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 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
35 #include "vlc_codec.h"
37 /*****************************************************************************
39 *****************************************************************************/
40 static int Open ( vlc_object_t * );
41 static void Close( vlc_object_t * );
43 #define FPS_TEXT N_("Frames per Second")
44 #define FPS_LONGTEXT N_("This is the desired frame rate when " \
45 "playing MPEG4 video elementary streams.")
48 set_category( CAT_INPUT )
49 set_subcategory( SUBCAT_INPUT_DEMUX )
50 set_description( N_("MPEG-4 video demuxer" ) )
51 set_shortname( N_("MPEG-4 V") )
52 set_capability( "demux", 0 )
53 set_callbacks( Open, Close )
55 add_shortcut( "mp4v" )
56 add_float( "m4v-fps", 25, NULL, FPS_TEXT, FPS_LONGTEXT, false )
59 /*****************************************************************************
61 *****************************************************************************/
68 decoder_t *p_packetizer;
71 static int Demux( demux_t * );
72 static int Control( demux_t *, int, va_list );
74 #define M4V_PACKET_SIZE 4096
76 /*****************************************************************************
77 * Open: initializes demux structures
78 *****************************************************************************/
79 static int Open( vlc_object_t * p_this )
81 demux_t *p_demux = (demux_t*)p_this;
83 const uint8_t *p_peek;
86 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
88 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 || p_peek[2] != 0x01 )
90 if( !p_demux->b_force )
92 msg_Warn( p_demux, "m4v module discarded (no startcode)" );
96 msg_Warn( p_demux, "this doesn't look like an MPEG-4 ES stream, "
97 "continuing anyway" );
100 p_demux->pf_demux = Demux;
101 p_demux->pf_control= Control;
102 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
106 /* Load the mpeg4video packetizer */
107 es_format_Init( &fmt, VIDEO_ES, VLC_FOURCC( 'm', 'p', '4', 'v' ) );
108 p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, "mpeg4 video" );
109 if( !p_sys->p_packetizer )
115 /* We need to wait until we get p_extra (VOL header) from the packetizer
116 * before we create the output */
117 p_sys->f_fps = var_CreateGetFloat( p_demux, "m4v-fps" );
122 /*****************************************************************************
123 * Close: frees unused data
124 *****************************************************************************/
125 static void Close( vlc_object_t * p_this )
127 demux_t *p_demux = (demux_t*)p_this;
128 demux_sys_t *p_sys = p_demux->p_sys;
130 demux_PacketizerDestroy( p_sys->p_packetizer );
134 /*****************************************************************************
135 * Demux: reads and demuxes data packets
136 *****************************************************************************
137 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
138 *****************************************************************************/
139 static int Demux( demux_t *p_demux)
141 demux_sys_t *p_sys = p_demux->p_sys;
142 block_t *p_block_in, *p_block_out;
144 if( ( p_block_in = stream_Block( p_demux->s, M4V_PACKET_SIZE ) ) == NULL )
149 /* m4v demuxer doesn't set pts/dts at all */
150 p_block_in->i_dts = p_sys->i_dts;
151 p_block_in->i_pts = 0;
153 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
157 block_t *p_next = p_block_out->p_next;
159 if( p_sys->p_es == NULL )
161 p_sys->p_packetizer->fmt_out.b_packetized = true;
162 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
165 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
167 p_block_out->p_next = NULL;
168 if( p_block_out->i_pts == p_block_out->i_dts )
170 p_block_out->i_pts = p_sys->i_dts;
174 p_block_out->i_pts = 0;
176 p_block_out->i_dts = p_sys->i_dts;
178 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
180 p_block_out = p_next;
182 /* FIXME FIXME FIXME FIXME */
183 p_sys->i_dts += (mtime_t)1000000 / p_sys->f_fps;
184 /* FIXME FIXME FIXME FIXME */
190 /*****************************************************************************
192 *****************************************************************************/
193 static int Control( demux_t *p_demux, int i_query, va_list args )
195 /* demux_sys_t *p_sys = p_demux->p_sys; */
196 /* FIXME calculate the bitrate */
197 if( i_query == DEMUX_SET_TIME )
200 return demux_vaControlHelper( p_demux->s,
202 0, 1, i_query, args );