private void cleanup()
{
if (this.clip != null)
{
(this.clip as IDisposable).Dispose();
this.clip = null;
}
if (this.environment != null)
{
(this.environment as IDisposable).Dispose();
this.environment = null;
}
}
//Скрипт из файла
public void OpenScript(string scriptPath)
{
try
{
this.environment = new AviSynthScriptEnvironment();
this.clip = environment.OpenScriptFile(scriptPath, forced_colorspace, forced_sampletype);
//if (!this.clip.HasVideo) throw new ArgumentException("Script doesn't contain video");
}
catch (Exception)
{
cleanup();
throw;
}
}
private void writeHeader(Stream target, AviSynthClip a)
{
const uint FAAD_MAGIC_VALUE = 0xFFFFFF00;
const uint WAV_HEADER_SIZE = 36;
bool useFaadTrick = a.AudioSizeInBytes >= ((long)uint.MaxValue - WAV_HEADER_SIZE);
target.Write(System.Text.Encoding.ASCII.GetBytes("RIFF"), 0, 4);
target.Write(BitConverter.GetBytes(useFaadTrick ? FAAD_MAGIC_VALUE : (uint)(a.AudioSizeInBytes + WAV_HEADER_SIZE)), 0, 4);
target.Write(System.Text.Encoding.ASCII.GetBytes("WAVEfmt "), 0, 8);
target.Write(BitConverter.GetBytes((uint)0x10), 0, 4);
target.Write(BitConverter.GetBytes((a.SampleType == AudioSampleType.FLOAT) ? (short)0x03 : (short)0x01), 0, 2);
target.Write(BitConverter.GetBytes(a.ChannelsCount), 0, 2);
target.Write(BitConverter.GetBytes(a.AudioSampleRate), 0, 4);
target.Write(BitConverter.GetBytes(a.AvgBytesPerSec), 0, 4);
target.Write(BitConverter.GetBytes(a.BytesPerSample * a.ChannelsCount), 0, 2);
target.Write(BitConverter.GetBytes(a.BitsPerSample), 0, 2);
target.Write(System.Text.Encoding.ASCII.GetBytes("data"), 0, 4);
target.Write(BitConverter.GetBytes(useFaadTrick ? (FAAD_MAGIC_VALUE - WAV_HEADER_SIZE) : (uint)a.AudioSizeInBytes), 0, 4);
}
public static bool RetrieveAviSynthInfo()
{
AVSIsMT = false;
AVSVersionFloat = 0;
AVSVersionString = Languages.Translate("AviSynth is not found!");
try
{
using (AviSynthClip clp = new AviSynthClip())
{
AVSVersionString = clp.Invoke("VersionString", null, AVSVersionString);
AVSVersionFloat = clp.Invoke("VersionNumber", null, AVSVersionFloat);
AVSIsMT = clp.IsFuncExists("SetMTMode");
if (AVSVersionFloat > 0)
{
return(true);
}
}
}
catch (Exception) { }
return(false);
}
private void StartEncoding()
{
try
{
using (AviSynthScriptEnvironment env = new AviSynthScriptEnvironment())
{
using (AviSynthClip a = env.ParseScript(script, AviSynthColorspace.Undefined, AudioSampleType.INT16))
{
if (a.ChannelsCount == 0)
{
throw new Exception("Can't find audio stream");
}
const int MAX_SAMPLES_PER_ONCE = 4096;
int frameSample = 0;
//MeGUI
int frameBufferTotalSize = MAX_SAMPLES_PER_ONCE * a.ChannelsCount * a.BytesPerSample;
byte[] frameBuffer = new byte[frameBufferTotalSize];
if (encoderPath != null)
{
createEncoderProcess();
}
if (!IsGainDetecting)
{
//Обычное кодирование/извлечение звука
using (Stream target = getOutputStream())
{
//let's write WAV Header
writeHeader(target, a);
GCHandle h = GCHandle.Alloc(frameBuffer, GCHandleType.Pinned);
IntPtr address = h.AddrOfPinnedObject();
try
{
while (frameSample < a.SamplesCount)
{
locker.WaitOne();
int nHowMany = Math.Min((int)(a.SamplesCount - frameSample), MAX_SAMPLES_PER_ONCE);
a.ReadAudio(address, frameSample, nHowMany);
locker.WaitOne();
frame = (int)(((double)frameSample / (double)a.SamplesCount) * (double)a.num_frames);
target.Write(frameBuffer, 0, nHowMany * a.ChannelsCount * a.BytesPerSample);
target.Flush();
frameSample += nHowMany;
Thread.Sleep(0);
}
}
catch (Exception ex)
{
if (_encoderProcess != null && _encoderProcess.HasExited)
{
throw new Exception("Abnormal encoder termination (exit code = " + _encoderProcess.ExitCode.ToString() + ")");
}
else
{
throw new Exception(ex.Message, ex);
}
}
finally
{
h.Free();
}
if (a.BytesPerSample % 2 == 1)
{
target.WriteByte(0);
}
}
}
else
{
//Определяем peak level
int max = 0, e = 0, ch = a.ChannelsCount;
GCHandle h = GCHandle.Alloc(frameBuffer, GCHandleType.Pinned);
IntPtr address = h.AddrOfPinnedObject();
try
{
while (frameSample < a.SamplesCount)
{
locker.WaitOne();
int nHowMany = Math.Min((int)(a.SamplesCount - frameSample), MAX_SAMPLES_PER_ONCE);
frame = (int)(((double)frameSample / (double)a.SamplesCount) * (double)a.num_frames);
a.ReadAudio(address, frameSample, nHowMany);
locker.WaitOne();
int n = 0, pos = 0;
while (n < nHowMany)
{
//Ищем максимум для каждого канала
for (int i = 0; i < ch; i += 1)
{
//Это годится только для 16-ти битного звука!
e = BitConverter.ToInt16(frameBuffer, pos);
max = Math.Max(max, Math.Abs(e));
pos += 2;
}
n += 1;
}
frameSample += nHowMany;
Thread.Sleep(0);
}
if (max != 0)
{
gain = 20.0 * Math.Log10((32767.0 * Convert.ToDouble(m.volume.Replace("%", ""))) / ((double)max * 100.0));
}
}
finally
{
h.Free();
}
}
if (_encoderProcess != null)
{
_encoderProcess.WaitForExit();
_readFromStdErrThread.Join();
_readFromStdOutThread.Join();
if (_encoderProcess.ExitCode != 0)
{
throw new Exception("Abnormal encoder termination (exit code = " + _encoderProcess.ExitCode.ToString() + ")");
}
}
}
}
}
catch (Exception ex)
{
if (!IsAborted)
{
IsErrors = true;
exception_raw = ex;
error_text = ((IsGainDetecting) ? "Gain Detector Error: " : "AviSynth Encoder Error: ") + ex.Message;
try
{
Thread.Sleep(500);
if (_encoderProcess != null && _encoderProcess.HasExited && _encoderProcess.ExitCode != 0)
{
error_text += ("\r\n" + (!string.IsNullOrEmpty(_encoderStdErr) ? "\r\n" + _encoderStdErr : "") +
(!string.IsNullOrEmpty(_encoderStdOut) ? "\r\n" + _encoderStdOut : ""));
}
}
catch (Exception exc)
{
error_text += "\r\n\r\nThere was Exception while trying to get error info:\r\n" + exc.Message;
}
}
}
finally
{
try
{
if (_encoderProcess != null && !_encoderProcess.HasExited)
{
_encoderProcess.Kill();
_encoderProcess.WaitForExit();
_readFromStdErrThread.Join();
_readFromStdOutThread.Join();
}
}
catch { }
_encoderProcess = null;
_readFromStdErrThread = null;
_readFromStdOutThread = null;
_encoderThread = null;
}
}
private void cleanup()
{
if (this.clip != null)
{
(this.clip as IDisposable).Dispose();
this.clip = null;
}
if (this.environment != null)
{
(this.environment as IDisposable).Dispose();
this.environment = null;
}
}
//Скрипт в виде string
public void ParseScript(string script)
{
try
{
this.environment = new AviSynthScriptEnvironment();
this.clip = environment.ParseScript(script, forced_colorspace, forced_sampletype);
//if (!this.clip.HasVideo) throw new ArgumentException("Script doesn't contain video");
}
catch (Exception)
{
cleanup();
throw;
}
}
private void writeHeader(Stream target, AviSynthClip a)
{
const uint FAAD_MAGIC_VALUE = 0xFFFFFF00;
const uint WAV_HEADER_SIZE = 36;
bool useFaadTrick = a.AudioSizeInBytes >= ((long)uint.MaxValue - WAV_HEADER_SIZE);
target.Write(System.Text.Encoding.ASCII.GetBytes("RIFF"), 0, 4);
target.Write(BitConverter.GetBytes(useFaadTrick ? FAAD_MAGIC_VALUE : (uint)(a.AudioSizeInBytes + WAV_HEADER_SIZE)), 0, 4);
target.Write(System.Text.Encoding.ASCII.GetBytes("WAVEfmt "), 0, 8);
target.Write(BitConverter.GetBytes((uint)0x10), 0, 4);
target.Write(BitConverter.GetBytes((a.SampleType == AudioSampleType.FLOAT) ? (short)0x03 : (short)0x01), 0, 2);
target.Write(BitConverter.GetBytes(a.ChannelsCount), 0, 2);
target.Write(BitConverter.GetBytes(a.AudioSampleRate), 0, 4);
target.Write(BitConverter.GetBytes(a.AvgBytesPerSec), 0, 4);
target.Write(BitConverter.GetBytes(a.BytesPerSample * a.ChannelsCount), 0, 2);
target.Write(BitConverter.GetBytes(a.BitsPerSample), 0, 2);
target.Write(System.Text.Encoding.ASCII.GetBytes("data"), 0, 4);
target.Write(BitConverter.GetBytes(useFaadTrick ? (FAAD_MAGIC_VALUE - WAV_HEADER_SIZE) : (uint)a.AudioSizeInBytes), 0, 4);
}