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webrtc/modules/audio_coding/codecs/iLBC/main/source/ilbc.c

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/*
* 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.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
iLBCInterface.c
******************************************************************/
#include "ilbc.h"
#include "defines.h"
#include "init_encode.h"
#include "encode.h"
#include "init_decode.h"
#include "decode.h"
#include <stdlib.h>
WebRtc_Word16 WebRtcIlbcfix_EncoderAssign(iLBC_encinst_t **iLBC_encinst, WebRtc_Word16 *ILBCENC_inst_Addr, WebRtc_Word16 *size) {
*iLBC_encinst=(iLBC_encinst_t*)ILBCENC_inst_Addr;
*size=sizeof(iLBC_Enc_Inst_t)/sizeof(WebRtc_Word16);
if (*iLBC_encinst!=NULL) {
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_DecoderAssign(iLBC_decinst_t **iLBC_decinst, WebRtc_Word16 *ILBCDEC_inst_Addr, WebRtc_Word16 *size) {
*iLBC_decinst=(iLBC_decinst_t*)ILBCDEC_inst_Addr;
*size=sizeof(iLBC_Dec_Inst_t)/sizeof(WebRtc_Word16);
if (*iLBC_decinst!=NULL) {
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_EncoderCreate(iLBC_encinst_t **iLBC_encinst) {
*iLBC_encinst=(iLBC_encinst_t*)malloc(sizeof(iLBC_Enc_Inst_t));
if (*iLBC_encinst!=NULL) {
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_DecoderCreate(iLBC_decinst_t **iLBC_decinst) {
*iLBC_decinst=(iLBC_decinst_t*)malloc(sizeof(iLBC_Dec_Inst_t));
if (*iLBC_decinst!=NULL) {
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_EncoderFree(iLBC_encinst_t *iLBC_encinst) {
free(iLBC_encinst);
return(0);
}
WebRtc_Word16 WebRtcIlbcfix_DecoderFree(iLBC_decinst_t *iLBC_decinst) {
free(iLBC_decinst);
return(0);
}
WebRtc_Word16 WebRtcIlbcfix_EncoderInit(iLBC_encinst_t *iLBCenc_inst, WebRtc_Word16 mode)
{
if ((mode==20)||(mode==30)) {
WebRtcIlbcfix_InitEncode((iLBC_Enc_Inst_t*) iLBCenc_inst, mode);
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_Encode(iLBC_encinst_t *iLBCenc_inst, WebRtc_Word16 *speechIn, WebRtc_Word16 len, WebRtc_Word16 *encoded) {
WebRtc_Word16 pos = 0;
WebRtc_Word16 encpos = 0;
if ((len != ((iLBC_Enc_Inst_t*)iLBCenc_inst)->blockl) &&
#ifdef SPLIT_10MS
(len != 80) &&
#endif
(len != 2*((iLBC_Enc_Inst_t*)iLBCenc_inst)->blockl) &&
(len != 3*((iLBC_Enc_Inst_t*)iLBCenc_inst)->blockl))
{
/* A maximum of 3 frames/packet is allowed */
return(-1);
} else {
/* call encoder */
while (pos<len) {
WebRtcIlbcfix_EncodeImpl((WebRtc_UWord16*) &encoded[encpos], &speechIn[pos], (iLBC_Enc_Inst_t*) iLBCenc_inst);
#ifdef SPLIT_10MS
pos += 80;
if(((iLBC_Enc_Inst_t*)iLBCenc_inst)->section == 0)
#else
pos += ((iLBC_Enc_Inst_t*)iLBCenc_inst)->blockl;
#endif
encpos += ((iLBC_Enc_Inst_t*)iLBCenc_inst)->no_of_words;
}
return (encpos*2);
}
}
WebRtc_Word16 WebRtcIlbcfix_DecoderInit(iLBC_decinst_t *iLBCdec_inst, WebRtc_Word16 mode) {
if ((mode==20)||(mode==30)) {
WebRtcIlbcfix_InitDecode((iLBC_Dec_Inst_t*) iLBCdec_inst, mode, 1);
return(0);
} else {
return(-1);
}
}
WebRtc_Word16 WebRtcIlbcfix_DecoderInit20Ms(iLBC_decinst_t *iLBCdec_inst) {
WebRtcIlbcfix_InitDecode((iLBC_Dec_Inst_t*) iLBCdec_inst, 20, 1);
return(0);
}
WebRtc_Word16 WebRtcIlbcfix_Decoderinit30Ms(iLBC_decinst_t *iLBCdec_inst) {
WebRtcIlbcfix_InitDecode((iLBC_Dec_Inst_t*) iLBCdec_inst, 30, 1);
return(0);
}
WebRtc_Word16 WebRtcIlbcfix_Decode(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
int i=0;
/* Allow for automatic switching between the frame sizes
(although you do get some discontinuity) */
if ((len==((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==2*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==3*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
/* Test if the mode has changed */
if (((iLBC_Dec_Inst_t*)iLBCdec_inst)->mode==20) {
if ((len==NO_OF_BYTES_30MS)||
(len==2*NO_OF_BYTES_30MS)||
(len==3*NO_OF_BYTES_30MS)) {
WebRtcIlbcfix_InitDecode(((iLBC_Dec_Inst_t*)iLBCdec_inst), 30, ((iLBC_Dec_Inst_t*)iLBCdec_inst)->use_enhancer);
} else {
/* Unsupported frame length */
return(-1);
}
} else {
if ((len==NO_OF_BYTES_20MS)||
(len==2*NO_OF_BYTES_20MS)||
(len==3*NO_OF_BYTES_20MS)) {
WebRtcIlbcfix_InitDecode(((iLBC_Dec_Inst_t*)iLBCdec_inst), 20, ((iLBC_Dec_Inst_t*)iLBCdec_inst)->use_enhancer);
} else {
/* Unsupported frame length */
return(-1);
}
}
}
while ((i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)<len) {
WebRtcIlbcfix_DecodeImpl(&decoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl], (WebRtc_UWord16*) &encoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_words], (iLBC_Dec_Inst_t*) iLBCdec_inst, 1);
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return(i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl);
}
WebRtc_Word16 WebRtcIlbcfix_Decode20Ms(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
int i=0;
if ((len==((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==2*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==3*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
return(-1);
}
while ((i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)<len) {
WebRtcIlbcfix_DecodeImpl(&decoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl], (WebRtc_UWord16*) &encoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_words], (iLBC_Dec_Inst_t*) iLBCdec_inst, 1);
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return(i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl);
}
WebRtc_Word16 WebRtcIlbcfix_Decode30Ms(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
int i=0;
if ((len==((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==2*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)||
(len==3*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
return(-1);
}
while ((i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_bytes)<len) {
WebRtcIlbcfix_DecodeImpl(&decoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl], (WebRtc_UWord16*) &encoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->no_of_words], (iLBC_Dec_Inst_t*) iLBCdec_inst, 1);
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return(i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl);
}
WebRtc_Word16 WebRtcIlbcfix_DecodePlc(iLBC_decinst_t *iLBCdec_inst, WebRtc_Word16 *decoded, WebRtc_Word16 noOfLostFrames) {
int i;
WebRtc_UWord16 dummy;
for (i=0;i<noOfLostFrames;i++) {
/* call decoder */
WebRtcIlbcfix_DecodeImpl(&decoded[i*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl], &dummy, (iLBC_Dec_Inst_t*) iLBCdec_inst, 0);
}
return (noOfLostFrames*((iLBC_Dec_Inst_t*)iLBCdec_inst)->blockl);
}
WebRtc_Word16 WebRtcIlbcfix_NetEqPlc(iLBC_decinst_t *iLBCdec_inst, WebRtc_Word16 *decoded, WebRtc_Word16 noOfLostFrames) {
/* Two input parameters not used, but needed for function pointers in NetEQ */
decoded = decoded;
noOfLostFrames = noOfLostFrames;
WebRtcSpl_MemSetW16(((iLBC_Dec_Inst_t*)iLBCdec_inst)->enh_buf, 0, ENH_BUFL);
((iLBC_Dec_Inst_t*)iLBCdec_inst)->prev_enh_pl = 2;
return (0);
}
void WebRtcIlbcfix_version(WebRtc_Word8 *version)
{
strcpy((char*)version, "1.1.0");
}
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