1 /*****************************************************************************
2 * pes.c: PES packetizer used by the MPEG multiplexers
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
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, es_format_t *p_fmt,
51 int i_stream_id, int i_private_id,
52 vlc_bool_t b_mpeg2, vlc_bool_t b_data_alignment,
58 /* For PES_PRIVATE_STREAM_1 there is an extra header after the
60 /* i_private_id != -1 because TS use 0xbd without private_id */
61 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
64 if( ( i_private_id & 0xf0 ) == 0x80 )
71 bits_initwrite( &bits, 50, p_hdr );
74 bits_write( &bits, 24, 0x01 );
75 bits_write( &bits, 8, i_stream_id );
78 case PES_PROGRAM_STREAM_MAP:
80 case PES_PRIVATE_STREAM_2:
83 case PES_PROGRAM_STREAM_DIRECTORY:
84 case PES_DSMCC_STREAM:
85 case PES_ITU_T_H222_1_TYPE_E_STREAM:
86 /* add pes data size */
87 bits_write( &bits, 16, i_es_size );
89 return( bits.i_data );
92 /* arg, a little more difficult */
97 if( i_pts > 0 && i_dts > 0 &&
98 ( i_pts != i_dts || ( p_fmt->i_cat == VIDEO_ES &&
99 p_fmt->i_codec != VLC_FOURCC('m','p','g','v') ) ) )
102 if ( !i_header_size ) i_header_size = 0xa;
107 if ( !i_header_size ) i_header_size = 0x5;
112 if ( !i_header_size ) i_header_size = 0x0;
115 bits_write( &bits, 16, i_es_size + i_extra + 3
116 + i_header_size ); // size
117 bits_write( &bits, 2, 0x02 ); // mpeg2 id
118 bits_write( &bits, 2, 0x00 ); // pes scrambling control
119 bits_write( &bits, 1, 0x00 ); // pes priority
120 bits_write( &bits, 1, b_data_alignment ); // data alignement indicator
121 bits_write( &bits, 1, 0x00 ); // copyright
122 bits_write( &bits, 1, 0x00 ); // original or copy
124 bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
125 bits_write( &bits, 1, 0x00 ); // escr flags
126 bits_write( &bits, 1, 0x00 ); // es rate flag
127 bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
128 bits_write( &bits, 1, 0x00 ); // additional copy info flag
129 bits_write( &bits, 1, 0x00 ); // pes crc flag
130 bits_write( &bits, 1, 0x00 ); // pes extention flags
131 bits_write( &bits, 8, i_header_size ); // header size -> pts and dts
134 if( i_pts_dts & 0x02 )
136 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
137 bits_write( &bits, 3, i_pts >> 30 );
138 bits_write( &bits, 1, 0x01 ); // marker
139 bits_write( &bits, 15, i_pts >> 15 );
140 bits_write( &bits, 1, 0x01 ); // marker
141 bits_write( &bits, 15, i_pts );
142 bits_write( &bits, 1, 0x01 ); // marker
143 i_header_size -= 0x5;
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
155 i_header_size -= 0x5;
157 while ( i_header_size )
159 bits_write( &bits, 8, 0xff );
167 if( i_pts > 0 && i_dts > 0 &&
168 ( i_pts != i_dts || p_fmt->i_cat == VIDEO_ES ) )
170 bits_write( &bits, 16, i_es_size + i_extra + 10 /* + stuffing */ );
175 bits_write( &bits, 16, i_es_size + i_extra + 5 /* + stuffing */ );
180 bits_write( &bits, 16, i_es_size + i_extra + 1 /* + stuffing */);
184 /* FIXME: Now should be stuffing */
186 /* No STD_buffer_scale and STD_buffer_size */
189 if( i_pts_dts & 0x02 )
191 bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
192 bits_write( &bits, 3, i_pts >> 30 );
193 bits_write( &bits, 1, 0x01 ); // marker
194 bits_write( &bits, 15, i_pts >> 15 );
195 bits_write( &bits, 1, 0x01 ); // marker
196 bits_write( &bits, 15, i_pts );
197 bits_write( &bits, 1, 0x01 ); // marker
200 if( i_pts_dts & 0x01 )
202 bits_write( &bits, 4, 0x01 ); // '0001'
203 bits_write( &bits, 3, i_dts >> 30 );
204 bits_write( &bits, 1, 0x01 ); // marker
205 bits_write( &bits, 15, i_dts >> 15 );
206 bits_write( &bits, 1, 0x01 ); // marker
207 bits_write( &bits, 15, i_dts );
208 bits_write( &bits, 1, 0x01 ); // marker
212 bits_write( &bits, 8, 0x0F );
217 /* now should be stuffing */
218 /* and then pes data */
221 if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
223 bits_write( &bits, 8, i_private_id );
224 if( ( i_private_id&0xf0 ) == 0x80 )
226 bits_write( &bits, 24, 0 ); // ac3
230 return( bits.i_data );
234 int E_( EStoPES )( sout_instance_t *p_sout, block_t **pp_pes, block_t *p_es,
235 es_format_t *p_fmt, int i_stream_id,
236 int b_mpeg2, int b_data_alignment, int i_header_size )
239 mtime_t i_pts, i_dts, i_length;
244 int i_private_id = -1;
246 uint8_t header[50]; // PES header + extra < 50 (more like 17)
252 /* HACK for private stream 1 in ps */
253 if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
255 i_private_id = i_stream_id & 0xff;
256 i_stream_id = PES_PRIVATE_STREAM_1;
259 i_pts = p_es->i_pts <= 0 ? 0 : p_es->i_pts * 9 / 100; // 90000 units clock
260 i_dts = p_es->i_dts <= 0 ? 0 : p_es->i_dts * 9 / 100; // 90000 units clock
262 i_size = p_es->i_buffer;
263 p_data = p_es->p_buffer;
265 *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 p_fmt, i_stream_id, i_private_id, b_mpeg2,
272 b_data_alignment, i_header_size );
273 i_dts = 0; // only first PES has a dts/pts
278 p_es = block_Realloc( p_es, i_pes_header, p_es->i_buffer );
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 = block_New( p_sout, i_pes_header + i_pes_payload );
287 p_pes = p_pes->p_next;
292 if( i_pes_payload > 0 )
294 p_sout->p_vlc->pf_memcpy( p_pes->p_buffer + i_pes_header,
295 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_buffer = i_pes_header + i_pes_payload;
307 } while( i_size > 0 );
309 /* Now redate all pes */
310 i_dts = (*pp_pes)->i_dts;
311 i_length = (*pp_pes)->i_length / i_pes_count;
312 for( p_pes = *pp_pes; p_pes != NULL; p_pes = p_pes->p_next )
314 p_pes->i_dts = i_dts;
315 p_pes->i_length = i_length;