/// <summary>
/// Fires the <see cref="PCMFormatChanged"/> event
/// </summary>
/// <param name="source">The source, that is the <see cref="AudioMediaData"/> whoose <see cref="PCMFormatInfo"/> has changed</param>
/// <param name="newFormat">The new value</param>
/// <param name="prevFormat">The value prior to the change</param>
protected void NotifyPCMFormatChanged(AudioMediaData source, PCMFormatInfo newFormat, PCMFormatInfo prevFormat)
{
EventHandler <events.media.data.audio.PCMFormatChangedEventArgs> d = PCMFormatChanged;
if (d != null)
{
d(this, new urakawa.events.media.data.audio.PCMFormatChangedEventArgs(source, newFormat, prevFormat));
}
}
private void TestRoundTrim(PCMFormatInfo info)
{
StringBuilder sb = new StringBuilder();
XmlWriter wr = XmlWriter.Create(sb);
info.XukOut(wr, new Uri(System.IO.Directory.GetCurrentDirectory()), null);
wr.Close();
PCMFormatInfo realodedInfo = new PCMFormatInfo();
XmlReader rd = XmlReader.Create(new System.IO.StringReader(sb.ToString()));
rd.ReadToFollowing(info.XukLocalName, info.XukNamespaceUri);
realodedInfo.XukIn(rd, null);
Assert.IsTrue(info.ValueEquals(realodedInfo));
}
/// <summary>
/// Update the audio properties of the presentation, if possible. Return true on success.
/// </summary>
public bool UpdatePresentationAudioProperties(int channels, int bitDepth, int sampleRate)
{
try
{
//sdk2
urakawa.media.data.audio.PCMFormatInfo defaultPCMFormat = new urakawa.media.data.audio.PCMFormatInfo((ushort)channels, (uint)sampleRate, (ushort)bitDepth);
MediaDataManager.DefaultPCMFormat = defaultPCMFormat;
MediaDataManager.EnforceSinglePCMFormat = true;
return(true);
}
catch
{
return(false);
}
}
public void XukIn_XukOut_RoundTrim()
{
PCMFormatInfo pcmInfo;
pcmInfo = new PCMFormatInfo(1, 44100, 16);
TestRoundTrim(pcmInfo);
pcmInfo = new PCMFormatInfo(1, 22050, 16);
TestRoundTrim(pcmInfo);
pcmInfo = new PCMFormatInfo(2, 44100, 16);
TestRoundTrim(pcmInfo);
pcmInfo = new PCMFormatInfo(2, 22050, 16);
TestRoundTrim(pcmInfo);
pcmInfo = new PCMFormatInfo(1, 44100, 8);
TestRoundTrim(pcmInfo);
pcmInfo = new PCMFormatInfo(1, 22050, 8);
TestRoundTrim(pcmInfo);
}
private void Duration_DataLength_RoundTrip(PCMFormatInfo pcmInfo)
{
Random rnd = new Random();
uint ba = pcmInfo.Data.BlockAlign;
for (int i = 0; i < 20480; i++)
{
uint dl = (uint)Math.Round(rnd.NextDouble() * UInt32.MaxValue);
dl -= dl % ba;
//uint roundI = pcmInfo.Data.GetDataLength(pcmInfo.Data.GetDuration(dl));
uint roundI = (uint)pcmInfo.Data.ConvertTimeToBytes(pcmInfo.Data.ConvertBytesToTime(dl));
Assert.AreEqual(
dl,
roundI,
"Wrong round trip data langth value");
}
}
public void Duration_DataLength_RoundTrip()
{
PCMFormatInfo pcmInfo = new PCMFormatInfo();
pcmInfo.Data.BitDepth = 16;
pcmInfo.Data.NumberOfChannels = 1;
pcmInfo.Data.SampleRate = 22050;
Duration_DataLength_RoundTrip(pcmInfo);
pcmInfo.Data.BitDepth = 16;
pcmInfo.Data.NumberOfChannels = 1;
pcmInfo.Data.SampleRate = 44100;
Duration_DataLength_RoundTrip(pcmInfo);
pcmInfo.Data.BitDepth = 8;
pcmInfo.Data.NumberOfChannels = 2;
pcmInfo.Data.SampleRate = 22050;
Duration_DataLength_RoundTrip(pcmInfo);
}
/// <summary>
/// Determines if a PCM Format change is ok
/// </summary>
/// <param name="newFormat">The new PCM Format value - assumed not to be <c>null</c></param>
/// <param name="failReason">The <see cref="string"/> to which a failure reason must be written in case the change is not ok</param>
/// <returns>A <see cref="bool"/> indicating if the change is ok</returns>
protected virtual bool IsPCMFormatChangeOk(PCMFormatInfo newFormat, out string failReason)
{
if (OriginalRelativePath != null && DataProvider != null)
{
throw new NotImplementedException();
}
failReason = "";
if (Presentation.MediaDataManager.EnforceSinglePCMFormat &&
!Presentation.MediaDataManager.DefaultPCMFormat.Data.IsCompatibleWith(newFormat.Data))
{
failReason =
"When the MediaDataManager enforces a single PCM Format, "
+ "the PCM Format of the AudioMediaData must match the default defined by the manager";
return(false);
}
return(true);
}
