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Fixed voice message encoding issue that resulted in malformed ogg files causing playback errors on ffmpeg v4

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This commit is contained in:
Ilya Laktyushin 2019-08-02 05:28:03 +03:00
parent ee3142966e
commit f3901f6dc4
2 changed files with 48 additions and 52 deletions
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2
submodules/TelegramUI/TelegramUI/Bridge Audio/TGBridgeAudioEncoder.m
View File

@ -178,7 +178,7 @@ static const int encoderPacketSizeInBytes = TGBridgeAudioEncoderSampleRate / 100
if (_assetReader.status == AVAssetReaderStatusCompleted)
{
NSLog(@"finished");
if (_oggWriter != nil && [_oggWriter writeFrame:NULL frameByteCount:0])
if (_oggWriter != nil)
{
dataItemResult = _tempFileItem;
durationResult = [_oggWriter encodedDuration];

98
submodules/TelegramUI/TelegramUI/ManagedAudioRecorder.swift
View File

@ -557,7 +557,7 @@ final class ManagedAudioRecorderContext {
self.currentPeak = max(Int64(sample), self.currentPeak)
self.currentPeakCount += 1
if self.currentPeakCount == self.peakCompressionFactor {
var compressedPeak = self.currentPeak//Int16(Float(self.currentPeak) / Float(self.peakCompressionFactor))
var compressedPeak = self.currentPeak
withUnsafeBytes(of: &compressedPeak, { buffer in
self.compressedWaveformSamples.append(buffer.bindMemory(to: UInt8.self))
})
@ -592,57 +592,53 @@ final class ManagedAudioRecorderContext {
}
func takeData() -> RecordedAudioData? {
if self.oggWriter.writeFrame(nil, frameByteCount: 0) {
var scaledSamplesMemory = malloc(100 * 2)!
var scaledSamples: UnsafeMutablePointer<Int16> = scaledSamplesMemory.assumingMemoryBound(to: Int16.self)
defer {
free(scaledSamplesMemory)
}
memset(scaledSamples, 0, 100 * 2);
var waveform: Data?
let count = self.compressedWaveformSamples.count / 2
self.compressedWaveformSamples.withUnsafeMutableBytes { (samples: UnsafeMutablePointer<Int16>) -> Void in
for i in 0 ..< count {
let sample = samples[i]
let index = i * 100 / count
if (scaledSamples[index] < sample) {
scaledSamples[index] = sample;
}
}
var peak: Int16 = 0
var sumSamples: Int64 = 0
for i in 0 ..< 100 {
let sample = scaledSamples[i]
if peak < sample {
peak = sample
}
sumSamples += Int64(sample)
}
var calculatedPeak: UInt16 = 0
calculatedPeak = UInt16((Double(sumSamples) * 1.8 / 100.0))
if calculatedPeak < 2500 {
calculatedPeak = 2500
}
for i in 0 ..< 100 {
let sample: UInt16 = UInt16(Int64(scaledSamples[i]))
let minPeak = min(Int64(sample), Int64(calculatedPeak))
let resultPeak = minPeak * 31 / Int64(calculatedPeak)
scaledSamples[i] = Int16(clamping: min(31, resultPeak))
}
let resultWaveform = AudioWaveform(samples: Data(bytes: scaledSamplesMemory, count: 100 * 2), peak: 31)
let bitstream = resultWaveform.makeBitstream()
waveform = AudioWaveform(bitstream: bitstream, bitsPerSample: 5).makeBitstream()
}
return RecordedAudioData(compressedData: self.dataItem.data(), duration: self.oggWriter.encodedDuration(), waveform: waveform)
} else {
return nil
var scaledSamplesMemory = malloc(100 * 2)!
var scaledSamples: UnsafeMutablePointer<Int16> = scaledSamplesMemory.assumingMemoryBound(to: Int16.self)
defer {
free(scaledSamplesMemory)
}
memset(scaledSamples, 0, 100 * 2);
var waveform: Data?
let count = self.compressedWaveformSamples.count / 2
self.compressedWaveformSamples.withUnsafeMutableBytes { (samples: UnsafeMutablePointer<Int16>) -> Void in
for i in 0 ..< count {
let sample = samples[i]
let index = i * 100 / count
if (scaledSamples[index] < sample) {
scaledSamples[index] = sample;
}
}
var peak: Int16 = 0
var sumSamples: Int64 = 0
for i in 0 ..< 100 {
let sample = scaledSamples[i]
if peak < sample {
peak = sample
}
sumSamples += Int64(sample)
}
var calculatedPeak: UInt16 = 0
calculatedPeak = UInt16((Double(sumSamples) * 1.8 / 100.0))
if calculatedPeak < 2500 {
calculatedPeak = 2500
}
for i in 0 ..< 100 {
let sample: UInt16 = UInt16(Int64(scaledSamples[i]))
let minPeak = min(Int64(sample), Int64(calculatedPeak))
let resultPeak = minPeak * 31 / Int64(calculatedPeak)
scaledSamples[i] = Int16(clamping: min(31, resultPeak))
}
let resultWaveform = AudioWaveform(samples: Data(bytes: scaledSamplesMemory, count: 100 * 2), peak: 31)
let bitstream = resultWaveform.makeBitstream()
waveform = AudioWaveform(bitstream: bitstream, bitsPerSample: 5).makeBitstream()
}
return RecordedAudioData(compressedData: self.dataItem.data(), duration: self.oggWriter.encodedDuration(), waveform: waveform)
}
}