Alex Loiko | e5b9416 | 2019-04-08 17:19:41 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_CODER_OPUS_COMMON_H_ |
| 12 | #define MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_CODER_OPUS_COMMON_H_ |
| 13 | |
| 14 | #include <string> |
| 15 | #include <utility> |
| 16 | #include <vector> |
| 17 | |
| 18 | #include "absl/types/optional.h" |
| 19 | #include "api/audio_codecs/audio_decoder.h" |
| 20 | #include "api/audio_codecs/audio_format.h" |
| 21 | #include "rtc_base/string_to_number.h" |
| 22 | |
| 23 | namespace webrtc { |
| 24 | |
| 25 | absl::optional<std::string> GetFormatParameter(const SdpAudioFormat& format, |
| 26 | const std::string& param); |
| 27 | |
| 28 | template <typename T> |
| 29 | absl::optional<T> GetFormatParameter(const SdpAudioFormat& format, |
| 30 | const std::string& param) { |
| 31 | return rtc::StringToNumber<T>(GetFormatParameter(format, param).value_or("")); |
| 32 | } |
| 33 | |
| 34 | template <> |
| 35 | absl::optional<std::vector<unsigned char>> GetFormatParameter( |
| 36 | const SdpAudioFormat& format, |
| 37 | const std::string& param); |
| 38 | |
| 39 | class OpusFrame : public AudioDecoder::EncodedAudioFrame { |
| 40 | public: |
| 41 | OpusFrame(AudioDecoder* decoder, |
| 42 | rtc::Buffer&& payload, |
| 43 | bool is_primary_payload) |
| 44 | : decoder_(decoder), |
| 45 | payload_(std::move(payload)), |
| 46 | is_primary_payload_(is_primary_payload) {} |
| 47 | |
| 48 | size_t Duration() const override { |
| 49 | int ret; |
| 50 | if (is_primary_payload_) { |
| 51 | ret = decoder_->PacketDuration(payload_.data(), payload_.size()); |
| 52 | } else { |
| 53 | ret = decoder_->PacketDurationRedundant(payload_.data(), payload_.size()); |
| 54 | } |
| 55 | return (ret < 0) ? 0 : static_cast<size_t>(ret); |
| 56 | } |
| 57 | |
| 58 | bool IsDtxPacket() const override { return payload_.size() <= 2; } |
| 59 | |
| 60 | absl::optional<DecodeResult> Decode( |
| 61 | rtc::ArrayView<int16_t> decoded) const override { |
| 62 | AudioDecoder::SpeechType speech_type = AudioDecoder::kSpeech; |
| 63 | int ret; |
| 64 | if (is_primary_payload_) { |
| 65 | ret = decoder_->Decode( |
| 66 | payload_.data(), payload_.size(), decoder_->SampleRateHz(), |
| 67 | decoded.size() * sizeof(int16_t), decoded.data(), &speech_type); |
| 68 | } else { |
| 69 | ret = decoder_->DecodeRedundant( |
| 70 | payload_.data(), payload_.size(), decoder_->SampleRateHz(), |
| 71 | decoded.size() * sizeof(int16_t), decoded.data(), &speech_type); |
| 72 | } |
| 73 | |
| 74 | if (ret < 0) |
| 75 | return absl::nullopt; |
| 76 | |
| 77 | return DecodeResult{static_cast<size_t>(ret), speech_type}; |
| 78 | } |
| 79 | |
| 80 | private: |
| 81 | AudioDecoder* const decoder_; |
| 82 | const rtc::Buffer payload_; |
| 83 | const bool is_primary_payload_; |
| 84 | }; |
| 85 | |
| 86 | } // namespace webrtc |
| 87 | |
| 88 | #endif // MODULES_AUDIO_CODING_CODECS_OPUS_AUDIO_CODER_OPUS_COMMON_H_ |