1 /*****************************************************************************
2 * pes.c: PES packetizer used by the MPEG multiplexers
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: pes.c,v 1.9 2003/08/02 01:33:53 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>
47 #define PES_PAYLOAD_SIZE_MAX 65500
49 static inline int PESHeader( uint8_t *p_hdr, mtime_t i_pts, mtime_t i_dts,
50 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 */
82 /* For PES_PRIVATE_STREAM_1 there is an extra header after the
84 if( i_stream_id == PES_PRIVATE_STREAM_1 )
87 if( ( i_private_id&0xf8 ) == 0x80 )
93 if( i_pts >= 0 && i_dts >= 0 )
95 bits_write( &bits, 16, i_es_size + i_extra+ 13 );
100 bits_write( &bits, 16, i_es_size + i_extra + 8 );
105 bits_write( &bits, 16, i_es_size + i_extra + 3 );
109 bits_write( &bits, 2, 0x02 ); // mpeg2 id
110 bits_write( &bits, 2, 0x00 ); // pes scrambling control
111 bits_write( &bits, 1, 0x00 ); // pes priority
112 bits_write( &bits, 1, 0x00 ); // data alignement indicator
113 bits_write( &bits, 1, 0x00 ); // copyright
114 bits_write( &bits, 1, 0x00 ); // original or copy
116 bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
117 bits_write( &bits, 1, 0x00 ); // escr flags
118 bits_write( &bits, 1, 0x00 ); // es rate flag
119 bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
120 bits_write( &bits, 1, 0x00 ); // additional copy info flag
121 bits_write( &bits, 1, 0x00 ); // pes crc flag
122 bits_write( &bits, 1, 0x00 ); // pes extention flags
123 if( i_pts_dts == 0x03 )
125 bits_write( &bits, 8, 0x0a ); // header size -> pts and dts
127 else if( i_pts_dts == 0x02 )
129 bits_write( &bits, 8, 0x05 ); // header size -> pts
133 bits_write( &bits, 8, 0x00 ); // header size -> 0
137 if( i_pts_dts & 0x02 )
139 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
140 bits_write( &bits, 3, i_pts >> 30 );
141 bits_write( &bits, 1, 0x01 ); // marker
142 bits_write( &bits, 15, i_pts >> 15 );
143 bits_write( &bits, 1, 0x01 ); // marker
144 bits_write( &bits, 15, i_pts );
145 bits_write( &bits, 1, 0x01 ); // marker
148 if( i_pts_dts & 0x01 )
150 bits_write( &bits, 4, 0x01 ); // '0001'
151 bits_write( &bits, 3, i_dts >> 30 );
152 bits_write( &bits, 1, 0x01 ); // marker
153 bits_write( &bits, 15, i_dts >> 15 );
154 bits_write( &bits, 1, 0x01 ); // marker
155 bits_write( &bits, 15, i_dts );
156 bits_write( &bits, 1, 0x01 ); // marker
163 if( i_pts >= 0 && i_dts >= 0 )
165 bits_write( &bits, 16, i_es_size + 10 /* + stuffing */ );
168 else if( i_pts >= 0 )
170 bits_write( &bits, 16, i_es_size + 5 /* + stuffing */ );
175 bits_write( &bits, 16, i_es_size + 1 /* + stuffing */);
179 /* FIXME: Now should be stuffing */
181 /* No STD_buffer_scale and STD_buffer_size */
184 if( i_pts_dts & 0x02 )
186 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
187 bits_write( &bits, 3, i_pts >> 30 );
188 bits_write( &bits, 1, 0x01 ); // marker
189 bits_write( &bits, 15, i_pts >> 15 );
190 bits_write( &bits, 1, 0x01 ); // marker
191 bits_write( &bits, 15, i_pts );
192 bits_write( &bits, 1, 0x01 ); // marker
195 if( i_pts_dts & 0x01 )
197 bits_write( &bits, 4, 0x01 ); // '0001'
198 bits_write( &bits, 3, i_dts >> 30 );
199 bits_write( &bits, 1, 0x01 ); // marker
200 bits_write( &bits, 15, i_dts >> 15 );
201 bits_write( &bits, 1, 0x01 ); // marker
202 bits_write( &bits, 15, i_dts );
203 bits_write( &bits, 1, 0x01 ); // marker
207 bits_write( &bits, 8, 0x0F );
212 /* now should be stuffing */
213 /* and then pes data */
216 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
218 bits_write( &bits, 8, i_private_id );
219 if( ( i_private_id&0xf0 ) == 0x80 )
221 bits_write( &bits, 24, 0 ); // ac3
225 return( bits.i_data );
229 int E_( EStoPES )( sout_instance_t *p_sout,
230 sout_buffer_t **pp_pes,
235 sout_buffer_t *p_es_sav, *p_pes;
236 mtime_t i_pts, i_dts;
241 int i_private_id = -1;
243 uint8_t header[30]; // PES header + extra < 30 (more like 17)
247 /* HACK for private stream 1 in ps */
248 if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
250 i_private_id = i_stream_id & 0xff;
251 i_stream_id = PES_PRIVATE_STREAM_1;
254 i_pts = p_es->i_pts < 0 ? -1 : p_es->i_pts * 9 / 100; // 90000 units clock
255 i_dts = p_es->i_dts < 0 ? -1 : p_es->i_dts * 9 / 100; // 90000 units clock
257 i_size = p_es->i_size;
258 p_data = p_es->p_buffer;
260 *pp_pes = p_pes = NULL;
265 i_pes_payload = __MIN( i_size, PES_PAYLOAD_SIZE_MAX );
266 i_pes_header = PESHeader( header, i_pts, i_dts, i_pes_payload,
267 i_stream_id, i_private_id, b_mpeg2 );
268 i_dts = -1; // only first PES has a dts/pts
273 if( sout_BufferReallocFromPreHeader( p_sout, p_es, i_pes_header ) )
276 "cannot realloc preheader (should never happen)" );
279 /* reuse p_es for first frame */
280 *pp_pes = p_pes = p_es;
281 /* don't touch i_dts, i_pts, i_length as are already set :) */
286 p_pes->p_next = sout_BufferNew( p_sout,
287 i_pes_header + i_pes_payload );
288 p_pes = p_pes->p_next;
293 if( i_pes_payload > 0 )
295 p_sout->p_vlc->pf_memcpy( p_pes->p_buffer + i_pes_header,
296 p_data, i_pes_payload );
301 memcpy( p_pes->p_buffer, header, i_pes_header );
303 i_size -= i_pes_payload;
304 p_data += i_pes_payload;
305 p_pes->i_size = i_pes_header + i_pes_payload;
307 } while( i_size > 0 );
310 if( p_es_sav->i_size + 10*1024 < p_es_sav->i_buffer_size )
312 sout_BufferRealloc( p_sout, p_es_sav, p_es_sav->i_size );