/// <summary>
/// ReadQMed
/// Read different types of QMed.
/// Side-effects: sets qmed and privateCodecData vars.
/// </summary>
/// <param name="br">BinaryReader</param>
/// <param name="sampleStreamType"></param>
/// <param name="inTotalSize"></param>
private void ReadQMed(BinaryReader br, ushort sampleStreamType, int inTotalSize, ulong sampleFlags)
{
long byteCount = 0;
switch ((uint)sampleStreamType)
{
case QBOX_SAMPLE_TYPE_AAC:
QMed.QMedAAC qmedaac = new QMed.QMedAAC();
qmedaac.payloadSize = inTotalSize - mSampleHeaderSize;
#if ADTS
qmedaac.Read(br, cts);
#endif
qmed = qmedaac;
break;
//case QBOX_SAMPLE_TYPE_H264:
//case QBOX_SAMPLE_TYPE_H264_SLICE:
// QMed.QMedH264 qmedh264 = new QMed.QMedH264();
// qmed = qmedh264;
// break;
case QBOX_SAMPLE_TYPE_QPCM:
QMed.QMedPCM qmedpcm = new QMed.QMedPCM();
qmed = qmedpcm;
break;
case QBOX_SAMPLE_TYPE_Q711:
QMed.QMed711 qmed711 = new QMed.QMed711();
qmed = qmed711;
break;
case QBOX_SAMPLE_TYPE_Q722:
QMed.QMed722 qmed722 = new QMed.QMed722();
qmed = qmed722;
break;
case QBOX_SAMPLE_TYPE_Q726:
QMed.QMed726 qmed726 = new QMed.QMed726();
qmed = qmed726;
break;
case QBOX_SAMPLE_TYPE_Q728:
QMed.QMed728 qmed728 = new QMed.QMed728();
qmed = qmed728;
break;
case QBOX_SAMPLE_TYPE_JPEG:
// unknown 12-byte jpeg prefix
byte[] unknown = new byte[12];
br.Read(unknown, 0, 12);
QMed.QMedJpeg qmedJpeg = new QMed.QMedJpeg();
qmed = qmedJpeg;
break;
case QBOX_SAMPLE_TYPE_MPEG2_ELEMENTARY:
case QBOX_SAMPLE_TYPE_USER_METADATA:
case QBOX_SAMPLE_TYPE_QMA:
case QBOX_SAMPLE_TYPE_DEBUG:
case QBOX_SAMPLE_TYPE_VIN_STATS_GLOBAL:
case QBOX_SAMPLE_TYPE_VIN_STATS_MB:
break;
default:
throw new Exception(string.Format("Unexpected QBox type: {0}", sampleStreamType));
}
int count;
#if ADTS
if (qmed.GetType() != typeof(QMed.QMedAAC))
count = qmed.Read(br);
#else
count = qmed.Read(br);
#endif
if (count != (int)qmed.boxSize)
throw new Exception("QMed header count inconsistent");
mSampleHeaderSize += (int)qmed.boxSize;
byteCount = inTotalSize - count;
if (byteCount < 0)
throw new Exception("QMed read: bad box size");
if (byteCount > 0)
{
// read-in data; set mPayload, except when it's a config box
if ((sampleFlags & QBOX_SAMPLE_FLAGS_CONFIGURATION_INFO) != 0)
{
// get private codec data
privateCodecData = br.ReadBytes((int)byteCount);
mSampleHeaderSize += (int)byteCount;
byteCount = 0;
}
else // read payload now
{
mPayload = br.ReadBytes((int)byteCount);
}
}
}
public QBoxSample(int dataSize, ulong sampleFlags, ushort sampleStreamType)
{
if ((sampleFlags & QBox.QBOX_SAMPLE_FLAGS_META_INFO) != 0)
{
if (sampleStreamType == QBox.QBOX_SAMPLE_TYPE_H264)
{
if (v != null)
throw new Exception("QBoxSample.constructor: QBoxMetaV v already set");
v = new QBoxMetaV();
mSampleHeaderSize = 32;
}
else if ((sampleStreamType == QBox.QBOX_SAMPLE_TYPE_QMA) || (sampleStreamType == QBox.QBOX_SAMPLE_TYPE_AAC))
{
if (a != null)
throw new Exception("There should only be one QBoxMetaA for audio");
a = new QBoxMetaA();
mSampleHeaderSize = 24;
}
else throw new Exception("QBoxSample.Read: Sample stream type not found.");
}
else if ((sampleFlags & QBox.QBOX_SAMPLE_FLAGS_QMED_PRESENT) > 0)
{
switch ((uint)sampleStreamType)
{
case QBOX_SAMPLE_TYPE_AAC:
QMed.QMedAAC qmedaac = new QMed.QMedAAC();
qmed = qmedaac;
break;
//case QBOX_SAMPLE_TYPE_H264:
//case QBOX_SAMPLE_TYPE_H264_SLICE:
// QMed.QMedH264 qmedh264 = new QMed.QMedH264();
// qmed = qmedh264;
// break;
case QBOX_SAMPLE_TYPE_QPCM:
QMed.QMedPCM qmedpcm = new QMed.QMedPCM();
qmed = qmedpcm;
break;
case QBOX_SAMPLE_TYPE_Q711:
QMed.QMed711 qmed711 = new QMed.QMed711();
qmed = qmed711;
break;
case QBOX_SAMPLE_TYPE_Q722:
QMed.QMed722 qmed722 = new QMed.QMed722();
qmed = qmed722;
break;
case QBOX_SAMPLE_TYPE_Q726:
QMed.QMed726 qmed726 = new QMed.QMed726();
qmed = qmed726;
break;
case QBOX_SAMPLE_TYPE_Q728:
QMed.QMed728 qmed728 = new QMed.QMed728();
qmed = qmed728;
break;
case QBOX_SAMPLE_TYPE_JPEG:
case QBOX_SAMPLE_TYPE_MPEG2_ELEMENTARY:
case QBOX_SAMPLE_TYPE_USER_METADATA:
case QBOX_SAMPLE_TYPE_QMA:
case QBOX_SAMPLE_TYPE_DEBUG:
case QBOX_SAMPLE_TYPE_VIN_STATS_GLOBAL:
case QBOX_SAMPLE_TYPE_VIN_STATS_MB:
break;
default:
throw new Exception(string.Format("Unknown QMed type: {0}", sampleStreamType));
}
mSampleHeaderSize = (int)qmed.boxSize;
}
else
{
mSampleHeaderSize = 0;
}
}