pcm16b.c (1016B)
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 "modules/audio_coding/codecs/pcm16b/pcm16b.h" 12 13 size_t WebRtcPcm16b_Encode(const int16_t* speech, 14 size_t len, 15 uint8_t* encoded) { 16 size_t i; 17 for (i = 0; i < len; ++i) { 18 uint16_t s = speech[i]; 19 encoded[2 * i] = s >> 8; 20 encoded[2 * i + 1] = s; 21 } 22 return 2 * len; 23 } 24 25 size_t WebRtcPcm16b_Decode(const uint8_t* encoded, 26 size_t len, 27 int16_t* speech) { 28 size_t i; 29 for (i = 0; i < len / 2; ++i) 30 speech[i] = encoded[2 * i] << 8 | encoded[2 * i + 1]; 31 return len / 2; 32 }