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();
}
}
}
protected override async void Run()
{
try
{
running = true;
var finfo = new System.IO.FileInfo(FilePlayer.SAMPLE);//FilePlayer.dir + "decode.out");
var fs = finfo.OpenRead();
int bytes, count, inIndex =0;
int buffSize = TsPacket.PacketLength*4;//simulate multiple TS packets grouped into a single UDP packet
var buff = new byte[buffSize];
var ts = new MpegTS.TsPacket(buff);
buffEx = new BufferExtractor();
//buffEx.SampleReady += BuffEx_SampleReady;
bool eof = false;
using(info)
using(decoder)
using (fs)
{
count = 0;
Log.Debug(TAG, "looking for format info");
////look for the format info.
//do
//{
// bytes = await fs.ReadAsync(buff, 0, buff.Length).ConfigureAwait(false);
// Log.Debug(TAG, "PID: " + string.Format("{0}", ts.PID));
//} while (BitConverter.ToInt32(buff, formatStartI) != formatStartVal);
//Log.Debug(TAG, "found format info");
//var tmpB = new byte[23 + 8];
//System.Buffer.BlockCopy(buff, formatStartI - 4, tmpB, 0, tmpB.Length);
InitializeDecoder();
fs.Position = 0;//reset
sw.Restart();
//bool started = false;
do
{
++count;
try
{
while (fs.CanRead && buffEx.SampleCount == 0)
{
if (fs.Length - fs.Position < buffSize)
{
eof = true;
break;//we're @ EOF
}
//we need a new buffer every loop!
buff = new byte[buffSize];
bytes = await fs.ReadAsync(buff, 0, buff.Length)
.ConfigureAwait(false);
//push the raw data to our custom extractor
if (!buffEx.AddRaw(buff))
{
Log.Debug("ExtractorActivity, ", " ----------bad TS packet!");
//find next sync byte and try again
fs.Position -= buff.Length
- buff.ToList().IndexOf(MpegTS.TsPacket.SyncByte);
}
}
if (!fs.CanRead || eof)
break;
}
catch (Exception ex)
{
Log.Error("ExtractorActivity error: ", ex.ToString());
}
//get the raw video stream, stripped of Mpeg TS headers
var sample = buffEx.DequeueNextSample();
Log.Debug("ExtractorActivity, sampleSize: ", sample.Length.ToString());
//var outputBuffers = decoder.GetOutputBuffers();
//get a input buffer index from the decoder for input
inIndex = decoder.DequeueInputBuffer(10000);
if (inIndex >= 0)
{
//get the re-assembled video data from the extractor
using (var b = Java.Nio.ByteBuffer.Wrap(sample.Buffer))
{
var inB = inputBuffers[inIndex];
//*************
//THE BUFFER *******MUST********* be CLEARED before each write,
//else when the buffers start getting recycled, the decoder will
//read past the end of the current data into old data!
//This may cause tearing of the picture, or even a complete
//crash of the app from internal errors in native decoder code!!!!!
inB.Clear();
inB.Put(b);//put data into the decoder's native buffer
//tell the decoder about the new data in the buffer
decoder.QueueInputBuffer(inIndex, 0, b.Limit(), 0, MediaCodecBufferFlags.None);
}// b.Dispose();//clean up
}
//else
// continue;//we don't have a full video frame, look for more.
//check decoder output/state
int outIndex = decoder.DequeueOutputBuffer(info, 10000);
switch ((Android.Media.MediaCodecInfoState)outIndex)
{
case MediaCodecInfoState.OutputBuffersChanged:
Android.Util.Log.Debug("DecodeActivity",
MediaCodecInfoState.OutputBuffersChanged.ToString());
outputBuffers = decoder.GetOutputBuffers();
break;
case MediaCodecInfoState.OutputFormatChanged:
Android.Util.Log.Debug("DecodeActivity", "New format " + decoder.OutputFormat);//.GetOutputFormat(outIndex));
break;
case MediaCodecInfoState.TryAgainLater:
Android.Util.Log.Debug("DecodeActivity", "dequeueOutputBuffer timed out!");
break;
default:
var buffer = outputBuffers[outIndex];// decoder.GetOutputBuffer(outIndex);
Android.Util.Log.Verbose("DecodeActivity", "render the buffer, " + buffer);
//bool gcDone = false;
// We use a very simple clock to keep the video FPS, or the video
// playback will be too fast
//This causes the next frame to not be rendered too quickly.
while (info.PresentationTimeUs / 1000 > sw.ElapsedMilliseconds)
{
await Task.Delay(10).ConfigureAwait(false);
}
//the decoder won't advance without this...
//must be called before the next decoder.dequeue call
decoder.ReleaseOutputBuffer(outIndex, true);
break;
}
} while (fs.CanRead && running);
Log.Debug("DecodeActivity", MediaCodecBufferFlags.EndOfStream.ToString());
try
{
decoder.QueueInputBuffer(inIndex, 0, 0, 0, MediaCodecBufferFlags.EndOfStream);
}
catch (Exception ex)
{
Log.Debug("DecodeActivity", "error closing decoder!");
}
}//dispose filestream,decoder, info
}
catch (Exception ex)
{
Log.Debug(this.GetType().Name, ex.ToString());
}
info = null;
decoder = null;
}