Use g_memdup2() where available and add fallback for older GLib versions

- x264 encoder bitrate profile manager: alloc size is based
  on existing allocation
- asfdemux: change length var to 64-bit and check for G_MAXUINT
- realmedia: opaque_data_len is read from 32 bits and then
  only subtracted upon.

g_memdup() is deprecated since GLib 2.68 and we want to avoid
deprecation warnings with recent versions of GLib.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-ugly/-/merge_requests/83>

4 files changed, 17 insertions, 7 deletions

diff --git a/ext/x264/gstencoderbitrateprofilemanager.c b/ext/x264/gstencoderbitrateprofilemanager.c
index 5ef83eec..ed2371e1 100644
--- a/ext/x264/gstencoderbitrateprofilemanager.c
+++ b/ext/x264/gstencoderbitrateprofilemanager.c
@@ -18,6 +18,9 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 #include "gstencoderbitrateprofilemanager.h"
 
@@ -95,7 +98,7 @@ gst_encoder_bitrate_profile_manager_add_profile (GstEncoderBitrateProfileManager
     * self, const gchar * profile_name,
     const GstEncoderBitrateTargetForPixelsMap * map)
 {
-  gint n_vals;
+  guint n_vals;
   GstEncoderBitrateProfile *profile;
 
   for (n_vals = 0;
@@ -107,7 +110,7 @@ gst_encoder_bitrate_profile_manager_add_profile (GstEncoderBitrateProfileManager
   profile->name = g_strdup (profile_name);
   profile->n_vals = n_vals;
   profile->map
-      = g_memdup (map, sizeof (GstEncoderBitrateTargetForPixelsMap) * n_vals);
+      = g_memdup2 (map, sizeof (GstEncoderBitrateTargetForPixelsMap) * n_vals);
   self->profiles = g_list_prepend (self->profiles, profile);
 }
 
diff --git a/gst/asfdemux/gstasfdemux.c b/gst/asfdemux/gstasfdemux.c
index 2cf236c9..0c8dc848 100644
--- a/gst/asfdemux/gstasfdemux.c
+++ b/gst/asfdemux/gstasfdemux.c
@@ -2458,15 +2458,18 @@ gst_asf_demux_get_buffer (GstBuffer ** p_buf, guint num_bytes_to_read,
 }
 
 static gboolean
-gst_asf_demux_get_bytes (guint8 ** p_buf, guint num_bytes_to_read,
+gst_asf_demux_get_bytes (guint8 ** p_buf, guint64 num_bytes_to_read,
     guint8 ** p_data, guint64 * p_size)
 {
   *p_buf = NULL;
 
+  if (num_bytes_to_read >= G_MAXUINT)
+    return FALSE;
+
   if (*p_size < num_bytes_to_read)
     return FALSE;
 
-  *p_buf = g_memdup (*p_data, num_bytes_to_read);
+  *p_buf = g_memdup2 (*p_data, num_bytes_to_read);
   *p_data += num_bytes_to_read;
   *p_size -= num_bytes_to_read;
   return TRUE;
diff --git a/gst/realmedia/rtspreal.c b/gst/realmedia/rtspreal.c
index 2fec0371..5804747e 100644
--- a/gst/realmedia/rtspreal.c
+++ b/gst/realmedia/rtspreal.c
@@ -436,7 +436,7 @@ rtsp_ext_real_parse_sdp (GstRTSPExtension * ext, GstSDPMessage * sdp,
     if (strncmp (opaque_data, "MLTI", 4)) {
       GST_DEBUG_OBJECT (ctx, "no MLTI found, appending all");
       stream->type_specific_data_len = opaque_data_len;
-      stream->type_specific_data = g_memdup (opaque_data, opaque_data_len);
+      stream->type_specific_data = g_memdup2 (opaque_data, opaque_data_len);
       goto no_type_specific;
     }
     opaque_data += 4;
@@ -530,7 +530,7 @@ rtsp_ext_real_parse_sdp (GstRTSPExtension * ext, GstSDPMessage * sdp,
       goto strange_opaque_data;
     }
     stream->type_specific_data =
-        g_memdup (opaque_data, stream->type_specific_data_len);
+        g_memdup2 (opaque_data, stream->type_specific_data_len);
 
   no_type_specific:
     size =
diff --git a/meson.build b/meson.build
index f1846c61..4d8d1d4c 100644
--- a/meson.build
+++ b/meson.build
@@ -18,7 +18,7 @@ gst_version_is_dev = gst_version_minor % 2 == 1 and gst_version_micro < 90
 
 have_cxx = add_languages('cpp', native: false, required: false)
 
-glib_req = '>= 2.44.0'
+glib_req = '>= 2.56.0'
 gst_req = '>= @0@.@1@.0'.format(gst_version_major, gst_version_minor)
 
 api_version = '1.0'
@@ -168,6 +168,10 @@ endif
 
 gmodule_dep = dependency('gmodule-2.0', fallback : ['glib', 'libgmodule_dep'])
 
+if gmodule_dep.version().version_compare('< 2.67.4')
+  cdata.set('g_memdup2(ptr,sz)', '(G_LIKELY(((guint64)(sz)) < G_MAXUINT)) ? g_memdup(ptr,sz) : (g_abort(),NULL)')
+endif
+
 ugly_args = ['-DHAVE_CONFIG_H']
 configinc = include_directories('.')
 libsinc = include_directories('gst-libs')