1 /*****************************************************************************
2 * m4v.c : MPEG-4 Video demuxer
3 *****************************************************************************
4 * Copyright (C) 2002-2004 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc_demux.h>
31 #include "vlc_codec.h"
33 /*****************************************************************************
35 *****************************************************************************/
36 static int Open ( vlc_object_t * );
37 static void Close( vlc_object_t * );
40 set_category( CAT_INPUT );
41 set_subcategory( SUBCAT_INPUT_DEMUX );
42 set_description( _("MPEG-4 video demuxer" ) );
43 set_capability( "demux2", 0 );
44 set_callbacks( Open, Close );
45 add_shortcut( "m4v" );
46 add_shortcut( "mp4v" );
49 /*****************************************************************************
51 *****************************************************************************/
57 decoder_t *p_packetizer;
60 static int Demux( demux_t * );
61 static int Control( demux_t *, int, va_list );
63 #define M4V_PACKET_SIZE 4096
65 /*****************************************************************************
66 * Open: initializes demux structures
67 *****************************************************************************/
68 static int Open( vlc_object_t * p_this )
70 demux_t *p_demux = (demux_t*)p_this;
74 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
76 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 || p_peek[2] != 0x01 )
78 if( !p_demux->b_force )
80 msg_Warn( p_demux, "m4v module discarded (no startcode)" );
84 msg_Warn( p_demux, "this doesn't look like an MPEG-4 ES stream, "
85 "continuing anyway" );
88 p_demux->pf_demux = Demux;
89 p_demux->pf_control= Control;
90 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
94 /* Load the mpeg4video packetizer */
95 INIT_VPACKETIZER( p_sys->p_packetizer, 'm', 'p', '4', 'v' );
96 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
98 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "mpeg4 video" );
100 /* We need to wait until we get p_extra (VOL header) from the packetizer
101 * before we create the output */
106 /*****************************************************************************
107 * Close: frees unused data
108 *****************************************************************************/
109 static void Close( vlc_object_t * p_this )
111 demux_t *p_demux = (demux_t*)p_this;
112 demux_sys_t *p_sys = p_demux->p_sys;
114 DESTROY_PACKETIZER( p_sys->p_packetizer) ;
119 /*****************************************************************************
120 * Demux: reads and demuxes data packets
121 *****************************************************************************
122 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
123 *****************************************************************************/
124 static int Demux( demux_t *p_demux)
126 demux_sys_t *p_sys = p_demux->p_sys;
127 block_t *p_block_in, *p_block_out;
129 if( ( p_block_in = stream_Block( p_demux->s, M4V_PACKET_SIZE ) ) == NULL )
134 /* m4v demuxer doesn't set pts/dts at all */
135 p_block_in->i_dts = p_sys->i_dts;
136 p_block_in->i_pts = 0;
138 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
142 block_t *p_next = p_block_out->p_next;
144 if( p_sys->p_es == NULL )
146 p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
147 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
150 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
152 p_block_out->p_next = NULL;
153 if( p_block_out->i_pts == p_block_out->i_dts )
155 p_block_out->i_pts = p_sys->i_dts;
159 p_block_out->i_pts = 0;
161 p_block_out->i_dts = p_sys->i_dts;
163 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
165 p_block_out = p_next;
167 /* FIXME FIXME FIXME FIXME */
168 p_sys->i_dts += (mtime_t)1000000 / 25;
169 /* FIXME FIXME FIXME FIXME */
175 /*****************************************************************************
177 *****************************************************************************/
178 static int Control( demux_t *p_demux, int i_query, va_list args )
180 /* demux_sys_t *p_sys = p_demux->p_sys; */
181 /* FIXME calculate the bitrate */
182 if( i_query == DEMUX_SET_TIME )
185 return demux2_vaControlHelper( p_demux->s,
187 0, 1, i_query, args );