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author | Solomon Peachy <pizza@shaftnet.org> | 2021-08-04 09:49:56 -0400 |
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committer | Solomon Peachy <pizza@shaftnet.org> | 2022-10-02 11:57:20 -0400 |
commit | d25d24812e8120c0eb133a412287ac030eb185c9 (patch) | |
tree | d1c336d5d81c39366672c86f30c484f96e24a469 /apps/plugins/mpegplayer/libmpeg2/idct.c | |
parent | 9ce5b2a2eda5c7101898476adaa3533e0ba5db82 (diff) | |
download | rockbox-d25d24812e8120c0eb133a412287ac030eb185c9.tar.gz rockbox-d25d24812e8120c0eb133a412287ac030eb185c9.zip |
RFC: Get rid of mpegplayer plugin
It might have made sense once upon a time, but in today's world...
Change-Id: I5d638e6f7a2308c50ab12bd901338f02cf426aae
Diffstat (limited to 'apps/plugins/mpegplayer/libmpeg2/idct.c')
-rw-r--r-- | apps/plugins/mpegplayer/libmpeg2/idct.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/apps/plugins/mpegplayer/libmpeg2/idct.c b/apps/plugins/mpegplayer/libmpeg2/idct.c deleted file mode 100644 index 7f0b9a3c12..0000000000 --- a/apps/plugins/mpegplayer/libmpeg2/idct.c +++ /dev/null | |||
@@ -1,274 +0,0 @@ | |||
1 | /* | ||
2 | * idct.c | ||
3 | * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> | ||
4 | * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> | ||
5 | * | ||
6 | * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. | ||
7 | * See http://libmpeg2.sourceforge.net/ for updates. | ||
8 | * | ||
9 | * mpeg2dec is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License, or | ||
12 | * (at your option) any later version. | ||
13 | * | ||
14 | * mpeg2dec is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU General Public License | ||
20 | * along with this program; if not, write to the Free Software | ||
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
22 | * | ||
23 | * $Id$ | ||
24 | * libmpeg2 sync history: | ||
25 | * 2008-07-01 - CVS revision 1.36 | ||
26 | */ | ||
27 | |||
28 | #include "plugin.h" | ||
29 | |||
30 | #include "mpeg2dec_config.h" | ||
31 | |||
32 | #include "mpeg2.h" | ||
33 | #include "attributes.h" | ||
34 | #include "mpeg2_internal.h" | ||
35 | |||
36 | #if defined(CPU_COLDFIRE) || defined (CPU_ARM) | ||
37 | #define IDCT_ASM | ||
38 | #endif | ||
39 | |||
40 | #ifndef IDCT_ASM | ||
41 | |||
42 | #define W1 2841 /* 2048 * sqrt (2) * cos (1 * pi / 16) */ | ||
43 | #define W2 2676 /* 2048 * sqrt (2) * cos (2 * pi / 16) */ | ||
44 | #define W3 2408 /* 2048 * sqrt (2) * cos (3 * pi / 16) */ | ||
45 | #define W5 1609 /* 2048 * sqrt (2) * cos (5 * pi / 16) */ | ||
46 | #define W6 1108 /* 2048 * sqrt (2) * cos (6 * pi / 16) */ | ||
47 | #define W7 565 /* 2048 * sqrt (2) * cos (7 * pi / 16) */ | ||
48 | |||
49 | /* | ||
50 | * In legal streams, the IDCT output should be between -384 and +384. | ||
51 | * In corrupted streams, it is possible to force the IDCT output to go | ||
52 | * to +-3826 - this is the worst case for a column IDCT where the | ||
53 | * column inputs are 16-bit values. | ||
54 | */ | ||
55 | #define CLIP(i) \ | ||
56 | ({ typeof (i) _i = (i); \ | ||
57 | if ((_i & 0xff) != _i) \ | ||
58 | _i = ~(_i >> (8*sizeof(_i) - 1)); \ | ||
59 | _i; }) | ||
60 | |||
61 | #if 0 | ||
62 | #define BUTTERFLY(t0,t1,W0,W1,d0,d1) \ | ||
63 | do { \ | ||
64 | t0 = W0 * d0 + W1 * d1; \ | ||
65 | t1 = W0 * d1 - W1 * d0; \ | ||
66 | } while (0) | ||
67 | #else | ||
68 | #define BUTTERFLY(t0,t1,W0,W1,d0,d1) \ | ||
69 | do { \ | ||
70 | int tmp = W0 * (d0 + d1); \ | ||
71 | t0 = tmp + (W1 - W0) * d1; \ | ||
72 | t1 = tmp - (W1 + W0) * d0; \ | ||
73 | } while (0) | ||
74 | #endif | ||
75 | |||
76 | static inline void idct_row (int16_t * const block) | ||
77 | { | ||
78 | int d0, d1, d2, d3; | ||
79 | int a0, a1, a2, a3, b0, b1, b2, b3; | ||
80 | int t0, t1, t2, t3; | ||
81 | |||
82 | /* shortcut */ | ||
83 | if (likely (!(block[1] | ((int32_t *)block)[1] | ((int32_t *)block)[2] | | ||
84 | ((int32_t *)block)[3]))) | ||
85 | { | ||
86 | uint32_t tmp = (uint16_t) (block[0] >> 1); | ||
87 | tmp |= tmp << 16; | ||
88 | ((int32_t *)block)[0] = tmp; | ||
89 | ((int32_t *)block)[1] = tmp; | ||
90 | ((int32_t *)block)[2] = tmp; | ||
91 | ((int32_t *)block)[3] = tmp; | ||
92 | return; | ||
93 | } | ||
94 | |||
95 | d0 = (block[0] << 11) + 2048; | ||
96 | d1 = block[1]; | ||
97 | d2 = block[2] << 11; | ||
98 | d3 = block[3]; | ||
99 | t0 = d0 + d2; | ||
100 | t1 = d0 - d2; | ||
101 | BUTTERFLY (t2, t3, W6, W2, d3, d1); | ||
102 | a0 = t0 + t2; | ||
103 | a1 = t1 + t3; | ||
104 | a2 = t1 - t3; | ||
105 | a3 = t0 - t2; | ||
106 | |||
107 | d0 = block[4]; | ||
108 | d1 = block[5]; | ||
109 | d2 = block[6]; | ||
110 | d3 = block[7]; | ||
111 | BUTTERFLY (t0, t1, W7, W1, d3, d0); | ||
112 | BUTTERFLY (t2, t3, W3, W5, d1, d2); | ||
113 | b0 = t0 + t2; | ||
114 | b3 = t1 + t3; | ||
115 | t0 -= t2; | ||
116 | t1 -= t3; | ||
117 | b1 = ((t0 + t1) >> 8) * 181; | ||
118 | b2 = ((t0 - t1) >> 8) * 181; | ||
119 | |||
120 | block[0] = (a0 + b0) >> 12; | ||
121 | block[1] = (a1 + b1) >> 12; | ||
122 | block[2] = (a2 + b2) >> 12; | ||
123 | block[3] = (a3 + b3) >> 12; | ||
124 | block[4] = (a3 - b3) >> 12; | ||
125 | block[5] = (a2 - b2) >> 12; | ||
126 | block[6] = (a1 - b1) >> 12; | ||
127 | block[7] = (a0 - b0) >> 12; | ||
128 | } | ||
129 | |||
130 | static inline void idct_col (int16_t * const block) | ||
131 | { | ||
132 | int d0, d1, d2, d3; | ||
133 | int a0, a1, a2, a3, b0, b1, b2, b3; | ||
134 | int t0, t1, t2, t3; | ||
135 | |||
136 | d0 = (block[8*0] << 11) + 65536; | ||
137 | d1 = block[8*1]; | ||
138 | d2 = block[8*2] << 11; | ||
139 | d3 = block[8*3]; | ||
140 | t0 = d0 + d2; | ||
141 | t1 = d0 - d2; | ||
142 | BUTTERFLY (t2, t3, W6, W2, d3, d1); | ||
143 | a0 = t0 + t2; | ||
144 | a1 = t1 + t3; | ||
145 | a2 = t1 - t3; | ||
146 | a3 = t0 - t2; | ||
147 | |||
148 | d0 = block[8*4]; | ||
149 | d1 = block[8*5]; | ||
150 | d2 = block[8*6]; | ||
151 | d3 = block[8*7]; | ||
152 | BUTTERFLY (t0, t1, W7, W1, d3, d0); | ||
153 | BUTTERFLY (t2, t3, W3, W5, d1, d2); | ||
154 | b0 = t0 + t2; | ||
155 | b3 = t1 + t3; | ||
156 | t0 -= t2; | ||
157 | t1 -= t3; | ||
158 | b1 = ((t0 + t1) >> 8) * 181; | ||
159 | b2 = ((t0 - t1) >> 8) * 181; | ||
160 | |||
161 | block[8*0] = (a0 + b0) >> 17; | ||
162 | block[8*1] = (a1 + b1) >> 17; | ||
163 | block[8*2] = (a2 + b2) >> 17; | ||
164 | block[8*3] = (a3 + b3) >> 17; | ||
165 | block[8*4] = (a3 - b3) >> 17; | ||
166 | block[8*5] = (a2 - b2) >> 17; | ||
167 | block[8*6] = (a1 - b1) >> 17; | ||
168 | block[8*7] = (a0 - b0) >> 17; | ||
169 | } | ||
170 | |||
171 | void mpeg2_idct_copy (int16_t * block, uint8_t * dest, | ||
172 | const int stride) | ||
173 | { | ||
174 | int i; | ||
175 | |||
176 | for (i = 0; i < 8; i++) | ||
177 | idct_row (block + 8 * i); | ||
178 | |||
179 | for (i = 0; i < 8; i++) | ||
180 | idct_col (block + i); | ||
181 | |||
182 | do | ||
183 | { | ||
184 | dest[0] = CLIP (block[0]); | ||
185 | dest[1] = CLIP (block[1]); | ||
186 | dest[2] = CLIP (block[2]); | ||
187 | dest[3] = CLIP (block[3]); | ||
188 | dest[4] = CLIP (block[4]); | ||
189 | dest[5] = CLIP (block[5]); | ||
190 | dest[6] = CLIP (block[6]); | ||
191 | dest[7] = CLIP (block[7]); | ||
192 | |||
193 | ((int32_t *)block)[0] = 0; | ||
194 | ((int32_t *)block)[1] = 0; | ||
195 | ((int32_t *)block)[2] = 0; | ||
196 | ((int32_t *)block)[3] = 0; | ||
197 | |||
198 | dest += stride; | ||
199 | block += 8; | ||
200 | } | ||
201 | while (--i); | ||
202 | } | ||
203 | |||
204 | void mpeg2_idct_add (const int last, int16_t * block, | ||
205 | uint8_t * dest, const int stride) | ||
206 | { | ||
207 | int i; | ||
208 | |||
209 | if (last != 129 || (block[0] & (7 << 4)) == (4 << 4)) | ||
210 | { | ||
211 | for (i = 0; i < 8; i++) | ||
212 | idct_row (block + 8 * i); | ||
213 | |||
214 | for (i = 0; i < 8; i++) | ||
215 | idct_col (block + i); | ||
216 | |||
217 | do | ||
218 | { | ||
219 | dest[0] = CLIP (block[0] + dest[0]); | ||
220 | dest[1] = CLIP (block[1] + dest[1]); | ||
221 | dest[2] = CLIP (block[2] + dest[2]); | ||
222 | dest[3] = CLIP (block[3] + dest[3]); | ||
223 | dest[4] = CLIP (block[4] + dest[4]); | ||
224 | dest[5] = CLIP (block[5] + dest[5]); | ||
225 | dest[6] = CLIP (block[6] + dest[6]); | ||
226 | dest[7] = CLIP (block[7] + dest[7]); | ||
227 | |||
228 | ((int32_t *)block)[0] = 0; | ||
229 | ((int32_t *)block)[1] = 0; | ||
230 | ((int32_t *)block)[2] = 0; | ||
231 | ((int32_t *)block)[3] = 0; | ||
232 | |||
233 | dest += stride; | ||
234 | block += 8; | ||
235 | } | ||
236 | while (--i); | ||
237 | } | ||
238 | else | ||
239 | { | ||
240 | int DC = (block[0] + 64) >> 7; | ||
241 | block[0] = block[63] = 0; | ||
242 | i = 8; | ||
243 | |||
244 | do | ||
245 | { | ||
246 | dest[0] = CLIP (DC + dest[0]); | ||
247 | dest[1] = CLIP (DC + dest[1]); | ||
248 | dest[2] = CLIP (DC + dest[2]); | ||
249 | dest[3] = CLIP (DC + dest[3]); | ||
250 | dest[4] = CLIP (DC + dest[4]); | ||
251 | dest[5] = CLIP (DC + dest[5]); | ||
252 | dest[6] = CLIP (DC + dest[6]); | ||
253 | dest[7] = CLIP (DC + dest[7]); | ||
254 | dest += stride; | ||
255 | } | ||
256 | while (--i); | ||
257 | } | ||
258 | } | ||
259 | |||
260 | #endif /* IDCT_ASM */ | ||
261 | |||
262 | void mpeg2_idct_init (void) | ||
263 | { | ||
264 | int i, j; | ||
265 | |||
266 | for (i = 0; i < 64; i++) | ||
267 | { | ||
268 | j = default_mpeg2_scan_norm[i]; | ||
269 | mpeg2_scan_norm[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2); | ||
270 | |||
271 | j = default_mpeg2_scan_alt[i]; | ||
272 | mpeg2_scan_alt[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2); | ||
273 | } | ||
274 | } | ||