1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: pes.c,v 1.4 2003/01/17 15:26:24 fenrir Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Eric Petit <titer@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 #include <sys/types.h>
36 #include <vlc/input.h>
41 #elif defined( _MSC_VER ) && defined( _WIN32 ) && !defined( UNDER_CE )
49 #define PES_PAYLOAD_SIZE_MAX 65500
51 static inline int PESHeader( uint8_t *p_hdr, mtime_t i_pts, mtime_t i_dts, int i_es_size, int i_stream_id, int i_private_id )
55 bits_initwrite( &bits, 30, p_hdr );
58 bits_write( &bits, 24, 0x01 );
59 bits_write( &bits, 8, i_stream_id );
62 case PES_PROGRAM_STREAM_MAP:
64 case PES_PRIVATE_STREAM_2:
67 case PES_PROGRAM_STREAM_DIRECTORY:
68 case PES_DSMCC_STREAM:
69 case PES_ITU_T_H222_1_TYPE_E_STREAM:
70 /* add pes data size */
71 bits_write( &bits, 16, i_es_size );
73 return( bits.i_data );
76 /* arg, a little more difficult */
77 // if( b_mpeg2 ) // FIXME unsupported
82 /* *** for PES_PRIVATE_STREAM_1 there is an extra header after the pes hdr *** */
83 if( i_stream_id == PES_PRIVATE_STREAM_1 )
86 if( ( i_private_id&0xf0 ) == 0x80 )
94 bits_write( &bits, 16, i_es_size + i_extra+ 13 );
99 bits_write( &bits, 16, i_es_size + i_extra + 8 );
103 bits_write( &bits, 2, 0x02 ); // mpeg2 id
104 bits_write( &bits, 2, 0x00 ); // pes scrambling control
105 bits_write( &bits, 1, 0x00 ); // pes priority
106 bits_write( &bits, 1, 0x00 ); // data alignement indicator
107 bits_write( &bits, 1, 0x00 ); // copyright
108 bits_write( &bits, 1, 0x00 ); // original or copy
110 bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
111 bits_write( &bits, 1, 0x00 ); // escr flags
112 bits_write( &bits, 1, 0x00 ); // es rate flag
113 bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
114 bits_write( &bits, 1, 0x00 ); // additional copy info flag
115 bits_write( &bits, 1, 0x00 ); // pes crc flag
116 bits_write( &bits, 1, 0x00 ); // pes extention flags
117 if( i_pts_dts & 0x01 )
119 bits_write( &bits, 8, 0x0a ); // header size -> pts and dts
123 bits_write( &bits, 8, 0x05 ); // header size -> pts
127 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
128 bits_write( &bits, 3, i_pts >> 30 );
129 bits_write( &bits, 1, 0x01 ); // marker
130 bits_write( &bits, 15, i_pts >> 15 );
131 bits_write( &bits, 1, 0x01 ); // marker
132 bits_write( &bits, 15, i_pts );
133 bits_write( &bits, 1, 0x01 ); // marker
136 if( i_pts_dts & 0x01 )
138 bits_write( &bits, 4, 0x01 ); // '0001'
139 bits_write( &bits, 3, i_dts >> 30 );
140 bits_write( &bits, 1, 0x01 ); // marker
141 bits_write( &bits, 15, i_dts >> 15 );
142 bits_write( &bits, 1, 0x01 ); // marker
143 bits_write( &bits, 15, i_dts );
144 bits_write( &bits, 1, 0x01 ); // marker
147 /* now should be stuffing */
148 /* and then pes data */
151 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
153 bits_write( &bits, 8, i_private_id );
154 if( ( i_private_id&0xf0 ) == 0x80 )
156 bits_write( &bits, 24, 0 ); // ac3
160 return( bits.i_data );
164 int E_( EStoPES )( sout_instance_t *p_sout,
165 sout_buffer_t **pp_pes,
170 sout_buffer_t *p_es_sav, *p_pes;
171 mtime_t i_pts, i_dts;
176 int i_private_id = -1;
178 uint8_t header[30]; // PES header + extra < 30 (more like 17)
182 /* HACK for private stream 1 in ps */
183 if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
185 i_private_id = i_stream_id & 0xff;
186 i_stream_id = PES_PRIVATE_STREAM_1;
189 i_pts = p_es->i_pts * 9 / 100; // 90000 units clock
190 i_dts = p_es->i_dts * 9 / 100; // 90000 units clock
192 i_size = p_es->i_size;
193 p_data = p_es->p_buffer;
195 *pp_pes = p_pes = NULL;
200 i_pes_payload = __MIN( i_size, PES_PAYLOAD_SIZE_MAX );
201 i_pes_header = PESHeader( header, i_pts, i_dts, i_pes_payload, i_stream_id, i_private_id );
202 i_dts = -1; // only first PES has a dts
206 if( sout_BufferReallocFromPreHeader( p_sout, p_es, i_pes_header ) )
208 msg_Err( p_sout, "cannot realloc prehader (should never happen)" );
211 /* reuse p_es for first frame */
212 *pp_pes = p_pes = p_es;
213 /* don't touch i_dts, i_pts, i_length as are already set :) */
218 p_pes->p_next = sout_BufferNew( p_sout, i_pes_header + i_pes_payload );
219 p_pes = p_pes->p_next;
224 if( i_pes_payload > 0 )
226 p_sout->p_vlc->pf_memcpy( p_pes->p_buffer + i_pes_header, p_data, i_pes_payload );
231 memcpy( p_pes->p_buffer, header, i_pes_header );
233 i_size -= i_pes_payload;
234 p_data += i_pes_payload;
235 p_pes->i_size = i_pes_header + i_pes_payload;
237 } while( i_size > 0 );
240 if( p_es_sav->i_size + 10*1024 < p_es_sav->i_buffer_size )
242 sout_BufferRealloc( p_sout, p_es_sav, p_es_sav->i_size );