/// <summary>
/// Exports <c>this</c> to a given destination <see cref="Presentation"/>
/// </summary>
/// <param name="destPres">The given destination presentation</param>
/// <returns>The exported wav audio media data</returns>
protected override MediaData ExportProtected(Presentation destPres)
{
WavAudioMediaData expWAMD = destPres.MediaDataFactory.Create <WavAudioMediaData>();
expWAMD.PCMFormat = PCMFormat.Copy();
// it is better to export at the level of asset stream and leave the clip composition behind
// exporting clips also exports the shared DataProvider multiple times, which increases the size exponentially
Stream stream = this.OpenPcmInputStream();
try
{
expWAMD.AppendPcmData(stream, null);
}
finally
{
stream.Close();
}
//foreach (WavClip clip in mWavClips)
//{
//expWAMD.mWavClips.Add(clip.Export(destPres));
//}
return(expWAMD);
}
public WavAudioMediaData Copy(Time timeBegin, Time timeEnd)
{
if (timeBegin == null || timeEnd == null)
{
throw new exception.MethodParameterIsNullException("Clip begin or clip end can not be null");
}
if (
timeBegin.IsLessThan(Time.Zero) ||
timeEnd.IsLessThan(Time.Zero) ||
(timeEnd.IsGreaterThan(Time.Zero) && timeBegin.IsGreaterThan(timeEnd)) ||
timeEnd.IsGreaterThan(AudioDuration))
{
throw new exception.MethodParameterIsOutOfBoundsException(
String.Format("The given clip times are not valid, must be between 00:00:00.000 and {0} ([{1} --> {2})",
AudioDuration, timeBegin, timeEnd));
}
WavAudioMediaData copy = Copy();
if (timeEnd.IsGreaterThan(Time.Zero) && timeEnd.IsLessThan(AudioDuration))
{
copy.RemovePcmData(timeEnd, AudioDuration);
}
if (timeBegin.IsGreaterThan(Time.Zero))
{
copy.RemovePcmData(Time.Zero, timeBegin);
}
return(copy);
}
/// <summary>
/// Merges <c>this</c> with a given other <see cref="AudioMediaData"/>,
/// appending the audio data of the other <see cref="AudioMediaData"/> to <c>this</c>,
/// leaving the other <see cref="AudioMediaData"/> without audio data
/// </summary>
/// <param name="other">The given other AudioMediaData</param>
/// <exception cref="exception.MethodParameterIsNullException">
/// Thrown when <paramref name="other"/> is <c>null</c>
/// </exception>
/// <exception cref="exception.InvalidDataFormatException">
/// Thrown when the PCM format of <c>this</c> is not compatible with that of <paramref name="other"/>
/// </exception>
public override void MergeWith(AudioMediaData other)
{
if (other == this)
{
throw new exception.OperationNotValidException("Can not merge a AudioMediaData with itself");
}
if (other is WavAudioMediaData)
{
if (!PCMFormat.Data.IsCompatibleWith(other.PCMFormat.Data))
{
throw new exception.InvalidDataFormatException(
"Can not merge this with a WavAudioMediaData with incompatible audio data");
}
Time thisInsertPoint = AudioDuration;
WavAudioMediaData otherWav = (WavAudioMediaData)other;
mWavClips.AddRange(otherWav.mWavClips);
Time dur = otherWav.AudioDuration;
NotifyAudioDataInserted(this, thisInsertPoint, dur);
otherWav.RemovePcmData(Time.Zero);
}
else
{
base.MergeWith(other);
}
}
/// <summary>
/// Part of technical solution to make copy method return correct type.
/// In implementing classes this method should return a copy of the class instances
/// </summary>
/// <returns>The copy</returns>
protected override MediaData CopyProtected()
{
WavAudioMediaData copy = Presentation.MediaDataFactory.Create <WavAudioMediaData>();
copy.PCMFormat = PCMFormat.Copy();
foreach (WavClip clip in mWavClips)
{
copy.mWavClips.Add(clip.Copy());
}
return(copy);
}
public void InsertPcmData(WavAudioMediaData mediaData, Time insertPoint, Time duration)
{
Time movingInsertPoint = insertPoint.Copy();
Time remainingAvailableDuration = duration.Copy();
foreach (WavClip wavClip in mediaData.mWavClips)
{
Time wavClipDur = wavClip.Duration;
if (wavClipDur.IsLessThan(remainingAvailableDuration) ||
wavClipDur.IsEqualTo(remainingAvailableDuration))
{
InsertPcmData(wavClip.Copy(), movingInsertPoint, wavClipDur);
movingInsertPoint.Add(wavClipDur);
remainingAvailableDuration.Substract(wavClipDur);
if (remainingAvailableDuration.IsLessThan(Time.Zero) ||
remainingAvailableDuration.IsEqualTo(Time.Zero))
{
break;
}
}
else
{
WavClip smallerClip = wavClip.Copy();
smallerClip.ClipEnd = smallerClip.ClipBegin.Copy();
smallerClip.ClipEnd.Add(remainingAvailableDuration);
InsertPcmData(smallerClip, movingInsertPoint, remainingAvailableDuration);
//Stream stream = wavClip.OpenPcmInputStream(Time.Zero,
// new Time(wavClip.ClipBegin.AsTimeSpan + remainingAvailableDuration.AsTimeSpan));
//try
//{
// InsertPcmData(stream, movingInsertPoint, remainingAvailableDuration);
//}
//finally
//{
// stream.Close();
//}
break;
}
}
}
public override bool ValueEquals(WithPresentation other)
{
if (!base.ValueEquals(other))
{
return(false);
}
WavAudioMediaData otherz = other as WavAudioMediaData;
if (otherz == null)
{
return(false);
}
//Here we do not compare the WavClip/FileDataProvider equality. Instead, we let the super class compare the resulting streams of PCM data.
//See AudioMediaData.ValueEquals();
return(true);
}
/// <summary>
/// Splits the audio media data at a given split point in time,
/// <c>this</c> retaining the audio before the split point,
/// creating a new <see cref="WavAudioMediaData"/> containing the audio after the split point
/// </summary>
/// <param name="splitPoint">The given split point</param>
/// <returns>A audio media data containing the audio after the split point</returns>
/// <exception cref="exception.MethodParameterIsNullException">
/// Thrown when the given split point is <c>null</c>
/// </exception>
/// <exception cref="exception.MethodParameterIsOutOfBoundsException">
/// Thrown when the given split point is negative or is beyond the duration of <c>this</c>
/// </exception>
public override AudioMediaData Split(Time splitPoint)
{
if (splitPoint == null)
{
throw new exception.MethodParameterIsNullException(
"The split point can not be null");
}
if (splitPoint.IsNegative)
{
throw new exception.MethodParameterIsOutOfBoundsException(
"The split point can not be negative");
}
if (splitPoint.IsGreaterThan(AudioDuration))
{
throw new exception.MethodParameterIsOutOfBoundsException(
String.Format(
"Split point {0} is beyond the WavAudioMediaData end - audio length is {1}",
splitPoint, AudioDuration));
}
WavAudioMediaData oWAMD =
Presentation.MediaDataFactory.Create <WavAudioMediaData>();
if (oWAMD == null)
{
throw new exception.FactoryCannotCreateTypeException(String.Format(
"Thrown if the MediaDataFactory can not create a WacAudioMediaData matching Xuk QName {1}:{0}",
GetXukName(), GetXukNamespace()));
}
oWAMD.PCMFormat = PCMFormat.Copy();
Time originalDuration = AudioDuration;
Time newClipDuration = AudioDuration.GetDifference(splitPoint);
Time curClip_Begin = Time.Zero;
List <WavClip> clips = new List <WavClip>(mWavClips);
mWavClips.Clear();
oWAMD.mWavClips.Clear();
for (int i = 0; i < clips.Count; i++)
{
WavClip curClip = clips[i];
Time savedCurClipDuration = curClip.Duration;
Time curClip_End = new Time(curClip_Begin.AsTimeSpanTicks + curClip.Duration.AsTimeSpanTicks, true);
if (splitPoint.IsLessThanOrEqualTo(curClip_Begin))
{
oWAMD.mWavClips.Add(curClip);
}
else if (splitPoint.IsLessThan(curClip_End))
{
WavClip secondPartClip = new WavClip(
curClip.DataProvider,
curClip.ClipBegin,
curClip.IsClipEndTiedToEOM ? null : curClip.ClipEnd);
curClip.ClipEnd = new Time(curClip.ClipBegin.AsTimeSpanTicks + (splitPoint.AsTimeSpanTicks - curClip_Begin.AsTimeSpanTicks), true);
secondPartClip.ClipBegin = curClip.ClipEnd.Copy();
mWavClips.Add(curClip);
oWAMD.mWavClips.Add(secondPartClip);
}
else
{
mWavClips.Add(curClip);
}
curClip_Begin.Add(savedCurClipDuration);
}
NotifyAudioDataRemoved(this, splitPoint, newClipDuration);
oWAMD.NotifyAudioDataInserted(oWAMD, Time.Zero, newClipDuration);
#if DEBUG
DebugFix.Assert(AudioLibPCMFormat.TimesAreEqualWithMillisecondsTolerance(
newClipDuration.AsLocalUnits,
oWAMD.AudioDuration.AsLocalUnits));
DebugFix.Assert(newClipDuration.IsEqualTo(oWAMD.AudioDuration));
DebugFix.Assert(AudioLibPCMFormat.TimesAreEqualWithMillisecondsTolerance(
this.AudioDuration.AsLocalUnits + oWAMD.AudioDuration.AsLocalUnits,
originalDuration.AsLocalUnits));
Time copy = this.AudioDuration.Copy();
copy.Add(oWAMD.AudioDuration);
DebugFix.Assert(originalDuration.IsEqualTo(copy));
#endif //DEBUG
return(oWAMD);
}
