input.c

video linux conference

 *****************************************************************************
 * This function should not return until the thread is effectively cancelled.
 *****************************************************************************/
void input_DestroyThread( input_thread_t *p_input )
{
    /* Join the thread */
    vlc_thread_join( p_input );

    /* Delete input lock (only after thread joined) */
    vlc_mutex_destroy( &p_input->lock_control );

    /* TODO: maybe input_DestroyThread should also delete p_input instead
     * of the playlist but I'm not sure if it's possible */
}

/*****************************************************************************
 * Run: main thread loop
 *****************************************************************************
 * Thread in charge of processing the network packets and demultiplexing.
 *
 * TODO:
 *  read subtitle support (XXX take care of spu-delay in the right way).
 *  multi-input support (XXX may be done with subs)
 *****************************************************************************/
static int Run( input_thread_t *p_input )
{
    int64_t i_intf_update = 0;

    /* Signal that the thread is launched */
    vlc_thread_ready( p_input );

    if( Init( p_input, VLC_FALSE ) )
    {
        /* If we failed, wait before we are killed, and exit */
        p_input->b_error = VLC_TRUE;

        Error( p_input );

        /* Tell we're dead */
        p_input->b_dead = VLC_TRUE;

        return 0;
    }

    /* Main loop */
    while( !p_input->b_die && !p_input->b_error && !p_input->input.b_eof )
    {
        vlc_bool_t b_force_update = VLC_FALSE;
        int i_ret;
        int i_type;
        vlc_value_t val;

        /* Do the read */
        if( p_input->i_state != PAUSE_S  )
        {
            if( p_input->i_stop <= 0 || p_input->i_time < p_input->i_stop )
                i_ret=p_input->input.p_demux->pf_demux(p_input->input.p_demux);
            else
                i_ret = 0;  /* EOF */

            if( i_ret > 0 )
            {
                /* TODO */
                if( p_input->input.b_title_demux &&
                    p_input->input.p_demux->info.i_update )
                {
                    i_ret = UpdateFromDemux( p_input );
                    b_force_update = VLC_TRUE;
                }
                else if( !p_input->input.b_title_demux &&
                          p_input->input.p_access &&
                          p_input->input.p_access->info.i_update )
                {
                    i_ret = UpdateFromAccess( p_input );
                    b_force_update = VLC_TRUE;
                }
            }

            if( i_ret == 0 )    /* EOF */
            {
                vlc_value_t repeat;

                var_Get( p_input, "input-repeat", &repeat );
                if( repeat.i_int == 0 )
                {
                    /* End of file - we do not set b_die because only the
                     * playlist is allowed to do so. */
                    msg_Dbg( p_input, "EOF reached" );
                    p_input->input.b_eof = VLC_TRUE;
                }
                else
                {
                    msg_Dbg( p_input, "repeating the same input (%d)",
                             repeat.i_int );
                    if( repeat.i_int > 0 )
                    {
                        repeat.i_int--;
                        var_Set( p_input, "input-repeat", repeat );
                    }

                    /* Seek to start title/seekpoint */
                    val.i_int = p_input->input.i_title_start -
                        p_input->input.i_title_offset;
                    if( val.i_int < 0 || val.i_int >= p_input->input.i_title )
                        val.i_int = 0;
                    input_ControlPush( p_input,
                                       INPUT_CONTROL_SET_TITLE, &val );

                    val.i_int = p_input->input.i_seekpoint_start -
                        p_input->input.i_seekpoint_offset;
                    if( val.i_int > 0 /* TODO: check upper boundary */ )
                        input_ControlPush( p_input,
                                           INPUT_CONTROL_SET_SEEKPOINT, &val );

                    /* Seek to start position */
                    if( p_input->i_start > 0 )
                    {
                        val.i_time = p_input->i_start;
                        input_ControlPush( p_input, INPUT_CONTROL_SET_TIME,
                                           &val );
                    }
                    else
                    {
                        val.f_float = 0.0;
                        input_ControlPush( p_input, INPUT_CONTROL_SET_POSITION,
                                           &val );
                    }
                }
            }
            else if( i_ret < 0 )
            {
                p_input->b_error = VLC_TRUE;
            }

            if( i_ret > 0 && p_input->i_slave > 0 )
            {
                SlaveDemux( p_input );
            }
        }
        else
        {
            /* Small wait */
            msleep( 10*1000 );
        }

        /* Handle control */
        vlc_mutex_lock( &p_input->lock_control );
        ControlReduce( p_input );
        while( !ControlPopNoLock( p_input, &i_type, &val ) )
        {
            msg_Dbg( p_input, "control type=%d", i_type );
            if( Control( p_input, i_type, val ) )
                b_force_update = VLC_TRUE;
        }
        vlc_mutex_unlock( &p_input->lock_control );

        if( b_force_update || i_intf_update < mdate() )
        {
            vlc_value_t val;
            double f_pos;
            int64_t i_time, i_length;
            /* update input status variables */
            if( !demux2_Control( p_input->input.p_demux,
                                 DEMUX_GET_POSITION, &f_pos ) )
            {
                val.f_float = (float)f_pos;
                var_Change( p_input, "position", VLC_VAR_SETVALUE, &val, NULL );
            }
            if( !demux2_Control( p_input->input.p_demux,
                                 DEMUX_GET_TIME, &i_time ) )
            {
                p_input->i_time = i_time;
                val.i_time = i_time;
                var_Change( p_input, "time", VLC_VAR_SETVALUE, &val, NULL );
            }
            if( !demux2_Control( p_input->input.p_demux,
                                 DEMUX_GET_LENGTH, &i_length ) )
            {
                vlc_value_t old_val;
                var_Get( p_input, "length", &old_val );
                val.i_time = i_length;
                var_Change( p_input, "length", VLC_VAR_SETVALUE, &val, NULL );

                if( old_val.i_time != val.i_time )
                {
                    UpdateItemLength( p_input, i_length, VLC_TRUE );
                }
            }

            var_SetBool( p_input, "intf-change", VLC_TRUE );
            i_intf_update = mdate() + I64C(150000);
        }
    }

    if( !p_input->b_eof && !p_input->b_error && p_input->input.b_eof )
    {
        /* We have finish to demux data but not to play them */
        while( !p_input->b_die )
        {
            if( input_EsOutDecodersEmpty( p_input->p_es_out ) )
                break;

            msg_Dbg( p_input, "waiting decoder fifos to empty" );

            msleep( INPUT_IDLE_SLEEP );
        }

        /* We have finished */
        p_input->b_eof = VLC_TRUE;
    }

    /* Wait we are asked to die */
    if( !p_input->b_die )
    {
        Error( p_input );
    }

    /* Clean up */
    End( p_input );

    return 0;
}


static int Init( input_thread_t * p_input, vlc_bool_t b_quick )
{
    char *psz;
    char *psz_subtitle;
    vlc_value_t val;
    double f_fps;
    vlc_meta_t *p_meta, *p_meta_tmp;
    int i_es_out_mode;
    int i, i_delay;

    /* Initialize optional stream output. (before access/demuxer)
     * XXX: we add a special case if the uri starts by vlc.
     * else 'vlc in.file --sout "" vlc:quit'  cannot work (the output will
     * be destroyed in case of a file).
     * (this will break playing of file starting by 'vlc:' but I don't
     * want to add more logic, just force file by file:// or code it ;)
     */
    if( !b_quick )
    {
        psz = var_GetString( p_input, "sout" );
        if( *psz && strncasecmp( p_input->input.p_item->psz_uri, "vlc:", 4 ) )
        {
            p_input->p_sout = sout_NewInstance( p_input, psz );
            if( p_input->p_sout == NULL )
            {
                msg_Err( p_input, "cannot start stream output instance, " \
                                  "aborting" );
                free( psz );
                return VLC_EGENERIC;
            }
        }
        free( psz );
    }

    /* Create es out */
    p_input->p_es_out = input_EsOutNew( p_input );
    es_out_Control( p_input->p_es_out, ES_OUT_SET_ACTIVE, VLC_FALSE );
    es_out_Control( p_input->p_es_out, ES_OUT_SET_MODE, ES_OUT_MODE_NONE );

    if( InputSourceInit( p_input, &p_input->input,
                         p_input->input.p_item->psz_uri, NULL, b_quick ) )
    {
        goto error;
    }

    /* Create global title (from master) */
    if( !b_quick )
    {
        p_input->i_title = p_input->input.i_title;
        p_input->title   = p_input->input.title;
        p_input->i_title_offset = p_input->input.i_title_offset;
        p_input->i_seekpoint_offset = p_input->input.i_seekpoint_offset;
        if( p_input->i_title > 0 )
        {
            /* Setup variables */
            input_ControlVarNavigation( p_input );
            input_ControlVarTitle( p_input, 0 );
        }

        /* Global flag */
        p_input->b_can_pace_control = p_input->input.b_can_pace_control;
        p_input->b_can_pause        = p_input->input.b_can_pause;

        /* Fix pts delay */
        if( p_input->i_pts_delay <= 0 )
            p_input->i_pts_delay = DEFAULT_PTS_DELAY;

        /* If the desynchronisation requested by the user is < 0, we need to
         * cache more data. */
        var_Get( p_input, "audio-desync", &val );
        if( val.i_int < 0 ) p_input->i_pts_delay -= (val.i_int * 1000);

        /* Update cr_average depending on the caching */
        p_input->input.i_cr_average *= (10 * p_input->i_pts_delay / 200000);
        p_input->input.i_cr_average /= 10;
        if( p_input->input.i_cr_average <= 0 ) p_input->input.i_cr_average = 1;
    }

    /* Load master infos */
    /* Init length */
    if( !demux2_Control( p_input->input.p_demux, DEMUX_GET_LENGTH,
                         &val.i_time ) && val.i_time > 0 )
    {
        var_Change( p_input, "length", VLC_VAR_SETVALUE, &val, NULL );
        UpdateItemLength( p_input, val.i_time, b_quick );
        p_input->input.p_item->i_duration = val.i_time;
    }

    /* Start title/chapter */
    if( !b_quick )
    {
        val.i_int = p_input->input.i_title_start -
                    p_input->input.i_title_offset;
        if( val.i_int > 0 && val.i_int < p_input->input.i_title )
            input_ControlPush( p_input, INPUT_CONTROL_SET_TITLE, &val );
        val.i_int = p_input->input.i_seekpoint_start -
                    p_input->input.i_seekpoint_offset;
        if( val.i_int > 0 /* TODO: check upper boundary */ )
            input_ControlPush( p_input, INPUT_CONTROL_SET_SEEKPOINT, &val );

        /* Start time*/
        /* Set start time */
        p_input->i_start = (int64_t)var_GetInteger( p_input, "start-time" ) *
                           I64C(1000000);
        p_input->i_stop  = (int64_t)var_GetInteger( p_input, "stop-time" ) *
                           I64C(1000000);

        if( p_input->i_start > 0 )
        {
            if( p_input->i_start >= val.i_time )
            {
                msg_Warn( p_input, "invalid start-time ignored" );
            }
            else
            {
                vlc_value_t s;

                msg_Dbg( p_input, "starting at time: %ds",
                                  (int)( p_input->i_start / I64C(1000000) ) );

                s.i_time = p_input->i_start;
                input_ControlPush( p_input, INPUT_CONTROL_SET_TIME, &s );
            }
        }
        if( p_input->i_stop > 0 && p_input->i_stop <= p_input->i_start )
        {
            msg_Warn( p_input, "invalid stop-time ignored" );
            p_input->i_stop = 0;
        }


        /* Load subtitles */
        /* Get fps and set it if not already set */
        if( !demux2_Control( p_input->input.p_demux, DEMUX_GET_FPS, &f_fps ) &&
            f_fps > 1.0 )
        {
            float f_requested_fps;

            var_Create( p_input, "sub-original-fps", VLC_VAR_FLOAT );
            var_SetFloat( p_input, "sub-original-fps", f_fps );

            f_requested_fps = var_CreateGetFloat( p_input, "sub-fps" );
            if( f_requested_fps != f_fps )
            {
                var_Create( p_input, "sub-fps", VLC_VAR_FLOAT|
                                                VLC_VAR_DOINHERIT );
                var_SetFloat( p_input, "sub-fps", f_requested_fps );
            }
        }

        i_delay = var_CreateGetInteger( p_input, "sub-delay" );
        if( i_delay != 0 )
        {
            var_SetTime( p_input, "spu-delay", (mtime_t)i_delay * 100000 );
        }