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/*
* Copyright (c) 2019 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_encoder_multi_channel_opus.h"
#include <utility>
#include "modules/audio_coding/codecs/opus/audio_encoder_multi_channel_opus_impl.h"
namespace webrtc {
absl::optional<AudioEncoderMultiChannelOpusConfig>
AudioEncoderMultiChannelOpus::SdpToConfig(const SdpAudioFormat& format) {
return AudioEncoderMultiChannelOpusImpl::SdpToConfig(format);
}
void AudioEncoderMultiChannelOpus::AppendSupportedEncoders(
std::vector<AudioCodecSpec>* specs) {
// To get full utilization of the surround support of the Opus lib, we can
// mark which channel is the low frequency effects (LFE). But that is not done
// ATM.
{
AudioCodecInfo surround_5_1_opus_info{48000, 6,
/* default_bitrate_bps= */ 128000};
surround_5_1_opus_info.allow_comfort_noise = false;
surround_5_1_opus_info.supports_network_adaption = false;
SdpAudioFormat opus_format({"multiopus",
48000,
6,
{{"minptime", "10"},
{"useinbandfec", "1"},
{"channel_mapping", "0,4,1,2,3,5"},
{"num_streams", "4"},
{"coupled_streams", "2"}}});
specs->push_back({std::move(opus_format), surround_5_1_opus_info});
}
{
AudioCodecInfo surround_7_1_opus_info{48000, 8,
/* default_bitrate_bps= */ 200000};
surround_7_1_opus_info.allow_comfort_noise = false;
surround_7_1_opus_info.supports_network_adaption = false;
SdpAudioFormat opus_format({"multiopus",
48000,
8,
{{"minptime", "10"},
{"useinbandfec", "1"},
{"channel_mapping", "0,6,1,2,3,4,5,7"},
{"num_streams", "5"},
{"coupled_streams", "3"}}});
specs->push_back({std::move(opus_format), surround_7_1_opus_info});
}
}
AudioCodecInfo AudioEncoderMultiChannelOpus::QueryAudioEncoder(
const AudioEncoderMultiChannelOpusConfig& config) {
return AudioEncoderMultiChannelOpusImpl::QueryAudioEncoder(config);
}
std::unique_ptr<AudioEncoder> AudioEncoderMultiChannelOpus::MakeAudioEncoder(
const AudioEncoderMultiChannelOpusConfig& config,
int payload_type,
absl::optional<AudioCodecPairId> /*codec_pair_id*/,
const FieldTrialsView* field_trials) {
return AudioEncoderMultiChannelOpusImpl::MakeAudioEncoder(config,
payload_type);
}
} // namespace webrtc
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