mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-28 02:37:46 +00:00
315 lines
8.8 KiB
C++
315 lines
8.8 KiB
C++
/*
|
|
* 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_amr.h"
|
|
|
|
#ifdef WEBRTC_CODEC_AMR
|
|
// NOTE! GSM AMR is not included in the open-source package. The following
|
|
// interface file is needed:
|
|
#include "webrtc/modules/audio_coding/main/codecs/amr/interface/amr_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 WebRtcAmr_CreateEnc(AMR_encinst_t_** enc_inst);
|
|
// int16_t WebRtcAmr_CreateDec(AMR_decinst_t_** dec_inst);
|
|
// int16_t WebRtcAmr_FreeEnc(AMR_encinst_t_* enc_inst);
|
|
// int16_t WebRtcAmr_FreeDec(AMR_decinst_t_* dec_inst);
|
|
// int16_t WebRtcAmr_Encode(AMR_encinst_t_* enc_inst,
|
|
// int16_t* input,
|
|
// int16_t len,
|
|
// int16_t*output,
|
|
// int16_t mode);
|
|
// int16_t WebRtcAmr_EncoderInit(AMR_encinst_t_* enc_inst,
|
|
// int16_t dtx_mode);
|
|
// int16_t WebRtcAmr_EncodeBitmode(AMR_encinst_t_* enc_inst,
|
|
// int format);
|
|
// int16_t WebRtcAmr_Decode(AMR_decinst_t_* dec_inst);
|
|
// int16_t WebRtcAmr_DecodePlc(AMR_decinst_t_* dec_inst);
|
|
// int16_t WebRtcAmr_DecoderInit(AMR_decinst_t_* dec_inst);
|
|
// int16_t WebRtcAmr_DecodeBitmode(AMR_decinst_t_* dec_inst,
|
|
// int format);
|
|
#endif
|
|
|
|
namespace webrtc {
|
|
|
|
namespace acm2 {
|
|
|
|
#ifndef WEBRTC_CODEC_AMR
|
|
ACMAMR::ACMAMR(int16_t /* codec_id */)
|
|
: encoder_inst_ptr_(NULL),
|
|
encoding_mode_(-1), // Invalid value.
|
|
encoding_rate_(0), // Invalid value.
|
|
encoder_packing_format_(AMRBandwidthEfficient) {
|
|
return;
|
|
}
|
|
|
|
ACMAMR::~ACMAMR() { return; }
|
|
|
|
int16_t ACMAMR::InternalEncode(uint8_t* /* bitstream */,
|
|
int16_t* /* bitstream_len_byte */) {
|
|
return -1;
|
|
}
|
|
|
|
int16_t ACMAMR::EnableDTX() { return -1; }
|
|
|
|
int16_t ACMAMR::DisableDTX() { return -1; }
|
|
|
|
int16_t ACMAMR::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
|
|
return -1;
|
|
}
|
|
|
|
ACMGenericCodec* ACMAMR::CreateInstance(void) { return NULL; }
|
|
|
|
int16_t ACMAMR::InternalCreateEncoder() { return -1; }
|
|
|
|
void ACMAMR::DestructEncoderSafe() { return; }
|
|
|
|
int16_t ACMAMR::SetBitRateSafe(const int32_t /* rate */) { return -1; }
|
|
|
|
void ACMAMR::InternalDestructEncoderInst(void* /* ptr_inst */) { return; }
|
|
|
|
int16_t ACMAMR::SetAMREncoderPackingFormat(
|
|
ACMAMRPackingFormat /* packing_format */) {
|
|
return -1;
|
|
}
|
|
|
|
ACMAMRPackingFormat ACMAMR::AMREncoderPackingFormat() const {
|
|
return AMRUndefined;
|
|
}
|
|
|
|
int16_t ACMAMR::SetAMRDecoderPackingFormat(
|
|
ACMAMRPackingFormat /* packing_format */) {
|
|
return -1;
|
|
}
|
|
|
|
ACMAMRPackingFormat ACMAMR::AMRDecoderPackingFormat() const {
|
|
return AMRUndefined;
|
|
}
|
|
|
|
#else //===================== Actual Implementation =======================
|
|
|
|
#define WEBRTC_AMR_MR475 0
|
|
#define WEBRTC_AMR_MR515 1
|
|
#define WEBRTC_AMR_MR59 2
|
|
#define WEBRTC_AMR_MR67 3
|
|
#define WEBRTC_AMR_MR74 4
|
|
#define WEBRTC_AMR_MR795 5
|
|
#define WEBRTC_AMR_MR102 6
|
|
#define WEBRTC_AMR_MR122 7
|
|
|
|
ACMAMR::ACMAMR(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;
|
|
}
|
|
|
|
ACMAMR::~ACMAMR() {
|
|
if (encoder_inst_ptr_ != NULL) {
|
|
WebRtcAmr_FreeEnc(encoder_inst_ptr_);
|
|
encoder_inst_ptr_ = NULL;
|
|
}
|
|
return;
|
|
}
|
|
|
|
int16_t ACMAMR::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_ < WEBRTC_AMR_MR475) ||
|
|
(encoding_mode_ > WEBRTC_AMR_MR122)) {
|
|
*bitstream_len_byte = 0;
|
|
return -1;
|
|
}
|
|
*bitstream_len_byte = WebRtcAmr_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
|
|
in_audio_ix_read_ += frame_len_smpl_;
|
|
return *bitstream_len_byte;
|
|
}
|
|
|
|
int16_t ACMAMR::EnableDTX() {
|
|
if (dtx_enabled_) {
|
|
return 0;
|
|
} else if (encoder_exist_) { // check if encoder exist
|
|
// enable DTX
|
|
if (WebRtcAmr_EncoderInit(encoder_inst_ptr_, 1) < 0) {
|
|
return -1;
|
|
}
|
|
dtx_enabled_ = true;
|
|
return 0;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
int16_t ACMAMR::DisableDTX() {
|
|
if (!dtx_enabled_) {
|
|
return 0;
|
|
} else if (encoder_exist_) { // check if encoder exist
|
|
// disable DTX
|
|
if (WebRtcAmr_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 ACMAMR::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
|
|
int16_t status = SetBitRateSafe((codec_params->codec_inst).rate);
|
|
status += (WebRtcAmr_EncoderInit(encoder_inst_ptr_,
|
|
((codec_params->enable_dtx) ? 1 : 0)) < 0)
|
|
? -1
|
|
: 0;
|
|
status +=
|
|
(WebRtcAmr_EncodeBitmode(encoder_inst_ptr_, encoder_packing_format_) < 0)
|
|
? -1
|
|
: 0;
|
|
return (status < 0) ? -1 : 0;
|
|
}
|
|
|
|
ACMGenericCodec* ACMAMR::CreateInstance(void) { return NULL; }
|
|
|
|
int16_t ACMAMR::InternalCreateEncoder() {
|
|
return WebRtcAmr_CreateEnc(&encoder_inst_ptr_);
|
|
}
|
|
|
|
void ACMAMR::DestructEncoderSafe() {
|
|
if (encoder_inst_ptr_ != NULL) {
|
|
WebRtcAmr_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; // invalid value
|
|
}
|
|
|
|
int16_t ACMAMR::SetBitRateSafe(const int32_t rate) {
|
|
switch (rate) {
|
|
case 4750: {
|
|
encoding_mode_ = WEBRTC_AMR_MR475;
|
|
encoding_rate_ = 4750;
|
|
break;
|
|
}
|
|
case 5150: {
|
|
encoding_mode_ = WEBRTC_AMR_MR515;
|
|
encoding_rate_ = 5150;
|
|
break;
|
|
}
|
|
case 5900: {
|
|
encoding_mode_ = WEBRTC_AMR_MR59;
|
|
encoding_rate_ = 5900;
|
|
break;
|
|
}
|
|
case 6700: {
|
|
encoding_mode_ = WEBRTC_AMR_MR67;
|
|
encoding_rate_ = 6700;
|
|
break;
|
|
}
|
|
case 7400: {
|
|
encoding_mode_ = WEBRTC_AMR_MR74;
|
|
encoding_rate_ = 7400;
|
|
break;
|
|
}
|
|
case 7950: {
|
|
encoding_mode_ = WEBRTC_AMR_MR795;
|
|
encoding_rate_ = 7950;
|
|
break;
|
|
}
|
|
case 10200: {
|
|
encoding_mode_ = WEBRTC_AMR_MR102;
|
|
encoding_rate_ = 10200;
|
|
break;
|
|
}
|
|
case 12200: {
|
|
encoding_mode_ = WEBRTC_AMR_MR122;
|
|
encoding_rate_ = 12200;
|
|
break;
|
|
}
|
|
default: {
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ACMAMR::InternalDestructEncoderInst(void* ptr_inst) {
|
|
// Free the memory where ptr_inst is pointing to
|
|
if (ptr_inst != NULL) {
|
|
WebRtcAmr_FreeEnc(static_cast<AMR_encinst_t_*>(ptr_inst));
|
|
}
|
|
return;
|
|
}
|
|
|
|
int16_t ACMAMR::SetAMREncoderPackingFormat(ACMAMRPackingFormat packing_format) {
|
|
if ((packing_format != AMRBandwidthEfficient) &&
|
|
(packing_format != AMROctetAlligned) &&
|
|
(packing_format != AMRFileStorage)) {
|
|
WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
|
|
"Invalid AMR Encoder packing-format.");
|
|
return -1;
|
|
} else {
|
|
if (WebRtcAmr_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) {
|
|
return -1;
|
|
} else {
|
|
encoder_packing_format_ = packing_format;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
ACMAMRPackingFormat ACMAMR::AMREncoderPackingFormat() const {
|
|
return encoder_packing_format_;
|
|
}
|
|
|
|
int16_t ACMAMR::SetAMRDecoderPackingFormat(
|
|
ACMAMRPackingFormat /* packing_format */) {
|
|
// Not implemented.
|
|
return -1;
|
|
}
|
|
|
|
ACMAMRPackingFormat ACMAMR::AMRDecoderPackingFormat() const {
|
|
// Not implemented.
|
|
return AMRUndefined;
|
|
}
|
|
|
|
#endif
|
|
} // namespace acm2
|
|
|
|
} // namespace webrtc
|