async Task <FileData> GetFileData(Android.Net.Uri p_uri)
{
var filePath = IOUtil.GetPath(_context, p_uri);
if (string.IsNullOrEmpty(filePath))
{
filePath = IOUtil.IsMediaStore(p_uri.Scheme) ? p_uri.ToString() : p_uri.Path;
}
var fileName = GetFileName(_context, p_uri);
var fd = new FileData(filePath, fileName, (ulong)new File(filePath).Length());
string ext = fd.Ext;
// 生成文件描述和缩略图
if (FileFilter.UwpImage.Contains(ext))
{
BitmapFactory.Options options = new BitmapFactory.Options();
// 只解析图片大小，不加载内容
options.InJustDecodeBounds = true;
BitmapFactory.DecodeFile(filePath, options);
fd.Desc = $"{options.OutWidth} x {options.OutHeight} ({ext.TrimStart('.')})";
int maxSize = Math.Max(options.OutWidth, options.OutHeight);
if (maxSize > FileData.ThumbSize)
{
// 直接按缩放比例加载
options.InJustDecodeBounds = false;
options.InSampleSize = maxSize / FileData.ThumbSize;
// v29 弃用
//options.InPurgeable = true;
Bitmap bmp = BitmapFactory.DecodeFile(filePath, options);
fd.ThumbPath = System.IO.Path.Combine(Kit.CachePath, Kit.NewGuid + "-t.jpg");
using (var fs = System.IO.File.Create(fd.ThumbPath))
{
await bmp.CompressAsync(Android.Graphics.Bitmap.CompressFormat.Jpeg, 100, fs);
}
bmp.Recycle();
}
}
else if (FileFilter.UwpVideo.Contains(ext))
{
Android.Media.MediaMetadataRetriever media = new Android.Media.MediaMetadataRetriever();
try
{
await media.SetDataSourceAsync(filePath);
string dur = media.ExtractMetadata(Android.Media.MetadataKey.Duration);
string width = media.ExtractMetadata(Android.Media.MetadataKey.VideoWidth);
string height = media.ExtractMetadata(Android.Media.MetadataKey.VideoHeight);
fd.Desc = string.Format("{0:HH:mm:ss} ({1} x {2})", new DateTime(long.Parse(dur) * 10000), width, height);
}
catch { }
finally
{
media.Release();
}
// 帧缩略图
var bmp = await ThumbnailUtils.CreateVideoThumbnailAsync(filePath, ThumbnailKind.MiniKind);
fd.ThumbPath = System.IO.Path.Combine(Kit.CachePath, Kit.NewGuid + "-t.jpg");
using (var fs = System.IO.File.Create(fd.ThumbPath))
{
await bmp.CompressAsync(Android.Graphics.Bitmap.CompressFormat.Jpeg, 100, fs);
}
bmp.Recycle();
}
else if (FileFilter.UwpAudio.Contains(ext))
{
Android.Media.MediaMetadataRetriever media = new Android.Media.MediaMetadataRetriever();
try
{
await media.SetDataSourceAsync(filePath);
string dur = media.ExtractMetadata(Android.Media.MetadataKey.Duration);
fd.Desc = string.Format("{0:mm:ss}", new DateTime(long.Parse(dur) * 10000));
}
catch { }
finally
{
media.Release();
}
}
return(fd);
}
private void createImages(HorizontalScrollView view)
{
MediaMetadataRetriever data = new MediaMetadataRetriever();
data.SetDataSource(filename);
int videoLength = Convert.ToInt32(data.ExtractMetadata(MetadataKey.Duration));
#if DEBUG
Console.WriteLine("Duration = {0}, videoLength = {1}", data.ExtractMetadata(MetadataKey.Duration), videoLength);
#endif
LinearLayout linLay = new LinearLayout(context);
linLay.Orientation = Android.Widget.Orientation.Horizontal;
linLay.LayoutParameters = new ViewGroup.LayoutParams(LinearLayout.LayoutParams.FillParent, LinearLayout.LayoutParams.FillParent);
ShowLightboxDialog(Application.Resources.GetString(Resource.String.videoEditGenerateThumbs));
ImageView imageView = new ImageView(context);
imageView.LayoutParameters = new ViewGroup.LayoutParams((int)ImageHelper.convertDpToPixel(55f, context),
(int)ImageHelper.convertDpToPixel(55f, context));
#if DEBUG
for (int n = 0; n < videoLength; ++n)
{
using (Bitmap bmp = data.GetFrameAtTime((long)n * 1000, (int)Option.ClosestSync))
{
if (bmp != null)
Console.WriteLine("frame {0} contains an image", n);
}
}
#endif
for (int n = 10; n < /*videoLength*/timeUsed * fps; ++n)
{
using (Bitmap bmp = data.GetFrameAtTime((long)n, (int)Option.ClosestSync))
{
if (bmp != null)
{
using (Bitmap smBmp = Bitmap.CreateScaledBitmap(bmp, (int)ImageHelper.convertDpToPixel(55f, context),
(int)ImageHelper.convertDpToPixel(55f, context), true))
{
int m = new int();
m = n;
imageView.Tag = m;
imageView.Click += (object sender, EventArgs e) => frameClicked(sender, e);
imageView.SetImageBitmap(smBmp);
}
} else
imageView.SetBackgroundColor(Color.AliceBlue);
}
RunOnUiThread(() => linLay.AddView(imageView));
}
DismissLightboxDialog();
data.Release();
}
protected override async void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if (resultCode != Result.Ok)
{
if (!string.IsNullOrEmpty(_path) && File.Exists(_path))
{
try
{
File.Delete(_path);
}
catch { }
}
OnCaptured(null);
Finish();
return;
}
try
{
FileData fd = new FileData(_path, System.IO.Path.GetFileName(_path), (ulong)new Java.IO.File(_path).Length());
string ext = fd.Ext;
// 生成文件描述和缩略图
if (ext == ".jpg")
{
BitmapFactory.Options options = new BitmapFactory.Options();
// 只解析图片大小，不加载内容
options.InJustDecodeBounds = true;
BitmapFactory.DecodeFile(_path, options);
fd.Desc = $"{options.OutWidth} x {options.OutHeight} ({ext.TrimStart('.')})";
int maxSize = Math.Max(options.OutWidth, options.OutHeight);
if (maxSize > FileData.ThumbSize)
{
// 直接按缩放比例加载
options.InJustDecodeBounds = false;
options.InSampleSize = maxSize / FileData.ThumbSize;
// v29 弃用
//options.InPurgeable = true;
Bitmap bmp = BitmapFactory.DecodeFile(_path, options);
fd.ThumbPath = System.IO.Path.Combine(Kit.CachePath, Kit.NewGuid + "-t.jpg");
using (var fs = System.IO.File.Create(fd.ThumbPath))
{
await bmp.CompressAsync(Android.Graphics.Bitmap.CompressFormat.Jpeg, 100, fs);
}
bmp.Recycle();
}
}
else if (ext == ".mp4")
{
Android.Media.MediaMetadataRetriever media = new Android.Media.MediaMetadataRetriever();
try
{
await media.SetDataSourceAsync(_path);
string dur = media.ExtractMetadata(Android.Media.MetadataKey.Duration);
string width = media.ExtractMetadata(Android.Media.MetadataKey.VideoWidth);
string height = media.ExtractMetadata(Android.Media.MetadataKey.VideoHeight);
fd.Desc = string.Format("{0:HH:mm:ss} ({1} x {2})", new DateTime(long.Parse(dur) * 10000), width, height);
}
catch { }
finally
{
media.Release();
}
// 帧缩略图
var bmp = await ThumbnailUtils.CreateVideoThumbnailAsync(_path, ThumbnailKind.MiniKind);
fd.ThumbPath = System.IO.Path.Combine(Kit.CachePath, Kit.NewGuid + "-t.jpg");
using (var fs = System.IO.File.Create(fd.ThumbPath))
{
await bmp.CompressAsync(Android.Graphics.Bitmap.CompressFormat.Jpeg, 100, fs);
}
bmp.Recycle();
}
OnCaptured(fd);
}
catch
{
OnCaptured(null);
}
finally
{
Finish();
}
}