image processing - android camera2 process each frame and display its preview -

-

i use https://github.com/googlesamples/android-camera2basic, try modify in way access each frame before drawn on surfaceview. understood, should add additional surface (imagereader.getsurface()), , read frame in callback:

private final imagereader.onimageavailablelistener monimageavailablelistener             = new imagereader.onimageavailablelistener() {          @override         public void onimageavailable(imagereader reader) {             log.d("img", "onimageavailable");             mbackgroundhandler.post(new imagesaver(reader.acquirenextimage(), mfile));         }      };

the problem callback gets called when image capture user , not on eacg frame sent preview screen camera.

here tried add:

private void createcamerapreviewsession() {         try {             surfacetexture texture = mtextureview.getsurfacetexture();             assert texture != null;              // configure size of default buffer size of camera preview want.             texture.setdefaultbuffersize(mpreviewsize.getwidth(), mpreviewsize.getheight());              // output surface need start preview.             surface surface = new surface(texture);              // set capturerequest.builder output surface.             mpreviewrequestbuilder                     = mcameradevice.createcapturerequest(cameradevice.template_preview);             mpreviewrequestbuilder.addtarget(surface);              // here, create cameracapturesession camera preview.             mcameradevice.createcapturesession(arrays.aslist(surface, mimagereader.getsurface()),                     new cameracapturesession.statecallback() {                          @override                         public void onconfigured(cameracapturesession cameracapturesession) {                             // camera closed                             if (null == mcameradevice) {                                 return;                             }                              // when session ready, start displaying preview.                             mcapturesession = cameracapturesession;                             try {                                 // auto focus should continuous camera preview.                                 mpreviewrequestbuilder.set(capturerequest.control_af_mode,                                         capturerequest.control_af_mode_continuous_picture);                                 // flash automatically enabled when necessary.                                 mpreviewrequestbuilder.set(capturerequest.control_ae_mode,                                         capturerequest.control_ae_mode_on_auto_flash);                                  // finally, start displaying camera preview.                                 mpreviewrequest = mpreviewrequestbuilder.build();                                 mcapturesession.setrepeatingrequest(mpreviewrequest,                                         mcapturecallback, mbackgroundhandler);                                 //mpreviewrequestbuilder.addtarget(mimagereader.getsurface());                             } catch (cameraaccessexception e) {                                 e.printstacktrace();                             }                         }                          @override                         public void onconfigurefailed(cameracapturesession cameracapturesession) {                             showtoast("failed");                         }                     }, null             );              /**todo added capturing aeach frame*/             // capturerequest.builder use take picture.             final capturerequest.builder capturebuilder =                     mcameradevice.createcapturerequest(cameradevice.template_still_capture);             capturebuilder.addtarget(mimagereader.getsurface());              // use same ae , af modes preview.             capturebuilder.set(capturerequest.control_af_mode,                     capturerequest.control_af_mode_continuous_picture);             capturebuilder.set(capturerequest.control_ae_mode,                     capturerequest.control_ae_mode_on_auto_flash);              /**end added capture each frame*/           } catch (cameraaccessexception e) {             e.printstacktrace();         }     }

instead of creating new instance of capturerequest.builder, add imagereader's surface mpreviewrequestbuilder's output target.


Comments

Post a Comment

Popular posts from this blog

c# - Better 64-bit byte array hash -

-
i need hash algorithm produces 64-bit hash code ( long ) fewer collisions string.gethashcode() , fast (no expensive calls cryptographic functions). here's implementation of fnv still shows 3% of collisions after testing 2 million random strings. need number way lower. void main() { const string chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz!#@$%^&*()_+}{\":?><,./;'[]0123456789\\"; const int n = 2000000; var random = new random(); var hashes = new hashset<long>(); int collisions = 0; for(int = 0; < n; i++) { var len = random.next(chars.length); var str = new char[len]; (int j = 0; j < len; j++) { str[j] = chars[random.next(chars.length)]; } var s = new string(str); if(!hashes.add(get64bithash( s ))) collisions++; } console.writeline("collision percentage after " + n + " random strings: " + ((doubl
Read more

webrtc - Which ICE candidate am I using and why? -

-
[questions in bold below] i have setup kurento media server 5.1.3 in datacenter behind firewall running os ubuntu 14.04. has 2 network cards: 222.222.222.222 (eth0 - private ip) 111.111.111.111 (eth1 - public ip) attached below sdp (setremotedescription) when browser connected kurento media server type: answer, sdp: v=0 o=- 5487318114793304426 0 in ip4 0.0.0.0 s=kurento media server c=in ip4 0.0.0.0 t=0 0 a=group:bundle audio video m=audio 59068 rtp/savpf 111 0 c=in ip4 111.111.111.111 a=rtpmap:111 opus/48000/2 a=rtpmap:0 pcmu/8000 a=sendrecv a=rtcp:59068 in ip4 111.111.111.111 a=rtcp-mux a=ssrc:669011897 cname:user39019747@host-6e83e4c2 a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time a=mid:audio b=as:20 a=ice-ufrag:ymdk a=ice-pwd:lylifk5ueqzpwm91ddj37e a=fingerprint:sha-256 ff:0f:81:8c:41:4e:b4:b6:c6:d8:36:f3:d6:5f:09:fd:5f:af:13:b3:9d:fc:12:66:ac:f3:56:d6:5b:0a:73:5d a=candidate:1 1 udp 2013266431 111.111.111.111 55239 typ host a=candidate:2 1 udp
Read more

php - Zend Framework / Skeleton-Application / Composer install issue -

-
i trying create zend framework application using skeleton in netbeans. when run composer install, following error message: "c:\php\php.exe" "c:\composer\composer.phar" "--ansi" "--no-interaction" "update" "--dev" using deprecated option "dev". dev packages installed default now. loading composer repositories package information updating dependencies (including require-dev) requirements not resolved installable set of packages. problem 1 - package requires php >=5.5 php version (5.4.42) not satisfy requirement. problem 2 - installation request zendframework/zendframework 2.5.1 -> satisfiable zendframework/zendframework[2.5.1]. - zendframework/zendframework 2.5.1 requires php >=5.5 -> php version (5.4.42) not satisfy requirement. done. apparently, zend framework only needs php 5.3+ contradicts above. need use php 5.4. my composer.json following: { "name": "
Read more