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ffmpeg.wasm-core
Commit d43fb4e8 authored by Michael Niedermayer's avatar Michael Niedermayer
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move identical code into its own function 

intXY_t -> int_fastXY_t

Originally committed as revision 2455 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 237e4938
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Showing with 68 additions and 185 deletions
libavcodec/faandct.c
View file @ d43fb4e8
......@@ -70,16 +70,13 @@ B6*B0, B6*B1, B6*B2, B6*B3, B6*B4, B6*B5, B6*B6, B6*B7,
B7*B0, B7*B1, B7*B2, B7*B3, B7*B4, B7*B5, B7*B6, B7*B7,
};
void ff_faandct(DCTELEM * data)
static always_inline void row_fdct(FLOAT temp[64], DCTELEM * data)
{
FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
FLOAT tmp10, tmp11, tmp12, tmp13;
FLOAT z1, z2, z3, z4, z5, z11, z13;
FLOAT temp[64];
int i;
emms_c();
for (i=0; i<8*8; i+=8) {
tmp0= data[0 + i] + data[7 + i];
tmp7= data[0 + i] - data[7 + i];
......@@ -118,7 +115,20 @@ void ff_faandct(DCTELEM * data)
temp[3 + i]= z13 - z2;
temp[1 + i]= z11 + z4;
temp[7 + i]= z11 - z4;
}
}
}
void ff_faandct(DCTELEM * data)
{
FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
FLOAT tmp10, tmp11, tmp12, tmp13;
FLOAT z1, z2, z3, z4, z5, z11, z13;
FLOAT temp[64];
int i;
emms_c();
row_fdct(temp, data);
for (i=0; i<8; i++) {
tmp0= temp[8*0 + i] + temp[8*7 + i];
......@@ -165,51 +175,13 @@ void ff_faandct248(DCTELEM * data)
{
FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
FLOAT tmp10, tmp11, tmp12, tmp13;
FLOAT z1, z2, z3, z4, z5, z11, z13;
FLOAT z1;
FLOAT temp[64];
int i;
emms_c();
for (i=0; i<8*8; i+=8) {
tmp0= data[0 + i] + data[7 + i];
tmp7= data[0 + i] - data[7 + i];
tmp1= data[1 + i] + data[6 + i];
tmp6= data[1 + i] - data[6 + i];
tmp2= data[2 + i] + data[5 + i];
tmp5= data[2 + i] - data[5 + i];
tmp3= data[3 + i] + data[4 + i];
tmp4= data[3 + i] - data[4 + i];
tmp10= tmp0 + tmp3;
tmp13= tmp0 - tmp3;
tmp11= tmp1 + tmp2;
tmp12= tmp1 - tmp2;
temp[0 + i]= tmp10 + tmp11;
temp[4 + i]= tmp10 - tmp11;
z1= (tmp12 + tmp13)*A1;
temp[2 + i]= tmp13 + z1;
temp[6 + i]= tmp13 - z1;
tmp10= tmp4 + tmp5;
tmp11= tmp5 + tmp6;
tmp12= tmp6 + tmp7;
z5= (tmp10 - tmp12) * A5;
z2= tmp10*A2 + z5;
z4= tmp12*A4 + z5;
z3= tmp11*A1;
z11= tmp7 + z3;
z13= tmp7 - z3;
temp[5 + i]= z13 + z2;
temp[3 + i]= z13 - z2;
temp[1 + i]= z11 + z4;
temp[7 + i]= z11 - z4;
}
row_fdct(temp, data);
for (i=0; i<8; i++) {
tmp0 = temp[8*0 + i] + temp[8*1 + i];
......
libavcodec/jfdctfst.c
View file @ d43fb4e8
......@@ -112,17 +112,10 @@
#define MULTIPLY(var,const) ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
/*
* Perform the forward DCT on one block of samples.
*/
GLOBAL(void)
fdct_ifast (DCTELEM * data)
{
DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
DCTELEM tmp10, tmp11, tmp12, tmp13;
DCTELEM z1, z2, z3, z4, z5, z11, z13;
static always_inline void row_fdct(DCTELEM * data){
int_fast16_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast16_t tmp10, tmp11, tmp12, tmp13;
int_fast16_t z1, z2, z3, z4, z5, z11, z13;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
......@@ -176,7 +169,24 @@ fdct_ifast (DCTELEM * data)
dataptr += DCTSIZE; /* advance pointer to next row */
}
}
/*
* Perform the forward DCT on one block of samples.
*/
GLOBAL(void)
fdct_ifast (DCTELEM * data)
{
int_fast16_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast16_t tmp10, tmp11, tmp12, tmp13;
int_fast16_t z1, z2, z3, z4, z5, z11, z13;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
row_fdct(data);
/* Pass 2: process columns. */
dataptr = data;
......@@ -235,63 +245,15 @@ fdct_ifast (DCTELEM * data)
GLOBAL(void)
fdct_ifast248 (DCTELEM * data)
{
DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
DCTELEM tmp10, tmp11, tmp12, tmp13;
DCTELEM z1, z2, z3, z4, z5, z11, z13;
int_fast16_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast16_t tmp10, tmp11, tmp12, tmp13;
int_fast16_t z1;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
/* Pass 1: process rows. */
dataptr = data;
for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
tmp0 = dataptr[0] + dataptr[7];
tmp7 = dataptr[0] - dataptr[7];
tmp1 = dataptr[1] + dataptr[6];
tmp6 = dataptr[1] - dataptr[6];
tmp2 = dataptr[2] + dataptr[5];
tmp5 = dataptr[2] - dataptr[5];
tmp3 = dataptr[3] + dataptr[4];
tmp4 = dataptr[3] - dataptr[4];
/* Even part */
tmp10 = tmp0 + tmp3; /* phase 2 */
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
dataptr[0] = tmp10 + tmp11; /* phase 3 */
dataptr[4] = tmp10 - tmp11;
z1 = MULTIPLY(tmp12 + tmp13, FIX_0_707106781); /* c4 */
dataptr[2] = tmp13 + z1; /* phase 5 */
dataptr[6] = tmp13 - z1;
/* Odd part */
tmp10 = tmp4 + tmp5; /* phase 2 */
tmp11 = tmp5 + tmp6;
tmp12 = tmp6 + tmp7;
/* The rotator is modified from fig 4-8 to avoid extra negations. */
z5 = MULTIPLY(tmp10 - tmp12, FIX_0_382683433); /* c6 */
z2 = MULTIPLY(tmp10, FIX_0_541196100) + z5; /* c2-c6 */
z4 = MULTIPLY(tmp12, FIX_1_306562965) + z5; /* c2+c6 */
z3 = MULTIPLY(tmp11, FIX_0_707106781); /* c4 */
z11 = tmp7 + z3; /* phase 5 */
z13 = tmp7 - z3;
dataptr[5] = z13 + z2; /* phase 6 */
dataptr[3] = z13 - z2;
dataptr[1] = z11 + z4;
dataptr[7] = z11 - z4;
dataptr += DCTSIZE; /* advance pointer to next row */
}
row_fdct(data);
/* Pass 2: process columns. */
dataptr = data;
......
libavcodec/jfdctint.c
View file @ d43fb4e8
......@@ -148,16 +148,10 @@
#endif
/*
* Perform the forward DCT on one block of samples.
*/
GLOBAL(void)
ff_jpeg_fdct_islow (DCTELEM * data)
{
int32_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int32_t tmp10, tmp11, tmp12, tmp13;
int32_t z1, z2, z3, z4, z5;
static always_inline void row_fdct(DCTELEM * data){
int_fast32_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast32_t tmp10, tmp11, tmp12, tmp13;
int_fast32_t z1, z2, z3, z4, z5;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
......@@ -225,6 +219,23 @@ ff_jpeg_fdct_islow (DCTELEM * data)
dataptr += DCTSIZE; /* advance pointer to next row */
}
}
/*
* Perform the forward DCT on one block of samples.
*/
GLOBAL(void)
ff_jpeg_fdct_islow (DCTELEM * data)
{
int_fast32_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast32_t tmp10, tmp11, tmp12, tmp13;
int_fast32_t z1, z2, z3, z4, z5;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
row_fdct(data);
/* Pass 2: process columns.
* We remove the PASS1_BITS scaling, but leave the results scaled up
......@@ -304,76 +315,14 @@ ff_jpeg_fdct_islow (DCTELEM * data)
GLOBAL(void)
ff_fdct248_islow (DCTELEM * data)
{
int32_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int32_t tmp10, tmp11, tmp12, tmp13;
int32_t z1, z2, z3, z4, z5;
int_fast32_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int_fast32_t tmp10, tmp11, tmp12, tmp13;
int_fast32_t z1;
DCTELEM *dataptr;
int ctr;
SHIFT_TEMPS
/* Pass 1: process rows. */
/* Note results are scaled up by sqrt(8) compared to a true DCT; */
/* furthermore, we scale the results by 2**PASS1_BITS. */
dataptr = data;
for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
tmp0 = dataptr[0] + dataptr[7];
tmp7 = dataptr[0] - dataptr[7];
tmp1 = dataptr[1] + dataptr[6];
tmp6 = dataptr[1] - dataptr[6];
tmp2 = dataptr[2] + dataptr[5];
tmp5 = dataptr[2] - dataptr[5];
tmp3 = dataptr[3] + dataptr[4];
tmp4 = dataptr[3] - dataptr[4];
/* Even part per LL&M figure 1 --- note that published figure is faulty;
* rotator "sqrt(2)*c1" should be "sqrt(2)*c6".
*/
tmp10 = tmp0 + tmp3;
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
dataptr[0] = (DCTELEM) ((tmp10 + tmp11) << PASS1_BITS);
dataptr[4] = (DCTELEM) ((tmp10 - tmp11) << PASS1_BITS);
z1 = MULTIPLY(tmp12 + tmp13, FIX_0_541196100);
dataptr[2] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp13, FIX_0_765366865),
CONST_BITS-PASS1_BITS);
dataptr[6] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp12, - FIX_1_847759065),
CONST_BITS-PASS1_BITS);
/* Odd part per figure 8 --- note paper omits factor of sqrt(2).
* cK represents cos(K*pi/16).
* i0..i3 in the paper are tmp4..tmp7 here.
*/
z1 = tmp4 + tmp7;
z2 = tmp5 + tmp6;
z3 = tmp4 + tmp6;
z4 = tmp5 + tmp7;
z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
tmp4 = MULTIPLY(tmp4, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
tmp5 = MULTIPLY(tmp5, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
tmp6 = MULTIPLY(tmp6, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
tmp7 = MULTIPLY(tmp7, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
z3 += z5;
z4 += z5;
dataptr[7] = (DCTELEM) DESCALE(tmp4 + z1 + z3, CONST_BITS-PASS1_BITS);
dataptr[5] = (DCTELEM) DESCALE(tmp5 + z2 + z4, CONST_BITS-PASS1_BITS);
dataptr[3] = (DCTELEM) DESCALE(tmp6 + z2 + z3, CONST_BITS-PASS1_BITS);
dataptr[1] = (DCTELEM) DESCALE(tmp7 + z1 + z4, CONST_BITS-PASS1_BITS);
dataptr += DCTSIZE; /* advance pointer to next row */
}
row_fdct(data);
/* Pass 2: process columns.
* We remove the PASS1_BITS scaling, but leave the results scaled up
......
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