1 files changed, 87 insertions, 0 deletions
diff --git a/system/embdrv/lc3/fuzzer/liblc3_fuzzer.cpp b/system/embdrv/lc3/fuzzer/liblc3_fuzzer.cpp
new file mode 100644
index 0000000000..a5a7ae7f29
--- /dev/null
+++ b/system/embdrv/lc3/fuzzer/liblc3_fuzzer.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2021 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 "include/lc3.h"
+
+void TestEncoder(FuzzedDataProvider& fdp) {
+  int dt_us = fdp.PickValueInArray({10000, 7500});
+  int sr_hz =
+      fdp.PickValueInArray({8000, 16000, 24000, 32000, /*44100,*/ 48000});
+  unsigned enc_size = lc3_encoder_size(dt_us, sr_hz);
+  uint16_t output_byte_count = fdp.ConsumeIntegralInRange(20, 400);
+  uint16_t num_frames = lc3_frame_samples(dt_us, sr_hz);
+
+  if (fdp.remaining_bytes() < num_frames * 2) {
+    return;
+  }
+
+  std::vector<uint16_t> input_frames(num_frames);
+  fdp.ConsumeData(input_frames.data(),
+                  input_frames.size() * 2 /* each frame is 2 bytes */);
+
+  void* lc3_encoder_mem = nullptr;
+  lc3_encoder_mem = malloc(enc_size);
+  lc3_encoder_t lc3_encoder =
+      lc3_setup_encoder(dt_us, sr_hz, 0, lc3_encoder_mem);
+
+  std::vector<uint8_t> output(output_byte_count);
+  lc3_encode(lc3_encoder, (const int16_t*)input_frames.data(), 1, output.size(),
+             output.data());
+
+  free(lc3_encoder_mem);
+  lc3_encoder_mem = nullptr;
+  return;
+}
+
+void TestDecoder(FuzzedDataProvider& fdp) {
+  int dt_us = fdp.PickValueInArray({10000, 7500});
+  int sr_hz =
+      fdp.PickValueInArray({8000, 16000, 24000, 32000, /*44100,*/ 48000});
+  unsigned dec_size = lc3_decoder_size(dt_us, sr_hz);
+  uint16_t input_byte_count = fdp.ConsumeIntegralInRange(20, 400);
+  uint16_t num_frames = lc3_frame_samples(dt_us, sr_hz);
+
+  if (fdp.remaining_bytes() < input_byte_count) {
+    return;
+  }
+
+  std::vector<uint8_t> input(input_byte_count);
+  fdp.ConsumeData(input.data(), input.size());
+
+  void* lc3_decoder_mem = nullptr;
+  lc3_decoder_mem = malloc(dec_size);
+  lc3_decoder_t lc3_decoder =
+      lc3_setup_decoder(dt_us, sr_hz, 0, lc3_decoder_mem);
+
+  std::vector<uint16_t> output(num_frames);
+  lc3_decode(lc3_decoder, input.data(), input.size(), (int16_t*)output.data(),
+             1);
+
+  /* Empty input performs PLC (packet loss concealment) */
+  lc3_decode(lc3_decoder, nullptr, 0, (int16_t*)output.data(), 1);
+
+  free(lc3_decoder_mem);
+  lc3_decoder_mem = nullptr;
+  return;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  FuzzedDataProvider fdp(data, size);
+  TestEncoder(fdp);
+  TestDecoder(fdp);
+  return 0;
+}
+\ No newline at end of file