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Unroll mpc's requantization loops for some (minor) speed up.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25891 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann 2010-05-07 21:36:55 +00:00
parent 7831a23376
commit 452c5b2197
1 changed files with 60 additions and 19 deletions
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79
apps/codecs/libmusepack/mpc_decoder.c
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@ -125,54 +125,95 @@ void mpc_decoder_read_bitstream_sv8(mpc_decoder * d, mpc_bits_reader * r,
//------------------------------------------------------------------------------
// macros
//------------------------------------------------------------------------------
#define REQUANT_M1_S1_SAMPLES(IDX) \
*(YL+=IDX) = (templ = MPC_MULTIPLY_FLOAT_INT(facL,*L++))+(tempr = MPC_MULTIPLY_FLOAT_INT(facR,*R++)); \
*(YR+=IDX) = templ - tempr;
#define REQUANT_M1_S1(SUBFRAME) \
facL = MPC_MULTIPLY_SCF( Cc[d->Res_L[Band]] , d->SCF_Index_L[Band][SUBFRAME] & 0xFF); \
facR = MPC_MULTIPLY_SCF( Cc[d->Res_R[Band]] , d->SCF_Index_R[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YL = (templ = MPC_MULTIPLY_FLOAT_INT(facL,*L++))+(tempr = MPC_MULTIPLY_FLOAT_INT(facR,*R++)); \
*YR = templ - tempr; \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_M1_S1_SAMPLES( 0); \
REQUANT_M1_S1_SAMPLES(32); \
REQUANT_M1_S1_SAMPLES(32); \
REQUANT_M1_S1_SAMPLES(32); \
}
#define REQUANT_M1_S0_SAMPLES(IDX) \
*(YR+=IDX) = *(YL+=IDX) = MPC_MULTIPLY_FLOAT_INT(facL,*L++);
#define REQUANT_M1_S0(SUBFRAME) \
facL = MPC_MULTIPLY_SCF( Cc[d->Res_L[Band]] , d->SCF_Index_L[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YR = *YL = MPC_MULTIPLY_FLOAT_INT(facL,*L++); \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_M1_S0_SAMPLES( 0); \
REQUANT_M1_S0_SAMPLES(32); \
REQUANT_M1_S0_SAMPLES(32); \
REQUANT_M1_S0_SAMPLES(32); \
}
#define REQUANT_M0_S1_SAMPLES(IDX) \
*(YR+=IDX) = -(*(YL+=IDX) = MPC_MULTIPLY_FLOAT_INT(facR,*R++));
#define REQUANT_M0_S1(SUBFRAME) \
facR = MPC_MULTIPLY_SCF( Cc[d->Res_R[Band]] , d->SCF_Index_R[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YR = - (*YL = MPC_MULTIPLY_FLOAT_INT(facR,*R++)); \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_M0_S1_SAMPLES( 0); \
REQUANT_M0_S1_SAMPLES(32); \
REQUANT_M0_S1_SAMPLES(32); \
REQUANT_M0_S1_SAMPLES(32); \
}
#define REQUANT_L1_R1_SAMPLES(IDX) \
*(YL+=IDX) = MPC_MULTIPLY_FLOAT_INT(facL,*L++); \
*(YR+=IDX) = MPC_MULTIPLY_FLOAT_INT(facR,*R++);
#define REQUANT_L1_R1(SUBFRAME) \
facL = MPC_MULTIPLY_SCF( Cc[d->Res_L[Band]] , d->SCF_Index_L[Band][SUBFRAME] & 0xFF); \
facR = MPC_MULTIPLY_SCF( Cc[d->Res_R[Band]] , d->SCF_Index_R[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YL = MPC_MULTIPLY_FLOAT_INT(facL,*L++); \
*YR = MPC_MULTIPLY_FLOAT_INT(facR,*R++); \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_L1_R1_SAMPLES( 0); \
REQUANT_L1_R1_SAMPLES(32); \
REQUANT_L1_R1_SAMPLES(32); \
REQUANT_L1_R1_SAMPLES(32); \
}
#define REQUANT_L1_R0_SAMPLES(IDX) \
*(YL+=IDX) = MPC_MULTIPLY_FLOAT_INT(facL,*L++); \
*(YR+=IDX) = 0;
#define REQUANT_L1_R0(SUBFRAME) \
facL = MPC_MULTIPLY_SCF( Cc[d->Res_L[Band]] , d->SCF_Index_L[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YL = MPC_MULTIPLY_FLOAT_INT(facL,*L++); \
*YR = 0; \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_L1_R0_SAMPLES( 0); \
REQUANT_L1_R0_SAMPLES(32); \
REQUANT_L1_R0_SAMPLES(32); \
REQUANT_L1_R0_SAMPLES(32); \
}
#define REQUANT_L0_R1_SAMPLES(IDX) \
*(YL+=IDX) = 0; \
*(YR+=IDX) = MPC_MULTIPLY_FLOAT_INT(facR,*R++);
#define REQUANT_L0_R1(SUBFRAME) \
facR = MPC_MULTIPLY_SCF( Cc[d->Res_R[Band]] , d->SCF_Index_R[Band][SUBFRAME] & 0xFF); \
for (n = 0; n < 12; n++, YL += 32, YR += 32) { \
*YL = 0; \
*YR = MPC_MULTIPLY_FLOAT_INT(facR,*R++); \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_L0_R1_SAMPLES( 0); \
REQUANT_L0_R1_SAMPLES(32); \
REQUANT_L0_R1_SAMPLES(32); \
REQUANT_L0_R1_SAMPLES(32); \
}
#define REQUANT_SILENCE_SAMPLES(IDX) \
*(YR+=IDX) = *(YL+=IDX) = 0;
#define REQUANT_SILENCE \
for (n = 0; n < 36; n++, YL += 32, YR += 32) { \
*YR = *YL = 0; \
for (n = 0; n < 12; n+=4, YL += 32, YR += 32) { \
REQUANT_SILENCE_SAMPLES( 0); \
REQUANT_SILENCE_SAMPLES(32); \
REQUANT_SILENCE_SAMPLES(32); \
REQUANT_SILENCE_SAMPLES(32); \
}
/**
* set the scf indexes for seeking use
* needed only for sv7 seeking