1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
media / gpu / vp8_decoder_fuzzer.cc [blame]
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "media/gpu/vp8_decoder.h"
#include <stddef.h>
#include "base/numerics/safe_conversions.h"
#include "media/base/decoder_buffer.h"
#include "media/base/test_data_util.h"
#include "media/base/video_codecs.h"
#include "media/base/video_types.h"
#include "media/gpu/vp8_picture.h"
namespace {
class FakeVP8Accelerator : public media::VP8Decoder::VP8Accelerator {
public:
FakeVP8Accelerator() = default;
FakeVP8Accelerator(const FakeVP8Accelerator&) = delete;
FakeVP8Accelerator& operator=(const FakeVP8Accelerator&) = delete;
~FakeVP8Accelerator() override = default;
// media::VP8Decoder::VP8Accelerator
scoped_refptr<media::VP8Picture> CreateVP8Picture() override {
return new media::VP8Picture();
}
bool SubmitDecode(
scoped_refptr<media::VP8Picture> pic,
const media::Vp8ReferenceFrameVector& reference_frames) override {
return true;
}
bool OutputPicture(scoped_refptr<media::VP8Picture> pic) override {
return true;
}
};
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
if (!size) {
return 0;
}
media::VP8Decoder decoder(std::make_unique<FakeVP8Accelerator>());
auto external_memory =
std::make_unique<media::ExternalMemoryAdapterForTesting>(
base::span(data, size));
scoped_refptr<media::DecoderBuffer> decoder_buffer =
media::DecoderBuffer::FromExternalMemory(std::move(external_memory));
decoder.SetStream(1, *decoder_buffer);
size_t retry_count = 0;
while (true) {
switch (decoder.Decode()) {
case media::AcceleratedVideoDecoder::DecodeResult::kConfigChange:
break;
case media::AcceleratedVideoDecoder::DecodeResult::kTryAgain:
if (++retry_count > 3) {
return 0;
}
break;
default:
return 0;
}
}
}