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 *****************************************************************************/
29 #include <vlc_demux.h>
30 #include "vlc_codec.h"
32 /*****************************************************************************
34 *****************************************************************************/
35 static int Open ( vlc_object_t * );
36 static void Close( vlc_object_t * );
38 #define FPS_TEXT N_("Frames per Second")
39 #define FPS_LONGTEXT N_("This is the desired frame rate when " \
40 "playing MPEG4 video elementary streams.")
43 set_category( CAT_INPUT );
44 set_subcategory( SUBCAT_INPUT_DEMUX );
45 set_description( _("MPEG-4 video demuxer" ) );
46 set_capability( "demux2", 0 );
47 set_callbacks( Open, Close );
48 add_shortcut( "m4v" );
49 add_shortcut( "mp4v" );
50 add_float( "m4v-fps", 25, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_FALSE );
54 /*****************************************************************************
56 *****************************************************************************/
63 decoder_t *p_packetizer;
66 static int Demux( demux_t * );
67 static int Control( demux_t *, int, va_list );
69 #define M4V_PACKET_SIZE 4096
71 /*****************************************************************************
72 * Open: initializes demux structures
73 *****************************************************************************/
74 static int Open( vlc_object_t * p_this )
76 demux_t *p_demux = (demux_t*)p_this;
78 const uint8_t *p_peek;
81 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
83 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 || p_peek[2] != 0x01 )
85 if( !p_demux->b_force )
87 msg_Warn( p_demux, "m4v module discarded (no startcode)" );
91 msg_Warn( p_demux, "this doesn't look like an MPEG-4 ES stream, "
92 "continuing anyway" );
95 p_demux->pf_demux = Demux;
96 p_demux->pf_control= Control;
97 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
101 /* Load the mpeg4video packetizer */
102 INIT_VPACKETIZER( p_sys->p_packetizer, 'm', 'p', '4', 'v' );
103 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
105 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "mpeg4 video" );
107 /* We need to wait until we get p_extra (VOL header) from the packetizer
108 * before we create the output */
110 var_Create( p_demux, "m4v-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
111 var_Get( p_demux, "m4v-fps", &val );
112 p_sys->f_fps = val.f_float;
117 /*****************************************************************************
118 * Close: frees unused data
119 *****************************************************************************/
120 static void Close( vlc_object_t * p_this )
122 demux_t *p_demux = (demux_t*)p_this;
123 demux_sys_t *p_sys = p_demux->p_sys;
125 DESTROY_PACKETIZER( p_sys->p_packetizer) ;
130 /*****************************************************************************
131 * Demux: reads and demuxes data packets
132 *****************************************************************************
133 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
134 *****************************************************************************/
135 static int Demux( demux_t *p_demux)
137 demux_sys_t *p_sys = p_demux->p_sys;
138 block_t *p_block_in, *p_block_out;
140 if( ( p_block_in = stream_Block( p_demux->s, M4V_PACKET_SIZE ) ) == NULL )
145 /* m4v demuxer doesn't set pts/dts at all */
146 p_block_in->i_dts = p_sys->i_dts;
147 p_block_in->i_pts = 0;
149 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
153 block_t *p_next = p_block_out->p_next;
155 if( p_sys->p_es == NULL )
157 p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
158 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
161 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
163 p_block_out->p_next = NULL;
164 if( p_block_out->i_pts == p_block_out->i_dts )
166 p_block_out->i_pts = p_sys->i_dts;
170 p_block_out->i_pts = 0;
172 p_block_out->i_dts = p_sys->i_dts;
174 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
176 p_block_out = p_next;
178 /* FIXME FIXME FIXME FIXME */
179 p_sys->i_dts += (mtime_t)1000000 / p_sys->f_fps;
180 /* FIXME FIXME FIXME FIXME */
186 /*****************************************************************************
188 *****************************************************************************/
189 static int Control( demux_t *p_demux, int i_query, va_list args )
191 /* demux_sys_t *p_sys = p_demux->p_sys; */
192 /* FIXME calculate the bitrate */
193 if( i_query == DEMUX_SET_TIME )
196 return demux2_vaControlHelper( p_demux->s,
198 0, 1, i_query, args );