mirror of
https://github.com/claunia/cuetools.net.git
synced 2025-12-16 18:14:25 +00:00
351 lines
8.7 KiB
C#
351 lines
8.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Threading;
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using System.Diagnostics;
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using CUETools.Codecs;
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namespace CUETools.DSP.Mixer
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{
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public class MixingSource : IAudioSource
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{
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AudioPCMConfig pcm;
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MixingBuffer[] buf;
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bool[] playing;
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float[] volume;
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long samplePos;
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int size;
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public MixingSource(AudioPCMConfig pcm, int delay, int sources)
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{
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this.pcm = pcm;
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this.size = delay * pcm.SampleRate / 1000;
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this.buf = new MixingBuffer[2];
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this.buf[0] = new MixingBuffer(pcm, size, sources);
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this.buf[1] = new MixingBuffer(pcm, size, sources);
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this.playing = new bool[sources];
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this.volume = new float[sources];
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this.samplePos = 0;
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}
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public void Close()
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{
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}
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public long Position
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{
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get
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{
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return samplePos;
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}
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set
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{
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throw new NotSupportedException();
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}
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}
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public long Length
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{
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get
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{
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throw new NotSupportedException();
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}
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}
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public long Remaining
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{
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get
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{
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throw new NotSupportedException();
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}
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}
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public AudioPCMConfig PCM
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{
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get
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{
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return pcm;
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}
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}
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MixingBuffer mixbuff = null;
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int mixoffs = 0;
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public int Read(AudioBuffer result, int maxLength)
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{
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if (maxLength > (BufferSize - mixoffs) || maxLength < 0)
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maxLength = (BufferSize - mixoffs);
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result.Prepare(maxLength);
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if (mixbuff == null)
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mixbuff = LockFilledBuffer();
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float sumVolume = 0.0f;
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for (int iSource = 0; iSource < mixbuff.source.Length; iSource++)
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if (mixbuff.filled[iSource])
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sumVolume += mixbuff.volume[iSource];
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for (int iSource = 0; iSource < mixbuff.source.Length; iSource++)
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volume[iSource] = mixbuff.filled[iSource] ? mixbuff.volume[iSource] / Math.Max(1.0f, sumVolume) : 0.0f;
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for (int iSmp = 0; iSmp < result.Length; iSmp++)
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{
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for (int iChan = 0; iChan < result.PCM.ChannelCount; iChan++)
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{
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float sample = 0.0f;
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for (int iSource = 0; iSource < mixbuff.source.Length; iSource++)
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sample += mixbuff.source[iSource].Float[mixoffs + iSmp, iChan] * volume[iSource];
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result.Float[iSmp, iChan] = sample;
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}
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}
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mixoffs += result.Length;
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if (mixoffs == BufferSize)
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{
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UnlockFilledBuffer(mixbuff);
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mixbuff = null;
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mixoffs = 0;
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}
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samplePos += result.Length;
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return result.Length;
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}
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public string Path { get { return ""; } }
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public int BufferSize
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{
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get
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{
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return buf[0].source[0].Size;
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}
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}
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private bool IsFilled(MixingBuffer buf)
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{
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bool res = true;
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for (int i = 0; i < buf.filled.Length; i++)
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res &= buf.filled[i] || !this.playing[i];
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return res;
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}
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int current = 0;
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internal MixingBuffer LockFilledBuffer()
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{
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lock (this)
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{
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//Trace.WriteLine(string.Format("LockFilledBuffer: 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1]));
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int no = current;
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while (!IsFilled(buf[no]))
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Monitor.Wait(this);
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current = 1 - no;
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return buf[no];
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}
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}
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internal void UnlockFilledBuffer(MixingBuffer mixbuff)
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{
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lock (this)
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{
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//Trace.WriteLine(string.Format("UnockFilledBuffer: 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1]));
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for (int i = 0; i < mixbuff.filled.Length; i++)
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mixbuff.filled[i] = false;
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Monitor.PulseAll(this);
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}
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}
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public void BufferPlaying(int iSource, bool playing)
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{
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lock (this)
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{
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//Trace.WriteLine(string.Format("BufferPlaying{8}< 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1], iSource));
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this.playing[iSource] = playing;
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//if (!playing) buf0.filled[iSource] = false;
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//if (!playing) buf1.filled[iSource] = false;
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//Trace.WriteLine(string.Format("BufferPlaying{8}> 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1], iSource));
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Monitor.PulseAll(this);
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}
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}
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internal MixingBuffer LockEmptyBuffer(int iSource)
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{
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lock (this)
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{
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//Trace.WriteLine(string.Format("LockEmptyBuffer{8}: 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1], iSource));
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while (!playing[iSource] || buf[current].filled[iSource])
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Monitor.Wait(this);
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return buf[current];
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}
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}
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internal void UnlockEmptyBuffer(MixingBuffer mixbuff, int iSource, float volume)
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{
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lock (this)
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{
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//Trace.WriteLine(string.Format("UnlockEmptyBuffer{8}< 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1], iSource));
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mixbuff.volume[iSource] = volume;
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mixbuff.filled[iSource] = true;
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//Trace.WriteLine(string.Format("UnlockEmptyBuffer{8}> 0.0: {0} {1}; 0.1: {2} {3}; 1.0: {4} {5}; 1.1: {6} {7};",
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1],
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// buf0.playing[0], buf0.filled[0], buf0.playing[1], buf0.filled[1], iSource));
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Monitor.PulseAll(this);
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}
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}
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}
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public class MixingBuffer
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{
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public AudioBuffer[] source;
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public float[] volume;
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public bool[] filled;
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public MixingBuffer(AudioPCMConfig pcm, int size, int sources)
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{
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source = new AudioBuffer[sources];
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volume = new float[sources];
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filled = new bool[sources];
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for (int i = 0; i < sources; i++)
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source[i] = new AudioBuffer(pcm, size);
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}
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}
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public class MixingWriter : IAudioDest
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{
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private MixingSource mixer;
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private int iSource;
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private long samplePos;
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private MixingBuffer mixbuff;
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private float volume;
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public MixingWriter(MixingSource mixer, int iSource)
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{
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this.mixer = mixer;
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this.iSource = iSource;
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this.samplePos = 0;
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this.mixbuff = null;
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this.volume = 1.0f;
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}
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public void Close()
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{
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}
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public void Delete()
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{
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Close();
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}
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public long Position
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{
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get { return samplePos; }
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set { throw new NotSupportedException(); }
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}
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public long FinalSampleCount
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{
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set { throw new NotSupportedException(); }
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}
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public long BlockSize
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{
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set { throw new NotSupportedException(); }
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}
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public int CompressionLevel
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{
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get { return 0; }
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set { throw new NotSupportedException(); }
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}
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public string Options
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{
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set
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{
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if (value == null || value == "") return;
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throw new NotSupportedException("Unsupported options " + value);
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}
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}
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public AudioPCMConfig PCM
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{
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get { return mixer.PCM; }
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}
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public float Volume
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{
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get
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{
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return volume;
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}
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set
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{
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volume = value;
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}
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}
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public void Pause()
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{
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mixer.LockEmptyBuffer(iSource);
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}
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public void Flush()
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{
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if (mixbuff != null)
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{
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if (mixbuff.source[iSource].Length < mixbuff.source[iSource].Size)
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AudioSamples.MemSet(mixbuff.source[iSource].Bytes, 0, mixbuff.source[iSource].Length * PCM.BlockAlign, (mixbuff.source[iSource].Size - mixbuff.source[iSource].Length) * PCM.BlockAlign);
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mixer.UnlockEmptyBuffer(mixbuff, iSource, volume);
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mixbuff = null;
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}
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}
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public void Write(AudioBuffer buff)
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{
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int bs = PCM.BlockAlign;
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int buff_offs = 0;
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while (buff_offs < buff.Length)
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{
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if (mixbuff == null)
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{
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mixbuff = mixer.LockEmptyBuffer(iSource);
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mixbuff.source[iSource].Prepare(-1);
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mixbuff.source[iSource].Length = 0;
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}
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int chunk = Math.Min(buff.Length - buff_offs, mixbuff.source[iSource].Size - mixbuff.source[iSource].Length);
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Buffer.BlockCopy(buff.Bytes, buff_offs * bs, mixbuff.source[iSource].Bytes, mixbuff.source[iSource].Length * bs, chunk * bs);
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mixbuff.source[iSource].Length += chunk;
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buff_offs += chunk;
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if (mixbuff.source[iSource].Length == mixbuff.source[iSource].Size)
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{
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mixer.UnlockEmptyBuffer(mixbuff, iSource, volume);
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mixbuff = null;
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}
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}
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samplePos += buff.Length;
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}
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public string Path { get { return ""; } }
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}
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}
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