How to Convert Mp3 into Pcm Using Audioconverterfillcomplexbuffer in Audiofilestreamopen's Audiofilestream_Packetsproc Callback

Unable to convert mp3 into PCM using AudioConverterFillComplexBuffer in AudioFileStreamOpen's AudioFileStream_PacketsProc callback

Hej @3254523, I have some answers with possible solutions for you. I hope to guide you in the right way in spite of I am not expert in this major. So, the problem is for sure the configuration of:

AudioBufferList

Here the links that probes the hints of this -50 OSStatus related to the AudioBufferList:
http://lists.apple.com/archives/coreaudio-api/2012/Apr/msg00041.html
https://forums.developer.apple.com/thread/6313

Now, we have to focus in a solutions. Looking through your AudioBufferList, you have no assigned any value but mNumberBuffers which is 1. Try to change the values in the following way(as it shown in the second link):

var localPcmBufferList = AudioBufferList(mNumberBuffers: 2, mBuffers: AudioBuffer(mNumberChannels: 2, mDataByteSize: UInt32(buffer.count), mData: &buffer))

If still is not working, we have to focus to correct it properly, hence here you can find the solution to the -50 OSStatus in AudioConverterFillComplexBuffer although not in swift:

AudioConverterFillComplexBuffer return -50 (paramErr)

iPhone: AudioBufferList init and release

AudioConverterFillComplexBuffer return -50 (paramErr)

I was stuck in the same situation (basically after using your code as a template). Solution seems to be in allocation of memory for the AudioBufferList. Implementing this answer did the trick for me (although my objective-C is not good enough to see the exact difference :))

iPhone: AudioBufferList init and release

Here is how I do it:

AudioBufferList *
AllocateABL(UInt32 channelsPerFrame, UInt32 bytesPerFrame, bool interleaved, UInt32 capacityFrames)
{
    AudioBufferList *bufferList = NULL;

    UInt32 numBuffers = interleaved ? 1 : channelsPerFrame;
    UInt32 channelsPerBuffer = interleaved ? channelsPerFrame : 1;

    bufferList = static_cast<AudioBufferList *>(calloc(1, offsetof(AudioBufferList, mBuffers) + (sizeof(AudioBuffer) * numBuffers)));

    bufferList->mNumberBuffers = numBuffers;

    for(UInt32 bufferIndex = 0; bufferIndex < bufferList->mNumberBuffers; ++bufferIndex) {
        bufferList->mBuffers[bufferIndex].mData = static_cast<void *>(calloc(capacityFrames, bytesPerFrame));
        bufferList->mBuffers[bufferIndex].mDataByteSize = capacityFrames * bytesPerFrame;
        bufferList->mBuffers[bufferIndex].mNumberChannels = channelsPerBuffer;
    }

    return bufferList;
}

What's the best way to compare two sheets in an Excel workbook

In Excel VBA, use a Dictionary. Use your items from one of the sheets as keys, QTY as values. Put the item/QTY pairs of sheet 1 into the dictionary, then run through the items of sheet 2 update the dictionary accordingly to get the differences in there. Finally, put the result into sheet 3.

EDIT: here is a complete example in code (you have to set a reference to the Microsoft Scripting runtime to get it working this way):

Option Explicit
Sub CreateDiff()

    Dim dict As New Dictionary
    Dim sh1 As Worksheet, sh2 As Worksheet, sh3 As Worksheet
    Dim i As Long, v As String

    Set sh1 = ThisWorkbook.Sheets("Sheet1")
    Set sh2 = ThisWorkbook.Sheets("Sheet2")
    Set sh3 = ThisWorkbook.Sheets("Sheet3")
    For i = 2 To sh1.Cells.SpecialCells(xlCellTypeLastCell).Row
        v = Trim(sh1.Cells(i, 1).Value)
        dict(v) = -sh1.Cells(i, 2).Value
    Next
    For i = 2 To sh2.Cells.SpecialCells(xlCellTypeLastCell).Row
        v = Trim(sh2.Cells(i, 1).Value)
        If dict.Exists(v) Then
            dict(v) = dict(v) + sh2.Cells(i, 2).Value
        Else
            dict(v) = sh2.Cells(i, 2).Value
        End If
    Next
    For i = 0 To dict.Count - 1
        v = dict.Keys(i)
        sh3.Cells(i + 2, 1) = v
        sh3.Cells(i + 2, 2) = dict(v)
    Next

End Sub

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