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;
}
