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115 lines
4.1 KiB
115 lines
4.1 KiB
// SPDX-License-Identifier: AGPL-3.0-only
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/**
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* Digital Voice Modem - Desktop Dispatch Console
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* AGPLv3 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* @package DVM / Desktop Dispatch Console
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* @license AGPLv3 License (https://opensource.org/licenses/AGPL-3.0)
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*
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* Copyright (C) 2025 Caleb, K4PHP
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*
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*/
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using NAudio.Wave;
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using NAudio.Wave.SampleProviders;
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namespace dvmconsole
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{
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/// <summary>
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/// Class for managing audio streams.
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/// </summary>
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public class AudioManager
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{
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private Dictionary<string, (WaveOutEvent waveOut, MixingSampleProvider mixer, BufferedWaveProvider buffer, GainSampleProvider gainProvider)> talkgroupProviders;
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private SettingsManager settingsManager;
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/*
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** Methods
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*/
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/// <summary>
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/// Creates an instance of <see cref="AudioManager"/> class.
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/// </summary>
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public AudioManager(SettingsManager settingsManager)
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{
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this.settingsManager = settingsManager;
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talkgroupProviders = new Dictionary<string, (WaveOutEvent, MixingSampleProvider, BufferedWaveProvider, GainSampleProvider)>();
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}
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/// <summary>
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/// Bad name, adds samples to a provider or creates a new provider
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/// </summary>
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/// <param name="talkgroupId"></param>
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/// <param name="audioData"></param>
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public void AddTalkgroupStream(string talkgroupId, byte[] audioData)
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{
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if (!talkgroupProviders.ContainsKey(talkgroupId))
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AddTalkgroupStream(talkgroupId);
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talkgroupProviders[talkgroupId].buffer.AddSamples(audioData, 0, audioData.Length);
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}
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/// <summary>
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/// Internal helper to create a talkgroup stream
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/// </summary>
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/// <param name="talkgroupId"></param>
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private void AddTalkgroupStream(string talkgroupId)
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{
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int deviceIndex = settingsManager.ChannelOutputDevices.ContainsKey(talkgroupId) ? settingsManager.ChannelOutputDevices[talkgroupId] : 0;
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var waveOut = new WaveOutEvent { DeviceNumber = deviceIndex };
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var bufferProvider = new BufferedWaveProvider(new WaveFormat(8000, 16, 1)) { DiscardOnBufferOverflow = true };
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var gainProvider = new GainSampleProvider(bufferProvider.ToSampleProvider()) { Gain = 1.0f };
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var mixer = new MixingSampleProvider(WaveFormat.CreateIeeeFloatWaveFormat(8000, 1)) { ReadFully = true };
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mixer.AddMixerInput(gainProvider);
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waveOut.Init(mixer);
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waveOut.Play();
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talkgroupProviders[talkgroupId] = (waveOut, mixer, bufferProvider, gainProvider);
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}
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/// <summary>
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/// Adjusts the volume of a specific talkgroup stream
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/// </summary>
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public void SetTalkgroupVolume(string talkgroupId, float volume)
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{
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if (talkgroupProviders.ContainsKey(talkgroupId))
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talkgroupProviders[talkgroupId].gainProvider.Gain = volume;
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else
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{
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AddTalkgroupStream(talkgroupId);
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talkgroupProviders[talkgroupId].gainProvider.Gain = volume;
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}
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}
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/// <summary>
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/// Set stream output device
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/// </summary>
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/// <param name="talkgroupId"></param>
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/// <param name="deviceIndex"></param>
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public void SetTalkgroupOutputDevice(string talkgroupId, int deviceIndex)
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{
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if (talkgroupProviders.ContainsKey(talkgroupId))
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{
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talkgroupProviders[talkgroupId].waveOut.Stop();
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talkgroupProviders.Remove(talkgroupId);
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}
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settingsManager.UpdateChannelOutputDevice(talkgroupId, deviceIndex);
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AddTalkgroupStream(talkgroupId);
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}
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/// <summary>
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/// Lop off the wave out
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/// </summary>
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public void Stop()
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{
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foreach (var provider in talkgroupProviders.Values)
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provider.waveOut.Stop();
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}
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} // public class AudioManager
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} // namespace dvmconsole
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