1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "media/base/simd/convert_yuv_to_rgb.h"
6 #include "media/base/simd/yuv_to_rgb_table.h"
7
8 namespace media {
9
10 #define packuswb(x) ((x) < 0 ? 0 : ((x) > 255 ? 255 : (x)))
11 #define paddsw(x, y) (((x) + (y)) < -32768 ? -32768 : \
12 (((x) + (y)) > 32767 ? 32767 : ((x) + (y))))
13
14 // On Android, pixel layout is RGBA (see skia/include/core/SkColorPriv.h);
15 // however, other Chrome platforms use BGRA (see skia/config/SkUserConfig.h).
16 // Ideally, android should not use the functions here due to performance issue
17 // (http://crbug.com/249980).
18 #if defined(OS_ANDROID)
19 #define SK_R32_SHIFT 0
20 #define SK_G32_SHIFT 8
21 #define SK_B32_SHIFT 16
22 #define SK_A32_SHIFT 24
23 #define R_INDEX 0
24 #define G_INDEX 1
25 #define B_INDEX 2
26 #define A_INDEX 3
27 #else
28 #define SK_B32_SHIFT 0
29 #define SK_G32_SHIFT 8
30 #define SK_R32_SHIFT 16
31 #define SK_A32_SHIFT 24
32 #define B_INDEX 0
33 #define G_INDEX 1
34 #define R_INDEX 2
35 #define A_INDEX 3
36 #endif
37
ConvertYUVToRGB32_C(uint8 y,uint8 u,uint8 v,uint8 * rgb_buf)38 static inline void ConvertYUVToRGB32_C(uint8 y,
39 uint8 u,
40 uint8 v,
41 uint8* rgb_buf) {
42 int b = kCoefficientsRgbY[256+u][B_INDEX];
43 int g = kCoefficientsRgbY[256+u][G_INDEX];
44 int r = kCoefficientsRgbY[256+u][R_INDEX];
45 int a = kCoefficientsRgbY[256+u][A_INDEX];
46
47 b = paddsw(b, kCoefficientsRgbY[512+v][B_INDEX]);
48 g = paddsw(g, kCoefficientsRgbY[512+v][G_INDEX]);
49 r = paddsw(r, kCoefficientsRgbY[512+v][R_INDEX]);
50 a = paddsw(a, kCoefficientsRgbY[512+v][A_INDEX]);
51
52 b = paddsw(b, kCoefficientsRgbY[y][B_INDEX]);
53 g = paddsw(g, kCoefficientsRgbY[y][G_INDEX]);
54 r = paddsw(r, kCoefficientsRgbY[y][R_INDEX]);
55 a = paddsw(a, kCoefficientsRgbY[y][A_INDEX]);
56
57 b >>= 6;
58 g >>= 6;
59 r >>= 6;
60 a >>= 6;
61
62 *reinterpret_cast<uint32*>(rgb_buf) = (packuswb(b) << SK_B32_SHIFT) |
63 (packuswb(g) << SK_G32_SHIFT) |
64 (packuswb(r) << SK_R32_SHIFT) |
65 (packuswb(a) << SK_A32_SHIFT);
66 }
67
ConvertYUVAToARGB_C(uint8 y,uint8 u,uint8 v,uint8 a,uint8 * rgb_buf)68 static inline void ConvertYUVAToARGB_C(uint8 y,
69 uint8 u,
70 uint8 v,
71 uint8 a,
72 uint8* rgb_buf) {
73 int b = kCoefficientsRgbY[256+u][0];
74 int g = kCoefficientsRgbY[256+u][1];
75 int r = kCoefficientsRgbY[256+u][2];
76
77 b = paddsw(b, kCoefficientsRgbY[512+v][0]);
78 g = paddsw(g, kCoefficientsRgbY[512+v][1]);
79 r = paddsw(r, kCoefficientsRgbY[512+v][2]);
80
81 b = paddsw(b, kCoefficientsRgbY[y][0]);
82 g = paddsw(g, kCoefficientsRgbY[y][1]);
83 r = paddsw(r, kCoefficientsRgbY[y][2]);
84
85 b >>= 6;
86 g >>= 6;
87 r >>= 6;
88
89 b = packuswb(b) * a >> 8;
90 g = packuswb(g) * a >> 8;
91 r = packuswb(r) * a >> 8;
92
93 *reinterpret_cast<uint32*>(rgb_buf) = (b << SK_B32_SHIFT) |
94 (g << SK_G32_SHIFT) |
95 (r << SK_R32_SHIFT) |
96 (a << SK_A32_SHIFT);
97 }
98
ConvertYUVToRGB32Row_C(const uint8 * y_buf,const uint8 * u_buf,const uint8 * v_buf,uint8 * rgb_buf,ptrdiff_t width)99 void ConvertYUVToRGB32Row_C(const uint8* y_buf,
100 const uint8* u_buf,
101 const uint8* v_buf,
102 uint8* rgb_buf,
103 ptrdiff_t width) {
104 for (int x = 0; x < width; x += 2) {
105 uint8 u = u_buf[x >> 1];
106 uint8 v = v_buf[x >> 1];
107 uint8 y0 = y_buf[x];
108 ConvertYUVToRGB32_C(y0, u, v, rgb_buf);
109 if ((x + 1) < width) {
110 uint8 y1 = y_buf[x + 1];
111 ConvertYUVToRGB32_C(y1, u, v, rgb_buf + 4);
112 }
113 rgb_buf += 8; // Advance 2 pixels.
114 }
115 }
116
ConvertYUVAToARGBRow_C(const uint8 * y_buf,const uint8 * u_buf,const uint8 * v_buf,const uint8 * a_buf,uint8 * rgba_buf,ptrdiff_t width)117 void ConvertYUVAToARGBRow_C(const uint8* y_buf,
118 const uint8* u_buf,
119 const uint8* v_buf,
120 const uint8* a_buf,
121 uint8* rgba_buf,
122 ptrdiff_t width) {
123 for (int x = 0; x < width; x += 2) {
124 uint8 u = u_buf[x >> 1];
125 uint8 v = v_buf[x >> 1];
126 uint8 y0 = y_buf[x];
127 uint8 a0 = a_buf[x];
128 ConvertYUVAToARGB_C(y0, u, v, a0, rgba_buf);
129 if ((x + 1) < width) {
130 uint8 y1 = y_buf[x + 1];
131 uint8 a1 = a_buf[x + 1];
132 ConvertYUVAToARGB_C(y1, u, v, a1, rgba_buf + 4);
133 }
134 rgba_buf += 8; // Advance 2 pixels.
135 }
136 }
137
138 // 16.16 fixed point is used. A shift by 16 isolates the integer.
139 // A shift by 17 is used to further subsample the chrominence channels.
140 // & 0xffff isolates the fixed point fraction. >> 2 to get the upper 2 bits,
141 // for 1/65536 pixel accurate interpolation.
ScaleYUVToRGB32Row_C(const uint8 * y_buf,const uint8 * u_buf,const uint8 * v_buf,uint8 * rgb_buf,ptrdiff_t width,ptrdiff_t source_dx)142 void ScaleYUVToRGB32Row_C(const uint8* y_buf,
143 const uint8* u_buf,
144 const uint8* v_buf,
145 uint8* rgb_buf,
146 ptrdiff_t width,
147 ptrdiff_t source_dx) {
148 int x = 0;
149 for (int i = 0; i < width; i += 2) {
150 int y = y_buf[x >> 16];
151 int u = u_buf[(x >> 17)];
152 int v = v_buf[(x >> 17)];
153 ConvertYUVToRGB32_C(y, u, v, rgb_buf);
154 x += source_dx;
155 if ((i + 1) < width) {
156 y = y_buf[x >> 16];
157 ConvertYUVToRGB32_C(y, u, v, rgb_buf+4);
158 x += source_dx;
159 }
160 rgb_buf += 8;
161 }
162 }
163
LinearScaleYUVToRGB32Row_C(const uint8 * y_buf,const uint8 * u_buf,const uint8 * v_buf,uint8 * rgb_buf,ptrdiff_t width,ptrdiff_t source_dx)164 void LinearScaleYUVToRGB32Row_C(const uint8* y_buf,
165 const uint8* u_buf,
166 const uint8* v_buf,
167 uint8* rgb_buf,
168 ptrdiff_t width,
169 ptrdiff_t source_dx) {
170 // Avoid point-sampling for down-scaling by > 2:1.
171 int source_x = 0;
172 if (source_dx >= 0x20000)
173 source_x += 0x8000;
174 LinearScaleYUVToRGB32RowWithRange_C(y_buf, u_buf, v_buf, rgb_buf, width,
175 source_x, source_dx);
176 }
177
LinearScaleYUVToRGB32RowWithRange_C(const uint8 * y_buf,const uint8 * u_buf,const uint8 * v_buf,uint8 * rgb_buf,int dest_width,int x,int source_dx)178 void LinearScaleYUVToRGB32RowWithRange_C(const uint8* y_buf,
179 const uint8* u_buf,
180 const uint8* v_buf,
181 uint8* rgb_buf,
182 int dest_width,
183 int x,
184 int source_dx) {
185 for (int i = 0; i < dest_width; i += 2) {
186 int y0 = y_buf[x >> 16];
187 int y1 = y_buf[(x >> 16) + 1];
188 int u0 = u_buf[(x >> 17)];
189 int u1 = u_buf[(x >> 17) + 1];
190 int v0 = v_buf[(x >> 17)];
191 int v1 = v_buf[(x >> 17) + 1];
192 int y_frac = (x & 65535);
193 int uv_frac = ((x >> 1) & 65535);
194 int y = (y_frac * y1 + (y_frac ^ 65535) * y0) >> 16;
195 int u = (uv_frac * u1 + (uv_frac ^ 65535) * u0) >> 16;
196 int v = (uv_frac * v1 + (uv_frac ^ 65535) * v0) >> 16;
197 ConvertYUVToRGB32_C(y, u, v, rgb_buf);
198 x += source_dx;
199 if ((i + 1) < dest_width) {
200 y0 = y_buf[x >> 16];
201 y1 = y_buf[(x >> 16) + 1];
202 y_frac = (x & 65535);
203 y = (y_frac * y1 + (y_frac ^ 65535) * y0) >> 16;
204 ConvertYUVToRGB32_C(y, u, v, rgb_buf+4);
205 x += source_dx;
206 }
207 rgb_buf += 8;
208 }
209 }
210
ConvertYUVToRGB32_C(const uint8 * yplane,const uint8 * uplane,const uint8 * vplane,uint8 * rgbframe,int width,int height,int ystride,int uvstride,int rgbstride,YUVType yuv_type)211 void ConvertYUVToRGB32_C(const uint8* yplane,
212 const uint8* uplane,
213 const uint8* vplane,
214 uint8* rgbframe,
215 int width,
216 int height,
217 int ystride,
218 int uvstride,
219 int rgbstride,
220 YUVType yuv_type) {
221 unsigned int y_shift = yuv_type;
222 for (int y = 0; y < height; ++y) {
223 uint8* rgb_row = rgbframe + y * rgbstride;
224 const uint8* y_ptr = yplane + y * ystride;
225 const uint8* u_ptr = uplane + (y >> y_shift) * uvstride;
226 const uint8* v_ptr = vplane + (y >> y_shift) * uvstride;
227
228 ConvertYUVToRGB32Row_C(y_ptr,
229 u_ptr,
230 v_ptr,
231 rgb_row,
232 width);
233 }
234 }
235
ConvertYUVAToARGB_C(const uint8 * yplane,const uint8 * uplane,const uint8 * vplane,const uint8 * aplane,uint8 * rgbaframe,int width,int height,int ystride,int uvstride,int astride,int rgbastride,YUVType yuv_type)236 void ConvertYUVAToARGB_C(const uint8* yplane,
237 const uint8* uplane,
238 const uint8* vplane,
239 const uint8* aplane,
240 uint8* rgbaframe,
241 int width,
242 int height,
243 int ystride,
244 int uvstride,
245 int astride,
246 int rgbastride,
247 YUVType yuv_type) {
248 unsigned int y_shift = yuv_type;
249 for (int y = 0; y < height; y++) {
250 uint8* rgba_row = rgbaframe + y * rgbastride;
251 const uint8* y_ptr = yplane + y * ystride;
252 const uint8* u_ptr = uplane + (y >> y_shift) * uvstride;
253 const uint8* v_ptr = vplane + (y >> y_shift) * uvstride;
254 const uint8* a_ptr = aplane + y * astride;
255
256 ConvertYUVAToARGBRow_C(y_ptr,
257 u_ptr,
258 v_ptr,
259 a_ptr,
260 rgba_row,
261 width);
262 }
263 }
264
265 } // namespace media
266