| /* |
| * Copyright (c) 2016 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 <algorithm> |
| |
| #include "webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h" |
| #include "webrtc/rtc_base/checks.h" |
| |
| namespace webrtc { |
| |
| ChannelController::Config::Config(size_t num_encoder_channels, |
| size_t intial_channels_to_encode, |
| int channel_1_to_2_bandwidth_bps, |
| int channel_2_to_1_bandwidth_bps) |
| : num_encoder_channels(num_encoder_channels), |
| intial_channels_to_encode(intial_channels_to_encode), |
| channel_1_to_2_bandwidth_bps(channel_1_to_2_bandwidth_bps), |
| channel_2_to_1_bandwidth_bps(channel_2_to_1_bandwidth_bps) {} |
| |
| ChannelController::ChannelController(const Config& config) |
| : config_(config), channels_to_encode_(config_.intial_channels_to_encode) { |
| RTC_DCHECK_GT(config_.intial_channels_to_encode, 0lu); |
| // Currently, we require |intial_channels_to_encode| to be <= 2. |
| RTC_DCHECK_LE(config_.intial_channels_to_encode, 2lu); |
| RTC_DCHECK_GE(config_.num_encoder_channels, |
| config_.intial_channels_to_encode); |
| } |
| |
| ChannelController::~ChannelController() = default; |
| |
| void ChannelController::UpdateNetworkMetrics( |
| const NetworkMetrics& network_metrics) { |
| if (network_metrics.uplink_bandwidth_bps) |
| uplink_bandwidth_bps_ = network_metrics.uplink_bandwidth_bps; |
| } |
| |
| void ChannelController::MakeDecision(AudioEncoderRuntimeConfig* config) { |
| // Decision on |num_channels| should not have been made. |
| RTC_DCHECK(!config->num_channels); |
| |
| if (uplink_bandwidth_bps_) { |
| if (channels_to_encode_ == 2 && |
| *uplink_bandwidth_bps_ <= config_.channel_2_to_1_bandwidth_bps) { |
| channels_to_encode_ = 1; |
| } else if (channels_to_encode_ == 1 && |
| *uplink_bandwidth_bps_ >= config_.channel_1_to_2_bandwidth_bps) { |
| channels_to_encode_ = |
| std::min(static_cast<size_t>(2), config_.num_encoder_channels); |
| } |
| } |
| config->num_channels = rtc::Optional<size_t>(channels_to_encode_); |
| } |
| |
| } // namespace webrtc |