1 /*
2 * MPEG video MMX templates
3 *
4 * Copyright (c) 2002 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 #include <stdint.h>
24
25 #include "libavutil/internal.h"
26 #include "libavutil/x86/asm.h"
27 #include "libavcodec/mpegutils.h"
28 #include "libavcodec/mpegvideo.h"
29 #include "fdct.h"
30
31 #undef MMREG_WIDTH
32 #undef MM
33 #undef MOVQ
34 #undef SPREADW
35 #undef PMAXW
36 #undef PMAX
37 #undef SAVE_SIGN
38 #undef RESTORE_SIGN
39
40 #if COMPILE_TEMPLATE_SSE2
41 #define MMREG_WIDTH "16"
42 #define MM "%%xmm"
43 #define MOVQ "movdqa"
44 #define SPREADW(a) \
45 "pshuflw $0, "a", "a" \n\t"\
46 "punpcklwd "a", "a" \n\t"
47 #define PMAXW(a,b) "pmaxsw "a", "b" \n\t"
48 #define PMAX(a,b) \
49 "movhlps "a", "b" \n\t"\
50 PMAXW(b, a)\
51 "pshuflw $0x0E, "a", "b" \n\t"\
52 PMAXW(b, a)\
53 "pshuflw $0x01, "a", "b" \n\t"\
54 PMAXW(b, a)
55 #else
56 #define MMREG_WIDTH "8"
57 #define MM "%%mm"
58 #define MOVQ "movq"
59 #if COMPILE_TEMPLATE_MMXEXT
60 #define SPREADW(a) "pshufw $0, "a", "a" \n\t"
61 #define PMAXW(a,b) "pmaxsw "a", "b" \n\t"
62 #define PMAX(a,b) \
63 "pshufw $0x0E, "a", "b" \n\t"\
64 PMAXW(b, a)\
65 "pshufw $0x01, "a", "b" \n\t"\
66 PMAXW(b, a)
67 #else
68 #define SPREADW(a) \
69 "punpcklwd "a", "a" \n\t"\
70 "punpcklwd "a", "a" \n\t"
71 #define PMAXW(a,b) \
72 "psubusw "a", "b" \n\t"\
73 "paddw "a", "b" \n\t"
74 #define PMAX(a,b) \
75 "movq "a", "b" \n\t"\
76 "psrlq $32, "a" \n\t"\
77 PMAXW(b, a)\
78 "movq "a", "b" \n\t"\
79 "psrlq $16, "a" \n\t"\
80 PMAXW(b, a)
81
82 #endif
83 #endif
84
85 #if COMPILE_TEMPLATE_SSSE3
86 #define SAVE_SIGN(a,b) \
87 "movdqa "b", "a" \n\t"\
88 "pabsw "b", "b" \n\t"
89 #define RESTORE_SIGN(a,b) \
90 "psignw "a", "b" \n\t"
91 #else
92 #define SAVE_SIGN(a,b) \
93 "pxor "a", "a" \n\t"\
94 "pcmpgtw "b", "a" \n\t" /* block[i] <= 0 ? 0xFF : 0x00 */\
95 "pxor "a", "b" \n\t"\
96 "psubw "a", "b" \n\t" /* ABS(block[i]) */
97 #define RESTORE_SIGN(a,b) \
98 "pxor "a", "b" \n\t"\
99 "psubw "a", "b" \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
100 #endif
101
RENAME(dct_quantize)102 static int RENAME(dct_quantize)(MpegEncContext *s,
103 int16_t *block, int n,
104 int qscale, int *overflow)
105 {
106 x86_reg last_non_zero_p1;
107 int level=0, q; //=0 is because gcc says uninitialized ...
108 const uint16_t *qmat, *bias;
109 LOCAL_ALIGNED_16(int16_t, temp_block, [64]);
110
111 av_assert2((7&(int)(&temp_block[0])) == 0); //did gcc align it correctly?
112
113 //s->fdct (block);
114 RENAME_FDCT(ff_fdct)(block); // cannot be anything else ...
115
116 if(s->dct_error_sum)
117 s->denoise_dct(s, block);
118
119 if (s->mb_intra) {
120 int dummy;
121 if (n < 4){
122 q = s->y_dc_scale;
123 bias = s->q_intra_matrix16[qscale][1];
124 qmat = s->q_intra_matrix16[qscale][0];
125 }else{
126 q = s->c_dc_scale;
127 bias = s->q_chroma_intra_matrix16[qscale][1];
128 qmat = s->q_chroma_intra_matrix16[qscale][0];
129 }
130 /* note: block[0] is assumed to be positive */
131 if (!s->h263_aic) {
132 __asm__ volatile (
133 "mul %%ecx \n\t"
134 : "=d" (level), "=a"(dummy)
135 : "a" ((block[0]>>2) + q), "c" (ff_inverse[q<<1])
136 );
137 } else
138 /* For AIC we skip quant/dequant of INTRADC */
139 level = (block[0] + 4)>>3;
140
141 block[0]=0; //avoid fake overflow
142 // temp_block[0] = (block[0] + (q >> 1)) / q;
143 last_non_zero_p1 = 1;
144 } else {
145 last_non_zero_p1 = 0;
146 bias = s->q_inter_matrix16[qscale][1];
147 qmat = s->q_inter_matrix16[qscale][0];
148 }
149
150 if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
151
152 __asm__ volatile(
153 "movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
154 SPREADW(MM"3")
155 "pxor "MM"7, "MM"7 \n\t" // 0
156 "pxor "MM"4, "MM"4 \n\t" // 0
157 MOVQ" (%2), "MM"5 \n\t" // qmat[0]
158 "pxor "MM"6, "MM"6 \n\t"
159 "psubw (%3), "MM"6 \n\t" // -bias[0]
160 "mov $-128, %%"FF_REG_a" \n\t"
161 ".p2align 4 \n\t"
162 "1: \n\t"
163 MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
164 SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
165 "psubusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
166 "pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
167 "por "MM"0, "MM"4 \n\t"
168 RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
169 MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
170 "pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
171 MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
172 MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
173 "pandn "MM"1, "MM"0 \n\t"
174 PMAXW(MM"0", MM"3")
175 "add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
176 " js 1b \n\t"
177 PMAX(MM"3", MM"0")
178 "movd "MM"3, %%"FF_REG_a" \n\t"
179 "movzbl %%al, %%eax \n\t" // last_non_zero_p1
180 : "+a" (last_non_zero_p1)
181 : "r" (block+64), "r" (qmat), "r" (bias),
182 "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
183 XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
184 "%xmm4", "%xmm5", "%xmm6", "%xmm7")
185 );
186 }else{ // FMT_H263
187 __asm__ volatile(
188 "movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
189 SPREADW(MM"3")
190 "pxor "MM"7, "MM"7 \n\t" // 0
191 "pxor "MM"4, "MM"4 \n\t" // 0
192 "mov $-128, %%"FF_REG_a" \n\t"
193 ".p2align 4 \n\t"
194 "1: \n\t"
195 MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
196 SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
197 MOVQ" (%3, %%"FF_REG_a"), "MM"6 \n\t" // bias[0]
198 "paddusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
199 MOVQ" (%2, %%"FF_REG_a"), "MM"5 \n\t" // qmat[i]
200 "pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
201 "por "MM"0, "MM"4 \n\t"
202 RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
203 MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
204 "pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
205 MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
206 MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
207 "pandn "MM"1, "MM"0 \n\t"
208 PMAXW(MM"0", MM"3")
209 "add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
210 " js 1b \n\t"
211 PMAX(MM"3", MM"0")
212 "movd "MM"3, %%"FF_REG_a" \n\t"
213 "movzbl %%al, %%eax \n\t" // last_non_zero_p1
214 : "+a" (last_non_zero_p1)
215 : "r" (block+64), "r" (qmat+64), "r" (bias+64),
216 "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
217 XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
218 "%xmm4", "%xmm5", "%xmm6", "%xmm7")
219 );
220 }
221 __asm__ volatile(
222 "movd %1, "MM"1 \n\t" // max_qcoeff
223 SPREADW(MM"1")
224 "psubusw "MM"1, "MM"4 \n\t"
225 "packuswb "MM"4, "MM"4 \n\t"
226 #if COMPILE_TEMPLATE_SSE2
227 "packsswb "MM"4, "MM"4 \n\t"
228 #endif
229 "movd "MM"4, %0 \n\t" // *overflow
230 : "=g" (*overflow)
231 : "g" (s->max_qcoeff)
232 );
233
234 if(s->mb_intra) block[0]= level;
235 else block[0]= temp_block[0];
236
237 if (s->idsp.perm_type == FF_IDCT_PERM_SIMPLE) {
238 if(last_non_zero_p1 <= 1) goto end;
239 block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
240 block[0x20] = temp_block[0x10];
241 if(last_non_zero_p1 <= 4) goto end;
242 block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
243 block[0x09] = temp_block[0x03];
244 if(last_non_zero_p1 <= 7) goto end;
245 block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
246 block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
247 if(last_non_zero_p1 <= 11) goto end;
248 block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
249 block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
250 block[0x0C] = temp_block[0x05];
251 if(last_non_zero_p1 <= 16) goto end;
252 block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
253 block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
254 block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
255 block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
256 if(last_non_zero_p1 <= 24) goto end;
257 block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
258 block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
259 block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
260 block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
261 if(last_non_zero_p1 <= 32) goto end;
262 block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
263 block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
264 block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
265 block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
266 if(last_non_zero_p1 <= 40) goto end;
267 block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
268 block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
269 block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
270 block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
271 if(last_non_zero_p1 <= 48) goto end;
272 block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
273 block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
274 block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
275 block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
276 if(last_non_zero_p1 <= 56) goto end;
277 block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
278 block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
279 block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
280 block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
281 }else if(s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2){
282 if(last_non_zero_p1 <= 1) goto end;
283 block[0x04] = temp_block[0x01];
284 block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
285 if(last_non_zero_p1 <= 4) goto end;
286 block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
287 block[0x05] = temp_block[0x03];
288 if(last_non_zero_p1 <= 7) goto end;
289 block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
290 block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
291 if(last_non_zero_p1 <= 11) goto end;
292 block[0x1C] = temp_block[0x19];
293 block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
294 block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
295 if(last_non_zero_p1 <= 16) goto end;
296 block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
297 block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
298 block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
299 block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
300 if(last_non_zero_p1 <= 24) goto end;
301 block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
302 block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
303 block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
304 block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
305 if(last_non_zero_p1 <= 32) goto end;
306 block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
307 block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
308 block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
309 block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
310 if(last_non_zero_p1 <= 40) goto end;
311 block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
312 block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
313 block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
314 block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
315 if(last_non_zero_p1 <= 48) goto end;
316 block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
317 block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
318 block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
319 block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
320 if(last_non_zero_p1 <= 56) goto end;
321 block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
322 block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
323 block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
324 block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
325 } else if (s->idsp.perm_type == FF_IDCT_PERM_NONE) {
326 if(last_non_zero_p1 <= 1) goto end;
327 block[0x01] = temp_block[0x01];
328 block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
329 if(last_non_zero_p1 <= 4) goto end;
330 block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
331 block[0x03] = temp_block[0x03];
332 if(last_non_zero_p1 <= 7) goto end;
333 block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
334 block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
335 if(last_non_zero_p1 <= 11) goto end;
336 block[0x19] = temp_block[0x19];
337 block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
338 block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
339 if(last_non_zero_p1 <= 16) goto end;
340 block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
341 block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
342 block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
343 block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
344 if(last_non_zero_p1 <= 24) goto end;
345 block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
346 block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
347 block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
348 block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
349 if(last_non_zero_p1 <= 32) goto end;
350 block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
351 block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
352 block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
353 block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
354 if(last_non_zero_p1 <= 40) goto end;
355 block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
356 block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
357 block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
358 block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
359 if(last_non_zero_p1 <= 48) goto end;
360 block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
361 block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
362 block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
363 block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
364 if(last_non_zero_p1 <= 56) goto end;
365 block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
366 block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
367 block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
368 block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
369 } else if (s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE) {
370 if(last_non_zero_p1 <= 1) goto end;
371 block[0x08] = temp_block[0x01];
372 block[0x01] = temp_block[0x08]; block[0x02] = temp_block[0x10];
373 if(last_non_zero_p1 <= 4) goto end;
374 block[0x09] = temp_block[0x09]; block[0x10] = temp_block[0x02];
375 block[0x18] = temp_block[0x03];
376 if(last_non_zero_p1 <= 7) goto end;
377 block[0x11] = temp_block[0x0A]; block[0x0A] = temp_block[0x11];
378 block[0x03] = temp_block[0x18]; block[0x04] = temp_block[0x20];
379 if(last_non_zero_p1 <= 11) goto end;
380 block[0x0B] = temp_block[0x19];
381 block[0x12] = temp_block[0x12]; block[0x19] = temp_block[0x0B];
382 block[0x20] = temp_block[0x04]; block[0x28] = temp_block[0x05];
383 if(last_non_zero_p1 <= 16) goto end;
384 block[0x21] = temp_block[0x0C]; block[0x1A] = temp_block[0x13];
385 block[0x13] = temp_block[0x1A]; block[0x0C] = temp_block[0x21];
386 block[0x05] = temp_block[0x28]; block[0x06] = temp_block[0x30];
387 block[0x0D] = temp_block[0x29]; block[0x14] = temp_block[0x22];
388 if(last_non_zero_p1 <= 24) goto end;
389 block[0x1B] = temp_block[0x1B]; block[0x22] = temp_block[0x14];
390 block[0x29] = temp_block[0x0D]; block[0x30] = temp_block[0x06];
391 block[0x38] = temp_block[0x07]; block[0x31] = temp_block[0x0E];
392 block[0x2A] = temp_block[0x15]; block[0x23] = temp_block[0x1C];
393 if(last_non_zero_p1 <= 32) goto end;
394 block[0x1C] = temp_block[0x23]; block[0x15] = temp_block[0x2A];
395 block[0x0E] = temp_block[0x31]; block[0x07] = temp_block[0x38];
396 block[0x0F] = temp_block[0x39]; block[0x16] = temp_block[0x32];
397 block[0x1D] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
398 if(last_non_zero_p1 <= 40) goto end;
399 block[0x2B] = temp_block[0x1D]; block[0x32] = temp_block[0x16];
400 block[0x39] = temp_block[0x0F]; block[0x3A] = temp_block[0x17];
401 block[0x33] = temp_block[0x1E]; block[0x2C] = temp_block[0x25];
402 block[0x25] = temp_block[0x2C]; block[0x1E] = temp_block[0x33];
403 if(last_non_zero_p1 <= 48) goto end;
404 block[0x17] = temp_block[0x3A]; block[0x1F] = temp_block[0x3B];
405 block[0x26] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
406 block[0x34] = temp_block[0x26]; block[0x3B] = temp_block[0x1F];
407 block[0x3C] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
408 if(last_non_zero_p1 <= 56) goto end;
409 block[0x2E] = temp_block[0x35]; block[0x27] = temp_block[0x3C];
410 block[0x2F] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
411 block[0x3D] = temp_block[0x2F]; block[0x3E] = temp_block[0x37];
412 block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
413 } else {
414 av_log(s, AV_LOG_DEBUG, "s->idsp.perm_type: %d\n",
415 (int)s->idsp.perm_type);
416 av_assert0(s->idsp.perm_type == FF_IDCT_PERM_NONE ||
417 s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2 ||
418 s->idsp.perm_type == FF_IDCT_PERM_SIMPLE ||
419 s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE);
420 }
421 end:
422 return last_non_zero_p1 - 1;
423 }
424