Sanitize input headers (pass 4).

[vlc] / src / input / stream_memory.c

diff --git a/src/input/stream_memory.c b/src/input/stream_memory.c
new file mode 100644 (file)
index 0000000..341f5f6
--- /dev/null
+++ b/src/input/stream_memory.c
@@ -0,0 +1,159 @@
+/*****************************************************************************
+ * stream_memory.c: stream_t wrapper around memory buffer
+ *****************************************************************************
+ * Copyright (C) 1999-2008 the VideoLAN team
+ * $Id$
+ *
+ * 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
+ * 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 "stream.h"
+
+struct stream_sys_t
+{
+    bool  i_preserve_memory;
+    int64_t     i_pos;      /* Current reading offset */
+    int64_t     i_size;
+    uint8_t    *p_buffer;
+
+};
+
+static int  Read   ( stream_t *, void *p_read, unsigned int i_read );
+static int  Peek   ( stream_t *, const uint8_t **pp_peek, unsigned int i_read );
+static int  Control( stream_t *, int i_query, va_list );
+static void Delete ( stream_t * );
+
+/**
+ * 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 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, bool i_preserve_memory )
+{
+    stream_t *s = vlc_stream_create( p_this );
+    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;
+    p_sys->i_preserve_memory = i_preserve_memory;
+
+    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 = false;
+    vlc_object_attach( s, p_this );
+
+    return s;
+}
+
+static void Delete( stream_t *s )
+{
+    if( !s->p_sys->i_preserve_memory ) free( s->p_sys->p_buffer );
+    free( s->p_sys );
+    vlc_object_detach( s );
+    vlc_object_release( s );
+}
+
+/****************************************************************************
+ * AStreamControl:
+ ****************************************************************************/
+static int Control( stream_t *s, int i_query, va_list args )
+{
+    stream_sys_t *p_sys = s->p_sys;
+
+    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 * );
+            *pi_64 = p_sys->i_size;
+            break;
+
+        case STREAM_CAN_SEEK:
+            p_bool = (bool*)va_arg( args, bool * );
+            *p_bool = true;
+            break;
+
+        case STREAM_CAN_FASTSEEK:
+            p_bool = (bool*)va_arg( args, bool * );
+            *p_bool = 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 );
+            i_64 = __MAX( i_64, 0 );
+            i_64 = __MIN( i_64, s->p_sys->i_size );
+            p_sys->i_pos = i_64;
+            break;
+
+        case STREAM_GET_MTU:
+        case STREAM_GET_CONTENT_TYPE:
+            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 Read( stream_t *s, void *p_read, unsigned 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 Peek( stream_t *s, const uint8_t **pp_peek, unsigned 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;
+}