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Spitfire Parade - Crisis
15 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Mis à jour : Février 2012
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Type : Video
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Publier une image simplement
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Type : Video
Autres articles (35)
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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
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Ecrire une actualité
21 juin 2013, parPrésentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
Vous pouvez personnaliser le formulaire de création d’une actualité.
Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...) -
Publier sur MédiaSpip
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Sur d’autres sites (6437)
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FFmpeg encoding in c
25 décembre 2012, par barisatbasI have been working on a project about video summarization on android platfrom. and I am stuck in encoding. I think ;
first I must convert my frame into RGB Frame, then convert that RGB FRame into YUV Frame. Then encode the frame. After this operations, The output video was so weird. I think I missed something. Here is my las optimized code. Maybe someone has an experiement in this subject.Its syntax is changed according to android ndk syntax :
jint Java_com_test_Test_encodeVideo(JNIEnv* env, jobject javaThis)
{
char *flname, *err, *info;
AVCodec *codec;
AVCodecContext *c= NULL;
int i,out_size, size, x, y,z, outbuf_size;
int frameCount=99;
FILE *f;
AVFrame *picture, *yuvFrame;
uint8_t *outbuf, *picture_buf;
PPMImage *img;
const char *destfilename = "/sdcard/new.mp4";
int numBytes;
uint8_t *buffer;
av_register_all();
// must be called before using avcodec lib
avcodec_init();
// register all the codecs
avcodec_register_all();
log_message("Video encoding\n");
// find the H263 video encoder
codec = avcodec_find_encoder(CODEC_ID_H263);
if (!codec) {
sprintf(err, "codec not found\n");
log_message(err);
}
c= avcodec_alloc_context();
picture= avcodec_alloc_frame();
yuvFrame= avcodec_alloc_frame();
// get first ppm context. it is because I need width and height values.
img = getPPM("/sdcard/frame1.ppm");
c->bit_rate = 400000;
// resolution must be a multiple of two
c->width = img->x;
c->height = img->y;
free(img);
// frames per second
c->time_base= (AVRational){1,25};
c->gop_size = 10; // emit one intra frame every ten frames
//c->max_b_frames=1;
c->pix_fmt = PIX_FMT_YUV420P;
// open it
if (avcodec_open(c, codec) < 0){
log_message("codec couldn't open");
return -1;
}
//destfilename = (*env)->GetStringUTFChars(env, dst, 0);
f = fopen(destfilename, "wb");
log_message(destfilename);
if (!f) {
sprintf(err, "could not open %s", destfilename);
log_message(err);
}
log_message("after destination file opening");
// alloc image and output buffer
outbuf_size = 100000;
outbuf = malloc(outbuf_size);
size = c->width * c->height;
picture_buf = malloc(size * 3); // size for RGB
picture->data[0] = picture_buf;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size / 4;
picture->linesize[0] = c->width;
picture->linesize[1] = c->width / 2;
picture->linesize[2] = c->width / 2;
numBytes=avpicture_get_size(PIX_FMT_YUV420P, c->width,
c->height);
buffer=malloc(numBytes);
// Assign appropriate parts of buffer to image planes in FrameYUV
avpicture_fill((AVPicture *)yuvFrame, buffer, PIX_FMT_YUV420P,
c->width, c->height);
// encode the video
log_message("before for loop");
for(z=1;zsdcard/frame%d.ppm",z);
// read the ppm file
img = getPPM(flname);
picture->data[0] = img->data;
// convert the rgb frame into yuv frame
rgb2yuv(picture,yuvFrame,c);
log_message("translation completed.");
// encode the image
out_size = avcodec_encode_video(c, outbuf, outbuf_size, yuvFrame);
sprintf(info,"encoding frame %3d (size=%5d)\n", z, out_size);
log_message(info);
fwrite(outbuf, 1, out_size, f);
free(img);
}
// get the delayed frames
for(; out_size; i++) {
//fflush(stdout);
out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
sprintf(info,"write frame %3d (size=%5d)\n", i, out_size);
log_message(info);
fwrite(outbuf, 1, out_size, f);
}
// add sequence end code to have a real mpeg file
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, f);
fclose(f);
free(picture_buf);
free(outbuf);
avcodec_close(c);
av_free(c);
av_free(picture);
av_free(yuvFrame);
}
int rgb2yuv(AVFrame *frameRGB, AVFrame *frameYUV, AVCodecContext *c)
{
char *err;
static struct SwsContext *img_convert_ctx;
log_message("conversion starts");
// Convert the image into YUV format from RGB format
if(img_convert_ctx == NULL) {
int w = c->width;
int h = c->height;
img_convert_ctx = sws_getContext(w, h, PIX_FMT_RGB24,w, h, c->pix_fmt, SWS_BICUBIC,NULL, NULL, NULL);
if(img_convert_ctx == NULL) {
sprintf(err, "Cannot initialize the conversion context!\n");
log_message(err);
return -1;
}
}
int ret = sws_scale(img_convert_ctx,frameRGB->data, frameRGB->linesize , 0,c->height,frameYUV->data, frameYUV->linesize );
return;
} -
Revision e7bddba149 : new version of speed 1 This version of speed 1 only disables modes at higher re
23 avril 2013, par Jim BankoskiChanged Paths : Modify /vp9/encoder/vp9_block.h Modify /vp9/encoder/vp9_rdopt.c new version of speed 1 This version of speed 1 only disables modes at higher resolution that had distortions >2x the best mode we found... The hope is that this could be a replacement for speed 0 ... Change-Id : (...)
-
Getting Error during executin native android code
3 avril 2013, par dilipkaklotarError on my console
bash : cannot set terminal process group (-1) : Inappropriate ioctl for device
bash : no job control in this shell
Your group is currently "mkpasswd". This indicates that your
gid is not in /etc/group and your uid is not in /etc/passwd.The /etc/passwd (and possibly /etc/group) files should be rebuilt.
See the man pages for mkpasswd and mkgroup then, for example, runmkpasswd -l [-d] > /etc/passwd
mkgroup -l [-d] > /etc/groupNote that the -d switch is necessary for domain users.
]0 ; -
[32mDILIP@DILIP-PC -[33m -[0m
$public class VideoBrowser extends ListActivity implements ListView.OnScrollListener {
/*this part communicates with native code through jni (java native interface)*/
//load the native library
static {
System.loadLibrary("ffmpeg");
System.loadLibrary("ffmpeg-test-jni");
}
//declare the jni functions
private static native void naInit(String _videoFileName);
private static native int[] naGetVideoResolution();
private static native String naGetVideoCodecName();
private static native String naGetVideoFormatName();
private static native void naClose();
private void showVideoInfo(final File _file) {
String videoFilename = _file.getAbsolutePath();
naInit(videoFilename);
int[] prVideoRes = naGetVideoResolution();
String prVideoCodecName = naGetVideoCodecName();
String prVideoFormatName = naGetVideoFormatName();
naClose();
String displayText = "Video: " + videoFilename + "\n";
displayText += "Video Resolution: " + prVideoRes[0] + "x" + prVideoRes[1] + "\n";
displayText += "Video Codec: " + prVideoCodecName + "\n";
displayText += "Video Format: " + prVideoFormatName + "\n";
text_titlebar_text.setText(displayText);
}
/*the rest of the file deals with UI and other stuff*/
private Context mContext;
public static VideoBrowser self;
/**
* activity life cycle: this part of the source code deals with activity life cycle
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
mContext = this.getApplicationContext();
self = this;
initUI();
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindDisplayEntries();
}
public void unbindDisplayEntries() {
if (displayEntries!=null) {
int l_count = displayEntries.size();
for (int i = 0; i < l_count; ++i) {
IconifiedTextSelected l_its = displayEntries.get(i);
if (l_its != null) {
Drawable l_dr = l_its.getIcon();
if (l_dr != null) {
l_dr.setCallback(null);
l_dr = null;
}
}
}
}
if (l_displayEntries!=null) {
int l_count = l_displayEntries.size();
for (int i = 0; i < l_count; ++i) {
IconifiedTextSelected l_its = l_displayEntries.get(i);
if (l_its != null) {
Drawable l_dr = l_its.getIcon();
if (l_dr != null) {
l_dr.setCallback(null);
l_dr = null;
}
}
}
}
}
/**
* Data: this part of the code deals with data processing
*/
public List<iconifiedtextselected> displayEntries = new ArrayList<iconifiedtextselected>();
public static List<iconifiedtextselected> l_displayEntries = new ArrayList<iconifiedtextselected>();;
/**load images
* this part of code deals with loading of images
*/
private File currentDirectory;
public int media_browser_load_option = 2;
private static int last_media_browser_load_option = 2;
private static int number_of_icons = 0;
private static final String upOneLevel = "..";
LoadVideoTask loadTask;
private void loadVideosFromDirectory(String _dir) {
try {
loadTask = new LoadVideoTask();
loadTask.execute(_dir);
} catch (Exception e) {
Toast.makeText(this, "Load media fail!", Toast.LENGTH_SHORT).show();
}
}
private void getVideosFromDirectoryNonRecurAddParent(File _dir) {
//add the upper one level data
if (_dir.getParent()!=null) {
this.displayEntries.add(new IconifiedTextSelected(
upOneLevel,
getResources().getDrawable(R.drawable.folderback),
false, false, 0));
}
}
private void getVideosFromDirectoryNonRecur(File _dir) {
Drawable folderIcon = this.getResources().getDrawable(R.drawable.normalfolder);
//add the
if (!_dir.isDirectory()) {
return;
}
File[] files = _dir.listFiles();
if (files == null) {
return;
}
Drawable videoIcon = null;
int l_iconType = 0;
for (File currentFile : files) {
if (currentFile.isDirectory()) {
//if it's a directory
this.displayEntries.add(new IconifiedTextSelected(
currentFile.getPath(),
folderIcon, false, false, 0));
} else {
String l_filename = currentFile.getName();
if (checkEndsWithInStringArray(l_filename,
getResources().getStringArray(R.array.fileEndingVideo))) {
if (number_of_icons < 10) {
videoIcon = null;
++number_of_icons;
l_iconType = 22;
} else {
videoIcon = null;
l_iconType = 2;
}
this.displayEntries.add(new IconifiedTextSelected(
currentFile.getPath(),
videoIcon, false, false, l_iconType));
}
}
}
}
private void getVideosFromDirectoryRecur(File _dir) {
Drawable videoIcon = null;
File[] files = _dir.listFiles();
int l_iconType = 2;
if (files == null) {
return;
}
for (File currentFile : files) {
if (currentFile.isDirectory()) {
getVideosFromDirectoryRecur(currentFile);
continue;
} else {
String l_filename = currentFile.getName();
//if it's an image file
if (checkEndsWithInStringArray(l_filename,
getResources().getStringArray(R.array.fileEndingVideo))) {
if (number_of_icons < 10) {
videoIcon = null;
++number_of_icons;
l_iconType = 22;
} else {
videoIcon = null;
l_iconType = 2;
}
this.displayEntries.add(new IconifiedTextSelected(
currentFile.getPath(),
videoIcon, false, false, l_iconType));
}
}
}
}
private void getVideosFromGallery() {
Drawable videoIcon = null;
Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
String[] projection = {MediaStore.Video.Media.DATA};
Cursor l_cursor = this.managedQuery(uri, projection, null, null, null);
int videoNameColumnIndex;
String videoFilename;
File videoFile;
int l_iconType = 2;
if (l_cursor!=null) {
if (l_cursor.moveToFirst()) {
do {
videoNameColumnIndex = l_cursor.getColumnIndexOrThrow(
MediaStore.Images.Media.DATA);
videoFilename = l_cursor.getString(videoNameColumnIndex);
videoFile = new File(videoFilename);
if (!videoFile.exists()) {
continue;
}
if (number_of_icons <= 10) {
videoIcon = null;
++number_of_icons;
l_iconType = 22;
} else {
videoIcon = null;
l_iconType = 2;
}
this.displayEntries.add(new IconifiedTextSelected(
videoFile.getAbsolutePath(),
videoIcon, false, false, l_iconType));
} while (l_cursor.moveToNext());
}
}
if (l_cursor!=null) {
l_cursor.close();
}
}
private boolean checkEndsWithInStringArray(String checkItsEnd,
String[] fileEndings){
for(String aEnd : fileEndings){
if(checkItsEnd.endsWith(aEnd))
return true;
}
return false;
}
private class LoadVideoTask extends AsyncTask {
@Override
protected void onPreExecute() {
System.gc();
displayEntries.clear();
showDialog(DIALOG_LOAD_MEDIA);
}
@Override
protected Void doInBackground(String... params) {
File l_root = new File(params[0]);
if (l_root.isDirectory()) {
number_of_icons = 0;
currentDirectory = l_root;
if (media_browser_load_option == 0) {
//list all videos in the root directory without going into sub folder
getVideosFromDirectoryNonRecurAddParent(l_root);
getVideosFromDirectoryNonRecur(l_root);
} else if (media_browser_load_option == 1) {
//list all videos in the root folder recursively
getVideosFromDirectoryRecur(l_root);
} else if (media_browser_load_option == 2) {
//list all videos in the gallery
getVideosFromGallery();
}
}
return null;
}
@Override
protected void onPostExecute(Void n) {
refreshUI();
dismissDialog(DIALOG_LOAD_MEDIA);
}
}
/**
* UI: this part of the source code deals with UI
*/
//bottom menu
private int currentFocusedBtn = 1;
private Button btn_bottommenu1;
private Button btn_bottommenu2;
private Button btn_bottommenu3;
//private Button btn_bottommenu4;
//title bar
private TextView text_titlebar_text;
private void initUI() {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.setContentView(R.layout.video_browser);
//title bar
text_titlebar_text = (TextView) findViewById(R.id.titlebar_text);
text_titlebar_text.setText("Click a video to display info");
//bottom menu
int l_btnWidth = this.getWindowManager().getDefaultDisplay().getWidth()/4;
btn_bottommenu1 = (Button) findViewById(R.id.video_browser_btn1);
//btn_bottommenu1 = (ActionMenuButton) findViewById(R.id.main_topsecretimport_btn1);
btn_bottommenu1.setWidth(l_btnWidth);
btn_bottommenu1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
btn_bottommenu1.setEnabled(false);
btn_bottommenu2.setEnabled(true);
btn_bottommenu3.setEnabled(true);
currentFocusedBtn = 1;
last_list_view_pos = 0;
media_browser_load_option = 2;
last_media_browser_load_option = media_browser_load_option;
loadVideosFromDirectory("/sdcard/");
}
});
btn_bottommenu2 = (Button) findViewById(R.id.video_browser_btn2);
btn_bottommenu2.setWidth(l_btnWidth);
btn_bottommenu2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
btn_bottommenu1.setEnabled(true);
btn_bottommenu2.setEnabled(false);
btn_bottommenu3.setEnabled(true);
currentFocusedBtn = 2;
last_list_view_pos = 0;
media_browser_load_option = 0;
last_media_browser_load_option = media_browser_load_option;
loadVideosFromDirectory("/sdcard/");
}
});
btn_bottommenu3 = (Button) findViewById(R.id.video_browser_btn3);
btn_bottommenu3.setWidth(l_btnWidth);
btn_bottommenu3.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
btn_bottommenu1.setEnabled(true);
btn_bottommenu2.setEnabled(true);
btn_bottommenu3.setEnabled(false);
currentFocusedBtn = 3;
last_list_view_pos = 0;
media_browser_load_option = 1;
last_media_browser_load_option = media_browser_load_option;
loadVideosFromDirectory("/sdcard/");
}
});
media_browser_load_option = last_media_browser_load_option;
if (media_browser_load_option==2) {
btn_bottommenu1.setEnabled(false);
} else if (media_browser_load_option==0) {
btn_bottommenu2.setEnabled(false);
} else if (media_browser_load_option==1){
btn_bottommenu3.setEnabled(false);
}
loadVideosFromDirectory("/sdcard/");
}
//refresh the UI when the directoryEntries changes
private static int last_list_view_pos = 0;
public void refreshUI() {
int l_btnWidth = this.getWindowManager().getDefaultDisplay().getWidth()/4;
btn_bottommenu1.setWidth(l_btnWidth);
btn_bottommenu2.setWidth(l_btnWidth);
btn_bottommenu3.setWidth(l_btnWidth);
//btn_bottommenu4.setWidth(l_btnWidth);
SlowAdapter itla = new SlowAdapter(this);
itla.setListItems(this.displayEntries);
this.setListAdapter(itla);
getListView().setOnScrollListener(this);
int l_size = this.displayEntries.size();
if (l_size > 50) {
getListView().setFastScrollEnabled(true);
} else {
getListView().setFastScrollEnabled(false);
}
if (l_size > 0) {
if (last_list_view_pos < l_size) {
getListView().setSelection(last_list_view_pos);
} else {
getListView().setSelection(l_size-1);
}
}
registerForContextMenu(getListView());
}
@Override
public void onConfigurationChanged (Configuration newConfig) {
super.onConfigurationChanged(newConfig);
refreshUI();
}
static final int DIALOG_LOAD_MEDIA = 1;
static final int DIALOG_HELP = 2;
@Override
protected Dialog onCreateDialog(int id) {
switch(id) {
case DIALOG_LOAD_MEDIA:
ProgressDialog dialog = new ProgressDialog(this);
dialog.setTitle("Load Files");
dialog.setMessage("Please wait while loading...");
dialog.setIndeterminate(true);
dialog.setCancelable(true);
return dialog;
default:
return null;
}
}
/**
* scroll events methods: this part of the source code contain the control source code
* for handling scroll events
*/
private boolean mBusy = false;
private void disableButtons() {
btn_bottommenu1.setEnabled(false);
btn_bottommenu2.setEnabled(false);
btn_bottommenu3.setEnabled(false);
}
private void enableButtons() {
if (currentFocusedBtn!=1) {
btn_bottommenu1.setEnabled(true);
}
if (currentFocusedBtn!=2) {
btn_bottommenu2.setEnabled(true);
}
if (currentFocusedBtn!=3) {
btn_bottommenu3.setEnabled(true);
}
}
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
last_list_view_pos = view.getFirstVisiblePosition();
}
//private boolean mSaveMemory = false;
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
enableButtons();
mBusy = false;
int first = view.getFirstVisiblePosition();
int count = view.getChildCount();
int l_releaseTarget;
for (int i=0; i/if outofmemory, we try to clean up 10 view image resources,
//and try again
for (int j = 0; j < 10; ++j) {
l_releaseTarget = first - count - j;
if (l_releaseTarget > 0) {
IconifiedTextSelected l_its = displayEntries.get(l_releaseTarget);
IconifiedTextSelectedView l_itsv = (IconifiedTextSelectedView)
this.getListView().getChildAt(l_releaseTarget);
if (l_itsv!=null) {
l_itsv.setIcon(null);
}
if (l_its != null) {
Drawable l_dr = l_its.getIcon();
l_its.setIcon(null);
if (l_dr != null) {
l_dr.setCallback(null);
l_dr = null;
}
}
}
}
System.gc();
//after clean up, we try again
if (l_type == 1) {
l_icon = null;
} else if (l_type == 2) {
l_icon = null;
}
}
this.displayEntries.get(first+i).setIcon(l_icon);
if (l_icon != null) {
t.setIcon(l_icon);
t.setTag(null);
}
}
}
//System.gc();
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
disableButtons();
mBusy = true;
break;
case OnScrollListener.SCROLL_STATE_FLING:
disableButtons();
mBusy = true;
break;
}
}
/**
* List item click action
*/
private File currentFile;
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
last_list_view_pos = position;
String selectedFileOrDirName = this.displayEntries.get((int)id).getText();
if (selectedFileOrDirName.equals(upOneLevel)) {
if (this.currentDirectory.getParent()!=null) {
last_list_view_pos = 0;
browseTo(this.currentDirectory.getParentFile());
}
} else {
File l_clickedFile = new File(this.displayEntries.get((int)id).getText());
if (l_clickedFile != null) {
if (l_clickedFile.isDirectory()) {
last_list_view_pos = 0;
browseTo(l_clickedFile);
} else {
showVideoInfo(l_clickedFile);
}
}
}
}
private void browseTo(final File _dir) {
if (_dir.isDirectory()) {
this.currentDirectory = _dir;
loadVideosFromDirectory(_dir.getAbsolutePath());
}
}
/**
* Slow adapter: this part of the code implements the list adapter
* Will not bind views while the list is scrolling
*/
private class SlowAdapter extends BaseAdapter {
/** Remember our context so we can use it when constructing views. */
private Context mContext;
private List<iconifiedtextselected> mItems = new ArrayList<iconifiedtextselected>();
public SlowAdapter(Context context) {
mContext = context;
}
public void setListItems(List<iconifiedtextselected> lit)
{ mItems = lit; }
/** @return The number of items in the */
public int getCount() { return mItems.size(); }
public Object getItem(int position)
{ return mItems.get(position); }
/** Use the array index as a unique id. */
public long getItemId(int position) {
return position;
}
/** @param convertView The old view to overwrite, if one is passed
* @returns a IconifiedTextSelectedView that holds wraps around an IconifiedText */
public View getView(int position, View convertView, ViewGroup parent) {
IconifiedTextSelectedView btv;
if (convertView == null) {
btv = new IconifiedTextSelectedView(mContext, mItems.get(position));
} else { // Reuse/Overwrite the View passed
// We are assuming(!) that it is castable!
btv = (IconifiedTextSelectedView) convertView;
btv.setText(mItems.get(position).getText());
}
if (position==0) {
if (VideoBrowser.self.media_browser_load_option==0) {
btv.setIcon(R.drawable.folderback);
} else if (mItems.get(0).getIcon()!=null) {
btv.setIcon(mItems.get(position).getIcon());
} else {
btv.setIcon(R.drawable.video);
}
}
//in busy mode
else if (mBusy){
//if icon is NULL: the icon is not loaded yet; load default icon
if (mItems.get(position).getIcon()==null) {
btv.setIcon(R.drawable.video);
//mark this view, indicates the icon is not loaded
btv.setTag(this);
} else {
//if icon is not null, just display the icon
btv.setIcon(mItems.get(position).getIcon());
//mark this view, indicates the icon is loaded
btv.setTag(null);
}
} else {
//if not busy
Drawable d = mItems.get(position).getIcon();
if (d == null) {
//icon is not loaded, load now
btv.setIcon(R.drawable.video);
btv.setTag(this);
} else {
btv.setIcon(mItems.get(position).getIcon());
btv.setTag(null);
}
}
return btv;
}
}
</iconifiedtextselected></iconifiedtextselected></iconifiedtextselected></iconifiedtextselected></iconifiedtextselected></iconifiedtextselected></iconifiedtextselected>}
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