ffmpeg add neon assembly to gyp and fix offsets with simple values...

source/patched-ffmpeg-mt/libavcodec/arm/asm-offsets.h

Index: source/patched-ffmpeg-mt/libavcodec/arm/asm-offsets.h
===================================================================
--- source/patched-ffmpeg-mt/libavcodec/arm/asm-offsets.h	(revision 62568)
+++ source/patched-ffmpeg-mt/libavcodec/arm/asm-offsets.h	(working copy)
@@ -29,10 +29,20 @@
 #endif
 
 /* MpegEncContext */
-#define Y_DC_SCALE               ((int)&(((MpegEncContext*)0)->y_dc_scale))
-#define C_DC_SCALE               ((int)&(((MpegEncContext*)0)->c_dc_scale))
-#define AC_PRED                  ((int)&(((MpegEncContext*)0)->ac_pred))
-#define BLOCK_LAST_INDEX         ((int)&(((MpegEncContext*)0)->block_last_index[0]))
-#define INTER_SCANTAB_RASTER_END ((int)&(((MpegEncContext*)0)->inter_scantable.raster_end))
-#define H263_AIC                 ((int)&(((MpegEncContext*)0)->h263_aic))
+#if defined(__ARM_EABI__) || defined(__eabi__)
+#define Y_DC_SCALE               (0xa54+72)
+#define C_DC_SCALE               (0xa58+72)
+#define AC_PRED                  (0xa80+72)
+#define BLOCK_LAST_INDEX         (0x2160+72)
+#define INTER_SCANTAB_RASTER_END (0x2360+72)
+#define H263_AIC                 (0x2610+80)
+#elif defined(__APPLE__)
+#define Y_DC_SCALE               0xa30
+#define C_DC_SCALE               0xa34
+#define AC_PRED                  0xa5c
+#define BLOCK_LAST_INDEX         0x213c
+#define INTER_SCANTAB_RASTER_END 0x233c
+#define H263_AIC                 0x25e0
 #endif
+
+#endif