/// <summary>
/// Initializes a new instance of the <see cref="GATAudioThreadStreamToCache"/> class.
/// </summary>
/// <param name="stream">The observed multichannel or mono stream.</param>
/// <param name="caches">The caches to record to, one per channel must be provided.</param>
/// <param name="handler">Optional callback fired when the cache is full.</param>
public GATAudioThreadStreamToCache( IGATAudioThreadStream stream, GATData[] caches, AtEndHandler handler = null )
{
_numFramesPerRead = stream.BufferSizePerChannel;
Caches = caches;
_stream = stream;
_onEnd = handler;
}
/// <summary>
/// Initializes a new instance of the <see cref="GATAudioThreadStreamToCache"/> class.
/// </summary>
/// <param name="stream">The observed multichannel or mono stream.</param>
/// <param name="caches">The caches to record to, one per channel must be provided.</param>
/// <param name="handler">Optional callback fired when the cache is full.</param>
public GATAudioThreadStreamToCache(IGATAudioThreadStream stream, GATData[] caches, AtEndHandler handler = null)
{
_numFramesPerRead = stream.BufferSizePerChannel;
Caches = caches;
_stream = stream;
_onEnd = handler;
}
/// <summary>
/// Start caching the stream.
/// </summary>
/// <param name="targetDspTime">The dsp time at which caching should start. Pass 0 to start as soon as possible.</param>
/// <param name="handler">Optional callback fired when the cache is full.</param>
public void Start(double targetDspTime = 0d, AtEndHandler handler = null)
{
if (_vDoCache || _waiting)
{
return;
}
_waiting = true;
_vPosition = 0;
_onEnd = handler;
_targetDspTime = targetDspTime;
_stream.AddAudioThreadStreamClient(this);
}
// Virtual solely so that we can subclass for testing, because mocks don't work with delegates.
public virtual void Download(string pid, AtStartHandler atStart, ProgressHandler progress, AtEndHandler atEnd) {
var page = GetIphonePage(pid);
if (!page.IsAvailable) {
atEnd(DownloadStatus.Unavailable, pid);
return;
}
var finalPath = FilenameSafe(GetTitle(pid)) + page.FileExtension;
var tempPath = finalPath + ".partial";
if (File.Exists(finalPath)){
atEnd(DownloadStatus.AlreadyExists, finalPath);
return;
}
atStart(finalPath);
var request = new CoreMediaRequest(page.EmbeddedMediaUrl, cookies);
var contentLength = request.ContentLength;
int totalReceived = 0;
using (var localStream = new FileStream(tempPath, FileMode.Append, FileAccess.Write, FileShare.Read)) {
totalReceived = (int)localStream.Position;
request.GetResponseStreamFromOffset(totalReceived, remoteStream => {
ReadFromStream(remoteStream, (buffer, bytesRead) => {
localStream.Write(buffer, 0, bytesRead);
totalReceived += bytesRead;
progress(totalReceived, contentLength);
});
});
}
if (totalReceived >= contentLength) {
File.Move(tempPath, finalPath);
atEnd(DownloadStatus.Complete, finalPath);
} else {
atEnd(DownloadStatus.Incomplete, tempPath);
}
}
/// <summary>
/// Start caching the stream.
/// </summary>
/// <param name="targetDspTime">The dsp time at which caching should start. Pass 0 to start as soon as possible.</param>
/// <param name="handler">Optional callback fired when the cache is full.</param>
public void Start( double targetDspTime = 0d, AtEndHandler handler = null )
{
if( _vDoCache || _waiting )
return;
_waiting = true;
_vPosition = 0;
_onEnd = handler;
_targetDspTime = targetDspTime;
_stream.AddAudioThreadStreamClient( this );
}