copy.c 6.93 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227
/*****************************************************************************
 * copy.c
 *****************************************************************************
 * Copyright (C) 2001, 2002 VideoLAN
 * $Id: copy.c,v 1.1 2002/12/14 21:32:41 fenrir Exp $
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Eric Petit <titer@videolan.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <vlc/vlc.h>
#include <vlc/aout.h>
#include <vlc/decoder.h>
#include <vlc/input.h>
#include <vlc/sout.h>

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

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
typedef struct packetizer_thread_s
{
    /* Input properties */
    decoder_fifo_t          *p_fifo;

    /* Output properties */
    sout_input_t            *p_sout_input;
    sout_packet_format_t    output_format;

} packetizer_thread_t;

static int  Open    ( vlc_object_t * );
static int  Run     ( decoder_fifo_t * );

static int  InitThread     ( packetizer_thread_t * );
static void PacketizeThread   ( packetizer_thread_t * );
static void EndThread      ( packetizer_thread_t * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/

vlc_module_begin();
    set_description( _("Copy packetizer") );
    set_capability( "packetizer", 0 );
    set_callbacks( Open, NULL );
vlc_module_end();


/*****************************************************************************
 * OpenDecoder: probe the packetizer and return score
 *****************************************************************************
 * Tries to launch a decoder and return score so that the interface is able
 * to choose.
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;

    p_fifo->pf_run = Run;

    return VLC_SUCCESS;

#if 0
    if( p_fifo->i_fourcc == VLC_FOURCC( 'm', 'p', 'g', 'a') )
        ....
#endif
}

/*****************************************************************************
 * RunDecoder: this function is called just after the thread is created
 *****************************************************************************/
static int Run( decoder_fifo_t *p_fifo )
{
    packetizer_thread_t *p_pack;
    int b_error;

    msg_Info( p_fifo, "Running copy packetizer" );
    if( !( p_pack = malloc( sizeof( packetizer_thread_t ) ) ) )
    {
        msg_Err( p_fifo, "out of memory" );
        DecoderError( p_fifo );
        return( -1 );
    }
    memset( p_pack, 0, sizeof( packetizer_thread_t ) );

    p_pack->p_fifo = p_fifo;

    if( InitThread( p_pack ) != 0 )
    {
        DecoderError( p_fifo );
        return( -1 );
    }

    while( ( !p_pack->p_fifo->b_die )&&( !p_pack->p_fifo->b_error ) )
    {
        PacketizeThread( p_pack );
    }


    if( ( b_error = p_pack->p_fifo->b_error ) )
    {
        DecoderError( p_pack->p_fifo );
    }

    EndThread( p_pack );
    if( b_error )
    {
        return( -1 );
    }

    return( 0 );
}


#define FREE( p ) if( p ) free( p ); p = NULL

/*****************************************************************************
 * InitThread: initialize data before entering main loop
 *****************************************************************************/

static int InitThread( packetizer_thread_t *p_pack )
{

//    p_pack->output_format.i_cat = p_pack->p_fifo->i_cat;
    p_pack->output_format.i_fourcc = p_pack->p_fifo->i_fourcc;

    p_pack->p_sout_input = 
        sout_InputNew( p_pack->p_fifo,
                       &p_pack->output_format );

    if( !p_pack->p_sout_input )
    {
        msg_Err( p_pack->p_fifo, 
                 "cannot add a new stream" );
        return( -1 );
    }

    return( 0 );
}

/*****************************************************************************
 * PacketizeThread: packetize an unit (here copy a complete pes)
 *****************************************************************************/
static void PacketizeThread( packetizer_thread_t *p_pack )
{
    sout_buffer_t   *p_sout_buffer;
    pes_packet_t    *p_pes;
    size_t          i_size;

    /* **** get samples count **** */
    input_ExtractPES( p_pack->p_fifo, &p_pes );
    if( !p_pes )
    {
        p_pack->p_fifo->b_error = 1;
        return;
    }
    i_size = p_pes->i_pes_size;

    if( i_size > 0 )
    {
        data_packet_t   *p_data;
        size_t          i_buffer;

        p_sout_buffer = 
            sout_BufferNew( p_pack->p_sout_input->p_sout, i_size );
        if( !p_sout_buffer )
        {
            p_pack->p_fifo->b_error = 1;
            return;
        }
        /* TODO: memcpy of the pes packet */
        for( i_buffer = 0, p_data = p_pes->p_first;
             p_data != NULL && i_buffer < i_size;
             p_data = p_data->p_next)
        {
            size_t          i_copy;

            i_copy = __MIN( p_data->p_payload_end - p_data->p_payload_start, 
                            i_size - i_buffer );
            if( i_copy > 0 )
            {
                p_pack->p_fifo->p_vlc->pf_memcpy( p_sout_buffer->p_buffer + i_buffer,
                                                  p_data->p_payload_start,
                                                  i_copy );
            }
            i_buffer += i_copy;
        }

        sout_InputSendBuffer( p_pack->p_sout_input,
                               p_sout_buffer );
    }

    input_DeletePES( p_pack->p_fifo->p_packets_mgt, p_pes );
}


/*****************************************************************************
 * EndThread : packetizer thread destruction
 *****************************************************************************/
static void EndThread ( packetizer_thread_t *p_pack)
{
    if( p_pack->p_sout_input )
    {
        sout_InputDelete( p_pack->p_sout_input );
    }
}