1/*
2 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "pcm16b.h"
12
13#include "webrtc/typedefs.h"
14
15size_t WebRtcPcm16b_Encode(const int16_t* speech,
16                           size_t len,
17                           uint8_t* encoded) {
18  size_t i;
19  for (i = 0; i < len; ++i) {
20    uint16_t s = speech[i];
21    encoded[2 * i] = s >> 8;
22    encoded[2 * i + 1] = s;
23  }
24  return 2 * len;
25}
26
27size_t WebRtcPcm16b_Decode(const uint8_t* encoded,
28                           size_t len,
29                           int16_t* speech) {
30  size_t i;
31  for (i = 0; i < len / 2; ++i)
32    speech[i] = encoded[2 * i] << 8 | encoded[2 * i + 1];
33  return len / 2;
34}
35