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/*
* 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 "webrtc/modules/audio_coding/main/acm2/acm_amrwb.h"
#ifdef WEBRTC_CODEC_AMRWB
// NOTE! GSM AMR-wb is not included in the open-source package. The
// following interface file is needed:
#include "webrtc/modules/audio_coding/main/codecs/amrwb/interface/amrwb_interface.h"
#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
#include "webrtc/system_wrappers/interface/trace.h"
// The API in the header file should match the one below.
//
// int16_t WebRtcAmrWb_CreateEnc(AMRWB_encinst_t_** enc_inst);
// int16_t WebRtcAmrWb_CreateDec(AMRWB_decinst_t_** dec_inst);
// int16_t WebRtcAmrWb_FreeEnc(AMRWB_encinst_t_* enc_inst);
// int16_t WebRtcAmrWb_FreeDec(AMRWB_decinst_t_* dec_inst);
// int16_t WebRtcAmrWb_Encode(AMRWB_encinst_t_* enc_inst, int16_t* input,
// int16_t len, int16_t* output, int16_t mode);
// int16_t WebRtcAmrWb_EncoderInit(AMRWB_encinst_t_* enc_inst,
// int16_t dtx_mode);
// int16_t WebRtcAmrWb_EncodeBitmode(AMRWB_encinst_t_* enc_inst,
// int format);
// int16_t WebRtcAmrWb_Decode(AMRWB_decinst_t_* dec_inst);
// int16_t WebRtcAmrWb_DecodePlc(AMRWB_decinst_t_* dec_inst);
// int16_t WebRtcAmrWb_DecoderInit(AMRWB_decinst_t_* dec_inst);
// int16_t WebRtcAmrWb_DecodeBitmode(AMRWB_decinst_t_* dec_inst,
// int format);
#endif
namespace webrtc {
namespace acm2 {
#ifndef WEBRTC_CODEC_AMRWB
ACMAMRwb::ACMAMRwb(int16_t /* codec_id */)
: encoder_inst_ptr_(NULL),
encoding_mode_(-1), // invalid value
encoding_rate_(0), // invalid value
encoder_packing_format_(AMRBandwidthEfficient) {}
ACMAMRwb::~ACMAMRwb() {}
int16_t ACMAMRwb::InternalEncode(uint8_t* /* bitstream */,
int16_t* /* bitstream_len_byte */) {
return -1;
}
int16_t ACMAMRwb::EnableDTX() { return -1; }
int16_t ACMAMRwb::DisableDTX() { return -1; }
int16_t ACMAMRwb::InternalInitEncoder(
WebRtcACMCodecParams* /* codec_params */) {
return -1;
}
ACMGenericCodec* ACMAMRwb::CreateInstance(void) { return NULL; }
int16_t ACMAMRwb::InternalCreateEncoder() { return -1; }
void ACMAMRwb::DestructEncoderSafe() { return; }
int16_t ACMAMRwb::SetBitRateSafe(const int32_t /* rate */) { return -1; }
int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat(
ACMAMRPackingFormat /* packing_format */) {
return -1;
}
ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const {
return AMRUndefined;
}
int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat(
ACMAMRPackingFormat /* packing_format */) {
return -1;
}
ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const {
return AMRUndefined;
}
#else //===================== Actual Implementation =======================
#define AMRWB_MODE_7k 0
#define AMRWB_MODE_9k 1
#define AMRWB_MODE_12k 2
#define AMRWB_MODE_14k 3
#define AMRWB_MODE_16k 4
#define AMRWB_MODE_18k 5
#define AMRWB_MODE_20k 6
#define AMRWB_MODE_23k 7
#define AMRWB_MODE_24k 8
ACMAMRwb::ACMAMRwb(int16_t codec_id)
: encoder_inst_ptr_(NULL),
encoding_mode_(-1), // invalid value
encoding_rate_(0) { // invalid value
codec_id_ = codec_id;
has_internal_dtx_ = true;
encoder_packing_format_ = AMRBandwidthEfficient;
return;
}
ACMAMRwb::~ACMAMRwb() {
if (encoder_inst_ptr_ != NULL) {
WebRtcAmrWb_FreeEnc(encoder_inst_ptr_);
encoder_inst_ptr_ = NULL;
}
return;
}
int16_t ACMAMRwb::InternalEncode(uint8_t* bitstream,
int16_t* bitstream_len_byte) {
int16_t vad_decision = 1;
// sanity check, if the rate is set correctly. we might skip this
// sanity check. if rate is not set correctly, initialization flag
// should be false and should not be here.
if ((encoding_mode_ < AMRWB_MODE_7k) || (encoding_mode_ > AMRWB_MODE_24k)) {
*bitstream_len_byte = 0;
return -1;
}
*bitstream_len_byte = WebRtcAmrWb_Encode(
encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_,
reinterpret_cast<int16_t*>(bitstream), encoding_mode_);
// Update VAD, if internal DTX is used
if (has_internal_dtx_ && dtx_enabled_) {
if (*bitstream_len_byte <= (7 * frame_len_smpl_ / 160)) {
vad_decision = 0;
}
for (int16_t n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
vad_label_[n] = vad_decision;
}
}
// increment the read index this tell the caller that how far
// we have gone forward in reading the audio buffer
in_audio_ix_read_ += frame_len_smpl_;
return *bitstream_len_byte;
}
int16_t ACMAMRwb::EnableDTX() {
if (dtx_enabled_) {
return 0;
} else if (encoder_exist_) { // check if encoder exist
// enable DTX
if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 1) < 0) {
return -1;
}
dtx_enabled_ = true;
return 0;
} else {
return -1;
}
}
int16_t ACMAMRwb::DisableDTX() {
if (!dtx_enabled_) {
return 0;
} else if (encoder_exist_) { // check if encoder exist
// disable DTX
if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 0) < 0) {
return -1;
}
dtx_enabled_ = false;
return 0;
} else {
// encoder doesn't exists, therefore disabling is harmless
return 0;
}
}
int16_t ACMAMRwb::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
// sanity check
if (encoder_inst_ptr_ == NULL) {
return -1;
}
int16_t status = SetBitRateSafe((codec_params->codec_inst).rate);
status += (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_,
((codec_params->enable_dtx) ? 1 : 0)) < 0)
? -1
: 0;
status += (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_,
encoder_packing_format_) < 0)
? -1
: 0;
return (status < 0) ? -1 : 0;
}
ACMGenericCodec* ACMAMRwb::CreateInstance(void) { return NULL; }
int16_t ACMAMRwb::InternalCreateEncoder() {
return WebRtcAmrWb_CreateEnc(&encoder_inst_ptr_);
}
void ACMAMRwb::DestructEncoderSafe() {
if (encoder_inst_ptr_ != NULL) {
WebRtcAmrWb_FreeEnc(encoder_inst_ptr_);
encoder_inst_ptr_ = NULL;
}
// there is no encoder set the following
encoder_exist_ = false;
encoder_initialized_ = false;
encoding_mode_ = -1; // invalid value
encoding_rate_ = 0;
}
int16_t ACMAMRwb::SetBitRateSafe(const int32_t rate) {
switch (rate) {
case 7000: {
encoding_mode_ = AMRWB_MODE_7k;
encoding_rate_ = 7000;
break;
}
case 9000: {
encoding_mode_ = AMRWB_MODE_9k;
encoding_rate_ = 9000;
break;
}
case 12000: {
encoding_mode_ = AMRWB_MODE_12k;
encoding_rate_ = 12000;
break;
}
case 14000: {
encoding_mode_ = AMRWB_MODE_14k;
encoding_rate_ = 14000;
break;
}
case 16000: {
encoding_mode_ = AMRWB_MODE_16k;
encoding_rate_ = 16000;
break;
}
case 18000: {
encoding_mode_ = AMRWB_MODE_18k;
encoding_rate_ = 18000;
break;
}
case 20000: {
encoding_mode_ = AMRWB_MODE_20k;
encoding_rate_ = 20000;
break;
}
case 23000: {
encoding_mode_ = AMRWB_MODE_23k;
encoding_rate_ = 23000;
break;
}
case 24000: {
encoding_mode_ = AMRWB_MODE_24k;
encoding_rate_ = 24000;
break;
}
default: {
return -1;
}
}
return 0;
}
int16_t ACMAMRwb::SetAMRwbEncoderPackingFormat(
ACMAMRPackingFormat packing_format) {
if ((packing_format != AMRBandwidthEfficient) &&
(packing_format != AMROctetAlligned) &&
(packing_format != AMRFileStorage)) {
WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
"Invalid AMRwb encoder packing-format.");
return -1;
} else {
if (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) {
return -1;
} else {
encoder_packing_format_ = packing_format;
return 0;
}
}
}
ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const {
return encoder_packing_format_;
}
int16_t ACMAMRwb::SetAMRwbDecoderPackingFormat(
ACMAMRPackingFormat packing_format) {
// Not implemented.
return -1;
}
ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const {
// Not implemented.
return AMRUndefined;
}
#endif
} // namespace acm2
} // namespace webrtc