/// <summary>
/// Handle chunk elements found in the AVI file. Ignores unknown chunks and
/// </summary>
/// <param name="rp"></param>
/// <param name="FourCC"></param>
/// <param name="unpaddedLength"></param>
/// <param name="paddedLength"></param>
private void ProcessAVIChunk(RiffParser rp, int FourCC, int unpaddedLength, int paddedLength)
{
if (AviRiffData.ckidMainAVIHeader == FourCC)
{
// Main AVI header
DecodeAVIHeader(rp, paddedLength);
}
else if (AviRiffData.ckidAVIStreamHeader == FourCC)
{
// Stream header
DecodeAVIStream(rp, paddedLength);
}
else if (AviRiffData.ckidAVIISFT == FourCC)
{
Byte[] ba = new byte[paddedLength];
rp.ReadData(ba, 0, paddedLength);
StringBuilder sb = new StringBuilder(unpaddedLength);
for (int i = 0; i < unpaddedLength; ++i)
{
if (0 != ba[i])
{
sb.Append((char)ba[i]);
}
}
m_isft = sb.ToString();
}
else
{
// Unknon chunk - skip
rp.SkipData(paddedLength);
}
}
private unsafe void DecodeAVIHeader(RiffParser rp, int length)
{
//if (length < sizeof(AVIMAINHEADER))
//{
// throw new RiffParserException(String.Format("Header size mismatch. Needed {0} but only have {1}",
// sizeof(AVIMAINHEADER), 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])
{
AVIMAINHEADER *avi = (AVIMAINHEADER *)bp;
m_frameRate = avi->dwMicroSecPerFrame;
m_height = avi->dwHeight;
m_maxBitRate = avi->dwMaxBytesPerSec;
m_numStreams = avi->dwStreams;
m_totalFrames = avi->dwTotalFrames;
m_width = avi->dwWidth;
}
}
private void ProcessWaveChunk(RiffParser rp, int FourCC, int unpaddedLength, int length)
{
// Is this a 'fmt' chunk?
if (AviRiffData.ckidWaveFMT == FourCC)
{
DecodeWave(rp, length);
}
else
{
rp.SkipData(length);
}
}
private unsafe void DecodeAVIStream(RiffParser rp, 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;
}
}
}
}
private unsafe void DecodeWave(RiffParser rp, int length)
{
byte[] ba = new byte[length];
rp.ReadData(ba, 0, length);
fixed(byte *bp = &ba[0])
{
WAVEFORMATEX *wave = (WAVEFORMATEX *)bp;
m_numChannels = wave->nChannels;
m_bitsPerSec = wave->nAvgBytesPerSec;
m_bitsPerSample = wave->wBitsPerSample;
m_samplesPerSec = wave->nSamplesPerSec;
}
}
/// <summary>
/// Handle List elements found in the AVI file. Ignores unknown lists and recursively looks
/// at the content of known lists.
/// </summary>
/// <param name="rp"></param>
/// <param name="FourCC"></param>
/// <param name="length"></param>
private void ProcessAVIList(RiffParser rp, int FourCC, int length)
{
RiffParser.ProcessChunkElement pac = ProcessAVIChunk;
RiffParser.ProcessListElement pal = ProcessAVIList;
// Is this the header?
if ((AviRiffData.ckidAVIHeaderList == FourCC) ||
(AviRiffData.ckidAVIStreamList == FourCC) ||
(AviRiffData.ckidINFOList == FourCC))
{
while (length > 0)
{
if (false == rp.ReadElement(ref length, pac, pal))
{
break;
}
}
}
else
{
// Unknown lists - ignore
rp.SkipData(length);
}
}
/// <summary>
/// The decode avi header.
/// </summary>
/// <param name="rp">
/// The rp.
/// </param>
/// <param name="length">
/// The length.
/// </param>
/// <exception cref="RiffParserException">
/// </exception>
private unsafe void DecodeAVIHeader(RiffParser rp, int length)
{
// if (length < sizeof(AVIMAINHEADER))
// {
// throw new RiffParserException(String.Format("Header size mismatch. Needed {0} but only have {1}",
// sizeof(AVIMAINHEADER), 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])
{
AVIMAINHEADER* avi = (AVIMAINHEADER*)bp;
this.m_frameRate = avi->dwMicroSecPerFrame;
this.Height = avi->dwHeight;
this.m_maxBitRate = avi->dwMaxBytesPerSec;
this.m_numStreams = avi->dwStreams;
this.TotalFrames = avi->dwTotalFrames;
this.Width = avi->dwWidth;
}
}
/// <summary>
/// Handle chunk elements found in the AVI file. Ignores unknown chunks and
/// </summary>
/// <param name="rp"></param>
/// <param name="fourCc"></param>
/// <param name="unpaddedLength"></param>
/// <param name="paddedLength"></param>
private void ProcessAviChunk(RiffParser rp, int fourCc, int unpaddedLength, int paddedLength)
{
if (AviRiffData.CkidMainAviHeader == fourCc)
{
// Main AVI header
DecodeAviHeader(rp, paddedLength);
}
else if (AviRiffData.CkidAviStreamHeader == fourCc)
{
// Stream header
DecodeAviStream(rp, paddedLength);
}
else if (AviRiffData.CkidAviisft == fourCc)
{
Byte[] ba = new byte[paddedLength];
rp.ReadData(ba, 0, paddedLength);
StringBuilder sb = new StringBuilder(unpaddedLength);
for (int i = 0; i < unpaddedLength; ++i)
{
if (0 != ba[i]) sb.Append((char)ba[i]);
}
Isft = sb.ToString();
}
else
{
// Unknon chunk - skip
rp.SkipData(paddedLength);
}
}
/// <summary>
/// Handle List elements found in the AVI file. Ignores unknown lists and recursively looks
/// at the content of known lists.
/// </summary>
/// <param name="rp"></param>
/// <param name="fourCc"></param>
/// <param name="length"></param>
private void ProcessAviList(RiffParser rp, int fourCc, int length)
{
RiffParser.ProcessChunkElement pac = ProcessAviChunk;
RiffParser.ProcessListElement pal = ProcessAviList;
// Is this the header?
if ((AviRiffData.CkidAviHeaderList == fourCc)
|| (AviRiffData.CkidAviStreamList == fourCc)
|| (AviRiffData.CkidInfoList == fourCc))
{
while (length > 0)
{
if (false == rp.ReadElement(ref length, pac, pal))
{
break;
}
}
}
else
{
// Unknown lists - ignore
rp.SkipData(length);
}
}
public RiffDecodeHeader(RiffParser rp)
{
m_parser = rp;
}
/// <summary>
/// Default list element handler - skip the entire list
/// </summary>
/// <param name="rp"></param>
/// <param name="FourCC"></param>
/// <param name="length"></param>
private void ProcessList(RiffParser rp, int FourCC, int length)
{
rp.SkipData(length);
}
/// <summary>
/// The process wave chunk.
/// </summary>
/// <param name="rp">
/// The rp.
/// </param>
/// <param name="FourCC">
/// The four cc.
/// </param>
/// <param name="unpaddedLength">
/// The unpadded length.
/// </param>
/// <param name="length">
/// The length.
/// </param>
private void ProcessWaveChunk(RiffParser rp, int FourCC, int unpaddedLength, int length)
{
// Is this a 'fmt' chunk?
if (AviRiffData.ckidWaveFMT == FourCC)
{
this.DecodeWave(rp, length);
}
else
{
rp.SkipData(length);
}
}
/// <summary>
/// The decode wave.
/// </summary>
/// <param name="rp">
/// The rp.
/// </param>
/// <param name="length">
/// The length.
/// </param>
private unsafe void DecodeWave(RiffParser rp, int length)
{
byte[] ba = new byte[length];
rp.ReadData(ba, 0, length);
fixed (byte* bp = &ba[0])
{
WAVEFORMATEX* wave = (WAVEFORMATEX*)bp;
this.m_numChannels = wave->nChannels;
this.m_bitsPerSec = wave->nAvgBytesPerSec;
this.m_bitsPerSample = wave->wBitsPerSample;
this.m_samplesPerSec = wave->nSamplesPerSec;
}
}
private void ProcessWaveChunk(RiffParser rp, int fourCc, int unpaddedLength, int length)
{
// Is this a 'fmt' chunk?
if (AviRiffData.CkidWaveFmt == fourCc)
{
DecodeWave(rp, length);
}
else
{
rp.SkipData(length);
}
}
private unsafe void DecodeWave(RiffParser rp, int length)
{
byte[] ba = new byte[length];
rp.ReadData(ba, 0, length);
fixed (byte* bp = &ba[0])
{
Waveformatex* wave = (Waveformatex*)bp;
mNumChannels = wave->nChannels;
mBitsPerSec = wave->nAvgBytesPerSec;
mBitsPerSample = wave->wBitsPerSample;
mSamplesPerSec = wave->nSamplesPerSec;
}
}
/// <summary>
/// Handle List elements found in the AVI file. Ignores unknown lists and recursively looks
/// at the content of known lists.
/// </summary>
/// <param name="rp">
/// </param>
/// <param name="FourCC">
/// </param>
/// <param name="length">
/// </param>
private void ProcessAVIList(RiffParser rp, int FourCC, int length)
{
RiffParser.ProcessChunkElement pac = this.ProcessAVIChunk;
RiffParser.ProcessListElement pal = this.ProcessAVIList;
// Is this the header?
if ((AviRiffData.ckidAVIHeaderList == FourCC) || (AviRiffData.ckidAVIStreamList == FourCC) || (AviRiffData.ckidINFOList == FourCC))
{
while (length > 0)
{
if (false == rp.ReadElement(ref length, pac, pal))
{
break;
}
}
}
else
{
// Unknown lists - ignore
rp.SkipData(length);
}
}
/// <summary>
/// Handle chunk elements found in the AVI file. Ignores unknown chunks and
/// </summary>
/// <param name="rp">
/// </param>
/// <param name="FourCC">
/// </param>
/// <param name="unpaddedLength">
/// </param>
/// <param name="paddedLength">
/// </param>
private void ProcessAVIChunk(RiffParser rp, int FourCC, int unpaddedLength, int paddedLength)
{
if (AviRiffData.ckidMainAVIHeader == FourCC)
{
// Main AVI header
this.DecodeAVIHeader(rp, paddedLength);
}
else if (AviRiffData.ckidAVIStreamHeader == FourCC)
{
// Stream header
this.DecodeAVIStream(rp, paddedLength);
}
else if (AviRiffData.ckidAVIISFT == FourCC)
{
byte[] ba = new byte[paddedLength];
rp.ReadData(ba, 0, paddedLength);
StringBuilder sb = new StringBuilder(unpaddedLength);
for (int i = 0; i < unpaddedLength; ++i)
{
if (0 != ba[i])
{
sb.Append((char)ba[i]);
}
}
this.ISFT = sb.ToString();
}
else
{
// Unknon chunk - skip
rp.SkipData(paddedLength);
}
}
/// <summary>
/// Default list element handler - skip the entire list
/// </summary>
/// <param name="rp">
/// </param>
/// <param name="FourCC">
/// </param>
/// <param name="length">
/// </param>
private void ProcessList(RiffParser rp, int FourCC, int length)
{
rp.SkipData(length);
}
/// <summary>
/// Initializes a new instance of the <see cref="RiffDecodeHeader"/> class.
/// </summary>
/// <param name="rp">
/// The rp.
/// </param>
public RiffDecodeHeader(RiffParser rp)
{
this.Parser = rp;
}
public RiffDecodeHeader(RiffParser rp)
{
m_parser = rp;
}
/// <summary>
/// The decode avi stream.
/// </summary>
/// <param name="rp">
/// The rp.
/// </param>
/// <param name="length">
/// The length.
/// </param>
/// <exception cref="RiffParserException">
/// </exception>
private unsafe void DecodeAVIStream(RiffParser rp, 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)
{
this.VideoHandler = RiffParser.FromFourCC(avi->fccHandler);
if (avi->dwScale > 0)
{
this.m_vidDataRate = avi->dwRate / (double)avi->dwScale;
}
else
{
this.m_vidDataRate = 0.0;
}
}
else if (AviRiffData.streamtypeAUDIO == avi->fccType)
{
if (AviRiffData.ckidMP3 == avi->fccHandler)
{
this.m_audHandler = "MP3";
}
else
{
this.m_audHandler = RiffParser.FromFourCC(avi->fccHandler);
}
if (avi->dwScale > 0)
{
this.m_audDataRate = 8.0 * avi->dwRate / avi->dwScale;
if (avi->dwSampleSize > 0)
{
this.m_audDataRate /= avi->dwSampleSize;
}
}
else
{
this.m_audDataRate = 0.0;
}
}
}
}
private unsafe void DecodeAviStream(RiffParser rp, 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)
{
mVidHandler = RiffParser.FromFourCc(avi->fccHandler);
if (avi->dwScale > 0)
{
mVidDataRate = (double)avi->dwRate / (double)avi->dwScale;
}
else
{
mVidDataRate = 0.0;
}
}
else if (AviRiffData.StreamtypeAudio == avi->fccType)
{
mAudHandler = AviRiffData.CkidMp3 == avi->fccHandler ? "MP3" : RiffParser.FromFourCc(avi->fccHandler);
if (avi->dwScale > 0)
{
mAudDataRate = 8.0 * avi->dwRate / avi->dwScale;
if (avi->dwSampleSize > 0)
{
mAudDataRate /= avi->dwSampleSize;
}
}
else
{
mAudDataRate = 0.0;
}
}
}
}
