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Diffstat (limited to '')
| -rw-r--r-- | third_party/libwebrtc/api/audio_codecs/audio_decoder.cc | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/audio_codecs/audio_decoder.cc b/third_party/libwebrtc/api/audio_codecs/audio_decoder.cc new file mode 100644 index 0000000000..28f5b8aae8 --- /dev/null +++ b/third_party/libwebrtc/api/audio_codecs/audio_decoder.cc @@ -0,0 +1,170 @@ +/* + * Copyright (c) 2012 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 "api/audio_codecs/audio_decoder.h" + + +#include <memory> +#include <utility> + +#include "api/array_view.h" +#include "rtc_base/checks.h" +#include "rtc_base/sanitizer.h" +#include "rtc_base/trace_event.h" + +namespace webrtc { + +namespace { + +class OldStyleEncodedFrame final : public AudioDecoder::EncodedAudioFrame { + public: + OldStyleEncodedFrame(AudioDecoder* decoder, rtc::Buffer&& payload) + : decoder_(decoder), payload_(std::move(payload)) {} + + size_t Duration() const override { + const int ret = decoder_->PacketDuration(payload_.data(), payload_.size()); + return ret < 0 ? 0 : static_cast<size_t>(ret); + } + + absl::optional<DecodeResult> Decode( + rtc::ArrayView<int16_t> decoded) const override { + auto speech_type = AudioDecoder::kSpeech; + const int ret = decoder_->Decode( + payload_.data(), payload_.size(), decoder_->SampleRateHz(), + decoded.size() * sizeof(int16_t), decoded.data(), &speech_type); + return ret < 0 ? absl::nullopt + : absl::optional<DecodeResult>( + {static_cast<size_t>(ret), speech_type}); + } + + private: + AudioDecoder* const decoder_; + const rtc::Buffer payload_; +}; + +} // namespace + +bool AudioDecoder::EncodedAudioFrame::IsDtxPacket() const { + return false; +} + +AudioDecoder::ParseResult::ParseResult() = default; +AudioDecoder::ParseResult::ParseResult(ParseResult&& b) = default; +AudioDecoder::ParseResult::ParseResult(uint32_t timestamp, + int priority, + std::unique_ptr<EncodedAudioFrame> frame) + : timestamp(timestamp), priority(priority), frame(std::move(frame)) { + RTC_DCHECK_GE(priority, 0); +} + +AudioDecoder::ParseResult::~ParseResult() = default; + +AudioDecoder::ParseResult& AudioDecoder::ParseResult::operator=( + ParseResult&& b) = default; + +std::vector<AudioDecoder::ParseResult> AudioDecoder::ParsePayload( + rtc::Buffer&& payload, + uint32_t timestamp) { + std::vector<ParseResult> results; + std::unique_ptr<EncodedAudioFrame> frame( + new OldStyleEncodedFrame(this, std::move(payload))); + results.emplace_back(timestamp, 0, std::move(frame)); + return results; +} + +int AudioDecoder::Decode(const uint8_t* encoded, + size_t encoded_len, + int sample_rate_hz, + size_t max_decoded_bytes, + int16_t* decoded, + SpeechType* speech_type) { + TRACE_EVENT0("webrtc", "AudioDecoder::Decode"); + rtc::MsanCheckInitialized(rtc::MakeArrayView(encoded, encoded_len)); + int duration = PacketDuration(encoded, encoded_len); + if (duration >= 0 && + duration * Channels() * sizeof(int16_t) > max_decoded_bytes) { + return -1; + } + return DecodeInternal(encoded, encoded_len, sample_rate_hz, decoded, + speech_type); +} + +int AudioDecoder::DecodeRedundant(const uint8_t* encoded, + size_t encoded_len, + int sample_rate_hz, + size_t max_decoded_bytes, + int16_t* decoded, + SpeechType* speech_type) { + TRACE_EVENT0("webrtc", "AudioDecoder::DecodeRedundant"); + rtc::MsanCheckInitialized(rtc::MakeArrayView(encoded, encoded_len)); + int duration = PacketDurationRedundant(encoded, encoded_len); + if (duration >= 0 && + duration * Channels() * sizeof(int16_t) > max_decoded_bytes) { + return -1; + } + return DecodeRedundantInternal(encoded, encoded_len, sample_rate_hz, decoded, + speech_type); +} + +int AudioDecoder::DecodeRedundantInternal(const uint8_t* encoded, + size_t encoded_len, + int sample_rate_hz, + int16_t* decoded, + SpeechType* speech_type) { + return DecodeInternal(encoded, encoded_len, sample_rate_hz, decoded, + speech_type); +} + +bool AudioDecoder::HasDecodePlc() const { + return false; +} + +size_t AudioDecoder::DecodePlc(size_t num_frames, int16_t* decoded) { + return 0; +} + +// TODO(bugs.webrtc.org/9676): Remove default implementation. +void AudioDecoder::GeneratePlc(size_t /*requested_samples_per_channel*/, + rtc::BufferT<int16_t>* /*concealment_audio*/) {} + +int AudioDecoder::ErrorCode() { + return 0; +} + +int AudioDecoder::PacketDuration(const uint8_t* encoded, + size_t encoded_len) const { + return kNotImplemented; +} + +int AudioDecoder::PacketDurationRedundant(const uint8_t* encoded, + size_t encoded_len) const { + return kNotImplemented; +} + +bool AudioDecoder::PacketHasFec(const uint8_t* encoded, + size_t encoded_len) const { + return false; +} + +AudioDecoder::SpeechType AudioDecoder::ConvertSpeechType(int16_t type) { + switch (type) { + case 0: // TODO(hlundin): Both iSAC and Opus return 0 for speech. + case 1: + return kSpeech; + case 2: + return kComfortNoise; + default: + RTC_DCHECK_NOTREACHED(); + return kSpeech; + } +} + +constexpr int AudioDecoder::kMaxNumberOfChannels; +} // namespace webrtc |