[opus] [PATCH 1/5] Revise celt_fir_c() to not pass in argument "mem"
Linfeng Zhang
linfengz at google.com
Thu Jul 14 00:48:58 UTC 2016
The "mem" in celt_fir_c() either is contained in the head of input "x" in
reverse order already, or can be easily attached to the head of "x" before
calling the function. Removing argument "mem" can eliminate the redundant buffer
copies inside.
Update celt_fir_sse4_1() accordingly.
---
celt/celt_decoder.c | 10 ++++-----
celt/celt_lpc.c | 33 +++++++++++-------------------
celt/celt_lpc.h | 5 ++---
celt/x86/celt_lpc_sse.c | 51 +++++++++-------------------------------------
celt/x86/celt_lpc_sse.h | 10 ++++-----
celt/x86/x86_celt_map.c | 1 -
silk/LPC_analysis_filter.c | 6 +-----
7 files changed, 34 insertions(+), 82 deletions(-)
diff --git a/celt/celt_decoder.c b/celt/celt_decoder.c
index b978bb3..f8433eb 100644
--- a/celt/celt_decoder.c
+++ b/celt/celt_decoder.c
@@ -509,7 +509,7 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
opus_val16 fade = Q15ONE;
int pitch_index;
VARDECL(opus_val32, etmp);
- VARDECL(opus_val16, exc);
+ VARDECL(opus_val16, _exc);
if (loss_count == 0)
{
@@ -520,7 +520,8 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
}
ALLOC(etmp, overlap, opus_val32);
- ALLOC(exc, MAX_PERIOD, opus_val16);
+ ALLOC(_exc, MAX_PERIOD+LPC_ORDER, opus_val16);
+ opus_val16 *exc = _exc+LPC_ORDER;
window = mode->window;
c=0; do {
opus_val16 decay;
@@ -568,15 +569,14 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
/* Initialize the LPC history with the samples just before the start
of the region for which we're computing the excitation. */
{
- opus_val16 lpc_mem[LPC_ORDER];
for (i=0;i<LPC_ORDER;i++)
{
- lpc_mem[i] =
+ exc[MAX_PERIOD-exc_length-1-i] =
ROUND16(buf[DECODE_BUFFER_SIZE-exc_length-1-i], SIG_SHIFT);
}
/* Compute the excitation for exc_length samples before the loss. */
celt_fir(exc+MAX_PERIOD-exc_length, lpc+c*LPC_ORDER,
- exc+MAX_PERIOD-exc_length, exc_length, LPC_ORDER, lpc_mem, st->arch);
+ exc+MAX_PERIOD-exc_length, exc_length, LPC_ORDER, st->arch);
}
/* Check if the waveform is decaying, and if so how fast.
diff --git a/celt/celt_lpc.c b/celt/celt_lpc.c
index b410a21..a7938af 100644
--- a/celt/celt_lpc.c
+++ b/celt/celt_lpc.c
@@ -89,56 +89,47 @@ int p
void celt_fir_c(
- const opus_val16 *_x,
+ const opus_val16 *x,
const opus_val16 *num,
- opus_val16 *_y,
+ opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch)
{
int i,j;
VARDECL(opus_val16, rnum);
- VARDECL(opus_val16, x);
SAVE_STACK;
ALLOC(rnum, ord, opus_val16);
- ALLOC(x, N+ord, opus_val16);
for(i=0;i<ord;i++)
rnum[i] = num[ord-i-1];
- for(i=0;i<ord;i++)
- x[i] = mem[ord-i-1];
- for (i=0;i<N;i++)
- x[i+ord]=_x[i];
- for(i=0;i<ord;i++)
- mem[i] = _x[N-i-1];
#ifdef SMALL_FOOTPRINT
(void)arch;
for (i=0;i<N;i++)
{
- opus_val32 sum = SHL32(EXTEND32(_x[i]), SIG_SHIFT);
+ opus_val32 sum = SHL32(EXTEND32(x[i]), SIG_SHIFT);
for (j=0;j<ord;j++)
{
- sum = MAC16_16(sum,rnum[j],x[i+j]);
+ sum = MAC16_16(sum,rnum[j],x[i+j-ord]);
}
- _y[i] = SATURATE16(PSHR32(sum, SIG_SHIFT));
+ y[i] = SATURATE16(PSHR32(sum, SIG_SHIFT));
}
#else
for (i=0;i<N-3;i+=4)
{
opus_val32 sum[4]={0,0,0,0};
- xcorr_kernel(rnum, x+i, sum, ord, arch);
- _y[i ] = SATURATE16(ADD32(EXTEND32(_x[i ]), PSHR32(sum[0], SIG_SHIFT)));
- _y[i+1] = SATURATE16(ADD32(EXTEND32(_x[i+1]), PSHR32(sum[1], SIG_SHIFT)));
- _y[i+2] = SATURATE16(ADD32(EXTEND32(_x[i+2]), PSHR32(sum[2], SIG_SHIFT)));
- _y[i+3] = SATURATE16(ADD32(EXTEND32(_x[i+3]), PSHR32(sum[3], SIG_SHIFT)));
+ xcorr_kernel(rnum, x+i-ord, sum, ord, arch);
+ y[i ] = SATURATE16(ADD32(EXTEND32(x[i ]), PSHR32(sum[0], SIG_SHIFT)));
+ y[i+1] = SATURATE16(ADD32(EXTEND32(x[i+1]), PSHR32(sum[1], SIG_SHIFT)));
+ y[i+2] = SATURATE16(ADD32(EXTEND32(x[i+2]), PSHR32(sum[2], SIG_SHIFT)));
+ y[i+3] = SATURATE16(ADD32(EXTEND32(x[i+3]), PSHR32(sum[3], SIG_SHIFT)));
}
for (;i<N;i++)
{
opus_val32 sum = 0;
for (j=0;j<ord;j++)
- sum = MAC16_16(sum,rnum[j],x[i+j]);
- _y[i] = SATURATE16(ADD32(EXTEND32(_x[i]), PSHR32(sum, SIG_SHIFT)));
+ sum = MAC16_16(sum,rnum[j],x[i+j-ord]);
+ y[i] = SATURATE16(ADD32(EXTEND32(x[i]), PSHR32(sum, SIG_SHIFT)));
}
#endif
RESTORE_STACK;
diff --git a/celt/celt_lpc.h b/celt/celt_lpc.h
index 323459e..a4c5fd6 100644
--- a/celt/celt_lpc.h
+++ b/celt/celt_lpc.h
@@ -45,12 +45,11 @@ void celt_fir_c(
opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch);
#if !defined(OVERRIDE_CELT_FIR)
-#define celt_fir(x, num, y, N, ord, mem, arch) \
- (celt_fir_c(x, num, y, N, ord, mem, arch))
+#define celt_fir(x, num, y, N, ord, arch) \
+ (celt_fir_c(x, num, y, N, ord, arch))
#endif
void celt_iir(const opus_val32 *x,
diff --git a/celt/x86/celt_lpc_sse.c b/celt/x86/celt_lpc_sse.c
index 67e5592..12a9b0e 100644
--- a/celt/x86/celt_lpc_sse.c
+++ b/celt/x86/celt_lpc_sse.c
@@ -40,63 +40,32 @@
#if defined(FIXED_POINT)
-void celt_fir_sse4_1(const opus_val16 *_x,
+void celt_fir_sse4_1(const opus_val16 *x,
const opus_val16 *num,
- opus_val16 *_y,
+ opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch)
{
int i,j;
VARDECL(opus_val16, rnum);
- VARDECL(opus_val16, x);
__m128i vecNoA;
opus_int32 noA ;
SAVE_STACK;
ALLOC(rnum, ord, opus_val16);
- ALLOC(x, N+ord, opus_val16);
for(i=0;i<ord;i++)
rnum[i] = num[ord-i-1];
- for(i=0;i<ord;i++)
- x[i] = mem[ord-i-1];
-
- for (i=0;i<N-7;i+=8)
- {
- x[i+ord ]=_x[i ];
- x[i+ord+1]=_x[i+1];
- x[i+ord+2]=_x[i+2];
- x[i+ord+3]=_x[i+3];
- x[i+ord+4]=_x[i+4];
- x[i+ord+5]=_x[i+5];
- x[i+ord+6]=_x[i+6];
- x[i+ord+7]=_x[i+7];
- }
-
- for (;i<N-3;i+=4)
- {
- x[i+ord ]=_x[i ];
- x[i+ord+1]=_x[i+1];
- x[i+ord+2]=_x[i+2];
- x[i+ord+3]=_x[i+3];
- }
-
- for (;i<N;i++)
- x[i+ord]=_x[i];
-
- for(i=0;i<ord;i++)
- mem[i] = _x[N-i-1];
#ifdef SMALL_FOOTPRINT
for (i=0;i<N;i++)
{
- opus_val32 sum = SHL32(EXTEND32(_x[i]), SIG_SHIFT);
+ opus_val32 sum = SHL32(EXTEND32(x[i]), SIG_SHIFT);
for (j=0;j<ord;j++)
{
- sum = MAC16_16(sum,rnum[j],x[i+j]);
+ sum = MAC16_16(sum,rnum[j],x[i+j-ord]);
}
- _y[i] = SATURATE16(PSHR32(sum, SIG_SHIFT));
+ y[i] = SATURATE16(PSHR32(sum, SIG_SHIFT));
}
#else
noA = EXTEND32(1) << SIG_SHIFT >> 1;
@@ -107,22 +76,22 @@ void celt_fir_sse4_1(const opus_val16 *_x,
opus_val32 sums[4] = {0};
__m128i vecSum, vecX;
- xcorr_kernel(rnum, x+i, sums, ord, arch);
+ xcorr_kernel(rnum, x+i-ord, sums, ord, arch);
vecSum = _mm_loadu_si128((__m128i *)sums);
vecSum = _mm_add_epi32(vecSum, vecNoA);
vecSum = _mm_srai_epi32(vecSum, SIG_SHIFT);
- vecX = OP_CVTEPI16_EPI32_M64(_x + i);
+ vecX = OP_CVTEPI16_EPI32_M64(x + i);
vecSum = _mm_add_epi32(vecSum, vecX);
vecSum = _mm_packs_epi32(vecSum, vecSum);
- _mm_storel_epi64((__m128i *)(_y + i), vecSum);
+ _mm_storel_epi64((__m128i *)(y + i), vecSum);
}
for (;i<N;i++)
{
opus_val32 sum = 0;
for (j=0;j<ord;j++)
- sum = MAC16_16(sum, rnum[j], x[i + j]);
- _y[i] = SATURATE16(ADD32(EXTEND32(_x[i]), PSHR32(sum, SIG_SHIFT)));
+ sum = MAC16_16(sum, rnum[j], x[i+j-ord]);
+ y[i] = SATURATE16(ADD32(EXTEND32(x[i]), PSHR32(sum, SIG_SHIFT)));
}
#endif
diff --git a/celt/x86/celt_lpc_sse.h b/celt/x86/celt_lpc_sse.h
index c5ec796..7d1ecf7 100644
--- a/celt/x86/celt_lpc_sse.h
+++ b/celt/x86/celt_lpc_sse.h
@@ -41,12 +41,11 @@ void celt_fir_sse4_1(
opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch);
#if defined(OPUS_X86_PRESUME_SSE4_1)
-#define celt_fir(x, num, y, N, ord, mem, arch) \
- ((void)arch, celt_fir_sse4_1(x, num, y, N, ord, mem, arch))
+#define celt_fir(x, num, y, N, ord, arch) \
+ ((void)arch, celt_fir_sse4_1(x, num, y, N, ord, arch))
#else
@@ -56,11 +55,10 @@ extern void (*const CELT_FIR_IMPL[OPUS_ARCHMASK + 1])(
opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch);
-# define celt_fir(x, num, y, N, ord, mem, arch) \
- ((*CELT_FIR_IMPL[(arch) & OPUS_ARCHMASK])(x, num, y, N, ord, mem, arch))
+# define celt_fir(x, num, y, N, ord, arch) \
+ ((*CELT_FIR_IMPL[(arch) & OPUS_ARCHMASK])(x, num, y, N, ord, arch))
#endif
#endif
diff --git a/celt/x86/x86_celt_map.c b/celt/x86/x86_celt_map.c
index 47ba41b..5a1f5f9 100644
--- a/celt/x86/x86_celt_map.c
+++ b/celt/x86/x86_celt_map.c
@@ -46,7 +46,6 @@ void (*const CELT_FIR_IMPL[OPUS_ARCHMASK + 1])(
opus_val16 *y,
int N,
int ord,
- opus_val16 *mem,
int arch
) = {
celt_fir_c, /* non-sse */
diff --git a/silk/LPC_analysis_filter.c b/silk/LPC_analysis_filter.c
index 2090667..5aeee4c 100644
--- a/silk/LPC_analysis_filter.c
+++ b/silk/LPC_analysis_filter.c
@@ -50,7 +50,6 @@ void silk_LPC_analysis_filter(
{
opus_int j;
#ifdef FIXED_POINT
- opus_int16 mem[SILK_MAX_ORDER_LPC];
opus_int16 num[SILK_MAX_ORDER_LPC];
#else
int ix;
@@ -67,10 +66,7 @@ void silk_LPC_analysis_filter(
for ( j = 0; j < d; j++ ) {
num[ j ] = -B[ j ];
}
- for (j=0;j<d;j++) {
- mem[ j ] = in[ d - j - 1 ];
- }
- celt_fir( in + d, num, out + d, len - d, d, mem, arch );
+ celt_fir( in + d, num, out + d, len - d, d, arch );
for ( j = 0; j < d; j++ ) {
out[ j ] = 0;
}
--
2.8.0.rc3.226.g39d4020
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