102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
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/*
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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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/*
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* Packet buffer for DTMF messages.
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*/
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#ifndef DTMF_BUFFER_H
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#define DTMF_BUFFER_H
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#include "typedefs.h"
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#include "neteq_defines.h"
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/* Include this code only if ATEVENT (DTMF) is defined in */
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#ifdef NETEQ_ATEVENT_DECODE
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#define MAX_DTMF_QUEUE_SIZE 4
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typedef struct dtmf_inst_t_
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{
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WebRtc_Word16 MaxPLCtime;
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WebRtc_Word16 CurrentPLCtime;
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WebRtc_Word16 EventQueue[MAX_DTMF_QUEUE_SIZE];
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WebRtc_Word16 EventQueueVolume[MAX_DTMF_QUEUE_SIZE];
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WebRtc_Word16 EventQueueEnded[MAX_DTMF_QUEUE_SIZE];
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WebRtc_UWord32 EventQueueStartTime[MAX_DTMF_QUEUE_SIZE];
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WebRtc_UWord32 EventQueueEndTime[MAX_DTMF_QUEUE_SIZE];
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WebRtc_Word16 EventBufferSize;
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WebRtc_Word16 framelen;
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} dtmf_inst_t;
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/****************************************************************************
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* WebRtcNetEQ_DtmfDecoderInit(...)
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*
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* This function initializes a DTMF instance.
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*
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* Input:
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* - DTMF_decinst_t : DTMF instance
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* - fs : The sample rate used for the DTMF
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* - MaxPLCtime : Maximum length for a PLC before zeros should be inserted
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcNetEQ_DtmfDecoderInit(dtmf_inst_t *DTMFdec_inst, WebRtc_UWord16 fs,
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WebRtc_Word16 MaxPLCtime);
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/****************************************************************************
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* WebRtcNetEQ_DtmfInsertEvent(...)
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*
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* This function decodes a packet with DTMF frames.
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*
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* Input:
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* - DTMFdec_inst : DTMF instance
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* - encoded : Encoded DTMF frame(s)
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* - len : Bytes in encoded vector
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*
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcNetEQ_DtmfInsertEvent(dtmf_inst_t *DTMFdec_inst,
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const WebRtc_Word16 *encoded, WebRtc_Word16 len,
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WebRtc_UWord32 timeStamp);
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/****************************************************************************
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* WebRtcNetEQ_DtmfDecode(...)
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*
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* This function decodes a packet with DTMF frame(s). Output will be the
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* event that should be played for next 10 ms.
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*
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* Input:
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* - DTMFdec_inst : DTMF instance
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* - currTimeStamp : The current playout timestamp
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*
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* Output:
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* - event : Event number to be played
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* - volume : Event volume to be played
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*
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* Return value : >0 - There is a event to be played
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* 0 - No event to be played
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* -1 - Error
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*/
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WebRtc_Word16 WebRtcNetEQ_DtmfDecode(dtmf_inst_t *DTMFdec_inst, WebRtc_Word16 *event,
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WebRtc_Word16 *volume, WebRtc_UWord32 currTimeStamp);
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#endif /* NETEQ_ATEVENT_DECODE */
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#endif /* DTMF_BUFFER_H */
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