1 /*****************************************************************************
2 * input.c: input thread
3 * Read an MPEG2 stream, demultiplex and parse it before sending it to
5 *****************************************************************************
6 * Copyright (C) 1998, 1999, 2000 VideoLAN
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 GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 02111-1307, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
29 #include <errno.h> /* errno */
30 #include <sys/types.h> /* on BSD, uio.h needs types.h */
31 #include <sys/uio.h> /* "input.h" */
32 #include <string.h> /* strerror() */
34 #include <stdlib.h> /* free() */
35 #include <netinet/in.h> /* ntohs() */
45 #include "input_psi.h"
46 #include "input_pcr.h"
47 #include "input_netlist.h"
48 #include "decoder_fifo.h"
49 #include "input_file.h"
50 #include "input_network.h"
52 #include "audio_output.h" /* aout_thread_t */
54 #include "audio_decoder.h" /* adec_thread_t */
56 #include "ac3_decoder.h" /* ac3dec_t (for ac3_decoder_thread.h) */
57 #include "ac3_decoder_thread.h" /* ac3dec_thread_t */
59 #include "video.h" /* picture_t (for video_output.h) */
60 #include "video_output.h" /* vout_thread_t */
62 #include "vdec_idct.h" /* dctelem_t (for video_parser.h) */
63 #include "vdec_motion.h" /* f_motion_t (for video_parser.h) */
64 #include "vpar_blocks.h" /* macroblock_t (for video_parser.h) */
65 #include "vpar_headers.h" /* sequence_t (for video_parser.h) */
66 #include "vpar_synchro.h" /* video_synchro_t (for video_parser.h) */
67 #include "video_parser.h" /* vpar_thread_t */
69 #include "spu_decoder.h" /* spudec_thread_t */
73 /*****************************************************************************
75 *****************************************************************************/
76 static void RunThread ( input_thread_t *p_input );
77 static void ErrorThread ( input_thread_t *p_input );
78 static void EndThread ( input_thread_t *p_input );
80 static __inline__ int input_ReadPacket( input_thread_t *p_input );
81 static __inline__ void input_SortPacket( input_thread_t *p_input,
82 ts_packet_t *ts_packet );
83 static __inline__ void input_DemuxTS( input_thread_t *p_input,
84 ts_packet_t *ts_packet,
85 es_descriptor_t *es_descriptor );
86 static __inline__ void input_DemuxPES( input_thread_t *p_input,
87 ts_packet_t *ts_packet,
88 es_descriptor_t *p_es_descriptor,
89 boolean_t b_unit_start, boolean_t b_packet_lost );
90 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
91 ts_packet_t *ts_packet,
92 es_descriptor_t *p_es_descriptor,
93 boolean_t b_unit_start, boolean_t b_packet_lost );
95 /*****************************************************************************
96 * input_CreateThread: creates a new input thread
97 *****************************************************************************
98 * This function creates a new input, and returns a pointer
99 * to its description. On error, it returns NULL.
100 * If pi_status is NULL, then the function will block until the thread is ready.
101 * If not, it will be updated using one of the THREAD_* constants.
102 *****************************************************************************/
103 input_thread_t *input_CreateThread ( int i_method, char *psz_source, int i_port, int i_vlan,
104 p_vout_thread_t p_vout, p_aout_thread_t p_aout, int *pi_status )
106 input_thread_t * p_input; /* thread descriptor */
107 int i_status; /* thread status */
108 int i_index; /* index for tables initialization */
110 /* Allocate descriptor */
112 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
113 if( p_input == NULL )
115 intf_ErrMsg("error: %s\n", strerror(ENOMEM));
119 /* Initialize thread properties */
121 p_input->b_error = 0;
122 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
123 *p_input->pi_status = THREAD_CREATE;
125 /* Initialize input method description */
126 p_input->i_method = i_method;
127 p_input->psz_source = psz_source;
128 p_input->i_port = i_port;
129 p_input->i_vlan = i_vlan;
132 case INPUT_METHOD_TS_FILE: /* file methods */
133 p_input->p_Open = input_FileOpen;
134 p_input->p_Read = input_FileRead;
135 p_input->p_Close = input_FileClose;
137 case INPUT_METHOD_TS_VLAN_BCAST: /* vlan network method */
138 if( !p_main->b_vlans )
140 intf_ErrMsg("error: vlans are not activated\n");
144 /* ... pass through */
145 case INPUT_METHOD_TS_UCAST: /* network methods */
146 case INPUT_METHOD_TS_MCAST:
147 case INPUT_METHOD_TS_BCAST:
148 p_input->p_Open = input_NetworkOpen;
149 p_input->p_Read = input_NetworkRead;
150 p_input->p_Close = input_NetworkClose;
153 intf_ErrMsg("error: unknow input method\n");
159 /* Initialize stream description */
160 for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
162 p_input->p_es[i_index].i_id = EMPTY_PID;
163 p_input->pp_selected_es[i_index] = NULL;
166 /* Initialize default settings for spawned decoders */
167 p_input->p_aout = p_aout;
168 p_input->p_vout = p_vout;
171 /* Initialize statistics */
172 p_input->c_loops = 0;
173 p_input->c_bytes = 0;
174 p_input->c_payload_bytes = 0;
175 p_input->c_packets_read = 0;
176 p_input->c_packets_trashed = 0;
179 /* Initialize PSI and PCR decoders */
180 if( input_PsiInit( p_input ) )
186 if( input_PcrInit( p_input ) )
188 input_PsiEnd( p_input );
193 /* Initialize netlists */
194 if( input_NetlistInit( p_input ) )
196 input_PsiEnd( p_input );
197 input_PcrEnd( p_input );
202 intf_DbgMsg("configuration: method=%d, source=%s, port=%d, vlan=%d\n",
203 i_method, psz_source, i_port, i_vlan );
205 /* Let the appropriate method open the socket. */
206 if( p_input->p_Open( p_input ) )
208 input_NetlistEnd( p_input );
209 input_PsiEnd( p_input );
210 input_PcrEnd( p_input );
215 /* Create thread and set locks. */
216 vlc_mutex_init( &p_input->netlist.lock );
217 vlc_mutex_init( &p_input->programs_lock );
218 vlc_mutex_init( &p_input->es_lock );
219 if( vlc_thread_create(&p_input->thread_id, "input", (void *) RunThread, (void *) p_input) )
221 intf_ErrMsg("error: %s\n", strerror(errno) );
222 p_input->p_Close( p_input );
223 input_NetlistEnd( p_input );;
224 input_PsiEnd( p_input );
225 input_PcrEnd( p_input );
230 intf_Msg("Input initialized\n");
232 /* If status is NULL, wait until the thread is created */
233 if( pi_status == NULL )
237 msleep( THREAD_SLEEP );
238 }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
239 && (i_status != THREAD_FATAL) );
240 if( i_status != THREAD_READY )
248 /*****************************************************************************
249 * input_DestroyThread: mark an input thread as zombie
250 *****************************************************************************
251 * This function should not return until the thread is effectively cancelled.
252 *****************************************************************************/
253 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
255 int i_status; /* thread status */
258 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
259 *p_input->pi_status = THREAD_DESTROY;
261 /* Request thread destruction */
264 /* If status is NULL, wait until thread has been destroyed */
265 if( pi_status == NULL )
269 msleep( THREAD_SLEEP );
270 }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
271 && (i_status != THREAD_FATAL) );
276 /*****************************************************************************
277 * input_OpenAudioStream: open an audio stream
278 *****************************************************************************
279 * This function spawns an audio decoder and plugs it on the audio output
281 *****************************************************************************/
282 int input_OpenAudioStream( input_thread_t *p_input, int i_id )
287 /*****************************************************************************
288 * input_CloseAudioStream: close an audio stream
289 *****************************************************************************
290 * This function destroys an audio decoder.
291 *****************************************************************************/
292 void input_CloseAudioStream( input_thread_t *p_input, int i_id )
297 /*****************************************************************************
298 * input_OpenVideoStream: open a video stream
299 *****************************************************************************
300 * This function spawns a video decoder and plugs it on a video output thread.
301 *****************************************************************************/
302 int input_OpenVideoStream( input_thread_t *p_input,
303 struct vout_thread_s *p_vout, struct video_cfg_s * p_cfg )
308 /*****************************************************************************
309 * input_CloseVideoStream: close a video stream
310 *****************************************************************************
311 * This function destroys an video decoder.
312 *****************************************************************************/
313 void input_CloseVideoStream( input_thread_t *p_input, int i_id )
319 /* following functions are local */
321 /*****************************************************************************
322 * InitThread: initialize input thread
323 *****************************************************************************
324 * This function is called from RunThread and performs the second step of the
325 * initialization. It returns 0 on success. Note that the thread's flag are not
326 * modified inside this function.
327 *****************************************************************************/
328 static int InitThread( input_thread_t *p_input )
330 /* Mark thread as running and return */
332 *p_input->pi_status = THREAD_READY;
333 intf_DbgMsg("thread ready\n");
337 /*****************************************************************************
338 * RunThread: main thread loop
339 *****************************************************************************
340 * Thread in charge of processing the network packets and demultiplexing.
341 *****************************************************************************/
342 static void RunThread( input_thread_t *p_input )
345 * Initialize thread and free configuration
347 p_input->b_error = InitThread( p_input );
348 if( p_input->b_error )
350 free( p_input ); /* destroy descriptor */
358 while( !p_input->b_die && !p_input->b_error )
360 /* Scatter read the UDP packet from the network or the file. */
361 if( (input_ReadPacket( p_input )) == (-1) )
363 /* FIXME??: Normally, a thread can't kill itself, but we don't have
364 * any method in case of an error condition ... */
365 p_input->b_error = 1;
376 if( p_input->b_error )
378 ErrorThread( p_input );
382 EndThread( p_input );
383 intf_DbgMsg("thread end\n");
387 /*****************************************************************************
388 * ErrorThread: RunThread() error loop
389 *****************************************************************************
390 * This function is called when an error occured during thread main's loop.
391 *****************************************************************************/
392 static void ErrorThread( input_thread_t *p_input )
394 /* Wait until a `die' order */
396 while( !p_input->b_die )
399 msleep( VOUT_IDLE_SLEEP );
403 /*****************************************************************************
404 * EndThread: end the input thread
405 *****************************************************************************/
406 static void EndThread( input_thread_t * p_input )
408 int * pi_status; /* threas status */
409 int i_es_loop; /* es index */
413 pi_status = p_input->pi_status;
414 *pi_status = THREAD_END;
416 /* Close input method */
417 p_input->p_Close( p_input );
419 /* Destroy all decoder threads */
421 (i_es_loop < INPUT_MAX_ES) && (p_input->pp_selected_es[i_es_loop] != NULL) ;
424 switch( p_input->pp_selected_es[i_es_loop]->i_type )
429 vdec_DestroyThread( (vdec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
431 vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
436 adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
439 ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
442 spudec_DestroyThread( (spudec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
445 /* Special streams for the PSI decoder, PID 0 and 1 */
449 intf_DbgMsg("error: unknown decoder type %d\n", p_input->pp_selected_es[i_es_loop]->i_type );
455 input_NetlistEnd( p_input ); /* clean netlist */
456 input_PsiEnd( p_input ); /* clean PSI information */
457 input_PcrEnd( p_input ); /* clean PCR information */
458 free( p_input ); /* free input_thread structure */
461 *pi_status = THREAD_OVER;
464 /*****************************************************************************
465 * input_ReadPacket: reads a packet from the network or the file
466 *****************************************************************************/
467 static __inline__ int input_ReadPacket( input_thread_t *p_input )
469 int i_base_index; /* index of the first free iovec */
472 #ifdef INPUT_LIFO_TS_NETLIST
473 int i_meanwhile_released;
474 int i_currently_removed;
476 ts_packet_t * p_ts_packet;
478 /* In this function, we only care about the TS netlist. PES netlist
479 * is for the demultiplexer. */
480 #ifdef INPUT_LIFO_TS_NETLIST
481 i_base_index = p_input->netlist.i_ts_index;
483 /* Verify that we still have packets in the TS netlist */
484 if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
486 intf_ErrMsg("input error: TS netlist is empty !\n");
490 #else /* FIFO netlist */
491 i_base_index = p_input->netlist.i_ts_start;
492 if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
494 /* The netlist is splitted in 2 parts. We must gather them to consolidate
495 the FIFO (we make the loop easily in having the same iovec at the far
496 end and in the beginning of netlist_free).
497 That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
499 memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
500 p_input->netlist.p_ts_free,
501 (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
502 * sizeof(struct iovec) );
505 /* Verify that we still have packets in the TS netlist */
506 if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
508 intf_ErrMsg("input error: TS netlist is empty !\n");
511 #endif /* FIFO netlist */
513 /* Scatter read the buffer. */
514 i_packet_size = (*p_input->p_Read)( p_input,
515 &p_input->netlist.p_ts_free[i_base_index],
516 INPUT_TS_READ_ONCE );
517 if( i_packet_size == (-1) )
520 intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
521 &p_input->netlist.p_ts_free[i_base_index],
522 p_input->netlist.i_ts_start,
523 p_input->netlist.i_ts_end);
525 intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
529 if( i_packet_size == 0 )
531 /* No packet has been received, so stop here. */
535 /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
536 for( i_current_index = i_base_index;
537 (i_packet_size -= TS_PACKET_SIZE) >= 0;
540 /* BTW, something REALLY bad could happen if we receive packets with
542 p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
543 /* Don't cry :-), we are allowed to do that cast, because initially,
544 our buffer was malloc'ed with sizeof(ts_packet_t) */
546 /* Find out if we need this packet and demultiplex. */
547 input_SortPacket( p_input /* for current PIDs and netlist */,
551 if( i_packet_size > 0 )
553 intf_ErrMsg("input error: wrong size\n");
557 /* Remove the TS packets we have just filled from the netlist */
558 #ifdef INPUT_LIFO_TS_NETLIST
559 /* We need to take a lock here while we're calculating index positions. */
560 vlc_mutex_lock( &p_input->netlist.lock );
562 i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
563 if( i_meanwhile_released )
565 /* That's where it becomes funny :-). Since we didn't take locks for
566 efficiency reasons, other threads (including ourselves, with
567 input_DemuxPacket) might have released packets to the netlist.
568 So we have to copy these iovec where they should go.
570 BTW, that explains why the TS netlist is
571 (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */
573 i_currently_removed = i_current_index - i_base_index;
574 if( i_meanwhile_released < i_currently_removed )
576 /* Copy all iovecs in that case */
577 memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
578 + i_currently_removed,
579 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
580 i_meanwhile_released * sizeof(struct iovec) );
584 /* We have fewer places than items, so we only move
585 i_currently_removed of them. */
586 memcpy( &p_input->netlist.p_ts_free[i_base_index],
587 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
588 i_currently_removed * sizeof(struct iovec) );
591 /* Update i_netlist_index with the information gathered above. */
592 p_input->netlist.i_ts_index += i_currently_removed;
596 /* Nothing happened. */
597 p_input->netlist.i_ts_index = i_current_index;
600 vlc_mutex_unlock( &p_input->netlist.lock );
602 #else /* FIFO netlist */
603 /* & is modulo ; that's where we make the loop. */
604 p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
608 p_input->c_packets_read += i_current_index - i_base_index;
609 p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
614 /*****************************************************************************
615 * input_SortPacket: find out whether we need that packet
616 *****************************************************************************/
617 static __inline__ void input_SortPacket( input_thread_t *p_input,
618 ts_packet_t *p_ts_packet )
623 /* Verify that sync_byte, error_indicator and scrambling_control are
625 if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
626 (p_ts_packet->buffer[3] & 0xc0) )
628 intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
632 /* Get the PID of the packet. Note that ntohs is needed, for endianness
633 purposes (see man page). */
634 i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;
636 //intf_DbgMsg("input debug: pid %d received (%p)\n",
637 // i_current_pid, p_ts_packet);
639 /* Lock current ES state. */
640 vlc_mutex_lock( &p_input->es_lock );
642 /* Verify that we actually want this PID. */
643 for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
645 if( p_input->pp_selected_es[i_es_loop] != NULL)
647 if( (*p_input->pp_selected_es[i_es_loop]).i_id
650 /* Don't need the lock anymore, since the value pointed
651 out by p_input->pp_selected_es[i_es_loop] can only be
652 modified from inside the input_thread (by the PSI
653 decoder): interface thread is only allowed to modify
654 the pp_selected_es table */
655 vlc_mutex_unlock( &p_input->es_lock );
657 /* We're interested. Pass it to the demultiplexer. */
658 input_DemuxTS( p_input, p_ts_packet,
659 p_input->pp_selected_es[i_es_loop] );
665 /* pp_selected_es should not contain any hole. */
669 vlc_mutex_unlock( &p_input->es_lock );
672 /* We weren't interested in receiving this packet. Give it back to the
674 //intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
675 // U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
676 input_NetlistFreeTS( p_input, p_ts_packet );
678 p_input->c_packets_trashed++;
682 /*****************************************************************************
683 * input_DemuxTS: first step of demultiplexing: the TS header
684 *****************************************************************************
685 * Stream must also only contain PES and PSI, so PID must have been filtered
686 *****************************************************************************/
687 static __inline__ void input_DemuxTS( input_thread_t *p_input,
688 ts_packet_t *p_ts_packet,
689 es_descriptor_t *p_es_descriptor )
692 boolean_t b_adaption; /* Adaption field is present */
693 boolean_t b_payload; /* Packet carries payload */
694 boolean_t b_unit_start; /* A PSI or a PES start in the packet */
695 boolean_t b_trash = 0; /* Must the packet be trashed ? */
696 boolean_t b_lost = 0; /* Was there a packet lost ? */
700 ASSERT(p_es_descriptor);
702 #define p (p_ts_packet->buffer)
704 //intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
705 // p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
708 p_es_descriptor->c_packets++;
709 p_es_descriptor->c_bytes += TS_PACKET_SIZE;
712 /* Extract flags values from TS common header. */
713 b_unit_start = (p[1] & 0x40);
714 b_adaption = (p[3] & 0x20);
715 b_payload = (p[3] & 0x10);
717 /* Extract adaption field informations if any */
720 /* We don't have any adaptation_field, so payload start immediately
721 after the 4 byte TS header */
722 p_ts_packet->i_payload_start = 4;
726 /* p[4] is adaptation_field_length minus one */
727 p_ts_packet->i_payload_start = 5 + p[4];
729 /* The adaption field can be limited to the adaptation_field_length byte,
730 so that there is nothing to do: skip this possibility */
733 /* If the packet has both adaptation_field and payload, adaptation_field
734 cannot be more than 182 bytes long; if there is only an
735 adaptation_field, it must fill the next 183 bytes. */
736 if( b_payload ? (p[4] > 182) : (p[4] != 183) )
738 intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
741 p_es_descriptor->c_invalid_packets++;
746 /* No we are sure that the byte containing flags is present: read it */
749 /* discontinuity_indicator */
752 intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
753 "(position read: %d, saved: %d)\n", p[5] & 0x80,
754 p_es_descriptor->i_continuity_counter);
756 /* If the PID carries the PCR, there will be a system time-base
757 discontinuity. We let the PCR decoder handle that. */
758 p_es_descriptor->b_discontinuity = 1;
760 /* There also may be a continuity_counter discontinuity:
761 resynchronise our counter with the one of the stream */
762 p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
765 /* random_access_indicator */
766 p_es_descriptor->b_random |= p[5] & 0x40;
768 /* If this is a PCR_PID, and this TS packet contains a PCR,
769 we pass it along to the PCR decoder. */
770 if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
772 /* There should be a PCR field in the packet, check if the
773 adaption field is long enough to carry it */
776 /* Call the PCR decoder */
777 input_PcrDecode( p_input, p_es_descriptor, &p[6] );
784 /* Check the continuity of the stream. */
785 i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
788 /* Everything is ok, just increase our counter */
789 p_es_descriptor->i_continuity_counter++;
793 if( !b_payload && i_dummy == 0 )
795 /* This is a packet without payload, this is allowed by the draft
796 As there is nothing interessant in this packet (except PCR that
797 have already been handled), we can trash the packet. */
798 intf_DbgMsg("Packet without payload received by TS demux\n");
801 else if( i_dummy <= 0 )
803 /* Duplicate packet: mark it as being to be trashed. */
804 intf_DbgMsg("Duplicate packet received by TS demux\n");
807 else if( p_es_descriptor->i_continuity_counter == 0xFF )
809 /* This means that the packet is the first one we receive for this
810 ES since the continuity counter ranges between 0 and 0x0F
811 excepts when it has been initialized by the input: Init the
812 counter to the correct value. */
813 intf_DbgMsg("First packet for PID %d received by TS demux\n",
814 p_es_descriptor->i_id);
815 p_es_descriptor->i_continuity_counter = (p[3] & 0x0f);
819 /* This can indicate that we missed a packet or that the
820 continuity_counter wrapped and we received a dup packet: as we
821 don't know, do as if we missed a packet to be sure to recover
822 from this situation */
823 intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
824 p_es_descriptor->i_continuity_counter & 0x0f,
827 p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
831 /* Trash the packet if it has no payload or if it is bad */
834 input_NetlistFreeTS( p_input, p_ts_packet );
836 p_input->c_packets_trashed++;
841 if( p_es_descriptor->b_psi )
843 /* The payload contains PSI tables */
844 input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
845 b_unit_start, b_lost );
849 /* The payload carries a PES stream */
850 input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
851 b_unit_start, b_lost );
861 /*****************************************************************************
863 *****************************************************************************
864 * Gather a PES packet and analyzes its header.
865 *****************************************************************************/
866 static __inline__ void input_DemuxPES( input_thread_t *p_input,
867 ts_packet_t *p_ts_packet,
868 es_descriptor_t *p_es_descriptor,
869 boolean_t b_unit_start,
870 boolean_t b_packet_lost )
872 decoder_fifo_t * p_fifo;
873 u8 i_pes_header_size;
875 pes_packet_t* p_last_pes;
877 int i_ts_payload_size;
880 #define p_pes (p_es_descriptor->p_pes_packet)
884 ASSERT(p_es_descriptor);
886 //intf_DbgMsg("PES-demultiplexing %p (%p)\n", p_ts_packet, p_pes);
888 /* If we lost data, discard the PES packet we are trying to reassemble
889 if any and wait for the beginning of a new one in order to synchronise
891 if( b_packet_lost && p_pes != NULL )
893 intf_DbgMsg("PES %p trashed because of packet lost\n", p_pes);
894 input_NetlistFreePES( p_input, p_pes );
898 /* If the TS packet contains the begining of a new PES packet, and if we
899 were reassembling a PES packet, then the PES should be complete now,
900 so parse its header and give it to the decoders */
901 if( b_unit_start && p_pes != NULL )
903 //intf_DbgMsg("End of PES packet %p\n", p_pes);
905 /* Parse the header. The header has a variable length, but in order
906 to improve the algorithm, we will read the 14 bytes we may be
908 p_ts = p_pes->p_first_ts;
909 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
912 if(i_ts_payload_size >= PES_HEADER_SIZE)
914 /* This part of the header entirely fits in the payload of
915 the first TS packet */
916 p_pes->p_pes_header = &(p_ts->buffer[p_ts->i_payload_start]);
920 /* This part of the header does not fit in the current TS packet:
921 copy the part of the header we are interested in to the
922 p_pes_header_save buffer. The buffer is dynamicly allocated if
923 needed so it's time expensive but this situation almost never occur. */
924 intf_DbgMsg("Code never tested encountered, WARNING ! (benny)\n");
925 if( !p_pes->p_pes_header_save )
927 p_pes->p_pes_header_save = malloc(PES_HEADER_SIZE);
932 memcpy(p_pes->p_pes_header_save + i_dummy,
933 &p_ts->buffer[p_ts->i_payload_start], i_ts_payload_size);
934 i_dummy += i_ts_payload_size;
936 p_ts = p_ts->p_next_ts;
939 /* The payload of the PES packet is shorter than the 14 bytes
940 we would read. This means that high packet lost occured
941 so the PES won't be usefull for any decoder. Moreover,
942 this should never happen so we can trash the packet and
943 exit roughly without regrets */
944 intf_DbgMsg("PES packet too short: trashed\n");
945 input_NetlistFreePES( p_input, p_pes );
951 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
953 while(i_ts_payload_size + i_dummy < PES_HEADER_SIZE);
955 /* This last TS packet is partly header, partly payload, so just
956 copy the header part */
957 memcpy(p_pes->p_pes_header_save + i_dummy,
958 &p_ts->buffer[p_ts->i_payload_start],
959 PES_HEADER_SIZE - i_dummy);
961 /* The header must be read in the buffer not in any TS packet */
962 p_pes->p_pes_header = p_pes->p_pes_header_save;
965 /* Now we have the part of the PES header we were interested in:
968 /* First read the 6 header bytes common to all PES packets:
969 use them to test the PES validity */
970 if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
971 (p_pes->p_pes_header[2] != 1)) ||
972 /* packet_start_code_prefix != 0x000001 */
973 ((i_dummy = U16_AT(p_pes->p_pes_header + 4)) &&
974 (i_dummy + 6 != p_pes->i_pes_size)) )
975 /* PES_packet_length is set and != total received payload */
977 /* Trash the packet and set p_pes to NULL to be sure the next PES
978 packet will have its b_data_lost flag set */
979 intf_DbgMsg("Corrupted PES packet received: trashed\n");
980 input_NetlistFreePES( p_input, p_pes );
986 /* The PES packet is valid. Check its type to test if it may
987 carry additional informations in a header extension */
988 p_pes->i_stream_id = p_pes->p_pes_header[3];
990 switch( p_pes->i_stream_id )
992 case 0xBE: /* Padding */
993 case 0xBC: /* Program stream map */
994 case 0xBF: /* Private stream 2 */
997 case 0xFF: /* Program stream directory */
998 case 0xF2: /* DSMCC stream */
999 case 0xF8: /* ITU-T H.222.1 type E stream */
1000 /* The payload begins immediatly after the 6 bytes header, so
1001 we have finished with the parsing */
1002 i_pes_header_size = 6;
1006 /* The PES header contains at least 3 more bytes: parse them */
1007 p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x04;
1008 p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x80;
1009 i_pes_header_size = p_pes->p_pes_header[8] + 9;
1011 /* Now parse the optional header extensions (in the limit of
1013 if( p_pes->b_has_pts )
1015 pcr_descriptor_t * p_pcr;
1017 p_pcr = p_input->p_pcr;
1020 ( ((mtime_t)(p_pes->p_pes_header[9] & 0x0E) << 29) |
1021 (((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) - (1 << 14)) |
1022 ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) ) * 300;
1025 if( p_pcr->i_synchro_state )
1027 switch( p_pcr->i_synchro_state )
1029 case SYNCHRO_NOT_STARTED:
1030 p_pes->b_has_pts = 0;
1034 p_pes->i_pts += p_pcr->delta_pcr;
1035 p_pcr->delta_absolute = mdate() - p_pes->i_pts + INPUT_PTS_DELAY;
1036 p_pes->i_pts += p_pcr->delta_absolute;
1037 p_pcr->i_synchro_state = 0;
1040 case SYNCHRO_REINIT: /* We skip a PES */
1041 p_pes->b_has_pts = 0;
1042 p_pcr->i_synchro_state = SYNCHRO_START;
1048 p_pes->i_pts += p_pcr->delta_pcr + p_pcr->delta_absolute;
1054 /* Now we've parsed the header, we just have to indicate in some
1055 specific TS packets where the PES payload begins (renumber
1056 i_payload_start), so that the decoders can find the beginning
1057 of their data right out of the box. */
1058 p_ts = p_pes->p_first_ts;
1059 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
1060 while( i_pes_header_size > i_ts_payload_size )
1062 /* These packets are entirely filled by the PES header. */
1063 i_pes_header_size -= i_ts_payload_size;
1064 p_ts->i_payload_start = p_ts->i_payload_end;
1065 /* Go to the next TS packet: here we won't have to test it is
1066 not NULL because we trash the PES packets when packet lost
1068 p_ts = p_ts->p_next_ts;
1069 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
1071 /* This last packet is partly header, partly payload. */
1072 p_ts->i_payload_start += i_pes_header_size;
1075 /* Now we can eventually put the PES packet in the decoder's
1077 switch( p_es_descriptor->i_type )
1079 case MPEG1_VIDEO_ES:
1080 case MPEG2_VIDEO_ES:
1082 p_fifo = &(((vdec_thread_t*)(p_es_descriptor->p_dec))->fifo);
1084 p_fifo = &(((vpar_thread_t*)(p_es_descriptor->p_dec))->fifo);
1088 case MPEG1_AUDIO_ES:
1089 case MPEG2_AUDIO_ES:
1090 p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
1095 /* we skip 4 bytes at the beginning of the AC3 payload */
1096 p_ts->i_payload_start += 4;
1098 p_fifo = &(((ac3dec_thread_t *)(p_es_descriptor->p_dec))->fifo);
1102 /* we skip 4 bytes at the beginning of the subpicture payload */
1103 p_ts->i_payload_start += 4;
1104 p_fifo = &(((spudec_thread_t *)(p_es_descriptor->p_dec))->fifo);
1108 /* This should never happen */
1109 intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
1110 p_es_descriptor->i_id, p_es_descriptor->i_type);
1115 if( p_fifo != NULL )
1117 vlc_mutex_lock( &p_fifo->data_lock );
1118 if( DECODER_FIFO_ISFULL( *p_fifo ) )
1120 /* The FIFO is full !!! This should not happen. */
1122 p_input->c_packets_trashed += p_pes->i_ts_packets;
1123 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
1125 input_NetlistFreePES( p_input, p_pes );
1126 intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
1127 p_es_descriptor->i_id, p_es_descriptor->i_type);
1131 //intf_DbgMsg("Putting %p into fifo %p/%d\n",
1132 // p_pes, p_fifo, p_fifo->i_end);
1133 p_fifo->buffer[p_fifo->i_end] = p_pes;
1134 DECODER_FIFO_INCEND( *p_fifo );
1136 /* Warn the decoder that it's got work to do. */
1137 vlc_cond_signal( &p_fifo->data_wait );
1139 vlc_mutex_unlock( &p_fifo->data_lock );
1143 intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
1145 p_input->c_packets_trashed += p_pes->i_ts_packets;
1146 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
1148 input_NetlistFreePES( p_input, p_pes );
1154 /* If we are at the beginning of a new PES packet, we must fetch a new
1155 PES buffer to begin with the reassembly of this PES packet. This is
1156 also here that we can synchronise with the stream if we we lost
1157 packets or if the decoder has just started */
1162 /* Get a new one PES from the PES netlist. */
1163 if( (p_pes = input_NetlistGetPES( p_input )) == (NULL) )
1165 /* PES netlist is empty ! */
1166 p_input->b_error = 1;
1170 //intf_DbgMsg("New PES packet %p (first TS: %p)\n", p_pes, p_ts_packet);
1172 /* Init the PES fields so that the first TS packet could be correctly
1173 added to the PES packet (see below) */
1174 p_pes->p_first_ts = p_ts_packet;
1175 p_pes->p_last_ts = NULL;
1177 /* If the last pes packet was null, this means that the synchronisation
1178 was lost and so warn the decoder that he will have to find a way to
1181 p_pes->b_data_loss = 1;
1183 /* Read the b_random_access flag status and then reinit it */
1184 p_pes->b_random_access = p_es_descriptor->b_random;
1185 p_es_descriptor->b_random = 0;
1190 /* If we are synchronised with the stream, and so if we are ready to
1191 receive correctly the data, add the TS packet to the current PES
1195 //intf_DbgMsg("Adding TS %p to PES %p\n", p_ts_packet, p_pes);
1197 /* Size of the payload carried in the TS packet */
1198 i_ts_payload_size = p_ts_packet->i_payload_end -
1199 p_ts_packet->i_payload_start;
1201 /* Update the relations between the TS packets */
1202 p_ts_packet->p_prev_ts = p_pes->p_last_ts;
1203 p_ts_packet->p_next_ts = NULL;
1204 if( p_pes->i_ts_packets != 0 )
1206 /* Regarder si il serait pas plus efficace de ne creer que les liens
1207 precedent->suivant pour le moment, et les liens suivant->precedent
1208 quand le paquet est termine */
1209 /* Otherwise it is the first TS packet. */
1210 p_pes->p_last_ts->p_next_ts = p_ts_packet;
1212 /* Now add the TS to the PES packet */
1213 p_pes->p_last_ts = p_ts_packet;
1214 p_pes->i_ts_packets++;
1215 p_pes->i_pes_size += i_ts_payload_size;
1219 i_dummy = p_ts_packet->i_payload_end - p_ts_packet->i_payload_start;
1220 p_es_descriptor->c_payload_bytes += i_dummy;
1225 /* Since we don't use the TS packet to build a PES packet, we don't
1226 need it anymore, so give it back to the netlist */
1227 //intf_DbgMsg("Trashing TS %p: no PES being build\n", p_ts_packet);
1228 input_NetlistFreeTS( p_input, p_ts_packet );
1237 /*****************************************************************************
1239 *****************************************************************************
1240 * Notice that current ES state has been locked by input_SortPacket. (No more true,
1241 * changed by benny - FIXME: See if it's ok, and definitely change the code ?? )
1242 *****************************************************************************/
1243 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
1244 ts_packet_t *p_ts_packet,
1245 es_descriptor_t *p_es_descriptor,
1246 boolean_t b_unit_start, boolean_t b_packet_lost )
1248 int i_data_offset; /* Offset of the interesting data in the TS packet */
1249 u16 i_data_length; /* Length of those data */
1250 //boolean_t b_first_section; /* Was there another section in the TS packet ? */
1253 ASSERT(p_ts_packet);
1254 ASSERT(p_es_descriptor);
1256 #define p_psi (p_es_descriptor->p_psi_section)
1258 //intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
1260 //intf_DbgMsg( "Packet: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x (unit start: %d)\n", p_ts_packet->buffer[p_ts_packet->i_payload_start], p_ts_packet->buffer[p_ts_packet->i_payload_start+1], p_ts_packet->buffer[p_ts_packet->i_payload_start+2], p_ts_packet->buffer[p_ts_packet->i_payload_start+3], p_ts_packet->buffer[p_ts_packet->i_payload_start+4], p_ts_packet->buffer[p_ts_packet->i_payload_start+5], p_ts_packet->buffer[p_ts_packet->i_payload_start+6], p_ts_packet->buffer[p_ts_packet->i_payload_start+7], p_ts_packet->buffer[p_ts_packet->i_payload_start+8], p_ts_packet->buffer[p_ts_packet->i_payload_start+9], p_ts_packet->buffer[p_ts_packet->i_payload_start+10], p_ts_packet->buffer[p_ts_packet->i_payload_start+11], p_ts_packet->buffer[p_ts_packet->i_payload_start+12], p_ts_packet->buffer[p_ts_packet->i_payload_start+13], p_ts_packet->buffer[p_ts_packet->i_payload_start+14], p_ts_packet->buffer[p_ts_packet->i_payload_start+15], p_ts_packet->buffer[p_ts_packet->i_payload_start+16], p_ts_packet->buffer[p_ts_packet->i_payload_start+17], p_ts_packet->buffer[p_ts_packet->i_payload_start+18], p_ts_packet->buffer[p_ts_packet->i_payload_start+19], p_ts_packet->buffer[p_ts_packet->i_payload_start+20], b_unit_start);
1263 /* Try to find the beginning of the payload in the packet to initialise
1264 the do-while loop that follows -> Compute the i_data_offset variable:
1265 by default, the value is set so that we won't enter in the while loop.
1266 It will be set to a correct value if the data are not corrupted */
1267 i_data_offset = TS_PACKET_SIZE;
1269 /* Has the reassembly of a section already began in a previous packet ? */
1270 if( p_psi->b_running_section )
1272 /* Was data lost since the last TS packet ? */
1275 /* Discard the packet and wait for the begining of a new one to resynch */
1276 p_psi->b_running_section = 0;
1277 p_psi->i_current_position = 0;
1278 intf_DbgMsg( "PSI section(s) discarded due to packet loss\n" );
1282 /* The data that complete a previously began section are always at
1283 the beginning of the TS payload... */
1284 i_data_offset = p_ts_packet->i_payload_start;
1285 /* ...Unless there is a pointer field, that we have to bypass */
1288 //intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
1291 /* We are looking for the beginning of a new section */
1296 /* Get the offset at which the data for that section can be found
1297 The offset is stored in the pointer_field since we are interested in
1298 the first section of the TS packet. Note that the +1 is to bypass
1299 the pointer field */
1300 i_data_offset = p_ts_packet->i_payload_start +
1301 p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
1302 //intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
1306 /* This may either mean that the TS is bad or that the packet contains
1307 the end of a section that had been discarded in a previous loop:
1308 trash the TS packet since we cannot do anything with those data: */
1309 p_psi->b_running_section = 0;
1310 p_psi->i_current_position = 0;
1311 intf_DbgMsg( "PSI packet discarded due to lack of synchronisation\n" );
1315 /* The section we will deal with during the first iteration of the following
1316 loop is the first one contained in the TS packet */
1317 // b_first_section = 1;
1319 /* Reassemble the pieces of sections contained in the TS packet and decode
1320 the sections that could have been completed.
1321 Stop when we reach the end of the packet or stuffing bytes */
1322 while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF )
1324 /* If the current section is a new one, reinit the data fields of the p_psi
1325 struct to start its decoding */
1326 if( !p_psi->b_running_section )
1328 /* Read the length of the new section */
1329 p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
1330 //intf_DbgMsg( "Section length %d\n", p_psi->i_length );
1331 if( p_psi->i_length > PSI_SECTION_SIZE )
1333 /* The TS packet is corrupted, stop here to avoid possible a seg fault */
1334 intf_DbgMsg( "PSI Section size is too big, aborting its reception\n" );
1338 /* Init the reassembly of that section */
1339 p_psi->b_running_section = 1;
1340 p_psi->i_current_position = 0;
1343 /* Compute the length of data related to the section in this TS packet */
1344 if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
1345 i_data_length = TS_PACKET_SIZE - i_data_offset;
1347 i_data_length = p_psi->i_length - p_psi->i_current_position;
1349 /* Copy those data in the section buffer */
1350 memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
1353 /* Interesting data are now after the ones we copied, since no gap is
1354 allowed between 2 sections in a TS packets */
1355 i_data_offset += i_data_length;
1357 /* Decode the packet if it is now complete */
1358 if (p_psi->i_length == p_psi->i_current_position + i_data_length)
1360 /* Packet is complete, decode it */
1361 //intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
1362 input_PsiDecode( p_input, p_psi );
1364 /* Prepare the buffer to receive a new section */
1365 p_psi->i_current_position = 0;
1366 p_psi->b_running_section = 0;
1368 /* The new section won't be the first anymore */
1369 //b_first_section = 0;
1373 /* Prepare the buffer to receive the next part of the section */
1374 p_psi->i_current_position += i_data_length;
1375 //intf_DbgMsg( "Section not complete, waiting for the end\n" );
1378 //intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
1379 // i_data_offset, p_ts_packet->buffer[i_data_offset] );
1382 /* Relase the TS packet, we don't need it anymore */
1383 input_NetlistFreeTS( p_input, p_ts_packet );