/*
 *  Copyright (c) 2012 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_gsmfr.h"
#include "acm_common_defs.h"
#include "acm_neteq.h"
#include "trace.h"
#include "webrtc_neteq.h"
#include "webrtc_neteq_help_macros.h"

#ifdef WEBRTC_CODEC_GSMFR
// NOTE! GSM-FR is not included in the open-source package. Modify this file
// or your codec API to match the function calls and names of used GSM-FR API
// file.
#include "gsmfr_interface.h"
#endif

namespace webrtc {

#ifndef WEBRTC_CODEC_GSMFR

ACMGSMFR::ACMGSMFR(WebRtc_Word16 /* codecID */)
    : _encoderInstPtr(NULL),
      _decoderInstPtr(NULL) {
  return;
}

ACMGSMFR::~ACMGSMFR() {
  return;
}

WebRtc_Word16 ACMGSMFR::InternalEncode(WebRtc_UWord8* /* bitStream */,
                                       WebRtc_Word16* /* bitStreamLenByte */) {
  return -1;
}

WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
                                   WebRtc_Word16 /* bitStreamLenByte */,
                                   WebRtc_Word16* /* audio */,
                                   WebRtc_Word16* /* audioSamples */,
                                   WebRtc_Word8* /* speechType */) {
  return -1;
}

WebRtc_Word16 ACMGSMFR::EnableDTX() {
  return -1;
}

WebRtc_Word16 ACMGSMFR::DisableDTX() {
  return -1;
}

WebRtc_Word16 ACMGSMFR::InternalInitEncoder(
    WebRtcACMCodecParams* /* codecParams */) {
  return -1;
}

WebRtc_Word16 ACMGSMFR::InternalInitDecoder(
    WebRtcACMCodecParams* /* codecParams */) {
  return -1;
}

WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
                                 const CodecInst& /* codecInst */) {
  return -1;
}

ACMGenericCodec* ACMGSMFR::CreateInstance(void) {
  return NULL;
}

WebRtc_Word16 ACMGSMFR::InternalCreateEncoder() {
  return -1;
}

void ACMGSMFR::DestructEncoderSafe() {
  return;
}

WebRtc_Word16 ACMGSMFR::InternalCreateDecoder() {
  return -1;
}

void ACMGSMFR::DestructDecoderSafe() {
  return;
}

void ACMGSMFR::InternalDestructEncoderInst(void* /* ptrInst */) {
  return;
}

#else     //===================== Actual Implementation =======================

ACMGSMFR::ACMGSMFR(WebRtc_Word16 codecID)
    : _encoderInstPtr(NULL),
      _decoderInstPtr(NULL) {
  _codecID = codecID;
  _hasInternalDTX = true;
  return;
}

ACMGSMFR::~ACMGSMFR() {
  if (_encoderInstPtr != NULL) {
    WebRtcGSMFR_FreeEnc(_encoderInstPtr);
    _encoderInstPtr = NULL;
  }
  if (_decoderInstPtr != NULL) {
    WebRtcGSMFR_FreeDec(_decoderInstPtr);
    _decoderInstPtr = NULL;
  }
  return;
}

WebRtc_Word16 ACMGSMFR::InternalEncode(WebRtc_UWord8* bitStream,
                                       WebRtc_Word16* bitStreamLenByte) {
  *bitStreamLenByte = WebRtcGSMFR_Encode(_encoderInstPtr,
                                         &_inAudio[_inAudioIxRead],
                                         _frameLenSmpl,
                                         (WebRtc_Word16*) bitStream);
  // increment the read index this tell the caller that how far
  // we have gone forward in reading the audio buffer
  _inAudioIxRead += _frameLenSmpl;
  return *bitStreamLenByte;
}

WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
                                   WebRtc_Word16 /* bitStreamLenByte */,
                                   WebRtc_Word16* /* audio */,
                                   WebRtc_Word16* /* audioSamples */,
                                   WebRtc_Word8* /* speechType */) {
  return 0;
}

WebRtc_Word16 ACMGSMFR::EnableDTX() {
  if (_dtxEnabled) {
    return 0;
  } else if (_encoderExist) {
    if (WebRtcGSMFR_EncoderInit(_encoderInstPtr, 1) < 0) {
      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
                   "EnableDTX: cannot init encoder for GSMFR");
      return -1;
    }
    _dtxEnabled = true;
    return 0;
  } else {
    return -1;
  }
}

WebRtc_Word16 ACMGSMFR::DisableDTX() {
  if (!_dtxEnabled) {
    return 0;
  } else if (_encoderExist) {
    if (WebRtcGSMFR_EncoderInit(_encoderInstPtr, 0) < 0) {
      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
                   "DisableDTX: cannot init encoder for GSMFR");
      return -1;
    }
    _dtxEnabled = false;
    return 0;
  } else {
    // encoder doesn't exists, therefore disabling is harmless
    return 0;
  }
}

WebRtc_Word16 ACMGSMFR::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
  if (WebRtcGSMFR_EncoderInit(_encoderInstPtr,
                              ((codecParams->enableDTX) ? 1 : 0)) < 0) {
    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
                 "InternalInitEncoder: cannot init encoder for GSMFR");
  }
  return 0;
}

WebRtc_Word16 ACMGSMFR::InternalInitDecoder(
    WebRtcACMCodecParams* /* codecParams */) {
  if (WebRtcGSMFR_DecoderInit(_decoderInstPtr) < 0) {
    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
                 "InternalInitDecoder: cannot init decoder for GSMFR");
    return -1;
  }
  return 0;
}

WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
                                 const CodecInst& codecInst) {
  if (!_decoderInitialized) {
    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
                 "CodecDef: decoder is not initialized for GSMFR");
    return -1;
  }
  // Fill up the structure by calling
  // "SET_CODEC_PAR" & "SET_GSMFR_FUNCTION."
  // Then call NetEQ to add the codec to it's
  // database.
  SET_CODEC_PAR((codecDef), kDecoderGSMFR, codecInst.pltype, _decoderInstPtr,
                8000);
  SET_GSMFR_FUNCTIONS((codecDef));
  return 0;
}

ACMGenericCodec* ACMGSMFR::CreateInstance(void) {
  return NULL;
}

WebRtc_Word16 ACMGSMFR::InternalCreateEncoder() {
  if (WebRtcGSMFR_CreateEnc(&_encoderInstPtr) < 0) {
    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
        "InternalCreateEncoder: cannot create instance for GSMFR encoder");
    return -1;
  }
  return 0;
}

void ACMGSMFR::DestructEncoderSafe() {
  if (_encoderInstPtr != NULL) {
    WebRtcGSMFR_FreeEnc(_encoderInstPtr);
    _encoderInstPtr = NULL;
  }
  _encoderExist = false;
  _encoderInitialized = false;
}

WebRtc_Word16 ACMGSMFR::InternalCreateDecoder() {
  if (WebRtcGSMFR_CreateDec(&_decoderInstPtr) < 0) {
    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
        "InternalCreateDecoder: cannot create instance for GSMFR decoder");
    return -1;
  }
  return 0;
}

void ACMGSMFR::DestructDecoderSafe() {
  if (_decoderInstPtr != NULL) {
    WebRtcGSMFR_FreeDec(_decoderInstPtr);
    _decoderInstPtr = NULL;
  }
  _decoderExist = false;
  _decoderInitialized = false;
}

void ACMGSMFR::InternalDestructEncoderInst(void* ptrInst) {
  if (ptrInst != NULL) {
    WebRtcGSMFR_FreeEnc((GSMFR_encinst_t_*) ptrInst);
  }
  return;
}

#endif

}  // namespace webrtc