/***************************************************************************** * real.c: Real demuxer. ***************************************************************************** * Copyright (C) 2004, 2006-2007 the VideoLAN team * $Id$ * * Authors: Laurent Aimar <fenrir@via.ecp.fr> * * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************//** * Status of this demuxer: * Real Media format * ----------------- * * version v3 w/ 14_4/lpcJ is ok. * version v4/5: - atrac3 is ok. *               - cook is ok. *               - raac, racp are ok. *               - dnet is twisted "The byte order of the data is reversed *                                  from standard AC3" *               - 28_8 seem problematic. *               - sipr should be fine, but our decoder suxx :) *               - ralf is unsupported, but hardly any sample exist. *               - mp3 is unsupported, one sample exists... * * Real Audio Only * --------------- * v3 and v4/5 headers are parsed. * Doesn't work yet... *//***************************************************************************** * Preamble *****************************************************************************/#ifdef HAVE_CONFIG_H# include "config.h"#endif#include <vlc_common.h>#include <vlc_plugin.h>#include <vlc_demux.h>#include <vlc_charset.h>#include <vlc_meta.h>/***************************************************************************** * Module descriptor *****************************************************************************/static int  Open    ( vlc_object_t * );static void Close  ( vlc_object_t * );vlc_module_begin();    set_description( N_("Real demuxer" ) );    set_capability( "demux", 15 );    set_category( CAT_INPUT );    set_subcategory( SUBCAT_INPUT_DEMUX );    set_callbacks( Open, Close );    add_shortcut( "real" );    add_shortcut( "rm" );vlc_module_end();/***************************************************************************** * Local prototypes *****************************************************************************/typedef struct{    int         i_id;    es_format_t fmt;    es_out_id_t *p_es;    int         i_frame;    block_t     *p_frame;    int         i_subpacket_h;    int         i_subpacket_size;    int         i_coded_frame_size;    int         i_frame_size;    int         i_subpacket;    int         i_subpackets;    block_t     **p_subpackets;    int64_t     *p_subpackets_timecode;    int         i_out_subpacket;} real_track_t;typedef struct{    uint32_t file_offset;    uint32_t time_offset;    uint32_t frame_index;} rm_index_t;struct demux_sys_t{    int64_t  i_data_offset;    int64_t  i_data_size;    uint32_t i_data_packets_count;    uint32_t i_data_packets;    int64_t  i_data_offset_next;    bool     b_is_real_audio;    int  i_our_duration;    int  i_mux_rate;    char* psz_title;    char* psz_artist;    char* psz_copyright;    char* psz_description;    int          i_track;    real_track_t **track;    uint8_t buffer[65536];    int64_t     i_pcr;    vlc_meta_t *p_meta;    int64_t     i_index_offset;    int         b_seek;    rm_index_t *p_index;};static int Demux( demux_t *p_demux );static int Control( demux_t *p_demux, int i_query, va_list args );static int HeaderRead( demux_t *p_demux );static const uint8_t * MetaRead( demux_t *p_demux, const uint8_t *p_peek );static int ReadCodecSpecificData( demux_t *p_demux, int i_len, int i_num );/***************************************************************************** * Open *****************************************************************************/static int Open( vlc_object_t *p_this ){    demux_t     *p_demux = (demux_t*)p_this;    demux_sys_t *p_sys;    const uint8_t *p_peek;    bool           b_is_real_audio = false;    if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return VLC_EGENERIC;    /* Real Audio */    if( !memcmp( p_peek, ".ra", 3 ) )    {        msg_Err( p_demux, ".ra files unsuported" );        b_is_real_audio = true;    }    /* Real Media Format */    else if( memcmp( p_peek, ".RMF", 4 ) ) return VLC_EGENERIC;    /* Fill p_demux field */    p_demux->pf_demux = Demux;    p_demux->pf_control = Control;    p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );    if( p_sys == NULL )        return VLC_ENOMEM;    memset( p_sys, 0, sizeof( demux_sys_t ) );    p_sys->i_data_offset = 0;    p_sys->i_track = 0;    p_sys->track   = NULL;    p_sys->i_pcr   = 1;    p_sys->b_seek  = 0;    p_sys->b_is_real_audio = b_is_real_audio;    /* Parse the headers */    /* Real Audio files */    if( b_is_real_audio )    {        ReadCodecSpecificData( p_demux, 32, 0 ); /* At least 32 */        return VLC_EGENERIC;                     /* We don't know how to read                                                    correctly the data yet */    }    /* RMF files */    else if( HeaderRead( p_demux ) )    {        int i;        msg_Err( p_demux, "invalid header" );        for( i = 0; i < p_sys->i_track; i++ )        {            real_track_t *tk = p_sys->track[i];            if( tk->p_es )            {                es_out_Del( p_demux->out, tk->p_es );            }            free( tk );        }        if( p_sys->i_track > 0 )        {            free( p_sys->track );        }        free( p_sys );        return VLC_EGENERIC;    }    return VLC_SUCCESS;}/***************************************************************************** * Close *****************************************************************************/static void Close( vlc_object_t *p_this ){    demux_t *p_demux = (demux_t*)p_this;    demux_sys_t *p_sys = p_demux->p_sys;    int i;    for( i = 0; i < p_sys->i_track; i++ )    {        real_track_t *tk = p_sys->track[i];        int j = tk->i_subpackets;        if( tk->p_frame ) block_Release( tk->p_frame );        es_format_Clean( &tk->fmt );        while(  j-- )        {            if( tk->p_subpackets[ j ] )                block_Release( tk->p_subpackets[ j ] );        }        if( tk->i_subpackets )        {            free( tk->p_subpackets );            free( tk->p_subpackets_timecode );        }        free( tk );    }    free( p_sys->psz_title );    free( p_sys->psz_artist );    free( p_sys->psz_copyright );    free( p_sys->psz_description );    free( p_sys->p_index );    if( p_sys->i_track > 0 ) free( p_sys->track );    free( p_sys );}/***************************************************************************** * Demux: *****************************************************************************/static int Demux( demux_t *p_demux ){    demux_sys_t *p_sys = p_demux->p_sys;    uint8_t     header[18];    int         i_id, i_flags, i;    unsigned int i_size;    int64_t     i_pts;    real_track_t *tk = NULL;    bool  b_selected;    if( p_sys->i_data_packets >= p_sys->i_data_packets_count &&        p_sys->i_data_packets_count )    {        if( stream_Read( p_demux->s, header, 18 ) < 18 )        {            return 0;        }        if( strncmp( (char *)header, "DATA", 4 ) )        {            return 0;        }        p_sys->i_data_offset = stream_Tell( p_demux->s ) - 18;        p_sys->i_data_size   = GetDWBE( &header[4] );        p_sys->i_data_packets_count = GetDWBE( &header[10] );        p_sys->i_data_packets = 0;        p_sys->i_data_offset_next = GetDWBE( &header[14] );        msg_Dbg( p_demux, "entering new DATA packets=%d next=%u",                 p_sys->i_data_packets_count,                 (uint32_t)p_sys->i_data_offset_next );    }    if( stream_Read( p_demux->s, header, 12 ) < 12 ) return 0;    //    int i_version = GetWBE( &header[0] );    i_size = GetWBE( &header[2] ) - 12;    i_id   = GetWBE( &header[4] );    i_pts  = 1000 * GetDWBE( &header[6] );    i_pts += 1000; /* Avoid 0 pts */    i_flags= header[11]; /* flags 0x02 -> keyframe */    msg_Dbg( p_demux, "packet %d size=%d id=%d pts=%u",             p_sys->i_data_packets, i_size, i_id, (uint32_t)(i_pts/1000) );    p_sys->i_data_packets++;    if( i_size == 0 )    {        msg_Err( p_demux, "Got a NUKK size to read. (Invalid format?)" );        return 1;    }    if( i_size > sizeof(p_sys->buffer) )    {        msg_Err( p_demux, "Got a size to read bigger than our buffer. (Invalid format?)" );        return 1;    }    stream_Read( p_demux->s, p_sys->buffer, i_size );    for( i = 0; i < p_sys->i_track; i++ )    {        if( p_sys->track[i]->i_id == i_id ) tk = p_sys->track[i];    }    if( tk == NULL )    {        msg_Warn( p_demux, "unknown track id(0x%x)", i_id );        return 1;    }    es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b_selected );    if( tk->fmt.i_cat == VIDEO_ES && b_selected )    {        uint8_t *p = p_sys->buffer;        while( p < &p_sys->buffer[i_size - 2] )        {            uint8_t h = *p++;            int     i_len = 0;            int     i_copy;            int     i_subseq = 0;            int     i_seqnum = 0;            int     i_offset = 0;            if( (h&0xc0) == 0x40 )            {                /* Short header */                p++;                i_len = &p_sys->buffer[i_size] - p;            }            else            {                if( (h&0x40) == 0 )                {                    i_subseq = (*p++)&0x7f;                }                i_len = (p[0] << 8)|p[1]; p += 2;                if( (i_len&0xc000) == 0 )                {                    i_len <<= 16;                    i_len |= (p[0] << 8)|p[1]; p += 2;                    i_len &= 0x3fffffff;                }                else                {                    i_len &= 0x3fff;                }                i_offset = (p[0] << 8)|p[1]; p += 2;                if( (i_offset&0xc000) == 0 )                {                    i_offset <<= 16;                    i_offset |= (p[0] << 8)|p[1]; p += 2;                    i_offset &= 0x3fffffff;                }                else                {                    i_offset &= 0x3fff;                }