diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /media/ffvpx/libavcodec/faandct.c | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/faandct.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/faandct.c b/media/ffvpx/libavcodec/faandct.c new file mode 100644 index 0000000000..38c392bbae --- /dev/null +++ b/media/ffvpx/libavcodec/faandct.c @@ -0,0 +1,215 @@ +/* + * Floating point AAN DCT + * this implementation is based upon the IJG integer AAN DCT (see jfdctfst.c) + * + * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> + * Copyright (c) 2003 Roman Shaposhnik + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/** + * @file + * @brief + * Floating point AAN DCT + * @author Michael Niedermayer <michaelni@gmx.at> + */ + +#include "faandct.h" +#include "libavutil/internal.h" +#include "libavutil/libm.h" + +typedef float FLOAT; + +/* numbers generated by arbitrary precision arithmetic followed by truncation +to 36 fractional digits (enough for a 128-bit IEEE quad, see /usr/include/math.h +for this approach). Unfortunately, long double is not always available correctly, +e.g ppc has issues. +TODO: add L suffixes when ppc and toolchains sort out their stuff. +*/ +#define B0 1.000000000000000000000000000000000000 +#define B1 0.720959822006947913789091890943021267 // (cos(pi*1/16)sqrt(2))^-1 +#define B2 0.765366864730179543456919968060797734 // (cos(pi*2/16)sqrt(2))^-1 +#define B3 0.850430094767256448766702844371412325 // (cos(pi*3/16)sqrt(2))^-1 +#define B4 1.000000000000000000000000000000000000 // (cos(pi*4/16)sqrt(2))^-1 +#define B5 1.272758580572833938461007018281767032 // (cos(pi*5/16)sqrt(2))^-1 +#define B6 1.847759065022573512256366378793576574 // (cos(pi*6/16)sqrt(2))^-1 +#define B7 3.624509785411551372409941227504289587 // (cos(pi*7/16)sqrt(2))^-1 + +#define A1 M_SQRT1_2 // cos(pi*4/16) +#define A2 0.54119610014619698435 // cos(pi*6/16)sqrt(2) +#define A5 0.38268343236508977170 // cos(pi*6/16) +#define A4 1.30656296487637652774 // cos(pi*2/16)sqrt(2) + +static const FLOAT postscale[64]={ +B0*B0, B0*B1, B0*B2, B0*B3, B0*B4, B0*B5, B0*B6, B0*B7, +B1*B0, B1*B1, B1*B2, B1*B3, B1*B4, B1*B5, B1*B6, B1*B7, +B2*B0, B2*B1, B2*B2, B2*B3, B2*B4, B2*B5, B2*B6, B2*B7, +B3*B0, B3*B1, B3*B2, B3*B3, B3*B4, B3*B5, B3*B6, B3*B7, +B4*B0, B4*B1, B4*B2, B4*B3, B4*B4, B4*B5, B4*B6, B4*B7, +B5*B0, B5*B1, B5*B2, B5*B3, B5*B4, B5*B5, B5*B6, B5*B7, +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, +}; + +static av_always_inline void row_fdct(FLOAT temp[64], int16_t *data) +{ + FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7; + FLOAT tmp10, tmp11, tmp12, tmp13; + FLOAT z2, z4, z11, z13; + int i; + + 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; + + tmp12 += tmp13; + tmp12 *= A1; + temp[2 + i]= tmp13 + tmp12; + temp[6 + i]= tmp13 - tmp12; + + tmp4 += tmp5; + tmp5 += tmp6; + tmp6 += tmp7; + + z2= tmp4*(A2+A5) - tmp6*A5; + z4= tmp6*(A4-A5) + tmp4*A5; + + tmp5*=A1; + + z11= tmp7 + tmp5; + z13= tmp7 - tmp5; + + temp[5 + i]= z13 + z2; + temp[3 + i]= z13 - z2; + temp[1 + i]= z11 + z4; + temp[7 + i]= z11 - z4; + } +} + +void ff_faandct(int16_t *data) +{ + FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7; + FLOAT tmp10, tmp11, tmp12, tmp13; + FLOAT z2, z4, 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]; + tmp7= temp[8*0 + i] - temp[8*7 + i]; + tmp1= temp[8*1 + i] + temp[8*6 + i]; + tmp6= temp[8*1 + i] - temp[8*6 + i]; + tmp2= temp[8*2 + i] + temp[8*5 + i]; + tmp5= temp[8*2 + i] - temp[8*5 + i]; + tmp3= temp[8*3 + i] + temp[8*4 + i]; + tmp4= temp[8*3 + i] - temp[8*4 + i]; + + tmp10= tmp0 + tmp3; + tmp13= tmp0 - tmp3; + tmp11= tmp1 + tmp2; + tmp12= tmp1 - tmp2; + + data[8*0 + i]= lrintf(postscale[8*0 + i] * (tmp10 + tmp11)); + data[8*4 + i]= lrintf(postscale[8*4 + i] * (tmp10 - tmp11)); + + tmp12 += tmp13; + tmp12 *= A1; + data[8*2 + i]= lrintf(postscale[8*2 + i] * (tmp13 + tmp12)); + data[8*6 + i]= lrintf(postscale[8*6 + i] * (tmp13 - tmp12)); + + tmp4 += tmp5; + tmp5 += tmp6; + tmp6 += tmp7; + + z2= tmp4*(A2+A5) - tmp6*A5; + z4= tmp6*(A4-A5) + tmp4*A5; + + tmp5*=A1; + + z11= tmp7 + tmp5; + z13= tmp7 - tmp5; + + data[8*5 + i]= lrintf(postscale[8*5 + i] * (z13 + z2)); + data[8*3 + i]= lrintf(postscale[8*3 + i] * (z13 - z2)); + data[8*1 + i]= lrintf(postscale[8*1 + i] * (z11 + z4)); + data[8*7 + i]= lrintf(postscale[8*7 + i] * (z11 - z4)); + } +} + +void ff_faandct248(int16_t *data) +{ + FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7; + FLOAT tmp10, tmp11, tmp12, tmp13; + FLOAT temp[64]; + int i; + + emms_c(); + + row_fdct(temp, data); + + for (i=0; i<8; i++) { + tmp0 = temp[8*0 + i] + temp[8*1 + i]; + tmp1 = temp[8*2 + i] + temp[8*3 + i]; + tmp2 = temp[8*4 + i] + temp[8*5 + i]; + tmp3 = temp[8*6 + i] + temp[8*7 + i]; + tmp4 = temp[8*0 + i] - temp[8*1 + i]; + tmp5 = temp[8*2 + i] - temp[8*3 + i]; + tmp6 = temp[8*4 + i] - temp[8*5 + i]; + tmp7 = temp[8*6 + i] - temp[8*7 + i]; + + tmp10 = tmp0 + tmp3; + tmp11 = tmp1 + tmp2; + tmp12 = tmp1 - tmp2; + tmp13 = tmp0 - tmp3; + + data[8*0 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11)); + data[8*4 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11)); + + tmp12 += tmp13; + tmp12 *= A1; + data[8*2 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12)); + data[8*6 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12)); + + tmp10 = tmp4 + tmp7; + tmp11 = tmp5 + tmp6; + tmp12 = tmp5 - tmp6; + tmp13 = tmp4 - tmp7; + + data[8*1 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11)); + data[8*5 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11)); + + tmp12 += tmp13; + tmp12 *= A1; + data[8*3 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12)); + data[8*7 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12)); + } +} |