1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 1999-2004 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_strings.h>
34 #include <vlc_charset.h>
41 #include "input_internal.h"
43 // #define STREAM_DEBUG 1
46 * - tune the 2 methods (block/stream)
47 * - compute cost for seek
48 * - improve stream mode seeking with closest segments
54 * One linked list of data read
56 * More complex scheme using mutliple track to avoid seeking
57 * - using directly the access (only indirection for peeking).
58 * This method is known to introduce much less latency.
59 * It should probably defaulted (instead of the stream method (2)).
62 /* How many tracks we have, currently only used for stream mode */
63 #ifdef OPTIMIZE_MEMORY
64 # define STREAM_CACHE_TRACK 1
65 /* Max size of our cache 128Ko per track */
66 # define STREAM_CACHE_SIZE (STREAM_CACHE_TRACK*1024*128)
68 # define STREAM_CACHE_TRACK 3
69 /* Max size of our cache 4Mo per track */
70 # define STREAM_CACHE_SIZE (4*STREAM_CACHE_TRACK*1024*1024)
73 /* How many data we try to prebuffer
74 * XXX it should be small to avoid useless latency but big enough for
75 * efficient demux probing */
76 #define STREAM_CACHE_PREBUFFER_SIZE (128)
78 /* Method1: Simple, for pf_block.
79 * We get blocks and put them in the linked list.
80 * We release blocks once the total size is bigger than CACHE_BLOCK_SIZE
83 /* Method2: A bit more complex, for pf_read
84 * - We use ring buffers, only one if unseekable, all if seekable
85 * - Upon seek date current ring, then search if one ring match the pos,
86 * yes: switch to it, seek the access to match the end of the ring
87 * no: search the ring with i_end the closer to i_pos,
88 * if close enough, read data and use this ring
89 * else use the oldest ring, seek and use it.
91 * TODO: - with access non seekable: use all space available for only one ring, but
92 * we have to support seekable/non-seekable switch on the fly.
93 * - compute a good value for i_read_size
96 #define STREAM_READ_ATONCE 1024
97 #define STREAM_CACHE_TRACK_SIZE (STREAM_CACHE_SIZE/STREAM_CACHE_TRACK)
121 } stream_read_method_t;
127 stream_read_method_t method; /* method to use */
129 int64_t i_pos; /* Current reading offset */
131 /* Method 1: pf_block */
134 int64_t i_start; /* Offset of block for p_first */
135 int64_t i_offset; /* Offset for data in p_current */
136 block_t *p_current; /* Current block */
138 int i_size; /* Total amount of data in the list */
144 /* Method 2: for pf_read */
147 int i_offset; /* Buffer offset in the current track */
148 int i_tk; /* Current track */
149 stream_track_t tk[STREAM_CACHE_TRACK];
155 int i_used; /* Used since last read */
160 /* Peek temporary buffer */
164 /* Stat for both method */
167 bool b_fastseek; /* From access */
169 /* Stat about reading data */
170 int64_t i_read_count;
174 /* Stat about seek */
182 access_entry_t **list;
184 access_t *p_list_access;
188 static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read );
189 static int AStreamPeekBlock( stream_t *s, const uint8_t **p_peek, unsigned int i_read );
190 static int AStreamSeekBlock( stream_t *s, int64_t i_pos );
191 static void AStreamPrebufferBlock( stream_t *s );
192 static block_t *AReadBlock( stream_t *s, bool *pb_eof );
195 static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read );
196 static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read );
197 static int AStreamSeekStream( stream_t *s, int64_t i_pos );
198 static void AStreamPrebufferStream( stream_t *s );
199 static int AReadStream( stream_t *s, void *p_read, unsigned int i_read );
202 static int AStreamControl( stream_t *s, int i_query, va_list );
203 static void AStreamDestroy( stream_t *s );
204 static void UStreamDestroy( stream_t *s );
205 static int ASeek( stream_t *s, int64_t i_pos );
207 /****************************************************************************
208 * stream_CommonNew: create an empty stream structure
209 ****************************************************************************/
210 stream_t *stream_CommonNew( vlc_object_t *p_obj )
212 stream_t *s = (stream_t *)vlc_custom_create( p_obj, sizeof(*s),
213 VLC_OBJECT_GENERIC, "stream" );
218 s->p_text = malloc( sizeof(*s->p_text) );
221 vlc_object_release( s );
225 /* UTF16 and UTF32 text file conversion */
226 s->p_text->conv = (vlc_iconv_t)(-1);
227 s->p_text->i_char_width = 1;
228 s->p_text->b_little_endian = false;
233 void stream_CommonDelete( stream_t *s )
237 if( s->p_text->conv != (vlc_iconv_t)(-1) )
238 vlc_iconv_close( s->p_text->conv );
242 vlc_object_release( s );
245 /****************************************************************************
246 * stream_UrlNew: create a stream from a access
247 ****************************************************************************/
248 stream_t *__stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
250 const char *psz_access, *psz_demux;
258 char psz_dup[strlen( psz_url ) + 1];
259 strcpy( psz_dup, psz_url );
260 input_SplitMRL( &psz_access, &psz_demux, &psz_path, psz_dup );
262 /* Get a weak link to the parent input */
263 /* FIXME: This should probably be removed in favor of a NULL input. */
264 input_thread_t *p_input = (input_thread_t *)vlc_object_find( p_parent, VLC_OBJECT_INPUT, FIND_PARENT );
266 /* Now try a real access */
267 p_access = access_New( p_parent, p_input, psz_access, psz_demux, psz_path );
270 vlc_object_release((vlc_object_t*)p_input);
272 if( p_access == NULL )
274 msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
278 if( !( p_res = stream_AccessNew( p_access, NULL ) ) )
280 access_Delete( p_access );
284 p_res->pf_destroy = UStreamDestroy;
288 stream_t *stream_AccessNew( access_t *p_access, char **ppsz_list )
290 stream_t *s = stream_CommonNew( VLC_OBJECT(p_access) );
296 s->p_input = p_access->p_input;
297 s->psz_path = strdup( p_access->psz_path );
298 s->p_sys = p_sys = malloc( sizeof( *p_sys ) );
299 if( !s->psz_path || !s->p_sys )
301 stream_CommonDelete( s );
305 /* Attach it now, needed for b_die */
306 vlc_object_attach( s, p_access );
308 s->pf_read = NULL; /* Set up later */
310 s->pf_control = AStreamControl;
311 s->pf_destroy = AStreamDestroy;
314 p_sys->p_access = p_access;
315 if( p_access->pf_block )
316 p_sys->method = STREAM_METHOD_BLOCK;
318 p_sys->method = STREAM_METHOD_STREAM;
320 p_sys->i_pos = p_access->info.i_pos;
323 access_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
324 p_sys->stat.i_bytes = 0;
325 p_sys->stat.i_read_time = 0;
326 p_sys->stat.i_read_count = 0;
327 p_sys->stat.i_seek_count = 0;
328 p_sys->stat.i_seek_time = 0;
330 TAB_INIT( p_sys->i_list, p_sys->list );
331 p_sys->i_list_index = 0;
332 p_sys->p_list_access = NULL;
334 /* Get the additional list of inputs if any (for concatenation) */
335 if( ppsz_list && ppsz_list[0] )
337 access_entry_t *p_entry = malloc( sizeof(*p_entry) );
341 p_entry->i_size = p_access->info.i_size;
342 p_entry->psz_path = strdup( p_access->psz_path );
343 if( !p_entry->psz_path )
348 p_sys->p_list_access = p_access;
349 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
350 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
351 p_entry->psz_path, p_access->info.i_size );
353 for( int i = 0; ppsz_list[i] != NULL; i++ )
355 char *psz_name = strdup( ppsz_list[i] );
360 access_t *p_tmp = access_New( p_access, p_access->p_input,
361 p_access->psz_access, "", psz_name );
365 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
366 psz_name, p_tmp->info.i_size );
368 p_entry = malloc( sizeof(*p_entry) );
371 p_entry->i_size = p_tmp->info.i_size;
372 p_entry->psz_path = psz_name;
373 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
375 access_Delete( p_tmp );
381 p_sys->p_peek = NULL;
383 if( p_sys->method == STREAM_METHOD_BLOCK )
385 msg_Dbg( s, "Using AStream*Block" );
386 s->pf_read = AStreamReadBlock;
387 s->pf_peek = AStreamPeekBlock;
389 /* Init all fields of p_sys->block */
390 p_sys->block.i_start = p_sys->i_pos;
391 p_sys->block.i_offset = 0;
392 p_sys->block.p_current = NULL;
393 p_sys->block.i_size = 0;
394 p_sys->block.p_first = NULL;
395 p_sys->block.pp_last = &p_sys->block.p_first;
397 /* Do the prebuffering */
398 AStreamPrebufferBlock( s );
400 if( p_sys->block.i_size <= 0 )
402 msg_Err( s, "cannot pre fill buffer" );
410 assert( p_sys->method == STREAM_METHOD_STREAM );
412 msg_Dbg( s, "Using AStream*Stream" );
414 s->pf_read = AStreamReadStream;
415 s->pf_peek = AStreamPeekStream;
417 /* Allocate/Setup our tracks */
418 p_sys->stream.i_offset = 0;
419 p_sys->stream.i_tk = 0;
420 p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
421 if( p_sys->stream.p_buffer == NULL )
423 p_sys->stream.i_used = 0;
424 p_sys->stream.i_read_size = STREAM_READ_ATONCE;
425 #if STREAM_READ_ATONCE < 256
426 # error "Invalid STREAM_READ_ATONCE value"
429 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
431 p_sys->stream.tk[i].i_date = 0;
432 p_sys->stream.tk[i].i_start = p_sys->i_pos;
433 p_sys->stream.tk[i].i_end = p_sys->i_pos;
434 p_sys->stream.tk[i].p_buffer=
435 &p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
438 /* Do the prebuffering */
439 AStreamPrebufferStream( s );
441 if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
443 msg_Err( s, "cannot pre fill buffer" );
451 if( p_sys->method == STREAM_METHOD_BLOCK )
457 free( p_sys->stream.p_buffer );
459 while( p_sys->i_list > 0 )
460 free( p_sys->list[--(p_sys->i_list)] );
463 vlc_object_detach( s );
464 stream_CommonDelete( s );
468 /****************************************************************************
470 ****************************************************************************/
471 static void AStreamDestroy( stream_t *s )
473 stream_sys_t *p_sys = s->p_sys;
475 vlc_object_detach( s );
477 if( p_sys->method == STREAM_METHOD_BLOCK )
478 block_ChainRelease( p_sys->block.p_first );
480 free( p_sys->stream.p_buffer );
482 free( p_sys->p_peek );
484 if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
485 access_Delete( p_sys->p_list_access );
487 while( p_sys->i_list-- )
489 free( p_sys->list[p_sys->i_list]->psz_path );
490 free( p_sys->list[p_sys->i_list] );
496 stream_CommonDelete( s );
499 static void UStreamDestroy( stream_t *s )
501 access_t *p_access = (access_t *)s->p_parent;
503 access_Delete( p_access );
506 /****************************************************************************
507 * AStreamControlReset:
508 ****************************************************************************/
509 static void AStreamControlReset( stream_t *s )
511 stream_sys_t *p_sys = s->p_sys;
513 p_sys->i_pos = p_sys->p_access->info.i_pos;
515 if( p_sys->method == STREAM_METHOD_BLOCK )
517 block_ChainRelease( p_sys->block.p_first );
519 /* Init all fields of p_sys->block */
520 p_sys->block.i_start = p_sys->i_pos;
521 p_sys->block.i_offset = 0;
522 p_sys->block.p_current = NULL;
523 p_sys->block.i_size = 0;
524 p_sys->block.p_first = NULL;
525 p_sys->block.pp_last = &p_sys->block.p_first;
527 /* Do the prebuffering */
528 AStreamPrebufferBlock( s );
534 assert( p_sys->method == STREAM_METHOD_STREAM );
536 /* Setup our tracks */
537 p_sys->stream.i_offset = 0;
538 p_sys->stream.i_tk = 0;
539 p_sys->stream.i_used = 0;
541 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
543 p_sys->stream.tk[i].i_date = 0;
544 p_sys->stream.tk[i].i_start = p_sys->i_pos;
545 p_sys->stream.tk[i].i_end = p_sys->i_pos;
548 /* Do the prebuffering */
549 AStreamPrebufferStream( s );
553 /****************************************************************************
554 * AStreamControlUpdate:
555 ****************************************************************************/
556 static void AStreamControlUpdate( stream_t *s )
558 stream_sys_t *p_sys = s->p_sys;
560 p_sys->i_pos = p_sys->p_access->info.i_pos;
565 for( i = 0; i < p_sys->i_list_index; i++ )
567 p_sys->i_pos += p_sys->list[i]->i_size;
572 /****************************************************************************
574 ****************************************************************************/
575 static int AStreamControl( stream_t *s, int i_query, va_list args )
577 stream_sys_t *p_sys = s->p_sys;
578 access_t *p_access = p_sys->p_access;
581 int64_t *pi_64, i_64;
586 case STREAM_GET_SIZE:
587 pi_64 = (int64_t*)va_arg( args, int64_t * );
588 if( s->p_sys->i_list )
592 for( i = 0; i < s->p_sys->i_list; i++ )
593 *pi_64 += s->p_sys->list[i]->i_size;
596 *pi_64 = p_access->info.i_size;
599 case STREAM_CAN_SEEK:
600 p_bool = (bool*)va_arg( args, bool * );
601 access_Control( p_access, ACCESS_CAN_SEEK, p_bool );
604 case STREAM_CAN_FASTSEEK:
605 p_bool = (bool*)va_arg( args, bool * );
606 access_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
609 case STREAM_GET_POSITION:
610 pi_64 = (int64_t*)va_arg( args, int64_t * );
611 *pi_64 = p_sys->i_pos;
614 case STREAM_SET_POSITION:
615 i_64 = (int64_t)va_arg( args, int64_t );
616 switch( p_sys->method )
618 case STREAM_METHOD_BLOCK:
619 return AStreamSeekBlock( s, i_64 );
620 case STREAM_METHOD_STREAM:
621 return AStreamSeekStream( s, i_64 );
627 case STREAM_CONTROL_ACCESS:
629 i_int = (int) va_arg( args, int );
630 if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
631 i_int != ACCESS_SET_PRIVATE_ID_CA &&
632 i_int != ACCESS_GET_PRIVATE_ID_STATE &&
633 i_int != ACCESS_SET_TITLE &&
634 i_int != ACCESS_SET_SEEKPOINT )
636 msg_Err( s, "Hey, what are you thinking ?"
637 "DON'T USE STREAM_CONTROL_ACCESS !!!" );
640 int i_ret = access_vaControl( p_access, i_int, args );
641 if( i_int == ACCESS_SET_TITLE || i_int == ACCESS_SET_SEEKPOINT )
642 AStreamControlReset( s );
646 case STREAM_UPDATE_SIZE:
647 AStreamControlUpdate( s );
650 case STREAM_GET_CONTENT_TYPE:
651 return access_Control( p_access, ACCESS_GET_CONTENT_TYPE,
652 va_arg( args, char ** ) );
653 case STREAM_SET_RECORD_STATE:
655 msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
661 /****************************************************************************
663 ****************************************************************************/
664 static void AStreamPrebufferBlock( stream_t *s )
666 stream_sys_t *p_sys = s->p_sys;
671 msg_Dbg( s, "pre buffering" );
675 const int64_t i_date = mdate();
679 if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE )
684 p_sys->stat.i_bytes = p_sys->block.i_size;
685 p_sys->stat.i_read_time = i_date - i_start;
686 i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
687 (p_sys->stat.i_read_time + 1);
689 msg_Dbg( s, "prebuffering done %"PRId64" bytes in %"PRId64"s - "
690 "%"PRId64" kbytes/s",
692 p_sys->stat.i_read_time / INT64_C(1000000),
698 if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
707 /* Append the block */
708 p_sys->block.i_size += b->i_buffer;
709 *p_sys->block.pp_last = b;
710 p_sys->block.pp_last = &b->p_next;
712 p_sys->stat.i_read_count++;
719 msg_Dbg( s, "received first data after %d ms",
720 (int)((i_first-i_start)/1000) );
724 p_sys->block.p_current = p_sys->block.p_first;
727 static int AStreamRefillBlock( stream_t *s );
729 static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read )
731 stream_sys_t *p_sys = s->p_sys;
733 uint8_t *p_data = p_read;
734 unsigned int i_data = 0;
737 if( p_sys->block.p_current == NULL )
742 /* seek within this stream if possible, else use plain old read and discard */
743 stream_sys_t *p_sys = s->p_sys;
744 access_t *p_access = p_sys->p_access;
746 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
748 return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
751 while( i_data < i_read )
754 p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
755 unsigned int i_copy = __MIN( (unsigned int)__MAX(i_current,0), i_read - i_data);
761 &p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
767 p_sys->block.i_offset += i_copy;
768 if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
770 /* Current block is now empty, switch to next */
771 if( p_sys->block.p_current )
773 p_sys->block.i_offset = 0;
774 p_sys->block.p_current = p_sys->block.p_current->p_next;
776 /*Get a new block if needed */
777 if( !p_sys->block.p_current && AStreamRefillBlock( s ) )
784 p_sys->i_pos += i_data;
788 static int AStreamPeekBlock( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
790 stream_sys_t *p_sys = s->p_sys;
792 unsigned int i_data = 0;
794 unsigned int i_offset;
796 if( p_sys->block.p_current == NULL ) return 0; /* EOF */
798 /* We can directly give a pointer over our buffer */
799 if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
801 *pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
805 /* We need to create a local copy */
806 if( p_sys->i_peek < i_read )
808 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
814 p_sys->i_peek = i_read;
817 /* Fill enough data */
818 while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
821 block_t **pp_last = p_sys->block.pp_last;
823 if( AStreamRefillBlock( s ) ) break;
825 /* Our buffer are probably filled enough, don't try anymore */
826 if( pp_last == p_sys->block.pp_last ) break;
829 /* Copy what we have */
830 b = p_sys->block.p_current;
831 i_offset = p_sys->block.i_offset;
832 p_data = p_sys->p_peek;
834 while( b && i_data < i_read )
836 unsigned int i_current = __MAX(b->i_buffer - i_offset,0);
837 int i_copy = __MIN( i_current, i_read - i_data );
839 memcpy( p_data, &b->p_buffer[i_offset], i_copy );
844 if( i_offset >= b->i_buffer )
851 *pp_peek = p_sys->p_peek;
855 static int AStreamSeekBlock( stream_t *s, int64_t i_pos )
857 stream_sys_t *p_sys = s->p_sys;
858 access_t *p_access = p_sys->p_access;
859 int64_t i_offset = i_pos - p_sys->block.i_start;
862 /* We already have thoses data, just update p_current/i_offset */
863 if( i_offset >= 0 && i_offset < p_sys->block.i_size )
865 block_t *b = p_sys->block.p_first;
868 while( i_current + b->i_buffer < i_offset )
870 i_current += b->i_buffer;
874 p_sys->block.p_current = b;
875 p_sys->block.i_offset = i_offset - i_current;
877 p_sys->i_pos = i_pos;
882 /* We may need to seek or to read data */
886 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
890 msg_Err( s, "backward seeking impossible (access not seekable)" );
898 bool b_aseek, b_aseekfast;
900 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
901 access_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
906 msg_Warn( s, "%"PRId64" bytes need to be skipped "
907 "(access non seekable)",
908 i_offset - p_sys->block.i_size );
912 int64_t i_skip = i_offset - p_sys->block.i_size;
914 /* Avg bytes per packets */
915 int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
916 /* TODO compute a seek cost instead of fixed threshold */
917 int i_th = b_aseekfast ? 1 : 5;
919 if( i_skip <= i_th * i_avg &&
920 i_skip < STREAM_CACHE_SIZE )
925 msg_Dbg( s, "b_seek=%d th*avg=%d skip=%"PRId64,
926 b_seek, i_th*i_avg, i_skip );
932 int64_t i_start, i_end;
933 /* Do the access seek */
935 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
939 block_ChainRelease( p_sys->block.p_first );
942 p_sys->block.i_start = p_sys->i_pos = i_pos;
943 p_sys->block.i_offset = 0;
944 p_sys->block.p_current = NULL;
945 p_sys->block.i_size = 0;
946 p_sys->block.p_first = NULL;
947 p_sys->block.pp_last = &p_sys->block.p_first;
950 if( AStreamRefillBlock( s ) )
954 p_sys->stat.i_seek_time += i_end - i_start;
955 p_sys->stat.i_seek_count++;
962 /* Read and skip enough data */
963 if( AStreamRefillBlock( s ) )
966 while( p_sys->block.p_current &&
967 p_sys->i_pos + p_sys->block.p_current->i_buffer - p_sys->block.i_offset < i_pos )
969 p_sys->i_pos += p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
970 p_sys->block.p_current = p_sys->block.p_current->p_next;
971 p_sys->block.i_offset = 0;
974 while( p_sys->block.i_start + p_sys->block.i_size < i_pos );
976 p_sys->block.i_offset += i_pos - p_sys->i_pos;
977 p_sys->i_pos = i_pos;
985 static int AStreamRefillBlock( stream_t *s )
987 stream_sys_t *p_sys = s->p_sys;
991 while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
992 p_sys->block.p_first != p_sys->block.p_current )
994 block_t *b = p_sys->block.p_first;
996 p_sys->block.i_start += b->i_buffer;
997 p_sys->block.i_size -= b->i_buffer;
998 p_sys->block.p_first = b->p_next;
1002 if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
1003 p_sys->block.p_current == p_sys->block.p_first &&
1004 p_sys->block.p_current->p_next ) /* At least 2 packets */
1006 /* Enough data, don't read more */
1010 /* Now read a new block */
1011 const int64_t i_start = mdate();
1017 return VLC_EGENERIC;
1020 if( ( b = AReadBlock( s, &b_eof ) ) )
1023 return VLC_EGENERIC;
1026 p_sys->stat.i_read_time += mdate() - i_start;
1029 /* Append the block */
1030 p_sys->block.i_size += b->i_buffer;
1031 *p_sys->block.pp_last = b;
1032 p_sys->block.pp_last = &b->p_next;
1035 if( p_sys->block.p_current == NULL )
1036 p_sys->block.p_current = b;
1039 p_sys->stat.i_bytes += b->i_buffer;
1040 p_sys->stat.i_read_count++;
1048 /****************************************************************************
1050 ****************************************************************************/
1051 static int AStreamRefillStream( stream_t *s );
1052 static int AStreamReadNoSeekStream( stream_t *s, void *p_read, unsigned int i_read );
1054 static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read )
1056 stream_sys_t *p_sys = s->p_sys;
1060 const int64_t i_pos_wanted = p_sys->i_pos + i_read;
1062 if( AStreamSeekStream( s, i_pos_wanted ) )
1064 if( p_sys->i_pos != i_pos_wanted )
1069 return AStreamReadNoSeekStream( s, p_read, i_read );
1072 static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
1074 stream_sys_t *p_sys = s->p_sys;
1075 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1078 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
1081 msg_Dbg( s, "AStreamPeekStream: %d pos=%"PRId64" tk=%d "
1082 "start=%"PRId64" offset=%d end=%"PRId64,
1083 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1084 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1087 /* Avoid problem, but that should *never* happen */
1088 if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
1089 i_read = STREAM_CACHE_TRACK_SIZE / 2;
1091 while( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1093 if( p_sys->stream.i_used <= 1 )
1095 /* Be sure we will read something */
1096 p_sys->stream.i_used += i_read -
1097 (tk->i_end - tk->i_start - p_sys->stream.i_offset);
1099 if( AStreamRefillStream( s ) ) break;
1102 if( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1103 i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
1105 /* Now, direct pointer or a copy ? */
1106 i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1107 if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
1109 *pp_peek = &tk->p_buffer[i_off];
1113 if( p_sys->i_peek < i_read )
1115 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
1116 if( !p_sys->p_peek )
1121 p_sys->i_peek = i_read;
1124 memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
1125 STREAM_CACHE_TRACK_SIZE - i_off );
1126 memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
1127 &tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
1129 *pp_peek = p_sys->p_peek;
1133 static int AStreamSeekStream( stream_t *s, int64_t i_pos )
1135 stream_sys_t *p_sys = s->p_sys;
1137 stream_track_t *p_current = &p_sys->stream.tk[p_sys->stream.i_tk];
1138 access_t *p_access = p_sys->p_access;
1140 if( p_current->i_start >= p_current->i_end && i_pos >= p_current->i_end )
1144 msg_Dbg( s, "AStreamSeekStream: to %"PRId64" pos=%"PRId64
1145 " tk=%d start=%"PRId64" offset=%d end=%"PRId64,
1146 i_pos, p_sys->i_pos, p_sys->stream.i_tk,
1148 p_sys->stream.i_offset,
1153 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1154 if( !b_aseek && i_pos < p_current->i_start )
1156 msg_Warn( s, "AStreamSeekStream: can't seek" );
1157 return VLC_EGENERIC;
1161 access_Control( p_access, ACCESS_CAN_SEEK, &b_afastseek );
1163 /* FIXME compute seek cost (instead of static 'stupid' value) */
1164 int64_t i_skip_threshold;
1166 i_skip_threshold = b_afastseek ? 128 : 3*p_sys->stream.i_read_size;
1168 i_skip_threshold = INT64_MAX;
1170 /* Date the current track */
1171 p_current->i_date = mdate();
1173 /* Search a new track slot */
1174 stream_track_t *tk = NULL;
1177 /* Prefer the current track */
1178 if( p_current->i_start <= i_pos && i_pos - p_current->i_end <= i_skip_threshold )
1181 i_tk_idx = p_sys->stream.i_tk;
1185 /* Try to maximize already read data */
1186 for( int i = 0; i < STREAM_CACHE_TRACK; i++ )
1188 stream_track_t *t = &p_sys->stream.tk[i];
1190 if( t->i_start > i_pos || i_pos > t->i_end )
1193 if( !tk || tk->i_end < t->i_end )
1202 /* Use the oldest unused */
1203 for( int i = 0; i < STREAM_CACHE_TRACK; i++ )
1205 stream_track_t *t = &p_sys->stream.tk[i];
1207 if( !tk || tk->i_date > t->i_date )
1214 assert( i_tk_idx >= 0 && i_tk_idx < STREAM_CACHE_TRACK );
1216 if( tk != p_current )
1217 i_skip_threshold = 0;
1218 if( tk->i_start <= i_pos && i_pos - tk->i_end <= i_skip_threshold )
1221 msg_Err( s, "AStreamSeekStream: reusing %d start=%"PRId64
1222 " end=%"PRId64"(%s)",
1223 i_tk_idx, tk->i_start, tk->i_end,
1224 tk != p_current ? "seek" : i_pos > tk->i_end ? "skip" : "noseek" );
1226 if( tk != p_current )
1230 /* Seek at the end of the buffer
1231 * TODO it is stupid to seek now, it would be better to delay it
1233 if( ASeek( s, tk->i_end ) )
1234 return VLC_EGENERIC;
1238 int64_t i_skip = i_pos - tk->i_end;
1241 const int i_read_max = __MIN( 10 * STREAM_READ_ATONCE, i_skip );
1242 if( AStreamReadNoSeekStream( s, NULL, i_read_max ) != i_read_max )
1243 return VLC_EGENERIC;
1244 i_skip -= i_read_max;
1251 msg_Err( s, "AStreamSeekStream: hard seek" );
1253 /* Nothing good, seek and choose oldest segment */
1254 if( ASeek( s, i_pos ) )
1255 return VLC_EGENERIC;
1257 tk->i_start = i_pos;
1260 p_sys->stream.i_offset = i_pos - tk->i_start;
1261 p_sys->stream.i_tk = i_tk_idx;
1262 p_sys->i_pos = i_pos;
1264 /* If there is not enough data left in the track, refill */
1265 /* TODO How to get a correct value for
1266 * - refilling threshold
1267 * - how much to refill
1269 if( (tk->i_end - tk->i_start) - p_sys->stream.i_offset < p_sys->stream.i_read_size )
1271 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1272 p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
1274 if( AStreamRefillStream( s ) && i_pos == tk->i_end )
1275 return VLC_EGENERIC;
1280 static int AStreamReadNoSeekStream( stream_t *s, void *p_read, unsigned int i_read )
1282 stream_sys_t *p_sys = s->p_sys;
1283 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1285 uint8_t *p_data = (uint8_t *)p_read;
1286 unsigned int i_data = 0;
1288 if( tk->i_start >= tk->i_end )
1292 msg_Dbg( s, "AStreamReadStream: %d pos=%"PRId64" tk=%d start=%"PRId64
1293 " offset=%d end=%"PRId64,
1294 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1295 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1298 while( i_data < i_read )
1300 int i_off = (tk->i_start + p_sys->stream.i_offset) %
1301 STREAM_CACHE_TRACK_SIZE;
1302 unsigned int i_current =
1303 __MAX(0,__MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
1304 STREAM_CACHE_TRACK_SIZE - i_off ));
1305 int i_copy = __MIN( i_current, i_read - i_data );
1307 if( i_copy <= 0 ) break; /* EOF */
1310 /* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
1313 memcpy( p_data, &tk->p_buffer[i_off], i_copy );
1317 p_sys->stream.i_offset += i_copy;
1319 /* Update pos now */
1320 p_sys->i_pos += i_copy;
1323 p_sys->stream.i_used += i_copy;
1325 if( tk->i_end - tk->i_start - p_sys->stream.i_offset <= i_read -i_data )
1327 const int i_read_requested = __MAX( __MIN( i_read - i_data,
1328 STREAM_READ_ATONCE * 10 ),
1329 STREAM_READ_ATONCE / 2 );
1331 if( p_sys->stream.i_used < i_read_requested )
1332 p_sys->stream.i_used = i_read_requested;
1334 if( AStreamRefillStream( s ) )
1337 if( tk->i_start >= tk->i_end ) break;
1346 static int AStreamRefillStream( stream_t *s )
1348 stream_sys_t *p_sys = s->p_sys;
1349 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1351 /* We read but won't increase i_start after initial start + offset */
1353 __MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
1354 (tk->i_end - tk->i_start - p_sys->stream.i_offset) );
1355 bool b_read = false;
1356 int64_t i_start, i_stop;
1358 if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
1361 msg_Dbg( s, "AStreamRefillStream: used=%d toread=%d",
1362 p_sys->stream.i_used, i_toread );
1366 while( i_toread > 0 )
1368 int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
1372 return VLC_EGENERIC;
1374 i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
1375 i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
1377 /* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
1382 else if( i_read == 0 )
1385 return VLC_EGENERIC;
1391 tk->i_end += i_read;
1393 /* Windows of STREAM_CACHE_TRACK_SIZE */
1394 if( tk->i_end - tk->i_start > STREAM_CACHE_TRACK_SIZE )
1396 int i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
1398 tk->i_start += i_invalid;
1399 p_sys->stream.i_offset -= i_invalid;
1403 p_sys->stream.i_used -= i_read;
1405 p_sys->stat.i_bytes += i_read;
1406 p_sys->stat.i_read_count++;
1410 p_sys->stat.i_read_time += i_stop - i_start;
1415 static void AStreamPrebufferStream( stream_t *s )
1417 stream_sys_t *p_sys = s->p_sys;
1419 int64_t i_first = 0;
1422 msg_Dbg( s, "pre buffering" );
1426 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1428 int64_t i_date = mdate();
1431 if( s->b_die || tk->i_end >= STREAM_CACHE_PREBUFFER_SIZE )
1436 p_sys->stat.i_bytes = tk->i_end - tk->i_start;
1437 p_sys->stat.i_read_time = i_date - i_start;
1438 i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
1439 (p_sys->stat.i_read_time+1);
1441 msg_Dbg( s, "pre-buffering done %"PRId64" bytes in %"PRId64"s - "
1442 "%"PRId64" kbytes/s",
1443 p_sys->stat.i_bytes,
1444 p_sys->stat.i_read_time / INT64_C(1000000),
1445 i_byterate / 1024 );
1450 i_read = STREAM_CACHE_TRACK_SIZE - tk->i_end;
1451 i_read = __MIN( p_sys->stream.i_read_size, i_read );
1452 i_read = AReadStream( s, &tk->p_buffer[tk->i_end], i_read );
1455 else if( i_read == 0 )
1461 msg_Dbg( s, "received first data after %d ms",
1462 (int)((i_first-i_start)/1000) );
1465 tk->i_end += i_read;
1467 p_sys->stat.i_read_count++;
1471 /****************************************************************************
1473 ****************************************************************************/
1475 * Read from the stream untill first newline.
1476 * \param s Stream handle to read from
1477 * \return A pointer to the allocated output string. You need to free this when you are done.
1479 #define STREAM_PROBE_LINE 2048
1480 #define STREAM_LINE_MAX (2048*100)
1481 char *stream_ReadLine( stream_t *s )
1483 char *p_line = NULL;
1484 int i_line = 0, i_read = 0;
1486 while( i_read < STREAM_LINE_MAX )
1489 const uint8_t *p_data;
1493 /* Probe new data */
1494 i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
1495 if( i_data <= 0 ) break; /* No more data */
1498 i_pos = stream_Tell( s );
1499 if( i_pos == 0 && i_data >= 3 )
1502 const char *psz_encoding = NULL;
1504 if( !memcmp( p_data, "\xEF\xBB\xBF", 3 ) )
1506 psz_encoding = "UTF-8";
1509 else if( !memcmp( p_data, "\xFF\xFE", 2 ) )
1511 psz_encoding = "UTF-16LE";
1512 s->p_text->b_little_endian = true;
1513 s->p_text->i_char_width = 2;
1516 else if( !memcmp( p_data, "\xFE\xFF", 2 ) )
1518 psz_encoding = "UTF-16BE";
1519 s->p_text->i_char_width = 2;
1523 /* Seek past the BOM */
1526 stream_Seek( s, i_bom_size );
1527 p_data += i_bom_size;
1528 i_data -= i_bom_size;
1531 /* Open the converter if we need it */
1532 if( psz_encoding != NULL )
1534 msg_Dbg( s, "%s BOM detected", psz_encoding );
1535 if( s->p_text->i_char_width > 1 )
1537 s->p_text->conv = vlc_iconv_open( "UTF-8", psz_encoding );
1538 if( s->p_text->conv == (vlc_iconv_t)-1 )
1540 msg_Err( s, "iconv_open failed" );
1544 /* FIXME that's UGLY */
1545 input_thread_t *p_input = s->p_input;
1546 if( p_input != NULL)
1548 var_Create( p_input, "subsdec-encoding", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
1549 var_SetString( p_input, "subsdec-encoding", "UTF-8" );
1550 vlc_object_release( p_input );
1555 if( i_data % s->p_text->i_char_width )
1557 /* keep i_char_width boundary */
1558 i_data = i_data - ( i_data % s->p_text->i_char_width );
1559 msg_Warn( s, "the read is not i_char_width compatible");
1565 /* Check if there is an EOL */
1566 if( s->p_text->i_char_width == 1 )
1568 /* UTF-8: 0A <LF> */
1569 psz_eol = memchr( p_data, '\n', i_data );
1573 const uint8_t *p = p_data;
1574 const uint8_t *p_last = p + i_data - s->p_text->i_char_width;
1576 if( s->p_text->i_char_width == 2 )
1578 if( s->p_text->b_little_endian == true)
1580 /* UTF-16LE: 0A 00 <LF> */
1581 while( p <= p_last && ( p[0] != 0x0A || p[1] != 0x00 ) )
1586 /* UTF-16BE: 00 0A <LF> */
1587 while( p <= p_last && ( p[1] != 0x0A || p[0] != 0x00 ) )
1598 psz_eol = (char *)p + ( s->p_text->i_char_width - 1 );
1604 i_data = (psz_eol - (char *)p_data) + 1;
1605 p_line = realloc( p_line, i_line + i_data + s->p_text->i_char_width ); /* add \0 */
1608 i_data = stream_Read( s, &p_line[i_line], i_data );
1609 if( i_data <= 0 ) break; /* Hmmm */
1610 i_line += i_data - s->p_text->i_char_width; /* skip \n */;
1613 /* We have our line */
1617 /* Read data (+1 for easy \0 append) */
1618 p_line = realloc( p_line, i_line + STREAM_PROBE_LINE + s->p_text->i_char_width );
1621 i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
1622 if( i_data <= 0 ) break; /* Hmmm */
1630 for( j = 0; j < s->p_text->i_char_width; j++ )
1632 p_line[i_line + j] = '\0';
1634 i_line += s->p_text->i_char_width; /* the added \0 */
1635 if( s->p_text->i_char_width > 1 )
1637 size_t i_in = 0, i_out = 0;
1638 const char * p_in = NULL;
1639 char * p_out = NULL;
1640 char * psz_new_line = NULL;
1643 psz_new_line = malloc( i_line );
1644 if( psz_new_line == NULL )
1646 i_in = i_out = (size_t)i_line;
1648 p_out = psz_new_line;
1650 if( vlc_iconv( s->p_text->conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
1652 msg_Err( s, "iconv failed" );
1653 msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
1656 p_line = psz_new_line;
1657 i_line = (size_t)i_line - i_out; /* does not include \0 */
1660 /* Remove trailing LF/CR */
1661 while( i_line >= 2 && ( p_line[i_line-2] == '\r' ||
1662 p_line[i_line-2] == '\n') ) i_line--;
1664 /* Make sure the \0 is there */
1665 p_line[i_line-1] = '\0';
1671 /* We failed to read any data, probably EOF */
1675 if( s->p_text->conv != (vlc_iconv_t)(-1) )
1676 vlc_iconv_close( s->p_text->conv );
1677 s->p_text->conv = (vlc_iconv_t)(-1);
1681 /****************************************************************************
1682 * Access reading/seeking wrappers to handle concatenated streams.
1683 ****************************************************************************/
1684 static int AReadStream( stream_t *s, void *p_read, unsigned int i_read )
1686 stream_sys_t *p_sys = s->p_sys;
1687 access_t *p_access = p_sys->p_access;
1688 input_thread_t *p_input = NULL;
1689 int i_read_orig = i_read;
1692 if( s->p_parent && s->p_parent->p_parent &&
1693 vlc_internals( s->p_parent->p_parent )->i_object_type == VLC_OBJECT_INPUT )
1694 p_input = (input_thread_t *)s->p_parent->p_parent;
1696 if( !p_sys->i_list )
1698 i_read = p_access->pf_read( p_access, p_read, i_read );
1699 if( p_access->b_die )
1700 vlc_object_kill( s );
1703 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1704 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read,
1706 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1707 (float)i_total, NULL );
1708 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1709 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1714 i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
1716 if( p_access->b_die )
1717 vlc_object_kill( s );
1719 /* If we reached an EOF then switch to the next stream in the list */
1720 if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
1722 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1723 access_t *p_list_access;
1725 msg_Dbg( s, "opening input `%s'", psz_name );
1727 p_list_access = access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1729 if( !p_list_access ) return 0;
1731 if( p_sys->p_list_access != p_access )
1732 access_Delete( p_sys->p_list_access );
1734 p_sys->p_list_access = p_list_access;
1736 /* We have to read some data */
1737 return AReadStream( s, p_read, i_read_orig );
1740 /* Update read bytes in input */
1743 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1744 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read, &i_total );
1745 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1746 (float)i_total, NULL );
1747 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1748 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1753 static block_t *AReadBlock( stream_t *s, bool *pb_eof )
1755 stream_sys_t *p_sys = s->p_sys;
1756 access_t *p_access = p_sys->p_access;
1757 input_thread_t *p_input = NULL;
1762 if( s->p_parent && s->p_parent->p_parent &&
1763 vlc_internals( s->p_parent->p_parent )->i_object_type == VLC_OBJECT_INPUT )
1764 p_input = (input_thread_t *)s->p_parent->p_parent;
1766 if( !p_sys->i_list )
1768 p_block = p_access->pf_block( p_access );
1769 if( p_access->b_die )
1770 vlc_object_kill( s );
1771 if( pb_eof ) *pb_eof = p_access->info.b_eof;
1772 if( p_input && p_block && libvlc_stats (p_access) )
1774 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1775 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1776 p_block->i_buffer, &i_total );
1777 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1778 (float)i_total, NULL );
1779 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1780 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1785 p_block = p_sys->p_list_access->pf_block( p_sys->p_list_access );
1786 if( p_access->b_die )
1787 vlc_object_kill( s );
1788 b_eof = p_sys->p_list_access->info.b_eof;
1789 if( pb_eof ) *pb_eof = b_eof;
1791 /* If we reached an EOF then switch to the next stream in the list */
1792 if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
1794 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1795 access_t *p_list_access;
1797 msg_Dbg( s, "opening input `%s'", psz_name );
1799 p_list_access = access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1801 if( !p_list_access ) return 0;
1803 if( p_sys->p_list_access != p_access )
1804 access_Delete( p_sys->p_list_access );
1806 p_sys->p_list_access = p_list_access;
1808 /* We have to read some data */
1809 return AReadBlock( s, pb_eof );
1815 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1816 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1817 p_block->i_buffer, &i_total );
1818 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1819 (float)i_total, NULL );
1820 stats_UpdateInteger( s, p_input->p->counters.p_read_packets,
1822 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1828 static int ASeek( stream_t *s, int64_t i_pos )
1830 stream_sys_t *p_sys = s->p_sys;
1831 access_t *p_access = p_sys->p_access;
1833 /* Check which stream we need to access */
1839 access_t *p_list_access = 0;
1841 for( i = 0; i < p_sys->i_list - 1; i++ )
1843 if( i_pos < p_sys->list[i]->i_size + i_size ) break;
1844 i_size += p_sys->list[i]->i_size;
1846 psz_name = p_sys->list[i]->psz_path;
1848 if( i != p_sys->i_list_index )
1849 msg_Dbg( s, "opening input `%s'", psz_name );
1851 if( i != p_sys->i_list_index && i != 0 )
1854 access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1856 else if( i != p_sys->i_list_index )
1858 p_list_access = p_access;
1863 if( p_sys->p_list_access != p_access )
1864 access_Delete( p_sys->p_list_access );
1866 p_sys->p_list_access = p_list_access;
1869 p_sys->i_list_index = i;
1870 return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
1874 return p_access->pf_seek( p_access, i_pos );
1879 * Try to read "i_read" bytes into a buffer pointed by "p_read". If
1880 * "p_read" is NULL then data are skipped instead of read. The return
1881 * value is the real numbers of bytes read/skip. If this value is less
1882 * than i_read that means that it's the end of the stream.
1884 int stream_Read( stream_t *s, void *p_read, int i_read )
1886 return s->pf_read( s, p_read, i_read );
1890 * Store in pp_peek a pointer to the next "i_peek" bytes in the stream
1891 * \return The real numbers of valid bytes, if it's less
1892 * or equal to 0, *pp_peek is invalid.
1893 * \note pp_peek is a pointer to internal buffer and it will be invalid as
1894 * soons as other stream_* functions are called.
1895 * \note Due to input limitation, it could be less than i_peek without meaning
1896 * the end of the stream (but only when you have i_peek >=
1897 * p_input->i_bufsize)
1899 int stream_Peek( stream_t *s, const uint8_t **pp_peek, int i_peek )
1901 return s->pf_peek( s, pp_peek, i_peek );
1905 * Use to control the "stream_t *". Look at #stream_query_e for
1906 * possible "i_query" value and format arguments. Return VLC_SUCCESS
1907 * if ... succeed ;) and VLC_EGENERIC if failed or unimplemented
1909 int stream_vaControl( stream_t *s, int i_query, va_list args )
1911 return s->pf_control( s, i_query, args );
1917 void stream_Delete( stream_t *s )
1922 int stream_Control( stream_t *s, int i_query, ... )
1928 return VLC_EGENERIC;
1930 va_start( args, i_query );
1931 i_result = s->pf_control( s, i_query, args );
1937 * Read "i_size" bytes and store them in a block_t.
1938 * It always read i_size bytes unless you are at the end of the stream
1939 * where it return what is available.
1941 block_t *stream_Block( stream_t *s, int i_size )
1943 if( i_size <= 0 ) return NULL;
1945 /* emulate block read */
1946 block_t *p_bk = block_New( s, i_size );
1949 int i_read = stream_Read( s, p_bk->p_buffer, i_size );
1952 p_bk->i_buffer = i_read;
1955 block_Release( p_bk );