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Open Source Computer Vision Library
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135 lines
7.8 KiB
135 lines
7.8 KiB
8 years ago
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// Copyright 2014 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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// MIPS DSPr2 version of YUV to RGB upsampling functions.
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//
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// Author(s): Branimir Vasic (branimir.vasic@imgtec.com)
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// Djordje Pesut (djordje.pesut@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 "./yuv.h"
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//------------------------------------------------------------------------------
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// simple point-sampling
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#define ROW_FUNC_PART_1() \
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"lbu %[temp3], 0(%[v]) \n\t" \
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"lbu %[temp4], 0(%[u]) \n\t" \
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"lbu %[temp0], 0(%[y]) \n\t" \
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"mul %[temp1], %[t_con_1], %[temp3] \n\t" \
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"mul %[temp3], %[t_con_2], %[temp3] \n\t" \
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"mul %[temp2], %[t_con_3], %[temp4] \n\t" \
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"mul %[temp4], %[t_con_4], %[temp4] \n\t" \
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"mul %[temp0], %[t_con_5], %[temp0] \n\t" \
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"subu %[temp1], %[temp1], %[t_con_6] \n\t" \
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"subu %[temp3], %[temp3], %[t_con_7] \n\t" \
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"addu %[temp2], %[temp2], %[temp3] \n\t" \
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"subu %[temp4], %[temp4], %[t_con_8] \n\t" \
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#define ROW_FUNC_PART_2(R, G, B, K) \
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"addu %[temp5], %[temp0], %[temp1] \n\t" \
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"subu %[temp6], %[temp0], %[temp2] \n\t" \
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"addu %[temp7], %[temp0], %[temp4] \n\t" \
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".if " #K " \n\t" \
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"lbu %[temp0], 1(%[y]) \n\t" \
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".endif \n\t" \
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"shll_s.w %[temp5], %[temp5], 17 \n\t" \
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"shll_s.w %[temp6], %[temp6], 17 \n\t" \
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".if " #K " \n\t" \
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"mul %[temp0], %[t_con_5], %[temp0] \n\t" \
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".endif \n\t" \
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"shll_s.w %[temp7], %[temp7], 17 \n\t" \
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"precrqu_s.qb.ph %[temp5], %[temp5], $zero \n\t" \
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"precrqu_s.qb.ph %[temp6], %[temp6], $zero \n\t" \
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"precrqu_s.qb.ph %[temp7], %[temp7], $zero \n\t" \
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"srl %[temp5], %[temp5], 24 \n\t" \
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"srl %[temp6], %[temp6], 24 \n\t" \
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"srl %[temp7], %[temp7], 24 \n\t" \
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"sb %[temp5], " #R "(%[dst]) \n\t" \
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"sb %[temp6], " #G "(%[dst]) \n\t" \
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"sb %[temp7], " #B "(%[dst]) \n\t" \
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#define ASM_CLOBBER_LIST() \
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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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[temp6]"=&r"(temp6), [temp7]"=&r"(temp7) \
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: [t_con_1]"r"(t_con_1), [t_con_2]"r"(t_con_2), [t_con_3]"r"(t_con_3), \
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[t_con_4]"r"(t_con_4), [t_con_5]"r"(t_con_5), [t_con_6]"r"(t_con_6), \
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[u]"r"(u), [v]"r"(v), [y]"r"(y), [dst]"r"(dst), \
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[t_con_7]"r"(t_con_7), [t_con_8]"r"(t_con_8) \
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: "memory", "hi", "lo" \
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#define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \
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static void FUNC_NAME(const uint8_t* y, \
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const uint8_t* u, const uint8_t* v, \
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uint8_t* dst, int len) { \
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int i; \
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uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; \
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const int t_con_1 = 26149; \
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const int t_con_2 = 13320; \
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const int t_con_3 = 6419; \
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const int t_con_4 = 33050; \
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const int t_con_5 = 19077; \
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const int t_con_6 = 14234; \
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const int t_con_7 = 8708; \
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const int t_con_8 = 17685; \
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for (i = 0; i < (len >> 1); i++) { \
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__asm__ volatile ( \
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ROW_FUNC_PART_1() \
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ROW_FUNC_PART_2(R, G, B, 1) \
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ROW_FUNC_PART_2(R + XSTEP, G + XSTEP, B + XSTEP, 0) \
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ASM_CLOBBER_LIST() \
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); \
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if (A) dst[A] = dst[A + XSTEP] = 0xff; \
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y += 2; \
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++u; \
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++v; \
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dst += 2 * XSTEP; \
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} \
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if (len & 1) { \
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__asm__ volatile ( \
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ROW_FUNC_PART_1() \
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ROW_FUNC_PART_2(R, G, B, 0) \
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ASM_CLOBBER_LIST() \
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); \
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if (A) dst[A] = 0xff; \
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} \
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}
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ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0)
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ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3)
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ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0)
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ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3)
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#undef ROW_FUNC
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#undef ASM_CLOBBER_LIST
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#undef ROW_FUNC_PART_2
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#undef ROW_FUNC_PART_1
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//------------------------------------------------------------------------------
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// Entry point
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extern void WebPInitSamplersMIPSdspR2(void);
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WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPSdspR2(void) {
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WebPSamplers[MODE_RGB] = YuvToRgbRow;
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WebPSamplers[MODE_RGBA] = YuvToRgbaRow;
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WebPSamplers[MODE_BGR] = YuvToBgrRow;
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WebPSamplers[MODE_BGRA] = YuvToBgraRow;
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}
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#else // !WEBP_USE_MIPS_DSP_R2
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WEBP_DSP_INIT_STUB(WebPInitSamplersMIPSdspR2)
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#endif // WEBP_USE_MIPS_DSP_R2
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