Opus implementation of the AudioDecoderFactoryTemplate API

webrtc/modules/audio_coding/codecs/opus/audio_decoder_opus.cc

 /*
  *  Copyright (c) 2015 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/opus/audio_decoder_opus.h"
 
 #include <utility>
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 
 namespace {
 class OpusFrame : public AudioDecoder::EncodedAudioFrame {
  public:
-  OpusFrame(AudioDecoderOpus* decoder,
+  OpusFrame(AudioDecoderOpusImpl* decoder,
             rtc::Buffer&& payload,
             bool is_primary_payload)
       : decoder_(decoder),
         payload_(std::move(payload)),
         is_primary_payload_(is_primary_payload) {}
 
   size_t Duration() const override {
     int ret;
     if (is_primary_payload_) {
       ret = decoder_->PacketDuration(payload_.data(), payload_.size());
@@ skipping 17 matching lines @@
           decoded.size() * sizeof(int16_t), decoded.data(), &speech_type);
     }
 
     if (ret < 0)
       return rtc::Optional<DecodeResult>();
 
     return rtc::Optional<DecodeResult>({static_cast<size_t>(ret), speech_type});
   }
 
  private:
-  AudioDecoderOpus* const decoder_;
+  AudioDecoderOpusImpl* const decoder_;
   const rtc::Buffer payload_;
   const bool is_primary_payload_;
 };
 
 }  // namespace
 
-AudioDecoderOpus::AudioDecoderOpus(size_t num_channels)
+AudioDecoderOpusImpl::AudioDecoderOpusImpl(size_t num_channels)
     : channels_(num_channels) {
   RTC_DCHECK(num_channels == 1 || num_channels == 2);
   WebRtcOpus_DecoderCreate(&dec_state_, channels_);
   WebRtcOpus_DecoderInit(dec_state_);
 }
 
-AudioDecoderOpus::~AudioDecoderOpus() {
+AudioDecoderOpusImpl::~AudioDecoderOpusImpl() {
   WebRtcOpus_DecoderFree(dec_state_);
 }
 
-std::vector<AudioDecoder::ParseResult> AudioDecoderOpus::ParsePayload(
+std::vector<AudioDecoder::ParseResult> AudioDecoderOpusImpl::ParsePayload(
     rtc::Buffer&& payload,
     uint32_t timestamp) {
   std::vector<ParseResult> results;
 
   if (PacketHasFec(payload.data(), payload.size())) {
     const int duration =
         PacketDurationRedundant(payload.data(), payload.size());
     RTC_DCHECK_GE(duration, 0);
     rtc::Buffer payload_copy(payload.data(), payload.size());
     std::unique_ptr<EncodedAudioFrame> fec_frame(
         new OpusFrame(this, std::move(payload_copy), false));
     results.emplace_back(timestamp - duration, 1, std::move(fec_frame));
   }
   std::unique_ptr<EncodedAudioFrame> frame(
       new OpusFrame(this, std::move(payload), true));
   results.emplace_back(timestamp, 0, std::move(frame));
   return results;
 }
 
-int AudioDecoderOpus::DecodeInternal(const uint8_t* encoded,
-                                     size_t encoded_len,
-                                     int sample_rate_hz,
-                                     int16_t* decoded,
-                                     SpeechType* speech_type) {
+int AudioDecoderOpusImpl::DecodeInternal(const uint8_t* encoded,
+                                         size_t encoded_len,
+                                         int sample_rate_hz,
+                                         int16_t* decoded,
+                                         SpeechType* speech_type) {
   RTC_DCHECK_EQ(sample_rate_hz, 48000);
   int16_t temp_type = 1;  // Default is speech.
   int ret =
       WebRtcOpus_Decode(dec_state_, encoded, encoded_len, decoded, &temp_type);
   if (ret > 0)
     ret *= static_cast<int>(channels_);  // Return total number of samples.
   *speech_type = ConvertSpeechType(temp_type);
   return ret;
 }
 
-int AudioDecoderOpus::DecodeRedundantInternal(const uint8_t* encoded,
-                                              size_t encoded_len,
-                                              int sample_rate_hz,
-                                              int16_t* decoded,
-                                              SpeechType* speech_type) {
+int AudioDecoderOpusImpl::DecodeRedundantInternal(const uint8_t* encoded,
+                                                  size_t encoded_len,
+                                                  int sample_rate_hz,
+                                                  int16_t* decoded,
+                                                  SpeechType* speech_type) {
   if (!PacketHasFec(encoded, encoded_len)) {
     // This packet is a RED packet.
     return DecodeInternal(encoded, encoded_len, sample_rate_hz, decoded,
                           speech_type);
   }
 
   RTC_DCHECK_EQ(sample_rate_hz, 48000);
   int16_t temp_type = 1;  // Default is speech.
   int ret = WebRtcOpus_DecodeFec(dec_state_, encoded, encoded_len, decoded,
                                  &temp_type);
   if (ret > 0)
     ret *= static_cast<int>(channels_);  // Return total number of samples.
   *speech_type = ConvertSpeechType(temp_type);
   return ret;
 }
 
-void AudioDecoderOpus::Reset() {
+void AudioDecoderOpusImpl::Reset() {
   WebRtcOpus_DecoderInit(dec_state_);
 }
 
-int AudioDecoderOpus::PacketDuration(const uint8_t* encoded,
-                                     size_t encoded_len) const {
+int AudioDecoderOpusImpl::PacketDuration(const uint8_t* encoded,
+                                         size_t encoded_len) const {
   return WebRtcOpus_DurationEst(dec_state_, encoded, encoded_len);
 }
 
-int AudioDecoderOpus::PacketDurationRedundant(const uint8_t* encoded,
-                                              size_t encoded_len) const {
+int AudioDecoderOpusImpl::PacketDurationRedundant(const uint8_t* encoded,
+                                                  size_t encoded_len) const {
   if (!PacketHasFec(encoded, encoded_len)) {
     // This packet is a RED packet.
     return PacketDuration(encoded, encoded_len);
   }
 
   return WebRtcOpus_FecDurationEst(encoded, encoded_len);
 }
 
-bool AudioDecoderOpus::PacketHasFec(const uint8_t* encoded,
-                                    size_t encoded_len) const {
+bool AudioDecoderOpusImpl::PacketHasFec(const uint8_t* encoded,
+                                        size_t encoded_len) const {
   int fec;
   fec = WebRtcOpus_PacketHasFec(encoded, encoded_len);
   return (fec == 1);
 }
 
-int AudioDecoderOpus::SampleRateHz() const {
+int AudioDecoderOpusImpl::SampleRateHz() const {
   return 48000;
 }
 
-size_t AudioDecoderOpus::Channels() const {
+size_t AudioDecoderOpusImpl::Channels() const {
   return channels_;
 }
 
 }  // namespace webrtc