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ssd_int8_vs_int16 is only called from encode_block() in svq1enc.c; it calls it in stages: At stage 0, the int16_t array contains the difference of two uint16_t. At each of the following stages, the int16_t array is filled by subtracting an int8_t from the current stage's int16_t array. The maximum stage is five, so the int16_t are in the range (-255 - 5 * 127)..(255 + 5 * 128). This commit modifies the checkasm test to only use values from this range, fixing (undefined) integer overflow in the test. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* Copyright (c) 2023 Institue of Software Chinese Academy of Sciences (ISCAS).
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "libavutil/mem_internal.h"
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#include "libavcodec/svq1encdsp.h"
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#include "checkasm.h"
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#define BUF_SIZE 1024
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#define MIN_VAL (-255 - 5 * 127)
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#define MAX_VAL ( 255 + 5 * 128)
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#define randomize(buf, len) \
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do { \
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for (int i = 0; i < len; i++) \
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buf[i] = ((rnd() % (MAX_VAL - MIN_VAL + 1)) + MIN_VAL); \
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} while (0)
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static void test_ssd_int8_vs_int16(SVQ1EncDSPContext *s) {
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declare_func(int, const int8_t *pix1, const int16_t *pix2, intptr_t size);
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int r1, r2;
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if (check_func(s->ssd_int8_vs_int16, "ssd_int8_vs_int16")) {
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LOCAL_ALIGNED_4(int8_t, p1, [BUF_SIZE]);
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LOCAL_ALIGNED_16(int16_t, p2, [BUF_SIZE]);
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randomize(p1, BUF_SIZE);
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randomize(p2, BUF_SIZE);
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r1 = call_ref(p1, p2, BUF_SIZE);
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r2 = call_new(p1, p2, BUF_SIZE);
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if (r1 != r2) {
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fail();
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}
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bench_new(p1, p2, BUF_SIZE);
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}
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report("ssd_int8_vs_int16");
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}
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void checkasm_check_svq1enc(void)
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{
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SVQ1EncDSPContext s = { 0 };
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ff_svq1enc_init(&s);
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test_ssd_int8_vs_int16(&s);
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}
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