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// 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/h264_decoder.h"
#include <stddef.h>
#include "base/memory/scoped_refptr.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/h264_dpb.h"
namespace {
class FakeH264Accelerator : public media::H264Decoder::H264Accelerator {
public:
FakeH264Accelerator() = default;
FakeH264Accelerator(const FakeH264Accelerator&) = delete;
FakeH264Accelerator& operator=(const FakeH264Accelerator&) = delete;
~FakeH264Accelerator() override = default;
// media::H264Decoder::H264Accelerator
scoped_refptr<media::H264Picture> CreateH264Picture() override {
return base::MakeRefCounted<media::H264Picture>();
}
Status SubmitFrameMetadata(const media::H264SPS* sps,
const media::H264PPS* pps,
const media::H264DPB& dpb,
const media::H264Picture::Vector& ref_pic_listp0,
const media::H264Picture::Vector& ref_pic_listb0,
const media::H264Picture::Vector& ref_pic_listb1,
scoped_refptr<media::H264Picture> pic) override {
return Status::kOk;
}
Status SubmitSlice(
const media::H264PPS* pps,
const media::H264SliceHeader* slice_hdr,
const media::H264Picture::Vector& ref_pic_list0,
const media::H264Picture::Vector& ref_pic_list1,
scoped_refptr<media::H264Picture> pic,
const uint8_t* data,
size_t size,
const std::vector<media::SubsampleEntry>& subsamples) override {
return Status::kOk;
}
Status SubmitDecode(scoped_refptr<media::H264Picture> pic) override {
return Status::kOk;
}
bool OutputPicture(scoped_refptr<media::H264Picture> pic) override {
return true;
}
void Reset() override {}
Status SetStream(base::span<const uint8_t> stream,
const media::DecryptConfig* decrypt_config) override {
return Status::kOk;
}
};
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
if (!size) {
return 0;
}
media::H264Decoder decoder(std::make_unique<FakeH264Accelerator>(),
media::H264PROFILE_MAIN);
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;
}
}
}
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