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;
}
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> 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();
}
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
if (allocation != 0)
{
sample = sample * factor + offset; // requantization
if (channels == OutputChannels.BOTH_CHANNELS)
{
float sample1 = sample * scalefactor, sample2 = sample * channel2_scalefactor;
filter1.input_sample(sample1, subbandnumber);
filter2.input_sample(sample2, subbandnumber);
}
else if (channels == OutputChannels.LEFT_CHANNEL)
{
float sample1 = sample * scalefactor;
filter1.input_sample(sample1, subbandnumber);
}
else
{
float sample2 = sample * channel2_scalefactor;
filter1.input_sample(sample2, subbandnumber);
}
}
return true;
}
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
base.put_next_sample(channels, filter1, filter2);
if ((channel2_allocation != 0) && (channels != OutputChannels.LEFT_CHANNEL))
{
float sample2 = (channel2_sample * channel2_factor + channel2_offset) * channel2_scalefactor;
if (channels == OutputChannels.BOTH_CHANNELS)
filter2.input_sample(sample2, subbandnumber);
else
filter1.input_sample(sample2, subbandnumber);
}
return true;
}
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
if ((allocation != 0) && (channels != OutputChannels.RIGHT_CHANNEL))
{
float scaled_sample = (sample * factor + offset) * scalefactor;
filter1.input_sample(scaled_sample, subbandnumber);
}
return true;
}
public abstract bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2);
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
bool returnvalue = base.put_next_sample(channels, filter1, filter2);
if ((channel2_allocation != 0) && (channels != OutputChannels.LEFT_CHANNEL))
{
float sample = channel2_samples[samplenumber - 1];
if (groupingtable[1] == null)
sample = (sample + channel2_d[0]) * channel2_c[0];
if (groupnumber <= 4)
sample *= channel2_scalefactor1;
else if (groupnumber <= 8)
sample *= channel2_scalefactor2;
else
sample *= channel2_scalefactor3;
if (channels == OutputChannels.BOTH_CHANNELS)
filter2.input_sample(sample, subbandnumber);
else
filter1.input_sample(sample, subbandnumber);
}
return returnvalue;
}
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
if (allocation != 0)
{
float sample = samples[samplenumber];
if (groupingtable[0] == null)
sample = (sample + d[0]) * c[0];
if (channels == OutputChannels.BOTH_CHANNELS)
{
float sample2 = sample;
if (groupnumber <= 4)
{
sample *= scalefactor1;
sample2 *= channel2_scalefactor1;
}
else if (groupnumber <= 8)
{
sample *= scalefactor2;
sample2 *= channel2_scalefactor2;
}
else
{
sample *= scalefactor3;
sample2 *= channel2_scalefactor3;
}
filter1.input_sample(sample, subbandnumber);
filter2.input_sample(sample2, subbandnumber);
}
else if (channels == OutputChannels.LEFT_CHANNEL)
{
if (groupnumber <= 4)
sample *= scalefactor1;
else if (groupnumber <= 8)
sample *= scalefactor2;
else
sample *= scalefactor3;
filter1.input_sample(sample, subbandnumber);
}
else
{
if (groupnumber <= 4)
sample *= channel2_scalefactor1;
else if (groupnumber <= 8)
sample *= channel2_scalefactor2;
else
sample *= channel2_scalefactor3;
filter1.input_sample(sample, subbandnumber);
}
}
if (++samplenumber == 3)
return true;
else
return false;
}
/// <summary>*
/// </summary>
public override bool put_next_sample(int channels, SynthesisFilter filter1, SynthesisFilter filter2)
{
if ((allocation != 0) && (channels != OutputChannels.RIGHT_CHANNEL))
{
float sample = samples[samplenumber];
if (groupingtable[0] == null)
sample = (sample + d[0]) * c[0];
if (groupnumber <= 4)
sample *= scalefactor1;
else if (groupnumber <= 8)
sample *= scalefactor2;
else
sample *= scalefactor3;
filter1.input_sample(sample, subbandnumber);
}
if (++samplenumber == 3)
return true;
else
return false;
}
