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tools: Add target_sws_fuzzer.c
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
parent
64098d0cd8
commit
8caa84cec7
3
Makefile
3
Makefile
@ -64,6 +64,9 @@ tools/target_dem_fuzzer$(EXESUF): tools/target_dem_fuzzer.o $(FF_DEP_LIBS)
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tools/target_io_dem_fuzzer$(EXESUF): tools/target_io_dem_fuzzer.o $(FF_DEP_LIBS)
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$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
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tools/target_sws_fuzzer$(EXESUF): tools/target_sws_fuzzer.o $(FF_DEP_LIBS)
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$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
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tools/enum_options$(EXESUF): ELIBS = $(FF_EXTRALIBS)
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tools/enum_options$(EXESUF): $(FF_DEP_LIBS)
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@ -17,6 +17,9 @@ tools/target_dem_fuzzer.o: tools/target_dem_fuzzer.c
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tools/target_io_dem_fuzzer.o: tools/target_dem_fuzzer.c
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$(COMPILE_C) -DIO_FLAT=0
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tools/target_sws_fuzzer.o: tools/target_sws_fuzzer.c
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$(COMPILE_C)
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tools/enc_recon_frame_test$(EXESUF): tools/decode_simple.o
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tools/venc_data_dump$(EXESUF): tools/decode_simple.o
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tools/scale_slice_test$(EXESUF): tools/decode_simple.o
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202
tools/target_sws_fuzzer.c
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202
tools/target_sws_fuzzer.c
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@ -0,0 +1,202 @@
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/*
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* Copyright (c) 2024 Michael Niedermayer <michael-ffmpeg@niedermayer.cc>
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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 "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/cpu.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavcodec/bytestream.h"
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#include "libswscale/swscale.h"
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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static void error(const char *err)
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{
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fprintf(stderr, "%s", err);
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exit(1);
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}
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static int alloc_plane(uint8_t *data[AV_VIDEO_MAX_PLANES], int stride[AV_VIDEO_MAX_PLANES], int w, int h, int format, int *hshift, int *vshift)
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{
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size_t size[AV_VIDEO_MAX_PLANES];
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ptrdiff_t ptrdiff_stride[AV_VIDEO_MAX_PLANES];
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int ret = av_image_fill_linesizes(stride, format, w);
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if (ret < 0)
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return -1;
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av_assert0(AV_VIDEO_MAX_PLANES == 4); // Some of the libavutil API has 4 hardcoded so this has undefined behaviour if its not 4
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av_pix_fmt_get_chroma_sub_sample(format, hshift, vshift);
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for(int p=0; p<AV_VIDEO_MAX_PLANES; p++) {
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stride[p] =
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ptrdiff_stride[p] = FFALIGN(stride[p], 32);
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}
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ret = av_image_fill_plane_sizes(size, format, h, ptrdiff_stride);
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if (ret < 0)
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return ret;
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for(int p=0; p<AV_VIDEO_MAX_PLANES; p++) {
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if (size[p]) {
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data[p] = av_mallocz(size[p] + 32);
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if (!data[p])
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return -1;
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} else
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data[p] = NULL;
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}
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return 0;
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}
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static void free_plane(uint8_t *data[AV_VIDEO_MAX_PLANES])
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{
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for(int p=0; p<AV_VIDEO_MAX_PLANES; p++)
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av_freep(&data[p]);
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}
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static void mapres(unsigned *r0, unsigned *r1) {
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double d = (double)(*r0*10ll - 9ll*UINT32_MAX) / UINT32_MAX;
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double a = exp(d) * 16384 / exp(1) ;
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int ai = (int)round(a);
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uint64_t maxb = 16384 / ai;
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*r0 = ai;
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*r1 = 1 + (*r1 * maxb) / UINT32_MAX;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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int srcW= 48, srcH = 48;
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int dstW= 48, dstH = 48;
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int srcHShift, srcVShift;
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int dstHShift, dstVShift;
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unsigned flags = 1;
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int srcStride[AV_VIDEO_MAX_PLANES] = {0};
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int dstStride[AV_VIDEO_MAX_PLANES] = {0};
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int ret;
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const uint8_t *end = data + size;
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enum AVPixelFormat srcFormat = AV_PIX_FMT_YUV420P;
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enum AVPixelFormat dstFormat = AV_PIX_FMT_YUV420P;
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uint8_t *src[AV_VIDEO_MAX_PLANES] = { 0 };
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uint8_t *dst[AV_VIDEO_MAX_PLANES] = { 0 };
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struct SwsContext *sws = NULL;
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const AVPixFmtDescriptor *desc_src, *desc_dst;
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if (size > 128) {
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GetByteContext gbc;
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int64_t flags64;
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size -= 128;
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bytestream2_init(&gbc, data + size, 128);
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srcW = bytestream2_get_le32(&gbc);
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srcH = bytestream2_get_le32(&gbc);
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dstW = bytestream2_get_le32(&gbc);
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dstH = bytestream2_get_le32(&gbc);
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mapres(&srcW, &srcH);
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mapres(&dstW, &dstH);
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flags = bytestream2_get_le32(&gbc);
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unsigned mask = flags & (SWS_POINT |
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SWS_AREA |
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SWS_BILINEAR |
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SWS_FAST_BILINEAR |
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SWS_BICUBIC |
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SWS_X |
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SWS_GAUSS |
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SWS_LANCZOS |
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SWS_SINC |
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SWS_SPLINE |
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SWS_BICUBLIN);
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mask &= flags;
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if (mask && (mask & (mask -1)))
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return 0; // multiple scalers are set, not possible
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srcFormat = bytestream2_get_le32(&gbc) % AV_PIX_FMT_NB;
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dstFormat = bytestream2_get_le32(&gbc) % AV_PIX_FMT_NB;
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flags64 = bytestream2_get_le64(&gbc);
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if (flags64 & 0x10)
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av_force_cpu_flags(0);
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if (av_image_check_size(srcW, srcH, srcFormat, NULL) < 0)
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srcW = srcH = 23;
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if (av_image_check_size(dstW, dstH, dstFormat, NULL) < 0)
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dstW = dstH = 23;
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//TODO alphablend
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}
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desc_src = av_pix_fmt_desc_get(srcFormat);
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desc_dst = av_pix_fmt_desc_get(dstFormat);
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fprintf(stderr, "%d x %d %s -> %d x %d %s\n", srcW, srcH, desc_src->name, dstW, dstH, desc_dst->name);
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ret = alloc_plane(src, srcStride, srcW, srcH, srcFormat, &srcHShift, &srcVShift);
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if (ret < 0)
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goto end;
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ret = alloc_plane(dst, dstStride, dstW, dstH, dstFormat, &dstHShift, &dstVShift);
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if (ret < 0)
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goto end;
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for(int p=0; p<AV_VIDEO_MAX_PLANES; p++) {
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int psize = srcStride[p] * AV_CEIL_RSHIFT(srcH, (p == 1 || p == 2) ? srcVShift : 0);
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if (psize > size)
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psize = size;
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if (psize) {
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memcpy(src[p], data, psize);
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data += psize;
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size -= psize;
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}
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}
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sws = sws_alloc_context();
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if (!sws)
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error("Failed sws allocation");
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av_opt_set_int(sws, "sws_flags", flags, 0);
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av_opt_set_int(sws, "srcw", srcW, 0);
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av_opt_set_int(sws, "srch", srcH, 0);
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av_opt_set_int(sws, "dstw", dstW, 0);
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av_opt_set_int(sws, "dsth", dstH, 0);
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av_opt_set_int(sws, "src_format", srcFormat, 0);
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av_opt_set_int(sws, "dst_format", dstFormat, 0);
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av_opt_set(sws, "alphablend", "none", 0);
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ret = sws_init_context(sws, NULL, NULL);
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if (ret < 0)
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goto end;
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//TODO Slices
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sws_scale(sws, (const uint8_t * const*)src, srcStride, 0, srcH, dst, dstStride);
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end:
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sws_freeContext(sws);
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free_plane(src);
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free_plane(dst);
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return 0;
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}
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