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https://github.com/oxen-io/session-android.git
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d83a3d71bc
Merge in RedPhone // FREEBIE
196 lines
5.2 KiB
C++
196 lines
5.2 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_celt.h"
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#ifdef WEBRTC_CODEC_CELT
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// NOTE! Celt is not included in the open-source package. Modify this file or
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// your codec API to match the function call and name of used CELT API file.
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#include "webrtc/modules/audio_coding/codecs/celt/include/celt_interface.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_CELT
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ACMCELT::ACMCELT(int16_t /* codec_id */)
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: enc_inst_ptr_(NULL),
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sampling_freq_(0),
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bitrate_(0),
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channels_(1) {
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return;
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}
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ACMCELT::~ACMCELT() {
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return;
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}
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int16_t ACMCELT::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 ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
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return -1;
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}
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ACMGenericCodec* ACMCELT::CreateInstance(void) {
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return NULL;
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}
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int16_t ACMCELT::InternalCreateEncoder() {
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return -1;
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}
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void ACMCELT::DestructEncoderSafe() {
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return;
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}
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void ACMCELT::InternalDestructEncoderInst(void* /* ptr_inst */) {
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return;
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}
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int16_t ACMCELT::SetBitRateSafe(const int32_t /*rate*/) {
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return -1;
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}
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#else //===================== Actual Implementation =======================
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ACMCELT::ACMCELT(int16_t codec_id)
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: enc_inst_ptr_(NULL),
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sampling_freq_(32000), // Default sampling frequency.
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bitrate_(64000), // Default rate.
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channels_(1) { // Default send mono.
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// TODO(tlegrand): remove later when ACMGenericCodec has a new constructor.
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codec_id_ = codec_id;
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return;
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}
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ACMCELT::~ACMCELT() {
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if (enc_inst_ptr_ != NULL) {
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WebRtcCelt_FreeEnc(enc_inst_ptr_);
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enc_inst_ptr_ = NULL;
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}
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return;
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}
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int16_t ACMCELT::InternalEncode(uint8_t* bitstream,
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int16_t* bitstream_len_byte) {
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*bitstream_len_byte = 0;
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// Call Encoder.
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*bitstream_len_byte = WebRtcCelt_Encode(enc_inst_ptr_,
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&in_audio_[in_audio_ix_read_],
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bitstream);
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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_ * channels_;
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if (*bitstream_len_byte < 0) {
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// Error reported from the encoder.
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
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"InternalEncode: Encode error for Celt");
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*bitstream_len_byte = 0;
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return -1;
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}
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return *bitstream_len_byte;
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}
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int16_t ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
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// Set bitrate and check that it is within the valid range.
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int16_t status = SetBitRateSafe((codec_params->codec_inst).rate);
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if (status < 0) {
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return -1;
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}
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// If number of channels changed we need to re-create memory.
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if (codec_params->codec_inst.channels != channels_) {
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WebRtcCelt_FreeEnc(enc_inst_ptr_);
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enc_inst_ptr_ = NULL;
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// Store new number of channels.
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channels_ = codec_params->codec_inst.channels;
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if (WebRtcCelt_CreateEnc(&enc_inst_ptr_, channels_) < 0) {
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return -1;
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}
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}
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// Initiate encoder.
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if (WebRtcCelt_EncoderInit(enc_inst_ptr_, channels_, bitrate_) >= 0) {
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return 0;
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} else {
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return -1;
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}
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}
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ACMGenericCodec* ACMCELT::CreateInstance(void) {
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return NULL;
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}
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int16_t ACMCELT::InternalCreateEncoder() {
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if (WebRtcCelt_CreateEnc(&enc_inst_ptr_, num_channels_) < 0) {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
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"InternalCreateEncoder: create encoder failed for Celt");
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return -1;
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}
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channels_ = num_channels_;
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return 0;
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}
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void ACMCELT::DestructEncoderSafe() {
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encoder_exist_ = false;
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encoder_initialized_ = false;
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if (enc_inst_ptr_ != NULL) {
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WebRtcCelt_FreeEnc(enc_inst_ptr_);
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enc_inst_ptr_ = NULL;
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}
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}
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void ACMCELT::InternalDestructEncoderInst(void* ptr_inst) {
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if (ptr_inst != NULL) {
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WebRtcCelt_FreeEnc(static_cast<CELT_encinst_t*>(ptr_inst));
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}
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return;
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}
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int16_t ACMCELT::SetBitRateSafe(const int32_t rate) {
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// Check that rate is in the valid range.
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if ((rate >= 48000) && (rate <= 128000)) {
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// Store new rate.
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bitrate_ = rate;
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// Initiate encoder with new rate.
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if (WebRtcCelt_EncoderInit(enc_inst_ptr_, channels_, bitrate_) >= 0) {
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return 0;
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} else {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
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"SetBitRateSafe: Failed to initiate Celt with rate %d",
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rate);
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return -1;
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}
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} else {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
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"SetBitRateSafe: Invalid rate Celt, %d", rate);
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return -1;
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}
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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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