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ffmpeg / libavfilter / libmpcodecs / vf_ivtc.c @ e4852fb3

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/*
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 * This file is part of MPlayer.
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 *
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 * MPlayer is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * MPlayer is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
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 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "cpudetect.h"
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#include "img_format.h"
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#include "mp_image.h"
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#include "vf.h"
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#include "libvo/fastmemcpy.h"
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struct metrics {
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    /* difference: total, even lines, odd lines */
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    int d, e, o;
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    /* noise: temporal, spacial (current), spacial (past) */
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    int t, s, p;
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};
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struct frameinfo {
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    /* peak, relative, mean */
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    struct metrics p, r, m;
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};
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struct vf_priv_s {
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    struct frameinfo fi[2];
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    mp_image_t *dmpi;
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    int first;
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    int drop, lastdrop, dropnext;
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    int inframes, outframes;
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};
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enum {
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    F_DROP,
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    F_MERGE,
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    F_NEXT,
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    F_SHOW
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};
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#if HAVE_MMX && HAVE_EBX_AVAILABLE
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static void block_diffs_MMX(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
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{
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    int i;
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    short out[24]; // output buffer for the partial metrics from the mmx code
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    __asm__ (
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        "movl $4, %%ecx \n\t"
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        "pxor %%mm4, %%mm4 \n\t" // 4 even difference sums
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        "pxor %%mm5, %%mm5 \n\t" // 4 odd difference sums
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        "pxor %%mm7, %%mm7 \n\t" // all zeros
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        ASMALIGN(4)
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        "1: \n\t"
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        // Even difference
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        "movq (%%"REG_S"), %%mm0 \n\t"
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        "movq (%%"REG_S"), %%mm2 \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
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        "movq (%%"REG_D"), %%mm1 \n\t"
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        "add %%"REG_b", %%"REG_D" \n\t"
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        "psubusb %%mm1, %%mm2 \n\t"
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        "psubusb %%mm0, %%mm1 \n\t"
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        "movq %%mm2, %%mm0 \n\t"
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        "movq %%mm1, %%mm3 \n\t"
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        "punpcklbw %%mm7, %%mm0 \n\t"
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        "punpcklbw %%mm7, %%mm1 \n\t"
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        "punpckhbw %%mm7, %%mm2 \n\t"
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        "punpckhbw %%mm7, %%mm3 \n\t"
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        "paddw %%mm0, %%mm4 \n\t"
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        "paddw %%mm1, %%mm4 \n\t"
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        "paddw %%mm2, %%mm4 \n\t"
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        "paddw %%mm3, %%mm4 \n\t"
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        // Odd difference
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        "movq (%%"REG_S"), %%mm0 \n\t"
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        "movq (%%"REG_S"), %%mm2 \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
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        "movq (%%"REG_D"), %%mm1 \n\t"
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        "add %%"REG_b", %%"REG_D" \n\t"
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        "psubusb %%mm1, %%mm2 \n\t"
102
        "psubusb %%mm0, %%mm1 \n\t"
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        "movq %%mm2, %%mm0 \n\t"
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        "movq %%mm1, %%mm3 \n\t"
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        "punpcklbw %%mm7, %%mm0 \n\t"
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        "punpcklbw %%mm7, %%mm1 \n\t"
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        "punpckhbw %%mm7, %%mm2 \n\t"
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        "punpckhbw %%mm7, %%mm3 \n\t"
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        "paddw %%mm0, %%mm5 \n\t"
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        "paddw %%mm1, %%mm5 \n\t"
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        "paddw %%mm2, %%mm5 \n\t"
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        "paddw %%mm3, %%mm5 \n\t"
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        "decl %%ecx \n\t"
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        "jnz 1b \n\t"
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        "movq %%mm4, (%%"REG_d") \n\t"
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        "movq %%mm5, 8(%%"REG_d") \n\t"
118
        :
119
        : "S" (old), "D" (new), "a" (os), "b" (ns), "d" (out)
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        : "memory"
121
        );
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    m->e = out[0]+out[1]+out[2]+out[3];
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    m->o = out[4]+out[5]+out[6]+out[7];
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    m->d = m->e + m->o;
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126
    __asm__ (
127
        // First loop to measure first four columns
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        "movl $4, %%ecx \n\t"
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        "pxor %%mm4, %%mm4 \n\t" // Past spacial noise
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        "pxor %%mm5, %%mm5 \n\t" // Temporal noise
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        "pxor %%mm6, %%mm6 \n\t" // Current spacial noise
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133
        ASMALIGN(4)
134
        "2: \n\t"
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136
        "movq (%%"REG_S"), %%mm0 \n\t"
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        "movq (%%"REG_S",%%"REG_a"), %%mm1 \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
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        "movq (%%"REG_D"), %%mm2 \n\t"
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        "movq (%%"REG_D",%%"REG_b"), %%mm3 \n\t"
142
        "add %%"REG_b", %%"REG_D" \n\t"
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        "add %%"REG_b", %%"REG_D" \n\t"
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        "punpcklbw %%mm7, %%mm0 \n\t"
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        "punpcklbw %%mm7, %%mm1 \n\t"
146
        "punpcklbw %%mm7, %%mm2 \n\t"
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        "punpcklbw %%mm7, %%mm3 \n\t"
148
        "paddw %%mm1, %%mm4 \n\t"
149
        "paddw %%mm1, %%mm5 \n\t"
150
        "paddw %%mm3, %%mm6 \n\t"
151
        "psubw %%mm0, %%mm4 \n\t"
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        "psubw %%mm2, %%mm5 \n\t"
153
        "psubw %%mm2, %%mm6 \n\t"
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155
        "decl %%ecx \n\t"
156
        "jnz 2b \n\t"
157

    
158
        "movq %%mm0, %%mm1 \n\t"
159
        "movq %%mm0, %%mm2 \n\t"
160
        "movq %%mm0, %%mm3 \n\t"
161
        "pcmpgtw %%mm4, %%mm1 \n\t"
162
        "pcmpgtw %%mm5, %%mm2 \n\t"
163
        "pcmpgtw %%mm6, %%mm3 \n\t"
164
        "pxor %%mm1, %%mm4 \n\t"
165
        "pxor %%mm2, %%mm5 \n\t"
166
        "pxor %%mm3, %%mm6 \n\t"
167
        "psubw %%mm1, %%mm4 \n\t"
168
        "psubw %%mm2, %%mm5 \n\t"
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        "psubw %%mm3, %%mm6 \n\t"
170
        "movq %%mm4, (%%"REG_d") \n\t"
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        "movq %%mm5, 16(%%"REG_d") \n\t"
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        "movq %%mm6, 32(%%"REG_d") \n\t"
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174
        "mov %%"REG_a", %%"REG_c" \n\t"
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        "shl $3, %%"REG_c" \n\t"
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        "sub %%"REG_c", %%"REG_S" \n\t"
177
        "mov %%"REG_b", %%"REG_c" \n\t"
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        "shl $3, %%"REG_c" \n\t"
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        "sub %%"REG_c", %%"REG_D" \n\t"
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181
        // Second loop for the last four columns
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        "movl $4, %%ecx \n\t"
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        "pxor %%mm4, %%mm4 \n\t"
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        "pxor %%mm5, %%mm5 \n\t"
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        "pxor %%mm6, %%mm6 \n\t"
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187
        ASMALIGN(4)
188
        "3: \n\t"
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190
        "movq (%%"REG_S"), %%mm0 \n\t"
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        "movq (%%"REG_S",%%"REG_a"), %%mm1 \n\t"
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        "add %%"REG_a", %%"REG_S" \n\t"
193
        "add %%"REG_a", %%"REG_S" \n\t"
194
        "movq (%%"REG_D"), %%mm2 \n\t"
195
        "movq (%%"REG_D",%%"REG_b"), %%mm3 \n\t"
196
        "add %%"REG_b", %%"REG_D" \n\t"
197
        "add %%"REG_b", %%"REG_D" \n\t"
198
        "punpckhbw %%mm7, %%mm0 \n\t"
199
        "punpckhbw %%mm7, %%mm1 \n\t"
200
        "punpckhbw %%mm7, %%mm2 \n\t"
201
        "punpckhbw %%mm7, %%mm3 \n\t"
202
        "paddw %%mm1, %%mm4 \n\t"
203
        "paddw %%mm1, %%mm5 \n\t"
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        "paddw %%mm3, %%mm6 \n\t"
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        "psubw %%mm0, %%mm4 \n\t"
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        "psubw %%mm2, %%mm5 \n\t"
207
        "psubw %%mm2, %%mm6 \n\t"
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209
        "decl %%ecx \n\t"
210
        "jnz 3b \n\t"
211

    
212
        "movq %%mm0, %%mm1 \n\t"
213
        "movq %%mm0, %%mm2 \n\t"
214
        "movq %%mm0, %%mm3 \n\t"
215
        "pcmpgtw %%mm4, %%mm1 \n\t"
216
        "pcmpgtw %%mm5, %%mm2 \n\t"
217
        "pcmpgtw %%mm6, %%mm3 \n\t"
218
        "pxor %%mm1, %%mm4 \n\t"
219
        "pxor %%mm2, %%mm5 \n\t"
220
        "pxor %%mm3, %%mm6 \n\t"
221
        "psubw %%mm1, %%mm4 \n\t"
222
        "psubw %%mm2, %%mm5 \n\t"
223
        "psubw %%mm3, %%mm6 \n\t"
224
        "movq %%mm4, 8(%%"REG_d") \n\t"
225
        "movq %%mm5, 24(%%"REG_d") \n\t"
226
        "movq %%mm6, 40(%%"REG_d") \n\t"
227

    
228
        "emms \n\t"
229
        :
230
        : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
231
        : "memory"
232
        );
233
    m->p = m->t = m->s = 0;
234
    for (i=0; i<8; i++) {
235
        m->p += out[i];
236
        m->t += out[8+i];
237
        m->s += out[16+i];
238
    }
239
    //printf("e=%d o=%d d=%d p=%d t=%d s=%d\n", m->e, m->o, m->d, m->p, m->t, m->s);
240
}
241
#endif
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243
//#define MAG(a) ((a)*(a))
244
//#define MAG(a) (abs(a))
245
#define MAG(a) (((a)^((a)>>31))-((a)>>31))
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247
//#define LOWPASS(s) (((s)[-2] + 4*(s)[-1] + 6*(s)[0] + 4*(s)[1] + (s)[2])>>4)
248
//#define LOWPASS(s) (((s)[-1] + 2*(s)[0] + (s)[1])>>2)
249
#define LOWPASS(s) ((s)[0])
250

    
251

    
252
static void block_diffs_C(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
253
{
254
    int x, y, e=0, o=0, s=0, p=0, t=0;
255
    unsigned char *oldp, *newp;
256
    m->s = m->p = m->t = 0;
257
    for (x = 8; x; x--) {
258
        oldp = old++;
259
        newp = new++;
260
        s = p = t = 0;
261
        for (y = 4; y; y--) {
262
            e += MAG(newp[0]-oldp[0]);
263
            o += MAG(newp[ns]-oldp[os]);
264
            s += newp[ns]-newp[0];
265
            p += oldp[os]-oldp[0];
266
            t += oldp[os]-newp[0];
267
            oldp += os<<1;
268
            newp += ns<<1;
269
        }
270
        m->s += MAG(s);
271
        m->p += MAG(p);
272
        m->t += MAG(t);
273
    }
274
    m->e = e;
275
    m->o = o;
276
    m->d = e+o;
277
}
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279
static void (*block_diffs)(struct metrics *, unsigned char *, unsigned char *, int, int);
280

    
281
#define MAXUP(a,b) ((a) = ((a)>(b)) ? (a) : (b))
282

    
283
static void diff_planes(struct frameinfo *fi,
284
    unsigned char *old, unsigned char *new, int w, int h, int os, int ns)
285
{
286
    int x, y;
287
    struct metrics l;
288
    struct metrics *peak=&fi->p, *rel=&fi->r, *mean=&fi->m;
289
    memset(peak, 0, sizeof(struct metrics));
290
    memset(rel, 0, sizeof(struct metrics));
291
    memset(mean, 0, sizeof(struct metrics));
292
    for (y = 0; y < h-7; y += 8) {
293
        for (x = 8; x < w-8-7; x += 8) {
294
            block_diffs(&l, old+x+y*os, new+x+y*ns, os, ns);
295
            mean->d += l.d;
296
            mean->e += l.e;
297
            mean->o += l.o;
298
            mean->s += l.s;
299
            mean->p += l.p;
300
            mean->t += l.t;
301
            MAXUP(peak->d, l.d);
302
            MAXUP(peak->e, l.e);
303
            MAXUP(peak->o, l.o);
304
            MAXUP(peak->s, l.s);
305
            MAXUP(peak->p, l.p);
306
            MAXUP(peak->t, l.t);
307
            MAXUP(rel->e, l.e-l.o);
308
            MAXUP(rel->o, l.o-l.e);
309
            MAXUP(rel->s, l.s-l.t);
310
            MAXUP(rel->p, l.p-l.t);
311
            MAXUP(rel->t, l.t-l.p);
312
            MAXUP(rel->d, l.t-l.s); /* hack */
313
        }
314
    }
315
    x = (w/8-2)*(h/8);
316
    mean->d /= x;
317
    mean->e /= x;
318
    mean->o /= x;
319
    mean->s /= x;
320
    mean->p /= x;
321
    mean->t /= x;
322
}
323

    
324
static void diff_fields(struct frameinfo *fi, mp_image_t *old, mp_image_t *new)
325
{
326
    diff_planes(fi, old->planes[0], new->planes[0],
327
        new->w, new->h, old->stride[0], new->stride[0]);
328
}
329

    
330
static void stats(struct frameinfo *f)
331
{
332
    mp_msg(MSGT_VFILTER, MSGL_V, "       pd=%d re=%d ro=%d rp=%d rt=%d rs=%d rd=%d pp=%d pt=%d ps=%d\r",
333
        f->p.d, f->r.e, f->r.o, f->r.p, f->r.t, f->r.s, f->r.d, f->p.p, f->p.t, f->p.s);
334
}
335

    
336
static int foo(struct vf_priv_s *p, mp_image_t *new, mp_image_t *cur)
337
{
338
    struct frameinfo *f = p->fi;
339

    
340
    f[0] = f[1];
341
    diff_fields(&f[1], cur, new);
342
    stats(&f[1]);
343

    
344
    // Immediately drop this frame if it's already been used.
345
    if (p->dropnext) {
346
        p->dropnext = 0;
347
        return F_DROP;
348
    }
349

    
350
    // Sometimes a pulldown frame comes all by itself, so both
351
    // its top and bottom field are duplicates from the adjacent
352
    // two frames. We can just drop such a frame, but we
353
    // immediately show the next frame instead to keep the frame
354
    // drops evenly spaced during normal 3:2 pulldown sequences.
355
    if ((3*f[1].r.o < f[1].r.e) && (f[1].r.s < f[1].r.d)) {
356
        p->dropnext = 1;
357
        return F_NEXT;
358
    }
359

    
360
    // If none of these conditions hold, we will consider the frame
361
    // progressive and just show it as-is.
362
    if (!(  (3*f[0].r.e < f[0].r.o) ||
363
        ((2*f[0].r.d < f[0].r.s) && (f[0].r.s > 1200)) ||
364
        ((2*f[1].r.t < f[1].r.p) && (f[1].r.p > 1200))  ))
365
        return F_SHOW;
366

    
367
    // Otherwise, we have to decide whether to merge or drop.
368
    // If the noise metric only increases minimally, we're off
369
    // to a good start...
370
    if (((2*f[1].r.t < 3*f[1].r.p) && (f[1].r.t < 3600)) ||
371
        (f[1].r.t < 900) || (f[1].r.d < 900)) {
372
        // ...and if noise decreases or the duplicate even field
373
        // is detected, we go ahead with the merge.
374
        if ((3*f[0].r.e < f[0].r.o) || (2*f[1].r.t < f[1].r.p)) {
375
            p->dropnext = 1;
376
            return F_MERGE;
377
        }
378
    }
379
    return F_DROP;
380
}
381

    
382

    
383

    
384
static void copy_image(mp_image_t *dmpi, mp_image_t *mpi, int field)
385
{
386
    switch (field) {
387
    case 0:
388
        my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
389
            dmpi->stride[0]*2, mpi->stride[0]*2);
390
        if (mpi->flags & MP_IMGFLAG_PLANAR) {
391
            my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
392
                mpi->chroma_width, mpi->chroma_height/2,
393
                dmpi->stride[1]*2, mpi->stride[1]*2);
394
            my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
395
                mpi->chroma_width, mpi->chroma_height/2,
396
                dmpi->stride[2]*2, mpi->stride[2]*2);
397
        }
398
        break;
399
    case 1:
400
        my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
401
            mpi->planes[0]+mpi->stride[0], mpi->w, mpi->h/2,
402
            dmpi->stride[0]*2, mpi->stride[0]*2);
403
        if (mpi->flags & MP_IMGFLAG_PLANAR) {
404
            my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
405
                mpi->planes[1]+mpi->stride[1],
406
                mpi->chroma_width, mpi->chroma_height/2,
407
                dmpi->stride[1]*2, mpi->stride[1]*2);
408
            my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
409
                mpi->planes[2]+mpi->stride[2],
410
                mpi->chroma_width, mpi->chroma_height/2,
411
                dmpi->stride[2]*2, mpi->stride[2]*2);
412
        }
413
        break;
414
    case 2:
415
        memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
416
            dmpi->stride[0], mpi->stride[0]);
417
        if (mpi->flags & MP_IMGFLAG_PLANAR) {
418
            memcpy_pic(dmpi->planes[1], mpi->planes[1],
419
                mpi->chroma_width, mpi->chroma_height,
420
                dmpi->stride[1], mpi->stride[1]);
421
            memcpy_pic(dmpi->planes[2], mpi->planes[2],
422
                mpi->chroma_width, mpi->chroma_height,
423
                dmpi->stride[2], mpi->stride[2]);
424
        }
425
        break;
426
    }
427
}
428

    
429
static int do_put_image(struct vf_instance *vf, mp_image_t *dmpi)
430
{
431
    struct vf_priv_s *p = vf->priv;
432
    int dropflag=0;
433

    
434
    if (!p->dropnext) switch (p->drop) {
435
    case 0:
436
        dropflag = 0;
437
        break;
438
    case 1:
439
        dropflag = (++p->lastdrop >= 5);
440
        break;
441
    case 2:
442
        dropflag = (++p->lastdrop >= 5) && (4*p->inframes <= 5*p->outframes);
443
        break;
444
    }
445

    
446
    if (dropflag) {
447
        //mp_msg(MSGT_VFILTER, MSGL_V, "drop! [%d/%d=%g]\n",
448
        //    p->outframes, p->inframes, (float)p->outframes/p->inframes);
449
        mp_msg(MSGT_VFILTER, MSGL_V, "!");
450
        p->lastdrop = 0;
451
        return 0;
452
    }
453

    
454
    p->outframes++;
455
    return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
456
}
457

    
458
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
459
{
460
    int ret=0;
461
    struct vf_priv_s *p = vf->priv;
462

    
463
    p->inframes++;
464

    
465
    if (p->first) { /* hack */
466
        p->first = 0;
467
        return 1;
468
    }
469

    
470
    if (!p->dmpi) p->dmpi = vf_get_image(vf->next, mpi->imgfmt,
471
        MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
472
        MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
473
        mpi->width, mpi->height);
474
    /* FIXME -- not correct, off by one frame! */
475
    p->dmpi->qscale = mpi->qscale;
476
    p->dmpi->qstride = mpi->qstride;
477
    p->dmpi->qscale_type = mpi->qscale_type;
478

    
479
    switch (foo(p, mpi, p->dmpi)) {
480
    case F_DROP:
481
        copy_image(p->dmpi, mpi, 2);
482
        ret = 0;
483
        p->lastdrop = 0;
484
        mp_msg(MSGT_VFILTER, MSGL_V, "DROP\n");
485
        break;
486
    case F_MERGE:
487
        copy_image(p->dmpi, mpi, 0);
488
        ret = do_put_image(vf, p->dmpi);
489
        copy_image(p->dmpi, mpi, 1);
490
        mp_msg(MSGT_VFILTER, MSGL_V, "MERGE\n");
491
        p->dmpi = NULL;
492
        break;
493
    case F_NEXT:
494
        copy_image(p->dmpi, mpi, 2);
495
        ret = do_put_image(vf, p->dmpi);
496
        mp_msg(MSGT_VFILTER, MSGL_V, "NEXT\n");
497
        p->dmpi = NULL;
498
        break;
499
    case F_SHOW:
500
        ret = do_put_image(vf, p->dmpi);
501
        copy_image(p->dmpi, mpi, 2);
502
        mp_msg(MSGT_VFILTER, MSGL_V, "OK\n");
503
        p->dmpi = NULL;
504
        break;
505
    }
506
    return ret;
507
}
508

    
509
static int query_format(struct vf_instance *vf, unsigned int fmt)
510
{
511
    switch (fmt) {
512
    case IMGFMT_YV12:
513
    case IMGFMT_IYUV:
514
    case IMGFMT_I420:
515
        return vf_next_query_format(vf, fmt);
516
    }
517
    return 0;
518
}
519

    
520
static void uninit(struct vf_instance *vf)
521
{
522
    free(vf->priv);
523
}
524

    
525
static int vf_open(vf_instance_t *vf, char *args)
526
{
527
    struct vf_priv_s *p;
528
    vf->put_image = put_image;
529
    vf->query_format = query_format;
530
    vf->uninit = uninit;
531
    vf->default_reqs = VFCAP_ACCEPT_STRIDE;
532
    vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
533
    p->drop = 0;
534
    p->first = 1;
535
    if (args) sscanf(args, "%d", &p->drop);
536
    block_diffs = block_diffs_C;
537
#if HAVE_MMX && HAVE_EBX_AVAILABLE
538
    if(gCpuCaps.hasMMX) block_diffs = block_diffs_MMX;
539
#endif
540
    return 1;
541
}
542

    
543
const vf_info_t vf_info_ivtc = {
544
    "inverse telecine, take 2",
545
    "ivtc",
546
    "Rich Felker",
547
    "",
548
    vf_open,
549
    NULL
550
};