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|
#include "stdafx.h"
typedef int ptrdiff_t;
/* C O N S T A N T S */
#undef _
#define MPC_FIXED_POINT_SYNTH_FIX 2
#define MPC_FIXED_POINT_SYNTH_FIX2 0
#define Di_opt_shift 30
#define _(value) MAKE_MPC_SAMPLE_EX((double)value/(double)(0x10000 << MPC_FIXED_POINT_SYNTH_FIX2),Di_opt_shift)
static const MPC_SAMPLE_FORMAT Di_opt [32] [16] = {
{ _( 0), _( -29), _( 213), _( -459), _( 2037), _(-5153), _( 6574), _(-37489), _(75038), _(37489), _(6574), _( 5153), _(2037), _( 459), _(213), _(29) },
{ _( -1), _( -31), _( 218), _( -519), _( 2000), _(-5517), _( 5959), _(-39336), _(74992), _(35640), _(7134), _( 4788), _(2063), _( 401), _(208), _(26) },
{ _( -1), _( -35), _( 222), _( -581), _( 1952), _(-5879), _( 5288), _(-41176), _(74856), _(33791), _(7640), _( 4425), _(2080), _( 347), _(202), _(24) },
{ _( -1), _( -38), _( 225), _( -645), _( 1893), _(-6237), _( 4561), _(-43006), _(74630), _(31947), _(8092), _( 4063), _(2087), _( 294), _(196), _(21) },
{ _( -1), _( -41), _( 227), _( -711), _( 1822), _(-6589), _( 3776), _(-44821), _(74313), _(30112), _(8492), _( 3705), _(2085), _( 244), _(190), _(19) },
{ _( -1), _( -45), _( 228), _( -779), _( 1739), _(-6935), _( 2935), _(-46617), _(73908), _(28289), _(8840), _( 3351), _(2075), _( 197), _(183), _(17) },
{ _( -1), _( -49), _( 228), _( -848), _( 1644), _(-7271), _( 2037), _(-48390), _(73415), _(26482), _(9139), _( 3004), _(2057), _( 153), _(176), _(16) },
{ _( -2), _( -53), _( 227), _( -919), _( 1535), _(-7597), _( 1082), _(-50137), _(72835), _(24694), _(9389), _( 2663), _(2032), _( 111), _(169), _(14) },
{ _( -2), _( -58), _( 224), _( -991), _( 1414), _(-7910), _( 70), _(-51853), _(72169), _(22929), _(9592), _( 2330), _(2001), _( 72), _(161), _(13) },
{ _( -2), _( -63), _( 221), _(-1064), _( 1280), _(-8209), _( -998), _(-53534), _(71420), _(21189), _(9750), _( 2006), _(1962), _( 36), _(154), _(11) },
{ _( -2), _( -68), _( 215), _(-1137), _( 1131), _(-8491), _( -2122), _(-55178), _(70590), _(19478), _(9863), _( 1692), _(1919), _( 2), _(147), _(10) },
{ _( -3), _( -73), _( 208), _(-1210), _( 970), _(-8755), _( -3300), _(-56778), _(69679), _(17799), _(9935), _( 1388), _(1870), _( -29), _(139), _( 9) },
{ _( -3), _( -79), _( 200), _(-1283), _( 794), _(-8998), _( -4533), _(-58333), _(68692), _(16155), _(9966), _( 1095), _(1817), _( -57), _(132), _( 8) },
{ _( -4), _( -85), _( 189), _(-1356), _( 605), _(-9219), _( -5818), _(-59838), _(67629), _(14548), _(9959), _( 814), _(1759), _( -83), _(125), _( 7) },
{ _( -4), _( -91), _( 177), _(-1428), _( 402), _(-9416), _( -7154), _(-61289), _(66494), _(12980), _(9916), _( 545), _(1698), _(-106), _(117), _( 7) },
{ _( -5), _( -97), _( 163), _(-1498), _( 185), _(-9585), _( -8540), _(-62684), _(65290), _(11455), _(9838), _( 288), _(1634), _(-127), _(111), _( 6) },
{ _( -5), _(-104), _( 146), _(-1567), _( -45), _(-9727), _( -9975), _(-64019), _(64019), _( 9975), _(9727), _( 45), _(1567), _(-146), _(104), _( 5) },
{ _( -6), _(-111), _( 127), _(-1634), _( -288), _(-9838), _(-11455), _(-65290), _(62684), _( 8540), _(9585), _( -185), _(1498), _(-163), _( 97), _( 5) },
{ _( -7), _(-117), _( 106), _(-1698), _( -545), _(-9916), _(-12980), _(-66494), _(61289), _( 7154), _(9416), _( -402), _(1428), _(-177), _( 91), _( 4) },
{ _( -7), _(-125), _( 83), _(-1759), _( -814), _(-9959), _(-14548), _(-67629), _(59838), _( 5818), _(9219), _( -605), _(1356), _(-189), _( 85), _( 4) },
{ _( -8), _(-132), _( 57), _(-1817), _(-1095), _(-9966), _(-16155), _(-68692), _(58333), _( 4533), _(8998), _( -794), _(1283), _(-200), _( 79), _( 3) },
{ _( -9), _(-139), _( 29), _(-1870), _(-1388), _(-9935), _(-17799), _(-69679), _(56778), _( 3300), _(8755), _( -970), _(1210), _(-208), _( 73), _( 3) },
{ _(-10), _(-147), _( -2), _(-1919), _(-1692), _(-9863), _(-19478), _(-70590), _(55178), _( 2122), _(8491), _(-1131), _(1137), _(-215), _( 68), _( 2) },
{ _(-11), _(-154), _( -36), _(-1962), _(-2006), _(-9750), _(-21189), _(-71420), _(53534), _( 998), _(8209), _(-1280), _(1064), _(-221), _( 63), _( 2) },
{ _(-13), _(-161), _( -72), _(-2001), _(-2330), _(-9592), _(-22929), _(-72169), _(51853), _( -70), _(7910), _(-1414), _( 991), _(-224), _( 58), _( 2) },
{ _(-14), _(-169), _(-111), _(-2032), _(-2663), _(-9389), _(-24694), _(-72835), _(50137), _(-1082), _(7597), _(-1535), _( 919), _(-227), _( 53), _( 2) },
{ _(-16), _(-176), _(-153), _(-2057), _(-3004), _(-9139), _(-26482), _(-73415), _(48390), _(-2037), _(7271), _(-1644), _( 848), _(-228), _( 49), _( 1) },
{ _(-17), _(-183), _(-197), _(-2075), _(-3351), _(-8840), _(-28289), _(-73908), _(46617), _(-2935), _(6935), _(-1739), _( 779), _(-228), _( 45), _( 1) },
{ _(-19), _(-190), _(-244), _(-2085), _(-3705), _(-8492), _(-30112), _(-74313), _(44821), _(-3776), _(6589), _(-1822), _( 711), _(-227), _( 41), _( 1) },
{ _(-21), _(-196), _(-294), _(-2087), _(-4063), _(-8092), _(-31947), _(-74630), _(43006), _(-4561), _(6237), _(-1893), _( 645), _(-225), _( 38), _( 1) },
{ _(-24), _(-202), _(-347), _(-2080), _(-4425), _(-7640), _(-33791), _(-74856), _(41176), _(-5288), _(5879), _(-1952), _( 581), _(-222), _( 35), _( 1) },
{ _(-26), _(-208), _(-401), _(-2063), _(-4788), _(-7134), _(-35640), _(-74992), _(39336), _(-5959), _(5517), _(-2000), _( 519), _(-218), _( 31), _( 1) }
};
#undef _
/* F U N K T I O N E N */
void
MPC_decoder::Reset_V ( void )
{
memset ( V_L, 0, sizeof V_L );
memset ( V_R, 0, sizeof V_R );
}
static void Calculate_New_V ( const MPC_SAMPLE_FORMAT * Sample, MPC_SAMPLE_FORMAT * V )
{
// Calculating new V-buffer values for left channel
// calculate new V-values (ISO-11172-3, p. 39)
// based upon fast-MDCT algorithm by Byeong Gi Lee
/*static*/ MPC_SAMPLE_FORMAT A00, A01, A02, A03, A04, A05, A06, A07, A08, A09, A10, A11, A12, A13, A14, A15;
/*static*/ MPC_SAMPLE_FORMAT B00, B01, B02, B03, B04, B05, B06, B07, B08, B09, B10, B11, B12, B13, B14, B15;
MPC_SAMPLE_FORMAT tmp;
A00 = Sample[ 0] + Sample[31];
A01 = Sample[ 1] + Sample[30];
A02 = Sample[ 2] + Sample[29];
A03 = Sample[ 3] + Sample[28];
A04 = Sample[ 4] + Sample[27];
A05 = Sample[ 5] + Sample[26];
A06 = Sample[ 6] + Sample[25];
A07 = Sample[ 7] + Sample[24];
A08 = Sample[ 8] + Sample[23];
A09 = Sample[ 9] + Sample[22];
A10 = Sample[10] + Sample[21];
A11 = Sample[11] + Sample[20];
A12 = Sample[12] + Sample[19];
A13 = Sample[13] + Sample[18];
A14 = Sample[14] + Sample[17];
A15 = Sample[15] + Sample[16];
B00 = A00 + A15;
B01 = A01 + A14;
B02 = A02 + A13;
B03 = A03 + A12;
B04 = A04 + A11;
B05 = A05 + A10;
B06 = A06 + A09;
B07 = A07 + A08;;
B08 = MPC_SCALE_CONST((A00 - A15) , 0.5024192929f , 31);
B09 = MPC_SCALE_CONST((A01 - A14) , 0.5224986076f , 31);
B10 = MPC_SCALE_CONST((A02 - A13) , 0.5669440627f , 31);
B11 = MPC_SCALE_CONST((A03 - A12) , 0.6468217969f , 31);
B12 = MPC_SCALE_CONST((A04 - A11) , 0.7881546021f , 31);
B13 = MPC_SCALE_CONST((A05 - A10) , 1.0606776476f , 30);
B14 = MPC_SCALE_CONST((A06 - A09) , 1.7224471569f , 30);
B15 = MPC_SCALE_CONST((A07 - A08) , 5.1011486053f , 28);
A00 = B00 + B07;
A01 = B01 + B06;
A02 = B02 + B05;
A03 = B03 + B04;
A04 = MPC_SCALE_CONST((B00 - B07) , 0.5097956061f , 31);
A05 = MPC_SCALE_CONST((B01 - B06) , 0.6013448834f , 31);
A06 = MPC_SCALE_CONST((B02 - B05) , 0.8999761939f , 31);
A07 = MPC_SCALE_CONST((B03 - B04) , 2.5629155636f , 29);
A08 = B08 + B15;
A09 = B09 + B14;
A10 = B10 + B13;
A11 = B11 + B12;
A12 = MPC_SCALE_CONST((B08 - B15) , 0.5097956061f , 31);
A13 = MPC_SCALE_CONST((B09 - B14) , 0.6013448834f , 31);
A14 = MPC_SCALE_CONST((B10 - B13) , 0.8999761939f , 31);
A15 = MPC_SCALE_CONST((B11 - B12) , 2.5629155636f , 29);
B00 = A00 + A03;
B01 = A01 + A02;
B02 = MPC_SCALE_CONST((A00 - A03) , 0.5411961079f , 31);
B03 = MPC_SCALE_CONST((A01 - A02) , 1.3065630198f , 30);
B04 = A04 + A07;
B05 = A05 + A06;
B06 = MPC_SCALE_CONST((A04 - A07) , 0.5411961079f , 31);
B07 = MPC_SCALE_CONST((A05 - A06) , 1.3065630198f , 30);
B08 = A08 + A11;
B09 = A09 + A10;
B10 = MPC_SCALE_CONST((A08 - A11) , 0.5411961079f , 31);
B11 = MPC_SCALE_CONST((A09 - A10) , 1.3065630198f , 30);
B12 = A12 + A15;
B13 = A13 + A14;
B14 = MPC_SCALE_CONST((A12 - A15) , 0.5411961079f , 31);
B15 = MPC_SCALE_CONST((A13 - A14) , 1.3065630198f , 30);
A00 = B00 + B01;
A01 = MPC_SCALE_CONST((B00 - B01) , 0.7071067691f , 31);
A02 = B02 + B03;
A03 = MPC_SCALE_CONST((B02 - B03) , 0.7071067691f , 31);
A04 = B04 + B05;
A05 = MPC_SCALE_CONST((B04 - B05) , 0.7071067691f , 31);
A06 = B06 + B07;
A07 = MPC_SCALE_CONST((B06 - B07) , 0.7071067691f , 31);
A08 = B08 + B09;
A09 = MPC_SCALE_CONST((B08 - B09) , 0.7071067691f , 31);
A10 = B10 + B11;
A11 = MPC_SCALE_CONST((B10 - B11) , 0.7071067691f , 31);
A12 = B12 + B13;
A13 = MPC_SCALE_CONST((B12 - B13) , 0.7071067691f , 31);
A14 = B14 + B15;
A15 = MPC_SCALE_CONST((B14 - B15) , 0.7071067691f , 31);
V[48] = -A00;
V[ 0] = A01;
V[40] = -A02 - (V[ 8] = A03);
V[36] = -((V[ 4] = A05 + (V[12] = A07)) + A06);
V[44] = - A04 - A06 - A07;
V[ 6] = (V[10] = A11 + (V[14] = A15)) + A13;
V[38] = (V[34] = -(V[ 2] = A09 + A13 + A15) - A14) + A09 - A10 - A11;
V[46] = (tmp = -(A12 + A14 + A15)) - A08;
V[42] = tmp - A10 - A11;
A00 = MPC_SCALE_CONST_SHR((Sample[ 0] - Sample[31]) , 0.5006030202f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A01 = MPC_SCALE_CONST_SHR((Sample[ 1] - Sample[30]) , 0.5054709315f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A02 = MPC_SCALE_CONST_SHR((Sample[ 2] - Sample[29]) , 0.5154473186f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A03 = MPC_SCALE_CONST_SHR((Sample[ 3] - Sample[28]) , 0.5310425758f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A04 = MPC_SCALE_CONST_SHR((Sample[ 4] - Sample[27]) , 0.5531039238f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A05 = MPC_SCALE_CONST_SHR((Sample[ 5] - Sample[26]) , 0.5829349756f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A06 = MPC_SCALE_CONST_SHR((Sample[ 6] - Sample[25]) , 0.6225041151f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A07 = MPC_SCALE_CONST_SHR((Sample[ 7] - Sample[24]) , 0.6748083234f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A08 = MPC_SCALE_CONST_SHR((Sample[ 8] - Sample[23]) , 0.7445362806f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A09 = MPC_SCALE_CONST_SHR((Sample[ 9] - Sample[22]) , 0.8393496275f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A10 = MPC_SCALE_CONST_SHR((Sample[10] - Sample[21]) , 0.9725682139f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A11 = MPC_SCALE_CONST_SHR((Sample[11] - Sample[20]) , 1.1694399118f , 30, MPC_FIXED_POINT_SYNTH_FIX);
A12 = MPC_SCALE_CONST_SHR((Sample[12] - Sample[19]) , 1.4841645956f , 30, MPC_FIXED_POINT_SYNTH_FIX);
A13 = MPC_SCALE_CONST_SHR((Sample[13] - Sample[18]) , 2.0577809811f , 29, MPC_FIXED_POINT_SYNTH_FIX);
A14 = MPC_SCALE_CONST_SHR((Sample[14] - Sample[17]) , 3.4076085091f , 29, MPC_FIXED_POINT_SYNTH_FIX);
A15 = MPC_SCALE_CONST_SHR((Sample[15] - Sample[16]) , 10.1900081635f, 27 ,MPC_FIXED_POINT_SYNTH_FIX);
B00 = A00 + A15;
B01 = A01 + A14;
B02 = A02 + A13;
B03 = A03 + A12;
B04 = A04 + A11;
B05 = A05 + A10;
B06 = A06 + A09;
B07 = A07 + A08;
B08 = MPC_SCALE_CONST((A00 - A15) , 0.5024192929f , 31);
B09 = MPC_SCALE_CONST((A01 - A14) , 0.5224986076f , 31);
B10 = MPC_SCALE_CONST((A02 - A13) , 0.5669440627f , 31);
B11 = MPC_SCALE_CONST((A03 - A12) , 0.6468217969f , 31);
B12 = MPC_SCALE_CONST((A04 - A11) , 0.7881546021f , 31);
B13 = MPC_SCALE_CONST((A05 - A10) , 1.0606776476f , 30);
B14 = MPC_SCALE_CONST((A06 - A09) , 1.7224471569f , 30);
B15 = MPC_SCALE_CONST((A07 - A08) , 5.1011486053f , 28);
A00 = B00 + B07;
A01 = B01 + B06;
A02 = B02 + B05;
A03 = B03 + B04;
A04 = MPC_SCALE_CONST((B00 - B07) , 0.5097956061f , 31);
A05 = MPC_SCALE_CONST((B01 - B06) , 0.6013448834f , 31);
A06 = MPC_SCALE_CONST((B02 - B05) , 0.8999761939f , 31);
A07 = MPC_SCALE_CONST((B03 - B04) , 2.5629155636f , 29);
A08 = B08 + B15;
A09 = B09 + B14;
A10 = B10 + B13;
A11 = B11 + B12;
A12 = MPC_SCALE_CONST((B08 - B15) , 0.5097956061f , 31);
A13 = MPC_SCALE_CONST((B09 - B14) , 0.6013448834f , 31);
A14 = MPC_SCALE_CONST((B10 - B13) , 0.8999761939f , 31);
A15 = MPC_SCALE_CONST((B11 - B12) , 2.5629155636f , 29);
B00 = A00 + A03;
B01 = A01 + A02;
B02 = MPC_SCALE_CONST((A00 - A03) , 0.5411961079f , 31);
B03 = MPC_SCALE_CONST((A01 - A02) , 1.3065630198f , 30);
B04 = A04 + A07;
B05 = A05 + A06;
B06 = MPC_SCALE_CONST((A04 - A07) , 0.5411961079f , 31);
B07 = MPC_SCALE_CONST((A05 - A06) , 1.3065630198f , 30);
B08 = A08 + A11;
B09 = A09 + A10;
B10 = MPC_SCALE_CONST((A08 - A11) , 0.5411961079f , 31);
B11 = MPC_SCALE_CONST((A09 - A10) , 1.3065630198f , 30);
B12 = A12 + A15;
B13 = A13 + A14;
B14 = MPC_SCALE_CONST((A12 - A15) , 0.5411961079f , 31);
B15 = MPC_SCALE_CONST((A13 - A14) , 1.3065630198f , 30);
A00 = MPC_SHL(B00 + B01, MPC_FIXED_POINT_SYNTH_FIX);
A01 = MPC_SCALE_CONST_SHL((B00 - B01) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A02 = MPC_SHL(B02 + B03, MPC_FIXED_POINT_SYNTH_FIX);
A03 = MPC_SCALE_CONST_SHL((B02 - B03) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A04 = MPC_SHL(B04 + B05, MPC_FIXED_POINT_SYNTH_FIX);
A05 = MPC_SCALE_CONST_SHL((B04 - B05) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A06 = MPC_SHL(B06 + B07, MPC_FIXED_POINT_SYNTH_FIX);
A07 = MPC_SCALE_CONST_SHL((B06 - B07) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A08 = MPC_SHL(B08 + B09, MPC_FIXED_POINT_SYNTH_FIX);
A09 = MPC_SCALE_CONST_SHL((B08 - B09) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A10 = MPC_SHL(B10 + B11, MPC_FIXED_POINT_SYNTH_FIX);
A11 = MPC_SCALE_CONST_SHL((B10 - B11) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A12 = MPC_SHL(B12 + B13, MPC_FIXED_POINT_SYNTH_FIX);
A13 = MPC_SCALE_CONST_SHL((B12 - B13) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
A14 = MPC_SHL(B14 + B15, MPC_FIXED_POINT_SYNTH_FIX);
A15 = MPC_SCALE_CONST_SHL((B14 - B15) , 0.7071067691f , 31, MPC_FIXED_POINT_SYNTH_FIX);
// mehrfach verwendete Ausdrücke: A04+A06+A07, A09+A13+A15
V[ 5] = (V[11] = (V[13] = A07 + (V[15] = A15)) + A11) + A05 + A13;
V[ 7] = (V[ 9] = A03 + A11 + A15) + A13;
V[33] = -(V[ 1] = A01 + A09 + A13 + A15) - A14;
V[35] = -(V[ 3] = A05 + A07 + A09 + A13 + A15) - A06 - A14;
V[37] = (tmp = -(A10 + A11 + A13 + A14 + A15)) - A05 - A06 - A07;
V[39] = tmp - A02 - A03; // abhängig vom Befehl drüber
V[41] = (tmp += A13 - A12) - A02 - A03; // abhängig vom Befehl 2 drüber
V[43] = tmp - A04 - A06 - A07; // abhängig von Befehlen 1 und 3 drüber
V[47] = (tmp = -(A08 + A12 + A14 + A15)) - A00;
V[45] = tmp - A04 - A06 - A07; // abhängig vom Befehl drüber
V[32] = -V[ 0];
V[31] = -V[ 1];
V[30] = -V[ 2];
V[29] = -V[ 3];
V[28] = -V[ 4];
V[27] = -V[ 5];
V[26] = -V[ 6];
V[25] = -V[ 7];
V[24] = -V[ 8];
V[23] = -V[ 9];
V[22] = -V[10];
V[21] = -V[11];
V[20] = -V[12];
V[19] = -V[13];
V[18] = -V[14];
V[17] = -V[15];
V[63] = V[33];
V[62] = V[34];
V[61] = V[35];
V[60] = V[36];
V[59] = V[37];
V[58] = V[38];
V[57] = V[39];
V[56] = V[40];
V[55] = V[41];
V[54] = V[42];
V[53] = V[43];
V[52] = V[44];
V[51] = V[45];
V[50] = V[46];
V[49] = V[47];
}
static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPLE_FORMAT * V,const MPC_SAMPLE_FORMAT * Y)
{
unsigned n;
for ( n = 0; n < 36; n++, Y += 32 ) {
V -= 64;
Calculate_New_V ( Y, V );
{
MPC_SAMPLE_FORMAT * Data = OutData;
const MPC_SAMPLE_FORMAT * D = (const MPC_SAMPLE_FORMAT *) &Di_opt;
int k;
//int tmp;
for ( k = 0; k < 32; k++, D += 16, V++ ) {
*Data = (
( MPC_MULTIPLY_EX(V[ 0],D[ 0],Di_opt_shift) + MPC_MULTIPLY_EX(V[ 96],D[ 1],Di_opt_shift) + MPC_MULTIPLY_EX(V[128],D[ 2],Di_opt_shift) + MPC_MULTIPLY_EX(V[224],D[ 3],Di_opt_shift)
+ MPC_MULTIPLY_EX(V[256],D[ 4],Di_opt_shift) + MPC_MULTIPLY_EX(V[352],D[ 5],Di_opt_shift) + MPC_MULTIPLY_EX(V[384],D[ 6],Di_opt_shift) + MPC_MULTIPLY_EX(V[480],D[ 7],Di_opt_shift)
+ MPC_MULTIPLY_EX(V[512],D[ 8],Di_opt_shift) + MPC_MULTIPLY_EX(V[608],D[ 9],Di_opt_shift) + MPC_MULTIPLY_EX(V[640],D[10],Di_opt_shift) + MPC_MULTIPLY_EX(V[736],D[11],Di_opt_shift)
+ MPC_MULTIPLY_EX(V[768],D[12],Di_opt_shift) + MPC_MULTIPLY_EX(V[864],D[13],Di_opt_shift) + MPC_MULTIPLY_EX(V[896],D[14],Di_opt_shift) + MPC_MULTIPLY_EX(V[992],D[15],Di_opt_shift) ) );
Data += 2;
}
V -= 32;//bleh
OutData+=64;
}
}
}
void
MPC_decoder::Synthese_Filter_float ( MPC_SAMPLE_FORMAT* OutData )
{
/********* left channel ********/
memmove ( V_L + V_MEM, V_L, 960 * sizeof(MPC_SAMPLE_FORMAT) );
Synthese_Filter_float_internal(OutData,reinterpret_cast<MPC_SAMPLE_FORMAT*>(V_L + V_MEM),reinterpret_cast<MPC_SAMPLE_FORMAT*>(Y_L [0]));
/******** right channel ********/
memmove ( V_R + V_MEM, V_R, 960 * sizeof(MPC_SAMPLE_FORMAT) );
Synthese_Filter_float_internal(OutData+1,reinterpret_cast<MPC_SAMPLE_FORMAT*>(V_R + V_MEM),reinterpret_cast<MPC_SAMPLE_FORMAT*>(Y_R [0]));
}
/*******************************************/
/* */
/* dithered synthesis */
/* */
/*******************************************/
static const unsigned char Parity [256] = { // parity
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0
};
/*
* This is a simple random number generator with good quality for audio purposes.
* It consists of two polycounters with opposite rotation direction and different
* periods. The periods are coprime, so the total period is the product of both.
*
* -------------------------------------------------------------------------------------------------
* +-> |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0|
* | -------------------------------------------------------------------------------------------------
* | | | | | | |
* | +--+--+--+-XOR-+--------+
* | |
* +--------------------------------------------------------------------------------------+
*
* -------------------------------------------------------------------------------------------------
* |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0| <-+
* ------------------------------------------------------------------------------------------------- |
* | | | | |
* +--+----XOR----+--+ |
* | |
* +----------------------------------------------------------------------------------------+
*
*
* The first has an period of 3*5*17*257*65537, the second of 7*47*73*178481,
* which gives a period of 18.410.713.077.675.721.215. The result is the
* XORed values of both generators.
*/
unsigned int
MPC_decoder::random_int ( void )
{
#if 1
unsigned int t1, t2, t3, t4;
t3 = t1 = __r1; t4 = t2 = __r2; // Parity calculation is done via table lookup, this is also available
t1 &= 0xF5; t2 >>= 25; // on CPUs without parity, can be implemented in C and avoid unpredictable
t1 = Parity [t1]; t2 &= 0x63; // jumps and slow rotate through the carry flag operations.
t1 <<= 31; t2 = Parity [t2];
return (__r1 = (t3 >> 1) | t1 ) ^ (__r2 = (t4 + t4) | t2 );
#else
return (__r1 = (__r1 >> 1) | ((unsigned int)Parity [__r1 & 0xF5] << 31) ) ^
(__r2 = (__r2 << 1) | (unsigned int)Parity [(__r2 >> 25) & 0x63] );
#endif
}
|
