public void InsertAsset(IAudioMediaAsset chunk, double time)
{
// checks if audio formats of original asset and chunk asset are of same formats
if (CompareAudioAssetFormat(this, chunk) == true && time <= m_dAudioLengthInTime && time >= 0)
{
// creates the temporary blank asset
AudioMediaAsset ob1 = new AudioMediaAsset(this.Channels, this.BitDepth, this.SampleRate);
// if Chunk is to be inserted somewhere in between of original asset
if (time > -0 && time < m_dAudioLengthInTime)
{
// copies part of original asset before insertion time to temporary ob1 asset
ob1 = GetChunk(0, time) as AudioMediaAsset;
// merges the chunk to temp ob1 asset
ob1.MergeWith(chunk);
// copies part of original assetafter insertion time to temporary ob2 asset
AudioMediaAsset ob2 = GetChunk(time, this.LengthInMilliseconds) as AudioMediaAsset;
// merge ob2 at back of ob1 so as to finalise ob1
ob1.MergeWith(ob2);
}
// if chunk asset is to be placed before original asset
else if (time == 0)
{
// points chunk to ob1 and merge original asset at back of ob1
ob1 = chunk as AudioMediaAsset;
ob1.MergeWith(this);
}
// clears clip list of original asset and copy clips in clip list of ob1 to it
m_alClipList.Clear();
for (int i = 0; i < ob1.m_alClipList.Count; i++)
{
m_alClipList.Add(ob1.m_alClipList [i]);
}
m_dAudioLengthInTime = ob1.LengthInMilliseconds;
m_lAudioLengthInBytes = ob1.AudioLengthInBytes;
m_lSizeInBytes = ob1.SizeInBytes;
// if Chunk is to be appended to original asset
if (time == m_dAudioLengthInTime)
{
MergeWith(chunk);
}
} // end of main format check
else
{
throw new Exception("Incompatible format or Insertion time not in asset range");
}
// end of insert chunk function
}
public IAudioMediaAsset DeleteChunk(double beginTime, double endTime)
{
// checks if beginTime and EndTime is within bounds of asset and are in order
if (beginTime >= 0 && beginTime < endTime && endTime <= m_dAudioLengthInTime)
{
// create new asset from original asset from part which has to be deleted and keep for returning back
AudioMediaAsset ob_NewAsset = GetChunk(beginTime, endTime) as AudioMediaAsset;
// create two temp assets for holding clips in front of BeginTime and a asset to hold Clips after endTime
AudioMediaAsset ob_FromtAsset = new AudioMediaAsset(m_Channels, m_BitDepth, m_SamplingRate);
AudioMediaAsset ob_RearAsset = new AudioMediaAsset(m_Channels, m_BitDepth, m_SamplingRate);
// if deletion part lies somewhere in between body of asset
if (beginTime != 0 && endTime != m_dAudioLengthInTime)
{
// Copy respective clips to Front and Rear Assets and merge them
ob_FromtAsset = GetChunk(0, beginTime) as AudioMediaAsset;
ob_RearAsset = GetChunk(endTime, m_dAudioLengthInTime) as AudioMediaAsset;
ob_FromtAsset.MergeWith(ob_RearAsset);
}
// if deletion is from in between to end of asset
else if (beginTime != 0)
{
// copies only front part of asset
ob_FromtAsset = GetChunk(0, beginTime) as AudioMediaAsset;
}
// if Deletion is in front including start
else if (endTime != m_dAudioLengthInTime)
{
// copies end part of asset to front asset
ob_FromtAsset = GetChunk(endTime, m_dAudioLengthInTime) as AudioMediaAsset;
}
// replaces clip list of original asset with clip list of front asset
m_alClipList = ob_FromtAsset.m_alClipList;
m_dAudioLengthInTime = ob_FromtAsset.LengthInMilliseconds;
m_lAudioLengthInBytes = ob_FromtAsset.AudioLengthInBytes;
m_lSizeInBytes = ob_FromtAsset.SizeInBytes;
ob_FromtAsset = null;
return(ob_NewAsset);
}
else
{
throw new Exception("Invalid input parameters");
}
}