1 /*******************************************************************************
2 * input.c: input thread
4 *******************************************************************************
5 * Read an MPEG2 stream, demultiplex and parse it before sending it to
7 ******************************************************************************/
9 /*******************************************************************************
11 *******************************************************************************/
21 #include <sys/ioctl.h>
23 #include <netinet/in.h>
28 #include "vlc_thread.h"
33 #include "input_psi.h"
34 #include "input_pcr.h"
35 #include "input_netlist.h"
36 #include "decoder_fifo.h"
37 #include "input_file.h"
38 #include "input_network.h"
40 #include "audio_output.h"
41 #include "audio_decoder.h"
44 #include "video_output.h"
45 #include "video_decoder.h"
48 /******************************************************************************
50 ******************************************************************************/
51 static void RunThread ( input_thread_t *p_input );
52 static void ErrorThread ( input_thread_t *p_input );
53 static void EndThread ( input_thread_t *p_input );
55 static __inline__ int input_ReadPacket( input_thread_t *p_input );
56 static __inline__ void input_SortPacket( input_thread_t *p_input,
57 ts_packet_t *ts_packet );
58 static __inline__ void input_DemuxTS( input_thread_t *p_input,
59 ts_packet_t *ts_packet,
60 es_descriptor_t *es_descriptor );
61 static __inline__ void input_DemuxPES( input_thread_t *p_input,
62 ts_packet_t *ts_packet,
63 es_descriptor_t *p_es_descriptor,
64 boolean_t b_unit_start, boolean_t b_packet_lost );
65 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
66 ts_packet_t *ts_packet,
67 es_descriptor_t *p_es_descriptor,
68 boolean_t b_unit_start, boolean_t b_packet_lost );
70 /*******************************************************************************
71 * input_CreateThread: creates a new input thread
72 *******************************************************************************
73 * This function creates a new input, and returns a pointer
74 * to its description. On error, it returns NULL.
75 * If pi_status is NULL, then the function will block until the thread is ready.
76 * If not, it will be updated using one of the THREAD_* constants.
77 *******************************************************************************/
78 input_thread_t *input_CreateThread ( int i_method, char *psz_source, int i_port, int i_vlan,
79 p_vout_thread_t p_vout, p_aout_thread_t p_aout, int *pi_status )
81 input_thread_t * p_input; /* thread descriptor */
82 int i_status; /* thread status */
83 int i_index; /* index for tables initialization */
85 /* Allocate descriptor */
87 p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
90 intf_ErrMsg("error: %s\n", strerror(ENOMEM));
94 /* Initialize thread properties */
97 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
98 *p_input->pi_status = THREAD_CREATE;
100 /* Initialize input method description */
101 p_input->i_method = i_method;
102 p_input->psz_source = psz_source;
103 p_input->i_port = i_port;
104 p_input->i_vlan = i_vlan;
107 case INPUT_METHOD_TS_FILE: /* file methods */
108 p_input->p_Open = input_FileOpen;
109 p_input->p_Read = input_FileRead;
110 p_input->p_Close = input_FileClose;
112 case INPUT_METHOD_TS_VLAN_BCAST: /* vlan network method */
113 if( !p_main->b_vlans )
115 intf_ErrMsg("error: vlans are not activated\n");
119 /* ... pass through */
120 case INPUT_METHOD_TS_UCAST: /* network methods */
121 case INPUT_METHOD_TS_MCAST:
122 case INPUT_METHOD_TS_BCAST:
123 p_input->p_Open = input_NetworkOpen;
124 p_input->p_Read = input_NetworkRead;
125 p_input->p_Close = input_NetworkClose;
128 intf_ErrMsg("error: unknow input method\n");
134 /* Initialize stream description */
135 for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
137 p_input->p_es[i_index].i_id = EMPTY_PID;
140 /* Initialize default settings for spawned decoders */
141 p_input->p_aout = p_aout;
142 p_input->p_vout = p_vout;
145 /* Initialize statistics */
146 p_input->c_loops = 0;
147 p_input->c_bytes = 0;
148 p_input->c_payload_bytes = 0;
149 p_input->c_packets_read = 0;
150 p_input->c_packets_trashed = 0;
153 /* Initialize PSI and PCR decoders */
154 if( input_PsiInit( p_input ) )
160 if( input_PcrInit( p_input ) )
162 input_PsiEnd( p_input );
167 /* Initialize netlists */
168 if( input_NetlistInit( p_input ) )
170 input_PsiEnd( p_input );
171 input_PcrEnd( p_input );
176 intf_DbgMsg("configuration: method=%d, source=%s, port=%d, vlan=%d\n",
177 i_method, psz_source, i_port, i_vlan );
179 /* Let the appropriate method open the socket. */
180 if( p_input->p_Open( p_input ) )
182 input_NetlistEnd( p_input );
183 input_PsiEnd( p_input );
184 input_PcrEnd( p_input );
189 /* Create thread and set locks. */
190 vlc_mutex_init( &p_input->netlist.lock );
191 vlc_mutex_init( &p_input->programs_lock );
192 vlc_mutex_init( &p_input->es_lock );
193 if( vlc_thread_create(&p_input->thread_id, "input", (void *) RunThread, (void *) p_input) )
195 intf_ErrMsg("error: %s\n", strerror(errno) );
196 p_input->p_Close( p_input );
197 input_NetlistEnd( p_input );;
198 input_PsiEnd( p_input );
199 input_PcrEnd( p_input );
204 intf_Msg("Input initialized\n");
206 /* If status is NULL, wait until the thread is created */
207 if( pi_status == NULL )
211 msleep( THREAD_SLEEP );
212 }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
213 && (i_status != THREAD_FATAL) );
214 if( i_status != THREAD_READY )
222 /******************************************************************************
223 * input_DestroyThread: mark an input thread as zombie
224 ******************************************************************************
225 * This function should not return until the thread is effectively cancelled.
226 ******************************************************************************/
227 void input_DestroyThread( input_thread_t *p_input, int *pi_status )
229 int i_status; /* thread status */
232 p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
233 *p_input->pi_status = THREAD_DESTROY;
235 /* Request thread destruction */
238 /* If status is NULL, wait until thread has been destroyed */
239 if( pi_status == NULL )
243 msleep( THREAD_SLEEP );
244 }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
245 && (i_status != THREAD_FATAL) );
250 /*******************************************************************************
251 * input_OpenAudioStream: open an audio stream
252 *******************************************************************************
253 * This function spawns an audio decoder and plugs it on the audio output
255 *******************************************************************************/
256 int input_OpenAudioStream( input_thread_t *p_input, int i_id )
261 /*******************************************************************************
262 * input_CloseAudioStream: close an audio stream
263 *******************************************************************************
264 * This function destroys an audio decoder.
265 *******************************************************************************/
266 void input_CloseAudioStream( input_thread_t *p_input, int i_id )
271 /*******************************************************************************
272 * input_OpenVideoStream: open a video stream
273 *******************************************************************************
274 * This function spawns a video decoder and plugs it on a video output thread.
275 *******************************************************************************/
276 int input_OpenVideoStream( input_thread_t *p_input,
277 struct vout_thread_s *p_vout, struct video_cfg_s * p_cfg )
282 /*******************************************************************************
283 * input_CloseVideoStream: close a video stream
284 *******************************************************************************
285 * This function destroys an video decoder.
286 *******************************************************************************/
287 void input_CloseVideoStream( input_thread_t *p_input, int i_id )
293 /* following functions are local */
295 /*******************************************************************************
296 * InitThread: initialize input thread
297 *******************************************************************************
298 * This function is called from RunThread and performs the second step of the
299 * initialization. It returns 0 on success. Note that the thread's flag are not
300 * modified inside this function.
301 *******************************************************************************/
302 static int InitThread( input_thread_t *p_input )
304 /* Mark thread as running and return */
306 *p_input->pi_status = THREAD_READY;
307 intf_DbgMsg("thread ready\n");
311 /*******************************************************************************
312 * RunThread: main thread loop
313 *******************************************************************************
314 * Thread in charge of processing the network packets and demultiplexing.
315 *******************************************************************************/
316 static void RunThread( input_thread_t *p_input )
319 * Initialize thread and free configuration
321 p_input->b_error = InitThread( p_input );
322 if( p_input->b_error )
324 free( p_input ); /* destroy descriptor */
332 while( !p_input->b_die && !p_input->b_error )
334 /* Scatter read the UDP packet from the network or the file. */
335 if( (input_ReadPacket( p_input )) == (-1) )
337 /* ??? Normally, a thread can't kill itself, but we don't have
338 * any method in case of an error condition ... */
339 p_input->b_error = 1;
350 if( p_input->b_error )
352 ErrorThread( p_input );
356 EndThread( p_input );
357 intf_DbgMsg("thread end\n");
361 /******************************************************************************
362 * ErrorThread: RunThread() error loop
363 *******************************************************************************
364 * This function is called when an error occured during thread main's loop.
365 ******************************************************************************/
366 static void ErrorThread( input_thread_t *p_input )
368 /* Wait until a `die' order */
370 while( !p_input->b_die )
373 msleep( VOUT_IDLE_SLEEP );
377 /*******************************************************************************
378 * EndThread: end the input thread
379 *******************************************************************************/
380 static void EndThread( input_thread_t * p_input )
382 int * pi_status; /* threas status */
383 int i_es_loop; /* es index */
387 pi_status = p_input->pi_status;
388 *pi_status = THREAD_END;
390 /* Close input method */
391 p_input->p_Close( p_input );
393 /* Destroy all decoder threads */
395 (i_es_loop < INPUT_MAX_ES) && (p_input->pp_selected_es[i_es_loop] != NULL) ;
398 switch( p_input->pp_selected_es[i_es_loop]->i_type )
403 vdec_DestroyThread( (vdec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
405 vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
410 adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
413 ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
416 /* Special streams for the PSI decoder, PID 0 and 1 */
420 intf_DbgMsg("error: unknown decoder type %d\n", p_input->pp_selected_es[i_es_loop]->i_type );
426 input_NetlistEnd( p_input ); /* clean netlist */
427 input_PsiEnd( p_input ); /* clean PSI information */
428 input_PcrEnd( p_input ); /* clean PCR information */
429 free( p_input ); /* free input_thread structure */
432 *pi_status = THREAD_OVER;
435 /*******************************************************************************
436 * input_ReadPacket: reads a packet from the network or the file
437 *******************************************************************************/
438 static __inline__ int input_ReadPacket( input_thread_t *p_input )
440 int i_base_index; /* index of the first free iovec */
443 #ifdef INPUT_LIFO_TS_NETLIST
444 int i_meanwhile_released;
445 int i_currently_removed;
447 ts_packet_t * p_ts_packet;
449 /* In this function, we only care about the TS netlist. PES netlist
450 * is for the demultiplexer. */
451 #ifdef INPUT_LIFO_TS_NETLIST
452 i_base_index = p_input->netlist.i_ts_index;
454 /* Verify that we still have packets in the TS netlist */
455 if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
457 intf_ErrMsg("input error: TS netlist is empty !\n");
461 #else /* FIFO netlist */
462 i_base_index = p_input->netlist.i_ts_start;
463 if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
465 /* The netlist is splitted in 2 parts. We must gather them to consolidate
466 the FIFO (we make the loop easily in having the same iovec at the far
467 end and in the beginning of netlist_free).
468 That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
470 memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
471 p_input->netlist.p_ts_free,
472 (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
473 * sizeof(struct iovec) );
476 /* Verify that we still have packets in the TS netlist */
477 if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
479 intf_ErrMsg("input error: TS netlist is empty !\n");
482 #endif /* FIFO netlist */
484 /* Scatter read the buffer. */
485 i_packet_size = (*p_input->p_Read)( p_input,
486 &p_input->netlist.p_ts_free[i_base_index],
487 INPUT_TS_READ_ONCE );
488 if( i_packet_size == (-1) )
490 // intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
491 // &p_input->netlist.p_ts_free[i_base_index],
492 // p_input->netlist.i_ts_start,
493 // p_input->netlist.i_ts_end);
494 intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
498 if( i_packet_size == 0 )
500 /* No packet has been received, so stop here. */
504 /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
505 for( i_current_index = i_base_index;
506 (i_packet_size -= TS_PACKET_SIZE) >= 0;
509 /* BTW, something REALLY bad could happen if we receive packets with
511 p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
512 /* Don't cry :-), we are allowed to do that cast, because initially,
513 our buffer was malloc'ed with sizeof(ts_packet_t) */
515 /* Find out if we need this packet and demultiplex. */
516 input_SortPacket( p_input /* for current PIDs and netlist */,
520 if( i_packet_size > 0 )
522 intf_ErrMsg("input error: wrong size\n");
526 /* Remove the TS packets we have just filled from the netlist */
527 #ifdef INPUT_LIFO_TS_NETLIST
528 /* We need to take a lock here while we're calculating index positions. */
529 vlc_mutex_lock( &p_input->netlist.lock );
531 i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
532 if( i_meanwhile_released )
534 /* That's where it becomes funny :-). Since we didn't take locks for
535 efficiency reasons, other threads (including ourselves, with
536 input_DemuxPacket) might have released packets to the netlist.
537 So we have to copy these iovec where they should go.
539 BTW, that explains why the TS netlist is
540 (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */
542 i_currently_removed = i_current_index - i_base_index;
543 if( i_meanwhile_released < i_currently_removed )
545 /* Copy all iovecs in that case */
546 memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
547 + i_currently_removed,
548 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
549 i_meanwhile_released * sizeof(struct iovec) );
553 /* We have fewer places than items, so we only move
554 i_currently_removed of them. */
555 memcpy( &p_input->netlist.p_ts_free[i_base_index],
556 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
557 i_currently_removed * sizeof(struct iovec) );
560 /* Update i_netlist_index with the information gathered above. */
561 p_input->netlist.i_ts_index += i_currently_removed;
565 /* Nothing happened. */
566 p_input->netlist.i_ts_index = i_current_index;
569 vlc_mutex_unlock( &p_input->netlist.lock );
571 #else /* FIFO netlist */
572 /* & is modulo ; that's where we make the loop. */
573 p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
577 p_input->c_packets_read += i_current_index - i_base_index;
578 p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
583 /*******************************************************************************
584 * input_SortPacket: find out whether we need that packet
585 *******************************************************************************/
586 static __inline__ void input_SortPacket( input_thread_t *p_input,
587 ts_packet_t *p_ts_packet )
592 /* Verify that sync_byte, error_indicator and scrambling_control are
594 if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
595 (p_ts_packet->buffer[3] & 0xc0) )
597 intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
601 /* Get the PID of the packet. Note that ntohs is needed, for endianness
602 purposes (see man page). */
603 i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;
605 // intf_DbgMsg("input debug: pid %d received (%p)\n",
606 // i_current_pid, p_ts_packet);
608 /* Lock current ES state. */
609 vlc_mutex_lock( &p_input->es_lock );
611 /* Verify that we actually want this PID. */
612 for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
614 if( p_input->pp_selected_es[i_es_loop] != NULL)
616 if( (*p_input->pp_selected_es[i_es_loop]).i_id
619 /* Don't need the lock anymore, since the value pointed
620 out by p_input->pp_selected_es[i_es_loop] can only be
621 modified from inside the input_thread (by the PSI
622 decoder): interface thread is only allowed to modify
623 the pp_selected_es table */
624 vlc_mutex_unlock( &p_input->es_lock );
626 /* We're interested. Pass it to the demultiplexer. */
627 input_DemuxTS( p_input, p_ts_packet,
628 p_input->pp_selected_es[i_es_loop] );
634 /* pp_selected_es should not contain any hole. */
638 vlc_mutex_unlock( &p_input->es_lock );
641 /* We weren't interested in receiving this packet. Give it back to the
643 // intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
644 // U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
645 input_NetlistFreeTS( p_input, p_ts_packet );
647 p_input->c_packets_trashed++;
651 /*******************************************************************************
652 * input_DemuxTS: first step of demultiplexing: the TS header
653 *******************************************************************************
654 * Stream must also only contain PES and PSI, so PID must have been filtered
655 *******************************************************************************/
656 static __inline__ void input_DemuxTS( input_thread_t *p_input,
657 ts_packet_t *p_ts_packet,
658 es_descriptor_t *p_es_descriptor )
661 boolean_t b_adaption; /* Adaption field is present */
662 boolean_t b_payload; /* Packet carries payload */
663 boolean_t b_unit_start; /* A PSI or a PES start in the packet */
664 boolean_t b_trash = 0; /* Must the packet be trashed ? */
665 boolean_t b_lost = 0; /* Was there a packet lost ? */
669 ASSERT(p_es_descriptor);
671 #define p (p_ts_packet->buffer)
673 // intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
674 // p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
677 p_es_descriptor->c_packets++;
678 p_es_descriptor->c_bytes += TS_PACKET_SIZE;
681 /* Extract flags values from TS common header. */
682 b_unit_start = (p[1] & 0x40);
683 b_adaption = (p[3] & 0x20);
684 b_payload = (p[3] & 0x10);
686 /* Extract adaption field informations if any */
689 /* We don't have any adaptation_field, so payload start immediately
690 after the 4 byte TS header */
691 p_ts_packet->i_payload_start = 4;
695 /* p[4] is adaptation_field_length minus one */
696 p_ts_packet->i_payload_start = 5 + p[4];
698 /* The adaption field can be limited to the adaptation_field_length byte,
699 so that there is nothing to do: skip this possibility */
702 /* If the packet has both adaptation_field and payload, adaptation_field
703 cannot be more than 182 bytes long; if there is only an
704 adaptation_field, it must fill the next 183 bytes. */
705 if( b_payload ? (p[4] > 182) : (p[4] != 183) )
707 intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
710 p_es_descriptor->c_invalid_packets++;
715 /* No we are sure that the byte containing flags is present: read it */
718 /* discontinuity_indicator */
721 intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
722 "(position read: %d, saved: %d)\n", p[5] & 0x80,
723 p_es_descriptor->i_continuity_counter);
725 /* If the PID carries the PCR, there will be a system time-base
726 discontinuity. We let the PCR decoder handle that. */
727 p_es_descriptor->b_discontinuity = 1;
729 /* There also may be a continuity_counter discontinuity:
730 resynchronise our counter with the one of the stream */
731 p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
734 /* random_access_indicator */
735 p_es_descriptor->b_random |= p[5] & 0x40;
737 /* If this is a PCR_PID, and this TS packet contains a PCR,
738 we pass it along to the PCR decoder. */
739 if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
741 /* There should be a PCR field in the packet, check if the
742 adaption field is long enough to carry it */
745 /* Call the PCR decoder */
746 input_PcrDecode( p_input, p_es_descriptor, &p[6] );
753 /* Check the continuity of the stream. */
754 i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
757 /* Everything is ok, just increase our counter */
758 p_es_descriptor->i_continuity_counter++;
762 if( !b_payload && i_dummy == 0 )
764 /* This is a packet without payload, this is allowed by the draft
765 As there is nothing interessant in this packet (except PCR that
766 have already been handled), we can trash the packet. */
767 intf_DbgMsg("Packet without payload received by TS demux\n");
770 else if( i_dummy <= 0 )
772 /* Duplicate packet: mark it as being to be trashed. */
773 intf_DbgMsg("Duplicate packet received by TS demux\n");
776 else if( p_es_descriptor->i_continuity_counter == 0xFF )
778 /* This means that the packet is the first one we receive for this
779 ES since the continuity counter ranges between 0 and 0x0F
780 excepts when it has been initialized by the input: Init the
781 counter to the correct value. */
782 intf_DbgMsg("First packet for PID %d received by TS demux\n",
783 p_es_descriptor->i_id);
784 p_es_descriptor->i_continuity_counter = (p[3] & 0x0f);
788 /* This can indicate that we missed a packet or that the
789 continuity_counter wrapped and we received a dup packet: as we
790 don't know, do as if we missed a packet to be sure to recover
791 from this situation */
792 intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
793 p_es_descriptor->i_continuity_counter & 0x0f,
796 p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
800 /* Trash the packet if it has no payload or if it is bad */
803 input_NetlistFreeTS( p_input, p_ts_packet );
805 p_input->c_packets_trashed++;
810 if( p_es_descriptor->b_psi )
812 /* The payload contains PSI tables */
813 input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
814 b_unit_start, b_lost );
818 /* The payload carries a PES stream */
819 input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
820 b_unit_start, b_lost );
830 /*******************************************************************************
832 *******************************************************************************
833 * Gather a PES packet and analyzes its header.
834 *******************************************************************************/
835 static __inline__ void input_DemuxPES( input_thread_t *p_input,
836 ts_packet_t *p_ts_packet,
837 es_descriptor_t *p_es_descriptor,
838 boolean_t b_unit_start,
839 boolean_t b_packet_lost )
841 decoder_fifo_t * p_fifo;
842 u8 i_pes_header_size;
844 pes_packet_t* p_last_pes;
846 int i_ts_payload_size;
849 #define p_pes (p_es_descriptor->p_pes_packet)
853 ASSERT(p_es_descriptor);
855 // intf_DbgMsg("PES-demultiplexing %p (%p)\n", p_ts_packet, p_pes);
857 /* If we lost data, discard the PES packet we are trying to reassemble
858 if any and wait for the beginning of a new one in order to synchronise
860 if( b_packet_lost && p_pes != NULL )
862 intf_DbgMsg("PES %p trashed because of packet lost\n", p_pes);
863 input_NetlistFreePES( p_input, p_pes );
867 /* If the TS packet contains the begining of a new PES packet, and if we
868 were reassembling a PES packet, then the PES should be complete now,
869 so parse its header and give it to the decoders */
870 if( b_unit_start && p_pes != NULL )
872 // intf_DbgMsg("End of PES packet %p\n", p_pes);
874 /* Parse the header. The header has a variable length, but in order
875 to improve the algorithm, we will read the 14 bytes we may be
877 p_ts = p_pes->p_first_ts;
878 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
881 if(i_ts_payload_size >= PES_HEADER_SIZE)
883 /* This part of the header entirely fits in the payload of
884 the first TS packet */
885 p_pes->p_pes_header = &(p_ts->buffer[p_ts->i_payload_start]);
889 /* This part of the header does not fit in the current TS packet:
890 copy the part of the header we are interested in to the
891 p_pes_header_save buffer. The buffer is dynamicly allocated if
892 needed so it's time expensive but this situation almost never
894 intf_DbgMsg("Code never tested encountered, WARNING ! (benny)\n");
895 if( !p_pes->p_pes_header_save )
896 p_pes->p_pes_header_save = malloc(PES_HEADER_SIZE);
900 memcpy(p_pes->p_pes_header_save + i_dummy,
901 &p_ts->buffer[p_ts->i_payload_start], i_ts_payload_size);
902 i_dummy += i_ts_payload_size;
904 p_ts = p_ts->p_next_ts;
907 /* The payload of the PES packet is shorter than the 14 bytes
908 we would read. This means that high packet lost occured
909 so the PES won't be usefull for any decoder. Moreover,
910 this should never happen so we can trash the packet and
911 exit roughly without regrets */
912 intf_DbgMsg("PES packet too short: trashed\n");
913 input_NetlistFreePES( p_input, p_pes );
919 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
921 while(i_ts_payload_size + i_dummy < PES_HEADER_SIZE);
923 /* This last TS packet is partly header, partly payload, so just
924 copy the header part */
925 memcpy(p_pes->p_pes_header_save + i_dummy,
926 &p_ts->buffer[p_ts->i_payload_start],
927 PES_HEADER_SIZE - i_dummy);
929 /* The header must be read in the buffer not in any TS packet */
930 p_pes->p_pes_header = p_pes->p_pes_header_save;
933 /* Now we have the part of the PES header we were interested in:
936 /* First read the 6 header bytes common to all PES packets:
937 use them to test the PES validity */
938 if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
939 (p_pes->p_pes_header[2] != 1)) ||
940 /* packet_start_code_prefix != 0x000001 */
941 ((i_dummy = U16_AT(p_pes->p_pes_header + 4)) &&
942 (i_dummy + 6 != p_pes->i_pes_size)) )
943 /* PES_packet_length is set and != total received payload */
945 /* Trash the packet and set p_pes to NULL to be sure the next PES
946 packet will have its b_data_lost flag set */
947 intf_DbgMsg("Corrupted PES packet received: trashed\n");
948 input_NetlistFreePES( p_input, p_pes );
954 /* The PES packet is valid. Check its type to test if it may
955 carry additional informations in a header extension */
956 p_pes->i_stream_id = p_pes->p_pes_header[3];
958 switch( p_pes->i_stream_id )
960 case 0xBE: /* Padding */
961 case 0xBC: /* Program stream map */
962 case 0xBF: /* Private stream 2 */
965 case 0xFF: /* Program stream directory */
966 case 0xF2: /* DSMCC stream */
967 case 0xF8: /* ITU-T H.222.1 type E stream */
968 /* The payload begins immediatly after the 6 bytes header, so
969 we have finished with the parsing */
970 i_pes_header_size = 6;
974 /* The PES header contains at least 3 more bytes: parse them */
975 p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x04;
976 p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x80;
977 i_pes_header_size = p_pes->p_pes_header[8] + 9;
979 /* Now parse the optional header extensions (in the limit of
981 if( p_pes->b_has_pts )
983 pcr_descriptor_t * p_pcr;
985 p_pcr = p_input->p_pcr;
988 ( ((mtime_t)(p_pes->p_pes_header[9] & 0x0E) << 29) |
989 (((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) - (1 << 14)) |
990 ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) ) * 300;
993 if( p_pcr->i_synchro_state )
995 switch( p_pcr->i_synchro_state )
997 case SYNCHRO_NOT_STARTED:
998 p_pes->b_has_pts = 0;
1002 p_pes->i_pts += p_pcr->delta_pcr;
1003 p_pcr->delta_absolute = mdate() - p_pes->i_pts + 500000;
1004 p_pes->i_pts += p_pcr->delta_absolute;
1005 p_pcr->i_synchro_state = 0;
1008 case SYNCHRO_REINIT: /* We skip a PES */
1009 p_pes->b_has_pts = 0;
1010 p_pcr->i_synchro_state = SYNCHRO_START;
1016 p_pes->i_pts += p_pcr->delta_pcr + p_pcr->delta_absolute;
1022 /* Now we've parsed the header, we just have to indicate in some
1023 specific TS packets where the PES payload begins (renumber
1024 i_payload_start), so that the decoders can find the beginning
1025 of their data right out of the box. */
1026 p_ts = p_pes->p_first_ts;
1027 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
1028 while( i_pes_header_size > i_ts_payload_size )
1030 /* These packets are entirely filled by the PES header. */
1031 i_pes_header_size -= i_ts_payload_size;
1032 p_ts->i_payload_start = p_ts->i_payload_end;
1033 /* Go to the next TS packet: here we won't have to test it is
1034 not NULL because we trash the PES packets when packet lost
1036 p_ts = p_ts->p_next_ts;
1037 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
1039 /* This last packet is partly header, partly payload. */
1040 p_ts->i_payload_start += i_pes_header_size;
1043 /* Now we can eventually put the PES packet in the decoder's
1045 switch( p_es_descriptor->i_type )
1047 case MPEG1_VIDEO_ES:
1048 case MPEG2_VIDEO_ES:
1050 p_fifo = &(((vdec_thread_t*)(p_es_descriptor->p_dec))->fifo);
1052 p_fifo = &(((vpar_thread_t*)(p_es_descriptor->p_dec))->fifo);
1056 case MPEG1_AUDIO_ES:
1057 case MPEG2_AUDIO_ES:
1058 p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
1062 /* we skip 4 bytes at the beginning of the AC3 payload */
1063 p_ts->i_payload_start += 4;
1064 p_fifo = &(((ac3dec_thread_t *)(p_es_descriptor->p_dec))->fifo);
1068 /* This should never happen */
1069 intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
1070 p_es_descriptor->i_id, p_es_descriptor->i_type);
1075 if( p_fifo != NULL )
1077 vlc_mutex_lock( &p_fifo->data_lock );
1078 if( DECODER_FIFO_ISFULL( *p_fifo ) )
1080 /* The FIFO is full !!! This should not happen. */
1082 p_input->c_packets_trashed += p_pes->i_ts_packets;
1083 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
1085 input_NetlistFreePES( p_input, p_pes );
1086 intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
1087 p_es_descriptor->i_id, p_es_descriptor->i_type);
1091 // intf_DbgMsg("Putting %p into fifo %p/%d\n",
1092 // p_pes, p_fifo, p_fifo->i_end);
1093 p_fifo->buffer[p_fifo->i_end] = p_pes;
1094 DECODER_FIFO_INCEND( *p_fifo );
1096 /* Warn the decoder that it's got work to do. */
1097 vlc_cond_signal( &p_fifo->data_wait );
1099 vlc_mutex_unlock( &p_fifo->data_lock );
1103 intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
1105 p_input->c_packets_trashed += p_pes->i_ts_packets;
1106 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
1108 input_NetlistFreePES( p_input, p_pes );
1114 /* If we are at the beginning of a new PES packet, we must fetch a new
1115 PES buffer to begin with the reassembly of this PES packet. This is
1116 also here that we can synchronise with the stream if we we lost
1117 packets or if the decoder has just started */
1122 /* Get a new one PES from the PES netlist. */
1123 if( (p_pes = input_NetlistGetPES( p_input )) == (NULL) )
1125 /* PES netlist is empty ! */
1126 p_input->b_error = 1;
1130 // intf_DbgMsg("New PES packet %p (first TS: %p)\n", p_pes, p_ts_packet);
1132 /* Init the PES fields so that the first TS packet could be correctly
1133 added to the PES packet (see below) */
1134 p_pes->p_first_ts = p_ts_packet;
1135 p_pes->p_last_ts = NULL;
1137 /* If the last pes packet was null, this means that the synchronisation
1138 was lost and so warn the decoder that he will have to find a way to
1141 p_pes->b_data_loss = 1;
1143 /* Read the b_random_access flag status and then reinit it */
1144 p_pes->b_random_access = p_es_descriptor->b_random;
1145 p_es_descriptor->b_random = 0;
1150 /* If we are synchronised with the stream, and so if we are ready to
1151 receive correctly the data, add the TS packet to the current PES
1155 // intf_DbgMsg("Adding TS %p to PES %p\n", p_ts_packet, p_pes);
1157 /* Size of the payload carried in the TS packet */
1158 i_ts_payload_size = p_ts_packet->i_payload_end -
1159 p_ts_packet->i_payload_start;
1161 /* Update the relations between the TS packets */
1162 p_ts_packet->p_prev_ts = p_pes->p_last_ts;
1163 p_ts_packet->p_next_ts = NULL;
1164 if( p_pes->i_ts_packets != 0 )
1166 /* Regarder si il serait pas plus efficace de ne creer que les liens
1167 precedent->suivant pour le moment, et les liens suivant->precedent
1168 quand le paquet est termine */
1169 /* Otherwise it is the first TS packet. */
1170 p_pes->p_last_ts->p_next_ts = p_ts_packet;
1172 /* Now add the TS to the PES packet */
1173 p_pes->p_last_ts = p_ts_packet;
1174 p_pes->i_ts_packets++;
1175 p_pes->i_pes_size += i_ts_payload_size;
1179 i_dummy = p_ts_packet->i_payload_end - p_ts_packet->i_payload_start;
1180 p_es_descriptor->c_payload_bytes += i_dummy;
1185 /* Since we don't use the TS packet to build a PES packet, we don't
1186 need it anymore, so give it back to the netlist */
1187 // intf_DbgMsg("Trashing TS %p: no PES being build\n", p_ts_packet);
1188 input_NetlistFreeTS( p_input, p_ts_packet );
1197 /*******************************************************************************
1199 *******************************************************************************
1200 * Notice that current ES state has been locked by input_SortPacket. (No more true,
1201 * changed by benny - See if it's ok, and definitely change the code ???????? )
1202 *******************************************************************************/
1203 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
1204 ts_packet_t *p_ts_packet,
1205 es_descriptor_t *p_es_descriptor,
1206 boolean_t b_unit_start, boolean_t b_packet_lost )
1208 int i_data_offset; /* Offset of the interesting data in the TS packet */
1209 u16 i_data_length; /* Length of those data */
1210 //boolean_t b_first_section; /* Was there another section in the TS packet ? */
1213 ASSERT(p_ts_packet);
1214 ASSERT(p_es_descriptor);
1216 #define p_psi (p_es_descriptor->p_psi_section)
1218 // intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
1220 // 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);
1223 /* Try to find the beginning of the payload in the packet to initialise
1224 the do-while loop that follows -> Compute the i_data_offset variable:
1225 by default, the value is set so that we won't enter in the while loop.
1226 It will be set to a correct value if the data are not corrupted */
1227 i_data_offset = TS_PACKET_SIZE;
1229 /* Has the reassembly of a section already began in a previous packet ? */
1230 if( p_psi->b_running_section )
1232 /* Was data lost since the last TS packet ? */
1235 /* Discard the packet and wait for the begining of a new one to resynch */
1236 p_psi->b_running_section = 0;
1237 p_psi->i_current_position = 0;
1238 intf_DbgMsg( "PSI section(s) discarded due to packet loss\n" );
1242 /* The data that complete a previously began section are always at
1243 the beginning of the TS payload... */
1244 i_data_offset = p_ts_packet->i_payload_start;
1245 /* ...Unless there is a pointer field, that we have to bypass */
1248 // intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
1251 /* We are looking for the beginning of a new section */
1256 /* Get the offset at which the data for that section can be found
1257 The offset is stored in the pointer_field since we are interested in
1258 the first section of the TS packet. Note that the +1 is to bypass
1259 the pointer field */
1260 i_data_offset = p_ts_packet->i_payload_start +
1261 p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
1262 // intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
1266 /* This may either mean that the TS is bad or that the packet contains
1267 the end of a section that had been discarded in a previous loop:
1268 trash the TS packet since we cannot do anything with those data: */
1269 p_psi->b_running_section = 0;
1270 p_psi->i_current_position = 0;
1271 intf_DbgMsg( "PSI packet discarded due to lack of synchronisation\n" );
1275 /* The section we will deal with during the first iteration of the following
1276 loop is the first one contained in the TS packet */
1277 // b_first_section = 1;
1279 /* Reassemble the pieces of sections contained in the TS packet and decode
1280 the sections that could have been completed.
1281 Stop when we reach the end of the packet or stuffing bytes */
1282 while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF )
1284 /* If the current section is a new one, reinit the data fields of the p_psi
1285 struct to start its decoding */
1286 if( !p_psi->b_running_section )
1288 /* Read the length of the new section */
1289 p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
1290 // intf_DbgMsg( "Section length %d\n", p_psi->i_length );
1291 if( p_psi->i_length > PSI_SECTION_SIZE )
1293 /* The TS packet is corrupted, stop here to avoid possible a seg fault */
1294 intf_DbgMsg( "PSI Section size is too big, aborting its reception\n" );
1298 /* Init the reassembly of that section */
1299 p_psi->b_running_section = 1;
1300 p_psi->i_current_position = 0;
1303 /* Compute the length of data related to the section in this TS packet */
1304 if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
1305 i_data_length = TS_PACKET_SIZE - i_data_offset;
1307 i_data_length = p_psi->i_length - p_psi->i_current_position;
1309 /* Copy those data in the section buffer */
1310 memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
1313 /* Interesting data are now after the ones we copied, since no gap is
1314 allowed between 2 sections in a TS packets */
1315 i_data_offset += i_data_length;
1317 /* Decode the packet if it is now complete */
1318 if (p_psi->i_length == p_psi->i_current_position + i_data_length)
1320 /* Packet is complete, decode it */
1321 // intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
1322 input_PsiDecode( p_input, p_psi );
1324 /* Prepare the buffer to receive a new section */
1325 p_psi->i_current_position = 0;
1326 p_psi->b_running_section = 0;
1328 /* The new section won't be the first anymore */
1329 //b_first_section = 0;
1333 /* Prepare the buffer to receive the next part of the section */
1334 p_psi->i_current_position += i_data_length;
1335 // intf_DbgMsg( "Section not complete, waiting for the end\n" );
1338 // intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
1339 // i_data_offset, p_ts_packet->buffer[i_data_offset] );
1342 /* Relase the TS packet, we don't need it anymore */
1343 input_NetlistFreeTS( p_input, p_ts_packet );