55414bc573
Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.
(cherry picked from commit ee3cf211c6)
275 lines
13 KiB
C
275 lines
13 KiB
C
// Copyright 2015 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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// Image transform methods for lossless encoder.
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//
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// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
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// Jovan Zelincevic (jovan.zelincevic@imgtec.com)
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#include "./dsp.h"
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#if defined(WEBP_USE_MIPS_DSP_R2)
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#include "./lossless.h"
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static void SubtractGreenFromBlueAndRed(uint32_t* argb_data,
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int num_pixels) {
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uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
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uint32_t* const p_loop1_end = argb_data + (num_pixels & ~3);
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uint32_t* const p_loop2_end = p_loop1_end + (num_pixels & 3);
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__asm__ volatile (
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".set push \n\t"
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".set noreorder \n\t"
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"beq %[argb_data], %[p_loop1_end], 3f \n\t"
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" nop \n\t"
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"0: \n\t"
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"lw %[temp0], 0(%[argb_data]) \n\t"
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"lw %[temp1], 4(%[argb_data]) \n\t"
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"lw %[temp2], 8(%[argb_data]) \n\t"
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"lw %[temp3], 12(%[argb_data]) \n\t"
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"ext %[temp4], %[temp0], 8, 8 \n\t"
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"ext %[temp5], %[temp1], 8, 8 \n\t"
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"ext %[temp6], %[temp2], 8, 8 \n\t"
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"ext %[temp7], %[temp3], 8, 8 \n\t"
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"addiu %[argb_data], %[argb_data], 16 \n\t"
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"replv.ph %[temp4], %[temp4] \n\t"
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"replv.ph %[temp5], %[temp5] \n\t"
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"replv.ph %[temp6], %[temp6] \n\t"
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"replv.ph %[temp7], %[temp7] \n\t"
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"subu.qb %[temp0], %[temp0], %[temp4] \n\t"
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"subu.qb %[temp1], %[temp1], %[temp5] \n\t"
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"subu.qb %[temp2], %[temp2], %[temp6] \n\t"
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"subu.qb %[temp3], %[temp3], %[temp7] \n\t"
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"sw %[temp0], -16(%[argb_data]) \n\t"
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"sw %[temp1], -12(%[argb_data]) \n\t"
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"sw %[temp2], -8(%[argb_data]) \n\t"
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"bne %[argb_data], %[p_loop1_end], 0b \n\t"
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" sw %[temp3], -4(%[argb_data]) \n\t"
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"3: \n\t"
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"beq %[argb_data], %[p_loop2_end], 2f \n\t"
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" nop \n\t"
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"1: \n\t"
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"lw %[temp0], 0(%[argb_data]) \n\t"
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"addiu %[argb_data], %[argb_data], 4 \n\t"
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"ext %[temp4], %[temp0], 8, 8 \n\t"
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"replv.ph %[temp4], %[temp4] \n\t"
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"subu.qb %[temp0], %[temp0], %[temp4] \n\t"
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"bne %[argb_data], %[p_loop2_end], 1b \n\t"
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" sw %[temp0], -4(%[argb_data]) \n\t"
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"2: \n\t"
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".set pop \n\t"
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: [argb_data]"+&r"(argb_data), [temp0]"=&r"(temp0),
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[temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3),
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[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
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[temp7]"=&r"(temp7)
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: [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end)
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: "memory"
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);
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}
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static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred,
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int8_t color) {
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return (uint32_t)((int)(color_pred) * color) >> 5;
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}
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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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int temp0, temp1, temp2, temp3, temp4, temp5;
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uint32_t argb, argb1, new_red, new_red1;
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const uint32_t G_to_R = m->green_to_red_;
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const uint32_t G_to_B = m->green_to_blue_;
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const uint32_t R_to_B = m->red_to_blue_;
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uint32_t* const p_loop_end = data + (num_pixels & ~1);
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__asm__ volatile (
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".set push \n\t"
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".set noreorder \n\t"
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"beq %[data], %[p_loop_end], 1f \n\t"
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" nop \n\t"
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"replv.ph %[temp0], %[G_to_R] \n\t"
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"replv.ph %[temp1], %[G_to_B] \n\t"
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"replv.ph %[temp2], %[R_to_B] \n\t"
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"shll.ph %[temp0], %[temp0], 8 \n\t"
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"shll.ph %[temp1], %[temp1], 8 \n\t"
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"shll.ph %[temp2], %[temp2], 8 \n\t"
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"shra.ph %[temp0], %[temp0], 8 \n\t"
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"shra.ph %[temp1], %[temp1], 8 \n\t"
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"shra.ph %[temp2], %[temp2], 8 \n\t"
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"0: \n\t"
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"lw %[argb], 0(%[data]) \n\t"
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"lw %[argb1], 4(%[data]) \n\t"
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"lhu %[new_red], 2(%[data]) \n\t"
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"lhu %[new_red1], 6(%[data]) \n\t"
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"precrq.qb.ph %[temp3], %[argb], %[argb1] \n\t"
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"precr.qb.ph %[temp4], %[argb], %[argb1] \n\t"
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"preceu.ph.qbra %[temp3], %[temp3] \n\t"
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"preceu.ph.qbla %[temp4], %[temp4] \n\t"
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"shll.ph %[temp3], %[temp3], 8 \n\t"
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"shll.ph %[temp4], %[temp4], 8 \n\t"
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"shra.ph %[temp3], %[temp3], 8 \n\t"
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"shra.ph %[temp4], %[temp4], 8 \n\t"
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"mul.ph %[temp5], %[temp3], %[temp0] \n\t"
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"mul.ph %[temp3], %[temp3], %[temp1] \n\t"
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"mul.ph %[temp4], %[temp4], %[temp2] \n\t"
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"addiu %[data], %[data], 8 \n\t"
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"ins %[new_red1], %[new_red], 16, 16 \n\t"
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"ins %[argb1], %[argb], 16, 16 \n\t"
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"shra.ph %[temp5], %[temp5], 5 \n\t"
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"shra.ph %[temp3], %[temp3], 5 \n\t"
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"shra.ph %[temp4], %[temp4], 5 \n\t"
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"subu.ph %[new_red1], %[new_red1], %[temp5] \n\t"
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"subu.ph %[argb1], %[argb1], %[temp3] \n\t"
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"preceu.ph.qbra %[temp5], %[new_red1] \n\t"
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"subu.ph %[argb1], %[argb1], %[temp4] \n\t"
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"preceu.ph.qbra %[temp3], %[argb1] \n\t"
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"sb %[temp5], -2(%[data]) \n\t"
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"sb %[temp3], -4(%[data]) \n\t"
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"sra %[temp5], %[temp5], 16 \n\t"
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"sra %[temp3], %[temp3], 16 \n\t"
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"sb %[temp5], -6(%[data]) \n\t"
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"bne %[data], %[p_loop_end], 0b \n\t"
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" sb %[temp3], -8(%[data]) \n\t"
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"1: \n\t"
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".set pop \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
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[temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
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[new_red1]"=&r"(new_red1), [new_red]"=&r"(new_red),
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[argb]"=&r"(argb), [argb1]"=&r"(argb1), [data]"+&r"(data)
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: [G_to_R]"r"(G_to_R), [R_to_B]"r"(R_to_B),
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[G_to_B]"r"(G_to_B), [p_loop_end]"r"(p_loop_end)
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: "memory", "hi", "lo"
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);
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if (num_pixels & 1) {
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const uint32_t argb_ = data[0];
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const uint32_t green = argb_ >> 8;
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const uint32_t red = argb_ >> 16;
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uint32_t new_blue = argb_;
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new_red = red;
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new_red -= ColorTransformDelta(m->green_to_red_, green);
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new_red &= 0xff;
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new_blue -= ColorTransformDelta(m->green_to_blue_, green);
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new_blue -= ColorTransformDelta(m->red_to_blue_, red);
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new_blue &= 0xff;
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data[0] = (argb_ & 0xff00ff00u) | (new_red << 16) | (new_blue);
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}
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}
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static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue,
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uint8_t red_to_blue,
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uint32_t argb) {
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const uint32_t green = argb >> 8;
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const uint32_t red = argb >> 16;
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uint8_t new_blue = argb;
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new_blue -= ColorTransformDelta(green_to_blue, green);
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new_blue -= ColorTransformDelta(red_to_blue, red);
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return (new_blue & 0xff);
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}
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static void CollectColorBlueTransforms(const uint32_t* argb, int stride,
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int tile_width, int tile_height,
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int green_to_blue, int red_to_blue,
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int histo[]) {
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const int rtb = (red_to_blue << 16) | (red_to_blue & 0xffff);
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const int gtb = (green_to_blue << 16) | (green_to_blue & 0xffff);
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const uint32_t mask = 0xff00ffu;
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while (tile_height-- > 0) {
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int x;
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const uint32_t* p_argb = argb;
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argb += stride;
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for (x = 0; x < (tile_width >> 1); ++x) {
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int temp0, temp1, temp2, temp3, temp4, temp5, temp6;
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__asm__ volatile (
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"lw %[temp0], 0(%[p_argb]) \n\t"
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"lw %[temp1], 4(%[p_argb]) \n\t"
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"precr.qb.ph %[temp2], %[temp0], %[temp1] \n\t"
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"ins %[temp1], %[temp0], 16, 16 \n\t"
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"shra.ph %[temp2], %[temp2], 8 \n\t"
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"shra.ph %[temp3], %[temp1], 8 \n\t"
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"mul.ph %[temp5], %[temp2], %[rtb] \n\t"
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"mul.ph %[temp6], %[temp3], %[gtb] \n\t"
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"and %[temp4], %[temp1], %[mask] \n\t"
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"addiu %[p_argb], %[p_argb], 8 \n\t"
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"shra.ph %[temp5], %[temp5], 5 \n\t"
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"shra.ph %[temp6], %[temp6], 5 \n\t"
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"subu.qb %[temp2], %[temp4], %[temp5] \n\t"
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"subu.qb %[temp2], %[temp2], %[temp6] \n\t"
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: [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
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[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4),
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[temp5]"=&r"(temp5), [temp6]"=&r"(temp6)
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: [rtb]"r"(rtb), [gtb]"r"(gtb), [mask]"r"(mask)
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: "memory", "hi", "lo"
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);
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++histo[(uint8_t)(temp2 >> 16)];
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++histo[(uint8_t)temp2];
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}
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if (tile_width & 1) {
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++histo[TransformColorBlue(green_to_blue, red_to_blue, *p_argb)];
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}
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}
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}
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static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red,
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uint32_t argb) {
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const uint32_t green = argb >> 8;
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uint32_t new_red = argb >> 16;
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new_red -= ColorTransformDelta(green_to_red, green);
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return (new_red & 0xff);
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}
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static void CollectColorRedTransforms(const uint32_t* argb, int stride,
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int tile_width, int tile_height,
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int green_to_red, int histo[]) {
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const int gtr = (green_to_red << 16) | (green_to_red & 0xffff);
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while (tile_height-- > 0) {
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int x;
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const uint32_t* p_argb = argb;
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argb += stride;
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for (x = 0; x < (tile_width >> 1); ++x) {
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int temp0, temp1, temp2, temp3, temp4;
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__asm__ volatile (
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"lw %[temp0], 0(%[p_argb]) \n\t"
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"lw %[temp1], 4(%[p_argb]) \n\t"
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"precrq.ph.w %[temp4], %[temp0], %[temp1] \n\t"
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"ins %[temp1], %[temp0], 16, 16 \n\t"
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"shra.ph %[temp3], %[temp1], 8 \n\t"
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"mul.ph %[temp2], %[temp3], %[gtr] \n\t"
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"addiu %[p_argb], %[p_argb], 8 \n\t"
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"shra.ph %[temp2], %[temp2], 5 \n\t"
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"subu.qb %[temp2], %[temp4], %[temp2] \n\t"
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: [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
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[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4)
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: [gtr]"r"(gtr)
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: "memory", "hi", "lo"
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);
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++histo[(uint8_t)(temp2 >> 16)];
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++histo[(uint8_t)temp2];
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}
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if (tile_width & 1) {
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++histo[TransformColorRed(green_to_red, *p_argb)];
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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 VP8LEncDspInitMIPSdspR2(void);
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WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPSdspR2(void) {
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VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed;
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VP8LTransformColor = TransformColor;
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VP8LCollectColorBlueTransforms = CollectColorBlueTransforms;
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VP8LCollectColorRedTransforms = CollectColorRedTransforms;
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}
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#else // !WEBP_USE_MIPS_DSP_R2
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WEBP_DSP_INIT_STUB(VP8LEncDspInitMIPSdspR2)
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#endif // WEBP_USE_MIPS_DSP_R2
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