A la https://github.com/xmartlabs/XLForm

Like this: https://github.com/polatolu/POVoiceHUD

Maybe use AVAudioRecords and updateLevels

Woah, let's do this.

http://nshipster.com/ibinspectable-ibdesignable/

Would like to get this into CocoaPods

See https://github.com/Alamofire/Alamofire

I think you might have a small oversight in the downsampling code:

if (tallyCount == downsampleFactor) {
                sample = tally / tallyCount;
                maximum = maximum > sample ? maximum : sample;
                [fullSongData appendBytes:&sample length:sizeof(sample)];
                tally = 0;
                tallyCount = 0;
                outSamples++;
 }    

maximum is never actually used for anything here or above. Should the append line be amended to the following?

[fullSongData appendBytes:&maximum length:sizeof(maximum)];

Including

• version bump
• changelog // See format at https://github.com/CocoaPods/CocoaPods
• tagging
• CocoaPods push
• carthage build

Or maybe just make better commit like this
CocoaPods/CocoaPods@3832b47

https://github.com/Alamofire/Alamofire/blob/master/CHANGELOG.md

FDWaveformView does not display inside UIScrollView

Version 1.0.1 is not visualizing when trying to play a sound shorter than 2 secs, obviously there is something with the frame calculation since the image frame printed by the console is minus one pixel of width:

(9.0, 6.0, 84.0, 30.0) -- (-0.00151425, 0.0, 0.00151425, 30.0)

Weird thing is that is the same value of the x position.

With 0.3.1 version it works fine.

The example app was supposed to have autolayout but I could not understand it and removed it all.

Would someone like to help automatically place the buttons on the layout so they work well with either orientation and different device sizes.

Page says 1.0.0 but it is not there... if left without number it retrieves version 0.3.1

Any chance of implementing both Pinch-to-Zoom and touch to setProgressSamples?

While profiling the app, I noticed that I was getting an error "FDWaveformView failed to load AVAssetTrack". This was error was being generated when trying to load the OGG file.

I would like to take a video file that was created using the camera and microphone send your code the URL to said file then have it map the audio waveform. I have implemented it and I can see it run apparently with no issues but nothing is drawn into the view. What am I missing?

See https://github.com/fulldecent/FDBarGuage

Should have

lines = cd_stats[:total_lines_of_code].to_f
expectations = cd_stats[:total_test_expectations].to_f
  0.045 < (expectations / lines)

Profile performance of the library for different actual hardware.

Maybe a wiki page with a table in it?

Hey Will.

I'm not sure exactly what you want in terms of specs, but I am running iOS 7.1.2 on an iPhone 4S.

Something I found surprising was that changing the overdraw defines to 1 for all values hardly affected the performance at all -- at most it improved it by 1-2 seconds. Is that expected behavior? I know that was a suggestion you gave to improve performance, so I was surprised it didn't have more of an effect.

A benchmark would definitely be useful. I don't have access to anything better than a 4S right now, so it'd be great to have some way to measure its performance relative to a better phone.

Thanks much,
Dennis

A la this: https://github.com/polatolu/POVoiceHUD

I have a track that's 5s long and it wont' render a waveform on it. It gets stuck in a loop between layoutSubviews and renderAsset. This is causing the problem:
line 181
if (self.image.image.size.width < self.frame.size.width * [UIScreen mainScreen].scale * horizontalMinimumOverdraw)
needToRender = YES;

That always causes it to re-render. If I remove that check, it works fine.

I'm no audio expert by any means, so this might be a silly question: is FDWaveformView supposed to be compatible with M4A files?

When I try to set the audioURL to my M4A file (local file, not streamed) the code crashes as the "tracks" property is an empty array.

--Joao

For a large audio file, update the view incrementally rather than all at once

Say I have a audio file recorded on my device and the user hits play. Can this waveform animate while the sound is playing? Much like how soundcloud does this on the web app or iPhone app.

I found some strange behavior using FDWaveFormView under the simulator (iOS 7.1 and 8). About 1/3 of the time a call to layoutSubviews is being made before the image is loaded, its not the call being initiated from setAudioURL but from somewhere else (initial load or something?).

So it ends up calling renderPNGAudioPictogramLogForAsset with endSamples = 0
and this call

    CMSampleBufferRef sampleBufferRef = [trackOutput copyNextSampleBuffer];

hangs forever; also the renderingInProgress flag never gets set to false so no further updates ever get carried out.

At the beginning of layoutSubviews I added

if (!self.asset || self.renderingInProgress || self.zoomEndSamples == 0)
    return;

and it always works ok. I think zoomEndSamples will never be 0 in a normal situation and from what I could find copyNextSampleBuffer can hang if its sent an empty time range.

I get this issue :library not found for -lFDWaveformView for example project.

http://nshipster.com/documentation/

https://swift.org/documentation/api-design-guidelines/

Hi,

I try to build the project which I install FDWaveformView from pod, and i got file missing.

/Users/joey/Documents/joeycodes/MacDevelop/joey/apps/Firecord/Pods/${BUILT_PRODUCTS_DIR}/FDWaveformView.bundle
building file list ... rsync: link_stat "/Users/joey/Documents/joeycodes/MacDevelop/joey/apps/Firecord/Pods/${BUILT_PRODUCTS_DIR}/FDWaveformView.bundle" failed: No such file or directory (2)
done

sent 29 bytes received 20 bytes 98.00 bytes/sec
total size is 0 speedup is 0.00
rsync error: some files could not be transferred (code 23) at /SourceCache/rsync/rsync-45/rsync/main.c(992) [sender=2.6.9]
Command /bin/sh failed with exit code 23

Please help ..

Please add the support for swift 3.

AFTER Swift update.

Do it all again in Swift

Hi!

I'm trying to set the play progress color as such after the waveform has been rendered and displayed:

-(void)endSliderDidChange
{
  self.waveformView.progressSamples = self.endSlider.value / 7.0 *  self.waveformView.totalSamples;  
}

Not working at all.

I've posted to StackOverflow:
http://stackoverflow.com/questions/29526559/fdwaveformview-set-play-progress-does-not-work

I do use Carthage but I think we should support it.

Can anyone help with this?

See http://www.davidstarke.com/2015/04/waveforms.html

I have an iPhone 4, and I often need to render 30 minute audio files.
I have a 28:29 file, a .m4a at 13.07 MB.
When testing it on my phone, the log says rendering time is 136.788682 seconds.
Ideas?

I managed to get the Waveform to have two separate wavesColor, but I haven't managed to create a multi-colored progressSamples.

For example, if I want the middle 30 samples to be gold (regardless of whether they are included in the progressSamples or not), but the wavesColor to be black and the progressColor to be blue -- how would this be done?

Thank you. I really like the project.

Hello Developer,

I am using this code for create sound waves in my project it is perfectly fine. But as par my requirements I want change waves color, single color to gradient color. like this
http://www.sciencealert.com/images/articles/processed/sound-waves_1024.jpg

and more I think this method help you. please have a look inti this

• (void)plotLogGraph:(NSData *) samplesData
  maximumValue:(Float32) normalizeMax
  mimimumValue:(Float32) normalizeMin
  sampleCount:(NSInteger) sampleCount
  imageHeight:(float) imageHeight
  done:(void(^)(UIImage *image, UIImage *selectedImage))done

Please do helpful.
Regards,
Narender kumar

Trying to debug, but finding that mono audio files don't render. Any suggestions?

Thanks,
John

So I’m back with another feature request!

I’m currently trying to implement multiple waveformviews in the same controller, which with 3 or 4 minute tracks results in a very slow load time on older devices. That said, the AVAssets for the views are hardly ever changing, so it would be much more efficient if when the view is dismissed, the rendered png could be saved, and then on load be restored again. Presumably the view could check to see whether or not the associated avasset was the same one as when rendered just in case something has changed and it needs to re-render.

I was thinking some setable property along the lines of "savesStateWithKey" so that if a waveform had said key, it would load and save the fully zoomed out image using a key chosen by user, whenever it was created/destroyed.

Hope that makes sense?

Im using your demo ios app to show the waves related to this file: https://drive.google.com/file/d/0B898a2Y5OUavQUZUQjNfQlFzSWM/view?usp=sharing

but the output shows the waves in a constant value.
The same file using this web audio editor https://twistedwave.com/ show the correct output

Is there any special configuration that in the demo app to change the output? Thanks

Hi,

I tried to resize the waveform view in the storyboard of the sample project, but the view does not resize when i build and run the app. Is this intentional? Is the size being set in FDWaveformView.m?

Thanks,
Varun

Hi,
Amazing thanks! Had a question. R u planning to add selection? For example I want to select a specific section of the file (using Pan gesture -- UIGestureRecognizerStateBegin and End in handlePanGesture()). So the user can select a section of the file with his finger (pan/touch); of course color the selection differently.
thank you very much

I'm hoping to use colors to signify (1) Progress samples; (2) The remaining samples; and (3) a few selection highlighted gold.

Obviously tasks (1) and (2) are already done -- do you have any suggestions for what I can do to add a third color over various samples?

Thank you -- really love the work.

Is there a way to show the waveform being built during a recording? For example, in the iOS Voice Memos app, as you record, the waveform is built. You don't have to wait until after recording to render the wave form.

See http://nshipster.com/ibinspectable-ibdesignable/

Getting an invalid context error (and no display of the waveform when building in the simulator ios8 SDK). Error looks like this:

CGContextSetBlendMode: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

Any suggestions?

Allowing zooming, or displaying only part of the song.

Some notes on seeking an AVAssetReader are at http://stackoverflow.com/questions/13210684/reading-samples-with-avassetreader-and-timerange-in-real-time

how to get this working for online url music? it only works with saved music but i want it to work with online too, any ideas?

Add unit test and Travis CI for this project. See also: http://docs.travis-ci.com/user/languages/objective-c/

Need to do:

• Create one test case
• Implement Travis CI
• Add "BUILD PASSING" badge to project README.md

Can anyone help with this task?

How do I change the precision of the waveform and the gaps between the lines?

Hey,

I'm using FDWaveformView in my project to play WAV files. Seems to work fine most of the time, but I keep getting these crash reports from users using it in the app store.

NSInvalidArgumentException - *** -[AVAssetReaderTrackOutput initWithTrack:outputSettings:] Output settings are not compatible with media type �

Exact crash line is +[FDWaveformView sliceAndDownsampleAsset:track:startSamples:endSamples:targetSamples:done:] FDWaveformView.m:267

Seems like it's specifying LPCM for output settings... is there a reason why this wouldn't work?

NSDictionary *outputSettingsDict = @{AVFormatIDKey: @(kAudioFormatLinearPCM),
AVLinearPCMBitDepthKey: @16,
AVLinearPCMIsBigEndianKey: @no,
AVLinearPCMIsFloatKey: @no,
AVLinearPCMIsNonInterleaved: @no};

Here's on which OS/devices the crash is happening