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/*
* Copyright (c) 2014 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/codecs/red/audio_encoder_copy_red.h"
#include <string.h>
#include "webrtc/base/checks.h"
namespace webrtc {
AudioEncoderCopyRed::AudioEncoderCopyRed(const Config& config)
: speech_encoder_(config.speech_encoder),
red_payload_type_(config.payload_type) {
RTC_CHECK(speech_encoder_) << "Speech encoder not provided.";
}
AudioEncoderCopyRed::~AudioEncoderCopyRed() = default;
size_t AudioEncoderCopyRed::MaxEncodedBytes() const {
return 2 * speech_encoder_->MaxEncodedBytes();
}
int AudioEncoderCopyRed::SampleRateHz() const {
return speech_encoder_->SampleRateHz();
}
size_t AudioEncoderCopyRed::NumChannels() const {
return speech_encoder_->NumChannels();
}
int AudioEncoderCopyRed::RtpTimestampRateHz() const {
return speech_encoder_->RtpTimestampRateHz();
}
size_t AudioEncoderCopyRed::Num10MsFramesInNextPacket() const {
return speech_encoder_->Num10MsFramesInNextPacket();
}
size_t AudioEncoderCopyRed::Max10MsFramesInAPacket() const {
return speech_encoder_->Max10MsFramesInAPacket();
}
int AudioEncoderCopyRed::GetTargetBitrate() const {
return speech_encoder_->GetTargetBitrate();
}
AudioEncoder::EncodedInfo AudioEncoderCopyRed::EncodeInternal(
uint32_t rtp_timestamp,
rtc::ArrayView<const int16_t> audio,
size_t max_encoded_bytes,
uint8_t* encoded) {
EncodedInfo info =
speech_encoder_->Encode(rtp_timestamp, audio, max_encoded_bytes, encoded);
RTC_CHECK_GE(max_encoded_bytes,
info.encoded_bytes + secondary_info_.encoded_bytes);
RTC_CHECK(info.redundant.empty()) << "Cannot use nested redundant encoders.";
if (info.encoded_bytes > 0) {
// |info| will be implicitly cast to an EncodedInfoLeaf struct, effectively
// discarding the (empty) vector of redundant information. This is
// intentional.
info.redundant.push_back(info);
RTC_DCHECK_EQ(info.redundant.size(), 1u);
if (secondary_info_.encoded_bytes > 0) {
memcpy(&encoded[info.encoded_bytes], secondary_encoded_.data(),
secondary_info_.encoded_bytes);
info.redundant.push_back(secondary_info_);
RTC_DCHECK_EQ(info.redundant.size(), 2u);
}
// Save primary to secondary.
secondary_encoded_.SetData(encoded, info.encoded_bytes);
secondary_info_ = info;
RTC_DCHECK_EQ(info.speech, info.redundant[0].speech);
}
// Update main EncodedInfo.
info.payload_type = red_payload_type_;
info.encoded_bytes = 0;
for (std::vector<EncodedInfoLeaf>::const_iterator it = info.redundant.begin();
it != info.redundant.end(); ++it) {
info.encoded_bytes += it->encoded_bytes;
}
return info;
}
void AudioEncoderCopyRed::Reset() {
speech_encoder_->Reset();
secondary_encoded_.Clear();
secondary_info_.encoded_bytes = 0;
}
bool AudioEncoderCopyRed::SetFec(bool enable) {
return speech_encoder_->SetFec(enable);
}
bool AudioEncoderCopyRed::SetDtx(bool enable) {
return speech_encoder_->SetDtx(enable);
}
bool AudioEncoderCopyRed::SetApplication(Application application) {
return speech_encoder_->SetApplication(application);
}
void AudioEncoderCopyRed::SetMaxPlaybackRate(int frequency_hz) {
speech_encoder_->SetMaxPlaybackRate(frequency_hz);
}
void AudioEncoderCopyRed::SetProjectedPacketLossRate(double fraction) {
speech_encoder_->SetProjectedPacketLossRate(fraction);
}
void AudioEncoderCopyRed::SetTargetBitrate(int bits_per_second) {
speech_encoder_->SetTargetBitrate(bits_per_second);
}
} // namespace webrtc
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