/*****************************************************************************
- * mem_stream.c
+ * mem_stream.c: stream_t wrapper around memory buffer
*****************************************************************************
- * Copyright (C) 1999-2004 VideoLAN
- * $Id: stream.c 9390 2004-11-22 09:56:48Z fenrir $
+ * Copyright (C) 1999-2004 the VideoLAN team
+ * $Id$
*
- * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
+ * Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
*
* 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
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
-#include <stdlib.h>
#include <vlc/vlc.h>
-#include <vlc/input.h>
#include "input_internal.h"
struct stream_sys_t
{
+ vlc_bool_t i_preserve_memory;
int64_t i_pos; /* Current reading offset */
int64_t i_size;
uint8_t *p_buffer;
};
-static int AStreamReadMem( stream_t *, void *p_read, int i_read );
-static int AStreamPeekMem( stream_t *, uint8_t **pp_peek, int i_read );
-static int AStreamControl( stream_t *, int i_query, va_list );
+static int Read ( stream_t *, void *p_read, int i_read );
+static int Peek ( stream_t *, const uint8_t **pp_peek, int i_read );
+static int Control( stream_t *, int i_query, va_list );
+static void Delete ( stream_t * );
-/****************************************************************************
- * stream_MemoryNew: create a stream from a buffer
- ****************************************************************************/
+/**
+ * Create a stream from a memory buffer
+ *
+ * \param p_this the calling vlc_object
+ * \param p_buffer the memory buffer for the stream
+ * \param i_buffer the size of the buffer
+ * \param i_preserve_memory if this is set to VLC_FALSE the memory buffer
+ * pointed to by p_buffer is freed on stream_Destroy
+ */
stream_t *__stream_MemoryNew( vlc_object_t *p_this, uint8_t *p_buffer,
- int64_t i_size )
+ int64_t i_size, vlc_bool_t i_preserve_memory )
{
- stream_t *s = vlc_object_create( p_this, VLC_OBJECT_STREAM );
+ stream_t *s = vlc_stream_create( p_this );
stream_sys_t *p_sys;
- if( !s )
- return NULL;
+ if( !s ) return NULL;
s->p_sys = p_sys = malloc( sizeof( stream_sys_t ) );
p_sys->i_pos = 0;
p_sys->i_size = i_size;
p_sys->p_buffer = p_buffer;
+ p_sys->i_preserve_memory = i_preserve_memory;
- s->pf_block = NULL;
- s->pf_read = AStreamReadMem; /* Set up later */
- s->pf_peek = AStreamPeekMem;
- s->pf_control= AStreamControl;
+ s->pf_read = Read;
+ s->pf_peek = Peek;
+ s->pf_control = Control;
+ s->pf_destroy = Delete;
+
+ s->i_char_width = 1;
+ s->b_little_endian = VLC_FALSE;
vlc_object_attach( s, p_this );
-
+
return s;
}
-void stream_MemoryDelete( stream_t *s, vlc_bool_t b_free_buffer )
+static void Delete( stream_t *s )
{
- if( b_free_buffer )
- {
- free( s->p_sys->p_buffer );
- }
+ if( !s->p_sys->i_preserve_memory ) free( s->p_sys->p_buffer );
free( s->p_sys );
+ vlc_object_detach( s );
vlc_object_destroy( s );
}
+
/****************************************************************************
* AStreamControl:
****************************************************************************/
-static int AStreamControl( stream_t *s, int i_query, va_list args )
+static int Control( stream_t *s, int i_query, va_list args )
{
stream_sys_t *p_sys = s->p_sys;
case STREAM_SET_POSITION:
i_64 = (int64_t)va_arg( args, int64_t );
i_64 = __MAX( i_64, 0 );
- i_64 = __MIN( i_64, s->p_sys->i_size );
+ i_64 = __MIN( i_64, s->p_sys->i_size );
p_sys->i_pos = i_64;
+ break;
case STREAM_GET_MTU:
return VLC_EGENERIC;
return VLC_SUCCESS;
}
-static int AStreamReadMem( stream_t *s, void *p_read, int i_read )
+static int Read( stream_t *s, void *p_read, int i_read )
{
stream_sys_t *p_sys = s->p_sys;
int i_res = __MIN( i_read, p_sys->i_size - p_sys->i_pos );
return i_res;
}
-static int AStreamPeekMem( stream_t *s, uint8_t **pp_peek, int i_read )
+static int Peek( stream_t *s, const uint8_t **pp_peek, int i_read )
{
stream_sys_t *p_sys = s->p_sys;
int i_res = __MIN( i_read, p_sys->i_size - p_sys->i_pos );