1 /*******************************************************************************
2 * input.c: input thread
4 *******************************************************************************
5 * Read an MPEG2 stream, demultiplex and parse it before sending it to
7 *******************************************************************************/
9 /*******************************************************************************
11 *******************************************************************************/
14 #include <sys/uio.h> /* iovec */
18 #include <X11/extensions/XShm.h>
19 #include <sys/soundcard.h>
21 #include <stdlib.h> /* atoi(), malloc(), free() */
23 #include <sys/ioctl.h> /* ioctl() */
24 #include <net/if.h> /* ifreq */
25 #include <netinet/in.h>
34 #include "input_psi.h"
35 #include "input_pcr.h"
36 #include "input_netlist.h"
37 #include "decoder_fifo.h"
38 #include "input_file.h"
39 #include "input_network.h"
41 #include "audio_output.h"
42 #include "audio_decoder.h"
45 #include "video_output.h"
46 #include "video_decoder.h"
48 /******************************************************************************
50 ******************************************************************************/
51 static void input_Thread( input_thread_t *p_input );
52 static void EndThread( input_thread_t *p_input );
53 static __inline__ int input_ReadPacket( input_thread_t *p_input );
54 static __inline__ void input_SortPacket( input_thread_t *p_input,
55 ts_packet_t *ts_packet );
56 static __inline__ void input_DemuxTS( input_thread_t *p_input,
57 ts_packet_t *ts_packet,
58 es_descriptor_t *es_descriptor );
59 static __inline__ void input_DemuxPES( input_thread_t *p_input,
60 ts_packet_t *ts_packet,
61 es_descriptor_t *p_es_descriptor,
62 boolean_t b_unit_start, boolean_t b_packet_lost );
63 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
64 ts_packet_t *ts_packet,
65 es_descriptor_t *p_es_descriptor,
66 boolean_t b_unit_start, boolean_t b_packet_lost );
68 /*******************************************************************************
69 * input_CreateThread: initialize and spawn an input thread
70 *******************************************************************************
71 * This function initializes and spawns an input thread. It returns NULL on
72 * failure. If you want a better understanding of the input thread, don't start
73 * by reading this function :-).
74 *******************************************************************************/
75 input_thread_t *input_CreateThread( input_cfg_t *p_cfg )
77 input_thread_t * p_input;
80 intf_DbgMsg("input debug 1-1: creating thread (cfg : %p)\n", p_cfg );
82 /* Allocate input_thread_t structure. */
83 if( !( p_input = (input_thread_t *)malloc(sizeof(input_thread_t)) ) )
85 intf_ErrMsg("input error: can't allocate input thread structure (%s)\n",
90 bzero( p_input, sizeof(input_thread_t));
91 for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
93 p_input->p_es[i_index].i_id = EMPTY_PID;
96 /* Find out which method we are gonna use and retrieve pointers. */
97 if( !((p_cfg->i_properties) & INPUT_CFG_METHOD) )
99 /* i_method is not set. */
100 intf_DbgMsg("input debug: using default method (%d)\n",
101 INPUT_DEFAULT_METHOD);
102 p_cfg->i_method = INPUT_DEFAULT_METHOD;
103 p_cfg->i_properties |= INPUT_CFG_METHOD;
105 p_input->i_method = p_cfg->i_method;
106 switch( p_cfg->i_method )
109 case INPUT_METHOD_TS_FILE:
110 p_input->p_open = &input_FileCreateMethod;
111 p_input->p_read = &input_FileRead;
112 p_input->p_clean = &input_FileDestroyMethod;
115 /* Network methods */
116 case INPUT_METHOD_TS_UCAST:
117 case INPUT_METHOD_TS_MCAST:
118 case INPUT_METHOD_TS_BCAST:
119 case INPUT_METHOD_TS_VLAN_BCAST:
120 p_input->p_open = &input_NetworkCreateMethod;
121 p_input->p_read = &input_NetworkRead;
122 p_input->p_clean = &input_NetworkDestroyMethod;
125 case INPUT_METHOD_NONE:
128 /* Internal error, which should never happen */
129 intf_DbgMsg("input debug: unknow method type %d\n",
136 /* Initialize PSI decoder. */
137 intf_DbgMsg("Initializing PSI decoder\n");
138 if( input_PsiInit( p_input ) == -1 )
144 /* Initialize PCR decoder. */
145 intf_DbgMsg("Initializing PCR decoder\n");
146 if( input_PcrInit( p_input ) == -1 )
148 input_PsiClean( p_input );
153 /* Initialize netlists. */
154 if( input_NetlistOpen( p_input ) )
156 input_PsiClean( p_input );
157 input_PcrClean( p_input );
163 /* Initialize counters. */
164 p_input->c_bytes = 0;
165 p_input->c_payload_bytes = 0;
166 p_input->c_ts_packets_read = 0;
167 p_input->c_ts_packets_trashed = 0;
169 p_input->c_loops = 0;
173 /* Let the appropriate method open the socket. */
174 if( (*(p_input->p_open))( p_input, p_cfg ) == -1 )
176 input_NetlistClean( p_input );
177 input_PsiClean( p_input );
178 input_PcrClean( p_input );
183 intf_DbgMsg("input debug: method %d properly initialized the socket\n",
186 /* Create thread and set locks. */
188 pthread_mutex_init( &p_input->netlist.lock, NULL );
189 pthread_mutex_init( &p_input->programs_lock, NULL );
190 pthread_mutex_init( &p_input->es_lock, NULL );
192 input_Thread( p_input );
194 if( pthread_create(&p_input->thread_id, NULL, (void *) input_Thread,
197 intf_ErrMsg("input error: can't spawn input thread (%s)\n",
199 (*p_input->p_clean)( p_input );
200 input_NetlistClean( p_input );;
201 input_PsiClean( p_input );
202 input_PcrClean( p_input );
208 /* Default setting for new decoders */
209 p_input->p_aout = p_cfg->p_aout;
214 /******************************************************************************
215 * input_DestroyThread: mark an input thread as zombie
216 ******************************************************************************
217 * This function should not return until the thread is effectively cancelled.
218 ******************************************************************************/
219 void input_DestroyThread( input_thread_t *p_input )
221 intf_DbgMsg("input debug: requesting termination of input thread\n");
222 p_input->b_die = 1; /* ask thread to kill itself */
224 /* Remove this as soon as the "status" flag is implemented */
225 pthread_join( p_input->thread_id, NULL ); /* wait until it's done */
229 /*******************************************************************************
230 * input_OpenAudioStream: open an audio stream
231 *******************************************************************************
232 * This function spawns an audio decoder and plugs it on the audio output
234 *******************************************************************************/
235 int input_OpenAudioStream( input_thread_t *p_input, int i_id )
240 /*******************************************************************************
241 * input_CloseAudioStream: close an audio stream
242 *******************************************************************************
243 * This function destroys an audio decoder.
244 *******************************************************************************/
245 void input_CloseAudioStream( input_thread_t *p_input, int i_id )
250 /*******************************************************************************
251 * input_OpenVideoStream: open a video stream
252 *******************************************************************************
253 * This function spawns a video decoder and plugs it on a video output thread.
254 *******************************************************************************/
255 int input_OpenVideoStream( input_thread_t *p_input,
256 struct vout_thread_s *p_vout, struct video_cfg_s * p_cfg )
261 /*******************************************************************************
262 * input_CloseVideoStream: close a video stream
263 *******************************************************************************
264 * This function destroys an video decoder.
265 *******************************************************************************/
266 void input_CloseVideoStream( input_thread_t *p_input, int i_id )
272 /* following functions are local */
274 /*******************************************************************************
275 * input_Thread: input thread
276 *******************************************************************************
277 * Thread in charge of processing the network packets and demultiplexing.
278 *******************************************************************************/
279 static void input_Thread( input_thread_t *p_input )
281 intf_DbgMsg("input debug 11-1: thread %p is active\n", p_input);
282 while( !p_input->b_die )
284 /* Scatter read the UDP packet from the network or the file. */
285 if( (input_ReadPacket( p_input )) == (-1) )
287 /* ??? Normally, a thread can't kill itself, but we don't have
288 * any method in case of an error condition ... */
297 /* Ohoh, we have to die as soon as possible. */
298 EndThread( p_input );
300 intf_DbgMsg("input debug: thread %p destroyed\n", p_input);
304 /*******************************************************************************
305 * EndThread: end the input thread
306 *******************************************************************************/
307 static void EndThread( input_thread_t *p_input )
311 (*p_input->p_clean)( p_input ); /* close input method */
313 /* Destroy all decoder threads. */
314 for( i_es_loop = 0; i_es_loop < INPUT_MAX_ES; i_es_loop++ )
316 if( p_input->pp_selected_es[i_es_loop] )
318 switch( p_input->pp_selected_es[i_es_loop]->i_type )
322 vdec_DestroyThread( (vdec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
326 adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
330 /* This should never happen. */
331 intf_DbgMsg("input debug: unknown stream type ! (%d, %d)\n",
332 p_input->pp_selected_es[i_es_loop]->i_id,
333 p_input->pp_selected_es[i_es_loop]->i_type);
340 /* pp_selected_es should not contain any hole. */
345 input_NetlistClean( p_input ); /* clean netlist */
346 input_PsiClean( p_input ); /* clean PSI information */
347 input_PcrClean( p_input ); /* clean PCR information */
348 free( p_input ); /* free input_thread structure */
350 intf_DbgMsg("input debug: EndThread(%p)\n", p_input);
353 /*******************************************************************************
354 * input_ReadPacket: reads a packet from the network or the file
355 *******************************************************************************/
356 static __inline__ int input_ReadPacket( input_thread_t *p_input )
358 int i_base_index; /* index of the first free iovec */
361 #ifdef INPUT_LIFO_TS_NETLIST
362 int i_meanwhile_released;
363 int i_currently_removed;
365 ts_packet_t * p_ts_packet;
367 /* In this function, we only care about the TS netlist. PES netlist
368 * is for the demultiplexer. */
369 #ifdef INPUT_LIFO_TS_NETLIST
370 i_base_index = p_input->netlist.i_ts_index;
372 /* Verify that we still have packets in the TS netlist */
373 if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
375 intf_ErrMsg("input error: TS netlist is empty !\n");
379 #else /* FIFO netlist */
380 i_base_index = p_input->netlist.i_ts_start;
381 if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
383 /* The netlist is splitted in 2 parts. We must gather them to consolidate
384 the FIFO (we make the loop easily in having the same iovec at the far
385 end and in the beginning of netlist_free).
386 That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
388 memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
389 p_input->netlist.p_ts_free,
390 (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
391 * sizeof(struct iovec) );
394 /* Verify that we still have packets in the TS netlist */
395 if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
397 intf_ErrMsg("input error: TS netlist is empty !\n");
400 #endif /* FIFO netlist */
402 /* Scatter read the buffer. */
403 i_packet_size = (*p_input->p_read)( p_input,
404 &p_input->netlist.p_ts_free[i_base_index],
405 INPUT_TS_READ_ONCE );
406 if( i_packet_size == (-1) )
408 // intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
409 // &p_input->netlist.p_ts_free[i_base_index],
410 // p_input->netlist.i_ts_start,
411 // p_input->netlist.i_ts_end);
412 intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
416 if( i_packet_size == 0 )
418 /* No packet has been received, so stop here. */
422 /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
423 for( i_current_index = i_base_index;
424 (i_packet_size -= TS_PACKET_SIZE) >= 0;
427 /* BTW, something REALLY bad could happen if we receive packets with
429 p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
430 /* Don't cry :-), we are allowed to do that cast, because initially,
431 our buffer was malloc'ed with sizeof(ts_packet_t) */
433 /* Find out if we need this packet and demultiplex. */
434 input_SortPacket( p_input /* for current PIDs and netlist */,
438 if( i_packet_size > 0 )
440 intf_ErrMsg("input error: wrong size\n");
444 /* Remove the TS packets we have just filled from the netlist */
445 #ifdef INPUT_LIFO_TS_NETLIST
446 /* We need to take a lock here while we're calculating index positions. */
447 pthread_mutex_lock( &p_input->netlist.lock );
449 i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
450 if( i_meanwhile_released )
452 /* That's where it becomes funny :-). Since we didn't take locks for
453 efficiency reasons, other threads (including ourselves, with
454 input_DemuxPacket) might have released packets to the netlist.
455 So we have to copy these iovec where they should go.
457 BTW, that explains why the TS netlist is
458 (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */
460 i_currently_removed = i_current_index - i_base_index;
461 if( i_meanwhile_released < i_currently_removed )
463 /* Copy all iovecs in that case */
464 memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
465 + i_currently_removed,
466 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
467 i_meanwhile_released * sizeof(struct iovec) );
471 /* We have fewer places than items, so we only move
472 i_currently_removed of them. */
473 memcpy( &p_input->netlist.p_ts_free[i_base_index],
474 &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
475 i_currently_removed * sizeof(struct iovec) );
478 /* Update i_netlist_index with the information gathered above. */
479 p_input->netlist.i_ts_index += i_currently_removed;
483 /* Nothing happened. */
484 p_input->netlist.i_ts_index = i_current_index;
487 pthread_mutex_unlock( &p_input->netlist.lock );
489 #else /* FIFO netlist */
490 /* & is modulo ; that's where we make the loop. */
491 p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
495 p_input->c_ts_packets_read += i_current_index - i_base_index;
496 p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
501 /*******************************************************************************
502 * input_SortPacket: find out whether we need that packet
503 *******************************************************************************/
504 static __inline__ void input_SortPacket( input_thread_t *p_input,
505 ts_packet_t *p_ts_packet )
510 /* Verify that sync_byte, error_indicator and scrambling_control are
512 if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
513 (p_ts_packet->buffer[3] & 0xc0) )
515 intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
519 /* Get the PID of the packet. Note that ntohs is needed, for endianness
520 purposes (see man page). */
521 i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;
523 // intf_DbgMsg("input debug: pid %d received (%p)\n",
524 // i_current_pid, p_ts_packet);
526 /* Lock current ES state. */
527 pthread_mutex_lock( &p_input->es_lock );
529 /* Verify that we actually want this PID. */
530 for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
532 if( p_input->pp_selected_es[i_es_loop] != NULL)
534 if( (*p_input->pp_selected_es[i_es_loop]).i_id
537 /* Don't need the lock anymore, since the value pointed
538 out by p_input->pp_selected_es[i_es_loop] can only be
539 modified from inside the input_thread (by the PSI
540 decoder): interface thread is only allowed to modify
541 the pp_selected_es table */
542 pthread_mutex_unlock( &p_input->es_lock );
544 /* We're interested. Pass it to the demultiplexer. */
545 input_DemuxTS( p_input, p_ts_packet,
546 p_input->pp_selected_es[i_es_loop] );
552 /* pp_selected_es should not contain any hole. */
556 pthread_mutex_unlock( &p_input->es_lock );
559 /* We weren't interested in receiving this packet. Give it back to the
561 // intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
562 // U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
563 input_NetlistFreeTS( p_input, p_ts_packet );
565 p_input->c_ts_packets_trashed++;
569 /*******************************************************************************
570 * input_DemuxTS: first step of demultiplexing: the TS header
571 *******************************************************************************
572 * Stream must also only contain PES and PSI, so PID must have been filtered
573 *******************************************************************************/
574 static __inline__ void input_DemuxTS( input_thread_t *p_input,
575 ts_packet_t *p_ts_packet,
576 es_descriptor_t *p_es_descriptor )
579 boolean_t b_adaption; /* Adaption field is present */
580 boolean_t b_payload; /* Packet carries payload */
581 boolean_t b_unit_start; /* A PSI or a PES start in the packet */
582 boolean_t b_trash = 0; /* Must the packet be trashed ? */
583 boolean_t b_lost = 0; /* Was there a packet lost ? */
587 ASSERT(p_es_descriptor);
589 #define p (p_ts_packet->buffer)
591 // intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
592 // p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
595 p_es_descriptor->c_packets++;
596 p_es_descriptor->c_bytes += TS_PACKET_SIZE;
599 /* Extract flags values from TS common header. */
600 b_unit_start = (p[1] & 0x40);
601 b_adaption = (p[3] & 0x20);
602 b_payload = (p[3] & 0x10);
604 /* Extract adaption field informations if any */
607 /* We don't have any adaptation_field, so payload start immediately
608 after the 4 byte TS header */
609 p_ts_packet->i_payload_start = 4;
613 /* p[4] is adaptation_field_length minus one */
614 p_ts_packet->i_payload_start = 5 + p[4];
616 /* The adaption field can be limited to the adaptation_field_length byte,
617 so that there is nothing to do: skip this possibility */
620 /* If the packet has both adaptation_field and payload, adaptation_field
621 cannot be more than 182 bytes long; if there is only an adaptation_field,
622 it must fill the next 183 bytes. */
623 if( b_payload ? (p[4] > 182) : (p[4] != 183) )
625 intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
628 p_es_descriptor->c_invalid_packets++;
633 /* No we are sure that the byte containing flags is present: read it */
636 /* discontinuity_indicator */
639 intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
640 "(position read: %d, saved: %d)\n", p[5] & 0x80,
641 p_es_descriptor->i_continuity_counter);
643 /* If the PID carries the PCR, there will be a system time-base
644 discontinuity. We let the PCR decoder handle that. */
645 p_es_descriptor->b_discontinuity = 1;
647 /* There also may be a continuity_counter discontinuity: resynchronise
648 our counter with the one of the stream */
649 p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
652 /* random_access_indicator */
653 p_es_descriptor->b_random |= p[5] & 0x40;
655 /* If this is a PCR_PID, and this TS packet contains a PCR, we pass it
656 along to the PCR decoder. */
657 if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
659 /* There should be a PCR field in the packet, check if the adaption
660 field is long enough to carry it */
663 /* Call the PCR decoder */
664 input_PcrDecode( p_input, p_es_descriptor, &p[6] );
671 /* Check the continuity of the stream. */
672 i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
675 /* Everything is ok, just increase our counter */
676 p_es_descriptor->i_continuity_counter++;
680 if( !b_payload && i_dummy == 0 )
682 /* This is a packet without payload, this is allowed by the draft
683 As there is nothing interessant in this packet (except PCR that
684 have already been handled), we can trash the packet. */
685 intf_DbgMsg("Packet without payload received by TS demux\n");
688 else if( i_dummy <= 0 )
690 /* Duplicate packet: mark it as being to be trashed. */
691 intf_DbgMsg("Duplicate packet received by TS demux\n");
696 /* This can indicate that we missed a packet or that the
697 continuity_counter wrapped and we received a dup packet: as we
698 don't know, do as if we missed a packet to be sure to recover
699 from this situation */
700 intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
701 p_es_descriptor->i_continuity_counter & 0x0f,
704 p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
708 /* Trash the packet if it has no payload or if it is bad */
711 input_NetlistFreeTS( p_input, p_ts_packet );
713 p_input->c_ts_packets_trashed++;
718 if( p_es_descriptor->b_psi )
720 /* The payload contains PSI tables */
721 input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
722 b_unit_start, b_lost );
726 /* The payload carries a PES stream */
727 input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
728 b_unit_start, b_lost );
738 /*******************************************************************************
740 *******************************************************************************
741 * Gather a PES packet and analyzes its header.
742 *******************************************************************************/
743 static __inline__ void input_DemuxPES( input_thread_t *p_input,
744 ts_packet_t *p_ts_packet,
745 es_descriptor_t *p_es_descriptor,
746 boolean_t b_unit_start,
747 boolean_t b_packet_lost )
749 decoder_fifo_t * p_fifo;
750 u8 i_pes_header_size;
752 pes_packet_t* p_last_pes;
754 int i_ts_payload_size;
757 #define p_pes (p_es_descriptor->p_pes_packet)
761 ASSERT(p_es_descriptor);
763 // intf_DbgMsg("PES-demultiplexing %p (%p)\n", p_ts_packet, p_pes);
765 /* If we lost data, discard the PES packet we are trying to reassemble
766 if any and wait for the beginning of a new one in order to synchronise
768 if( b_packet_lost && p_pes != NULL )
770 intf_DbgMsg("PES %p trashed because of packet lost\n", p_pes);
771 input_NetlistFreePES( p_input, p_pes );
775 /* If the TS packet contains the begining of a new PES packet, and if we
776 were reassembling a PES packet, then the PES should be complete now,
777 so parse its header and give it to the decoders */
778 if( b_unit_start && p_pes != NULL )
780 // intf_DbgMsg("End of PES packet %p\n", p_pes);
782 /* Parse the header. The header has a variable length, but in order
783 to improve the algorithm, we will read the 14 bytes we may be
785 p_ts = p_pes->p_first_ts;
786 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
789 if(i_ts_payload_size >= PES_HEADER_SIZE)
791 /* This part of the header entirely fits in the payload of
792 the first TS packet */
793 p_pes->p_pes_header = &(p_ts->buffer[p_ts->i_payload_start]);
797 /* This part of the header does not fit in the current TS packet:
798 copy the part of the header we are interested in to the
799 p_pes_header_save buffer */
800 intf_DbgMsg("Code never tested encourtered, WARNING ! (benny)\n");
803 memcpy(p_pes->p_pes_header_save + i_dummy,
804 &p_ts->buffer[p_ts->i_payload_start], i_ts_payload_size);
805 i_dummy += i_ts_payload_size;
807 p_ts = p_ts->p_next_ts;
810 /* The payload of the PES packet is shorter than the 14 bytes
811 we would read. This means that high packet lost occured
812 so the PES won't be usefull for any decoder. Moreover,
813 this should never happen so we can trash the packet and
814 exit roughly without regrets */
815 intf_DbgMsg("PES packet too short: trashed\n");
816 input_NetlistFreePES( p_input, p_pes );
822 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
824 while(i_ts_payload_size + i_dummy < PES_HEADER_SIZE);
826 /* This last TS packet is partly header, partly payload, so just
827 copy the header part */
828 memcpy(p_pes->p_pes_header_save + i_dummy,
829 &p_ts->buffer[p_ts->i_payload_start],
830 PES_HEADER_SIZE - i_dummy);
832 /* The header must be read in the buffer not in any TS packet */
833 p_pes->p_pes_header = p_pes->p_pes_header_save;
836 /* Now we have the part of the PES header we were interested in:
839 /* First read the 6 header bytes common to all PES packets:
840 use them to test the PES validity */
841 if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
842 (p_pes->p_pes_header[2] != 1)) ||
843 /* packet_start_code_prefix != 0x000001 */
844 ((i_dummy = U16_AT(p_pes->p_pes_header + 4)) &&
845 (i_dummy + 6 != p_pes->i_pes_size)) )
846 /* PES_packet_length is set and != total received payload */
848 /* Trash the packet and set p_pes to NULL to be sure the next PES
849 packet will have its b_data_lost flag set */
850 intf_DbgMsg("Corrupted PES packet received: trashed\n");
851 input_NetlistFreePES( p_input, p_pes );
857 /* The PES packet is valid. Check its type to test if it may
858 carry additional informations in a header extension */
859 p_pes->i_stream_id = p_pes->p_pes_header[3];
861 switch( p_pes->i_stream_id )
863 case 0xBE: /* Padding */
864 case 0xBC: /* Program stream map */
865 case 0xBF: /* Private stream 2 */
868 case 0xFF: /* Program stream directory */
869 case 0xF2: /* DSMCC stream */
870 case 0xF8: /* ITU-T H.222.1 type E stream */
871 /* The payload begins immediatly after the 6 bytes header, so
872 we have finished with the parsing */
873 i_pes_header_size = 6;
877 /* The PES header contains at least 3 more bytes: parse them */
878 p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x10;
879 p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x4;
880 i_pes_header_size = 9 + p_pes->p_pes_header[8];
882 /* Now parse the optional header extensions (in the limit of
884 if( p_pes->b_has_pts )
886 pcr_descriptor_t *p_pcr;
887 /* The PTS field is split in 3 bit records. We have to add
888 them, and thereafter we substract the 2 marker_bits */
890 p_pcr = p_input->p_pcr;
891 pthread_mutex_lock( &p_pcr->lock );
892 if( p_pcr->delta_clock == 0 )
898 p_pes->i_pts = ( ((mtime_t)p_pes->p_pes_header[9] << 29) +
899 ((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) +
900 ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) -
901 (1 << 14) - (1 << 29) );
904 p_pes->i_pts += p_pcr->delta_clock;
905 if( p_pcr->c_pts == 0 )
907 p_pcr->delta_decode = mdate() - p_pes->i_pts + 500000;
909 p_pes->i_pts += p_pcr->delta_decode;
912 pthread_mutex_unlock( &p_pcr->lock );
917 /* Now we've parsed the header, we just have to indicate in some
918 specific TS packets where the PES payload begins (renumber
919 i_payload_start), so that the decoders can find the beginning
920 of their data right out of the box. */
921 p_ts = p_pes->p_first_ts;
922 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
923 while( i_pes_header_size > i_ts_payload_size )
925 /* These packets are entirely filled by the PES header. */
926 i_pes_header_size -= i_ts_payload_size;
927 p_ts->i_payload_start = p_ts->i_payload_end;
928 /* Go to the next TS packet: here we won't have to test it is
929 not NULL because we trash the PES packets when packet lost
931 p_ts = p_ts->p_next_ts;
932 i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
934 /* This last packet is partly header, partly payload. */
935 p_ts->i_payload_start += i_pes_header_size;
937 /* Now we can eventually put the PES packet in the decoder's
939 switch( p_es_descriptor->i_type )
943 p_fifo = &(((vdec_thread_t*)(p_es_descriptor->p_dec))->fifo);
947 p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
950 /* This should never happen. */
951 intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
952 p_es_descriptor->i_id, p_es_descriptor->i_type);
959 pthread_mutex_lock( &p_fifo->data_lock );
960 if( DECODER_FIFO_ISFULL( *p_fifo ) )
962 /* The FIFO is full !!! This should not happen. */
964 p_input->c_ts_packets_trashed += p_pes->i_ts_packets;
965 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
967 input_NetlistFreePES( p_input, p_pes );
968 intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
969 p_es_descriptor->i_id, p_es_descriptor->i_type);
973 // intf_DbgMsg("Putting %p into fifo %p/%d\n",
974 // p_pes, p_fifo, p_fifo->i_end);
975 p_fifo->buffer[p_fifo->i_end] = p_pes;
976 DECODER_FIFO_INCEND( *p_fifo );
978 /* Warn the decoder that it's got work to do. */
979 pthread_cond_signal( &p_fifo->data_wait );
981 pthread_mutex_unlock( &p_fifo->data_lock );
985 intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
987 p_input->c_ts_packets_trashed += p_pes->i_ts_packets;
988 p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
990 input_NetlistFreePES( p_input, p_pes );
996 /* If we are at the beginning of a new PES packet, we must fetch a new
997 PES buffer to begin with the reassembly of this PES packet. This is
998 also here that we can synchronise with the stream if we we lost
999 packets or if the decoder has just started */
1004 /* Get a new one PES from the PES netlist. */
1005 if( (p_pes = input_NetlistGetPES( p_input )) == (NULL) )
1007 /* PES netlist is empty ! */
1008 p_input->b_error = 1;
1012 // intf_DbgMsg("New PES packet %p (first TS: %p)\n", p_pes, p_ts_packet);
1014 /* Init the PES fields so that the first TS packet could be correctly
1015 added to the PES packet (see below) */
1016 p_pes->p_first_ts = p_ts_packet;
1017 p_pes->p_last_ts = NULL;
1019 /* If the last pes packet was null, this means that the synchronisation
1020 was lost and so warn the decoder that he will have to find a way to
1023 p_pes->b_data_loss = 1;
1025 /* Read the b_random_access flag status and then reinit it */
1026 p_pes->b_random_access = p_es_descriptor->b_random;
1027 p_es_descriptor->b_random = 0;
1032 /* If we are synchronised with the stream, and so if we are ready to
1033 receive correctly the data, add the TS packet to the current PES
1037 // intf_DbgMsg("Adding TS %p to PES %p\n", p_ts_packet, p_pes);
1039 /* Size of the payload carried in the TS packet */
1040 i_ts_payload_size = p_ts_packet->i_payload_end -
1041 p_ts_packet->i_payload_start;
1043 /* Update the relations between the TS packets */
1044 p_ts_packet->p_prev_ts = p_pes->p_last_ts;
1045 p_ts_packet->p_next_ts = NULL;
1046 if( p_pes->i_ts_packets != 0 )
1048 /* Regarder si il serait pas plus efficace de ne creer que les liens
1049 precedent->suivant pour le moment, et les liens suivant->precedent
1050 quand le paquet est termine */
1051 /* Otherwise it is the first TS packet. */
1052 p_pes->p_last_ts->p_next_ts = p_ts_packet;
1054 /* Now add the TS to the PES packet */
1055 p_pes->p_last_ts = p_ts_packet;
1056 p_pes->i_ts_packets++;
1057 p_pes->i_pes_size += i_ts_payload_size;
1061 i_dummy = p_ts_packet->i_payload_end - p_ts_packet->i_payload_start;
1062 p_es_descriptor->c_payload_bytes += i_dummy;
1067 /* Since we don't use the TS packet to build a PES packet, we don't
1068 need it anymore, so give it back to the netlist */
1069 // intf_DbgMsg("Trashing TS %p: no PES being build\n", p_ts_packet);
1070 input_NetlistFreeTS( p_input, p_ts_packet );
1079 /*******************************************************************************
1081 *******************************************************************************
1082 * Notice that current ES state has been locked by input_SortPacket. (No more true,
1083 * changed by benny - See if it'a ok, and definitely change the code ???????? )
1084 *******************************************************************************/
1085 static __inline__ void input_DemuxPSI( input_thread_t *p_input,
1086 ts_packet_t *p_ts_packet,
1087 es_descriptor_t *p_es_descriptor,
1088 boolean_t b_unit_start, boolean_t b_packet_lost )
1090 int i_data_offset; /* Offset of the interesting data in the TS packet */
1091 u16 i_data_length; /* Length of those data */
1092 boolean_t b_first_section; /* Was there another section in the TS packet ? */
1095 ASSERT(p_ts_packet);
1096 ASSERT(p_es_descriptor);
1098 #define p_psi (p_es_descriptor->p_psi_section)
1100 // intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
1102 // 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);
1104 /* The section we will deal with during the first iteration of the following
1105 loop is the first one contained in the TS packet */
1106 b_first_section = 1;
1108 /* Reassemble the pieces of sections contained in the TS packet and decode
1109 the sections that could have been completed */
1112 /* Has the reassembly of a section already began in a previous packet ? */
1113 if( p_psi->b_running_section )
1115 /* Was data lost since the last TS packet ? */
1118 /* Discard the section and wait for the begining of a new one to resynch */
1119 p_psi->b_running_section = 0;
1120 intf_DbgMsg( "Section discarded due to packet loss\n" );
1124 /* The data that complete a previously began section are always at
1125 the beginning of the TS payload... */
1126 i_data_offset = p_ts_packet->i_payload_start;
1127 /* ...Unless there is a pointer field, that we have to bypass */
1130 // intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
1133 /* We are looking for the beginning of a new section */
1138 /* Cannot do anything with those data: trash both PSI section and TS packet */
1139 p_psi->b_running_section = 0;
1144 /* Get the offset at which the data for that section can be found */
1145 if( b_first_section )
1147 /* The offset is stored in the pointer_field since we are interested in
1148 the first section of the TS packet. Note that the +1 is to bypass
1149 the pointer field */
1150 i_data_offset = p_ts_packet->i_payload_start +
1151 p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
1155 /* Since no gap is allowed between 2 sections in a TS packet, the
1156 offset is given by the end of the previous section. In fact, there
1157 is nothing to do, i_offset was set to the right value in the
1158 previous iteration */
1160 // intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
1162 /* Read the length of that section */
1163 p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
1164 // intf_DbgMsg( "Section length %d\n", p_psi->i_length );
1165 if( p_psi->i_length > PSI_SECTION_SIZE )
1167 /* The TS packet is corrupted, stop here to avoid possible a seg fault */
1168 intf_DbgMsg( "Section size is too big, aborting its reception\n" );
1172 /* Init the reassembly of that section */
1173 p_psi->b_running_section = 1;
1174 p_psi->i_current_position = 0;
1178 /* Compute the length of data related to the section in this TS packet */
1179 if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
1180 i_data_length = TS_PACKET_SIZE - i_data_offset;
1182 i_data_length = p_psi->i_length - p_psi->i_current_position;
1184 /* Copy those data in the section buffer */
1185 memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
1188 /* Interesting data are now after the ones we copied */
1189 i_data_offset += i_data_length;
1191 /* Decode the packet if it is now complete */
1192 if (p_psi->i_length == p_psi->i_current_position + i_data_length)
1194 /* Packet is complete, decode it */
1195 // intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
1196 input_PsiDecode( p_input, p_psi );
1198 /* Prepare the buffer to receive a new section */
1199 p_psi->i_current_position = 0;
1200 p_psi->b_running_section = 0;
1202 /* The new section won't be the first anymore */
1203 b_first_section = 0;
1207 /* Prepare the buffer to receive the next part of the section */
1208 p_psi->i_current_position += i_data_length;
1209 // intf_DbgMsg( "Section not complete, waiting for the end\n" );
1212 // intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
1213 // i_data_offset, p_ts_packet->buffer[i_data_offset] );
1215 /* Stop if we reached the end of the packet or stuffing bytes */
1216 while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF );
1218 /* Relase the TS packet, we don't need it anymore */
1219 input_NetlistFreeTS( p_input, p_ts_packet );