1 // Copyright 2014 Google Inc. All Rights Reserved.
2 //
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree.
8 // -----------------------------------------------------------------------------
9 //
10 // MIPS version of YUV to RGB upsampling functions.
11 //
12 // Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
13 // Jovan Zelincevic (jovan.zelincevic@imgtec.com)
14
15 #include "src/dsp/dsp.h"
16
17 #if defined(WEBP_USE_MIPS32)
18
19 #include "src/dsp/yuv.h"
20
21 //------------------------------------------------------------------------------
22 // simple point-sampling
23
24 #define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \
25 static void FUNC_NAME(const uint8_t* WEBP_RESTRICT y, \
26 const uint8_t* WEBP_RESTRICT u, \
27 const uint8_t* WEBP_RESTRICT v, \
28 uint8_t* WEBP_RESTRICT dst, int len) { \
29 int i, r, g, b; \
30 int temp0, temp1, temp2, temp3, temp4; \
31 for (i = 0; i < (len >> 1); i++) { \
32 temp1 = MultHi(v[0], 26149); \
33 temp3 = MultHi(v[0], 13320); \
34 temp2 = MultHi(u[0], 6419); \
35 temp4 = MultHi(u[0], 33050); \
36 temp0 = MultHi(y[0], 19077); \
37 temp1 -= 14234; \
38 temp3 -= 8708; \
39 temp2 += temp3; \
40 temp4 -= 17685; \
41 r = VP8Clip8(temp0 + temp1); \
42 g = VP8Clip8(temp0 - temp2); \
43 b = VP8Clip8(temp0 + temp4); \
44 temp0 = MultHi(y[1], 19077); \
45 dst[R] = r; \
46 dst[G] = g; \
47 dst[B] = b; \
48 if (A) dst[A] = 0xff; \
49 r = VP8Clip8(temp0 + temp1); \
50 g = VP8Clip8(temp0 - temp2); \
51 b = VP8Clip8(temp0 + temp4); \
52 dst[R + XSTEP] = r; \
53 dst[G + XSTEP] = g; \
54 dst[B + XSTEP] = b; \
55 if (A) dst[A + XSTEP] = 0xff; \
56 y += 2; \
57 ++u; \
58 ++v; \
59 dst += 2 * XSTEP; \
60 } \
61 if (len & 1) { \
62 temp1 = MultHi(v[0], 26149); \
63 temp3 = MultHi(v[0], 13320); \
64 temp2 = MultHi(u[0], 6419); \
65 temp4 = MultHi(u[0], 33050); \
66 temp0 = MultHi(y[0], 19077); \
67 temp1 -= 14234; \
68 temp3 -= 8708; \
69 temp2 += temp3; \
70 temp4 -= 17685; \
71 r = VP8Clip8(temp0 + temp1); \
72 g = VP8Clip8(temp0 - temp2); \
73 b = VP8Clip8(temp0 + temp4); \
74 dst[R] = r; \
75 dst[G] = g; \
76 dst[B] = b; \
77 if (A) dst[A] = 0xff; \
78 } \
79 }
80
81 ROW_FUNC(YuvToRgbRow_MIPS32, 3, 0, 1, 2, 0)
82 ROW_FUNC(YuvToRgbaRow_MIPS32, 4, 0, 1, 2, 3)
83 ROW_FUNC(YuvToBgrRow_MIPS32, 3, 2, 1, 0, 0)
84 ROW_FUNC(YuvToBgraRow_MIPS32, 4, 2, 1, 0, 3)
85
86 #undef ROW_FUNC
87
88 //------------------------------------------------------------------------------
89 // Entry point
90
91 extern void WebPInitSamplersMIPS32(void);
92
WebPInitSamplersMIPS32(void)93 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) {
94 WebPSamplers[MODE_RGB] = YuvToRgbRow_MIPS32;
95 WebPSamplers[MODE_RGBA] = YuvToRgbaRow_MIPS32;
96 WebPSamplers[MODE_BGR] = YuvToBgrRow_MIPS32;
97 WebPSamplers[MODE_BGRA] = YuvToBgraRow_MIPS32;
98 }
99
100 #else // !WEBP_USE_MIPS32
101
102 WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32)
103
104 #endif // WEBP_USE_MIPS32
105