public FRAME_CONTEXT CopyOf()
{
var copy = new FRAME_CONTEXT();
Array.Copy(bmode_prob, copy.bmode_prob, bmode_prob.Length);
Array.Copy(ymode_prob, copy.ymode_prob, ymode_prob.Length);
Array.Copy(uv_mode_prob, copy.uv_mode_prob, uv_mode_prob.Length);
Array.Copy(sub_mv_ref_prob, copy.sub_mv_ref_prob, sub_mv_ref_prob.Length);
Array.Copy(coef_probs, copy.coef_probs, coef_probs.Length);
Array.Copy(mvc, copy.mvc, mvc.Length);
return(copy);
}
public static int vp8_decode_mb_tokens(VP8D_COMP dx, MACROBLOCKD x)
{
BOOL_DECODER bc = x.current_bc;
FRAME_CONTEXT fc = dx.common.fc;
//char* eobs = x->eobs;
sbyte[] eobs = x.eobs;
int i;
int nonzeros;
int eobtotal = 0;
//short* qcoeff_ptr;
//ProbaArray coef_probs;
//int coefIndex = entropy.COEF_BANDS * entropy.PREV_COEF_CONTEXTS * entropy.ENTROPY_NODES;
//ENTROPY_CONTEXT* a_ctx = ((ENTROPY_CONTEXT*)x->above_context);
//ENTROPY_CONTEXT* l_ctx = ((ENTROPY_CONTEXT*)x->left_context);
//ENTROPY_CONTEXT* a;
//ENTROPY_CONTEXT* l;
int blockSlice = entropy.COEF_BANDS * entropy.PREV_COEF_CONTEXTS * entropy.ENTROPY_NODES;
fixed(byte *pCoefProbs = fc.coef_probs)
{
byte *coef_probs = null;
fixed(sbyte *pAboveCtx = x.above_context.get().y1, pLeftContext = x.left_context.y1)
{
ENTROPY_CONTEXT *a_ctx = pAboveCtx;
ENTROPY_CONTEXT *l_ctx = pLeftContext;
ENTROPY_CONTEXT *a;
ENTROPY_CONTEXT *l;
int skip_dc = 0;
//qcoeff_ptr = x.qcoeff[0];
fixed(short *pQcoeff = x.qcoeff)
{
short *qcoeff_ptr = pQcoeff;
if (x.mode_info_context.get().mbmi.is_4x4 == 0)
{
a = a_ctx + 8;
l = l_ctx + 8;
//coef_probs = fc.coef_probs[1];
coef_probs = pCoefProbs + blockSlice;
nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), 0, qcoeff_ptr + 24 * 16);
*a = *l = (sbyte)(nonzeros > 0 ? 1 : 0);
eobs[24] = (sbyte)nonzeros;
eobtotal += nonzeros - 16;
//coef_probs = fc.coef_probs[0];
coef_probs = pCoefProbs;
skip_dc = 1;
}
else
{
//coef_probs = fc.coef_probs[3];
coef_probs = pCoefProbs + 3 * blockSlice;
skip_dc = 0;
}
for (i = 0; i < 16; ++i)
{
a = a_ctx + (i & 3);
l = l_ctx + ((i & 0xc) >> 2);
nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), skip_dc, qcoeff_ptr);
*a = *l = (sbyte)(nonzeros > 0 ? 1 : 0);
nonzeros += skip_dc;
eobs[i] = (sbyte)nonzeros;
eobtotal += nonzeros;
qcoeff_ptr += 16;
}
//coef_probs = fc.coef_probs[2];
coef_probs = pCoefProbs + 2 * blockSlice;
a_ctx += 4;
l_ctx += 4;
for (i = 16; i < 24; ++i)
{
a = a_ctx + ((i > 19 ? 1 : 0) << 1) + (i & 1);
l = l_ctx + ((i > 19 ? 1 : 0) << 1) + ((i & 3) > 1 ? 1 : 0);
nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), 0, qcoeff_ptr);
*a = *l = (sbyte)(nonzeros > 0 ? 1 : 0);
eobs[i] = (sbyte)nonzeros;
eobtotal += nonzeros;
qcoeff_ptr += 16;
}
}
}
}
return(eobtotal);
}
