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-rw-r--r--media/libvpx/libvpx/vp9/encoder/vp9_dct.c687
1 files changed, 687 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_dct.c b/media/libvpx/libvpx/vp9/encoder/vp9_dct.c
new file mode 100644
index 0000000000..2f42c6afc2
--- /dev/null
+++ b/media/libvpx/libvpx/vp9/encoder/vp9_dct.c
@@ -0,0 +1,687 @@
+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h>
+#include <math.h>
+
+#include "./vp9_rtcd.h"
+#include "./vpx_config.h"
+#include "./vpx_dsp_rtcd.h"
+
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/fwd_txfm.h"
+#include "vpx_ports/mem.h"
+
+static void fdct4(const tran_low_t *input, tran_low_t *output) {
+ tran_high_t step[4];
+ tran_high_t temp1, temp2;
+
+ step[0] = input[0] + input[3];
+ step[1] = input[1] + input[2];
+ step[2] = input[1] - input[2];
+ step[3] = input[0] - input[3];
+
+ temp1 = (step[0] + step[1]) * cospi_16_64;
+ temp2 = (step[0] - step[1]) * cospi_16_64;
+ output[0] = (tran_low_t)fdct_round_shift(temp1);
+ output[2] = (tran_low_t)fdct_round_shift(temp2);
+ temp1 = step[2] * cospi_24_64 + step[3] * cospi_8_64;
+ temp2 = -step[2] * cospi_8_64 + step[3] * cospi_24_64;
+ output[1] = (tran_low_t)fdct_round_shift(temp1);
+ output[3] = (tran_low_t)fdct_round_shift(temp2);
+}
+
+static void fdct8(const tran_low_t *input, tran_low_t *output) {
+ tran_high_t s0, s1, s2, s3, s4, s5, s6, s7; // canbe16
+ tran_high_t t0, t1, t2, t3; // needs32
+ tran_high_t x0, x1, x2, x3; // canbe16
+
+ // stage 1
+ s0 = input[0] + input[7];
+ s1 = input[1] + input[6];
+ s2 = input[2] + input[5];
+ s3 = input[3] + input[4];
+ s4 = input[3] - input[4];
+ s5 = input[2] - input[5];
+ s6 = input[1] - input[6];
+ s7 = input[0] - input[7];
+
+ // fdct4(step, step);
+ x0 = s0 + s3;
+ x1 = s1 + s2;
+ x2 = s1 - s2;
+ x3 = s0 - s3;
+ t0 = (x0 + x1) * cospi_16_64;
+ t1 = (x0 - x1) * cospi_16_64;
+ t2 = x2 * cospi_24_64 + x3 * cospi_8_64;
+ t3 = -x2 * cospi_8_64 + x3 * cospi_24_64;
+ output[0] = (tran_low_t)fdct_round_shift(t0);
+ output[2] = (tran_low_t)fdct_round_shift(t2);
+ output[4] = (tran_low_t)fdct_round_shift(t1);
+ output[6] = (tran_low_t)fdct_round_shift(t3);
+
+ // Stage 2
+ t0 = (s6 - s5) * cospi_16_64;
+ t1 = (s6 + s5) * cospi_16_64;
+ t2 = (tran_low_t)fdct_round_shift(t0);
+ t3 = (tran_low_t)fdct_round_shift(t1);
+
+ // Stage 3
+ x0 = s4 + t2;
+ x1 = s4 - t2;
+ x2 = s7 - t3;
+ x3 = s7 + t3;
+
+ // Stage 4
+ t0 = x0 * cospi_28_64 + x3 * cospi_4_64;
+ t1 = x1 * cospi_12_64 + x2 * cospi_20_64;
+ t2 = x2 * cospi_12_64 + x1 * -cospi_20_64;
+ t3 = x3 * cospi_28_64 + x0 * -cospi_4_64;
+ output[1] = (tran_low_t)fdct_round_shift(t0);
+ output[3] = (tran_low_t)fdct_round_shift(t2);
+ output[5] = (tran_low_t)fdct_round_shift(t1);
+ output[7] = (tran_low_t)fdct_round_shift(t3);
+}
+
+static void fdct16(const tran_low_t in[16], tran_low_t out[16]) {
+ tran_high_t step1[8]; // canbe16
+ tran_high_t step2[8]; // canbe16
+ tran_high_t step3[8]; // canbe16
+ tran_high_t input[8]; // canbe16
+ tran_high_t temp1, temp2; // needs32
+
+ // step 1
+ input[0] = in[0] + in[15];
+ input[1] = in[1] + in[14];
+ input[2] = in[2] + in[13];
+ input[3] = in[3] + in[12];
+ input[4] = in[4] + in[11];
+ input[5] = in[5] + in[10];
+ input[6] = in[6] + in[9];
+ input[7] = in[7] + in[8];
+
+ step1[0] = in[7] - in[8];
+ step1[1] = in[6] - in[9];
+ step1[2] = in[5] - in[10];
+ step1[3] = in[4] - in[11];
+ step1[4] = in[3] - in[12];
+ step1[5] = in[2] - in[13];
+ step1[6] = in[1] - in[14];
+ step1[7] = in[0] - in[15];
+
+ // fdct8(step, step);
+ {
+ tran_high_t s0, s1, s2, s3, s4, s5, s6, s7; // canbe16
+ tran_high_t t0, t1, t2, t3; // needs32
+ tran_high_t x0, x1, x2, x3; // canbe16
+
+ // stage 1
+ s0 = input[0] + input[7];
+ s1 = input[1] + input[6];
+ s2 = input[2] + input[5];
+ s3 = input[3] + input[4];
+ s4 = input[3] - input[4];
+ s5 = input[2] - input[5];
+ s6 = input[1] - input[6];
+ s7 = input[0] - input[7];
+
+ // fdct4(step, step);
+ x0 = s0 + s3;
+ x1 = s1 + s2;
+ x2 = s1 - s2;
+ x3 = s0 - s3;
+ t0 = (x0 + x1) * cospi_16_64;
+ t1 = (x0 - x1) * cospi_16_64;
+ t2 = x3 * cospi_8_64 + x2 * cospi_24_64;
+ t3 = x3 * cospi_24_64 - x2 * cospi_8_64;
+ out[0] = (tran_low_t)fdct_round_shift(t0);
+ out[4] = (tran_low_t)fdct_round_shift(t2);
+ out[8] = (tran_low_t)fdct_round_shift(t1);
+ out[12] = (tran_low_t)fdct_round_shift(t3);
+
+ // Stage 2
+ t0 = (s6 - s5) * cospi_16_64;
+ t1 = (s6 + s5) * cospi_16_64;
+ t2 = fdct_round_shift(t0);
+ t3 = fdct_round_shift(t1);
+
+ // Stage 3
+ x0 = s4 + t2;
+ x1 = s4 - t2;
+ x2 = s7 - t3;
+ x3 = s7 + t3;
+
+ // Stage 4
+ t0 = x0 * cospi_28_64 + x3 * cospi_4_64;
+ t1 = x1 * cospi_12_64 + x2 * cospi_20_64;
+ t2 = x2 * cospi_12_64 + x1 * -cospi_20_64;
+ t3 = x3 * cospi_28_64 + x0 * -cospi_4_64;
+ out[2] = (tran_low_t)fdct_round_shift(t0);
+ out[6] = (tran_low_t)fdct_round_shift(t2);
+ out[10] = (tran_low_t)fdct_round_shift(t1);
+ out[14] = (tran_low_t)fdct_round_shift(t3);
+ }
+
+ // step 2
+ temp1 = (step1[5] - step1[2]) * cospi_16_64;
+ temp2 = (step1[4] - step1[3]) * cospi_16_64;
+ step2[2] = fdct_round_shift(temp1);
+ step2[3] = fdct_round_shift(temp2);
+ temp1 = (step1[4] + step1[3]) * cospi_16_64;
+ temp2 = (step1[5] + step1[2]) * cospi_16_64;
+ step2[4] = fdct_round_shift(temp1);
+ step2[5] = fdct_round_shift(temp2);
+
+ // step 3
+ step3[0] = step1[0] + step2[3];
+ step3[1] = step1[1] + step2[2];
+ step3[2] = step1[1] - step2[2];
+ step3[3] = step1[0] - step2[3];
+ step3[4] = step1[7] - step2[4];
+ step3[5] = step1[6] - step2[5];
+ step3[6] = step1[6] + step2[5];
+ step3[7] = step1[7] + step2[4];
+
+ // step 4
+ temp1 = step3[1] * -cospi_8_64 + step3[6] * cospi_24_64;
+ temp2 = step3[2] * cospi_24_64 + step3[5] * cospi_8_64;
+ step2[1] = fdct_round_shift(temp1);
+ step2[2] = fdct_round_shift(temp2);
+ temp1 = step3[2] * cospi_8_64 - step3[5] * cospi_24_64;
+ temp2 = step3[1] * cospi_24_64 + step3[6] * cospi_8_64;
+ step2[5] = fdct_round_shift(temp1);
+ step2[6] = fdct_round_shift(temp2);
+
+ // step 5
+ step1[0] = step3[0] + step2[1];
+ step1[1] = step3[0] - step2[1];
+ step1[2] = step3[3] + step2[2];
+ step1[3] = step3[3] - step2[2];
+ step1[4] = step3[4] - step2[5];
+ step1[5] = step3[4] + step2[5];
+ step1[6] = step3[7] - step2[6];
+ step1[7] = step3[7] + step2[6];
+
+ // step 6
+ temp1 = step1[0] * cospi_30_64 + step1[7] * cospi_2_64;
+ temp2 = step1[1] * cospi_14_64 + step1[6] * cospi_18_64;
+ out[1] = (tran_low_t)fdct_round_shift(temp1);
+ out[9] = (tran_low_t)fdct_round_shift(temp2);
+
+ temp1 = step1[2] * cospi_22_64 + step1[5] * cospi_10_64;
+ temp2 = step1[3] * cospi_6_64 + step1[4] * cospi_26_64;
+ out[5] = (tran_low_t)fdct_round_shift(temp1);
+ out[13] = (tran_low_t)fdct_round_shift(temp2);
+
+ temp1 = step1[3] * -cospi_26_64 + step1[4] * cospi_6_64;
+ temp2 = step1[2] * -cospi_10_64 + step1[5] * cospi_22_64;
+ out[3] = (tran_low_t)fdct_round_shift(temp1);
+ out[11] = (tran_low_t)fdct_round_shift(temp2);
+
+ temp1 = step1[1] * -cospi_18_64 + step1[6] * cospi_14_64;
+ temp2 = step1[0] * -cospi_2_64 + step1[7] * cospi_30_64;
+ out[7] = (tran_low_t)fdct_round_shift(temp1);
+ out[15] = (tran_low_t)fdct_round_shift(temp2);
+}
+
+static void fadst4(const tran_low_t *input, tran_low_t *output) {
+ tran_high_t x0, x1, x2, x3;
+ tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+ x0 = input[0];
+ x1 = input[1];
+ x2 = input[2];
+ x3 = input[3];
+
+ if (!(x0 | x1 | x2 | x3)) {
+ output[0] = output[1] = output[2] = output[3] = 0;
+ return;
+ }
+
+ s0 = sinpi_1_9 * x0;
+ s1 = sinpi_4_9 * x0;
+ s2 = sinpi_2_9 * x1;
+ s3 = sinpi_1_9 * x1;
+ s4 = sinpi_3_9 * x2;
+ s5 = sinpi_4_9 * x3;
+ s6 = sinpi_2_9 * x3;
+ s7 = x0 + x1 - x3;
+
+ x0 = s0 + s2 + s5;
+ x1 = sinpi_3_9 * s7;
+ x2 = s1 - s3 + s6;
+ x3 = s4;
+
+ s0 = x0 + x3;
+ s1 = x1;
+ s2 = x2 - x3;
+ s3 = x2 - x0 + x3;
+
+ // 1-D transform scaling factor is sqrt(2).
+ output[0] = (tran_low_t)fdct_round_shift(s0);
+ output[1] = (tran_low_t)fdct_round_shift(s1);
+ output[2] = (tran_low_t)fdct_round_shift(s2);
+ output[3] = (tran_low_t)fdct_round_shift(s3);
+}
+
+static void fadst8(const tran_low_t *input, tran_low_t *output) {
+ tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+ tran_high_t x0 = input[7];
+ tran_high_t x1 = input[0];
+ tran_high_t x2 = input[5];
+ tran_high_t x3 = input[2];
+ tran_high_t x4 = input[3];
+ tran_high_t x5 = input[4];
+ tran_high_t x6 = input[1];
+ tran_high_t x7 = input[6];
+
+ // stage 1
+ s0 = cospi_2_64 * x0 + cospi_30_64 * x1;
+ s1 = cospi_30_64 * x0 - cospi_2_64 * x1;
+ s2 = cospi_10_64 * x2 + cospi_22_64 * x3;
+ s3 = cospi_22_64 * x2 - cospi_10_64 * x3;
+ s4 = cospi_18_64 * x4 + cospi_14_64 * x5;
+ s5 = cospi_14_64 * x4 - cospi_18_64 * x5;
+ s6 = cospi_26_64 * x6 + cospi_6_64 * x7;
+ s7 = cospi_6_64 * x6 - cospi_26_64 * x7;
+
+ x0 = fdct_round_shift(s0 + s4);
+ x1 = fdct_round_shift(s1 + s5);
+ x2 = fdct_round_shift(s2 + s6);
+ x3 = fdct_round_shift(s3 + s7);
+ x4 = fdct_round_shift(s0 - s4);
+ x5 = fdct_round_shift(s1 - s5);
+ x6 = fdct_round_shift(s2 - s6);
+ x7 = fdct_round_shift(s3 - s7);
+
+ // stage 2
+ s0 = x0;
+ s1 = x1;
+ s2 = x2;
+ s3 = x3;
+ s4 = cospi_8_64 * x4 + cospi_24_64 * x5;
+ s5 = cospi_24_64 * x4 - cospi_8_64 * x5;
+ s6 = -cospi_24_64 * x6 + cospi_8_64 * x7;
+ s7 = cospi_8_64 * x6 + cospi_24_64 * x7;
+
+ x0 = s0 + s2;
+ x1 = s1 + s3;
+ x2 = s0 - s2;
+ x3 = s1 - s3;
+ x4 = fdct_round_shift(s4 + s6);
+ x5 = fdct_round_shift(s5 + s7);
+ x6 = fdct_round_shift(s4 - s6);
+ x7 = fdct_round_shift(s5 - s7);
+
+ // stage 3
+ s2 = cospi_16_64 * (x2 + x3);
+ s3 = cospi_16_64 * (x2 - x3);
+ s6 = cospi_16_64 * (x6 + x7);
+ s7 = cospi_16_64 * (x6 - x7);
+
+ x2 = fdct_round_shift(s2);
+ x3 = fdct_round_shift(s3);
+ x6 = fdct_round_shift(s6);
+ x7 = fdct_round_shift(s7);
+
+ output[0] = (tran_low_t)x0;
+ output[1] = (tran_low_t)-x4;
+ output[2] = (tran_low_t)x6;
+ output[3] = (tran_low_t)-x2;
+ output[4] = (tran_low_t)x3;
+ output[5] = (tran_low_t)-x7;
+ output[6] = (tran_low_t)x5;
+ output[7] = (tran_low_t)-x1;
+}
+
+static void fadst16(const tran_low_t *input, tran_low_t *output) {
+ tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8;
+ tran_high_t s9, s10, s11, s12, s13, s14, s15;
+
+ tran_high_t x0 = input[15];
+ tran_high_t x1 = input[0];
+ tran_high_t x2 = input[13];
+ tran_high_t x3 = input[2];
+ tran_high_t x4 = input[11];
+ tran_high_t x5 = input[4];
+ tran_high_t x6 = input[9];
+ tran_high_t x7 = input[6];
+ tran_high_t x8 = input[7];
+ tran_high_t x9 = input[8];
+ tran_high_t x10 = input[5];
+ tran_high_t x11 = input[10];
+ tran_high_t x12 = input[3];
+ tran_high_t x13 = input[12];
+ tran_high_t x14 = input[1];
+ tran_high_t x15 = input[14];
+
+ // stage 1
+ s0 = x0 * cospi_1_64 + x1 * cospi_31_64;
+ s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
+ s2 = x2 * cospi_5_64 + x3 * cospi_27_64;
+ s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
+ s4 = x4 * cospi_9_64 + x5 * cospi_23_64;
+ s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
+ s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
+ s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
+ s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
+ s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
+ s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
+ s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
+ s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
+ s13 = x12 * cospi_7_64 - x13 * cospi_25_64;
+ s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
+ s15 = x14 * cospi_3_64 - x15 * cospi_29_64;
+
+ x0 = fdct_round_shift(s0 + s8);
+ x1 = fdct_round_shift(s1 + s9);
+ x2 = fdct_round_shift(s2 + s10);
+ x3 = fdct_round_shift(s3 + s11);
+ x4 = fdct_round_shift(s4 + s12);
+ x5 = fdct_round_shift(s5 + s13);
+ x6 = fdct_round_shift(s6 + s14);
+ x7 = fdct_round_shift(s7 + s15);
+ x8 = fdct_round_shift(s0 - s8);
+ x9 = fdct_round_shift(s1 - s9);
+ x10 = fdct_round_shift(s2 - s10);
+ x11 = fdct_round_shift(s3 - s11);
+ x12 = fdct_round_shift(s4 - s12);
+ x13 = fdct_round_shift(s5 - s13);
+ x14 = fdct_round_shift(s6 - s14);
+ x15 = fdct_round_shift(s7 - s15);
+
+ // stage 2
+ s0 = x0;
+ s1 = x1;
+ s2 = x2;
+ s3 = x3;
+ s4 = x4;
+ s5 = x5;
+ s6 = x6;
+ s7 = x7;
+ s8 = x8 * cospi_4_64 + x9 * cospi_28_64;
+ s9 = x8 * cospi_28_64 - x9 * cospi_4_64;
+ s10 = x10 * cospi_20_64 + x11 * cospi_12_64;
+ s11 = x10 * cospi_12_64 - x11 * cospi_20_64;
+ s12 = -x12 * cospi_28_64 + x13 * cospi_4_64;
+ s13 = x12 * cospi_4_64 + x13 * cospi_28_64;
+ s14 = -x14 * cospi_12_64 + x15 * cospi_20_64;
+ s15 = x14 * cospi_20_64 + x15 * cospi_12_64;
+
+ x0 = s0 + s4;
+ x1 = s1 + s5;
+ x2 = s2 + s6;
+ x3 = s3 + s7;
+ x4 = s0 - s4;
+ x5 = s1 - s5;
+ x6 = s2 - s6;
+ x7 = s3 - s7;
+ x8 = fdct_round_shift(s8 + s12);
+ x9 = fdct_round_shift(s9 + s13);
+ x10 = fdct_round_shift(s10 + s14);
+ x11 = fdct_round_shift(s11 + s15);
+ x12 = fdct_round_shift(s8 - s12);
+ x13 = fdct_round_shift(s9 - s13);
+ x14 = fdct_round_shift(s10 - s14);
+ x15 = fdct_round_shift(s11 - s15);
+
+ // stage 3
+ s0 = x0;
+ s1 = x1;
+ s2 = x2;
+ s3 = x3;
+ s4 = x4 * cospi_8_64 + x5 * cospi_24_64;
+ s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
+ s6 = -x6 * cospi_24_64 + x7 * cospi_8_64;
+ s7 = x6 * cospi_8_64 + x7 * cospi_24_64;
+ s8 = x8;
+ s9 = x9;
+ s10 = x10;
+ s11 = x11;
+ s12 = x12 * cospi_8_64 + x13 * cospi_24_64;
+ s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
+ s14 = -x14 * cospi_24_64 + x15 * cospi_8_64;
+ s15 = x14 * cospi_8_64 + x15 * cospi_24_64;
+
+ x0 = s0 + s2;
+ x1 = s1 + s3;
+ x2 = s0 - s2;
+ x3 = s1 - s3;
+ x4 = fdct_round_shift(s4 + s6);
+ x5 = fdct_round_shift(s5 + s7);
+ x6 = fdct_round_shift(s4 - s6);
+ x7 = fdct_round_shift(s5 - s7);
+ x8 = s8 + s10;
+ x9 = s9 + s11;
+ x10 = s8 - s10;
+ x11 = s9 - s11;
+ x12 = fdct_round_shift(s12 + s14);
+ x13 = fdct_round_shift(s13 + s15);
+ x14 = fdct_round_shift(s12 - s14);
+ x15 = fdct_round_shift(s13 - s15);
+
+ // stage 4
+ s2 = (-cospi_16_64) * (x2 + x3);
+ s3 = cospi_16_64 * (x2 - x3);
+ s6 = cospi_16_64 * (x6 + x7);
+ s7 = cospi_16_64 * (-x6 + x7);
+ s10 = cospi_16_64 * (x10 + x11);
+ s11 = cospi_16_64 * (-x10 + x11);
+ s14 = (-cospi_16_64) * (x14 + x15);
+ s15 = cospi_16_64 * (x14 - x15);
+
+ x2 = fdct_round_shift(s2);
+ x3 = fdct_round_shift(s3);
+ x6 = fdct_round_shift(s6);
+ x7 = fdct_round_shift(s7);
+ x10 = fdct_round_shift(s10);
+ x11 = fdct_round_shift(s11);
+ x14 = fdct_round_shift(s14);
+ x15 = fdct_round_shift(s15);
+
+ output[0] = (tran_low_t)x0;
+ output[1] = (tran_low_t)-x8;
+ output[2] = (tran_low_t)x12;
+ output[3] = (tran_low_t)-x4;
+ output[4] = (tran_low_t)x6;
+ output[5] = (tran_low_t)x14;
+ output[6] = (tran_low_t)x10;
+ output[7] = (tran_low_t)x2;
+ output[8] = (tran_low_t)x3;
+ output[9] = (tran_low_t)x11;
+ output[10] = (tran_low_t)x15;
+ output[11] = (tran_low_t)x7;
+ output[12] = (tran_low_t)x5;
+ output[13] = (tran_low_t)-x13;
+ output[14] = (tran_low_t)x9;
+ output[15] = (tran_low_t)-x1;
+}
+
+static const transform_2d FHT_4[] = {
+ { fdct4, fdct4 }, // DCT_DCT = 0
+ { fadst4, fdct4 }, // ADST_DCT = 1
+ { fdct4, fadst4 }, // DCT_ADST = 2
+ { fadst4, fadst4 } // ADST_ADST = 3
+};
+
+static const transform_2d FHT_8[] = {
+ { fdct8, fdct8 }, // DCT_DCT = 0
+ { fadst8, fdct8 }, // ADST_DCT = 1
+ { fdct8, fadst8 }, // DCT_ADST = 2
+ { fadst8, fadst8 } // ADST_ADST = 3
+};
+
+static const transform_2d FHT_16[] = {
+ { fdct16, fdct16 }, // DCT_DCT = 0
+ { fadst16, fdct16 }, // ADST_DCT = 1
+ { fdct16, fadst16 }, // DCT_ADST = 2
+ { fadst16, fadst16 } // ADST_ADST = 3
+};
+
+void vp9_fht4x4_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ if (tx_type == DCT_DCT) {
+ vpx_fdct4x4_c(input, output, stride);
+ } else {
+ tran_low_t out[4 * 4];
+ int i, j;
+ tran_low_t temp_in[4], temp_out[4];
+ const transform_2d ht = FHT_4[tx_type];
+
+ // Columns
+ for (i = 0; i < 4; ++i) {
+ for (j = 0; j < 4; ++j) temp_in[j] = input[j * stride + i] * 16;
+ if (i == 0 && temp_in[0]) temp_in[0] += 1;
+ ht.cols(temp_in, temp_out);
+ for (j = 0; j < 4; ++j) out[j * 4 + i] = temp_out[j];
+ }
+
+ // Rows
+ for (i = 0; i < 4; ++i) {
+ for (j = 0; j < 4; ++j) temp_in[j] = out[j + i * 4];
+ ht.rows(temp_in, temp_out);
+ for (j = 0; j < 4; ++j) output[j + i * 4] = (temp_out[j] + 1) >> 2;
+ }
+ }
+}
+
+void vp9_fht8x8_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ if (tx_type == DCT_DCT) {
+ vpx_fdct8x8_c(input, output, stride);
+ } else {
+ tran_low_t out[64];
+ int i, j;
+ tran_low_t temp_in[8], temp_out[8];
+ const transform_2d ht = FHT_8[tx_type];
+
+ // Columns
+ for (i = 0; i < 8; ++i) {
+ for (j = 0; j < 8; ++j) temp_in[j] = input[j * stride + i] * 4;
+ ht.cols(temp_in, temp_out);
+ for (j = 0; j < 8; ++j) out[j * 8 + i] = temp_out[j];
+ }
+
+ // Rows
+ for (i = 0; i < 8; ++i) {
+ for (j = 0; j < 8; ++j) temp_in[j] = out[j + i * 8];
+ ht.rows(temp_in, temp_out);
+ for (j = 0; j < 8; ++j)
+ output[j + i * 8] = (temp_out[j] + (temp_out[j] < 0)) >> 1;
+ }
+ }
+}
+
+/* 4-point reversible, orthonormal Walsh-Hadamard in 3.5 adds, 0.5 shifts per
+ pixel. */
+void vp9_fwht4x4_c(const int16_t *input, tran_low_t *output, int stride) {
+ int i;
+ tran_high_t a1, b1, c1, d1, e1;
+ const int16_t *ip_pass0 = input;
+ const tran_low_t *ip = NULL;
+ tran_low_t *op = output;
+
+ for (i = 0; i < 4; i++) {
+ a1 = ip_pass0[0 * stride];
+ b1 = ip_pass0[1 * stride];
+ c1 = ip_pass0[2 * stride];
+ d1 = ip_pass0[3 * stride];
+
+ a1 += b1;
+ d1 = d1 - c1;
+ e1 = (a1 - d1) >> 1;
+ b1 = e1 - b1;
+ c1 = e1 - c1;
+ a1 -= c1;
+ d1 += b1;
+ op[0] = (tran_low_t)a1;
+ op[4] = (tran_low_t)c1;
+ op[8] = (tran_low_t)d1;
+ op[12] = (tran_low_t)b1;
+
+ ip_pass0++;
+ op++;
+ }
+ ip = output;
+ op = output;
+
+ for (i = 0; i < 4; i++) {
+ a1 = ip[0];
+ b1 = ip[1];
+ c1 = ip[2];
+ d1 = ip[3];
+
+ a1 += b1;
+ d1 -= c1;
+ e1 = (a1 - d1) >> 1;
+ b1 = e1 - b1;
+ c1 = e1 - c1;
+ a1 -= c1;
+ d1 += b1;
+ op[0] = (tran_low_t)(a1 * UNIT_QUANT_FACTOR);
+ op[1] = (tran_low_t)(c1 * UNIT_QUANT_FACTOR);
+ op[2] = (tran_low_t)(d1 * UNIT_QUANT_FACTOR);
+ op[3] = (tran_low_t)(b1 * UNIT_QUANT_FACTOR);
+
+ ip += 4;
+ op += 4;
+ }
+}
+
+void vp9_fht16x16_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ if (tx_type == DCT_DCT) {
+ vpx_fdct16x16_c(input, output, stride);
+ } else {
+ tran_low_t out[256];
+ int i, j;
+ tran_low_t temp_in[16], temp_out[16];
+ const transform_2d ht = FHT_16[tx_type];
+
+ // Columns
+ for (i = 0; i < 16; ++i) {
+ for (j = 0; j < 16; ++j) temp_in[j] = input[j * stride + i] * 4;
+ ht.cols(temp_in, temp_out);
+ for (j = 0; j < 16; ++j)
+ out[j * 16 + i] = (temp_out[j] + 1 + (temp_out[j] < 0)) >> 2;
+ }
+
+ // Rows
+ for (i = 0; i < 16; ++i) {
+ for (j = 0; j < 16; ++j) temp_in[j] = out[j + i * 16];
+ ht.rows(temp_in, temp_out);
+ for (j = 0; j < 16; ++j) output[j + i * 16] = temp_out[j];
+ }
+ }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_fht4x4_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ vp9_fht4x4_c(input, output, stride, tx_type);
+}
+
+void vp9_highbd_fht8x8_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ vp9_fht8x8_c(input, output, stride, tx_type);
+}
+
+void vp9_highbd_fwht4x4_c(const int16_t *input, tran_low_t *output,
+ int stride) {
+ vp9_fwht4x4_c(input, output, stride);
+}
+
+void vp9_highbd_fht16x16_c(const int16_t *input, tran_low_t *output, int stride,
+ int tx_type) {
+ vp9_fht16x16_c(input, output, stride, tx_type);
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
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