// Process a RIFF chunk element (skip the data)
public void ProcessChunk(RiffParser rp, int FourCC, int length, int paddedLength)
{
string type = RiffParser.FromFourCC(FourCC);
Debug.WriteLine("Found chunk element of type \"" +
type + "\" and length " + length.ToString());
if (type.Trim() == "fmt")
{
BinaryReader br = new BinaryReader(rp.m_stream);
var format = br.ReadUInt16();
var channels = br.ReadUInt16();
var sampleRate = br.ReadUInt32();
var bytePerSec = br.ReadUInt32();
var blockSize = br.ReadUInt16();
var bit = br.ReadUInt16();
Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
this.Info.Text = $"{channels} channels / {sampleRate} hz / {bit} bit / {bytePerSec} bytes/sec";
});
rp.SkipData(paddedLength - 16);
}
else
{
// Skip data and update bytesleft
rp.SkipData(paddedLength);
}
}
void DoInfoWindow(int windowID)
{
if (moviePlayerBase.movie != null)
{
var demux = moviePlayerBase.movie.demux;
DrawLabelValue("Demux", demux != null ? demux.GetType().ToString() : "N/A");
if (demux != null)
{
if (demux.hasVideo)
{
var videoStreamInfo = moviePlayerBase.movie.demux.videoStreamInfo;
var videoDecoder = moviePlayerBase.movie.videoDecoder;
DrawLabelValue("Video fourCC", RiffParser.FromFourCC(videoStreamInfo.codecFourCC));
DrawLabelValue("Video decoder", videoDecoder != null ? videoDecoder.GetType().ToString() : "N/A");
DrawLabelValue("bitsPerPixel", videoStreamInfo.bitsPerPixel.ToString());
DrawLabelValue("frameCount", videoStreamInfo.frameCount.ToString());
DrawLabelValue("frame size", videoStreamInfo.width + "x" + videoStreamInfo.height);
DrawLabelValue("framerate", videoStreamInfo.framerate.ToString());
DrawLabelValue("lengthBytes", videoStreamInfo.lengthBytes.ToString());
DrawLabelValue("lengthSeconds", videoStreamInfo.lengthSeconds.ToString());
}
else
{
GUILayout.Label("No video stream found");
}
if (demux.hasAudio)
{
var audioStreamInfo = moviePlayerBase.movie.demux.audioStreamInfo;
var audioDecoder = moviePlayerBase.movie.audioDecoder;
DrawLabelValue("Audio fourCC", RiffParser.FromFourCC(audioStreamInfo.codecFourCC));
DrawLabelValue("Audio decoder", audioDecoder != null ? audioDecoder.GetType().ToString() : "N/A");
DrawLabelValue("audioFormat", audioStreamInfo.audioFormat.ToString("X"));
DrawLabelValue("channels", audioStreamInfo.channels.ToString());
DrawLabelValue("sampleCount", audioStreamInfo.sampleCount.ToString());
DrawLabelValue("sampleSize", audioStreamInfo.sampleSize.ToString());
DrawLabelValue("sampleRate", audioStreamInfo.sampleRate.ToString());
DrawLabelValue("lengthBytes", audioStreamInfo.lengthBytes.ToString());
DrawLabelValue("lengthSeconds", audioStreamInfo.lengthSeconds.ToString());
}
else
{
GUILayout.Label("No audio stream found");
}
}
}
else
{
GUILayout.Label("No movie loaded");
}
GUI.DragWindow(new Rect(0, 0, 4000, 4000));
}
private static void ParseChunkIndex(AtomicBinaryReader reader, long p, ref AviStreamIndex index)
{
// read ix.. chunk id and size. do sanity check
uint ixChunkFCC = reader.ReadUInt32(ref p);
uint ixChunkFCCb = (ixChunkFCC & 0x0000FFFF) | 0x20200000;
if (ixChunkFCCb != RiffParser.ToFourCC("ix ") && ixChunkFCC != RiffParser.ToFourCC("indx"))
{
throw new MpException("Unexpected chunk id for index " + RiffParser.FromFourCC(ixChunkFCC) +
" for stream " + RiffParser.FromFourCC(index.streamId));
}
uint ixChunkSize = reader.ReadUInt32(ref p);
// read index data header and do sanity check
ushort wLongsPerEntry = reader.ReadUInt16(ref p);
byte bSubIndexType = reader.ReadByte(ref p);
byte bIndexType = reader.ReadByte(ref p);
uint nEntriesInUse = reader.ReadUInt32(ref p);
uint streamId = reader.ReadUInt32(ref p);
#if MP_DEBUG
//Debug.Log("Parsing index for " + RiffParser.FromFourCC(index.streamId));
#endif
if (bIndexType != (int)AviStreamIndex.Type.CHUNKS || bSubIndexType != 0 || streamId != index.streamId ||
wLongsPerEntry != 2 || ixChunkSize < 4 * wLongsPerEntry * nEntriesInUse + 24)
{
throw new MpException("Broken or unsupported index for stream " + RiffParser.FromFourCC(streamId) +
". " + streamId + "!=" + index.streamId + ", wLongsPerEntry=" + wLongsPerEntry +
", bIndexType=" + bIndexType + ", bSubIndexType=" + bSubIndexType);
}
long qwBaseOffset = reader.ReadInt64(ref p);
p += 4; // not caring about reserved bytes
// reading it all at once is about 10x faster than reading individual uints.
// the index chunk is not that big, so it's ok for GC too.
var uintBuf = new uint[nEntriesInUse * 2];
reader.Read(ref p, uintBuf, 0, (int)nEntriesInUse * 2);
for (int i = 0; i < nEntriesInUse; i++)
{
var entry = new AviStreamIndex.Entry();
entry.chunkOffset = qwBaseOffset + uintBuf [2 * i];
uint len = uintBuf [2 * i + 1];
entry.chunkLength = (int)(len & 0x7FFFFFFF);
if ((len & 0x80000000) == 0)
{
entry.isKeyframe = true;
}
index.entries.Add(entry);
}
}
private unsafe void DecodeAVIStream(RiffParser rp, int unpaddedLength, int length)
{
byte[] ba = new byte[length];
if (rp.ReadData(ba, 0, length) != length)
{
throw new RiffParserException("Problem reading AVI header.");
}
fixed(Byte *bp = &ba[0])
{
AVISTREAMHEADER *avi = (AVISTREAMHEADER *)bp;
if (AviRiffData.streamtypeVIDEO == avi->fccType)
{
m_vidHandler = RiffParser.FromFourCC(avi->fccHandler);
if (avi->dwScale > 0)
{
m_vidDataRate = (double)avi->dwRate / (double)avi->dwScale;
}
else
{
m_vidDataRate = 0.0;
}
}
else if (AviRiffData.streamtypeAUDIO == avi->fccType)
{
if (AviRiffData.ckidMP3 == avi->fccHandler)
{
m_audHandler = "MP3";
}
else
{
m_audHandler = RiffParser.FromFourCC(avi->fccHandler);
}
if (avi->dwScale > 0)
{
m_audDataRate = 8.0 * (double)avi->dwRate / (double)avi->dwScale;
if (avi->dwSampleSize > 0)
{
m_audDataRate /= (double)avi->dwSampleSize;
}
}
else
{
m_audDataRate = 0.0;
}
}
}
}
public async void CheckFile()
{
StorageFolder storageFolder = KnownFolders.MusicLibrary;
var checkFile = await storageFolder.TryGetItemAsync(this.Recorder.FileName);
if (checkFile == null)
{
this.Info.Text = "Wav not recorded ...";
}
else
{
StorageFile storageFile = await storageFolder.GetFileAsync(this.Recorder.FileName);
var parser = new RiffParser();
// read file
await Windows.System.Threading.ThreadPool.RunAsync(
async (workItem) =>
{
IRandomAccessStream stream = await storageFile.OpenAsync(FileAccessMode.Read);
Stream sstream = stream.AsStream();
parser.OpenFile(sstream);
// Define the processing delegates
RiffParser.ProcessChunkElement pc = ProcessChunk;
// Read all top level elements and chunks
int size = parser.DataSize;
while (size > 0)
{
// Prefix the line with the current top level type
var info = (RiffParser.FromFourCC(parser.FileType) + " (" + size.ToString() + "): ");
// Get the next element (if there is one)
if (false == parser.ReadElement(ref size, pc, null))
{
break;
}
}
// Close the stream
parser.CloseFile();
});
}
}
private void CheckFile(string filename)
{
rp.OpenFile(filename);
txtFileFormat.Text = RiffParser.FromFourCC(rp.FileRIFF);
txtFileType.Text = RiffParser.FromFourCC(rp.FileType);
if (txtFileType.Text.StartsWith("CDR"))
{
}
// Is this a type we are familiar with?
if (RiffParser.ckidAVI == rp.FileType)
{
dh.ProcessMainAVI();
lbl1a.Text = dh.FrameSize;
lbl2a.Text = dh.FrameRate;
lbl3a.Text = dh.TotalFrames;
lbl4a.Text = dh.TotalTime;
lbl5a.Text = dh.NumStreams;
lbl1b.Text = dh.ISFT;
lbl2b.Text = dh.VideoHandler;
lbl3b.Text = dh.VideoDataRate;
lbl4b.Text = dh.AudioHandler;
lbl5b.Text = dh.AudioDataRate;
pnlAVI.Visible = true;
}
else if (RiffParser.ckidWAV == rp.FileType)
{
dh.ProcessMainWAVE();
lbl1a.Text = dh.NumChannels;
lbl2a.Text = dh.BitsPerSample;
lbl3a.Text = dh.BitsPerSec;
lbl4a.Text = dh.SamplesPerSec;
pnlAVI.Visible = true;
}
else if (RiffParser.ckidRMID == rp.FileType)
{
}
rp.CloseFile();
}
private void ProcessCDRList(RiffParser rp, int FourCC, int length)
{
Console.WriteLine(String.Format("LIST:{0:s}", RiffParser.FromFourCC(FourCC)));
rp.SkipData(length);
}
private void ProcessCDRChunk(RiffParser rp, int FourCC, int unpaddedLength, int length)
{
Console.WriteLine(String.Format("Chunk:{0:s}", RiffParser.FromFourCC(FourCC)));
rp.SkipData(length);
}
private void ProcessAviChunk(RiffParser rp, uint fourCC, int unpaddedLength, int paddedLength)
{
//Debug.Log("CHUNK " + RiffParser.FromFourCC(fourCC) + " " + rp.Position + " " + unpaddedLength + " " + paddedLength);
switch (fourCC)
{
case ID_avih:
avi.avih = ParseMainHeader(rp.reader, rp.Position);
break;
case ID_strh:
AVIStreamHeader strh = ParseStreamHeader(rp.reader, rp.Position);
currentStrh4CC = strh.fccType;
if (currentStrh4CC == FCC_vids)
{
avi.strhVideo = strh;
}
else if (currentStrh4CC == FCC_auds)
{
avi.strhAudio = strh;
}
else
{
#if MP_DEBUG
Debug.LogWarning("Skipping unknown stream header with fccType=" + currentStrh4CC);
#endif
}
break;
case ID_strf:
if (currentStrh4CC == FCC_vids)
{
avi.strfVideo = ParseVideoFormatHeader(rp.reader, rp.Position);
}
else if (currentStrh4CC == FCC_auds)
{
avi.strfAudio = ParseAudioFormatHeader(rp.reader, rp.Position);
}
break;
case ID_idx1:
idx1Offset = rp.Position;
idx1Size = unpaddedLength;
// index.idx1 will be filled later in ParseIndex method
break;
case ID_dmlh: // OpenDML header
avi.odml = ParseOdmlHeader(rp.reader, rp.Position);
break;
case ID_indx: // OpenDML index
uint streamId;
var index = ParseOdmlIndex(rp.reader, rp.Position, out streamId);
if (streamId == ID_00dc || streamId == ID_00db)
{
avi.videoIndex = index;
}
else if (streamId == ID_01wb)
{
avi.audioIndex = index;
}
#if MP_DEBUG
else
{
Debug.LogWarning("Ignoring index for unknown stream " + RiffParser.FromFourCC(streamId));
}
#endif
break;
#if MP_DEBUG
default:
// comment in for logging chunks that are ignored (not relevant for us)
//Debug.Log("Ignoring CHUNK " + RiffParser.FromFourCC(fourCC) + " " + unpaddedLength + " " + paddedLength);
break;
#endif
}
}
private static AviStreamIndex ParseOdmlIndex(AtomicBinaryReader reader, long p, out uint streamId)
{
ushort wLongsPerEntry = reader.ReadUInt16(ref p);
byte bSubIndexType = reader.ReadByte(ref p);
byte bIndexType = reader.ReadByte(ref p);
uint nEntriesInUse = reader.ReadUInt32(ref p);
streamId = reader.ReadUInt32(ref p);
var index = new AviStreamIndex();
index.streamId = streamId;
// if there is AVI_INDEX_OF_CHUNKS (superindex) in this element
if (bIndexType == (byte)AviStreamIndex.Type.SUPERINDEX)
{
p += 3 * 4; // not caring about reserved bytes
#if MP_DEBUG
//Debug.Log("Parsing superindex for " + RiffParser.FromFourCC(streamId));
#endif
// sanity check
if (bSubIndexType != 0 || wLongsPerEntry != 4)
{
#if MP_DEBUG
Debug.LogWarning("Broken superindex for stream " + RiffParser.FromFourCC(streamId) +
", but trying to continue. " + bSubIndexType + " " + wLongsPerEntry);
#endif
}
for (uint i = 0; i < nEntriesInUse; i++)
{
long qwOffset = reader.ReadInt64(ref p);
int dwSize = reader.ReadInt32(ref p);
reader.ReadInt32(ref p); // dwDuration. don't care
if (qwOffset != 0)
{
long currentStreamPos = p;
p = qwOffset;
// reduce memory allocations by (over)estimating entry count from index size in bytes
index.entries.Capacity += dwSize / 8;
ParseChunkIndex(reader, p, ref index);
p = currentStreamPos;
}
}
}
// if there is AVI_INDEX_OF_CHUNKS (chunk index) in here
else if (bIndexType == (byte)AviStreamIndex.Type.CHUNKS)
{
// seek back to the beginning of this chunk (12bytes read here, 8bytes read by RiffParser)
ParseChunkIndex(reader, p - 20, ref index);
}
else
{
throw new MpException("Unsupported index type " + bIndexType +
" encountered for stream " + RiffParser.FromFourCC(streamId));
}
index.entries.TrimExcess();
return(index);
}
