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FFmpeg/tools/target_bsf_fuzzer.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

167 lines
5.8 KiB
C

/*
* 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
*/
#include "config.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/bsf.h"
#include "libavcodec/bsf_internal.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/internal.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
static void error(const char *err)
{
fprintf(stderr, "%s", err);
exit(1);
}
static const AVBitStreamFilter *f = NULL;
static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
const uint64_t fuzz_tag = FUZZ_TAG;
const uint8_t *last = data;
const uint8_t *end = data + size;
AVBSFContext *bsf = NULL;
AVPacket *pkt;
uint64_t keyframes = 0;
uint64_t flushpattern = -1;
int res;
if (!f) {
#ifdef FFMPEG_BSF
#define BSF_SYMBOL0(BSF) ff_##BSF##_bsf
#define BSF_SYMBOL(BSF) BSF_SYMBOL0(BSF)
extern const AVBitStreamFilter BSF_SYMBOL(FFMPEG_BSF);
f = &BSF_SYMBOL(FFMPEG_BSF);
#endif
av_log_set_level(AV_LOG_PANIC);
}
res = f ? av_bsf_alloc(f, &bsf) : av_bsf_get_null_filter(&bsf);
if (res < 0)
error("Failed memory allocation");
f = bsf->filter;
if (size > 1024) {
GetByteContext gbc;
int extradata_size;
int flags;
size -= 1024;
bytestream2_init(&gbc, data + size, 1024);
bsf->par_in->width = bytestream2_get_le32(&gbc);
bsf->par_in->height = bytestream2_get_le32(&gbc);
bsf->par_in->bit_rate = bytestream2_get_le64(&gbc);
bsf->par_in->bits_per_coded_sample = bytestream2_get_le32(&gbc);
if (f->codec_ids) {
int i, id;
for (i = 0; f->codec_ids[i] != AV_CODEC_ID_NONE; i++);
id = f->codec_ids[bytestream2_get_byte(&gbc) % i];
bsf->par_in->codec_id = id;
bsf->par_in->codec_tag = bytestream2_get_le32(&gbc);
}
extradata_size = bytestream2_get_le32(&gbc);
bsf->par_in->sample_rate = bytestream2_get_le32(&gbc);
bsf->par_in->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
bsf->par_in->block_align = bytestream2_get_le32(&gbc);
keyframes = bytestream2_get_le64(&gbc);
flushpattern = bytestream2_get_le64(&gbc);
flags = bytestream2_get_byte(&gbc);
if (flags & 0x20) {
if (!strcmp(f->name, "av1_metadata"))
av_opt_set_int(bsf->priv_data, "td", bytestream2_get_byte(&gbc) % 3, 0);
else if (!strcmp(f->name, "h264_metadata") || !strcmp(f->name, "hevc_metadata") ||
!strcmp(f->name, "vvc_metadata"))
av_opt_set_int(bsf->priv_data, "aud", bytestream2_get_byte(&gbc) % 3, 0);
else if (!strcmp(f->name, "extract_extradata"))
av_opt_set_int(bsf->priv_data, "remove", bytestream2_get_byte(&gbc) & 1, 0);
}
if (extradata_size < size) {
bsf->par_in->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (bsf->par_in->extradata) {
bsf->par_in->extradata_size = extradata_size;
size -= bsf->par_in->extradata_size;
memcpy(bsf->par_in->extradata, data + size, bsf->par_in->extradata_size);
}
}
if (av_image_check_size(bsf->par_in->width, bsf->par_in->height, 0, bsf))
bsf->par_in->width = bsf->par_in->height = 0;
}
res = av_bsf_init(bsf);
if (res < 0) {
av_bsf_free(&bsf);
return 0; // Failure of av_bsf_init() does not imply that a issue was found
}
pkt = av_packet_alloc();
if (!pkt)
error("Failed memory allocation");
while (data < end) {
// Search for the TAG
while (data + sizeof(fuzz_tag) < end) {
if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
break;
data++;
}
if (data + sizeof(fuzz_tag) > end)
data = end;
res = av_new_packet(pkt, data - last);
if (res < 0)
error("Failed memory allocation");
memcpy(pkt->data, last, data - last);
pkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
keyframes = (keyframes >> 2) + (keyframes<<62);
data += sizeof(fuzz_tag);
last = data;
if (!(flushpattern & 7))
av_bsf_flush(bsf);
flushpattern = (flushpattern >> 3) + (flushpattern << 61);
res = av_bsf_send_packet(bsf, pkt);
if (res < 0) {
av_packet_unref(pkt);
continue;
}
while (av_bsf_receive_packet(bsf, pkt) >= 0)
av_packet_unref(pkt);
}
av_bsf_send_packet(bsf, NULL);
while (av_bsf_receive_packet(bsf, pkt) >= 0)
av_packet_unref(pkt);
av_packet_free(&pkt);
av_bsf_free(&bsf);
return 0;
}