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ARM: fail build if hardcoded struct offsets are wrong

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Originally committed as revision 23427 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-06-02 18:49:53 +00:00
parent 83b7076131
commit a76eec3b78
3 changed files with 48 additions and 7 deletions
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39
libavcodec/arm/asm-offsets.h Normal file
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@ -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

8
libavcodec/arm/mpegvideo_arm.c
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@ -22,6 +22,14 @@
#include "libavcodec/dsputil.h"
#include "libavcodec/mpegvideo.h"
#include "mpegvideo_arm.h"
#include "asm-offsets.h"
CHK_OFFS(MpegEncContext, y_dc_scale, Y_DC_SCALE);
CHK_OFFS(MpegEncContext, c_dc_scale, C_DC_SCALE);
CHK_OFFS(MpegEncContext, ac_pred, AC_PRED);
CHK_OFFS(MpegEncContext, block_last_index, BLOCK_LAST_INDEX);
CHK_OFFS(MpegEncContext, inter_scantable.raster_end, INTER_SCANTAB_RASTER_END);
CHK_OFFS(MpegEncContext, h263_aic, H263_AIC);
void ff_dct_unquantize_h263_inter_neon(MpegEncContext *s, DCTELEM *block,
int n, int qscale);

8
libavcodec/arm/mpegvideo_neon.S
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@ -19,13 +19,7 @@
*/
#include "asm.S"
#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
#include "asm-offsets.h"
function ff_dct_unquantize_h263_inter_neon, export=1
add r0, r0, #0x2200