public void iteration_loop(LameGlobalFlags gfp, float[][] pe, float[] ms_ener_ratio, III_psy_ratio[][] ratio)
{
var gfc = gfp.internal_flags;
var l3_xmin = new float[L3Side.SFBMAX];
var xrpow = new float[576];
var targ_bits = Arrays.ReturnRectangularArray <int>(2, 2);
var max_frame_bits = new int[1];
var analog_silence_bits = new int[1];
var l3_side = gfc.l3_side;
var mean_bits = 0;
quantize.calc_target_bits(gfp, pe, ms_ener_ratio, targ_bits, analog_silence_bits, max_frame_bits);
/*
* encode granules
*/
for (var gr = 0; gr < gfc.mode_gr; gr++)
{
if (gfc.mode_ext == Encoder.MPG_MD_MS_LR)
{
quantize.ms_convert(gfc.l3_side, gr);
}
for (var ch = 0; ch < gfc.channels_out; ch++)
{
float adjust, masking_lower_db;
var cod_info = l3_side.tt[gr][ch];
if (cod_info.block_type != Encoder.SHORT_TYPE)
{
// NORM, START or STOP type
adjust = 0;
masking_lower_db = gfc.PSY.mask_adjust - adjust;
}
else
{
adjust = 0;
masking_lower_db = gfc.PSY.mask_adjust_short - adjust;
}
gfc.masking_lower = (float)Math.Pow(10.0, masking_lower_db * 0.1);
/*
* cod_info, scalefac and xrpow get initialized in
* init_outer_loop
*/
quantize.init_outer_loop(gfc, cod_info);
if (quantize.init_xrpow(gfc, cod_info, xrpow))
{
/*
* xr contains energy we will have to encode calculate the
* masking abilities find some good quantization in
* outer_loop
*/
var ath_over = quantize.qupvt.calc_xmin(gfp, ratio[gr][ch], cod_info, l3_xmin);
if (0 == ath_over) // analog silence
{
targ_bits[gr][ch] = analog_silence_bits[0];
}
quantize.outer_loop(gfp, cod_info, l3_xmin, xrpow, ch, targ_bits[gr][ch]);
}
quantize.iteration_finish_one(gfc, gr, ch);
} // ch
} // gr
/*
* find a bitrate which can refill the resevoir to positive size.
*/
for (gfc.bitrate_index = gfc.VBR_min_bitrate; gfc.bitrate_index <= gfc.VBR_max_bitrate; gfc.bitrate_index++)
{
var mb = new MeanBits(mean_bits);
var rc = quantize.rv.ResvFrameBegin(gfp, mb);
mean_bits = mb.bits;
if (rc >= 0)
{
break;
}
}
Debug.Assert(gfc.bitrate_index <= gfc.VBR_max_bitrate);
quantize.rv.ResvFrameEnd(gfc, mean_bits);
}
public void iteration_loop(LameGlobalFlags gfp, float[][] pe, float[] ms_ener_ratio, III_psy_ratio[][] ratio)
{
var gfc = gfp.internal_flags;
var l3_xmin = new float[L3Side.SFBMAX];
var xrpow = new float[576];
var targ_bits = new int[2];
int mean_bits = 0, max_bits;
var l3_side = gfc.l3_side;
var mb = new MeanBits(mean_bits);
quantize.rv.ResvFrameBegin(gfp, mb);
mean_bits = mb.bits;
/* quantize! */
for (var gr = 0; gr < gfc.mode_gr; gr++)
{
/*
* calculate needed bits
*/
max_bits = quantize.qupvt.on_pe(gfp, pe, targ_bits, mean_bits, gr, gr);
if (gfc.mode_ext == Encoder.MPG_MD_MS_LR)
{
quantize.ms_convert(gfc.l3_side, gr);
quantize.qupvt.reduce_side(targ_bits, ms_ener_ratio[gr], mean_bits, max_bits);
}
for (var ch = 0; ch < gfc.channels_out; ch++)
{
float adjust, masking_lower_db;
var cod_info = l3_side.tt[gr][ch];
if (cod_info.block_type != Encoder.SHORT_TYPE)
{
// NORM, START or STOP type
adjust = 0;
masking_lower_db = gfc.PSY.mask_adjust - adjust;
}
else
{
adjust = 0;
masking_lower_db = gfc.PSY.mask_adjust_short - adjust;
}
gfc.masking_lower = (float)Math.Pow(10.0, masking_lower_db * 0.1);
/*
* init_outer_loop sets up cod_info, scalefac and xrpow
*/
quantize.init_outer_loop(gfc, cod_info);
if (quantize.init_xrpow(gfc, cod_info, xrpow))
{
/*
* xr contains energy we will have to encode calculate the
* masking abilities find some good quantization in
* outer_loop
*/
quantize.qupvt.calc_xmin(gfp, ratio[gr][ch], cod_info, l3_xmin);
quantize.outer_loop(gfp, cod_info, l3_xmin, xrpow, ch, targ_bits[ch]);
}
quantize.iteration_finish_one(gfc, gr, ch);
Debug.Assert(cod_info.part2_3_length <= LameInternalFlags.MAX_BITS_PER_CHANNEL);
Debug.Assert(cod_info.part2_3_length <= targ_bits[ch]);
} // for ch
} // for gr
quantize.rv.ResvFrameEnd(gfc, mean_bits);
}
public void iteration_loop(LameGlobalFlags gfp, float[][] pe, float[] ms_ener_ratio, III_psy_ratio[][] ratio)
{
var gfc = gfp.internal_flags;
var l3_xmin = Arrays.ReturnRectangularArray <float>(2, 2, L3Side.SFBMAX);
var xrpow = new float[576];
var bands = Arrays.ReturnRectangularArray <int>(2, 2);
var frameBits = new int[15];
var min_bits = Arrays.ReturnRectangularArray <int>(2, 2);
var max_bits = Arrays.ReturnRectangularArray <int>(2, 2);
var mean_bits = 0;
var l3_side = gfc.l3_side;
var analog_silence = quantize.VBR_old_prepare(
gfp,
pe,
ms_ener_ratio,
ratio,
l3_xmin,
frameBits,
min_bits,
max_bits,
bands);
/*---------------------------------*/
for (;;)
{
/*
* quantize granules with lowest possible number of bits
*/
var used_bits = 0;
for (var gr = 0; gr < gfc.mode_gr; gr++)
{
for (var ch = 0; ch < gfc.channels_out; ch++)
{
var cod_info = l3_side.tt[gr][ch];
/*
* init_outer_loop sets up cod_info, scalefac and xrpow
*/
var ret = quantize.init_xrpow(gfc, cod_info, xrpow);
if (!ret || max_bits[gr][ch] == 0)
{
continue; // with next channel
}
quantize.VBR_encode_granule(
gfp,
cod_info,
l3_xmin[gr][ch],
xrpow,
ch,
min_bits[gr][ch],
max_bits[gr][ch]);
/*
* do the 'substep shaping'
*/
if ((gfc.substep_shaping & 1) != 0)
{
quantize.trancate_smallspectrums(gfc, l3_side.tt[gr][ch], l3_xmin[gr][ch], xrpow);
}
var usedB = cod_info.part2_3_length + cod_info.part2_length;
used_bits += usedB;
} // for ch
}
/*
* find lowest bitrate able to hold used bits
*/
if (analog_silence != 0 && 0 == gfp.VBR_hard_min)
{
gfc.bitrate_index = 1;
}
else
{
gfc.bitrate_index = gfc.VBR_min_bitrate;
}
for (; gfc.bitrate_index < gfc.VBR_max_bitrate; gfc.bitrate_index++)
{
if (used_bits <= frameBits[gfc.bitrate_index])
{
break;
}
}
var mb = new MeanBits(mean_bits);
var bits = quantize.rv.ResvFrameBegin(gfp, mb);
mean_bits = mb.bits;
if (used_bits <= bits)
{
break;
}
quantize.bitpressure_strategy(gfc, l3_xmin, min_bits, max_bits);
}
/* breaks adjusted */
/*--------------------------------------*/
for (var gr = 0; gr < gfc.mode_gr; gr++)
{
for (var ch = 0; ch < gfc.channels_out; ch++)
{
quantize.iteration_finish_one(gfc, gr, ch);
}
}
quantize.rv.ResvFrameEnd(gfc, mean_bits);
}