/*****************************************************************************
- * pes.c
+ * pes.c: PES packetizer used by the MPEG multiplexers
*****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: pes.c,v 1.1 2002/12/14 21:32:41 fenrir Exp $
+ * Copyright (C) 2001, 2002 the VideoLAN team
+ * $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-
-#include <vlc/vlc.h>
-#include <vlc/input.h>
-#include <vlc/sout.h>
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#elif defined( _MSC_VER ) && defined( _WIN32 ) && !defined( UNDER_CE )
-# include <io.h>
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
#endif
-#include "codecs.h"
+#include <vlc_common.h>
+#include <vlc_sout.h>
+#include <vlc_block.h>
+#include <assert.h>
+
+#include <vlc_codecs.h>
#include "pes.h"
#include "bits.h"
-int EStoPES( sout_instance_t *p_sout,
- sout_buffer_t **pp_pes,
- sout_buffer_t *p_es,
- int i_stream_id,
- int b_mpeg2 )
+/** PESHeader, write a pes header
+ * \param i_es_size length of payload data. (Must be < PES_PAYLOAD_SIZE_MAX
+ * unless the conditions for unbounded PES packets are met)
+ * \param i_stream_id stream id as follows:
+ * - 0x00 - 0xff : normal stream_id as per Table 2-18
+ * - 0xfd00 - 0xfd7f : stream_id_extension = low 7 bits
+ * (stream_id = PES_EXTENDED_STREAM_ID)
+ * - 0xbd00 - 0xbdff : private_id = low 8 bits
+ * (stream_id = PES_PRIVATE_STREAM)
+ * \param i_header_size length of padding data to insert into PES packet
+ * header in bytes.
+ */
+static inline int PESHeader( uint8_t *p_hdr, mtime_t i_pts, mtime_t i_dts,
+ int i_es_size, es_format_t *p_fmt,
+ int i_stream_id, bool b_mpeg2,
+ bool b_data_alignment, int i_header_size )
{
- sout_buffer_t *p_pes;
bits_buffer_t bits;
- mtime_t i_pts, i_dts;
- uint8_t *p_data;
- int i_size;
-
- i_pts = p_es->i_pts * 9 / 100; // 90000 units clock
- i_dts = p_es->i_dts * 9 / 100; // 90000 units clock
-
- i_size = p_es->i_size;
- p_data = p_es->p_buffer;
-
- *pp_pes = p_pes = NULL;
+ int i_extra = 0;
+ int i_private_id = -1;
+ int i_stream_id_extension = 0;
- do
+ /* HACK for private stream 1 in ps */
+ if( ( i_stream_id >> 8 ) == PES_PRIVATE_STREAM_1 )
{
- int i_copy;
-
- i_copy = __MIN( i_size, 65500 );
-
- if( *pp_pes == NULL )
- {
- *pp_pes = p_pes = sout_BufferNew( p_sout, 100 + i_copy);
- p_pes->i_dts = p_es->i_dts;
- p_pes->i_pts = p_es->i_pts;
- p_pes->i_length = p_es->i_length;
- }
- else
- {
- p_pes->p_next = sout_BufferNew( p_sout, 100 + i_copy );
- p_pes = p_pes->p_next;
-
- p_pes->i_dts = 0;
- p_pes->i_pts = 0;
- p_pes->i_length = 0;
- }
-
- p_pes->i_size = 0;
-
+ i_private_id = i_stream_id & 0xff;
+ i_stream_id = PES_PRIVATE_STREAM_1;
+ /* For PES_PRIVATE_STREAM_1 there is an extra header after the
+ pes header */
+ /* i_private_id != -1 because TS use 0xbd without private_id */
+ i_extra = 1;
+ if( ( i_private_id & 0xf0 ) == 0x80 )
+ i_extra += 3;
+ }
+ else if( ( i_stream_id >> 8 ) == PES_EXTENDED_STREAM_ID )
+ {
+ /* Enable support for extended_stream_id as defined in
+ * ISO/IEC 13818-1:2000/Amd.2:2003 */
+ /* NB, i_extended_stream_id is limited to 7 bits */
+ i_stream_id_extension = i_stream_id & 0x7f;
+ i_stream_id = PES_EXTENDED_STREAM_ID;
+ }
+
+ bits_initwrite( &bits, 50, p_hdr );
+
+ /* add start code */
+ bits_write( &bits, 24, 0x01 );
+ bits_write( &bits, 8, i_stream_id );
+ switch( i_stream_id )
+ {
+ case PES_PROGRAM_STREAM_MAP:
+ case PES_PADDING:
+ case PES_PRIVATE_STREAM_2:
+ case PES_ECM:
+ case PES_EMM:
+ case PES_PROGRAM_STREAM_DIRECTORY:
+ case PES_DSMCC_STREAM:
+ case PES_ITU_T_H222_1_TYPE_E_STREAM:
+ /* add pes data size */
+ bits_write( &bits, 16, i_es_size );
+ bits_align( &bits );
+ return( bits.i_data );
+
+ default:
+ /* arg, a little more difficult */
+ if( b_mpeg2 )
+ {
+ int i_pts_dts;
+ bool b_pes_extension_flag = false;
+
+ if( i_pts > 0 && i_dts > 0 &&
+ ( i_pts != i_dts || ( p_fmt->i_cat == VIDEO_ES &&
+ p_fmt->i_codec != VLC_CODEC_MPGV ) ) )
+ {
+ i_pts_dts = 0x03;
+ if ( !i_header_size ) i_header_size = 0xa;
+ }
+ else if( i_pts > 0 )
+ {
+ i_pts_dts = 0x02;
+ if ( !i_header_size ) i_header_size = 0x5;
+ }
+ else
+ {
+ i_pts_dts = 0x00;
+ if ( !i_header_size ) i_header_size = 0x0;
+ }
- bits_initwrite( &bits, 100, p_pes->p_buffer );
+ if( i_stream_id == PES_EXTENDED_STREAM_ID )
+ {
+ b_pes_extension_flag = true;
+ i_header_size += 1 + 1;
+ }
- /* first 4 bytes common pes header */
- /* add start code for pes 0x000001 */
- bits_write( &bits, 24, 0x01 );
- /* add stream id */
- bits_write( &bits, 8, i_stream_id );
+ if( b_pes_extension_flag )
+ {
+ i_header_size += 1;
+ }
- switch( i_stream_id )
- {
- case PES_PROGRAM_STREAM_MAP:
- case PES_PADDING:
- case PES_PRIVATE_STREAM_2:
- case PES_ECM:
- case PES_EMM:
- case PES_PROGRAM_STREAM_DIRECTORY:
- case PES_DSMCC_STREAM:
- case PES_ITU_T_H222_1_TYPE_E_STREAM:
- /* add pes data size */
- bits_write( &bits, 16, i_copy );
- bits_align( &bits );
- break;
-
- default:
- /* arg, a little more difficult */
- if( b_mpeg2 )
- {
- int i_pts_dts;
-
- if( i_dts > 0 )
- {
- bits_write( &bits, 16, i_copy + 13 );
- i_pts_dts = 0x03;
- }
- else
+ /* Unbounded streams are only allowed in TS (not PS) and only
+ * for some ES, eg. MPEG* Video ES or Dirac ES. */
+ if( i_es_size > PES_PAYLOAD_SIZE_MAX )
+ bits_write( &bits, 16, 0 ); // size unbounded
+ else
+ bits_write( &bits, 16, i_es_size + i_extra + 3
+ + i_header_size ); // size
+ bits_write( &bits, 2, 0x02 ); // mpeg2 id
+ bits_write( &bits, 2, 0x00 ); // pes scrambling control
+ bits_write( &bits, 1, 0x00 ); // pes priority
+ bits_write( &bits, 1, b_data_alignment ); // data alignement indicator
+ bits_write( &bits, 1, 0x00 ); // copyright
+ bits_write( &bits, 1, 0x00 ); // original or copy
+
+ bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
+ bits_write( &bits, 1, 0x00 ); // escr flags
+ bits_write( &bits, 1, 0x00 ); // es rate flag
+ bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
+ bits_write( &bits, 1, 0x00 ); // additional copy info flag
+ bits_write( &bits, 1, 0x00 ); // pes crc flag
+ bits_write( &bits, 1, b_pes_extension_flag );
+ bits_write( &bits, 8, i_header_size );
+
+ /* write pts */
+ if( i_pts_dts & 0x02 )
+ {
+ bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
+ bits_write( &bits, 3, i_pts >> 30 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_pts >> 15 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_pts );
+ bits_write( &bits, 1, 0x01 ); // marker
+ i_header_size -= 0x5;
+ }
+ /* write i_dts */
+ if( i_pts_dts & 0x01 )
+ {
+ bits_write( &bits, 4, 0x01 ); // '0001'
+ bits_write( &bits, 3, i_dts >> 30 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_dts >> 15 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_dts );
+ bits_write( &bits, 1, 0x01 ); // marker
+ i_header_size -= 0x5;
+ }
+ if( b_pes_extension_flag )
+ {
+ bits_write( &bits, 1, 0x00 ); // PES_private_data_flag
+ bits_write( &bits, 1, 0x00 ); // pack_header_field_flag
+ bits_write( &bits, 1, 0x00 ); // program_packet_sequence_counter_flag
+ bits_write( &bits, 1, 0x00 ); // P-STD_buffer_flag
+ bits_write( &bits, 3, 0x07 ); // reserved
+ bits_write( &bits, 1, 0x01 ); // PES_extension_flag_2
+ /* skipping unsupported parts: */
+ /* PES_private_data */
+ /* pack_header */
+ /* program_packet_sequence_counter */
+ /* P-STD_buffer_flag */
+ if( i_stream_id == PES_EXTENDED_STREAM_ID )
{
- bits_write( &bits, 16, i_copy + 8 );
- i_pts_dts = 0x02;
+ /* PES_extension_2 */
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 7, 0x01 ); // PES_extension_field_length
+ bits_write( &bits, 1, 0x01 ); // stream_id_extension_flag
+ bits_write( &bits, 7, i_stream_id_extension );
+ i_header_size -= 0x2;
}
+ i_header_size -= 0x1;
+ }
+ while ( i_header_size )
+ {
+ bits_write( &bits, 8, 0xff );
+ i_header_size--;
+ }
+ }
+ else /* MPEG1 */
+ {
+ int i_pts_dts;
- bits_write( &bits, 2, 0x02 ); // mpeg2 id
- bits_write( &bits, 2, 0x00 ); // pes scrambling control
- bits_write( &bits, 1, 0x00 ); // pes priority
- bits_write( &bits, 1, 0x00 ); // data alignement indicator
- bits_write( &bits, 1, 0x00 ); // copyright
- bits_write( &bits, 1, 0x00 ); // original or copy
-
- bits_write( &bits, 2, i_pts_dts ); // pts_dts flags
- bits_write( &bits, 1, 0x00 ); // escr flags
- bits_write( &bits, 1, 0x00 ); // es rate flag
- bits_write( &bits, 1, 0x00 ); // dsm trick mode flag
- bits_write( &bits, 1, 0x00 ); // additional copy info flag
- bits_write( &bits, 1, 0x00 ); // pes crc flag
- bits_write( &bits, 1, 0x00 ); // pes extention flags
- if( i_pts_dts & 0x01 )
- {
- bits_write( &bits, 8, 0x0a ); // header size -> pts and dts
- }
- else
- {
- bits_write( &bits, 8, 0x05 ); // header size -> pts
- }
+ if( i_pts > 0 && i_dts > 0 &&
+ ( i_pts != i_dts || p_fmt->i_cat == VIDEO_ES ) )
+ {
+ bits_write( &bits, 16, i_es_size + i_extra + 10 /* + stuffing */ );
+ i_pts_dts = 0x03;
+ }
+ else if( i_pts > 0 )
+ {
+ bits_write( &bits, 16, i_es_size + i_extra + 5 /* + stuffing */ );
+ i_pts_dts = 0x02;
+ }
+ else
+ {
+ bits_write( &bits, 16, i_es_size + i_extra + 1 /* + stuffing */);
+ i_pts_dts = 0x00;
+ }
+
+ /* FIXME: Now should be stuffing */
- /* write pts */
+ /* No STD_buffer_scale and STD_buffer_size */
+
+ /* write pts */
+ if( i_pts_dts & 0x02 )
+ {
bits_write( &bits, 4, i_pts_dts ); // '0010' or '0011'
bits_write( &bits, 3, i_pts >> 30 );
bits_write( &bits, 1, 0x01 ); // marker
bits_write( &bits, 1, 0x01 ); // marker
bits_write( &bits, 15, i_pts );
bits_write( &bits, 1, 0x01 ); // marker
+ }
+ /* write i_dts */
+ if( i_pts_dts & 0x01 )
+ {
+ bits_write( &bits, 4, 0x01 ); // '0001'
+ bits_write( &bits, 3, i_dts >> 30 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_dts >> 15 );
+ bits_write( &bits, 1, 0x01 ); // marker
+ bits_write( &bits, 15, i_dts );
+ bits_write( &bits, 1, 0x01 ); // marker
+ }
+ if( !i_pts_dts )
+ {
+ bits_write( &bits, 8, 0x0F );
+ }
- /* write i_dts */
- if( i_pts_dts & 0x01 )
- {
- bits_write( &bits, 4, 0x01 ); // '0001'
- bits_write( &bits, 3, i_dts >> 30 );
- bits_write( &bits, 1, 0x01 ); // marker
- bits_write( &bits, 15, i_dts >> 15 );
- bits_write( &bits, 1, 0x01 ); // marker
- bits_write( &bits, 15, i_dts );
- bits_write( &bits, 1, 0x01 ); // marker
+ }
- i_dts = 0; // write dts only once
- }
+ /* now should be stuffing */
+ /* and then pes data */
- }
- else
+ bits_align( &bits );
+ if( i_stream_id == PES_PRIVATE_STREAM_1 && i_private_id != -1 )
+ {
+ bits_write( &bits, 8, i_private_id );
+ if( ( i_private_id&0xf0 ) == 0x80 )
{
- msg_Warn( p_sout, "es isn't mpeg2 -->corrupted pes" );
+ bits_write( &bits, 24, 0 ); // ac3
}
- /* now should be stuffing */
- /* and then pes data */
+ }
+ bits_align( &bits );
+ return( bits.i_data );
+ }
+}
- bits_align( &bits );
- break;
- }
+/** EStoPES, encapsulate an elementary stream block into PES packet(s)
+ * each with a maximal payload size of @i_max_pes_size@.
+ *
+ * In some circumstances, unbounded PES packets are allowed:
+ * - Transport streams only (NOT programme streams)
+ * - Only some types of elementary streams (eg MPEG2 video)
+ * It is the responsibility of the caller to enforce these constraints.
+ *
+ * EStoPES will only produce an unbounded PES packet if:
+ * - ES is VIDEO_ES
+ * - i_max_pes_size > PES_PAYLOAD_SIZE_MAX
+ * - length of p_es > PES_PAYLOAD_SIZE_MAX
+ * If the last condition is not met, a single PES packet is produced
+ * which is not unbounded in length.
+ *
+ * \param i_stream_id stream id as follows:
+ * - 0x00 - 0xff : normal stream_id as per Table 2-18
+ * - 0xfd00 - 0xfd7f : stream_id_extension = low 7 bits
+ * (stream_id = PES_EXTENDED_STREAM_ID)
+ * - 0xbd00 - 0xbdff : private_id = low 8 bits
+ * (stream_id = PES_PRIVATE_STREAM)
+ * \param i_header_size length of padding data to insert into PES packet
+ * header in bytes.
+ * \param i_max_pes_size maximum length of each pes packet payload.
+ * if zero, uses default maximum.
+ * To allow unbounded PES packets in transport stream
+ * VIDEO_ES, set to INT_MAX.
+ */
+int EStoPES ( sout_instance_t *p_sout, block_t **pp_pes, block_t *p_es,
+ es_format_t *p_fmt, int i_stream_id,
+ int b_mpeg2, int b_data_alignment, int i_header_size,
+ int i_max_pes_size )
+{
+ block_t *p_pes;
+ mtime_t i_pts, i_dts, i_length;
- if( i_copy > 0 )
+ uint8_t *p_data;
+ int i_size;
+
+ uint8_t header[50]; // PES header + extra < 50 (more like 17)
+ int i_pes_payload;
+ int i_pes_header;
+
+ int i_pes_count = 1;
+
+ assert( i_max_pes_size >= 0 );
+ assert( i_header_size >= 0 );
+
+ /* NB, Only video ES may have unbounded length */
+ if( !i_max_pes_size ||
+ ( p_fmt->i_cat != VIDEO_ES && i_max_pes_size > PES_PAYLOAD_SIZE_MAX ) )
+ {
+ i_max_pes_size = PES_PAYLOAD_SIZE_MAX;
+ }
+
+ if( p_fmt->i_codec == VLC_CODEC_MP4V &&
+ p_es->i_flags & BLOCK_FLAG_TYPE_I )
+ {
+ /* For MPEG4 video, add VOL before I-frames */
+ p_es = block_Realloc( p_es, p_fmt->i_extra, p_es->i_buffer );
+
+ memcpy( p_es->p_buffer, p_fmt->p_extra, p_fmt->i_extra );
+ }
+
+ i_pts = p_es->i_pts <= 0 ? 0 : p_es->i_pts * 9 / 100; // 90000 units clock
+ i_dts = p_es->i_dts <= 0 ? 0 : p_es->i_dts * 9 / 100; // 90000 units clock
+
+ i_size = p_es->i_buffer;
+ p_data = p_es->p_buffer;
+
+ *pp_pes = p_pes = NULL;
+
+#ifndef NDEBUG
+ memset( header, 0, 50 );
+#endif
+
+ do
+ {
+ i_pes_payload = __MIN( i_size, i_max_pes_size );
+ i_pes_header = PESHeader( header, i_pts, i_dts, i_pes_payload,
+ p_fmt, i_stream_id, b_mpeg2,
+ b_data_alignment, i_header_size );
+ i_dts = 0; // only first PES has a dts/pts
+ i_pts = 0;
+
+ if( p_es )
{
- memcpy( p_pes->p_buffer + bits.i_data, p_data, i_copy );
+ p_es = block_Realloc( p_es, i_pes_header, p_es->i_buffer );
+ p_data = p_es->p_buffer+i_pes_header;
+ /* reuse p_es for first frame */
+ *pp_pes = p_pes = p_es;
+ /* don't touch i_dts, i_pts, i_length as are already set :) */
+ p_es = NULL;
}
+ else
+ {
+ p_pes->p_next = block_New( p_sout, i_pes_header + i_pes_payload );
+ p_pes = p_pes->p_next;
- i_size -= i_copy;
- p_data += i_copy;
- p_pes->i_size = bits.i_data + i_copy;
+ p_pes->i_dts = 0;
+ p_pes->i_pts = 0;
+ p_pes->i_length = 0;
+ if( i_pes_payload > 0 )
+ {
+ vlc_memcpy( p_pes->p_buffer + i_pes_header, p_data,
+ i_pes_payload );
+ }
+ i_pes_count++;
+ }
+ /* copy header */
+ memcpy( p_pes->p_buffer, header, i_pes_header );
+
+ i_size -= i_pes_payload;
+ p_data += i_pes_payload;
+ p_pes->i_buffer = i_pes_header + i_pes_payload;
} while( i_size > 0 );
- sout_BufferDelete( p_sout, p_es );
- return( 0 );
-}
+ /* Now redate all pes */
+ i_dts = (*pp_pes)->i_dts;
+ i_length = (*pp_pes)->i_length / i_pes_count;
+ for( p_pes = *pp_pes; p_pes != NULL; p_pes = p_pes->p_next )
+ {
+ p_pes->i_dts = i_dts;
+ p_pes->i_length = i_length;
+
+ i_dts += i_length;
+ }
+ return 0;
+}
projects / vlc / blobdiff