1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: pes.c,v 1.6 2003/06/09 07:16:41 gbazin 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>
47 #define PES_PAYLOAD_SIZE_MAX 65500
49 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 )
53 bits_initwrite( &bits, 30, p_hdr );
56 bits_write( &bits, 24, 0x01 );
57 bits_write( &bits, 8, i_stream_id );
60 case PES_PROGRAM_STREAM_MAP:
62 case PES_PRIVATE_STREAM_2:
65 case PES_PROGRAM_STREAM_DIRECTORY:
66 case PES_DSMCC_STREAM:
67 case PES_ITU_T_H222_1_TYPE_E_STREAM:
68 /* add pes data size */
69 bits_write( &bits, 16, i_es_size );
71 return( bits.i_data );
74 /* arg, a little more difficult */
75 // if( b_mpeg2 ) // FIXME unsupported
80 /* For PES_PRIVATE_STREAM_1 there is an extra header after the
82 if( i_stream_id == PES_PRIVATE_STREAM_1 )
85 if( ( i_private_id&0xf0 ) == 0x80 )
91 if( i_pts >= 0 && i_dts >= 0 )
93 bits_write( &bits, 16, i_es_size + i_extra+ 13 );
98 bits_write( &bits, 16, i_es_size + i_extra + 8 );
103 bits_write( &bits, 16, i_es_size + i_extra + 3 );
107 bits_write( &bits, 2, 0x02 ); // mpeg2 id
108 bits_write( &bits, 2, 0x00 ); // pes scrambling control
109 bits_write( &bits, 1, 0x00 ); // pes priority
110 bits_write( &bits, 1, 0x00 ); // data alignement indicator
111 bits_write( &bits, 1, 0x00 ); // copyright
112 bits_write( &bits, 1, 0x00 ); // original or copy
114 bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
115 bits_write( &bits, 1, 0x00 ); // escr flags
116 bits_write( &bits, 1, 0x00 ); // es rate flag
117 bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
118 bits_write( &bits, 1, 0x00 ); // additional copy info flag
119 bits_write( &bits, 1, 0x00 ); // pes crc flag
120 bits_write( &bits, 1, 0x00 ); // pes extention flags
121 if( i_pts_dts == 0x03 )
123 bits_write( &bits, 8, 0x0a ); // header size -> pts and dts
125 else if( i_pts_dts == 0x02 )
127 bits_write( &bits, 8, 0x05 ); // header size -> pts
131 bits_write( &bits, 8, 0x00 ); // header size -> 0
135 if( i_pts_dts & 0x02 )
137 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
138 bits_write( &bits, 3, i_pts >> 30 );
139 bits_write( &bits, 1, 0x01 ); // marker
140 bits_write( &bits, 15, i_pts >> 15 );
141 bits_write( &bits, 1, 0x01 ); // marker
142 bits_write( &bits, 15, i_pts );
143 bits_write( &bits, 1, 0x01 ); // marker
146 if( i_pts_dts & 0x01 )
148 bits_write( &bits, 4, 0x01 ); // '0001'
149 bits_write( &bits, 3, i_dts >> 30 );
150 bits_write( &bits, 1, 0x01 ); // marker
151 bits_write( &bits, 15, i_dts >> 15 );
152 bits_write( &bits, 1, 0x01 ); // marker
153 bits_write( &bits, 15, i_dts );
154 bits_write( &bits, 1, 0x01 ); // marker
157 /* now should be stuffing */
158 /* and then pes data */
161 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
163 bits_write( &bits, 8, i_private_id );
164 if( ( i_private_id&0xf0 ) == 0x80 )
166 bits_write( &bits, 24, 0 ); // ac3
170 return( bits.i_data );
174 int E_( EStoPES )( sout_instance_t *p_sout,
175 sout_buffer_t **pp_pes,
180 sout_buffer_t *p_es_sav, *p_pes;
181 mtime_t i_pts, i_dts;
186 int i_private_id = -1;
188 uint8_t header[30]; // PES header + extra < 30 (more like 17)
192 /* HACK for private stream 1 in ps */
193 if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
195 i_private_id = i_stream_id & 0xff;
196 i_stream_id = PES_PRIVATE_STREAM_1;
199 i_pts = p_es->i_pts * 9 / 100; // 90000 units clock
200 i_dts = p_es->i_dts * 9 / 100; // 90000 units clock
202 i_size = p_es->i_size;
203 p_data = p_es->p_buffer;
205 *pp_pes = p_pes = NULL;
210 i_pes_payload = __MIN( i_size, PES_PAYLOAD_SIZE_MAX );
211 i_pes_header = PESHeader( header, i_pts, i_dts, i_pes_payload, i_stream_id, i_private_id );
212 i_dts = -1; // only first PES has a dts
216 if( sout_BufferReallocFromPreHeader( p_sout, p_es, i_pes_header ) )
218 msg_Err( p_sout, "cannot realloc prehader (should never happen)" );
221 /* reuse p_es for first frame */
222 *pp_pes = p_pes = p_es;
223 /* don't touch i_dts, i_pts, i_length as are already set :) */
228 p_pes->p_next = sout_BufferNew( p_sout, i_pes_header + i_pes_payload );
229 p_pes = p_pes->p_next;
234 if( i_pes_payload > 0 )
236 p_sout->p_vlc->pf_memcpy( p_pes->p_buffer + i_pes_header, p_data, i_pes_payload );
241 memcpy( p_pes->p_buffer, header, i_pes_header );
243 i_size -= i_pes_payload;
244 p_data += i_pes_payload;
245 p_pes->i_size = i_pes_header + i_pes_payload;
247 } while( i_size > 0 );
250 if( p_es_sav->i_size + 10*1024 < p_es_sav->i_buffer_size )
252 sout_BufferRealloc( p_sout, p_es_sav, p_es_sav->i_size );