* Don't use alloca for audio buffers on OSX and BSD, because the stacksize on both isn't infinite.

  This might explain the audio-core crashes we have seen in the past on Mac OS X 
* Fix issues with platforms which don't have alloca() (defined)

include/aout_internal.h

@@ -34,6 +34,10 @@ typedef struct aout_alloc_t
 #define AOUT_ALLOC_STACK    1
 #define AOUT_ALLOC_HEAP     2
 
+#if defined( __APPLE__ ) || defined( SYS_BSD )
+#undef HAVE_ALLOCA
+#endif
+
 #ifdef HAVE_ALLOCA
 #   define ALLOCA_TEST( p_alloc, p_new_buffer )                             \
         if ( (p_alloc)->i_alloc_type == AOUT_ALLOC_STACK )                  \

modules/audio_filter/resampler/linear.c

@@ -137,7 +137,7 @@ static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
                     aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
 {
     filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
-    float *p_in, *p_out = (float *)p_out_buf->p_buffer;
+    float *p_in_orig, *p_in, *p_out = (float *)p_out_buf->p_buffer;
     float *p_prev_sample = (float *)p_sys->p_prev_sample;
 
     int i_nb_channels = aout_FormatNbChannels( &p_filter->input );

modules/demux/mp4/mp4.c

@@ -406,7 +406,13 @@ static int Open( vlc_object_t * p_this )
                     else
                     {
                         /* msg dbg relative ? */
-                        char *psz_absolute = alloca( strlen( p_demux->psz_access ) + 3 + strlen( p_demux->psz_path ) + strlen( psz_ref ) + 1);
+                        int i_path_size = strlen( p_demux->psz_access ) + 3 +
+                                         strlen( p_demux->psz_path ) + strlen( psz_ref ) + 1;
+#ifdef HAVE_ALLOCA
+                        char *psz_absolute = alloca( i_path_size );
+#else
+                        char *psz_absolute = (char *)malloc( i_path_size );
+#endif
                         char *end = strrchr( p_demux->psz_path, '/' );
 
                         if( end )
@@ -439,6 +445,9 @@ static int Open( vlc_object_t * p_this )
                                 b_play = VLC_TRUE;
                             }
                         }
+#ifndef HAVE_ALLOCA
+                        free( psz_absolute );
+#endif
                     }
                 }
                 else