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