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* 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 1.37.2.3 2002-10-10 12:16:00 Isibaar Exp $ |
* $Id: decoder.c,v 1.37.2.6 2002-10-30 18:01:48 Isibaar Exp $ |
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* |
* |
60 |
*************************************************************************/ |
*************************************************************************/ |
61 |
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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 |
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#include "motion/motion.h" |
88 |
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89 |
#include "image/image.h" |
#include "image/image.h" |
90 |
#include "image/colorspace.h" |
#include "image/colorspace.h" |
326 |
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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)) |
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static const uint32_t roundtab[16] = |
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{ 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; |
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329 |
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330 |
// decode an inter macroblock |
// decode an inter macroblock |
331 |
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362 |
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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 |
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} |
368 |
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else { |
369 |
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uv_dx = (uv_dx >> 1) + roundtab_79[uv_dx & 0x3]; |
370 |
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uv_dy = (uv_dy >> 1) + roundtab_79[uv_dy & 0x3]; |
371 |
} |
} |
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uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; |
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uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; |
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372 |
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373 |
start_timer(); |
start_timer(); |
374 |
if(dec->quarterpel) { |
if(dec->quarterpel) { |
395 |
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396 |
} else { |
} else { |
397 |
int sum; |
int sum; |
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sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
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398 |
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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; |
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uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2)); |
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403 |
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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 |
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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 |
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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 |
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413 |
start_timer(); |
start_timer(); |
414 |
if(dec->quarterpel) { |
if(dec->quarterpel) { |
745 |
rounding); |
rounding); |
746 |
} else // not coded |
} else // not coded |
747 |
{ |
{ |
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DEBUG2("P-frame MB at (X,Y)=",x,y); |
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748 |
mb->mode = MODE_NOT_CODED; |
mb->mode = MODE_NOT_CODED; |
749 |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; |
mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; |
750 |
mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; |
mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; |
959 |
stop_transfer_timer(); |
stop_transfer_timer(); |
960 |
} |
} |
961 |
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962 |
// add by MinChen <chenm001@163.com> |
// add by MinChen <chenm001@163.com> |
963 |
// decode an B-frame direct & inter macroblock |
// decode an B-frame direct & inter macroblock |
964 |
void |
void |
1076 |
dec->refn[2].y + (16 * y_pos * stride) + 16 * x_pos + 8, |
dec->refn[2].y + (16 * y_pos * stride) + 16 * x_pos + 8, |
1077 |
stride, 0); |
stride, 0); |
1078 |
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1079 |
interpolate8x8_avg2(dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos, |
interpolate8x8_avg2(dec->cur.y + ((16 * y_pos + 8) * stride) + 16 * x_pos, |
1080 |
dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos, |
dec->cur.y + ((16 * y_pos + 8) * stride) + 16 * x_pos, |
1081 |
dec->refn[2].y + (16 * (y_pos + 8) * stride) + 16 * x_pos, |
dec->refn[2].y + ((16 * y_pos + 8) * stride) + 16 * x_pos, |
1082 |
stride, 0); |
stride, 0); |
1083 |
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1084 |
interpolate8x8_avg2(dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8, |
interpolate8x8_avg2(dec->cur.y + ((16 * y_pos + 8) * stride) + 16 * x_pos + 8, |
1085 |
dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8, |
dec->cur.y + ((16 * y_pos + 8) * stride) + 16 * x_pos + 8, |
1086 |
dec->refn[2].y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8, |
dec->refn[2].y + ((16 * y_pos + 8) * stride) + 16 * x_pos + 8, |
1087 |
stride, 0); |
stride, 0); |
1088 |
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1089 |
interpolate8x8_avg2(dec->cur.u + (8 * y_pos * stride) + 8 * x_pos, |
interpolate8x8_avg2(dec->cur.u + (8 * y_pos * stride2) + 8 * x_pos, |
1090 |
dec->cur.u + (8 * y_pos * stride) + 8 * x_pos, |
dec->cur.u + (8 * y_pos * stride2) + 8 * x_pos, |
1091 |
dec->refn[2].u + (8 * y_pos * stride) + 8 * x_pos, |
dec->refn[2].u + (8 * y_pos * stride2) + 8 * x_pos, |
1092 |
stride2, 0); |
stride2, 0); |
1093 |
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|
1094 |
interpolate8x8_avg2(dec->cur.v + (8 * y_pos * stride) + 8 * x_pos, |
interpolate8x8_avg2(dec->cur.v + (8 * y_pos * stride2) + 8 * x_pos, |
1095 |
dec->cur.v + (8 * y_pos * stride) + 8 * x_pos, |
dec->cur.v + (8 * y_pos * stride2) + 8 * x_pos, |
1096 |
dec->refn[2].v + (8 * y_pos * stride) + 8 * x_pos, |
dec->refn[2].v + (8 * y_pos * stride2) + 8 * x_pos, |
1097 |
stride2, 0); |
stride2, 0); |
1098 |
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1099 |
stop_comp_timer(); |
stop_comp_timer(); |
1381 |
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1382 |
BitstreamInit(&bs, frame->bitstream, frame->length); |
BitstreamInit(&bs, frame->bitstream, frame->length); |
1383 |
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1384 |
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if(BitstreamShowBits(&bs, 8) == 0x7f) |
1385 |
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return XVID_ERR_OK; |
1386 |
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1387 |
// add by chenm001 <chenm001@163.com> |
// add by chenm001 <chenm001@163.com> |
1388 |
// for support B-frame to reference last 2 frame |
// for support B-frame to reference last 2 frame |
1389 |
dec->frames++; |
dec->frames++; |
1425 |
case N_VOP: // vop not coded |
case N_VOP: // vop not coded |
1426 |
// when low_delay==0, N_VOP's should interpolate between the past and future frames |
// when low_delay==0, N_VOP's should interpolate between the past and future frames |
1427 |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
image_copy(&dec->cur, &dec->refn[0], dec->edged_width, dec->height); |
1428 |
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#ifdef BFRAMES_DEC |
1429 |
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DEBUG1("N_VOP Time=", dec->time); |
1430 |
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#endif |
1431 |
break; |
break; |
1432 |
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1433 |
default: |
default: |