pcm16b.h (1924B)
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 #ifndef MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ 12 #define MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ 13 /* 14 * Define the fixpoint numeric formats 15 */ 16 17 #include <stddef.h> 18 #include <stdint.h> 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 /**************************************************************************** 25 * WebRtcPcm16b_Encode(...) 26 * 27 * "Encode" a sample vector to 16 bit linear (Encoded standard is big endian) 28 * 29 * Input: 30 * - speech : Input speech vector 31 * - len : Number of samples in speech vector 32 * 33 * Output: 34 * - encoded : Encoded data vector (big endian 16 bit) 35 * 36 * Returned value : Length (in bytes) of coded data. 37 * Always equal to twice the len input parameter. 38 */ 39 40 size_t WebRtcPcm16b_Encode(const int16_t* speech, size_t len, uint8_t* encoded); 41 42 /**************************************************************************** 43 * WebRtcPcm16b_Decode(...) 44 * 45 * "Decode" a vector to 16 bit linear (Encoded standard is big endian) 46 * 47 * Input: 48 * - encoded : Encoded data vector (big endian 16 bit) 49 * - len : Number of bytes in encoded 50 * 51 * Output: 52 * - speech : Decoded speech vector 53 * 54 * Returned value : Samples in speech 55 */ 56 57 size_t WebRtcPcm16b_Decode(const uint8_t* encoded, size_t len, int16_t* speech); 58 59 #ifdef __cplusplus 60 } 61 #endif 62 63 #endif /* MODULES_AUDIO_CODING_CODECS_PCM16B_PCM16B_H_ */