livedotcom.cpp

video linux conference

/*****************************************************************************
 * live.cpp : live.com support.
 *****************************************************************************
 * Copyright (C) 2003-2004 VideoLAN
 * $Id: livedotcom.cpp 11522 2005-06-25 09:46:50Z hartman $
 *
 * Authors: Laurent Aimar <[e-mail]>
 *
 * 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.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */

#include <vlc/vlc.h>
#include <vlc/input.h>
#include "network.h"

#include <iostream>

#if defined( WIN32 )
#   include <winsock2.h>
#endif

#include "BasicUsageEnvironment.hh"
#include "GroupsockHelper.hh"
#include "liveMedia.hh"

extern "C" {
#include "../access/mms/asf.h"  /* Who said ugly ? */
}

#if (LIVEMEDIA_LIBRARY_VERSION_INT < 1089936000)
#define RECLAIM_ENV(env) delete (env)
#else
#define RECLAIM_ENV(env) (env)->reclaim()
#endif

using namespace std;

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

#define CACHING_TEXT N_("Caching value (ms)")
#define CACHING_LONGTEXT N_( \
    "Allows you to modify the default caching value for RTSP streams. This " \
    "value should be set in millisecond units." )

#define KASENNA_TEXT N_( "Kasenna RTSP dialect")
#define KASENNA_LONGTEXT N_( "Kasenna server speak an old and unstandard " \
    "dialect of RTSP. When you set this parameter, VLC will try this dialect "\
    "for communication. In this mode you cannot talk to normal RTSP servers." )

vlc_module_begin();
    set_description( _("live.com (RTSP/RTP/SDP) demuxer" ) );
    set_capability( "demux2", 50 );
    set_shortname( "Live.com RTP/RTSP");
    set_callbacks( Open, Close );
    add_shortcut( "live" );
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_DEMUX );

    add_submodule();
        set_description( _("RTSP/RTP access and demux") );
        add_shortcut( "rtsp" );
        add_shortcut( "sdp" );
        set_capability( "access_demux", 0 );
        set_callbacks( Open, Close );
        add_bool( "rtsp-tcp", 0, NULL,
                  N_("Use RTP over RTSP (TCP)"),
                  N_("Use RTP over RTSP (TCP)"), VLC_TRUE );
        add_integer( "rtsp-caching", 4 * DEFAULT_PTS_DELAY / 1000, NULL,
            CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
        add_bool( "rtsp-kasenna", VLC_FALSE, NULL, KASENNA_TEXT,
                  KASENNA_LONGTEXT, VLC_TRUE );
vlc_module_end();

/* TODO:
 *  - Improve support of PS/TS
 *  - Support X-QT/X-QUICKTIME generic codec for audio.
 *
 *  - Check memory leak, delete/free -> still one when using rtsp-tcp but I'm
 *  not sure if it comes from me.
 *
 */

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
typedef struct
{
    demux_t     *p_demux;

    vlc_bool_t   b_quicktime;
    vlc_bool_t   b_muxed;
    vlc_bool_t   b_asf;

    es_format_t  fmt;
    es_out_id_t  *p_es;

    stream_t     *p_out_muxed;    /* for muxed stream */

    RTPSource    *rtpSource;
    FramedSource *readSource;
    vlc_bool_t   b_rtcp_sync;

    uint8_t      *p_buffer;
    unsigned int  i_buffer;

    char         waiting;

    mtime_t      i_pts;

} live_track_t;

struct demux_sys_t
{
    char         *p_sdp;    /* XXX mallocated */
    char         *psz_path; /* URL-encoded path */

    MediaSession     *ms;
    TaskScheduler    *scheduler;
    UsageEnvironment *env ;
    RTSPClient       *rtsp;

    /* */
    int              i_track;
    live_track_t     **track;   /* XXX mallocated */
    mtime_t          i_pcr;
    mtime_t          i_pcr_start;

    /* Asf */
    asf_header_t     asfh;
    stream_t         *p_out_asf;

    /* */
    mtime_t          i_length;
    mtime_t          i_start;

    /* */
    vlc_bool_t       b_multicast;   /* true if one of the tracks is multicasted */
    vlc_bool_t       b_no_data;     /* true if we never receive any data */
    int              i_no_data_ti;  /* consecutive number of TaskInterrupt */

    char             event;
};

static int Demux  ( demux_t * );
static int Control( demux_t *, int, va_list );

static int ParseASF( demux_t * );

static int RollOverTcp( demux_t * );

static void StreamRead( void *, unsigned int, unsigned int,
                        struct timeval, unsigned int );
static void StreamClose( void * );
static void TaskInterrupt( void * );

/*****************************************************************************
 * DemuxOpen:
 *****************************************************************************/
static int  Open ( vlc_object_t *p_this )
{
    demux_t     *p_demux = (demux_t*)p_this;
    demux_sys_t *p_sys;

    MediaSubsessionIterator *iter;
    MediaSubsession *sub;

    vlc_bool_t b_rtsp_tcp;
    uint8_t *p_peek;

    int     i_sdp;
    int     i_sdp_max;
    uint8_t *p_sdp;

    if( p_demux->s )
    {
        /* See if it looks like a SDP
           v, o, s fields are mandatory and in this order */
        if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;

        if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
            strncmp( (char*)p_peek, "v=0\n", 4 ) &&
            ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
        {
            return VLC_EGENERIC;
        }
    }
    else
    {
        var_Create( p_demux, "rtsp-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
    }

    p_demux->pf_demux  = Demux;
    p_demux->pf_control= Control;
    p_demux->p_sys     = p_sys = (demux_sys_t*)malloc( sizeof( demux_sys_t ) );
    p_sys->p_sdp = NULL;
    p_sys->scheduler = NULL;
    p_sys->env = NULL;
    p_sys->ms = NULL;
    p_sys->rtsp = NULL;
    p_sys->i_track = 0;
    p_sys->track   = NULL;
    p_sys->i_pcr   = 0;
    p_sys->i_pcr_start = 0;
    p_sys->i_length = 0;
    p_sys->i_start = 0;
    p_sys->p_out_asf = NULL;
    p_sys->b_no_data = VLC_TRUE;
    p_sys->i_no_data_ti = 0;
    p_sys->b_multicast = VLC_FALSE;
    p_sys->psz_path = p_demux->psz_path;


    if( ( p_sys->scheduler = BasicTaskScheduler::createNew() ) == NULL )
    {
        msg_Err( p_demux, "BasicTaskScheduler::createNew failed" );
        goto error;
    }
    if( !( p_sys->env = BasicUsageEnvironment::createNew(*p_sys->scheduler) ) )
    {
        msg_Err( p_demux, "BasicUsageEnvironment::createNew failed" );
        goto error;
    }

    if( strcasecmp( p_demux->psz_access, "sdp" ) && 
	vlc_UrlIsNotEncoded( p_sys->psz_path ) )
    {
        p_sys->psz_path = vlc_UrlEncode( p_sys->psz_path );
        if( p_sys->psz_path == NULL )
            goto error;
    }

    if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "rtsp" ) )
    {
        char *psz_url;
        char *psz_options;

        if( ( p_sys->rtsp = RTSPClient::createNew(*p_sys->env, 1/*verbose*/,
              "VLC Media Player" ) ) == NULL )
        {
            msg_Err( p_demux, "RTSPClient::createNew failed (%s)",
                     p_sys->env->getResultMsg() );
            goto error;
        }
        psz_url = (char*)malloc( strlen( p_sys->psz_path ) + 8 );
        sprintf( psz_url, "rtsp://%s", p_sys->psz_path );

        psz_options = p_sys->rtsp->sendOptionsCmd( psz_url );
        if( psz_options )
            delete [] psz_options;

        p_sdp = (uint8_t*)p_sys->rtsp->describeURL( psz_url,
                              NULL, var_CreateGetBool( p_demux, "rtsp-kasenna" ) );
        if( p_sdp == NULL )
        {
            msg_Err( p_demux, "describeURL failed (%s)",
                     p_sys->env->getResultMsg() );
            free( psz_url );
            goto error;
        }
        free( psz_url );

        /* malloc-ated copy */
        p_sys->p_sdp = strdup( (char*)p_sdp );
        delete[] p_sdp;
        fprintf( stderr, "sdp=%s\n", p_sys->p_sdp );
    }
    else if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "sdp" ) )
    {
        p_sys->p_sdp = strdup( p_sys->psz_path );
    }
    else
    {
        /* Gather the complete sdp file */
        i_sdp = 0;
        i_sdp_max = 1000;
        p_sdp = (uint8_t*)malloc( i_sdp_max );
        for( ;; )
        {
            int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp],
                                      i_sdp_max - i_sdp - 1 );

            if( i_read < 0 )
            {
                msg_Err( p_demux, "failed to read SDP" );
                free( p_sys );
                return VLC_EGENERIC;
            }

            i_sdp += i_read;

            if( i_read < i_sdp_max - i_sdp - 1 )
            {
                p_sdp[i_sdp] = '\0';
                break;
            }

            i_sdp_max += 1000;
            p_sdp = (uint8_t*)realloc( p_sdp, i_sdp_max );
        }
        p_sys->p_sdp = (char*)p_sdp;

        msg_Dbg( p_demux, "sdp=%s\n", p_sys->p_sdp );
    }
    if( !( p_sys->ms = MediaSession::createNew( *p_sys->env, p_sys->p_sdp ) ) )
    {
        msg_Err( p_demux, "MediaSession::createNew failed" );
        goto error;
    }

    b_rtsp_tcp = var_CreateGetBool( p_demux, "rtsp-tcp" );

    /* Initialise each media subsession */
    iter = new MediaSubsessionIterator( *p_sys->ms );
    while( ( sub = iter->next() ) != NULL )
    {
        unsigned int i_buffer = 0;
        Boolean bInit;

        /* Value taken from mplayer */
        if( !strcmp( sub->mediumName(), "audio" ) )
            i_buffer = 100000;
        else if( !strcmp( sub->mediumName(), "video" ) )
            i_buffer = 2000000;
        else
            continue;

        if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
            bInit = sub->initiate( 4 ); /* Constant ? */
        else
            bInit = sub->initiate();

        if( !bInit )
        {
            msg_Warn( p_demux, "RTP subsession '%s/%s' failed (%s)",
                      sub->mediumName(), sub->codecName(),
                      p_sys->env->getResultMsg() );
        }
        else
        {
            if( sub->rtpSource() )
            {
                int fd = sub->rtpSource()->RTPgs()->socketNum();
                /* Increase the buffer size */
                increaseReceiveBufferTo( *p_sys->env, fd, i_buffer );
            }

            msg_Dbg( p_demux, "RTP subsession '%s/%s'", sub->mediumName(),
                     sub->codecName() );

            /* Issue the SETUP */
            if( p_sys->rtsp )
            {
                p_sys->rtsp->setupMediaSubsession( *sub, False,
                                                   b_rtsp_tcp ? True : False );
            }
            if( !p_sys->b_multicast )
            {
                /* Check, because we need diff. rollover behaviour for multicast */
                p_sys->b_multicast = IsMulticastAddress( sub->connectionEndpointAddress() );
            }
        }
    }

    if( p_sys->rtsp )
    {
        /* The PLAY */
        if( !p_sys->rtsp->playMediaSession( *p_sys->ms ) )
        {
            msg_Err( p_demux, "PLAY failed %s", p_sys->env->getResultMsg() );
            goto error;
        }
    }

    /* Create all es struct */
    iter->reset();
    while( ( sub = iter->next() ) != NULL )
    {
        live_track_t *tk;

        if( sub->readSource() == NULL )
        {
            continue;
        }

        tk = (live_track_t*)malloc( sizeof( live_track_t ) );
        tk->p_demux = p_demux;
        tk->waiting = 0;
        tk->i_pts   = 0;
        tk->b_quicktime = VLC_FALSE;
        tk->b_muxed     = VLC_FALSE;
        tk->b_asf       = VLC_FALSE;
        tk->b_rtcp_sync = VLC_FALSE;
        tk->p_out_muxed = NULL;
        tk->p_es        = NULL;
        tk->i_buffer    = 65536;
        tk->p_buffer    = (uint8_t *)malloc( 65536 );

        /* Value taken from mplayer */
        if( !strcmp( sub->mediumName(), "audio" ) )
        {
            es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('u','n','d','f') );
            tk->fmt.audio.i_channels = sub->numChannels();
            tk->fmt.audio.i_rate = sub->rtpSource()->timestampFrequency();

            if( !strcmp( sub->codecName(), "MPA" ) ||
                !strcmp( sub->codecName(), "MPA-ROBUST" ) ||
                !strcmp( sub->codecName(), "X-MP3-DRAFT-00" ) )
            {
                tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
                tk->fmt.audio.i_rate = 0;
            }
            else if( !strcmp( sub->codecName(), "AC3" ) )
            {
                tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
                tk->fmt.audio.i_rate = 0;
            }
            else if( !strcmp( sub->codecName(), "L16" ) )
            {
                tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
                tk->fmt.audio.i_bitspersample = 16;
            }
            else if( !strcmp( sub->codecName(), "L8" ) )
            {
                tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
                tk->fmt.audio.i_bitspersample = 8;
            }
            else if( !strcmp( sub->codecName(), "PCMU" ) )
            {
                tk->fmt.i_codec = VLC_FOURCC( 'u', 'l', 'a', 'w' );