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"
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;
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 vlc_object_release( s );
243 /****************************************************************************
244 * stream_UrlNew: create a stream from a access
245 ****************************************************************************/
246 stream_t *__stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
248 const char *psz_access, *psz_demux;
256 char psz_dup[strlen( psz_url ) + 1];
257 strcpy( psz_dup, psz_url );
258 input_SplitMRL( &psz_access, &psz_demux, &psz_path, psz_dup );
260 /* Now try a real access */
261 p_access = access_New( p_parent, psz_access, psz_demux, psz_path );
263 if( p_access == NULL )
265 msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
269 if( !( p_res = stream_AccessNew( p_access ) ) )
271 access_Delete( p_access );
275 p_res->pf_destroy = UStreamDestroy;
279 stream_t *stream_AccessNew( access_t *p_access )
281 stream_t *s = stream_CommonNew( VLC_OBJECT(p_access) );
283 char *psz_list = NULL;
288 s->p_sys = p_sys = malloc( sizeof( stream_sys_t ) );
291 stream_CommonDelete( s );
295 /* Attach it now, needed for b_die */
296 vlc_object_attach( s, p_access );
298 s->pf_read = NULL; /* Set up later */
300 s->pf_control = AStreamControl;
301 s->pf_destroy = AStreamDestroy;
304 p_sys->p_access = p_access;
305 if( p_access->pf_block )
306 p_sys->method = STREAM_METHOD_BLOCK;
308 p_sys->method = STREAM_METHOD_STREAM;
310 p_sys->i_pos = p_access->info.i_pos;
313 access_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
314 p_sys->stat.i_bytes = 0;
315 p_sys->stat.i_read_time = 0;
316 p_sys->stat.i_read_count = 0;
317 p_sys->stat.i_seek_count = 0;
318 p_sys->stat.i_seek_time = 0;
322 p_sys->i_list_index = 0;
323 p_sys->p_list_access = 0;
325 /* Get the additional list of inputs if any (for concatenation) */
326 if( (psz_list = var_CreateGetString( s, "input-list" )) && *psz_list )
328 access_entry_t *p_entry = malloc( sizeof(access_entry_t) );
329 if( p_entry == NULL )
331 char *psz_name, *psz_parser = psz_name = psz_list;
333 p_sys->p_list_access = p_access;
334 p_entry->i_size = p_access->info.i_size;
335 p_entry->psz_path = strdup( p_access->psz_path );
336 if( p_entry->psz_path == NULL )
341 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
342 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
343 p_entry->psz_path, p_access->info.i_size );
345 while( psz_name && *psz_name )
347 psz_parser = strchr( psz_name, ',' );
348 if( psz_parser ) *psz_parser = 0;
350 psz_name = strdup( psz_name );
353 access_t *p_tmp = access_New( p_access, p_access->psz_access,
358 psz_name = psz_parser;
359 if( psz_name ) psz_name++;
363 msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
364 psz_name, p_tmp->info.i_size );
366 p_entry = malloc( sizeof(access_entry_t) );
367 if( p_entry == NULL )
369 p_entry->i_size = p_tmp->info.i_size;
370 p_entry->psz_path = psz_name;
371 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
373 access_Delete( p_tmp );
376 psz_name = psz_parser;
377 if( psz_name ) psz_name++;
380 FREENULL( psz_list );
384 p_sys->p_peek = NULL;
386 if( p_sys->method == STREAM_METHOD_BLOCK )
388 msg_Dbg( s, "Using AStream*Block" );
389 s->pf_read = AStreamReadBlock;
390 s->pf_peek = AStreamPeekBlock;
392 /* Init all fields of p_sys->block */
393 p_sys->block.i_start = p_sys->i_pos;
394 p_sys->block.i_offset = 0;
395 p_sys->block.p_current = NULL;
396 p_sys->block.i_size = 0;
397 p_sys->block.p_first = NULL;
398 p_sys->block.pp_last = &p_sys->block.p_first;
400 /* Do the prebuffering */
401 AStreamPrebufferBlock( s );
403 if( p_sys->block.i_size <= 0 )
405 msg_Err( s, "cannot pre fill buffer" );
413 assert( p_sys->method == STREAM_METHOD_STREAM );
415 msg_Dbg( s, "Using AStream*Stream" );
417 s->pf_read = AStreamReadStream;
418 s->pf_peek = AStreamPeekStream;
420 /* Allocate/Setup our tracks */
421 p_sys->stream.i_offset = 0;
422 p_sys->stream.i_tk = 0;
423 p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
424 if( p_sys->stream.p_buffer == NULL )
426 p_sys->stream.i_used = 0;
427 access_Control( p_access, ACCESS_GET_MTU,
428 &p_sys->stream.i_read_size );
429 if( p_sys->stream.i_read_size <= 0 )
430 p_sys->stream.i_read_size = STREAM_READ_ATONCE;
431 else if( p_sys->stream.i_read_size <= 256 )
432 p_sys->stream.i_read_size = 256;
434 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
436 p_sys->stream.tk[i].i_date = 0;
437 p_sys->stream.tk[i].i_start = p_sys->i_pos;
438 p_sys->stream.tk[i].i_end = p_sys->i_pos;
439 p_sys->stream.tk[i].p_buffer=
440 &p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
443 /* Do the prebuffering */
444 AStreamPrebufferStream( s );
446 if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
448 msg_Err( s, "cannot pre fill buffer" );
456 if( p_sys->method == STREAM_METHOD_BLOCK )
462 free( p_sys->stream.p_buffer );
464 while( p_sys->i_list > 0 )
465 free( p_sys->list[--(p_sys->i_list)] );
469 vlc_object_detach( s );
470 stream_CommonDelete( s );
474 /****************************************************************************
476 ****************************************************************************/
477 static void AStreamDestroy( stream_t *s )
479 stream_sys_t *p_sys = s->p_sys;
481 vlc_object_detach( s );
483 if( p_sys->method == STREAM_METHOD_BLOCK )
484 block_ChainRelease( p_sys->block.p_first );
486 free( p_sys->stream.p_buffer );
488 free( p_sys->p_peek );
490 if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
491 access_Delete( p_sys->p_list_access );
493 while( p_sys->i_list-- )
495 free( p_sys->list[p_sys->i_list]->psz_path );
496 free( p_sys->list[p_sys->i_list] );
502 stream_CommonDelete( s );
505 static void UStreamDestroy( stream_t *s )
507 access_t *p_access = (access_t *)s->p_parent;
509 access_Delete( p_access );
512 /****************************************************************************
513 * AStreamControlReset:
514 ****************************************************************************/
515 static void AStreamControlReset( stream_t *s )
517 stream_sys_t *p_sys = s->p_sys;
519 p_sys->i_pos = p_sys->p_access->info.i_pos;
521 if( p_sys->method == STREAM_METHOD_BLOCK )
523 block_ChainRelease( p_sys->block.p_first );
525 /* Init all fields of p_sys->block */
526 p_sys->block.i_start = p_sys->i_pos;
527 p_sys->block.i_offset = 0;
528 p_sys->block.p_current = NULL;
529 p_sys->block.i_size = 0;
530 p_sys->block.p_first = NULL;
531 p_sys->block.pp_last = &p_sys->block.p_first;
533 /* Do the prebuffering */
534 AStreamPrebufferBlock( s );
540 assert( p_sys->method == STREAM_METHOD_STREAM );
542 /* Setup our tracks */
543 p_sys->stream.i_offset = 0;
544 p_sys->stream.i_tk = 0;
545 p_sys->stream.i_used = 0;
547 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
549 p_sys->stream.tk[i].i_date = 0;
550 p_sys->stream.tk[i].i_start = p_sys->i_pos;
551 p_sys->stream.tk[i].i_end = p_sys->i_pos;
554 /* Do the prebuffering */
555 AStreamPrebufferStream( s );
559 /****************************************************************************
560 * AStreamControlUpdate:
561 ****************************************************************************/
562 static void AStreamControlUpdate( stream_t *s )
564 stream_sys_t *p_sys = s->p_sys;
566 p_sys->i_pos = p_sys->p_access->info.i_pos;
571 for( i = 0; i < p_sys->i_list_index; i++ )
573 p_sys->i_pos += p_sys->list[i]->i_size;
578 /****************************************************************************
580 ****************************************************************************/
581 static int AStreamControl( stream_t *s, int i_query, va_list args )
583 stream_sys_t *p_sys = s->p_sys;
584 access_t *p_access = p_sys->p_access;
587 int64_t *pi_64, i_64;
592 case STREAM_GET_SIZE:
593 pi_64 = (int64_t*)va_arg( args, int64_t * );
594 if( s->p_sys->i_list )
598 for( i = 0; i < s->p_sys->i_list; i++ )
599 *pi_64 += s->p_sys->list[i]->i_size;
602 *pi_64 = p_access->info.i_size;
605 case STREAM_CAN_SEEK:
606 p_bool = (bool*)va_arg( args, bool * );
607 access_Control( p_access, ACCESS_CAN_SEEK, p_bool );
610 case STREAM_CAN_FASTSEEK:
611 p_bool = (bool*)va_arg( args, bool * );
612 access_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
615 case STREAM_GET_POSITION:
616 pi_64 = (int64_t*)va_arg( args, int64_t * );
617 *pi_64 = p_sys->i_pos;
620 case STREAM_SET_POSITION:
621 i_64 = (int64_t)va_arg( args, int64_t );
622 switch( p_sys->method )
624 case STREAM_METHOD_BLOCK:
625 return AStreamSeekBlock( s, i_64 );
626 case STREAM_METHOD_STREAM:
627 return AStreamSeekStream( s, i_64 );
636 case STREAM_CONTROL_ACCESS:
638 i_int = (int) va_arg( args, int );
639 if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
640 i_int != ACCESS_SET_PRIVATE_ID_CA &&
641 i_int != ACCESS_GET_PRIVATE_ID_STATE &&
642 i_int != ACCESS_SET_TITLE &&
643 i_int != ACCESS_SET_SEEKPOINT )
645 msg_Err( s, "Hey, what are you thinking ?"
646 "DON'T USE STREAM_CONTROL_ACCESS !!!" );
649 int i_ret = access_vaControl( p_access, i_int, args );
650 if( i_int == ACCESS_SET_TITLE || i_int == ACCESS_SET_SEEKPOINT )
651 AStreamControlReset( s );
655 case STREAM_UPDATE_SIZE:
656 AStreamControlUpdate( s );
659 case STREAM_GET_CONTENT_TYPE:
660 return access_Control( p_access, ACCESS_GET_CONTENT_TYPE,
661 va_arg( args, char ** ) );
662 case STREAM_SET_RECORD_STATE:
664 msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
670 /****************************************************************************
672 ****************************************************************************/
673 static void AStreamPrebufferBlock( stream_t *s )
675 stream_sys_t *p_sys = s->p_sys;
676 access_t *p_access = p_sys->p_access;
681 msg_Dbg( s, "pre buffering" );
685 const int64_t i_date = mdate();
689 if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE )
694 p_sys->stat.i_bytes = p_sys->block.i_size;
695 p_sys->stat.i_read_time = i_date - i_start;
696 i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
697 (p_sys->stat.i_read_time + 1);
699 msg_Dbg( s, "prebuffering done %"PRId64" bytes in %"PRId64"s - "
700 "%"PRId64" kbytes/s",
702 p_sys->stat.i_read_time / INT64_C(1000000),
708 if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
717 /* Append the block */
718 p_sys->block.i_size += b->i_buffer;
719 *p_sys->block.pp_last = b;
720 p_sys->block.pp_last = &b->p_next;
722 p_sys->stat.i_read_count++;
729 msg_Dbg( s, "received first data after %d ms",
730 (int)((i_first-i_start)/1000) );
734 p_sys->block.p_current = p_sys->block.p_first;
737 static int AStreamRefillBlock( stream_t *s );
739 static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read )
741 stream_sys_t *p_sys = s->p_sys;
743 uint8_t *p_data = p_read;
744 unsigned int i_data = 0;
747 if( p_sys->block.p_current == NULL )
752 /* seek within this stream if possible, else use plain old read and discard */
753 stream_sys_t *p_sys = s->p_sys;
754 access_t *p_access = p_sys->p_access;
756 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
758 return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
761 while( i_data < i_read )
764 p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
765 unsigned int i_copy = __MIN( (unsigned int)__MAX(i_current,0), i_read - i_data);
771 &p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
777 p_sys->block.i_offset += i_copy;
778 if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
780 /* Current block is now empty, switch to next */
781 if( p_sys->block.p_current )
783 p_sys->block.i_offset = 0;
784 p_sys->block.p_current = p_sys->block.p_current->p_next;
786 /*Get a new block if needed */
787 if( !p_sys->block.p_current && AStreamRefillBlock( s ) )
794 p_sys->i_pos += i_data;
798 static int AStreamPeekBlock( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
800 stream_sys_t *p_sys = s->p_sys;
802 unsigned int i_data = 0;
804 unsigned int i_offset;
806 if( p_sys->block.p_current == NULL ) return 0; /* EOF */
808 /* We can directly give a pointer over our buffer */
809 if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
811 *pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
815 /* We need to create a local copy */
816 if( p_sys->i_peek < i_read )
818 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
824 p_sys->i_peek = i_read;
827 /* Fill enough data */
828 while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
831 block_t **pp_last = p_sys->block.pp_last;
833 if( AStreamRefillBlock( s ) ) break;
835 /* Our buffer are probably filled enough, don't try anymore */
836 if( pp_last == p_sys->block.pp_last ) break;
839 /* Copy what we have */
840 b = p_sys->block.p_current;
841 i_offset = p_sys->block.i_offset;
842 p_data = p_sys->p_peek;
844 while( b && i_data < i_read )
846 unsigned int i_current = __MAX(b->i_buffer - i_offset,0);
847 int i_copy = __MIN( i_current, i_read - i_data );
849 memcpy( p_data, &b->p_buffer[i_offset], i_copy );
854 if( i_offset >= b->i_buffer )
861 *pp_peek = p_sys->p_peek;
865 static int AStreamSeekBlock( stream_t *s, int64_t i_pos )
867 stream_sys_t *p_sys = s->p_sys;
868 access_t *p_access = p_sys->p_access;
869 int64_t i_offset = i_pos - p_sys->block.i_start;
872 /* We already have thoses data, just update p_current/i_offset */
873 if( i_offset >= 0 && i_offset < p_sys->block.i_size )
875 block_t *b = p_sys->block.p_first;
878 while( i_current + b->i_buffer < i_offset )
880 i_current += b->i_buffer;
884 p_sys->block.p_current = b;
885 p_sys->block.i_offset = i_offset - i_current;
887 p_sys->i_pos = i_pos;
892 /* We may need to seek or to read data */
896 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
900 msg_Err( s, "backward seeking impossible (access not seekable)" );
908 bool b_aseek, b_aseekfast;
910 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
911 access_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
916 msg_Warn( s, "%"PRId64" bytes need to be skipped "
917 "(access non seekable)",
918 i_offset - p_sys->block.i_size );
922 int64_t i_skip = i_offset - p_sys->block.i_size;
924 /* Avg bytes per packets */
925 int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
926 /* TODO compute a seek cost instead of fixed threshold */
927 int i_th = b_aseekfast ? 1 : 5;
929 if( i_skip <= i_th * i_avg &&
930 i_skip < STREAM_CACHE_SIZE )
935 msg_Dbg( s, "b_seek=%d th*avg=%d skip=%"PRId64,
936 b_seek, i_th*i_avg, i_skip );
942 int64_t i_start, i_end;
943 /* Do the access seek */
945 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
949 block_ChainRelease( p_sys->block.p_first );
952 p_sys->block.i_start = p_sys->i_pos = i_pos;
953 p_sys->block.i_offset = 0;
954 p_sys->block.p_current = NULL;
955 p_sys->block.i_size = 0;
956 p_sys->block.p_first = NULL;
957 p_sys->block.pp_last = &p_sys->block.p_first;
960 if( AStreamRefillBlock( s ) )
964 p_sys->stat.i_seek_time += i_end - i_start;
965 p_sys->stat.i_seek_count++;
972 /* Read and skip enough data */
973 if( AStreamRefillBlock( s ) )
976 while( p_sys->block.p_current &&
977 p_sys->i_pos + p_sys->block.p_current->i_buffer - p_sys->block.i_offset < i_pos )
979 p_sys->i_pos += p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
980 p_sys->block.p_current = p_sys->block.p_current->p_next;
981 p_sys->block.i_offset = 0;
984 while( p_sys->block.i_start + p_sys->block.i_size < i_pos );
986 p_sys->block.i_offset = i_pos - p_sys->i_pos;
987 p_sys->i_pos = i_pos;
995 static int AStreamRefillBlock( stream_t *s )
997 stream_sys_t *p_sys = s->p_sys;
998 int64_t i_start, i_stop;
1002 while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
1003 p_sys->block.p_first != p_sys->block.p_current )
1005 block_t *b = p_sys->block.p_first;
1007 p_sys->block.i_start += b->i_buffer;
1008 p_sys->block.i_size -= b->i_buffer;
1009 p_sys->block.p_first = b->p_next;
1013 if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
1014 p_sys->block.p_current == p_sys->block.p_first &&
1015 p_sys->block.p_current->p_next ) /* At least 2 packets */
1017 /* Enough data, don't read more */
1021 /* Now read a new block */
1028 return VLC_EGENERIC;
1031 if( ( b = AReadBlock( s, &b_eof ) ) )
1034 return VLC_EGENERIC;
1041 /* Append the block */
1042 p_sys->block.i_size += b->i_buffer;
1043 *p_sys->block.pp_last = b;
1044 p_sys->block.pp_last = &b->p_next;
1047 if( p_sys->block.p_current == NULL )
1048 p_sys->block.p_current = b;
1051 p_sys->stat.i_bytes += b->i_buffer;
1052 p_sys->stat.i_read_time += i_stop - i_start;
1053 p_sys->stat.i_read_count++;
1062 /****************************************************************************
1064 ****************************************************************************/
1065 static int AStreamRefillStream( stream_t *s );
1067 static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read )
1069 stream_sys_t *p_sys = s->p_sys;
1070 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1072 uint8_t *p_data = (uint8_t *)p_read;
1073 unsigned int i_data = 0;
1075 if( tk->i_start >= tk->i_end )
1078 if( p_data == NULL )
1080 /* seek within this stream if possible, else use plain old read and discard */
1081 stream_sys_t *p_sys = s->p_sys;
1082 access_t *p_access = p_sys->p_access;
1084 /* seeking after EOF is not what we want */
1085 if( !( p_access->info.b_eof ) )
1088 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1090 return AStreamSeekStream( s, p_sys->i_pos + i_read ) ? 0 : i_read;
1095 msg_Dbg( s, "AStreamReadStream: %d pos=%"PRId64" tk=%d start=%"PRId64
1096 " offset=%d end=%"PRId64,
1097 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1098 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1101 while( i_data < i_read )
1103 int i_off = (tk->i_start + p_sys->stream.i_offset) %
1104 STREAM_CACHE_TRACK_SIZE;
1105 unsigned int i_current =
1106 __MAX(0,__MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
1107 STREAM_CACHE_TRACK_SIZE - i_off ));
1108 int i_copy = __MIN( i_current, i_read - i_data );
1110 if( i_copy <= 0 ) break; /* EOF */
1113 /* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
1116 memcpy( p_data, &tk->p_buffer[i_off], i_copy );
1120 p_sys->stream.i_offset += i_copy;
1122 /* Update pos now */
1123 p_sys->i_pos += i_copy;
1126 p_sys->stream.i_used += i_copy;
1127 if( tk->i_start + p_sys->stream.i_offset >= tk->i_end ||
1128 p_sys->stream.i_used >= p_sys->stream.i_read_size )
1130 if( p_sys->stream.i_used < i_read - i_data )
1131 p_sys->stream.i_used = __MIN( i_read - i_data, STREAM_READ_ATONCE * 10 );
1133 if( AStreamRefillStream( s ) )
1136 if( tk->i_start >= tk->i_end ) break;
1144 static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
1146 stream_sys_t *p_sys = s->p_sys;
1147 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1150 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
1153 msg_Dbg( s, "AStreamPeekStream: %d pos=%"PRId64" tk=%d "
1154 "start=%"PRId64" offset=%d end=%"PRId64,
1155 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1156 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1159 /* Avoid problem, but that should *never* happen */
1160 if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
1161 i_read = STREAM_CACHE_TRACK_SIZE / 2;
1163 while( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1165 if( p_sys->stream.i_used <= 1 )
1167 /* Be sure we will read something */
1168 p_sys->stream.i_used += i_read -
1169 (tk->i_end - tk->i_start - p_sys->stream.i_offset);
1171 if( AStreamRefillStream( s ) ) break;
1174 if( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1175 i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
1177 /* Now, direct pointer or a copy ? */
1178 i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1179 if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
1181 *pp_peek = &tk->p_buffer[i_off];
1185 if( p_sys->i_peek < i_read )
1187 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
1188 if( !p_sys->p_peek )
1193 p_sys->i_peek = i_read;
1196 memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
1197 STREAM_CACHE_TRACK_SIZE - i_off );
1198 memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
1199 &tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
1201 *pp_peek = p_sys->p_peek;
1205 static int AStreamSeekStream( stream_t *s, int64_t i_pos )
1207 stream_sys_t *p_sys = s->p_sys;
1208 access_t *p_access = p_sys->p_access;
1216 msg_Dbg( s, "AStreamSeekStream: to %"PRId64" pos=%"PRId64
1217 " tk=%d start=%"PRId64" offset=%d end=%"PRId64,
1218 i_pos, p_sys->i_pos, p_sys->stream.i_tk,
1219 p_sys->stream.tk[p_sys->stream.i_tk].i_start,
1220 p_sys->stream.i_offset,
1221 p_sys->stream.tk[p_sys->stream.i_tk].i_end );
1225 /* Seek in our current track ? */
1226 if( i_pos >= p_sys->stream.tk[p_sys->stream.i_tk].i_start &&
1227 i_pos < p_sys->stream.tk[p_sys->stream.i_tk].i_end )
1229 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1231 msg_Dbg( s, "AStreamSeekStream: current track" );
1233 p_sys->i_pos = i_pos;
1234 p_sys->stream.i_offset = i_pos - tk->i_start;
1236 /* If there is not enough data left in the track, refill */
1237 /* \todo How to get a correct value for
1238 * - refilling threshold
1239 * - how much to refill
1241 if( (tk->i_end - tk->i_start ) - p_sys->stream.i_offset <
1242 p_sys->stream.i_read_size )
1244 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1246 p_sys->stream.i_used = STREAM_READ_ATONCE / 2 ;
1247 AStreamRefillStream( s );
1253 access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1256 /* We can't do nothing */
1257 msg_Dbg( s, "AStreamSeekStream: can't seek" );
1258 return VLC_EGENERIC;
1261 /* Date the current track */
1262 p_sys->stream.tk[p_sys->stream.i_tk].i_date = mdate();
1264 /* Try to reuse already read data */
1265 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1267 stream_track_t *tk = &p_sys->stream.tk[i];
1269 if( i_pos >= tk->i_start && i_pos <= tk->i_end )
1272 msg_Dbg( s, "AStreamSeekStream: reusing %d start=%"PRId64
1273 " end=%"PRId64, i, tk->i_start, tk->i_end );
1276 /* Seek at the end of the buffer */
1277 if( ASeek( s, tk->i_end ) ) return VLC_EGENERIC;
1280 p_sys->i_pos = i_pos;
1281 p_sys->stream.i_tk = i;
1282 p_sys->stream.i_offset = i_pos - tk->i_start;
1284 if( p_sys->stream.i_used < 1024 )
1285 p_sys->stream.i_used = 1024;
1287 if( AStreamRefillStream( s ) && i_pos == tk->i_end )
1288 return VLC_EGENERIC;
1294 access_Control( p_access, ACCESS_CAN_SEEK, &b_afastseek );
1295 /* FIXME compute seek cost (instead of static 'stupid' value) */
1296 i_maxth = __MIN( p_sys->stream.i_read_size, STREAM_READ_ATONCE / 2 );
1302 /* Search closest segment TODO */
1303 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1305 stream_track_t *tk = &p_sys->stream.tk[i];
1307 if( i_pos + i_maxth >= tk->i_start )
1309 msg_Dbg( s, "good segment before current pos, TODO" );
1311 if( i_pos - i_maxth <= tk->i_end )
1313 msg_Dbg( s, "good segment after current pos, TODO" );
1318 /* Nothing good, seek and choose oldest segment */
1319 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
1320 p_sys->i_pos = i_pos;
1323 for( i = 1; i < STREAM_CACHE_TRACK; i++ )
1325 if( p_sys->stream.tk[i].i_date < p_sys->stream.tk[i_new].i_date )
1329 /* Reset the segment */
1330 p_sys->stream.i_tk = i_new;
1331 p_sys->stream.i_offset = 0;
1332 p_sys->stream.tk[i_new].i_start = i_pos;
1333 p_sys->stream.tk[i_new].i_end = i_pos;
1336 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1337 p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
1339 if( AStreamRefillStream( s ) )
1340 return VLC_EGENERIC;
1345 static int AStreamRefillStream( stream_t *s )
1347 stream_sys_t *p_sys = s->p_sys;
1348 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1350 /* We read but won't increase i_start after initial start + offset */
1352 __MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
1353 (tk->i_end - tk->i_start - p_sys->stream.i_offset) );
1354 bool b_read = false;
1355 int64_t i_start, i_stop;
1357 if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
1360 msg_Dbg( s, "AStreamRefillStream: used=%d toread=%d",
1361 p_sys->stream.i_used, i_toread );
1365 while( i_toread > 0 )
1367 int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
1371 return VLC_EGENERIC;
1373 i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
1374 i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
1376 /* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
1381 else if( i_read == 0 )
1384 return VLC_EGENERIC;
1390 tk->i_end += i_read;
1392 /* Windows of STREAM_CACHE_TRACK_SIZE */
1393 if( tk->i_end - tk->i_start > STREAM_CACHE_TRACK_SIZE )
1395 int i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
1397 tk->i_start += i_invalid;
1398 p_sys->stream.i_offset -= i_invalid;
1402 p_sys->stream.i_used -= i_read;
1404 p_sys->stat.i_bytes += i_read;
1405 p_sys->stat.i_read_count++;
1409 p_sys->stat.i_read_time += i_stop - i_start;
1414 static void AStreamPrebufferStream( stream_t *s )
1416 stream_sys_t *p_sys = s->p_sys;
1417 access_t *p_access = p_sys->p_access;
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;
1546 p_input = (input_thread_t *)vlc_object_find( s, VLC_OBJECT_INPUT, FIND_PARENT );
1547 if( p_input != NULL)
1549 var_Create( p_input, "subsdec-encoding", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
1550 var_SetString( p_input, "subsdec-encoding", "UTF-8" );
1551 vlc_object_release( p_input );
1556 if( i_data % s->p_text->i_char_width )
1558 /* keep i_char_width boundary */
1559 i_data = i_data - ( i_data % s->p_text->i_char_width );
1560 msg_Warn( s, "the read is not i_char_width compatible");
1566 /* Check if there is an EOL */
1567 if( s->p_text->i_char_width == 1 )
1569 /* UTF-8: 0A <LF> */
1570 psz_eol = memchr( p_data, '\n', i_data );
1574 const uint8_t *p = p_data;
1575 const uint8_t *p_last = p + i_data - s->p_text->i_char_width;
1577 if( s->p_text->i_char_width == 2 )
1579 if( s->p_text->b_little_endian == true)
1581 /* UTF-16LE: 0A 00 <LF> */
1582 while( p <= p_last && ( p[0] != 0x0A || p[1] != 0x00 ) )
1587 /* UTF-16BE: 00 0A <LF> */
1588 while( p <= p_last && ( p[1] != 0x0A || p[0] != 0x00 ) )
1599 psz_eol = (char *)p + ( s->p_text->i_char_width - 1 );
1605 i_data = (psz_eol - (char *)p_data) + 1;
1606 p_line = realloc( p_line, i_line + i_data + s->p_text->i_char_width ); /* add \0 */
1609 i_data = stream_Read( s, &p_line[i_line], i_data );
1610 if( i_data <= 0 ) break; /* Hmmm */
1611 i_line += i_data - s->p_text->i_char_width; /* skip \n */;
1614 /* We have our line */
1618 /* Read data (+1 for easy \0 append) */
1619 p_line = realloc( p_line, i_line + STREAM_PROBE_LINE + s->p_text->i_char_width );
1622 i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
1623 if( i_data <= 0 ) break; /* Hmmm */
1631 for( j = 0; j < s->p_text->i_char_width; j++ )
1633 p_line[i_line + j] = '\0';
1635 i_line += s->p_text->i_char_width; /* the added \0 */
1636 if( s->p_text->i_char_width > 1 )
1638 size_t i_in = 0, i_out = 0;
1639 const char * p_in = NULL;
1640 char * p_out = NULL;
1641 char * psz_new_line = NULL;
1644 psz_new_line = malloc( i_line );
1645 if( psz_new_line == NULL )
1647 i_in = i_out = (size_t)i_line;
1649 p_out = psz_new_line;
1651 if( vlc_iconv( s->p_text->conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
1653 msg_Err( s, "iconv failed" );
1654 msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
1657 p_line = psz_new_line;
1658 i_line = (size_t)i_line - i_out; /* does not include \0 */
1661 /* Remove trailing LF/CR */
1662 while( i_line >= 2 && ( p_line[i_line-2] == '\r' ||
1663 p_line[i_line-2] == '\n') ) i_line--;
1665 /* Make sure the \0 is there */
1666 p_line[i_line-1] = '\0';
1672 /* We failed to read any data, probably EOF */
1676 if( s->p_text->conv != (vlc_iconv_t)(-1) )
1677 vlc_iconv_close( s->p_text->conv );
1678 s->p_text->conv = (vlc_iconv_t)(-1);
1682 /****************************************************************************
1683 * Access reading/seeking wrappers to handle concatenated streams.
1684 ****************************************************************************/
1685 static int AReadStream( stream_t *s, void *p_read, unsigned int i_read )
1687 stream_sys_t *p_sys = s->p_sys;
1688 access_t *p_access = p_sys->p_access;
1689 input_thread_t *p_input = NULL;
1690 int i_read_orig = i_read;
1693 if( s->p_parent && s->p_parent->p_parent &&
1694 s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
1695 p_input = (input_thread_t *)s->p_parent->p_parent;
1697 if( !p_sys->i_list )
1699 i_read = p_access->pf_read( p_access, p_read, i_read );
1700 if( p_access->b_die )
1701 vlc_object_kill( s );
1704 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1705 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read,
1707 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1708 (float)i_total, NULL );
1709 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1710 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1715 i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
1717 if( p_access->b_die )
1718 vlc_object_kill( s );
1720 /* If we reached an EOF then switch to the next stream in the list */
1721 if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
1723 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1724 access_t *p_list_access;
1726 msg_Dbg( s, "opening input `%s'", psz_name );
1728 p_list_access = access_New( s, p_access->psz_access, "", psz_name );
1730 if( !p_list_access ) return 0;
1732 if( p_sys->p_list_access != p_access )
1733 access_Delete( p_sys->p_list_access );
1735 p_sys->p_list_access = p_list_access;
1737 /* We have to read some data */
1738 return AReadStream( s, p_read, i_read_orig );
1741 /* Update read bytes in input */
1744 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1745 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read, &i_total );
1746 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1747 (float)i_total, NULL );
1748 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1749 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1754 static block_t *AReadBlock( stream_t *s, bool *pb_eof )
1756 stream_sys_t *p_sys = s->p_sys;
1757 access_t *p_access = p_sys->p_access;
1758 input_thread_t *p_input = NULL;
1763 if( s->p_parent && s->p_parent->p_parent &&
1764 s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
1765 p_input = (input_thread_t *)s->p_parent->p_parent;
1767 if( !p_sys->i_list )
1769 p_block = p_access->pf_block( p_access );
1770 if( p_access->b_die )
1771 vlc_object_kill( s );
1772 if( pb_eof ) *pb_eof = p_access->info.b_eof;
1773 if( p_input && p_block && libvlc_stats (p_access) )
1775 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1776 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1777 p_block->i_buffer, &i_total );
1778 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1779 (float)i_total, NULL );
1780 stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
1781 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1786 p_block = p_sys->p_list_access->pf_block( p_sys->p_list_access );
1787 if( p_access->b_die )
1788 vlc_object_kill( s );
1789 b_eof = p_sys->p_list_access->info.b_eof;
1790 if( pb_eof ) *pb_eof = b_eof;
1792 /* If we reached an EOF then switch to the next stream in the list */
1793 if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
1795 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1796 access_t *p_list_access;
1798 msg_Dbg( s, "opening input `%s'", psz_name );
1800 p_list_access = access_New( s, p_access->psz_access, "", psz_name );
1802 if( !p_list_access ) return 0;
1804 if( p_sys->p_list_access != p_access )
1805 access_Delete( p_sys->p_list_access );
1807 p_sys->p_list_access = p_list_access;
1809 /* We have to read some data */
1810 return AReadBlock( s, pb_eof );
1816 vlc_mutex_lock( &p_input->p->counters.counters_lock );
1817 stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
1818 p_block->i_buffer, &i_total );
1819 stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
1820 (float)i_total, NULL );
1821 stats_UpdateInteger( s, p_input->p->counters.p_read_packets,
1823 vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1829 static int ASeek( stream_t *s, int64_t i_pos )
1831 stream_sys_t *p_sys = s->p_sys;
1832 access_t *p_access = p_sys->p_access;
1834 /* Check which stream we need to access */
1840 access_t *p_list_access = 0;
1842 for( i = 0; i < p_sys->i_list - 1; i++ )
1844 if( i_pos < p_sys->list[i]->i_size + i_size ) break;
1845 i_size += p_sys->list[i]->i_size;
1847 psz_name = p_sys->list[i]->psz_path;
1849 if( i != p_sys->i_list_index )
1850 msg_Dbg( s, "opening input `%s'", psz_name );
1852 if( i != p_sys->i_list_index && i != 0 )
1855 access_New( s, p_access->psz_access, "", psz_name );
1857 else if( i != p_sys->i_list_index )
1859 p_list_access = p_access;
1864 if( p_sys->p_list_access != p_access )
1865 access_Delete( p_sys->p_list_access );
1867 p_sys->p_list_access = p_list_access;
1870 p_sys->i_list_index = i;
1871 return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
1875 return p_access->pf_seek( p_access, i_pos );
1880 * Try to read "i_read" bytes into a buffer pointed by "p_read". If
1881 * "p_read" is NULL then data are skipped instead of read. The return
1882 * value is the real numbers of bytes read/skip. If this value is less
1883 * than i_read that means that it's the end of the stream.
1885 int stream_Read( stream_t *s, void *p_read, int i_read )
1887 return s->pf_read( s, p_read, i_read );
1891 * Store in pp_peek a pointer to the next "i_peek" bytes in the stream
1892 * \return The real numbers of valid bytes, if it's less
1893 * or equal to 0, *pp_peek is invalid.
1894 * \note pp_peek is a pointer to internal buffer and it will be invalid as
1895 * soons as other stream_* functions are called.
1896 * \note Due to input limitation, it could be less than i_peek without meaning
1897 * the end of the stream (but only when you have i_peek >=
1898 * p_input->i_bufsize)
1900 int stream_Peek( stream_t *s, const uint8_t **pp_peek, int i_peek )
1902 return s->pf_peek( s, pp_peek, i_peek );
1906 * Use to control the "stream_t *". Look at #stream_query_e for
1907 * possible "i_query" value and format arguments. Return VLC_SUCCESS
1908 * if ... succeed ;) and VLC_EGENERIC if failed or unimplemented
1910 int stream_vaControl( stream_t *s, int i_query, va_list args )
1912 return s->pf_control( s, i_query, args );
1918 void stream_Delete( stream_t *s )
1923 int stream_Control( stream_t *s, int i_query, ... )
1929 return VLC_EGENERIC;
1931 va_start( args, i_query );
1932 i_result = s->pf_control( s, i_query, args );
1938 * Read "i_size" bytes and store them in a block_t.
1939 * It always read i_size bytes unless you are at the end of the stream
1940 * where it return what is available.
1942 block_t *stream_Block( stream_t *s, int i_size )
1944 if( i_size <= 0 ) return NULL;
1946 /* emulate block read */
1947 block_t *p_bk = block_New( s, i_size );
1950 int i_read = stream_Read( s, p_bk->p_buffer, i_size );
1953 p_bk->i_buffer = i_read;
1956 block_Release( p_bk );