blob: 2f1668b825bc020908d983981a512bf7f3760dd4 [file] [log] [blame]
/*
* Copyright (c) 2017 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/opus/audio_decoder_opus.h"
#include <memory>
#include <utility>
#include <vector>
#include "absl/memory/memory.h"
#include "absl/strings/match.h"
#include "modules/audio_coding/codecs/opus/audio_decoder_opus.h"
namespace webrtc {
absl::optional<AudioDecoderOpus::Config> AudioDecoderOpus::SdpToConfig(
const SdpAudioFormat& format) {
const auto num_channels = [&]() -> absl::optional<int> {
auto stereo = format.parameters.find("stereo");
if (stereo != format.parameters.end()) {
if (stereo->second == "0") {
return 1;
} else if (stereo->second == "1") {
return 2;
} else {
return absl::nullopt; // Bad stereo parameter.
}
}
return 1; // Default to mono.
}();
if (absl::EqualsIgnoreCase(format.name, "opus") &&
format.clockrate_hz == 48000 && format.num_channels == 2 &&
num_channels) {
return Config{*num_channels};
} else {
return absl::nullopt;
}
}
void AudioDecoderOpus::AppendSupportedDecoders(
std::vector<AudioCodecSpec>* specs) {
AudioCodecInfo opus_info{48000, 1, 64000, 6000, 510000};
opus_info.allow_comfort_noise = false;
opus_info.supports_network_adaption = true;
SdpAudioFormat opus_format(
{"opus", 48000, 2, {{"minptime", "10"}, {"useinbandfec", "1"}}});
specs->push_back({std::move(opus_format), std::move(opus_info)});
}
std::unique_ptr<AudioDecoder> AudioDecoderOpus::MakeAudioDecoder(
Config config,
absl::optional<AudioCodecPairId> /*codec_pair_id*/) {
return absl::make_unique<AudioDecoderOpusImpl>(config.num_channels);
}
} // namespace webrtc