public virtual void create(Bitstream stream0, Header header0, SynthesisFilter filtera, SynthesisFilter filterb, Obuffer buffer0, int which_ch0)
{
stream = stream0;
header = header0;
filter1 = filtera;
filter2 = filterb;
buffer = buffer0;
which_channels = which_ch0;
}
/// <summary>*
/// </summary>
public override void read_scalefactor(Bitstream stream, Header header)
{
if (allocation != 0)
scalefactor = scalefactors[stream.get_bits(6)];
if (channel2_allocation != 0)
channel2_scalefactor = scalefactors[stream.get_bits(6)];
}
/// <summary>*
/// </summary>
public override void read_allocation(Bitstream stream, Header header, Crc16 crc)
{
allocation = stream.get_bits(4);
channel2_allocation = stream.get_bits(4);
// try/catch block to handle invalid allocation
// (catch array bounds error)
try
{
if (crc != null)
{
crc.add_bits(allocation, 4);
crc.add_bits(channel2_allocation, 4);
}
if (allocation != 0)
{
samplelength = allocation + 1;
factor = table_factor[allocation];
offset = table_offset[allocation];
}
if (channel2_allocation != 0)
{
channel2_samplelength = channel2_allocation + 1;
channel2_factor = table_factor[channel2_allocation];
channel2_offset = table_offset[channel2_allocation];
}
}
catch (IndexOutOfRangeException )
{
// array bounds error? Invalid allocation
// (or unsupported). Ignore for now.
}
}
/// <summary>*
/// </summary>
public override void read_allocation(Bitstream stream, Header header, Crc16 crc)
{
base.read_allocation(stream, header, crc);
}
/// <summary>*
/// </summary>
public override void read_allocation(Bitstream stream, Header header, Crc16 crc)
{
if ((allocation = stream.get_bits(4)) == 15)
{
}
// cerr << "WARNING: stream contains an illegal allocation!\n";
// MPEG-stream is corrupted!
if (crc != null)
crc.add_bits(allocation, 4);
if (allocation != 0)
{
samplelength = allocation + 1;
factor = table_factor[allocation];
offset = table_offset[allocation];
}
}
public virtual void decodedFrame(int frameNo, Header header, Obuffer o)
{
if (isDetail(MAX_DETAIL))
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.Object.toString' may return a different value. 'ms-help://MS.VSCC.2003/commoner/redir/redirect.htm?keyword="jlca1043"'
System.String headerString = header.ToString();
pw.WriteLine("Decoded frame " + frameNo + ": " + headerString);
pw.WriteLine("Output: " + o);
}
else if (isDetail(VERBOSE_DETAIL))
{
if (frameNo == 0)
{
pw.Write("Converting.");
pw.Flush();
}
if ((frameNo % 10) == 0)
{
pw.Write('.');
pw.Flush();
}
}
}
protected internal virtual FrameDecoder retrieveDecoder(Header header, Bitstream stream, int layer)
{
FrameDecoder decoder = null;
// REVIEW: allow channel output selection type
// (LEFT, RIGHT, BOTH, DOWNMIX)
switch (layer)
{
case 3:
if (l3decoder == null)
{
l3decoder = new LayerIIIDecoder(stream, header, filter1, filter2, output, (int)OutputChannelsEnum.BOTH_CHANNELS);
}
decoder = l3decoder;
break;
case 2:
if (l2decoder == null)
{
l2decoder = new LayerIIDecoder();
l2decoder.create(stream, header, filter1, filter2, output, (int)OutputChannelsEnum.BOTH_CHANNELS);
}
decoder = l2decoder;
break;
case 1:
if (l1decoder == null)
{
l1decoder = new LayerIDecoder();
l1decoder.create(stream, header, filter1, filter2, output, (int)OutputChannelsEnum.BOTH_CHANNELS);
}
decoder = l1decoder;
break;
}
if (decoder == null)
{
throw newDecoderException(javazoom.jl.decoder.DecoderErrors_Fields.UNSUPPORTED_LAYER, null);
}
return decoder;
}
private void InitBlock()
{
crc = new Crc16[1];
syncbuf = new sbyte[4];
frame_bytes = new sbyte[BUFFER_INT_SIZE * 4];
framebuffer = new int[BUFFER_INT_SIZE];
header = new Header();
}
/// <summary>*
/// </summary>
public override void read_allocation(Bitstream stream, Header header, Crc16 crc)
{
int length = get_allocationlength(header);
allocation = stream.get_bits(length);
channel2_allocation = stream.get_bits(length);
if (crc != null)
{
crc.add_bits(allocation, length);
crc.add_bits(channel2_allocation, length);
}
}
/// <summary>*
/// </summary>
public override void read_scalefactor(Bitstream stream, Header header)
{
if (allocation != 0)
{
base.read_scalefactor(stream, header);
switch (channel2_scfsi)
{
case 0:
channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 1:
channel2_scalefactor1 = channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 2:
channel2_scalefactor1 = channel2_scalefactor2 = channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 3:
channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
channel2_scalefactor2 = channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
}
}
}
/// <summary>*
/// </summary>
protected internal virtual void prepare_sample_reading(Header header, int allocation, int channel, float[] factor, int[] codelength, float[] c, float[] d)
{
int channel_bitrate = header.bitrate_index();
// calculate bitrate per channel:
if (header.mode() != Header.SINGLE_CHANNEL)
if (channel_bitrate == 4)
channel_bitrate = 1;
else
channel_bitrate -= 4;
if (channel_bitrate == 1 || channel_bitrate == 2)
{
// table 3-B.2c or 3-B.2d
groupingtable[channel] = table_cd_groupingtables[allocation];
factor[0] = table_cd_factor[allocation];
codelength[0] = table_cd_codelength[allocation];
c[0] = table_cd_c[allocation];
d[0] = table_cd_d[allocation];
}
else
{
// tables 3-B.2a or 3-B.2b
if (subbandnumber <= 2)
{
groupingtable[channel] = table_ab1_groupingtables[allocation];
factor[0] = table_ab1_factor[allocation];
codelength[0] = table_ab1_codelength[allocation];
c[0] = table_ab1_c[allocation];
d[0] = table_ab1_d[allocation];
}
else
{
groupingtable[channel] = table_ab234_groupingtables[allocation];
if (subbandnumber <= 10)
{
factor[0] = table_ab2_factor[allocation];
codelength[0] = table_ab2_codelength[allocation];
c[0] = table_ab2_c[allocation];
d[0] = table_ab2_d[allocation];
}
else if (subbandnumber <= 22)
{
factor[0] = table_ab3_factor[allocation];
codelength[0] = table_ab3_codelength[allocation];
c[0] = table_ab3_c[allocation];
d[0] = table_ab3_d[allocation];
}
else
{
factor[0] = table_ab4_factor[allocation];
codelength[0] = table_ab4_codelength[allocation];
c[0] = table_ab4_c[allocation];
d[0] = table_ab4_d[allocation];
}
}
}
}
/// <summary>*
/// </summary>
protected internal virtual int get_allocationlength(Header header)
{
if (header.version() == Header.MPEG1)
{
int channel_bitrate = header.bitrate_index();
// calculate bitrate per channel:
if (header.mode() != Header.SINGLE_CHANNEL)
if (channel_bitrate == 4)
channel_bitrate = 1;
else
channel_bitrate -= 4;
if (channel_bitrate == 1 || channel_bitrate == 2)
// table 3-B.2c or 3-B.2d
if (subbandnumber <= 1)
return 4;
else
return 3;
// tables 3-B.2a or 3-B.2b
else if (subbandnumber <= 10)
return 4;
else if (subbandnumber <= 22)
return 3;
else
return 2;
}
else
{
// MPEG-2 LSF -- Jeff
// table B.1 of ISO/IEC 13818-3
if (subbandnumber <= 3)
return 4;
else if (subbandnumber <= 10)
return 3;
else
return 2;
}
}
/// <summary>*
/// </summary>
public override void read_scalefactor(Bitstream stream, Header header)
{
if (allocation != 0)
{
switch (scfsi)
{
case 0:
scalefactor1 = scalefactors[stream.get_bits(6)];
scalefactor2 = scalefactors[stream.get_bits(6)];
scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 1:
scalefactor1 = scalefactor2 = scalefactors[stream.get_bits(6)];
scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 2:
scalefactor1 = scalefactor2 = scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 3:
scalefactor1 = scalefactors[stream.get_bits(6)];
scalefactor2 = scalefactor3 = scalefactors[stream.get_bits(6)];
break;
}
prepare_sample_reading(header, allocation, 0, factor, codelength, c, d);
}
}
public virtual void readFrame(int frameNo, Header header)
{
if ((frameNo == 0) && isDetail(VERBOSE_DETAIL))
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.Object.toString' may return a different value. 'ms-help://MS.VSCC.2003/commoner/redir/redirect.htm?keyword="jlca1043"'
System.String headerString = header.ToString();
pw.WriteLine("File is a " + headerString);
}
else if (isDetail(MAX_DETAIL))
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.Object.toString' may return a different value. 'ms-help://MS.VSCC.2003/commoner/redir/redirect.htm?keyword="jlca1043"'
System.String headerString = header.ToString();
pw.WriteLine("Read frame " + frameNo + ": " + headerString);
}
}
/// <summary>*
/// </summary>
public override void read_scalefactor(Bitstream stream, Header header)
{
base.read_scalefactor(stream, header);
if (channel2_allocation != 0)
{
switch (channel2_scfsi)
{
case 0:
channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 1:
channel2_scalefactor1 = channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 2:
channel2_scalefactor1 = channel2_scalefactor2 = channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
case 3:
channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
channel2_scalefactor2 = channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
break;
}
prepare_sample_reading(header, channel2_allocation, 1, channel2_factor, channel2_codelength, channel2_c, channel2_d);
}
}
/// <summary> Constructor.
/// </summary>
// REVIEW: these constructor arguments should be moved to the
// decodeFrame() method, where possible, so that one
public LayerIIIDecoder(Bitstream stream0, Header header0, SynthesisFilter filtera, SynthesisFilter filterb, Obuffer buffer0, int which_ch0)
{
InitBlock();
huffcodetab.inithuff();
is_1d = new int[SBLIMIT * SSLIMIT + 4];
ro = new float[2][][];
for (int i = 0; i < 2; i++)
{
ro[i] = new float[SBLIMIT][];
for (int i2 = 0; i2 < SBLIMIT; i2++)
{
ro[i][i2] = new float[SSLIMIT];
}
}
lr = new float[2][][];
for (int i3 = 0; i3 < 2; i3++)
{
lr[i3] = new float[SBLIMIT][];
for (int i4 = 0; i4 < SBLIMIT; i4++)
{
lr[i3][i4] = new float[SSLIMIT];
}
}
out_1d = new float[SBLIMIT * SSLIMIT];
prevblck = new float[2][];
for (int i5 = 0; i5 < 2; i5++)
{
prevblck[i5] = new float[SBLIMIT * SSLIMIT];
}
k = new float[2][];
for (int i6 = 0; i6 < 2; i6++)
{
k[i6] = new float[SBLIMIT * SSLIMIT];
}
nonzero = new int[2];
//III_scalefact_t
III_scalefac_t = new temporaire2[2];
III_scalefac_t[0] = new temporaire2();
III_scalefac_t[1] = new temporaire2();
scalefac = III_scalefac_t;
// L3TABLE INIT
sfBandIndex = new SBI[9]; // SZD: MPEG2.5 +3 indices
int[] l0 = new int[]{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576};
int[] s0 = new int[]{0, 4, 8, 12, 18, 24, 32, 42, 56, 74, 100, 132, 174, 192};
int[] l1 = new int[]{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 114, 136, 162, 194, 232, 278, 330, 394, 464, 540, 576};
int[] s1 = new int[]{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 136, 180, 192};
int[] l2 = new int[]{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576};
int[] s2 = new int[]{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192};
int[] l3 = new int[]{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 52, 62, 74, 90, 110, 134, 162, 196, 238, 288, 342, 418, 576};
int[] s3 = new int[]{0, 4, 8, 12, 16, 22, 30, 40, 52, 66, 84, 106, 136, 192};
int[] l4 = new int[]{0, 4, 8, 12, 16, 20, 24, 30, 36, 42, 50, 60, 72, 88, 106, 128, 156, 190, 230, 276, 330, 384, 576};
int[] s4 = new int[]{0, 4, 8, 12, 16, 22, 28, 38, 50, 64, 80, 100, 126, 192};
int[] l5 = new int[]{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 54, 66, 82, 102, 126, 156, 194, 240, 296, 364, 448, 550, 576};
int[] s5 = new int[]{0, 4, 8, 12, 16, 22, 30, 42, 58, 78, 104, 138, 180, 192};
// SZD: MPEG2.5
int[] l6 = new int[]{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576};
int[] s6 = new int[]{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192};
int[] l7 = new int[]{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576};
int[] s7 = new int[]{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192};
int[] l8 = new int[]{0, 12, 24, 36, 48, 60, 72, 88, 108, 132, 160, 192, 232, 280, 336, 400, 476, 566, 568, 570, 572, 574, 576};
int[] s8 = new int[]{0, 8, 16, 24, 36, 52, 72, 96, 124, 160, 162, 164, 166, 192};
sfBandIndex[0] = new SBI(l0, s0);
sfBandIndex[1] = new SBI(l1, s1);
sfBandIndex[2] = new SBI(l2, s2);
sfBandIndex[3] = new SBI(l3, s3);
sfBandIndex[4] = new SBI(l4, s4);
sfBandIndex[5] = new SBI(l5, s5);
//SZD: MPEG2.5
sfBandIndex[6] = new SBI(l6, s6);
sfBandIndex[7] = new SBI(l7, s7);
sfBandIndex[8] = new SBI(l8, s8);
// END OF L3TABLE INIT
if (reorder_table == null)
{
// SZD: generate LUT
reorder_table = new int[9][];
for (int i = 0; i < 9; i++)
reorder_table[i] = reorder(sfBandIndex[i].s);
}
// Sftable
int[] ll0 = new int[]{0, 6, 11, 16, 21};
int[] ss0 = new int[]{0, 6, 12};
sftable = new Sftable(this, ll0, ss0);
// END OF Sftable
// scalefac_buffer
scalefac_buffer = new int[54];
// END OF scalefac_buffer
stream = stream0;
header = header0;
filter1 = filtera;
filter2 = filterb;
buffer = buffer0;
which_channels = which_ch0;
frame_start = 0;
channels = (header.mode() == Header.SINGLE_CHANNEL)?1:2;
max_gr = (header.version() == Header.MPEG1)?2:1;
sfreq = header.sample_frequency() + ((header.version() == Header.MPEG1)?3:(header.version() == Header.MPEG25_LSF)?6:0); // SZD
if (channels == 2)
{
switch (which_channels)
{
case (int)OutputChannelsEnum.LEFT_CHANNEL:
case (int)OutputChannelsEnum.DOWNMIX_CHANNELS:
first_channel = last_channel = 0;
break;
case (int)OutputChannelsEnum.RIGHT_CHANNEL:
first_channel = last_channel = 1;
break;
case (int)OutputChannelsEnum.BOTH_CHANNELS:
default:
first_channel = 0;
last_channel = 1;
break;
}
}
else
{
first_channel = last_channel = 0;
}
for (int ch = 0; ch < 2; ch++)
for (int j = 0; j < 576; j++)
prevblck[ch][j] = 0.0f;
nonzero[0] = nonzero[1] = 576;
br = new BitReserve();
si = new III_side_info_t();
}
public abstract void read_allocation(Bitstream stream, Header header, Crc16 crc);
/// <summary> Decodes one frame from an MPEG audio bitstream.
///
/// </summary>
/// <param name="header The">header describing the frame to decode.
/// </param>
/// <param name="bitstream The">bistream that provides the bits for te body of the frame.
///
/// </param>
/// <returns> A SampleBuffer containing the decoded samples.
///
/// </returns>
public virtual Obuffer decodeFrame(Header header, Bitstream stream)
{
if (!initialized)
{
initialize(header);
}
int layer = header.layer();
output.clear_buffer();
FrameDecoder decoder = retrieveDecoder(header, stream, layer);
decoder.decodeFrame();
output.write_buffer(1);
return output;
}
public abstract void read_scalefactor(Bitstream stream, Header header);
private void initialize(Header header)
{
// REVIEW: allow customizable scale factor
float scalefactor = 32700.0f;
int mode = header.mode();
int layer = header.layer();
int channels = mode == Header.SINGLE_CHANNEL?1:2;
// set up output buffer if not set up by client.
if (output == null)
output = new SampleBuffer(header.frequency(), channels);
float[] factors = equalizer.BandFactors;
//Console.WriteLine("NOT CREATING SYNTHESIS FILTERS");
filter1 = new SynthesisFilter(0, scalefactor, factors);
// REVIEW: allow mono output for stereo
if (channels == 2)
filter2 = new SynthesisFilter(1, scalefactor, factors);
outputChannels = channels;
outputFrequency = header.frequency();
initialized = true;
}
/// <summary>*
/// </summary>
public override void read_allocation(Bitstream stream, Header header, Crc16 crc)
{
allocation = stream.get_bits(4);
channel2_allocation = stream.get_bits(4);
if (crc != null)
{
crc.add_bits(allocation, 4);
crc.add_bits(channel2_allocation, 4);
}
if (allocation != 0)
{
samplelength = allocation + 1;
factor = table_factor[allocation];
offset = table_offset[allocation];
}
if (channel2_allocation != 0)
{
channel2_samplelength = channel2_allocation + 1;
channel2_factor = table_factor[channel2_allocation];
channel2_offset = table_offset[channel2_allocation];
}
}
