I want to develop an app that lets one intercept raw audio data sent for playback (possibly by a different app), and apply audio enhancements over this raw data.Does Cupcake allow such filtering of audio data? If so, which API should I use? I understand this may not be possible at an application level for security reasons.I'm trying to see if this is possible with native code linking to public or private API of Android.
View 3 Replies
The application allowed its users to control the volume of the artist; even mute it.How is this possible?Does adjusting artist sound/setting equalizer etc. mean performing some transformation of required frequencies? What sort of mathematics is required here(frequency domain transformations)?The application recorded users voice input via a mic. Assuming that the sound is recorded in some format, the application was able to mix the recording with the karaoke track(with artists voice muted). How can this be done?Did they play both the track and voice recording simultaneously? Or maybe they inserted additional frequency(channel?) in the original track, maybe replaced it?What sort of DSP is involved here? Is this possible in Java, Objective C?
View 1 Replies View RelatedI'm trying to figure out how to write an app that can decode audio morse code on the fly. I found this document which explains how to record audio from the microphone in Android. What I'd like to know is whether it's possible to access the raw input from the microphone or whether it has to be written/read to a file.
View 3 Replies View RelatedIs it only possible for one object to access the microphone at a time? That is, could I simultaneously use an AudioRecord to do some audio processing and use a MediaRecorder to record the incoming audio?
View 2 Replies View RelatedI am confused on how to implement image processing algorithm on JPEG data.I have set P.setpicturesize (640,480) so the camera.takepicture (null,null,Imagecapture callbck) returns the image data. Void onPictureTaken(byte[] data, Camera Camera) returns JPEG data, but(x = data.length), the value of x is less than 640*480 bytes.Please kindly let me know how can I start editing pixel information of the image and image comparison algorithms.
View 2 Replies View RelatedI am streaming an MP3 audio and instead making this MP3 audio to play, I want it to be converted to PCM format and pass this PCM audio to AudioTrack(as it takes PCM data as input.) instead of passing my MP3 stream to MediaPlayer. Can anyone please help me to convert the MP3 to PCM stream?
View 3 Replies View RelatedFirst of all, sorry for my bad english. I'm new into Android application development, just experimenting with the emulator and the SDK. I have searched with some keywords on the developer group, but i didn't find what i need. I'm searching for classes which with i can do simple audio DSP on locally stored audio files. e.g. i like to do crossfade/overlap on MP3 files, and an overall automatic gain control/ equalization on the realtime mix . As i see i can use the AudioTrack class to send raw PCM data to the audio hardware, so i could implement the DSP in java, but i don't see any way to use the internal decoders to grab decoded PCM frames from encoded audio files (like MP3, OGG, AAC). I thought about using Java decoder implementations like JLayer to do the decoding but that's a very CPU intensive approach which is not good for e.g. a media player application which runs in the background. Is there any classes for using the platforms builtin decoders, or should i "port" some available decoders with NDK to my application?
View 5 Replies View RelatedI am working on a packet switched network. I want to capture the audio data from mic into a buffer at a desired sample rate.How can I capture the audio data from mic into a buffer instead of a file? Also how can I control the audio capture rate as per the desired sample rate?
View 2 Replies View RelatedI am trying to write a streaming application.I have my own decoder and I am playing PCM audio using AudioTrack. At any point in time I want to know how much data is buffered with the device. I want to use this so that if the data with the device go below a level, I want to go into a buffering mode where I will buffer 2-3 seconds of data before continuing playback again. Can someone please tell me how to do this?
View 5 Replies View RelatedI've been trying to understand how to get data about all the audio files in the device using MediaAudio but unfortunately the documentation is far from clear. Also, thereīs almost nothing about it on the forum right now and I couldnīt find good resources over the internet.
Iīve seen pretty quick and objective examples on how to access the main information from the containers but I couldnīt find in any place how I could get the names of the tracks (MediaStore.Audio.AudioColumns doesnīt have an specific constant for it) and the most important, how I could retrieve the path for the media (audio file in this case) Iīve found using the info on MusicStore.Audio.
am I missing something here? It seems it should be so easy but I canīt find the info! Also if I change any data on the container, will this data be also changed in the real file as well?
You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Just taken delivery of a UK edition Samsung Galaxy S. Connecting it to my car audio via bluetooth no problems but it drops the 3G/H network connection as soon as it connects to the car. Disconnect the Bluetooth and I get the data connection back. Is this deliberate or a bug? It means I can't receive emails etc whilst in my car unless I turn off Bluetooth.
View 1 Replies View RelatedWe are supposed to cache textual and audio data in our application until device is booted or maximum of two days, whichever happens earlier. To get a perspective on data to be cached, note that we are to store about 200 text headers containing around 10 fields, each of length 30 bytes and about 20 sound files each about a minute long.We are getting the textual data by parsing XMLs and then we keep them in ArrayLists. The sound files are directly written inside the app storage using File I/O (and not on SDcard or Apps Cache directory).This application is to be run on devices running Android 1.5 or later.I understand, and please correct me if I am wrong, that we can cache the files either on SDcard or inside the application or inside applications Cache directory.
View 2 Replies View RelatedShort version: What is the best way to get data encoded in an MP3 (and ideally in an AAC/Ogg/WMA) into a Java array or ByteBuffer that I can then manipulate?I'm putting together a program that has slowing down and speeding up sound files as one of its features. This works fine for WAV files,which are a header plus the exact binary data that needs to be sent to the speaker, and now I need to implement it for MP3 (ideally, this would also support AAC, Ogg, and WMA, but since those are less popular formats this is not required). Android does not expose an interface to decode the MP3 without playing it, so I need to create that
interface.
I want to know that android has a touchscreen requirement about hardware and software.And how does touch gesture processing where, for example, in driver layer or framework or application,
View 4 Replies View RelatedI'm trying to write an XML parser that takes an RSS feed & fetches the image urls shown in the url attribute of the <media:thumbnail> tag. This is all being done via android.Util.Xml, & is an adaptation of the code shown here. An example RSS feed that I'm trying to use is the BBC News RSS feed. However, media is an additional namespace & (probably) as a result my parser isn't working as it should. A version of my parse method is below. Is there any (no doubt simple) way to get my list of image URLs working?
..................
Currently, I use a regular activity with some EditText fields as a registration screen in my application.The inputs are used to construct a soap message which is posted to the registration server, with the response being parsed to do some configuration of the application.I'd like to change this to have the registration page load in a WebView instance, so that the registration process takes place on an external web page.This would make it easier to make changes to the registration process without having to deploy a new build, as it would just be a matter of changing the web page that is loaded in the WebView.The question is would there be any way for me to get the response that is sent back from my registration server to the client? From what I can tell, if I went this route, there wouldn't be a way for me to parse the response like I currently do to initialize the application settings.
View 2 Replies View Related"Note that when you write an activity, you can make it stop or continue running when it is moved to the background (see onStop() in Activity Lifecycle). For activities that download data from the network, it's recommended to let them continue downloading so the user can multi-task." As far as I was aware I had to create a service if I wanted to have a background activity such as a media player, internet download, or processing of data in files on the SD card continue when the activity was no longer in the foreground.I went and reread the onStop information on the "Activity Lifecycle" page, which was referred to. But I didn't find any mention of how an activity might continue to run in the background after onStop was called.
View 3 Replies View RelatedI am creating a custom Widget which extends SurfaceView and I am planning to use it for camera preview.In the main activity I tried to implement some event listeners but can't catch any event.If I press a button the LogCat outputs "Continuing to wait for key to be dispatched" line.Does anyone know how to implement event listeners in main activity using SurfaceView classes?
View 3 Replies View RelatedMy android app was running ok under Eclipse, then I tried to add some GridView sample code from some online examples and now it will not build/run anymore.
I keep getting the major error:
CODE:..
Attempt to include a core VM class in something other than a core library.
I have never put anything to do with 'SocketFactory' in any of my code. I searched all of my code and can't find any code that I did that contains the SocketFactory.class.
I deleted my xml's and classes that I was working on that had to do with the GridView and reverted back to the code I had before, when it was running - but now I continue to get the above error. I even try to use 'Clean' but the error continues. Does anyone know what I should do about this error?
I want to perform various image processing functions such as threshold,equalize etc on the image i capture from the camera...What should i use in order to do that?
Also,when i installed the app in my phone, after clicking the pic, the next screen appears, and after clicking the button for performing other functions, force close comes up...what could be the reason,because my code works fine without the camera portion...
Processing has Android support and it seems to be pretty awesome from my 10 minutes of playing with it. But I would like to make a regular (nongraphics) application like a twitter feed reader or something. So is there something like Processing that can do regular apps? Besides Titanium.Basically I am looking for anything that will make coding for android easier, processing was so easy to get working that I was very happy with it, but it is for graphics only. Titanium didn't give me the same wow factor and it isn't open so that kind of takes away from it. What other tools are out there?
View 2 Replies View RelatedI'm writing an application for Android. I need to make some image processing on the picture taken from camera.I use Camera.PictureCallback to get the photo, and I get picture in byte array.The problem is I want to make operations on every pixel of photo (some filtering and other stuff) so I guess, have photo in byte array is not a bad idea. But I don't know how interpret information in this byte array... The only way I know to make the processing is use BitmapFactory.decodeByteArray() and then use Bitmap object. Is this a good way to handle a lot of image processing?
View 1 Replies View RelatedI am trying to decode and obtain all frames in a video stream, each of which would be processed by a native signal processing engine and re-encoded back to a MPEG4/MP4 file. I noticed that there was a getFrameAt() function in earlier versions of SDK but its not available in v 1.6 on which I am working. As I am fairly new to Android, I would like to know from more experienced people around here as to how I can extract video frames into a buffer for processing.
View 2 Replies View RelatedI am developing a mobile application that involves complex image processing operations. The app is designed in Java while the core image processing ops are implemented in native code, and compiled using the Android NDK.Now, I know that native code will *not* yield any significant performance improvement over Java code, and that the NDK purpose is only to support re-use of code libs (or to quickly integrate legacy code).are there any resources/tips-n-tricks/white papers/ samples on optimizing image processing algorithms for Android? To be even more specific, I am looking out for optimizing memory operations (cache misses, memory stalls, etc.). I profiled my application code and came to the conclusion that memory issues are causing the *maximum* performance penalty. (Nothing surprising over there, it is expected, but just verified with profile data as well).
View 1 Replies View RelatedI am writing a simple Android app and have a database that will send back information into the app. I am new to Android and am looking for a simple example that demonstrates how the Android App can process a JSON response received from a HTTP request. I need to see what classes are used for Android apps to process a HTTP response. A reference to a good tutorial, or if you're keen, write a very basic method to do the job.
View 1 Replies View RelatedI want to merge a sound file and a video file (remove the sound from the video file and replace it with my own sound) and this should happen on the phone.I have done this through ffmpeg, but I can't do that now.Any help appreciated,
View 1 Replies View RelatedI have converted a few of my Processing sketches into Android apps, but they seem to run really slowly in the emulator and on my device.
Are there any tips on how to increase the speed and performance of my sketch running as an Android app? Are there things or parts of the Processing API I should avoid?
I am trying to send an audio file converted to a byte array with SMS using SMSManager.sendDataMessage.But, I am unable to send it to other phone. Can any suggest how can I do it?
View 1 Replies View RelatedOr extend it in some way to allow for pre/post-processing of all notifications and additional workflow?
View 6 Replies View RelatedIn the Eclipse log I can clearly see a warning pop up (something about buffer overflow) every time I don't read from the AudioRecord buffer fast enough and consequently miss a chunk of audio samples. Is there any way I can detect that notification programatically so I know exactly when I have missed a chunk?
View 2 Replies View Related