/* * 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. */ #include "acm_common_defs.h" #include "acm_neteq.h" #include "acm_opus.h" #include "trace.h" #include "webrtc_neteq.h" #include "webrtc_neteq_help_macros.h" #ifdef WEBRTC_CODEC_OPUS // NOTE! Opus is not included in the open-source package. Modify this file or your codec // API to match the function call and name of used Opus API file. // #include "opus_interface.h" #endif namespace webrtc { #ifndef WEBRTC_CODEC_OPUS ACMOPUS::ACMOPUS( WebRtc_Word16 /* codecID */) { return; } ACMOPUS::~ACMOPUS() { return; } WebRtc_Word16 ACMOPUS::InternalEncode( WebRtc_UWord8* /* bitStream */, WebRtc_Word16* /* bitStreamLenByte */) { return -1; } WebRtc_Word16 ACMOPUS::DecodeSafe( WebRtc_UWord8* /* bitStream */, WebRtc_Word16 /* bitStreamLenByte */, WebRtc_Word16* /* audio */, WebRtc_Word16* /* audioSamples */, WebRtc_Word8* /* speechType */) { return -1; } WebRtc_Word16 ACMOPUS::InternalInitEncoder( WebRtcACMCodecParams* /* codecParams */) { return -1; } WebRtc_Word16 ACMOPUS::InternalInitDecoder( WebRtcACMCodecParams* /* codecParams */) { return -1; } WebRtc_Word32 ACMOPUS::CodecDef( WebRtcNetEQ_CodecDef& /* codecDef */, const CodecInst& /* codecInst */) { return -1; } ACMGenericCodec* ACMOPUS::CreateInstance(void) { return NULL; } WebRtc_Word16 ACMOPUS::InternalCreateEncoder() { return -1; } void ACMOPUS::DestructEncoderSafe() { return; } WebRtc_Word16 ACMOPUS::InternalCreateDecoder() { return -1; } void ACMOPUS::DestructDecoderSafe() { return; } void ACMOPUS::InternalDestructEncoderInst( void* /* ptrInst */) { return; } WebRtc_Word16 ACMOPUS::UnregisterFromNetEqSafe( ACMNetEQ* /* netEq */, WebRtc_Word16 /* payloadType */) { return -1; } WebRtc_Word16 ACMOPUS::SetBitRateSafe( const WebRtc_Word32 /*rate*/ ) { return -1; } #else //===================== Actual Implementation ======================= // Remove when integrating a real Opus wrapper extern WebRtc_Word16 WebRtcOpus_CreateEnc(OPUS_inst_t_** inst, WebRtc_Word16 samplFreq); extern WebRtc_Word16 WebRtcOpus_CreateDec(OPUS_inst_t_** inst, WebRtc_Word16 samplFreq); extern WebRtc_Word16 WebRtcOpus_FreeEnc(OPUS_inst_t_* inst); extern WebRtc_Word16 WebRtcOpus_FreeDec(OPUS_inst_t_* inst); extern WebRtc_Word16 WebRtcOpus_Encode(OPUS_inst_t_* encInst, WebRtc_Word16* input, WebRtc_Word16* output, WebRtc_Word16 len, WebRtc_Word16 byteLen); extern WebRtc_Word16 WebRtcOpus_EncoderInit(OPUS_inst_t_* encInst, WebRtc_Word16 samplFreq, WebRtc_Word16 mode, WebRtc_Word16 vbrFlag); extern WebRtc_Word16 WebRtcOpus_Decode(OPUS_inst_t_* decInst); extern WebRtc_Word16 WebRtcOpus_DecodeBwe(OPUS_inst_t_* decInst, WebRtc_Word16* input); extern WebRtc_Word16 WebRtcOpus_DecodePlc(OPUS_inst_t_* decInst); extern WebRtc_Word16 WebRtcOpus_DecoderInit(OPUS_inst_t_* decInst); ACMOPUS::ACMOPUS( WebRtc_Word16 codecID): _encoderInstPtr(NULL), _decoderInstPtr(NULL), _opusMode(1), // default mode is the hybrid mode _flagVBR(0) // default VBR off { _codecID = codecID; // Current implementation doesn't have DTX. That might change. _hasInternalDTX = false; // Default sampling frequency _mySampFreq = 48000; // default rate _myRate = 50000; return; } ACMOPUS::~ACMOPUS() { if(_encoderInstPtr != NULL) { WebRtcOpus_FreeEnc(_encoderInstPtr); _encoderInstPtr = NULL; } if(_decoderInstPtr != NULL) { WebRtcOpus_FreeDec(_decoderInstPtr); _decoderInstPtr = NULL; } return; } WebRtc_Word16 ACMOPUS::InternalEncode( WebRtc_UWord8* bitStream, WebRtc_Word16* bitStreamLenByte) { WebRtc_Word16 noEncodedSamples = 0; WebRtc_Word16 tmpLenByte = 0; *bitStreamLenByte = 0; WebRtc_Word16 byteLengthFrame = 0; // Derive what byte-length is requested byteLengthFrame = _myRate*_frameLenSmpl/(8*_mySampFreq); // Call Encoder *bitStreamLenByte = WebRtcOpus_Encode(_encoderInstPtr, &_inAudio[_inAudioIxRead], (WebRtc_Word16*)bitStream, _frameLenSmpl, byteLengthFrame); // increment the read index this tell the caller that how far // we have gone forward in reading the audio buffer _inAudioIxRead += _frameLenSmpl; // sanity check if(*bitStreamLenByte < 0) { // error has happened WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "InternalEncode: Encode error for Opus"); *bitStreamLenByte = 0; return -1; } return *bitStreamLenByte; } WebRtc_Word16 ACMOPUS::DecodeSafe( WebRtc_UWord8* /* bitStream */, WebRtc_Word16 /* bitStreamLenByte */, WebRtc_Word16* /* audio */, WebRtc_Word16* /* audioSamples */, WebRtc_Word8* /* speechType */) { return 0; } WebRtc_Word16 ACMOPUS::InternalInitEncoder( WebRtcACMCodecParams* codecParams) { //set the bit rate and initialize _myRate = codecParams->codecInstant.rate; return SetBitRateSafe( (WebRtc_UWord32)_myRate); } WebRtc_Word16 ACMOPUS::InternalInitDecoder( WebRtcACMCodecParams* /* codecParams */) { if (WebRtcOpus_DecoderInit(_decoderInstPtr) < 0) { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "InternalInitDecoder: init decoder failed for Opus"); return -1; } return 0; } WebRtc_Word32 ACMOPUS::CodecDef( WebRtcNetEQ_CodecDef& codecDef, const CodecInst& codecInst) { if (!_decoderInitialized) { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "CodeDef: Decoder uninitialized for Opus"); return -1; } // Fill up the structure by calling // "SET_CODEC_PAR" & "SET_G729_FUNCTION." // Then call NetEQ to add the codec to it's // database. SET_CODEC_PAR((codecDef), kDecoderOpus, codecInst.pltype, _decoderInstPtr, 16000); SET_OPUS_FUNCTIONS((codecDef)); return 0; } ACMGenericCodec* ACMOPUS::CreateInstance(void) { return NULL; } WebRtc_Word16 ACMOPUS::InternalCreateEncoder() { if (WebRtcOpus_CreateEnc(&_encoderInstPtr, _mySampFreq) < 0) { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "InternalCreateEncoder: create encoder failed for Opus"); return -1; } return 0; } void ACMOPUS::DestructEncoderSafe() { _encoderExist = false; _encoderInitialized = false; if(_encoderInstPtr != NULL) { WebRtcOpus_FreeEnc(_encoderInstPtr); _encoderInstPtr = NULL; } } WebRtc_Word16 ACMOPUS::InternalCreateDecoder() { if (WebRtcOpus_CreateDec(&_decoderInstPtr, _mySampFreq) < 0) { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "InternalCreateDecoder: create decoder failed for Opus"); return -1; } return 0; } void ACMOPUS::DestructDecoderSafe() { _decoderExist = false; _decoderInitialized = false; if(_decoderInstPtr != NULL) { WebRtcOpus_FreeDec(_decoderInstPtr); _decoderInstPtr = NULL; } } void ACMOPUS::InternalDestructEncoderInst( void* ptrInst) { if(ptrInst != NULL) { WebRtcOpus_FreeEnc((OPUS_inst_t*)ptrInst); } return; } WebRtc_Word16 ACMOPUS::UnregisterFromNetEqSafe( ACMNetEQ* netEq, WebRtc_Word16 payloadType) { if(payloadType != _decoderParams.codecInstant.pltype) { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "Cannot unregister codec: given payload-type does not match \ the stored payload type", _decoderParams.codecInstant.plname, payloadType, _decoderParams.codecInstant.pltype); return -1; } return netEq->RemoveCodec(kDecoderOpus); } WebRtc_Word16 ACMOPUS::SetBitRateSafe( const WebRtc_Word32 rate) { //allowed rates: {8000, 12000, 14000, 16000, 18000, 20000, // 22000, 24000, 26000, 28000, 30000, 32000}; switch(rate) { case 8000: { _myRate = 8000; break; } case 12000: { _myRate = 12000; break; } case 14000: { _myRate = 14000; break; } case 16000: { _myRate = 16000; break; } case 18000: { _myRate = 18000; break; } case 20000: { _myRate = 20000; break; } case 22000: { _myRate = 22000; break; } case 24000: { _myRate = 24000; break; } case 26000: { _myRate = 26000; break; } case 28000: { _myRate = 28000; break; } case 30000: { _myRate = 30000; break; } case 32000: { _myRate = 32000; break; } default: { WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID, "SetBitRateSafe: Invalid rate Opus"); return -1; break; } } // Re-init with new rate if (WebRtcOpus_EncoderInit(_encoderInstPtr, _mySampFreq, _opusMode, _flagVBR) >= 0) { _encoderParams.codecInstant.rate = _myRate; return 0; } else { return -1; } } #endif } // namespace webrtc