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146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_coding/main/acm2/acm_ilbc.h"
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#ifdef WEBRTC_CODEC_ILBC
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#include "webrtc/modules/audio_coding/codecs/ilbc/interface/ilbc.h"
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#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
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#include "webrtc/system_wrappers/interface/trace.h"
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#endif
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namespace webrtc {
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namespace acm2 {
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#ifndef WEBRTC_CODEC_ILBC
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ACMILBC::ACMILBC(int16_t /* codec_id */) : encoder_inst_ptr_(NULL) {}
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ACMILBC::~ACMILBC() { return; }
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int16_t ACMILBC::InternalEncode(uint8_t* /* bitstream */,
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int16_t* /* bitstream_len_byte */) {
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return -1;
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}
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int16_t ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
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return -1;
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}
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ACMGenericCodec* ACMILBC::CreateInstance(void) { return NULL; }
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int16_t ACMILBC::InternalCreateEncoder() { return -1; }
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void ACMILBC::DestructEncoderSafe() { return; }
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void ACMILBC::InternalDestructEncoderInst(void* /* ptr_inst */) { return; }
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int16_t ACMILBC::SetBitRateSafe(const int32_t /* rate */) { return -1; }
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#else //===================== Actual Implementation =======================
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ACMILBC::ACMILBC(int16_t codec_id) : encoder_inst_ptr_(NULL) {
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codec_id_ = codec_id;
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return;
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}
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ACMILBC::~ACMILBC() {
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if (encoder_inst_ptr_ != NULL) {
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WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
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encoder_inst_ptr_ = NULL;
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}
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return;
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}
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int16_t ACMILBC::InternalEncode(uint8_t* bitstream,
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int16_t* bitstream_len_byte) {
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*bitstream_len_byte = WebRtcIlbcfix_Encode(
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encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], frame_len_smpl_,
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reinterpret_cast<int16_t*>(bitstream));
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if (*bitstream_len_byte < 0) {
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WEBRTC_TRACE(webrtc::kTraceError,
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webrtc::kTraceAudioCoding,
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unique_id_,
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"InternalEncode: error in encode for ILBC");
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return -1;
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}
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// increment the read index this tell the caller that how far
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// we have gone forward in reading the audio buffer
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in_audio_ix_read_ += frame_len_smpl_;
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return *bitstream_len_byte;
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}
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int16_t ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
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// initialize with a correct processing block length
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if ((160 == (codec_params->codec_inst).pacsize) ||
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(320 == (codec_params->codec_inst).pacsize)) {
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// processing block of 20ms
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return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
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} else if ((240 == (codec_params->codec_inst).pacsize) ||
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(480 == (codec_params->codec_inst).pacsize)) {
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// processing block of 30ms
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return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
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} else {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
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"InternalInitEncoder: invalid processing block");
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return -1;
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}
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}
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ACMGenericCodec* ACMILBC::CreateInstance(void) { return NULL; }
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int16_t ACMILBC::InternalCreateEncoder() {
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if (WebRtcIlbcfix_EncoderCreate(&encoder_inst_ptr_) < 0) {
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WEBRTC_TRACE(webrtc::kTraceError,
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webrtc::kTraceAudioCoding,
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unique_id_,
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"InternalCreateEncoder: cannot create instance for ILBC "
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"encoder");
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return -1;
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}
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return 0;
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}
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void ACMILBC::DestructEncoderSafe() {
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encoder_initialized_ = false;
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encoder_exist_ = false;
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if (encoder_inst_ptr_ != NULL) {
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WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
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encoder_inst_ptr_ = NULL;
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}
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}
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void ACMILBC::InternalDestructEncoderInst(void* ptr_inst) {
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if (ptr_inst != NULL) {
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WebRtcIlbcfix_EncoderFree(static_cast<iLBC_encinst_t_*>(ptr_inst));
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}
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return;
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}
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int16_t ACMILBC::SetBitRateSafe(const int32_t rate) {
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// Check that rate is valid. No need to store the value
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if (rate == 13300) {
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WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
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} else if (rate == 15200) {
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WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
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} else {
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return -1;
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}
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encoder_params_.codec_inst.rate = rate;
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return 0;
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}
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#endif
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} // namespace acm2
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} // namespace webrtc
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