input.c 54.6 KB
Newer Older
1 2
/*****************************************************************************
 * input.c: input thread
Michel Kaempf's avatar
Michel Kaempf committed
3 4
 * Read an MPEG2 stream, demultiplex and parse it before sending it to
 * decoders.
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 *****************************************************************************
 * Copyright (C) 1998, 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
24
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
25

26
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
27
 * Preamble
28
 *****************************************************************************/
29 30
#include "defs.h"

31
#include <errno.h>                                                  /* errno */
32 33
#include <sys/types.h>                        /* on BSD, uio.h needs types.h */
#include <sys/uio.h>                                            /* "input.h" */
34
#include <string.h>                                            /* strerror() */
Michel Kaempf's avatar
Michel Kaempf committed
35

36 37
#include <stdlib.h>                                                /* free() */
#include <netinet/in.h>                                           /* ntohs() */
Michel Kaempf's avatar
Michel Kaempf committed
38 39

#include "config.h"
40 41
#include "common.h"
#include "threads.h"
Michel Kaempf's avatar
Michel Kaempf committed
42 43
#include "mtime.h"
#include "intf_msg.h"
44
#include "plugins.h"
Michel Kaempf's avatar
Michel Kaempf committed
45 46 47 48 49 50 51 52 53 54
#include "debug.h"

#include "input.h"
#include "input_psi.h"
#include "input_pcr.h"
#include "input_netlist.h"
#include "decoder_fifo.h"
#include "input_file.h"
#include "input_network.h"

55
#include "audio_output.h"                                   /* aout_thread_t */
56

Michel Lespinasse's avatar
 
Michel Lespinasse committed
57 58
#include "audio_decoder.h"        /* audiodec_t (for audio_decoder_thread.h) */
#include "audio_decoder_thread.h"                           /* adec_thread_t */
59

60 61 62
#include "ac3_decoder.h"              /* ac3dec_t (for ac3_decoder_thread.h) */
#include "ac3_decoder_thread.h"                           /* ac3dec_thread_t */

63 64 65 66 67 68 69 70 71 72 73
#include "video.h"                          /* picture_t (for video_output.h) */
#include "video_output.h"                                   /* vout_thread_t */

#include "vdec_idct.h"                     /* dctelem_t (for video_parser.h) */
#include "vdec_motion.h"                  /* f_motion_t (for video_parser.h) */
#include "vpar_blocks.h"                /* macroblock_t (for video_parser.h) */
#include "vpar_headers.h"                 /* sequence_t (for video_parser.h) */
#include "vpar_synchro.h"            /* video_synchro_t (for video_parser.h) */
#include "video_parser.h"                                   /* vpar_thread_t */

#include "spu_decoder.h"                                  /* spudec_thread_t */
Michel Lespinasse's avatar
Yop,  
Michel Lespinasse committed
74 75

#include "main.h"
Michel Kaempf's avatar
Michel Kaempf committed
76

77
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
78
 * Local prototypes
79
 *****************************************************************************/
80 81 82 83 84 85 86 87
static void RunThread   ( input_thread_t *p_input );
static void ErrorThread ( input_thread_t *p_input );
static void EndThread   ( input_thread_t *p_input );

static __inline__ int   input_ReadPacket( input_thread_t *p_input );
static __inline__ void  input_SortPacket( input_thread_t *p_input,
                                          ts_packet_t *ts_packet );
static __inline__ void  input_DemuxTS( input_thread_t *p_input,
Michel Kaempf's avatar
Michel Kaempf committed
88
                                       ts_packet_t *ts_packet,
89 90 91 92 93 94 95 96 97
                                       es_descriptor_t *es_descriptor );
static __inline__ void  input_DemuxPES( input_thread_t *p_input,
                                        ts_packet_t *ts_packet,
                                        es_descriptor_t *p_es_descriptor,
                                        boolean_t b_unit_start, boolean_t b_packet_lost );
static __inline__ void  input_DemuxPSI( input_thread_t *p_input,
                                        ts_packet_t *ts_packet,
                                        es_descriptor_t *p_es_descriptor,
                                        boolean_t b_unit_start, boolean_t b_packet_lost );
Michel Kaempf's avatar
Michel Kaempf committed
98

99
/*****************************************************************************
100
 * input_CreateThread: creates a new input thread
101
 *****************************************************************************
102 103 104 105
 * This function creates a new input, and returns a pointer
 * to its description. On error, it returns NULL.
 * If pi_status is NULL, then the function will block until the thread is ready.
 * If not, it will be updated using one of the THREAD_* constants.
106
 *****************************************************************************/
107 108
input_thread_t *input_CreateThread ( int i_method, char *psz_source, int i_port, int i_vlan,
                                     p_vout_thread_t p_vout, p_aout_thread_t p_aout, int *pi_status )
Michel Kaempf's avatar
Michel Kaempf committed
109
{
110 111 112 113
    input_thread_t *    p_input;                        /* thread descriptor */
    int                 i_status;                           /* thread status */
    int                 i_index;          /* index for tables initialization */

114 115 116 117
    /* Allocate descriptor */
    intf_DbgMsg("\n");
    p_input = (input_thread_t *)malloc( sizeof(input_thread_t) );
    if( p_input == NULL )
Michel Kaempf's avatar
Michel Kaempf committed
118
    {
119
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
Michel Kaempf's avatar
Michel Kaempf committed
120 121
        return( NULL );
    }
122 123 124 125 126 127 128 129 130 131 132 133 134

    /* Initialize thread properties */
    p_input->b_die              = 0;
    p_input->b_error            = 0;
    p_input->pi_status          = (pi_status != NULL) ? pi_status : &i_status;
    *p_input->pi_status         = THREAD_CREATE;

    /* Initialize input method description */
    p_input->i_method           = i_method;
    p_input->psz_source         = psz_source;
    p_input->i_port             = i_port;
    p_input->i_vlan             = i_vlan;
    switch( i_method )
Michel Kaempf's avatar
Michel Kaempf committed
135
    {
136
    case INPUT_METHOD_TS_FILE:                               /* file methods */
137 138 139 140
        p_input->p_Open =   input_FileOpen;
        p_input->p_Read =   input_FileRead;
        p_input->p_Close =  input_FileClose;
        break;
141
    case INPUT_METHOD_TS_VLAN_BCAST:                  /* vlan network method */
142 143 144 145
        if( !p_main->b_vlans )
        {
            intf_ErrMsg("error: vlans are not activated\n");
            free( p_input );
146 147
            return( NULL );
        }
148
        /* ... pass through */
149
    case INPUT_METHOD_TS_UCAST:                           /* network methods */
150 151 152 153 154 155 156 157 158
    case INPUT_METHOD_TS_MCAST:
    case INPUT_METHOD_TS_BCAST:
        p_input->p_Open =   input_NetworkOpen;
        p_input->p_Read =   input_NetworkRead;
        p_input->p_Close =  input_NetworkClose;
        break;
    default:
        intf_ErrMsg("error: unknow input method\n");
        free( p_input );
159 160
        return( NULL );
        break;
Michel Kaempf's avatar
Michel Kaempf committed
161 162
    }

163 164
    /* Initialize stream description */
    for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
Michel Kaempf's avatar
Michel Kaempf committed
165
    {
166
        p_input->p_es[i_index].i_id = EMPTY_PID;
167
        p_input->pp_selected_es[i_index] = NULL;
Michel Kaempf's avatar
Michel Kaempf committed
168
    }
169

170 171
    /* Initialize default settings for spawned decoders */
    p_input->p_aout                     = p_aout;
172
    p_input->p_vout                     = p_vout;
Michel Kaempf's avatar
Michel Kaempf committed
173

174 175
#ifdef STATS
    /* Initialize statistics */
176
    p_input->c_loops                    = 0;
177 178 179 180
    p_input->c_bytes                    = 0;
    p_input->c_payload_bytes            = 0;
    p_input->c_packets_read             = 0;
    p_input->c_packets_trashed          = 0;
Michel Kaempf's avatar
Michel Kaempf committed
181 182
#endif

183 184
    /* Initialize PSI and PCR decoders */
    if( input_PsiInit( p_input ) )
Michel Kaempf's avatar
Michel Kaempf committed
185 186 187 188 189
    {
        free( p_input );
        return( NULL );
    }

190
    if( input_PcrInit( p_input ) )
Michel Kaempf's avatar
Michel Kaempf committed
191
    {
192
        input_PsiEnd( p_input );
Michel Kaempf's avatar
Michel Kaempf committed
193 194 195 196
        free( p_input );
        return( NULL );
    }

197 198
    /* Initialize netlists */
    if( input_NetlistInit( p_input ) )
Michel Kaempf's avatar
Michel Kaempf committed
199
    {
200 201
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
Michel Kaempf's avatar
Michel Kaempf committed
202 203 204 205
        free( p_input );
        return( NULL );
    }

206 207
    intf_DbgMsg("configuration: method=%d, source=%s, port=%d, vlan=%d\n",
                i_method, psz_source, i_port, i_vlan );
Michel Kaempf's avatar
Michel Kaempf committed
208 209

    /* Let the appropriate method open the socket. */
210
    if( p_input->p_Open( p_input ) )
Michel Kaempf's avatar
Michel Kaempf committed
211
    {
212 213 214
        input_NetlistEnd( p_input );
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
Michel Kaempf's avatar
Michel Kaempf committed
215 216 217 218 219
        free( p_input );
        return( NULL );
    }

    /* Create thread and set locks. */
220 221 222
    vlc_mutex_init( &p_input->netlist.lock );
    vlc_mutex_init( &p_input->programs_lock );
    vlc_mutex_init( &p_input->es_lock );
223
    if( vlc_thread_create(&p_input->thread_id, "input", (void *) RunThread, (void *) p_input) )
Michel Kaempf's avatar
Michel Kaempf committed
224
    {
225 226 227 228 229
        intf_ErrMsg("error: %s\n", strerror(errno) );
        p_input->p_Close( p_input );
        input_NetlistEnd( p_input );;
        input_PsiEnd( p_input );
        input_PcrEnd( p_input );
Michel Kaempf's avatar
Michel Kaempf committed
230 231 232
        free( p_input );
        return( NULL );
    }
233

234
    intf_Msg("Input initialized\n");
235

236 237 238 239
    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
240
        {
241
            msleep( THREAD_SLEEP );
242
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
243 244 245
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
246 247
            return( NULL );
        }
248
    }
Michel Kaempf's avatar
Michel Kaempf committed
249 250 251
    return( p_input );
}

252
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
253
 * input_DestroyThread: mark an input thread as zombie
254
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
255
 * This function should not return until the thread is effectively cancelled.
256
 *****************************************************************************/
257
void input_DestroyThread( input_thread_t *p_input, int *pi_status )
Michel Kaempf's avatar
Michel Kaempf committed
258
{
259
    int         i_status;                                   /* thread status */
260 261 262

    /* Set status */
    p_input->pi_status = (pi_status != NULL) ? pi_status : &i_status;
263 264
    *p_input->pi_status = THREAD_DESTROY;

265 266
    /* Request thread destruction */
    p_input->b_die = 1;
Michel Kaempf's avatar
Michel Kaempf committed
267

268 269 270 271 272 273
    /* If status is NULL, wait until thread has been destroyed */
    if( pi_status == NULL )
    {
        do
        {
            msleep( THREAD_SLEEP );
274 275
        }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
                && (i_status != THREAD_FATAL) );
276
    }
Michel Kaempf's avatar
Michel Kaempf committed
277 278 279
}

#if 0
280
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
281
 * input_OpenAudioStream: open an audio stream
282
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
283 284
 * This function spawns an audio decoder and plugs it on the audio output
 * thread.
285
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
286 287
int input_OpenAudioStream( input_thread_t *p_input, int i_id )
{
288
    /* XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
289 290
}

291
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
292
 * input_CloseAudioStream: close an audio stream
293
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
294
 * This function destroys an audio decoder.
295
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
296 297
void input_CloseAudioStream( input_thread_t *p_input, int i_id )
{
298
    /* XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
299 300
}

301
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
302
 * input_OpenVideoStream: open a video stream
303
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
304
 * This function spawns a video decoder and plugs it on a video output thread.
305 306
 *****************************************************************************/
int input_OpenVideoStream( input_thread_t *p_input,
Michel Kaempf's avatar
Michel Kaempf committed
307 308
                           struct vout_thread_s *p_vout, struct video_cfg_s * p_cfg )
{
309
    /* XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
310 311
}

312
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
313
 * input_CloseVideoStream: close a video stream
314
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
315
 * This function destroys an video decoder.
316
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
317 318
void input_CloseVideoStream( input_thread_t *p_input, int i_id )
{
319
    /* XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
320 321 322 323 324
}
#endif

/* following functions are local */

325
/*****************************************************************************
326
 * InitThread: initialize input thread
327
 *****************************************************************************
328 329 330
 * This function is called from RunThread and performs the second step of the
 * initialization. It returns 0 on success. Note that the thread's flag are not
 * modified inside this function.
331
 *****************************************************************************/
332 333 334 335
static int InitThread( input_thread_t *p_input )
{
    /* Mark thread as running and return */
    intf_DbgMsg("\n");
336 337 338
    *p_input->pi_status =        THREAD_READY;
    intf_DbgMsg("thread ready\n");
    return( 0 );
339 340
}

341
/*****************************************************************************
342
 * RunThread: main thread loop
343
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
344
 * Thread in charge of processing the network packets and demultiplexing.
345
 *****************************************************************************/
346
static void RunThread( input_thread_t *p_input )
Michel Kaempf's avatar
Michel Kaempf committed
347
{
348 349
    /*
     * Initialize thread and free configuration
350 351 352 353
     */
    p_input->b_error = InitThread( p_input );
    if( p_input->b_error )
    {
354 355
        free( p_input );                               /* destroy descriptor */
        return;
356 357 358 359 360 361
    }

    /*
     * Main loop
     */
    intf_DbgMsg("\n");
362
    while( !p_input->b_die && !p_input->b_error )
Michel Kaempf's avatar
Michel Kaempf committed
363 364 365 366
    {
        /* Scatter read the UDP packet from the network or the file. */
        if( (input_ReadPacket( p_input )) == (-1) )
        {
367
            /* FIXME??: Normally, a thread can't kill itself, but we don't have
Michel Kaempf's avatar
Michel Kaempf committed
368
             * any method in case of an error condition ... */
369
            p_input->b_error = 1;
Michel Kaempf's avatar
Michel Kaempf committed
370 371
        }

372
#ifdef STATS
Michel Kaempf's avatar
Michel Kaempf committed
373 374 375 376
        p_input->c_loops++;
#endif
    }

377 378 379
    /*
     * Error loop
     */
380 381 382 383 384
    if( p_input->b_error )
    {
        ErrorThread( p_input );
    }

385
    /* End of thread */
386
    EndThread( p_input );
387
    intf_DbgMsg("thread end\n");
Michel Kaempf's avatar
Michel Kaempf committed
388 389
}

390

391
/*****************************************************************************
392
 * ErrorThread: RunThread() error loop
393 394 395
 *****************************************************************************
 * This function is called when an error occured during thread main's loop.
 *****************************************************************************/
396 397
static void ErrorThread( input_thread_t *p_input )
{
398 399
    /* Wait until a `die' order */
    intf_DbgMsg("\n");
400 401
    while( !p_input->b_die )
    {
402 403
        /* Sleep a while */
        msleep( VOUT_IDLE_SLEEP );
404 405 406
    }
}

407
/*****************************************************************************
408
 * EndThread: end the input thread
409
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
410
static void EndThread( input_thread_t * p_input )
411
{
412 413
    int *       pi_status;                                  /* threas status */
    int         i_es_loop;                                       /* es index */
414 415 416

    /* Store status */
    intf_DbgMsg("\n");
417 418
    pi_status = p_input->pi_status;
    *pi_status = THREAD_END;
419

420 421
    /* Close input method */
    p_input->p_Close( p_input );
422

423
    /* Destroy all decoder threads */
424 425
    for( i_es_loop = 0;
         (i_es_loop < INPUT_MAX_ES) && (p_input->pp_selected_es[i_es_loop] != NULL) ;
426
         i_es_loop++ )
427
    {
428
        switch( p_input->pp_selected_es[i_es_loop]->i_type )
429
        {
430 431
        case MPEG1_VIDEO_ES:
        case MPEG2_VIDEO_ES:
432
#ifdef OLD_DECODER
433
            vdec_DestroyThread( (vdec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
434
#else
435
            vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
436
#endif
437
            break;
438 439 440 441 442 443
        case MPEG1_AUDIO_ES:
        case MPEG2_AUDIO_ES:
            adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
            break;
        case AC3_AUDIO_ES:
            ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
444
            break;
445 446 447
        case DVD_SPU_ES:
            spudec_DestroyThread( (spudec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
            break;
448 449 450
        case 0:
            /* Special streams for the PSI decoder, PID 0 and 1 */
            break;
451 452 453
#ifdef DEBUG
        default:
            intf_DbgMsg("error: unknown decoder type %d\n", p_input->pp_selected_es[i_es_loop]->i_type );
454
            break;
455
#endif
456 457 458
        }
    }

459 460 461 462
    input_NetlistEnd( p_input );                            /* clean netlist */
    input_PsiEnd( p_input );                        /* clean PSI information */
    input_PcrEnd( p_input );                        /* clean PCR information */
    free( p_input );                          /* free input_thread structure */
463

464
    /* Update status */
465
    *pi_status = THREAD_OVER;
466 467
}

468
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
469
 * input_ReadPacket: reads a packet from the network or the file
470
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512
static __inline__ int input_ReadPacket( input_thread_t *p_input )
{
    int                 i_base_index; /* index of the first free iovec */
    int                 i_current_index;
    int                 i_packet_size;
#ifdef INPUT_LIFO_TS_NETLIST
    int                 i_meanwhile_released;
    int                 i_currently_removed;
#endif
    ts_packet_t *       p_ts_packet;

    /* In this function, we only care about the TS netlist. PES netlist
     * is for the demultiplexer. */
#ifdef INPUT_LIFO_TS_NETLIST
    i_base_index = p_input->netlist.i_ts_index;

    /* Verify that we still have packets in the TS netlist */
    if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
    {
        intf_ErrMsg("input error: TS netlist is empty !\n");
        return( -1 );
    }

#else /* FIFO netlist */
    i_base_index = p_input->netlist.i_ts_start;
    if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
    {
        /* The netlist is splitted in 2 parts. We must gather them to consolidate
           the FIFO (we make the loop easily in having the same iovec at the far
           end and in the beginning of netlist_free).
           That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
           large. */
        memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
                p_input->netlist.p_ts_free,
                (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
                  * sizeof(struct iovec) );
    }

    /* Verify that we still have packets in the TS netlist */
    if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
    {
        intf_ErrMsg("input error: TS netlist is empty !\n");
513
        return( -1 );
Michel Kaempf's avatar
Michel Kaempf committed
514 515 516 517
    }
#endif /* FIFO netlist */

    /* Scatter read the buffer. */
518
    i_packet_size = (*p_input->p_Read)( p_input,
Michel Kaempf's avatar
Michel Kaempf committed
519 520 521 522
                           &p_input->netlist.p_ts_free[i_base_index],
                           INPUT_TS_READ_ONCE );
    if( i_packet_size == (-1) )
    {
523 524 525 526 527 528
#if 0
        intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
                    &p_input->netlist.p_ts_free[i_base_index],
                    p_input->netlist.i_ts_start,
                    p_input->netlist.i_ts_end);
#endif
Michel Kaempf's avatar
Michel Kaempf committed
529 530 531 532 533 534 535 536 537
        intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
        return( -1 );
    }

    if( i_packet_size == 0 )
    {
        /* No packet has been received, so stop here. */
        return( 0 );
    }
538

Michel Kaempf's avatar
Michel Kaempf committed
539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
    /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
    for( i_current_index = i_base_index;
         (i_packet_size -= TS_PACKET_SIZE) >= 0;
         i_current_index++ )
    {
        /* BTW, something REALLY bad could happen if we receive packets with
           a wrong size. */
        p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
        /* Don't cry :-), we are allowed to do that cast, because initially,
           our buffer was malloc'ed with sizeof(ts_packet_t) */

        /* Find out if we need this packet and demultiplex. */
        input_SortPacket( p_input /* for current PIDs and netlist */,
                          p_ts_packet);
    }

    if( i_packet_size > 0 )
    {
        intf_ErrMsg("input error: wrong size\n");
        return( -1 );
    }

    /* Remove the TS packets we have just filled from the netlist */
#ifdef INPUT_LIFO_TS_NETLIST
    /* We need to take a lock here while we're calculating index positions. */
564
    vlc_mutex_lock( &p_input->netlist.lock );
Michel Kaempf's avatar
Michel Kaempf committed
565 566 567 568 569 570 571 572

    i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
    if( i_meanwhile_released )
    {
        /* That's where it becomes funny :-). Since we didn't take locks for
           efficiency reasons, other threads (including ourselves, with
           input_DemuxPacket) might have released packets to the netlist.
           So we have to copy these iovec where they should go.
573

Michel Kaempf's avatar
Michel Kaempf committed
574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603
           BTW, that explains why the TS netlist is
           (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */

        i_currently_removed = i_current_index - i_base_index;
        if( i_meanwhile_released < i_currently_removed )
        {
            /* Copy all iovecs in that case */
            memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
                     + i_currently_removed,
                    &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
                    i_meanwhile_released * sizeof(struct iovec) );
        }
        else
        {
            /* We have fewer places than items, so we only move
               i_currently_removed of them. */
            memcpy( &p_input->netlist.p_ts_free[i_base_index],
                    &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
                    i_currently_removed * sizeof(struct iovec) );
        }

        /* Update i_netlist_index with the information gathered above. */
        p_input->netlist.i_ts_index += i_currently_removed;
    }
    else
    {
        /* Nothing happened. */
        p_input->netlist.i_ts_index = i_current_index;
    }

604
    vlc_mutex_unlock( &p_input->netlist.lock );
Michel Kaempf's avatar
Michel Kaempf committed
605 606 607 608 609 610 611

#else /* FIFO netlist */
    /* & is modulo ; that's where we make the loop. */
    p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
#endif

#ifdef STATS
612
    p_input->c_packets_read += i_current_index - i_base_index;
Michel Kaempf's avatar
Michel Kaempf committed
613 614
    p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
#endif
615
    return( 0 );
Michel Kaempf's avatar
Michel Kaempf committed
616 617
}

618
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
619
 * input_SortPacket: find out whether we need that packet
620
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639
static __inline__ void input_SortPacket( input_thread_t *p_input,
                                         ts_packet_t *p_ts_packet )
{
    int             i_current_pid;
    int             i_es_loop;

    /* Verify that sync_byte, error_indicator and scrambling_control are
       what we expected. */
    if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
        (p_ts_packet->buffer[3] & 0xc0) )
    {
        intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
    }
    else
    {
        /* Get the PID of the packet. Note that ntohs is needed, for endianness
           purposes (see man page). */
        i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;

640 641
        //intf_DbgMsg("input debug: pid %d received (%p)\n",
        //            i_current_pid, p_ts_packet);
Michel Kaempf's avatar
Michel Kaempf committed
642 643

        /* Lock current ES state. */
644
        vlc_mutex_lock( &p_input->es_lock );
645

646
    /* Verify that we actually want this PID. */
Michel Kaempf's avatar
Michel Kaempf committed
647 648 649 650 651 652 653 654 655 656 657 658
        for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
        {
            if( p_input->pp_selected_es[i_es_loop] != NULL)
            {
                if( (*p_input->pp_selected_es[i_es_loop]).i_id
                     == i_current_pid )
                {
                    /* Don't need the lock anymore, since the value pointed
                       out by p_input->pp_selected_es[i_es_loop] can only be
                       modified from inside the input_thread (by the PSI
                       decoder): interface thread is only allowed to modify
                       the pp_selected_es table */
659
                    vlc_mutex_unlock( &p_input->es_lock );
Michel Kaempf's avatar
Michel Kaempf committed
660 661 662 663 664

                    /* We're interested. Pass it to the demultiplexer. */
                    input_DemuxTS( p_input, p_ts_packet,
                                   p_input->pp_selected_es[i_es_loop] );
                    return;
665
                }
Michel Kaempf's avatar
Michel Kaempf committed
666 667 668 669 670 671 672
            }
            else
            {
                /* pp_selected_es should not contain any hole. */
                break;
            }
        }
673
        vlc_mutex_unlock( &p_input->es_lock );
Michel Kaempf's avatar
Michel Kaempf committed
674 675 676 677
    }

    /* We weren't interested in receiving this packet. Give it back to the
       netlist. */
678 679
    //intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
    //                 U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
Michel Kaempf's avatar
Michel Kaempf committed
680 681
    input_NetlistFreeTS( p_input, p_ts_packet );
#ifdef STATS
682
    p_input->c_packets_trashed++;
Michel Kaempf's avatar
Michel Kaempf committed
683 684 685
#endif
}

686
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
687
 * input_DemuxTS: first step of demultiplexing: the TS header
688
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
689
 * Stream must also only contain PES and PSI, so PID must have been filtered
690
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
691 692 693 694 695
static __inline__ void input_DemuxTS( input_thread_t *p_input,
                                      ts_packet_t *p_ts_packet,
                                      es_descriptor_t *p_es_descriptor )
{
    int         i_dummy;
696 697 698 699 700
    boolean_t   b_adaption;                     /* Adaption field is present */
    boolean_t   b_payload;                         /* Packet carries payload */
    boolean_t   b_unit_start;          /* A PSI or a PES start in the packet */
    boolean_t   b_trash = 0;                 /* Must the packet be trashed ? */
    boolean_t   b_lost = 0;                     /* Was there a packet lost ? */
Michel Kaempf's avatar
Michel Kaempf committed
701 702 703 704 705 706 707

    ASSERT(p_input);
    ASSERT(p_ts_packet);
    ASSERT(p_es_descriptor);

#define p (p_ts_packet->buffer)

708 709
    //intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
    //            p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
Michel Kaempf's avatar
Michel Kaempf committed
710 711 712 713 714 715 716 717 718 719

#ifdef STATS
    p_es_descriptor->c_packets++;
    p_es_descriptor->c_bytes += TS_PACKET_SIZE;
#endif

    /* Extract flags values from TS common header. */
    b_unit_start = (p[1] & 0x40);
    b_adaption = (p[3] & 0x20);
    b_payload = (p[3] & 0x10);
720

Michel Kaempf's avatar
Michel Kaempf committed
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737
    /* Extract adaption field informations if any */
    if( !b_adaption )
    {
        /* We don't have any adaptation_field, so payload start immediately
         after the 4 byte TS header */
        p_ts_packet->i_payload_start = 4;
    }
    else
    {
        /* p[4] is adaptation_field_length minus one */
        p_ts_packet->i_payload_start = 5 + p[4];

        /* The adaption field can be limited to the adaptation_field_length byte,
           so that there is nothing to do: skip this possibility */
        if( p[4] )
        {
            /* If the packet has both adaptation_field and payload, adaptation_field
Benoit Steiner's avatar
 
Benoit Steiner committed
738
               cannot be more than 182 bytes long; if there is only an
739
           adaptation_field, it must fill the next 183 bytes. */
Michel Kaempf's avatar
Michel Kaempf committed
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
            if( b_payload ? (p[4] > 182) : (p[4] != 183) )
            {
                intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
                            p_ts_packet);
#ifdef STATS
                p_es_descriptor->c_invalid_packets++;
#endif
                b_trash = 1;
            }

            /* No we are sure that the byte containing flags is present: read it */
            else
            {
                /* discontinuity_indicator */
                if( p[5] & 0x80 )
                {
                    intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
                                "(position read: %d, saved: %d)\n", p[5] & 0x80,
                                p_es_descriptor->i_continuity_counter);

                    /* If the PID carries the PCR, there will be a system time-base
                       discontinuity. We let the PCR decoder handle that. */
                    p_es_descriptor->b_discontinuity = 1;
763

Benoit Steiner's avatar
 
Benoit Steiner committed
764
                    /* There also may be a continuity_counter discontinuity:
765
               resynchronise our counter with the one of the stream */
Michel Kaempf's avatar
Michel Kaempf committed
766 767 768 769 770 771
                    p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
                }

                /* random_access_indicator */
                p_es_descriptor->b_random |= p[5] & 0x40;

Benoit Steiner's avatar
 
Benoit Steiner committed
772
                /* If this is a PCR_PID, and this TS packet contains a PCR,
773
           we pass it along to the PCR decoder. */
Michel Kaempf's avatar
Michel Kaempf committed
774 775
                if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
                {
Benoit Steiner's avatar
 
Benoit Steiner committed
776
                    /* There should be a PCR field in the packet, check if the
777
               adaption field is long enough to carry it */
Michel Kaempf's avatar
Michel Kaempf committed
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
                    if( p[4] >= 7 )
                    {
                        /* Call the PCR decoder */
                        input_PcrDecode( p_input, p_es_descriptor, &p[6] );
                    }
                }
            }
        }
    }

    /* Check the continuity of the stream. */
    i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
    if( i_dummy == 1 )
    {
        /* Everything is ok, just increase our counter */
        p_es_descriptor->i_continuity_counter++;
    }
    else
    {
        if( !b_payload && i_dummy == 0 )
        {
            /* This is a packet without payload, this is allowed by the draft
               As there is nothing interessant in this packet (except PCR that
               have already been handled), we can trash the packet. */
            intf_DbgMsg("Packet without payload received by TS demux\n");
            b_trash = 1;
        }
        else if( i_dummy <= 0 )
        {
            /* Duplicate packet: mark it as being to be trashed. */
            intf_DbgMsg("Duplicate packet received by TS demux\n");
            b_trash = 1;
        }
Benoit Steiner's avatar
 
Benoit Steiner committed
811 812 813 814
        else if( p_es_descriptor->i_continuity_counter == 0xFF )
        {
            /* This means that the packet is the first one we receive for this
               ES since the continuity counter ranges between 0 and 0x0F
815
               excepts when it has been initialized by the input: Init the
Benoit Steiner's avatar
 
Benoit Steiner committed
816 817 818 819 820
               counter to the correct value. */
            intf_DbgMsg("First packet for PID %d received by TS demux\n",
                        p_es_descriptor->i_id);
            p_es_descriptor->i_continuity_counter = (p[3] & 0x0f);
        }
Michel Kaempf's avatar
Michel Kaempf committed
821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
        else
        {
            /* This can indicate that we missed a packet or that the
               continuity_counter wrapped and we received a dup packet: as we
               don't know, do as if we missed a packet to be sure to recover
               from this situation */
            intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
                        p_es_descriptor->i_continuity_counter & 0x0f,
                        p[3] & 0x0f);
            b_lost = 1;
            p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
        }
    }

    /* Trash the packet if it has no payload or if it is bad */
    if( b_trash )
    {
        input_NetlistFreeTS( p_input, p_ts_packet );
#ifdef STATS
840
        p_input->c_packets_trashed++;
Michel Kaempf's avatar
Michel Kaempf committed
841 842 843 844 845 846 847 848 849 850 851 852
#endif
    }
    else
    {
        if( p_es_descriptor->b_psi )
        {
            /* The payload contains PSI tables */
            input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
                            b_unit_start, b_lost );
        }
        else
        {
853
            /* The payload carries a PES stream */
Michel Kaempf's avatar
Michel Kaempf committed
854 855 856 857 858 859 860 861 862 863 864
            input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
                            b_unit_start, b_lost );
        }
    }

#undef p
}




865 866 867
/*****************************************************************************
 * input_DemuxPES:
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
868
 * Gather a PES packet and analyzes its header.
869
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
870 871 872 873 874 875 876 877 878 879 880 881
static __inline__ void input_DemuxPES( input_thread_t *p_input,
                                       ts_packet_t *p_ts_packet,
                                       es_descriptor_t *p_es_descriptor,
                                       boolean_t b_unit_start,
                                       boolean_t b_packet_lost )
{
    decoder_fifo_t *            p_fifo;
    u8                          i_pes_header_size;
    int                         i_dummy;
    pes_packet_t*               p_last_pes;
    ts_packet_t *               p_ts;
    int                         i_ts_payload_size;
882

Michel Kaempf's avatar
Michel Kaempf committed
883 884 885 886 887 888 889

#define p_pes (p_es_descriptor->p_pes_packet)

    ASSERT(p_input);
    ASSERT(p_ts_packet);
    ASSERT(p_es_descriptor);

890
    //intf_DbgMsg("PES-demultiplexing %p (%p)\n", p_ts_packet, p_pes);
Michel Kaempf's avatar
Michel Kaempf committed
891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906

    /* If we lost data, discard the PES packet we are trying to reassemble
       if any and wait for the beginning of a new one in order to synchronise
       again */
    if( b_packet_lost && p_pes != NULL )
    {
        intf_DbgMsg("PES %p trashed because of packet lost\n", p_pes);
        input_NetlistFreePES( p_input, p_pes );
        p_pes = NULL;
    }

    /* If the TS packet contains the begining of a new PES packet, and if we
       were reassembling a PES packet, then the PES should be complete now,
       so parse its header and give it to the decoders */
    if( b_unit_start && p_pes != NULL )
    {
907
        //intf_DbgMsg("End of PES packet %p\n", p_pes);
Michel Kaempf's avatar
Michel Kaempf committed
908

909
        /* Parse the header. The header has a variable length, but in order
Michel Kaempf's avatar
Michel Kaempf committed
910 911 912 913 914 915 916 917
           to improve the algorithm, we will read the 14 bytes we may be
           interested in */
        p_ts = p_pes->p_first_ts;
        i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
        i_dummy = 0;

        if(i_ts_payload_size >= PES_HEADER_SIZE)
        {
918
            /* This part of the header entirely fits in the payload of
Michel Kaempf's avatar
Michel Kaempf committed
919 920 921 922 923 924 925
               the first TS packet */
            p_pes->p_pes_header = &(p_ts->buffer[p_ts->i_payload_start]);
        }
        else
        {
            /* This part of the header does not fit in the current TS packet:
               copy the part of the header we are interested in to the
Benoit Steiner's avatar
 
Benoit Steiner committed
926
               p_pes_header_save buffer. The buffer is dynamicly allocated if
927
               needed so it's time expensive but this situation almost never occur. */
Benoit Steiner's avatar
 
Benoit Steiner committed
928
            intf_DbgMsg("Code never tested encountered, WARNING ! (benny)\n");
929 930
            if( !p_pes->p_pes_header_save )
            {
931
                p_pes->p_pes_header_save = malloc(PES_HEADER_SIZE);
932
            }
Benoit Steiner's avatar
 
Benoit Steiner committed
933

Michel Kaempf's avatar
Michel Kaempf committed
934 935 936 937 938
            do
            {
                memcpy(p_pes->p_pes_header_save + i_dummy,
                       &p_ts->buffer[p_ts->i_payload_start], i_ts_payload_size);
                i_dummy += i_ts_payload_size;
939

Michel Kaempf's avatar
Michel Kaempf committed
940 941 942 943 944
                p_ts = p_ts->p_next_ts;
                if(!p_ts)
                {
                  /* The payload of the PES packet is shorter than the 14 bytes
                     we would read. This means that high packet lost occured
945
                     so the PES won't be useful for any decoder. Moreover,
Michel Kaempf's avatar
Michel Kaempf committed
946 947
                     this should never happen so we can trash the packet and
                     exit roughly without regrets */
948
                  intf_DbgMsg("PES packet too short: trashed\n");
Michel Kaempf's avatar
Michel Kaempf committed
949 950
                  input_NetlistFreePES( p_input, p_pes );
                  p_pes = NULL;
951
                  /* Stats XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
952 953
                  return;
                }
954

Michel Kaempf's avatar
Michel Kaempf committed
955 956 957 958 959 960 961 962 963 964 965 966 967
                i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
            }
            while(i_ts_payload_size + i_dummy < PES_HEADER_SIZE);

            /* This last TS packet is partly header, partly payload, so just
               copy the header part */
            memcpy(p_pes->p_pes_header_save + i_dummy,
                   &p_ts->buffer[p_ts->i_payload_start],
                   PES_HEADER_SIZE - i_dummy);

            /* The header must be read in the buffer not in any TS packet */
           p_pes->p_pes_header = p_pes->p_pes_header_save;
        }
968

Michel Kaempf's avatar
Michel Kaempf committed
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
        /* Now we have the part of the PES header we were interested in:
           parse it */

        /* First read the 6 header bytes common to all PES packets:
           use them to test the PES validity */
        if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
            (p_pes->p_pes_header[2] != 1)) ||
                                     /* packet_start_code_prefix != 0x000001 */
            ((i_dummy = U16_AT(p_pes->p_pes_header + 4)) &&
             (i_dummy + 6 != p_pes->i_pes_size)) )
                   /* PES_packet_length is set and != total received payload */
        {
          /* Trash the packet and set p_pes to NULL to be sure the next PES
             packet will have its b_data_lost flag set */
          intf_DbgMsg("Corrupted PES packet received: trashed\n");
          input_NetlistFreePES( p_input, p_pes );
          p_pes = NULL;
986
          /* Stats XXX?? */
Michel Kaempf's avatar
Michel Kaempf committed
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
        }
        else
        {
            /* The PES packet is valid. Check its type to test if it may
               carry additional informations in a header extension */
            p_pes->i_stream_id =  p_pes->p_pes_header[3];

            switch( p_pes->i_stream_id )
            {
            case 0xBE:  /* Padding */
            case 0xBC:  /* Program stream map */
            case 0xBF:  /* Private stream 2 */
            case 0xB0:  /* ECM */
            case 0xB1:  /* EMM */
            case 0xFF:  /* Program stream directory */
            case 0xF2:  /* DSMCC stream */
            case 0xF8:  /* ITU-T H.222.1 type E stream */
                /* The payload begins immediatly after the 6 bytes header, so
                   we have finished with the parsing */
                i_pes_header_size = 6;
                break;

            default:
                /* The PES header contains at least 3 more bytes: parse them */
Michel Kaempf's avatar
Michel Kaempf committed
1011 1012
                p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x04;
                p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x80;
1013
                i_pes_header_size = p_pes->p_pes_header[8] + 9;
Michel Kaempf's avatar
Michel Kaempf committed
1014

Michel Kaempf's avatar
Michel Kaempf committed
1015 1016 1017 1018
                /* Now parse the optional header extensions (in the limit of
                   the 14 bytes */
                if( p_pes->b_has_pts )
                {
Michel Kaempf's avatar
Michel Kaempf committed
1019
                    pcr_descriptor_t * p_pcr;
1020 1021

                    p_pcr = p_input->p_pcr;
1022 1023

                    p_pes->i_pts =
1024 1025 1026 1027
                        ( ((mtime_t)(p_pes->p_pes_header[9] & 0x0E) << 29) |
                          (((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) - (1 << 14)) |
                          ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) ) * 300;
                    p_pes->i_pts /= 27;
1028

1029
                    if( p_pcr->i_synchro_state )
1030
                    {
1031 1032 1033 1034 1035 1036 1037 1038
                        switch( p_pcr->i_synchro_state )
                        {
                            case SYNCHRO_NOT_STARTED:
                                p_pes->b_has_pts = 0;
                                break;

                            case SYNCHRO_START:
                                p_pes->i_pts += p_pcr->delta_pcr;
1039
                                p_pcr->delta_absolute = mdate() - p_pes->i_pts + INPUT_PTS_DELAY;
1040 1041 1042 1043 1044 1045 1046 1047 1048
                                p_pes->i_pts += p_pcr->delta_absolute;
                                p_pcr->i_synchro_state = 0;
                                break;

                            case SYNCHRO_REINIT: /* We skip a PES */
                                p_pes->b_has_pts = 0;
                                p_pcr->i_synchro_state = SYNCHRO_START;
                                break;
                        }
1049 1050 1051
                    }
                    else
                    {
1052
                        p_pes->i_pts += p_pcr->delta_pcr + p_pcr->delta_absolute;
1053
                    }
Michel Kaempf's avatar
Michel Kaempf committed
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
                }
                break;
            }

            /* Now we've parsed the header, we just have to indicate in some
               specific TS packets where the PES payload begins (renumber
               i_payload_start), so that the decoders can find the beginning
               of their data right out of the box. */
            p_ts = p_pes->p_first_ts;
            i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
            while( i_pes_header_size > i_ts_payload_size )
            {
                /* These packets are entirely filled by the PES header. */
                i_pes_header_size -= i_ts_payload_size;
                p_ts->i_payload_start = p_ts->i_payload_end;
                /* Go to the next TS packet: here we won't have to test it is
                   not NULL because we trash the PES packets when packet lost
                   occurs */
                p_ts = p_ts->p_next_ts;
                i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
            }
            /* This last packet is partly header, partly payload. */
            p_ts->i_payload_start += i_pes_header_size;

1078

Michel Kaempf's avatar
Michel Kaempf committed
1079 1080 1081 1082
            /* Now we can eventually put the PES packet in the decoder's
               PES fifo */
            switch( p_es_descriptor->i_type )
            {
1083 1084
                case MPEG1_VIDEO_ES:
                case MPEG2_VIDEO_ES:
1085
#ifdef OLD_DECODER
1086
                    p_fifo = &(((vdec_thread_t*)(p_es_descriptor->p_dec))->fifo);
1087 1088 1089
#else
                    p_fifo = &(((vpar_thread_t*)(p_es_descriptor->p_dec))->fifo);
#endif
1090 1091 1092 1093 1094 1095 1096 1097
                    break;

                case MPEG1_AUDIO_ES:
                case MPEG2_AUDIO_ES:
                    p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
                    break;

                case AC3_AUDIO_ES:
Michel Lespinasse's avatar
 
Michel Lespinasse committed
1098
#if 0
1099
                    /* we skip 4 bytes at the beginning of the AC3 payload */
1100
                    p_ts->i_payload_start += 4;
Michel Lespinasse's avatar
 
Michel Lespinasse committed
1101
#endif
1102 1103 1104
                    p_fifo = &(((ac3dec_thread_t *)(p_es_descriptor->p_dec))->fifo);
                    break;

1105 1106 1107 1108 1109 1110
                case DVD_SPU_ES:
                    /* we skip 4 bytes at the beginning of the subpicture payload */
                    p_ts->i_payload_start += 4;
                    p_fifo = &(((spudec_thread_t *)(p_es_descriptor->p_dec))->fifo);
                    break;

1111 1112 1113 1114 1115 1116
                default:
                    /* This should never happen */
                    intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
                        p_es_descriptor->i_id, p_es_descriptor->i_type);
                    p_fifo = NULL;
                    break;
Michel Kaempf's avatar
Michel Kaempf committed
1117 1118 1119 1120
            }

            if( p_fifo != NULL )
            {
1121
                vlc_mutex_lock( &p_fifo->data_lock );
Michel Kaempf's avatar
Michel Kaempf committed
1122 1123 1124 1125
                if( DECODER_FIFO_ISFULL( *p_fifo ) )
                {
                    /* The FIFO is full !!! This should not happen. */
#ifdef STATS
1126
                    p_input->c_packets_trashed += p_pes->i_ts_packets;
Michel Kaempf's avatar
Michel Kaempf committed
1127 1128 1129 1130 1131 1132
                    p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
#endif
                    input_NetlistFreePES( p_input, p_pes );
                    intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
                               p_es_descriptor->i_id, p_es_descriptor->i_type);
                }
1133
        else
Michel Kaempf's avatar
Michel Kaempf committed
1134
                {
1135 1136
                    //intf_DbgMsg("Putting %p into fifo %p/%d\n",
                    //            p_pes, p_fifo, p_fifo->i_end);
Michel Kaempf's avatar
Michel Kaempf committed
1137 1138 1139 1140
                    p_fifo->buffer[p_fifo->i_end] = p_pes;
                    DECODER_FIFO_INCEND( *p_fifo );

                    /* Warn the decoder that it's got work to do. */
1141
                    vlc_cond_signal( &p_fifo->data_wait );
Michel Kaempf's avatar
Michel Kaempf committed
1142
                }
1143
                vlc_mutex_unlock( &p_fifo->data_lock );
Michel Kaempf's avatar
Michel Kaempf committed
1144 1145 1146 1147 1148
            }
            else
            {
                intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
#ifdef STATS
1149
                p_input->c_packets_trashed += p_pes->i_ts_packets;
Michel Kaempf's avatar
Michel Kaempf committed
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
                p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
#endif
                input_NetlistFreePES( p_input, p_pes );
            }
        }
    }


    /* If we are at the beginning of a new PES packet, we must fetch a new
       PES buffer to begin with the reassembly of this PES packet. This is
       also here that we can synchronise with the stream if we we lost
1161
       packets or if the decoder has just started */
Michel Kaempf's avatar
Michel Kaempf committed
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
    if( b_unit_start )
    {
        p_last_pes = p_pes;

        /* Get a new one PES from the PES netlist. */
        if( (p_pes = input_NetlistGetPES( p_input )) == (NULL) )
        {
            /* PES netlist is empty ! */
            p_input->b_error = 1;
        }
        else
        {
1174
            //intf_DbgMsg("New PES packet %p (first TS: %p)\n", p_pes, p_ts_packet);
Michel Kaempf's avatar
Michel Kaempf committed
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186

            /* Init the PES fields so that the first TS packet could be correctly
               added to the PES packet (see below) */
            p_pes->p_first_ts = p_ts_packet;
            p_pes->p_last_ts = NULL;

            /* If the last pes packet was null, this means that the synchronisation
               was lost and so warn the decoder that he will have to find a way to
               recover */
            if( !p_last_pes )
                p_pes->b_data_loss = 1;

1187
            /* Read the b_random_access flag status and then reinit it */
Michel Kaempf's avatar
Michel Kaempf committed
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
            p_pes->b_random_access = p_es_descriptor->b_random;
            p_es_descriptor->b_random = 0;
        }
    }


    /* If we are synchronised with the stream, and so if we are ready to
       receive correctly the data, add the TS packet to the current PES
       packet */
    if( p_pes != NULL )
    {
1199
        //intf_DbgMsg("Adding TS %p to PES %p\n", p_ts_packet, p_pes);
Michel Kaempf's avatar
Michel Kaempf committed
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230

        /* Size of the payload carried in the TS packet */
        i_ts_payload_size = p_ts_packet->i_payload_end -
                            p_ts_packet->i_payload_start;

        /* Update the relations between the TS packets */
        p_ts_packet->p_prev_ts = p_pes->p_last_ts;
        p_ts_packet->p_next_ts = NULL;
        if( p_pes->i_ts_packets != 0 )
        {
            /* Regarder si il serait pas plus efficace de ne creer que les liens
               precedent->suivant pour le moment, et les liens suivant->precedent
               quand le paquet est termine */
            /* Otherwise it is the first TS packet. */
            p_pes->p_last_ts->p_next_ts = p_ts_packet;
        }
        /* Now add the TS to the PES packet */
        p_pes->p_last_ts = p_ts_packet;
        p_pes->i_ts_packets++;
        p_pes->i_pes_size += i_ts_payload_size;

        /* Stats */
#ifdef STATS
        i_dummy = p_ts_packet->i_payload_end - p_ts_packet->i_payload_start;
        p_es_descriptor->c_payload_bytes += i_dummy;
#endif
    }
    else
    {
        /* Since we don't use the TS packet to build a PES packet, we don't
           need it anymore, so give it back to the netlist */
1231
        //intf_DbgMsg("Trashing TS %p: no PES being build\n", p_ts_packet);
1232
        input_NetlistFreeTS( p_input, p_ts_packet );
Michel Kaempf's avatar
Michel Kaempf committed
1233
    }
1234

Michel Kaempf's avatar
Michel Kaempf committed
1235 1236 1237 1238 1239 1240
#undef p_pes
}




1241
/*****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
1242
 * input_DemuxPSI:
1243
 *****************************************************************************
Michel Kaempf's avatar
Michel Kaempf committed
1244
 * Notice that current ES state has been locked by input_SortPacket. (No more true,
1245
 * changed by benny - FIXME: See if it's ok, and definitely change the code ?? )
1246
 *****************************************************************************/
Michel Kaempf's avatar
Michel Kaempf committed
1247 1248 1249 1250 1251
static __inline__ void input_DemuxPSI( input_thread_t *p_input,
                                       ts_packet_t *p_ts_packet,
                                       es_descriptor_t *p_es_descriptor,
                                       boolean_t b_unit_start, boolean_t b_packet_lost )
{
1252 1253
    int i_data_offset;    /* Offset of the interesting data in the TS packet */
    u16 i_data_length;                               /* Length of those data */
Benoit Steiner's avatar
 
Benoit Steiner committed
1254
    //boolean_t b_first_section; /* Was there another section in the TS packet ? */
1255

Michel Kaempf's avatar
Michel Kaempf committed
1256 1257 1258 1259 1260 1261
    ASSERT(p_input);
    ASSERT(p_ts_packet);
    ASSERT(p_es_descriptor);

#define p_psi (p_es_descriptor->p_psi_section)

1262
    //intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
Michel Kaempf's avatar
Michel Kaempf committed
1263

1264
    //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);
Michel Kaempf's avatar
Michel Kaempf committed
1265 1266


Benoit Steiner's avatar
 
Benoit Steiner committed
1267 1268 1269 1270 1271 1272 1273 1274
    /* Try to find the beginning of the payload in the packet to initialise
       the do-while loop that follows -> Compute the i_data_offset variable:
       by default, the value is set so that we won't enter in the while loop.
       It will be set to a correct value if the data are not corrupted */
    i_data_offset = TS_PACKET_SIZE;

    /* Has the reassembly of a section already began in a previous packet ? */
    if( p_psi->b_running_section )
Michel Kaempf's avatar
Michel Kaempf committed
1275
    {
Benoit Steiner's avatar
 
Benoit Steiner committed
1276 1277
        /* Was data lost since the last TS packet ? */
        if( b_packet_lost )
Michel Kaempf's avatar
Michel Kaempf committed
1278
        {
Benoit Steiner's avatar
 
Benoit Steiner committed
1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
            /* Discard the packet and wait for the begining of a new one to resynch */
            p_psi->b_running_section = 0;
            p_psi->i_current_position = 0;
            intf_DbgMsg( "PSI section(s) discarded due to packet loss\n" );
        }
        else
        {
            /* The data that complete a previously began section are always at
               the beginning of the TS payload... */
            i_data_offset = p_ts_packet->i_payload_start;
            /* ...Unless there is a pointer field, that we have to bypass */
            if( b_unit_start )
                i_data_offset++;
1292
            //intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
Benoit Steiner's avatar
 
Benoit Steiner committed
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
        }
    }
    /* We are looking for the beginning of a new section */
    else
    {
        if( b_unit_start )
        {
            /* Get the offset at which the data for that section can be found
               The offset is stored in the pointer_field since we are interested in
               the first section of the TS packet. Note that the +1 is to bypass
               the pointer field */
            i_data_offset = p_ts_packet->i_payload_start +
                            p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
1306
            //intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
Michel Kaempf's avatar
Michel Kaempf committed
1307 1308 1309
        }
        else
        {
Benoit Steiner's avatar
 
Benoit Steiner committed
1310
            /* This may either mean that the TS is bad or that the packet contains
1311
               the end of a section that had been discarded in a previous loop:
Benoit Steiner's avatar
 
Benoit Steiner committed
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
               trash the TS packet since we cannot do anything with those data: */
            p_psi->b_running_section = 0;
            p_psi->i_current_position = 0;
            intf_DbgMsg( "PSI packet discarded due to lack of synchronisation\n" );
        }
    }

    /* The section we will deal with during the first iteration of the following
       loop is the first one contained in the TS packet */
    //    b_first_section = 1;

    /* Reassemble the pieces of sections contained in the TS packet and decode
       the sections that could have been completed.
       Stop when we reach the end of the packet or stuffing bytes */
    while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF )
    {
        /* If the current section is a new one, reinit the data fields of the p_psi
           struct to start its decoding */
        if( !p_psi->b_running_section )
        {
            /* Read the length of the new section */
            p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
1334
            //intf_DbgMsg( "Section length %d\n", p_psi->i_length );
Benoit Steiner's avatar
 
Benoit Steiner committed
1335
            if( p_psi->i_length > PSI_SECTION_SIZE )
Michel Kaempf's avatar
Michel Kaempf committed
1336
            {
Benoit Steiner's avatar
 
Benoit Steiner committed
1337 1338
                /* The TS packet is corrupted, stop here to avoid possible a seg fault */
                intf_DbgMsg( "PSI Section size is too big, aborting its reception\n" );
Michel Kaempf's avatar
Michel Kaempf committed
1339 1340 1341
                break;
            }

Benoit Steiner's avatar
 
Benoit Steiner committed
1342 1343 1344
            /* Init the reassembly of that section */
            p_psi->b_running_section = 1;
            p_psi->i_current_position = 0;
Michel Kaempf's avatar
Michel Kaempf committed
1345
        }
1346 1347

      /* Compute the length of data related to the section in this TS packet */
Michel Kaempf's avatar
Michel Kaempf committed
1348 1349 1350 1351 1352 1353 1354 1355
        if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
            i_data_length = TS_PACKET_SIZE - i_data_offset;
        else
          i_data_length = p_psi->i_length - p_psi->i_current_position;

        /* Copy those data in the section buffer */
        memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
                i_data_length );
Benoit Steiner's avatar
 
Benoit Steiner committed
1356 1357 1358

        /* Interesting data are now after the ones we copied, since no gap is
           allowed between 2 sections in a TS packets */
Michel Kaempf's avatar
Michel Kaempf committed
1359 1360 1361 1362 1363 1364
        i_data_offset += i_data_length;

        /* Decode the packet if it is now complete */
        if (p_psi->i_length == p_psi->i_current_position + i_data_length)
        {
            /* Packet is complete, decode it */
1365
            //intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
Michel Kaempf's avatar
Michel Kaempf committed
1366 1367 1368 1369 1370
            input_PsiDecode( p_input, p_psi );

            /* Prepare the buffer to receive a new section */
            p_psi->i_current_position = 0;
            p_psi->b_running_section = 0;
1371

Michel Kaempf's avatar
Michel Kaempf committed
1372
            /* The new section won't be the first anymore */
Benoit Steiner's avatar
 
Benoit Steiner committed
1373
            //b_first_section = 0;
Michel Kaempf's avatar
Michel Kaempf committed
1374 1375 1376 1377 1378
        }
        else
        {
            /* Prepare the buffer to receive the next part of the section */
          p_psi->i_current_position += i_data_length;
1379
          //intf_DbgMsg( "Section not complete, waiting for the end\n" );
Michel Kaempf's avatar
Michel Kaempf committed
1380
        }
1381

1382 1383
        //intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
        //             i_data_offset, p_ts_packet->buffer[i_data_offset] );
Michel Kaempf's avatar
Michel Kaempf committed
1384 1385 1386 1387 1388
    }

    /* Relase the TS packet, we don't need it anymore */
    input_NetlistFreeTS( p_input, p_ts_packet );

1389
#undef p_psi
Michel Kaempf's avatar
Michel Kaempf committed
1390
}