public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
stream.IsVBR = true;
stream.IsInitialized = true;
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
long bitrate,
ref string tag)
{
if (stream.IsInitialized) return;
bool syncFound = false;
uint sync = 0;
for (int i = 0; i < buffer.Length; i++)
{
sync = (sync << 8) + buffer.ReadByte();
if (sync == 0x7FFE8001)
{
syncFound = true;
break;
}
}
if (!syncFound) return;
int frame_type = buffer.ReadBits(1);
int samples_deficit = buffer.ReadBits(5);
int crc_present = buffer.ReadBits(1);
int sample_blocks = buffer.ReadBits(7);
int frame_size = buffer.ReadBits(14);
if (frame_size < 95)
{
return;
}
int amode = buffer.ReadBits(6);
int sample_rate = buffer.ReadBits(4);
if (sample_rate < 0 || sample_rate >= dca_sample_rates.Length)
{
return;
}
int bit_rate = buffer.ReadBits(5);
if (bit_rate < 0 || bit_rate >= dca_bit_rates.Length)
{
return;
}
int downmix = buffer.ReadBits(1);
int dynrange = buffer.ReadBits(1);
int timestamp = buffer.ReadBits(1);
int aux_data = buffer.ReadBits(1);
int hdcd = buffer.ReadBits(1);
int ext_descr = buffer.ReadBits(3);
int ext_coding = buffer.ReadBits(1);
int aspf = buffer.ReadBits(1);
int lfe = buffer.ReadBits(2);
int predictor_history = buffer.ReadBits(1);
if (crc_present == 1)
{
int crc = buffer.ReadBits(16);
}
int multirate_inter = buffer.ReadBits(1);
int version = buffer.ReadBits(4);
int copy_history = buffer.ReadBits(2);
int source_pcm_res = buffer.ReadBits(3);
int front_sum = buffer.ReadBits(1);
int surround_sum = buffer.ReadBits(1);
int dialog_norm = buffer.ReadBits(4);
if (source_pcm_res < 0 || source_pcm_res >= dca_bits_per_sample.Length)
{
return;
}
int subframes = buffer.ReadBits(4);
int total_channels = buffer.ReadBits(3) + 1 + ext_coding;
stream.SampleRate = dca_sample_rates[sample_rate];
stream.ChannelCount = total_channels;
stream.LFE = (lfe > 0 ? 1 : 0);
stream.BitDepth = dca_bits_per_sample[source_pcm_res];
stream.DialNorm = -dialog_norm;
if ((source_pcm_res & 0x1) == 0x1)
{
stream.AudioMode = TSAudioMode.Extended;
}
stream.BitRate = (uint)dca_bit_rates[bit_rate];
switch (stream.BitRate)
{
case 1:
if (bitrate > 0)
{
stream.BitRate = bitrate;
stream.IsVBR = false;
stream.IsInitialized = true;
}
else
{
stream.BitRate = 0;
}
break;
case 2:
case 3:
stream.IsVBR = true;
stream.IsInitialized = true;
break;
default:
stream.IsVBR = false;
stream.IsInitialized = true;
break;
}
}
public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
uint parse = 0;
byte accessUnitDelimiterParse = 0;
byte sequenceParameterSetParse = 0;
string profile = null;
string level = null;
byte constraintSet0Flag = 0;
byte constraintSet1Flag = 0;
byte constraintSet2Flag = 0;
byte constraintSet3Flag = 0;
for (int i = 0; i < buffer.Length; i++)
{
parse = (parse << 8) + buffer.ReadByte();
if (parse == 0x00000109)
{
accessUnitDelimiterParse = 1;
}
else if (accessUnitDelimiterParse > 0)
{
--accessUnitDelimiterParse;
if (accessUnitDelimiterParse == 0)
{
switch ((parse & 0xFF) >> 5)
{
case 0: // I
case 3: // SI
case 5: // I, SI
tag = "I";
break;
case 1: // I, P
case 4: // SI, SP
case 6: // I, SI, P, SP
tag = "P";
break;
case 2: // I, P, B
case 7: // I, SI, P, SP, B
tag = "B";
break;
}
if (stream.IsInitialized) return;
}
}
else if (parse == 0x00000127 || parse == 0x00000167)
{
sequenceParameterSetParse = 3;
}
else if (sequenceParameterSetParse > 0)
{
--sequenceParameterSetParse;
switch (sequenceParameterSetParse)
{
case 2:
switch (parse & 0xFF)
{
case 66:
profile = "Baseline Profile";
break;
case 77:
profile = "Main Profile";
break;
case 88:
profile = "Extended Profile";
break;
case 100:
profile = "High Profile";
break;
case 110:
profile = "High 10 Profile";
break;
case 122:
profile = "High 4:2:2 Profile";
break;
case 144:
profile = "High 4:4:4 Profile";
break;
default:
profile = "Unknown Profile";
break;
}
break;
case 1:
constraintSet0Flag = (byte)
((parse & 0x80) >> 7);
constraintSet1Flag = (byte)
((parse & 0x40) >> 6);
constraintSet2Flag = (byte)
((parse & 0x20) >> 5);
constraintSet3Flag = (byte)
((parse & 0x10) >> 4);
break;
case 0:
byte b = (byte)(parse & 0xFF);
if (b == 11 && constraintSet3Flag == 1)
{
level = "1b";
}
else
{
level = string.Format(
"{0:D}.{1:D}",
b / 10, (b - ((b / 10) * 10)));
}
stream.EncodingProfile = string.Format(
"{0} {1}", profile, level);
stream.IsVBR = true;
stream.IsInitialized = true;
break;
}
}
}
return;
}
public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
int parse = 0;
byte frameHeaderParse = 0;
byte sequenceHeaderParse = 0;
bool isInterlaced = false;
for (int i = 0; i < buffer.Length; i++)
{
parse = (parse << 8) + buffer.ReadByte();
if (parse == 0x0000010D)
{
frameHeaderParse = 4;
}
else if (frameHeaderParse > 0)
{
--frameHeaderParse;
if (frameHeaderParse == 0)
{
uint pictureType = 0;
if (isInterlaced)
{
if ((parse & 0x80000000) == 0)
{
pictureType =
(uint)((parse & 0x78000000) >> 13);
}
else
{
pictureType =
(uint)((parse & 0x3c000000) >> 12);
}
}
else
{
pictureType =
(uint)((parse & 0xf0000000) >> 14);
}
if ((pictureType & 0x20000) == 0)
{
tag = "P";
}
else if ((pictureType & 0x10000) == 0)
{
tag = "B";
}
else if ((pictureType & 0x8000) == 0)
{
tag = "I";
}
else if ((pictureType & 0x4000) == 0)
{
tag = "B"; // TODO: "BI"
}
else
{
tag = null;
}
if (stream.IsInitialized) return;
}
}
else if (parse == 0x0000010F)
{
sequenceHeaderParse = 6;
}
else if (sequenceHeaderParse > 0)
{
--sequenceHeaderParse;
switch (sequenceHeaderParse)
{
case 5:
int profileLevel = ((parse & 0x38) >> 3);
if (((parse & 0xC0) >> 6) == 3)
{
stream.EncodingProfile = string.Format(
"Advanced Profile {0}", profileLevel);
}
else
{
stream.EncodingProfile = string.Format(
"Main Profile {0}", profileLevel);
}
break;
case 0:
if (((parse & 0x40) >> 6) > 0)
{
isInterlaced = true;
}
else
{
isInterlaced = false;
}
break;
}
stream.IsVBR = true;
stream.IsInitialized = true;
}
}
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized) return;
byte[] sync = buffer.ReadBytes(2);
if (sync == null ||
sync[0] != 0x0B ||
sync[1] != 0x77)
{
return;
}
int sr_code = 0;
int frame_size = 0;
int frame_size_code = 0;
int channel_mode = 0;
int lfe_on = 0;
int dial_norm = 0;
int num_blocks = 0;
byte[] hdr = buffer.ReadBytes(4);
int bsid = (hdr[3] & 0xF8) >> 3;
buffer.Seek(-4, SeekOrigin.Current);
if (bsid <= 10)
{
byte[] crc = buffer.ReadBytes(2);
sr_code = buffer.ReadBits(2);
frame_size_code = buffer.ReadBits(6);
bsid = buffer.ReadBits(5);
int bsmod = buffer.ReadBits(3);
channel_mode = buffer.ReadBits(3);
int cmixlev = 0;
if (((channel_mode & 0x1) > 0) && (channel_mode != 0x1))
{
cmixlev = buffer.ReadBits(2);
}
int surmixlev = 0;
if ((channel_mode & 0x4) > 0)
{
surmixlev = buffer.ReadBits(2);
}
int dsurmod = 0;
if (channel_mode == 0x2)
{
dsurmod = buffer.ReadBits(2);
if (dsurmod == 0x2)
{
stream.AudioMode = TSAudioMode.Surround;
}
}
lfe_on = buffer.ReadBits(1);
dial_norm = buffer.ReadBits(5);
int compr = 0;
if (1 == buffer.ReadBits(1))
{
compr = buffer.ReadBits(8);
}
int langcod = 0;
if (1 == buffer.ReadBits(1))
{
langcod = buffer.ReadBits(8);
}
int mixlevel = 0;
int roomtyp = 0;
if (1 == buffer.ReadBits(1))
{
mixlevel = buffer.ReadBits(5);
roomtyp = buffer.ReadBits(2);
}
if (channel_mode == 0)
{
int dialnorm2 = buffer.ReadBits(5);
int compr2 = 0;
if (1 == buffer.ReadBits(1))
{
compr2 = buffer.ReadBits(8);
}
int langcod2 = 0;
if (1 == buffer.ReadBits(1))
{
langcod2 = buffer.ReadBits(8);
}
int mixlevel2 = 0;
int roomtyp2 = 0;
if (1 == buffer.ReadBits(1))
{
mixlevel2 = buffer.ReadBits(5);
roomtyp2 = buffer.ReadBits(2);
}
}
int copyrightb = buffer.ReadBits(1);
int origbs = buffer.ReadBits(1);
if (bsid == 6)
{
if (1 == buffer.ReadBits(1))
{
int dmixmod = buffer.ReadBits(2);
int ltrtcmixlev = buffer.ReadBits(3);
int ltrtsurmixlev = buffer.ReadBits(3);
int lorocmixlev = buffer.ReadBits(3);
int lorosurmixlev = buffer.ReadBits(3);
}
if (1 == buffer.ReadBits(1))
{
int dsurexmod = buffer.ReadBits(2);
int dheadphonmod = buffer.ReadBits(2);
if (dheadphonmod == 0x2)
{
// TODO
}
int adconvtyp = buffer.ReadBits(1);
int xbsi2 = buffer.ReadBits(8);
int encinfo = buffer.ReadBits(1);
if (dsurexmod == 2)
{
stream.AudioMode = TSAudioMode.Extended;
}
}
}
}
else
{
int frame_type = buffer.ReadBits(2);
int substreamid = buffer.ReadBits(3);
frame_size = (buffer.ReadBits(11) + 1) << 1;
sr_code = buffer.ReadBits(2);
if (sr_code == 3)
{
sr_code = buffer.ReadBits(2);
}
else
{
num_blocks = buffer.ReadBits(2);
}
channel_mode = buffer.ReadBits(3);
lfe_on = buffer.ReadBits(1);
}
switch (channel_mode)
{
case 0: // 1+1
stream.ChannelCount = 2;
if (stream.AudioMode == TSAudioMode.Unknown)
{
stream.AudioMode = TSAudioMode.DualMono;
}
break;
case 1: // 1/0
stream.ChannelCount = 1;
break;
case 2: // 2/0
stream.ChannelCount = 2;
if (stream.AudioMode == TSAudioMode.Unknown)
{
stream.AudioMode = TSAudioMode.Stereo;
}
break;
case 3: // 3/0
stream.ChannelCount = 3;
break;
case 4: // 2/1
stream.ChannelCount = 3;
break;
case 5: // 3/1
stream.ChannelCount = 4;
break;
case 6: // 2/2
stream.ChannelCount = 4;
break;
case 7: // 3/2
stream.ChannelCount = 5;
break;
default:
stream.ChannelCount = 0;
break;
}
switch (sr_code)
{
case 0:
stream.SampleRate = 48000;
break;
case 1:
stream.SampleRate = 44100;
break;
case 2:
stream.SampleRate = 32000;
break;
default:
stream.SampleRate = 0;
break;
}
if (bsid <= 10)
{
switch (frame_size_code >> 1)
{
case 18:
stream.BitRate = 640000;
break;
case 17:
stream.BitRate = 576000;
break;
case 16:
stream.BitRate = 512000;
break;
case 15:
stream.BitRate = 448000;
break;
case 14:
stream.BitRate = 384000;
break;
case 13:
stream.BitRate = 320000;
break;
case 12:
stream.BitRate = 256000;
break;
case 11:
stream.BitRate = 224000;
break;
case 10:
stream.BitRate = 192000;
break;
case 9:
stream.BitRate = 160000;
break;
case 8:
stream.BitRate = 128000;
break;
case 7:
stream.BitRate = 112000;
break;
case 6:
stream.BitRate = 96000;
break;
case 5:
stream.BitRate = 80000;
break;
case 4:
stream.BitRate = 64000;
break;
case 3:
stream.BitRate = 56000;
break;
case 2:
stream.BitRate = 48000;
break;
case 1:
stream.BitRate = 40000;
break;
case 0:
stream.BitRate = 32000;
break;
default:
stream.BitRate = 0;
break;
}
}
else
{
stream.BitRate = (long)
(4.0 * frame_size * stream.SampleRate / (num_blocks * 256));
}
stream.LFE = lfe_on;
if (stream.StreamType != TSStreamType.AC3_PLUS_AUDIO &&
stream.StreamType != TSStreamType.AC3_PLUS_SECONDARY_AUDIO)
{
stream.DialNorm = dial_norm - 31;
}
stream.IsVBR = false;
stream.IsInitialized = true;
}
public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
int parse = 0;
int pictureParse = 0;
int sequenceHeaderParse = 0;
int extensionParse = 0;
int sequenceExtensionParse = 0;
for (int i = 0; i < buffer.Length; i++)
{
parse = (parse << 8) + buffer.ReadByte();
if (parse == 0x00000100)
{
pictureParse = 2;
}
else if (parse == 0x000001B3)
{
sequenceHeaderParse = 7;
}
else if (sequenceHeaderParse > 0)
{
--sequenceHeaderParse;
switch (sequenceHeaderParse)
{
#if DEBUG
case 6:
break;
case 5:
break;
case 4:
stream.Width =
(int)((parse & 0xFFF000) >> 12);
stream.Height =
(int)(parse & 0xFFF);
break;
case 3:
stream.AspectRatio =
(TSAspectRatio)((parse & 0xF0) >> 4);
switch ((parse & 0xF0) >> 4)
{
case 0: // Forbidden
break;
case 1: // Square
break;
case 2: // 4:3
break;
case 3: // 16:9
break;
case 4: // 2.21:1
break;
default: // Reserved
break;
}
switch (parse & 0xF)
{
case 0: // Forbidden
break;
case 1: // 23.976
stream.FrameRateEnumerator = 24000;
stream.FrameRateDenominator = 1001;
break;
case 2: // 24
stream.FrameRateEnumerator = 24000;
stream.FrameRateDenominator = 1000;
break;
case 3: // 25
stream.FrameRateEnumerator = 25000;
stream.FrameRateDenominator = 1000;
break;
case 4: // 29.97
stream.FrameRateEnumerator = 30000;
stream.FrameRateDenominator = 1001;
break;
case 5: // 30
stream.FrameRateEnumerator = 30000;
stream.FrameRateDenominator = 1000;
break;
case 6: // 50
stream.FrameRateEnumerator = 50000;
stream.FrameRateDenominator = 1000;
break;
case 7: // 59.94
stream.FrameRateEnumerator = 60000;
stream.FrameRateDenominator = 1001;
break;
case 8: // 60
stream.FrameRateEnumerator = 60000;
stream.FrameRateDenominator = 1000;
break;
default: // Reserved
stream.FrameRateEnumerator = 0;
stream.FrameRateDenominator = 0;
break;
}
break;
case 2:
break;
case 1:
break;
#endif
case 0:
#if DEBUG
stream.BitRate =
(((parse & 0xFFFFC0) >> 6) * 200);
#endif
stream.IsVBR = true;
stream.IsInitialized = true;
break;
}
}
else if (pictureParse > 0)
{
--pictureParse;
if (pictureParse == 0)
{
switch ((parse & 0x38) >> 3)
{
case 1:
tag = "I";
break;
case 2:
tag = "P";
break;
case 3:
tag = "B";
break;
default:
break;
}
if (stream.IsInitialized) return;
}
}
else if (parse == 0x000001B5)
{
extensionParse = 1;
}
else if (extensionParse > 0)
{
--extensionParse;
if (extensionParse == 0)
{
if ((parse & 0xF0) == 0x10)
{
sequenceExtensionParse = 1;
}
}
}
else if (sequenceExtensionParse > 0)
{
--sequenceExtensionParse;
#if DEBUG
if (sequenceExtensionParse == 0)
{
uint sequenceExtension =
((parse & 0x8) >> 3);
if (sequenceExtension == 0)
{
stream.IsInterlaced = true;
}
else
{
stream.IsInterlaced = false;
}
}
#endif
}
}
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
long bitrate,
ref string tag)
{
if (stream.IsInitialized &&
(stream.StreamType == TSStreamType.DTS_HD_SECONDARY_AUDIO ||
(stream.CoreStream != null &&
stream.CoreStream.IsInitialized))) return;
bool syncFound = false;
uint sync = 0;
for (int i = 0; i < buffer.Length; i++)
{
sync = (sync << 8) + buffer.ReadByte();
if (sync == 0x64582025)
{
syncFound = true;
break;
}
}
if (!syncFound)
{
tag = "CORE";
if (stream.CoreStream == null)
{
stream.CoreStream = new TSAudioStream();
stream.CoreStream.StreamType = TSStreamType.DTS_AUDIO;
}
if (!stream.CoreStream.IsInitialized)
{
buffer.BeginRead();
TSCodecDTS.Scan(stream.CoreStream, buffer, bitrate, ref tag);
}
return;
}
tag = "HD";
int temp1 = buffer.ReadBits(8);
int nuSubStreamIndex = buffer.ReadBits(2);
int nuExtSSHeaderSize = 0;
int nuExtSSFSize = 0;
int bBlownUpHeader = buffer.ReadBits(1);
if (1 == bBlownUpHeader)
{
nuExtSSHeaderSize = buffer.ReadBits(12) + 1;
nuExtSSFSize = buffer.ReadBits(20) + 1;
}
else
{
nuExtSSHeaderSize = buffer.ReadBits(8) + 1;
nuExtSSFSize = buffer.ReadBits(16) + 1;
}
int nuNumAudioPresent = 1;
int nuNumAssets = 1;
int bStaticFieldsPresent = buffer.ReadBits(1);
if (1 == bStaticFieldsPresent)
{
int nuRefClockCode = buffer.ReadBits(2);
int nuExSSFrameDurationCode = buffer.ReadBits(3) + 1;
long nuTimeStamp = 0;
if (1 == buffer.ReadBits(1))
{
nuTimeStamp = (buffer.ReadBits(18) << 18) + buffer.ReadBits(18);
}
nuNumAudioPresent = buffer.ReadBits(3) + 1;
nuNumAssets = buffer.ReadBits(3) + 1;
int[] nuActiveExSSMask = new int[nuNumAudioPresent];
for (int i = 0; i < nuNumAudioPresent; i++)
{
nuActiveExSSMask[i] = buffer.ReadBits(nuSubStreamIndex + 1); //?
}
for (int i = 0; i < nuNumAudioPresent; i++)
{
for (int j = 0; j < nuSubStreamIndex + 1; j++)
{
if (((j + 1) % 2) == 1)
{
int mask = buffer.ReadBits(8);
}
}
}
if (1 == buffer.ReadBits(1))
{
int nuMixMetadataAdjLevel = buffer.ReadBits(2);
int nuBits4MixOutMask = buffer.ReadBits(2) * 4 + 4;
int nuNumMixOutConfigs = buffer.ReadBits(2) + 1;
int[] nuMixOutChMask = new int[nuNumMixOutConfigs];
for (int i = 0; i < nuNumMixOutConfigs; i++)
{
nuMixOutChMask[i] = buffer.ReadBits(nuBits4MixOutMask);
}
}
}
int[] AssetSizes = new int[nuNumAssets];
for (int i = 0; i < nuNumAssets; i++)
{
if (1 == bBlownUpHeader)
{
AssetSizes[i] = buffer.ReadBits(20) + 1;
}
else
{
AssetSizes[i] = buffer.ReadBits(16) + 1;
}
}
for (int i = 0; i < nuNumAssets; i++)
{
long bufferPosition = buffer.Position;
int nuAssetDescriptorFSIZE = buffer.ReadBits(9) + 1;
int DescriptorDataForAssetIndex = buffer.ReadBits(3);
if (1 == bStaticFieldsPresent)
{
int AssetTypeDescrPresent = buffer.ReadBits(1);
if (1 == AssetTypeDescrPresent)
{
int AssetTypeDescriptor = buffer.ReadBits(4);
}
int LanguageDescrPresent = buffer.ReadBits(1);
if (1 == LanguageDescrPresent)
{
int LanguageDescriptor = buffer.ReadBits(24);
}
int bInfoTextPresent = buffer.ReadBits(1);
if (1 == bInfoTextPresent)
{
int nuInfoTextByteSize = buffer.ReadBits(10) + 1;
int[] InfoText = new int[nuInfoTextByteSize];
for (int j = 0; j < nuInfoTextByteSize; j++)
{
InfoText[j] = buffer.ReadBits(8);
}
}
int nuBitResolution = buffer.ReadBits(5) + 1;
int nuMaxSampleRate = buffer.ReadBits(4);
int nuTotalNumChs = buffer.ReadBits(8) + 1;
int bOne2OneMapChannels2Speakers = buffer.ReadBits(1);
int nuSpkrActivityMask = 0;
if (1 == bOne2OneMapChannels2Speakers)
{
int bEmbeddedStereoFlag = 0;
if (nuTotalNumChs > 2)
{
bEmbeddedStereoFlag = buffer.ReadBits(1);
}
int bEmbeddedSixChFlag = 0;
if (nuTotalNumChs > 6)
{
bEmbeddedSixChFlag = buffer.ReadBits(1);
}
int bSpkrMaskEnabled = buffer.ReadBits(1);
int nuNumBits4SAMask = 0;
if (1 == bSpkrMaskEnabled)
{
nuNumBits4SAMask = buffer.ReadBits(2);
nuNumBits4SAMask = nuNumBits4SAMask * 4 + 4;
nuSpkrActivityMask = buffer.ReadBits(nuNumBits4SAMask);
}
// TODO...
}
stream.SampleRate = SampleRates[nuMaxSampleRate];
stream.BitDepth = nuBitResolution;
stream.LFE = 0;
if ((nuSpkrActivityMask & 0x8) == 0x8)
{
++stream.LFE;
}
if ((nuSpkrActivityMask & 0x1000) == 0x1000)
{
++stream.LFE;
}
stream.ChannelCount = nuTotalNumChs - stream.LFE;
}
if (nuNumAssets > 1)
{
// TODO...
break;
}
}
// TODO
if (stream.CoreStream != null)
{
TSAudioStream coreStream = (TSAudioStream)stream.CoreStream;
if (coreStream.AudioMode == TSAudioMode.Extended &&
stream.ChannelCount == 5)
{
stream.AudioMode = TSAudioMode.Extended;
}
/*
if (coreStream.DialNorm != 0)
{
stream.DialNorm = coreStream.DialNorm;
}
*/
}
if (stream.StreamType == TSStreamType.DTS_HD_MASTER_AUDIO)
{
stream.IsVBR = true;
stream.IsInitialized = true;
}
else if (bitrate > 0)
{
stream.IsVBR = false;
stream.BitRate = bitrate;
if (stream.CoreStream != null)
{
stream.BitRate += stream.CoreStream.BitRate;
stream.IsInitialized = true;
}
stream.IsInitialized = (stream.BitRate > 0 ? true : false);
}
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized &&
stream.CoreStream != null &&
stream.CoreStream.IsInitialized) return;
bool syncFound = false;
uint sync = 0;
for (int i = 0; i < buffer.Length; i++)
{
sync = (sync << 8) + buffer.ReadByte();
if (sync == 0xF8726FBA)
{
syncFound = true;
break;
}
}
if (!syncFound)
{
tag = "CORE";
if (stream.CoreStream == null)
{
stream.CoreStream = new TSAudioStream();
stream.CoreStream.StreamType = TSStreamType.AC3_AUDIO;
}
if (!stream.CoreStream.IsInitialized)
{
buffer.BeginRead();
TSCodecAC3.Scan(stream.CoreStream, buffer, ref tag);
}
return;
}
tag = "HD";
int ratebits = buffer.ReadBits(4);
if (ratebits != 0xF)
{
stream.SampleRate =
(((ratebits & 8) > 0 ? 44100 : 48000) << (ratebits & 7));
}
int temp1 = buffer.ReadBits(8);
int channels_thd_stream1 = buffer.ReadBits(5);
int temp2 = buffer.ReadBits(2);
stream.ChannelCount = 0;
stream.LFE = 0;
int c_LFE2 = buffer.ReadBits(1);
if (c_LFE2 == 1)
{
stream.LFE += 1;
}
int c_Cvh = buffer.ReadBits(1);
if (c_Cvh == 1)
{
stream.ChannelCount += 1;
}
int c_LRw = buffer.ReadBits(1);
if (c_LRw == 1)
{
stream.ChannelCount += 2;
}
int c_LRsd = buffer.ReadBits(1);
if (c_LRsd == 1)
{
stream.ChannelCount += 2;
}
int c_Ts = buffer.ReadBits(1);
if (c_Ts == 1)
{
stream.ChannelCount += 1;
}
int c_Cs = buffer.ReadBits(1);
if (c_Cs == 1)
{
stream.ChannelCount += 1;
}
int c_LRrs = buffer.ReadBits(1);
if (c_LRrs == 1)
{
stream.ChannelCount += 2;
}
int c_LRc = buffer.ReadBits(1);
if (c_LRc == 1)
{
stream.ChannelCount += 2;
}
int c_LRvh = buffer.ReadBits(1);
if (c_LRvh == 1)
{
stream.ChannelCount += 2;
}
int c_LRs = buffer.ReadBits(1);
if (c_LRs == 1)
{
stream.ChannelCount += 2;
}
int c_LFE = buffer.ReadBits(1);
if (c_LFE == 1)
{
stream.LFE += 1;
}
int c_C = buffer.ReadBits(1);
if (c_C == 1)
{
stream.ChannelCount += 1;
}
int c_LR = buffer.ReadBits(1);
if (c_LR == 1)
{
stream.ChannelCount += 2;
}
int access_unit_size = 40 << (ratebits & 7);
int access_unit_size_pow2 = 64 << (ratebits & 7);
buffer.ReadBits(24);
buffer.ReadBits(24);
int is_vbr = buffer.ReadBits(1);
int peak_bitrate = buffer.ReadBits(15);
peak_bitrate = (peak_bitrate * stream.SampleRate) >> 4;
double peak_bitdepth =
(double)peak_bitrate /
(stream.ChannelCount + stream.LFE) /
stream.SampleRate;
if (peak_bitdepth > 14)
{
stream.BitDepth = 24;
}
else
{
stream.BitDepth = 16;
}
#if DEBUG
System.Diagnostics.Debug.WriteLine(string.Format(
"{0}\t{1}\t{2:F2}",
stream.PID, peak_bitrate, peak_bitdepth));
#endif
stream.IsVBR = true;
stream.IsInitialized = true;
}
private bool ScanStream(
TSStream stream,
TSStreamState streamState,
TSStreamBuffer buffer)
{
streamState.StreamTag = null;
long bitrate = 0;
if (stream.IsAudioStream &&
streamState.PTSTransfer > 0)
{
bitrate = (long)Math.Round(
(buffer.TransferLength * 8.0) /
((double)streamState.PTSTransfer / 90000));
if (bitrate > streamState.PeakTransferRate)
{
streamState.PeakTransferRate = bitrate;
}
}
if (buffer.TransferLength > streamState.PeakTransferLength)
{
streamState.PeakTransferLength = buffer.TransferLength;
}
buffer.BeginRead();
switch (stream.StreamType)
{
case TSStreamType.MPEG2_VIDEO:
TSCodecMPEG2.Scan(
(TSVideoStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.AVC_VIDEO:
TSCodecAVC.Scan(
(TSVideoStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.MVC_VIDEO:
TSCodecMVC.Scan(
(TSVideoStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.VC1_VIDEO:
TSCodecVC1.Scan(
(TSVideoStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.AC3_AUDIO:
TSCodecAC3.Scan(
(TSAudioStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.AC3_PLUS_AUDIO:
case TSStreamType.AC3_PLUS_SECONDARY_AUDIO:
TSCodecAC3.Scan(
(TSAudioStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.AC3_TRUE_HD_AUDIO:
TSCodecTrueHD.Scan(
(TSAudioStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.LPCM_AUDIO:
TSCodecLPCM.Scan(
(TSAudioStream)stream, buffer, ref streamState.StreamTag);
break;
case TSStreamType.DTS_AUDIO:
TSCodecDTS.Scan(
(TSAudioStream)stream, buffer, bitrate, ref streamState.StreamTag);
break;
case TSStreamType.DTS_HD_AUDIO:
case TSStreamType.DTS_HD_MASTER_AUDIO:
case TSStreamType.DTS_HD_SECONDARY_AUDIO:
TSCodecDTSHD.Scan(
(TSAudioStream)stream, buffer, bitrate, ref streamState.StreamTag);
break;
default:
stream.IsInitialized = true;
break;
}
buffer.EndRead();
streamState.StreamBuffer.Reset();
bool isAVC = false;
bool isMVC = false;
foreach (TSStream finishedStream in Streams.Values)
{
if (!finishedStream.IsInitialized)
{
return false;
}
if (finishedStream.StreamType == TSStreamType.AVC_VIDEO)
{
isAVC = true;
}
if (finishedStream.StreamType == TSStreamType.MVC_VIDEO)
{
isMVC = true;
}
}
if (isMVC && !isAVC)
{
return false;
}
return true;
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized) return;
byte[] header = buffer.ReadBytes(4);
int flags = (header[2] << 8) + header[3];
switch ((flags & 0xF000) >> 12)
{
case 1: // 1/0/0
stream.ChannelCount = 1;
stream.LFE = 0;
break;
case 3: // 2/0/0
stream.ChannelCount = 2;
stream.LFE = 0;
break;
case 4: // 3/0/0
stream.ChannelCount = 3;
stream.LFE = 0;
break;
case 5: // 2/1/0
stream.ChannelCount = 3;
stream.LFE = 0;
break;
case 6: // 3/1/0
stream.ChannelCount = 4;
stream.LFE = 0;
break;
case 7: // 2/2/0
stream.ChannelCount = 4;
stream.LFE = 0;
break;
case 8: // 3/2/0
stream.ChannelCount = 5;
stream.LFE = 0;
break;
case 9: // 3/2/1
stream.ChannelCount = 5;
stream.LFE = 1;
break;
case 10: // 3/4/0
stream.ChannelCount = 7;
stream.LFE = 0;
break;
case 11: // 3/4/1
stream.ChannelCount = 7;
stream.LFE = 1;
break;
default:
stream.ChannelCount = 0;
stream.LFE = 0;
break;
}
switch ((flags & 0xC0) >> 6)
{
case 1:
stream.BitDepth = 16;
break;
case 2:
stream.BitDepth = 20;
break;
case 3:
stream.BitDepth = 24;
break;
default:
stream.BitDepth = 0;
break;
}
switch ((flags & 0xF00) >> 8)
{
case 1:
stream.SampleRate = 48000;
break;
case 4:
stream.SampleRate = 96000;
break;
case 5:
stream.SampleRate = 192000;
break;
default:
stream.SampleRate = 0;
break;
}
stream.BitRate = (uint)
(stream.SampleRate * stream.BitDepth *
(stream.ChannelCount + stream.LFE));
stream.IsVBR = false;
stream.IsInitialized = true;
}
public void Scan(TSAudioStream stream, TSStreamBuffer buffer, ref string tag, long?bitrate)
{
if (stream.IsInitialized && stream.CoreStream != null && stream.CoreStream.IsInitialized)
{
return;
}
var syncFound = false;
uint sync = 0;
for (var i = 0; i < buffer.Length; i++)
{
sync = (sync << 8) + buffer.ReadByte();
if (sync == 0xF8726FBA)
{
syncFound = true;
break;
}
}
if (!syncFound)
{
tag = "CORE";
stream.CoreStream ??= new TSAudioStream {
StreamType = TSStreamType.AC3_AUDIO
};
if (stream.CoreStream.IsInitialized)
{
return;
}
buffer.BeginRead();
(new TSCodecAC3()).Scan(stream.CoreStream, buffer, ref tag, bitrate);
return;
}
tag = "HD";
int ratebits = buffer.ReadBits2(4);
if (ratebits != 0xF)
{
stream.SampleRate = ((ratebits & 8) > 0 ? 44100 : 48000) << (ratebits & 7);
}
buffer.BSSkipBits(15);
stream.ChannelCount = 0;
stream.LFE = 0;
if (buffer.ReadBool())
{
stream.LFE += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
if (buffer.ReadBool())
{
stream.LFE += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 1;
}
if (buffer.ReadBool())
{
stream.ChannelCount += 2;
}
buffer.BSSkipBits(49);
var peakBitrate = buffer.ReadBits4(15);
peakBitrate = (uint)((peakBitrate * stream.SampleRate) >> 4);
var peakBitdepth = (double)peakBitrate / (stream.ChannelCount + stream.LFE) / stream.SampleRate;
stream.BitDepth = peakBitdepth > 14 ? 24 : 16;
buffer.BSSkipBits(79);
var hasExtensions = buffer.ReadBool();
var numExtensions = buffer.ReadBits2(4) * 2 + 1;
var hasContent = Convert.ToBoolean(buffer.ReadBits4(4));
if (hasExtensions)
{
for (var idx = 0; idx < numExtensions; ++idx)
{
if (Convert.ToBoolean(buffer.ReadBits2(8)))
{
hasContent = true;
}
}
if (hasContent)
{
stream.HasExtensions = true;
}
}
#if DEBUG
Debug.WriteLine($"{stream.PID}\t{peakBitrate}\t{peakBitdepth:F2}");
#endif
/*
* // TODO: Get THD dialnorm from metadata
* if (stream.CoreStream != null)
* {
* TSAudioStream coreStream = (TSAudioStream)stream.CoreStream;
* if (coreStream.DialNorm != 0)
* {
* stream.DialNorm = coreStream.DialNorm;
* }
* }
*/
stream.IsVBR = true;
if (stream.CoreStream != null && stream.CoreStream.IsInitialized)
{
stream.IsInitialized = true;
}
}
public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
uint parse = 0;
byte accessUnitDelimiterParse = 0;
byte sequenceParameterSetParse = 0;
string profile = null;
string level = null;
byte constraintSet0Flag = 0;
byte constraintSet1Flag = 0;
byte constraintSet2Flag = 0;
byte constraintSet3Flag = 0;
for (int i = 0; i < buffer.Length; i++)
{
parse = (parse << 8) + buffer.ReadByte();
if (parse == 0x00000109)
{
accessUnitDelimiterParse = 1;
}
else if (accessUnitDelimiterParse > 0)
{
--accessUnitDelimiterParse;
if (accessUnitDelimiterParse == 0)
{
switch ((parse & 0xFF) >> 5)
{
case 0: // I
case 3: // SI
case 5: // I, SI
tag = "I";
break;
case 1: // I, P
case 4: // SI, SP
case 6: // I, SI, P, SP
tag = "P";
break;
case 2: // I, P, B
case 7: // I, SI, P, SP, B
tag = "B";
break;
}
if (stream.IsInitialized)
{
return;
}
}
}
else if (parse == 0x00000127 || parse == 0x00000167)
{
sequenceParameterSetParse = 3;
}
else if (sequenceParameterSetParse > 0)
{
--sequenceParameterSetParse;
switch (sequenceParameterSetParse)
{
case 2:
switch (parse & 0xFF)
{
case 66:
profile = "Baseline Profile";
break;
case 77:
profile = "Main Profile";
break;
case 88:
profile = "Extended Profile";
break;
case 100:
profile = "High Profile";
break;
case 110:
profile = "High 10 Profile";
break;
case 122:
profile = "High 4:2:2 Profile";
break;
case 144:
profile = "High 4:4:4 Profile";
break;
default:
profile = "Unknown Profile";
break;
}
break;
case 1:
constraintSet0Flag = (byte)
((parse & 0x80) >> 7);
constraintSet1Flag = (byte)
((parse & 0x40) >> 6);
constraintSet2Flag = (byte)
((parse & 0x20) >> 5);
constraintSet3Flag = (byte)
((parse & 0x10) >> 4);
break;
case 0:
byte b = (byte)(parse & 0xFF);
if (b == 11 && constraintSet3Flag == 1)
{
level = "1b";
}
else
{
level = string.Format(
"{0:D}.{1:D}",
b / 10, (b - ((b / 10) * 10)));
}
stream.EncodingProfile = string.Format(
"{0} {1}", profile, level);
stream.IsVBR = true;
stream.IsInitialized = true;
break;
}
}
}
return;
}
public static void Scan(TSAudioStream stream, TSStreamBuffer buffer, ref string tag)
{
if (stream.IsInitialized)
{
return;
}
byte[] sync = buffer.ReadBytes(2);
if (sync == null || sync[0] != 0x0B || sync[1] != 0x77)
{
return;
}
var secondFrame = stream.ChannelCount > 0;
uint srCode;
uint frameSize = 0;
uint frameSizeCode = 0;
uint channelMode;
uint lfeOn;
uint dialNorm;
uint numBlocks = 0;
byte[] hdr = buffer.ReadBytes(4);
uint bsid = (uint)((hdr[3] & 0xF8) >> 3);
buffer.Seek(-4, SeekOrigin.Current);
if (bsid <= 10)
{
buffer.BSSkipBytes(2);
srCode = buffer.ReadBits2(2);
frameSizeCode = buffer.ReadBits2(6);
bsid = buffer.ReadBits2(5);
buffer.BSSkipBits(3);
channelMode = buffer.ReadBits2(3);
if (((channelMode & 0x1) > 0) && (channelMode != 0x1))
{
buffer.BSSkipBits(2);
}
if ((channelMode & 0x4) > 0)
{
buffer.BSSkipBits(2);
}
if (channelMode == 0x2)
{
var dsurmod = buffer.ReadBits2(2);
if (dsurmod == 0x2)
{
stream.AudioMode = TSAudioMode.Surround;
}
}
lfeOn = buffer.ReadBits2(1);
dialNorm = buffer.ReadBits2(5);
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
if (buffer.ReadBool())
{
buffer.BSSkipBits(7);
}
if (channelMode == 0)
{
buffer.BSSkipBits(5);
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
if (buffer.ReadBool())
{
buffer.BSSkipBits(7);
}
}
buffer.BSSkipBits(2);
if (bsid == 6)
{
if (buffer.ReadBool())
{
buffer.BSSkipBits(14);
}
if (buffer.ReadBool())
{
uint dsurexmod = buffer.ReadBits2(2);
uint dheadphonmod = buffer.ReadBits2(2);
if (dheadphonmod == 0x2)
{
// TODO
}
buffer.BSSkipBits(10);
if (dsurexmod == 2)
{
stream.AudioMode = TSAudioMode.Extended;
}
}
}
}
else
{
uint frameType = buffer.ReadBits2(2);
buffer.BSSkipBits(3);
frameSize = (buffer.ReadBits4(11) + 1) << 1;
srCode = buffer.ReadBits2(2);
if (srCode == 3)
{
srCode = buffer.ReadBits2(2);
numBlocks = 3;
}
else
{
numBlocks = buffer.ReadBits2(2);
}
channelMode = buffer.ReadBits2(3);
lfeOn = buffer.ReadBits2(1);
bsid = buffer.ReadBits2(5);
dialNorm = buffer.ReadBits2(5);
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
if (channelMode == 0) // 1+1
{
buffer.BSSkipBits(5);
if (buffer.ReadBool())
{
buffer.BSSkipBits(8);
}
}
if (frameType == 1) //dependent stream
{
stream.CoreStream = (TSAudioStream)stream.Clone();
if (buffer.ReadBool()) //channel remapping
{
uint chanmap = buffer.ReadBits4(16);
stream.ChannelCount = stream.CoreStream.ChannelCount;
stream.ChannelCount += AC3ChanMap((int)chanmap);
lfeOn = (uint)stream.CoreStream.LFE;
}
}
bool emdfFound = false;
do
{
uint emdfSync = (buffer.ReadBits4(16));
if ((emdfSync) == 0x5838)
{
emdfFound = true;
break;
}
buffer.Seek(-2, SeekOrigin.Current);
buffer.BSSkipBits(1); // skip 1 bit
} while (buffer.Position < buffer.Length);
if (emdfFound)
{
uint emdfContainerSize = buffer.ReadBits4(16);
var remainAfterEmdf = buffer.DataBitStreamRemain() - emdfContainerSize * 8;
uint emdfVersion = buffer.ReadBits2(2); //emdf_version
if (emdfVersion == 3)
{
emdfVersion += buffer.ReadBits2(2);
}
if (emdfVersion > 0)
{
buffer.BSSkipBits((int)(buffer.DataBitStreamRemain() - remainAfterEmdf));
}
else
{
var temp = buffer.ReadBits2(3);
if (temp == 0x7)
{
buffer.BSSkipBits(2); //skip 3 bits
}
var emdfPayloadID = buffer.ReadBits2(5);
if (emdfPayloadID > 0 && emdfPayloadID < 16)
{
if (emdfPayloadID == 0x1F)
{
buffer.BSSkipBits(5); //skip 5 bits
}
EmdfPayloadConfig(buffer);
int emdfPayloadSize = buffer.ReadBits2(8) * 8;
buffer.BSSkipBits(emdfPayloadSize + 1);
}
while ((emdfPayloadID = buffer.ReadBits2(5)) != 14 && buffer.Position < buffer.Length)
{
if (emdfPayloadID == 0x1F)
{
buffer.BSSkipBits(5); //skip 5 bits
}
EmdfPayloadConfig(buffer);
int emdfPayloadSize = buffer.ReadBits2(8) * 8;
buffer.ReadBits4(emdfPayloadSize + 1);
}
if (buffer.Position < buffer.Length && emdfPayloadID == 14)
{
EmdfPayloadConfig(buffer);
buffer.BSSkipBits(12);
uint jocNumObjectsBits = buffer.ReadBits2(6);
if (jocNumObjectsBits > 0)
{
stream.HasExtensions = true;
}
}
}
}
}
if ((channelMode < 8) && stream.ChannelCount == 0)
{
stream.ChannelCount = AC3Channels[channelMode];
}
if (stream.AudioMode == TSAudioMode.Unknown)
{
switch (channelMode)
{
case 0: // 1+1
stream.AudioMode = TSAudioMode.DualMono;
break;
case 2: // 2/0
stream.AudioMode = TSAudioMode.Stereo;
break;
default:
stream.AudioMode = TSAudioMode.Unknown;
break;
}
}
switch (srCode)
{
case 0:
stream.SampleRate = 48000;
break;
case 1:
stream.SampleRate = 44100;
break;
case 2:
stream.SampleRate = 32000;
break;
default:
stream.SampleRate = 0;
break;
}
if (bsid <= 10)
{
uint fSize = frameSizeCode >> 1;
if (fSize < 19)
{
stream.BitRate = AC3Bitrate[fSize] * 1000;
}
}
else
{
stream.BitRate = (long)
(4.0 * frameSize * stream.SampleRate / (numBlocks * 256));
if (stream.CoreStream != null)
{
stream.BitRate += stream.CoreStream.BitRate;
}
}
stream.LFE = (int)lfeOn;
if (stream.StreamType != TSStreamType.AC3_PLUS_AUDIO &&
stream.StreamType != TSStreamType.AC3_PLUS_SECONDARY_AUDIO)
{
stream.DialNorm = (int)(dialNorm - 31);
}
stream.IsVBR = false;
if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && bsid == 6 && !secondFrame)
{
stream.IsInitialized = false;
}
else
{
stream.IsInitialized = true;
}
}
public static void Scan(
TSVideoStream stream,
TSStreamBuffer buffer,
ref string tag)
{
int parse = 0;
byte frameHeaderParse = 0;
byte sequenceHeaderParse = 0;
bool isInterlaced = false;
for (int i = 0; i < buffer.Length; i++)
{
parse = (parse << 8) + buffer.ReadByte();
if (parse == 0x0000010D)
{
frameHeaderParse = 4;
}
else if (frameHeaderParse > 0)
{
--frameHeaderParse;
if (frameHeaderParse == 0)
{
uint pictureType = 0;
if (isInterlaced)
{
if ((parse & 0x80000000) == 0)
{
pictureType =
(uint)((parse & 0x78000000) >> 13);
}
else
{
pictureType =
(uint)((parse & 0x3c000000) >> 12);
}
}
else
{
pictureType =
(uint)((parse & 0xf0000000) >> 14);
}
if ((pictureType & 0x20000) == 0)
{
tag = "P";
}
else if ((pictureType & 0x10000) == 0)
{
tag = "B";
}
else if ((pictureType & 0x8000) == 0)
{
tag = "I";
}
else if ((pictureType & 0x4000) == 0)
{
tag = "BI";
}
else
{
tag = null;
}
if (stream.IsInitialized)
{
return;
}
}
}
else if (parse == 0x0000010F)
{
sequenceHeaderParse = 6;
}
else if (sequenceHeaderParse > 0)
{
--sequenceHeaderParse;
switch (sequenceHeaderParse)
{
case 5:
int profileLevel = ((parse & 0x38) >> 3);
if (((parse & 0xC0) >> 6) == 3)
{
stream.EncodingProfile = string.Format(
"Advanced Profile {0}", profileLevel);
}
else
{
stream.EncodingProfile = string.Format(
"Main Profile {0}", profileLevel);
}
break;
case 0:
if (((parse & 0x40) >> 6) > 0)
{
isInterlaced = true;
}
else
{
isInterlaced = false;
}
break;
}
stream.IsVBR = true;
stream.IsInitialized = true;
}
}
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized &&
stream.CoreStream != null &&
stream.CoreStream.IsInitialized)
{
return;
}
bool syncFound = false;
uint sync = 0;
for (int i = 0; i < buffer.Length; i++)
{
sync = (sync << 8) + buffer.ReadByte();
if (sync == 0xF8726FBA)
{
syncFound = true;
break;
}
}
if (!syncFound)
{
tag = "CORE";
if (stream.CoreStream == null)
{
stream.CoreStream = new TSAudioStream();
stream.CoreStream.StreamType = TSStreamType.AC3_AUDIO;
}
if (!stream.CoreStream.IsInitialized)
{
buffer.BeginRead();
TSCodecAC3.Scan(stream.CoreStream, buffer, ref tag);
}
return;
}
tag = "HD";
int ratebits = buffer.ReadBits(4);
if (ratebits != 0xF)
{
stream.SampleRate =
(((ratebits & 8) > 0 ? 44100 : 48000) << (ratebits & 7));
}
int temp1 = buffer.ReadBits(8);
int channels_thd_stream1 = buffer.ReadBits(5);
int temp2 = buffer.ReadBits(2);
stream.ChannelCount = 0;
stream.LFE = 0;
int c_LFE2 = buffer.ReadBits(1);
if (c_LFE2 == 1)
{
stream.LFE += 1;
}
int c_Cvh = buffer.ReadBits(1);
if (c_Cvh == 1)
{
stream.ChannelCount += 1;
}
int c_LRw = buffer.ReadBits(1);
if (c_LRw == 1)
{
stream.ChannelCount += 2;
}
int c_LRsd = buffer.ReadBits(1);
if (c_LRsd == 1)
{
stream.ChannelCount += 2;
}
int c_Ts = buffer.ReadBits(1);
if (c_Ts == 1)
{
stream.ChannelCount += 1;
}
int c_Cs = buffer.ReadBits(1);
if (c_Cs == 1)
{
stream.ChannelCount += 1;
}
int c_LRrs = buffer.ReadBits(1);
if (c_LRrs == 1)
{
stream.ChannelCount += 2;
}
int c_LRc = buffer.ReadBits(1);
if (c_LRc == 1)
{
stream.ChannelCount += 2;
}
int c_LRvh = buffer.ReadBits(1);
if (c_LRvh == 1)
{
stream.ChannelCount += 2;
}
int c_LRs = buffer.ReadBits(1);
if (c_LRs == 1)
{
stream.ChannelCount += 2;
}
int c_LFE = buffer.ReadBits(1);
if (c_LFE == 1)
{
stream.LFE += 1;
}
int c_C = buffer.ReadBits(1);
if (c_C == 1)
{
stream.ChannelCount += 1;
}
int c_LR = buffer.ReadBits(1);
if (c_LR == 1)
{
stream.ChannelCount += 2;
}
int access_unit_size = 40 << (ratebits & 7);
int access_unit_size_pow2 = 64 << (ratebits & 7);
int a1 = buffer.ReadBits(16);
int a2 = buffer.ReadBits(16);
int a3 = buffer.ReadBits(16);
int is_vbr = buffer.ReadBits(1);
int peak_bitrate = buffer.ReadBits(15);
peak_bitrate = (peak_bitrate * stream.SampleRate) >> 4;
double peak_bitdepth =
(double)peak_bitrate /
(stream.ChannelCount + stream.LFE) /
stream.SampleRate;
if (peak_bitdepth > 14)
{
stream.BitDepth = 24;
}
else
{
stream.BitDepth = 16;
}
#if DEBUG
System.Diagnostics.Debug.WriteLine(string.Format(
"{0}\t{1}\t{2:F2}",
stream.PID, peak_bitrate, peak_bitdepth));
#endif
/*
* // TODO: Get THD dialnorm from metadata
* if (stream.CoreStream != null)
* {
* TSAudioStream coreStream = (TSAudioStream)stream.CoreStream;
* if (coreStream.DialNorm != 0)
* {
* stream.DialNorm = coreStream.DialNorm;
* }
* }
*/
stream.IsVBR = true;
stream.IsInitialized = true;
}
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized)
{
return;
}
byte[] sync = buffer.ReadBytes(2);
if (sync == null ||
sync[0] != 0x0B ||
sync[1] != 0x77)
{
return;
}
int sr_code = 0;
int frame_size = 0;
int frame_size_code = 0;
int channel_mode = 0;
int lfe_on = 0;
int dial_norm = 0;
int num_blocks = 0;
byte[] hdr = buffer.ReadBytes(4);
int bsid = (hdr[3] & 0xF8) >> 3;
buffer.Seek(-4, SeekOrigin.Current);
if (bsid <= 10)
{
byte[] crc = buffer.ReadBytes(2);
sr_code = buffer.ReadBits(2);
frame_size_code = buffer.ReadBits(6);
bsid = buffer.ReadBits(5);
int bsmod = buffer.ReadBits(3);
channel_mode = buffer.ReadBits(3);
int cmixlev = 0;
if (((channel_mode & 0x1) > 0) && (channel_mode != 0x1))
{
cmixlev = buffer.ReadBits(2);
}
int surmixlev = 0;
if ((channel_mode & 0x4) > 0)
{
surmixlev = buffer.ReadBits(2);
}
int dsurmod = 0;
if (channel_mode == 0x2)
{
dsurmod = buffer.ReadBits(2);
if (dsurmod == 0x2)
{
stream.AudioMode = TSAudioMode.Surround;
}
}
lfe_on = buffer.ReadBits(1);
dial_norm = buffer.ReadBits(5);
int compr = 0;
if (1 == buffer.ReadBits(1))
{
compr = buffer.ReadBits(8);
}
int langcod = 0;
if (1 == buffer.ReadBits(1))
{
langcod = buffer.ReadBits(8);
}
int mixlevel = 0;
int roomtyp = 0;
if (1 == buffer.ReadBits(1))
{
mixlevel = buffer.ReadBits(5);
roomtyp = buffer.ReadBits(2);
}
if (channel_mode == 0)
{
int dialnorm2 = buffer.ReadBits(5);
int compr2 = 0;
if (1 == buffer.ReadBits(1))
{
compr2 = buffer.ReadBits(8);
}
int langcod2 = 0;
if (1 == buffer.ReadBits(1))
{
langcod2 = buffer.ReadBits(8);
}
int mixlevel2 = 0;
int roomtyp2 = 0;
if (1 == buffer.ReadBits(1))
{
mixlevel2 = buffer.ReadBits(5);
roomtyp2 = buffer.ReadBits(2);
}
}
int copyrightb = buffer.ReadBits(1);
int origbs = buffer.ReadBits(1);
if (bsid == 6)
{
if (1 == buffer.ReadBits(1))
{
int dmixmod = buffer.ReadBits(2);
int ltrtcmixlev = buffer.ReadBits(3);
int ltrtsurmixlev = buffer.ReadBits(3);
int lorocmixlev = buffer.ReadBits(3);
int lorosurmixlev = buffer.ReadBits(3);
}
if (1 == buffer.ReadBits(1))
{
int dsurexmod = buffer.ReadBits(2);
int dheadphonmod = buffer.ReadBits(2);
if (dheadphonmod == 0x2)
{
// TODO
}
int adconvtyp = buffer.ReadBits(1);
int xbsi2 = buffer.ReadBits(8);
int encinfo = buffer.ReadBits(1);
if (dsurexmod == 2)
{
stream.AudioMode = TSAudioMode.Extended;
}
}
}
}
else
{
int frame_type = buffer.ReadBits(2);
int substreamid = buffer.ReadBits(3);
frame_size = (buffer.ReadBits(11) + 1) << 1;
sr_code = buffer.ReadBits(2);
if (sr_code == 3)
{
sr_code = buffer.ReadBits(2);
}
else
{
num_blocks = buffer.ReadBits(2);
}
channel_mode = buffer.ReadBits(3);
lfe_on = buffer.ReadBits(1);
}
switch (channel_mode)
{
case 0: // 1+1
stream.ChannelCount = 2;
if (stream.AudioMode == TSAudioMode.Unknown)
{
stream.AudioMode = TSAudioMode.DualMono;
}
break;
case 1: // 1/0
stream.ChannelCount = 1;
break;
case 2: // 2/0
stream.ChannelCount = 2;
if (stream.AudioMode == TSAudioMode.Unknown)
{
stream.AudioMode = TSAudioMode.Stereo;
}
break;
case 3: // 3/0
stream.ChannelCount = 3;
break;
case 4: // 2/1
stream.ChannelCount = 3;
break;
case 5: // 3/1
stream.ChannelCount = 4;
break;
case 6: // 2/2
stream.ChannelCount = 4;
break;
case 7: // 3/2
stream.ChannelCount = 5;
break;
default:
stream.ChannelCount = 0;
break;
}
switch (sr_code)
{
case 0:
stream.SampleRate = 48000;
break;
case 1:
stream.SampleRate = 44100;
break;
case 2:
stream.SampleRate = 32000;
break;
default:
stream.SampleRate = 0;
break;
}
if (bsid <= 10)
{
switch (frame_size_code >> 1)
{
case 18:
stream.BitRate = 640000;
break;
case 17:
stream.BitRate = 576000;
break;
case 16:
stream.BitRate = 512000;
break;
case 15:
stream.BitRate = 448000;
break;
case 14:
stream.BitRate = 384000;
break;
case 13:
stream.BitRate = 320000;
break;
case 12:
stream.BitRate = 256000;
break;
case 11:
stream.BitRate = 224000;
break;
case 10:
stream.BitRate = 192000;
break;
case 9:
stream.BitRate = 160000;
break;
case 8:
stream.BitRate = 128000;
break;
case 7:
stream.BitRate = 112000;
break;
case 6:
stream.BitRate = 96000;
break;
case 5:
stream.BitRate = 80000;
break;
case 4:
stream.BitRate = 64000;
break;
case 3:
stream.BitRate = 56000;
break;
case 2:
stream.BitRate = 48000;
break;
case 1:
stream.BitRate = 40000;
break;
case 0:
stream.BitRate = 32000;
break;
default:
stream.BitRate = 0;
break;
}
}
else
{
stream.BitRate = (long)
(4.0 * frame_size * stream.SampleRate / (num_blocks * 256));
}
stream.LFE = lfe_on;
if (stream.StreamType != TSStreamType.AC3_PLUS_AUDIO &&
stream.StreamType != TSStreamType.AC3_PLUS_SECONDARY_AUDIO)
{
stream.DialNorm = dial_norm - 31;
}
stream.IsVBR = false;
stream.IsInitialized = true;
}
