mirror of
https://github.com/FFmpeg/FFmpeg.git
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ca3c6c981a
Fixes: negation of -2147483648 cannot be represented in type 'int32_t' (aka 'int'); cast to an unsigned type to negate this value to itself Fixes: 23760/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-604209011412172 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
251 lines
13 KiB
C
251 lines
13 KiB
C
/*
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* Copyright (C) 2009 David Conrad
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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
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "diracdsp.h"
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#define FILTER(src, stride) \
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((21*((src)[ 0*stride] + (src)[1*stride]) \
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-7*((src)[-1*stride] + (src)[2*stride]) \
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+3*((src)[-2*stride] + (src)[3*stride]) \
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-1*((src)[-3*stride] + (src)[4*stride]) + 16) >> 5)
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static void dirac_hpel_filter(uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, const uint8_t *src,
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int stride, int width, int height)
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{
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int x, y;
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for (y = 0; y < height; y++) {
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for (x = -3; x < width+5; x++)
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dstv[x] = av_clip_uint8(FILTER(src+x, stride));
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for (x = 0; x < width; x++)
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dstc[x] = av_clip_uint8(FILTER(dstv+x, 1));
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for (x = 0; x < width; x++)
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dsth[x] = av_clip_uint8(FILTER(src+x, 1));
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src += stride;
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dsth += stride;
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dstv += stride;
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dstc += stride;
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}
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}
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#define PIXOP_BILINEAR(PFX, OP, WIDTH) \
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static void ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c(uint8_t *dst, const uint8_t *src[5], int stride, int h) \
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{ \
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int x; \
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const uint8_t *s0 = src[0]; \
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const uint8_t *s1 = src[1]; \
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const uint8_t *s2 = src[2]; \
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const uint8_t *s3 = src[3]; \
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const uint8_t *w = src[4]; \
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\
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while (h--) { \
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for (x = 0; x < WIDTH; x++) { \
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OP(dst[x], (s0[x]*w[0] + s1[x]*w[1] + s2[x]*w[2] + s3[x]*w[3] + 8) >> 4); \
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} \
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\
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dst += stride; \
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s0 += stride; \
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s1 += stride; \
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s2 += stride; \
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s3 += stride; \
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} \
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}
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#define OP_PUT(dst, val) (dst) = (val)
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#define OP_AVG(dst, val) (dst) = (((dst) + (val) + 1)>>1)
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PIXOP_BILINEAR(put, OP_PUT, 8)
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PIXOP_BILINEAR(put, OP_PUT, 16)
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PIXOP_BILINEAR(put, OP_PUT, 32)
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PIXOP_BILINEAR(avg, OP_AVG, 8)
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PIXOP_BILINEAR(avg, OP_AVG, 16)
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PIXOP_BILINEAR(avg, OP_AVG, 32)
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#define op_scale1(x) block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)
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#define op_scale2(x) dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)
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#define DIRAC_WEIGHT(W) \
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static void weight_dirac_pixels ## W ## _c(uint8_t *block, int stride, int log2_denom, \
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int weight, int h) { \
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int x; \
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while (h--) { \
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for (x = 0; x < W; x++) { \
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op_scale1(x); \
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op_scale1(x+1); \
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} \
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block += stride; \
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} \
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} \
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static void biweight_dirac_pixels ## W ## _c(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, \
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int weightd, int weights, int h) { \
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int x; \
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while (h--) { \
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for (x = 0; x < W; x++) { \
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op_scale2(x); \
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op_scale2(x+1); \
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} \
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dst += stride; \
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src += stride; \
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} \
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}
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DIRAC_WEIGHT(8)
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DIRAC_WEIGHT(16)
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DIRAC_WEIGHT(32)
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#define ADD_OBMC(xblen) \
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static void add_obmc ## xblen ## _c(uint16_t *dst, const uint8_t *src, int stride, \
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const uint8_t *obmc_weight, int yblen) \
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{ \
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int x; \
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while (yblen--) { \
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for (x = 0; x < xblen; x += 2) { \
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dst[x ] += src[x ] * obmc_weight[x ]; \
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dst[x+1] += src[x+1] * obmc_weight[x+1]; \
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} \
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dst += stride; \
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src += stride; \
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obmc_weight += 32; \
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} \
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}
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ADD_OBMC(8)
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ADD_OBMC(16)
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ADD_OBMC(32)
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static void put_signed_rect_clamped_8bit_c(uint8_t *dst, int dst_stride, const uint8_t *_src, int src_stride, int width, int height)
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{
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int x, y;
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int16_t *src = (int16_t *)_src;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x+=4) {
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dst[x ] = av_clip_uint8(src[x ] + 128);
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dst[x+1] = av_clip_uint8(src[x+1] + 128);
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dst[x+2] = av_clip_uint8(src[x+2] + 128);
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dst[x+3] = av_clip_uint8(src[x+3] + 128);
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}
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dst += dst_stride;
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src += src_stride >> 1;
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}
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}
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#define PUT_SIGNED_RECT_CLAMPED(PX) \
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static void put_signed_rect_clamped_ ## PX ## bit_c(uint8_t *_dst, int dst_stride, const uint8_t *_src, \
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int src_stride, int width, int height) \
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{ \
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int x, y; \
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uint16_t *dst = (uint16_t *)_dst; \
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int32_t *src = (int32_t *)_src; \
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for (y = 0; y < height; y++) { \
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for (x = 0; x < width; x+=4) { \
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dst[x ] = av_clip_uintp2(src[x ] + (1U << (PX - 1)), PX); \
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dst[x+1] = av_clip_uintp2(src[x+1] + (1U << (PX - 1)), PX); \
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dst[x+2] = av_clip_uintp2(src[x+2] + (1U << (PX - 1)), PX); \
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dst[x+3] = av_clip_uintp2(src[x+3] + (1U << (PX - 1)), PX); \
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} \
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dst += dst_stride >> 1; \
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src += src_stride >> 2; \
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} \
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}
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PUT_SIGNED_RECT_CLAMPED(10)
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PUT_SIGNED_RECT_CLAMPED(12)
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static void add_rect_clamped_c(uint8_t *dst, const uint16_t *src, int stride,
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const int16_t *idwt, int idwt_stride,
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int width, int height)
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{
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int x, y;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x+=2) {
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dst[x ] = av_clip_uint8(((src[x ]+32)>>6) + idwt[x ]);
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dst[x+1] = av_clip_uint8(((src[x+1]+32)>>6) + idwt[x+1]);
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}
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dst += stride;
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src += stride;
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idwt += idwt_stride;
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}
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}
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#define DEQUANT_SUBBAND(PX) \
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static void dequant_subband_ ## PX ## _c(uint8_t *src, uint8_t *dst, ptrdiff_t stride, \
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const int qf, const int qs, int tot_v, int tot_h) \
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{ \
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int i, y; \
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for (y = 0; y < tot_v; y++) { \
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PX c, sign, *src_r = (PX *)src, *dst_r = (PX *)dst; \
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for (i = 0; i < tot_h; i++) { \
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c = *src_r++; \
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if (c < 0) c = -((-(unsigned)c*qf + qs) >> 2); \
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else if(c > 0) c = (( (unsigned)c*qf + qs) >> 2); \
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*dst_r++ = c; \
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} \
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src += tot_h << (sizeof(PX) >> 1); \
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dst += stride; \
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} \
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}
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DEQUANT_SUBBAND(int16_t)
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DEQUANT_SUBBAND(int32_t)
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#define PIXFUNC(PFX, WIDTH) \
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c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _c; \
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c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l2_c; \
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c->PFX ## _dirac_pixels_tab[WIDTH>>4][2] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l4_c; \
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c->PFX ## _dirac_pixels_tab[WIDTH>>4][3] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c
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av_cold void ff_diracdsp_init(DiracDSPContext *c)
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{
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c->dirac_hpel_filter = dirac_hpel_filter;
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c->add_rect_clamped = add_rect_clamped_c;
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c->put_signed_rect_clamped[0] = put_signed_rect_clamped_8bit_c;
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c->put_signed_rect_clamped[1] = put_signed_rect_clamped_10bit_c;
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c->put_signed_rect_clamped[2] = put_signed_rect_clamped_12bit_c;
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c->add_dirac_obmc[0] = add_obmc8_c;
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c->add_dirac_obmc[1] = add_obmc16_c;
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c->add_dirac_obmc[2] = add_obmc32_c;
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c->weight_dirac_pixels_tab[0] = weight_dirac_pixels8_c;
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c->weight_dirac_pixels_tab[1] = weight_dirac_pixels16_c;
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c->weight_dirac_pixels_tab[2] = weight_dirac_pixels32_c;
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c->biweight_dirac_pixels_tab[0] = biweight_dirac_pixels8_c;
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c->biweight_dirac_pixels_tab[1] = biweight_dirac_pixels16_c;
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c->biweight_dirac_pixels_tab[2] = biweight_dirac_pixels32_c;
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c->dequant_subband[0] = c->dequant_subband[2] = dequant_subband_int16_t_c;
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c->dequant_subband[1] = c->dequant_subband[3] = dequant_subband_int32_t_c;
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PIXFUNC(put, 8);
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PIXFUNC(put, 16);
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PIXFUNC(put, 32);
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PIXFUNC(avg, 8);
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PIXFUNC(avg, 16);
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PIXFUNC(avg, 32);
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if (ARCH_X86)
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ff_diracdsp_init_x86(c);
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}
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