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>
33 #include <vlc_memory.h>
40 #include "input_internal.h"
42 // #define STREAM_DEBUG 1
45 * - tune the 2 methods (block/stream)
46 * - compute cost for seek
47 * - improve stream mode seeking with closest segments
53 * One linked list of data read
55 * More complex scheme using mutliple track to avoid seeking
56 * - using directly the access (only indirection for peeking).
57 * This method is known to introduce much less latency.
58 * It should probably defaulted (instead of the stream method (2)).
61 /* How many tracks we have, currently only used for stream mode */
62 #ifdef OPTIMIZE_MEMORY
63 # define STREAM_CACHE_TRACK 1
64 /* Max size of our cache 128Ko per track */
65 # define STREAM_CACHE_SIZE (STREAM_CACHE_TRACK*1024*128)
67 # define STREAM_CACHE_TRACK 3
68 /* Max size of our cache 4Mo per track */
69 # define STREAM_CACHE_SIZE (4*STREAM_CACHE_TRACK*1024*1024)
72 /* How many data we try to prebuffer
73 * XXX it should be small to avoid useless latency but big enough for
74 * efficient demux probing */
75 #define STREAM_CACHE_PREBUFFER_SIZE (128)
77 /* Method1: Simple, for pf_block.
78 * We get blocks and put them in the linked list.
79 * We release blocks once the total size is bigger than CACHE_BLOCK_SIZE
82 /* Method2: A bit more complex, for pf_read
83 * - We use ring buffers, only one if unseekable, all if seekable
84 * - Upon seek date current ring, then search if one ring match the pos,
85 * yes: switch to it, seek the access to match the end of the ring
86 * no: search the ring with i_end the closer to i_pos,
87 * if close enough, read data and use this ring
88 * else use the oldest ring, seek and use it.
90 * TODO: - with access non seekable: use all space available for only one ring, but
91 * we have to support seekable/non-seekable switch on the fly.
92 * - compute a good value for i_read_size
95 #define STREAM_READ_ATONCE 1024
96 #define STREAM_CACHE_TRACK_SIZE (STREAM_CACHE_SIZE/STREAM_CACHE_TRACK)
120 } stream_read_method_t;
126 stream_read_method_t method; /* method to use */
128 uint64_t i_pos; /* Current reading offset */
130 /* Method 1: pf_block */
133 uint64_t i_start; /* Offset of block for p_first */
134 uint64_t i_offset; /* Offset for data in p_current */
135 block_t *p_current; /* Current block */
137 uint64_t i_size; /* Total amount of data in the list */
143 /* Method 2: for pf_read */
146 unsigned i_offset; /* Buffer offset in the current track */
147 int i_tk; /* Current track */
148 stream_track_t tk[STREAM_CACHE_TRACK];
154 unsigned i_used; /* Used since last read */
155 unsigned i_read_size;
159 /* Peek temporary buffer */
163 /* Stat for both method */
166 bool b_fastseek; /* From access */
168 /* Stat about reading data */
169 uint64_t i_read_count;
171 uint64_t i_read_time;
173 /* Stat about seek */
174 unsigned i_seek_count;
175 uint64_t i_seek_time;
181 access_entry_t **list;
183 access_t *p_list_access;
187 static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read );
188 static int AStreamPeekBlock( stream_t *s, const uint8_t **p_peek, unsigned int i_read );
189 static int AStreamSeekBlock( stream_t *s, uint64_t i_pos );
190 static void AStreamPrebufferBlock( stream_t *s );
191 static block_t *AReadBlock( stream_t *s, bool *pb_eof );
194 static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read );
195 static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read );
196 static int AStreamSeekStream( stream_t *s, uint64_t i_pos );
197 static void AStreamPrebufferStream( stream_t *s );
198 static int AReadStream( stream_t *s, void *p_read, unsigned int i_read );
201 static int AStreamControl( stream_t *s, int i_query, va_list );
202 static void AStreamDestroy( stream_t *s );
203 static void UStreamDestroy( stream_t *s );
204 static int ASeek( stream_t *s, uint64_t i_pos );
206 /****************************************************************************
207 * stream_CommonNew: create an empty stream structure
208 ****************************************************************************/
209 stream_t *stream_CommonNew( vlc_object_t *p_obj )
211 stream_t *s = (stream_t *)vlc_custom_create( p_obj, sizeof(*s),
212 VLC_OBJECT_GENERIC, "stream" );
217 s->p_text = malloc( sizeof(*s->p_text) );
220 vlc_object_release( s );
224 /* UTF16 and UTF32 text file conversion */
225 s->p_text->conv = (vlc_iconv_t)(-1);
226 s->p_text->i_char_width = 1;
227 s->p_text->b_little_endian = false;
232 void stream_CommonDelete( stream_t *s )
236 if( s->p_text->conv != (vlc_iconv_t)(-1) )
237 vlc_iconv_close( s->p_text->conv );
240 free( s->psz_access );
242 vlc_object_release( s );
246 /****************************************************************************
247 * stream_UrlNew: create a stream from a access
248 ****************************************************************************/
249 stream_t *stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
251 const char *psz_access, *psz_demux;
259 char psz_dup[strlen( psz_url ) + 1];
260 strcpy( psz_dup, psz_url );
261 input_SplitMRL( &psz_access, &psz_demux, &psz_path, psz_dup );
263 /* Now try a real access */
264 p_access = access_New( p_parent, NULL, psz_access, psz_demux, psz_path );
265 if( p_access == NULL )
267 msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
271 if( !( p_res = stream_AccessNew( p_access, NULL ) ) )
273 access_Delete( p_access );
277 p_res->pf_destroy = UStreamDestroy;
281 stream_t *stream_AccessNew( access_t *p_access, char **ppsz_list )
283 stream_t *s = stream_CommonNew( VLC_OBJECT(p_access) );
289 s->p_input = p_access->p_input;
290 s->psz_access = strdup( p_access->psz_access );
291 s->psz_path = strdup( p_access->psz_location );
292 s->p_sys = p_sys = malloc( sizeof( *p_sys ) );
293 if( !s->psz_access || !s->psz_path || !s->p_sys )
295 stream_CommonDelete( s );
299 /* Attach it now, needed for b_die */
300 vlc_object_attach( s, p_access );
302 s->pf_read = NULL; /* Set up later */
304 s->pf_control = AStreamControl;
305 s->pf_destroy = AStreamDestroy;
308 p_sys->p_access = p_access;
309 if( p_access->pf_block )
310 p_sys->method = STREAM_METHOD_BLOCK;
312 p_sys->method = STREAM_METHOD_STREAM;
314 p_sys->i_pos = p_access->info.i_pos;
317 access_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
318 p_sys->stat.i_bytes = 0;
319 p_sys->stat.i_read_time = 0;
320 p_sys->stat.i_read_count = 0;
321 p_sys->stat.i_seek_count = 0;
322 p_sys->stat.i_seek_time = 0;
324 TAB_INIT( p_sys->i_list, p_sys->list );
325 p_sys->i_list_index = 0;
326 p_sys->p_list_access = NULL;
328 /* Get the additional list of inputs if any (for concatenation) */
329 if( ppsz_list && ppsz_list[0] )
331 access_entry_t *p_entry = malloc( sizeof(*p_entry) );
335 p_entry->i_size = p_access->info.i_size;
336 p_entry->psz_path = strdup( p_access->psz_location );
337 if( !p_entry->psz_path )
342 p_sys->p_list_access = p_access;
343 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
344 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
345 p_entry->psz_path, p_access->info.i_size );
347 for( int i = 0; ppsz_list[i] != NULL; i++ )
349 char *psz_name = strdup( ppsz_list[i] );
354 access_t *p_tmp = access_New( p_access, p_access->p_input,
355 p_access->psz_access, "", psz_name );
359 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
360 psz_name, p_tmp->info.i_size );
362 p_entry = malloc( sizeof(*p_entry) );
365 p_entry->i_size = p_tmp->info.i_size;
366 p_entry->psz_path = psz_name;
367 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
369 access_Delete( p_tmp );
375 p_sys->p_peek = NULL;
377 if( p_sys->method == STREAM_METHOD_BLOCK )
379 msg_Dbg( s, "Using block method for AStream*" );
380 s->pf_read = AStreamReadBlock;
381 s->pf_peek = AStreamPeekBlock;
383 /* Init all fields of p_sys->block */
384 p_sys->block.i_start = p_sys->i_pos;
385 p_sys->block.i_offset = 0;
386 p_sys->block.p_current = NULL;
387 p_sys->block.i_size = 0;
388 p_sys->block.p_first = NULL;
389 p_sys->block.pp_last = &p_sys->block.p_first;
391 /* Do the prebuffering */
392 AStreamPrebufferBlock( s );
394 if( p_sys->block.i_size <= 0 )
396 msg_Err( s, "cannot pre fill buffer" );
404 assert( p_sys->method == STREAM_METHOD_STREAM );
406 msg_Dbg( s, "Using stream method for AStream*" );
408 s->pf_read = AStreamReadStream;
409 s->pf_peek = AStreamPeekStream;
411 /* Allocate/Setup our tracks */
412 p_sys->stream.i_offset = 0;
413 p_sys->stream.i_tk = 0;
414 p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
415 if( p_sys->stream.p_buffer == NULL )
417 p_sys->stream.i_used = 0;
418 p_sys->stream.i_read_size = STREAM_READ_ATONCE;
419 #if STREAM_READ_ATONCE < 256
420 # error "Invalid STREAM_READ_ATONCE value"
423 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
425 p_sys->stream.tk[i].i_date = 0;
426 p_sys->stream.tk[i].i_start = p_sys->i_pos;
427 p_sys->stream.tk[i].i_end = p_sys->i_pos;
428 p_sys->stream.tk[i].p_buffer=
429 &p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
432 /* Do the prebuffering */
433 AStreamPrebufferStream( s );
435 if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
437 msg_Err( s, "cannot pre fill buffer" );
445 if( p_sys->method == STREAM_METHOD_BLOCK )
451 free( p_sys->stream.p_buffer );
453 while( p_sys->i_list > 0 )
454 free( p_sys->list[--(p_sys->i_list)] );
457 stream_CommonDelete( s );
461 /****************************************************************************
463 ****************************************************************************/
464 static void AStreamDestroy( stream_t *s )
466 stream_sys_t *p_sys = s->p_sys;
468 if( p_sys->method == STREAM_METHOD_BLOCK )
469 block_ChainRelease( p_sys->block.p_first );
471 free( p_sys->stream.p_buffer );
473 free( p_sys->p_peek );
475 if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
476 access_Delete( p_sys->p_list_access );
478 while( p_sys->i_list-- )
480 free( p_sys->list[p_sys->i_list]->psz_path );
481 free( p_sys->list[p_sys->i_list] );
487 stream_CommonDelete( s );
490 static void UStreamDestroy( stream_t *s )
492 access_t *p_access = (access_t *)s->p_parent;
494 access_Delete( p_access );
497 /****************************************************************************
498 * AStreamControlReset:
499 ****************************************************************************/
500 static void AStreamControlReset( stream_t *s )
502 stream_sys_t *p_sys = s->p_sys;
504 p_sys->i_pos = p_sys->p_access->info.i_pos;
506 if( p_sys->method == STREAM_METHOD_BLOCK )
508 block_ChainRelease( p_sys->block.p_first );
510 /* Init all fields of p_sys->block */
511 p_sys->block.i_start = p_sys->i_pos;
512 p_sys->block.i_offset = 0;
513 p_sys->block.p_current = NULL;
514 p_sys->block.i_size = 0;
515 p_sys->block.p_first = NULL;
516 p_sys->block.pp_last = &p_sys->block.p_first;
518 /* Do the prebuffering */
519 AStreamPrebufferBlock( s );
525 assert( p_sys->method == STREAM_METHOD_STREAM );
527 /* Setup our tracks */
528 p_sys->stream.i_offset = 0;
529 p_sys->stream.i_tk = 0;
530 p_sys->stream.i_used = 0;
532 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
534 p_sys->stream.tk[i].i_date = 0;
535 p_sys->stream.tk[i].i_start = p_sys->i_pos;
536 p_sys->stream.tk[i].i_end = p_sys->i_pos;
539 /* Do the prebuffering */
540 AStreamPrebufferStream( s );
544 /****************************************************************************
545 * AStreamControlUpdate:
546 ****************************************************************************/
547 static void AStreamControlUpdate( stream_t *s )
549 stream_sys_t *p_sys = s->p_sys;
551 p_sys->i_pos = p_sys->p_access->info.i_pos;
556 for( i = 0; i < p_sys->i_list_index; i++ )
558 p_sys->i_pos += p_sys->list[i]->i_size;
563 /****************************************************************************
565 ****************************************************************************/
566 static int AStreamControl( stream_t *s, int i_query, va_list args )
568 stream_sys_t *p_sys = s->p_sys;
569 access_t *p_access = p_sys->p_access;
572 uint64_t *pi_64, i_64;
577 case STREAM_GET_SIZE:
578 pi_64 = va_arg( args, uint64_t * );
579 if( s->p_sys->i_list )
583 for( i = 0; i < s->p_sys->i_list; i++ )
584 *pi_64 += s->p_sys->list[i]->i_size;
587 *pi_64 = p_access->info.i_size;
590 case STREAM_CAN_SEEK:
591 p_bool = (bool*)va_arg( args, bool * );
592 access_Control( p_access, ACCESS_CAN_SEEK, p_bool );
595 case STREAM_CAN_FASTSEEK:
596 p_bool = (bool*)va_arg( args, bool * );
597 access_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
600 case STREAM_GET_POSITION:
601 pi_64 = va_arg( args, uint64_t * );
602 *pi_64 = p_sys->i_pos;
605 case STREAM_SET_POSITION:
606 i_64 = va_arg( args, uint64_t );
607 switch( p_sys->method )
609 case STREAM_METHOD_BLOCK:
610 return AStreamSeekBlock( s, i_64 );
611 case STREAM_METHOD_STREAM:
612 return AStreamSeekStream( s, i_64 );
618 case STREAM_CONTROL_ACCESS:
620 i_int = (int) va_arg( args, int );
621 if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
622 i_int != ACCESS_SET_PRIVATE_ID_CA &&
623 i_int != ACCESS_GET_PRIVATE_ID_STATE &&
624 i_int != ACCESS_SET_TITLE &&
625 i_int != ACCESS_SET_SEEKPOINT )
627 msg_Err( s, "Hey, what are you thinking ?"
628 "DON'T USE STREAM_CONTROL_ACCESS !!!" );
631 int i_ret = access_vaControl( p_access, i_int, args );
632 if( i_int == ACCESS_SET_TITLE || i_int == ACCESS_SET_SEEKPOINT )
633 AStreamControlReset( s );
637 case STREAM_UPDATE_SIZE:
638 AStreamControlUpdate( s );
641 case STREAM_GET_CONTENT_TYPE:
642 return access_Control( p_access, ACCESS_GET_CONTENT_TYPE,
643 va_arg( args, char ** ) );
644 case STREAM_SET_RECORD_STATE:
646 msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
652 /****************************************************************************
654 ****************************************************************************/
655 static void AStreamPrebufferBlock( stream_t *s )
657 stream_sys_t *p_sys = s->p_sys;
662 msg_Dbg( s, "starting pre-buffering" );
666 const int64_t i_date = mdate();
670 if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE )
675 p_sys->stat.i_bytes = p_sys->block.i_size;
676 p_sys->stat.i_read_time = i_date - i_start;
677 i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
678 (p_sys->stat.i_read_time + 1);
680 msg_Dbg( s, "prebuffering done %"PRId64" bytes in %"PRId64"s - "
683 p_sys->stat.i_read_time / INT64_C(1000000),
689 if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
698 /* Append the block */
699 p_sys->block.i_size += b->i_buffer;
700 *p_sys->block.pp_last = b;
701 p_sys->block.pp_last = &b->p_next;
703 p_sys->stat.i_read_count++;
710 msg_Dbg( s, "received first data after %d ms",
711 (int)((i_first-i_start)/1000) );
715 p_sys->block.p_current = p_sys->block.p_first;
718 static int AStreamRefillBlock( stream_t *s );
720 static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read )
722 stream_sys_t *p_sys = s->p_sys;
724 uint8_t *p_data = p_read;
725 unsigned int i_data = 0;
728 if( p_sys->block.p_current == NULL )
733 /* seek within this stream if possible, else use plain old read and discard */
734 stream_sys_t *p_sys = s->p_sys;
735 access_t *p_access = p_sys->p_access;
737 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
739 return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
742 while( i_data < i_read )
745 p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
746 unsigned int i_copy = __MIN( (unsigned int)__MAX(i_current,0), i_read - i_data);
752 &p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
758 p_sys->block.i_offset += i_copy;
759 if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
761 /* Current block is now empty, switch to next */
762 if( p_sys->block.p_current )
764 p_sys->block.i_offset = 0;
765 p_sys->block.p_current = p_sys->block.p_current->p_next;
767 /*Get a new block if needed */
768 if( !p_sys->block.p_current && AStreamRefillBlock( s ) )
775 p_sys->i_pos += i_data;
779 static int AStreamPeekBlock( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
781 stream_sys_t *p_sys = s->p_sys;
783 unsigned int i_data = 0;
785 unsigned int i_offset;
787 if( p_sys->block.p_current == NULL ) return 0; /* EOF */
789 /* We can directly give a pointer over our buffer */
790 if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
792 *pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
796 /* We need to create a local copy */
797 if( p_sys->i_peek < i_read )
799 p_sys->p_peek = realloc_or_free( p_sys->p_peek, i_read );
805 p_sys->i_peek = i_read;
808 /* Fill enough data */
809 while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
812 block_t **pp_last = p_sys->block.pp_last;
814 if( AStreamRefillBlock( s ) ) break;
816 /* Our buffer are probably filled enough, don't try anymore */
817 if( pp_last == p_sys->block.pp_last ) break;
820 /* Copy what we have */
821 b = p_sys->block.p_current;
822 i_offset = p_sys->block.i_offset;
823 p_data = p_sys->p_peek;
825 while( b && i_data < i_read )
827 unsigned int i_current = __MAX(b->i_buffer - i_offset,0);
828 int i_copy = __MIN( i_current, i_read - i_data );
830 memcpy( p_data, &b->p_buffer[i_offset], i_copy );
835 if( i_offset >= b->i_buffer )
842 *pp_peek = p_sys->p_peek;
846 static int AStreamSeekBlock( stream_t *s, uint64_t i_pos )
848 stream_sys_t *p_sys = s->p_sys;
849 access_t *p_access = p_sys->p_access;
850 int64_t i_offset = i_pos - p_sys->block.i_start;
853 /* We already have thoses data, just update p_current/i_offset */
854 if( i_offset >= 0 && (uint64_t)i_offset < p_sys->block.i_size )
856 block_t *b = p_sys->block.p_first;
859 while( i_current + b->i_buffer < (uint64_t)i_offset )
861 i_current += b->i_buffer;
865 p_sys->block.p_current = b;
866 p_sys->block.i_offset = i_offset - i_current;
868 p_sys->i_pos = i_pos;
873 /* We may need to seek or to read data */
877 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
881 msg_Err( s, "backward seeking impossible (access not seekable)" );
889 bool b_aseek, b_aseekfast;
891 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
892 access_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
897 msg_Warn( s, "%"PRId64" bytes need to be skipped "
898 "(access non seekable)",
899 i_offset - p_sys->block.i_size );
903 int64_t i_skip = i_offset - p_sys->block.i_size;
905 /* Avg bytes per packets */
906 int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
907 /* TODO compute a seek cost instead of fixed threshold */
908 int i_th = b_aseekfast ? 1 : 5;
910 if( i_skip <= i_th * i_avg &&
911 i_skip < STREAM_CACHE_SIZE )
916 msg_Dbg( s, "b_seek=%d th*avg=%d skip=%"PRId64,
917 b_seek, i_th*i_avg, i_skip );
923 int64_t i_start, i_end;
924 /* Do the access seek */
926 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
930 block_ChainRelease( p_sys->block.p_first );
933 p_sys->block.i_start = p_sys->i_pos = i_pos;
934 p_sys->block.i_offset = 0;
935 p_sys->block.p_current = NULL;
936 p_sys->block.i_size = 0;
937 p_sys->block.p_first = NULL;
938 p_sys->block.pp_last = &p_sys->block.p_first;
941 if( AStreamRefillBlock( s ) )
945 p_sys->stat.i_seek_time += i_end - i_start;
946 p_sys->stat.i_seek_count++;
953 while( p_sys->block.p_current &&
954 p_sys->i_pos + p_sys->block.p_current->i_buffer - p_sys->block.i_offset <= i_pos )
956 p_sys->i_pos += p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
957 p_sys->block.p_current = p_sys->block.p_current->p_next;
958 p_sys->block.i_offset = 0;
960 if( !p_sys->block.p_current && AStreamRefillBlock( s ) )
962 if( p_sys->i_pos != i_pos )
966 while( p_sys->block.i_start + p_sys->block.i_size < i_pos );
968 p_sys->block.i_offset += i_pos - p_sys->i_pos;
969 p_sys->i_pos = i_pos;
977 static int AStreamRefillBlock( stream_t *s )
979 stream_sys_t *p_sys = s->p_sys;
983 while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
984 p_sys->block.p_first != p_sys->block.p_current )
986 block_t *b = p_sys->block.p_first;
988 p_sys->block.i_start += b->i_buffer;
989 p_sys->block.i_size -= b->i_buffer;
990 p_sys->block.p_first = b->p_next;
994 if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
995 p_sys->block.p_current == p_sys->block.p_first &&
996 p_sys->block.p_current->p_next ) /* At least 2 packets */
998 /* Enough data, don't read more */
1002 /* Now read a new block */
1003 const int64_t i_start = mdate();
1009 return VLC_EGENERIC;
1012 if( ( b = AReadBlock( s, &b_eof ) ) )
1015 return VLC_EGENERIC;
1018 p_sys->stat.i_read_time += mdate() - i_start;
1021 /* Append the block */
1022 p_sys->block.i_size += b->i_buffer;
1023 *p_sys->block.pp_last = b;
1024 p_sys->block.pp_last = &b->p_next;
1027 if( p_sys->block.p_current == NULL )
1028 p_sys->block.p_current = b;
1031 p_sys->stat.i_bytes += b->i_buffer;
1032 p_sys->stat.i_read_count++;
1040 /****************************************************************************
1042 ****************************************************************************/
1043 static int AStreamRefillStream( stream_t *s );
1044 static int AStreamReadNoSeekStream( stream_t *s, void *p_read, unsigned int i_read );
1046 static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read )
1048 stream_sys_t *p_sys = s->p_sys;
1052 const uint64_t i_pos_wanted = p_sys->i_pos + i_read;
1054 if( AStreamSeekStream( s, i_pos_wanted ) )
1056 if( p_sys->i_pos != i_pos_wanted )
1061 return AStreamReadNoSeekStream( s, p_read, i_read );
1064 static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
1066 stream_sys_t *p_sys = s->p_sys;
1067 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1070 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
1073 msg_Dbg( s, "AStreamPeekStream: %d pos=%"PRId64" tk=%d "
1074 "start=%"PRId64" offset=%d end=%"PRId64,
1075 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1076 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1079 /* Avoid problem, but that should *never* happen */
1080 if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
1081 i_read = STREAM_CACHE_TRACK_SIZE / 2;
1083 while( tk->i_end < tk->i_start + p_sys->stream.i_offset + i_read )
1085 if( p_sys->stream.i_used <= 1 )
1087 /* Be sure we will read something */
1088 p_sys->stream.i_used += tk->i_start + p_sys->stream.i_offset + i_read - tk->i_end;
1090 if( AStreamRefillStream( s ) ) break;
1093 if( tk->i_end < tk->i_start + p_sys->stream.i_offset + i_read )
1095 i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
1099 /* Now, direct pointer or a copy ? */
1100 i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1101 if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
1103 *pp_peek = &tk->p_buffer[i_off];
1107 if( p_sys->i_peek < i_read )
1109 p_sys->p_peek = realloc_or_free( p_sys->p_peek, i_read );
1110 if( !p_sys->p_peek )
1115 p_sys->i_peek = i_read;
1118 memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
1119 STREAM_CACHE_TRACK_SIZE - i_off );
1120 memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
1121 &tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
1123 *pp_peek = p_sys->p_peek;
1127 static int AStreamSeekStream( stream_t *s, uint64_t i_pos )
1129 stream_sys_t *p_sys = s->p_sys;
1131 stream_track_t *p_current = &p_sys->stream.tk[p_sys->stream.i_tk];
1132 access_t *p_access = p_sys->p_access;
1134 if( p_current->i_start >= p_current->i_end && i_pos >= p_current->i_end )
1138 msg_Dbg( s, "AStreamSeekStream: to %"PRId64" pos=%"PRId64
1139 " tk=%d start=%"PRId64" offset=%d end=%"PRId64,
1140 i_pos, p_sys->i_pos, p_sys->stream.i_tk,
1142 p_sys->stream.i_offset,
1147 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1148 if( !b_aseek && i_pos < p_current->i_start )
1150 msg_Warn( s, "AStreamSeekStream: can't seek" );
1151 return VLC_EGENERIC;
1155 access_Control( p_access, ACCESS_CAN_FASTSEEK, &b_afastseek );
1157 /* FIXME compute seek cost (instead of static 'stupid' value) */
1158 uint64_t i_skip_threshold;
1160 i_skip_threshold = b_afastseek ? 128 : 3*p_sys->stream.i_read_size;
1162 i_skip_threshold = INT64_MAX;
1164 /* Date the current track */
1165 p_current->i_date = mdate();
1167 /* Search a new track slot */
1168 stream_track_t *tk = NULL;
1171 /* Prefer the current track */
1172 if( p_current->i_start <= i_pos && i_pos <= p_current->i_end + i_skip_threshold )
1175 i_tk_idx = p_sys->stream.i_tk;
1179 /* Try to maximize already read data */
1180 for( int i = 0; i < STREAM_CACHE_TRACK; i++ )
1182 stream_track_t *t = &p_sys->stream.tk[i];
1184 if( t->i_start > i_pos || i_pos > t->i_end )
1187 if( !tk || tk->i_end < t->i_end )
1196 /* Use the oldest unused */
1197 for( int i = 0; i < STREAM_CACHE_TRACK; i++ )
1199 stream_track_t *t = &p_sys->stream.tk[i];
1201 if( !tk || tk->i_date > t->i_date )
1208 assert( i_tk_idx >= 0 && i_tk_idx < STREAM_CACHE_TRACK );
1210 if( tk != p_current )
1211 i_skip_threshold = 0;
1212 if( tk->i_start <= i_pos && i_pos <= tk->i_end + i_skip_threshold )
1215 msg_Err( s, "AStreamSeekStream: reusing %d start=%"PRId64
1216 " end=%"PRId64"(%s)",
1217 i_tk_idx, tk->i_start, tk->i_end,
1218 tk != p_current ? "seek" : i_pos > tk->i_end ? "skip" : "noseek" );
1220 if( tk != p_current )
1224 /* Seek at the end of the buffer
1225 * TODO it is stupid to seek now, it would be better to delay it
1227 if( ASeek( s, tk->i_end ) )
1228 return VLC_EGENERIC;
1230 else if( i_pos > tk->i_end )
1232 uint64_t i_skip = i_pos - tk->i_end;
1235 const int i_read_max = __MIN( 10 * STREAM_READ_ATONCE, i_skip );
1236 if( AStreamReadNoSeekStream( s, NULL, i_read_max ) != i_read_max )
1237 return VLC_EGENERIC;
1238 i_skip -= i_read_max;
1245 msg_Err( s, "AStreamSeekStream: hard seek" );
1247 /* Nothing good, seek and choose oldest segment */
1248 if( ASeek( s, i_pos ) )
1249 return VLC_EGENERIC;
1251 tk->i_start = i_pos;
1254 p_sys->stream.i_offset = i_pos - tk->i_start;
1255 p_sys->stream.i_tk = i_tk_idx;
1256 p_sys->i_pos = i_pos;
1258 /* If there is not enough data left in the track, refill */
1259 /* TODO How to get a correct value for
1260 * - refilling threshold
1261 * - how much to refill
1263 if( tk->i_end < tk->i_start + p_sys->stream.i_offset + p_sys->stream.i_read_size )
1265 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1266 p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
1268 if( AStreamRefillStream( s ) && i_pos == tk->i_end )
1269 return VLC_EGENERIC;
1274 static int AStreamReadNoSeekStream( stream_t *s, void *p_read, unsigned int i_read )
1276 stream_sys_t *p_sys = s->p_sys;
1277 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1279 uint8_t *p_data = (uint8_t *)p_read;
1280 unsigned int i_data = 0;
1282 if( tk->i_start >= tk->i_end )
1286 msg_Dbg( s, "AStreamReadStream: %d pos=%"PRId64" tk=%d start=%"PRId64
1287 " offset=%d end=%"PRId64,
1288 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1289 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1292 while( i_data < i_read )
1294 unsigned i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1295 unsigned int i_current =
1296 __MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
1297 STREAM_CACHE_TRACK_SIZE - i_off );
1298 int i_copy = __MIN( i_current, i_read - i_data );
1300 if( i_copy <= 0 ) break; /* EOF */
1303 /* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
1306 memcpy( p_data, &tk->p_buffer[i_off], i_copy );
1310 p_sys->stream.i_offset += i_copy;
1312 /* Update pos now */
1313 p_sys->i_pos += i_copy;
1316 p_sys->stream.i_used += i_copy;
1318 if( tk->i_end + i_data <= tk->i_start + p_sys->stream.i_offset + i_read )
1320 const unsigned i_read_requested = __MAX( __MIN( i_read - i_data,
1321 STREAM_READ_ATONCE * 10 ),
1322 STREAM_READ_ATONCE / 2 );
1324 if( p_sys->stream.i_used < i_read_requested )
1325 p_sys->stream.i_used = i_read_requested;
1327 if( AStreamRefillStream( s ) )
1330 if( tk->i_start >= tk->i_end ) break;
1339 static int AStreamRefillStream( stream_t *s )
1341 stream_sys_t *p_sys = s->p_sys;
1342 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1344 /* We read but won't increase i_start after initial start + offset */
1346 __MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
1347 (tk->i_end - tk->i_start - p_sys->stream.i_offset) );
1348 bool b_read = false;
1349 int64_t i_start, i_stop;
1351 if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
1354 msg_Dbg( s, "AStreamRefillStream: used=%d toread=%d",
1355 p_sys->stream.i_used, i_toread );
1359 while( i_toread > 0 )
1361 int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
1365 return VLC_EGENERIC;
1367 i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
1368 i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
1370 /* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
1375 else if( i_read == 0 )
1378 return VLC_EGENERIC;
1384 tk->i_end += i_read;
1386 /* Windows of STREAM_CACHE_TRACK_SIZE */
1387 if( tk->i_start + STREAM_CACHE_TRACK_SIZE < tk->i_end )
1389 unsigned i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
1391 tk->i_start += i_invalid;
1392 p_sys->stream.i_offset -= i_invalid;
1396 p_sys->stream.i_used -= i_read;
1398 p_sys->stat.i_bytes += i_read;
1399 p_sys->stat.i_read_count++;
1403 p_sys->stat.i_read_time += i_stop - i_start;
1408 static void AStreamPrebufferStream( stream_t *s )
1410 stream_sys_t *p_sys = s->p_sys;
1412 int64_t i_first = 0;
1415 msg_Dbg( s, "starting pre-buffering" );
1419 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1421 int64_t i_date = mdate();
1423 int i_buffered = tk->i_end - tk->i_start;
1425 if( s->b_die || i_buffered >= STREAM_CACHE_PREBUFFER_SIZE )
1430 p_sys->stat.i_bytes = i_buffered;
1431 p_sys->stat.i_read_time = i_date - i_start;
1432 i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
1433 (p_sys->stat.i_read_time+1);
1435 msg_Dbg( s, "pre-buffering done %"PRId64" bytes in %"PRId64"s - "
1437 p_sys->stat.i_bytes,
1438 p_sys->stat.i_read_time / INT64_C(1000000),
1439 i_byterate / 1024 );
1444 i_read = STREAM_CACHE_TRACK_SIZE - i_buffered;
1445 i_read = __MIN( (int)p_sys->stream.i_read_size, i_read );
1446 i_read = AReadStream( s, &tk->p_buffer[i_buffered], i_read );
1449 else if( i_read == 0 )
1455 msg_Dbg( s, "received first data after %d ms",
1456 (int)((i_first-i_start)/1000) );
1459 tk->i_end += i_read;
1461 p_sys->stat.i_read_count++;
1465 /****************************************************************************
1467 ****************************************************************************/
1469 * Read from the stream untill first newline.
1470 * \param s Stream handle to read from
1471 * \return A pointer to the allocated output string. You need to free this when you are done.
1473 #define STREAM_PROBE_LINE 2048
1474 #define STREAM_LINE_MAX (2048*100)
1475 char *stream_ReadLine( stream_t *s )
1477 char *p_line = NULL;
1478 int i_line = 0, i_read = 0;
1480 while( i_read < STREAM_LINE_MAX )
1483 const uint8_t *p_data;
1487 /* Probe new data */
1488 i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
1489 if( i_data <= 0 ) break; /* No more data */
1492 i_pos = stream_Tell( s );
1493 if( i_pos == 0 && i_data >= 3 )
1496 const char *psz_encoding = NULL;
1498 if( !memcmp( p_data, "\xEF\xBB\xBF", 3 ) )
1500 psz_encoding = "UTF-8";
1503 else if( !memcmp( p_data, "\xFF\xFE", 2 ) )
1505 psz_encoding = "UTF-16LE";
1506 s->p_text->b_little_endian = true;
1507 s->p_text->i_char_width = 2;
1510 else if( !memcmp( p_data, "\xFE\xFF", 2 ) )
1512 psz_encoding = "UTF-16BE";
1513 s->p_text->i_char_width = 2;
1517 /* Seek past the BOM */
1520 stream_Seek( s, i_bom_size );
1521 p_data += i_bom_size;
1522 i_data -= i_bom_size;
1525 /* Open the converter if we need it */
1526 if( psz_encoding != NULL )
1528 msg_Dbg( s, "%s BOM detected", psz_encoding );
1529 if( s->p_text->i_char_width > 1 )
1531 s->p_text->conv = vlc_iconv_open( "UTF-8", psz_encoding );
1532 if( s->p_text->conv == (vlc_iconv_t)-1 )
1534 msg_Err( s, "iconv_open failed" );
1538 /* FIXME that's UGLY */
1539 input_thread_t *p_input = s->p_input;
1540 if( p_input != NULL)
1542 var_Create( p_input, "subsdec-encoding", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
1543 var_SetString( p_input, "subsdec-encoding", "UTF-8" );
1548 if( i_data % s->p_text->i_char_width )
1550 /* keep i_char_width boundary */
1551 i_data = i_data - ( i_data % s->p_text->i_char_width );
1552 msg_Warn( s, "the read is not i_char_width compatible");
1558 /* Check if there is an EOL */
1559 if( s->p_text->i_char_width == 1 )
1561 /* UTF-8: 0A <LF> */
1562 psz_eol = memchr( p_data, '\n', i_data );
1563 if( psz_eol == NULL )
1564 /* UTF-8: 0D <CR> */
1565 psz_eol = memchr( p_data, '\r', i_data );
1569 const uint8_t *p_last = p_data + i_data - s->p_text->i_char_width;
1570 uint16_t eol = s->p_text->b_little_endian ? 0x0A00 : 0x00A0;
1572 assert( s->p_text->i_char_width == 2 );
1574 /* UTF-16: 000A <LF> */
1575 for( const uint8_t *p = p_data; p <= p_last; p += 2 )
1577 if( U16_AT( p ) == eol )
1579 psz_eol = (char *)p + 1;
1584 if( psz_eol == NULL )
1585 { /* UTF-16: 000D <CR> */
1586 eol = s->p_text->b_little_endian ? 0x0D00 : 0x00D0;
1587 for( const uint8_t *p = p_data; p <= p_last; p += 2 )
1589 if( U16_AT( p ) == eol )
1591 psz_eol = (char *)p + 1;
1600 i_data = (psz_eol - (char *)p_data) + 1;
1601 p_line = realloc_or_free( p_line,
1602 i_line + i_data + s->p_text->i_char_width ); /* add \0 */
1605 i_data = stream_Read( s, &p_line[i_line], i_data );
1606 if( i_data <= 0 ) break; /* Hmmm */
1607 i_line += i_data - s->p_text->i_char_width; /* skip \n */;
1610 /* We have our line */
1614 /* Read data (+1 for easy \0 append) */
1615 p_line = realloc_or_free( p_line,
1616 i_line + STREAM_PROBE_LINE + s->p_text->i_char_width );
1619 i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
1620 if( i_data <= 0 ) break; /* Hmmm */
1628 for( j = 0; j < s->p_text->i_char_width; j++ )
1630 p_line[i_line + j] = '\0';
1632 i_line += s->p_text->i_char_width; /* the added \0 */
1633 if( s->p_text->i_char_width > 1 )
1635 size_t i_in = 0, i_out = 0;
1636 const char * p_in = NULL;
1637 char * p_out = NULL;
1638 char * psz_new_line = NULL;
1641 psz_new_line = malloc( i_line );
1642 if( psz_new_line == NULL )
1644 i_in = i_out = (size_t)i_line;
1646 p_out = psz_new_line;
1648 if( vlc_iconv( s->p_text->conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
1650 msg_Err( s, "iconv failed" );
1651 msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
1654 p_line = psz_new_line;
1655 i_line = (size_t)i_line - i_out; /* does not include \0 */
1658 /* Remove trailing LF/CR */
1659 while( i_line >= 2 && ( p_line[i_line-2] == '\r' ||
1660 p_line[i_line-2] == '\n') ) i_line--;
1662 /* Make sure the \0 is there */
1663 p_line[i_line-1] = '\0';
1669 /* We failed to read any data, probably EOF */
1673 if( s->p_text->conv != (vlc_iconv_t)(-1) )
1674 vlc_iconv_close( s->p_text->conv );
1675 s->p_text->conv = (vlc_iconv_t)(-1);
1679 /****************************************************************************
1680 * Access reading/seeking wrappers to handle concatenated streams.
1681 ****************************************************************************/
1682 static int AReadStream( stream_t *s, void *p_read, unsigned int i_read )
1684 stream_sys_t *p_sys = s->p_sys;
1685 access_t *p_access = p_sys->p_access;
1686 input_thread_t *p_input = NULL;
1687 int i_read_orig = i_read;
1690 if( s->p_parent && s->p_parent->p_parent &&
1691 vlc_internals( s->p_parent->p_parent )->i_object_type == VLC_OBJECT_INPUT )
1692 p_input = (input_thread_t *)s->p_parent->p_parent;
1694 if( !p_sys->i_list )
1696 i_read = p_access->pf_read( p_access, p_read, i_read );
1697 if( p_access->b_die )
1698 vlc_object_kill( s );
1701 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1702 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read,
1704 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1705 (float)i_total, NULL );
1706 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1707 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1712 i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
1714 if( p_access->b_die )
1715 vlc_object_kill( s );
1717 /* If we reached an EOF then switch to the next stream in the list */
1718 if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
1720 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1721 access_t *p_list_access;
1723 msg_Dbg( s, "opening input `%s'", psz_name );
1725 p_list_access = access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1727 if( !p_list_access ) return 0;
1729 if( p_sys->p_list_access != p_access )
1730 access_Delete( p_sys->p_list_access );
1732 p_sys->p_list_access = p_list_access;
1734 /* We have to read some data */
1735 return AReadStream( s, p_read, i_read_orig );
1738 /* Update read bytes in input */
1741 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1742 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read, &i_total );
1743 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1744 (float)i_total, NULL );
1745 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1746 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1751 static block_t *AReadBlock( stream_t *s, bool *pb_eof )
1753 stream_sys_t *p_sys = s->p_sys;
1754 access_t *p_access = p_sys->p_access;
1755 input_thread_t *p_input = NULL;
1760 if( s->p_parent && s->p_parent->p_parent &&
1761 vlc_internals( s->p_parent->p_parent )->i_object_type == VLC_OBJECT_INPUT )
1762 p_input = (input_thread_t *)s->p_parent->p_parent;
1764 if( !p_sys->i_list )
1766 p_block = p_access->pf_block( p_access );
1767 if( p_access->b_die )
1768 vlc_object_kill( s );
1769 if( pb_eof ) *pb_eof = p_access->info.b_eof;
1770 if( p_input && p_block && libvlc_stats (p_access) )
1772 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1773 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1774 p_block->i_buffer, &i_total );
1775 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1776 (float)i_total, NULL );
1777 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1778 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1783 p_block = p_sys->p_list_access->pf_block( p_sys->p_list_access );
1784 if( p_access->b_die )
1785 vlc_object_kill( s );
1786 b_eof = p_sys->p_list_access->info.b_eof;
1787 if( pb_eof ) *pb_eof = b_eof;
1789 /* If we reached an EOF then switch to the next stream in the list */
1790 if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
1792 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1793 access_t *p_list_access;
1795 msg_Dbg( s, "opening input `%s'", psz_name );
1797 p_list_access = access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1799 if( !p_list_access ) return 0;
1801 if( p_sys->p_list_access != p_access )
1802 access_Delete( p_sys->p_list_access );
1804 p_sys->p_list_access = p_list_access;
1806 /* We have to read some data */
1807 return AReadBlock( s, pb_eof );
1813 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1814 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1815 p_block->i_buffer, &i_total );
1816 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1817 (float)i_total, NULL );
1818 stats_UpdateInteger( s, p_input->p->counters.p_read_packets,
1820 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1826 static int ASeek( stream_t *s, uint64_t i_pos )
1828 stream_sys_t *p_sys = s->p_sys;
1829 access_t *p_access = p_sys->p_access;
1831 /* Check which stream we need to access */
1837 access_t *p_list_access = 0;
1839 for( i = 0; i < p_sys->i_list - 1; i++ )
1841 if( i_pos < p_sys->list[i]->i_size + i_size ) break;
1842 i_size += p_sys->list[i]->i_size;
1844 psz_name = p_sys->list[i]->psz_path;
1846 if( i != p_sys->i_list_index )
1847 msg_Dbg( s, "opening input `%s'", psz_name );
1849 if( i != p_sys->i_list_index && i != 0 )
1852 access_New( s, s->p_input, p_access->psz_access, "", psz_name );
1854 else if( i != p_sys->i_list_index )
1856 p_list_access = p_access;
1861 if( p_sys->p_list_access != p_access )
1862 access_Delete( p_sys->p_list_access );
1864 p_sys->p_list_access = p_list_access;
1867 p_sys->i_list_index = i;
1868 return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
1872 return p_access->pf_seek( p_access, i_pos );
1877 * Try to read "i_read" bytes into a buffer pointed by "p_read". If
1878 * "p_read" is NULL then data are skipped instead of read. The return
1879 * value is the real numbers of bytes read/skip. If this value is less
1880 * than i_read that means that it's the end of the stream.
1882 int stream_Read( stream_t *s, void *p_read, int i_read )
1884 return s->pf_read( s, p_read, i_read );
1888 * Store in pp_peek a pointer to the next "i_peek" bytes in the stream
1889 * \return The real numbers of valid bytes, if it's less
1890 * or equal to 0, *pp_peek is invalid.
1891 * \note pp_peek is a pointer to internal buffer and it will be invalid as
1892 * soons as other stream_* functions are called.
1893 * \note Due to input limitation, it could be less than i_peek without meaning
1894 * the end of the stream (but only when you have i_peek >=
1895 * p_input->i_bufsize)
1897 int stream_Peek( stream_t *s, const uint8_t **pp_peek, int i_peek )
1899 return s->pf_peek( s, pp_peek, i_peek );
1903 * Use to control the "stream_t *". Look at #stream_query_e for
1904 * possible "i_query" value and format arguments. Return VLC_SUCCESS
1905 * if ... succeed ;) and VLC_EGENERIC if failed or unimplemented
1907 int stream_vaControl( stream_t *s, int i_query, va_list args )
1909 return s->pf_control( s, i_query, args );
1915 void stream_Delete( stream_t *s )
1920 int stream_Control( stream_t *s, int i_query, ... )
1926 return VLC_EGENERIC;
1928 va_start( args, i_query );
1929 i_result = s->pf_control( s, i_query, args );
1935 * Read "i_size" bytes and store them in a block_t.
1936 * It always read i_size bytes unless you are at the end of the stream
1937 * where it return what is available.
1939 block_t *stream_Block( stream_t *s, int i_size )
1941 if( i_size <= 0 ) return NULL;
1943 /* emulate block read */
1944 block_t *p_bk = block_New( s, i_size );
1947 int i_read = stream_Read( s, p_bk->p_buffer, i_size );
1950 p_bk->i_buffer = i_read;
1953 block_Release( p_bk );