593 lines
12 KiB
C++
593 lines
12 KiB
C++
/*
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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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#include "acm_amr.h"
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#include "acm_common_defs.h"
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#include "acm_neteq.h"
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#include "audio_coding_module_typedefs.h"
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#include "rw_lock_wrapper.h"
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#include "trace.h"
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#include "webrtc_neteq.h"
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#include "webrtc_neteq_help_macros.h"
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#ifdef WEBRTC_CODEC_AMR
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// NOTE! GSM AMR is not included in the open-source package. Modify this file or your codec
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// API to match the function call and name of used AMR API file.
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// #include "amr_interface.h"
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#endif
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namespace webrtc
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{
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#ifndef WEBRTC_CODEC_AMR
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ACMAMR::ACMAMR(WebRtc_Word16 /* codecID */)
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{
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return;
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}
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ACMAMR::~ACMAMR()
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{
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return;
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}
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WebRtc_Word16
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ACMAMR::InternalEncode(
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WebRtc_UWord8* /* bitStream */,
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WebRtc_Word16* /* bitStreamLenByte */)
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{
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return -1;
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}
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WebRtc_Word16
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ACMAMR::DecodeSafe(
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WebRtc_UWord8* /* bitStream */,
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WebRtc_Word16 /* bitStreamLenByte */,
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WebRtc_Word16* /* audio */,
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WebRtc_Word16* /* audioSamples */,
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WebRtc_Word8* /* speechType */)
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{
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return -1;
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}
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WebRtc_Word16
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ACMAMR::EnableDTX()
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{
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return -1;
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}
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WebRtc_Word16
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ACMAMR::DisableDTX()
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{
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return -1;
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}
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WebRtc_Word16
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ACMAMR::InternalInitEncoder(
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WebRtcACMCodecParams* /* codecParams */)
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{
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return -1;
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}
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WebRtc_Word16
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ACMAMR::InternalInitDecoder(
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WebRtcACMCodecParams* /* codecParams */)
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{
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return -1;
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}
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WebRtc_Word32
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ACMAMR::CodecDef(
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WebRtcNetEQ_CodecDef& /* codecDef */,
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const CodecInst& /* codecInst */)
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{
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return -1;
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}
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ACMGenericCodec*
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ACMAMR::CreateInstance(void)
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{
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return NULL;
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}
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WebRtc_Word16
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ACMAMR::InternalCreateEncoder()
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{
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return -1;
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}
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void
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ACMAMR::DestructEncoderSafe()
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{
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return;
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}
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WebRtc_Word16
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ACMAMR::InternalCreateDecoder()
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{
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return -1;
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}
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void
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ACMAMR::DestructDecoderSafe()
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{
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return;
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}
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WebRtc_Word16
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ACMAMR::SetBitRateSafe(
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const WebRtc_Word32 /* rate */)
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{
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return -1;
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}
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void
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ACMAMR::InternalDestructEncoderInst(
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void* /* ptrInst */)
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{
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return;
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}
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WebRtc_Word16
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ACMAMR::SetAMREncoderPackingFormat(
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ACMAMRPackingFormat /* packingFormat */)
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{
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return -1;
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}
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ACMAMRPackingFormat
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ACMAMR::AMREncoderPackingFormat() const
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{
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return AMRUndefined;
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}
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WebRtc_Word16
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ACMAMR::SetAMRDecoderPackingFormat(
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ACMAMRPackingFormat /* packingFormat */)
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{
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return -1;
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}
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ACMAMRPackingFormat
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ACMAMR::AMRDecoderPackingFormat() const
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{
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return AMRUndefined;
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}
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WebRtc_Word16
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ACMAMR::UnregisterFromNetEqSafe(
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ACMNetEQ* /* netEq */,
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WebRtc_Word16 /* payloadType */)
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{
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return -1;
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}
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#else //===================== Actual Implementation =======================
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#define WEBRTC_AMR_MR475 0
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#define WEBRTC_AMR_MR515 1
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#define WEBRTC_AMR_MR59 2
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#define WEBRTC_AMR_MR67 3
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#define WEBRTC_AMR_MR74 4
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#define WEBRTC_AMR_MR795 5
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#define WEBRTC_AMR_MR102 6
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#define WEBRTC_AMR_MR122 7
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// Remove when integrating a real GSM AMR wrapper
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extern WebRtc_Word16 WebRtcAmr_CreateEnc(AMR_encinst_t_** encInst);
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extern WebRtc_Word16 WebRtcAmr_CreateDec(AMR_decinst_t_** decInst);
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extern WebRtc_Word16 WebRtcAmr_FreeEnc(AMR_encinst_t_* encInst);
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extern WebRtc_Word16 WebRtcAmr_FreeDec(AMR_decinst_t_* decInst);
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extern WebRtc_Word16 WebRtcAmr_Encode(AMR_encinst_t_* encInst,
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WebRtc_Word16* input,
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WebRtc_Word16 len,
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WebRtc_Word16*output,
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WebRtc_Word16 mode);
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extern WebRtc_Word16 WebRtcAmr_EncoderInit(AMR_encinst_t_* encInst,
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WebRtc_Word16 dtxMode);
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extern WebRtc_Word16 WebRtcAmr_EncodeBitmode(AMR_encinst_t_* encInst,
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ACMAMRPackingFormat format);
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extern WebRtc_Word16 WebRtcAmr_Decode(AMR_decinst_t_* decInst);
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extern WebRtc_Word16 WebRtcAmr_DecodePlc(AMR_decinst_t_* decInst);
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extern WebRtc_Word16 WebRtcAmr_DecoderInit(AMR_decinst_t_* decInst);
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extern WebRtc_Word16 WebRtcAmr_DecodeBitmode(AMR_decinst_t_* decInst,
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ACMAMRPackingFormat format);
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ACMAMR::ACMAMR(WebRtc_Word16 codecID):
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_encoderInstPtr(NULL),
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_decoderInstPtr(NULL),
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_encodingMode(-1), // invalid value
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_encodingRate(0) // invalid value
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{
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_codecID = codecID;
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_hasInternalDTX = true;
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_encoderPackingFormat = AMRBandwidthEfficient;
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_decoderPackingFormat = AMRBandwidthEfficient;
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return;
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}
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ACMAMR::~ACMAMR()
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{
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if(_encoderInstPtr != NULL)
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{
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WebRtcAmr_FreeEnc(_encoderInstPtr);
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_encoderInstPtr = NULL;
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}
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if(_decoderInstPtr != NULL)
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{
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WebRtcAmr_FreeDec(_decoderInstPtr);
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_decoderInstPtr = NULL;
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}
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return;
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}
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WebRtc_Word16
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ACMAMR::InternalEncode(
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WebRtc_UWord8* bitStream,
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WebRtc_Word16* bitStreamLenByte)
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{
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WebRtc_Word16 vadDecision = 1;
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// sanity check, if the rate is set correctly. we might skip this
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// sanity check. if rate is not set correctly, initialization flag
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// should be false and should not be here.
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if((_encodingMode < WEBRTC_AMR_MR475) || (_encodingMode > WEBRTC_AMR_MR122))
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{
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*bitStreamLenByte = 0;
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return -1;
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}
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*bitStreamLenByte = WebRtcAmr_Encode(_encoderInstPtr,
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&_inAudio[_inAudioIxRead], _frameLenSmpl, (WebRtc_Word16*)bitStream,
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_encodingMode);
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// Update VAD, if internal DTX is used
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if(_hasInternalDTX && _dtxEnabled)
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{
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if(*bitStreamLenByte <= (7*_frameLenSmpl/160))
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{
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vadDecision = 0;
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}
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for(WebRtc_Word16 n = 0; n < MAX_FRAME_SIZE_10MSEC; n++)
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{
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_vadLabel[n] = vadDecision;
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}
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}
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// increment the read index
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_inAudioIxRead += _frameLenSmpl;
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return *bitStreamLenByte;
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}
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WebRtc_Word16
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ACMAMR::DecodeSafe(
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WebRtc_UWord8* /* bitStream */,
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WebRtc_Word16 /* bitStreamLenByte */,
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WebRtc_Word16* /* audio */,
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WebRtc_Word16* /* audioSamples */,
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WebRtc_Word8* /* speechType */)
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{
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return 0;
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}
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WebRtc_Word16
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ACMAMR::EnableDTX()
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{
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if(_dtxEnabled)
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{
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return 0;
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}
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else if(_encoderExist) // check if encoder exist
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{
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// enable DTX
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if(WebRtcAmr_EncoderInit(_encoderInstPtr, 1) < 0)
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{
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return -1;
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}
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_dtxEnabled = true;
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return 0;
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}
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else
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{
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return -1;
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}
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}
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WebRtc_Word16
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ACMAMR::DisableDTX()
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{
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if(!_dtxEnabled)
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{
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return 0;
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}
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else if(_encoderExist) // check if encoder exist
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{
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// disable DTX
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if(WebRtcAmr_EncoderInit(_encoderInstPtr, 0) < 0)
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{
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return -1;
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}
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_dtxEnabled = false;
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return 0;
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}
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else
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{
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// encoder doesn't exists, therefore disabling is harmless
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return 0;
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}
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}
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WebRtc_Word16
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ACMAMR::InternalInitEncoder(
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WebRtcACMCodecParams* codecParams)
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{
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WebRtc_Word16 status = SetBitRateSafe((codecParams->codecInstant).rate);
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status += (WebRtcAmr_EncoderInit(_encoderInstPtr,
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((codecParams->enableDTX)? 1:0)) < 0)? -1:0;
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status += (WebRtcAmr_EncodeBitmode(_encoderInstPtr,
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_encoderPackingFormat ) < 0)? -1:0;
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return (status < 0)? -1:0;
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}
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WebRtc_Word16
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ACMAMR::InternalInitDecoder(
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WebRtcACMCodecParams* /* codecParams */)
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{
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WebRtc_Word16 status = (
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(WebRtcAmr_DecoderInit(_decoderInstPtr) < 0)? -1:0);
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status +=
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WebRtcAmr_DecodeBitmode(_decoderInstPtr, _decoderPackingFormat);
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return (status < 0)? -1:0;
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}
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WebRtc_Word32
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ACMAMR::CodecDef(
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WebRtcNetEQ_CodecDef& codecDef,
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const CodecInst& codecInst)
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{
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if (!_decoderInitialized)
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{
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// Todo:
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// log error
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return -1;
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}
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// Fill up the structure by calling
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// "SET_CODEC_PAR" & "SET_AMR_FUNCTION."
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// Then call NetEQ to add the codec to it's
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// database.
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SET_CODEC_PAR((codecDef), kDecoderAMR, codecInst.pltype,
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_decoderInstPtr, 8000);
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SET_AMR_FUNCTIONS((codecDef));
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return 0;
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}
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ACMGenericCodec*
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ACMAMR::CreateInstance(void)
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{
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return NULL;
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}
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WebRtc_Word16
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ACMAMR::InternalCreateEncoder()
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{
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return WebRtcAmr_CreateEnc(&_encoderInstPtr);
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}
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void
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ACMAMR::DestructEncoderSafe()
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{
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if(_encoderInstPtr != NULL)
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{
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WebRtcAmr_FreeEnc(_encoderInstPtr);
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_encoderInstPtr = NULL;
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}
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// there is no encoder set the following
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_encoderExist = false;
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_encoderInitialized = false;
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_encodingMode = -1; // invalid value
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_encodingRate = 0; // invalid value
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}
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WebRtc_Word16
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ACMAMR::InternalCreateDecoder()
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{
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return WebRtcAmr_CreateDec(&_decoderInstPtr);
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}
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void
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ACMAMR::DestructDecoderSafe()
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{
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if(_decoderInstPtr != NULL)
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{
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WebRtcAmr_FreeDec(_decoderInstPtr);
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_decoderInstPtr = NULL;
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}
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// there is no encoder instance set the followings
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_decoderExist = false;
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_decoderInitialized = false;
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}
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WebRtc_Word16
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ACMAMR::SetBitRateSafe(const WebRtc_Word32 rate)
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{
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switch(rate)
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{
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case 4750:
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_encodingMode = WEBRTC_AMR_MR475;
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_encodingRate = 4750;
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break;
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case 5150:
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_encodingMode = WEBRTC_AMR_MR515;
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_encodingRate = 5150;
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break;
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case 5900:
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_encodingMode = WEBRTC_AMR_MR59;
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_encodingRate = 5900;
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break;
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case 6700:
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_encodingMode = WEBRTC_AMR_MR67;
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_encodingRate = 6700;
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break;
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case 7400:
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_encodingMode = WEBRTC_AMR_MR74;
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_encodingRate = 7400;
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break;
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case 7950:
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_encodingMode = WEBRTC_AMR_MR795;
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_encodingRate = 7950;
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break;
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case 10200:
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_encodingMode = WEBRTC_AMR_MR102;
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_encodingRate = 10200;
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break;
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case 12200:
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_encodingMode = WEBRTC_AMR_MR122;
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_encodingRate = 12200;
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break;
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default:
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return -1;
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break;
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}
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return 0;
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}
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void
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ACMAMR::InternalDestructEncoderInst(
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void* ptrInst)
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{
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// Free the memory where ptrInst is pointing to
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if(ptrInst != NULL)
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{
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WebRtcAmr_FreeEnc((AMR_encinst_t_*)ptrInst);
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}
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return;
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}
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WebRtc_Word16
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ACMAMR::SetAMREncoderPackingFormat(
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ACMAMRPackingFormat packingFormat)
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{
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if((packingFormat != AMRBandwidthEfficient) &&
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(packingFormat != AMROctetAlligned) &&
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(packingFormat != AMRFileStorage))
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
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"Invalid AMR Encoder packing-format.");
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return -1;
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}
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else
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{
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if(WebRtcAmr_EncodeBitmode(_encoderInstPtr,
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packingFormat) < 0)
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{
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return -1;
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}
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else
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{
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_encoderPackingFormat = packingFormat;
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return 0;
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}
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}
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}
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ACMAMRPackingFormat
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ACMAMR::AMREncoderPackingFormat() const
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{
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return _encoderPackingFormat;
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}
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WebRtc_Word16
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ACMAMR::SetAMRDecoderPackingFormat(
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ACMAMRPackingFormat packingFormat)
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{
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if((packingFormat != AMRBandwidthEfficient) &&
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(packingFormat != AMROctetAlligned) &&
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(packingFormat != AMRFileStorage))
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
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"Invalid AMR decoder packing-format.");
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return -1;
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}
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else
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{
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if(WebRtcAmr_DecodeBitmode(_decoderInstPtr,
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packingFormat) < 0)
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{
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return -1;
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}
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else
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{
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_decoderPackingFormat = packingFormat;
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return 0;
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}
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}
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}
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ACMAMRPackingFormat
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ACMAMR::AMRDecoderPackingFormat() const
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{
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return _decoderPackingFormat;
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}
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WebRtc_Word16
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ACMAMR::UnregisterFromNetEqSafe(
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ACMNetEQ* netEq,
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WebRtc_Word16 payloadType)
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{
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if(payloadType != _decoderParams.codecInstant.pltype)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
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"Cannot unregister codec %s given payload-type %d does not match \
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the stored payload type",
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_decoderParams.codecInstant.plname,
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payloadType,
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_decoderParams.codecInstant.pltype);
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return -1;
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}
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return netEq->RemoveCodec(kDecoderAMR);
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}
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#endif
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}
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