--- /dev/null
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <fuzzer/FuzzedDataProvider.h>
+
+#include "../g722_enc_dec.h"
+
+uint32_t get_rate_from_fdp(FuzzedDataProvider* fdp) {
+ uint32_t rate = fdp->ConsumeIntegralInRange<uint32_t>(
+ 0, 3); // Currently 3 different bit rates are available in G.722 codec
+ switch (rate) {
+ case 0:
+ return 48000;
+ case 1:
+ return 56000;
+ default:
+ return 64000;
+ }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+ FuzzedDataProvider fdp(data, size);
+
+ std::vector<uint8_t> buff;
+ for (size_t i = 0; i < size; i++) {
+ buff.push_back(data[i]);
+ }
+
+ int num_samples =
+ buff.size() / (2 /*bytes_per_sample*/ * 2 /*number of channels*/);
+
+ // The G.722 codec accept only even number of samples for encoding
+ if (num_samples % 2 != 0) {
+ num_samples--;
+ }
+
+ // Making channel data from buffer
+ std::vector<uint16_t> channel_data;
+
+ for (int i = 0; i < num_samples; i++) {
+ const uint8_t* sample = buff.data() + i * 2;
+ int16_t left = (int16_t)((*(sample + 1) << 8) + *sample) >> 1;
+
+ sample += 2;
+ int16_t right = (int16_t)((*(sample + 1) << 8) + *sample) >> 1;
+
+ uint16_t mono_data = (int16_t)(((uint32_t)left + (uint32_t)right) >> 1);
+ channel_data.push_back(mono_data);
+ }
+
+ uint32_t rate = get_rate_from_fdp(&fdp);
+
+ // Encoder Initialization
+ g722_encode_state_t* encoder_state = nullptr;
+ encoder_state = g722_encode_init(nullptr, rate, G722_PACKED);
+
+ // Encode
+ std::vector<uint8_t> encoded_data;
+ // Magic number is used in api, It should basically fit the number generated
+ // by this formula : num_channels * sample_rate * data_interval_ms
+ // * (bit_rate / 8)) / 1000 as mentioned in hearing_aid.cc And if we fit all
+ // the values in the above formula, the max value we can get is 1920. And I
+ // used "size" of the input that libfuzzer generates as the initial
+ // parameter to resize
+ encoded_data.resize(size);
+ int encoded_size =
+ g722_encode(encoder_state, encoded_data.data(),
+ (const int16_t*)channel_data.data(), channel_data.size());
+ encoded_data.resize(encoded_size);
+
+ // Encoder release
+ if (encoder_state != nullptr) {
+ g722_encode_release(encoder_state);
+ encoder_state = nullptr;
+ }
+
+ return 0;
+}
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