Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/webrtc/modules/audio_coding/main/acm2/acm_pcm16b.h

@@ -0,0 +1,49 @@
+/*
+ *  Copyright (c) 2012 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.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_PCM16B_H_
+#define WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_PCM16B_H_
+
+#include "webrtc/modules/audio_coding/main/acm2/acm_generic_codec.h"
+
+namespace webrtc {
+
+namespace acm2 {
+
+class ACMPCM16B : public ACMGenericCodec {
+ public:
+  explicit ACMPCM16B(int16_t codec_id);
+  ~ACMPCM16B();
+
+  // For FEC.
+  ACMGenericCodec* CreateInstance(void);
+
+  int16_t InternalEncode(uint8_t* bitstream,
+                         int16_t* bitstream_len_byte) OVERRIDE
+      EXCLUSIVE_LOCKS_REQUIRED(codec_wrapper_lock_);
+
+  int16_t InternalInitEncoder(WebRtcACMCodecParams* codec_params);
+
+ protected:
+  void DestructEncoderSafe() OVERRIDE
+      EXCLUSIVE_LOCKS_REQUIRED(codec_wrapper_lock_);
+
+  int16_t InternalCreateEncoder();
+
+  void InternalDestructEncoderInst(void* ptr_inst);
+
+  int32_t sampling_freq_hz_;
+};
+
+}  // namespace acm2
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_PCM16B_H_