81 lines
1.7 KiB
C#
81 lines
1.7 KiB
C#
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using UnityEngine;
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//-----------------------------------------------------------------------------
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// Copyright 2019-2022 RenderHeads Ltd. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace RenderHeads.Media.AVProVideo
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{
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/// Allows per-channel volume control
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/// Currently supported on Windows and UWP (Media Foundation API only), macOS, iOS, tvOS and Android (ExoPlayer API only)
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[AddComponentMenu("AVPro Video/Audio Channel Mixer", 401)]
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[HelpURL("https://www.renderheads.com/products/avpro-video/")]
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public class AudioChannelMixer : MonoBehaviour
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{
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const int MaxChannels = 8;
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[Range(0f, 1f)]
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[SerializeField] float[] _channels = null;
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/// Range 0.0 to 1.0
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public float[] Channel
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{
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get { return _channels; }
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set { _channels = value; }
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}
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void Reset()
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{
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_channels = new float[MaxChannels];
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for (int i = 0; i < MaxChannels; i++)
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{
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_channels[i] = 1f;
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}
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}
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void ChangeChannelCount(int numChannels)
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{
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float[] channels = new float[numChannels];
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if (_channels != null && _channels.Length != 0)
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{
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for (int i = 0; i < channels.Length; i++)
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{
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if (i < _channels.Length)
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{
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channels[i] = _channels[i];
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}
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else
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{
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channels[i] = 1f;
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}
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}
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}
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else
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{
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for (int i = 0; i < numChannels; i++)
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{
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channels[i] = 1f;
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}
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}
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_channels = channels;
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}
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void OnAudioFilterRead(float[] data, int channels)
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{
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if (channels != _channels.Length)
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{
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ChangeChannelCount(channels);
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}
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int k = 0;
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int numSamples = data.Length / channels;
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for (int j = 0; j < numSamples; j++)
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{
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for (int i = 0; i < channels; i++)
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{
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data[k] *= _channels[i];
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k++;
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}
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}
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}
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}
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}
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