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 *****************************************************************************/
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_("Desired frame rate for the VC-1 stream.")
46 set_shortname( "VC-1");
47 set_category( CAT_INPUT );
48 set_subcategory( SUBCAT_INPUT_DEMUX );
49 set_description( _("VC1 video demuxer" ) );
50 set_capability( "demux2", 0 );
51 add_float( "vc1-fps", 25.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
52 set_callbacks( Open, Close );
53 add_shortcut( "vc1" );
56 /*****************************************************************************
58 *****************************************************************************/
65 decoder_t *p_packetizer;
68 static int Demux( demux_t * );
69 static int Control( demux_t *, int, va_list );
71 #define VC1_PACKET_SIZE 4096
73 /*****************************************************************************
74 * Open: initializes demux structures
75 *****************************************************************************/
76 static int Open( vlc_object_t * p_this )
78 demux_t *p_demux = (demux_t*)p_this;
80 const uint8_t *p_peek;
83 if( stream_Peek( p_demux->s, &p_peek, 5 ) < 5 ) return VLC_EGENERIC;
85 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
86 p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
87 p_peek[4] != 0x0f ) /* Sequence header */
89 if( !p_demux->b_force )
91 msg_Warn( p_demux, "vc-1 module discarded (no startcode)" );
95 msg_Err( p_demux, "this doesn't look like a VC-1 ES stream, "
96 "continuing anyway" );
99 p_demux->pf_demux = Demux;
100 p_demux->pf_control= Control;
101 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
104 p_sys->f_fps = var_CreateGetFloat( p_demux, "vc1-fps" );
105 if( val.f_float < 0.001 ) p_sys->f_fps = 0.0;
107 /* Load the packetizer */
108 INIT_VPACKETIZER( p_sys->p_packetizer, 'W', 'V', 'C', '1' );
109 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
110 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "VC-1" );
115 /*****************************************************************************
116 * Close: frees unused data
117 *****************************************************************************/
118 static void Close( vlc_object_t * p_this )
120 demux_t *p_demux = (demux_t*)p_this;
121 demux_sys_t *p_sys = p_demux->p_sys;
123 DESTROY_PACKETIZER( p_sys->p_packetizer );
128 /*****************************************************************************
129 * Demux: reads and demuxes data packets
130 *****************************************************************************
131 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
132 *****************************************************************************/
133 static int Demux( demux_t *p_demux)
135 demux_sys_t *p_sys = p_demux->p_sys;
136 block_t *p_block_in, *p_block_out;
138 if( ( p_block_in = stream_Block( p_demux->s, VC1_PACKET_SIZE ) ) == NULL )
142 p_block_in->i_dts = 1;
143 p_block_in->i_pts = 1;
145 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
149 block_t *p_next = p_block_out->p_next;
151 p_block_out->p_next = NULL;
153 if( p_sys->p_es == NULL )
155 p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
156 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
159 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
160 p_block_out->i_dts = p_sys->i_dts;
161 p_block_out->i_pts = 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 if( p_sys->p_packetizer->fmt_out.video.i_frame_rate > 0 &&
168 p_sys->p_packetizer->fmt_out.video.i_frame_rate_base > 0 )
169 p_sys->i_dts += I64C(1000000) *
170 p_sys->p_packetizer->fmt_out.video.i_frame_rate_base /
171 p_sys->p_packetizer->fmt_out.video.i_frame_rate;
172 else if( p_sys->f_fps > 0.001 )
173 p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
175 p_sys->i_dts += I64C(1000000) / 25;
181 /*****************************************************************************
183 *****************************************************************************/
184 static int Control( demux_t *p_demux, int i_query, va_list args )
186 /* demux_sys_t *p_sys = p_demux->p_sys; */
187 /* FIXME calculate the bitrate */
188 if( i_query == DEMUX_SET_TIME )
191 return demux2_vaControlHelper( p_demux->s,
193 0, 1, i_query, args );