147 lines
5.5 KiB
C
147 lines
5.5 KiB
C
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// MSA variant of Image transform methods for lossless encoder.
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//
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// Authors: Prashant Patil (Prashant.Patil@imgtec.com)
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#include "./dsp.h"
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#if defined(WEBP_USE_MSA)
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#include "./lossless.h"
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#include "./msa_macro.h"
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#define TRANSFORM_COLOR_8(src0, src1, dst0, dst1, c0, c1, mask0, mask1) do { \
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v8i16 g0, g1, t0, t1, t2, t3; \
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v4i32 t4, t5; \
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VSHF_B2_SH(src0, src0, src1, src1, mask0, mask0, g0, g1); \
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DOTP_SB2_SH(g0, g1, c0, c0, t0, t1); \
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SRAI_H2_SH(t0, t1, 5); \
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t0 = __msa_subv_h((v8i16)src0, t0); \
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t1 = __msa_subv_h((v8i16)src1, t1); \
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t4 = __msa_srli_w((v4i32)src0, 16); \
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t5 = __msa_srli_w((v4i32)src1, 16); \
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DOTP_SB2_SH(t4, t5, c1, c1, t2, t3); \
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SRAI_H2_SH(t2, t3, 5); \
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SUB2(t0, t2, t1, t3, t0, t1); \
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VSHF_B2_UB(src0, t0, src1, t1, mask1, mask1, dst0, dst1); \
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} while (0)
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#define TRANSFORM_COLOR_4(src, dst, c0, c1, mask0, mask1) do { \
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const v16i8 g0 = VSHF_SB(src, src, mask0); \
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v8i16 t0 = __msa_dotp_s_h(c0, g0); \
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v8i16 t1; \
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v4i32 t2; \
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t0 = SRAI_H(t0, 5); \
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t0 = __msa_subv_h((v8i16)src, t0); \
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t2 = __msa_srli_w((v4i32)src, 16); \
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t1 = __msa_dotp_s_h(c1, (v16i8)t2); \
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t1 = SRAI_H(t1, 5); \
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t0 = t0 - t1; \
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dst = VSHF_UB(src, t0, mask1); \
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} while (0)
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static void TransformColor(const VP8LMultipliers* const m, uint32_t* data,
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int num_pixels) {
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v16u8 src0, dst0;
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const v16i8 g2br = (v16i8)__msa_fill_w(m->green_to_blue_ |
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(m->green_to_red_ << 16));
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const v16i8 r2b = (v16i8)__msa_fill_w(m->red_to_blue_);
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const v16u8 mask0 = { 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255,
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13, 255, 13, 255 };
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const v16u8 mask1 = { 16, 1, 18, 3, 20, 5, 22, 7, 24, 9, 26, 11,
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28, 13, 30, 15 };
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while (num_pixels >= 8) {
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v16u8 src1, dst1;
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LD_UB2(data, 4, src0, src1);
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TRANSFORM_COLOR_8(src0, src1, dst0, dst1, g2br, r2b, mask0, mask1);
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ST_UB2(dst0, dst1, data, 4);
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data += 8;
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num_pixels -= 8;
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}
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if (num_pixels > 0) {
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if (num_pixels >= 4) {
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src0 = LD_UB(data);
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TRANSFORM_COLOR_4(src0, dst0, g2br, r2b, mask0, mask1);
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ST_UB(dst0, data);
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data += 4;
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num_pixels -= 4;
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}
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if (num_pixels > 0) {
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src0 = LD_UB(data);
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TRANSFORM_COLOR_4(src0, dst0, g2br, r2b, mask0, mask1);
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if (num_pixels == 3) {
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const uint64_t pix_d = __msa_copy_s_d((v2i64)dst0, 0);
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const uint32_t pix_w = __msa_copy_s_w((v4i32)dst0, 2);
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SD(pix_d, data + 0);
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SW(pix_w, data + 2);
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} else if (num_pixels == 2) {
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const uint64_t pix_d = __msa_copy_s_d((v2i64)dst0, 0);
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SD(pix_d, data);
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} else {
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const uint32_t pix_w = __msa_copy_s_w((v4i32)dst0, 0);
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SW(pix_w, data);
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}
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}
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}
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}
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static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) {
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int i;
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uint8_t* ptemp_data = (uint8_t*)argb_data;
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v16u8 src0, dst0, tmp0;
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const v16u8 mask = { 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255,
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13, 255, 13, 255 };
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while (num_pixels >= 8) {
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v16u8 src1, dst1, tmp1;
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LD_UB2(ptemp_data, 16, src0, src1);
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VSHF_B2_UB(src0, src1, src1, src0, mask, mask, tmp0, tmp1);
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SUB2(src0, tmp0, src1, tmp1, dst0, dst1);
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ST_UB2(dst0, dst1, ptemp_data, 16);
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ptemp_data += 8 * 4;
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num_pixels -= 8;
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}
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if (num_pixels > 0) {
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if (num_pixels >= 4) {
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src0 = LD_UB(ptemp_data);
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tmp0 = VSHF_UB(src0, src0, mask);
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dst0 = src0 - tmp0;
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ST_UB(dst0, ptemp_data);
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ptemp_data += 4 * 4;
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num_pixels -= 4;
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}
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for (i = 0; i < num_pixels; i++) {
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const uint8_t b = ptemp_data[0];
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const uint8_t g = ptemp_data[1];
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const uint8_t r = ptemp_data[2];
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ptemp_data[0] = (b - g) & 0xff;
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ptemp_data[2] = (r - g) & 0xff;
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ptemp_data += 4;
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}
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}
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}
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//------------------------------------------------------------------------------
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// Entry point
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extern void VP8LEncDspInitMSA(void);
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WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMSA(void) {
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VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed;
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VP8LTransformColor = TransformColor;
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}
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#else // !WEBP_USE_MSA
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WEBP_DSP_INIT_STUB(VP8LEncDspInitMSA)
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#endif // WEBP_USE_MSA
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