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simple_idct_template.c
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1/*
2 * Simple IDCT
3 *
4 * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23/**
24 * @file
25 * simpleidct in C.
26 */
27
28/* Based upon some commented-out C code from mpeg2dec (idct_mmx.c
29 * written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>). */
30
31#include "bit_depth_template.c"
32
33#undef W1
34#undef W2
35#undef W3
36#undef W4
37#undef W5
38#undef W6
39#undef W7
40#undef ROW_SHIFT
41#undef COL_SHIFT
42#undef DC_SHIFT
43#undef MUL
44#undef MAC
45
46#if BIT_DEPTH == 8
47
48#define W1 22725 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
49#define W2 21407 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
50#define W3 19266 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
51#define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
52#define W5 12873 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
53#define W6 8867 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
54#define W7 4520 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
55
56#define ROW_SHIFT 11
57#define COL_SHIFT 20
58#define DC_SHIFT 3
59
60#define MUL(a, b) MUL16(a, b)
61#define MAC(a, b, c) MAC16(a, b, c)
62
63#elif BIT_DEPTH == 10 || BIT_DEPTH == 12
64
65# if BIT_DEPTH == 10
66#define W1 22725 // 90901
67#define W2 21407 // 85627
68#define W3 19265 // 77062
69#define W4 16384 // 65535
70#define W5 12873 // 51491
71#define W6 8867 // 35468
72#define W7 4520 // 18081
73
74# ifdef EXTRA_SHIFT
75#define ROW_SHIFT 13
76#define COL_SHIFT 18
77#define DC_SHIFT 1
78# elif IN_IDCT_DEPTH == 32
79#define ROW_SHIFT 13
80#define COL_SHIFT 21
81#define DC_SHIFT 2
82# else
83#define ROW_SHIFT 12
84#define COL_SHIFT 19
85#define DC_SHIFT 2
86# endif
87
88# else
89#define W1 45451
90#define W2 42813
91#define W3 38531
92#define W4 32767
93#define W5 25746
94#define W6 17734
95#define W7 9041
96
97#define ROW_SHIFT 16
98#define COL_SHIFT 17
99#define DC_SHIFT -1
100# endif
101
102#define MUL(a, b) ((int)((SUINT)(a) * (b)))
103#define MAC(a, b, c) ((a) += (SUINT)(b) * (c))
104
105#else
106
107#error "Unsupported bitdepth"
108
109#endif
110
111#ifdef EXTRA_SHIFT
112static inline void FUNC(idctRowCondDC_extrashift)(int16_t *row, int extra_shift)
113#else
114static inline void FUNC6(idctRowCondDC)(idctin *row, int extra_shift)
115#endif
116{
117 SUINT a0, a1, a2, a3, b0, b1, b2, b3;
118
119// TODO: Add DC-only support for int32_t input
120#if IN_IDCT_DEPTH == 16
121#if HAVE_FAST_64BIT
122#define ROW0_MASK (0xffffULL << 48 * HAVE_BIGENDIAN)
123 if (((AV_RN64A(row) & ~ROW0_MASK) | AV_RN64A(row+4)) == 0) {
124 uint64_t temp;
125 if (DC_SHIFT - extra_shift >= 0) {
126 temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff;
127 } else {
128 temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff;
129 }
130 temp += temp * (1 << 16);
131 temp += temp * ((uint64_t) 1 << 32);
132 AV_WN64A(row, temp);
133 AV_WN64A(row + 4, temp);
134 return;
135 }
136#else
137 if (!(AV_RN32A(row+2) |
138 AV_RN32A(row+4) |
139 AV_RN32A(row+6) |
140 row[1])) {
141 uint32_t temp;
142 if (DC_SHIFT - extra_shift >= 0) {
143 temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff;
144 } else {
145 temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff;
146 }
147 temp += temp * (1 << 16);
148 AV_WN32A(row, temp);
149 AV_WN32A(row+2, temp);
150 AV_WN32A(row+4, temp);
151 AV_WN32A(row+6, temp);
152 return;
153 }
154#endif
155#endif
156
157 a0 = ((SUINT)W4 * row[0]) + (1 << (ROW_SHIFT + extra_shift - 1));
158 a1 = a0;
159 a2 = a0;
160 a3 = a0;
161
162 a0 += (SUINT)W2 * row[2];
163 a1 += (SUINT)W6 * row[2];
164 a2 -= (SUINT)W6 * row[2];
165 a3 -= (SUINT)W2 * row[2];
166
167 b0 = MUL(W1, row[1]);
168 MAC(b0, W3, row[3]);
169 b1 = MUL(W3, row[1]);
170 MAC(b1, -W7, row[3]);
171 b2 = MUL(W5, row[1]);
172 MAC(b2, -W1, row[3]);
173 b3 = MUL(W7, row[1]);
174 MAC(b3, -W5, row[3]);
175
176#if IN_IDCT_DEPTH == 32
177 if (AV_RN64A(row + 4) | AV_RN64A(row + 6)) {
178#else
179 if (AV_RN64A(row + 4)) {
180#endif
181 a0 += (SUINT) W4*row[4] + (SUINT)W6*row[6];
182 a1 += (SUINT)- W4*row[4] - (SUINT)W2*row[6];
183 a2 += (SUINT)- W4*row[4] + (SUINT)W2*row[6];
184 a3 += (SUINT) W4*row[4] - (SUINT)W6*row[6];
185
186 MAC(b0, W5, row[5]);
187 MAC(b0, W7, row[7]);
188
189 MAC(b1, -W1, row[5]);
190 MAC(b1, -W5, row[7]);
191
192 MAC(b2, W7, row[5]);
193 MAC(b2, W3, row[7]);
194
195 MAC(b3, W3, row[5]);
196 MAC(b3, -W1, row[7]);
197 }
198
199 row[0] = (int)(a0 + b0) >> (ROW_SHIFT + extra_shift);
200 row[7] = (int)(a0 - b0) >> (ROW_SHIFT + extra_shift);
201 row[1] = (int)(a1 + b1) >> (ROW_SHIFT + extra_shift);
202 row[6] = (int)(a1 - b1) >> (ROW_SHIFT + extra_shift);
203 row[2] = (int)(a2 + b2) >> (ROW_SHIFT + extra_shift);
204 row[5] = (int)(a2 - b2) >> (ROW_SHIFT + extra_shift);
205 row[3] = (int)(a3 + b3) >> (ROW_SHIFT + extra_shift);
206 row[4] = (int)(a3 - b3) >> (ROW_SHIFT + extra_shift);
207}
208
209#define IDCT_COLS do { \
210 a0 = (SUINT)W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); \
211 a1 = a0; \
212 a2 = a0; \
213 a3 = a0; \
214 \
215 a0 += (SUINT) W2*col[8*2]; \
216 a1 += (SUINT) W6*col[8*2]; \
217 a2 += (SUINT)-W6*col[8*2]; \
218 a3 += (SUINT)-W2*col[8*2]; \
219 \
220 b0 = MUL(W1, col[8*1]); \
221 b1 = MUL(W3, col[8*1]); \
222 b2 = MUL(W5, col[8*1]); \
223 b3 = MUL(W7, col[8*1]); \
224 \
225 MAC(b0, W3, col[8*3]); \
226 MAC(b1, -W7, col[8*3]); \
227 MAC(b2, -W1, col[8*3]); \
228 MAC(b3, -W5, col[8*3]); \
229 \
230 if (col[8*4]) { \
231 a0 += (SUINT) W4*col[8*4]; \
232 a1 += (SUINT)-W4*col[8*4]; \
233 a2 += (SUINT)-W4*col[8*4]; \
234 a3 += (SUINT) W4*col[8*4]; \
235 } \
236 \
237 if (col[8*5]) { \
238 MAC(b0, W5, col[8*5]); \
239 MAC(b1, -W1, col[8*5]); \
240 MAC(b2, W7, col[8*5]); \
241 MAC(b3, W3, col[8*5]); \
242 } \
243 \
244 if (col[8*6]) { \
245 a0 += (SUINT) W6*col[8*6]; \
246 a1 += (SUINT)-W2*col[8*6]; \
247 a2 += (SUINT) W2*col[8*6]; \
248 a3 += (SUINT)-W6*col[8*6]; \
249 } \
250 \
251 if (col[8*7]) { \
252 MAC(b0, W7, col[8*7]); \
253 MAC(b1, -W5, col[8*7]); \
254 MAC(b2, W3, col[8*7]); \
255 MAC(b3, -W1, col[8*7]); \
256 } \
257 } while (0)
258
259#ifdef EXTRA_SHIFT
260static inline void FUNC(idctSparseCol_extrashift)(int16_t *col)
261#else
262static inline void FUNC6(idctSparseCol)(idctin *col)
263#endif
264{
265 unsigned a0, a1, a2, a3, b0, b1, b2, b3;
266
267 IDCT_COLS;
268
269 col[0 ] = ((int)(a0 + b0) >> COL_SHIFT);
270 col[8 ] = ((int)(a1 + b1) >> COL_SHIFT);
271 col[16] = ((int)(a2 + b2) >> COL_SHIFT);
272 col[24] = ((int)(a3 + b3) >> COL_SHIFT);
273 col[32] = ((int)(a3 - b3) >> COL_SHIFT);
274 col[40] = ((int)(a2 - b2) >> COL_SHIFT);
275 col[48] = ((int)(a1 - b1) >> COL_SHIFT);
276 col[56] = ((int)(a0 - b0) >> COL_SHIFT);
277}
278
279#ifndef PRORES_ONLY
280#ifndef EXTRA_SHIFT
281static inline void FUNC6(idctSparseColPut)(pixel *dest, ptrdiff_t line_size,
282 idctin *col)
283{
284 SUINT a0, a1, a2, a3, b0, b1, b2, b3;
285
286 IDCT_COLS;
287
288 dest[0] = av_clip_pixel((int)(a0 + b0) >> COL_SHIFT);
289 dest += line_size;
290 dest[0] = av_clip_pixel((int)(a1 + b1) >> COL_SHIFT);
291 dest += line_size;
292 dest[0] = av_clip_pixel((int)(a2 + b2) >> COL_SHIFT);
293 dest += line_size;
294 dest[0] = av_clip_pixel((int)(a3 + b3) >> COL_SHIFT);
295 dest += line_size;
296 dest[0] = av_clip_pixel((int)(a3 - b3) >> COL_SHIFT);
297 dest += line_size;
298 dest[0] = av_clip_pixel((int)(a2 - b2) >> COL_SHIFT);
299 dest += line_size;
300 dest[0] = av_clip_pixel((int)(a1 - b1) >> COL_SHIFT);
301 dest += line_size;
302 dest[0] = av_clip_pixel((int)(a0 - b0) >> COL_SHIFT);
303}
304
305static inline void FUNC6(idctSparseColAdd)(pixel *dest, ptrdiff_t line_size,
306 idctin *col)
307{
308 unsigned a0, a1, a2, a3, b0, b1, b2, b3;
309
310 IDCT_COLS;
311
312 dest[0] = av_clip_pixel(dest[0] + ((int)(a0 + b0) >> COL_SHIFT));
313 dest += line_size;
314 dest[0] = av_clip_pixel(dest[0] + ((int)(a1 + b1) >> COL_SHIFT));
315 dest += line_size;
316 dest[0] = av_clip_pixel(dest[0] + ((int)(a2 + b2) >> COL_SHIFT));
317 dest += line_size;
318 dest[0] = av_clip_pixel(dest[0] + ((int)(a3 + b3) >> COL_SHIFT));
319 dest += line_size;
320 dest[0] = av_clip_pixel(dest[0] + ((int)(a3 - b3) >> COL_SHIFT));
321 dest += line_size;
322 dest[0] = av_clip_pixel(dest[0] + ((int)(a2 - b2) >> COL_SHIFT));
323 dest += line_size;
324 dest[0] = av_clip_pixel(dest[0] + ((int)(a1 - b1) >> COL_SHIFT));
325 dest += line_size;
326 dest[0] = av_clip_pixel(dest[0] + ((int)(a0 - b0) >> COL_SHIFT));
327}
328
329void FUNC6(ff_simple_idct_put)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block_)
330{
331 idctin *block = (idctin *)block_;
332 pixel *dest = (pixel *)dest_;
333 int i;
334
335 line_size /= sizeof(pixel);
336
337 for (i = 0; i < 8; i++)
338 FUNC6(idctRowCondDC)(block + i*8, 0);
339
340 for (i = 0; i < 8; i++)
341 FUNC6(idctSparseColPut)(dest + i, line_size, block + i);
342}
343
344#if IN_IDCT_DEPTH == 16
345void FUNC6(ff_simple_idct_add)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block)
346{
347 pixel *dest = (pixel *)dest_;
348 int i;
349
350 line_size /= sizeof(pixel);
351
352 for (i = 0; i < 8; i++)
353 FUNC6(idctRowCondDC)(block + i*8, 0);
354
355 for (i = 0; i < 8; i++)
356 FUNC6(idctSparseColAdd)(dest + i, line_size, block + i);
357}
358
359void FUNC6(ff_simple_idct)(int16_t *block)
360{
361 int i;
362
363 for (i = 0; i < 8; i++)
364 FUNC6(idctRowCondDC)(block + i*8, 0);
365
366 for (i = 0; i < 8; i++)
367 FUNC6(idctSparseCol)(block + i);
368}
369#endif
370#endif
371#endif /* PRORES_ONLY */
MUL
#define MUL(X, Y)
Definition binkdsp.c:35
bit_depth_template.c
idctin
#define idctin
Definition bit_depth_template.c:86
av_clip_pixel
#define av_clip_pixel(a)
Definition bit_depth_template.c:98
FUNC
#define FUNC(a)
Definition bit_depth_template.c:104
FUNC6
#define FUNC6(a)
Definition bit_depth_template.c:109
pixel
#define pixel
Definition bit_depth_template.c:82
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
SUINT
#define SUINT
Definition dct32_template.c:30
block
static int16_t block[64]
Definition dct.c:125
AV_WN32A
#define AV_WN32A(p, v)
Definition intreadwrite.h:534
AV_RN32A
#define AV_RN32A(p)
Definition intreadwrite.h:522
AV_WN64A
#define AV_WN64A(p, v)
Definition intreadwrite.h:538
AV_RN64A
#define AV_RN64A(p)
Definition intreadwrite.h:526
COL_SHIFT
#define COL_SHIFT
Definition simple_idct_mmi.c:40
W3
#define W3
Definition simple_idct_mmi.c:33
W6
#define W6
Definition simple_idct_mmi.c:36
DC_SHIFT
#define DC_SHIFT
Definition simple_idct_mmi.c:41
ROW_SHIFT
#define ROW_SHIFT
Definition simple_idct_mmi.c:39
W5
#define W5
Definition simple_idct_mmi.c:35
W7
#define W7
Definition simple_idct_mmi.c:37
W1
#define W1
Definition simple_idct_mmi.c:31
W2
#define W2
Definition simple_idct_mmi.c:32
W4
#define W4
Definition simple_idct_mmi.c:34
ff_simple_idct_put
void FUNC6 ff_simple_idct_put(uint8_t *dest_, ptrdiff_t line_size, int16_t *block_)
Definition simple_idct_template.c:329
idctRowCondDC
static void FUNC6 idctRowCondDC(idctin *row, int extra_shift)
Definition simple_idct_template.c:114
IDCT_COLS
#define IDCT_COLS
Definition simple_idct_template.c:209
idctSparseColAdd
static void FUNC6 idctSparseColAdd(pixel *dest, ptrdiff_t line_size, idctin *col)
Definition simple_idct_template.c:305
idctSparseColPut
static void FUNC6 idctSparseColPut(pixel *dest, ptrdiff_t line_size, idctin *col)
Definition simple_idct_template.c:281
idctSparseCol
static void FUNC6 idctSparseCol(idctin *col)
Definition simple_idct_template.c:262
temp
else temp
Definition vf_mcdeint.c:275
b1
static double b1(void *priv, double x, double y)
Definition vf_xfade.c:2034
a0
static double a0(void *priv, double x, double y)
Definition vf_xfade.c:2028
b2
static double b2(void *priv, double x, double y)
Definition vf_xfade.c:2035
b3
static double b3(void *priv, double x, double y)
Definition vf_xfade.c:2036
a3
static double a3(void *priv, double x, double y)
Definition vf_xfade.c:2031
b0
static double b0(void *priv, double x, double y)
Definition vf_xfade.c:2033
a2
static double a2(void *priv, double x, double y)
Definition vf_xfade.c:2030
a1
static double a1(void *priv, double x, double y)
Definition vf_xfade.c:2029
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