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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_g722.h"
#ifdef WEBRTC_CODEC_G722
#include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
#include "webrtc/system_wrappers/interface/trace.h"
#endif
namespace webrtc {
namespace acm2 {
#ifndef WEBRTC_CODEC_G722
ACMG722::ACMG722(int16_t /* codec_id */)
: ptr_enc_str_(NULL),
encoder_inst_ptr_(NULL),
encoder_inst_ptr_right_(NULL) {}
ACMG722::~ACMG722() {}
int32_t ACMG722::Add10MsDataSafe(const uint32_t /* timestamp */,
const int16_t* /* data */,
const uint16_t /* length_smpl */,
const uint8_t /* audio_channel */) {
return -1;
}
int16_t ACMG722::InternalEncode(uint8_t* /* bitstream */,
int16_t* /* bitstream_len_byte */) {
return -1;
}
int16_t ACMG722::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
return -1;
}
ACMGenericCodec* ACMG722::CreateInstance(void) { return NULL; }
int16_t ACMG722::InternalCreateEncoder() { return -1; }
void ACMG722::DestructEncoderSafe() { return; }
#else //===================== Actual Implementation =======================
// Encoder and decoder memory
struct ACMG722EncStr {
G722EncInst* inst; // instance for left channel in case of stereo
G722EncInst* inst_right; // instance for right channel in case of stereo
};
struct ACMG722DecStr {
G722DecInst* inst; // instance for left channel in case of stereo
G722DecInst* inst_right; // instance for right channel in case of stereo
};
ACMG722::ACMG722(int16_t codec_id)
: encoder_inst_ptr_(NULL), encoder_inst_ptr_right_(NULL) {
ptr_enc_str_ = new ACMG722EncStr;
if (ptr_enc_str_ != NULL) {
ptr_enc_str_->inst = NULL;
ptr_enc_str_->inst_right = NULL;
}
codec_id_ = codec_id;
return;
}
ACMG722::~ACMG722() {
// Encoder
if (ptr_enc_str_ != NULL) {
if (ptr_enc_str_->inst != NULL) {
WebRtcG722_FreeEncoder(ptr_enc_str_->inst);
ptr_enc_str_->inst = NULL;
}
if (ptr_enc_str_->inst_right != NULL) {
WebRtcG722_FreeEncoder(ptr_enc_str_->inst_right);
ptr_enc_str_->inst_right = NULL;
}
delete ptr_enc_str_;
ptr_enc_str_ = NULL;
}
return;
}
int32_t ACMG722::Add10MsDataSafe(const uint32_t timestamp,
const int16_t* data,
const uint16_t length_smpl,
const uint8_t audio_channel) {
return ACMGenericCodec::Add10MsDataSafe(
(timestamp >> 1), data, length_smpl, audio_channel);
}
int16_t ACMG722::InternalEncode(uint8_t* bitstream,
int16_t* bitstream_len_byte) {
// If stereo, split input signal in left and right channel before encoding
if (num_channels_ == 2) {
int16_t left_channel[960];
int16_t right_channel[960];
uint8_t out_left[480];
uint8_t out_right[480];
int16_t len_in_bytes;
for (int i = 0, j = 0; i < frame_len_smpl_ * 2; i += 2, j++) {
left_channel[j] = in_audio_[in_audio_ix_read_ + i];
right_channel[j] = in_audio_[in_audio_ix_read_ + i + 1];
}
len_in_bytes = WebRtcG722_Encode(
encoder_inst_ptr_, left_channel, frame_len_smpl_,
out_left);
len_in_bytes += WebRtcG722_Encode(encoder_inst_ptr_right_,
right_channel,
frame_len_smpl_,
out_right);
*bitstream_len_byte = len_in_bytes;
// Interleave the 4 bits per sample from left and right channel
for (int i = 0, j = 0; i < len_in_bytes; i += 2, j++) {
bitstream[i] = (out_left[j] & 0xF0) + (out_right[j] >> 4);
bitstream[i + 1] = ((out_left[j] & 0x0F) << 4) + (out_right[j] & 0x0F);
}
} else {
*bitstream_len_byte = WebRtcG722_Encode(
encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_,
bitstream);
}
// increment the read index this tell the caller how far
// we have gone forward in reading the audio buffer
in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
return *bitstream_len_byte;
}
int16_t ACMG722::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
if (codec_params->codec_inst.channels == 2) {
// Create codec struct for right channel
if (ptr_enc_str_->inst_right == NULL) {
WebRtcG722_CreateEncoder(&ptr_enc_str_->inst_right);
if (ptr_enc_str_->inst_right == NULL) {
return -1;
}
}
encoder_inst_ptr_right_ = ptr_enc_str_->inst_right;
if (WebRtcG722_EncoderInit(encoder_inst_ptr_right_) < 0) {
return -1;
}
}
return WebRtcG722_EncoderInit(encoder_inst_ptr_);
}
ACMGenericCodec* ACMG722::CreateInstance(void) { return NULL; }
int16_t ACMG722::InternalCreateEncoder() {
if (ptr_enc_str_ == NULL) {
// this structure must be created at the costructor
// if it is still NULL then there is a probelm and
// we dont continue
return -1;
}
WebRtcG722_CreateEncoder(&ptr_enc_str_->inst);
if (ptr_enc_str_->inst == NULL) {
return -1;
}
encoder_inst_ptr_ = ptr_enc_str_->inst;
return 0;
}
void ACMG722::DestructEncoderSafe() {
if (ptr_enc_str_ != NULL) {
if (ptr_enc_str_->inst != NULL) {
WebRtcG722_FreeEncoder(ptr_enc_str_->inst);
ptr_enc_str_->inst = NULL;
}
}
encoder_exist_ = false;
encoder_initialized_ = false;
}
#endif
} // namespace acm2
} // namespace webrtc
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