demuxdump.c 6.35 KB
Newer Older
1 2 3
/*****************************************************************************
 * demuxdump.c : Pseudo demux module for vlc (dump raw stream)
 *****************************************************************************
4
 * Copyright (C) 2001-2004 the VideoLAN team
5
 * $Id$
6 7 8 9 10 11 12
 *
 * 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.
13
 *
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
 * 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 <string.h>                                              /* strdup() */
#include <errno.h>

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

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
Derk-Jan Hartman's avatar
Derk-Jan Hartman committed
37
#define FILE_TEXT N_("Filename of dump")
Gildas Bazin's avatar
 
Gildas Bazin committed
38
#define FILE_LONGTEXT N_( \
Christophe Massiot's avatar
Christophe Massiot committed
39
    "Specify a file name to which the raw stream will be dumped." )
40 41 42 43
#define APPEND_TEXT N_("Append")
#define APPEND_LONGTEXT N_( \
    "If the file exists and this option is selected, the existing file " \
    "will not be overwritten." )
Gildas Bazin's avatar
 
Gildas Bazin committed
44

45 46 47
static int  Open( vlc_object_t * );
static void Close ( vlc_object_t * );

48
vlc_module_begin();
49
    set_shortname("Dump");
Clément Stenac's avatar
Clément Stenac committed
50 51
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_DEMUX );
Derk-Jan Hartman's avatar
Derk-Jan Hartman committed
52
    set_description( _("Filedump demuxer") );
53 54
    set_capability( "demux2", 0 );
    add_file( "demuxdump-file", "stream-demux.dump", NULL, FILE_TEXT,
Derk-Jan Hartman's avatar
Derk-Jan Hartman committed
55
              FILE_LONGTEXT, VLC_FALSE );
56 57
    add_bool( "demuxdump-append", 0, NULL, APPEND_TEXT, APPEND_LONGTEXT,
              VLC_FALSE );
58
    set_callbacks( Open, Close );
59 60 61
    add_shortcut( "dump" );
vlc_module_end();

62 63 64 65 66 67 68 69 70

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int Demux( demux_t * );
static int Control( demux_t *, int,va_list );

#define DUMP_BLOCKSIZE  16384

71 72
struct demux_sys_t
{
73
    char        *psz_file;
74 75 76
    FILE        *p_file;
    uint64_t    i_write;

77
    uint8_t     buffer[DUMP_BLOCKSIZE];
78 79 80 81 82 83 84
};

/*
 * Data reading functions
 */

/*****************************************************************************
85
 * Open: initializes dump structures
86
 *****************************************************************************/
87
static int Open( vlc_object_t * p_this )
88
{
89 90
    demux_t     *p_demux = (demux_t*)p_this;
    demux_sys_t *p_sys;
91 92 93
    char        *psz_mode;
    vlc_value_t val;
    vlc_bool_t  b_append;
94

95 96
    /* Accept only if forced */
    if( strcasecmp( p_demux->psz_demux, "dump" ) )
Gildas Bazin's avatar
 
Gildas Bazin committed
97
        return VLC_EGENERIC;
98

99 100 101 102 103 104 105 106
    var_Create( p_demux, "demuxdump-append", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
    var_Get( p_demux, "demuxdump-append", &val );
    b_append = val.b_bool;
    if ( b_append )
        psz_mode = "ab";
    else
        psz_mode = "wb";

107 108 109 110 111 112 113
    p_demux->pf_demux = Demux;
    p_demux->pf_control = Control;
    p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
    p_sys->i_write = 0;
    p_sys->p_file = NULL;
    p_sys->psz_file = var_CreateGetString( p_demux, "demuxdump-file" );
    if( *p_sys->psz_file == '\0' )
114
    {
115
        msg_Warn( p_demux, "no dump file name given" );
Gildas Bazin's avatar
 
Gildas Bazin committed
116
        return VLC_EGENERIC;
117
    }
118

119
    if( !strcmp( p_sys->psz_file, "-" ) )
120
    {
121 122
        msg_Info( p_demux, "dumping raw stream to standard output" );
        p_sys->p_file = stdout;
123
    }
124
    else if( ( p_sys->p_file = fopen( p_sys->psz_file, psz_mode ) ) == NULL )
125
    {
126
        msg_Err( p_demux, "cannot create `%s' for writing", p_sys->psz_file );
127

128 129
        free( p_sys );
        return VLC_EGENERIC;
130
    }
131 132
    msg_Info( p_demux, "%s raw stream to file `%s'",
              b_append ? "appending" : "dumping", p_sys->psz_file );
133

Gildas Bazin's avatar
 
Gildas Bazin committed
134
    return VLC_SUCCESS;
135 136 137
}

/*****************************************************************************
138
 * Close:
139
 *****************************************************************************/
140
static void Close( vlc_object_t *p_this )
141
{
142

143 144
    demux_t     *p_demux = (demux_t*)p_this;
    demux_sys_t *p_sys = p_demux->p_sys;
145

146 147 148 149
    msg_Info( p_demux ,"closing %s ("I64Fd" Kbytes dumped)", p_sys->psz_file,
              p_sys->i_write / 1024 );

    if( p_sys->p_file != stdout )
150
    {
151
        fclose( p_sys->p_file );
152
    }
153 154 155
    free( p_sys->psz_file );

    free( p_sys );
156 157 158 159 160 161 162
}

/*****************************************************************************
 * Demux: reads and demuxes data packets
 *****************************************************************************
 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 *****************************************************************************/
163
static int Demux( demux_t *p_demux )
164
{
165
    demux_sys_t *p_sys = p_demux->p_sys;
166

167
    int i_data;
168

169 170 171 172
    /* I'm pretty sure that stream_Peek,stream_Read( , NULL ) would be faster*/
    i_data = stream_Read( p_demux->s, p_sys->buffer, DUMP_BLOCKSIZE );
    if ( i_data <= 0 )
        return i_data;
173

174
    i_data = fwrite( p_sys->buffer, 1, i_data, p_sys->p_file );
175

176
    if( i_data == 0 )
177
    {
178 179
        msg_Err( p_demux, "failed to write data" );
        return -1;
180
    }
181
#if 0
182
    msg_Dbg( p_demux, "dumped %d bytes", i_data );
183
#endif
184

185
    p_sys->i_write += i_data;
186

187 188
    return 1;
}
189

190 191 192 193 194 195
/*****************************************************************************
 * Demux: reads and demuxes data packets
 *****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
    return demux2_vaControlHelper( p_demux->s, 0, -1, 0, 1, i_query, args );
196
}
197