internal static void quant_coarse_energy(CeltMode m, int start, int end, int effEnd,
int[][] eBands, int[][] oldEBands, uint budget,
int[][] error, EntropyCoder enc, int C, int LM, int nbAvailableBytes,
int force_intra, ref int delayedIntra, int two_pass, int loss_rate, int lfe)
{
int intra;
int max_decay;
int[][] oldEBands_intra;
int[][] error_intra;
EntropyCoder enc_start_state = new EntropyCoder(); // [porting note] stack variable
uint tell;
int badness1 = 0;
int intra_bias;
int new_distortion;
intra = (force_intra != 0 || (two_pass == 0 && delayedIntra > 2 * C * (end - start) && nbAvailableBytes > (end - start) * C)) ? 1 : 0;
intra_bias = (int)((budget * delayedIntra * loss_rate) / (C * 512));
new_distortion = loss_distortion(eBands, oldEBands, start, effEnd, m.nbEBands, C);
tell = (uint)enc.tell();
if (tell + 3 > budget)
{
two_pass = intra = 0;
}
max_decay = ((short)(0.5 + (16.0f) * (((int)1) << (CeltConstants.DB_SHIFT)))) /*Inlines.QCONST16(16.0f, CeltConstants.DB_SHIFT)*/;
if (end - start > 10)
{
max_decay = (Inlines.MIN32(max_decay, Inlines.SHL32(nbAvailableBytes, CeltConstants.DB_SHIFT - 3))); // opus bug: useless extend32
}
if (lfe != 0)
{
max_decay = ((short)(0.5 + (3.0f) * (((int)1) << (CeltConstants.DB_SHIFT)))) /*Inlines.QCONST16(3.0f, CeltConstants.DB_SHIFT)*/;
}
enc_start_state.Assign(enc);
oldEBands_intra = Arrays.InitTwoDimensionalArray <int>(C, m.nbEBands);
error_intra = Arrays.InitTwoDimensionalArray <int>(C, m.nbEBands);
Array.Copy(oldEBands[0], 0, oldEBands_intra[0], 0, m.nbEBands);
if (C == 2)
{
Array.Copy(oldEBands[1], 0, oldEBands_intra[1], 0, m.nbEBands);
}
if (two_pass != 0 || intra != 0)
{
badness1 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands_intra, (int)budget,
(int)tell, Tables.e_prob_model[LM][1], error_intra, enc, C, LM, 1, max_decay, lfe);
}
if (intra == 0)
{
int intra_buf;
EntropyCoder enc_intra_state = new EntropyCoder(); // [porting note] stack variable
int tell_intra;
uint nstart_bytes;
uint nintra_bytes;
uint save_bytes;
int badness2;
byte[] intra_bits = null;
tell_intra = (int)enc.tell_frac();
enc_intra_state.Assign(enc);
nstart_bytes = enc_start_state.range_bytes();
nintra_bytes = enc_intra_state.range_bytes();
intra_buf = enc_intra_state.buf_ptr + (int)nstart_bytes;
save_bytes = nintra_bytes - nstart_bytes;
if (save_bytes != 0)
{
intra_bits = new byte[(int)save_bytes];
/* Copy bits from intra bit-stream */
Array.Copy(enc_intra_state.buf, intra_buf, intra_bits, 0, (int)save_bytes);
}
enc.Assign(enc_start_state);
badness2 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands, (int)budget,
(int)tell, Tables.e_prob_model[LM][intra], error, enc, C, LM, 0, max_decay, lfe);
if (two_pass != 0 && (badness1 < badness2 || (badness1 == badness2 && ((int)enc.tell_frac()) + intra_bias > tell_intra)))
{
enc.Assign(enc_intra_state);
/* Copy intra bits to bit-stream */
if (intra_bits != null)
{
Array.Copy(intra_bits, 0, enc_intra_state.buf, intra_buf, (int)(nintra_bytes - nstart_bytes));
}
Array.Copy(oldEBands_intra[0], 0, oldEBands[0], 0, m.nbEBands);
Array.Copy(error_intra[0], 0, error[0], 0, m.nbEBands);
if (C == 2)
{
Array.Copy(oldEBands_intra[1], 0, oldEBands[1], 0, m.nbEBands);
Array.Copy(error_intra[1], 0, error[1], 0, m.nbEBands);
}
intra = 1;
}
}
else
{
Array.Copy(oldEBands_intra[0], 0, oldEBands[0], 0, m.nbEBands);
Array.Copy(error_intra[0], 0, error[0], 0, m.nbEBands);
if (C == 2)
{
Array.Copy(oldEBands_intra[1], 0, oldEBands[1], 0, m.nbEBands);
Array.Copy(error_intra[1], 0, error[1], 0, m.nbEBands);
}
}
if (intra != 0)
{
delayedIntra = new_distortion;
}
else
{
delayedIntra = Inlines.ADD32(Inlines.MULT16_32_Q15(Inlines.MULT16_16_Q15(pred_coef[LM], pred_coef[LM]), delayedIntra),
new_distortion);
}
}
