all: new stream_t reading from a buffer.

Makefile.am

@@ -340,6 +340,7 @@ SOURCES_libvlc_common = \
 	src/input/input.c \
 	src/input/input_internal.h \
 	src/input/stream.c \
+	src/input/mem_stream.c \
 	src/input/subtitles.c \
 	src/input/var.c \
 	src/video_output/video_output.c \

include/vlc_stream.h

@@ -2,7 +2,7 @@
  * vlc_stream.h
  *****************************************************************************
  * Copyright (C) 1999-2004 VideoLAN
- * $Id: ninput.h 7930 2004-06-07 18:23:15Z fenrir $
+ * $Id$
  *
  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
  *
@@ -176,7 +176,9 @@ VLC_EXPORT( char *, stream_ReadLine, ( stream_t * ) );
 VLC_EXPORT( stream_t *,__stream_DemuxNew, ( vlc_object_t *p_obj, char *psz_demux, es_out_t *out ) );
 VLC_EXPORT( void,      stream_DemuxSend,  ( stream_t *s, block_t *p_block ) );
 VLC_EXPORT( void,      stream_DemuxDelete,( stream_t *s ) );
-
+#define stream_MemoryNew( a, b, c ) __stream_MemoryNew( VLC_OBJECT(a), b, c )
+VLC_EXPORT( stream_t *,__stream_MemoryNew, (vlc_object_t *p_obj, uint8_t *p_buffer, int64_t i_size ) );
+VLC_EXPORT( void,      stream_MemoryDelete,( stream_t *s, vlc_bool_t b_free_buffer ) );
 /**
  * @}
  */

src/input/mem_stream.c

+/*****************************************************************************
+ * mem_stream.c
+ *****************************************************************************
+ * Copyright (C) 1999-2004 VideoLAN
+ * $Id: stream.c 9390 2004-11-22 09:56:48Z fenrir $
+ *
+ * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#include <stdlib.h>
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+
+#include "input_internal.h"
+
+struct stream_sys_t
+{
+    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  AStreamSeekMem( stream_t *s, int64_t i_pos );
+static int  AStreamControl( stream_t *, int i_query, va_list );
+
+/****************************************************************************
+ * stream_MemoryNew: create a stream from a buffer
+ ****************************************************************************/
+stream_t *__stream_MemoryNew( vlc_object_t *p_this, uint8_t *p_buffer,
+                              int64_t i_size )
+{
+    stream_t *s = vlc_object_create( p_this, VLC_OBJECT_STREAM );
+    stream_sys_t *p_sys;
+
+    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;
+
+    s->pf_block  = NULL;
+    s->pf_read   = AStreamReadMem;    /* Set up later */
+    s->pf_peek   = AStreamPeekMem;
+    s->pf_control= AStreamControl;
+    vlc_object_attach( s, p_this );
+    
+    return s;
+}
+
+void stream_MemoryDelete( stream_t *s, vlc_bool_t b_free_buffer )
+{
+    if( b_free_buffer )
+    {
+        free( s->p_sys->p_buffer );
+    }
+    free( s->p_sys );
+    vlc_object_destroy( s );
+}
+/****************************************************************************
+ * AStreamControl:
+ ****************************************************************************/
+static int AStreamControl( stream_t *s, int i_query, va_list args )
+{
+    stream_sys_t *p_sys = s->p_sys;
+
+    vlc_bool_t *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 * );
+            *pi_64 = p_sys->i_size;
+            break;
+
+        case STREAM_CAN_SEEK:
+            p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
+            *p_bool = VLC_TRUE;
+            break;
+
+        case STREAM_CAN_FASTSEEK:
+            p_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
+            *p_bool = VLC_TRUE;
+            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 );
+            p_sys->i_pos = i_64;
+
+        case STREAM_GET_MTU:
+            return VLC_EGENERIC;
+
+        case STREAM_CONTROL_ACCESS:
+            i_int = (int) va_arg( args, int );
+            msg_Err( s, "Hey, what are you thinking ?"
+                     "DON'T USE STREAM_CONTROL_ACCESS !!!" );
+            return VLC_EGENERIC;
+
+        default:
+            msg_Err( s, "invalid stream_vaControl query=0x%x", i_query );
+            return VLC_EGENERIC;
+    }
+    return VLC_SUCCESS;
+}
+
+static int  AStreamReadMem( 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 );
+    memcpy( p_read, p_sys->p_buffer + p_sys->i_pos, i_res );
+    p_sys->i_pos += i_res;
+    return i_res;
+}
+
+static int  AStreamPeekMem( stream_t *s, 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 );
+    *pp_peek = p_sys->p_buffer + p_sys->i_pos;
+    return i_res;
+}
+
+static int  AStreamSeekMem( stream_t *s, int64_t i_pos )
+{
+    int64_t i_new_pos;
+    i_new_pos = __MAX( i_pos, 0 );
+    i_new_pos = __MIN( i_new_pos, s->p_sys->i_size ); 
+    s->p_sys->i_pos = i_new_pos;
+}