iSAC fixed|float encoder fuzzers

Bug: webrtc:11388
Change-Id: I5910492ef9471aa193aa50ef5e14b4b66cb6542a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/169365
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30635}

test/fuzzers/audio_encoder_isax_float_fuzzer.cc

@@ -0,0 +1,27 @@
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "api/audio_codecs/isac/audio_encoder_isac_float.h"
+#include "rtc_base/checks.h"
+#include "test/fuzzers/audio_encoder_fuzzer.h"
+
+namespace webrtc {
+
+void FuzzOneInput(const uint8_t* data, size_t size) {
+  AudioEncoderIsacFloat::Config config;
+  config.sample_rate_hz = 16000;
+  RTC_CHECK(config.IsOk());
+  constexpr int kPayloadType = 100;
+  FuzzAudioEncoder(/*data_view=*/{data, size},
+                   /*encoder=*/AudioEncoderIsacFloat::MakeAudioEncoder(
+                       config, kPayloadType));
+}
+
+}  // namespace webrtc