149 lines
5.0 KiB
C
149 lines
5.0 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_CODING_CODECS_G711_MAIN_INTERFACE_G711_INTERFACE_H_
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#define MODULES_AUDIO_CODING_CODECS_G711_MAIN_INTERFACE_G711_INTERFACE_H_
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#include "typedefs.h"
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// Comfort noise constants
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#define G711_WEBRTC_SPEECH 1
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#define G711_WEBRTC_CNG 2
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#ifdef __cplusplus
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extern "C" {
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#endif
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/****************************************************************************
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* WebRtcG711_EncodeA(...)
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*
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* This function encodes a G711 A-law frame and inserts it into a packet.
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* Input speech length has be of any length.
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*
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* Input:
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* - state : Dummy state to make this codec look more like
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* other codecs
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* - speechIn : Input speech vector
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* - len : Samples in speechIn
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*
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* Output:
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* - encoded : The encoded data vector
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*
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* Return value : >0 - Length (in bytes) of coded data
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcG711_EncodeA(void *state,
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WebRtc_Word16 *speechIn,
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WebRtc_Word16 len,
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WebRtc_Word16 *encoded);
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/****************************************************************************
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* WebRtcG711_EncodeU(...)
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*
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* This function encodes a G711 U-law frame and inserts it into a packet.
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* Input speech length has be of any length.
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*
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* Input:
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* - state : Dummy state to make this codec look more like
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* other codecs
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* - speechIn : Input speech vector
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* - len : Samples in speechIn
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*
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* Output:
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* - encoded : The encoded data vector
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*
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* Return value : >0 - Length (in bytes) of coded data
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcG711_EncodeU(void *state,
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WebRtc_Word16 *speechIn,
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WebRtc_Word16 len,
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WebRtc_Word16 *encoded);
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/****************************************************************************
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* WebRtcG711_DecodeA(...)
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*
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* This function decodes a packet G711 A-law frame.
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*
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* Input:
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* - state : Dummy state to make this codec look more like
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* other codecs
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* - encoded : Encoded data
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* - len : Bytes in encoded vector
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*
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* Output:
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* - decoded : The decoded vector
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* - speechType : 1 normal, 2 CNG (for G711 it should
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* always return 1 since G711 does not have a
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* built-in DTX/CNG scheme)
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*
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* Return value : >0 - Samples in decoded vector
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcG711_DecodeA(void *state,
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WebRtc_Word16 *encoded,
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WebRtc_Word16 len,
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WebRtc_Word16 *decoded,
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WebRtc_Word16 *speechType);
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/****************************************************************************
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* WebRtcG711_DecodeU(...)
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*
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* This function decodes a packet G711 U-law frame.
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*
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* Input:
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* - state : Dummy state to make this codec look more like
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* other codecs
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* - encoded : Encoded data
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* - len : Bytes in encoded vector
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*
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* Output:
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* - decoded : The decoded vector
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* - speechType : 1 normal, 2 CNG (for G711 it should
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* always return 1 since G711 does not have a
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* built-in DTX/CNG scheme)
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*
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* Return value : >0 - Samples in decoded vector
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcG711_DecodeU(void *state,
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WebRtc_Word16 *encoded,
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WebRtc_Word16 len,
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WebRtc_Word16 *decoded,
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WebRtc_Word16 *speechType);
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/**********************************************************************
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* WebRtcG711_Version(...)
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*
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* This function gives the version string of the G.711 codec.
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*
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* Input:
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* - lenBytes: the size of Allocated space (in Bytes) where
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* the version number is written to (in string format).
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*
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* Output:
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* - version: Pointer to a buffer where the version number is
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* written to.
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*
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*/
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WebRtc_Word16 WebRtcG711_Version(char* version, WebRtc_Word16 lenBytes);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MODULES_AUDIO_CODING_CODECS_G711_MAIN_INTERFACE_G711_INTERFACE_H_ */
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