FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/x86/mpegvideoenc_template.c
Date: 2024-11-20 23:03:26
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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/mem_internal.h"
27 #include "libavutil/x86/asm.h"
28 #include "libavcodec/mpegutils.h"
29 #include "libavcodec/mpegvideo.h"
30 #include "fdct.h"
31
32 #undef MMREG_WIDTH
33 #undef MM
34 #undef MOVQ
35 #undef SPREADW
36 #undef PMAXW
37 #undef PMAX
38 #undef SAVE_SIGN
39 #undef RESTORE_SIGN
40
41 #if COMPILE_TEMPLATE_SSE2
42 #define MMREG_WIDTH "16"
43 #define MM "%%xmm"
44 #define MOVQ "movdqa"
45 #define SPREADW(a) \
46 "pshuflw $0, "a", "a" \n\t"\
47 "punpcklwd "a", "a" \n\t"
48 #define PMAXW(a,b) "pmaxsw "a", "b" \n\t"
49 #define PMAX(a,b) \
50 "movhlps "a", "b" \n\t"\
51 PMAXW(b, a)\
52 "pshuflw $0x0E, "a", "b" \n\t"\
53 PMAXW(b, a)\
54 "pshuflw $0x01, "a", "b" \n\t"\
55 PMAXW(b, a)
56 #else
57 #define MMREG_WIDTH "8"
58 #define MM "%%mm"
59 #define MOVQ "movq"
60 #define SPREADW(a) \
61 "punpcklwd "a", "a" \n\t"\
62 "punpcklwd "a", "a" \n\t"
63 #define PMAXW(a,b) \
64 "psubusw "a", "b" \n\t"\
65 "paddw "a", "b" \n\t"
66 #define PMAX(a,b) \
67 "movq "a", "b" \n\t"\
68 "psrlq $32, "a" \n\t"\
69 PMAXW(b, a)\
70 "movq "a", "b" \n\t"\
71 "psrlq $16, "a" \n\t"\
72 PMAXW(b, a)
73
74 #endif
75
76 #if COMPILE_TEMPLATE_SSSE3
77 #define SAVE_SIGN(a,b) \
78 "movdqa "b", "a" \n\t"\
79 "pabsw "b", "b" \n\t"
80 #define RESTORE_SIGN(a,b) \
81 "psignw "a", "b" \n\t"
82 #else
83 #define SAVE_SIGN(a,b) \
84 "pxor "a", "a" \n\t"\
85 "pcmpgtw "b", "a" \n\t" /* block[i] <= 0 ? 0xFF : 0x00 */\
86 "pxor "a", "b" \n\t"\
87 "psubw "a", "b" \n\t" /* ABS(block[i]) */
88 #define RESTORE_SIGN(a,b) \
89 "pxor "a", "b" \n\t"\
90 "psubw "a", "b" \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
91 #endif
92
93 static int RENAME(dct_quantize)(MpegEncContext *s,
94 int16_t *block, int n,
95 int qscale, int *overflow)
96 {
97 x86_reg last_non_zero_p1;
98 int level=0, q; //=0 is because gcc says uninitialized ...
99 const uint16_t *qmat, *bias;
100 LOCAL_ALIGNED_16(int16_t, temp_block, [64]);
101
102 //s->fdct (block);
103 RENAME_FDCT(ff_fdct)(block); // cannot be anything else ...
104
105 if(s->dct_error_sum)
106 s->denoise_dct(s, block);
107
108 if (s->mb_intra) {
109 int dummy;
110 if (n < 4){
111 q = s->y_dc_scale;
112 bias = s->q_intra_matrix16[qscale][1];
113 qmat = s->q_intra_matrix16[qscale][0];
114 }else{
115 q = s->c_dc_scale;
116 bias = s->q_chroma_intra_matrix16[qscale][1];
117 qmat = s->q_chroma_intra_matrix16[qscale][0];
118 }
119 /* note: block[0] is assumed to be positive */
120 if (!s->h263_aic) {
121 __asm__ volatile (
122 "mul %%ecx \n\t"
123 : "=d" (level), "=a"(dummy)
124 : "a" ((block[0]>>2) + q), "c" (ff_inverse[q<<1])
125 );
126 } else
127 /* For AIC we skip quant/dequant of INTRADC */
128 level = (block[0] + 4)>>3;
129
130 block[0]=0; //avoid fake overflow
131 // temp_block[0] = (block[0] + (q >> 1)) / q;
132 last_non_zero_p1 = 1;
133 } else {
134 last_non_zero_p1 = 0;
135 bias = s->q_inter_matrix16[qscale][1];
136 qmat = s->q_inter_matrix16[qscale][0];
137 }
138
139 if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
140
141 __asm__ volatile(
142 "movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
143 SPREADW(MM"3")
144 "pxor "MM"7, "MM"7 \n\t" // 0
145 "pxor "MM"4, "MM"4 \n\t" // 0
146 MOVQ" (%2), "MM"5 \n\t" // qmat[0]
147 "pxor "MM"6, "MM"6 \n\t"
148 "psubw (%3), "MM"6 \n\t" // -bias[0]
149 "mov $-128, %%"FF_REG_a" \n\t"
150 ".p2align 4 \n\t"
151 "1: \n\t"
152 MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
153 SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
154 "psubusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
155 "pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
156 "por "MM"0, "MM"4 \n\t"
157 RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
158 MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
159 "pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
160 MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
161 MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
162 "pandn "MM"1, "MM"0 \n\t"
163 PMAXW(MM"0", MM"3")
164 "add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
165 " js 1b \n\t"
166 PMAX(MM"3", MM"0")
167 "movd "MM"3, %%"FF_REG_a" \n\t"
168 "movzbl %%al, %%eax \n\t" // last_non_zero_p1
169 : "+a" (last_non_zero_p1)
170 : "r" (block+64), "r" (qmat), "r" (bias),
171 "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
172 XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
173 "%xmm4", "%xmm5", "%xmm6", "%xmm7")
174 );
175 }else{ // FMT_H263
176 __asm__ volatile(
177 "movd %%"FF_REG_a", "MM"3 \n\t" // last_non_zero_p1
178 SPREADW(MM"3")
179 "pxor "MM"7, "MM"7 \n\t" // 0
180 "pxor "MM"4, "MM"4 \n\t" // 0
181 "mov $-128, %%"FF_REG_a" \n\t"
182 ".p2align 4 \n\t"
183 "1: \n\t"
184 MOVQ" (%1, %%"FF_REG_a"), "MM"0 \n\t" // block[i]
185 SAVE_SIGN(MM"1", MM"0") // ABS(block[i])
186 MOVQ" (%3, %%"FF_REG_a"), "MM"6 \n\t" // bias[0]
187 "paddusw "MM"6, "MM"0 \n\t" // ABS(block[i]) + bias[0]
188 MOVQ" (%2, %%"FF_REG_a"), "MM"5 \n\t" // qmat[i]
189 "pmulhw "MM"5, "MM"0 \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
190 "por "MM"0, "MM"4 \n\t"
191 RESTORE_SIGN(MM"1", MM"0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
192 MOVQ" "MM"0, (%5, %%"FF_REG_a") \n\t"
193 "pcmpeqw "MM"7, "MM"0 \n\t" // out==0 ? 0xFF : 0x00
194 MOVQ" (%4, %%"FF_REG_a"), "MM"1 \n\t"
195 MOVQ" "MM"7, (%1, %%"FF_REG_a") \n\t" // 0
196 "pandn "MM"1, "MM"0 \n\t"
197 PMAXW(MM"0", MM"3")
198 "add $"MMREG_WIDTH", %%"FF_REG_a" \n\t"
199 " js 1b \n\t"
200 PMAX(MM"3", MM"0")
201 "movd "MM"3, %%"FF_REG_a" \n\t"
202 "movzbl %%al, %%eax \n\t" // last_non_zero_p1
203 : "+a" (last_non_zero_p1)
204 : "r" (block+64), "r" (qmat+64), "r" (bias+64),
205 "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
206 XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
207 "%xmm4", "%xmm5", "%xmm6", "%xmm7")
208 );
209 }
210 __asm__ volatile(
211 "movd %1, "MM"1 \n\t" // max_qcoeff
212 SPREADW(MM"1")
213 "psubusw "MM"1, "MM"4 \n\t"
214 "packuswb "MM"4, "MM"4 \n\t"
215 #if COMPILE_TEMPLATE_SSE2
216 "packsswb "MM"4, "MM"4 \n\t"
217 #endif
218 "movd "MM"4, %0 \n\t" // *overflow
219 : "=g" (*overflow)
220 : "g" (s->max_qcoeff)
221 );
222
223 if(s->mb_intra) block[0]= level;
224 else block[0]= temp_block[0];
225
226 av_assert2(ARCH_X86_32 || s->idsp.perm_type != FF_IDCT_PERM_SIMPLE);
227 if (ARCH_X86_32 && s->idsp.perm_type == FF_IDCT_PERM_SIMPLE) {
228 if(last_non_zero_p1 <= 1) goto end;
229 block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
230 block[0x20] = temp_block[0x10];
231 if(last_non_zero_p1 <= 4) goto end;
232 block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
233 block[0x09] = temp_block[0x03];
234 if(last_non_zero_p1 <= 7) goto end;
235 block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
236 block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
237 if(last_non_zero_p1 <= 11) goto end;
238 block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
239 block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
240 block[0x0C] = temp_block[0x05];
241 if(last_non_zero_p1 <= 16) goto end;
242 block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
243 block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
244 block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
245 block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
246 if(last_non_zero_p1 <= 24) goto end;
247 block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
248 block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
249 block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
250 block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
251 if(last_non_zero_p1 <= 32) goto end;
252 block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
253 block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
254 block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
255 block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
256 if(last_non_zero_p1 <= 40) goto end;
257 block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
258 block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
259 block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
260 block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
261 if(last_non_zero_p1 <= 48) goto end;
262 block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
263 block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
264 block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
265 block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
266 if(last_non_zero_p1 <= 56) goto end;
267 block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
268 block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
269 block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
270 block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
271 }else if(s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2){
272 if(last_non_zero_p1 <= 1) goto end;
273 block[0x04] = temp_block[0x01];
274 block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
275 if(last_non_zero_p1 <= 4) goto end;
276 block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
277 block[0x05] = temp_block[0x03];
278 if(last_non_zero_p1 <= 7) goto end;
279 block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
280 block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
281 if(last_non_zero_p1 <= 11) goto end;
282 block[0x1C] = temp_block[0x19];
283 block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
284 block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
285 if(last_non_zero_p1 <= 16) goto end;
286 block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
287 block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
288 block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
289 block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
290 if(last_non_zero_p1 <= 24) goto end;
291 block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
292 block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
293 block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
294 block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
295 if(last_non_zero_p1 <= 32) goto end;
296 block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
297 block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
298 block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
299 block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
300 if(last_non_zero_p1 <= 40) goto end;
301 block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
302 block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
303 block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
304 block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
305 if(last_non_zero_p1 <= 48) goto end;
306 block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
307 block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
308 block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
309 block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
310 if(last_non_zero_p1 <= 56) goto end;
311 block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
312 block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
313 block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
314 block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
315 } else if (s->idsp.perm_type == FF_IDCT_PERM_NONE) {
316 if(last_non_zero_p1 <= 1) goto end;
317 block[0x01] = temp_block[0x01];
318 block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
319 if(last_non_zero_p1 <= 4) goto end;
320 block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
321 block[0x03] = temp_block[0x03];
322 if(last_non_zero_p1 <= 7) goto end;
323 block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
324 block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
325 if(last_non_zero_p1 <= 11) goto end;
326 block[0x19] = temp_block[0x19];
327 block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
328 block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
329 if(last_non_zero_p1 <= 16) goto end;
330 block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
331 block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
332 block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
333 block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
334 if(last_non_zero_p1 <= 24) goto end;
335 block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
336 block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
337 block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
338 block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
339 if(last_non_zero_p1 <= 32) goto end;
340 block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
341 block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
342 block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
343 block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
344 if(last_non_zero_p1 <= 40) goto end;
345 block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
346 block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
347 block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
348 block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
349 if(last_non_zero_p1 <= 48) goto end;
350 block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
351 block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
352 block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
353 block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
354 if(last_non_zero_p1 <= 56) goto end;
355 block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
356 block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
357 block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
358 block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
359 } else if (s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE) {
360 if(last_non_zero_p1 <= 1) goto end;
361 block[0x08] = temp_block[0x01];
362 block[0x01] = temp_block[0x08]; block[0x02] = temp_block[0x10];
363 if(last_non_zero_p1 <= 4) goto end;
364 block[0x09] = temp_block[0x09]; block[0x10] = temp_block[0x02];
365 block[0x18] = temp_block[0x03];
366 if(last_non_zero_p1 <= 7) goto end;
367 block[0x11] = temp_block[0x0A]; block[0x0A] = temp_block[0x11];
368 block[0x03] = temp_block[0x18]; block[0x04] = temp_block[0x20];
369 if(last_non_zero_p1 <= 11) goto end;
370 block[0x0B] = temp_block[0x19];
371 block[0x12] = temp_block[0x12]; block[0x19] = temp_block[0x0B];
372 block[0x20] = temp_block[0x04]; block[0x28] = temp_block[0x05];
373 if(last_non_zero_p1 <= 16) goto end;
374 block[0x21] = temp_block[0x0C]; block[0x1A] = temp_block[0x13];
375 block[0x13] = temp_block[0x1A]; block[0x0C] = temp_block[0x21];
376 block[0x05] = temp_block[0x28]; block[0x06] = temp_block[0x30];
377 block[0x0D] = temp_block[0x29]; block[0x14] = temp_block[0x22];
378 if(last_non_zero_p1 <= 24) goto end;
379 block[0x1B] = temp_block[0x1B]; block[0x22] = temp_block[0x14];
380 block[0x29] = temp_block[0x0D]; block[0x30] = temp_block[0x06];
381 block[0x38] = temp_block[0x07]; block[0x31] = temp_block[0x0E];
382 block[0x2A] = temp_block[0x15]; block[0x23] = temp_block[0x1C];
383 if(last_non_zero_p1 <= 32) goto end;
384 block[0x1C] = temp_block[0x23]; block[0x15] = temp_block[0x2A];
385 block[0x0E] = temp_block[0x31]; block[0x07] = temp_block[0x38];
386 block[0x0F] = temp_block[0x39]; block[0x16] = temp_block[0x32];
387 block[0x1D] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
388 if(last_non_zero_p1 <= 40) goto end;
389 block[0x2B] = temp_block[0x1D]; block[0x32] = temp_block[0x16];
390 block[0x39] = temp_block[0x0F]; block[0x3A] = temp_block[0x17];
391 block[0x33] = temp_block[0x1E]; block[0x2C] = temp_block[0x25];
392 block[0x25] = temp_block[0x2C]; block[0x1E] = temp_block[0x33];
393 if(last_non_zero_p1 <= 48) goto end;
394 block[0x17] = temp_block[0x3A]; block[0x1F] = temp_block[0x3B];
395 block[0x26] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
396 block[0x34] = temp_block[0x26]; block[0x3B] = temp_block[0x1F];
397 block[0x3C] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
398 if(last_non_zero_p1 <= 56) goto end;
399 block[0x2E] = temp_block[0x35]; block[0x27] = temp_block[0x3C];
400 block[0x2F] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
401 block[0x3D] = temp_block[0x2F]; block[0x3E] = temp_block[0x37];
402 block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
403 } else {
404 av_log(s, AV_LOG_DEBUG, "s->idsp.perm_type: %d\n",
405 (int)s->idsp.perm_type);
406 av_assert0(s->idsp.perm_type == FF_IDCT_PERM_NONE ||
407 s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2 ||
408 s->idsp.perm_type == FF_IDCT_PERM_SIMPLE ||
409 s->idsp.perm_type == FF_IDCT_PERM_TRANSPOSE);
410 }
411 end:
412 return last_non_zero_p1 - 1;
413 }
414