| // Copyright 2015 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING 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. |
| // ----------------------------------------------------------------------------- |
| // |
| // Image transform methods for lossless encoder. |
| // |
| // Author(s): Djordje Pesut (djordje.pesut@imgtec.com) |
| // Jovan Zelincevic (jovan.zelincevic@imgtec.com) |
| |
| #include "./dsp.h" |
| |
| #if defined(WEBP_USE_MIPS_DSP_R2) |
| |
| #include "./lossless.h" |
| |
| static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, |
| int num_pixels) { |
| uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; |
| uint32_t* const p_loop1_end = argb_data + (num_pixels & ~3); |
| uint32_t* const p_loop2_end = p_loop1_end + (num_pixels & 3); |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "beq %[argb_data], %[p_loop1_end], 3f \n\t" |
| " nop \n\t" |
| "0: \n\t" |
| "lw %[temp0], 0(%[argb_data]) \n\t" |
| "lw %[temp1], 4(%[argb_data]) \n\t" |
| "lw %[temp2], 8(%[argb_data]) \n\t" |
| "lw %[temp3], 12(%[argb_data]) \n\t" |
| "ext %[temp4], %[temp0], 8, 8 \n\t" |
| "ext %[temp5], %[temp1], 8, 8 \n\t" |
| "ext %[temp6], %[temp2], 8, 8 \n\t" |
| "ext %[temp7], %[temp3], 8, 8 \n\t" |
| "addiu %[argb_data], %[argb_data], 16 \n\t" |
| "replv.ph %[temp4], %[temp4] \n\t" |
| "replv.ph %[temp5], %[temp5] \n\t" |
| "replv.ph %[temp6], %[temp6] \n\t" |
| "replv.ph %[temp7], %[temp7] \n\t" |
| "subu.qb %[temp0], %[temp0], %[temp4] \n\t" |
| "subu.qb %[temp1], %[temp1], %[temp5] \n\t" |
| "subu.qb %[temp2], %[temp2], %[temp6] \n\t" |
| "subu.qb %[temp3], %[temp3], %[temp7] \n\t" |
| "sw %[temp0], -16(%[argb_data]) \n\t" |
| "sw %[temp1], -12(%[argb_data]) \n\t" |
| "sw %[temp2], -8(%[argb_data]) \n\t" |
| "bne %[argb_data], %[p_loop1_end], 0b \n\t" |
| " sw %[temp3], -4(%[argb_data]) \n\t" |
| "3: \n\t" |
| "beq %[argb_data], %[p_loop2_end], 2f \n\t" |
| " nop \n\t" |
| "1: \n\t" |
| "lw %[temp0], 0(%[argb_data]) \n\t" |
| "addiu %[argb_data], %[argb_data], 4 \n\t" |
| "ext %[temp4], %[temp0], 8, 8 \n\t" |
| "replv.ph %[temp4], %[temp4] \n\t" |
| "subu.qb %[temp0], %[temp0], %[temp4] \n\t" |
| "bne %[argb_data], %[p_loop2_end], 1b \n\t" |
| " sw %[temp0], -4(%[argb_data]) \n\t" |
| "2: \n\t" |
| ".set pop \n\t" |
| : [argb_data]"+&r"(argb_data), [temp0]"=&r"(temp0), |
| [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), |
| [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), |
| [temp7]"=&r"(temp7) |
| : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) |
| : "memory" |
| ); |
| } |
| |
| static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred, |
| int8_t color) { |
| return (uint32_t)((int)(color_pred) * color) >> 5; |
| } |
| |
| static void TransformColor(const VP8LMultipliers* const m, uint32_t* data, |
| int num_pixels) { |
| int temp0, temp1, temp2, temp3, temp4, temp5; |
| uint32_t argb, argb1, new_red, new_red1; |
| const uint32_t G_to_R = m->green_to_red_; |
| const uint32_t G_to_B = m->green_to_blue_; |
| const uint32_t R_to_B = m->red_to_blue_; |
| uint32_t* const p_loop_end = data + (num_pixels & ~1); |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "beq %[data], %[p_loop_end], 1f \n\t" |
| " nop \n\t" |
| "replv.ph %[temp0], %[G_to_R] \n\t" |
| "replv.ph %[temp1], %[G_to_B] \n\t" |
| "replv.ph %[temp2], %[R_to_B] \n\t" |
| "shll.ph %[temp0], %[temp0], 8 \n\t" |
| "shll.ph %[temp1], %[temp1], 8 \n\t" |
| "shll.ph %[temp2], %[temp2], 8 \n\t" |
| "shra.ph %[temp0], %[temp0], 8 \n\t" |
| "shra.ph %[temp1], %[temp1], 8 \n\t" |
| "shra.ph %[temp2], %[temp2], 8 \n\t" |
| "0: \n\t" |
| "lw %[argb], 0(%[data]) \n\t" |
| "lw %[argb1], 4(%[data]) \n\t" |
| "lhu %[new_red], 2(%[data]) \n\t" |
| "lhu %[new_red1], 6(%[data]) \n\t" |
| "precrq.qb.ph %[temp3], %[argb], %[argb1] \n\t" |
| "precr.qb.ph %[temp4], %[argb], %[argb1] \n\t" |
| "preceu.ph.qbra %[temp3], %[temp3] \n\t" |
| "preceu.ph.qbla %[temp4], %[temp4] \n\t" |
| "shll.ph %[temp3], %[temp3], 8 \n\t" |
| "shll.ph %[temp4], %[temp4], 8 \n\t" |
| "shra.ph %[temp3], %[temp3], 8 \n\t" |
| "shra.ph %[temp4], %[temp4], 8 \n\t" |
| "mul.ph %[temp5], %[temp3], %[temp0] \n\t" |
| "mul.ph %[temp3], %[temp3], %[temp1] \n\t" |
| "mul.ph %[temp4], %[temp4], %[temp2] \n\t" |
| "addiu %[data], %[data], 8 \n\t" |
| "ins %[new_red1], %[new_red], 16, 16 \n\t" |
| "ins %[argb1], %[argb], 16, 16 \n\t" |
| "shra.ph %[temp5], %[temp5], 5 \n\t" |
| "shra.ph %[temp3], %[temp3], 5 \n\t" |
| "shra.ph %[temp4], %[temp4], 5 \n\t" |
| "subu.ph %[new_red1], %[new_red1], %[temp5] \n\t" |
| "subu.ph %[argb1], %[argb1], %[temp3] \n\t" |
| "preceu.ph.qbra %[temp5], %[new_red1] \n\t" |
| "subu.ph %[argb1], %[argb1], %[temp4] \n\t" |
| "preceu.ph.qbra %[temp3], %[argb1] \n\t" |
| "sb %[temp5], -2(%[data]) \n\t" |
| "sb %[temp3], -4(%[data]) \n\t" |
| "sra %[temp5], %[temp5], 16 \n\t" |
| "sra %[temp3], %[temp3], 16 \n\t" |
| "sb %[temp5], -6(%[data]) \n\t" |
| "bne %[data], %[p_loop_end], 0b \n\t" |
| " sb %[temp3], -8(%[data]) \n\t" |
| "1: \n\t" |
| ".set pop \n\t" |
| : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), |
| [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), |
| [new_red1]"=&r"(new_red1), [new_red]"=&r"(new_red), |
| [argb]"=&r"(argb), [argb1]"=&r"(argb1), [data]"+&r"(data) |
| : [G_to_R]"r"(G_to_R), [R_to_B]"r"(R_to_B), |
| [G_to_B]"r"(G_to_B), [p_loop_end]"r"(p_loop_end) |
| : "memory", "hi", "lo" |
| ); |
| |
| if (num_pixels & 1) { |
| const uint32_t argb_ = data[0]; |
| const uint32_t green = argb_ >> 8; |
| const uint32_t red = argb_ >> 16; |
| uint32_t new_blue = argb_; |
| new_red = red; |
| new_red -= ColorTransformDelta(m->green_to_red_, green); |
| new_red &= 0xff; |
| new_blue -= ColorTransformDelta(m->green_to_blue_, green); |
| new_blue -= ColorTransformDelta(m->red_to_blue_, red); |
| new_blue &= 0xff; |
| data[0] = (argb_ & 0xff00ff00u) | (new_red << 16) | (new_blue); |
| } |
| } |
| |
| static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue, |
| uint8_t red_to_blue, |
| uint32_t argb) { |
| const uint32_t green = argb >> 8; |
| const uint32_t red = argb >> 16; |
| uint8_t new_blue = argb; |
| new_blue -= ColorTransformDelta(green_to_blue, green); |
| new_blue -= ColorTransformDelta(red_to_blue, red); |
| return (new_blue & 0xff); |
| } |
| |
| static void CollectColorBlueTransforms(const uint32_t* argb, int stride, |
| int tile_width, int tile_height, |
| int green_to_blue, int red_to_blue, |
| int histo[]) { |
| const int rtb = (red_to_blue << 16) | (red_to_blue & 0xffff); |
| const int gtb = (green_to_blue << 16) | (green_to_blue & 0xffff); |
| const uint32_t mask = 0xff00ffu; |
| while (tile_height-- > 0) { |
| int x; |
| const uint32_t* p_argb = argb; |
| argb += stride; |
| for (x = 0; x < (tile_width >> 1); ++x) { |
| int temp0, temp1, temp2, temp3, temp4, temp5, temp6; |
| __asm__ volatile ( |
| "lw %[temp0], 0(%[p_argb]) \n\t" |
| "lw %[temp1], 4(%[p_argb]) \n\t" |
| "precr.qb.ph %[temp2], %[temp0], %[temp1] \n\t" |
| "ins %[temp1], %[temp0], 16, 16 \n\t" |
| "shra.ph %[temp2], %[temp2], 8 \n\t" |
| "shra.ph %[temp3], %[temp1], 8 \n\t" |
| "mul.ph %[temp5], %[temp2], %[rtb] \n\t" |
| "mul.ph %[temp6], %[temp3], %[gtb] \n\t" |
| "and %[temp4], %[temp1], %[mask] \n\t" |
| "addiu %[p_argb], %[p_argb], 8 \n\t" |
| "shra.ph %[temp5], %[temp5], 5 \n\t" |
| "shra.ph %[temp6], %[temp6], 5 \n\t" |
| "subu.qb %[temp2], %[temp4], %[temp5] \n\t" |
| "subu.qb %[temp2], %[temp2], %[temp6] \n\t" |
| : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), |
| [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), |
| [temp5]"=&r"(temp5), [temp6]"=&r"(temp6) |
| : [rtb]"r"(rtb), [gtb]"r"(gtb), [mask]"r"(mask) |
| : "memory", "hi", "lo" |
| ); |
| ++histo[(uint8_t)(temp2 >> 16)]; |
| ++histo[(uint8_t)temp2]; |
| } |
| if (tile_width & 1) { |
| ++histo[TransformColorBlue(green_to_blue, red_to_blue, *p_argb)]; |
| } |
| } |
| } |
| |
| static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red, |
| uint32_t argb) { |
| const uint32_t green = argb >> 8; |
| uint32_t new_red = argb >> 16; |
| new_red -= ColorTransformDelta(green_to_red, green); |
| return (new_red & 0xff); |
| } |
| |
| static void CollectColorRedTransforms(const uint32_t* argb, int stride, |
| int tile_width, int tile_height, |
| int green_to_red, int histo[]) { |
| const int gtr = (green_to_red << 16) | (green_to_red & 0xffff); |
| while (tile_height-- > 0) { |
| int x; |
| const uint32_t* p_argb = argb; |
| argb += stride; |
| for (x = 0; x < (tile_width >> 1); ++x) { |
| int temp0, temp1, temp2, temp3, temp4; |
| __asm__ volatile ( |
| "lw %[temp0], 0(%[p_argb]) \n\t" |
| "lw %[temp1], 4(%[p_argb]) \n\t" |
| "precrq.ph.w %[temp4], %[temp0], %[temp1] \n\t" |
| "ins %[temp1], %[temp0], 16, 16 \n\t" |
| "shra.ph %[temp3], %[temp1], 8 \n\t" |
| "mul.ph %[temp2], %[temp3], %[gtr] \n\t" |
| "addiu %[p_argb], %[p_argb], 8 \n\t" |
| "shra.ph %[temp2], %[temp2], 5 \n\t" |
| "subu.qb %[temp2], %[temp4], %[temp2] \n\t" |
| : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), |
| [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4) |
| : [gtr]"r"(gtr) |
| : "memory", "hi", "lo" |
| ); |
| ++histo[(uint8_t)(temp2 >> 16)]; |
| ++histo[(uint8_t)temp2]; |
| } |
| if (tile_width & 1) { |
| ++histo[TransformColorRed(green_to_red, *p_argb)]; |
| } |
| } |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern void VP8LEncDspInitMIPSdspR2(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPSdspR2(void) { |
| VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; |
| VP8LTransformColor = TransformColor; |
| VP8LCollectColorBlueTransforms = CollectColorBlueTransforms; |
| VP8LCollectColorRedTransforms = CollectColorRedTransforms; |
| } |
| |
| #else // !WEBP_USE_MIPS_DSP_R2 |
| |
| WEBP_DSP_INIT_STUB(VP8LEncDspInitMIPSdspR2) |
| |
| #endif // WEBP_USE_MIPS_DSP_R2 |
