55 |
* 22.12.2001 lock based interpolation |
* 22.12.2001 lock based interpolation |
56 |
* 01.12.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
* 01.12.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
57 |
* |
* |
58 |
* $Id: decoder.c,v 1.37.2.5 2002-10-11 15:07:32 Isibaar Exp $ |
* $Id: decoder.c,v 1.37.2.6 2002-10-30 18:01:48 Isibaar Exp $ |
59 |
* |
* |
60 |
*************************************************************************/ |
*************************************************************************/ |
61 |
|
|
84 |
#include "prediction/mbprediction.h" |
#include "prediction/mbprediction.h" |
85 |
#include "utils/timer.h" |
#include "utils/timer.h" |
86 |
#include "utils/emms.h" |
#include "utils/emms.h" |
87 |
|
#include "motion/motion.h" |
88 |
|
|
89 |
#include "image/image.h" |
#include "image/image.h" |
90 |
#include "image/colorspace.h" |
#include "image/colorspace.h" |
326 |
|
|
327 |
#define SIGN(X) (((X)>0)?1:-1) |
#define SIGN(X) (((X)>0)?1:-1) |
328 |
#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
|
static const uint32_t roundtab[16] = |
|
|
{ 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; |
|
|
|
|
329 |
|
|
330 |
// decode an inter macroblock |
// decode an inter macroblock |
331 |
|
|
362 |
|
|
363 |
if (dec->quarterpel) |
if (dec->quarterpel) |
364 |
{ |
{ |
365 |
uv_dx = (uv_dx >> 1) | (uv_dx & 1); |
uv_dx = (uv_dx >> 2) + roundtab_78[uv_dx & 0x7]; |
366 |
uv_dy = (uv_dy >> 1) | (uv_dy & 1); |
uv_dy = (uv_dy >> 2) + roundtab_78[uv_dy & 0x7]; |
367 |
|
} |
368 |
|
else { |
369 |
|
uv_dx = (uv_dx >> 1) + roundtab_79[uv_dx & 0x3]; |
370 |
|
uv_dy = (uv_dy >> 1) + roundtab_79[uv_dy & 0x3]; |
371 |
} |
} |
|
|
|
|
uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
|
|
uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
|
372 |
|
|
373 |
start_timer(); |
start_timer(); |
374 |
if(dec->quarterpel) { |
if(dec->quarterpel) { |
395 |
|
|
396 |
} else { |
} else { |
397 |
int sum; |
int sum; |
|
sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
|
398 |
|
|
399 |
if (dec->quarterpel) |
if (dec->quarterpel) |
400 |
{ |
sum = (pMB->mvs[0].x / 2) + (pMB->mvs[1].x / 2) + (pMB->mvs[2].x / 2) + (pMB->mvs[3].x / 2); |
401 |
sum /= 2; |
else |
402 |
} |
sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
|
|
|
|
uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
|
403 |
|
|
404 |
sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
uv_dx = (sum >> 3) + roundtab_76[sum & 0xf]; |
405 |
|
|
406 |
if (dec->quarterpel) |
if (dec->quarterpel) |
407 |
{ |
sum = (pMB->mvs[0].y / 2) + (pMB->mvs[1].y / 2) + (pMB->mvs[2].y / 2) + (pMB->mvs[3].y / 2); |
408 |
sum /= 2; |
else |
409 |
} |
sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
410 |
|
|
411 |
uv_dy = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
uv_dy = (sum >> 3) + roundtab_76[sum & 0xf]; |
412 |
|
|
413 |
start_timer(); |
start_timer(); |
414 |
if(dec->quarterpel) { |
if(dec->quarterpel) { |