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108 lines
3.4 KiB
108 lines
3.4 KiB
/*
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* WhackerLink - WhackerLinkConsoleV2
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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using System.Collections.Generic;
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namespace WhackerLinkConsoleV2
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{
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public class AudioManager
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{
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private WaveOutEvent _waveOut;
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private MixingSampleProvider _mixer;
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private Dictionary<string, (BufferedWaveProvider buffer, GainSampleProvider gainProvider)> _talkgroupProviders;
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/// <summary>
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/// Creates an instance of <see cref="AudioManager"/>
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/// </summary>
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public AudioManager()
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{
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_waveOut = new WaveOutEvent();
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_talkgroupProviders = new Dictionary<string, (BufferedWaveProvider, GainSampleProvider)>();
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_mixer = new MixingSampleProvider(WaveFormat.CreateIeeeFloatWaveFormat(8000, 1))
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{
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ReadFully = true
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};
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_waveOut.Init(_mixer);
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_waveOut.Play();
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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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var bufferProvider = new BufferedWaveProvider(new WaveFormat(8000, 16, 1))
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{
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DiscardOnBufferOverflow = true
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};
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var gainProvider = new GainSampleProvider(bufferProvider.ToSampleProvider())
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{
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Gain = 1.0f
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};
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_talkgroupProviders[talkgroupId] = (bufferProvider, gainProvider);
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_mixer.AddMixerInput(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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{
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_talkgroupProviders[talkgroupId].gainProvider.Gain = volume;
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}
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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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/// 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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_waveOut.Stop();
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}
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}
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}
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