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1 /***********************************************************************
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2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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3 Redistribution and use in source and binary forms, with or without
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4 modification, are permitted provided that the following conditions
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5 are met:
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6 - Redistributions of source code must retain the above copyright notice,
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7 this list of conditions and the following disclaimer.
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8 - Redistributions in binary form must reproduce the above copyright
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9 notice, this list of conditions and the following disclaimer in the
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10 documentation and/or other materials provided with the distribution.
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11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
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12 names of specific contributors, may be used to endorse or promote
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13 products derived from this software without specific prior written
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14 permission.
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15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 POSSIBILITY OF SUCH DAMAGE.
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26 ***********************************************************************/
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27
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28 #ifndef SILK_API_H
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29 #define SILK_API_H
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30
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31 #include "control.h"
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32 #include "typedef.h"
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33 #include "errors.h"
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34 #include "entenc.h"
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35 #include "entdec.h"
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36
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37 #ifdef __cplusplus
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38 extern "C"
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39 {
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40 #endif
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41
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42 #define SILK_MAX_FRAMES_PER_PACKET 3
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43
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44 /* Struct for TOC (Table of Contents) */
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45 typedef struct {
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46 opus_int VADFlag; /* Voice activity for packet */
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47 opus_int VADFlags[ SILK_MAX_FRAMES_PER_PACKET ]; /* Voice activity for each frame in packet */
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48 opus_int inbandFECFlag; /* Flag indicating if packet contains in-band FEC */
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49 } silk_TOC_struct;
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50
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51 /****************************************/
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52 /* Encoder functions */
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53 /****************************************/
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54
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55 /***********************************************/
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56 /* Get size in bytes of the Silk encoder state */
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57 /***********************************************/
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58 opus_int silk_Get_Encoder_Size( /* O Returns error code */
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59 opus_int *encSizeBytes /* O Number of bytes in SILK encoder state */
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60 );
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61
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62 /*************************/
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63 /* Init or reset encoder */
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64 /*************************/
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65 opus_int silk_InitEncoder( /* O Returns error code */
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66 void *encState, /* I/O State */
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67 int arch, /* I Run-time architecture */
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68 silk_EncControlStruct *encStatus /* O Encoder Status */
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69 );
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70
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71 /**************************/
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72 /* Encode frame with Silk */
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73 /**************************/
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74 /* Note: if prefillFlag is set, the input must contain 10 ms of audio, irrespective of what */
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75 /* encControl->payloadSize_ms is set to */
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76 opus_int silk_Encode( /* O Returns error code */
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77 void *encState, /* I/O State */
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78 silk_EncControlStruct *encControl, /* I Control status */
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79 const opus_int16 *samplesIn, /* I Speech sample input vector */
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80 opus_int nSamplesIn, /* I Number of samples in input vector */
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81 ec_enc *psRangeEnc, /* I/O Compressor data structure */
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82 opus_int32 *nBytesOut, /* I/O Number of bytes in payload (input: Max bytes) */
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83 const opus_int prefillFlag, /* I Flag to indicate prefilling buffers no coding */
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84 int activity /* I Decision of Opus voice activity detector */
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85 );
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86
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87 /****************************************/
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88 /* Decoder functions */
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89 /****************************************/
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90
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91 /***********************************************/
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92 /* Get size in bytes of the Silk decoder state */
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93 /***********************************************/
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94 opus_int silk_Get_Decoder_Size( /* O Returns error code */
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95 opus_int *decSizeBytes /* O Number of bytes in SILK decoder state */
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96 );
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97
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98 /*************************/
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99 /* Init or Reset decoder */
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100 /*************************/
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101 opus_int silk_InitDecoder( /* O Returns error code */
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102 void *decState /* I/O State */
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103 );
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104
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105 /******************/
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106 /* Decode a frame */
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107 /******************/
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108 opus_int silk_Decode( /* O Returns error code */
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109 void* decState, /* I/O State */
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110 silk_DecControlStruct* decControl, /* I/O Control Structure */
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111 opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */
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112 opus_int newPacketFlag, /* I Indicates first decoder call for this packet */
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113 ec_dec *psRangeDec, /* I/O Compressor data structure */
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114 opus_int16 *samplesOut, /* O Decoded output speech vector */
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115 opus_int32 *nSamplesOut, /* O Number of samples decoded */
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116 int arch /* I Run-time architecture */
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117 );
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118
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119 #if 0
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120 /**************************************/
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121 /* Get table of contents for a packet */
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122 /**************************************/
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123 opus_int silk_get_TOC(
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124 const opus_uint8 *payload, /* I Payload data */
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125 const opus_int nBytesIn, /* I Number of input bytes */
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126 const opus_int nFramesPerPayload, /* I Number of SILK frames per payload */
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127 silk_TOC_struct *Silk_TOC /* O Type of content */
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128 );
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129 #endif
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130
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131 #ifdef __cplusplus
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132 }
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133 #endif
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134
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135 #endif
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