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 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 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
