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[libav.git] / libavcodec / mpegvideo.c
1 /*
2 * The simplest mpeg encoder (well, it was the simplest!)
3 * Copyright (c) 2000,2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * 4MV & hq & b-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
20 */
21 #include "avcodec.h"
22 #include "dsputil.h"
23 #include "mpegvideo.h"
24
25 #ifdef USE_FASTMEMCPY
26 #include "fastmemcpy.h"
27 #endif
28
29 static void encode_picture(MpegEncContext *s, int picture_number);
30 static void dct_unquantize_mpeg1_c(MpegEncContext *s,
31 DCTELEM *block, int n, int qscale);
32 static void dct_unquantize_mpeg2_c(MpegEncContext *s,
33 DCTELEM *block, int n, int qscale);
34 static void dct_unquantize_h263_c(MpegEncContext *s,
35 DCTELEM *block, int n, int qscale);
36 static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w);
37 static int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
38
39 int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow)= dct_quantize_c;
40 void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w)= draw_edges_c;
41
42 #define EDGE_WIDTH 16
43
44 /* enable all paranoid tests for rounding, overflows, etc... */
45 //#define PARANOID
46
47 //#define DEBUG
48
49
50 /* for jpeg fast DCT */
51 #define CONST_BITS 14
52
53 static const unsigned short aanscales[64] = {
54 /* precomputed values scaled up by 14 bits */
55 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
56 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
57 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
58 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
59 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
60 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
61 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
62 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
63 };
64
65 static UINT8 h263_chroma_roundtab[16] = {
66 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
67 };
68
69 static UINT16 default_mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
70 static UINT8 default_fcode_tab[MAX_MV*2+1];
71
72 extern UINT8 zigzag_end[64];
73
74 /* default motion estimation */
75 int motion_estimation_method = ME_EPZS;
76
77 static void convert_matrix(int (*qmat)[64], uint16_t (*qmat16)[64], uint16_t (*qmat16_bias)[64],
78 const UINT16 *quant_matrix, int bias)
79 {
80 int qscale;
81
82 for(qscale=1; qscale<32; qscale++){
83 int i;
84 if (av_fdct == fdct_ifast) {
85 for(i=0;i<64;i++) {
86 const int j= block_permute_op(i);
87 /* 16 <= qscale * quant_matrix[i] <= 7905 */
88 /* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
89 /* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
90 /* 3444240 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
91
92 qmat[qscale][j] = (int)((UINT64_C(1) << (QMAT_SHIFT + 11)) /
93 (aanscales[i] * qscale * quant_matrix[j]));
94 }
95 } else {
96 for(i=0;i<64;i++) {
97 /* We can safely suppose that 16 <= quant_matrix[i] <= 255
98 So 16 <= qscale * quant_matrix[i] <= 7905
99 so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
100 so 32768 >= (1<<19) / (qscale * quant_matrix[i]) >= 67
101 */
102 qmat [qscale][i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[i]);
103 qmat16[qscale][i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[block_permute_op(i)]);
104
105 if(qmat16[qscale][i]==0 || qmat16[qscale][i]==128*256) qmat16[qscale][i]=128*256-1;
106
107 qmat16_bias[qscale][i]= ROUNDED_DIV(bias<<(16-QUANT_BIAS_SHIFT), qmat16[qscale][i]);
108 }
109 }
110 }
111 }
112 // move into common.c perhaps
113 #define CHECKED_ALLOCZ(p, size)\
114 {\
115 p= av_mallocz(size);\
116 if(p==NULL){\
117 perror("malloc");\
118 goto fail;\
119 }\
120 }
121
122 /* init common structure for both encoder and decoder */
123 int MPV_common_init(MpegEncContext *s)
124 {
125 int c_size, i;
126 UINT8 *pict;
127
128 s->dct_unquantize_h263 = dct_unquantize_h263_c;
129 s->dct_unquantize_mpeg1 = dct_unquantize_mpeg1_c;
130 s->dct_unquantize_mpeg2 = dct_unquantize_mpeg2_c;
131
132 #ifdef HAVE_MMX
133 MPV_common_init_mmx(s);
134 #endif
135 //setup default unquantizers (mpeg4 might change it later)
136 if(s->out_format == FMT_H263)
137 s->dct_unquantize = s->dct_unquantize_h263;
138 else
139 s->dct_unquantize = s->dct_unquantize_mpeg1;
140
141 s->mb_width = (s->width + 15) / 16;
142 s->mb_height = (s->height + 15) / 16;
143 s->mb_num = s->mb_width * s->mb_height;
144 s->linesize = s->mb_width * 16 + 2 * EDGE_WIDTH;
145
146 for(i=0;i<3;i++) {
147 int w, h, shift, pict_start;
148
149 w = s->linesize;
150 h = s->mb_height * 16 + 2 * EDGE_WIDTH;
151 shift = (i == 0) ? 0 : 1;
152 c_size = (w >> shift) * (h >> shift);
153 pict_start = (w >> shift) * (EDGE_WIDTH >> shift) + (EDGE_WIDTH >> shift);
154
155 CHECKED_ALLOCZ(pict, c_size)
156 s->last_picture_base[i] = pict;
157 s->last_picture[i] = pict + pict_start;
158
159 CHECKED_ALLOCZ(pict, c_size)
160 s->next_picture_base[i] = pict;
161 s->next_picture[i] = pict + pict_start;
162
163 if (s->has_b_frames || s->codec_id==CODEC_ID_MPEG4) {
164 /* Note the MPEG4 stuff is here cuz of buggy encoders which dont set the low_delay flag but
165 do low-delay encoding, so we cant allways distinguish b-frame containing streams from low_delay streams */
166 CHECKED_ALLOCZ(pict, c_size)
167 s->aux_picture_base[i] = pict;
168 s->aux_picture[i] = pict + pict_start;
169 }
170 }
171
172 if (s->encoding) {
173 int j;
174 int mv_table_size= (s->mb_width+2)*(s->mb_height+2);
175
176 CHECKED_ALLOCZ(s->mb_var , s->mb_num * sizeof(INT16))
177 CHECKED_ALLOCZ(s->mc_mb_var, s->mb_num * sizeof(INT16))
178
179 /* Allocate MV tables */
180 CHECKED_ALLOCZ(s->p_mv_table , mv_table_size * 2 * sizeof(INT16))
181 CHECKED_ALLOCZ(s->b_forw_mv_table , mv_table_size * 2 * sizeof(INT16))
182 CHECKED_ALLOCZ(s->b_back_mv_table , mv_table_size * 2 * sizeof(INT16))
183 CHECKED_ALLOCZ(s->b_bidir_forw_mv_table , mv_table_size * 2 * sizeof(INT16))
184 CHECKED_ALLOCZ(s->b_bidir_back_mv_table , mv_table_size * 2 * sizeof(INT16))
185 CHECKED_ALLOCZ(s->b_direct_forw_mv_table, mv_table_size * 2 * sizeof(INT16))
186 CHECKED_ALLOCZ(s->b_direct_back_mv_table, mv_table_size * 2 * sizeof(INT16))
187 CHECKED_ALLOCZ(s->b_direct_mv_table , mv_table_size * 2 * sizeof(INT16))
188
189 CHECKED_ALLOCZ(s->me_scratchpad, s->linesize*16*3*sizeof(uint8_t))
190
191 CHECKED_ALLOCZ(s->me_map , ME_MAP_SIZE*sizeof(uint32_t))
192 CHECKED_ALLOCZ(s->me_score_map, ME_MAP_SIZE*sizeof(uint16_t))
193
194 if(s->max_b_frames){
195 for(j=0; j<REORDER_BUFFER_SIZE; j++){
196 int i;
197 for(i=0;i<3;i++) {
198 int w, h, shift;
199
200 w = s->linesize;
201 h = s->mb_height * 16;
202 shift = (i == 0) ? 0 : 1;
203 c_size = (w >> shift) * (h >> shift);
204
205 CHECKED_ALLOCZ(pict, c_size);
206 s->picture_buffer[j][i] = pict;
207 }
208 }
209 }
210
211 if(s->codec_id==CODEC_ID_MPEG4){
212 CHECKED_ALLOCZ(s->tex_pb_buffer, PB_BUFFER_SIZE);
213 CHECKED_ALLOCZ( s->pb2_buffer, PB_BUFFER_SIZE);
214 }
215 }
216
217 if (s->out_format == FMT_H263 || s->encoding) {
218 int size;
219 /* Allocate MB type table */
220 CHECKED_ALLOCZ(s->mb_type , s->mb_num * sizeof(UINT8))
221
222 /* MV prediction */
223 size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
224 CHECKED_ALLOCZ(s->motion_val, size * 2 * sizeof(INT16));
225 }
226
227 if (s->h263_pred || s->h263_plus) {
228 int y_size, c_size, i, size;
229
230 /* dc values */
231
232 y_size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
233 c_size = (s->mb_width + 2) * (s->mb_height + 2);
234 size = y_size + 2 * c_size;
235 CHECKED_ALLOCZ(s->dc_val[0], size * sizeof(INT16));
236 s->dc_val[1] = s->dc_val[0] + y_size;
237 s->dc_val[2] = s->dc_val[1] + c_size;
238 for(i=0;i<size;i++)
239 s->dc_val[0][i] = 1024;
240
241 /* ac values */
242 CHECKED_ALLOCZ(s->ac_val[0], size * sizeof(INT16) * 16);
243 s->ac_val[1] = s->ac_val[0] + y_size;
244 s->ac_val[2] = s->ac_val[1] + c_size;
245
246 /* cbp values */
247 CHECKED_ALLOCZ(s->coded_block, y_size);
248
249 /* which mb is a intra block */
250 CHECKED_ALLOCZ(s->mbintra_table, s->mb_num);
251 memset(s->mbintra_table, 1, s->mb_num);
252
253 /* divx501 bitstream reorder buffer */
254 CHECKED_ALLOCZ(s->bitstream_buffer, BITSTREAM_BUFFER_SIZE);
255
256 /* cbp, ac_pred, pred_dir */
257 CHECKED_ALLOCZ(s->cbp_table , s->mb_num * sizeof(UINT8))
258 CHECKED_ALLOCZ(s->pred_dir_table, s->mb_num * sizeof(UINT8))
259
260 CHECKED_ALLOCZ(s->qscale_table , s->mb_num * sizeof(UINT8))
261 }
262 /* default structure is frame */
263 s->picture_structure = PICT_FRAME;
264
265 /* init macroblock skip table */
266 CHECKED_ALLOCZ(s->mbskip_table, s->mb_num);
267
268 s->block= s->blocks[0];
269
270 s->context_initialized = 1;
271 return 0;
272 fail:
273 MPV_common_end(s);
274 return -1;
275 }
276
277
278 //extern int sads;
279
280 /* init common structure for both encoder and decoder */
281 void MPV_common_end(MpegEncContext *s)
282 {
283 int i;
284
285 av_freep(&s->mb_type);
286 av_freep(&s->mb_var);
287 av_freep(&s->mc_mb_var);
288 av_freep(&s->p_mv_table);
289 av_freep(&s->b_forw_mv_table);
290 av_freep(&s->b_back_mv_table);
291 av_freep(&s->b_bidir_forw_mv_table);
292 av_freep(&s->b_bidir_back_mv_table);
293 av_freep(&s->b_direct_forw_mv_table);
294 av_freep(&s->b_direct_back_mv_table);
295 av_freep(&s->b_direct_mv_table);
296 av_freep(&s->motion_val);
297 av_freep(&s->dc_val[0]);
298 av_freep(&s->ac_val[0]);
299 av_freep(&s->coded_block);
300 av_freep(&s->mbintra_table);
301 av_freep(&s->cbp_table);
302 av_freep(&s->pred_dir_table);
303 av_freep(&s->qscale_table);
304 av_freep(&s->me_scratchpad);
305 av_freep(&s->me_map);
306 av_freep(&s->me_score_map);
307
308 av_freep(&s->mbskip_table);
309 av_freep(&s->bitstream_buffer);
310 av_freep(&s->tex_pb_buffer);
311 av_freep(&s->pb2_buffer);
312 for(i=0;i<3;i++) {
313 int j;
314 av_freep(&s->last_picture_base[i]);
315 av_freep(&s->next_picture_base[i]);
316 av_freep(&s->aux_picture_base[i]);
317 for(j=0; j<REORDER_BUFFER_SIZE; j++){
318 av_freep(&s->picture_buffer[j][i]);
319 }
320 }
321 s->context_initialized = 0;
322 }
323
324 /* init video encoder */
325 int MPV_encode_init(AVCodecContext *avctx)
326 {
327 MpegEncContext *s = avctx->priv_data;
328 int i;
329
330 avctx->pix_fmt = PIX_FMT_YUV420P;
331
332 s->bit_rate = avctx->bit_rate;
333 s->bit_rate_tolerance = avctx->bit_rate_tolerance;
334 s->frame_rate = avctx->frame_rate;
335 s->width = avctx->width;
336 s->height = avctx->height;
337 if(avctx->gop_size > 600){
338 fprintf(stderr, "Warning keyframe interval too large! reducing it ...\n");
339 avctx->gop_size=600;
340 }
341 s->gop_size = avctx->gop_size;
342 s->rtp_mode = avctx->rtp_mode;
343 s->rtp_payload_size = avctx->rtp_payload_size;
344 if (avctx->rtp_callback)
345 s->rtp_callback = avctx->rtp_callback;
346 s->qmin= avctx->qmin;
347 s->qmax= avctx->qmax;
348 s->max_qdiff= avctx->max_qdiff;
349 s->qcompress= avctx->qcompress;
350 s->qblur= avctx->qblur;
351 s->b_quant_factor= avctx->b_quant_factor;
352 s->b_quant_offset= avctx->b_quant_offset;
353 s->avctx = avctx;
354 s->aspect_ratio_info= avctx->aspect_ratio_info;
355 s->flags= avctx->flags;
356 s->max_b_frames= avctx->max_b_frames;
357 s->rc_strategy= avctx->rc_strategy;
358 s->b_frame_strategy= avctx->b_frame_strategy;
359 s->codec_id= avctx->codec->id;
360 s->luma_elim_threshold = avctx->luma_elim_threshold;
361 s->chroma_elim_threshold= avctx->chroma_elim_threshold;
362 s->strict_std_compliance= avctx->strict_std_compliance;
363 s->data_partitioning= avctx->flags & CODEC_FLAG_PART;
364
365 if (s->gop_size <= 1) {
366 s->intra_only = 1;
367 s->gop_size = 12;
368 } else {
369 s->intra_only = 0;
370 }
371
372 /* ME algorithm */
373 if (avctx->me_method == 0)
374 /* For compatibility */
375 s->me_method = motion_estimation_method;
376 else
377 s->me_method = avctx->me_method;
378
379 /* Fixed QSCALE */
380 s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE);
381
382 switch(avctx->codec->id) {
383 case CODEC_ID_MPEG1VIDEO:
384 s->out_format = FMT_MPEG1;
385 avctx->delay=0; //FIXME not sure, should check the spec
386 break;
387 case CODEC_ID_MJPEG:
388 s->out_format = FMT_MJPEG;
389 s->intra_only = 1; /* force intra only for jpeg */
390 s->mjpeg_write_tables = 1; /* write all tables */
391 s->mjpeg_data_only_frames = 0; /* write all the needed headers */
392 s->mjpeg_vsample[0] = 2; /* set up default sampling factors */
393 s->mjpeg_vsample[1] = 1; /* the only currently supported values */
394 s->mjpeg_vsample[2] = 1;
395 s->mjpeg_hsample[0] = 2;
396 s->mjpeg_hsample[1] = 1;
397 s->mjpeg_hsample[2] = 1;
398 if (mjpeg_init(s) < 0)
399 return -1;
400 avctx->delay=0;
401 break;
402 case CODEC_ID_H263:
403 if (h263_get_picture_format(s->width, s->height) == 7) {
404 printf("Input picture size isn't suitable for h263 codec! try h263+\n");
405 return -1;
406 }
407 s->out_format = FMT_H263;
408 avctx->delay=0;
409 break;
410 case CODEC_ID_H263P:
411 s->out_format = FMT_H263;
412 s->rtp_mode = 1;
413 s->rtp_payload_size = 1200;
414 s->h263_plus = 1;
415 s->unrestricted_mv = 1;
416 s->h263_aic = 1;
417
418 /* These are just to be sure */
419 s->umvplus = 0;
420 s->umvplus_dec = 0;
421 avctx->delay=0;
422 break;
423 case CODEC_ID_RV10:
424 s->out_format = FMT_H263;
425 s->h263_rv10 = 1;
426 avctx->delay=0;
427 break;
428 case CODEC_ID_MPEG4:
429 s->out_format = FMT_H263;
430 s->h263_pred = 1;
431 s->unrestricted_mv = 1;
432 s->has_b_frames= s->max_b_frames ? 1 : 0;
433 s->low_delay=0;
434 avctx->delay= s->low_delay ? 0 : (s->max_b_frames + 1);
435 break;
436 case CODEC_ID_MSMPEG4V1:
437 s->out_format = FMT_H263;
438 s->h263_msmpeg4 = 1;
439 s->h263_pred = 1;
440 s->unrestricted_mv = 1;
441 s->msmpeg4_version= 1;
442 avctx->delay=0;
443 break;
444 case CODEC_ID_MSMPEG4V2:
445 s->out_format = FMT_H263;
446 s->h263_msmpeg4 = 1;
447 s->h263_pred = 1;
448 s->unrestricted_mv = 1;
449 s->msmpeg4_version= 2;
450 avctx->delay=0;
451 break;
452 case CODEC_ID_MSMPEG4V3:
453 s->out_format = FMT_H263;
454 s->h263_msmpeg4 = 1;
455 s->h263_pred = 1;
456 s->unrestricted_mv = 1;
457 s->msmpeg4_version= 3;
458 avctx->delay=0;
459 break;
460 default:
461 return -1;
462 }
463
464 { /* set up some save defaults, some codecs might override them later */
465 static int done=0;
466 if(!done){
467 int i;
468 done=1;
469 memset(default_mv_penalty, 0, sizeof(UINT16)*(MAX_FCODE+1)*(2*MAX_MV+1));
470 memset(default_fcode_tab , 0, sizeof(UINT8)*(2*MAX_MV+1));
471
472 for(i=-16; i<16; i++){
473 default_fcode_tab[i + MAX_MV]= 1;
474 }
475 }
476 }
477 s->mv_penalty= default_mv_penalty;
478 s->fcode_tab= default_fcode_tab;
479
480 if (s->out_format == FMT_H263)
481 h263_encode_init(s);
482 else if (s->out_format == FMT_MPEG1)
483 mpeg1_encode_init(s);
484
485 /* dont use mv_penalty table for crap MV as it would be confused */
486 if (s->me_method < ME_EPZS) s->mv_penalty = default_mv_penalty;
487
488 s->encoding = 1;
489
490 /* init */
491 if (MPV_common_init(s) < 0)
492 return -1;
493
494 /* init default q matrix */
495 for(i=0;i<64;i++) {
496 if(s->out_format == FMT_H263)
497 s->intra_matrix[i] = default_non_intra_matrix[i];
498 else
499 s->intra_matrix[i] = default_intra_matrix[i];
500
501 s->inter_matrix[i] = default_non_intra_matrix[i];
502 }
503
504 /* precompute matrix */
505 /* for mjpeg, we do include qscale in the matrix */
506 if (s->out_format != FMT_MJPEG) {
507 convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->q_intra_matrix16_bias,
508 s->intra_matrix, s->intra_quant_bias);
509 convert_matrix(s->q_inter_matrix, s->q_inter_matrix16, s->q_inter_matrix16_bias,
510 s->inter_matrix, s->inter_quant_bias);
511 }
512
513 if(ff_rate_control_init(s) < 0)
514 return -1;
515
516 s->picture_number = 0;
517 s->picture_in_gop_number = 0;
518 s->fake_picture_number = 0;
519 /* motion detector init */
520 s->f_code = 1;
521 s->b_code = 1;
522
523 return 0;
524 }
525
526 int MPV_encode_end(AVCodecContext *avctx)
527 {
528 MpegEncContext *s = avctx->priv_data;
529
530 #ifdef STATS
531 print_stats();
532 #endif
533
534 ff_rate_control_uninit(s);
535
536 MPV_common_end(s);
537 if (s->out_format == FMT_MJPEG)
538 mjpeg_close(s);
539
540 return 0;
541 }
542
543 /* draw the edges of width 'w' of an image of size width, height */
544 static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w)
545 {
546 UINT8 *ptr, *last_line;
547 int i;
548
549 last_line = buf + (height - 1) * wrap;
550 for(i=0;i<w;i++) {
551 /* top and bottom */
552 memcpy(buf - (i + 1) * wrap, buf, width);
553 memcpy(last_line + (i + 1) * wrap, last_line, width);
554 }
555 /* left and right */
556 ptr = buf;
557 for(i=0;i<height;i++) {
558 memset(ptr - w, ptr[0], w);
559 memset(ptr + width, ptr[width-1], w);
560 ptr += wrap;
561 }
562 /* corners */
563 for(i=0;i<w;i++) {
564 memset(buf - (i + 1) * wrap - w, buf[0], w); /* top left */
565 memset(buf - (i + 1) * wrap + width, buf[width-1], w); /* top right */
566 memset(last_line + (i + 1) * wrap - w, last_line[0], w); /* top left */
567 memset(last_line + (i + 1) * wrap + width, last_line[width-1], w); /* top right */
568 }
569 }
570
571 /* generic function for encode/decode called before a frame is coded/decoded */
572 void MPV_frame_start(MpegEncContext *s)
573 {
574 int i;
575 UINT8 *tmp;
576
577 s->mb_skiped = 0;
578 s->decoding_error=0;
579
580 if (s->pict_type == B_TYPE) {
581 for(i=0;i<3;i++) {
582 s->current_picture[i] = s->aux_picture[i];
583 }
584 } else {
585 for(i=0;i<3;i++) {
586 /* swap next and last */
587 tmp = s->last_picture[i];
588 s->last_picture[i] = s->next_picture[i];
589 s->next_picture[i] = tmp;
590 s->current_picture[i] = tmp;
591 }
592 }
593 }
594
595 /* generic function for encode/decode called after a frame has been coded/decoded */
596 void MPV_frame_end(MpegEncContext *s)
597 {
598 // if((s->picture_number%100)==0 && s->encoding) printf("sads:%d //\n", sads);
599
600 /* draw edge for correct motion prediction if outside */
601 if (s->pict_type != B_TYPE && !s->intra_only) {
602 if(s->avctx==NULL || s->avctx->codec->id!=CODEC_ID_MPEG4 || s->divx_version>=500){
603 draw_edges(s->current_picture[0], s->linesize, s->mb_width*16, s->mb_height*16, EDGE_WIDTH);
604 draw_edges(s->current_picture[1], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
605 draw_edges(s->current_picture[2], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
606 }else{
607 /* mpeg4? / opendivx / xvid */
608 draw_edges(s->current_picture[0], s->linesize, s->width, s->height, EDGE_WIDTH);
609 draw_edges(s->current_picture[1], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
610 draw_edges(s->current_picture[2], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
611 }
612 }
613 emms_c();
614
615 if(s->pict_type!=B_TYPE){
616 s->last_non_b_pict_type= s->pict_type;
617 s->last_non_b_qscale= s->qscale;
618 s->last_non_b_mc_mb_var= s->mc_mb_var_sum;
619 s->num_available_buffers++;
620 if(s->num_available_buffers>2) s->num_available_buffers= 2;
621 }
622 }
623
624 /* reorder input for encoding */
625 void reorder_input(MpegEncContext *s, AVPicture *pict)
626 {
627 int i, j, index;
628
629 if(s->max_b_frames > FF_MAX_B_FRAMES) s->max_b_frames= FF_MAX_B_FRAMES;
630
631 // delay= s->max_b_frames+1; (or 0 if no b frames cuz decoder diff)
632
633 for(j=0; j<REORDER_BUFFER_SIZE-1; j++){
634 s->coded_order[j]= s->coded_order[j+1];
635 }
636 s->coded_order[j].picture[0]= s->coded_order[j].picture[1]= s->coded_order[j].picture[2]= NULL; //catch uninitalized buffers
637 s->coded_order[j].pict_type=0;
638
639 switch(s->input_pict_type){
640 default:
641 case I_TYPE:
642 case S_TYPE:
643 case P_TYPE:
644 index= s->max_b_frames - s->b_frames_since_non_b;
645 s->b_frames_since_non_b=0;
646 break;
647 case B_TYPE:
648 index= s->max_b_frames + 1;
649 s->b_frames_since_non_b++;
650 break;
651 }
652 //printf("index:%d type:%d strides: %d %d\n", index, s->input_pict_type, pict->linesize[0], s->linesize);
653 if( (index==0 || (s->flags&CODEC_FLAG_INPUT_PRESERVED))
654 && pict->linesize[0] == s->linesize
655 && pict->linesize[1] == s->linesize>>1
656 && pict->linesize[2] == s->linesize>>1){
657 //printf("ptr\n");
658 for(i=0; i<3; i++){
659 s->coded_order[index].picture[i]= pict->data[i];
660 }
661 }else{
662 //printf("copy\n");
663 for(i=0; i<3; i++){
664 uint8_t *src = pict->data[i];
665 uint8_t *dest;
666 int src_wrap = pict->linesize[i];
667 int dest_wrap = s->linesize;
668 int w = s->width;
669 int h = s->height;
670
671 if(index==0) dest= s->last_picture[i]+16; //is current_picture indeed but the switch hapens after reordering
672 else dest= s->picture_buffer[s->picture_buffer_index][i];
673
674 if (i >= 1) {
675 dest_wrap >>= 1;
676 w >>= 1;
677 h >>= 1;
678 }
679
680 s->coded_order[index].picture[i]= dest;
681 for(j=0;j<h;j++) {
682 memcpy(dest, src, w);
683 dest += dest_wrap;
684 src += src_wrap;
685 }
686 }
687 if(index!=0){
688 s->picture_buffer_index++;
689 if(s->picture_buffer_index >= REORDER_BUFFER_SIZE-1) s->picture_buffer_index=0;
690 }
691 }
692 s->coded_order[index].pict_type = s->input_pict_type;
693 s->coded_order[index].qscale = s->input_qscale;
694 s->coded_order[index].force_type= s->force_input_type;
695 s->coded_order[index].picture_in_gop_number= s->input_picture_in_gop_number;
696 s->coded_order[index].picture_number= s->input_picture_number;
697
698 for(i=0; i<3; i++){
699 s->new_picture[i]= s->coded_order[0].picture[i];
700 }
701 }
702
703 int MPV_encode_picture(AVCodecContext *avctx,
704 unsigned char *buf, int buf_size, void *data)
705 {
706 MpegEncContext *s = avctx->priv_data;
707 AVPicture *pict = data;
708
709 s->input_qscale = avctx->quality;
710
711 init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
712
713 if(avctx->flags&CODEC_FLAG_TYPE){
714 s->input_pict_type=
715 s->force_input_type= avctx->key_frame ? I_TYPE : P_TYPE;
716 }else if(s->flags&CODEC_FLAG_PASS2){
717 s->input_pict_type=
718 s->force_input_type= s->rc_context.entry[s->input_picture_number].new_pict_type;
719 }else{
720 s->force_input_type=0;
721 if (!s->intra_only) {
722 /* first picture of GOP is intra */
723 if (s->input_picture_in_gop_number % s->gop_size==0){
724 s->input_pict_type = I_TYPE;
725 }else if(s->max_b_frames==0){
726 s->input_pict_type = P_TYPE;
727 }else{
728 if(s->b_frames_since_non_b < s->max_b_frames) //FIXME more IQ
729 s->input_pict_type = B_TYPE;
730 else
731 s->input_pict_type = P_TYPE;
732 }
733 } else {
734 s->input_pict_type = I_TYPE;
735 }
736 }
737
738 if(s->input_pict_type==I_TYPE)
739 s->input_picture_in_gop_number=0;
740
741 reorder_input(s, pict);
742
743 /* output? */
744 if(s->coded_order[0].picture[0]){
745
746 s->pict_type= s->coded_order[0].pict_type;
747 if (s->fixed_qscale) /* the ratecontrol needs the last qscale so we dont touch it for CBR */
748 s->qscale= s->coded_order[0].qscale;
749 s->force_type= s->coded_order[0].force_type;
750 s->picture_in_gop_number= s->coded_order[0].picture_in_gop_number;
751 s->picture_number= s->coded_order[0].picture_number;
752
753 MPV_frame_start(s);
754
755 encode_picture(s, s->picture_number);
756 avctx->key_frame = (s->pict_type == I_TYPE);
757 avctx->pict_type = s->pict_type;
758 avctx->real_pict_num = s->picture_number;
759 avctx->header_bits = s->header_bits;
760 avctx->mv_bits = s->mv_bits;
761 avctx->misc_bits = s->misc_bits;
762 avctx->i_tex_bits = s->i_tex_bits;
763 avctx->p_tex_bits = s->p_tex_bits;
764 avctx->i_count = s->i_count;
765 avctx->p_count = s->p_count;
766 avctx->skip_count = s->skip_count;
767
768 MPV_frame_end(s);
769
770 if (s->out_format == FMT_MJPEG)
771 mjpeg_picture_trailer(s);
772
773 avctx->quality = s->qscale;
774
775 if(s->flags&CODEC_FLAG_PASS1)
776 ff_write_pass1_stats(s);
777
778 }
779
780 s->input_picture_number++;
781 s->input_picture_in_gop_number++;
782
783 flush_put_bits(&s->pb);
784 s->frame_bits = (pbBufPtr(&s->pb) - s->pb.buf) * 8;
785 if(s->pict_type==B_TYPE) s->pb_frame_bits+= s->frame_bits;
786 else s->pb_frame_bits= s->frame_bits;
787
788 s->total_bits += s->frame_bits;
789 avctx->frame_bits = s->frame_bits;
790 //printf("fcode: %d, type: %d, head: %d, mv: %d, misc: %d, frame: %d, itex: %d, ptex: %d\n",
791 //s->f_code, avctx->key_frame, s->header_bits, s->mv_bits, s->misc_bits, s->frame_bits, s->i_tex_bits, s->p_tex_bits);
792
793 if (avctx->get_psnr) {
794 /* At this point pict->data should have the original frame */
795 /* an s->current_picture should have the coded/decoded frame */
796 get_psnr(pict->data, s->current_picture,
797 pict->linesize, s->linesize, avctx);
798 // printf("%f\n", avctx->psnr_y);
799 }
800 return pbBufPtr(&s->pb) - s->pb.buf;
801 }
802
803 static inline void gmc1_motion(MpegEncContext *s,
804 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
805 int dest_offset,
806 UINT8 **ref_picture, int src_offset,
807 int h)
808 {
809 UINT8 *ptr;
810 int offset, src_x, src_y, linesize;
811 int motion_x, motion_y;
812
813 if(s->real_sprite_warping_points>1) printf("more than 1 warp point isnt supported\n");
814 motion_x= s->sprite_offset[0][0];
815 motion_y= s->sprite_offset[0][1];
816 src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy+1));
817 src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy+1));
818 motion_x<<=(3-s->sprite_warping_accuracy);
819 motion_y<<=(3-s->sprite_warping_accuracy);
820 src_x = clip(src_x, -16, s->width);
821 if (src_x == s->width)
822 motion_x =0;
823 src_y = clip(src_y, -16, s->height);
824 if (src_y == s->height)
825 motion_y =0;
826
827 linesize = s->linesize;
828 ptr = ref_picture[0] + (src_y * linesize) + src_x + src_offset;
829
830 dest_y+=dest_offset;
831 gmc1(dest_y , ptr , linesize, h, motion_x&15, motion_y&15, s->no_rounding);
832 gmc1(dest_y+8, ptr+8, linesize, h, motion_x&15, motion_y&15, s->no_rounding);
833
834 motion_x= s->sprite_offset[1][0];
835 motion_y= s->sprite_offset[1][1];
836 src_x = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy+1));
837 src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy+1));
838 motion_x<<=(3-s->sprite_warping_accuracy);
839 motion_y<<=(3-s->sprite_warping_accuracy);
840 src_x = clip(src_x, -8, s->width>>1);
841 if (src_x == s->width>>1)
842 motion_x =0;
843 src_y = clip(src_y, -8, s->height>>1);
844 if (src_y == s->height>>1)
845 motion_y =0;
846
847 offset = (src_y * linesize>>1) + src_x + (src_offset>>1);
848 ptr = ref_picture[1] + offset;
849 gmc1(dest_cb + (dest_offset>>1), ptr, linesize>>1, h>>1, motion_x&15, motion_y&15, s->no_rounding);
850 ptr = ref_picture[2] + offset;
851 gmc1(dest_cr + (dest_offset>>1), ptr, linesize>>1, h>>1, motion_x&15, motion_y&15, s->no_rounding);
852
853 return;
854 }
855
856 /* apply one mpeg motion vector to the three components */
857 static inline void mpeg_motion(MpegEncContext *s,
858 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
859 int dest_offset,
860 UINT8 **ref_picture, int src_offset,
861 int field_based, op_pixels_func *pix_op,
862 int motion_x, int motion_y, int h)
863 {
864 UINT8 *ptr;
865 int dxy, offset, mx, my, src_x, src_y, height, linesize;
866 if(s->quarter_sample)
867 {
868 motion_x>>=1;
869 motion_y>>=1;
870 }
871 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
872 src_x = s->mb_x * 16 + (motion_x >> 1);
873 src_y = s->mb_y * (16 >> field_based) + (motion_y >> 1);
874
875 /* WARNING: do no forget half pels */
876 height = s->height >> field_based;
877 src_x = clip(src_x, -16, s->width);
878 if (src_x == s->width)
879 dxy &= ~1;
880 src_y = clip(src_y, -16, height);
881 if (src_y == height)
882 dxy &= ~2;
883 linesize = s->linesize << field_based;
884 ptr = ref_picture[0] + (src_y * linesize) + (src_x) + src_offset;
885 dest_y += dest_offset;
886 pix_op[dxy](dest_y, ptr, linesize, h);
887 pix_op[dxy](dest_y + 8, ptr + 8, linesize, h);
888
889 if (s->out_format == FMT_H263) {
890 dxy = 0;
891 if ((motion_x & 3) != 0)
892 dxy |= 1;
893 if ((motion_y & 3) != 0)
894 dxy |= 2;
895 mx = motion_x >> 2;
896 my = motion_y >> 2;
897 } else {
898 mx = motion_x / 2;
899 my = motion_y / 2;
900 dxy = ((my & 1) << 1) | (mx & 1);
901 mx >>= 1;
902 my >>= 1;
903 }
904
905 src_x = s->mb_x * 8 + mx;
906 src_y = s->mb_y * (8 >> field_based) + my;
907 src_x = clip(src_x, -8, s->width >> 1);
908 if (src_x == (s->width >> 1))
909 dxy &= ~1;
910 src_y = clip(src_y, -8, height >> 1);
911 if (src_y == (height >> 1))
912 dxy &= ~2;
913
914 offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
915 ptr = ref_picture[1] + offset;
916 pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
917 ptr = ref_picture[2] + offset;
918 pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
919 }
920
921 static inline void qpel_motion(MpegEncContext *s,
922 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
923 int dest_offset,
924 UINT8 **ref_picture, int src_offset,
925 int field_based, op_pixels_func *pix_op,
926 qpel_mc_func *qpix_op,
927 int motion_x, int motion_y, int h)
928 {
929 UINT8 *ptr;
930 int dxy, offset, mx, my, src_x, src_y, height, linesize;
931
932 dxy = ((motion_y & 3) << 2) | (motion_x & 3);
933 src_x = s->mb_x * 16 + (motion_x >> 2);
934 src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);
935
936 height = s->height >> field_based;
937 src_x = clip(src_x, -16, s->width);
938 if (src_x == s->width)
939 dxy &= ~3;
940 src_y = clip(src_y, -16, height);
941 if (src_y == height)
942 dxy &= ~12;
943 linesize = s->linesize << field_based;
944 ptr = ref_picture[0] + (src_y * linesize) + src_x + src_offset;
945 dest_y += dest_offset;
946 //printf("%d %d %d\n", src_x, src_y, dxy);
947 qpix_op[dxy](dest_y , ptr , linesize, linesize, motion_x&3, motion_y&3);
948 qpix_op[dxy](dest_y + 8, ptr + 8, linesize, linesize, motion_x&3, motion_y&3);
949 qpix_op[dxy](dest_y + linesize*8 , ptr + linesize*8 , linesize, linesize, motion_x&3, motion_y&3);
950 qpix_op[dxy](dest_y + linesize*8 + 8, ptr + linesize*8 + 8, linesize, linesize, motion_x&3, motion_y&3);
951
952 mx= (motion_x>>1) | (motion_x&1);
953 my= (motion_y>>1) | (motion_y&1);
954
955 dxy = 0;
956 if ((mx & 3) != 0)
957 dxy |= 1;
958 if ((my & 3) != 0)
959 dxy |= 2;
960 mx = mx >> 2;
961 my = my >> 2;
962
963 src_x = s->mb_x * 8 + mx;
964 src_y = s->mb_y * (8 >> field_based) + my;
965 src_x = clip(src_x, -8, s->width >> 1);
966 if (src_x == (s->width >> 1))
967 dxy &= ~1;
968 src_y = clip(src_y, -8, height >> 1);
969 if (src_y == (height >> 1))
970 dxy &= ~2;
971
972 offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
973 ptr = ref_picture[1] + offset;
974 pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
975 ptr = ref_picture[2] + offset;
976 pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
977 }
978
979
980 static inline void MPV_motion(MpegEncContext *s,
981 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
982 int dir, UINT8 **ref_picture,
983 op_pixels_func *pix_op, qpel_mc_func *qpix_op)
984 {
985 int dxy, offset, mx, my, src_x, src_y, motion_x, motion_y;
986 int mb_x, mb_y, i;
987 UINT8 *ptr, *dest;
988
989 mb_x = s->mb_x;
990 mb_y = s->mb_y;
991
992 switch(s->mv_type) {
993 case MV_TYPE_16X16:
994 if(s->mcsel){
995 #if 0
996 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
997 ref_picture, 0,
998 0, pix_op,
999 s->sprite_offset[0][0]>>3,
1000 s->sprite_offset[0][1]>>3,
1001 16);
1002 #else
1003 gmc1_motion(s, dest_y, dest_cb, dest_cr, 0,
1004 ref_picture, 0,
1005 16);
1006 #endif
1007 }else if(s->quarter_sample && dir==0){ //FIXME
1008 qpel_motion(s, dest_y, dest_cb, dest_cr, 0,
1009 ref_picture, 0,
1010 0, pix_op, qpix_op,
1011 s->mv[dir][0][0], s->mv[dir][0][1], 16);
1012 }else{
1013 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
1014 ref_picture, 0,
1015 0, pix_op,
1016 s->mv[dir][0][0], s->mv[dir][0][1], 16);
1017 }
1018 break;
1019 case MV_TYPE_8X8:
1020 for(i=0;i<4;i++) {
1021 motion_x = s->mv[dir][i][0];
1022 motion_y = s->mv[dir][i][1];
1023
1024 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
1025 src_x = mb_x * 16 + (motion_x >> 1) + (i & 1) * 8;
1026 src_y = mb_y * 16 + (motion_y >> 1) + (i >>1) * 8;
1027
1028 /* WARNING: do no forget half pels */
1029 src_x = clip(src_x, -16, s->width);
1030 if (src_x == s->width)
1031 dxy &= ~1;
1032 src_y = clip(src_y, -16, s->height);
1033 if (src_y == s->height)
1034 dxy &= ~2;
1035
1036 ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
1037 dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
1038 pix_op[dxy](dest, ptr, s->linesize, 8);
1039 }
1040 /* In case of 8X8, we construct a single chroma motion vector
1041 with a special rounding */
1042 mx = 0;
1043 my = 0;
1044 for(i=0;i<4;i++) {
1045 mx += s->mv[dir][i][0];
1046 my += s->mv[dir][i][1];
1047 }
1048 if (mx >= 0)
1049 mx = (h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
1050 else {
1051 mx = -mx;
1052 mx = -(h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
1053 }
1054 if (my >= 0)
1055 my = (h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
1056 else {
1057 my = -my;
1058 my = -(h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
1059 }
1060 dxy = ((my & 1) << 1) | (mx & 1);
1061 mx >>= 1;
1062 my >>= 1;
1063
1064 src_x = mb_x * 8 + mx;
1065 src_y = mb_y * 8 + my;
1066 src_x = clip(src_x, -8, s->width/2);
1067 if (src_x == s->width/2)
1068 dxy &= ~1;
1069 src_y = clip(src_y, -8, s->height/2);
1070 if (src_y == s->height/2)
1071 dxy &= ~2;
1072
1073 offset = (src_y * (s->linesize >> 1)) + src_x;
1074 ptr = ref_picture[1] + offset;
1075 pix_op[dxy](dest_cb, ptr, s->linesize >> 1, 8);
1076 ptr = ref_picture[2] + offset;
1077 pix_op[dxy](dest_cr, ptr, s->linesize >> 1, 8);
1078 break;
1079 case MV_TYPE_FIELD:
1080 if (s->picture_structure == PICT_FRAME) {
1081 /* top field */
1082 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
1083 ref_picture, s->field_select[dir][0] ? s->linesize : 0,
1084 1, pix_op,
1085 s->mv[dir][0][0], s->mv[dir][0][1], 8);
1086 /* bottom field */
1087 mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
1088 ref_picture, s->field_select[dir][1] ? s->linesize : 0,
1089 1, pix_op,
1090 s->mv[dir][1][0], s->mv[dir][1][1], 8);
1091 } else {
1092
1093
1094 }
1095 break;
1096 }
1097 }
1098
1099
1100 /* put block[] to dest[] */
1101 static inline void put_dct(MpegEncContext *s,
1102 DCTELEM *block, int i, UINT8 *dest, int line_size)
1103 {
1104 if (!s->mpeg2)
1105 s->dct_unquantize(s, block, i, s->qscale);
1106 ff_idct_put (dest, line_size, block);
1107 }
1108
1109 /* add block[] to dest[] */
1110 static inline void add_dct(MpegEncContext *s,
1111 DCTELEM *block, int i, UINT8 *dest, int line_size)
1112 {
1113 /* skip dequant / idct if we are really late ;) */
1114 if(s->hurry_up>1) return;
1115
1116 if (s->block_last_index[i] >= 0) {
1117 if (!s->mpeg2)
1118 if(s->encoding || (!s->h263_msmpeg4))
1119 s->dct_unquantize(s, block, i, s->qscale);
1120
1121 ff_idct_add (dest, line_size, block);
1122 }
1123 }
1124
1125 /**
1126 * cleans dc, ac, coded_block for the current non intra MB
1127 */
1128 void ff_clean_intra_table_entries(MpegEncContext *s)
1129 {
1130 int wrap = s->block_wrap[0];
1131 int xy = s->block_index[0];
1132
1133 s->dc_val[0][xy ] =
1134 s->dc_val[0][xy + 1 ] =
1135 s->dc_val[0][xy + wrap] =
1136 s->dc_val[0][xy + 1 + wrap] = 1024;
1137 /* ac pred */
1138 memset(s->ac_val[0][xy ], 0, 32 * sizeof(INT16));
1139 memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(INT16));
1140 if (s->msmpeg4_version>=3) {
1141 s->coded_block[xy ] =
1142 s->coded_block[xy + 1 ] =
1143 s->coded_block[xy + wrap] =
1144 s->coded_block[xy + 1 + wrap] = 0;
1145 }
1146 /* chroma */
1147 wrap = s->block_wrap[4];
1148 xy = s->mb_x + 1 + (s->mb_y + 1) * wrap;
1149 s->dc_val[1][xy] =
1150 s->dc_val[2][xy] = 1024;
1151 /* ac pred */
1152 memset(s->ac_val[1][xy], 0, 16 * sizeof(INT16));
1153 memset(s->ac_val[2][xy], 0, 16 * sizeof(INT16));
1154
1155 s->mbintra_table[s->mb_x + s->mb_y*s->mb_width]= 0;
1156 }
1157
1158 /* generic function called after a macroblock has been parsed by the
1159 decoder or after it has been encoded by the encoder.
1160
1161 Important variables used:
1162 s->mb_intra : true if intra macroblock
1163 s->mv_dir : motion vector direction
1164 s->mv_type : motion vector type
1165 s->mv : motion vector
1166 s->interlaced_dct : true if interlaced dct used (mpeg2)
1167 */
1168 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
1169 {
1170 int mb_x, mb_y;
1171 int dct_linesize, dct_offset;
1172 op_pixels_func *op_pix;
1173 qpel_mc_func *op_qpix;
1174
1175 mb_x = s->mb_x;
1176 mb_y = s->mb_y;
1177
1178 #ifdef FF_POSTPROCESS
1179 /* Obsolete. Exists for compatibility with mplayer only. */
1180 quant_store[mb_y][mb_x]=s->qscale;
1181 //printf("[%02d][%02d] %d\n",mb_x,mb_y,s->qscale);
1182 #else
1183 if(s->avctx->quant_store) s->avctx->quant_store[mb_y*s->avctx->qstride+mb_x] = s->qscale;
1184 #endif
1185
1186 /* update DC predictors for P macroblocks */
1187 if (!s->mb_intra) {
1188 if (s->h263_pred || s->h263_aic) {
1189 if(s->mbintra_table[mb_x + mb_y*s->mb_width])
1190 ff_clean_intra_table_entries(s);
1191 } else {
1192 s->last_dc[0] =
1193 s->last_dc[1] =
1194 s->last_dc[2] = 128 << s->intra_dc_precision;
1195 }
1196 }
1197 else if (s->h263_pred || s->h263_aic)
1198 s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
1199
1200 /* update motion predictor, not for B-frames as they need the motion_val from the last P/S-Frame */
1201 if (s->out_format == FMT_H263) { //FIXME move into h263.c if possible, format specific stuff shouldnt be here
1202 if(s->pict_type!=B_TYPE){
1203 int xy, wrap, motion_x, motion_y;
1204
1205 wrap = 2 * s->mb_width + 2;
1206 xy = 2 * mb_x + 1 + (2 * mb_y + 1) * wrap;
1207 if (s->mb_intra) {
1208 motion_x = 0;
1209 motion_y = 0;
1210 goto motion_init;
1211 } else if (s->mv_type == MV_TYPE_16X16) {
1212 motion_x = s->mv[0][0][0];
1213 motion_y = s->mv[0][0][1];
1214 motion_init:
1215 /* no update if 8X8 because it has been done during parsing */
1216 s->motion_val[xy][0] = motion_x;
1217 s->motion_val[xy][1] = motion_y;
1218 s->motion_val[xy + 1][0] = motion_x;
1219 s->motion_val[xy + 1][1] = motion_y;
1220 s->motion_val[xy + wrap][0] = motion_x;
1221 s->motion_val[xy + wrap][1] = motion_y;
1222 s->motion_val[xy + 1 + wrap][0] = motion_x;
1223 s->motion_val[xy + 1 + wrap][1] = motion_y;
1224 }
1225 }
1226 }
1227
1228 if (!(s->encoding && (s->intra_only || s->pict_type==B_TYPE))) {
1229 UINT8 *dest_y, *dest_cb, *dest_cr;
1230 UINT8 *mbskip_ptr;
1231
1232 /* avoid copy if macroblock skipped in last frame too
1233 dont touch it for B-frames as they need the skip info from the next p-frame */
1234 if (s->pict_type != B_TYPE) {
1235 mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x];
1236 if (s->mb_skiped) {
1237 s->mb_skiped = 0;
1238 /* if previous was skipped too, then nothing to do !
1239 skip only during decoding as we might trash the buffers during encoding a bit */
1240 if (*mbskip_ptr != 0 && !s->encoding)
1241 goto the_end;
1242 *mbskip_ptr = 1; /* indicate that this time we skiped it */
1243 } else {
1244 *mbskip_ptr = 0; /* not skipped */
1245 }
1246 }
1247
1248 dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16;
1249 dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
1250 dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
1251
1252 if (s->interlaced_dct) {
1253 dct_linesize = s->linesize * 2;
1254 dct_offset = s->linesize;
1255 } else {
1256 dct_linesize = s->linesize;
1257 dct_offset = s->linesize * 8;
1258 }
1259
1260 if (!s->mb_intra) {
1261 const int xy= s->mb_y * s->mb_width + s->mb_x;
1262 /* motion handling */
1263 /* decoding or more than one mb_type (MC was allready done otherwise) */
1264 if((!s->encoding) || (s->mb_type[xy]&(s->mb_type[xy]-1))){
1265 if ((!s->no_rounding) || s->pict_type==B_TYPE){
1266 op_pix = put_pixels_tab;
1267 op_qpix= qpel_mc_rnd_tab;
1268 }else{
1269 op_pix = put_no_rnd_pixels_tab;
1270 op_qpix= qpel_mc_no_rnd_tab;
1271 }
1272
1273 if (s->mv_dir & MV_DIR_FORWARD) {
1274 MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix, op_qpix);
1275 if ((!s->no_rounding) || s->pict_type==B_TYPE)
1276 op_pix = avg_pixels_tab;
1277 else
1278 op_pix = avg_no_rnd_pixels_tab;
1279 }
1280 if (s->mv_dir & MV_DIR_BACKWARD) {
1281 MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix, op_qpix);
1282 }
1283 }
1284
1285 /* add dct residue */
1286 add_dct(s, block[0], 0, dest_y, dct_linesize);
1287 add_dct(s, block[1], 1, dest_y + 8, dct_linesize);
1288 add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
1289 add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
1290
1291 add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
1292 add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
1293 } else {
1294 /* dct only in intra block */
1295 put_dct(s, block[0], 0, dest_y, dct_linesize);
1296 put_dct(s, block[1], 1, dest_y + 8, dct_linesize);
1297 put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
1298 put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
1299
1300 put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
1301 put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
1302 }
1303 }
1304 the_end:
1305 emms_c(); //FIXME remove
1306 }
1307
1308 static inline void dct_single_coeff_elimination(MpegEncContext *s, int n, int threshold, int skip_dc)
1309 {
1310 static const char tab[64]=
1311 {3,2,2,1,1,1,1,1,
1312 1,1,1,1,1,1,1,1,
1313 1,1,1,1,1,1,1,1,
1314 0,0,0,0,0,0,0,0,
1315 0,0,0,0,0,0,0,0,
1316 0,0,0,0,0,0,0,0,
1317 0,0,0,0,0,0,0,0,
1318 0,0,0,0,0,0,0,0};
1319 int score=0;
1320 int run=0;
1321 int i;
1322 DCTELEM *block= s->block[n];
1323 const int last_index= s->block_last_index[n];
1324
1325 if(skip_dc) skip_dc=1;
1326
1327 /* are all which we could set to zero are allready zero? */
1328 if(last_index<=skip_dc - 1) return;
1329
1330 for(i=0; i<=last_index; i++){
1331 const int j = zigzag_direct[i];
1332 const int level = ABS(block[j]);
1333 if(level==1){
1334 if(skip_dc && i==0) continue;
1335 score+= tab[run];
1336 run=0;
1337 }else if(level>1){
1338 return;
1339 }else{
1340 run++;
1341 }
1342 }
1343 if(score >= threshold) return;
1344 for(i=skip_dc; i<=last_index; i++){
1345 const int j = zigzag_direct[i];
1346 block[j]=0;
1347 }
1348 if(block[0]) s->block_last_index[n]= 0;
1349 else s->block_last_index[n]= -1;
1350 }
1351
1352 static inline void clip_coeffs(MpegEncContext *s, DCTELEM *block, int last_index)
1353 {
1354 int i;
1355 const int maxlevel= s->max_qcoeff;
1356 const int minlevel= s->min_qcoeff;
1357
1358 for(i=0;i<=last_index; i++){
1359 const int j = zigzag_direct[i];
1360 int level = block[j];
1361
1362 if (level>maxlevel) level=maxlevel;
1363 else if(level<minlevel) level=minlevel;
1364 block[j]= level;
1365 }
1366 }
1367
1368 static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
1369 {
1370 const int mb_x= s->mb_x;
1371 const int mb_y= s->mb_y;
1372 int i;
1373 int skip_dct[6];
1374 #if 0
1375 if (s->interlaced_dct) {
1376 dct_linesize = s->linesize * 2;
1377 dct_offset = s->linesize;
1378 } else {
1379 dct_linesize = s->linesize;
1380 dct_offset = s->linesize * 8;
1381 }
1382 #endif
1383 for(i=0; i<6; i++) skip_dct[i]=0;
1384
1385 if (s->mb_intra) {
1386 UINT8 *ptr;
1387 int wrap;
1388
1389 wrap = s->linesize;
1390 ptr = s->new_picture[0] + (mb_y * 16 * wrap) + mb_x * 16;
1391 get_pixels(s->block[0], ptr , wrap);
1392 get_pixels(s->block[1], ptr + 8, wrap);
1393 get_pixels(s->block[2], ptr + 8 * wrap , wrap);
1394 get_pixels(s->block[3], ptr + 8 * wrap + 8, wrap);
1395
1396 wrap >>=1;
1397 ptr = s->new_picture[1] + (mb_y * 8 * wrap) + mb_x * 8;
1398 get_pixels(s->block[4], ptr, wrap);
1399
1400 ptr = s->new_picture[2] + (mb_y * 8 * wrap) + mb_x * 8;
1401 get_pixels(s->block[5], ptr, wrap);
1402 }else{
1403 op_pixels_func *op_pix;
1404 qpel_mc_func *op_qpix;
1405 UINT8 *dest_y, *dest_cb, *dest_cr;
1406 UINT8 *ptr_y, *ptr_cb, *ptr_cr;
1407 int wrap_y, wrap_c;
1408
1409 dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize ) + mb_x * 16;
1410 dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
1411 dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
1412 wrap_y = s->linesize;
1413 wrap_c = wrap_y>>1;
1414 ptr_y = s->new_picture[0] + (mb_y * 16 * wrap_y) + mb_x * 16;
1415 ptr_cb = s->new_picture[1] + (mb_y * 8 * wrap_c) + mb_x * 8;
1416 ptr_cr = s->new_picture[2] + (mb_y * 8 * wrap_c) + mb_x * 8;
1417
1418 if ((!s->no_rounding) || s->pict_type==B_TYPE){
1419 op_pix = put_pixels_tab;
1420 op_qpix= qpel_mc_rnd_tab;
1421 }else{
1422 op_pix = put_no_rnd_pixels_tab;
1423 op_qpix= qpel_mc_no_rnd_tab;
1424 }
1425
1426 if (s->mv_dir & MV_DIR_FORWARD) {
1427 MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix, op_qpix);
1428 if ((!s->no_rounding) || s->pict_type==B_TYPE)
1429 op_pix = avg_pixels_tab;
1430 else
1431 op_pix = avg_no_rnd_pixels_tab;
1432 }
1433 if (s->mv_dir & MV_DIR_BACKWARD) {
1434 MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix, op_qpix);
1435 }
1436
1437 diff_pixels(s->block[0], ptr_y , dest_y , wrap_y);
1438 diff_pixels(s->block[1], ptr_y + 8, dest_y + 8, wrap_y);
1439 diff_pixels(s->block[2], ptr_y + 8 * wrap_y , dest_y + 8 * wrap_y , wrap_y);
1440 diff_pixels(s->block[3], ptr_y + 8 * wrap_y + 8, dest_y + 8 * wrap_y + 8, wrap_y);
1441 diff_pixels(s->block[4], ptr_cb, dest_cb, wrap_c);
1442 diff_pixels(s->block[5], ptr_cr, dest_cr, wrap_c);
1443
1444 /* pre quantization */
1445 if(s->mc_mb_var[s->mb_width*mb_y+ mb_x]<2*s->qscale*s->qscale){
1446 if(pix_abs8x8(ptr_y , dest_y , wrap_y) < 20*s->qscale) skip_dct[0]= 1;
1447 if(pix_abs8x8(ptr_y + 8, dest_y + 8, wrap_y) < 20*s->qscale) skip_dct[1]= 1;
1448 if(pix_abs8x8(ptr_y + 8*wrap_y , dest_y + 8*wrap_y , wrap_y) < 20*s->qscale) skip_dct[2]= 1;
1449 if(pix_abs8x8(ptr_y + 8*wrap_y + 8, dest_y + 8*wrap_y + 8, wrap_y) < 20*s->qscale) skip_dct[3]= 1;
1450 if(pix_abs8x8(ptr_cb , dest_cb , wrap_y) < 20*s->qscale) skip_dct[4]= 1;
1451 if(pix_abs8x8(ptr_cr , dest_cr , wrap_y) < 20*s->qscale) skip_dct[5]= 1;
1452 #if 0
1453 {
1454 static int stat[7];
1455 int num=0;
1456 for(i=0; i<6; i++)
1457 if(skip_dct[i]) num++;
1458 stat[num]++;
1459
1460 if(s->mb_x==0 && s->mb_y==0){
1461 for(i=0; i<7; i++){
1462 printf("%6d %1d\n", stat[i], i);
1463 }
1464 }
1465 }
1466 #endif
1467 }
1468
1469 }
1470
1471 #if 0
1472 {
1473 float adap_parm;
1474
1475 adap_parm = ((s->avg_mb_var << 1) + s->mb_var[s->mb_width*mb_y+mb_x] + 1.0) /
1476 ((s->mb_var[s->mb_width*mb_y+mb_x] << 1) + s->avg_mb_var + 1.0);
1477
1478 printf("\ntype=%c qscale=%2d adap=%0.2f dquant=%4.2f var=%4d avgvar=%4d",
1479 (s->mb_type[s->mb_width*mb_y+mb_x] > 0) ? 'I' : 'P',
1480 s->qscale, adap_parm, s->qscale*adap_parm,
1481 s->mb_var[s->mb_width*mb_y+mb_x], s->avg_mb_var);
1482 }
1483 #endif
1484 /* DCT & quantize */
1485 if (s->h263_pred && !(s->msmpeg4_version==1 || s->msmpeg4_version==2)) {
1486 h263_dc_scale(s);
1487 } else if (s->h263_aic) {
1488 s->y_dc_scale = 2*s->qscale;
1489 s->c_dc_scale = 2*s->qscale;
1490 } else {
1491 /* default quantization values */
1492 s->y_dc_scale = 8;
1493 s->c_dc_scale = 8;
1494 }
1495 if(s->out_format==FMT_MJPEG){
1496 for(i=0;i<6;i++) {
1497 int overflow;
1498 s->block_last_index[i] = dct_quantize(s, s->block[i], i, 8, &overflow);
1499 if (overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
1500 }
1501 }else{
1502 for(i=0;i<6;i++) {
1503 if(!skip_dct[i]){
1504 int overflow;
1505 s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale, &overflow);
1506 // FIXME we could decide to change to quantizer instead of clipping
1507 // JS: I don't think that would be a good idea it could lower quality instead
1508 // of improve it. Just INTRADC clipping deserves changes in quantizer
1509 if (overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
1510 }else
1511 s->block_last_index[i]= -1;
1512 }
1513 if(s->luma_elim_threshold && !s->mb_intra)
1514 for(i=0; i<4; i++)
1515 dct_single_coeff_elimination(s, i, s->luma_elim_threshold, 0);
1516 if(s->chroma_elim_threshold && !s->mb_intra)
1517 for(i=4; i<6; i++)
1518 dct_single_coeff_elimination(s, i, s->chroma_elim_threshold, 1);
1519 }
1520
1521 /* huffman encode */
1522 switch(s->out_format) {
1523 case FMT_MPEG1:
1524 mpeg1_encode_mb(s, s->block, motion_x, motion_y);
1525 break;
1526 case FMT_H263:
1527 if (s->h263_msmpeg4)
1528 msmpeg4_encode_mb(s, s->block, motion_x, motion_y);
1529 else if(s->h263_pred)
1530 mpeg4_encode_mb(s, s->block, motion_x, motion_y);
1531 else
1532 h263_encode_mb(s, s->block, motion_x, motion_y);
1533 break;
1534 case FMT_MJPEG:
1535 mjpeg_encode_mb(s, s->block);
1536 break;
1537 }
1538 }
1539
1540 void ff_copy_bits(PutBitContext *pb, UINT8 *src, int length)
1541 {
1542 #if 1
1543 int bytes= length>>4;
1544 int bits= length&15;
1545 int i;
1546
1547 if(length==0) return;
1548
1549 for(i=0; i<bytes; i++) put_bits(pb, 16, be2me_16(((uint16_t*)src)[i]));
1550 put_bits(pb, bits, be2me_16(((uint16_t*)src)[i])>>(16-bits));
1551 #else
1552 int bytes= length>>3;
1553 int bits= length&7;
1554 int i;
1555
1556 for(i=0; i<bytes; i++) put_bits(pb, 8, src[i]);
1557 put_bits(pb, bits, src[i]>>(8-bits));
1558 #endif
1559 }
1560
1561 static inline void copy_context_before_encode(MpegEncContext *d, MpegEncContext *s, int type){
1562 int i;
1563
1564 memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster then a loop?
1565
1566 /* mpeg1 */
1567 d->mb_incr= s->mb_incr;
1568 for(i=0; i<3; i++)
1569 d->last_dc[i]= s->last_dc[i];
1570
1571 /* statistics */
1572 d->mv_bits= s->mv_bits;
1573 d->i_tex_bits= s->i_tex_bits;
1574 d->p_tex_bits= s->p_tex_bits;
1575 d->i_count= s->i_count;
1576 d->p_count= s->p_count;
1577 d->skip_count= s->skip_count;
1578 d->misc_bits= s->misc_bits;
1579 d->last_bits= 0;
1580
1581 d->mb_skiped= s->mb_skiped;
1582 }
1583
1584 static inline void copy_context_after_encode(MpegEncContext *d, MpegEncContext *s, int type){
1585 int i;
1586
1587 memcpy(d->mv, s->mv, 2*4*2*sizeof(int));
1588 memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster then a loop?
1589
1590 /* mpeg1 */
1591 d->mb_incr= s->mb_incr;
1592 for(i=0; i<3; i++)
1593 d->last_dc[i]= s->last_dc[i];
1594
1595 /* statistics */
1596 d->mv_bits= s->mv_bits;
1597 d->i_tex_bits= s->i_tex_bits;
1598 d->p_tex_bits= s->p_tex_bits;
1599 d->i_count= s->i_count;
1600 d->p_count= s->p_count;
1601 d->skip_count= s->skip_count;
1602 d->misc_bits= s->misc_bits;
1603
1604 d->mb_intra= s->mb_intra;
1605 d->mb_skiped= s->mb_skiped;
1606 d->mv_type= s->mv_type;
1607 d->mv_dir= s->mv_dir;
1608 d->pb= s->pb;
1609 if(s->data_partitioning){
1610 d->pb2= s->pb2;
1611 d->tex_pb= s->tex_pb;
1612 }
1613 d->block= s->block;
1614 for(i=0; i<6; i++)
1615 d->block_last_index[i]= s->block_last_index[i];
1616 }
1617
1618 static inline void encode_mb_hq(MpegEncContext *s, MpegEncContext *backup, MpegEncContext *best, int type,
1619 PutBitContext pb[2], PutBitContext pb2[2], PutBitContext tex_pb[2],
1620 int *dmin, int *next_block, int motion_x, int motion_y)
1621 {
1622 int bits_count;
1623
1624 copy_context_before_encode(s, backup, type);
1625
1626 s->block= s->blocks[*next_block];
1627 s->pb= pb[*next_block];
1628 if(s->data_partitioning){
1629 s->pb2 = pb2 [*next_block];
1630 s->tex_pb= tex_pb[*next_block];
1631 }
1632
1633 encode_mb(s, motion_x, motion_y);
1634
1635 bits_count= get_bit_count(&s->pb);
1636 if(s->data_partitioning){
1637 bits_count+= get_bit_count(&s->pb2);
1638 bits_count+= get_bit_count(&s->tex_pb);
1639 }
1640
1641 if(bits_count<*dmin){
1642 *dmin= bits_count;
1643 *next_block^=1;
1644
1645 copy_context_after_encode(best, s, type);
1646 }
1647 }
1648
1649 static void encode_picture(MpegEncContext *s, int picture_number)
1650 {
1651 int mb_x, mb_y, last_gob, pdif = 0;
1652 int i;
1653 int bits;
1654 MpegEncContext best_s, backup_s;
1655 UINT8 bit_buf[2][3000];
1656 UINT8 bit_buf2[2][3000];
1657 UINT8 bit_buf_tex[2][3000];
1658 PutBitContext pb[2], pb2[2], tex_pb[2];
1659
1660 for(i=0; i<2; i++){
1661 init_put_bits(&pb [i], bit_buf [i], 3000, NULL, NULL);
1662 init_put_bits(&pb2 [i], bit_buf2 [i], 3000, NULL, NULL);
1663 init_put_bits(&tex_pb[i], bit_buf_tex[i], 3000, NULL, NULL);
1664 }
1665
1666 s->picture_number = picture_number;
1667
1668 s->block_wrap[0]=
1669 s->block_wrap[1]=
1670 s->block_wrap[2]=
1671 s->block_wrap[3]= s->mb_width*2 + 2;
1672 s->block_wrap[4]=
1673 s->block_wrap[5]= s->mb_width + 2;
1674
1675 /* Reset the average MB variance */
1676 s->mb_var_sum = 0;
1677 s->mc_mb_var_sum = 0;
1678
1679 /* we need to initialize some time vars before we can encode b-frames */
1680 if (s->h263_pred && !s->h263_msmpeg4)
1681 ff_set_mpeg4_time(s, s->picture_number);
1682
1683 /* Estimate motion for every MB */
1684 if(s->pict_type != I_TYPE){
1685 for(mb_y=0; mb_y < s->mb_height; mb_y++) {
1686 s->block_index[0]= s->block_wrap[0]*(mb_y*2 + 1) - 1;
1687 s->block_index[1]= s->block_wrap[0]*(mb_y*2 + 1);
1688 s->block_index[2]= s->block_wrap[0]*(mb_y*2 + 2) - 1;
1689 s->block_index[3]= s->block_wrap[0]*(mb_y*2 + 2);
1690 for(mb_x=0; mb_x < s->mb_width; mb_x++) {
1691 s->mb_x = mb_x;
1692 s->mb_y = mb_y;
1693 s->block_index[0]+=2;
1694 s->block_index[1]+=2;
1695 s->block_index[2]+=2;
1696 s->block_index[3]+=2;
1697
1698 /* compute motion vector & mb_type and store in context */
1699 if(s->pict_type==B_TYPE)
1700 ff_estimate_b_frame_motion(s, mb_x, mb_y);
1701 else
1702 ff_estimate_p_frame_motion(s, mb_x, mb_y);
1703 // s->mb_type[mb_y*s->mb_width + mb_x]=MB_TYPE_INTER;
1704 }
1705 }
1706 emms_c();
1707 }else /* if(s->pict_type == I_TYPE) */{
1708 /* I-Frame */
1709 //FIXME do we need to zero them?
1710 memset(s->motion_val[0], 0, sizeof(INT16)*(s->mb_width*2 + 2)*(s->mb_height*2 + 2)*2);
1711 memset(s->p_mv_table , 0, sizeof(INT16)*(s->mb_width+2)*(s->mb_height+2)*2);
1712 memset(s->mb_type , MB_TYPE_INTRA, sizeof(UINT8)*s->mb_width*s->mb_height);
1713 }
1714
1715 if(s->mb_var_sum < s->mc_mb_var_sum && s->pict_type == P_TYPE){ //FIXME subtract MV bits
1716 s->pict_type= I_TYPE;
1717 memset(s->mb_type , MB_TYPE_INTRA, sizeof(UINT8)*s->mb_width*s->mb_height);
1718 if(s->max_b_frames==0){
1719 s->input_pict_type= I_TYPE;
1720 s->input_picture_in_gop_number=0;
1721 }
1722 //printf("Scene change detected, encoding as I Frame\n");
1723 }
1724
1725 if(s->pict_type==P_TYPE || s->pict_type==S_TYPE)
1726 s->f_code= ff_get_best_fcode(s, s->p_mv_table, MB_TYPE_INTER);
1727 ff_fix_long_p_mvs(s);
1728 if(s->pict_type==B_TYPE){
1729 s->f_code= ff_get_best_fcode(s, s->b_forw_mv_table, MB_TYPE_FORWARD);
1730 s->b_code= ff_get_best_fcode(s, s->b_back_mv_table, MB_TYPE_BACKWARD);
1731
1732 ff_fix_long_b_mvs(s, s->b_forw_mv_table, s->f_code, MB_TYPE_FORWARD);
1733 ff_fix_long_b_mvs(s, s->b_back_mv_table, s->b_code, MB_TYPE_BACKWARD);
1734 ff_fix_long_b_mvs(s, s->b_bidir_forw_mv_table, s->f_code, MB_TYPE_BIDIR);
1735 ff_fix_long_b_mvs(s, s->b_bidir_back_mv_table, s->b_code, MB_TYPE_BIDIR);
1736 }
1737
1738 //printf("f_code %d ///\n", s->f_code);
1739
1740 // printf("%d %d\n", s->avg_mb_var, s->mc_mb_var);
1741
1742 if(s->flags&CODEC_FLAG_PASS2)
1743 s->qscale = ff_rate_estimate_qscale_pass2(s);
1744 else if (!s->fixed_qscale)
1745 s->qscale = ff_rate_estimate_qscale(s);
1746
1747 if (s->out_format == FMT_MJPEG) {
1748 /* for mjpeg, we do include qscale in the matrix */
1749 s->intra_matrix[0] = default_intra_matrix[0];
1750 for(i=1;i<64;i++)
1751 s->intra_matrix[i] = CLAMP_TO_8BIT((default_intra_matrix[i] * s->qscale) >> 3);
1752 convert_matrix(s->q_intra_matrix, s->q_intra_matrix16,
1753 s->q_intra_matrix16_bias, s->intra_matrix, s->intra_quant_bias);
1754 }
1755
1756 s->last_bits= get_bit_count(&s->pb);
1757 switch(s->out_format) {
1758 case FMT_MJPEG:
1759 mjpeg_picture_header(s);
1760 break;
1761 case FMT_H263:
1762 if (s->h263_msmpeg4)
1763 msmpeg4_encode_picture_header(s, picture_number);
1764 else if (s->h263_pred)
1765 mpeg4_encode_picture_header(s, picture_number);
1766 else if (s->h263_rv10)
1767 rv10_encode_picture_header(s, picture_number);
1768 else
1769 h263_encode_picture_header(s, picture_number);
1770 break;
1771 case FMT_MPEG1:
1772 mpeg1_encode_picture_header(s, picture_number);
1773 break;
1774 }
1775 bits= get_bit_count(&s->pb);
1776 s->header_bits= bits - s->last_bits;
1777 s->last_bits= bits;
1778 s->mv_bits=0;
1779 s->misc_bits=0;
1780 s->i_tex_bits=0;
1781 s->p_tex_bits=0;
1782 s->i_count=0;
1783 s->p_count=0;
1784 s->skip_count=0;
1785
1786 /* init last dc values */
1787 /* note: quant matrix value (8) is implied here */
1788 s->last_dc[0] = 128;
1789 s->last_dc[1] = 128;
1790 s->last_dc[2] = 128;
1791 s->mb_incr = 1;
1792 s->last_mv[0][0][0] = 0;
1793 s->last_mv[0][0][1] = 0;
1794
1795 /* Get the GOB height based on picture height */
1796 if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4) {
1797 if (s->height <= 400)
1798 s->gob_index = 1;
1799 else if (s->height <= 800)
1800 s->gob_index = 2;
1801 else
1802 s->gob_index = 4;
1803 }else if(s->codec_id==CODEC_ID_MPEG4){
1804 s->gob_index = 1;
1805 }
1806
1807 if(s->codec_id==CODEC_ID_MPEG4 && s->data_partitioning && s->pict_type!=B_TYPE)
1808 ff_mpeg4_init_partitions(s);
1809
1810 s->resync_mb_x=0;
1811 s->resync_mb_y=0;
1812 for(mb_y=0; mb_y < s->mb_height; mb_y++) {
1813 /* Put GOB header based on RTP MTU for formats which support it per line (H263*)*/
1814 /* TODO: Put all this stuff in a separate generic function */
1815 if (s->rtp_mode) {
1816 if (!mb_y) {
1817 s->ptr_lastgob = s->pb.buf;
1818 s->ptr_last_mb_line = s->pb.buf;
1819 } else if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4 && !(mb_y % s->gob_index)) {
1820 // MN: we could move the space check from h263 -> here, as its not h263 specific
1821 last_gob = h263_encode_gob_header(s, mb_y);
1822 if (last_gob) {
1823 s->first_slice_line = 1;
1824 }else{
1825 /*MN: we reset it here instead at the end of each line cuz mpeg4 can have
1826 slice lines starting & ending in the middle*/
1827 s->first_slice_line = 0;
1828 }
1829 }
1830 }
1831
1832 s->block_index[0]= s->block_wrap[0]*(mb_y*2 + 1) - 1;
1833 s->block_index[1]= s->block_wrap[0]*(mb_y*2 + 1);
1834 s->block_index[2]= s->block_wrap[0]*(mb_y*2 + 2) - 1;
1835 s->block_index[3]= s->block_wrap[0]*(mb_y*2 + 2);
1836 s->block_index[4]= s->block_wrap[4]*(mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2);
1837 s->block_index[5]= s->block_wrap[4]*(mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
1838 for(mb_x=0; mb_x < s->mb_width; mb_x++) {
1839 const int mb_type= s->mb_type[mb_y * s->mb_width + mb_x];
1840 const int xy= (mb_y+1) * (s->mb_width+2) + mb_x + 1;
1841 // int d;
1842 int dmin=10000000;
1843
1844 s->mb_x = mb_x;
1845 s->mb_y = mb_y;
1846 s->block_index[0]+=2;
1847 s->block_index[1]+=2;
1848 s->block_index[2]+=2;
1849 s->block_index[3]+=2;
1850 s->block_index[4]++;
1851 s->block_index[5]++;
1852
1853 /* write gob / video packet header for formats which support it at any MB (MPEG4) */
1854 if(s->rtp_mode && s->mb_y>0 && s->codec_id==CODEC_ID_MPEG4){
1855 int pdif= pbBufPtr(&s->pb) - s->ptr_lastgob;
1856
1857 //the *2 is there so we stay below the requested size
1858 if(pdif + s->mb_line_avgsize/s->mb_width >= s->rtp_payload_size){
1859 if(s->codec_id==CODEC_ID_MPEG4){
1860 if(s->data_partitioning && s->pict_type!=B_TYPE){
1861 ff_mpeg4_merge_partitions(s);
1862 ff_mpeg4_init_partitions(s);
1863 }
1864 ff_mpeg4_encode_video_packet_header(s);
1865
1866 if(s->flags&CODEC_FLAG_PASS1){
1867 int bits= get_bit_count(&s->pb);
1868 s->misc_bits+= bits - s->last_bits;
1869 s->last_bits= bits;
1870 }
1871 ff_mpeg4_clean_buffers(s);
1872 }
1873 s->ptr_lastgob = pbBufPtr(&s->pb);
1874 s->first_slice_line=1;
1875 s->resync_mb_x=mb_x;
1876 s->resync_mb_y=mb_y;
1877 }
1878
1879 if( (s->resync_mb_x == s->mb_x)
1880 && s->resync_mb_y+1 == s->mb_y){
1881 s->first_slice_line=0;
1882 }
1883 }
1884
1885 if(mb_type & (mb_type-1)){ // more than 1 MB type possible
1886 int next_block=0;
1887 int pb_bits_count, pb2_bits_count, tex_pb_bits_count;
1888
1889 copy_context_before_encode(&backup_s, s, -1);
1890 backup_s.pb= s->pb;
1891 best_s.data_partitioning= s->data_partitioning;
1892 if(s->data_partitioning){
1893 backup_s.pb2= s->pb2;
1894 backup_s.tex_pb= s->tex_pb;
1895 }
1896
1897 if(mb_type&MB_TYPE_INTER){
1898 s->mv_dir = MV_DIR_FORWARD;
1899 s->mv_type = MV_TYPE_16X16;
1900 s->mb_intra= 0;
1901 s->mv[0][0][0] = s->p_mv_table[xy][0];
1902 s->mv[0][0][1] = s->p_mv_table[xy][1];
1903 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_INTER, pb, pb2, tex_pb,
1904 &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
1905 }
1906 if(mb_type&MB_TYPE_INTER4V){
1907 s->mv_dir = MV_DIR_FORWARD;
1908 s->mv_type = MV_TYPE_8X8;
1909 s->mb_intra= 0;
1910 for(i=0; i<4; i++){
1911 s->mv[0][i][0] = s->motion_val[s->block_index[i]][0];
1912 s->mv[0][i][1] = s->motion_val[s->block_index[i]][1];
1913 }
1914 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_INTER4V, pb, pb2, tex_pb,
1915 &dmin, &next_block, 0, 0);
1916 }
1917 if(mb_type&MB_TYPE_FORWARD){
1918 s->mv_dir = MV_DIR_FORWARD;
1919 s->mv_type = MV_TYPE_16X16;
1920 s->mb_intra= 0;
1921 s->mv[0][0][0] = s->b_forw_mv_table[xy][0];
1922 s->mv[0][0][1] = s->b_forw_mv_table[xy][1];
1923 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_FORWARD, pb, pb2, tex_pb,
1924 &dmin, &next_block, s->mv[0][0][0], s->mv[0][0][1]);
1925 }
1926 if(mb_type&MB_TYPE_BACKWARD){
1927 s->mv_dir = MV_DIR_BACKWARD;
1928 s->mv_type = MV_TYPE_16X16;
1929 s->mb_intra= 0;
1930 s->mv[1][0][0] = s->b_back_mv_table[xy][0];
1931 s->mv[1][0][1] = s->b_back_mv_table[xy][1];
1932 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_BACKWARD, pb, pb2, tex_pb,
1933 &dmin, &next_block, s->mv[1][0][0], s->mv[1][0][1]);
1934 }
1935 if(mb_type&MB_TYPE_BIDIR){
1936 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1937 s->mv_type = MV_TYPE_16X16;
1938 s->mb_intra= 0;
1939 s->mv[0][0][0] = s->b_bidir_forw_mv_table[xy][0];
1940 s->mv[0][0][1] = s->b_bidir_forw_mv_table[xy][1];
1941 s->mv[1][0][0] = s->b_bidir_back_mv_table[xy][0];
1942 s->mv[1][0][1] = s->b_bidir_back_mv_table[xy][1];
1943 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_BIDIR, pb, pb2, tex_pb,
1944 &dmin, &next_block, 0, 0);
1945 }
1946 if(mb_type&MB_TYPE_DIRECT){
1947 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
1948 s->mv_type = MV_TYPE_16X16; //FIXME
1949 s->mb_intra= 0;
1950 s->mv[0][0][0] = s->b_direct_forw_mv_table[xy][0];
1951 s->mv[0][0][1] = s->b_direct_forw_mv_table[xy][1];
1952 s->mv[1][0][0] = s->b_direct_back_mv_table[xy][0];
1953 s->mv[1][0][1] = s->b_direct_back_mv_table[xy][1];
1954 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_DIRECT, pb, pb2, tex_pb,
1955 &dmin, &next_block, s->b_direct_mv_table[xy][0], s->b_direct_mv_table[xy][1]);
1956 }
1957 if(mb_type&MB_TYPE_INTRA){
1958 s->mv_dir = MV_DIR_FORWARD;
1959 s->mv_type = MV_TYPE_16X16;
1960 s->mb_intra= 1;
1961 s->mv[0][0][0] = 0;
1962 s->mv[0][0][1] = 0;
1963 encode_mb_hq(s, &backup_s, &best_s, MB_TYPE_INTRA, pb, pb2, tex_pb,
1964 &dmin, &next_block, 0, 0);
1965 /* force cleaning of ac/dc pred stuff if needed ... */
1966 if(s->h263_pred || s->h263_aic)
1967 s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
1968 }
1969 copy_context_after_encode(s, &best_s, -1);
1970
1971 pb_bits_count= get_bit_count(&s->pb);
1972 flush_put_bits(&s->pb);
1973 ff_copy_bits(&backup_s.pb, bit_buf[next_block^1], pb_bits_count);
1974 s->pb= backup_s.pb;
1975
1976 if(s->data_partitioning){
1977 pb2_bits_count= get_bit_count(&s->pb2);
1978 flush_put_bits(&s->pb2);
1979 ff_copy_bits(&backup_s.pb2, bit_buf2[next_block^1], pb2_bits_count);
1980 s->pb2= backup_s.pb2;
1981
1982 tex_pb_bits_count= get_bit_count(&s->tex_pb);
1983 flush_put_bits(&s->tex_pb);
1984 ff_copy_bits(&backup_s.tex_pb, bit_buf_tex[next_block^1], tex_pb_bits_count);
1985 s->tex_pb= backup_s.tex_pb;
1986 }
1987 s->last_bits= get_bit_count(&s->pb);
1988 } else {
1989 int motion_x, motion_y;
1990 s->mv_type=MV_TYPE_16X16;
1991 // only one MB-Type possible
1992 switch(mb_type){
1993 case MB_TYPE_INTRA:
1994 s->mv_dir = MV_DIR_FORWARD;
1995 s->mb_intra= 1;
1996 motion_x= s->mv[0][0][0] = 0;
1997 motion_y= s->mv[0][0][1] = 0;
1998 break;
1999 case MB_TYPE_INTER:
2000 s->mv_dir = MV_DIR_FORWARD;
2001 s->mb_intra= 0;
2002 motion_x= s->mv[0][0][0] = s->p_mv_table[xy][0];
2003 motion_y= s->mv[0][0][1] = s->p_mv_table[xy][1];
2004 break;
2005 case MB_TYPE_INTER4V:
2006 s->mv_dir = MV_DIR_FORWARD;
2007 s->mv_type = MV_TYPE_8X8;
2008 s->mb_intra= 0;
2009 for(i=0; i<4; i++){
2010 s->mv[0][i][0] = s->motion_val[s->block_index[i]][0];
2011 s->mv[0][i][1] = s->motion_val[s->block_index[i]][1];
2012 }
2013 motion_x= motion_y= 0;
2014 break;
2015 case MB_TYPE_DIRECT:
2016 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
2017 s->mb_intra= 0;
2018 motion_x=s->b_direct_mv_table[xy][0];
2019 motion_y=s->b_direct_mv_table[xy][1];
2020 s->mv[0][0][0] = s->b_direct_forw_mv_table[xy][0];
2021 s->mv[0][0][1] = s->b_direct_forw_mv_table[xy][1];
2022 s->mv[1][0][0] = s->b_direct_back_mv_table[xy][0];
2023 s->mv[1][0][1] = s->b_direct_back_mv_table[xy][1];
2024 break;
2025 case MB_TYPE_BIDIR:
2026 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
2027 s->mb_intra= 0;
2028 motion_x=0;
2029 motion_y=0;
2030 s->mv[0][0][0] = s->b_bidir_forw_mv_table[xy][0];
2031 s->mv[0][0][1] = s->b_bidir_forw_mv_table[xy][1];
2032 s->mv[1][0][0] = s->b_bidir_back_mv_table[xy][0];
2033 s->mv[1][0][1] = s->b_bidir_back_mv_table[xy][1];
2034 break;
2035 case MB_TYPE_BACKWARD:
2036 s->mv_dir = MV_DIR_BACKWARD;
2037 s->mb_intra= 0;
2038 motion_x= s->mv[1][0][0] = s->b_back_mv_table[xy][0];
2039 motion_y= s->mv[1][0][1] = s->b_back_mv_table[xy][1];
2040 break;
2041 case MB_TYPE_FORWARD:
2042 s->mv_dir = MV_DIR_FORWARD;
2043 s->mb_intra= 0;
2044 motion_x= s->mv[0][0][0] = s->b_forw_mv_table[xy][0];
2045 motion_y= s->mv[0][0][1] = s->b_forw_mv_table[xy][1];
2046 // printf(" %d %d ", motion_x, motion_y);
2047 break;
2048 default:
2049 motion_x=motion_y=0; //gcc warning fix
2050 printf("illegal MB type\n");
2051 }
2052 encode_mb(s, motion_x, motion_y);
2053 }
2054 /* clean the MV table in IPS frames for direct mode in B frames */
2055 if(s->mb_intra /* && I,P,S_TYPE */){
2056 s->p_mv_table[xy][0]=0;
2057 s->p_mv_table[xy][1]=0;
2058 }
2059
2060 MPV_decode_mb(s, s->block);
2061 //printf("MB %d %d bits\n", s->mb_x+s->mb_y*s->mb_width, get_bit_count(&s->pb));
2062 }
2063
2064
2065 /* Obtain average GOB size for RTP */
2066 if (s->rtp_mode) {
2067 if (!mb_y)
2068 s->mb_line_avgsize = pbBufPtr(&s->pb) - s->ptr_last_mb_line;
2069 else if (!(mb_y % s->gob_index)) {
2070 s->mb_line_avgsize = (s->mb_line_avgsize + pbBufPtr(&s->pb) - s->ptr_last_mb_line) >> 1;
2071 s->ptr_last_mb_line = pbBufPtr(&s->pb);
2072 }
2073 //fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y,
2074 // (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
2075 if(s->codec_id!=CODEC_ID_MPEG4) s->first_slice_line = 0; //FIXME clean
2076 }
2077 }
2078 emms_c();
2079
2080 if(s->codec_id==CODEC_ID_MPEG4 && s->data_partitioning && s->pict_type!=B_TYPE)
2081 ff_mpeg4_merge_partitions(s);
2082
2083 if (s->msmpeg4_version && s->msmpeg4_version<4 && s->pict_type == I_TYPE)
2084 msmpeg4_encode_ext_header(s);
2085
2086 if(s->codec_id==CODEC_ID_MPEG4)
2087 ff_mpeg4_stuffing(&s->pb);
2088
2089 //if (s->gob_number)
2090 // fprintf(stderr,"\nNumber of GOB: %d", s->gob_number);
2091
2092 /* Send the last GOB if RTP */
2093 if (s->rtp_mode) {
2094 flush_put_bits(&s->pb);
2095 pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
2096 /* Call the RTP callback to send the last GOB */
2097 if (s->rtp_callback)
2098 s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
2099 s->ptr_lastgob = pbBufPtr(&s->pb);
2100 //fprintf(stderr,"\nGOB: %2d size: %d (last)", s->gob_number, pdif);
2101 }
2102 }
2103
2104 static int dct_quantize_c(MpegEncContext *s,
2105 DCTELEM *block, int n,
2106 int qscale, int *overflow)
2107 {
2108 int i, j, level, last_non_zero, q;
2109 const int *qmat;
2110 int bias;
2111 int max=0;
2112 unsigned int threshold1, threshold2;
2113
2114 av_fdct (block);
2115
2116 /* we need this permutation so that we correct the IDCT
2117 permutation. will be moved into DCT code */
2118 block_permute(block);
2119
2120 if (s->mb_intra) {
2121 if (!s->h263_aic) {
2122 if (n < 4)
2123 q = s->y_dc_scale;
2124 else
2125 q = s->c_dc_scale;
2126 q = q << 3;
2127 } else
2128 /* For AIC we skip quant/dequant of INTRADC */
2129 q = 1 << 3;
2130
2131 /* note: block[0] is assumed to be positive */
2132 block[0] = (block[0] + (q >> 1)) / q;
2133 i = 1;
2134 last_non_zero = 0;
2135 qmat = s->q_intra_matrix[qscale];
2136 bias= s->intra_quant_bias<<(QMAT_SHIFT - 3 - QUANT_BIAS_SHIFT);
2137 } else {
2138 i = 0;
2139 last_non_zero = -1;
2140 qmat = s->q_inter_matrix[qscale];
2141 bias= s->inter_quant_bias<<(QMAT_SHIFT - 3 - QUANT_BIAS_SHIFT);
2142 }
2143 threshold1= (1<<(QMAT_SHIFT - 3)) - bias - 1;
2144 threshold2= threshold1<<1;
2145
2146 for(;i<64;i++) {
2147 j = zigzag_direct[i];
2148 level = block[j];
2149 level = level * qmat[j];
2150
2151 // if( bias+level >= (1<<(QMAT_SHIFT - 3))
2152 // || bias-level >= (1<<(QMAT_SHIFT - 3))){
2153 if(((unsigned)(level+threshold1))>threshold2){
2154 if(level>0){
2155 level= (bias + level)>>(QMAT_SHIFT - 3);
2156 block[j]= level;
2157 }else{
2158 level= (bias - level)>>(QMAT_SHIFT - 3);
2159 block[j]= -level;
2160 }
2161 max |=level;
2162 last_non_zero = i;
2163 }else{
2164 block[j]=0;
2165 }
2166 }
2167 *overflow= s->max_qcoeff < max; //overflow might have happend
2168
2169 return last_non_zero;
2170 }
2171
2172 static void dct_unquantize_mpeg1_c(MpegEncContext *s,
2173 DCTELEM *block, int n, int qscale)
2174 {
2175 int i, level, nCoeffs;
2176 const UINT16 *quant_matrix;
2177
2178 if(s->alternate_scan) nCoeffs= 64;
2179 else nCoeffs= s->block_last_index[n]+1;
2180
2181 if (s->mb_intra) {
2182 if (n < 4)
2183 block[0] = block[0] * s->y_dc_scale;
2184 else
2185 block[0] = block[0] * s->c_dc_scale;
2186 /* XXX: only mpeg1 */
2187 quant_matrix = s->intra_matrix;
2188 for(i=1;i<nCoeffs;i++) {
2189 int j= zigzag_direct[i];
2190 level = block[j];
2191 if (level) {
2192 if (level < 0) {
2193 level = -level;
2194 level = (int)(level * qscale * quant_matrix[j]) >> 3;
2195 level = (level - 1) | 1;
2196 level = -level;
2197 } else {
2198 level = (int)(level * qscale * quant_matrix[j]) >> 3;
2199 level = (level - 1) | 1;
2200 }
2201 #ifdef PARANOID
2202 if (level < -2048 || level > 2047)
2203 fprintf(stderr, "unquant error %d %d\n", i, level);
2204 #endif
2205 block[j] = level;
2206 }
2207 }
2208 } else {
2209 i = 0;
2210 quant_matrix = s->inter_matrix;
2211 for(;i<nCoeffs;i++) {
2212 int j= zigzag_direct[i];
2213 level = block[j];
2214 if (level) {
2215 if (level < 0) {
2216 level = -level;
2217 level = (((level << 1) + 1) * qscale *
2218 ((int) (quant_matrix[j]))) >> 4;
2219 level = (level - 1) | 1;
2220 level = -level;
2221 } else {
2222 level = (((level << 1) + 1) * qscale *
2223 ((int) (quant_matrix[j]))) >> 4;
2224 level = (level - 1) | 1;
2225 }
2226 #ifdef PARANOID
2227 if (level < -2048 || level > 2047)
2228 fprintf(stderr, "unquant error %d %d\n", i, level);
2229 #endif
2230 block[j] = level;
2231 }
2232 }
2233 }
2234 }
2235
2236 static void dct_unquantize_mpeg2_c(MpegEncContext *s,
2237 DCTELEM *block, int n, int qscale)
2238 {
2239 int i, level, nCoeffs;
2240 const UINT16 *quant_matrix;
2241
2242 if(s->alternate_scan) nCoeffs= 64;
2243 else nCoeffs= s->block_last_index[n]+1;
2244
2245 if (s->mb_intra) {
2246 if (n < 4)
2247 block[0] = block[0] * s->y_dc_scale;
2248 else
2249 block[0] = block[0] * s->c_dc_scale;
2250 quant_matrix = s->intra_matrix;
2251 for(i=1;i<nCoeffs;i++) {
2252 int j= zigzag_direct[i];
2253 level = block[j];
2254 if (level) {
2255 if (level < 0) {
2256 level = -level;
2257 level = (int)(level * qscale * quant_matrix[j]) >> 3;
2258 level = -level;
2259 } else {
2260 level = (int)(level * qscale * quant_matrix[j]) >> 3;
2261 }
2262 #ifdef PARANOID
2263 if (level < -2048 || level > 2047)
2264 fprintf(stderr, "unquant error %d %d\n", i, level);
2265 #endif
2266 block[j] = level;
2267 }
2268 }
2269 } else {
2270 int sum=-1;
2271 i = 0;
2272 quant_matrix = s->inter_matrix;
2273 for(;i<nCoeffs;i++) {
2274 int j= zigzag_direct[i];
2275 level = block[j];
2276 if (level) {
2277 if (level < 0) {
2278 level = -level;
2279 level = (((level << 1) + 1) * qscale *
2280 ((int) (quant_matrix[j]))) >> 4;
2281 level = -level;
2282 } else {
2283 level = (((level << 1) + 1) * qscale *
2284 ((int) (quant_matrix[j]))) >> 4;
2285 }
2286 #ifdef PARANOID
2287 if (level < -2048 || level > 2047)
2288 fprintf(stderr, "unquant error %d %d\n", i, level);
2289 #endif
2290 block[j] = level;
2291 sum+=level;
2292 }
2293 }
2294 block[63]^=sum&1;
2295 }
2296 }
2297
2298
2299 static void dct_unquantize_h263_c(MpegEncContext *s,
2300 DCTELEM *block, int n, int qscale)
2301 {
2302 int i, level, qmul, qadd;
2303 int nCoeffs;
2304
2305 if (s->mb_intra) {
2306 if (!s->h263_aic) {
2307 if (n < 4)
2308 block[0] = block[0] * s->y_dc_scale;
2309 else
2310 block[0] = block[0] * s->c_dc_scale;
2311 }
2312 i = 1;
2313 nCoeffs= 64; //does not allways use zigzag table
2314 } else {
2315 i = 0;
2316 nCoeffs= zigzag_end[ s->block_last_index[n] ];
2317 }
2318
2319 qmul = s->qscale << 1;
2320 if (s->h263_aic && s->mb_intra)
2321 qadd = 0;
2322 else
2323 qadd = (s->qscale - 1) | 1;
2324
2325 for(;i<nCoeffs;i++) {
2326 level = block[i];
2327 if (level) {
2328 if (level < 0) {
2329 level = level * qmul - qadd;
2330 } else {
2331 level = level * qmul + qadd;
2332 }
2333 #ifdef PARANOID
2334 if (level < -2048 || level > 2047)
2335 fprintf(stderr, "unquant error %d %d\n", i, level);
2336 #endif
2337 block[i] = level;
2338 }
2339 }
2340 }
2341
2342 static void remove_ac(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
2343 {
2344 int dc, dcb, dcr, y, i;
2345 for(i=0; i<4; i++){
2346 dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];
2347 for(y=0; y<8; y++){
2348 int x;
2349 for(x=0; x<8; x++){
2350 dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
2351 }
2352 }
2353 }
2354 dcb = s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
2355 dcr= s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
2356 for(y=0; y<8; y++){
2357 int x;
2358 for(x=0; x<8; x++){
2359 dest_cb[x + y*(s->linesize>>1)]= dcb/8;
2360 dest_cr[x + y*(s->linesize>>1)]= dcr/8;
2361 }
2362 }
2363 }
2364
2365 /**
2366 * will conceal past errors, and allso drop b frames if needed
2367 *
2368 */
2369 void ff_conceal_past_errors(MpegEncContext *s, int unknown_pos)
2370 {
2371 int mb_x= s->mb_x;
2372 int mb_y= s->mb_y;
2373 int mb_dist=0;
2374 int i, intra_count=0, inter_count=0;
2375 int intra_conceal= s->msmpeg4_version ? 50 : 50; //FIXME finetune
2376 int inter_conceal= s->msmpeg4_version ? 50 : 50;
2377
2378 // for last block
2379 if(mb_x>=s->mb_width) mb_x= s->mb_width -1;
2380 if(mb_y>=s->mb_height) mb_y= s->mb_height-1;
2381
2382 if(s->decoding_error==0 && unknown_pos){
2383 if(s->data_partitioning && s->pict_type!=B_TYPE)
2384 s->decoding_error= DECODING_AC_LOST;
2385 else
2386 s->decoding_error= DECODING_DESYNC;
2387 }
2388
2389 if(s->decoding_error==DECODING_DESYNC && s->pict_type!=B_TYPE) s->next_p_frame_damaged=1;
2390
2391 for(i=mb_x + mb_y*s->mb_width; i>=0; i--){
2392 if(s->mbintra_table[i]) intra_count++;
2393 else inter_count++;
2394 }
2395
2396 if(s->decoding_error==DECODING_AC_LOST){
2397 intra_conceal*=2;
2398 inter_conceal*=2;
2399 }else if(s->decoding_error==DECODING_ACDC_LOST){
2400 intra_conceal*=2;
2401 inter_conceal*=2;
2402 }
2403
2404 if(unknown_pos && (intra_count<inter_count)){
2405 intra_conceal= inter_conceal= s->mb_num;
2406 // printf("%d %d\n",intra_count, inter_count);
2407 }
2408
2409 fprintf(stderr, "concealing errors\n");
2410
2411 /* for all MBs from the current one back until the last resync marker */
2412 for(; mb_y>=0 && mb_y>=s->resync_mb_y; mb_y--){
2413 for(; mb_x>=0; mb_x--){
2414 uint8_t *dest_y = s->current_picture[0] + (mb_y * 16* s->linesize ) + mb_x * 16;
2415 uint8_t *dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
2416 uint8_t *dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
2417 int mb_x_backup= s->mb_x; //FIXME pass xy to mpeg_motion
2418 int mb_y_backup= s->mb_y;
2419 s->mb_x=mb_x;
2420 s->mb_y=mb_y;
2421 if(s->mbintra_table[mb_y*s->mb_width + mb_x] && mb_dist<intra_conceal){
2422 if(s->decoding_error==DECODING_AC_LOST){
2423 remove_ac(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
2424 // printf("remove ac to %d %d\n", mb_x, mb_y);
2425 }else{
2426 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
2427 s->last_picture, 0, 0, put_pixels_tab,
2428 0/*mx*/, 0/*my*/, 16);
2429 }
2430 }
2431 else if(!s->mbintra_table[mb_y*s->mb_width + mb_x] && mb_dist<inter_conceal){
2432 int mx=0;
2433 int my=0;
2434
2435 if(s->decoding_error!=DECODING_DESYNC){
2436 int xy= mb_x*2+1 + (mb_y*2+1)*(s->mb_width*2+2);
2437 mx= s->motion_val[ xy ][0];
2438 my= s->motion_val[ xy ][1];
2439 }
2440
2441 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
2442 s->last_picture, 0, 0, put_pixels_tab,
2443 mx, my, 16);
2444 }
2445 s->mb_x= mb_x_backup;
2446 s->mb_y= mb_y_backup;
2447
2448 if(mb_x== s->resync_mb_x && mb_y== s->resync_mb_y) return;
2449 if(!s->mbskip_table[mb_x + mb_y*s->mb_width]) mb_dist++;
2450 }
2451 mb_x=s->mb_width-1;
2452 }
2453 }
2454
2455 AVCodec mpeg1video_encoder = {
2456 "mpeg1video",
2457 CODEC_TYPE_VIDEO,
2458 CODEC_ID_MPEG1VIDEO,
2459 sizeof(MpegEncContext),
2460 MPV_encode_init,
2461 MPV_encode_picture,
2462 MPV_encode_end,
2463 };
2464
2465 AVCodec h263_encoder = {
2466 "h263",
2467 CODEC_TYPE_VIDEO,
2468 CODEC_ID_H263,
2469 sizeof(MpegEncContext),
2470 MPV_encode_init,
2471 MPV_encode_picture,
2472 MPV_encode_end,
2473 };
2474
2475 AVCodec h263p_encoder = {
2476 "h263p",
2477 CODEC_TYPE_VIDEO,
2478 CODEC_ID_H263P,
2479 sizeof(MpegEncContext),
2480 MPV_encode_init,
2481 MPV_encode_picture,
2482 MPV_encode_end,
2483 };
2484
2485 AVCodec rv10_encoder = {
2486 "rv10",
2487 CODEC_TYPE_VIDEO,
2488 CODEC_ID_RV10,
2489 sizeof(MpegEncContext),
2490 MPV_encode_init,
2491 MPV_encode_picture,
2492 MPV_encode_end,
2493 };
2494
2495 AVCodec mjpeg_encoder = {
2496 "mjpeg",
2497 CODEC_TYPE_VIDEO,
2498 CODEC_ID_MJPEG,
2499 sizeof(MpegEncContext),
2500 MPV_encode_init,
2501 MPV_encode_picture,
2502 MPV_encode_end,
2503 };
2504
2505 AVCodec mpeg4_encoder = {
2506 "mpeg4",
2507 CODEC_TYPE_VIDEO,
2508 CODEC_ID_MPEG4,
2509 sizeof(MpegEncContext),
2510 MPV_encode_init,
2511 MPV_encode_picture,
2512 MPV_encode_end,
2513 };
2514
2515 AVCodec msmpeg4v1_encoder = {
2516 "msmpeg4v1",
2517 CODEC_TYPE_VIDEO,
2518 CODEC_ID_MSMPEG4V1,
2519 sizeof(MpegEncContext),
2520 MPV_encode_init,
2521 MPV_encode_picture,
2522 MPV_encode_end,
2523 };
2524
2525 AVCodec msmpeg4v2_encoder = {
2526 "msmpeg4v2",
2527 CODEC_TYPE_VIDEO,
2528 CODEC_ID_MSMPEG4V2,
2529 sizeof(MpegEncContext),
2530 MPV_encode_init,
2531 MPV_encode_picture,
2532 MPV_encode_end,
2533 };
2534
2535 AVCodec msmpeg4v3_encoder = {
2536 "msmpeg4",
2537 CODEC_TYPE_VIDEO,
2538 CODEC_ID_MSMPEG4V3,
2539 sizeof(MpegEncContext),
2540 MPV_encode_init,
2541 MPV_encode_picture,
2542 MPV_encode_end,
2543 };
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