Move Codec2-related code from hardware/google/av

Test: None
Bug: 112362730
Change-Id: Ie2f8ff431d65c40333f267ab9877d47089adeea4
diff --git a/media/codec2/components/gsm/C2SoftGsmDec.h b/media/codec2/components/gsm/C2SoftGsmDec.h
new file mode 100644
index 0000000..2b209fe
--- /dev/null
+++ b/media/codec2/components/gsm/C2SoftGsmDec.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+#ifndef ANDROID_C2_SOFT_GSM_DEC_H_
+#define ANDROID_C2_SOFT_GSM_DEC_H_
+
+#include <SimpleC2Component.h>
+
+
+extern "C" {
+    #include "gsm.h"
+}
+
+namespace android {
+
+#define FRGSM_IN_FRM_SZ             33
+#define FRGSM_IN_FRM_SZ_MINUS_1     32
+#define FRGSM_OUT_FRM_SZ            160
+#define MSGSM_IN_FRM_SZ             (FRGSM_IN_FRM_SZ + FRGSM_IN_FRM_SZ_MINUS_1)
+#define MSGSM_OUT_FRM_SZ            (FRGSM_OUT_FRM_SZ * 2)
+
+struct C2SoftGsmDec : public SimpleC2Component {
+    class IntfImpl;
+
+    C2SoftGsmDec(const char *name, c2_node_id_t id,
+              const std::shared_ptr<IntfImpl> &intfImpl);
+    virtual ~C2SoftGsmDec();
+
+    // From SimpleC2Component
+    c2_status_t onInit() override;
+    c2_status_t onStop() override;
+    void onReset() override;
+    void onRelease() override;
+    c2_status_t onFlush_sm() override;
+    void process(
+            const std::unique_ptr<C2Work> &work,
+            const std::shared_ptr<C2BlockPool> &pool) override;
+    c2_status_t drain(
+            uint32_t drainMode,
+            const std::shared_ptr<C2BlockPool> &pool) override;
+ private:
+    std::shared_ptr<IntfImpl> mIntf;
+    gsm mGsm;
+    bool mSignalledError;
+    bool mSignalledEos;
+
+    C2_DO_NOT_COPY(C2SoftGsmDec);
+};
+
+}  // namespace android
+
+#endif  // ANDROID_C2_SOFT_GSM_DEC_H_