1 /*****************************************************************************
2 * pes.c: PES packetizer used by the MPEG multiplexers
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: pes.c,v 1.14 2003/12/10 23:16:04 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,
50 int i_es_size, int i_stream_id, int i_private_id,
56 /* For PES_PRIVATE_STREAM_1 there is an extra header after the
58 /* i_private_id != -1 because TS use 0xbd without private_id */
59 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
62 if( ( i_private_id & 0xf0 ) == 0x80 )
69 bits_initwrite( &bits, 30, p_hdr );
72 bits_write( &bits, 24, 0x01 );
73 bits_write( &bits, 8, i_stream_id );
76 case PES_PROGRAM_STREAM_MAP:
78 case PES_PRIVATE_STREAM_2:
81 case PES_PROGRAM_STREAM_DIRECTORY:
82 case PES_DSMCC_STREAM:
83 case PES_ITU_T_H222_1_TYPE_E_STREAM:
84 /* add pes data size */
85 bits_write( &bits, 16, i_es_size );
87 return( bits.i_data );
90 /* arg, a little more difficult */
95 if( i_pts > 0 && i_dts > 0 )
97 bits_write( &bits, 16, i_es_size + i_extra+ 13 );
102 bits_write( &bits, 16, i_es_size + i_extra + 8 );
107 bits_write( &bits, 16, i_es_size + i_extra + 3 );
111 bits_write( &bits, 2, 0x02 ); // mpeg2 id
112 bits_write( &bits, 2, 0x00 ); // pes scrambling control
113 bits_write( &bits, 1, 0x00 ); // pes priority
114 bits_write( &bits, 1, 0x00 ); // data alignement indicator
115 bits_write( &bits, 1, 0x00 ); // copyright
116 bits_write( &bits, 1, 0x00 ); // original or copy
118 bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
119 bits_write( &bits, 1, 0x00 ); // escr flags
120 bits_write( &bits, 1, 0x00 ); // es rate flag
121 bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
122 bits_write( &bits, 1, 0x00 ); // additional copy info flag
123 bits_write( &bits, 1, 0x00 ); // pes crc flag
124 bits_write( &bits, 1, 0x00 ); // pes extention flags
125 if( i_pts_dts == 0x03 )
127 bits_write( &bits, 8, 0x0a ); // header size -> pts and dts
129 else if( i_pts_dts == 0x02 )
131 bits_write( &bits, 8, 0x05 ); // header size -> pts
135 bits_write( &bits, 8, 0x00 ); // header size -> 0
139 if( i_pts_dts & 0x02 )
141 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
142 bits_write( &bits, 3, i_pts >> 30 );
143 bits_write( &bits, 1, 0x01 ); // marker
144 bits_write( &bits, 15, i_pts >> 15 );
145 bits_write( &bits, 1, 0x01 ); // marker
146 bits_write( &bits, 15, i_pts );
147 bits_write( &bits, 1, 0x01 ); // marker
150 if( i_pts_dts & 0x01 )
152 bits_write( &bits, 4, 0x01 ); // '0001'
153 bits_write( &bits, 3, i_dts >> 30 );
154 bits_write( &bits, 1, 0x01 ); // marker
155 bits_write( &bits, 15, i_dts >> 15 );
156 bits_write( &bits, 1, 0x01 ); // marker
157 bits_write( &bits, 15, i_dts );
158 bits_write( &bits, 1, 0x01 ); // marker
165 if( i_pts > 0 && i_dts > 0 )
167 bits_write( &bits, 16, i_es_size + i_extra + 10 /* + stuffing */ );
172 bits_write( &bits, 16, i_es_size + i_extra + 5 /* + stuffing */ );
177 bits_write( &bits, 16, i_es_size + i_extra + 1 /* + stuffing */);
181 /* FIXME: Now should be stuffing */
183 /* No STD_buffer_scale and STD_buffer_size */
186 if( i_pts_dts & 0x02 )
188 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
189 bits_write( &bits, 3, i_pts >> 30 );
190 bits_write( &bits, 1, 0x01 ); // marker
191 bits_write( &bits, 15, i_pts >> 15 );
192 bits_write( &bits, 1, 0x01 ); // marker
193 bits_write( &bits, 15, i_pts );
194 bits_write( &bits, 1, 0x01 ); // marker
197 if( i_pts_dts & 0x01 )
199 bits_write( &bits, 4, 0x01 ); // '0001'
200 bits_write( &bits, 3, i_dts >> 30 );
201 bits_write( &bits, 1, 0x01 ); // marker
202 bits_write( &bits, 15, i_dts >> 15 );
203 bits_write( &bits, 1, 0x01 ); // marker
204 bits_write( &bits, 15, i_dts );
205 bits_write( &bits, 1, 0x01 ); // marker
209 bits_write( &bits, 8, 0x0F );
214 /* now should be stuffing */
215 /* and then pes data */
218 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
220 bits_write( &bits, 8, i_private_id );
221 if( ( i_private_id&0xf0 ) == 0x80 )
223 bits_write( &bits, 24, 0 ); // ac3
227 return( bits.i_data );
231 int E_( EStoPES )( sout_instance_t *p_sout,
232 sout_buffer_t **pp_pes,
237 sout_buffer_t *p_es_sav, *p_pes;
238 mtime_t i_pts, i_dts, i_length;
243 int i_private_id = -1;
245 uint8_t header[30]; // PES header + extra < 30 (more like 17)
251 /* HACK for private stream 1 in ps */
252 if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
254 i_private_id = i_stream_id & 0xff;
255 i_stream_id = PES_PRIVATE_STREAM_1;
258 i_pts = p_es->i_pts <= 0 ? 0 : p_es->i_pts * 9 / 100; // 90000 units clock
259 i_dts = p_es->i_dts <= 0 ? 0 : p_es->i_dts * 9 / 100; // 90000 units clock
261 i_size = p_es->i_size;
262 p_data = p_es->p_buffer;
264 *pp_pes = p_pes = NULL;
269 i_pes_payload = __MIN( i_size, PES_PAYLOAD_SIZE_MAX );
270 i_pes_header = PESHeader( header, i_pts, i_dts, i_pes_payload,
271 i_stream_id, i_private_id, b_mpeg2 );
272 i_dts = 0; // only first PES has a dts/pts
277 if( sout_BufferReallocFromPreHeader( p_sout, p_es, i_pes_header ) )
280 "cannot realloc preheader (should never happen)" );
283 /* reuse p_es for first frame */
284 *pp_pes = p_pes = p_es;
285 /* don't touch i_dts, i_pts, i_length as are already set :) */
290 p_pes->p_next = sout_BufferNew( p_sout,
291 i_pes_header + i_pes_payload );
292 p_pes = p_pes->p_next;
297 if( i_pes_payload > 0 )
299 p_sout->p_vlc->pf_memcpy( p_pes->p_buffer + i_pes_header,
300 p_data, i_pes_payload );
306 memcpy( p_pes->p_buffer, header, i_pes_header );
308 i_size -= i_pes_payload;
309 p_data += i_pes_payload;
310 p_pes->i_size = i_pes_header + i_pes_payload;
312 } while( i_size > 0 );
315 if( p_es_sav->i_size + 10*1024 < p_es_sav->i_buffer_size )
317 sout_BufferRealloc( p_sout, p_es_sav, p_es_sav->i_size );
320 /* Now redate all pes */
321 i_dts = (*pp_pes)->i_dts;
322 i_length = (*pp_pes)->i_length / i_pes_count;
323 for( p_pes = *pp_pes; p_pes != NULL; p_pes = p_pes->p_next )
325 p_pes->i_dts = i_dts;
326 p_pes->i_length = i_length;