SDP: dummy access that return the URL path

With this, we can parse an SDP the same way if it comes from SAP
(as sdp://...) or from a file or the network.

modules/access/Modules.am

@@ -21,6 +21,11 @@ libfilesystem_plugin_la_CFLAGS = $(AM_CFLAGS)
 libfilesystem_plugin_la_LIBADD = $(AM_LIBADD)
 libfilesystem_plugin_la_DEPENDENCIES =
 
+libsdp_plugin_la_SOURCES = sdp.c
+libsdp_plugin_la_CFLAGS = $(AM_CFLAGS)
+libsdp_plugin_la_LIBADD = $(AM_LIBADD)
+libsdp_plugin_la_DEPENDENCIES =
+
 SOURCES_access_mmap = mmap.c
 SOURCES_access_directory = directory.c
 SOURCES_access_dv = dv.c
@@ -54,6 +59,7 @@ SOURCES_access_vdr = vdr.c
 SOURCES_libbluray = bluray.c
 SOURCES_decklink = decklink.cpp
 
+
 SOURCES_access_rar = rar/rar.c rar/rar.h rar/access.c
 SOURCES_stream_filter_rar = rar/rar.c rar/rar.h rar/stream.c
 
@@ -75,6 +81,7 @@ libvlc_LTLIBRARIES += \
 	libaccess_ftp_plugin.la \
 	libaccess_imem_plugin.la \
 	libaccess_attachment_plugin.la \
+        libsdp_plugin.la \
 	libaccess_rar_plugin.la \
 	libstream_filter_rar_plugin.la \
 	libaccess_vdr_plugin.la \

modules/access/sdp.c

+/*****************************************************************************
+ * sdp.c: Fake input for sdp:// scheme
+ *****************************************************************************
+ * Copyright (C) 2010 Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 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 Lesser 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 <vlc_plugin.h>
+#include <vlc_access.h>
+
+static int Open (vlc_object_t *);
+static void Close (vlc_object_t *);
+
+vlc_module_begin ()
+    set_shortname (N_("SDP"))
+    set_description (N_("Session Description Protocol"))
+    set_category (CAT_INPUT)
+    set_subcategory (SUBCAT_INPUT_ACCESS)
+
+    set_capability ("access", 0)
+    set_callbacks (Open, Close)
+    add_shortcut ("sdp")
+vlc_module_end()
+
+static ssize_t Read (access_t *, uint8_t *, size_t);
+static int Seek (access_t *, uint64_t);
+static int Control (access_t *, int, va_list);
+
+struct access_sys_t
+{
+    size_t length;
+    char   data[0];
+};
+
+static int Open (vlc_object_t *obj)
+{
+    access_t *access = (access_t *)obj;
+    size_t len = strlen (access->psz_location);
+
+    access_sys_t *sys = malloc (sizeof(*sys) + len);
+    if (unlikely(sys == NULL))
+        return VLC_ENOMEM;
+
+    /* NOTE: This copy is not really needed. Better safe than sorry. */
+    sys->length = len;
+    memcpy (sys->data, access->psz_location, len);
+
+    access_InitFields (access);
+    access->pf_read = Read;
+    access->pf_block = NULL;
+    access->pf_seek = Seek;
+    access->pf_control = Control;
+    access->p_sys = sys;
+
+    return VLC_SUCCESS;
+}
+
+static void Close (vlc_object_t *obj)
+{
+    access_t *access = (access_t *)obj;
+    access_sys_t *sys = access->p_sys;
+
+    free (sys);
+}
+
+static ssize_t Read (access_t *access, uint8_t *buf, size_t len)
+{
+    access_sys_t *sys = access->p_sys;
+
+    if (access->info.i_pos >= sys->length)
+    {
+        access->info.b_eof = true;
+        return 0;
+    }
+
+    if (len > sys->length)
+        len = sys->length;
+    memcpy (buf, sys->data + access->info.i_pos, len);
+    access->info.i_pos += len;
+    return len;
+}
+
+static int Seek (access_t *access, uint64_t position)
+{
+    access->info.i_pos = position;
+    access->info.b_eof = false;
+    return VLC_SUCCESS;
+}
+
+static int Control (access_t *access, int query, va_list args)
+{
+    switch (query)
+    {
+        case ACCESS_CAN_SEEK:
+        case ACCESS_CAN_FASTSEEK:
+        case ACCESS_CAN_PAUSE:
+        case ACCESS_CAN_CONTROL_PACE:
+        {
+            bool *b = va_arg(args, bool*);
+            *b = true;
+            return VLC_SUCCESS;
+        }
+
+        case ACCESS_GET_PTS_DELAY:
+        {
+            int64_t *dp = va_arg(args, int64_t *);
+            *dp = DEFAULT_PTS_DELAY;
+            return VLC_SUCCESS;
+        }
+    
+        case ACCESS_SET_PAUSE_STATE:
+            return VLC_SUCCESS;
+    }
+    (void) access;
+    return VLC_EGENERIC;
+}