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webrtc/modules/audio_coding/codecs/iSAC/fix/source/isacfix.c

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git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d
2011-05-30 13:22:19 +02:00
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*
* isacfix.c
*
* This C file contains the functions for the ISAC API
*
*/
#include <stdlib.h>
#include <string.h>
#include "isacfix.h"
#include "bandwidth_estimator.h"
#include "codec.h"
#include "entropy_coding.h"
#include "structs.h"
/**************************************************************************
* WebRtcIsacfix_AssignSize(...)
*
* Functions used when malloc is not allowed
* Returns number of bytes needed to allocate for iSAC struct.
*
*/
WebRtc_Word16 WebRtcIsacfix_AssignSize(int *sizeinbytes) {
*sizeinbytes=sizeof(ISACFIX_SubStruct)*2/sizeof(WebRtc_Word16);
return(0);
}
/***************************************************************************
* WebRtcIsacfix_Assign(...)
*
* Functions used when malloc is not allowed
* Place struct at given address
*
* If successful, Return 0, else Return -1
*/
WebRtc_Word16 WebRtcIsacfix_Assign(ISACFIX_MainStruct **inst, void *ISACFIX_inst_Addr) {
if (ISACFIX_inst_Addr!=NULL) {
*inst = (ISACFIX_MainStruct*)ISACFIX_inst_Addr;
(*(ISACFIX_SubStruct**)inst)->errorcode = 0;
(*(ISACFIX_SubStruct**)inst)->initflag = 0;
(*(ISACFIX_SubStruct**)inst)->ISACenc_obj.SaveEnc_ptr = NULL;
return(0);
} else {
return(-1);
}
}
#ifndef ISACFIX_NO_DYNAMIC_MEM
/****************************************************************************
* WebRtcIsacfix_Create(...)
*
* This function creates a ISAC instance, which will contain the state
* information for one coding/decoding channel.
*
* Input:
* - *ISAC_main_inst : a pointer to the coder instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Create(ISACFIX_MainStruct **ISAC_main_inst)
{
ISACFIX_SubStruct *tempo;
tempo = malloc(1 * sizeof(ISACFIX_SubStruct));
*ISAC_main_inst = (ISACFIX_MainStruct *)tempo;
if (*ISAC_main_inst!=NULL) {
(*(ISACFIX_SubStruct**)ISAC_main_inst)->errorcode = 0;
(*(ISACFIX_SubStruct**)ISAC_main_inst)->initflag = 0;
(*(ISACFIX_SubStruct**)ISAC_main_inst)->ISACenc_obj.SaveEnc_ptr = NULL;
return(0);
} else {
return(-1);
}
}
/****************************************************************************
* WebRtcIsacfix_CreateInternal(...)
*
* This function creates the memory that is used to store data in the encoder
*
* Input:
* - *ISAC_main_inst : a pointer to the coder instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_CreateInternal(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Allocate memory for storing encoder data */
ISAC_inst->ISACenc_obj.SaveEnc_ptr = malloc(1 * sizeof(ISAC_SaveEncData_t));
if (ISAC_inst->ISACenc_obj.SaveEnc_ptr!=NULL) {
return(0);
} else {
return(-1);
}
}
#endif
/****************************************************************************
* WebRtcIsacfix_Free(...)
*
* This function frees the ISAC instance created at the beginning.
*
* Input:
* - ISAC_main_inst : a ISAC instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Free(ISACFIX_MainStruct *ISAC_main_inst)
{
free(ISAC_main_inst);
return(0);
}
/****************************************************************************
* WebRtcIsacfix_FreeInternal(...)
*
* This function frees the internal memory for storing encoder data.
*
* Input:
* - ISAC_main_inst : a ISAC instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_FreeInternal(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Release memory */
free(ISAC_inst->ISACenc_obj.SaveEnc_ptr);
return(0);
}
/****************************************************************************
* WebRtcIsacfix_EncoderInit(...)
*
* This function initializes a ISAC instance prior to the encoder calls.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - CodingMode : 0 -> Bit rate and frame length are automatically
* adjusted to available bandwidth on
* transmission channel.
* 1 -> User sets a frame length and a target bit
* rate which is taken as the maximum short-term
* average bit rate.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_EncoderInit(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 CodingMode)
{
int k;
WebRtc_Word16 statusInit;
ISACFIX_SubStruct *ISAC_inst;
statusInit = 0;
/* typecast pointer to rela structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* flag encoder init */
ISAC_inst->initflag |= 2;
if (CodingMode == 0)
/* Adaptive mode */
ISAC_inst->ISACenc_obj.new_framelength = INITIAL_FRAMESAMPLES;
else if (CodingMode == 1)
/* Instantaneous mode */
ISAC_inst->ISACenc_obj.new_framelength = 480; /* default for I-mode */
else {
ISAC_inst->errorcode = ISAC_DISALLOWED_CODING_MODE;
statusInit = -1;
}
ISAC_inst->CodingMode = CodingMode;
WebRtcIsacfix_InitMaskingEnc(&ISAC_inst->ISACenc_obj.maskfiltstr_obj);
WebRtcIsacfix_InitPreFilterbank(&ISAC_inst->ISACenc_obj.prefiltbankstr_obj);
WebRtcIsacfix_InitPitchFilter(&ISAC_inst->ISACenc_obj.pitchfiltstr_obj);
WebRtcIsacfix_InitPitchAnalysis(&ISAC_inst->ISACenc_obj.pitchanalysisstr_obj);
WebRtcIsacfix_InitBandwidthEstimator(&ISAC_inst->bwestimator_obj);
WebRtcIsacfix_InitRateModel(&ISAC_inst->ISACenc_obj.rate_data_obj);
ISAC_inst->ISACenc_obj.buffer_index = 0;
ISAC_inst->ISACenc_obj.frame_nb = 0;
ISAC_inst->ISACenc_obj.BottleNeck = 32000; /* default for I-mode */
ISAC_inst->ISACenc_obj.MaxDelay = 10; /* default for I-mode */
ISAC_inst->ISACenc_obj.current_framesamples = 0;
ISAC_inst->ISACenc_obj.s2nr = 0;
ISAC_inst->ISACenc_obj.MaxBits = 0;
ISAC_inst->ISACenc_obj.bitstr_seed = 4447;
ISAC_inst->ISACenc_obj.payloadLimitBytes30 = STREAM_MAXW16_30MS << 1;
ISAC_inst->ISACenc_obj.payloadLimitBytes60 = STREAM_MAXW16_60MS << 1;
ISAC_inst->ISACenc_obj.maxPayloadBytes = STREAM_MAXW16_60MS << 1;
ISAC_inst->ISACenc_obj.maxRateInBytes = STREAM_MAXW16_30MS << 1;
ISAC_inst->ISACenc_obj.enforceFrameSize = 0;
/* Init the bistream data area to zero */
for (k=0; k<STREAM_MAXW16_60MS; k++){
ISAC_inst->ISACenc_obj.bitstr_obj.stream[k] = 0;
}
#ifdef NB_CALLS
WebRtcIsacfix_InitPostFilterbank(&ISAC_inst->ISACenc_obj.interpolatorstr_obj);
#endif
return statusInit;
}
/****************************************************************************
* WebRtcIsacfix_Encode(...)
*
* This function encodes 10ms frame(s) and inserts it into a package.
* Input speech length has to be 160 samples (10ms). The encoder buffers those
* 10ms frames until it reaches the chosen Framesize (480 or 960 samples
* corresponding to 30 or 60 ms frames), and then proceeds to the encoding.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - speechIn : input speech vector.
*
* Output:
* - encoded : the encoded data vector
*
* Return value:
* : >0 - Length (in bytes) of coded data
* : 0 - The buffer didn't reach the chosen framesize
* so it keeps buffering speech samples.
* : -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Encode(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_Word16 *speechIn,
WebRtc_Word16 *encoded)
{
ISACFIX_SubStruct *ISAC_inst;
WebRtc_Word16 stream_len;
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
/* typecast pointer to rela structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if encoder initiated */
if ((ISAC_inst->initflag & 2) != 2) {
ISAC_inst->errorcode = ISAC_ENCODER_NOT_INITIATED;
return (-1);
}
stream_len = WebRtcIsacfix_EncodeImpl((WebRtc_Word16*)speechIn,
&ISAC_inst->ISACenc_obj,
&ISAC_inst->bwestimator_obj,
ISAC_inst->CodingMode);
if (stream_len<0) {
ISAC_inst->errorcode = - stream_len;
return -1;
}
/* convert from bytes to WebRtc_Word16 */
#ifndef WEBRTC_BIG_ENDIAN
for (k=0;k<(stream_len+1)>>1;k++) {
encoded[k] = (WebRtc_Word16)( ( (WebRtc_UWord16)(ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] >> 8 )
| (((ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] & 0x00FF) << 8));
}
#else
WEBRTC_SPL_MEMCPY_W16(encoded, (ISAC_inst->ISACenc_obj.bitstr_obj).stream, (stream_len + 1)>>1);
#endif
return stream_len;
}
/****************************************************************************
* WebRtcIsacfix_EncodeNb(...)
*
* This function encodes 10ms narrow band (8 kHz sampling) frame(s) and inserts
* it into a package. Input speech length has to be 80 samples (10ms). The encoder
* interpolates into wide-band (16 kHz sampling) buffers those
* 10ms frames until it reaches the chosen Framesize (480 or 960 wide-band samples
* corresponding to 30 or 60 ms frames), and then proceeds to the encoding.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - speechIn : input speech vector.
*
* Output:
* - encoded : the encoded data vector
*
* Return value:
* : >0 - Length (in bytes) of coded data
* : 0 - The buffer didn't reach the chosen framesize
* so it keeps buffering speech samples.
* : -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_EncodeNb(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_Word16 *speechIn,
WebRtc_Word16 *encoded)
{
#ifdef NB_CALLS
ISACFIX_SubStruct *ISAC_inst;
WebRtc_Word16 stream_len;
WebRtc_Word16 speechInWB[FRAMESAMPLES_10ms];
WebRtc_Word16 Vector_Word16_1[FRAMESAMPLES_10ms/2];
WebRtc_Word16 Vector_Word16_2[FRAMESAMPLES_10ms/2];
int k;
/* typecast pointer to rela structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if encoder initiated */
if ((ISAC_inst->initflag & 2) != 2) {
ISAC_inst->errorcode = ISAC_ENCODER_NOT_INITIATED;
return (-1);
}
/* Oversample to WB */
/* Form polyphase signals, and compensate for DC offset */
for (k=0;k<FRAMESAMPLES_10ms/2;k++) {
Vector_Word16_1[k] = speechIn[k] + 1;
Vector_Word16_2[k] = speechIn[k];
}
WebRtcIsacfix_FilterAndCombine2(Vector_Word16_1, Vector_Word16_2, speechInWB, &ISAC_inst->ISACenc_obj.interpolatorstr_obj, FRAMESAMPLES_10ms);
/* Encode WB signal */
stream_len = WebRtcIsacfix_EncodeImpl((WebRtc_Word16*)speechInWB,
&ISAC_inst->ISACenc_obj,
&ISAC_inst->bwestimator_obj,
ISAC_inst->CodingMode);
if (stream_len<0) {
ISAC_inst->errorcode = - stream_len;
return -1;
}
/* convert from bytes to WebRtc_Word16 */
#ifndef WEBRTC_BIG_ENDIAN
for (k=0;k<(stream_len+1)>>1;k++) {
encoded[k] = (WebRtc_Word16)(((WebRtc_UWord16)(ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] >> 8)
| (((ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] & 0x00FF) << 8));
}
#else
WEBRTC_SPL_MEMCPY_W16(encoded, (ISAC_inst->ISACenc_obj.bitstr_obj).stream, (stream_len + 1)>>1);
#endif
return stream_len;
#else /* NB_CALLS not defined */
return -1;
#endif /* NB_CALLS */
}
/****************************************************************************
* WebRtcIsacfix_GetNewBitStream(...)
*
* This function returns encoded data, with the recieved bwe-index in the
* stream. It should always return a complete packet, i.e. only called once
* even for 60 msec frames
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - bweIndex : index of bandwidth estimate to put in new bitstream
*
* Output:
* - encoded : the encoded data vector
*
* Return value:
* : >0 - Length (in bytes) of coded data
* : -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_GetNewBitStream(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 bweIndex,
float scale,
WebRtc_Word16 *encoded)
{
ISACFIX_SubStruct *ISAC_inst;
WebRtc_Word16 stream_len;
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
/* typecast pointer to rela structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if encoder initiated */
if ((ISAC_inst->initflag & 2) != 2) {
ISAC_inst->errorcode = ISAC_ENCODER_NOT_INITIATED;
return (-1);
}
stream_len = WebRtcIsacfix_EncodeStoredData(&ISAC_inst->ISACenc_obj,
bweIndex,
scale,
ISAC_inst->CodingMode);
if (stream_len<0) {
ISAC_inst->errorcode = - stream_len;
return -1;
}
#ifndef WEBRTC_BIG_ENDIAN
for (k=0;k<(stream_len+1)>>1;k++) {
encoded[k] = (WebRtc_Word16)( ( (WebRtc_UWord16)(ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] >> 8 )
| (((ISAC_inst->ISACenc_obj.bitstr_obj).stream[k] & 0x00FF) << 8));
}
#else
WEBRTC_SPL_MEMCPY_W16(encoded, (ISAC_inst->ISACenc_obj.bitstr_obj).stream, (stream_len + 1)>>1);
#endif
return stream_len;
}
/****************************************************************************
* WebRtcIsacfix_DecoderInit(...)
*
* This function initializes a ISAC instance prior to the decoder calls.
*
* Input:
* - ISAC_main_inst : ISAC instance.
*
* Return value
* : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* flag decoder init */
ISAC_inst->initflag |= 1;
WebRtcIsacfix_InitMaskingDec(&ISAC_inst->ISACdec_obj.maskfiltstr_obj);
WebRtcIsacfix_InitPostFilterbank(&ISAC_inst->ISACdec_obj.postfiltbankstr_obj);
WebRtcIsacfix_InitPitchFilter(&ISAC_inst->ISACdec_obj.pitchfiltstr_obj);
/* TS */
WebRtcIsacfix_InitPlc( &ISAC_inst->ISACdec_obj.plcstr_obj );
#ifdef NB_CALLS
WebRtcIsacfix_InitPreFilterbank(&ISAC_inst->ISACdec_obj.decimatorstr_obj);
#endif
return 0;
}
/****************************************************************************
* WebRtcIsacfix_UpdateBwEstimate1(...)
*
* This function updates the estimate of the bandwidth.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s).
* - packet_size : size of the packet.
* - rtp_seq_number : the RTP number of the packet.
* - arr_ts : the arrival time of the packet (from NetEq)
* in samples.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_UpdateBwEstimate1(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word32 packet_size,
WebRtc_UWord16 rtp_seq_number,
WebRtc_UWord32 arr_ts)
{
ISACFIX_SubStruct *ISAC_inst;
Bitstr_dec streamdata;
WebRtc_UWord16 partOfStream[5];
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 err;
/* Set stream pointer to point at partOfStream */
streamdata.stream = (WebRtc_UWord16 *)partOfStream;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Sanity check of packet length */
if (packet_size <= 0) {
/* return error code if the packet length is null or less */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
} else if (packet_size > (STREAM_MAXW16<<1)) {
/* return error code if length of stream is too long */
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
return -1;
}
/* check if decoder initiated */
if ((ISAC_inst->initflag & 1) != 1) {
ISAC_inst->errorcode = ISAC_DECODER_NOT_INITIATED;
return (-1);
}
streamdata.W_upper = 0xFFFFFFFF;
streamdata.streamval = 0;
streamdata.stream_index = 0;
streamdata.full = 1;
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<5; k++) {
streamdata.stream[k] = (WebRtc_UWord16) (((WebRtc_UWord16)encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
#else
memcpy(streamdata.stream, encoded, 5);
#endif
if (packet_size == 0)
{
/* return error code if the packet length is null */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
}
err = WebRtcIsacfix_EstimateBandwidth(&ISAC_inst->bwestimator_obj,
&streamdata,
packet_size,
rtp_seq_number,
0,
arr_ts);
if (err < 0)
{
/* return error code if something went wrong */
ISAC_inst->errorcode = -err;
return -1;
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_UpdateBwEstimate(...)
*
* This function updates the estimate of the bandwidth.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s).
* - packet_size : size of the packet.
* - rtp_seq_number : the RTP number of the packet.
* - send_ts : Send Time Stamp from RTP header
* - arr_ts : the arrival time of the packet (from NetEq)
* in samples.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_UpdateBwEstimate(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word32 packet_size,
WebRtc_UWord16 rtp_seq_number,
WebRtc_UWord32 send_ts,
WebRtc_UWord32 arr_ts)
{
ISACFIX_SubStruct *ISAC_inst;
Bitstr_dec streamdata;
WebRtc_UWord16 partOfStream[5];
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 err;
/* Set stream pointer to point at partOfStream */
streamdata.stream = (WebRtc_UWord16 *)partOfStream;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Sanity check of packet length */
if (packet_size <= 0) {
/* return error code if the packet length is null or less */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
} else if (packet_size > (STREAM_MAXW16<<1)) {
/* return error code if length of stream is too long */
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
return -1;
}
/* check if decoder initiated */
if ((ISAC_inst->initflag & 1) != 1) {
ISAC_inst->errorcode = ISAC_DECODER_NOT_INITIATED;
return (-1);
}
streamdata.W_upper = 0xFFFFFFFF;
streamdata.streamval = 0;
streamdata.stream_index = 0;
streamdata.full = 1;
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<5; k++) {
streamdata.stream[k] = (WebRtc_UWord16) ((encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
#else
memcpy(streamdata.stream, encoded, 5);
#endif
if (packet_size == 0)
{
/* return error code if the packet length is null */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
}
err = WebRtcIsacfix_EstimateBandwidth(&ISAC_inst->bwestimator_obj,
&streamdata,
packet_size,
rtp_seq_number,
send_ts,
arr_ts);
if (err < 0)
{
/* return error code if something went wrong */
ISAC_inst->errorcode = -err;
return -1;
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_Decode(...)
*
* This function decodes a ISAC frame. Output speech length
* will be a multiple of 480 samples: 480 or 960 samples,
* depending on the framesize (30 or 60 ms).
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s)
* - len : bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Decode(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
ISACFIX_SubStruct *ISAC_inst;
/* number of samples (480 or 960), output from decoder */
/* that were actually used in the encoder/decoder (determined on the fly) */
WebRtc_Word16 number_of_samples;
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 declen = 0;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if decoder initiated */
if ((ISAC_inst->initflag & 1) != 1) {
ISAC_inst->errorcode = ISAC_DECODER_NOT_INITIATED;
return (-1);
}
/* Sanity check of packet length */
if (len <= 0) {
/* return error code if the packet length is null or less */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
} else if (len > (STREAM_MAXW16<<1)) {
/* return error code if length of stream is too long */
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
return -1;
}
(ISAC_inst->ISACdec_obj.bitstr_obj).stream = (WebRtc_UWord16 *)encoded;
/* convert bitstream from WebRtc_Word16 to bytes */
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<(len>>1); k++) {
(ISAC_inst->ISACdec_obj.bitstr_obj).stream[k] = (WebRtc_UWord16) ((encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
if (len & 0x0001)
(ISAC_inst->ISACdec_obj.bitstr_obj).stream[k] = (WebRtc_UWord16) ((encoded[k] & 0xFF)<<8);
#endif
/* added for NetEq purposes (VAD/DTX related) */
*speechType=1;
declen = WebRtcIsacfix_DecodeImpl(decoded,&ISAC_inst->ISACdec_obj, &number_of_samples);
if (declen < 0) {
/* Some error inside the decoder */
ISAC_inst->errorcode = -declen;
memset(decoded, 0, sizeof(WebRtc_Word16) * MAX_FRAMESAMPLES);
return -1;
}
/* error check */
if (declen & 0x0001) {
if (len != declen && len != declen + (((ISAC_inst->ISACdec_obj.bitstr_obj).stream[declen>>1]) & 0x00FF) ) {
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
memset(decoded, 0, sizeof(WebRtc_Word16) * number_of_samples);
return -1;
}
} else {
if (len != declen && len != declen + (((ISAC_inst->ISACdec_obj.bitstr_obj).stream[declen>>1]) >> 8) ) {
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
memset(decoded, 0, sizeof(WebRtc_Word16) * number_of_samples);
return -1;
}
}
return number_of_samples;
}
/****************************************************************************
* WebRtcIsacfix_DecodeNb(...)
*
* This function decodes a ISAC frame in narrow-band (8 kHz sampling).
* Output speech length will be a multiple of 240 samples: 240 or 480 samples,
* depending on the framesize (30 or 60 ms).
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s)
* - len : bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodeNb(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
#ifdef NB_CALLS
ISACFIX_SubStruct *ISAC_inst;
/* twice the number of samples (480 or 960), output from decoder */
/* that were actually used in the encoder/decoder (determined on the fly) */
WebRtc_Word16 number_of_samples;
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 declen = 0;
WebRtc_Word16 dummy[FRAMESAMPLES/2];
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if decoder initiated */
if ((ISAC_inst->initflag & 1) != 1) {
ISAC_inst->errorcode = ISAC_DECODER_NOT_INITIATED;
return (-1);
}
if (len == 0)
{ /* return error code if the packet length is null */
ISAC_inst->errorcode = ISAC_EMPTY_PACKET;
return -1;
}
(ISAC_inst->ISACdec_obj.bitstr_obj).stream = (WebRtc_UWord16 *)encoded;
/* convert bitstream from WebRtc_Word16 to bytes */
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<(len>>1); k++) {
(ISAC_inst->ISACdec_obj.bitstr_obj).stream[k] = (WebRtc_UWord16) ((encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
if (len & 0x0001)
(ISAC_inst->ISACdec_obj.bitstr_obj).stream[k] = (WebRtc_UWord16) ((encoded[k] & 0xFF)<<8);
#endif
/* added for NetEq purposes (VAD/DTX related) */
*speechType=1;
declen = WebRtcIsacfix_DecodeImpl(decoded,&ISAC_inst->ISACdec_obj, &number_of_samples);
if (declen < 0) {
/* Some error inside the decoder */
ISAC_inst->errorcode = -declen;
memset(decoded, 0, sizeof(WebRtc_Word16) * FRAMESAMPLES);
return -1;
}
/* error check */
if (declen & 0x0001) {
if (len != declen && len != declen + (((ISAC_inst->ISACdec_obj.bitstr_obj).stream[declen>>1]) & 0x00FF) ) {
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
memset(decoded, 0, sizeof(WebRtc_Word16) * number_of_samples);
return -1;
}
} else {
if (len != declen && len != declen + (((ISAC_inst->ISACdec_obj.bitstr_obj).stream[declen>>1]) >> 8) ) {
ISAC_inst->errorcode = ISAC_LENGTH_MISMATCH;
memset(decoded, 0, sizeof(WebRtc_Word16) * number_of_samples);
return -1;
}
}
WebRtcIsacfix_SplitAndFilter2(decoded, decoded, dummy, &ISAC_inst->ISACdec_obj.decimatorstr_obj);
if (number_of_samples>FRAMESAMPLES) {
WebRtcIsacfix_SplitAndFilter2(decoded + FRAMESAMPLES, decoded + FRAMESAMPLES/2,
dummy, &ISAC_inst->ISACdec_obj.decimatorstr_obj);
}
return number_of_samples/2;
#else /* NB_CALLS not defined */
return -1;
#endif /* NB_CALLS */
}
/****************************************************************************
* WebRtcIsacfix_DecodePlcNb(...)
*
* This function conducts PLC for ISAC frame(s) in narrow-band (8kHz sampling).
* Output speech length will be "240*noOfLostFrames" samples
* that is equevalent of "30*noOfLostFrames" millisecond.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - noOfLostFrames : Number of PLC frames (240 sample=30ms) to produce
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodePlcNb(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames )
{
#ifdef NB_CALLS
WebRtc_Word16 no_of_samples, declen, k, ok;
WebRtc_Word16 outframeNB[FRAMESAMPLES];
WebRtc_Word16 outframeWB[FRAMESAMPLES];
WebRtc_Word16 dummy[FRAMESAMPLES/2];
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Limit number of frames to two = 60 msec. Otherwise we exceed data vectors */
if (noOfLostFrames > 2){
noOfLostFrames = 2;
}
k = 0;
declen = 0;
while( noOfLostFrames > 0 )
{
ok = WebRtcIsacfix_DecodePlcImpl( outframeWB, &ISAC_inst->ISACdec_obj, &no_of_samples );
if(ok)
return -1;
WebRtcIsacfix_SplitAndFilter2(outframeWB, &(outframeNB[k*240]), dummy, &ISAC_inst->ISACdec_obj.decimatorstr_obj);
declen += no_of_samples;
noOfLostFrames--;
k++;
}
declen>>=1;
for (k=0;k<declen;k++) {
decoded[k] = outframeNB[k];
}
return declen;
#else /* NB_CALLS not defined */
return -1;
#endif /* NB_CALLS */
}
/****************************************************************************
* WebRtcIsacfix_DecodePlc(...)
*
* This function conducts PLC for ISAC frame(s) in wide-band (16kHz sampling).
* Output speech length will be "480*noOfLostFrames" samples
* that is equevalent of "30*noOfLostFrames" millisecond.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - noOfLostFrames : Number of PLC frames (480sample = 30ms)
* to produce
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodePlc(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames)
{
WebRtc_Word16 no_of_samples, declen, k, ok;
WebRtc_Word16 outframe16[MAX_FRAMESAMPLES];
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Limit number of frames to two = 60 msec. Otherwise we exceed data vectors */
if (noOfLostFrames > 2) {
noOfLostFrames = 2;
}
k = 0;
declen = 0;
while( noOfLostFrames > 0 )
{
ok = WebRtcIsacfix_DecodePlcImpl( &(outframe16[k*480]), &ISAC_inst->ISACdec_obj, &no_of_samples );
if(ok)
return -1;
declen += no_of_samples;
noOfLostFrames--;
k++;
}
for (k=0;k<declen;k++) {
decoded[k] = outframe16[k];
}
return declen;
}
/****************************************************************************
* WebRtcIsacfix_Control(...)
*
* This function sets the limit on the short-term average bit rate and the
* frame length. Should be used only in Instantaneous mode.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - rate : limit on the short-term average bit rate,
* in bits/second (between 10000 and 32000)
* - framesize : number of milliseconds per frame (30 or 60)
*
* Return value : 0 - ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Control(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 rate,
WebRtc_Word16 framesize)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
if (ISAC_inst->CodingMode == 0)
{
/* in adaptive mode */
ISAC_inst->errorcode = ISAC_MODE_MISMATCH;
return -1;
}
if (rate >= 10000 && rate <= 32000)
ISAC_inst->ISACenc_obj.BottleNeck = rate;
else {
ISAC_inst->errorcode = ISAC_DISALLOWED_BOTTLENECK;
return -1;
}
if (framesize == 30 || framesize == 60)
ISAC_inst->ISACenc_obj.new_framelength = (FS/1000) * framesize;
else {
ISAC_inst->errorcode = ISAC_DISALLOWED_FRAME_LENGTH;
return -1;
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_ControlBwe(...)
*
* This function sets the initial values of bottleneck and frame-size if
* iSAC is used in channel-adaptive mode. Through this API, users can
* enforce a frame-size for all values of bottleneck. Then iSAC will not
* automatically change the frame-size.
*
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - rateBPS : initial value of bottleneck in bits/second
* 10000 <= rateBPS <= 32000 is accepted
* For default bottleneck set rateBPS = 0
* - frameSizeMs : number of milliseconds per frame (30 or 60)
* - enforceFrameSize : 1 to enforce the given frame-size through out
* the adaptation process, 0 to let iSAC change
* the frame-size if required.
*
* Return value : 0 - ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_ControlBwe(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 rateBPS,
WebRtc_Word16 frameSizeMs,
WebRtc_Word16 enforceFrameSize)
{
ISACFIX_SubStruct *ISAC_inst;
/* Typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* check if encoder initiated */
if ((ISAC_inst->initflag & 2) != 2) {
ISAC_inst->errorcode = ISAC_ENCODER_NOT_INITIATED;
return (-1);
}
/* Check that we are in channel-adaptive mode, otherwise, return -1 */
if (ISAC_inst->CodingMode != 0) {
ISAC_inst->errorcode = ISAC_MODE_MISMATCH;
return (-1);
}
/* Set struct variable if enforceFrameSize is set. ISAC will then keep the */
/* chosen frame size. */
ISAC_inst->ISACenc_obj.enforceFrameSize = (enforceFrameSize != 0)? 1:0;
/* Set initial rate, if value between 10000 and 32000, */
/* if rateBPS is 0, keep the default initial bottleneck value (15000) */
if ((rateBPS >= 10000) && (rateBPS <= 32000)) {
ISAC_inst->bwestimator_obj.sendBwAvg = (((WebRtc_UWord32)rateBPS) << 7);
} else if (rateBPS != 0) {
ISAC_inst->errorcode = ISAC_DISALLOWED_BOTTLENECK;
return -1;
}
/* Set initial framesize. If enforceFrameSize is set the frame size will not change */
if ((frameSizeMs == 30) || (frameSizeMs == 60)) {
ISAC_inst->ISACenc_obj.new_framelength = (FS/1000) * frameSizeMs;
} else {
ISAC_inst->errorcode = ISAC_DISALLOWED_FRAME_LENGTH;
return -1;
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_GetDownLinkBwIndex(...)
*
* This function returns index representing the Bandwidth estimate from
* other side to this side.
*
* Input:
* - ISAC_main_inst: iSAC struct
*
* Output:
* - rateIndex : Bandwidth estimate to transmit to other side.
*
*/
WebRtc_Word16 WebRtcIsacfix_GetDownLinkBwIndex(ISACFIX_MainStruct* ISAC_main_inst,
WebRtc_Word16* rateIndex)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Call function to get Bandwidth Estimate */
*rateIndex = WebRtcIsacfix_GetDownlinkBwIndexImpl(&ISAC_inst->bwestimator_obj);
return 0;
}
/****************************************************************************
* WebRtcIsacfix_UpdateUplinkBw(...)
*
* This function takes an index representing the Bandwidth estimate from
* this side to other side and updates BWE.
*
* Input:
* - ISAC_main_inst: iSAC struct
* - rateIndex : Bandwidth estimate from other side.
*
*/
WebRtc_Word16 WebRtcIsacfix_UpdateUplinkBw(ISACFIX_MainStruct* ISAC_main_inst,
WebRtc_Word16 rateIndex)
{
WebRtc_Word16 err = 0;
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
/* Call function to update BWE with received Bandwidth Estimate */
err = WebRtcIsacfix_UpdateUplinkBwRec(&ISAC_inst->bwestimator_obj, rateIndex);
if (err < 0) {
ISAC_inst->errorcode = -err;
return (-1);
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_ReadFrameLen(...)
*
* This function returns the length of the frame represented in the packet.
*
* Input:
* - encoded : Encoded bitstream
*
* Output:
* - frameLength : Length of frame in packet (in samples)
*
*/
WebRtc_Word16 WebRtcIsacfix_ReadFrameLen(const WebRtc_Word16* encoded,
WebRtc_Word16* frameLength)
{
Bitstr_dec streamdata;
WebRtc_UWord16 partOfStream[5];
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 err;
/* Set stream pointer to point at partOfStream */
streamdata.stream = (WebRtc_UWord16 *)partOfStream;
streamdata.W_upper = 0xFFFFFFFF;
streamdata.streamval = 0;
streamdata.stream_index = 0;
streamdata.full = 1;
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<5; k++) {
streamdata.stream[k] = (WebRtc_UWord16) (((WebRtc_UWord16)encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
#else
memcpy(streamdata.stream, encoded, 5);
#endif
/* decode frame length */
err = WebRtcIsacfix_DecodeFrameLen(&streamdata, frameLength);
if (err<0) // error check
return err;
return 0;
}
/****************************************************************************
* WebRtcIsacfix_ReadBwIndex(...)
*
* This function returns the index of the Bandwidth estimate from the bitstream.
*
* Input:
* - encoded : Encoded bitstream
*
* Output:
* - frameLength : Length of frame in packet (in samples)
* - rateIndex : Bandwidth estimate in bitstream
*
*/
WebRtc_Word16 WebRtcIsacfix_ReadBwIndex(const WebRtc_Word16* encoded,
WebRtc_Word16* rateIndex)
{
Bitstr_dec streamdata;
WebRtc_UWord16 partOfStream[5];
#ifndef WEBRTC_BIG_ENDIAN
int k;
#endif
WebRtc_Word16 err;
/* Set stream pointer to point at partOfStream */
streamdata.stream = (WebRtc_UWord16 *)partOfStream;
streamdata.W_upper = 0xFFFFFFFF;
streamdata.streamval = 0;
streamdata.stream_index = 0;
streamdata.full = 1;
#ifndef WEBRTC_BIG_ENDIAN
for (k=0; k<5; k++) {
streamdata.stream[k] = (WebRtc_UWord16) (((WebRtc_UWord16)encoded[k] >> 8)|((encoded[k] & 0xFF)<<8));
}
#else
memcpy(streamdata.stream, encoded, 5);
#endif
/* decode frame length, needed to get to the rateIndex in the bitstream */
err = WebRtcIsacfix_DecodeFrameLen(&streamdata, rateIndex);
if (err<0) // error check
return err;
/* decode BW estimation */
err = WebRtcIsacfix_DecodeSendBandwidth(&streamdata, rateIndex);
if (err<0) // error check
return err;
return 0;
}
/****************************************************************************
* WebRtcIsacfix_GetErrorCode(...)
*
* This function can be used to check the error code of an iSAC instance. When
* a function returns -1 a error code will be set for that instance. The
* function below extract the code of the last error that occured in the
* specified instance.
*
* Input:
* - ISAC_main_inst : ISAC instance
*
* Return value : Error code
*/
WebRtc_Word16 WebRtcIsacfix_GetErrorCode(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
return ISAC_inst->errorcode;
}
/****************************************************************************
* WebRtcIsacfix_GetUplinkBw(...)
*
* This function returns the inst quantized iSAC send bitrate
*
* Input:
* - ISAC_main_inst : iSAC instance
*
* Return value : bitrate
*/
WebRtc_Word32 WebRtcIsacfix_GetUplinkBw(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
BwEstimatorstr * bw = (BwEstimatorstr*)&(ISAC_inst->bwestimator_obj);
return (WebRtc_Word32) WebRtcIsacfix_GetUplinkBandwidth(bw);
}
/****************************************************************************
* WebRtcIsacfix_GetNewFrameLen(...)
*
* This function return the next frame length (in samples) of iSAC.
*
* Input:
* - ISAC_main_inst : iSAC instance
*
* Return value : frame lenght in samples
*/
WebRtc_Word16 WebRtcIsacfix_GetNewFrameLen(ISACFIX_MainStruct *ISAC_main_inst)
{
ISACFIX_SubStruct *ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
return ISAC_inst->ISACenc_obj.new_framelength;
}
/****************************************************************************
* WebRtcIsacfix_SetMaxPayloadSize(...)
*
* This function sets a limit for the maximum payload size of iSAC. The same
* value is used both for 30 and 60 msec packets.
* The absolute max will be valid until next time the function is called.
* NOTE! This function may override the function WebRtcIsacfix_SetMaxRate()
*
* Input:
* - ISAC_main_inst : iSAC instance
* - maxPayloadBytes : maximum size of the payload in bytes
* valid values are between 100 and 400 bytes
*
*
* Return value : 0 if sucessful
* -1 if error happens
*/
WebRtc_Word16 WebRtcIsacfix_SetMaxPayloadSize(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 maxPayloadBytes)
{
ISACFIX_SubStruct *ISAC_inst;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
if((maxPayloadBytes < 100) || (maxPayloadBytes > 400))
{
/* maxPayloadBytes is out of valid range */
return -1;
}
else
{
/* Set new absolute max, which will not change unless this function
is called again with a new value */
ISAC_inst->ISACenc_obj.maxPayloadBytes = maxPayloadBytes;
/* Set new maximum values for 30 and 60 msec packets */
if (maxPayloadBytes < ISAC_inst->ISACenc_obj.maxRateInBytes) {
ISAC_inst->ISACenc_obj.payloadLimitBytes30 = maxPayloadBytes;
} else {
ISAC_inst->ISACenc_obj.payloadLimitBytes30 = ISAC_inst->ISACenc_obj.maxRateInBytes;
}
if ( maxPayloadBytes < (ISAC_inst->ISACenc_obj.maxRateInBytes << 1)) {
ISAC_inst->ISACenc_obj.payloadLimitBytes60 = maxPayloadBytes;
} else {
ISAC_inst->ISACenc_obj.payloadLimitBytes60 = (ISAC_inst->ISACenc_obj.maxRateInBytes << 1);
}
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_SetMaxRate(...)
*
* This function sets the maximum rate which the codec may not exceed for a
* singel packet. The maximum rate is set in bits per second.
* The codec has an absolute maximum rate of 53400 bits per second (200 bytes
* per 30 msec).
* It is possible to set a maximum rate between 32000 and 53400 bits per second.
*
* The rate limit is valid until next time the function is called.
*
* NOTE! Packet size will never go above the value set if calling
* WebRtcIsacfix_SetMaxPayloadSize() (default max packet size is 400 bytes).
*
* Input:
* - ISAC_main_inst : iSAC instance
* - maxRateInBytes : maximum rate in bits per second,
* valid values are 32000 to 53400 bits
*
* Return value : 0 if sucessful
* -1 if error happens
*/
WebRtc_Word16 WebRtcIsacfix_SetMaxRate(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word32 maxRate)
{
ISACFIX_SubStruct *ISAC_inst;
WebRtc_Word16 maxRateInBytes;
/* typecast pointer to real structure */
ISAC_inst = (ISACFIX_SubStruct *)ISAC_main_inst;
if((maxRate < 32000) || (maxRate > 53400))
{
/* maxRate is out of valid range */
return -1;
}
else
{
/* Calculate maximum number of bytes per 30 msec packets for the given
maximum rate. Multiply with 30/1000 to get number of bits per 30 msec,
divide by 8 to get number of bytes per 30 msec:
maxRateInBytes = floor((maxRate * 30/1000) / 8); */
maxRateInBytes = (WebRtc_Word16)( WebRtcSpl_DivW32W16ResW16(WEBRTC_SPL_MUL(maxRate, 3), 800) );
/* Store the value for usage in the WebRtcIsacfix_SetMaxPayloadSize-function */
ISAC_inst->ISACenc_obj.maxRateInBytes = maxRateInBytes;
/* For 30 msec packets: if the new limit is below the maximum
payload size, set a new limit */
if (maxRateInBytes < ISAC_inst->ISACenc_obj.maxPayloadBytes) {
ISAC_inst->ISACenc_obj.payloadLimitBytes30 = maxRateInBytes;
} else {
ISAC_inst->ISACenc_obj.payloadLimitBytes30 = ISAC_inst->ISACenc_obj.maxPayloadBytes;
}
/* For 60 msec packets: if the new limit (times 2) is below the
maximum payload size, set a new limit */
if ( (maxRateInBytes << 1) < ISAC_inst->ISACenc_obj.maxPayloadBytes) {
ISAC_inst->ISACenc_obj.payloadLimitBytes60 = (maxRateInBytes << 1);
} else {
ISAC_inst->ISACenc_obj.payloadLimitBytes60 = ISAC_inst->ISACenc_obj.maxPayloadBytes;
}
}
return 0;
}
/****************************************************************************
* WebRtcIsacfix_version(...)
*
* This function returns the version number.
*
* Output:
* - version : Pointer to character string
*
*/
void WebRtcIsacfix_version(char *version)
{
strcpy(version, "3.6.0");
}
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