static ShazamResult CaptureAndTag()
{
var analysis = new Analysis();
var finder = new LandmarkFinder(analysis);
using (var capture = new WasapiCapture()) {
var captureBuf = new BufferedWaveProvider(capture.WaveFormat)
{
ReadFully = false
};
capture.DataAvailable += (s, e) => {
captureBuf.AddSamples(e.Buffer, 0, e.BytesRecorded);
};
capture.StartRecording();
using (var resampler = new MediaFoundationResampler(captureBuf, new WaveFormat(Analysis.SAMPLE_RATE, 16, 1))) {
var sampleProvider = resampler.ToSampleProvider();
var retryMs = 3000;
var tagId = Guid.NewGuid().ToString();
while (true)
{
while (captureBuf.BufferedDuration.TotalSeconds < 1)
{
Thread.Sleep(100);
}
analysis.ReadChunk(sampleProvider);
if (analysis.StripeCount > 2 * LandmarkFinder.RADIUS_TIME)
{
finder.Find(analysis.StripeCount - LandmarkFinder.RADIUS_TIME - 1);
}
if (analysis.ProcessedMs >= retryMs)
{
//new Painter(analysis, finder).Paint("c:/temp/spectro.png");
//new Synthback(analysis, finder).Synth("c:/temp/synthback.raw");
var sigBytes = Sig.Write(Analysis.SAMPLE_RATE, analysis.ProcessedSamples, finder);
var result = ShazamApi.SendRequest(tagId, analysis.ProcessedMs, sigBytes).GetAwaiter().GetResult();
if (result.Success)
{
return(result);
}
retryMs = result.RetryMs;
if (retryMs == 0)
{
return(result);
}
}
}
}
}
}
private void writeObjects(Stream writer)
{
int count = _xref.Entries.Count;
byte[] endObj = System.Text.Encoding.ASCII.GetBytes("\nendobj\n");
SaveParameters param = new SaveParameters();
param.Stream = writer;
param.WriteInheritableObjects = false;
param.Buffer = new MemoryStream(4096);
param.StringBuffer = new MemoryStream(1024);
param.Compression = _compression;
param.Encryptor = _xref.Encryptor;
if (_xref.Encryptor != null)
{
count--;
}
for (int i = 1; i < count; ++i)
{
Entry entry = _xref.Entries[i];
entry.Offset = (int)writer.Position;
string startObj = i.ToString() + " 0 obj\n";
writer.Write(System.Text.Encoding.ASCII.GetBytes(startObj), 0, startObj.Length);
param.ObjNo = i;
// Если словарь подписи, то находим запись ByteRange и ее офсет
if (entry.Object.ObjNo == _signature)
{
_byteRangeOffset = Sig.Write(param, entry.Object as PDFDictionary, out _byteRange);
}
else
{
entry.Object.Write(param);
}
writer.Write(endObj, 0, endObj.Length);
}
if (_xref.Encryptor != null)
{
param.Encryptor = null;
param.WriteInheritableObjects = true;
Entry entry = _xref.Entries[count];
entry.Offset = (int)writer.Position;
string startObj = count.ToString() + " 0 obj\n";
writer.Write(System.Text.Encoding.ASCII.GetBytes(startObj), 0, startObj.Length);
entry.Object.Write(param);
writer.Write(endObj, 0, endObj.Length);
}
param.Buffer.Dispose();
param.StringBuffer.Dispose();
}
