stream_output.c

video linux conference

    p_mux->p_sout = p_sout;
    psz_next = sout_CfgCreate( &p_mux->psz_mux, &p_mux->p_cfg, psz_mux );
    if( psz_next ) free( psz_next );

    p_mux->p_access     = p_access;
    p_mux->pf_control   = NULL;
    p_mux->pf_addstream = NULL;
    p_mux->pf_delstream = NULL;
    p_mux->pf_mux       = NULL;
    p_mux->i_nb_inputs  = 0;
    p_mux->pp_inputs    = NULL;

    p_mux->p_sys        = NULL;
    p_mux->p_module     = NULL;

    p_mux->b_add_stream_any_time = VLC_FALSE;
    p_mux->b_waiting_stream = VLC_TRUE;
    p_mux->i_add_stream_start = -1;

    vlc_object_attach( p_mux, p_sout );

    p_mux->p_module =
        module_Need( p_mux, "sout mux", p_mux->psz_mux, VLC_TRUE );

    if( p_mux->p_module == NULL )
    {
        FREE( p_mux->psz_mux );

        vlc_object_detach( p_mux );
        vlc_object_destroy( p_mux );
        return NULL;
    }

    /* *** probe mux capacity *** */
    if( p_mux->pf_control )
    {
        int b_answer = VLC_FALSE;

        if( sout_MuxControl( p_mux, MUX_CAN_ADD_STREAM_WHILE_MUXING,
                             &b_answer ) )
        {
            b_answer = VLC_FALSE;
        }

        if( b_answer )
        {
            msg_Dbg( p_sout, "muxer support adding stream at any time" );
            p_mux->b_add_stream_any_time = VLC_TRUE;
            p_mux->b_waiting_stream = VLC_FALSE;

            /* If we control the output pace then it's better to wait before
             * starting muxing (generates better streams/files). */
            if( !p_sout->i_out_pace_nocontrol )
            {
                b_answer = VLC_TRUE;
            }
            else if( sout_MuxControl( p_mux, MUX_GET_ADD_STREAM_WAIT,
                                      &b_answer ) )
            {
                b_answer = VLC_FALSE;
            }

            if( b_answer )
            {
                msg_Dbg( p_sout, "muxer prefers waiting for all ES before "
                         "starting muxing" );
                p_mux->b_waiting_stream = VLC_TRUE;
            }
        }
    }

    return p_mux;
}

/*****************************************************************************
 * sout_MuxDelete:
 *****************************************************************************/
void sout_MuxDelete( sout_mux_t *p_mux )
{
    vlc_object_detach( p_mux );
    if( p_mux->p_module )
    {
        module_Unneed( p_mux, p_mux->p_module );
    }
    free( p_mux->psz_mux );

    sout_CfgDestroy( p_mux->p_cfg );

    vlc_object_destroy( p_mux );
}

/*****************************************************************************
 * sout_MuxAddStream:
 *****************************************************************************/
sout_input_t *sout_MuxAddStream( sout_mux_t *p_mux, es_format_t *p_fmt )
{
    sout_input_t *p_input;

    if( !p_mux->b_add_stream_any_time && !p_mux->b_waiting_stream )
    {
        msg_Err( p_mux, "cannot add a new stream (unsuported while muxing "
                        "for this format)" );
        return NULL;
    }

    msg_Dbg( p_mux, "adding a new input" );

    /* create a new sout input */
    p_input = malloc( sizeof( sout_input_t ) );
    p_input->p_sout = p_mux->p_sout;
    p_input->p_fmt  = p_fmt;
    p_input->p_fifo = block_FifoNew( p_mux->p_sout );
    p_input->p_sys  = NULL;

    TAB_APPEND( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );
    if( p_mux->pf_addstream( p_mux, p_input ) < 0 )
    {
            msg_Err( p_mux, "cannot add this stream" );
            TAB_REMOVE( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );
            block_FifoRelease( p_input->p_fifo );
            free( p_input );
            return NULL;
    }

    return p_input;
}

/*****************************************************************************
 * sout_MuxDeleteStream:
 *****************************************************************************/
void sout_MuxDeleteStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
    int i_index;

    if( p_mux->b_waiting_stream && p_input->p_fifo->i_depth > 0 )
    {
        /* We stop waiting, and call the muxer for taking care of the data
         * before we remove this es */
        p_mux->b_waiting_stream = VLC_FALSE;
        p_mux->pf_mux( p_mux );
    }

    TAB_FIND( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input, i_index );
    if( i_index >= 0 )
    {
        if( p_mux->pf_delstream( p_mux, p_input ) < 0 )
        {
            msg_Err( p_mux, "cannot del this stream from mux" );
        }

        /* remove the entry */
        TAB_REMOVE( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );

        if( p_mux->i_nb_inputs == 0 )
        {
            msg_Warn( p_mux, "no more input stream for this mux" );
        }

        block_FifoRelease( p_input->p_fifo );
        free( p_input );
    }
}

/*****************************************************************************
 * sout_MuxSendBuffer:
 *****************************************************************************/
void sout_MuxSendBuffer( sout_mux_t *p_mux, sout_input_t *p_input,
                         block_t *p_buffer )
{
    block_FifoPut( p_input->p_fifo, p_buffer );

    if( p_mux->p_sout->i_out_pace_nocontrol )
    {
        mtime_t current_date = mdate();
        if ( current_date > p_buffer->i_dts )
            msg_Warn( p_mux, "late buffer for mux input ("I64Fd")",
                      current_date - p_buffer->i_dts );
    }

    if( p_mux->b_waiting_stream )
    {
        if( p_mux->i_add_stream_start < 0 )
        {
            p_mux->i_add_stream_start = p_buffer->i_dts;
        }

        if( p_mux->i_add_stream_start >= 0 &&
            p_mux->i_add_stream_start + I64C(1500000) < p_buffer->i_dts )
        {
            /* Wait until we have more than 1.5 seconds worth of data
             * before start muxing */
            p_mux->b_waiting_stream = VLC_FALSE;
        }
        else
        {
            return;
        }
    }
    p_mux->pf_mux( p_mux );
}

/*****************************************************************************
 *
 *****************************************************************************/
static int mrl_Parse( mrl_t *p_mrl, char *psz_mrl )
{
    char * psz_dup = strdup( psz_mrl );
    char * psz_parser = psz_dup;
    char * psz_access = "";
    char * psz_way = "";
    char * psz_name = "";

    /* *** first parse psz_dest */
    while( *psz_parser && *psz_parser != ':' )
    {
        if( *psz_parser == '{' )
        {
            while( *psz_parser && *psz_parser != '}' )
            {
                psz_parser++;
            }
            if( *psz_parser )
            {
                psz_parser++;
            }
        }
        else
        {
            psz_parser++;
        }
    }
#if defined( WIN32 ) || defined( UNDER_CE )
    if( psz_parser - psz_dup == 1 )
    {
        /* msg_Warn( p_sout, "drive letter %c: found in source string",
                          *psz_dup ) ; */
        psz_parser = "";
    }
#endif

    if( !*psz_parser )
    {
        psz_access = psz_way = "";
        psz_name = psz_dup;
    }
    else
    {
        *psz_parser++ = '\0';

        /* let's skip '//' */
        if( psz_parser[0] == '/' && psz_parser[1] == '/' )
        {
            psz_parser += 2 ;
        }

        psz_name = psz_parser ;

        /* Come back to parse the access and mux plug-ins */
        psz_parser = psz_dup;

        if( !*psz_parser )
        {
            /* No access */
            psz_access = "";
        }
        else if( *psz_parser == '/' )
        {
            /* No access */
            psz_access = "";
            psz_parser++;
        }
        else
        {
            psz_access = psz_parser;

            while( *psz_parser && *psz_parser != '/' )
            {
                if( *psz_parser == '{' )
                {
                    while( *psz_parser && *psz_parser != '}' )
                    {
                        psz_parser++;
                    }
                    if( *psz_parser )
                    {
                        psz_parser++;
                    }
                }
                else
                {
                    psz_parser++;
                }
            }

            if( *psz_parser == '/' )
            {
                *psz_parser++ = '\0';
            }
        }

        if( !*psz_parser )
        {
            /* No mux */
            psz_way = "";
        }
        else
        {
            psz_way = psz_parser;
        }
    }

    p_mrl->psz_access = strdup( psz_access );
    p_mrl->psz_way    = strdup( psz_way );
    p_mrl->psz_name   = strdup( psz_name );

    free( psz_dup );
    return( VLC_SUCCESS );
}


/* mrl_Clean: clean p_mrl  after a call to mrl_Parse */
static void mrl_Clean( mrl_t *p_mrl )
{
    FREE( p_mrl->psz_access );
    FREE( p_mrl->psz_way );
    FREE( p_mrl->psz_name );
}


/****************************************************************************
 ****************************************************************************
 **
 **
 **
 ****************************************************************************
 ****************************************************************************/

/* create a complete chain */
/* chain format:
    module{option=*:option=*}[:module{option=*:...}]
 */

/*
 * parse module{options=str, option="str "}:
 *  return a pointer on the rest
 *  XXX: psz_chain is modified
 */
#define SKIPSPACE( p ) { while( *p && ( *p == ' ' || *p == '\t' ) ) p++; }
#define SKIPTRAILINGSPACE( p, e ) \
    { while( e > p && ( *(e-1) == ' ' || *(e-1) == '\t' ) ) e--; }

/* go accross " " and { } */
static char *_get_chain_end( char *str )
{
    char c, *p = str;

    SKIPSPACE( p );

    for( ;; )
    {
        if( !*p || *p == ',' || *p == '}' ) return p;

        if( *p != '{' && *p != '"' && *p != '\'' )
        {
            p++;
            continue;
        }

        if( *p == '{' ) c = '}';
        else c = *p;
        p++;

        for( ;; )
        {