Add skeleton for DualCart16ParameterData.

This change introduces the `DualCart16ParameterData` class, which inherits from `ParameterData`. It includes skeleton implementations for `ReadAndValidate`, `Write`, and `Print` methods, all of which currently return `UnimplementedError`.

PiperOrigin-RevId: 844486193

Author: Googler

iamf/obu/BUILD

@@ -117,6 +117,19 @@ cc_library(
     ],
 )
 
+cc_library(
+    name = "dual_cart16_parameter_data",
+    srcs = ["dual_cart16_parameter_data.cc"],
+    hdrs = ["dual_cart16_parameter_data.h"],
+    deps = [
+        ":parameter_data",
+        "//iamf/common:read_bit_buffer",
+        "//iamf/common:write_bit_buffer",
+        "@abseil-cpp//absl/log:absl_log",
+        "@abseil-cpp//absl/status",
+    ],
+)
+
 cc_library(
     name = "dual_cart8_parameter_data",
     srcs = ["dual_cart8_parameter_data.cc"],

iamf/obu/dual_cart16_parameter_data.cc

@@ -0,0 +1,22 @@
+#include "iamf/obu/dual_cart16_parameter_data.h"
+
+#include "absl/log/absl_log.h"
+#include "absl/status/status.h"
+#include "iamf/common/read_bit_buffer.h"
+#include "iamf/common/write_bit_buffer.h"
+
+namespace iamf_tools {
+
+absl::Status DualCart16ParameterData::ReadAndValidate(ReadBitBuffer& rb) {
+  return absl::UnimplementedError("ReadAndValidate is not implemented yet.");
+}
+
+absl::Status DualCart16ParameterData::Write(WriteBitBuffer& wb) const {
+  return absl::UnimplementedError("Write is not implemented yet.");
+}
+
+void DualCart16ParameterData::Print() const {
+  ABSL_LOG(INFO) << "DualCart16ParameterData printing is not implemented yet:";
+}
+
+}  // namespace iamf_tools

iamf/obu/dual_cart16_parameter_data.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2025, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 3-Clause Clear License
+ * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
+ * License was not distributed with this source code in the LICENSE file, you
+ * can obtain it at www.aomedia.org/license/software-license/bsd-3-c-c. If the
+ * Alliance for Open Media Patent License 1.0 was not distributed with this
+ * source code in the PATENTS file, you can obtain it at
+ * www.aomedia.org/license/patent.
+ */
+#ifndef OBU_DUAL_CART16_PARAMETER_DATA_H_
+#define OBU_DUAL_CART16_PARAMETER_DATA_H_
+
+#include "absl/status/status.h"
+#include "iamf/common/read_bit_buffer.h"
+#include "iamf/common/write_bit_buffer.h"
+#include "iamf/obu/parameter_data.h"
+
+namespace iamf_tools {
+
+struct DualCart16ParameterData : public ParameterData {
+  DualCart16ParameterData() = default;
+
+  /*!\brief Overridden destructor.
+   */
+  ~DualCart16ParameterData() override = default;
+
+  bool friend operator==(const DualCart16ParameterData& lhs,
+                         const DualCart16ParameterData& rhs) = default;
+
+  /*!\brief Reads and validates a `DualCart16ParameterData` from a buffer.
+   *
+   * \param rb Buffer to read from.
+   * \return `absl::OkStatus()` if successful. A specific status on failure.
+   */
+  absl::Status ReadAndValidate(ReadBitBuffer& rb) override;
+
+  /*!\brief Validates and writes to a buffer.
+   *
+   * \param wb Buffer to write to.
+   * \return `absl::OkStatus()` if successful. A specific status on failure.
+   */
+  absl::Status Write(WriteBitBuffer& wb) const override;
+
+  /*!\brief Prints the DualCart16 parameter data.
+   */
+  void Print() const override;
+};
+}  // namespace iamf_tools
+
+#endif  // OBU_DUAL_CART16_PARAMETER_DATA_H_