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/*
* 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/g722/audio_decoder_g722.h"
#include <memory>
#include <vector>
#include "absl/strings/match.h"
#include "modules/audio_coding/codecs/g722/audio_decoder_g722.h"
#include "rtc_base/numerics/safe_conversions.h"
namespace webrtc {
absl::optional<AudioDecoderG722::Config> AudioDecoderG722::SdpToConfig(
const SdpAudioFormat& format) {
if (absl::EqualsIgnoreCase(format.name, "G722") &&
format.clockrate_hz == 8000 &&
(format.num_channels == 1 || format.num_channels == 2)) {
return Config{rtc::dchecked_cast<int>(format.num_channels)};
}
return absl::nullopt;
}
void AudioDecoderG722::AppendSupportedDecoders(
std::vector<AudioCodecSpec>* specs) {
specs->push_back({{"G722", 8000, 1}, {16000, 1, 64000}});
}
std::unique_ptr<AudioDecoder> AudioDecoderG722::MakeAudioDecoder(
Config config,
absl::optional<AudioCodecPairId> /*codec_pair_id*/,
const FieldTrialsView* field_trials) {
if (!config.IsOk()) {
RTC_DCHECK_NOTREACHED();
return nullptr;
}
switch (config.num_channels) {
case 1:
return std::make_unique<AudioDecoderG722Impl>();
case 2:
return std::make_unique<AudioDecoderG722StereoImpl>();
default:
RTC_DCHECK_NOTREACHED();
return nullptr;
}
}
} // namespace webrtc
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