Libav
mpegvideo.c
Go to the documentation of this file.
1 /*
2  * The simplest mpeg encoder (well, it was the simplest!)
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
7  *
8  * This file is part of Libav.
9  *
10  * Libav is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * Libav is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with Libav; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/timer.h"
35 #include "avcodec.h"
36 #include "dsputil.h"
37 #include "internal.h"
38 #include "mathops.h"
39 #include "mpegvideo.h"
40 #include "mjpegenc.h"
41 #include "msmpeg4.h"
42 #include "xvmc_internal.h"
43 #include "thread.h"
44 #include <limits.h>
45 
47 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
48  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
49  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
50 };
51 
53 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
54  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
55  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
56  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
57  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
58  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
59  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
60  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
61  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
62 };
63 
64 static const uint8_t mpeg2_dc_scale_table1[128] = {
65 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
66  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
67  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
68  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
69  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
70  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
71  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
72  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
73  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
74 };
75 
76 static const uint8_t mpeg2_dc_scale_table2[128] = {
77 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
78  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
79  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
80  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
81  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
82  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
83  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
84  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
85  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
86 };
87 
88 static const uint8_t mpeg2_dc_scale_table3[128] = {
89 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
90  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
91  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
92  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
93  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
94  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
95  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
96  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
97  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
98 };
99 
100 const uint8_t *const ff_mpeg2_dc_scale_table[4] = {
105 };
106 
110 };
111 
113  int16_t *block, int n, int qscale)
114 {
115  int i, level, nCoeffs;
116  const uint16_t *quant_matrix;
117 
118  nCoeffs= s->block_last_index[n];
119 
120  if (n < 4)
121  block[0] = block[0] * s->y_dc_scale;
122  else
123  block[0] = block[0] * s->c_dc_scale;
124  /* XXX: only mpeg1 */
125  quant_matrix = s->intra_matrix;
126  for(i=1;i<=nCoeffs;i++) {
127  int j= s->intra_scantable.permutated[i];
128  level = block[j];
129  if (level) {
130  if (level < 0) {
131  level = -level;
132  level = (int)(level * qscale * quant_matrix[j]) >> 3;
133  level = (level - 1) | 1;
134  level = -level;
135  } else {
136  level = (int)(level * qscale * quant_matrix[j]) >> 3;
137  level = (level - 1) | 1;
138  }
139  block[j] = level;
140  }
141  }
142 }
143 
145  int16_t *block, int n, int qscale)
146 {
147  int i, level, nCoeffs;
148  const uint16_t *quant_matrix;
149 
150  nCoeffs= s->block_last_index[n];
151 
152  quant_matrix = s->inter_matrix;
153  for(i=0; i<=nCoeffs; i++) {
154  int j= s->intra_scantable.permutated[i];
155  level = block[j];
156  if (level) {
157  if (level < 0) {
158  level = -level;
159  level = (((level << 1) + 1) * qscale *
160  ((int) (quant_matrix[j]))) >> 4;
161  level = (level - 1) | 1;
162  level = -level;
163  } else {
164  level = (((level << 1) + 1) * qscale *
165  ((int) (quant_matrix[j]))) >> 4;
166  level = (level - 1) | 1;
167  }
168  block[j] = level;
169  }
170  }
171 }
172 
174  int16_t *block, int n, int qscale)
175 {
176  int i, level, nCoeffs;
177  const uint16_t *quant_matrix;
178 
179  if(s->alternate_scan) nCoeffs= 63;
180  else nCoeffs= s->block_last_index[n];
181 
182  if (n < 4)
183  block[0] = block[0] * s->y_dc_scale;
184  else
185  block[0] = block[0] * s->c_dc_scale;
186  quant_matrix = s->intra_matrix;
187  for(i=1;i<=nCoeffs;i++) {
188  int j= s->intra_scantable.permutated[i];
189  level = block[j];
190  if (level) {
191  if (level < 0) {
192  level = -level;
193  level = (int)(level * qscale * quant_matrix[j]) >> 3;
194  level = -level;
195  } else {
196  level = (int)(level * qscale * quant_matrix[j]) >> 3;
197  }
198  block[j] = level;
199  }
200  }
201 }
202 
204  int16_t *block, int n, int qscale)
205 {
206  int i, level, nCoeffs;
207  const uint16_t *quant_matrix;
208  int sum=-1;
209 
210  if(s->alternate_scan) nCoeffs= 63;
211  else nCoeffs= s->block_last_index[n];
212 
213  if (n < 4)
214  block[0] = block[0] * s->y_dc_scale;
215  else
216  block[0] = block[0] * s->c_dc_scale;
217  quant_matrix = s->intra_matrix;
218  for(i=1;i<=nCoeffs;i++) {
219  int j= s->intra_scantable.permutated[i];
220  level = block[j];
221  if (level) {
222  if (level < 0) {
223  level = -level;
224  level = (int)(level * qscale * quant_matrix[j]) >> 3;
225  level = -level;
226  } else {
227  level = (int)(level * qscale * quant_matrix[j]) >> 3;
228  }
229  block[j] = level;
230  sum+=level;
231  }
232  }
233  block[63]^=sum&1;
234 }
235 
237  int16_t *block, int n, int qscale)
238 {
239  int i, level, nCoeffs;
240  const uint16_t *quant_matrix;
241  int sum=-1;
242 
243  if(s->alternate_scan) nCoeffs= 63;
244  else nCoeffs= s->block_last_index[n];
245 
246  quant_matrix = s->inter_matrix;
247  for(i=0; i<=nCoeffs; i++) {
248  int j= s->intra_scantable.permutated[i];
249  level = block[j];
250  if (level) {
251  if (level < 0) {
252  level = -level;
253  level = (((level << 1) + 1) * qscale *
254  ((int) (quant_matrix[j]))) >> 4;
255  level = -level;
256  } else {
257  level = (((level << 1) + 1) * qscale *
258  ((int) (quant_matrix[j]))) >> 4;
259  }
260  block[j] = level;
261  sum+=level;
262  }
263  }
264  block[63]^=sum&1;
265 }
266 
268  int16_t *block, int n, int qscale)
269 {
270  int i, level, qmul, qadd;
271  int nCoeffs;
272 
273  assert(s->block_last_index[n]>=0);
274 
275  qmul = qscale << 1;
276 
277  if (!s->h263_aic) {
278  if (n < 4)
279  block[0] = block[0] * s->y_dc_scale;
280  else
281  block[0] = block[0] * s->c_dc_scale;
282  qadd = (qscale - 1) | 1;
283  }else{
284  qadd = 0;
285  }
286  if(s->ac_pred)
287  nCoeffs=63;
288  else
289  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
290 
291  for(i=1; i<=nCoeffs; i++) {
292  level = block[i];
293  if (level) {
294  if (level < 0) {
295  level = level * qmul - qadd;
296  } else {
297  level = level * qmul + qadd;
298  }
299  block[i] = level;
300  }
301  }
302 }
303 
305  int16_t *block, int n, int qscale)
306 {
307  int i, level, qmul, qadd;
308  int nCoeffs;
309 
310  assert(s->block_last_index[n]>=0);
311 
312  qadd = (qscale - 1) | 1;
313  qmul = qscale << 1;
314 
315  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
316 
317  for(i=0; i<=nCoeffs; i++) {
318  level = block[i];
319  if (level) {
320  if (level < 0) {
321  level = level * qmul - qadd;
322  } else {
323  level = level * qmul + qadd;
324  }
325  block[i] = level;
326  }
327  }
328 }
329 
330 static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
331  int (*mv)[2][4][2],
332  int mb_x, int mb_y, int mb_intra, int mb_skipped)
333 {
334  MpegEncContext *s = opaque;
335 
336  s->mv_dir = mv_dir;
337  s->mv_type = mv_type;
338  s->mb_intra = mb_intra;
339  s->mb_skipped = mb_skipped;
340  s->mb_x = mb_x;
341  s->mb_y = mb_y;
342  memcpy(s->mv, mv, sizeof(*mv));
343 
346 
347  s->dsp.clear_blocks(s->block[0]);
348 
349  s->dest[0] = s->current_picture.f.data[0] + (s->mb_y * 16 * s->linesize) + s->mb_x * 16;
350  s->dest[1] = s->current_picture.f.data[1] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
351  s->dest[2] = s->current_picture.f.data[2] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
352 
353  assert(ref == 0);
354  ff_MPV_decode_mb(s, s->block);
355 }
356 
357 /* init common dct for both encoder and decoder */
359 {
360  ff_dsputil_init(&s->dsp, s->avctx);
361  ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
363 
369  if (s->flags & CODEC_FLAG_BITEXACT)
372 
373  if (ARCH_ARM)
375  if (ARCH_PPC)
377  if (ARCH_X86)
379 
380  /* load & permutate scantables
381  * note: only wmv uses different ones
382  */
383  if (s->alternate_scan) {
386  } else {
389  }
392 
393  return 0;
394 }
395 
396 static int frame_size_alloc(MpegEncContext *s, int linesize)
397 {
398  int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
399 
400  // edge emu needs blocksize + filter length - 1
401  // (= 17x17 for halfpel / 21x21 for h264)
402  // VC1 computes luma and chroma simultaneously and needs 19X19 + 9x9
403  // at uvlinesize. It supports only YUV420 so 24x24 is enough
404  // linesize * interlaced * MBsize
405  FF_ALLOCZ_OR_GOTO(s->avctx, s->edge_emu_buffer, alloc_size * 2 * 24,
406  fail);
407 
408  FF_ALLOCZ_OR_GOTO(s->avctx, s->me.scratchpad, alloc_size * 2 * 16 * 3,
409  fail)
410  s->me.temp = s->me.scratchpad;
411  s->rd_scratchpad = s->me.scratchpad;
412  s->b_scratchpad = s->me.scratchpad;
413  s->obmc_scratchpad = s->me.scratchpad + 16;
414 
415  return 0;
416 fail:
418  return AVERROR(ENOMEM);
419 }
420 
425 {
426  int edges_needed = av_codec_is_encoder(s->avctx->codec);
427  int r, ret;
428 
429  pic->tf.f = &pic->f;
430  if (s->codec_id != AV_CODEC_ID_WMV3IMAGE &&
432  s->codec_id != AV_CODEC_ID_MSS2) {
433  if (edges_needed) {
434  pic->f.width = s->avctx->width + 2 * EDGE_WIDTH;
435  pic->f.height = s->avctx->height + 2 * EDGE_WIDTH;
436  }
437 
438  r = ff_thread_get_buffer(s->avctx, &pic->tf,
439  pic->reference ? AV_GET_BUFFER_FLAG_REF : 0);
440  } else {
441  pic->f.width = s->avctx->width;
442  pic->f.height = s->avctx->height;
443  pic->f.format = s->avctx->pix_fmt;
444  r = avcodec_default_get_buffer2(s->avctx, &pic->f, 0);
445  }
446 
447  if (r < 0 || !pic->f.buf[0]) {
448  av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed (%d %p)\n",
449  r, pic->f.data[0]);
450  return -1;
451  }
452 
453  if (edges_needed) {
454  int i;
455  for (i = 0; pic->f.data[i]; i++) {
456  int offset = (EDGE_WIDTH >> (i ? s->chroma_y_shift : 0)) *
457  pic->f.linesize[i] +
458  (EDGE_WIDTH >> (i ? s->chroma_x_shift : 0));
459  pic->f.data[i] += offset;
460  }
461  pic->f.width = s->avctx->width;
462  pic->f.height = s->avctx->height;
463  }
464 
465  if (s->avctx->hwaccel) {
466  assert(!pic->hwaccel_picture_private);
467  if (s->avctx->hwaccel->priv_data_size) {
469  if (!pic->hwaccel_priv_buf) {
470  av_log(s->avctx, AV_LOG_ERROR, "alloc_frame_buffer() failed (hwaccel private data allocation)\n");
471  return -1;
472  }
474  }
475  }
476 
477  if (s->linesize && (s->linesize != pic->f.linesize[0] ||
478  s->uvlinesize != pic->f.linesize[1])) {
480  "get_buffer() failed (stride changed)\n");
481  ff_mpeg_unref_picture(s, pic);
482  return -1;
483  }
484 
485  if (pic->f.linesize[1] != pic->f.linesize[2]) {
487  "get_buffer() failed (uv stride mismatch)\n");
488  ff_mpeg_unref_picture(s, pic);
489  return -1;
490  }
491 
492  if (!s->edge_emu_buffer &&
493  (ret = frame_size_alloc(s, pic->f.linesize[0])) < 0) {
495  "get_buffer() failed to allocate context scratch buffers.\n");
496  ff_mpeg_unref_picture(s, pic);
497  return ret;
498  }
499 
500  return 0;
501 }
502 
504 {
505  int i;
506 
513 
514  for (i = 0; i < 2; i++) {
516  av_buffer_unref(&pic->ref_index_buf[i]);
517  }
518 }
519 
521 {
522  const int big_mb_num = s->mb_stride * (s->mb_height + 1) + 1;
523  const int mb_array_size = s->mb_stride * s->mb_height;
524  const int b8_array_size = s->b8_stride * s->mb_height * 2;
525  int i;
526 
527 
528  pic->mbskip_table_buf = av_buffer_allocz(mb_array_size + 2);
529  pic->qscale_table_buf = av_buffer_allocz(big_mb_num + s->mb_stride);
530  pic->mb_type_buf = av_buffer_allocz((big_mb_num + s->mb_stride) *
531  sizeof(uint32_t));
532  if (!pic->mbskip_table_buf || !pic->qscale_table_buf || !pic->mb_type_buf)
533  return AVERROR(ENOMEM);
534 
535  if (s->encoding) {
536  pic->mb_var_buf = av_buffer_allocz(mb_array_size * sizeof(int16_t));
537  pic->mc_mb_var_buf = av_buffer_allocz(mb_array_size * sizeof(int16_t));
538  pic->mb_mean_buf = av_buffer_allocz(mb_array_size);
539  if (!pic->mb_var_buf || !pic->mc_mb_var_buf || !pic->mb_mean_buf)
540  return AVERROR(ENOMEM);
541  }
542 
543  if (s->out_format == FMT_H263 || s->encoding) {
544  int mv_size = 2 * (b8_array_size + 4) * sizeof(int16_t);
545  int ref_index_size = 4 * mb_array_size;
546 
547  for (i = 0; mv_size && i < 2; i++) {
548  pic->motion_val_buf[i] = av_buffer_allocz(mv_size);
549  pic->ref_index_buf[i] = av_buffer_allocz(ref_index_size);
550  if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
551  return AVERROR(ENOMEM);
552  }
553  }
554 
555  return 0;
556 }
557 
559 {
560  int ret, i;
561 #define MAKE_WRITABLE(table) \
562 do {\
563  if (pic->table &&\
564  (ret = av_buffer_make_writable(&pic->table)) < 0)\
565  return ret;\
566 } while (0)
567 
568  MAKE_WRITABLE(mb_var_buf);
569  MAKE_WRITABLE(mc_mb_var_buf);
570  MAKE_WRITABLE(mb_mean_buf);
571  MAKE_WRITABLE(mbskip_table_buf);
572  MAKE_WRITABLE(qscale_table_buf);
573  MAKE_WRITABLE(mb_type_buf);
574 
575  for (i = 0; i < 2; i++) {
576  MAKE_WRITABLE(motion_val_buf[i]);
577  MAKE_WRITABLE(ref_index_buf[i]);
578  }
579 
580  return 0;
581 }
582 
587 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared)
588 {
589  int i, ret;
590 
591  if (shared) {
592  assert(pic->f.data[0]);
593  pic->shared = 1;
594  } else {
595  assert(!pic->f.buf[0]);
596 
597  if (alloc_frame_buffer(s, pic) < 0)
598  return -1;
599 
600  s->linesize = pic->f.linesize[0];
601  s->uvlinesize = pic->f.linesize[1];
602  }
603 
604  if (!pic->qscale_table_buf)
605  ret = alloc_picture_tables(s, pic);
606  else
607  ret = make_tables_writable(pic);
608  if (ret < 0)
609  goto fail;
610 
611  if (s->encoding) {
612  pic->mb_var = (uint16_t*)pic->mb_var_buf->data;
613  pic->mc_mb_var = (uint16_t*)pic->mc_mb_var_buf->data;
614  pic->mb_mean = pic->mb_mean_buf->data;
615  }
616 
617  pic->mbskip_table = pic->mbskip_table_buf->data;
618  pic->qscale_table = pic->qscale_table_buf->data + 2 * s->mb_stride + 1;
619  pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * s->mb_stride + 1;
620 
621  if (pic->motion_val_buf[0]) {
622  for (i = 0; i < 2; i++) {
623  pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
624  pic->ref_index[i] = pic->ref_index_buf[i]->data;
625  }
626  }
627 
628  return 0;
629 fail:
630  av_log(s->avctx, AV_LOG_ERROR, "Error allocating a picture.\n");
631  ff_mpeg_unref_picture(s, pic);
633  return AVERROR(ENOMEM);
634 }
635 
640 {
641  int off = offsetof(Picture, mb_mean) + sizeof(pic->mb_mean);
642 
643  pic->tf.f = &pic->f;
644  /* WM Image / Screen codecs allocate internal buffers with different
645  * dimensions / colorspaces; ignore user-defined callbacks for these. */
646  if (s->codec_id != AV_CODEC_ID_WMV3IMAGE &&
649  ff_thread_release_buffer(s->avctx, &pic->tf);
650  else
651  av_frame_unref(&pic->f);
652 
654 
655  if (pic->needs_realloc)
657 
658  memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
659 }
660 
661 static int update_picture_tables(Picture *dst, Picture *src)
662 {
663  int i;
664 
665 #define UPDATE_TABLE(table)\
666 do {\
667  if (src->table &&\
668  (!dst->table || dst->table->buffer != src->table->buffer)) {\
669  av_buffer_unref(&dst->table);\
670  dst->table = av_buffer_ref(src->table);\
671  if (!dst->table) {\
672  ff_free_picture_tables(dst);\
673  return AVERROR(ENOMEM);\
674  }\
675  }\
676 } while (0)
677 
678  UPDATE_TABLE(mb_var_buf);
679  UPDATE_TABLE(mc_mb_var_buf);
680  UPDATE_TABLE(mb_mean_buf);
681  UPDATE_TABLE(mbskip_table_buf);
682  UPDATE_TABLE(qscale_table_buf);
683  UPDATE_TABLE(mb_type_buf);
684  for (i = 0; i < 2; i++) {
685  UPDATE_TABLE(motion_val_buf[i]);
686  UPDATE_TABLE(ref_index_buf[i]);
687  }
688 
689  dst->mb_var = src->mb_var;
690  dst->mc_mb_var = src->mc_mb_var;
691  dst->mb_mean = src->mb_mean;
692  dst->mbskip_table = src->mbskip_table;
693  dst->qscale_table = src->qscale_table;
694  dst->mb_type = src->mb_type;
695  for (i = 0; i < 2; i++) {
696  dst->motion_val[i] = src->motion_val[i];
697  dst->ref_index[i] = src->ref_index[i];
698  }
699 
700  return 0;
701 }
702 
704 {
705  int ret;
706 
707  av_assert0(!dst->f.buf[0]);
708  av_assert0(src->f.buf[0]);
709 
710  src->tf.f = &src->f;
711  dst->tf.f = &dst->f;
712  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
713  if (ret < 0)
714  goto fail;
715 
716  ret = update_picture_tables(dst, src);
717  if (ret < 0)
718  goto fail;
719 
720  if (src->hwaccel_picture_private) {
722  if (!dst->hwaccel_priv_buf)
723  goto fail;
725  }
726 
727  dst->field_picture = src->field_picture;
728  dst->mb_var_sum = src->mb_var_sum;
729  dst->mc_mb_var_sum = src->mc_mb_var_sum;
730  dst->b_frame_score = src->b_frame_score;
731  dst->needs_realloc = src->needs_realloc;
732  dst->reference = src->reference;
733  dst->shared = src->shared;
734 
735  return 0;
736 fail:
737  ff_mpeg_unref_picture(s, dst);
738  return ret;
739 }
740 
742 {
743  int16_t (*tmp)[64];
744 
745  tmp = s->pblocks[4];
746  s->pblocks[4] = s->pblocks[5];
747  s->pblocks[5] = tmp;
748 }
749 
751 {
752  int y_size = s->b8_stride * (2 * s->mb_height + 1);
753  int c_size = s->mb_stride * (s->mb_height + 1);
754  int yc_size = y_size + 2 * c_size;
755  int i;
756 
757  s->edge_emu_buffer =
758  s->me.scratchpad =
759  s->me.temp =
760  s->rd_scratchpad =
761  s->b_scratchpad =
762  s->obmc_scratchpad = NULL;
763 
764  if (s->encoding) {
765  FF_ALLOCZ_OR_GOTO(s->avctx, s->me.map,
766  ME_MAP_SIZE * sizeof(uint32_t), fail)
768  ME_MAP_SIZE * sizeof(uint32_t), fail)
769  if (s->avctx->noise_reduction) {
771  2 * 64 * sizeof(int), fail)
772  }
773  }
774  FF_ALLOCZ_OR_GOTO(s->avctx, s->blocks, 64 * 12 * 2 * sizeof(int16_t), fail)
775  s->block = s->blocks[0];
776 
777  for (i = 0; i < 12; i++) {
778  s->pblocks[i] = &s->block[i];
779  }
780  if (s->avctx->codec_tag == AV_RL32("VCR2"))
781  exchange_uv(s);
782 
783  if (s->out_format == FMT_H263) {
784  /* ac values */
786  yc_size * sizeof(int16_t) * 16, fail);
787  s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
788  s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
789  s->ac_val[2] = s->ac_val[1] + c_size;
790  }
791 
792  return 0;
793 fail:
794  return -1; // free() through ff_MPV_common_end()
795 }
796 
798 {
799  if (s == NULL)
800  return;
801 
803  av_freep(&s->me.scratchpad);
804  s->me.temp =
805  s->rd_scratchpad =
806  s->b_scratchpad =
807  s->obmc_scratchpad = NULL;
808 
809  av_freep(&s->dct_error_sum);
810  av_freep(&s->me.map);
811  av_freep(&s->me.score_map);
812  av_freep(&s->blocks);
813  av_freep(&s->ac_val_base);
814  s->block = NULL;
815 }
816 
818 {
819 #define COPY(a) bak->a = src->a
820  COPY(edge_emu_buffer);
821  COPY(me.scratchpad);
822  COPY(me.temp);
823  COPY(rd_scratchpad);
824  COPY(b_scratchpad);
825  COPY(obmc_scratchpad);
826  COPY(me.map);
827  COPY(me.score_map);
828  COPY(blocks);
829  COPY(block);
830  COPY(start_mb_y);
831  COPY(end_mb_y);
832  COPY(me.map_generation);
833  COPY(pb);
834  COPY(dct_error_sum);
835  COPY(dct_count[0]);
836  COPY(dct_count[1]);
837  COPY(ac_val_base);
838  COPY(ac_val[0]);
839  COPY(ac_val[1]);
840  COPY(ac_val[2]);
841 #undef COPY
842 }
843 
845 {
846  MpegEncContext bak;
847  int i, ret;
848  // FIXME copy only needed parts
849  // START_TIMER
850  backup_duplicate_context(&bak, dst);
851  memcpy(dst, src, sizeof(MpegEncContext));
852  backup_duplicate_context(dst, &bak);
853  for (i = 0; i < 12; i++) {
854  dst->pblocks[i] = &dst->block[i];
855  }
856  if (dst->avctx->codec_tag == AV_RL32("VCR2"))
857  exchange_uv(dst);
858  if (!dst->edge_emu_buffer &&
859  (ret = frame_size_alloc(dst, dst->linesize)) < 0) {
860  av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
861  "scratch buffers.\n");
862  return ret;
863  }
864  // STOP_TIMER("update_duplicate_context")
865  // about 10k cycles / 0.01 sec for 1000frames on 1ghz with 2 threads
866  return 0;
867 }
868 
870  const AVCodecContext *src)
871 {
872  int i, ret;
873  MpegEncContext *s = dst->priv_data, *s1 = src->priv_data;
874 
875  if (dst == src || !s1->context_initialized)
876  return 0;
877 
878  // FIXME can parameters change on I-frames?
879  // in that case dst may need a reinit
880  if (!s->context_initialized) {
881  memcpy(s, s1, sizeof(MpegEncContext));
882 
883  s->avctx = dst;
884  s->bitstream_buffer = NULL;
886 
888  }
889 
890  if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
891  int err;
892  s->context_reinit = 0;
893  s->height = s1->height;
894  s->width = s1->width;
895  if ((err = ff_MPV_common_frame_size_change(s)) < 0)
896  return err;
897  }
898 
899  s->avctx->coded_height = s1->avctx->coded_height;
900  s->avctx->coded_width = s1->avctx->coded_width;
901  s->avctx->width = s1->avctx->width;
902  s->avctx->height = s1->avctx->height;
903 
904  s->coded_picture_number = s1->coded_picture_number;
905  s->picture_number = s1->picture_number;
906 
907  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
908  ff_mpeg_unref_picture(s, &s->picture[i]);
909  if (s1->picture[i].f.buf[0] &&
910  (ret = ff_mpeg_ref_picture(s, &s->picture[i], &s1->picture[i])) < 0)
911  return ret;
912  }
913 
914 #define UPDATE_PICTURE(pic)\
915 do {\
916  ff_mpeg_unref_picture(s, &s->pic);\
917  if (s1->pic.f.buf[0])\
918  ret = ff_mpeg_ref_picture(s, &s->pic, &s1->pic);\
919  else\
920  ret = update_picture_tables(&s->pic, &s1->pic);\
921  if (ret < 0)\
922  return ret;\
923 } while (0)
924 
925  UPDATE_PICTURE(current_picture);
926  UPDATE_PICTURE(last_picture);
927  UPDATE_PICTURE(next_picture);
928 
929  s->last_picture_ptr = REBASE_PICTURE(s1->last_picture_ptr, s, s1);
930  s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1);
931  s->next_picture_ptr = REBASE_PICTURE(s1->next_picture_ptr, s, s1);
932 
933  // Error/bug resilience
934  s->next_p_frame_damaged = s1->next_p_frame_damaged;
935  s->workaround_bugs = s1->workaround_bugs;
936 
937  // MPEG4 timing info
938  memcpy(&s->last_time_base, &s1->last_time_base,
939  (char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
940  (char *) &s1->last_time_base);
941 
942  // B-frame info
943  s->max_b_frames = s1->max_b_frames;
944  s->low_delay = s1->low_delay;
945  s->droppable = s1->droppable;
946 
947  // DivX handling (doesn't work)
948  s->divx_packed = s1->divx_packed;
949 
950  if (s1->bitstream_buffer) {
951  if (s1->bitstream_buffer_size +
955  s1->allocated_bitstream_buffer_size);
956  s->bitstream_buffer_size = s1->bitstream_buffer_size;
957  memcpy(s->bitstream_buffer, s1->bitstream_buffer,
958  s1->bitstream_buffer_size);
959  memset(s->bitstream_buffer + s->bitstream_buffer_size, 0,
961  }
962 
963  // linesize dependend scratch buffer allocation
964  if (!s->edge_emu_buffer)
965  if (s1->linesize) {
966  if (frame_size_alloc(s, s1->linesize) < 0) {
967  av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
968  "scratch buffers.\n");
969  return AVERROR(ENOMEM);
970  }
971  } else {
972  av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not "
973  "be allocated due to unknown size.\n");
974  return AVERROR_BUG;
975  }
976 
977  // MPEG2/interlacing info
978  memcpy(&s->progressive_sequence, &s1->progressive_sequence,
979  (char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
980 
981  if (!s1->first_field) {
982  s->last_pict_type = s1->pict_type;
983  if (s1->current_picture_ptr)
984  s->last_lambda_for[s1->pict_type] = s1->current_picture_ptr->f.quality;
985  }
986 
987  return 0;
988 }
989 
997 {
998  s->y_dc_scale_table =
1001  s->progressive_frame = 1;
1002  s->progressive_sequence = 1;
1004 
1005  s->coded_picture_number = 0;
1006  s->picture_number = 0;
1007 
1008  s->f_code = 1;
1009  s->b_code = 1;
1010 
1011  s->slice_context_count = 1;
1012 }
1013 
1020 {
1022 }
1023 
1024 static int init_er(MpegEncContext *s)
1025 {
1026  ERContext *er = &s->er;
1027  int mb_array_size = s->mb_height * s->mb_stride;
1028  int i;
1029 
1030  er->avctx = s->avctx;
1031  er->dsp = &s->dsp;
1032 
1033  er->mb_index2xy = s->mb_index2xy;
1034  er->mb_num = s->mb_num;
1035  er->mb_width = s->mb_width;
1036  er->mb_height = s->mb_height;
1037  er->mb_stride = s->mb_stride;
1038  er->b8_stride = s->b8_stride;
1039 
1041  er->error_status_table = av_mallocz(mb_array_size);
1042  if (!er->er_temp_buffer || !er->error_status_table)
1043  goto fail;
1044 
1045  er->mbskip_table = s->mbskip_table;
1046  er->mbintra_table = s->mbintra_table;
1047 
1048  for (i = 0; i < FF_ARRAY_ELEMS(s->dc_val); i++)
1049  er->dc_val[i] = s->dc_val[i];
1050 
1052  er->opaque = s;
1053 
1054  return 0;
1055 fail:
1056  av_freep(&er->er_temp_buffer);
1058  return AVERROR(ENOMEM);
1059 }
1060 
1065 {
1066  int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;
1067 
1068  s->mb_width = (s->width + 15) / 16;
1069  s->mb_stride = s->mb_width + 1;
1070  s->b8_stride = s->mb_width * 2 + 1;
1071  s->b4_stride = s->mb_width * 4 + 1;
1072  mb_array_size = s->mb_height * s->mb_stride;
1073  mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
1074 
1075  /* set default edge pos, will be overriden
1076  * in decode_header if needed */
1077  s->h_edge_pos = s->mb_width * 16;
1078  s->v_edge_pos = s->mb_height * 16;
1079 
1080  s->mb_num = s->mb_width * s->mb_height;
1081 
1082  s->block_wrap[0] =
1083  s->block_wrap[1] =
1084  s->block_wrap[2] =
1085  s->block_wrap[3] = s->b8_stride;
1086  s->block_wrap[4] =
1087  s->block_wrap[5] = s->mb_stride;
1088 
1089  y_size = s->b8_stride * (2 * s->mb_height + 1);
1090  c_size = s->mb_stride * (s->mb_height + 1);
1091  yc_size = y_size + 2 * c_size;
1092 
1093  FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
1094  fail); // error ressilience code looks cleaner with this
1095  for (y = 0; y < s->mb_height; y++)
1096  for (x = 0; x < s->mb_width; x++)
1097  s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
1098 
1099  s->mb_index2xy[s->mb_height * s->mb_width] =
1100  (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
1101 
1102  if (s->encoding) {
1103  /* Allocate MV tables */
1105  mv_table_size * 2 * sizeof(int16_t), fail);
1107  mv_table_size * 2 * sizeof(int16_t), fail);
1109  mv_table_size * 2 * sizeof(int16_t), fail);
1111  mv_table_size * 2 * sizeof(int16_t), fail);
1113  mv_table_size * 2 * sizeof(int16_t), fail);
1115  mv_table_size * 2 * sizeof(int16_t), fail);
1116  s->p_mv_table = s->p_mv_table_base + s->mb_stride + 1;
1120  s->mb_stride + 1;
1122  s->mb_stride + 1;
1124 
1125  /* Allocate MB type table */
1126  FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_type, mb_array_size *
1127  sizeof(uint16_t), fail); // needed for encoding
1128 
1129  FF_ALLOCZ_OR_GOTO(s->avctx, s->lambda_table, mb_array_size *
1130  sizeof(int), fail);
1131 
1133  mb_array_size * sizeof(float), fail);
1135  mb_array_size * sizeof(float), fail);
1136 
1137  }
1138 
1139  if (s->codec_id == AV_CODEC_ID_MPEG4 ||
1141  /* interlaced direct mode decoding tables */
1142  for (i = 0; i < 2; i++) {
1143  int j, k;
1144  for (j = 0; j < 2; j++) {
1145  for (k = 0; k < 2; k++) {
1147  s->b_field_mv_table_base[i][j][k],
1148  mv_table_size * 2 * sizeof(int16_t),
1149  fail);
1150  s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] +
1151  s->mb_stride + 1;
1152  }
1154  mb_array_size * 2 * sizeof(uint8_t), fail);
1156  mv_table_size * 2 * sizeof(int16_t), fail);
1157  s->p_field_mv_table[i][j] = s->p_field_mv_table_base[i][j]
1158  + s->mb_stride + 1;
1159  }
1161  mb_array_size * 2 * sizeof(uint8_t), fail);
1162  }
1163  }
1164  if (s->out_format == FMT_H263) {
1165  /* cbp values */
1166  FF_ALLOCZ_OR_GOTO(s->avctx, s->coded_block_base, y_size, fail);
1167  s->coded_block = s->coded_block_base + s->b8_stride + 1;
1168 
1169  /* cbp, ac_pred, pred_dir */
1171  mb_array_size * sizeof(uint8_t), fail);
1173  mb_array_size * sizeof(uint8_t), fail);
1174  }
1175 
1176  if (s->h263_pred || s->h263_plus || !s->encoding) {
1177  /* dc values */
1178  // MN: we need these for error resilience of intra-frames
1180  yc_size * sizeof(int16_t), fail);
1181  s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
1182  s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
1183  s->dc_val[2] = s->dc_val[1] + c_size;
1184  for (i = 0; i < yc_size; i++)
1185  s->dc_val_base[i] = 1024;
1186  }
1187 
1188  /* which mb is a intra block */
1189  FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
1190  memset(s->mbintra_table, 1, mb_array_size);
1191 
1192  /* init macroblock skip table */
1193  FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
1194  // Note the + 1 is for a quicker mpeg4 slice_end detection
1195 
1196  return init_er(s);
1197 fail:
1198  return AVERROR(ENOMEM);
1199 }
1200 
1206 {
1207  int i;
1208  int nb_slices = (HAVE_THREADS &&
1210  s->avctx->thread_count : 1;
1211 
1212  if (s->encoding && s->avctx->slices)
1213  nb_slices = s->avctx->slices;
1214 
1216  s->mb_height = (s->height + 31) / 32 * 2;
1217  else
1218  s->mb_height = (s->height + 15) / 16;
1219 
1220  if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
1222  "decoding to AV_PIX_FMT_NONE is not supported.\n");
1223  return -1;
1224  }
1225 
1226  if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
1227  int max_slices;
1228  if (s->mb_height)
1229  max_slices = FFMIN(MAX_THREADS, s->mb_height);
1230  else
1231  max_slices = MAX_THREADS;
1232  av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
1233  " reducing to %d\n", nb_slices, max_slices);
1234  nb_slices = max_slices;
1235  }
1236 
1237  if ((s->width || s->height) &&
1238  av_image_check_size(s->width, s->height, 0, s->avctx))
1239  return -1;
1240 
1241  ff_dct_common_init(s);
1242 
1243  s->flags = s->avctx->flags;
1244  s->flags2 = s->avctx->flags2;
1245 
1246  /* set chroma shifts */
1248  &s->chroma_x_shift,
1249  &s->chroma_y_shift);
1250 
1251  /* convert fourcc to upper case */
1253 
1255 
1257  MAX_PICTURE_COUNT * sizeof(Picture), fail);
1258  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1259  av_frame_unref(&s->picture[i].f);
1260  }
1261  memset(&s->next_picture, 0, sizeof(s->next_picture));
1262  memset(&s->last_picture, 0, sizeof(s->last_picture));
1263  memset(&s->current_picture, 0, sizeof(s->current_picture));
1267 
1268  if (s->width && s->height) {
1269  if (init_context_frame(s))
1270  goto fail;
1271 
1272  s->parse_context.state = -1;
1273  }
1274 
1275  s->context_initialized = 1;
1276  s->thread_context[0] = s;
1277 
1278  if (s->width && s->height) {
1279  if (nb_slices > 1) {
1280  for (i = 1; i < nb_slices; i++) {
1281  s->thread_context[i] = av_malloc(sizeof(MpegEncContext));
1282  memcpy(s->thread_context[i], s, sizeof(MpegEncContext));
1283  }
1284 
1285  for (i = 0; i < nb_slices; i++) {
1286  if (init_duplicate_context(s->thread_context[i]) < 0)
1287  goto fail;
1288  s->thread_context[i]->start_mb_y =
1289  (s->mb_height * (i) + nb_slices / 2) / nb_slices;
1290  s->thread_context[i]->end_mb_y =
1291  (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
1292  }
1293  } else {
1294  if (init_duplicate_context(s) < 0)
1295  goto fail;
1296  s->start_mb_y = 0;
1297  s->end_mb_y = s->mb_height;
1298  }
1299  s->slice_context_count = nb_slices;
1300  }
1301 
1302  return 0;
1303  fail:
1304  ff_MPV_common_end(s);
1305  return -1;
1306 }
1307 
1314 {
1315  int i, j, k;
1316 
1317  av_freep(&s->mb_type);
1324  s->p_mv_table = NULL;
1325  s->b_forw_mv_table = NULL;
1326  s->b_back_mv_table = NULL;
1329  s->b_direct_mv_table = NULL;
1330  for (i = 0; i < 2; i++) {
1331  for (j = 0; j < 2; j++) {
1332  for (k = 0; k < 2; k++) {
1333  av_freep(&s->b_field_mv_table_base[i][j][k]);
1334  s->b_field_mv_table[i][j][k] = NULL;
1335  }
1336  av_freep(&s->b_field_select_table[i][j]);
1337  av_freep(&s->p_field_mv_table_base[i][j]);
1338  s->p_field_mv_table[i][j] = NULL;
1339  }
1341  }
1342 
1343  av_freep(&s->dc_val_base);
1345  av_freep(&s->mbintra_table);
1346  av_freep(&s->cbp_table);
1347  av_freep(&s->pred_dir_table);
1348 
1349  av_freep(&s->mbskip_table);
1350 
1352  av_freep(&s->er.er_temp_buffer);
1353  av_freep(&s->mb_index2xy);
1354  av_freep(&s->lambda_table);
1355  av_freep(&s->cplx_tab);
1356  av_freep(&s->bits_tab);
1357 
1358  s->linesize = s->uvlinesize = 0;
1359 
1360  return 0;
1361 }
1362 
1364 {
1365  int i, err = 0;
1366 
1367  if (s->slice_context_count > 1) {
1368  for (i = 0; i < s->slice_context_count; i++) {
1370  }
1371  for (i = 1; i < s->slice_context_count; i++) {
1372  av_freep(&s->thread_context[i]);
1373  }
1374  } else
1376 
1377  if ((err = free_context_frame(s)) < 0)
1378  return err;
1379 
1380  if (s->picture)
1381  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1382  s->picture[i].needs_realloc = 1;
1383  }
1384 
1385  s->last_picture_ptr =
1386  s->next_picture_ptr =
1388 
1389  // init
1391  s->mb_height = (s->height + 31) / 32 * 2;
1392  else
1393  s->mb_height = (s->height + 15) / 16;
1394 
1395  if ((s->width || s->height) &&
1396  av_image_check_size(s->width, s->height, 0, s->avctx))
1397  return AVERROR_INVALIDDATA;
1398 
1399  if ((err = init_context_frame(s)))
1400  goto fail;
1401 
1402  s->thread_context[0] = s;
1403 
1404  if (s->width && s->height) {
1405  int nb_slices = s->slice_context_count;
1406  if (nb_slices > 1) {
1407  for (i = 1; i < nb_slices; i++) {
1408  s->thread_context[i] = av_malloc(sizeof(MpegEncContext));
1409  memcpy(s->thread_context[i], s, sizeof(MpegEncContext));
1410  }
1411 
1412  for (i = 0; i < nb_slices; i++) {
1413  if (init_duplicate_context(s->thread_context[i]) < 0)
1414  goto fail;
1415  s->thread_context[i]->start_mb_y =
1416  (s->mb_height * (i) + nb_slices / 2) / nb_slices;
1417  s->thread_context[i]->end_mb_y =
1418  (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
1419  }
1420  } else {
1421  if (init_duplicate_context(s) < 0)
1422  goto fail;
1423  s->start_mb_y = 0;
1424  s->end_mb_y = s->mb_height;
1425  }
1426  s->slice_context_count = nb_slices;
1427  }
1428 
1429  return 0;
1430  fail:
1431  ff_MPV_common_end(s);
1432  return err;
1433 }
1434 
1435 /* init common structure for both encoder and decoder */
1437 {
1438  int i;
1439 
1440  if (s->slice_context_count > 1) {
1441  for (i = 0; i < s->slice_context_count; i++) {
1443  }
1444  for (i = 1; i < s->slice_context_count; i++) {
1445  av_freep(&s->thread_context[i]);
1446  }
1447  s->slice_context_count = 1;
1448  } else free_duplicate_context(s);
1449 
1451  s->parse_context.buffer_size = 0;
1452 
1455 
1456  if (s->picture) {
1457  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1459  ff_mpeg_unref_picture(s, &s->picture[i]);
1460  }
1461  }
1462  av_freep(&s->picture);
1469 
1470  free_context_frame(s);
1471 
1472  s->context_initialized = 0;
1473  s->last_picture_ptr =
1474  s->next_picture_ptr =
1476  s->linesize = s->uvlinesize = 0;
1477 }
1478 
1480  uint8_t static_store[2][2 * MAX_RUN + MAX_LEVEL + 3])
1481 {
1482  int8_t max_level[MAX_RUN + 1], max_run[MAX_LEVEL + 1];
1483  uint8_t index_run[MAX_RUN + 1];
1484  int last, run, level, start, end, i;
1485 
1486  /* If table is static, we can quit if rl->max_level[0] is not NULL */
1487  if (static_store && rl->max_level[0])
1488  return;
1489 
1490  /* compute max_level[], max_run[] and index_run[] */
1491  for (last = 0; last < 2; last++) {
1492  if (last == 0) {
1493  start = 0;
1494  end = rl->last;
1495  } else {
1496  start = rl->last;
1497  end = rl->n;
1498  }
1499 
1500  memset(max_level, 0, MAX_RUN + 1);
1501  memset(max_run, 0, MAX_LEVEL + 1);
1502  memset(index_run, rl->n, MAX_RUN + 1);
1503  for (i = start; i < end; i++) {
1504  run = rl->table_run[i];
1505  level = rl->table_level[i];
1506  if (index_run[run] == rl->n)
1507  index_run[run] = i;
1508  if (level > max_level[run])
1509  max_level[run] = level;
1510  if (run > max_run[level])
1511  max_run[level] = run;
1512  }
1513  if (static_store)
1514  rl->max_level[last] = static_store[last];
1515  else
1516  rl->max_level[last] = av_malloc(MAX_RUN + 1);
1517  memcpy(rl->max_level[last], max_level, MAX_RUN + 1);
1518  if (static_store)
1519  rl->max_run[last] = static_store[last] + MAX_RUN + 1;
1520  else
1521  rl->max_run[last] = av_malloc(MAX_LEVEL + 1);
1522  memcpy(rl->max_run[last], max_run, MAX_LEVEL + 1);
1523  if (static_store)
1524  rl->index_run[last] = static_store[last] + MAX_RUN + MAX_LEVEL + 2;
1525  else
1526  rl->index_run[last] = av_malloc(MAX_RUN + 1);
1527  memcpy(rl->index_run[last], index_run, MAX_RUN + 1);
1528  }
1529 }
1530 
1532 {
1533  int i, q;
1534 
1535  for (q = 0; q < 32; q++) {
1536  int qmul = q * 2;
1537  int qadd = (q - 1) | 1;
1538 
1539  if (q == 0) {
1540  qmul = 1;
1541  qadd = 0;
1542  }
1543  for (i = 0; i < rl->vlc.table_size; i++) {
1544  int code = rl->vlc.table[i][0];
1545  int len = rl->vlc.table[i][1];
1546  int level, run;
1547 
1548  if (len == 0) { // illegal code
1549  run = 66;
1550  level = MAX_LEVEL;
1551  } else if (len < 0) { // more bits needed
1552  run = 0;
1553  level = code;
1554  } else {
1555  if (code == rl->n) { // esc
1556  run = 66;
1557  level = 0;
1558  } else {
1559  run = rl->table_run[code] + 1;
1560  level = rl->table_level[code] * qmul + qadd;
1561  if (code >= rl->last) run += 192;
1562  }
1563  }
1564  rl->rl_vlc[q][i].len = len;
1565  rl->rl_vlc[q][i].level = level;
1566  rl->rl_vlc[q][i].run = run;
1567  }
1568  }
1569 }
1570 
1572 {
1573  int i;
1574 
1575  /* release non reference frames */
1576  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1577  if (!s->picture[i].reference)
1578  ff_mpeg_unref_picture(s, &s->picture[i]);
1579  }
1580 }
1581 
1582 static inline int pic_is_unused(MpegEncContext *s, Picture *pic)
1583 {
1584  if (pic->f.buf[0] == NULL)
1585  return 1;
1586  if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
1587  return 1;
1588  return 0;
1589 }
1590 
1591 static int find_unused_picture(MpegEncContext *s, int shared)
1592 {
1593  int i;
1594 
1595  if (shared) {
1596  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1597  if (s->picture[i].f.buf[0] == NULL)
1598  return i;
1599  }
1600  } else {
1601  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1602  if (pic_is_unused(s, &s->picture[i]))
1603  return i;
1604  }
1605  }
1606 
1607  return AVERROR_INVALIDDATA;
1608 }
1609 
1611 {
1612  int ret = find_unused_picture(s, shared);
1613 
1614  if (ret >= 0 && ret < MAX_PICTURE_COUNT) {
1615  if (s->picture[ret].needs_realloc) {
1616  s->picture[ret].needs_realloc = 0;
1617  ff_free_picture_tables(&s->picture[ret]);
1618  ff_mpeg_unref_picture(s, &s->picture[ret]);
1619  }
1620  }
1621  return ret;
1622 }
1623 
1629 {
1630  int i, ret;
1631  Picture *pic;
1632  s->mb_skipped = 0;
1633 
1634  /* mark & release old frames */
1635  if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
1637  s->last_picture_ptr->f.buf[0]) {
1639  }
1640 
1641  /* release forgotten pictures */
1642  /* if (mpeg124/h263) */
1643  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1644  if (&s->picture[i] != s->last_picture_ptr &&
1645  &s->picture[i] != s->next_picture_ptr &&
1646  s->picture[i].reference && !s->picture[i].needs_realloc) {
1647  if (!(avctx->active_thread_type & FF_THREAD_FRAME))
1648  av_log(avctx, AV_LOG_ERROR,
1649  "releasing zombie picture\n");
1650  ff_mpeg_unref_picture(s, &s->picture[i]);
1651  }
1652  }
1653 
1655 
1657 
1658  if (s->current_picture_ptr &&
1659  s->current_picture_ptr->f.buf[0] == NULL) {
1660  // we already have a unused image
1661  // (maybe it was set before reading the header)
1662  pic = s->current_picture_ptr;
1663  } else {
1664  i = ff_find_unused_picture(s, 0);
1665  if (i < 0) {
1666  av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1667  return i;
1668  }
1669  pic = &s->picture[i];
1670  }
1671 
1672  pic->reference = 0;
1673  if (!s->droppable) {
1674  if (s->pict_type != AV_PICTURE_TYPE_B)
1675  pic->reference = 3;
1676  }
1677 
1679 
1680  if (ff_alloc_picture(s, pic, 0) < 0)
1681  return -1;
1682 
1683  s->current_picture_ptr = pic;
1684  // FIXME use only the vars from current_pic
1686  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
1688  if (s->picture_structure != PICT_FRAME)
1691  }
1695 
1697  // if (s->flags && CODEC_FLAG_QSCALE)
1698  // s->current_picture_ptr->quality = s->new_picture_ptr->quality;
1700 
1701  if ((ret = ff_mpeg_ref_picture(s, &s->current_picture,
1702  s->current_picture_ptr)) < 0)
1703  return ret;
1704 
1705  if (s->pict_type != AV_PICTURE_TYPE_B) {
1707  if (!s->droppable)
1709  }
1710  av_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1715  s->pict_type, s->droppable);
1716 
1717  if ((s->last_picture_ptr == NULL ||
1718  s->last_picture_ptr->f.buf[0] == NULL) &&
1719  (s->pict_type != AV_PICTURE_TYPE_I ||
1720  s->picture_structure != PICT_FRAME)) {
1721  int h_chroma_shift, v_chroma_shift;
1723  &h_chroma_shift, &v_chroma_shift);
1724  if (s->pict_type != AV_PICTURE_TYPE_I)
1725  av_log(avctx, AV_LOG_ERROR,
1726  "warning: first frame is no keyframe\n");
1727  else if (s->picture_structure != PICT_FRAME)
1728  av_log(avctx, AV_LOG_INFO,
1729  "allocate dummy last picture for field based first keyframe\n");
1730 
1731  /* Allocate a dummy frame */
1732  i = ff_find_unused_picture(s, 0);
1733  if (i < 0) {
1734  av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1735  return i;
1736  }
1737  s->last_picture_ptr = &s->picture[i];
1738 
1739  s->last_picture_ptr->reference = 3;
1741 
1742  if (ff_alloc_picture(s, s->last_picture_ptr, 0) < 0) {
1743  s->last_picture_ptr = NULL;
1744  return -1;
1745  }
1746 
1747  memset(s->last_picture_ptr->f.data[0], 0,
1748  avctx->height * s->last_picture_ptr->f.linesize[0]);
1749  memset(s->last_picture_ptr->f.data[1], 0x80,
1750  (avctx->height >> v_chroma_shift) *
1751  s->last_picture_ptr->f.linesize[1]);
1752  memset(s->last_picture_ptr->f.data[2], 0x80,
1753  (avctx->height >> v_chroma_shift) *
1754  s->last_picture_ptr->f.linesize[2]);
1755 
1756  ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
1757  ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
1758  }
1759  if ((s->next_picture_ptr == NULL ||
1760  s->next_picture_ptr->f.buf[0] == NULL) &&
1761  s->pict_type == AV_PICTURE_TYPE_B) {
1762  /* Allocate a dummy frame */
1763  i = ff_find_unused_picture(s, 0);
1764  if (i < 0) {
1765  av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1766  return i;
1767  }
1768  s->next_picture_ptr = &s->picture[i];
1769 
1770  s->next_picture_ptr->reference = 3;
1772 
1773  if (ff_alloc_picture(s, s->next_picture_ptr, 0) < 0) {
1774  s->next_picture_ptr = NULL;
1775  return -1;
1776  }
1777  ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
1778  ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
1779  }
1780 
1781  if (s->last_picture_ptr) {
1783  if (s->last_picture_ptr->f.buf[0] &&
1784  (ret = ff_mpeg_ref_picture(s, &s->last_picture,
1785  s->last_picture_ptr)) < 0)
1786  return ret;
1787  }
1788  if (s->next_picture_ptr) {
1790  if (s->next_picture_ptr->f.buf[0] &&
1791  (ret = ff_mpeg_ref_picture(s, &s->next_picture,
1792  s->next_picture_ptr)) < 0)
1793  return ret;
1794  }
1795 
1796  if (s->pict_type != AV_PICTURE_TYPE_I &&
1797  !(s->last_picture_ptr && s->last_picture_ptr->f.buf[0])) {
1798  av_log(s, AV_LOG_ERROR,
1799  "Non-reference picture received and no reference available\n");
1800  return AVERROR_INVALIDDATA;
1801  }
1802 
1803  if (s->picture_structure!= PICT_FRAME) {
1804  int i;
1805  for (i = 0; i < 4; i++) {
1807  s->current_picture.f.data[i] +=
1808  s->current_picture.f.linesize[i];
1809  }
1810  s->current_picture.f.linesize[i] *= 2;
1811  s->last_picture.f.linesize[i] *= 2;
1812  s->next_picture.f.linesize[i] *= 2;
1813  }
1814  }
1815 
1816  s->err_recognition = avctx->err_recognition;
1817 
1818  /* set dequantizer, we can't do it during init as
1819  * it might change for mpeg4 and we can't do it in the header
1820  * decode as init is not called for mpeg4 there yet */
1821  if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1824  } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
1827  } else {
1830  }
1831 
1832 #if FF_API_XVMC
1834  if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1835  return ff_xvmc_field_start(s, avctx);
1837 #endif /* FF_API_XVMC */
1838 
1839  return 0;
1840 }
1841 
1842 /* called after a frame has been decoded. */
1844 {
1845 #if FF_API_XVMC
1847  /* redraw edges for the frame if decoding didn't complete */
1848  // just to make sure that all data is rendered.
1849  if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) {
1850  ff_xvmc_field_end(s);
1851  } else
1853 #endif /* FF_API_XVMC */
1854 
1855  emms_c();
1856 
1857  if (s->current_picture.reference)
1859 }
1860 
1865 {
1866  AVFrame *pict;
1867  if (s->avctx->hwaccel || !p || !p->mb_type)
1868  return;
1869  pict = &p->f;
1870 
1872  int x,y;
1873 
1874  av_log(s->avctx,AV_LOG_DEBUG,"New frame, type: ");
1875  switch (pict->pict_type) {
1876  case AV_PICTURE_TYPE_I:
1877  av_log(s->avctx,AV_LOG_DEBUG,"I\n");
1878  break;
1879  case AV_PICTURE_TYPE_P:
1880  av_log(s->avctx,AV_LOG_DEBUG,"P\n");
1881  break;
1882  case AV_PICTURE_TYPE_B:
1883  av_log(s->avctx,AV_LOG_DEBUG,"B\n");
1884  break;
1885  case AV_PICTURE_TYPE_S:
1886  av_log(s->avctx,AV_LOG_DEBUG,"S\n");
1887  break;
1888  case AV_PICTURE_TYPE_SI:
1889  av_log(s->avctx,AV_LOG_DEBUG,"SI\n");
1890  break;
1891  case AV_PICTURE_TYPE_SP:
1892  av_log(s->avctx,AV_LOG_DEBUG,"SP\n");
1893  break;
1894  }
1895  for (y = 0; y < s->mb_height; y++) {
1896  for (x = 0; x < s->mb_width; x++) {
1897  if (s->avctx->debug & FF_DEBUG_SKIP) {
1898  int count = s->mbskip_table[x + y * s->mb_stride];
1899  if (count > 9)
1900  count = 9;
1901  av_log(s->avctx, AV_LOG_DEBUG, "%1d", count);
1902  }
1903  if (s->avctx->debug & FF_DEBUG_QP) {
1904  av_log(s->avctx, AV_LOG_DEBUG, "%2d",
1905  p->qscale_table[x + y * s->mb_stride]);
1906  }
1907  if (s->avctx->debug & FF_DEBUG_MB_TYPE) {
1908  int mb_type = p->mb_type[x + y * s->mb_stride];
1909  // Type & MV direction
1910  if (IS_PCM(mb_type))
1911  av_log(s->avctx, AV_LOG_DEBUG, "P");
1912  else if (IS_INTRA(mb_type) && IS_ACPRED(mb_type))
1913  av_log(s->avctx, AV_LOG_DEBUG, "A");
1914  else if (IS_INTRA4x4(mb_type))
1915  av_log(s->avctx, AV_LOG_DEBUG, "i");
1916  else if (IS_INTRA16x16(mb_type))
1917  av_log(s->avctx, AV_LOG_DEBUG, "I");
1918  else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type))
1919  av_log(s->avctx, AV_LOG_DEBUG, "d");
1920  else if (IS_DIRECT(mb_type))
1921  av_log(s->avctx, AV_LOG_DEBUG, "D");
1922  else if (IS_GMC(mb_type) && IS_SKIP(mb_type))
1923  av_log(s->avctx, AV_LOG_DEBUG, "g");
1924  else if (IS_GMC(mb_type))
1925  av_log(s->avctx, AV_LOG_DEBUG, "G");
1926  else if (IS_SKIP(mb_type))
1927  av_log(s->avctx, AV_LOG_DEBUG, "S");
1928  else if (!USES_LIST(mb_type, 1))
1929  av_log(s->avctx, AV_LOG_DEBUG, ">");
1930  else if (!USES_LIST(mb_type, 0))
1931  av_log(s->avctx, AV_LOG_DEBUG, "<");
1932  else {
1933  assert(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
1934  av_log(s->avctx, AV_LOG_DEBUG, "X");
1935  }
1936 
1937  // segmentation
1938  if (IS_8X8(mb_type))
1939  av_log(s->avctx, AV_LOG_DEBUG, "+");
1940  else if (IS_16X8(mb_type))
1941  av_log(s->avctx, AV_LOG_DEBUG, "-");
1942  else if (IS_8X16(mb_type))
1943  av_log(s->avctx, AV_LOG_DEBUG, "|");
1944  else if (IS_INTRA(mb_type) || IS_16X16(mb_type))
1945  av_log(s->avctx, AV_LOG_DEBUG, " ");
1946  else
1947  av_log(s->avctx, AV_LOG_DEBUG, "?");
1948 
1949 
1950  if (IS_INTERLACED(mb_type))
1951  av_log(s->avctx, AV_LOG_DEBUG, "=");
1952  else
1953  av_log(s->avctx, AV_LOG_DEBUG, " ");
1954  }
1955  }
1956  av_log(s->avctx, AV_LOG_DEBUG, "\n");
1957  }
1958  }
1959 }
1960 
1965 {
1966  int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
1967  int my, off, i, mvs;
1968 
1969  if (s->picture_structure != PICT_FRAME || s->mcsel)
1970  goto unhandled;
1971 
1972  switch (s->mv_type) {
1973  case MV_TYPE_16X16:
1974  mvs = 1;
1975  break;
1976  case MV_TYPE_16X8:
1977  mvs = 2;
1978  break;
1979  case MV_TYPE_8X8:
1980  mvs = 4;
1981  break;
1982  default:
1983  goto unhandled;
1984  }
1985 
1986  for (i = 0; i < mvs; i++) {
1987  my = s->mv[dir][i][1]<<qpel_shift;
1988  my_max = FFMAX(my_max, my);
1989  my_min = FFMIN(my_min, my);
1990  }
1991 
1992  off = (FFMAX(-my_min, my_max) + 63) >> 6;
1993 
1994  return FFMIN(FFMAX(s->mb_y + off, 0), s->mb_height-1);
1995 unhandled:
1996  return s->mb_height-1;
1997 }
1998 
1999 /* put block[] to dest[] */
2000 static inline void put_dct(MpegEncContext *s,
2001  int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
2002 {
2003  s->dct_unquantize_intra(s, block, i, qscale);
2004  s->dsp.idct_put (dest, line_size, block);
2005 }
2006 
2007 /* add block[] to dest[] */
2008 static inline void add_dct(MpegEncContext *s,
2009  int16_t *block, int i, uint8_t *dest, int line_size)
2010 {
2011  if (s->block_last_index[i] >= 0) {
2012  s->dsp.idct_add (dest, line_size, block);
2013  }
2014 }
2015 
2016 static inline void add_dequant_dct(MpegEncContext *s,
2017  int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
2018 {
2019  if (s->block_last_index[i] >= 0) {
2020  s->dct_unquantize_inter(s, block, i, qscale);
2021 
2022  s->dsp.idct_add (dest, line_size, block);
2023  }
2024 }
2025 
2030 {
2031  int wrap = s->b8_stride;
2032  int xy = s->block_index[0];
2033 
2034  s->dc_val[0][xy ] =
2035  s->dc_val[0][xy + 1 ] =
2036  s->dc_val[0][xy + wrap] =
2037  s->dc_val[0][xy + 1 + wrap] = 1024;
2038  /* ac pred */
2039  memset(s->ac_val[0][xy ], 0, 32 * sizeof(int16_t));
2040  memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
2041  if (s->msmpeg4_version>=3) {
2042  s->coded_block[xy ] =
2043  s->coded_block[xy + 1 ] =
2044  s->coded_block[xy + wrap] =
2045  s->coded_block[xy + 1 + wrap] = 0;
2046  }
2047  /* chroma */
2048  wrap = s->mb_stride;
2049  xy = s->mb_x + s->mb_y * wrap;
2050  s->dc_val[1][xy] =
2051  s->dc_val[2][xy] = 1024;
2052  /* ac pred */
2053  memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
2054  memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
2055 
2056  s->mbintra_table[xy]= 0;
2057 }
2058 
2059 /* generic function called after a macroblock has been parsed by the
2060  decoder or after it has been encoded by the encoder.
2061 
2062  Important variables used:
2063  s->mb_intra : true if intra macroblock
2064  s->mv_dir : motion vector direction
2065  s->mv_type : motion vector type
2066  s->mv : motion vector
2067  s->interlaced_dct : true if interlaced dct used (mpeg2)
2068  */
2069 static av_always_inline
2071  int is_mpeg12)
2072 {
2073  const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
2074 
2075 #if FF_API_XVMC
2077  if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration){
2078  ff_xvmc_decode_mb(s);//xvmc uses pblocks
2079  return;
2080  }
2082 #endif /* FF_API_XVMC */
2083 
2084  if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
2085  /* print DCT coefficients */
2086  int i,j;
2087  av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
2088  for(i=0; i<6; i++){
2089  for(j=0; j<64; j++){
2090  av_log(s->avctx, AV_LOG_DEBUG, "%5d", block[i][s->dsp.idct_permutation[j]]);
2091  }
2092  av_log(s->avctx, AV_LOG_DEBUG, "\n");
2093  }
2094  }
2095 
2096  s->current_picture.qscale_table[mb_xy] = s->qscale;
2097 
2098  /* update DC predictors for P macroblocks */
2099  if (!s->mb_intra) {
2100  if (!is_mpeg12 && (s->h263_pred || s->h263_aic)) {
2101  if(s->mbintra_table[mb_xy])
2103  } else {
2104  s->last_dc[0] =
2105  s->last_dc[1] =
2106  s->last_dc[2] = 128 << s->intra_dc_precision;
2107  }
2108  }
2109  else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
2110  s->mbintra_table[mb_xy]=1;
2111 
2112  if ((s->flags&CODEC_FLAG_PSNR) || !(s->encoding && (s->intra_only || s->pict_type==AV_PICTURE_TYPE_B) && s->avctx->mb_decision != FF_MB_DECISION_RD)) { //FIXME precalc
2113  uint8_t *dest_y, *dest_cb, *dest_cr;
2114  int dct_linesize, dct_offset;
2115  op_pixels_func (*op_pix)[4];
2116  qpel_mc_func (*op_qpix)[16];
2117  const int linesize = s->current_picture.f.linesize[0]; //not s->linesize as this would be wrong for field pics
2118  const int uvlinesize = s->current_picture.f.linesize[1];
2119  const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band;
2120  const int block_size = 8;
2121 
2122  /* avoid copy if macroblock skipped in last frame too */
2123  /* skip only during decoding as we might trash the buffers during encoding a bit */
2124  if(!s->encoding){
2125  uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
2126 
2127  if (s->mb_skipped) {
2128  s->mb_skipped= 0;
2129  assert(s->pict_type!=AV_PICTURE_TYPE_I);
2130  *mbskip_ptr = 1;
2131  } else if(!s->current_picture.reference) {
2132  *mbskip_ptr = 1;
2133  } else{
2134  *mbskip_ptr = 0; /* not skipped */
2135  }
2136  }
2137 
2138  dct_linesize = linesize << s->interlaced_dct;
2139  dct_offset = s->interlaced_dct ? linesize : linesize * block_size;
2140 
2141  if(readable){
2142  dest_y= s->dest[0];
2143  dest_cb= s->dest[1];
2144  dest_cr= s->dest[2];
2145  }else{
2146  dest_y = s->b_scratchpad;
2147  dest_cb= s->b_scratchpad+16*linesize;
2148  dest_cr= s->b_scratchpad+32*linesize;
2149  }
2150 
2151  if (!s->mb_intra) {
2152  /* motion handling */
2153  /* decoding or more than one mb_type (MC was already done otherwise) */
2154  if(!s->encoding){
2155 
2157  if (s->mv_dir & MV_DIR_FORWARD) {
2160  0);
2161  }
2162  if (s->mv_dir & MV_DIR_BACKWARD) {
2165  0);
2166  }
2167  }
2168 
2169  op_qpix= s->me.qpel_put;
2170  if ((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
2171  op_pix = s->hdsp.put_pixels_tab;
2172  }else{
2173  op_pix = s->hdsp.put_no_rnd_pixels_tab;
2174  }
2175  if (s->mv_dir & MV_DIR_FORWARD) {
2176  ff_MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f.data, op_pix, op_qpix);
2177  op_pix = s->hdsp.avg_pixels_tab;
2178  op_qpix= s->me.qpel_avg;
2179  }
2180  if (s->mv_dir & MV_DIR_BACKWARD) {
2181  ff_MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f.data, op_pix, op_qpix);
2182  }
2183  }
2184 
2185  /* skip dequant / idct if we are really late ;) */
2186  if(s->avctx->skip_idct){
2189  || s->avctx->skip_idct >= AVDISCARD_ALL)
2190  goto skip_idct;
2191  }
2192 
2193  /* add dct residue */
2195  || (s->codec_id==AV_CODEC_ID_MPEG4 && !s->mpeg_quant))){
2196  add_dequant_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
2197  add_dequant_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
2198  add_dequant_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
2199  add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2200 
2201  if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2202  if (s->chroma_y_shift){
2203  add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2204  add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2205  }else{
2206  dct_linesize >>= 1;
2207  dct_offset >>=1;
2208  add_dequant_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
2209  add_dequant_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
2210  add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2211  add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2212  }
2213  }
2214  } else if(is_mpeg12 || (s->codec_id != AV_CODEC_ID_WMV2)){
2215  add_dct(s, block[0], 0, dest_y , dct_linesize);
2216  add_dct(s, block[1], 1, dest_y + block_size, dct_linesize);
2217  add_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize);
2218  add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
2219 
2220  if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2221  if(s->chroma_y_shift){//Chroma420
2222  add_dct(s, block[4], 4, dest_cb, uvlinesize);
2223  add_dct(s, block[5], 5, dest_cr, uvlinesize);
2224  }else{
2225  //chroma422
2226  dct_linesize = uvlinesize << s->interlaced_dct;
2227  dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize * 8;
2228 
2229  add_dct(s, block[4], 4, dest_cb, dct_linesize);
2230  add_dct(s, block[5], 5, dest_cr, dct_linesize);
2231  add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
2232  add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
2233  if(!s->chroma_x_shift){//Chroma444
2234  add_dct(s, block[8], 8, dest_cb+8, dct_linesize);
2235  add_dct(s, block[9], 9, dest_cr+8, dct_linesize);
2236  add_dct(s, block[10], 10, dest_cb+8+dct_offset, dct_linesize);
2237  add_dct(s, block[11], 11, dest_cr+8+dct_offset, dct_linesize);
2238  }
2239  }
2240  }//fi gray
2241  }
2243  ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
2244  }
2245  } else {
2246  /* dct only in intra block */
2248  put_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
2249  put_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
2250  put_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
2251  put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2252 
2253  if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2254  if(s->chroma_y_shift){
2255  put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2256  put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2257  }else{
2258  dct_offset >>=1;
2259  dct_linesize >>=1;
2260  put_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
2261  put_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
2262  put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2263  put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2264  }
2265  }
2266  }else{
2267  s->dsp.idct_put(dest_y , dct_linesize, block[0]);
2268  s->dsp.idct_put(dest_y + block_size, dct_linesize, block[1]);
2269  s->dsp.idct_put(dest_y + dct_offset , dct_linesize, block[2]);
2270  s->dsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
2271 
2272  if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2273  if(s->chroma_y_shift){
2274  s->dsp.idct_put(dest_cb, uvlinesize, block[4]);
2275  s->dsp.idct_put(dest_cr, uvlinesize, block[5]);
2276  }else{
2277 
2278  dct_linesize = uvlinesize << s->interlaced_dct;
2279  dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize * 8;
2280 
2281  s->dsp.idct_put(dest_cb, dct_linesize, block[4]);
2282  s->dsp.idct_put(dest_cr, dct_linesize, block[5]);
2283  s->dsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
2284  s->dsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
2285  if(!s->chroma_x_shift){//Chroma444
2286  s->dsp.idct_put(dest_cb + 8, dct_linesize, block[8]);
2287  s->dsp.idct_put(dest_cr + 8, dct_linesize, block[9]);
2288  s->dsp.idct_put(dest_cb + 8 + dct_offset, dct_linesize, block[10]);
2289  s->dsp.idct_put(dest_cr + 8 + dct_offset, dct_linesize, block[11]);
2290  }
2291  }
2292  }//gray
2293  }
2294  }
2295 skip_idct:
2296  if(!readable){
2297  s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y , linesize,16);
2298  s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
2299  s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize,16 >> s->chroma_y_shift);
2300  }
2301  }
2302 }
2303 
2304 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]){
2305 #if !CONFIG_SMALL
2306  if(s->out_format == FMT_MPEG1) {
2307  MPV_decode_mb_internal(s, block, 1);
2308  } else
2309 #endif
2310  MPV_decode_mb_internal(s, block, 0);
2311 }
2312 
2317  Picture *last, int y, int h, int picture_structure,
2318  int first_field, int low_delay)
2319 {
2320  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
2321  int vshift = desc->log2_chroma_h;
2322  const int field_pic = picture_structure != PICT_FRAME;
2323  if(field_pic){
2324  h <<= 1;
2325  y <<= 1;
2326  }
2327 
2328  h = FFMIN(h, avctx->height - y);
2329 
2330  if(field_pic && first_field && !(avctx->slice_flags&SLICE_FLAG_ALLOW_FIELD)) return;
2331 
2332  if (avctx->draw_horiz_band) {
2333  AVFrame *src;
2334  int offset[AV_NUM_DATA_POINTERS];
2335  int i;
2336 
2337  if(cur->f.pict_type == AV_PICTURE_TYPE_B || low_delay ||
2339  src = &cur->f;
2340  else if (last)
2341  src = &last->f;
2342  else
2343  return;
2344 
2345  if (cur->f.pict_type == AV_PICTURE_TYPE_B &&
2346  picture_structure == PICT_FRAME &&
2347  avctx->codec_id != AV_CODEC_ID_SVQ3) {
2348  for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
2349  offset[i] = 0;
2350  }else{
2351  offset[0]= y * src->linesize[0];
2352  offset[1]=
2353  offset[2]= (y >> vshift) * src->linesize[1];
2354  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
2355  offset[i] = 0;
2356  }
2357 
2358  emms_c();
2359 
2360  avctx->draw_horiz_band(avctx, src, offset,
2361  y, picture_structure, h);
2362  }
2363 }
2364 
2366 {
2368  &s->last_picture, y, h, s->picture_structure,
2369  s->first_field, s->low_delay);
2370 }
2371 
2372 void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
2373  const int linesize = s->current_picture.f.linesize[0]; //not s->linesize as this would be wrong for field pics
2374  const int uvlinesize = s->current_picture.f.linesize[1];
2375  const int mb_size= 4;
2376 
2377  s->block_index[0]= s->b8_stride*(s->mb_y*2 ) - 2 + s->mb_x*2;
2378  s->block_index[1]= s->b8_stride*(s->mb_y*2 ) - 1 + s->mb_x*2;
2379  s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
2380  s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
2381  s->block_index[4]= s->mb_stride*(s->mb_y + 1) + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
2382  s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
2383  //block_index is not used by mpeg2, so it is not affected by chroma_format
2384 
2385  s->dest[0] = s->current_picture.f.data[0] + ((s->mb_x - 1) << mb_size);
2386  s->dest[1] = s->current_picture.f.data[1] + ((s->mb_x - 1) << (mb_size - s->chroma_x_shift));
2387  s->dest[2] = s->current_picture.f.data[2] + ((s->mb_x - 1) << (mb_size - s->chroma_x_shift));
2388 
2390  {
2391  if(s->picture_structure==PICT_FRAME){
2392  s->dest[0] += s->mb_y * linesize << mb_size;
2393  s->dest[1] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
2394  s->dest[2] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
2395  }else{
2396  s->dest[0] += (s->mb_y>>1) * linesize << mb_size;
2397  s->dest[1] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
2398  s->dest[2] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
2399  assert((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
2400  }
2401  }
2402 }
2403 
2412 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last)
2413 {
2414  int i;
2415  int16_t temp[64];
2416 
2417  if(last<=0) return;
2418  //if(permutation[1]==1) return; //FIXME it is ok but not clean and might fail for some permutations
2419 
2420  for(i=0; i<=last; i++){
2421  const int j= scantable[i];
2422  temp[j]= block[j];
2423  block[j]=0;
2424  }
2425 
2426  for(i=0; i<=last; i++){
2427  const int j= scantable[i];
2428  const int perm_j= permutation[j];
2429  block[perm_j]= temp[j];
2430  }
2431 }
2432 
2434  int i;
2435  MpegEncContext *s = avctx->priv_data;
2436 
2437  if(s==NULL || s->picture==NULL)
2438  return;
2439 
2440  for (i = 0; i < MAX_PICTURE_COUNT; i++)
2441  ff_mpeg_unref_picture(s, &s->picture[i]);
2443 
2447 
2448  s->mb_x= s->mb_y= 0;
2449 
2450  s->parse_context.state= -1;
2452  s->parse_context.overread= 0;
2454  s->parse_context.index= 0;
2455  s->parse_context.last_index= 0;
2456  s->bitstream_buffer_size=0;
2457  s->pp_time=0;
2458 }
2459 
2463 void ff_set_qscale(MpegEncContext * s, int qscale)
2464 {
2465  if (qscale < 1)
2466  qscale = 1;
2467  else if (qscale > 31)
2468  qscale = 31;
2469 
2470  s->qscale = qscale;
2471  s->chroma_qscale= s->chroma_qscale_table[qscale];
2472 
2473  s->y_dc_scale= s->y_dc_scale_table[ qscale ];
2475 }
2476 
2478 {
2481 }
2482 
2483 #if CONFIG_ERROR_RESILIENCE
2485 {
2486  ERContext *er = &s->er;
2487 
2488  er->cur_pic = s->current_picture_ptr;
2489  er->last_pic = s->last_picture_ptr;
2490  er->next_pic = s->next_picture_ptr;
2491 
2492  er->pp_time = s->pp_time;
2493  er->pb_time = s->pb_time;
2494  er->quarter_sample = s->quarter_sample;
2496 
2497  ff_er_frame_start(er);
2498 }
2499 #endif /* CONFIG_ERROR_RESILIENCE */