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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_ilbc.h"
#ifdef WEBRTC_CODEC_ILBC
#include "webrtc/modules/audio_coding/codecs/ilbc/interface/ilbc.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_ILBC
ACMILBC::ACMILBC(int16_t /* codec_id */) : encoder_inst_ptr_(NULL) {}
ACMILBC::~ACMILBC() { return; }
int16_t ACMILBC::InternalEncode(uint8_t* /* bitstream */,
int16_t* /* bitstream_len_byte */) {
return -1;
}
int16_t ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
return -1;
}
ACMGenericCodec* ACMILBC::CreateInstance(void) { return NULL; }
int16_t ACMILBC::InternalCreateEncoder() { return -1; }
void ACMILBC::DestructEncoderSafe() { return; }
int16_t ACMILBC::SetBitRateSafe(const int32_t /* rate */) { return -1; }
#else //===================== Actual Implementation =======================
ACMILBC::ACMILBC(int16_t codec_id) : encoder_inst_ptr_(NULL) {
codec_id_ = codec_id;
return;
}
ACMILBC::~ACMILBC() {
if (encoder_inst_ptr_ != NULL) {
WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
encoder_inst_ptr_ = NULL;
}
return;
}
int16_t ACMILBC::InternalEncode(uint8_t* bitstream,
int16_t* bitstream_len_byte) {
*bitstream_len_byte = WebRtcIlbcfix_Encode(
encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_,
bitstream);
if (*bitstream_len_byte < 0) {
WEBRTC_TRACE(webrtc::kTraceError,
webrtc::kTraceAudioCoding,
unique_id_,
"InternalEncode: error in encode for ILBC");
return -1;
}
// 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 ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
// initialize with a correct processing block length
if ((160 == (codec_params->codec_inst).pacsize) ||
(320 == (codec_params->codec_inst).pacsize)) {
// processing block of 20ms
return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
} else if ((240 == (codec_params->codec_inst).pacsize) ||
(480 == (codec_params->codec_inst).pacsize)) {
// processing block of 30ms
return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
} else {
WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
"InternalInitEncoder: invalid processing block");
return -1;
}
}
ACMGenericCodec* ACMILBC::CreateInstance(void) { return NULL; }
int16_t ACMILBC::InternalCreateEncoder() {
if (WebRtcIlbcfix_EncoderCreate(&encoder_inst_ptr_) < 0) {
WEBRTC_TRACE(webrtc::kTraceError,
webrtc::kTraceAudioCoding,
unique_id_,
"InternalCreateEncoder: cannot create instance for ILBC "
"encoder");
return -1;
}
return 0;
}
void ACMILBC::DestructEncoderSafe() {
encoder_initialized_ = false;
encoder_exist_ = false;
if (encoder_inst_ptr_ != NULL) {
WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
encoder_inst_ptr_ = NULL;
}
}
int16_t ACMILBC::SetBitRateSafe(const int32_t rate) {
// Check that rate is valid. No need to store the value
if (rate == 13300) {
WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
} else if (rate == 15200) {
WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
} else {
return -1;
}
encoder_params_.codec_inst.rate = rate;
return 0;
}
#endif
} // namespace acm2
} // namespace webrtc
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