> On Dec 10, 2018, at 7:29 PM, Carl Eugen Hoyos <[email protected]> wrote:
>
> 2018-12-11 1:07 GMT+01:00, Ronak <[email protected]>:
>> Hey guys,
>>
>> I'm trying to use the dynaudnorm and earwax filters in my iPhone app, and
>> I've noticed that the dynaudnorm filter wants to resample the audio.
>>
>> Is there any way to avoid resampling the audio? What format does the filter
>> expect the input to be?
>
> The dynaudnorm filter only accepts planar double, the earwax filter only
> packed s16.
Ok thanks. I tried to use this filter in my iOS code; but I'm getting errors
with an error code -35.
This is my code that tries to write data into the filter graph and reads it
back; what am I doing wrong?
private func filterBuffer(_ inputBuffer: UnsafeMutableAudioBufferListPointer,
frameCount: UInt32, outputBuffer: UnsafeMutableAudioBufferListPointer) throws {
// copy the pointers to the audio buffer into the frame for manipulation
// each buffer represents the audio per channel
for index in 0..<inputBuffer.count {
let dataByteSize = Int(inputBuffer[index].mDataByteSize)
let buffer = inputBuffer[index].mData?.bindMemory(to: UInt8.self,
capacity: dataByteSize)
inputAudioFrame?.pointee.extended_data[index] = buffer
}
// write the audio frame into the audioInputContext so it can be filtered
let writeResult = av_buffersrc_write_frame(audioInputContext,
inputAudioFrame)
if writeResult == 0 {
// pull the filtered audio out of the audioOutputContext
let pullResult = av_buffersink_get_frame(audioOutputContext,
outputAudioFrame)
if pullResult >= 0 {
let filteredAudioBufferData = outputAudioFrame?.pointee.extended_data
// copy the pointers to the filtered audio into the output buffers
for index in 0..<outputBuffer.count {
outputBuffer[index].mData =
UnsafeMutableRawPointer(filteredAudioBufferData?[index])
}
} else {
// the audio couldn't be filtered properly, throw an error
throw PlayerError.filterFailure([:])
}
} else {
// the audio couldn't be filtered properly, throw an error
throw PlayerError.filterFailure([:])
}
}
Thanks,
Ronak
>
> Carl Eugen
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