| public Seek ( long offset, SeekOrigin loc ) : void | ||
| offset | long | |
| loc | SeekOrigin | |
| return | void | |
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 void Scan(TSAudioStream stream, TSStreamBuffer buffer, ref string tag, long?bitrate)
{
if (stream.IsInitialized)
{
return;
}
var 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 = 0;
uint dialNormExt = 0;
uint numBlocks = 0;
var hdr = buffer.ReadBytes(4);
var 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);
dialNormExt = 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();
stream.CoreStream.StreamType = TSStreamType.AC3_AUDIO;
if (buffer.ReadBool()) //channel remapping
{
var chanmap = buffer.ReadBits4(16);
stream.ChannelCount = stream.CoreStream.ChannelCount;
stream.ChannelCount += AC3ChanMap((int)chanmap);
lfeOn = (uint)stream.CoreStream.LFE;
}
}
var emdfFound = false;
do
{
var 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)
{
var 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);
var 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);
var 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)
{
var 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_SECONDARY_AUDIO)
{
if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && bsid == 6 || stream.StreamType == TSStreamType.AC3_AUDIO)
{
stream.DialNorm = (int)dialNorm * -1;
}
else if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && secondFrame)
{
stream.DialNorm = (int)dialNormExt * -1;
}
}
stream.IsVBR = false;
if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && bsid == 6 && !secondFrame)
{
stream.IsInitialized = false;
}
else
{
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;
}
