */
        if ([o_t6_ckb_local state] == NSOnState)
        {
            [o_userSelections setObject:@"YES" forKey:@"localPb"];
        } else {
            [o_userSelections setObject:@"NO" forKey:@"localPb"];
        }
        
        /* go to "Summary" */
        [self showSummary];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Transcode 2"])
    {
        /* local playback? */
        if ([o_t7_ckb_local state] == NSOnState)
        {
            [o_userSelections setObject:@"YES" forKey:@"localPb"];
        } else {
            [o_userSelections setObject:@"NO" forKey:@"localPb"];
        }

        /* check whether the path != "" and store it */
        if( [[o_t7_fld_filePath stringValue] isEqualToString: @""] )
        {
            /* complain to the user that "" is no valid path */
            NSBeginInformationalAlertSheet(_NS("No file selected"), _NS("OK"), \
                @"", @"", o_wizard_window, nil, nil, nil, nil, _NS("You you " \
                "need to select a file, you want to save to.\n\n Enter either " \
                "a valid path or choose a location through the button's " \
                "dialog-box."));
        } else {
            [o_userSelections setObject:[o_t7_fld_filePath stringValue] forKey: \
                @"trnscdFilePath"];

            /* go to "Summary" */
            [self showSummary];
        }
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Summary"])
    {
        intf_thread_t * p_intf = VLCIntf;

        playlist_t * p_playlist = (playlist_t *)vlc_object_find( p_intf,
                            VLC_OBJECT_PLAYLIST, FIND_ANYWHERE);
        if( p_playlist )
        {
            playlist_item_t *p_item = playlist_ItemNew( p_playlist, [[o_userSelections \
                objectForKey:@"pathToStrm"] UTF8String], _("Streaming/Transcoding Wizard") );
            playlist_ItemAddOption( p_item, [[o_userSelections objectForKey:@"opts"] UTF8String]);

            if(! [[o_userSelections objectForKey:@"partExtractFrom"] isEqualToString:@""] )
            {
                playlist_ItemAddOption( p_item, [[@"start-time=" \
                    stringByAppendingString: [o_userSelections \
                    objectForKey:@"partExtractFrom"]] UTF8String] );
            }

            if(! [[o_userSelections objectForKey:@"partExtractTo"] isEqualToString:@""] )
            {
                playlist_ItemAddOption( p_item, [[@"stop-time=" \
                    stringByAppendingString: [o_userSelections objectForKey: \
                    @"partExtractTo"]] UTF8String] );
            }

            playlist_ItemAddOption( p_item, [[@"ttl=" stringByAppendingString: \
                [o_userSelections objectForKey:@"ttl"]] UTF8String] );

            playlist_AddItem( p_playlist, p_item, PLAYLIST_GO, PLAYLIST_END );
            
            playlist_ViewUpdate( p_playlist, VIEW_CATEGORY );

            vlc_object_release(p_playlist);
        } else {
            msg_Err( p_intf, "Uh Oh! Unable to find playlist!" );
        }

        /* close the window, since we are done */
        [o_wizard_window close];
    }
}

- (void)rebuildCodecMenus
{
    [o_t4_pop_videoCodec removeAllItems];
    unsigned int x;
    x = 0;
    while (x != [o_videoCodecs count])
    {
        [o_t4_pop_videoCodec addItemWithTitle:[[o_videoCodecs objectAtIndex:x] \
            objectAtIndex:0]];
        x = (x + 1);
    }
    [o_t4_pop_audioCodec removeAllItems];
    x = 0;
    while (x != [o_audioCodecs count])
    {
        [o_t4_pop_audioCodec addItemWithTitle:[[o_audioCodecs objectAtIndex:x] \
            objectAtIndex:0]];
        x = (x + 1);
    }
}

- (void)showSummary
{
    [o_btn_forward setTitle: _NS("Finish")];
    [o_t8_fld_inptStream setStringValue:[o_userSelections objectForKey:@"pathToStrm"]];
    
    if ([[o_userSelections objectForKey:@"localPb"] isEqualToString: @"YES"])
    {
        [o_t8_fld_local setStringValue: _NS("yes")];
    } else {
        [o_t8_fld_local setStringValue: _NS("no")];
    }

    if ([[o_userSelections objectForKey:@"partExtract"] isEqualToString: @"YES"])
    {
        [o_t8_fld_partExtract setStringValue: [[[[[_NS("yes") \
            stringByAppendingString:@" - "] stringByAppendingString: \
            _NS("from ")] stringByAppendingString: [o_userSelections \
            objectForKey:@"partExtractFrom"]] stringByAppendingString: \
            _NS(" to ")] stringByAppendingString: [o_userSelections \
            objectForKey:@"partExtractTo"]]];
    } else {
        [o_t8_fld_partExtract setStringValue: _NS("no")];
    }

    if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] isEqualToString:@"strmg"])
    {
        /* we are streaming; no transcoding allowed atm */
        [o_t8_fld_saveFileTo setStringValue: @"-"];
        [o_t8_fld_trnscdAudio setStringValue: @"-"];
        [o_t8_fld_trnscdVideo setStringValue: @"-"];
        [o_t8_fld_strmgMthd setStringValue: [[o_strmgMthds objectAtIndex: \
            [[o_userSelections objectForKey:@"stmgMhd"] intValue]] \
            objectAtIndex:1]];
        [o_t8_fld_destination setStringValue: [o_userSelections objectForKey: \
            @"stmgDest"]];
        [o_t8_fld_ttl setStringValue: [o_userSelections objectForKey:@"ttl"]];
        if ([[o_userSelections objectForKey:@"sap"] isEqualToString: @"YES"])
        {
            [o_t8_fld_sap setStringValue: [[_NS("yes") stringByAppendingString:@": "] stringByAppendingString:[o_userSelections objectForKey:@"sapText"]]];
        }else{
            [o_t8_fld_sap setStringValue: _NS("no")];
        }
    } else {
        /* we are transcoding */
        [o_t8_fld_strmgMthd setStringValue: @"-"];
        [o_t8_fld_destination setStringValue: @"-"];
        [o_t8_fld_ttl setStringValue: @"-"];
        [o_t8_fld_sap setStringValue: @"-"];
        if ([[o_userSelections objectForKey:@"trnscdVideo"] isEqualToString:@"YES"])
        {
            [o_t8_fld_trnscdVideo setStringValue: [[[[[_NS("yes") \
                stringByAppendingString:@": "] stringByAppendingString: \
                [[o_videoCodecs objectAtIndex:[[o_userSelections objectForKey: \
                @"trnscdVideoCodec"] intValue]] objectAtIndex:0]] \
                stringByAppendingString:@" @ "] stringByAppendingString: \
                [o_userSelections objectForKey:@"trnscdVideoBitrate"]] \
                stringByAppendingString:@" kb/s"]];
        }else{
            [o_t8_fld_trnscdVideo setStringValue: _NS("no")];
        }
        if ([[o_userSelections objectForKey:@"trnscdAudio"] isEqualToString:@"YES"])
        {
            [o_t8_fld_trnscdAudio setStringValue: [[[[[_NS("yes") \
            stringByAppendingString:@": "] stringByAppendingString: \
            [[o_audioCodecs objectAtIndex:[[o_userSelections objectForKey: \
            @"trnscdAudioCodec"] intValue]] objectAtIndex:0]] \
            stringByAppendingString:@" @ "] stringByAppendingString: \
            [o_userSelections objectForKey:@"trnscdAudioBitrate"]] \
            stringByAppendingString:@" kb/s"]];
        }else{
            [o_t8_fld_trnscdAudio setStringValue: _NS("no")];
        }
        [o_t8_fld_saveFileTo setStringValue: [o_userSelections objectForKey: \
            @"trnscdFilePath"]];
    }
    [o_t8_fld_encapFormat setStringValue: [[o_encapFormats objectAtIndex: \
        [[o_userSelections objectForKey:@"encapFormat"] intValue]] objectAtIndex:1]];

    [self createOpts];
    [o_t8_fld_mrl setStringValue: [o_userSelections objectForKey:@"opts"]];

    [o_tab_pageHolder selectTabViewItemAtIndex:7];
}

- (void) createOpts
{
    NSMutableString * o_opts_string = [NSMutableString stringWithString:@""];
    NSMutableString *o_trnscdCmd = [NSMutableString stringWithString:@""];
    NSMutableString *o_duplicateCmd = [NSMutableString stringWithString:@""];
    
    /* check whether we transcode the audio and/or the video and compose a
     * string reflecting the settings, if needed */
    if ([[o_userSelections objectForKey:@"trnscdVideo"] isEqualToString:@"YES"])
    {
        [o_trnscdCmd appendString: @"transcode{"];
        [o_trnscdCmd appendFormat: @"vcodec=%s,vb=%i", [[[o_videoCodecs \
            objectAtIndex:[[o_userSelections objectForKey:@"trnscdVideoCodec"] \
            intValue]] objectAtIndex:1] UTF8String],  [[o_userSelections \
            objectForKey:@"trnscdVideoBitrate"] intValue]];
        if ([[o_userSelections objectForKey:@"trnscdAudio"] isEqualToString:@"YES"])
        {
            [o_trnscdCmd appendString: @","];
        } 
        else
        {
            [o_trnscdCmd appendString: @"}:"];
        }
    }
    
    /* check whether the user requested local playback. if yes, prepare the
     * string, if not, let it empty */
    if ([[o_userSelections objectForKey:@"localPb"] isEqualToString:@"YES"])
    {
        [o_duplicateCmd appendString: @"duplicate{dst=display,dst=\""];
    }
    
    if ([[o_userSelections objectForKey:@"trnscdAudio"] isEqualToString:@"YES"])
    {
        if ([[o_userSelections objectForKey:@"trnscdVideo"] isEqualToString:@"NO"])
        {
            /* in case we transcode the audio only, add this */
            [o_trnscdCmd appendString: @"transcode{"];
        }
        [o_trnscdCmd appendFormat: @"acodec=%s,ab=%i}:", [[[o_audioCodecs \
            objectAtIndex:[[o_userSelections objectForKey:@"trnscdAudioCodec"] \
            intValue]] objectAtIndex:1] UTF8String],  [[o_userSelections \
            objectForKey:@"trnscdAudioBitrate"] intValue]];
    }
    
    if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] isEqualToString:@"trnscd"])
    {
        /* we are just transcoding and dumping the stuff to a file */
        [o_opts_string appendFormat: \
            @":sout=#%s%sstandard{mux=%s,url=%s,access=file}", [o_duplicateCmd \
            UTF8String], [o_trnscdCmd UTF8String], [[[o_encapFormats \
            objectAtIndex: [[o_userSelections objectForKey:@"encapFormat"] \
            intValue]] objectAtIndex:0] UTF8String], [[o_userSelections \
            objectForKey: @"trnscdFilePath"] UTF8String]];

    } else {

        /* we are streaming */
        if ([[o_userSelections objectForKey:@"sap"] isEqualToString:@"YES"])
        {
            /* SAP-Announcement is requested */
            NSMutableString *o_sap_option = [NSMutableString stringWithString:@""];
            if([[o_userSelections objectForKey:@"sapText"] isEqualToString:@""])
            {
                [o_sap_option appendString: @"sap"];
            } else {
                [o_sap_option appendFormat: @"sap,name=\"%s\"",[[o_userSelections \
                    objectForKey:@"sapText"] UTF8String]];
            }
            [o_opts_string appendFormat: \
                @":sout=#%s%sstandard{mux=%s,url=%s,access=%s,%s}", \
                [o_duplicateCmd UTF8String], [o_trnscdCmd UTF8String], \
                [[[o_encapFormats objectAtIndex: [[o_userSelections \
                objectForKey: @"encapFormat"] intValue]] objectAtIndex:0] \
                UTF8String], [[o_userSelections objectForKey: @"stmgDest"] \
                UTF8String], [[[o_strmgMthds objectAtIndex: [[o_userSelections \
                objectForKey: @"stmgMhd"] intValue]] objectAtIndex:0] \
                UTF8String], [o_sap_option UTF8String]];
        } else {
            /* no SAP, just streaming */
            [o_opts_string appendFormat: \
                @":sout=#%s%sstandard{mux=%s,url=%s,access=%s}", \
                [o_duplicateCmd UTF8String], [o_trnscdCmd UTF8String], \
                [[[o_encapFormats objectAtIndex: [[o_userSelections \
                objectForKey: @"encapFormat"] intValue]] objectAtIndex:0] \
                UTF8String], [[o_userSelections objectForKey: \
                @"stmgDest"] UTF8String], [[[o_strmgMthds objectAtIndex: \
                [[o_userSelections objectForKey: @"stmgMhd"] intValue]] \
                objectAtIndex:0] UTF8String]];
        }
    }

    /* check whether the user requested local playback. if yes, close the
     * string with an additional bracket */
    if ([[o_userSelections objectForKey:@"localPb"] isEqualToString:@"YES"])
    {
        [o_opts_string appendString: @"\"}"];
    }

    [o_userSelections setObject:o_opts_string forKey:@"opts"];
}

- (IBAction)prevTab:(id)sender
{
    if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: @"Summary"])
    {
        /* check whether we are streaming or transcoding and go back */
        if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] isEqualToString:@"strmg"])
        {
            /* show "Streaming 2" */
            [o_tab_pageHolder selectTabViewItemAtIndex:5];
        }else{
            /* show "Transcode 2" */
            [o_tab_pageHolder selectTabViewItemAtIndex:6];
        }
        /* rename the forward-button */
        [o_btn_forward setTitle: _NS("Next")];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Transcode 2"])
    {
        /* show "Encap" */
        [o_tab_pageHolder selectTabViewItemAtIndex:4];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Streaming 2"])
    {
        /* show "Encap" */
        [o_tab_pageHolder selectTabViewItemAtIndex:4];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Encap"])
    {
        /* show "Transcode 1" */
        [o_tab_pageHolder selectTabViewItemAtIndex:3];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Streaming 1"])
    {
        /* show "Input" */
        [o_tab_pageHolder selectTabViewItemAtIndex:1];
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Transcode 1"])
    {
        if ([[o_userSelections objectForKey:@"trnscdOrStrmg"] isEqualToString:@"strmg"])
        {
            /* show "Streaming 1" */
            [o_tab_pageHolder selectTabViewItemAtIndex:2];
        }else{
            /* show "Input" */
            [o_tab_pageHolder selectTabViewItemAtIndex:1];
        }
    }
    else if ([[[o_tab_pageHolder selectedTabViewItem] label] isEqualToString: \
        @"Input"])
    {
        /* reset the wizard before going backwards. Otherwise, we might get
         * unwanted behaviours in the Encap-Selection */
        [self resetWizard];
        /* show "Hello" */
        [o_tab_pageHolder selectTabViewItemAtIndex:0];
        /* disable backwards-btn */
        [o_btn_backward setEnabled:NO];
    }
}

- (IBAction)t1_mrInfo_streaming:(id)sender
{
    /* show a sheet for the help */
    /* since NSAlert does not exist on OSX < 10.3, we use our own implementation */
    [o_wh_txt_title setStringValue: _NS("Stream to network")];
    [o_wh_txt_text setStringValue: _NS("Use this to stream on a network.")];
    [NSApp beginSheet: o_wizardhelp_window
            modalForWindow: o_wizard_window
            modalDelegate: o_wizardhelp_window
            didEndSelector: nil
            contextInfo: nil];
}

- (IBAction)t1_mrInfo_transcode:(id)sender
{
    /* show a sheet for the help */
    [o_wh_txt_title setStringValue: _NS("Transcode/Save to file")];
    [o_wh_txt_text setStringValue: _NS("Use this to save a stream to a file. You "\
        "have the possibility to reencode the stream. You can save whatever "\
        "VLC can read.\nPlease notice that VLC is not very suited " \
        "for file to file transcoding. You should use its transcoding " \
        "features to save network streams, for example.")];
    [NSApp beginSheet: o_wizardhelp_window
            modalForWindow: o_wizard_window
            modalDelegate: o_wizardhelp_window
            didEndSelector: nil
            contextInfo: nil];
}

- (IBAction)t2_addNewStream:(id)sender
{
    NSOpenPanel * openPanel = [NSOpenPanel openPanel];
    SEL sel = @selector(t2_getNewStreamFromDialog:returnCode:contextInfo:);
    [openPanel beginSheetForDirectory:nil file:nil types:nil modalForWindow: \
        o_wizard_window modalDelegate:self didEndSelector:sel contextInfo:nil];
}

- (void)t2_getNewStreamFromDialog: (NSOpenPanel *)sheet returnCode: \
    (int)returnCode contextInfo: (void *)contextInfo
{
    if (returnCode == NSOKButton)
    {
        [o_t2_fld_pathToNewStrm setStringValue: [@"file://" \
            stringByAppendingString: [sheet filename]]];
    }
}

- (IBAction)t2_chooseStreamOrPlst:(id)sender
{
    /* enable and disable the respective items depending on user's choice */
    NSString *o_mode;
    o_mode = [[o_t2_matrix_inputSourceType selectedCell] title];

    if( [o_mode isEqualToString: _NS("Select a stream")] )
    {
        [o_t2_btn_chooseFile setEnabled:YES];
        [o_t2_fld_pathToNewStrm setEnabled:YES];
        [o_t2_tbl_plst setEnabled:NO];
    } else {
        [o_t2_btn_chooseFile setEnabled:NO];
        [o_t2_fld_pathToNewStrm setEnabled:NO];
        [o_t2_tbl_plst setEnabled:YES];
    }
}

- (IBAction)t2_enableExtract:(id)sender
{
    /* enable/disable the respective items */
    if([o_t2_ckb_enblPartExtrct state] == NSOnState)
    {
        [o_t2_fld_prtExtrctFrom setEnabled:YES];
        [o_t2_fld_prtExtrctTo setEnabled:YES];
    } else {
        [o_t2_fld_prtExtrctFrom setEnabled:NO];
        [o_t2_fld_prtExtrctTo setEnabled:NO];
        [o_t2_fld_prtExtrctFrom setStringValue:@""];
        [o_t2_fld_prtExtrctTo setStringValue:@""];
    }
}

- (IBAction)t3_strmMthdChanged:(id)sender
{
    /* change the captions of o_t3_txt_destInfo according to the chosen
     * streaming method */
    NSNumber * o_mode;
    o_mode = [[NSNumber alloc] initWithInt:[[o_t3_matrix_stmgMhd selectedCell] tag]];
    if( [o_mode intValue] == 0 )
    {
        /* UDP-Unicast */
        [o_t3_txt_destInfo setStringValue: [[o_strmgMthds objectAtIndex:2] \
            objectAtIndex:2]];
        [o_t3_txt_strgMthdInfo setStringValue: [[o_strmgMthds objectAtIndex:2] \
        objectAtIndex:3]];
    }
    else if ( [o_mode intValue] == 1 )
    {
        /* UDP-Multicast */
        [o_t3_txt_destInfo setStringValue: [[o_strmgMthds objectAtIndex:3] \
            objectAtIndex:2]];
        [o_t3_txt_strgMthdInfo setStringValue: [[o_strmgMthds objectAtIndex:3] \
        objectAtIndex:3]];
    }
    else if( [o_mode intValue] == 2 )
    {
        /* HTTP */
        [o_t3_txt_destInfo setStringValue: [[o_strmgMthds objectAtIndex:0] \
            objectAtIndex:2]];
        [o_t3_txt_strgMthdInfo setStringValue: [[o_strmgMthds objectAtIndex:0] \
            objectAtIndex:3]];
    }
    else if( [o_mode intValue] == 3 )
    {
        /* MMS */
        [o_t3_txt_destInfo setStringValue: [[o_strmgMthds objectAtIndex:1] \
            objectAtIndex:2]];
        [o_t3_txt_strgMthdInfo setStringValue: [[o_strmgMthds objectAtIndex:1] \
            objectAtIndex:3]];
    }
    [o_mode release];
}

- (IBAction)t4_AudCdcChanged:(id)sender
{
    /* update codec info */
    [o_t4_txt_hintAudio setStringValue:[[o_audioCodecs objectAtIndex: \
        [o_t4_pop_audioCodec indexOfSelectedItem]] objectAtIndex:2]];
}

- (IBAction)t4_enblAudTrnscd:(id)sender
{
    /* enable/disable the respective items */
    if([o_t4_ckb_audio state] == NSOnState)
    {
        [o_t4_pop_audioCodec setEnabled:YES];
        [o_t4_pop_audioBitrate setEnabled:YES];
        [o_t4_txt_hintAudio setStringValue: _NS("Select your audio codec. "\
        "Click one to get more information.")];
    } else {
        [o_t4_pop_audioCodec setEnabled:NO];
        [o_t4_pop_audioBitrate setEnabled:NO];
        [o_t4_txt_hintAudio setStringValue: _NS("If your stream has audio " \
        "and you want to transcode it, enable this.")];
    }
}

- (IBAction)t4_enblVidTrnscd:(id)sender
{
    /* enable/disable the respective items */
    if([o_t4_ckb_video state] == NSOnState)
    {
        [o_t4_pop_videoCodec setEnabled:YES];
        [o_t4_pop_videoBitrate setEnabled:YES];
        [o_t4_txt_hintVideo setStringValue: _NS("Select your video codec. "\
        "Click one to get more information.")];
    } else {
        [o_t4_pop_videoCodec setEnabled:NO];
        [o_t4_pop_videoBitrate setEnabled:NO];
        [o_t4_txt_hintVideo setStringValue: _NS("If your stream has video " \
        "and you want to transcode it, enable this.")];
    }
}

- (IBAction)t4_VidCdcChanged:(id)sender
{
    /* update codec info */
    [o_t4_txt_hintVideo setStringValue:[[o_videoCodecs objectAtIndex: \
        [o_t4_pop_videoCodec indexOfSelectedItem]] objectAtIndex:2]];
}

- (IBAction)t6_enblSapAnnce:(id)sender
{
    /* enable/disable input fld */
    if([o_t6_ckb_sap state] == NSOnState)
    {
        [o_t6_fld_sap setEnabled:YES];
    } else {
        [o_t6_fld_sap setEnabled:NO];
        [o_t6_fld_sap setStringValue:@""];
    }
}

- (IBAction)t6_mrInfo_ttl:(id)sender
{
    /* show a sheet for the help */
    [o_wh_txt_title setStringValue: _NS("Time-To-Live (TTL)")];
    [o_wh_txt_text setStringValue: _NS("Define the TTL (Time-To-Live) of the stream. "\
            "This parameter is the maximum number of routers your stream can go " \
            "through. If you don't know what it means, or if you want to stream on " \
            "your local network only, leave this setting to 1.")];
    [NSApp beginSheet: o_wizardhelp_window
            modalForWindow: o_wizard_window
            modalDelegate: o_wizardhelp_window
            didEndSelector: nil
            contextInfo: nil];
}

- (IBAction)t6_mrInfo_sap:(id)sender
{
    /* show a sheet for the help */
    [o_wh_txt_title setStringValue: _NS("SAP Announce")];
    [o_wh_txt_text setStringValue: _NS("When streaming using UDP, you can " \
        "announce your streams using the SAP/SDP announcing protocol. This " \
        "way, the clients won't have to type in the multicast address, it " \
        "will appear in their playlist if they enable the SAP extra interface.\n" \
        "If you want to give a name to your stream, enter it here, " \
        "else, a default name will be used.")];
    [NSApp beginSheet: o_wizardhelp_window
            modalForWindow: o_wizard_window
            modalDelegate: o_wizardhelp_window
            didEndSelector: nil
            contextInfo: nil];
}

- (IBAction)t67_mrInfo_local:(id)sender
{
    /* show a sheet for the help */
    NSBeginInformationalAlertSheet(_NS("Local playback"), \
            _NS("OK"), @"", @"", o_wizard_window, nil, nil, nil, nil, \
            _NS("When this option is enabled, the stream will be both played " \
            "and transcoded/streamed.\n\nNote that this requires much more " \
            "CPU power than simple transcoding or streaming."));
}

- (IBAction)t7_selectTrnscdDestFile:(id)sender
{
    /* provide a save-to-dialogue, so the user can choose a location for his/her new file */
    NSSavePanel * savePanel = [NSSavePanel savePanel];
    SEL sel = @selector(t7_getTrnscdDestFile:returnCode:contextInfo:);
    NSString * theEncapFormat = [[o_encapFormats objectAtIndex: \
        [[o_userSelections objectForKey:@"encapFormat"] intValue]] \
        objectAtIndex:0];
    
    /* don't use ".ps" as suffix, since the OSX Finder confuses our creations 
     * with PostScript-files and wants to open them with Preview.app */
    if (theEncapFormat != @"ps")
    {
        [savePanel setRequiredFileType: theEncapFormat];
    } else {
        [savePanel setRequiredFileType: @"mpg"];
    }
    
    [savePanel setCanSelectHiddenExtension:YES];
    [savePanel beginSheetForDirectory:nil file:nil modalForWindow: \
        o_wizard_window modalDelegate:self didEndSelector:sel contextInfo:nil];
}

- (void)t7_getTrnscdDestFile: (NSSavePanel *)sheet returnCode: \
    (int)returnCode contextInfo: (void *)contextInfo
{
    if (returnCode == NSOKButton)
    {
        /* output returned path to text-field */
        [o_t7_fld_filePath setStringValue:[sheet filename]];
    }
}

- (IBAction)wh_closeSheet:(id)sender
{
    /* close the help sheet */
    [NSApp endSheet:o_wizardhelp_window];
    [o_wizardhelp_window close];
}

@end
