/// <summary>
/// starts a task to decode the video
/// </summary>
/// <returns></returns>
public Task RunAsync()
{
//var DecodeThread = new Task(() => Run(), TaskCreationOptions.LongRunning);
//DecodeThread.Start();
//return DecodeThread;
//so we can restart the player.
decoder = MediaCodec.CreateDecoderByType("video/avc");
info = new Android.Media.MediaCodec.BufferInfo();
running = true;
return (DecodeThread = Task.Run(() => Run()));
}
public void OnCryptoError(MediaCodec.CryptoException e)
{
if (_internalErrorListener != null)
{
_internalErrorListener.OnCryptoError(e);
}
}
public void OnCryptoError(MediaCodec.CryptoException e)
{
PrintInternalError("cryptoError", e);
}
override public async void Run()
{
//Android.Media.MediaExtractor extractor;
Android.Media.MediaCodec decoder = null;
using (var extractor = new Android.Media.MediaExtractor())
//using (Android.Media.MediaCodec decoder = null)
{
//extractor = new Android.Media.MediaExtractor();
try
{
await extractor.SetDataSourceAsync(SAMPLE).ConfigureAwait(false);
}
catch (Exception ex)
{
var s = ex.ToString();
return;
}
for (int i = 0; i < extractor.TrackCount; i++)
{
var format = extractor.GetTrackFormat(i);
Log.Debug("Format info: ", format.ToString());
String mime = format.GetString(Android.Media.MediaFormat.KeyMime);
if (mime.StartsWith("video/"))
{
Log.Debug("Format mime: ", mime);
//Log.Debug("Format " + MediaFormat.KeyMaxInputSize + ": ",
// format.GetInteger(MediaFormat.KeyMaxInputSize).ToString());
Log.Debug("Format " + MediaFormat.KeyWidth + ": ",
format.GetInteger(MediaFormat.KeyWidth).ToString());
Log.Debug("Format " + MediaFormat.KeyHeight + ": ",
format.GetInteger(MediaFormat.KeyHeight).ToString());
PrintFormatInfo(format);
extractor.SelectTrack(i);
//decoder = Android.Media.MediaCodec.CreateDecoderByType(mime);
//this is where the Xamarin Android VM dies.
//decoder.Configure(format, surface, null, 0);
break;
}
}
//if (decoder == null)
//{
// Android.Util.Log.Error("DecodeActivity", "Can't find video info!");
// return;//can't continue...
//}
var f = new Java.IO.File(dir + "decode.out");
if (f.Exists())
{
f.Delete();
}
f.CreateNewFile();
var f2 = new Java.IO.File(dir + "decode2.out");
if (f2.Exists())
{
f2.Delete();
}
f2.CreateNewFile();
//open the file for our custom extractor
var inInfo = new System.IO.FileInfo(SAMPLE);
if (!inInfo.Exists)
{
Log.Error("input file not found!", inInfo.FullName);
return;
}
using (var inStream = inInfo.OpenRead())
using (var fs2 = new Java.IO.FileOutputStream(f2)) //get an output stream
using (var fs = new Java.IO.FileOutputStream(f)) //get an output stream
{
//var inputBuffers = decoder.GetInputBuffers();
//var outputBuffers = decoder.GetOutputBuffers();
var info = new Android.Media.MediaCodec.BufferInfo();
bool started = false, isEOS = false;
var sw = new System.Diagnostics.Stopwatch();
long startMs = sw.ElapsedMilliseconds;
sw.Start();
byte[] peekBuf = new byte[188];
//for dumping the sample into instead of the decoder.
var buffer = Java.Nio.ByteBuffer.Allocate(165000);// decoder.GetInputBuffer(inIndex);
var buffEx = new BufferExtractor();
var tmpB = new byte[20000];
while (!interrupted)
{
//sw.Restart();
if (!isEOS)
{
int inIndex = 1;// decoder.DequeueInputBuffer(10000);
if (inIndex >= 0)
{
buffer.Position(0);//reset the buffer
if (buffer.Position() != 0)
{
Log.Debug("inBuff.Position: ", buffer.Position().ToString());
}
Log.Debug("inBuff: ", buffer.ToString());
int sampleSize = extractor.ReadSampleData(buffer, 0);
if (sampleSize < 0)
{
// We shouldn't stop the playback at this point, just pass the EOS
// flag to decoder, we will get it again from the
// dequeueOutputBuffer
Log.Debug("DecodeActivity", MediaCodecBufferFlags.EndOfStream.ToString());
//decoder.QueueInputBuffer(inIndex, 0, 0, 0, MediaCodecBufferFlags.EndOfStream);
isEOS = true;
}
else
{
if (peekBuf.Length < sampleSize)
{
peekBuf = new byte[sampleSize];
}
peekBuf.Initialize(); //clear old data.
buffer.Get(peekBuf);
buffer.Position(0); //reset for the decoder
for (int i = 4; i < peekBuf.Length; ++i)
{
if (peekBuf[i] == 0x01 &&
peekBuf[i - 1] == 0x00 &&
peekBuf[i - 2] == 0x00 &&
peekBuf[i - 3] == 0x00)
{
Log.Debug("Found h264 start code: ",
string.Format("i={0} of {1}", i, sampleSize));
}
}
Log.Debug("ExtractorActivity, sampleSize: ", sampleSize.ToString());
if (!started)//get your parser synced with theirs
{
do
{
peekBuf = new byte[188];
await inStream.ReadAsync(peekBuf, 0, peekBuf.Length)
.ConfigureAwait(false);
buffEx.AddRaw(peekBuf);
if (buffEx.outBuffers.Count > 0 &&
buffEx.outBuffers.Peek().GetPayload().Length != sampleSize)
{
buffEx.outBuffers.Dequeue();//throw this one away
}
} while (buffEx.outBuffers.Count == 0);
started = true;
}
else
{
do
{
peekBuf = new byte[188];
await inStream.ReadAsync(peekBuf, 0, peekBuf.Length)
.ConfigureAwait(false);
buffEx.AddRaw(peekBuf);
} while (buffEx.outBuffers.Count == 0);
started = true;
}
//write out the vid data.
buffer.Limit(sampleSize);
buffer.Position(0);
//if (tmpB.Length < sampleSize)
tmpB = new byte[sampleSize];
buffer.Get(tmpB);
fs.Write(tmpB);
buffer.Limit(buffer.Capacity());//reset the limit for next sample
buffer.Position(0);
fs2.Write(buffEx.outBuffers.Dequeue().GetPayload());
if (!inStream.CanRead)
{
isEOS = true;//end of stream.
}
//decoder.QueueInputBuffer(inIndex, 0, sampleSize, extractor.SampleTime, 0);
await extractor.AdvanceAsync().ConfigureAwait(false);
//extractor.AdvanceAsync();
}
}
}
// All decoded frames have been rendered, we can stop playing now
if ((info.Flags & MediaCodecBufferFlags.EndOfStream) != 0)
{
Android.Util.Log.Debug("DecodeActivity",
MediaCodecBufferFlags.EndOfStream.ToString());
break;
}
}
//decoder.Stop();
}
}
}
