1 /*****************************************************************************
2 * h264.c : H264 Video demuxer
3 *****************************************************************************
4 * Copyright (C) 2002-2004 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
31 #include "vlc_codec.h"
33 /*****************************************************************************
35 *****************************************************************************/
36 static int Open ( vlc_object_t * );
37 static void Close( vlc_object_t * );
40 set_category( CAT_INPUT );
41 set_subcategory( SUBCAT_INPUT_DEMUX );
42 set_description( _("H264 video demuxer" ) );
43 set_capability( "demux2", 0 );
44 add_float( "h264-fps", 25.0, NULL, "fps", "fps", VLC_TRUE );
45 set_callbacks( Open, Close );
46 add_shortcut( "h264" );
49 /*****************************************************************************
51 *****************************************************************************/
58 decoder_t *p_packetizer;
61 static int Demux( demux_t * );
62 static int Control( demux_t *, int, va_list );
64 #define H264_PACKET_SIZE 2048
66 /*****************************************************************************
67 * Open: initializes demux structures
68 *****************************************************************************/
69 static int Open( vlc_object_t * p_this )
71 demux_t *p_demux = (demux_t*)p_this;
73 vlc_bool_t b_forced = VLC_FALSE;
78 if( stream_Peek( p_demux->s, &p_peek, 5 ) < 5 )
80 msg_Err( p_demux, "cannot peek" );
84 if( !strncmp( p_demux->psz_demux, "h264", 4 ) )
89 if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
90 p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
91 (p_peek[4]&0x1F) != 7 ) /* SPS */
95 msg_Warn( p_demux, "h264 module discarded (no startcode)" );
99 msg_Err( p_demux, "this doesn't look like a H264 ES stream, continuing" );
102 p_demux->pf_demux = Demux;
103 p_demux->pf_control= Control;
104 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
107 var_Create( p_demux, "h264-fps", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT );
108 var_Get( p_demux, "h264-fps", &val );
109 p_sys->f_fps = val.f_float;
110 if( val.f_float < 0.001 )
112 p_sys->f_fps = 0.001;
114 msg_Dbg( p_demux, "using %.2f fps", p_sys->f_fps );
117 * Load the mpegvideo packetizer
119 p_sys->p_packetizer = vlc_object_create( p_demux, VLC_OBJECT_PACKETIZER );
120 p_sys->p_packetizer->pf_decode_audio = NULL;
121 p_sys->p_packetizer->pf_decode_video = NULL;
122 p_sys->p_packetizer->pf_decode_sub = NULL;
123 p_sys->p_packetizer->pf_packetize = NULL;
124 es_format_Init( &p_sys->p_packetizer->fmt_in, VIDEO_ES,
125 VLC_FOURCC( 'h', '2', '6', '4' ) );
126 es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
127 p_sys->p_packetizer->p_module =
128 module_Need( p_sys->p_packetizer, "packetizer", NULL, 0 );
130 if( p_sys->p_packetizer->p_module == NULL)
132 vlc_object_destroy( p_sys->p_packetizer );
133 msg_Err( p_demux, "cannot find mp4v packetizer" );
141 /*****************************************************************************
142 * Close: frees unused data
143 *****************************************************************************/
144 static void Close( vlc_object_t * p_this )
146 demux_t *p_demux = (demux_t*)p_this;
147 demux_sys_t *p_sys = p_demux->p_sys;
149 module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
150 vlc_object_destroy( p_sys->p_packetizer );
155 /*****************************************************************************
156 * Demux: reads and demuxes data packets
157 *****************************************************************************
158 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
159 *****************************************************************************/
160 static int Demux( demux_t *p_demux)
162 demux_sys_t *p_sys = p_demux->p_sys;
163 block_t *p_block_in, *p_block_out;
165 if( ( p_block_in = stream_Block( p_demux->s, H264_PACKET_SIZE ) ) == NULL )
170 /* m4v demuxer doesn't set pts/dts at all */
171 p_block_in->i_dts = 1;
172 p_block_in->i_pts = 1;
174 while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
178 block_t *p_next = p_block_out->p_next;
180 p_block_out->p_next = NULL;
182 if( p_sys->p_es == NULL )
184 p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
185 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
188 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
189 p_block_out->i_dts = p_sys->i_dts;
190 p_block_out->i_pts = p_sys->i_dts;
192 es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
194 p_block_out = p_next;
196 p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
202 /*****************************************************************************
204 *****************************************************************************/
205 static int Control( demux_t *p_demux, int i_query, va_list args )
207 /* demux_sys_t *p_sys = p_demux->p_sys; */
208 /* FIXME calculate the bitrate */
209 if( i_query == DEMUX_SET_TIME )
212 return demux2_vaControlHelper( p_demux->s,
214 0, 1, i_query, args );