| niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 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 | /* |
| 12 | * Packet buffer for DTMF messages. |
| 13 | */ |
| 14 | |
| 15 | #ifndef DTMF_BUFFER_H |
| 16 | #define DTMF_BUFFER_H |
| 17 | |
| 18 | #include "typedefs.h" |
| 19 | |
| 20 | #include "neteq_defines.h" |
| 21 | |
| 22 | /* Include this code only if ATEVENT (DTMF) is defined in */ |
| 23 | #ifdef NETEQ_ATEVENT_DECODE |
| 24 | |
| 25 | #define MAX_DTMF_QUEUE_SIZE 4 |
| 26 | |
| 27 | typedef struct dtmf_inst_t_ |
| 28 | { |
| 29 | WebRtc_Word16 MaxPLCtime; |
| 30 | WebRtc_Word16 CurrentPLCtime; |
| 31 | WebRtc_Word16 EventQueue[MAX_DTMF_QUEUE_SIZE]; |
| 32 | WebRtc_Word16 EventQueueVolume[MAX_DTMF_QUEUE_SIZE]; |
| 33 | WebRtc_Word16 EventQueueEnded[MAX_DTMF_QUEUE_SIZE]; |
| 34 | WebRtc_UWord32 EventQueueStartTime[MAX_DTMF_QUEUE_SIZE]; |
| 35 | WebRtc_UWord32 EventQueueEndTime[MAX_DTMF_QUEUE_SIZE]; |
| 36 | WebRtc_Word16 EventBufferSize; |
| 37 | WebRtc_Word16 framelen; |
| 38 | } dtmf_inst_t; |
| 39 | |
| 40 | /**************************************************************************** |
| 41 | * WebRtcNetEQ_DtmfDecoderInit(...) |
| 42 | * |
| 43 | * This function initializes a DTMF instance. |
| 44 | * |
| 45 | * Input: |
| 46 | * - DTMF_decinst_t : DTMF instance |
| 47 | * - fs : The sample rate used for the DTMF |
| 48 | * - MaxPLCtime : Maximum length for a PLC before zeros should be inserted |
| 49 | * |
| 50 | * Return value : 0 - Ok |
| 51 | * -1 - Error |
| 52 | */ |
| 53 | |
| 54 | WebRtc_Word16 WebRtcNetEQ_DtmfDecoderInit(dtmf_inst_t *DTMFdec_inst, WebRtc_UWord16 fs, |
| 55 | WebRtc_Word16 MaxPLCtime); |
| 56 | |
| 57 | /**************************************************************************** |
| 58 | * WebRtcNetEQ_DtmfInsertEvent(...) |
| 59 | * |
| 60 | * This function decodes a packet with DTMF frames. |
| 61 | * |
| 62 | * Input: |
| 63 | * - DTMFdec_inst : DTMF instance |
| 64 | * - encoded : Encoded DTMF frame(s) |
| 65 | * - len : Bytes in encoded vector |
| 66 | * |
| 67 | * |
| 68 | * Return value : 0 - Ok |
| 69 | * -1 - Error |
| 70 | */ |
| 71 | |
| 72 | WebRtc_Word16 WebRtcNetEQ_DtmfInsertEvent(dtmf_inst_t *DTMFdec_inst, |
| 73 | const WebRtc_Word16 *encoded, WebRtc_Word16 len, |
| 74 | WebRtc_UWord32 timeStamp); |
| 75 | |
| 76 | /**************************************************************************** |
| 77 | * WebRtcNetEQ_DtmfDecode(...) |
| 78 | * |
| 79 | * This function decodes a packet with DTMF frame(s). Output will be the |
| 80 | * event that should be played for next 10 ms. |
| 81 | * |
| 82 | * Input: |
| 83 | * - DTMFdec_inst : DTMF instance |
| 84 | * - currTimeStamp : The current playout timestamp |
| 85 | * |
| 86 | * Output: |
| 87 | * - event : Event number to be played |
| 88 | * - volume : Event volume to be played |
| 89 | * |
| 90 | * Return value : >0 - There is a event to be played |
| 91 | * 0 - No event to be played |
| 92 | * -1 - Error |
| 93 | */ |
| 94 | |
| 95 | WebRtc_Word16 WebRtcNetEQ_DtmfDecode(dtmf_inst_t *DTMFdec_inst, WebRtc_Word16 *event, |
| 96 | WebRtc_Word16 *volume, WebRtc_UWord32 currTimeStamp); |
| 97 | |
| 98 | #endif /* NETEQ_ATEVENT_DECODE */ |
| 99 | |
| 100 | #endif /* DTMF_BUFFER_H */ |
| 101 | |