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authorMichael Niedermayer <michaelni@gmx.at>2004-09-26 17:36:53 +0000
committerMichael Niedermayer <michaelni@gmx.at>2004-09-26 17:36:53 +0000
commitf06afd698bf59fcf536dc578e0df16e832b56ff5 (patch)
tree321cf8f19f2a4fb4d656f56d317d6a46802229eb /libavcodec/jrevdct.c
parentaffbf0435a8aeb71f22d1cc2259c54cf1ac7d2c4 (diff)
porting optimizations from 4x4 dct to 8x8
Originally committed as revision 3515 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/jrevdct.c')
-rw-r--r--libavcodec/jrevdct.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/libavcodec/jrevdct.c b/libavcodec/jrevdct.c
index 728d25198a..c08d1241f8 100644
--- a/libavcodec/jrevdct.c
+++ b/libavcodec/jrevdct.c
@@ -235,9 +235,7 @@ void j_rev_dct(DCTBLOCK data)
/* The rotator is sqrt(2)*c(-6). */
{
if (d6) {
- if (d4) {
if (d2) {
- if (d0) {
/* d0 != 0, d2 != 0, d4 != 0, d6 != 0 */
z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
@@ -250,21 +248,7 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 != 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
} else {
- if (d0) {
/* d0 != 0, d2 == 0, d4 != 0, d6 != 0 */
tmp2 = MULTIPLY(-d6, FIX_1_306562965);
tmp3 = MULTIPLY(d6, FIX_0_541196100);
@@ -276,72 +260,9 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 == 0, d4 != 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
- }
- } else {
- if (d2) {
- if (d0) {
- /* d0 != 0, d2 != 0, d4 == 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 == 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
- } else {
- if (d0) {
- /* d0 != 0, d2 == 0, d4 == 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 == 0, d4 == 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
}
- }
} else {
- if (d4) {
if (d2) {
- if (d0) {
/* d0 != 0, d2 != 0, d4 != 0, d6 == 0 */
tmp2 = MULTIPLY(d2, FIX_0_541196100);
tmp3 = MULTIPLY(d2, FIX_1_306562965);
@@ -353,62 +274,11 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 != 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
} else {
- if (d0) {
/* d0 != 0, d2 == 0, d4 != 0, d6 == 0 */
tmp10 = tmp13 = (d0 + d4) << CONST_BITS;
tmp11 = tmp12 = (d0 - d4) << CONST_BITS;
- } else {
- /* d0 == 0, d2 == 0, d4 != 0, d6 == 0 */
- tmp10 = tmp13 = d4 << CONST_BITS;
- tmp11 = tmp12 = -tmp10;
- }
}
- } else {
- if (d2) {
- if (d0) {
- /* d0 != 0, d2 != 0, d4 == 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 == 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
- } else {
- if (d0) {
- /* d0 != 0, d2 == 0, d4 == 0, d6 == 0 */
- tmp10 = tmp13 = tmp11 = tmp12 = d0 << CONST_BITS;
- } else {
- /* d0 == 0, d2 == 0, d4 == 0, d6 == 0 */
- tmp10 = tmp13 = tmp11 = tmp12 = 0;
- }
- }
- }
}
/* Odd part per figure 8; the matrix is unitary and hence its
@@ -711,9 +581,7 @@ void j_rev_dct(DCTBLOCK data)
/* Even part: reverse the even part of the forward DCT. */
/* The rotator is sqrt(2)*c(-6). */
if (d6) {
- if (d4) {
if (d2) {
- if (d0) {
/* d0 != 0, d2 != 0, d4 != 0, d6 != 0 */
z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
@@ -726,21 +594,7 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 != 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
} else {
- if (d0) {
/* d0 != 0, d2 == 0, d4 != 0, d6 != 0 */
tmp2 = MULTIPLY(-d6, FIX_1_306562965);
tmp3 = MULTIPLY(d6, FIX_0_541196100);
@@ -752,72 +606,9 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 == 0, d4 != 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
- }
- } else {
- if (d2) {
- if (d0) {
- /* d0 != 0, d2 != 0, d4 == 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 == 0, d6 != 0 */
- z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
- tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
- tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
- } else {
- if (d0) {
- /* d0 != 0, d2 == 0, d4 == 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 == 0, d4 == 0, d6 != 0 */
- tmp2 = MULTIPLY(-d6, FIX_1_306562965);
- tmp3 = MULTIPLY(d6, FIX_0_541196100);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
}
- }
} else {
- if (d4) {
if (d2) {
- if (d0) {
/* d0 != 0, d2 != 0, d4 != 0, d6 == 0 */
tmp2 = MULTIPLY(d2, FIX_0_541196100);
tmp3 = MULTIPLY(d2, FIX_1_306562965);
@@ -829,62 +620,11 @@ void j_rev_dct(DCTBLOCK data)
tmp13 = tmp0 - tmp3;
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 != 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp0 = d4 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp2 - tmp0;
- tmp12 = -(tmp0 + tmp2);
- }
} else {
- if (d0) {
/* d0 != 0, d2 == 0, d4 != 0, d6 == 0 */
tmp10 = tmp13 = (d0 + d4) << CONST_BITS;
tmp11 = tmp12 = (d0 - d4) << CONST_BITS;
- } else {
- /* d0 == 0, d2 == 0, d4 != 0, d6 == 0 */
- tmp10 = tmp13 = d4 << CONST_BITS;
- tmp11 = tmp12 = -tmp10;
- }
}
- } else {
- if (d2) {
- if (d0) {
- /* d0 != 0, d2 != 0, d4 == 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp0 = d0 << CONST_BITS;
-
- tmp10 = tmp0 + tmp3;
- tmp13 = tmp0 - tmp3;
- tmp11 = tmp0 + tmp2;
- tmp12 = tmp0 - tmp2;
- } else {
- /* d0 == 0, d2 != 0, d4 == 0, d6 == 0 */
- tmp2 = MULTIPLY(d2, FIX_0_541196100);
- tmp3 = MULTIPLY(d2, FIX_1_306562965);
-
- tmp10 = tmp3;
- tmp13 = -tmp3;
- tmp11 = tmp2;
- tmp12 = -tmp2;
- }
- } else {
- if (d0) {
- /* d0 != 0, d2 == 0, d4 == 0, d6 == 0 */
- tmp10 = tmp13 = tmp11 = tmp12 = d0 << CONST_BITS;
- } else {
- /* d0 == 0, d2 == 0, d4 == 0, d6 == 0 */
- tmp10 = tmp13 = tmp11 = tmp12 = 0;
- }
- }
- }
}
/* Odd part per figure 8; the matrix is unitary and hence its
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 07:40:00 +0000