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 *****************************************************************************/
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 H264 stream.")
47 set_shortname( "H264");
48 set_category( CAT_INPUT );
49 set_subcategory( SUBCAT_INPUT_DEMUX );
50 set_description( _("H264 video demuxer" ) );
51 set_capability( "demux", 0 );
52 add_float( "h264-fps", 25.0, NULL, FPS_TEXT, FPS_LONGTEXT, true );
53 set_callbacks( Open, Close );
54 add_shortcut( "h264" );
57 /*****************************************************************************
59 *****************************************************************************/
66 decoder_t *p_packetizer;
69 static int Demux( demux_t * );
70 static int Control( demux_t *, int, va_list );
72 #define H264_PACKET_SIZE 2048
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, 5 ) < 5 ) return VLC_EGENERIC;
86 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
87 p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
88 (p_peek[4]&0x1F) != 7 ) /* SPS */
90 if( !p_demux->b_force )
92 msg_Warn( p_demux, "h264 module discarded (no startcode)" );
96 msg_Err( p_demux, "this doesn't look like a H264 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 ) );
105 var_Create( p_demux, "h264-fps", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT );
106 var_Get( p_demux, "h264-fps", &val );
107 p_sys->f_fps = val.f_float;
108 if( val.f_float < 0.001 ) p_sys->f_fps = 0.001;
109 msg_Dbg( p_demux, "using %.2f fps", p_sys->f_fps );
111 /* Load the mpegvideo packetizer */
112 INIT_VPACKETIZER( p_sys->p_packetizer, 'h', '2', '6', '4' );
113 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
114 LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "H264" );
119 /*****************************************************************************
120 * Close: frees unused data
121 *****************************************************************************/
122 static void Close( vlc_object_t * p_this )
124 demux_t *p_demux = (demux_t*)p_this;
125 demux_sys_t *p_sys = p_demux->p_sys;
127 DESTROY_PACKETIZER( p_sys->p_packetizer );
132 /*****************************************************************************
133 * Demux: reads and demuxes data packets
134 *****************************************************************************
135 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
136 *****************************************************************************/
137 static int Demux( demux_t *p_demux)
139 demux_sys_t *p_sys = p_demux->p_sys;
140 block_t *p_block_in, *p_block_out;
142 if( ( p_block_in = stream_Block( p_demux->s, H264_PACKET_SIZE ) ) == NULL )
147 /* m4v demuxer doesn't set pts/dts at all */
148 p_block_in->i_dts = 1;
149 p_block_in->i_pts = 1;
151 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
155 block_t *p_next = p_block_out->p_next;
157 p_block_out->p_next = NULL;
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 );
166 p_block_out->i_dts = p_sys->i_dts;
167 p_block_out->i_pts = p_sys->i_dts;
169 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
171 p_block_out = p_next;
173 p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
179 /*****************************************************************************
181 *****************************************************************************/
182 static int Control( demux_t *p_demux, int i_query, va_list args )
184 /* demux_sys_t *p_sys = p_demux->p_sys; */
185 /* FIXME calculate the bitrate */
186 if( i_query == DEMUX_SET_TIME )
189 return demux_vaControlHelper( p_demux->s,
191 0, 1, i_query, args );