1 /*****************************************************************************
2 * h264.c : H264 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 H264 stream.")
43 set_shortname( "H264");
44 set_category( CAT_INPUT );
45 set_subcategory( SUBCAT_INPUT_DEMUX );
46 set_description( _("H264 video demuxer" ) );
47 set_capability( "demux2", 0 );
48 add_float( "h264-fps", 25.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
49 set_callbacks( Open, Close );
50 add_shortcut( "h264" );
53 /*****************************************************************************
55 *****************************************************************************/
62 decoder_t *p_packetizer;
65 static int Demux( demux_t * );
66 static int Control( demux_t *, int, va_list );
68 #define H264_PACKET_SIZE 2048
70 /*****************************************************************************
71 * Open: initializes demux structures
72 *****************************************************************************/
73 static int Open( vlc_object_t * p_this )
75 demux_t *p_demux = (demux_t*)p_this;
77 const uint8_t *p_peek;
80 if( stream_Peek( p_demux->s, &p_peek, 5 ) < 5 ) return VLC_EGENERIC;
82 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
83 p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
84 (p_peek[4]&0x1F) != 7 ) /* SPS */
86 if( !p_demux->b_force )
88 msg_Warn( p_demux, "h264 module discarded (no startcode)" );
92 msg_Err( p_demux, "this doesn't look like a H264 ES stream, "
93 "continuing anyway" );
96 p_demux->pf_demux = Demux;
97 p_demux->pf_control= Control;
98 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
101 var_Create( p_demux, "h264-fps", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT );
102 var_Get( p_demux, "h264-fps", &val );
103 p_sys->f_fps = val.f_float;
104 if( val.f_float < 0.001 ) p_sys->f_fps = 0.001;
105 msg_Dbg( p_demux, "using %.2f fps", p_sys->f_fps );
107 /* Load the mpegvideo packetizer */
108 INIT_VPACKETIZER( p_sys->p_packetizer, 'h', '2', '6', '4' );
109 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
110 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "H264" );
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, H264_PACKET_SIZE ) ) == NULL )
143 /* m4v demuxer doesn't set pts/dts at all */
144 p_block_in->i_dts = 1;
145 p_block_in->i_pts = 1;
147 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
151 block_t *p_next = p_block_out->p_next;
153 p_block_out->p_next = NULL;
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 );
162 p_block_out->i_dts = p_sys->i_dts;
163 p_block_out->i_pts = p_sys->i_dts;
165 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
167 p_block_out = p_next;
169 p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
175 /*****************************************************************************
177 *****************************************************************************/
178 static int Control( demux_t *p_demux, int i_query, va_list args )
180 /* demux_sys_t *p_sys = p_demux->p_sys; */
181 /* FIXME calculate the bitrate */
182 if( i_query == DEMUX_SET_TIME )
185 return demux2_vaControlHelper( p_demux->s,
187 0, 1, i_query, args );