/*****************************************************************************
* stream.c
*****************************************************************************
* Copyright (C) 1999-2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "vlc_common.h"
#include <assert.h>
#include "input_internal.h"
#undef STREAM_DEBUG
/* TODO:
* - tune the 2 methods (block/stream)
* - compute cost for seek
* - improve stream mode seeking with closest segments
* - ...
* - Maybe remove (block/stream) in favour of immediate
*/
/* Two methods:
* - using pf_block
* One linked list of data read
* - using pf_read
* More complex scheme using mutliple track to avoid seeking
* - using directly the access (only indirection for peeking).
* This method is known to introduce much less latency.
* It should probably defaulted (instead of the stream method (2)).
*/
/* How many tracks we have, currently only used for stream mode */
#ifdef OPTIMIZE_MEMORY
# define STREAM_CACHE_TRACK 1
/* Max size of our cache 128Ko per track */
# define STREAM_CACHE_SIZE (STREAM_CACHE_TRACK*1024*128)
#else
# define STREAM_CACHE_TRACK 3
/* Max size of our cache 4Mo per track */
# define STREAM_CACHE_SIZE (4*STREAM_CACHE_TRACK*1024*1024)
#endif
/* How many data we try to prebuffer */
#define STREAM_CACHE_PREBUFFER_SIZE (32767)
/* Maximum time we take to pre-buffer */
#define STREAM_CACHE_PREBUFFER_LENGTH (100*1000)
/* Method1: Simple, for pf_block.
* We get blocks and put them in the linked list.
* We release blocks once the total size is bigger than CACHE_BLOCK_SIZE
*/
#define STREAM_DATA_WAIT 40000 /* Time between before a pf_block retry */
/* Method2: A bit more complex, for pf_read
* - We use ring buffers, only one if unseekable, all if seekable
* - Upon seek date current ring, then search if one ring match the pos,
* yes: switch to it, seek the access to match the end of the ring
* no: search the ring with i_end the closer to i_pos,
* if close enough, read data and use this ring
* else use the oldest ring, seek and use it.
*
* TODO: - with access non seekable: use all space available for only one ring, but
* we have to support seekable/non-seekable switch on the fly.
* - compute a good value for i_read_size
* - ?
*/
#define STREAM_READ_ATONCE 32767
#define STREAM_CACHE_TRACK_SIZE (STREAM_CACHE_SIZE/STREAM_CACHE_TRACK)
typedef struct
{
int64_t i_date;
int64_t i_start;
int64_t i_end;
uint8_t *p_buffer;
} stream_track_t;
typedef struct
{
char *psz_path;
int64_t i_size;
} access_entry_t;
typedef enum stream_read_method_t
{
Immediate,
Block,
Stream
} stream_read_method_t;
struct stream_sys_t
{
access_t *p_access;
stream_read_method_t method; /* method to use */
int64_t i_pos; /* Current reading offset */
/* Method 1: pf_block */
struct
{
int64_t i_start; /* Offset of block for p_first */
int64_t i_offset; /* Offset for data in p_current */
block_t *p_current; /* Current block */
int i_size; /* Total amount of data in the list */
block_t *p_first;
block_t **pp_last;
} block;
/* Method 2: for pf_read */
struct
{
int i_offset; /* Buffer offset in the current track */
int i_tk; /* Current track */
stream_track_t tk[STREAM_CACHE_TRACK];
/* Global buffer */
uint8_t *p_buffer;
/* */
int i_used; /* Used since last read */
int i_read_size;
} stream;
/* Method 3: for pf_read */
struct
{
int64_t i_end;
uint8_t *p_buffer;
} immediate;
/* Peek temporary buffer */
unsigned int i_peek;
uint8_t *p_peek;
/* Stat for both method */
struct
{
bool b_fastseek; /* From access */
/* Stat about reading data */
int64_t i_read_count;
int64_t i_bytes;
int64_t i_read_time;
/* Stat about seek */
int i_seek_count;
int64_t i_seek_time;
} stat;
/* Streams list */
int i_list;
access_entry_t **list;
int i_list_index;
access_t *p_list_access;
/* Preparse mode ? */
bool b_quick;
};
/* Method 1: */
static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read );
static int AStreamPeekBlock( stream_t *s, const uint8_t **p_peek, unsigned int i_read );
static int AStreamSeekBlock( stream_t *s, int64_t i_pos );
static void AStreamPrebufferBlock( stream_t *s );
static block_t *AReadBlock( stream_t *s, bool *pb_eof );
/* Method 2 */
static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read );
static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read );
static int AStreamSeekStream( stream_t *s, int64_t i_pos );
static void AStreamPrebufferStream( stream_t *s );
static int AReadStream( stream_t *s, void *p_read, unsigned int i_read );
/* Method 3 */
static int AStreamReadImmediate( stream_t *s, void *p_read, unsigned int i_read );
static int AStreamPeekImmediate( stream_t *s, const uint8_t **pp_peek, unsigned int i_read );
static int AStreamSeekImmediate( stream_t *s, int64_t i_pos );
/* Common */
static int AStreamControl( stream_t *s, int i_query, va_list );
static void AStreamDestroy( stream_t *s );
static void UStreamDestroy( stream_t *s );
static int ASeek( stream_t *s, int64_t i_pos );
/****************************************************************************
* Method 3 helpers:
****************************************************************************/
static inline int64_t stream_buffered_size( stream_t *s )
{
return s->p_sys->immediate.i_end;
}
static inline void stream_buffer_empty( stream_t *s, int length )
{
length = __MAX( stream_buffered_size( s ), length );
if( length )
{
memmove( s->p_sys->immediate.p_buffer,
s->p_sys->immediate.p_buffer + length,
stream_buffered_size( s ) - length );
}
s->p_sys->immediate.i_end -= length;
}
static inline void stream_buffer_fill( stream_t *s, int length )
{
s->p_sys->immediate.i_end += length;
}
static inline uint8_t * stream_buffer( stream_t *s )
{
return s->p_sys->immediate.p_buffer;
}
/****************************************************************************
* stream_UrlNew: create a stream from a access
****************************************************************************/
stream_t *__stream_UrlNew( vlc_object_t *p_parent, const char *psz_url )
{
const char *psz_access, *psz_demux;
char *psz_path;
access_t *p_access;
stream_t *p_res;
if( !psz_url )
return NULL;
char psz_dup[strlen( psz_url ) + 1];
strcpy( psz_dup, psz_url );
input_SplitMRL( &psz_access, &psz_demux, &psz_path, psz_dup );
/* Now try a real access */
p_access = access_New( p_parent, psz_access, psz_demux, psz_path );
if( p_access == NULL )
{
msg_Err( p_parent, "no suitable access module for `%s'", psz_url );
return NULL;
}
if( !( p_res = stream_AccessNew( p_access, true ) ) )
{
access_Delete( p_access );
return NULL;
}
p_res->pf_destroy = UStreamDestroy;
return p_res;
}
stream_t *stream_AccessNew( access_t *p_access, bool b_quick )
{
stream_t *s = vlc_stream_create( VLC_OBJECT(p_access) );
stream_sys_t *p_sys;
char *psz_list = NULL;
if( !s ) return NULL;
/* Attach it now, needed for b_die */
vlc_object_attach( s, p_access );
s->pf_read = NULL; /* Set up later */
s->pf_peek = NULL;
s->pf_control = AStreamControl;
s->pf_destroy = AStreamDestroy;
s->p_sys = p_sys = malloc( sizeof( stream_sys_t ) );
if( p_sys == NULL )
goto error;
/* UTF16 and UTF32 text file conversion */
s->i_char_width = 1;
s->b_little_endian = false;
s->conv = (vlc_iconv_t)(-1);
/* Common field */
p_sys->p_access = p_access;
if( p_access->pf_block )
p_sys->method = Block;
else if (var_CreateGetBool( s, "use-stream-immediate"))
p_sys->method = Immediate;
else
p_sys->method = Stream;
p_sys->i_pos = p_access->info.i_pos;
/* Stats */
access_Control( p_access, ACCESS_CAN_FASTSEEK, &p_sys->stat.b_fastseek );
p_sys->stat.i_bytes = 0;
p_sys->stat.i_read_time = 0;
p_sys->stat.i_read_count = 0;
p_sys->stat.i_seek_count = 0;
p_sys->stat.i_seek_time = 0;
p_sys->i_list = 0;
p_sys->list = 0;
p_sys->i_list_index = 0;
p_sys->p_list_access = 0;
p_sys->b_quick = b_quick;
/* Get the additional list of inputs if any (for concatenation) */
if( (psz_list = var_CreateGetString( s, "input-list" )) && *psz_list )
{
access_entry_t *p_entry = malloc( sizeof(access_entry_t) );
if( p_entry == NULL )
goto error;
char *psz_name, *psz_parser = psz_name = psz_list;
p_sys->p_list_access = p_access;
p_entry->i_size = p_access->info.i_size;
p_entry->psz_path = strdup( p_access->psz_path );
if( p_entry->psz_path == NULL )
{
free( p_entry );
goto error;
}
TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
p_entry->psz_path, p_access->info.i_size );
while( psz_name && *psz_name )
{
psz_parser = strchr( psz_name, ',' );
if( psz_parser ) *psz_parser = 0;
psz_name = strdup( psz_name );
if( psz_name )
{
access_t *p_tmp = access_New( p_access, p_access->psz_access,
"", psz_name );
if( !p_tmp )
{
psz_name = psz_parser;
if( psz_name ) psz_name++;
continue;
}
msg_Dbg( p_access, "adding file `%s', (%"PRId64" bytes)",
psz_name, p_tmp->info.i_size );
p_entry = malloc( sizeof(access_entry_t) );
if( p_entry == NULL )
goto error;
p_entry->i_size = p_tmp->info.i_size;
p_entry->psz_path = psz_name;
TAB_APPEND( p_sys->i_list, p_sys->list, p_entry );
access_Delete( p_tmp );
}
psz_name = psz_parser;
if( psz_name ) psz_name++;
}
}
FREENULL( psz_list );
/* Peek */
p_sys->i_peek = 0;
p_sys->p_peek = NULL;
if( p_sys->method == Block )
{
msg_Dbg( s, "Using AStream*Block" );
s->pf_read = AStreamReadBlock;
s->pf_peek = AStreamPeekBlock;
/* Init all fields of p_sys->block */
p_sys->block.i_start = p_sys->i_pos;
p_sys->block.i_offset = 0;
p_sys->block.p_current = NULL;
p_sys->block.i_size = 0;
p_sys->block.p_first = NULL;
p_sys->block.pp_last = &p_sys->block.p_first;
/* Do the prebuffering */
AStreamPrebufferBlock( s );
if( p_sys->block.i_size <= 0 )
{
msg_Err( s, "cannot pre fill buffer" );
goto error;
}
}
else if (p_sys->method == Immediate)
{
msg_Dbg( s, "Using AStream*Immediate" );
s->pf_read = AStreamReadImmediate;
s->pf_peek = AStreamPeekImmediate;
/* Allocate/Setup our tracks (useful to peek)*/
p_sys->immediate.i_end = 0;
p_sys->immediate.p_buffer = malloc( STREAM_CACHE_SIZE );
msg_Dbg( s, "p_buffer %p-%p", p_sys->immediate.p_buffer,
p_sys->immediate.p_buffer + STREAM_CACHE_SIZE );
if( p_sys->immediate.p_buffer == NULL )
{
msg_Err( s, "Out of memory when allocating stream cache (%d bytes)",
STREAM_CACHE_SIZE );
goto error;
}
}
else /* ( p_sys->method == Stream ) */
{
int i;
msg_Dbg( s, "Using AStream*Stream" );
s->pf_read = AStreamReadStream;
s->pf_peek = AStreamPeekStream;
/* Allocate/Setup our tracks */
p_sys->stream.i_offset = 0;
p_sys->stream.i_tk = 0;
p_sys->stream.p_buffer = malloc( STREAM_CACHE_SIZE );
if( p_sys->stream.p_buffer == NULL )
{
msg_Err( s, "Out of memory when allocating stream cache (%d bytes)",
STREAM_CACHE_SIZE );
goto error;
}
p_sys->stream.i_used = 0;
access_Control( p_access, ACCESS_GET_MTU,
&p_sys->stream.i_read_size );
if( p_sys->stream.i_read_size <= 0 )
p_sys->stream.i_read_size = STREAM_READ_ATONCE;
else if( p_sys->stream.i_read_size <= 256 )
p_sys->stream.i_read_size = 256;
for( i = 0; i < STREAM_CACHE_TRACK; i++ )
{
p_sys->stream.tk[i].i_date = 0;
p_sys->stream.tk[i].i_start = p_sys->i_pos;
p_sys->stream.tk[i].i_end = p_sys->i_pos;
p_sys->stream.tk[i].p_buffer=
&p_sys->stream.p_buffer[i * STREAM_CACHE_TRACK_SIZE];
}
/* Do the prebuffering */
AStreamPrebufferStream( s );
if( p_sys->stream.tk[p_sys->stream.i_tk].i_end <= 0 )
{
msg_Err( s, "cannot pre fill buffer" );
goto error;
}
}
return s;
error:
if( p_sys->method == Block )
{
/* Nothing yet */
}
else
{
free( p_sys->stream.p_buffer );
}
while( p_sys->i_list > 0 )
free( p_sys->list[--(p_sys->i_list)] );
free( p_sys->list );
free( psz_list );
free( s->p_sys );
vlc_object_detach( s );
vlc_object_release( s );
return NULL;
}
/****************************************************************************
* AStreamDestroy:
****************************************************************************/
static void AStreamDestroy( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
vlc_object_detach( s );
if( p_sys->method == Block ) block_ChainRelease( p_sys->block.p_first );
else if ( p_sys->method == Immediate ) free( p_sys->immediate.p_buffer );
else free( p_sys->stream.p_buffer );
free( p_sys->p_peek );
if( p_sys->p_list_access && p_sys->p_list_access != p_sys->p_access )
access_Delete( p_sys->p_list_access );
while( p_sys->i_list-- )
{
free( p_sys->list[p_sys->i_list]->psz_path );
free( p_sys->list[p_sys->i_list] );
}
free( p_sys->list );
free( p_sys );
vlc_object_release( s );
}
static void UStreamDestroy( stream_t *s )
{
access_t *p_access = (access_t *)s->p_parent;
AStreamDestroy( s );
access_Delete( p_access );
}
/****************************************************************************
* stream_AccessReset:
****************************************************************************/
void stream_AccessReset( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
p_sys->i_pos = p_sys->p_access->info.i_pos;
if( p_sys->method == Block )
{
block_ChainRelease( p_sys->block.p_first );
/* Init all fields of p_sys->block */
p_sys->block.i_start = p_sys->i_pos;
p_sys->block.i_offset = 0;
p_sys->block.p_current = NULL;
p_sys->block.i_size = 0;
p_sys->block.p_first = NULL;
p_sys->block.pp_last = &p_sys->block.p_first;
/* Do the prebuffering */
AStreamPrebufferBlock( s );
}
else if( p_sys->method == Immediate )
{
stream_buffer_empty( s, stream_buffered_size( s ) );
}
else /* ( p_sys->method == Stream ) */
{
int i;
/* Setup our tracks */
p_sys->stream.i_offset = 0;
p_sys->stream.i_tk = 0;
p_sys->stream.i_used = 0;
for( i = 0; i < STREAM_CACHE_TRACK; i++ )
{
p_sys->stream.tk[i].i_date = 0;
p_sys->stream.tk[i].i_start = p_sys->i_pos;
p_sys->stream.tk[i].i_end = p_sys->i_pos;
}
/* Do the prebuffering */
AStreamPrebufferStream( s );
}
}
/****************************************************************************
* stream_AccessUpdate:
****************************************************************************/
void stream_AccessUpdate( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
p_sys->i_pos = p_sys->p_access->info.i_pos;
if( p_sys->i_list )
{
int i;
for( i = 0; i < p_sys->i_list_index; i++ )
{
p_sys->i_pos += p_sys->list[i]->i_size;
}
}
}
/****************************************************************************
* AStreamControl:
****************************************************************************/
static int AStreamControl( stream_t *s, int i_query, va_list args )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
bool *p_bool;
int64_t *pi_64, i_64;
int i_int;
switch( i_query )
{
case STREAM_GET_SIZE:
pi_64 = (int64_t*)va_arg( args, int64_t * );
if( s->p_sys->i_list )
{
int i;
*pi_64 = 0;
for( i = 0; i < s->p_sys->i_list; i++ )
*pi_64 += s->p_sys->list[i]->i_size;
break;
}
*pi_64 = p_access->info.i_size;
break;
case STREAM_CAN_SEEK:
p_bool = (bool*)va_arg( args, bool * );
access_Control( p_access, ACCESS_CAN_SEEK, p_bool );
break;
case STREAM_CAN_FASTSEEK:
p_bool = (bool*)va_arg( args, bool * );
access_Control( p_access, ACCESS_CAN_FASTSEEK, p_bool );
break;
case STREAM_GET_POSITION:
pi_64 = (int64_t*)va_arg( args, int64_t * );
*pi_64 = p_sys->i_pos;
break;
case STREAM_SET_POSITION:
i_64 = (int64_t)va_arg( args, int64_t );
if( p_sys->method == Block )
return AStreamSeekBlock( s, i_64 );
else if( p_sys->method == Immediate )
return AStreamSeekImmediate( s, i_64 );
else /* ( p_sys->method == Stream ) */
return AStreamSeekStream( s, i_64 );
case STREAM_GET_MTU:
return VLC_EGENERIC;
case STREAM_CONTROL_ACCESS:
i_int = (int) va_arg( args, int );
if( i_int != ACCESS_SET_PRIVATE_ID_STATE &&
i_int != ACCESS_SET_PRIVATE_ID_CA &&
i_int != ACCESS_GET_PRIVATE_ID_STATE )
{
msg_Err( s, "Hey, what are you thinking ?"
"DON'T USE STREAM_CONTROL_ACCESS !!!" );
return VLC_EGENERIC;
}
return access_vaControl( p_access, i_int, args );
case STREAM_GET_CONTENT_TYPE:
return access_Control( p_access, ACCESS_GET_CONTENT_TYPE,
va_arg( args, char ** ) );
default:
msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/****************************************************************************
* Method 1:
****************************************************************************/
static void AStreamPrebufferBlock( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
int64_t i_first = 0;
int64_t i_start;
msg_Dbg( s, "pre buffering" );
i_start = mdate();
for( ;; )
{
int64_t i_date = mdate();
bool b_eof;
block_t *b;
if( s->b_die || p_sys->block.i_size > STREAM_CACHE_PREBUFFER_SIZE ||
( i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date ) )
{
int64_t i_byterate;
/* Update stat */
p_sys->stat.i_bytes = p_sys->block.i_size;
p_sys->stat.i_read_time = i_date - i_start;
i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
(p_sys->stat.i_read_time + 1);
msg_Dbg( s, "prebuffering done %"PRId64" bytes in %"PRId64"s - "
"%"PRId64" kbytes/s",
p_sys->stat.i_bytes,
p_sys->stat.i_read_time / INT64_C(1000000),
i_byterate / 1024 );
break;
}
/* Fetch a block */
if( ( b = AReadBlock( s, &b_eof ) ) == NULL )
{
if( b_eof ) break;
msleep( STREAM_DATA_WAIT );
continue;
}
while( b )
{
/* Append the block */
p_sys->block.i_size += b->i_buffer;
*p_sys->block.pp_last = b;
p_sys->block.pp_last = &b->p_next;
p_sys->stat.i_read_count++;
b = b->p_next;
}
if( p_access->info.b_prebuffered )
{
/* Access has already prebufferred - update stats and exit */
p_sys->stat.i_bytes = p_sys->block.i_size;
p_sys->stat.i_read_time = mdate() - i_start;
break;
}
if( i_first == 0 )
{
i_first = mdate();
msg_Dbg( s, "received first data for our buffer");
}
}
p_sys->block.p_current = p_sys->block.p_first;
}
static int AStreamRefillBlock( stream_t *s );
static int AStreamReadBlock( stream_t *s, void *p_read, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
uint8_t *p_data= (uint8_t*)p_read;
unsigned int i_data = 0;
/* It means EOF */
if( p_sys->block.p_current == NULL )
return 0;
if( p_read == NULL )
{
/* seek within this stream if possible, else use plain old read and discard */
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
bool b_aseek;
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
if( b_aseek )
return AStreamSeekBlock( s, p_sys->i_pos + i_read ) ? 0 : i_read;
}
while( i_data < i_read )
{
int i_current =
p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
unsigned int i_copy = __MIN( (unsigned int)__MAX(i_current,0), i_read - i_data);
/* Copy data */
if( p_data )
{
memcpy( p_data,
&p_sys->block.p_current->p_buffer[p_sys->block.i_offset],
i_copy );
p_data += i_copy;
}
i_data += i_copy;
p_sys->block.i_offset += i_copy;
if( p_sys->block.i_offset >= p_sys->block.p_current->i_buffer )
{
/* Current block is now empty, switch to next */
if( p_sys->block.p_current )
{
p_sys->block.i_offset = 0;
p_sys->block.p_current = p_sys->block.p_current->p_next;
}
/*Get a new block if needed */
if( !p_sys->block.p_current && AStreamRefillBlock( s ) )
{
break;
}
}
}
p_sys->i_pos += i_data;
return i_data;
}
static int AStreamPeekBlock( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
uint8_t *p_data;
unsigned int i_data = 0;
block_t *b;
unsigned int i_offset;
if( p_sys->block.p_current == NULL ) return 0; /* EOF */
/* We can directly give a pointer over our buffer */
if( i_read <= p_sys->block.p_current->i_buffer - p_sys->block.i_offset )
{
*pp_peek = &p_sys->block.p_current->p_buffer[p_sys->block.i_offset];
return i_read;
}
/* We need to create a local copy */
if( p_sys->i_peek < i_read )
{
p_sys->p_peek = realloc( p_sys->p_peek, i_read );
if( !p_sys->p_peek )
{
p_sys->i_peek = 0;
return 0;
}
p_sys->i_peek = i_read;
}
/* Fill enough data */
while( p_sys->block.i_size - (p_sys->i_pos - p_sys->block.i_start)
< i_read )
{
block_t **pp_last = p_sys->block.pp_last;
if( AStreamRefillBlock( s ) ) break;
/* Our buffer are probably filled enough, don't try anymore */
if( pp_last == p_sys->block.pp_last ) break;
}
/* Copy what we have */
b = p_sys->block.p_current;
i_offset = p_sys->block.i_offset;
p_data = p_sys->p_peek;
while( b && i_data < i_read )
{
unsigned int i_current = __MAX(b->i_buffer - i_offset,0);
int i_copy = __MIN( i_current, i_read - i_data );
memcpy( p_data, &b->p_buffer[i_offset], i_copy );
i_data += i_copy;
p_data += i_copy;
i_offset += i_copy;
if( i_offset >= b->i_buffer )
{
i_offset = 0;
b = b->p_next;
}
}
*pp_peek = p_sys->p_peek;
return i_data;
}
static int AStreamSeekBlock( stream_t *s, int64_t i_pos )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
int64_t i_offset = i_pos - p_sys->block.i_start;
bool b_seek;
/* We already have thoses data, just update p_current/i_offset */
if( i_offset >= 0 && i_offset < p_sys->block.i_size )
{
block_t *b = p_sys->block.p_first;
int i_current = 0;
while( i_current + b->i_buffer < i_offset )
{
i_current += b->i_buffer;
b = b->p_next;
}
p_sys->block.p_current = b;
p_sys->block.i_offset = i_offset - i_current;
p_sys->i_pos = i_pos;
return VLC_SUCCESS;
}
/* We may need to seek or to read data */
if( i_offset < 0 )
{
bool b_aseek;
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
if( !b_aseek )
{
msg_Err( s, "backward seeking impossible (access not seekable)" );
return VLC_EGENERIC;
}
b_seek = true;
}
else
{
bool b_aseek, b_aseekfast;
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
access_Control( p_access, ACCESS_CAN_FASTSEEK, &b_aseekfast );
if( !b_aseek )
{
b_seek = false;
msg_Warn( s, "%"PRId64" bytes need to be skipped "
"(access non seekable)",
i_offset - p_sys->block.i_size );
}
else
{
int64_t i_skip = i_offset - p_sys->block.i_size;
/* Avg bytes per packets */
int i_avg = p_sys->stat.i_bytes / p_sys->stat.i_read_count;
/* TODO compute a seek cost instead of fixed threshold */
int i_th = b_aseekfast ? 1 : 5;
if( i_skip <= i_th * i_avg &&
i_skip < STREAM_CACHE_SIZE )
b_seek = false;
else
b_seek = true;
msg_Dbg( s, "b_seek=%d th*avg=%d skip=%"PRId64,
b_seek, i_th*i_avg, i_skip );
}
}
if( b_seek )
{
int64_t i_start, i_end;
/* Do the access seek */
i_start = mdate();
if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
i_end = mdate();
/* Release data */
block_ChainRelease( p_sys->block.p_first );
/* Reinit */
p_sys->block.i_start = p_sys->i_pos = i_pos;
p_sys->block.i_offset = 0;
p_sys->block.p_current = NULL;
p_sys->block.i_size = 0;
p_sys->block.p_first = NULL;
p_sys->block.pp_last = &p_sys->block.p_first;
/* Refill a block */
if( AStreamRefillBlock( s ) )
return VLC_EGENERIC;
/* Update stat */
p_sys->stat.i_seek_time += i_end - i_start;
p_sys->stat.i_seek_count++;
return VLC_SUCCESS;
}
else
{
do
{
/* Read and skip enough data */
if( AStreamRefillBlock( s ) )
return VLC_EGENERIC;
while( p_sys->block.p_current &&
p_sys->i_pos + p_sys->block.p_current->i_buffer - p_sys->block.i_offset < i_pos )
{
p_sys->i_pos += p_sys->block.p_current->i_buffer - p_sys->block.i_offset;
p_sys->block.p_current = p_sys->block.p_current->p_next;
p_sys->block.i_offset = 0;
}
}
while( p_sys->block.i_start + p_sys->block.i_size < i_pos );
p_sys->block.i_offset = i_pos - p_sys->i_pos;
p_sys->i_pos = i_pos;
return VLC_SUCCESS;
}
return VLC_EGENERIC;
}
static int AStreamRefillBlock( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
int64_t i_start, i_stop;
block_t *b;
/* Release data */
while( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
p_sys->block.p_first != p_sys->block.p_current )
{
block_t *b = p_sys->block.p_first;
p_sys->block.i_start += b->i_buffer;
p_sys->block.i_size -= b->i_buffer;
p_sys->block.p_first = b->p_next;
block_Release( b );
}
if( p_sys->block.i_size >= STREAM_CACHE_SIZE &&
p_sys->block.p_current == p_sys->block.p_first &&
p_sys->block.p_current->p_next ) /* At least 2 packets */
{
/* Enough data, don't read more */
return VLC_SUCCESS;
}
/* Now read a new block */
i_start = mdate();
for( ;; )
{
bool b_eof;
if( s->b_die ) return VLC_EGENERIC;
/* Fetch a block */
if( ( b = AReadBlock( s, &b_eof ) ) ) break;
if( b_eof ) return VLC_EGENERIC;
msleep( STREAM_DATA_WAIT );
}
while( b )
{
i_stop = mdate();
/* Append the block */
p_sys->block.i_size += b->i_buffer;
*p_sys->block.pp_last = b;
p_sys->block.pp_last = &b->p_next;
/* Fix p_current */
if( p_sys->block.p_current == NULL )
p_sys->block.p_current = b;
/* Update stat */
p_sys->stat.i_bytes += b->i_buffer;
p_sys->stat.i_read_time += i_stop - i_start;
p_sys->stat.i_read_count++;
b = b->p_next;
i_start = mdate();
}
return VLC_SUCCESS;
}
/****************************************************************************
* Method 2:
****************************************************************************/
static int AStreamRefillStream( stream_t *s );
static int AStreamReadStream( stream_t *s, void *p_read, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
uint8_t *p_data = (uint8_t *)p_read;
unsigned int i_data = 0;
if( tk->i_start >= tk->i_end ) return 0; /* EOF */
if( p_read == NULL )
{
/* seek within this stream if possible, else use plain old read and discard */
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
/* seeking after EOF is not what we want */
if( !( p_access->info.b_eof ) )
{
bool b_aseek;
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
if( b_aseek )
return AStreamSeekStream( s, p_sys->i_pos + i_read ) ? 0 : i_read;
}
}
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamReadStream: %d pos=%"PRId64" tk=%d start=%"PRId64
" offset=%d end=%"PRId64,
i_read, p_sys->i_pos, p_sys->stream.i_tk,
tk->i_start, p_sys->stream.i_offset, tk->i_end );
#endif
while( i_data < i_read )
{
int i_off = (tk->i_start + p_sys->stream.i_offset) %
STREAM_CACHE_TRACK_SIZE;
unsigned int i_current =
__MAX(0,__MIN( tk->i_end - tk->i_start - p_sys->stream.i_offset,
STREAM_CACHE_TRACK_SIZE - i_off ));
int i_copy = __MIN( i_current, i_read - i_data );
if( i_copy <= 0 ) break; /* EOF */
/* Copy data */
/* msg_Dbg( s, "AStreamReadStream: copy %d", i_copy ); */
if( p_data )
{
memcpy( p_data, &tk->p_buffer[i_off], i_copy );
p_data += i_copy;
}
i_data += i_copy;
p_sys->stream.i_offset += i_copy;
/* Update pos now */
p_sys->i_pos += i_copy;
/* */
p_sys->stream.i_used += i_copy;
if( tk->i_start + p_sys->stream.i_offset >= tk->i_end ||
p_sys->stream.i_used >= p_sys->stream.i_read_size )
{
if( AStreamRefillStream( s ) )
{
/* EOF */
if( tk->i_start >= tk->i_end ) break;
}
}
}
return i_data;
}
static int AStreamPeekStream( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
int64_t i_off;
if( tk->i_start >= tk->i_end ) return 0; /* EOF */
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamPeekStream: %d pos=%"PRId64" tk=%d "
"start=%"PRId64" offset=%d end=%"PRId64,
i_read, p_sys->i_pos, p_sys->stream.i_tk,
tk->i_start, p_sys->stream.i_offset, tk->i_end );
#endif
/* Avoid problem, but that should *never* happen */
if( i_read > STREAM_CACHE_TRACK_SIZE / 2 )
i_read = STREAM_CACHE_TRACK_SIZE / 2;
while( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
{
if( p_sys->stream.i_used <= 1 )
{
/* Be sure we will read something */
p_sys->stream.i_used += i_read -
(tk->i_end - tk->i_start - p_sys->stream.i_offset);
}
if( AStreamRefillStream( s ) ) break;
}
if( tk->i_end - tk->i_start - p_sys->stream.i_offset < i_read )
i_read = tk->i_end - tk->i_start - p_sys->stream.i_offset;
/* Now, direct pointer or a copy ? */
i_off = (tk->i_start + p_sys->stream.i_offset) % STREAM_CACHE_TRACK_SIZE;
if( i_off + i_read <= STREAM_CACHE_TRACK_SIZE )
{
*pp_peek = &tk->p_buffer[i_off];
return i_read;
}
if( p_sys->i_peek < i_read )
{
p_sys->p_peek = realloc( p_sys->p_peek, i_read );
if( !p_sys->p_peek )
{
p_sys->i_peek = 0;
return 0;
}
p_sys->i_peek = i_read;
}
memcpy( p_sys->p_peek, &tk->p_buffer[i_off],
STREAM_CACHE_TRACK_SIZE - i_off );
memcpy( &p_sys->p_peek[STREAM_CACHE_TRACK_SIZE - i_off],
&tk->p_buffer[0], i_read - (STREAM_CACHE_TRACK_SIZE - i_off) );
*pp_peek = p_sys->p_peek;
return i_read;
}
static int AStreamSeekStream( stream_t *s, int64_t i_pos )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
bool b_aseek;
bool b_afastseek;
int i_maxth;
int i_new;
int i;
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamSeekStream: to %"PRId64" pos=%"PRId64
" tk=%d start=%"PRId64" offset=%d end=%"PRId64,
i_pos, p_sys->i_pos, p_sys->stream.i_tk,
p_sys->stream.tk[p_sys->stream.i_tk].i_start,
p_sys->stream.i_offset,
p_sys->stream.tk[p_sys->stream.i_tk].i_end );
#endif
/* Seek in our current track ? */
if( i_pos >= p_sys->stream.tk[p_sys->stream.i_tk].i_start &&
i_pos < p_sys->stream.tk[p_sys->stream.i_tk].i_end )
{
stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamSeekStream: current track" );
#endif
p_sys->i_pos = i_pos;
p_sys->stream.i_offset = i_pos - tk->i_start;
/* If there is not enough data left in the track, refill */
/* \todo How to get a correct value for
* - refilling threshold
* - how much to refill
*/
if( (tk->i_end - tk->i_start ) - p_sys->stream.i_offset <
p_sys->stream.i_read_size )
{
if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
{
p_sys->stream.i_used = STREAM_READ_ATONCE / 2 ;
AStreamRefillStream( s );
}
}
return VLC_SUCCESS;
}
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
if( !b_aseek )
{
/* We can't do nothing */
msg_Dbg( s, "AStreamSeekStream: can't seek" );
return VLC_EGENERIC;
}
/* Date the current track */
p_sys->stream.tk[p_sys->stream.i_tk].i_date = mdate();
/* Try to reuse already read data */
for( i = 0; i < STREAM_CACHE_TRACK; i++ )
{
stream_track_t *tk = &p_sys->stream.tk[i];
if( i_pos >= tk->i_start && i_pos <= tk->i_end )
{
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamSeekStream: reusing %d start=%"PRId64
" end=%"PRId64, i, tk->i_start, tk->i_end );
#endif
/* Seek at the end of the buffer */
if( ASeek( s, tk->i_end ) ) return VLC_EGENERIC;
/* That's it */
p_sys->i_pos = i_pos;
p_sys->stream.i_tk = i;
p_sys->stream.i_offset = i_pos - tk->i_start;
if( p_sys->stream.i_used < 1024 )
p_sys->stream.i_used = 1024;
if( AStreamRefillStream( s ) && i_pos == tk->i_end )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
}
access_Control( p_access, ACCESS_CAN_SEEK, &b_afastseek );
/* FIXME compute seek cost (instead of static 'stupid' value) */
i_maxth = __MIN( p_sys->stream.i_read_size, STREAM_READ_ATONCE / 2 );
if( !b_afastseek )
i_maxth *= 3;
/* FIXME TODO */
#if 0
/* Search closest segment TODO */
for( i = 0; i < STREAM_CACHE_TRACK; i++ )
{
stream_track_t *tk = &p_sys->stream.tk[i];
if( i_pos + i_maxth >= tk->i_start )
{
msg_Dbg( s, "good segment before current pos, TODO" );
}
if( i_pos - i_maxth <= tk->i_end )
{
msg_Dbg( s, "good segment after current pos, TODO" );
}
}
#endif
/* Nothing good, seek and choose oldest segment */
if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
p_sys->i_pos = i_pos;
i_new = 0;
for( i = 1; i < STREAM_CACHE_TRACK; i++ )
{
if( p_sys->stream.tk[i].i_date < p_sys->stream.tk[i_new].i_date )
i_new = i;
}
/* Reset the segment */
p_sys->stream.i_tk = i_new;
p_sys->stream.i_offset = 0;
p_sys->stream.tk[i_new].i_start = i_pos;
p_sys->stream.tk[i_new].i_end = i_pos;
/* Read data */
if( p_sys->stream.i_used < STREAM_READ_ATONCE / 2 )
p_sys->stream.i_used = STREAM_READ_ATONCE / 2;
if( AStreamRefillStream( s ) )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
static int AStreamRefillStream( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
/* We read but won't increase i_start after initial start + offset */
int i_toread =
__MIN( p_sys->stream.i_used, STREAM_CACHE_TRACK_SIZE -
(tk->i_end - tk->i_start - p_sys->stream.i_offset) );
bool b_read = false;
int64_t i_start, i_stop;
if( i_toread <= 0 ) return VLC_EGENERIC; /* EOF */
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamRefillStream: used=%d toread=%d",
p_sys->stream.i_used, i_toread );
#endif
i_start = mdate();
while( i_toread > 0 )
{
int i_off = tk->i_end % STREAM_CACHE_TRACK_SIZE;
int i_read;
if( s->b_die )
return VLC_EGENERIC;
i_read = __MIN( i_toread, STREAM_CACHE_TRACK_SIZE - i_off );
i_read = AReadStream( s, &tk->p_buffer[i_off], i_read );
/* msg_Dbg( s, "AStreamRefillStream: read=%d", i_read ); */
if( i_read < 0 )
{
msleep( STREAM_DATA_WAIT );
continue;
}
else if( i_read == 0 )
{
if( !b_read ) return VLC_EGENERIC;
return VLC_SUCCESS;
}
b_read = true;
/* Update end */
tk->i_end += i_read;
/* Windows of STREAM_CACHE_TRACK_SIZE */
if( tk->i_end - tk->i_start > STREAM_CACHE_TRACK_SIZE )
{
int i_invalid = tk->i_end - tk->i_start - STREAM_CACHE_TRACK_SIZE;
tk->i_start += i_invalid;
p_sys->stream.i_offset -= i_invalid;
}
i_toread -= i_read;
p_sys->stream.i_used -= i_read;
p_sys->stat.i_bytes += i_read;
p_sys->stat.i_read_count++;
}
i_stop = mdate();
p_sys->stat.i_read_time += i_stop - i_start;
return VLC_SUCCESS;
}
static void AStreamPrebufferStream( stream_t *s )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
int64_t i_first = 0;
int64_t i_start;
int64_t i_prebuffer = p_sys->b_quick ? STREAM_CACHE_TRACK_SIZE /100 :
( (p_access->info.i_title > 1 || p_access->info.i_seekpoint > 1) ?
STREAM_CACHE_PREBUFFER_SIZE : STREAM_CACHE_TRACK_SIZE / 3 );
msg_Dbg( s, "pre-buffering..." );
i_start = mdate();
for( ;; )
{
stream_track_t *tk = &p_sys->stream.tk[p_sys->stream.i_tk];
int64_t i_date = mdate();
int i_read;
if( s->b_die || tk->i_end >= i_prebuffer ||
(i_first > 0 && i_first + STREAM_CACHE_PREBUFFER_LENGTH < i_date) )
{
int64_t i_byterate;
/* Update stat */
p_sys->stat.i_bytes = tk->i_end - tk->i_start;
p_sys->stat.i_read_time = i_date - i_start;
i_byterate = ( INT64_C(1000000) * p_sys->stat.i_bytes ) /
(p_sys->stat.i_read_time+1);
msg_Dbg( s, "pre-buffering done %"PRId64" bytes in %"PRId64"s - "
"%"PRId64" kbytes/s",
p_sys->stat.i_bytes,
p_sys->stat.i_read_time / INT64_C(1000000),
i_byterate / 1024 );
break;
}
/* */
i_read = STREAM_CACHE_TRACK_SIZE - tk->i_end;
i_read = __MIN( p_sys->stream.i_read_size, i_read );
i_read = AReadStream( s, &tk->p_buffer[tk->i_end], i_read );
if( i_read < 0 )
{
msleep( STREAM_DATA_WAIT );
continue;
}
else if( i_read == 0 )
{
/* EOF */
break;
}
if( i_first == 0 )
{
i_first = mdate();
msg_Dbg( s, "received first data for our buffer");
}
tk->i_end += i_read;
p_sys->stat.i_read_count++;
}
}
/****************************************************************************
* Method 3:
****************************************************************************/
static int AStreamReadImmediate( stream_t *s, void *p_read, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamReadImmediate p_read=%p i_read=%d",
p_read, i_read );
#endif
/* First, check if we already have some data in the buffer,
* that we could copy directly */
int i_copy = __MIN( stream_buffered_size( s ), i_read );
if( i_copy )
{
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamReadImmediate: copy %d from %p", i_copy, stream_buffer( s ) );
#endif
assert( i_copy <= STREAM_CACHE_SIZE );
if( p_read )
{
memcpy( p_read, stream_buffer( s ), i_copy );
p_read = (uint8_t *)p_read + i_copy;
}
}
/* Now that we've read our buffer we don't need its i_copy bytes */
stream_buffer_empty( s, i_copy );
/* Now check if we have still to really read some data */
int i_to_read = i_read - i_copy;
if( i_to_read )
{
if( p_read )
i_to_read = AReadStream( s, p_read, i_to_read );
else
{
void * dummy = malloc(i_to_read);
i_to_read = AReadStream( s, dummy, i_to_read );
free(dummy);
}
}
p_sys->i_pos += i_to_read;
return i_to_read + i_copy;
}
static int AStreamPeekImmediate( stream_t *s, const uint8_t **pp_peek, unsigned int i_read )
{
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamPeekImmediate: %d size=%"PRId64,
i_read, size_buffered_size( s ) );
#endif
/* Avoid problem, but that shouldn't happen */
if( i_read > STREAM_CACHE_SIZE / 2 )
i_read = STREAM_CACHE_SIZE / 2;
int i_to_read = i_read - stream_buffered_size( s );
if( i_to_read > 0 )
{
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamPeekImmediate: Reading %d",
i_to_read );
#endif
i_to_read = AReadStream( s, stream_buffer( s ) + stream_buffered_size( s ),
i_to_read );
if( i_to_read > 0 )
stream_buffer_fill( s, i_to_read );
}
*pp_peek = stream_buffer( s );
return __MIN(stream_buffered_size( s ), i_read);
}
static int AStreamSeekImmediate( stream_t *s, int64_t i_pos )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
bool b_aseek;
#ifdef STREAM_DEBUG
msg_Dbg( s, "AStreamSeekImmediate to %"PRId64" pos=%"PRId64
i_pos, p_sys->i_pos );
#endif
access_Control( p_access, ACCESS_CAN_SEEK, &b_aseek );
if( !b_aseek )
{
/* We can't do nothing */
msg_Dbg( s, "AStreamSeekImmediate: can't seek" );
return VLC_EGENERIC;
}
/* Just reset our buffer */
stream_buffer_empty( s, stream_buffered_size( s ) );
if( ASeek( s, i_pos ) ) return VLC_EGENERIC;
return VLC_SUCCESS;
}
/****************************************************************************
* stream_ReadLine:
****************************************************************************/
/**
* Read from the stream untill first newline.
* \param s Stream handle to read from
* \return A pointer to the allocated output string. You need to free this when you are done.
*/
#define STREAM_PROBE_LINE 2048
#define STREAM_LINE_MAX (2048*100)
char * stream_ReadLine( stream_t *s )
{
char *p_line = NULL;
int i_line = 0, i_read = 0;
while( i_read < STREAM_LINE_MAX )
{
char *psz_eol;
const uint8_t *p_data;
int i_data;
int64_t i_pos;
/* Probe new data */
i_data = stream_Peek( s, &p_data, STREAM_PROBE_LINE );
if( i_data <= 0 ) break; /* No more data */
/* BOM detection */
i_pos = stream_Tell( s );
if( i_pos == 0 && i_data > 4 )
{
int i_bom_size = 0;
char *psz_encoding = NULL;
if( p_data[0] == 0xEF && p_data[1] == 0xBB && p_data[2] == 0xBF )
{
psz_encoding = strdup( "UTF-8" );
i_bom_size = 3;
}
else if( p_data[0] == 0x00 && p_data[1] == 0x00 )
{
if( p_data[2] == 0xFE && p_data[3] == 0xFF )
{
psz_encoding = strdup( "UTF-32BE" );
s->i_char_width = 4;
i_bom_size = 4;
}
}
else if( p_data[0] == 0xFF && p_data[1] == 0xFE )
{
if( p_data[2] == 0x00 && p_data[3] == 0x00 )
{
psz_encoding = strdup( "UTF-32LE" );
s->i_char_width = 4;
s->b_little_endian = true;
i_bom_size = 4;
}
else
{
psz_encoding = strdup( "UTF-16LE" );
s->b_little_endian = true;
s->i_char_width = 2;
i_bom_size = 2;
}
}
else if( p_data[0] == 0xFE && p_data[1] == 0xFF )
{
psz_encoding = strdup( "UTF-16BE" );
s->i_char_width = 2;
i_bom_size = 2;
}
/* Seek past the BOM */
if( i_bom_size )
{
stream_Seek( s, i_bom_size );
p_data += i_bom_size;
i_data -= i_bom_size;
}
/* Open the converter if we need it */
if( psz_encoding != NULL )
{
input_thread_t *p_input;
msg_Dbg( s, "%s BOM detected", psz_encoding );
p_input = (input_thread_t *)vlc_object_find( s, VLC_OBJECT_INPUT, FIND_PARENT );
if( s->i_char_width > 1 )
{
s->conv = vlc_iconv_open( "UTF-8", psz_encoding );
if( s->conv == (vlc_iconv_t)-1 )
{
msg_Err( s, "iconv_open failed" );
}
}
if( p_input != NULL)
{
var_Create( p_input, "subsdec-encoding", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
var_SetString( p_input, "subsdec-encoding", "UTF-8" );
vlc_object_release( p_input );
}
free( psz_encoding );
}
}
if( i_data % s->i_char_width )
{
/* keep i_char_width boundary */
i_data = i_data - ( i_data % s->i_char_width );
msg_Warn( s, "the read is not i_char_width compatible");
}
if( i_data == 0 )
break;
/* Check if there is an EOL */
if( s->i_char_width == 1 )
{
/* UTF-8: 0A <LF> */
psz_eol = memchr( p_data, '\n', i_data );
}
else
{
const uint8_t *p = p_data;
const uint8_t *p_last = p + i_data - s->i_char_width;
if( s->i_char_width == 2 )
{
if( s->b_little_endian == true)
{
/* UTF-16LE: 0A 00 <LF> */
while( p <= p_last && ( p[0] != 0x0A || p[1] != 0x00 ) )
p += 2;
}
else
{
/* UTF-16BE: 00 0A <LF> */
while( p <= p_last && ( p[1] != 0x0A || p[0] != 0x00 ) )
p += 2;
}
}
else if( s->i_char_width == 4 )
{
if( s->b_little_endian == true)
{
/* UTF-32LE: 0A 00 00 00 <LF> */
while( p <= p_last && ( p[0] != 0x0A || p[1] != 0x00 ||
p[2] != 0x00 || p[3] != 0x00 ) )
p += 4;
}
else
{
/* UTF-32BE: 00 00 00 0A <LF> */
while( p <= p_last && ( p[3] != 0x0A || p[2] != 0x00 ||
p[1] != 0x00 || p[0] != 0x00 ) )
p += 4;
}
}
if( p > p_last )
{
psz_eol = NULL;
}
else
{
psz_eol = (char *)p + ( s->i_char_width - 1 );
}
}
if(psz_eol)
{
i_data = (psz_eol - (char *)p_data) + 1;
p_line = realloc( p_line, i_line + i_data + s->i_char_width ); /* add \0 */
if( !p_line )
goto error;
i_data = stream_Read( s, &p_line[i_line], i_data );
if( i_data <= 0 ) break; /* Hmmm */
i_line += i_data - s->i_char_width; /* skip \n */;
i_read += i_data;
/* We have our line */
break;
}
/* Read data (+1 for easy \0 append) */
p_line = realloc( p_line, i_line + STREAM_PROBE_LINE + s->i_char_width );
if( !p_line )
goto error;
i_data = stream_Read( s, &p_line[i_line], STREAM_PROBE_LINE );
if( i_data <= 0 ) break; /* Hmmm */
i_line += i_data;
i_read += i_data;
}
if( i_read > 0 )
{
int j;
for( j = 0; j < s->i_char_width; j++ )
{
p_line[i_line + j] = '\0';
}
i_line += s->i_char_width; /* the added \0 */
if( s->i_char_width > 1 )
{
size_t i_in = 0, i_out = 0;
const char * p_in = NULL;
char * p_out = NULL;
char * psz_new_line = NULL;
/* iconv */
psz_new_line = malloc( i_line );
if( psz_new_line == NULL )
goto error;
i_in = i_out = (size_t)i_line;
p_in = p_line;
p_out = psz_new_line;
if( vlc_iconv( s->conv, &p_in, &i_in, &p_out, &i_out ) == (size_t)-1 )
{
msg_Err( s, "iconv failed" );
msg_Dbg( s, "original: %d, in %d, out %d", i_line, (int)i_in, (int)i_out );
}
free( p_line );
p_line = psz_new_line;
i_line = (size_t)i_line - i_out; /* does not include \0 */
}
/* Remove trailing LF/CR */
while( i_line >= 2 && ( p_line[i_line-2] == '\r' ||
p_line[i_line-2] == '\n') ) i_line--;
/* Make sure the \0 is there */
p_line[i_line-1] = '\0';
return p_line;
}
error:
/* We failed to read any data, probably EOF */
free( p_line );
if( s->conv != (vlc_iconv_t)(-1) ) vlc_iconv_close( s->conv );
return NULL;
}
/****************************************************************************
* Access reading/seeking wrappers to handle concatenated streams.
****************************************************************************/
static int AReadStream( stream_t *s, void *p_read, unsigned int i_read )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
input_thread_t *p_input = NULL;
int i_read_orig = i_read;
int i_total = 0;
if( s->p_parent && s->p_parent->p_parent &&
s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
p_input = (input_thread_t *)s->p_parent->p_parent;
if( !p_sys->i_list )
{
i_read = p_access->pf_read( p_access, p_read, i_read );
if( p_access->b_die )
vlc_object_kill( s );
if( p_input )
{
vlc_mutex_lock( &p_input->p->counters.counters_lock );
stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read,
&i_total );
stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
(float)i_total, NULL );
stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
vlc_mutex_unlock( &p_input->p->counters.counters_lock );
}
return i_read;
}
i_read = p_sys->p_list_access->pf_read( p_sys->p_list_access, p_read,
i_read );
if( p_access->b_die )
vlc_object_kill( s );
/* If we reached an EOF then switch to the next stream in the list */
if( i_read == 0 && p_sys->i_list_index + 1 < p_sys->i_list )
{
char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
access_t *p_list_access;
msg_Dbg( s, "opening input `%s'", psz_name );
p_list_access = access_New( s, p_access->psz_access, "", psz_name );
if( !p_list_access ) return 0;
if( p_sys->p_list_access != p_access )
access_Delete( p_sys->p_list_access );
p_sys->p_list_access = p_list_access;
/* We have to read some data */
return AReadStream( s, p_read, i_read_orig );
}
/* Update read bytes in input */
if( p_input )
{
vlc_mutex_lock( &p_input->p->counters.counters_lock );
stats_UpdateInteger( s, p_input->p->counters.p_read_bytes, i_read, &i_total );
stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
(float)i_total, NULL );
stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
vlc_mutex_unlock( &p_input->p->counters.counters_lock );
}
return i_read;
}
static block_t *AReadBlock( stream_t *s, bool *pb_eof )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
input_thread_t *p_input = NULL;
block_t *p_block;
bool b_eof;
int i_total = 0;
if( s->p_parent && s->p_parent->p_parent &&
s->p_parent->p_parent->i_object_type == VLC_OBJECT_INPUT )
p_input = (input_thread_t *)s->p_parent->p_parent;
if( !p_sys->i_list )
{
p_block = p_access->pf_block( p_access );
if( p_access->b_die )
vlc_object_kill( s );
if( pb_eof ) *pb_eof = p_access->info.b_eof;
if( p_input && p_block && libvlc_stats (p_access) )
{
vlc_mutex_lock( &p_input->p->counters.counters_lock );
stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
p_block->i_buffer, &i_total );
stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
(float)i_total, NULL );
stats_UpdateInteger( s, p_input->p->counters.p_read_packets, 1, NULL );
vlc_mutex_unlock( &p_input->p->counters.counters_lock );
}
return p_block;
}
p_block = p_sys->p_list_access->pf_block( p_access );
if( p_access->b_die )
vlc_object_kill( s );
b_eof = p_sys->p_list_access->info.b_eof;
if( pb_eof ) *pb_eof = b_eof;
/* If we reached an EOF then switch to the next stream in the list */
if( !p_block && b_eof && p_sys->i_list_index + 1 < p_sys->i_list )
{
char *psz_name = p_sys->list[++p_sys->i_list_index]->psz_path;
access_t *p_list_access;
msg_Dbg( s, "opening input `%s'", psz_name );
p_list_access = access_New( s, p_access->psz_access, "", psz_name );
if( !p_list_access ) return 0;
if( p_sys->p_list_access != p_access )
access_Delete( p_sys->p_list_access );
p_sys->p_list_access = p_list_access;
/* We have to read some data */
return AReadBlock( s, pb_eof );
}
if( p_block )
{
if( p_input )
{
vlc_mutex_lock( &p_input->p->counters.counters_lock );
stats_UpdateInteger( s, p_input->p->counters.p_read_bytes,
p_block->i_buffer, &i_total );
stats_UpdateFloat( s, p_input->p->counters.p_input_bitrate,
(float)i_total, NULL );
stats_UpdateInteger( s, p_input->p->counters.p_read_packets,
1 , NULL);
vlc_mutex_unlock( &p_input->p->counters.counters_lock );
}
}
return p_block;
}
static int ASeek( stream_t *s, int64_t i_pos )
{
stream_sys_t *p_sys = s->p_sys;
access_t *p_access = p_sys->p_access;
/* Check which stream we need to access */
if( p_sys->i_list )
{
int i;
char *psz_name;
int64_t i_size = 0;
access_t *p_list_access = 0;
for( i = 0; i < p_sys->i_list - 1; i++ )
{
if( i_pos < p_sys->list[i]->i_size + i_size ) break;
i_size += p_sys->list[i]->i_size;
}
psz_name = p_sys->list[i]->psz_path;
if( i != p_sys->i_list_index )
msg_Dbg( s, "opening input `%s'", psz_name );
if( i != p_sys->i_list_index && i != 0 )
{
p_list_access =
access_New( s, p_access->psz_access, "", psz_name );
}
else if( i != p_sys->i_list_index )
{
p_list_access = p_access;
}
if( p_list_access )
{
if( p_sys->p_list_access != p_access )
access_Delete( p_sys->p_list_access );
p_sys->p_list_access = p_list_access;
}
p_sys->i_list_index = i;
return p_sys->p_list_access->pf_seek( p_sys->p_list_access,
i_pos - i_size );
}
return p_access->pf_seek( p_access, i_pos );
}
/**
* Try to read "i_read" bytes into a buffer pointed by "p_read". If
* "p_read" is NULL then data are skipped instead of read. The return
* value is the real numbers of bytes read/skip. If this value is less
* than i_read that means that it's the end of the stream.
*/
int stream_Read( stream_t *s, void *p_read, int i_read )
{
return s->pf_read( s, p_read, i_read );
}
/**
* Store in pp_peek a pointer to the next "i_peek" bytes in the stream
* \return The real numbers of valid bytes, if it's less
* or equal to 0, *pp_peek is invalid.
* \note pp_peek is a pointer to internal buffer and it will be invalid as
* soons as other stream_* functions are called.
* \note Due to input limitation, it could be less than i_peek without meaning
* the end of the stream (but only when you have i_peek >=
* p_input->i_bufsize)
*/
int stream_Peek( stream_t *s, const uint8_t **pp_peek, int i_peek )
{
return s->pf_peek( s, pp_peek, i_peek );
}
/**
* Use to control the "stream_t *". Look at #stream_query_e for
* possible "i_query" value and format arguments. Return VLC_SUCCESS
* if ... succeed ;) and VLC_EGENERIC if failed or unimplemented
*/
int stream_vaControl( stream_t *s, int i_query, va_list args )
{
return s->pf_control( s, i_query, args );
}
/**
* Destroy a stream
*/
void stream_Delete( stream_t *s )
{
s->pf_destroy( s );
}
int stream_Control( stream_t *s, int i_query, ... )
{
va_list args;
int i_result;
if ( s == NULL )
return VLC_EGENERIC;
va_start( args, i_query );
i_result = s->pf_control( s, i_query, args );
va_end( args );
return i_result;
}
/**
* Read "i_size" bytes and store them in a block_t.
* It always read i_size bytes unless you are at the end of the stream
* where it return what is available.
*/
block_t *stream_Block( stream_t *s, int i_size )
{
if( i_size <= 0 ) return NULL;
/* emulate block read */
block_t *p_bk = block_New( s, i_size );
if( p_bk )
{
int i_read = stream_Read( s, p_bk->p_buffer, i_size );
if( i_read > 0 )
{
p_bk->i_buffer = i_read;
return p_bk;
}
block_Release( p_bk );
}
return NULL;
}
