1 /*****************************************************************************
2 * vc1.c : VC1 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_("Desired frame rate for the VC-1 stream.")
42 set_shortname( "VC-1");
43 set_category( CAT_INPUT );
44 set_subcategory( SUBCAT_INPUT_DEMUX );
45 set_description( _("VC1 video demuxer" ) );
46 set_capability( "demux2", 0 );
47 add_float( "vc1-fps", 25.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
48 set_callbacks( Open, Close );
49 add_shortcut( "vc1" );
52 /*****************************************************************************
54 *****************************************************************************/
61 decoder_t *p_packetizer;
64 static int Demux( demux_t * );
65 static int Control( demux_t *, int, va_list );
67 #define VC1_PACKET_SIZE 4096
69 /*****************************************************************************
70 * Open: initializes demux structures
71 *****************************************************************************/
72 static int Open( vlc_object_t * p_this )
74 demux_t *p_demux = (demux_t*)p_this;
79 if( stream_Peek( p_demux->s, &p_peek, 5 ) < 5 ) return VLC_EGENERIC;
81 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
82 p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
83 p_peek[4] != 0x0f ) /* Sequence header */
85 if( !p_demux->b_force )
87 msg_Warn( p_demux, "vc-1 module discarded (no startcode)" );
91 msg_Err( p_demux, "this doesn't look like a VC-1 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 ) );
100 p_sys->f_fps = var_CreateGetFloat( p_demux, "vc1-fps" );
101 if( val.f_float < 0.001 ) p_sys->f_fps = 0.0;
103 /* Load the packetizer */
104 INIT_VPACKETIZER( p_sys->p_packetizer, 'W', 'V', 'C', '1' );
105 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
106 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "VC-1" );
111 /*****************************************************************************
112 * Close: frees unused data
113 *****************************************************************************/
114 static void Close( vlc_object_t * p_this )
116 demux_t *p_demux = (demux_t*)p_this;
117 demux_sys_t *p_sys = p_demux->p_sys;
119 DESTROY_PACKETIZER( p_sys->p_packetizer );
124 /*****************************************************************************
125 * Demux: reads and demuxes data packets
126 *****************************************************************************
127 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
128 *****************************************************************************/
129 static int Demux( demux_t *p_demux)
131 demux_sys_t *p_sys = p_demux->p_sys;
132 block_t *p_block_in, *p_block_out;
134 if( ( p_block_in = stream_Block( p_demux->s, VC1_PACKET_SIZE ) ) == NULL )
138 p_block_in->i_dts = 1;
139 p_block_in->i_pts = 1;
141 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
145 block_t *p_next = p_block_out->p_next;
147 p_block_out->p_next = NULL;
149 if( p_sys->p_es == NULL )
151 p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
152 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
155 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
156 p_block_out->i_dts = p_sys->i_dts;
157 p_block_out->i_pts = p_sys->i_dts;
159 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
161 p_block_out = p_next;
163 if( p_sys->p_packetizer->fmt_out.video.i_frame_rate > 0 &&
164 p_sys->p_packetizer->fmt_out.video.i_frame_rate_base > 0 )
165 p_sys->i_dts += I64C(1000000) *
166 p_sys->p_packetizer->fmt_out.video.i_frame_rate_base /
167 p_sys->p_packetizer->fmt_out.video.i_frame_rate;
168 else if( p_sys->f_fps > 0.001 )
169 p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
171 p_sys->i_dts += I64C(1000000) / 25;
177 /*****************************************************************************
179 *****************************************************************************/
180 static int Control( demux_t *p_demux, int i_query, va_list args )
182 /* demux_sys_t *p_sys = p_demux->p_sys; */
183 /* FIXME calculate the bitrate */
184 if( i_query == DEMUX_SET_TIME )
187 return demux2_vaControlHelper( p_demux->s,
189 0, 1, i_query, args );