287 lines
8.7 KiB
C
287 lines
8.7 KiB
C
/*
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* Copyright (c) 2012 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 <stdlib.h>
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#include "modules/audio_coding/codecs/ilbc/ilbc.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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#include "modules/audio_coding/codecs/ilbc/init_encode.h"
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#include "modules/audio_coding/codecs/ilbc/encode.h"
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#include "modules/audio_coding/codecs/ilbc/init_decode.h"
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#include "modules/audio_coding/codecs/ilbc/decode.h"
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#include "rtc_base/checks.h"
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int16_t WebRtcIlbcfix_EncoderAssign(IlbcEncoderInstance** iLBC_encinst,
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int16_t* ILBCENC_inst_Addr,
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int16_t* size) {
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*iLBC_encinst=(IlbcEncoderInstance*)ILBCENC_inst_Addr;
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*size=sizeof(IlbcEncoder)/sizeof(int16_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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int16_t WebRtcIlbcfix_DecoderAssign(IlbcDecoderInstance** iLBC_decinst,
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int16_t* ILBCDEC_inst_Addr,
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int16_t* size) {
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*iLBC_decinst=(IlbcDecoderInstance*)ILBCDEC_inst_Addr;
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*size=sizeof(IlbcDecoder)/sizeof(int16_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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int16_t WebRtcIlbcfix_EncoderCreate(IlbcEncoderInstance **iLBC_encinst) {
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*iLBC_encinst=(IlbcEncoderInstance*)malloc(sizeof(IlbcEncoder));
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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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int16_t WebRtcIlbcfix_DecoderCreate(IlbcDecoderInstance **iLBC_decinst) {
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*iLBC_decinst=(IlbcDecoderInstance*)malloc(sizeof(IlbcDecoder));
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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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int16_t WebRtcIlbcfix_EncoderFree(IlbcEncoderInstance *iLBC_encinst) {
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free(iLBC_encinst);
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return(0);
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}
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int16_t WebRtcIlbcfix_DecoderFree(IlbcDecoderInstance *iLBC_decinst) {
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free(iLBC_decinst);
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return(0);
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}
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int16_t WebRtcIlbcfix_EncoderInit(IlbcEncoderInstance* iLBCenc_inst,
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int16_t mode) {
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if ((mode==20)||(mode==30)) {
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WebRtcIlbcfix_InitEncode((IlbcEncoder*) 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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int WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
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const int16_t* speechIn,
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size_t len,
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uint8_t* encoded) {
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size_t pos = 0;
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size_t encpos = 0;
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if ((len != ((IlbcEncoder*)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*((IlbcEncoder*)iLBCenc_inst)->blockl) &&
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(len != 3*((IlbcEncoder*)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((uint16_t*)&encoded[2 * encpos], &speechIn[pos],
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(IlbcEncoder*)iLBCenc_inst);
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#ifdef SPLIT_10MS
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pos += 80;
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if(((IlbcEncoder*)iLBCenc_inst)->section == 0)
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#else
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pos += ((IlbcEncoder*)iLBCenc_inst)->blockl;
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#endif
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encpos += ((IlbcEncoder*)iLBCenc_inst)->no_of_words;
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}
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return (int)(encpos*2);
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}
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}
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int16_t WebRtcIlbcfix_DecoderInit(IlbcDecoderInstance* iLBCdec_inst,
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int16_t mode) {
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if ((mode==20)||(mode==30)) {
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WebRtcIlbcfix_InitDecode((IlbcDecoder*) 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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void WebRtcIlbcfix_DecoderInit20Ms(IlbcDecoderInstance* iLBCdec_inst) {
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WebRtcIlbcfix_InitDecode((IlbcDecoder*) iLBCdec_inst, 20, 1);
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}
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void WebRtcIlbcfix_Decoderinit30Ms(IlbcDecoderInstance* iLBCdec_inst) {
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WebRtcIlbcfix_InitDecode((IlbcDecoder*) iLBCdec_inst, 30, 1);
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}
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int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType)
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{
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size_t 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==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==3*((IlbcDecoder*)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 (((IlbcDecoder*)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(
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((IlbcDecoder*)iLBCdec_inst), 30,
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((IlbcDecoder*)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(
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((IlbcDecoder*)iLBCdec_inst), 20,
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((IlbcDecoder*)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*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
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if (WebRtcIlbcfix_DecodeImpl(
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&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
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(const uint16_t*)&encoded
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[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
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(IlbcDecoder*)iLBCdec_inst, 1) == -1)
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return -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 (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
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}
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int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType)
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{
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size_t i=0;
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if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==3*((IlbcDecoder*)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*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
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if (!WebRtcIlbcfix_DecodeImpl(
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&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
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(const uint16_t*)&encoded
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[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
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(IlbcDecoder*)iLBCdec_inst, 1))
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return -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 (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
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}
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int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType)
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{
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size_t i=0;
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if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
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(len==3*((IlbcDecoder*)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*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
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if (!WebRtcIlbcfix_DecodeImpl(
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&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
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(const uint16_t*)&encoded
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[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
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(IlbcDecoder*)iLBCdec_inst, 1))
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return -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 (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
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}
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size_t WebRtcIlbcfix_DecodePlc(IlbcDecoderInstance* iLBCdec_inst,
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int16_t* decoded,
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size_t noOfLostFrames) {
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size_t i;
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uint16_t dummy;
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for (i=0;i<noOfLostFrames;i++) {
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// PLC decoding shouldn't fail, because there is no external input data
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// that can be bad.
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RTC_CHECK(WebRtcIlbcfix_DecodeImpl(
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&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl], &dummy,
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(IlbcDecoder*)iLBCdec_inst, 0));
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}
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return (noOfLostFrames*((IlbcDecoder*)iLBCdec_inst)->blockl);
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}
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size_t WebRtcIlbcfix_NetEqPlc(IlbcDecoderInstance* iLBCdec_inst,
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int16_t* decoded,
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size_t noOfLostFrames) {
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/* Two input parameters not used, but needed for function pointers in NetEQ */
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(void)(decoded = NULL);
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(void)(noOfLostFrames = 0);
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WebRtcSpl_MemSetW16(((IlbcDecoder*)iLBCdec_inst)->enh_buf, 0, ENH_BUFL);
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((IlbcDecoder*)iLBCdec_inst)->prev_enh_pl = 2;
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return (0);
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}
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void WebRtcIlbcfix_version(char *version)
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{
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strcpy((char*)version, "1.1.1");
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}
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