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 
WebRtcPcm16b_Encode(const int16_t * speech,size_t len,uint8_t * encoded)15 size_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 
WebRtcPcm16b_Decode(const uint8_t * encoded,size_t len,int16_t * speech)27 size_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