ARM: fail build if hardcoded struct offsets are wrong

Originally committed as revision 23427 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 39 insertions, 0 deletions

diff --git a/libavcodec/arm/asm-offsets.h b/libavcodec/arm/asm-offsets.h
new file mode 100644
index 0000000000..c0cfb276f1
--- /dev/null
+++ b/libavcodec/arm/asm-offsets.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2010 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_ARM_ASM_OFFSETS_H
+#define AVCODEC_ARM_ASM_OFFSETS_H
+
+#ifndef __ASSEMBLER__
+#include <stddef.h>
+#define CHK_OFFS(s, m, o) struct check_##o {    \
+        int x_##o[offsetof(s, m) == o? 1: -1];  \
+    }
+#endif
+
+/* MpegEncContext */
+#define Y_DC_SCALE               0xa54
+#define C_DC_SCALE               0xa58
+#define AC_PRED                  0xa80
+#define BLOCK_LAST_INDEX         0x2278
+#define INTER_SCANTAB_RASTER_END 0x2478
+#define H263_AIC                 0x2728
+
+#endif