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78 lines
2.8 KiB
78 lines
2.8 KiB
4 months ago
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/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "test/fuzzers/audio_decoder_fuzzer.h"
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#include <limits>
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#include "absl/types/optional.h"
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#include "api/audio_codecs/audio_decoder.h"
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#include "modules/rtp_rtcp/source/byte_io.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace {
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template <typename T, unsigned int B = sizeof(T)>
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bool ParseInt(const uint8_t** data, size_t* remaining_size, T* value) {
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static_assert(std::numeric_limits<T>::is_integer, "Type must be an integer.");
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static_assert(sizeof(T) <= sizeof(uint64_t),
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"Cannot read wider than uint64_t.");
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static_assert(B <= sizeof(T), "T must be at least B bytes wide.");
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if (B > *remaining_size)
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return false;
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uint64_t val = ByteReader<uint64_t, B>::ReadBigEndian(*data);
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*data += B;
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*remaining_size -= B;
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*value = static_cast<T>(val);
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return true;
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}
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} // namespace
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// This function reads two bytes from the beginning of |data|, interprets them
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// as the first packet length, and reads this many bytes if available. The
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// payload is inserted into the decoder, and the process continues until no more
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// data is available. Either AudioDecoder::Decode or
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// AudioDecoder::DecodeRedundant is used, depending on the value of
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// |decode_type|.
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void FuzzAudioDecoder(DecoderFunctionType decode_type,
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const uint8_t* data,
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size_t size,
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AudioDecoder* decoder,
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int sample_rate_hz,
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size_t max_decoded_bytes,
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int16_t* decoded) {
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const uint8_t* data_ptr = data;
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size_t remaining_size = size;
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size_t packet_len;
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constexpr size_t kMaxNumFuzzedPackets = 200;
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for (size_t num_packets = 0; num_packets < kMaxNumFuzzedPackets;
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++num_packets) {
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if (!(ParseInt<size_t, 2>(&data_ptr, &remaining_size, &packet_len) &&
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packet_len <= remaining_size)) {
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break;
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}
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AudioDecoder::SpeechType speech_type;
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switch (decode_type) {
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case DecoderFunctionType::kNormalDecode:
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decoder->Decode(data_ptr, packet_len, sample_rate_hz, max_decoded_bytes,
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decoded, &speech_type);
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break;
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case DecoderFunctionType::kRedundantDecode:
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decoder->DecodeRedundant(data_ptr, packet_len, sample_rate_hz,
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max_decoded_bytes, decoded, &speech_type);
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break;
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}
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data_ptr += packet_len;
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remaining_size -= packet_len;
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}
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}
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} // namespace webrtc
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