1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 1999-2004 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
26 #include <vlc/input.h>
28 #include "input_internal.h"
31 * - tune the 2 methods
32 * - compute cost for seek
33 * - improve stream mode seeking with closest segments
39 * One linked list of data read
41 * More complex scheme using mutliple track to avoid seeking
44 /* How many tracks we have, currently only used for stream mode */
45 #ifdef OPTIMIZE_MEMORY
46 # define STREAM_CACHE_TRACK 1
47 /* Max size of our cache 128Ko per track */
48 # define STREAM_CACHE_SIZE (STREAM_CACHE_TRACK*1024*128)
50 # define STREAM_CACHE_TRACK 3
51 /* Max size of our cache 4Mo per track */
52 # define STREAM_CACHE_SIZE (4*STREAM_CACHE_TRACK*1024*1024)
55 /* How many data we try to prebuffer */
56 #define STREAM_CACHE_PREBUFFER_SIZE (32767)
57 /* Maximum time we take to pre-buffer */
58 #define STREAM_CACHE_PREBUFFER_LENGTH (100*1000)
60 /* Method1: Simple, for pf_block.
61 * We get blocks and put them in the linked list.
62 * We release blocks once the total size is bigger than CACHE_BLOCK_SIZE
64 #define STREAM_DATA_WAIT 40000 /* Time between before a pf_block retry */
66 /* Method2: A bit more complex, for pf_read
67 * - We use ring buffers, only one if unseekable, all if seekable
68 * - Upon seek date current ring, then search if one ring match the pos,
69 * yes: switch to it, seek the access to match the end of the ring
70 * no: search the ring with i_end the closer to i_pos,
71 * if close enough, read data and use this ring
72 * else use the oldest ring, seek and use it.
74 * TODO: - with access non seekable: use all space available for only one ring, but
75 * we have to support seekable/non-seekable switch on the fly.
76 * - compute a good value for i_read_size
79 #define STREAM_READ_ATONCE 32767
80 #define STREAM_CACHE_TRACK_SIZE (STREAM_CACHE_SIZE/STREAM_CACHE_TRACK)
104 vlc_bool_t b_block; /* Block method (1) or stream */
106 int64_t i_pos; /* Current reading offset */
108 /* Method 1: pf_block */
111 int64_t i_start; /* Offset of block for p_first */
112 int i_offset; /* Offset for data in p_current */
113 block_t *p_current; /* Current block */
115 int i_size; /* Total amount of data in the list */
121 /* Method 2: for pf_read */
124 int i_offset; /* Buffer offset in the current track */
125 int i_tk; /* Current track */
126 stream_track_t tk[STREAM_CACHE_TRACK];
132 int i_used; /* Used since last read */
137 /* Peek temporary buffer */
141 /* Stat for both method */
144 vlc_bool_t b_fastseek; /* From access */
146 /* Stat about reading data */
147 int64_t i_read_count;
151 /* Stat about seek */
159 access_entry_t **list;
161 access_t *p_list_access;
163 /* Preparse mode ? */
168 static int AStreamReadBlock( stream_t *s, void *p_read, int i_read );
169 static int AStreamPeekBlock( stream_t *s, uint8_t **p_peek, int i_read );
170 static int AStreamSeekBlock( stream_t *s, int64_t i_pos );
171 static void AStreamPrebufferBlock( stream_t *s );
172 static block_t *AReadBlock( stream_t *s, vlc_bool_t *pb_eof );
175 static int AStreamReadStream( stream_t *s, void *p_read, int i_read );
176 static int AStreamPeekStream( stream_t *s, uint8_t **pp_peek, int i_read );
177 static int AStreamSeekStream( stream_t *s, int64_t i_pos );
178 static void AStreamPrebufferStream( stream_t *s );
179 static int AReadStream( stream_t *s, void *p_read, int i_read );
182 static int AStreamControl( stream_t *s, int i_query, va_list );
183 static void AStreamDestroy( stream_t *s );
184 static void UStreamDestroy( stream_t *s );
185 static int ASeek( stream_t *s, int64_t i_pos );
188 /****************************************************************************
189 * stream_UrlNew: create a stream from a access
190 ****************************************************************************/
191 stream_t *__stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
193 char *psz_access, *psz_demux, *psz_path, *psz_dup;
197 if( !psz_url ) return 0;
199 psz_dup = strdup( psz_url );
200 MRLSplit( p_parent, psz_dup, &psz_access, &psz_demux, &psz_path );
202 /* Now try a real access */
203 p_access = access2_New( p_parent, psz_access, psz_demux, psz_path, 0 );
206 if( p_access == NULL )
208 msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
212 if( !( p_res = stream_AccessNew( p_access, VLC_TRUE ) ) )
214 access2_Delete( p_access );
218 p_res->pf_destroy = UStreamDestroy;
222 stream_t *stream_AccessNew( access_t *p_access, vlc_bool_t b_quick )
224 stream_t *s = vlc_object_create( p_access, VLC_OBJECT_STREAM );
228 if( !s ) return NULL;
230 /* Attach it now, needed for b_die */
231 vlc_object_attach( s, p_access );
234 s->pf_read = NULL; /* Set up later */
236 s->pf_control= AStreamControl;
237 s->pf_destroy = AStreamDestroy;
239 s->p_sys = p_sys = malloc( sizeof( stream_sys_t ) );
242 p_sys->p_access = p_access;
243 p_sys->b_block = p_access->pf_block ? VLC_TRUE : VLC_FALSE;
244 p_sys->i_pos = p_access->info.i_pos;
247 access2_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
248 p_sys->stat.i_bytes = 0;
249 p_sys->stat.i_read_time = 0;
250 p_sys->stat.i_read_count = 0;
251 p_sys->stat.i_seek_count = 0;
252 p_sys->stat.i_seek_time = 0;
256 p_sys->i_list_index = 0;
257 p_sys->p_list_access = 0;
259 p_sys->b_quick = b_quick;
261 /* Get the additional list of inputs if any (for concatenation) */
262 if( (psz_list = var_CreateGetString( s, "input-list" )) && *psz_list )
264 access_entry_t *p_entry = malloc( sizeof(access_entry_t) );
265 char *psz_name, *psz_parser = psz_name = psz_list;
267 p_sys->p_list_access = p_access;
268 p_entry->i_size = p_access->info.i_size;
269 p_entry->psz_path = strdup( p_access->psz_path );
270 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
271 msg_Dbg( p_access, "adding file `%s', ("I64Fd" bytes)",
272 p_entry->psz_path, p_access->info.i_size );
274 while( psz_name && *psz_name )
276 psz_parser = strchr( psz_name, ',' );
277 if( psz_parser ) *psz_parser = 0;
279 psz_name = strdup( psz_name );
282 access_t *p_tmp = access2_New( p_access, p_access->psz_access,
287 psz_name = psz_parser;
288 if( psz_name ) psz_name++;
292 msg_Dbg( p_access, "adding file `%s', ("I64Fd" bytes)",
293 psz_name, p_tmp->info.i_size );
295 p_entry = malloc( sizeof(access_entry_t) );
296 p_entry->i_size = p_tmp->info.i_size;
297 p_entry->psz_path = psz_name;
298 TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
300 access2_Delete( p_tmp );
303 psz_name = psz_parser;
304 if( psz_name ) psz_name++;
307 if( psz_list ) free( psz_list );
311 p_sys->p_peek = NULL;
315 s->pf_read = AStreamReadBlock;
316 s->pf_peek = AStreamPeekBlock;
318 /* Init all fields of p_sys->block */
319 p_sys->block.i_start = p_sys->i_pos;
320 p_sys->block.i_offset = 0;
321 p_sys->block.p_current = NULL;
322 p_sys->block.i_size = 0;
323 p_sys->block.p_first = NULL;
324 p_sys->block.pp_last = &p_sys->block.p_first;
326 /* Do the prebuffering */
327 AStreamPrebufferBlock( s );
329 if( p_sys->block.i_size <= 0 )
331 msg_Err( s, "cannot pre fill buffer" );
339 s->pf_read = AStreamReadStream;
340 s->pf_peek = AStreamPeekStream;
342 /* Allocate/Setup our tracks */
343 p_sys->stream.i_offset = 0;
344 p_sys->stream.i_tk = 0;
345 p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
346 p_sys->stream.i_used = 0;
347 access2_Control( p_access, ACCESS_GET_MTU,
348 &p_sys->stream.i_read_size );
349 if( p_sys->stream.i_read_size <= 0 )
350 p_sys->stream.i_read_size = STREAM_READ_ATONCE;
351 else if( p_sys->stream.i_read_size <= 256 )
352 p_sys->stream.i_read_size = 256;
354 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
356 p_sys->stream.tk[i].i_date = 0;
357 p_sys->stream.tk[i].i_start = p_sys->i_pos;
358 p_sys->stream.tk[i].i_end = p_sys->i_pos;
359 p_sys->stream.tk[i].p_buffer=
360 &p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
363 /* Do the prebuffering */
364 AStreamPrebufferStream( s );
366 if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
368 msg_Err( s, "cannot pre fill buffer" );
382 free( p_sys->stream.p_buffer );
385 vlc_object_detach( s );
386 vlc_object_destroy( s );
390 /****************************************************************************
392 ****************************************************************************/
393 static void AStreamDestroy( stream_t *s )
395 stream_sys_t *p_sys = s->p_sys;
397 vlc_object_detach( s );
399 if( p_sys->b_block ) block_ChainRelease( p_sys->block.p_first );
400 else free( p_sys->stream.p_buffer );
402 if( p_sys->p_peek ) free( p_sys->p_peek );
404 if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
405 access2_Delete( p_sys->p_list_access );
407 while( p_sys->i_list-- )
409 free( p_sys->list[p_sys->i_list]->psz_path );
410 free( p_sys->list[p_sys->i_list] );
411 if( !p_sys->i_list ) free( p_sys->list );
415 vlc_object_destroy( s );
418 static void UStreamDestroy( stream_t *s )
420 access_t *p_access = (access_t*)vlc_object_find( s, VLC_OBJECT_ACCESS, FIND_PARENT );
422 vlc_object_release( p_access );
423 access2_Delete( p_access );
426 /****************************************************************************
427 * stream_AccessReset:
428 ****************************************************************************/
429 void stream_AccessReset( stream_t *s )
431 stream_sys_t *p_sys = s->p_sys;
433 p_sys->i_pos = p_sys->p_access->info.i_pos;
437 block_ChainRelease( p_sys->block.p_first );
439 /* Init all fields of p_sys->block */
440 p_sys->block.i_start = p_sys->i_pos;
441 p_sys->block.i_offset = 0;
442 p_sys->block.p_current = NULL;
443 p_sys->block.i_size = 0;
444 p_sys->block.p_first = NULL;
445 p_sys->block.pp_last = &p_sys->block.p_first;
447 /* Do the prebuffering */
448 AStreamPrebufferBlock( s );
454 /* Setup our tracks */
455 p_sys->stream.i_offset = 0;
456 p_sys->stream.i_tk = 0;
457 p_sys->stream.i_used = 0;
459 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
461 p_sys->stream.tk[i].i_date = 0;
462 p_sys->stream.tk[i].i_start = p_sys->i_pos;
463 p_sys->stream.tk[i].i_end = p_sys->i_pos;
466 /* Do the prebuffering */
467 AStreamPrebufferStream( s );
471 /****************************************************************************
472 * stream_AccessUpdate:
473 ****************************************************************************/
474 void stream_AccessUpdate( stream_t *s )
476 stream_sys_t *p_sys = s->p_sys;
478 p_sys->i_pos = p_sys->p_access->info.i_pos;
483 for( i = 0; i < p_sys->i_list_index; i++ )
485 p_sys->i_pos += p_sys->list[i]->i_size;
490 /****************************************************************************
492 ****************************************************************************/
493 static int AStreamControl( stream_t *s, int i_query, va_list args )
495 stream_sys_t *p_sys = s->p_sys;
496 access_t *p_access = p_sys->p_access;
499 int64_t *pi_64, i_64;
504 case STREAM_GET_SIZE:
505 pi_64 = (int64_t*)va_arg( args, int64_t * );
506 if( s->p_sys->i_list )
510 for( i = 0; i < s->p_sys->i_list; i++ )
511 *pi_64 += s->p_sys->list[i]->i_size;
514 *pi_64 = p_access->info.i_size;
517 case STREAM_CAN_SEEK:
518 p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
519 access2_Control( p_access, ACCESS_CAN_SEEK, p_bool );
522 case STREAM_CAN_FASTSEEK:
523 p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
524 access2_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
527 case STREAM_GET_POSITION:
528 pi_64 = (int64_t*)va_arg( args, int64_t * );
529 *pi_64 = p_sys->i_pos;
532 case STREAM_SET_POSITION:
533 i_64 = (int64_t)va_arg( args, int64_t );
535 return AStreamSeekBlock( s, i_64 );
537 return AStreamSeekStream( s, i_64 );
542 case STREAM_CONTROL_ACCESS:
543 i_int = (int) va_arg( args, int );
544 if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
545 i_int != ACCESS_SET_PRIVATE_ID_CA &&
546 i_int != ACCESS_GET_PRIVATE_ID_STATE )
548 msg_Err( s, "Hey, what are you thinking ?"
549 "DON'T USE STREAM_CONTROL_ACCESS !!!" );
552 return access2_vaControl( p_access, i_int, args );
555 msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
563 /****************************************************************************
565 ****************************************************************************/
566 static void AStreamPrebufferBlock( stream_t *s )
568 stream_sys_t *p_sys = s->p_sys;
573 msg_Dbg( s, "pre buffering" );
577 int64_t i_date = mdate();
581 if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE ||
582 ( i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date ) )
587 p_sys->stat.i_bytes = p_sys->block.i_size;
588 p_sys->stat.i_read_time = i_date - i_start;
589 i_byterate = ( I64C(1000000) * p_sys->stat.i_bytes ) /
590 (p_sys->stat.i_read_time + 1);
592 msg_Dbg( s, "prebuffering done "I64Fd" bytes in "I64Fd"s - "
595 p_sys->stat.i_read_time / I64C(1000000),
601 if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
605 msleep( STREAM_DATA_WAIT );
612 msg_Dbg( s, "received first data for our buffer");
615 /* Append the block */
616 p_sys->block.i_size += b->i_buffer;
617 *p_sys->block.pp_last = b;
618 p_sys->block.pp_last = &b->p_next;
620 p_sys->stat.i_read_count++;
623 p_sys->block.p_current = p_sys->block.p_first;
626 static int AStreamRefillBlock( stream_t *s );
628 static int AStreamReadBlock( stream_t *s, void *p_read, int i_read )
630 stream_sys_t *p_sys = s->p_sys;
632 uint8_t *p_data= (uint8_t*)p_read;
636 if( p_sys->block.p_current == NULL )
641 /* seek within this stream if possible, else use plain old read and discard */
642 stream_sys_t *p_sys = s->p_sys;
643 access_t *p_access = p_sys->p_access;
645 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
647 return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
650 while( i_data < i_read )
653 p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
654 int i_copy = __MIN( i_current, i_read - i_data);
660 &p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
666 p_sys->block.i_offset += i_copy;
667 if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
669 /* Current block is now empty, switch to next */
670 if( p_sys->block.p_current )
672 p_sys->block.i_offset = 0;
673 p_sys->block.p_current = p_sys->block.p_current->p_next;
676 if( AStreamRefillBlock( s ) )
683 p_sys->i_pos += i_data;
687 static int AStreamPeekBlock( stream_t *s, uint8_t **pp_peek, int i_read )
689 stream_sys_t *p_sys = s->p_sys;
695 if( p_sys->block.p_current == NULL ) return 0; /* EOF */
697 /* We can directly give a pointer over our buffer */
698 if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
700 *pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
704 /* We need to create a local copy */
705 if( p_sys->i_peek < i_read )
707 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
713 p_sys->i_peek = i_read;
716 /* Fill enough data */
717 while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
720 block_t **pp_last = p_sys->block.pp_last;
722 if( AStreamRefillBlock( s ) ) break;
724 /* Our buffer are probably filled enough, don't try anymore */
725 if( pp_last == p_sys->block.pp_last ) break;
728 /* Copy what we have */
729 b = p_sys->block.p_current;
730 i_offset = p_sys->block.i_offset;
731 p_data = p_sys->p_peek;
733 while( b && i_data < i_read )
735 int i_current = b->i_buffer - i_offset;
736 int i_copy = __MIN( i_current, i_read - i_data );
738 memcpy( p_data, &b->p_buffer[i_offset], i_copy );
743 if( i_offset >= b->i_buffer )
750 *pp_peek = p_sys->p_peek;
754 static int AStreamSeekBlock( stream_t *s, int64_t i_pos )
756 stream_sys_t *p_sys = s->p_sys;
757 access_t *p_access = p_sys->p_access;
758 int64_t i_offset = i_pos - p_sys->block.i_start;
761 /* We already have thoses data, just update p_current/i_offset */
762 if( i_offset >= 0 && i_offset < p_sys->block.i_size )
764 block_t *b = p_sys->block.p_first;
767 while( i_current + b->i_buffer < i_offset )
769 i_current += b->i_buffer;
773 p_sys->block.p_current = b;
774 p_sys->block.i_offset = i_offset - i_current;
776 p_sys->i_pos = i_pos;
781 /* We may need to seek or to read data */
785 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
789 msg_Err( s, "backward seek impossible (access non seekable)" );
797 vlc_bool_t b_aseek, b_aseekfast;
799 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
800 access2_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
805 msg_Warn( s, I64Fd" bytes need to be skipped "
806 "(access non seekable)",
807 i_offset - p_sys->block.i_size );
811 int64_t i_skip = i_offset - p_sys->block.i_size;
813 /* Avg bytes per packets */
814 int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
815 /* TODO compute a seek cost instead of fixed threshold */
816 int i_th = b_aseekfast ? 1 : 5;
818 if( i_skip <= i_th * i_avg &&
819 i_skip < STREAM_CACHE_SIZE )
824 msg_Dbg( s, "b_seek=%d th*avg=%d skip="I64Fd,
825 b_seek, i_th*i_avg, i_skip );
831 int64_t i_start, i_end;
832 /* Do the access seek */
834 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
838 block_ChainRelease( p_sys->block.p_first );
841 p_sys->block.i_start = p_sys->i_pos = i_pos;
842 p_sys->block.i_offset = 0;
843 p_sys->block.p_current = NULL;
844 p_sys->block.i_size = 0;
845 p_sys->block.p_first = NULL;
846 p_sys->block.pp_last = &p_sys->block.p_first;
849 if( AStreamRefillBlock( s ) )
851 msg_Err( s, "cannot re fill buffer" );
855 p_sys->stat.i_seek_time += i_end - i_start;
856 p_sys->stat.i_seek_count++;
861 /* Read enought data */
862 while( p_sys->block.i_start + p_sys->block.i_size < i_pos )
864 if( AStreamRefillBlock( s ) )
866 msg_Err( s, "can't read enough data in seek" );
869 while( p_sys->block.p_current &&
870 p_sys->i_pos + p_sys->block.p_current->i_buffer < i_pos )
872 p_sys->i_pos += p_sys->block.p_current->i_buffer;
873 p_sys->block.p_current = p_sys->block.p_current->p_next;
877 p_sys->block.i_offset = i_pos - p_sys->i_pos;
878 p_sys->i_pos = i_pos;
887 static int AStreamRefillBlock( stream_t *s )
889 stream_sys_t *p_sys = s->p_sys;
890 int64_t i_start, i_stop;
894 while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
895 p_sys->block.p_first != p_sys->block.p_current )
897 block_t *b = p_sys->block.p_first;
899 p_sys->block.i_start += b->i_buffer;
900 p_sys->block.i_size -= b->i_buffer;
901 p_sys->block.p_first = b->p_next;
905 if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
906 p_sys->block.p_current == p_sys->block.p_first &&
907 p_sys->block.p_current->p_next ) /* At least 2 packets */
909 /* Enough data, don't read more */
913 /* Now read a new block */
919 if( s->b_die ) return VLC_EGENERIC;
923 if( ( b = AReadBlock( s, &b_eof ) ) ) break;
925 if( b_eof ) return VLC_EGENERIC;
927 msleep( STREAM_DATA_WAIT );
931 /* Append the block */
932 p_sys->block.i_size += b->i_buffer;
933 *p_sys->block.pp_last = b;
934 p_sys->block.pp_last = &b->p_next;
937 if( p_sys->block.p_current == NULL )
938 p_sys->block.p_current = b;
941 p_sys->stat.i_bytes += b->i_buffer;
942 p_sys->stat.i_read_time += i_stop - i_start;
943 p_sys->stat.i_read_count++;
949 /****************************************************************************
951 ****************************************************************************/
952 static int AStreamRefillStream( stream_t *s );
954 static int AStreamReadStream( stream_t *s, void *p_read, int i_read )
956 stream_sys_t *p_sys = s->p_sys;
957 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
959 uint8_t *p_data = (uint8_t *)p_read;
962 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
966 /* seek within this stream if possible, else use plain old read and discard */
967 stream_sys_t *p_sys = s->p_sys;
968 access_t *p_access = p_sys->p_access;
970 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
972 return AStreamSeekStream( s, p_sys->i_pos + i_read ) ? 0 : i_read;
976 msg_Dbg( s, "AStreamReadStream: %d pos="I64Fd" tk=%d start="I64Fd
977 " offset=%d end="I64Fd,
978 i_read, p_sys->i_pos, p_sys->stream.i_tk,
979 tk->i_start, p_sys->stream.i_offset, tk->i_end );
982 while( i_data < i_read )
984 int i_off = (tk->i_start + p_sys->stream.i_offset) %
985 STREAM_CACHE_TRACK_SIZE;
987 __MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
988 STREAM_CACHE_TRACK_SIZE - i_off );
989 int i_copy = __MIN( i_current, i_read - i_data );
991 if( i_copy <= 0 ) break; /* EOF */
994 /* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
997 memcpy( p_data, &tk->p_buffer[i_off], i_copy );
1001 p_sys->stream.i_offset += i_copy;
1003 /* Update pos now */
1004 p_sys->i_pos += i_copy;
1007 p_sys->stream.i_used += i_copy;
1008 if( tk->i_start + p_sys->stream.i_offset >= tk->i_end ||
1009 p_sys->stream.i_used >= p_sys->stream.i_read_size )
1011 if( AStreamRefillStream( s ) )
1014 if( tk->i_start >= tk->i_end ) break;
1022 static int AStreamPeekStream( stream_t *s, uint8_t **pp_peek, int i_read )
1024 stream_sys_t *p_sys = s->p_sys;
1025 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1028 if( tk->i_start >= tk->i_end ) return 0; /* EOF */
1031 msg_Dbg( s, "AStreamPeekStream: %d pos="I64Fd" tk=%d "
1032 "start="I64Fd" offset=%d end="I64Fd,
1033 i_read, p_sys->i_pos, p_sys->stream.i_tk,
1034 tk->i_start, p_sys->stream.i_offset, tk->i_end );
1037 /* Avoid problem, but that should *never* happen */
1038 if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
1039 i_read = STREAM_CACHE_TRACK_SIZE / 2;
1041 while( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1043 if( p_sys->stream.i_used <= 1 )
1045 /* Be sure we will read something */
1046 p_sys->stream.i_used += i_read -
1047 (tk->i_end - tk->i_start - p_sys->stream.i_offset);
1049 if( AStreamRefillStream( s ) ) break;
1052 if( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
1053 i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
1055 /* Now, direct pointer or a copy ? */
1056 i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
1057 if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
1059 *pp_peek = &tk->p_buffer[i_off];
1063 if( p_sys->i_peek < i_read )
1065 p_sys->p_peek = realloc( p_sys->p_peek, i_read );
1066 if( !p_sys->p_peek )
1071 p_sys->i_peek = i_read;
1074 memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
1075 STREAM_CACHE_TRACK_SIZE - i_off );
1076 memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
1077 &tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
1079 *pp_peek = p_sys->p_peek;
1083 static int AStreamSeekStream( stream_t *s, int64_t i_pos )
1085 stream_sys_t *p_sys = s->p_sys;
1086 access_t *p_access = p_sys->p_access;
1088 vlc_bool_t b_afastseek;
1094 msg_Dbg( s, "AStreamSeekStream: to "I64Fd" pos="I64Fd
1095 "tk=%d start="I64Fd" offset=%d end="I64Fd,
1096 i_pos, p_sys->i_pos, p_sys->stream.i_tk,
1097 p_sys->stream.tk[p_sys->stream.i_tk].i_start,
1098 p_sys->stream.i_offset,
1099 p_sys->stream.tk[p_sys->stream.i_tk].i_end );
1103 /* Seek in our current track ? */
1104 if( i_pos >= p_sys->stream.tk[p_sys->stream.i_tk].i_start &&
1105 i_pos < p_sys->stream.tk[p_sys->stream.i_tk].i_end )
1107 //msg_Dbg( s, "AStreamSeekStream: current track" );
1108 p_sys->i_pos = i_pos;
1109 p_sys->stream.i_offset = i_pos - p_sys->stream.tk[p_sys->stream.i_tk].i_start;
1113 access2_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
1116 /* We can't do nothing */
1117 msg_Dbg( s, "AStreamSeekStream: can't seek" );
1118 return VLC_EGENERIC;
1121 /* Date the current track */
1122 p_sys->stream.tk[p_sys->stream.i_tk].i_date = mdate();
1124 /* Try to reuse already read data */
1125 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1127 stream_track_t *tk = &p_sys->stream.tk[i];
1129 if( i_pos >= tk->i_start && i_pos <= tk->i_end )
1132 msg_Dbg( s, "AStreamSeekStream: reusing %d start="I64Fd
1133 " end="I64Fd, i, tk->i_start, tk->i_end );
1135 /* Seek at the end of the buffer */
1136 if( ASeek( s, tk->i_end ) ) return VLC_EGENERIC;
1139 p_sys->i_pos = i_pos;
1140 p_sys->stream.i_tk = i;
1141 p_sys->stream.i_offset = i_pos - tk->i_start;
1143 if( p_sys->stream.i_used < 1024 )
1144 p_sys->stream.i_used = 1024;
1146 if( AStreamRefillStream( s ) && i_pos == tk->i_end )
1147 return VLC_EGENERIC;
1153 access2_Control( p_access, ACCESS_CAN_SEEK, &b_afastseek );
1154 /* FIXME compute seek cost (instead of static 'stupid' value) */
1155 i_maxth = __MIN( p_sys->stream.i_read_size, STREAM_READ_ATONCE / 2 );
1161 /* Search closest segment TODO */
1162 for( i = 0; i < STREAM_CACHE_TRACK; i++ )
1164 stream_track_t *tk = &p_sys->stream.tk[i];
1166 if( i_pos + i_maxth >= tk->i_start )
1168 msg_Dbg( s, "good segment before current pos, TODO" );
1170 if( i_pos - i_maxth <= tk->i_end )
1172 msg_Dbg( s, "good segment after current pos, TODO" );
1177 /* Nothing good, seek and choose oldest segment */
1178 if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
1179 p_sys->i_pos = i_pos;
1182 for( i = 1; i < STREAM_CACHE_TRACK; i++ )
1184 if( p_sys->stream.tk[i].i_date < p_sys->stream.tk[i_new].i_date )
1188 /* Reset the segment */
1189 p_sys->stream.i_tk = i_new;
1190 p_sys->stream.i_offset = 0;
1191 p_sys->stream.tk[i_new].i_start = i_pos;
1192 p_sys->stream.tk[i_new].i_end = i_pos;
1195 if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
1196 p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
1198 if( AStreamRefillStream( s ) )
1199 return VLC_EGENERIC;
1204 static int AStreamRefillStream( stream_t *s )
1206 stream_sys_t *p_sys = s->p_sys;
1207 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1209 /* We read but won't increase i_start after initial start + offset */
1211 __MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
1212 (tk->i_end - tk->i_start - p_sys->stream.i_offset) );
1213 vlc_bool_t b_read = VLC_FALSE;
1214 int64_t i_start, i_stop;
1216 if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
1218 /* msg_Dbg( s, "AStreamRefillStream: toread=%d", i_toread ); */
1221 while( i_toread > 0 )
1223 int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
1227 return VLC_EGENERIC;
1229 i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
1230 i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
1232 /* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
1235 msleep( STREAM_DATA_WAIT );
1238 else if( i_read == 0 )
1240 if( !b_read ) return VLC_EGENERIC;
1246 tk->i_end += i_read;
1248 /* Windows of STREAM_CACHE_TRACK_SIZE */
1249 if( tk->i_end - tk->i_start > STREAM_CACHE_TRACK_SIZE )
1251 int i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
1253 tk->i_start += i_invalid;
1254 p_sys->stream.i_offset -= i_invalid;
1258 p_sys->stream.i_used -= i_read;
1260 p_sys->stat.i_bytes += i_read;
1261 p_sys->stat.i_read_count++;
1265 p_sys->stat.i_read_time += i_stop - i_start;
1270 static void AStreamPrebufferStream( stream_t *s )
1272 stream_sys_t *p_sys = s->p_sys;
1273 access_t *p_access = p_sys->p_access;
1275 int64_t i_first = 0;
1277 int64_t i_prebuffer = p_sys->b_quick ? STREAM_CACHE_TRACK_SIZE /100 :
1278 ( (p_access->info.i_title > 1 || p_access->info.i_seekpoint > 1) ?
1279 STREAM_CACHE_PREBUFFER_SIZE : STREAM_CACHE_TRACK_SIZE / 3 );
1281 msg_Dbg( s, "pre buffering" );
1285 stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
1287 int64_t i_date = mdate();
1290 if( s->b_die || tk->i_end >= i_prebuffer ||
1291 (i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date) )
1296 p_sys->stat.i_bytes = tk->i_end - tk->i_start;
1297 p_sys->stat.i_read_time = i_date - i_start;
1298 i_byterate = ( I64C(1000000) * p_sys->stat.i_bytes ) /
1299 (p_sys->stat.i_read_time+1);
1301 msg_Dbg( s, "prebuffering done "I64Fd" bytes in "I64Fd"s - "
1303 p_sys->stat.i_bytes,
1304 p_sys->stat.i_read_time / I64C(1000000),
1305 i_byterate / 1024 );
1310 i_read = STREAM_CACHE_TRACK_SIZE - tk->i_end;
1311 i_read = __MIN( p_sys->stream.i_read_size, i_read );
1312 i_read = AReadStream( s, &tk->p_buffer[tk->i_end], i_read );
1315 msleep( STREAM_DATA_WAIT );
1318 else if( i_read == 0 )
1327 msg_Dbg( s, "received first data for our buffer");
1330 tk->i_end += i_read;
1332 p_sys->stat.i_read_count++;
1337 /****************************************************************************
1339 ****************************************************************************/
1341 * Read from the stream untill first newline.
1342 * \param s Stream handle to read from
1343 * \return A null-terminated string. This must be freed,
1345 #define STREAM_PROBE_LINE 2048
1346 #define STREAM_LINE_MAX (2048*100)
1347 char *stream_ReadLine( stream_t *s )
1349 char *p_line = NULL;
1350 int i_line = 0, i_read = 0;
1352 while( i_read < STREAM_LINE_MAX )
1358 /* Probe new data */
1359 i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
1360 if( i_data <= 0 ) break; /* No more data */
1362 /* Check if there is an EOL */
1363 if( ( psz_eol = memchr( p_data, '\n', i_data ) ) )
1365 i_data = (psz_eol - (char *)p_data) + 1;
1366 p_line = realloc( p_line, i_line + i_data + 1 );
1367 i_data = stream_Read( s, &p_line[i_line], i_data );
1368 if( i_data <= 0 ) break; /* Hmmm */
1369 i_line += (i_data - 1);
1372 /* We have our line */
1376 /* Read data (+1 for easy \0 append) */
1377 p_line = realloc( p_line, i_line + STREAM_PROBE_LINE + 1 );
1378 i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
1379 if( i_data <= 0 ) break; /* Hmmm */
1384 /* Remove trailing LF/CR */
1385 while( i_line > 0 && ( p_line[i_line-1] == '\r' ||
1386 p_line[i_line-1] == '\n') ) i_line--;
1390 p_line[i_line] = '\0';
1394 /* We failed to read any data, probably EOF */
1395 if( p_line ) free( p_line );
1399 /****************************************************************************
1400 * Access reading/seeking wrappers to handle concatenated streams.
1401 ****************************************************************************/
1402 static int AReadStream( stream_t *s, void *p_read, int i_read )
1404 stream_sys_t *p_sys = s->p_sys;
1405 access_t *p_access = p_sys->p_access;
1406 int i_read_orig = i_read;
1408 if( !p_sys->i_list )
1410 i_read = p_access->pf_read( p_access, p_read, i_read );
1414 i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
1417 /* If we reached an EOF then switch to the next stream in the list */
1418 if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
1420 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1421 access_t *p_list_access;
1423 msg_Dbg( s, "opening input `%s'", psz_name );
1425 p_list_access = access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1427 if( !p_list_access ) return 0;
1429 if( p_sys->p_list_access != p_access )
1430 access2_Delete( p_sys->p_list_access );
1432 p_sys->p_list_access = p_list_access;
1434 /* We have to read some data */
1435 return AReadStream( s, p_read, i_read_orig );
1441 static block_t *AReadBlock( stream_t *s, vlc_bool_t *pb_eof )
1443 stream_sys_t *p_sys = s->p_sys;
1444 access_t *p_access = p_sys->p_access;
1448 if( !p_sys->i_list )
1450 p_block = p_access->pf_block( p_access );
1451 if( pb_eof ) *pb_eof = p_access->info.b_eof;
1455 p_block = p_sys->p_list_access->pf_block( p_access );
1456 b_eof = p_sys->p_list_access->info.b_eof;
1457 if( pb_eof ) *pb_eof = b_eof;
1459 /* If we reached an EOF then switch to the next stream in the list */
1460 if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
1462 char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
1463 access_t *p_list_access;
1465 msg_Dbg( s, "opening input `%s'", psz_name );
1467 p_list_access = access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1469 if( !p_list_access ) return 0;
1471 if( p_sys->p_list_access != p_access )
1472 access2_Delete( p_sys->p_list_access );
1474 p_sys->p_list_access = p_list_access;
1476 /* We have to read some data */
1477 return AReadBlock( s, pb_eof );
1483 static int ASeek( stream_t *s, int64_t i_pos )
1485 stream_sys_t *p_sys = s->p_sys;
1486 access_t *p_access = p_sys->p_access;
1488 /* Check which stream we need to access */
1494 access_t *p_list_access = 0;
1496 for( i = 0; i < p_sys->i_list - 1; i++ )
1498 if( i_pos < p_sys->list[i]->i_size + i_size ) break;
1499 i_size += p_sys->list[i]->i_size;
1501 psz_name = p_sys->list[i]->psz_path;
1503 if( i != p_sys->i_list_index )
1504 msg_Dbg( s, "opening input `%s'", psz_name );
1506 if( i != p_sys->i_list_index && i != 0 )
1509 access2_New( s, p_access->psz_access, 0, psz_name, 0 );
1511 else if( i != p_sys->i_list_index )
1513 p_list_access = p_access;
1518 if( p_sys->p_list_access != p_access )
1519 access2_Delete( p_sys->p_list_access );
1521 p_sys->p_list_access = p_list_access;
1524 p_sys->i_list_index = i;
1525 return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
1529 return p_access->pf_seek( p_access, i_pos );