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 *****************************************************************************/
33 #include <vlc_demux.h>
34 #include "vlc_codec.h"
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Open ( vlc_object_t * );
40 static void Close( vlc_object_t * );
42 #define FPS_TEXT N_("Frames per Second")
43 #define FPS_LONGTEXT N_("This is the desired frame rate when " \
44 "playing MPEG4 video elementary streams.")
47 set_category( CAT_INPUT );
48 set_subcategory( SUBCAT_INPUT_DEMUX );
49 set_description( _("MPEG-4 video demuxer" ) );
50 set_capability( "demux2", 0 );
51 set_callbacks( Open, Close );
52 add_shortcut( "m4v" );
53 add_shortcut( "mp4v" );
54 add_float( "m4v-fps", 25, NULL, FPS_TEXT, FPS_LONGTEXT, false );
57 /*****************************************************************************
59 *****************************************************************************/
66 decoder_t *p_packetizer;
69 static int Demux( demux_t * );
70 static int Control( demux_t *, int, va_list );
72 #define M4V_PACKET_SIZE 4096
74 /*****************************************************************************
75 * Open: initializes demux structures
76 *****************************************************************************/
77 static int Open( vlc_object_t * p_this )
79 demux_t *p_demux = (demux_t*)p_this;
81 const uint8_t *p_peek;
84 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
86 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 || p_peek[2] != 0x01 )
88 if( !p_demux->b_force )
90 msg_Warn( p_demux, "m4v module discarded (no startcode)" );
94 msg_Warn( p_demux, "this doesn't look like an MPEG-4 ES stream, "
95 "continuing anyway" );
98 p_demux->pf_demux = Demux;
99 p_demux->pf_control= Control;
100 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
104 /* Load the mpeg4video packetizer */
105 INIT_VPACKETIZER( p_sys->p_packetizer, 'm', 'p', '4', 'v' );
106 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
108 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "mpeg4 video" );
110 /* We need to wait until we get p_extra (VOL header) from the packetizer
111 * before we create the output */
113 var_Create( p_demux, "m4v-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
114 var_Get( p_demux, "m4v-fps", &val );
115 p_sys->f_fps = val.f_float;
120 /*****************************************************************************
121 * Close: frees unused data
122 *****************************************************************************/
123 static void Close( vlc_object_t * p_this )
125 demux_t *p_demux = (demux_t*)p_this;
126 demux_sys_t *p_sys = p_demux->p_sys;
128 DESTROY_PACKETIZER( p_sys->p_packetizer) ;
133 /*****************************************************************************
134 * Demux: reads and demuxes data packets
135 *****************************************************************************
136 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
137 *****************************************************************************/
138 static int Demux( demux_t *p_demux)
140 demux_sys_t *p_sys = p_demux->p_sys;
141 block_t *p_block_in, *p_block_out;
143 if( ( p_block_in = stream_Block( p_demux->s, M4V_PACKET_SIZE ) ) == NULL )
148 /* m4v demuxer doesn't set pts/dts at all */
149 p_block_in->i_dts = p_sys->i_dts;
150 p_block_in->i_pts = 0;
152 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
156 block_t *p_next = p_block_out->p_next;
158 if( p_sys->p_es == NULL )
160 p_sys->p_packetizer->fmt_out.b_packetized = true;
161 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
164 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
166 p_block_out->p_next = NULL;
167 if( p_block_out->i_pts == p_block_out->i_dts )
169 p_block_out->i_pts = p_sys->i_dts;
173 p_block_out->i_pts = 0;
175 p_block_out->i_dts = p_sys->i_dts;
177 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
179 p_block_out = p_next;
181 /* FIXME FIXME FIXME FIXME */
182 p_sys->i_dts += (mtime_t)1000000 / p_sys->f_fps;
183 /* FIXME FIXME FIXME FIXME */
189 /*****************************************************************************
191 *****************************************************************************/
192 static int Control( demux_t *p_demux, int i_query, va_list args )
194 /* demux_sys_t *p_sys = p_demux->p_sys; */
195 /* FIXME calculate the bitrate */
196 if( i_query == DEMUX_SET_TIME )
199 return demux2_vaControlHelper( p_demux->s,
201 0, 1, i_query, args );