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FFmpeg/libavfilter/libmpcodecs/pullup.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "pullup.h"
#include "cpudetect.h"
#if ARCH_X86
#if HAVE_MMX
static int diff_y_mmx(unsigned char *a, unsigned char *b, int s)
{
int ret;
__asm__ volatile (
"movl $4, %%ecx \n\t"
"pxor %%mm4, %%mm4 \n\t"
"pxor %%mm7, %%mm7 \n\t"
"1: \n\t"
"movq (%%"REG_S"), %%mm0 \n\t"
"movq (%%"REG_S"), %%mm2 \n\t"
"add %%"REG_a", %%"REG_S" \n\t"
"movq (%%"REG_D"), %%mm1 \n\t"
"add %%"REG_a", %%"REG_D" \n\t"
"psubusb %%mm1, %%mm2 \n\t"
"psubusb %%mm0, %%mm1 \n\t"
"movq %%mm2, %%mm0 \n\t"
"movq %%mm1, %%mm3 \n\t"
"punpcklbw %%mm7, %%mm0 \n\t"
"punpcklbw %%mm7, %%mm1 \n\t"
"punpckhbw %%mm7, %%mm2 \n\t"
"punpckhbw %%mm7, %%mm3 \n\t"
"paddw %%mm0, %%mm4 \n\t"
"paddw %%mm1, %%mm4 \n\t"
"paddw %%mm2, %%mm4 \n\t"
"paddw %%mm3, %%mm4 \n\t"
"decl %%ecx \n\t"
"jnz 1b \n\t"
"movq %%mm4, %%mm3 \n\t"
"punpcklwd %%mm7, %%mm4 \n\t"
"punpckhwd %%mm7, %%mm3 \n\t"
"paddd %%mm4, %%mm3 \n\t"
"movd %%mm3, %%eax \n\t"
"psrlq $32, %%mm3 \n\t"
"movd %%mm3, %%edx \n\t"
"addl %%edx, %%eax \n\t"
"emms \n\t"
: "=a" (ret)
: "S" (a), "D" (b), "a" (s)
: "%ecx", "%edx"
);
return ret;
}
static int licomb_y_mmx(unsigned char *a, unsigned char *b, int s)
{
int ret;
__asm__ volatile (
"movl $4, %%ecx \n\t"
"pxor %%mm6, %%mm6 \n\t"
"pxor %%mm7, %%mm7 \n\t"
"sub %%"REG_a", %%"REG_D" \n\t"
"2: \n\t"
"movq (%%"REG_D"), %%mm0 \n\t"
"movq (%%"REG_D"), %%mm1 \n\t"
"punpcklbw %%mm7, %%mm0 \n\t"
"movq (%%"REG_D",%%"REG_a"), %%mm2 \n\t"
"punpcklbw %%mm7, %%mm1 \n\t"
"punpcklbw %%mm7, %%mm2 \n\t"
"paddw %%mm0, %%mm0 \n\t"
"paddw %%mm2, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"psubusw %%mm1, %%mm0 \n\t"
"psubusw %%mm2, %%mm1 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"paddw %%mm1, %%mm6 \n\t"
"movq (%%"REG_S"), %%mm0 \n\t"
"movq (%%"REG_D"), %%mm1 \n\t"
"punpckhbw %%mm7, %%mm0 \n\t"
"movq (%%"REG_D",%%"REG_a"), %%mm2 \n\t"
"punpckhbw %%mm7, %%mm1 \n\t"
"punpckhbw %%mm7, %%mm2 \n\t"
"paddw %%mm0, %%mm0 \n\t"
"paddw %%mm2, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"psubusw %%mm1, %%mm0 \n\t"
"psubusw %%mm2, %%mm1 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"paddw %%mm1, %%mm6 \n\t"
"movq (%%"REG_D",%%"REG_a"), %%mm0 \n\t"
"movq (%%"REG_S"), %%mm1 \n\t"
"punpcklbw %%mm7, %%mm0 \n\t"
"movq (%%"REG_S",%%"REG_a"), %%mm2 \n\t"
"punpcklbw %%mm7, %%mm1 \n\t"
"punpcklbw %%mm7, %%mm2 \n\t"
"paddw %%mm0, %%mm0 \n\t"
"paddw %%mm2, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"psubusw %%mm1, %%mm0 \n\t"
"psubusw %%mm2, %%mm1 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"paddw %%mm1, %%mm6 \n\t"
"movq (%%"REG_D",%%"REG_a"), %%mm0 \n\t"
"movq (%%"REG_S"), %%mm1 \n\t"
"punpckhbw %%mm7, %%mm0 \n\t"
"movq (%%"REG_S",%%"REG_a"), %%mm2 \n\t"
"punpckhbw %%mm7, %%mm1 \n\t"
"punpckhbw %%mm7, %%mm2 \n\t"
"paddw %%mm0, %%mm0 \n\t"
"paddw %%mm2, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"psubusw %%mm1, %%mm0 \n\t"
"psubusw %%mm2, %%mm1 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"paddw %%mm1, %%mm6 \n\t"
"add %%"REG_a", %%"REG_S" \n\t"
"add %%"REG_a", %%"REG_D" \n\t"
"decl %%ecx \n\t"
"jnz 2b \n\t"
"movq %%mm6, %%mm5 \n\t"
"punpcklwd %%mm7, %%mm6 \n\t"
"punpckhwd %%mm7, %%mm5 \n\t"
"paddd %%mm6, %%mm5 \n\t"
"movd %%mm5, %%eax \n\t"
"psrlq $32, %%mm5 \n\t"
"movd %%mm5, %%edx \n\t"
"addl %%edx, %%eax \n\t"
"emms \n\t"
: "=a" (ret)
: "S" (a), "D" (b), "a" (s)
: "%ecx", "%edx"
);
return ret;
}
static int var_y_mmx(unsigned char *a, unsigned char *b, int s)
{
int ret;
__asm__ volatile (
"movl $3, %%ecx \n\t"
"pxor %%mm4, %%mm4 \n\t"
"pxor %%mm7, %%mm7 \n\t"
"1: \n\t"
"movq (%%"REG_S"), %%mm0 \n\t"
"movq (%%"REG_S"), %%mm2 \n\t"
"movq (%%"REG_S",%%"REG_a"), %%mm1 \n\t"
"add %%"REG_a", %%"REG_S" \n\t"
"psubusb %%mm1, %%mm2 \n\t"
"psubusb %%mm0, %%mm1 \n\t"
"movq %%mm2, %%mm0 \n\t"
"movq %%mm1, %%mm3 \n\t"
"punpcklbw %%mm7, %%mm0 \n\t"
"punpcklbw %%mm7, %%mm1 \n\t"
"punpckhbw %%mm7, %%mm2 \n\t"
"punpckhbw %%mm7, %%mm3 \n\t"
"paddw %%mm0, %%mm4 \n\t"
"paddw %%mm1, %%mm4 \n\t"
"paddw %%mm2, %%mm4 \n\t"
"paddw %%mm3, %%mm4 \n\t"
"decl %%ecx \n\t"
"jnz 1b \n\t"
"movq %%mm4, %%mm3 \n\t"
"punpcklwd %%mm7, %%mm4 \n\t"
"punpckhwd %%mm7, %%mm3 \n\t"
"paddd %%mm4, %%mm3 \n\t"
"movd %%mm3, %%eax \n\t"
"psrlq $32, %%mm3 \n\t"
"movd %%mm3, %%edx \n\t"
"addl %%edx, %%eax \n\t"
"emms \n\t"
: "=a" (ret)
: "S" (a), "a" (s)
: "%ecx", "%edx"
);
return 4*ret;
}
#endif
#endif
#define ABS(a) (((a)^((a)>>31))-((a)>>31))
static int diff_y(unsigned char *a, unsigned char *b, int s)
{
int i, j, diff=0;
for (i=4; i; i--) {
for (j=0; j<8; j++) diff += ABS(a[j]-b[j]);
a+=s; b+=s;
}
return diff;
}
static int licomb_y(unsigned char *a, unsigned char *b, int s)
{
int i, j, diff=0;
for (i=4; i; i--) {
for (j=0; j<8; j++)
diff += ABS((a[j]<<1) - b[j-s] - b[j])
+ ABS((b[j]<<1) - a[j] - a[j+s]);
a+=s; b+=s;
}
return diff;
}
#if 0
static int qpcomb_y(unsigned char *a, unsigned char *b, int s)
{
int i, j, diff=0;
for (i=4; i; i--) {
for (j=0; j<8; j++)
diff += ABS(a[j] - 3*b[j-s] + 3*a[j+s] - b[j]);
a+=s; b+=s;
}
return diff;
}
static int licomb_y_test(unsigned char *a, unsigned char *b, int s)
{
int c = licomb_y(a,b,s);
int m = licomb_y_mmx(a,b,s);
if (c != m) printf("%d != %d\n", c, m);
return m;
}
#endif
static int var_y(unsigned char *a, unsigned char *b, int s)
{
int i, j, var=0;
for (i=3; i; i--) {
for (j=0; j<8; j++) {
var += ABS(a[j]-a[j+s]);
}
a+=s; b+=s;
}
return 4*var; /* match comb scaling */
}
static void alloc_buffer(struct pullup_context *c, struct pullup_buffer *b)
{
int i;
if (b->planes) return;
b->planes = calloc(c->nplanes, sizeof(unsigned char *));
for (i = 0; i < c->nplanes; i++) {
b->planes[i] = malloc(c->h[i]*c->stride[i]);
/* Deal with idiotic 128=0 for chroma: */
memset(b->planes[i], c->background[i], c->h[i]*c->stride[i]);
}
}
struct pullup_buffer *pullup_lock_buffer(struct pullup_buffer *b, int parity)
{
if (!b) return 0;
if ((parity+1) & 1) b->lock[0]++;
if ((parity+1) & 2) b->lock[1]++;
return b;
}
void pullup_release_buffer(struct pullup_buffer *b, int parity)
{
if (!b) return;
if ((parity+1) & 1) b->lock[0]--;
if ((parity+1) & 2) b->lock[1]--;
}
struct pullup_buffer *pullup_get_buffer(struct pullup_context *c, int parity)
{
int i;
/* Try first to get the sister buffer for the previous field */
if (parity < 2 && c->last && parity != c->last->parity
&& !c->last->buffer->lock[parity]) {
alloc_buffer(c, c->last->buffer);
return pullup_lock_buffer(c->last->buffer, parity);
}
/* Prefer a buffer with both fields open */
for (i = 0; i < c->nbuffers; i++) {
if (c->buffers[i].lock[0]) continue;
if (c->buffers[i].lock[1]) continue;
alloc_buffer(c, &c->buffers[i]);
return pullup_lock_buffer(&c->buffers[i], parity);
}
if (parity == 2) return 0;
/* Search for any half-free buffer */
for (i = 0; i < c->nbuffers; i++) {
if (((parity+1) & 1) && c->buffers[i].lock[0]) continue;
if (((parity+1) & 2) && c->buffers[i].lock[1]) continue;
alloc_buffer(c, &c->buffers[i]);
return pullup_lock_buffer(&c->buffers[i], parity);
}
return 0;
}
static void compute_metric(struct pullup_context *c,
struct pullup_field *fa, int pa,
struct pullup_field *fb, int pb,
int (*func)(unsigned char *, unsigned char *, int), int *dest)
{
unsigned char *a, *b;
int x, y;
int mp = c->metric_plane;
int xstep = c->bpp[mp];
int ystep = c->stride[mp]<<3;
int s = c->stride[mp]<<1; /* field stride */
int w = c->metric_w*xstep;
if (!fa->buffer || !fb->buffer) return;
/* Shortcut for duplicate fields (e.g. from RFF flag) */
if (fa->buffer == fb->buffer && pa == pb) {
memset(dest, 0, c->metric_len * sizeof(int));
return;
}
a = fa->buffer->planes[mp] + pa * c->stride[mp] + c->metric_offset;
b = fb->buffer->planes[mp] + pb * c->stride[mp] + c->metric_offset;
for (y = c->metric_h; y; y--) {
for (x = 0; x < w; x += xstep) {
*dest++ = func(a + x, b + x, s);
}
a += ystep; b += ystep;
}
}
static void alloc_metrics(struct pullup_context *c, struct pullup_field *f)
{
f->diffs = calloc(c->metric_len, sizeof(int));
f->comb = calloc(c->metric_len, sizeof(int));
f->var = calloc(c->metric_len, sizeof(int));
/* add more metrics here as needed */
}
static struct pullup_field *make_field_queue(struct pullup_context *c, int len)
{
struct pullup_field *head, *f;
f = head = calloc(1, sizeof(struct pullup_field));
alloc_metrics(c, f);
for (; len > 0; len--) {
f->next = calloc(1, sizeof(struct pullup_field));
f->next->prev = f;
f = f->next;
alloc_metrics(c, f);
}
f->next = head;
head->prev = f;
return head;
}
static void check_field_queue(struct pullup_context *c)
{
if (c->head->next == c->first) {
struct pullup_field *f = calloc(1, sizeof(struct pullup_field));
alloc_metrics(c, f);
f->prev = c->head;
f->next = c->first;
c->head->next = f;
c->first->prev = f;
}
}
void pullup_submit_field(struct pullup_context *c, struct pullup_buffer *b, int parity)
{
struct pullup_field *f;
/* Grow the circular list if needed */
check_field_queue(c);
/* Cannot have two fields of same parity in a row; drop the new one */
if (c->last && c->last->parity == parity) return;
f = c->head;
f->parity = parity;
f->buffer = pullup_lock_buffer(b, parity);
f->flags = 0;
f->breaks = 0;
f->affinity = 0;
compute_metric(c, f, parity, f->prev->prev, parity, c->diff, f->diffs);
compute_metric(c, parity?f->prev:f, 0, parity?f:f->prev, 1, c->comb, f->comb);
compute_metric(c, f, parity, f, -1, c->var, f->var);
/* Advance the circular list */
if (!c->first) c->first = c->head;
c->last = c->head;
c->head = c->head->next;
}
void pullup_flush_fields(struct pullup_context *c)
{
struct pullup_field *f;
for (f = c->first; f && f != c->head; f = f->next) {
pullup_release_buffer(f->buffer, f->parity);
f->buffer = 0;
}
c->first = c->last = 0;
}
#define F_HAVE_BREAKS 1
#define F_HAVE_AFFINITY 2
#define BREAK_LEFT 1
#define BREAK_RIGHT 2
static int queue_length(struct pullup_field *begin, struct pullup_field *end)
{
int count = 1;
struct pullup_field *f;
if (!begin || !end) return 0;
for (f = begin; f != end; f = f->next) count++;
return count;
}
static int find_first_break(struct pullup_field *f, int max)
{
int i;
for (i = 0; i < max; i++) {
if (f->breaks & BREAK_RIGHT || f->next->breaks & BREAK_LEFT)
return i+1;
f = f->next;
}
return 0;
}
static void compute_breaks(struct pullup_context *c, struct pullup_field *f0)
{
int i;
struct pullup_field *f1 = f0->next;
struct pullup_field *f2 = f1->next;
struct pullup_field *f3 = f2->next;
int l, max_l=0, max_r=0;
//struct pullup_field *ff;
//for (i=0, ff=c->first; ff != f0; i++, ff=ff->next);
if (f0->flags & F_HAVE_BREAKS) return;
//printf("\n%d: ", i);
f0->flags |= F_HAVE_BREAKS;
/* Special case when fields are 100% identical */
if (f0->buffer == f2->buffer && f1->buffer != f3->buffer) {
f2->breaks |= BREAK_RIGHT;
return;
}
if (f0->buffer != f2->buffer && f1->buffer == f3->buffer) {
f1->breaks |= BREAK_LEFT;
return;
}
for (i = 0; i < c->metric_len; i++) {
l = f2->diffs[i] - f3->diffs[i];
if (l > max_l) max_l = l;
if (-l > max_r) max_r = -l;
}
/* Don't get tripped up when differences are mostly quant error */
//printf("%d %d\n", max_l, max_r);
if (max_l + max_r < 128) return;
if (max_l > 4*max_r) f1->breaks |= BREAK_LEFT;
if (max_r > 4*max_l) f2->breaks |= BREAK_RIGHT;
}
static void compute_affinity(struct pullup_context *c, struct pullup_field *f)
{
int i;
int max_l=0, max_r=0, l;
if (f->flags & F_HAVE_AFFINITY) return;
f->flags |= F_HAVE_AFFINITY;
if (f->buffer == f->next->next->buffer) {
f->affinity = 1;
f->next->affinity = 0;
f->next->next->affinity = -1;
f->next->flags |= F_HAVE_AFFINITY;
f->next->next->flags |= F_HAVE_AFFINITY;
return;
}
if (1) {
for (i = 0; i < c->metric_len; i++) {
int lv = f->prev->var[i];
int rv = f->next->var[i];
int v = f->var[i];
int lc = f->comb[i] - (v+lv) + ABS(v-lv);
int rc = f->next->comb[i] - (v+rv) + ABS(v-rv);
lc = lc>0 ? lc : 0;
rc = rc>0 ? rc : 0;
l = lc - rc;
if (l > max_l) max_l = l;
if (-l > max_r) max_r = -l;
}
if (max_l + max_r < 64) return;
if (max_r > 6*max_l) f->affinity = -1;
else if (max_l > 6*max_r) f->affinity = 1;
} else {
for (i = 0; i < c->metric_len; i++) {
l = f->comb[i] - f->next->comb[i];
if (l > max_l) max_l = l;
if (-l > max_r) max_r = -l;
}
if (max_l + max_r < 64) return;
if (max_r > 2*max_l) f->affinity = -1;
else if (max_l > 2*max_r) f->affinity = 1;
}
}
static void foo(struct pullup_context *c)
{
struct pullup_field *f = c->first;
int i, n = queue_length(f, c->last);
for (i = 0; i < n-1; i++) {
if (i < n-3) compute_breaks(c, f);
compute_affinity(c, f);
f = f->next;
}
}
static int decide_frame_length(struct pullup_context *c)
{
struct pullup_field *f0 = c->first;
struct pullup_field *f1 = f0->next;
struct pullup_field *f2 = f1->next;
int l;
if (queue_length(c->first, c->last) < 4) return 0;
foo(c);
if (f0->affinity == -1) return 1;
l = find_first_break(f0, 3);
if (l == 1 && c->strict_breaks < 0) l = 0;
switch (l) {
case 1:
if (c->strict_breaks < 1 && f0->affinity == 1 && f1->affinity == -1)
return 2;
else return 1;
case 2:
/* FIXME: strictly speaking, f0->prev is no longer valid... :) */
if (c->strict_pairs
&& (f0->prev->breaks & BREAK_RIGHT) && (f2->breaks & BREAK_LEFT)
&& (f0->affinity != 1 || f1->affinity != -1) )
return 1;
if (f1->affinity == 1) return 1;
else return 2;
case 3:
if (f2->affinity == 1) return 2;
else return 3;
default:
/* 9 possibilities covered before switch */
if (f1->affinity == 1) return 1; /* covers 6 */
else if (f1->affinity == -1) return 2; /* covers 6 */
else if (f2->affinity == -1) { /* covers 2 */
if (f0->affinity == 1) return 3;
else return 1;
}
else return 2; /* the remaining 6 */
}
}
static void print_aff_and_breaks(struct pullup_context *c, struct pullup_field *f)
{
int i;
struct pullup_field *f0 = f;
const char aff_l[] = "+..", aff_r[] = "..+";
printf("\naffinity: ");
for (i = 0; i < 4; i++) {
printf("%c%d%c", aff_l[1+f->affinity], i, aff_r[1+f->affinity]);
f = f->next;
}
f = f0;
printf("\nbreaks: ");
for (i=0; i<4; i++) {
printf("%c%d%c", f->breaks & BREAK_LEFT ? '|' : '.', i, f->breaks & BREAK_RIGHT ? '|' : '.');
f = f->next;
}
printf("\n");
}
struct pullup_frame *pullup_get_frame(struct pullup_context *c)
{
int i;
struct pullup_frame *fr = c->frame;
int n = decide_frame_length(c);
int aff = c->first->next->affinity;
if (!n) return 0;
if (fr->lock) return 0;
if (c->verbose) {
print_aff_and_breaks(c, c->first);
printf("duration: %d \n", n);
}
fr->lock++;
fr->length = n;
fr->parity = c->first->parity;
fr->buffer = 0;
for (i = 0; i < n; i++) {
/* We cheat and steal the buffer without release+relock */
fr->ifields[i] = c->first->buffer;
c->first->buffer = 0;
c->first = c->first->next;
}
if (n == 1) {
fr->ofields[fr->parity] = fr->ifields[0];
fr->ofields[fr->parity^1] = 0;
} else if (n == 2) {
fr->ofields[fr->parity] = fr->ifields[0];
fr->ofields[fr->parity^1] = fr->ifields[1];
} else if (n == 3) {
if (aff == 0)
aff = (fr->ifields[0] == fr->ifields[1]) ? -1 : 1;
/* else if (c->verbose) printf("forced aff: %d \n", aff); */
fr->ofields[fr->parity] = fr->ifields[1+aff];
fr->ofields[fr->parity^1] = fr->ifields[1];
}
pullup_lock_buffer(fr->ofields[0], 0);
pullup_lock_buffer(fr->ofields[1], 1);
if (fr->ofields[0] == fr->ofields[1]) {
fr->buffer = fr->ofields[0];
pullup_lock_buffer(fr->buffer, 2);
return fr;
}
return fr;
}
static void copy_field(struct pullup_context *c, struct pullup_buffer *dest,
struct pullup_buffer *src, int parity)
{
int i, j;
unsigned char *d, *s;
for (i = 0; i < c->nplanes; i++) {
s = src->planes[i] + parity*c->stride[i];
d = dest->planes[i] + parity*c->stride[i];
for (j = c->h[i]>>1; j; j--) {
memcpy(d, s, c->stride[i]);
s += c->stride[i]<<1;
d += c->stride[i]<<1;
}
}
}
void pullup_pack_frame(struct pullup_context *c, struct pullup_frame *fr)
{
int i;
if (fr->buffer) return;
if (fr->length < 2) return; /* FIXME: deal with this */
for (i = 0; i < 2; i++)
{
if (fr->ofields[i]->lock[i^1]) continue;
fr->buffer = fr->ofields[i];
pullup_lock_buffer(fr->buffer, 2);
copy_field(c, fr->buffer, fr->ofields[i^1], i^1);
return;
}
fr->buffer = pullup_get_buffer(c, 2);
copy_field(c, fr->buffer, fr->ofields[0], 0);
copy_field(c, fr->buffer, fr->ofields[1], 1);
}
void pullup_release_frame(struct pullup_frame *fr)
{
int i;
for (i = 0; i < fr->length; i++)
pullup_release_buffer(fr->ifields[i], fr->parity ^ (i&1));
pullup_release_buffer(fr->ofields[0], 0);
pullup_release_buffer(fr->ofields[1], 1);
if (fr->buffer) pullup_release_buffer(fr->buffer, 2);
fr->lock--;
}
struct pullup_context *pullup_alloc_context(void)
{
struct pullup_context *c;
c = calloc(1, sizeof(struct pullup_context));
return c;
}
void pullup_preinit_context(struct pullup_context *c)
{
c->bpp = calloc(c->nplanes, sizeof(int));
c->w = calloc(c->nplanes, sizeof(int));
c->h = calloc(c->nplanes, sizeof(int));
c->stride = calloc(c->nplanes, sizeof(int));
c->background = calloc(c->nplanes, sizeof(int));
}
void pullup_init_context(struct pullup_context *c)
{
int mp = c->metric_plane;
if (c->nbuffers < 10) c->nbuffers = 10;
c->buffers = calloc(c->nbuffers, sizeof (struct pullup_buffer));
c->metric_w = (c->w[mp] - ((c->junk_left + c->junk_right) << 3)) >> 3;
c->metric_h = (c->h[mp] - ((c->junk_top + c->junk_bottom) << 1)) >> 3;
c->metric_offset = c->junk_left*c->bpp[mp] + (c->junk_top<<1)*c->stride[mp];
c->metric_len = c->metric_w * c->metric_h;
c->head = make_field_queue(c, 8);
c->frame = calloc(1, sizeof (struct pullup_frame));
c->frame->ifields = calloc(3, sizeof (struct pullup_buffer *));
switch(c->format) {
case PULLUP_FMT_Y:
c->diff = diff_y;
c->comb = licomb_y;
c->var = var_y;
#if ARCH_X86
#if HAVE_MMX
if (c->cpu & PULLUP_CPU_MMX) {
c->diff = diff_y_mmx;
c->comb = licomb_y_mmx;
c->var = var_y_mmx;
}
#endif
#endif
/* c->comb = qpcomb_y; */
break;
#if 0
case PULLUP_FMT_YUY2:
c->diff = diff_yuy2;
break;
case PULLUP_FMT_RGB32:
c->diff = diff_rgb32;
break;
#endif
}
}
void pullup_free_context(struct pullup_context *c)
{
struct pullup_field *f;
free(c->buffers);
f = c->head;
do {
if (!f) break;
free(f->diffs);
free(f->comb);
f = f->next;
free(f->prev);
} while (f != c->head);
free(c->frame);
free(c);
}
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