private async Task<MediaMetadataRetriever> GetMetadataRetriever(IMediaFile currentFile)
{
MediaMetadataRetriever metaRetriever = new MediaMetadataRetriever();
switch (currentFile.Type)
{
case MediaFileType.AudioUrl:
await metaRetriever.SetDataSourceAsync(currentFile.Url, _requestHeaders);
break;
case MediaFileType.VideoUrl:
break;
case MediaFileType.AudioFile:
Java.IO.File file = new Java.IO.File(currentFile.Url);
Java.IO.FileInputStream inputStream = new Java.IO.FileInputStream(file);
await metaRetriever.SetDataSourceAsync(inputStream.FD);
break;
case MediaFileType.VideoFile:
break;
case MediaFileType.Other:
break;
default:
throw new ArgumentOutOfRangeException();
}
return metaRetriever;
}
/// <summary>
/// Intializes the player.
/// </summary>
public async Task Play ()
{
if (mediaPlayer != null && MediaPlayerState == PlaybackStateCompat.StatePaused) {
//We are simply paused so just start again
mediaPlayer.Start ();
UpdatePlaybackState(PlaybackStateCompat.StatePlaying);
StartNotification ();
//Update the metadata now that we are playing
UpdateMediaMetadataCompat ();
return;
}
if (mediaPlayer == null)
InitializePlayer ();
if(mediaSessionCompat == null)
InitMediaSession ();
if (mediaPlayer.IsPlaying) {
UpdatePlaybackState(PlaybackStateCompat.StatePlaying);
return;
}
try {
MediaMetadataRetriever metaRetriever = new MediaMetadataRetriever ();
await mediaPlayer.SetDataSourceAsync (ApplicationContext, Android.Net.Uri.Parse (audioUrl));
await metaRetriever.SetDataSourceAsync(audioUrl, new Dictionary<string,string>());
var focusResult = audioManager.RequestAudioFocus (this, Stream.Music, AudioFocus.Gain);
if (focusResult != AudioFocusRequest.Granted) {
//could not get audio focus
Console.WriteLine("Could not get audio focus");
}
UpdatePlaybackState(PlaybackStateCompat.StateBuffering);
mediaPlayer.PrepareAsync ();
AquireWifiLock ();
UpdateMediaMetadataCompat (metaRetriever);
StartNotification ();
byte[] imageByteArray = metaRetriever.GetEmbeddedPicture ();
if (imageByteArray == null)
Cover = await BitmapFactory.DecodeResourceAsync(Resources, Resource.Drawable.album_art);
else
Cover = await BitmapFactory.DecodeByteArrayAsync (imageByteArray, 0, imageByteArray.Length);
} catch (Exception ex) {
UpdatePlaybackState(PlaybackStateCompat.StateStopped);
mediaPlayer.Reset();
mediaPlayer.Release();
mediaPlayer = null;
//unable to start playback log error
Console.WriteLine(ex);
}
}
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);
}
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();
}
}