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 *****************************************************************************/
26 #include <vlc/input.h>
29 #include "input_internal.h"
34 * - tune the 2 methods
35 * - compute cost for seek
36 * - improve stream mode seeking with closest segments
42 * One linked list of data read
44 * More complex scheme using mutliple track to avoid seeking
47 /* How many tracks we have, currently only used for stream mode */
48 #ifdef OPTIMIZE_MEMORY
49 # define STREAM_CACHE_TRACK 1
50 /* Max size of our cache 128Ko per track */
51 # define STREAM_CACHE_SIZE (STREAM_CACHE_TRACK*1024*128)
53 # define STREAM_CACHE_TRACK 3
54 /* Max size of our cache 4Mo per track */
55 # define STREAM_CACHE_SIZE (4*STREAM_CACHE_TRACK*1024*1024)
58 /* How many data we try to prebuffer */
59 #define STREAM_CACHE_PREBUFFER_SIZE (32767)
60 /* Maximum time we take to pre-buffer */
61 #define STREAM_CACHE_PREBUFFER_LENGTH (100*1000)
63 /* Method1: Simple, for pf_block.
64 * We get blocks and put them in the linked list.
65 * We release blocks once the total size is bigger than CACHE_BLOCK_SIZE
67 #define STREAM_DATA_WAIT 40000 /* Time between before a pf_block retry */
69 /* Method2: A bit more complex, for pf_read
70 * - We use ring buffers, only one if unseekable, all if seekable
71 * - Upon seek date current ring, then search if one ring match the pos,
72 * yes: switch to it, seek the access to match the end of the ring
73 * no: search the ring with i_end the closer to i_pos,
74 * if close enough, read data and use this ring
75 * else use the oldest ring, seek and use it.
77 * TODO: - with access non seekable: use all space available for only one ring, but
78 * we have to support seekable/non-seekable switch on the fly.
79 * - compute a good value for i_read_size
82 #define STREAM_READ_ATONCE 32767
83 #define STREAM_CACHE_TRACK_SIZE (STREAM_CACHE_SIZE/STREAM_CACHE_TRACK)
107 vlc_bool_t b_block; /* Block method (1) or stream */
109 int64_t i_pos; /* Current reading offset */
111 /* Method 1: pf_block */
114 int64_t i_start; /* Offset of block for p_first */
115 int i_offset; /* Offset for data in p_current */
116 block_t *p_current; /* Current block */
118 int i_size; /* Total amount of data in the list */
124 /* Method 2: for pf_read */
127 int i_offset; /* Buffer offset in the current track */
128 int i_tk; /* Current track */
129 stream_track_t tk[STREAM_CACHE_TRACK];
135 int i_used; /* Used since last read */
140 /* Peek temporary buffer */
144 /* Stat for both method */
147 vlc_bool_t b_fastseek; /* From access */
149 /* Stat about reading data */
150 int64_t i_read_count;
154 /* Stat about seek */
162 access_entry_t **list;
164 access_t *p_list_access;
166 /* Preparse mode ? */
171 static int AStreamReadBlock( stream_t *s, void *p_read, int i_read );
172 static int AStreamPeekBlock( stream_t *s, uint8_t **p_peek, int i_read );
173 static int AStreamSeekBlock( stream_t *s, int64_t i_pos );
174 static void AStreamPrebufferBlock( stream_t *s );
175 static block_t *AReadBlock( stream_t *s, vlc_bool_t *pb_eof );
178 static int AStreamReadStream( stream_t *s, void *p_read, int i_read );
179 static int AStreamPeekStream( stream_t *s, uint8_t **pp_peek, int i_read );
180 static int AStreamSeekStream( stream_t *s, int64_t i_pos );
181 static void AStreamPrebufferStream( stream_t *s );
182 static int AReadStream( stream_t *s, void *p_read, int i_read );
185 static int AStreamControl( stream_t *s, int i_query, va_list );
186 static void AStreamDestroy( stream_t *s );
187 static void UStreamDestroy( stream_t *s );
188 static int ASeek( stream_t *s, int64_t i_pos );
191 /****************************************************************************
192 * stream_UrlNew: create a stream from a access
193 ****************************************************************************/
194 stream_t *__stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
196 char *psz_access, *psz_demux, *psz_path, *psz_dup;
200 if( !psz_url ) return 0;
202 psz_dup = strdup( psz_url );
203 MRLSplit( p_parent, psz_dup, &psz_access, &psz_demux, &psz_path );
205 /* Now try a real access */
206 p_access = access2_New( p_parent, psz_access, psz_demux, psz_path, 0 );
209 if( p_access == NULL )
211 msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
215 if( !( p_res = stream_AccessNew( p_access, VLC_TRUE ) ) )
217 access2_Delete( p_access );
221 p_res->pf_destroy = UStreamDestroy;
225 stream_t *stream_AccessNew( access_t *p_access, vlc_bool_t b_quick )
227 stream_t *s = vlc_object_create( p_access, VLC_OBJECT_STREAM );
231 if( !s ) return NULL;
233 /* Attach it now, needed for b_die */
234 vlc_object_attach( s, p_access );
237 s->pf_read = NULL; /* Set up later */
239 s->pf_control= AStreamControl;
240 s->pf_destroy = AStreamDestroy;
242 s->p_sys = p_sys = malloc( sizeof( stream_sys_t ) );
244 /* UTF16 and UTF32 text file conversion */
246 s->b_little_endian = VLC_FALSE;
247 s->conv = (vlc_iconv_t)(-1);
250 p_sys->p_access = p_access;
251 p_sys->b_block = p_access->pf_block ? VLC_TRUE : VLC_FALSE;
252 p_sys->i_pos = p_access->info.i_pos;
255 access2_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
256 p_sys->stat.i_bytes = 0;
257 p_sys->stat.i_read_time = 0;
258 p_sys->stat.i_read_count = 0;
259 p_sys->stat.i_seek_count = 0;
260 p_sys->stat.i_seek_time = 0;
264 p_sys->i_list_index = 0;
265 p_sys->p_list_access = 0;
267 p_sys->b_quick = b_quick;
269 /* Get the additional list of inputs if any (for concatenation) */
270 if( (psz_list = var_CreateGetString( s, "input-list" )) && *psz_list )
272 access_entry_t *p_entry = malloc( sizeof(access_entry_t) );
273 char *psz_name, *psz_parser = psz_name = psz_list;
275 p_sys->p_list_access = p_access;
276 p_entry->i_size = p_access->info.i_size;
277 p_entry->psz_path = strdup( p_access->psz_path );
278 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
279 msg_Dbg( p_access, "adding file `%s', ("I64Fd" bytes)",
280 p_entry->psz_path, p_access->info.i_size );
282 while( psz_name && *psz_name )
284 psz_parser = strchr( psz_name, ',' );
285 if( psz_parser ) *psz_parser = 0;
287 psz_name = strdup( psz_name );
290 access_t *p_tmp = access2_New( p_access, p_access->psz_access,
295 psz_name = psz_parser;
296 if( psz_name ) psz_name++;
300 msg_Dbg( p_access, "adding file `%s', ("I64Fd" bytes)",
301 psz_name, p_tmp->info.i_size );
303 p_entry = malloc( sizeof(access_entry_t) );
304 p_entry->i_size = p_tmp->info.i_size;
305 p_entry->psz_path = psz_name;
306 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
308 access2_Delete( p_tmp );
311 psz_name = psz_parser;
312 if( psz_name ) psz_name++;
315 if( psz_list ) free( psz_list );
319 p_sys->p_peek = NULL;
323 s->pf_read = AStreamReadBlock;
324 s->pf_peek = AStreamPeekBlock;
326 /* Init all fields of p_sys->block */
327 p_sys->block.i_start = p_sys->i_pos;
328 p_sys->block.i_offset = 0;
329 p_sys->block.p_current = NULL;
330 p_sys->block.i_size = 0;
331 p_sys->block.p_first = NULL;
332 p_sys->block.pp_last = &p_sys->block.p_first;
334 /* Do the prebuffering */
335 AStreamPrebufferBlock( s );
337 if( p_sys->block.i_size <= 0 )
339 msg_Err( s, "cannot pre fill buffer" );
347 s->pf_read = AStreamReadStream;
348 s->pf_peek = AStreamPeekStream;
350 /* Allocate/Setup our tracks */
351 p_sys->stream.i_offset = 0;
352 p_sys->stream.i_tk = 0;
353 p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
354 p_sys->stream.i_used = 0;
355 access2_Control( p_access, ACCESS_GET_MTU,
356 &p_sys->stream.i_read_size );
357 if( p_sys->stream.i_read_size <= 0 )
358 p_sys->stream.i_read_size = STREAM_READ_ATONCE;
359 else if( p_sys->stream.i_read_size <= 256 )
360 p_sys->stream.i_read_size = 256;
362 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
364 p_sys->stream.tk[i].i_date = 0;
365 p_sys->stream.tk[i].i_start = p_sys->i_pos;
366 p_sys->stream.tk[i].i_end = p_sys->i_pos;
367 p_sys->stream.tk[i].p_buffer=
368 &p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
371 /* Do the prebuffering */
372 AStreamPrebufferStream( s );
374 if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
376 msg_Err( s, "cannot pre fill buffer" );
390 free( p_sys->stream.p_buffer );
393 vlc_object_detach( s );
394 vlc_object_destroy( s );
398 /****************************************************************************
400 ****************************************************************************/
401 static void AStreamDestroy( stream_t *s )
403 stream_sys_t *p_sys = s->p_sys;
405 vlc_object_detach( s );
407 if( p_sys->b_block ) block_ChainRelease( p_sys->block.p_first );
408 else free( p_sys->stream.p_buffer );
410 if( p_sys->p_peek ) free( p_sys->p_peek );
412 if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
413 access2_Delete( p_sys->p_list_access );
415 while( p_sys->i_list-- )
417 free( p_sys->list[p_sys->i_list]->psz_path );
418 free( p_sys->list[p_sys->i_list] );
419 if( !p_sys->i_list ) free( p_sys->list );
423 vlc_object_destroy( s );
426 static void UStreamDestroy( stream_t *s )
428 access_t *p_access = (access_t*)vlc_object_find( s, VLC_OBJECT_ACCESS, FIND_PARENT );
430 vlc_object_release( p_access );
431 access2_Delete( p_access );
434 /****************************************************************************
435 * stream_AccessReset:
436 ****************************************************************************/
437 void stream_AccessReset( stream_t *s )
439 stream_sys_t *p_sys = s->p_sys;
441 p_sys->i_pos = p_sys->p_access->info.i_pos;
445 block_ChainRelease( p_sys->block.p_first );
447 /* Init all fields of p_sys->block */
448 p_sys->block.i_start = p_sys->i_pos;
449 p_sys->block.i_offset = 0;
450 p_sys->block.p_current = NULL;
451 p_sys->block.i_size = 0;
452 p_sys->block.p_first = NULL;
453 p_sys->block.pp_last = &p_sys->block.p_first;
455 /* Do the prebuffering */
456 AStreamPrebufferBlock( s );
462 /* Setup our tracks */
463 p_sys->stream.i_offset = 0;
464 p_sys->stream.i_tk = 0;
465 p_sys->stream.i_used = 0;
467 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
469 p_sys->stream.tk[i].i_date = 0;
470 p_sys->stream.tk[i].i_start = p_sys->i_pos;
471 p_sys->stream.tk[i].i_end = p_sys->i_pos;
474 /* Do the prebuffering */
475 AStreamPrebufferStream( s );
479 /****************************************************************************
480 * stream_AccessUpdate:
481 ****************************************************************************/
482 void stream_AccessUpdate( stream_t *s )
484 stream_sys_t *p_sys = s->p_sys;
486 p_sys->i_pos = p_sys->p_access->info.i_pos;
491 for( i = 0; i < p_sys->i_list_index; i++ )
493 p_sys->i_pos += p_sys->list[i]->i_size;
498 /****************************************************************************
500 ****************************************************************************/
501 static int AStreamControl( stream_t *s, int i_query, va_list args )
503 stream_sys_t *p_sys = s->p_sys;
504 access_t *p_access = p_sys->p_access;
507 int64_t *pi_64, i_64;
512 case STREAM_GET_SIZE:
513 pi_64 = (int64_t*)va_arg( args, int64_t * );
514 if( s->p_sys->i_list )
518 for( i = 0; i < s->p_sys->i_list; i++ )
519 *pi_64 += s->p_sys->list[i]->i_size;
522 *pi_64 = p_access->info.i_size;
525 case STREAM_CAN_SEEK:
526 p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
527 access2_Control( p_access, ACCESS_CAN_SEEK, p_bool );
530 case STREAM_CAN_FASTSEEK:
531 p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
532 access2_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
535 case STREAM_GET_POSITION:
536 pi_64 = (int64_t*)va_arg( args, int64_t * );
537 *pi_64 = p_sys->i_pos;
540 case STREAM_SET_POSITION:
541 i_64 = (int64_t)va_arg( args, int64_t );
543 return AStreamSeekBlock( s, i_64 );
545 return AStreamSeekStream( s, i_64 );
550 case STREAM_CONTROL_ACCESS:
551 i_int = (int) va_arg( args, int );
552 if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
553 i_int != ACCESS_SET_PRIVATE_ID_CA &&
554 i_int != ACCESS_GET_PRIVATE_ID_STATE )
556 msg_Err( s, "Hey, what are you thinking ?"
557 "DON'T USE STREAM_CONTROL_ACCESS !!!" );
560 return access2_vaControl( p_access, i_int, args );
563 msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
571 /****************************************************************************
573 ****************************************************************************/
574 static void AStreamPrebufferBlock( stream_t *s )
576 stream_sys_t *p_sys = s->p_sys;
577 access_t *p_access = p_sys->p_access;
582 msg_Dbg( s, "pre buffering" );
586 int64_t i_date = mdate();
590 if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE ||
591 ( i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date ) )
596 p_sys->stat.i_bytes = p_sys->block.i_size;
597 p_sys->stat.i_read_time = i_date - i_start;
598 i_byterate = ( I64C(1000000) * p_sys->stat.i_bytes ) /
599 (p_sys->stat.i_read_time + 1);
601 msg_Dbg( s, "prebuffering done "I64Fd" bytes in "I64Fd"s - "
604 p_sys->stat.i_read_time / I64C(1000000),
610 if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
614 msleep( STREAM_DATA_WAIT );
620 /* Append the block */
621 p_sys->block.i_size += b->i_buffer;
622 *p_sys->block.pp_last = b;
623 p_sys->block.pp_last = &b->p_next;
625 p_sys->stat.i_read_count++;
629 if( p_access->info.b_prebuffered )
631 /* Access has already prebufferred - update stats and exit */
632 p_sys->stat.i_bytes = p_sys->block.i_size;
633 p_sys->stat.i_read_time = mdate() - i_start;
640 msg_Dbg( s, "received first data for our buffer");
645 p_sys->block.p_current = p_sys->block.p_first;
648 static int AStreamRefillBlock( stream_t *s );
650 static int AStreamReadBlock( stream_t *s, void *p_read, int i_read )
652 stream_sys_t *p_sys = s->p_sys;
654 uint8_t *p_data= (uint8_t*)p_read;
658 if( p_sys->block.p_current == NULL )
663 /* seek within this stream if possible, else use plain old read and discard */
664 stream_sys_t *p_sys = s->p_sys;
665 access_t *p_access = p_sys->p_access;
667 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
669 return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
672 while( i_data < i_read )
675 p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
676 int i_copy = __MIN( i_current, i_read - i_data);
682 &p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
688 p_sys->block.i_offset += i_copy;
689 if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
691 /* Current block is now empty, switch to next */
692 if( p_sys->block.p_current )
694 p_sys->block.i_offset = 0;
695 p_sys->block.p_current = p_sys->block.p_current->p_next;
698 if( AStreamRefillBlock( s ) )
705 p_sys->i_pos += i_data;
709 static int AStreamPeekBlock( stream_t *s, uint8_t **pp_peek, int i_read )
711 stream_sys_t *p_sys = s->p_sys;
717 if( p_sys->block.p_current == NULL ) return 0; /* EOF */
719 /* We can directly give a pointer over our buffer */
720 if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
722 *pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
726 /* We need to create a local copy */
727 if( p_sys->i_peek < i_read )
729 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
735 p_sys->i_peek = i_read;
738 /* Fill enough data */
739 while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
742 block_t **pp_last = p_sys->block.pp_last;
744 if( AStreamRefillBlock( s ) ) break;
746 /* Our buffer are probably filled enough, don't try anymore */
747 if( pp_last == p_sys->block.pp_last ) break;
750 /* Copy what we have */
751 b = p_sys->block.p_current;
752 i_offset = p_sys->block.i_offset;
753 p_data = p_sys->p_peek;
755 while( b && i_data < i_read )
757 int i_current = b->i_buffer - i_offset;
758 int i_copy = __MIN( i_current, i_read - i_data );
760 memcpy( p_data, &b->p_buffer[i_offset], i_copy );
765 if( i_offset >= b->i_buffer )
772 *pp_peek = p_sys->p_peek;
776 static int AStreamSeekBlock( stream_t *s, int64_t i_pos )
778 stream_sys_t *p_sys = s->p_sys;
779 access_t *p_access = p_sys->p_access;
780 int64_t i_offset = i_pos - p_sys->block.i_start;
783 /* We already have thoses data, just update p_current/i_offset */
784 if( i_offset >= 0 && i_offset < p_sys->block.i_size )
786 block_t *b = p_sys->block.p_first;
789 while( i_current + b->i_buffer < i_offset )
791 i_current += b->i_buffer;
795 p_sys->block.p_current = b;
796 p_sys->block.i_offset = i_offset - i_current;
798 p_sys->i_pos = i_pos;
803 /* We may need to seek or to read data */
807 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
811 msg_Err( s, "backward seeking impossible (access not seekable)" );
819 vlc_bool_t b_aseek, b_aseekfast;
821 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
822 access2_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
827 msg_Warn( s, I64Fd" bytes need to be skipped "
828 "(access non seekable)",
829 i_offset - p_sys->block.i_size );
833 int64_t i_skip = i_offset - p_sys->block.i_size;
835 /* Avg bytes per packets */
836 int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
837 /* TODO compute a seek cost instead of fixed threshold */
838 int i_th = b_aseekfast ? 1 : 5;
840 if( i_skip <= i_th * i_avg &&
841 i_skip < STREAM_CACHE_SIZE )
846 msg_Dbg( s, "b_seek=%d th*avg=%d skip="I64Fd,
847 b_seek, i_th*i_avg, i_skip );
853 int64_t i_start, i_end;
854 /* Do the access seek */
856 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
860 block_ChainRelease( p_sys->block.p_first );
863 p_sys->block.i_start = p_sys->i_pos = i_pos;
864 p_sys->block.i_offset = 0;
865 p_sys->block.p_current = NULL;
866 p_sys->block.i_size = 0;
867 p_sys->block.p_first = NULL;
868 p_sys->block.pp_last = &p_sys->block.p_first;
871 if( AStreamRefillBlock( s ) )
873 msg_Err( s, "cannot re fill buffer" );
877 p_sys->stat.i_seek_time += i_end - i_start;
878 p_sys->stat.i_seek_count++;
883 /* Read enough data */
884 while( p_sys->block.i_start + p_sys->block.i_size < i_pos )
886 if( AStreamRefillBlock( s ) )
888 msg_Err( s, "can't read enough data in seek" );
891 while( p_sys->block.p_current &&
892 p_sys->i_pos + p_sys->block.p_current->i_buffer < i_pos )
894 p_sys->i_pos += p_sys->block.p_current->i_buffer;
895 p_sys->block.p_current = p_sys->block.p_current->p_next;
899 p_sys->block.i_offset = i_pos - p_sys->i_pos;
900 p_sys->i_pos = i_pos;
909 static int AStreamRefillBlock( stream_t *s )
911 stream_sys_t *p_sys = s->p_sys;
912 int64_t i_start, i_stop;
916 while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
917 p_sys->block.p_first != p_sys->block.p_current )
919 block_t *b = p_sys->block.p_first;
921 p_sys->block.i_start += b->i_buffer;
922 p_sys->block.i_size -= b->i_buffer;
923 p_sys->block.p_first = b->p_next;
927 if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
928 p_sys->block.p_current == p_sys->block.p_first &&
929 p_sys->block.p_current->p_next ) /* At least 2 packets */
931 /* Enough data, don't read more */
935 /* Now read a new block */
941 if( s->b_die ) return VLC_EGENERIC;
945 if( ( b = AReadBlock( s, &b_eof ) ) ) break;
947 if( b_eof ) return VLC_EGENERIC;
949 msleep( STREAM_DATA_WAIT );
956 /* Append the block */
957 p_sys->block.i_size += b->i_buffer;
958 *p_sys->block.pp_last = b;
959 p_sys->block.pp_last = &b->p_next;
962 if( p_sys->block.p_current == NULL )
963 p_sys->block.p_current = b;
966 p_sys->stat.i_bytes += b->i_buffer;
967 p_sys->stat.i_read_time += i_stop - i_start;
968 p_sys->stat.i_read_count++;
977 /****************************************************************************
979 ****************************************************************************/
980 static int AStreamRefillStream( stream_t *s );
982 static int AStreamReadStream( stream_t *s, void *p_read, int i_read )
984 stream_sys_t *p_sys = s->p_sys;
985 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
987 uint8_t *p_data = (uint8_t *)p_read;
990 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
994 /* seek within this stream if possible, else use plain old read and discard */
995 stream_sys_t *p_sys = s->p_sys;
996 access_t *p_access = p_sys->p_access;
998 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1000 return AStreamSeekStream( s, p_sys->i_pos + i_read ) ? 0 : i_read;
1004 msg_Dbg( s, "AStreamReadStream: %d pos="I64Fd" tk=%d start="I64Fd
1005 " offset=%d end="I64Fd,
1006 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1007 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1010 while( i_data < i_read )
1012 int i_off = (tk->i_start + p_sys->stream.i_offset) %
1013 STREAM_CACHE_TRACK_SIZE;
1015 __MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
1016 STREAM_CACHE_TRACK_SIZE - i_off );
1017 int i_copy = __MIN( i_current, i_read - i_data );
1019 if( i_copy <= 0 ) break; /* EOF */
1022 /* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
1025 memcpy( p_data, &tk->p_buffer[i_off], i_copy );
1029 p_sys->stream.i_offset += i_copy;
1031 /* Update pos now */
1032 p_sys->i_pos += i_copy;
1035 p_sys->stream.i_used += i_copy;
1036 if( tk->i_start + p_sys->stream.i_offset >= tk->i_end ||
1037 p_sys->stream.i_used >= p_sys->stream.i_read_size )
1039 if( AStreamRefillStream( s ) )
1042 if( tk->i_start >= tk->i_end ) break;
1050 static int AStreamPeekStream( stream_t *s, uint8_t **pp_peek, int i_read )
1052 stream_sys_t *p_sys = s->p_sys;
1053 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1056 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
1059 msg_Dbg( s, "AStreamPeekStream: %d pos="I64Fd" tk=%d "
1060 "start="I64Fd" offset=%d end="I64Fd,
1061 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1062 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1065 /* Avoid problem, but that should *never* happen */
1066 if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
1067 i_read = STREAM_CACHE_TRACK_SIZE / 2;
1069 while( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1071 if( p_sys->stream.i_used <= 1 )
1073 /* Be sure we will read something */
1074 p_sys->stream.i_used += i_read -
1075 (tk->i_end - tk->i_start - p_sys->stream.i_offset);
1077 if( AStreamRefillStream( s ) ) break;
1080 if( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1081 i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
1083 /* Now, direct pointer or a copy ? */
1084 i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1085 if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
1087 *pp_peek = &tk->p_buffer[i_off];
1091 if( p_sys->i_peek < i_read )
1093 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
1094 if( !p_sys->p_peek )
1099 p_sys->i_peek = i_read;
1102 memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
1103 STREAM_CACHE_TRACK_SIZE - i_off );
1104 memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
1105 &tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
1107 *pp_peek = p_sys->p_peek;
1111 static int AStreamSeekStream( stream_t *s, int64_t i_pos )
1113 stream_sys_t *p_sys = s->p_sys;
1114 access_t *p_access = p_sys->p_access;
1116 vlc_bool_t b_afastseek;
1122 msg_Dbg( s, "AStreamSeekStream: to "I64Fd" pos="I64Fd
1123 " tk=%d start="I64Fd" offset=%d end="I64Fd,
1124 i_pos, p_sys->i_pos, p_sys->stream.i_tk,
1125 p_sys->stream.tk[p_sys->stream.i_tk].i_start,
1126 p_sys->stream.i_offset,
1127 p_sys->stream.tk[p_sys->stream.i_tk].i_end );
1131 /* Seek in our current track ? */
1132 if( i_pos >= p_sys->stream.tk[p_sys->stream.i_tk].i_start &&
1133 i_pos < p_sys->stream.tk[p_sys->stream.i_tk].i_end )
1135 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1137 msg_Dbg( s, "AStreamSeekStream: current track" );
1139 p_sys->i_pos = i_pos;
1140 p_sys->stream.i_offset = i_pos - tk->i_start;
1142 /* If there is not enough data left in the track, refill */
1143 /* \todo How to get a correct value for
1144 * - refilling threshold
1145 * - how much to refill
1147 if( (tk->i_end - tk->i_start ) - p_sys->stream.i_offset <
1148 p_sys->stream.i_read_size )
1150 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1152 p_sys->stream.i_used = STREAM_READ_ATONCE / 2 ;
1153 AStreamRefillStream( s );
1159 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1162 /* We can't do nothing */
1163 msg_Dbg( s, "AStreamSeekStream: can't seek" );
1164 return VLC_EGENERIC;
1167 /* Date the current track */
1168 p_sys->stream.tk[p_sys->stream.i_tk].i_date = mdate();
1170 /* Try to reuse already read data */
1171 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1173 stream_track_t *tk = &p_sys->stream.tk[i];
1175 if( i_pos >= tk->i_start && i_pos <= tk->i_end )
1178 msg_Dbg( s, "AStreamSeekStream: reusing %d start="I64Fd
1179 " end="I64Fd, i, tk->i_start, tk->i_end );
1182 /* Seek at the end of the buffer */
1183 if( ASeek( s, tk->i_end ) ) return VLC_EGENERIC;
1186 p_sys->i_pos = i_pos;
1187 p_sys->stream.i_tk = i;
1188 p_sys->stream.i_offset = i_pos - tk->i_start;
1190 if( p_sys->stream.i_used < 1024 )
1191 p_sys->stream.i_used = 1024;
1193 if( AStreamRefillStream( s ) && i_pos == tk->i_end )
1194 return VLC_EGENERIC;
1200 access2_Control( p_access, ACCESS_CAN_SEEK, &b_afastseek );
1201 /* FIXME compute seek cost (instead of static 'stupid' value) */
1202 i_maxth = __MIN( p_sys->stream.i_read_size, STREAM_READ_ATONCE / 2 );
1208 /* Search closest segment TODO */
1209 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1211 stream_track_t *tk = &p_sys->stream.tk[i];
1213 if( i_pos + i_maxth >= tk->i_start )
1215 msg_Dbg( s, "good segment before current pos, TODO" );
1217 if( i_pos - i_maxth <= tk->i_end )
1219 msg_Dbg( s, "good segment after current pos, TODO" );
1224 /* Nothing good, seek and choose oldest segment */
1225 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
1226 p_sys->i_pos = i_pos;
1229 for( i = 1; i < STREAM_CACHE_TRACK; i++ )
1231 if( p_sys->stream.tk[i].i_date < p_sys->stream.tk[i_new].i_date )
1235 /* Reset the segment */
1236 p_sys->stream.i_tk = i_new;
1237 p_sys->stream.i_offset = 0;
1238 p_sys->stream.tk[i_new].i_start = i_pos;
1239 p_sys->stream.tk[i_new].i_end = i_pos;
1242 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1243 p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
1245 if( AStreamRefillStream( s ) )
1246 return VLC_EGENERIC;
1251 static int AStreamRefillStream( stream_t *s )
1253 stream_sys_t *p_sys = s->p_sys;
1254 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1256 /* We read but won't increase i_start after initial start + offset */
1258 __MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
1259 (tk->i_end - tk->i_start - p_sys->stream.i_offset) );
1260 vlc_bool_t b_read = VLC_FALSE;
1261 int64_t i_start, i_stop;
1263 if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
1266 msg_Dbg( s, "AStreamRefillStream: used=%d toread=%d",
1267 p_sys->stream.i_used, i_toread );
1271 while( i_toread > 0 )
1273 int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
1277 return VLC_EGENERIC;
1279 i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
1280 i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
1282 /* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
1285 msleep( STREAM_DATA_WAIT );
1288 else if( i_read == 0 )
1290 if( !b_read ) return VLC_EGENERIC;
1296 tk->i_end += i_read;
1298 /* Windows of STREAM_CACHE_TRACK_SIZE */
1299 if( tk->i_end - tk->i_start > STREAM_CACHE_TRACK_SIZE )
1301 int i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
1303 tk->i_start += i_invalid;
1304 p_sys->stream.i_offset -= i_invalid;
1308 p_sys->stream.i_used -= i_read;
1310 p_sys->stat.i_bytes += i_read;
1311 p_sys->stat.i_read_count++;
1315 p_sys->stat.i_read_time += i_stop - i_start;
1320 static void AStreamPrebufferStream( stream_t *s )
1322 stream_sys_t *p_sys = s->p_sys;
1323 access_t *p_access = p_sys->p_access;
1325 int64_t i_first = 0;
1327 int64_t i_prebuffer = p_sys->b_quick ? STREAM_CACHE_TRACK_SIZE /100 :
1328 ( (p_access->info.i_title > 1 || p_access->info.i_seekpoint > 1) ?
1329 STREAM_CACHE_PREBUFFER_SIZE : STREAM_CACHE_TRACK_SIZE / 3 );
1331 msg_Dbg( s, "pre-buffering..." );
1335 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1337 int64_t i_date = mdate();
1340 if( s->b_die || tk->i_end >= i_prebuffer ||
1341 (i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date) )
1346 p_sys->stat.i_bytes = tk->i_end - tk->i_start;
1347 p_sys->stat.i_read_time = i_date - i_start;
1348 i_byterate = ( I64C(1000000) * p_sys->stat.i_bytes ) /
1349 (p_sys->stat.i_read_time+1);
1351 msg_Dbg( s, "pre-buffering done "I64Fd" bytes in "I64Fd"s - "
1353 p_sys->stat.i_bytes,
1354 p_sys->stat.i_read_time / I64C(1000000),
1355 i_byterate / 1024 );
1360 i_read = STREAM_CACHE_TRACK_SIZE - tk->i_end;
1361 i_read = __MIN( p_sys->stream.i_read_size, i_read );
1362 i_read = AReadStream( s, &tk->p_buffer[tk->i_end], i_read );
1365 msleep( STREAM_DATA_WAIT );
1368 else if( i_read == 0 )
1377 msg_Dbg( s, "received first data for our buffer");
1380 tk->i_end += i_read;
1382 p_sys->stat.i_read_count++;
1387 /****************************************************************************
1389 ****************************************************************************/
1391 * Read from the stream untill first newline.
1392 * \param s Stream handle to read from
1393 * \return A pointer to the allocated output string. You need to free this when you are done.
1395 #define STREAM_PROBE_LINE 2048
1396 #define STREAM_LINE_MAX (2048*100)
1397 char * stream_ReadLine( stream_t *s )
1399 char *p_line = NULL;
1400 int i_line = 0, i_read = 0;
1402 while( i_read < STREAM_LINE_MAX )
1409 /* Probe new data */
1410 i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
1411 if( i_data <= 0 ) break; /* No more data */
1414 i_pos = stream_Tell( s );
1415 if( i_pos == 0 && i_data > 4 )
1418 char *psz_encoding = NULL;
1420 if( p_data[0] == 0xEF && p_data[1] == 0xBB && p_data[2] == 0xBF )
1422 psz_encoding = strdup( "UTF-8" );
1425 else if( p_data[0] == 0x00 && p_data[1] == 0x00 )
1427 if( p_data[2] == 0xFE && p_data[3] == 0xFF )
1429 psz_encoding = strdup( "UTF-32BE" );
1430 s->i_char_width = 4;
1434 else if( p_data[0] == 0xFF && p_data[1] == 0xFE )
1436 if( p_data[2] == 0x00 && p_data[3] == 0x00 )
1438 psz_encoding = strdup( "UTF-32LE" );
1439 s->i_char_width = 4;
1440 s->b_little_endian = VLC_TRUE;
1445 psz_encoding = strdup( "UTF-16LE" );
1446 s->b_little_endian = VLC_TRUE;
1447 s->i_char_width = 2;
1451 else if( p_data[0] == 0xFE && p_data[1] == 0xFF )
1453 psz_encoding = strdup( "UTF-16BE" );
1454 s->i_char_width = 2;
1458 /* Seek past the BOM */
1461 stream_Seek( s, i_bom_size );
1462 p_data += i_bom_size;
1463 i_data -= i_bom_size;
1466 /* Open the converter if we need it */
1467 if( psz_encoding != NULL )
1469 input_thread_t *p_input;
1470 msg_Dbg( s, "%s BOM detected", psz_encoding );
1471 p_input = (input_thread_t *)vlc_object_find( s, VLC_OBJECT_INPUT, FIND_PARENT );
1472 if( s->i_char_width > 1 )
1474 s->conv = vlc_iconv_open( "UTF-8", psz_encoding );
1475 if( s->conv == (vlc_iconv_t)-1 )
1477 msg_Err( s, "iconv_open failed" );
1480 if( p_input != NULL)
1482 var_Create( p_input, "subsdec-encoding", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
1483 var_SetString( p_input, "subsdec-encoding", "UTF-8" );
1484 vlc_object_release( p_input );
1486 if( psz_encoding ) free( psz_encoding );
1490 if( i_data % s->i_char_width )
1492 msg_Warn( s, "the read is not i_char_width compatible");
1495 /* Check if there is an EOL */
1496 if( ( psz_eol = memchr( p_data, '\n', i_data ) ) )
1498 if( s->b_little_endian == VLC_TRUE && s->i_char_width > 1 )
1500 psz_eol += ( s->i_char_width - 1 );
1502 i_data = (psz_eol - (char *)p_data) + 1;
1503 p_line = realloc( p_line, i_line + i_data + s->i_char_width ); /* add \0 */
1504 i_data = stream_Read( s, &p_line[i_line], i_data );
1505 if( i_data <= 0 ) break; /* Hmmm */
1506 i_line += i_data - s->i_char_width; /* skip \n */;
1509 /* We have our line */
1513 /* Read data (+1 for easy \0 append) */
1514 p_line = realloc( p_line, i_line + STREAM_PROBE_LINE + s->i_char_width );
1515 i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
1516 if( i_data <= 0 ) break; /* Hmmm */
1524 for( j = 0; j < s->i_char_width; j++ )
1526 p_line[i_line + j] = '\0';
1528 i_line += s->i_char_width; /* the added \0 */
1529 if( s->i_char_width > 1 )
1531 size_t i_in = 0, i_out = 0;
1532 const char * p_in = NULL;
1533 char * p_out = NULL;
1534 char * psz_new_line = NULL;
1537 psz_new_line = malloc( i_line );
1539 i_in = i_out = (size_t)i_line;
1541 p_out = psz_new_line;
1543 if( vlc_iconv( s->conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
1545 msg_Err( s, "iconv failed" );
1546 msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
1548 if( p_line ) free( p_line );
1549 p_line = psz_new_line;
1550 i_line = (size_t)i_line - i_out; /* does not include \0 */
1553 /* Remove trailing LF/CR */
1554 while( i_line > 0 && ( p_line[i_line-2] == '\r' ||
1555 p_line[i_line-2] == '\n') ) i_line--;
1557 /* Make sure the \0 is there */
1558 p_line[i_line-1] = '\0';
1563 /* We failed to read any data, probably EOF */
1564 if( p_line ) free( p_line );
1565 if( s->conv != (vlc_iconv_t)(-1) ) vlc_iconv_close( s->conv );
1569 /****************************************************************************
1570 * Access reading/seeking wrappers to handle concatenated streams.
1571 ****************************************************************************/
1572 static int AReadStream( stream_t *s, void *p_read, int i_read )
1574 stream_sys_t *p_sys = s->p_sys;
1575 access_t *p_access = p_sys->p_access;
1576 input_thread_t *p_input = NULL;
1577 int i_read_orig = i_read;
1580 if( s->p_parent && s->p_parent->p_parent &&
1581 s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
1582 p_input = (input_thread_t *)s->p_parent->p_parent;
1584 if( !p_sys->i_list )
1586 i_read = p_access->pf_read( p_access, p_read, i_read );
1589 vlc_object_yield( p_input );
1590 vlc_mutex_lock( &p_input->counters.counters_lock );
1591 stats_UpdateInteger( s, p_input->counters.p_read_bytes, i_read,
1593 stats_UpdateFloat( s, p_input->counters.p_input_bitrate,
1594 (float)i_total, NULL );
1595 stats_UpdateInteger( s, p_input->counters.p_read_packets, 1, NULL );
1596 vlc_mutex_unlock( &p_input->counters.counters_lock );
1597 vlc_object_release( p_input );
1602 i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
1605 /* If we reached an EOF then switch to the next stream in the list */
1606 if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
1608 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1609 access_t *p_list_access;
1611 msg_Dbg( s, "opening input `%s'", psz_name );
1613 p_list_access = access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1615 if( !p_list_access ) return 0;
1617 if( p_sys->p_list_access != p_access )
1618 access2_Delete( p_sys->p_list_access );
1620 p_sys->p_list_access = p_list_access;
1622 /* We have to read some data */
1623 return AReadStream( s, p_read, i_read_orig );
1626 /* Update read bytes in input */
1629 vlc_object_yield( p_input );
1630 vlc_mutex_lock( &p_input->counters.counters_lock );
1631 stats_UpdateInteger( s, p_input->counters.p_read_bytes, i_read, &i_total );
1632 stats_UpdateFloat( s, p_input->counters.p_input_bitrate,
1633 (float)i_total, NULL );
1634 stats_UpdateInteger( s, p_input->counters.p_read_packets, 1, NULL );
1635 vlc_mutex_unlock( &p_input->counters.counters_lock );
1636 vlc_object_release( p_input );
1641 static block_t *AReadBlock( stream_t *s, vlc_bool_t *pb_eof )
1643 stream_sys_t *p_sys = s->p_sys;
1644 access_t *p_access = p_sys->p_access;
1645 input_thread_t *p_input = NULL;
1650 if( s->p_parent && s->p_parent->p_parent &&
1651 s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
1652 p_input = (input_thread_t *)s->p_parent->p_parent;
1654 if( !p_sys->i_list )
1656 p_block = p_access->pf_block( p_access );
1657 if( pb_eof ) *pb_eof = p_access->info.b_eof;
1658 if( p_input && p_block && p_access->p_libvlc->b_stats )
1660 vlc_object_yield( p_input );
1661 vlc_mutex_lock( &p_input->counters.counters_lock );
1662 stats_UpdateInteger( s, p_input->counters.p_read_bytes,
1663 p_block->i_buffer, &i_total );
1664 stats_UpdateFloat( s, p_input->counters.p_input_bitrate,
1665 (float)i_total, NULL );
1666 stats_UpdateInteger( s, p_input->counters.p_read_packets, 1, NULL );
1667 vlc_mutex_unlock( &p_input->counters.counters_lock );
1668 vlc_object_release( p_input );
1673 p_block = p_sys->p_list_access->pf_block( p_access );
1674 b_eof = p_sys->p_list_access->info.b_eof;
1675 if( pb_eof ) *pb_eof = b_eof;
1677 /* If we reached an EOF then switch to the next stream in the list */
1678 if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
1680 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1681 access_t *p_list_access;
1683 msg_Dbg( s, "opening input `%s'", psz_name );
1685 p_list_access = access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1687 if( !p_list_access ) return 0;
1689 if( p_sys->p_list_access != p_access )
1690 access2_Delete( p_sys->p_list_access );
1692 p_sys->p_list_access = p_list_access;
1694 /* We have to read some data */
1695 return AReadBlock( s, pb_eof );
1701 vlc_object_yield( p_input );
1702 vlc_mutex_lock( &p_input->counters.counters_lock );
1703 stats_UpdateInteger( s, p_input->counters.p_read_bytes,
1704 p_block->i_buffer, &i_total );
1705 stats_UpdateFloat( s, p_input->counters.p_input_bitrate,
1706 (float)i_total, NULL );
1707 stats_UpdateInteger( s, p_input->counters.p_read_packets,
1709 vlc_mutex_unlock( &p_input->counters.counters_lock );
1710 vlc_object_release( p_input );
1716 static int ASeek( stream_t *s, int64_t i_pos )
1718 stream_sys_t *p_sys = s->p_sys;
1719 access_t *p_access = p_sys->p_access;
1721 /* Check which stream we need to access */
1727 access_t *p_list_access = 0;
1729 for( i = 0; i < p_sys->i_list - 1; i++ )
1731 if( i_pos < p_sys->list[i]->i_size + i_size ) break;
1732 i_size += p_sys->list[i]->i_size;
1734 psz_name = p_sys->list[i]->psz_path;
1736 if( i != p_sys->i_list_index )
1737 msg_Dbg( s, "opening input `%s'", psz_name );
1739 if( i != p_sys->i_list_index && i != 0 )
1742 access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1744 else if( i != p_sys->i_list_index )
1746 p_list_access = p_access;
1751 if( p_sys->p_list_access != p_access )
1752 access2_Delete( p_sys->p_list_access );
1754 p_sys->p_list_access = p_list_access;
1757 p_sys->i_list_index = i;
1758 return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
1762 return p_access->pf_seek( p_access, i_pos );