git.sesse.net Git - ffmpeg/blob - libavcodec/mpegvideo.c

   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 FFmpeg.
   9  *
  10  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 /**
  26  * @file
  27  * The simplest mpeg encoder (well, it was the simplest!).
  28  */
  29
  30 #include "libavutil/attributes.h"
  31 #include "libavutil/avassert.h"
  32 #include "libavutil/imgutils.h"
  33 #include "libavutil/internal.h"
  34 #include "libavutil/motion_vector.h"
  35 #include "libavutil/timer.h"
  36 #include "avcodec.h"
  37 #include "blockdsp.h"
  38 #include "h264chroma.h"
  39 #include "idctdsp.h"
  40 #include "internal.h"
  41 #include "mathops.h"
  42 #include "mpeg_er.h"
  43 #include "mpegutils.h"
  44 #include "mpegvideo.h"
  45 #include "mpegvideodata.h"
  46 #include "mjpegenc.h"
  47 #include "msmpeg4.h"
  48 #include "qpeldsp.h"
  49 #include "thread.h"
  50 #include "wmv2.h"
  51 #include <limits.h>
  52
  53 static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
  54                                    int16_t *block, int n, int qscale)
  55 {
  56     int i, level, nCoeffs;
  57     const uint16_t *quant_matrix;
  58
  59     nCoeffs= s->block_last_index[n];
  60
  61     block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
  62     /* XXX: only MPEG-1 */
  63     quant_matrix = s->intra_matrix;
  64     for(i=1;i<=nCoeffs;i++) {
  65         int j= s->intra_scantable.permutated[i];
  66         level = block[j];
  67         if (level) {
  68             if (level < 0) {
  69                 level = -level;
  70                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
  71                 level = (level - 1) | 1;
  72                 level = -level;
  73             } else {
  74                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
  75                 level = (level - 1) | 1;
  76             }
  77             block[j] = level;
  78         }
  79     }
  80 }
  81
  82 static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
  83                                    int16_t *block, int n, int qscale)
  84 {
  85     int i, level, nCoeffs;
  86     const uint16_t *quant_matrix;
  87
  88     nCoeffs= s->block_last_index[n];
  89
  90     quant_matrix = s->inter_matrix;
  91     for(i=0; i<=nCoeffs; i++) {
  92         int j= s->intra_scantable.permutated[i];
  93         level = block[j];
  94         if (level) {
  95             if (level < 0) {
  96                 level = -level;
  97                 level = (((level << 1) + 1) * qscale *
  98                          ((int) (quant_matrix[j]))) >> 4;
  99                 level = (level - 1) | 1;
 100                 level = -level;
 101             } else {
 102                 level = (((level << 1) + 1) * qscale *
 103                          ((int) (quant_matrix[j]))) >> 4;
 104                 level = (level - 1) | 1;
 105             }
 106             block[j] = level;
 107         }
 108     }
 109 }
 110
 111 static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
 112                                    int16_t *block, int n, int qscale)
 113 {
 114     int i, level, nCoeffs;
 115     const uint16_t *quant_matrix;
 116
 117     if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
 118     else                 qscale <<= 1;
 119
 120     if(s->alternate_scan) nCoeffs= 63;
 121     else nCoeffs= s->block_last_index[n];
 122
 123     block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
 124     quant_matrix = s->intra_matrix;
 125     for(i=1;i<=nCoeffs;i++) {
 126         int j= s->intra_scantable.permutated[i];
 127         level = block[j];
 128         if (level) {
 129             if (level < 0) {
 130                 level = -level;
 131                 level = (int)(level * qscale * quant_matrix[j]) >> 4;
 132                 level = -level;
 133             } else {
 134                 level = (int)(level * qscale * quant_matrix[j]) >> 4;
 135             }
 136             block[j] = level;
 137         }
 138     }
 139 }
 140
 141 static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
 142                                    int16_t *block, int n, int qscale)
 143 {
 144     int i, level, nCoeffs;
 145     const uint16_t *quant_matrix;
 146     int sum=-1;
 147
 148     if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
 149     else                 qscale <<= 1;
 150
 151     if(s->alternate_scan) nCoeffs= 63;
 152     else nCoeffs= s->block_last_index[n];
 153
 154     block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
 155     sum += block[0];
 156     quant_matrix = s->intra_matrix;
 157     for(i=1;i<=nCoeffs;i++) {
 158         int j= s->intra_scantable.permutated[i];
 159         level = block[j];
 160         if (level) {
 161             if (level < 0) {
 162                 level = -level;
 163                 level = (int)(level * qscale * quant_matrix[j]) >> 4;
 164                 level = -level;
 165             } else {
 166                 level = (int)(level * qscale * quant_matrix[j]) >> 4;
 167             }
 168             block[j] = level;
 169             sum+=level;
 170         }
 171     }
 172     block[63]^=sum&1;
 173 }
 174
 175 static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
 176                                    int16_t *block, int n, int qscale)
 177 {
 178     int i, level, nCoeffs;
 179     const uint16_t *quant_matrix;
 180     int sum=-1;
 181
 182     if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
 183     else                 qscale <<= 1;
 184
 185     if(s->alternate_scan) nCoeffs= 63;
 186     else nCoeffs= s->block_last_index[n];
 187
 188     quant_matrix = s->inter_matrix;
 189     for(i=0; i<=nCoeffs; i++) {
 190         int j= s->intra_scantable.permutated[i];
 191         level = block[j];
 192         if (level) {
 193             if (level < 0) {
 194                 level = -level;
 195                 level = (((level << 1) + 1) * qscale *
 196                          ((int) (quant_matrix[j]))) >> 5;
 197                 level = -level;
 198             } else {
 199                 level = (((level << 1) + 1) * qscale *
 200                          ((int) (quant_matrix[j]))) >> 5;
 201             }
 202             block[j] = level;
 203             sum+=level;
 204         }
 205     }
 206     block[63]^=sum&1;
 207 }
 208
 209 static void dct_unquantize_h263_intra_c(MpegEncContext *s,
 210                                   int16_t *block, int n, int qscale)
 211 {
 212     int i, level, qmul, qadd;
 213     int nCoeffs;
 214
 215     av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
 216
 217     qmul = qscale << 1;
 218
 219     if (!s->h263_aic) {
 220         block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
 221         qadd = (qscale - 1) | 1;
 222     }else{
 223         qadd = 0;
 224     }
 225     if(s->ac_pred)
 226         nCoeffs=63;
 227     else
 228         nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
 229
 230     for(i=1; i<=nCoeffs; i++) {
 231         level = block[i];
 232         if (level) {
 233             if (level < 0) {
 234                 level = level * qmul - qadd;
 235             } else {
 236                 level = level * qmul + qadd;
 237             }
 238             block[i] = level;
 239         }
 240     }
 241 }
 242
 243 static void dct_unquantize_h263_inter_c(MpegEncContext *s,
 244                                   int16_t *block, int n, int qscale)
 245 {
 246     int i, level, qmul, qadd;
 247     int nCoeffs;
 248
 249     av_assert2(s->block_last_index[n]>=0);
 250
 251     qadd = (qscale - 1) | 1;
 252     qmul = qscale << 1;
 253
 254     nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
 255
 256     for(i=0; i<=nCoeffs; i++) {
 257         level = block[i];
 258         if (level) {
 259             if (level < 0) {
 260                 level = level * qmul - qadd;
 261             } else {
 262                 level = level * qmul + qadd;
 263             }
 264             block[i] = level;
 265         }
 266     }
 267 }
 268
 269
 270 static void gray16(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
 271 {
 272     while(h--)
 273         memset(dst + h*linesize, 128, 16);
 274 }
 275
 276 static void gray8(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
 277 {
 278     while(h--)
 279         memset(dst + h*linesize, 128, 8);
 280 }
 281
 282 /* init common dct for both encoder and decoder */
 283 static av_cold int dct_init(MpegEncContext *s)
 284 {
 285     ff_blockdsp_init(&s->bdsp, s->avctx);
 286     ff_h264chroma_init(&s->h264chroma, 8); //for lowres
 287     ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
 288     ff_mpegvideodsp_init(&s->mdsp);
 289     ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
 290
 291     if (s->avctx->debug & FF_DEBUG_NOMC) {
 292         int i;
 293         for (i=0; i<4; i++) {
 294             s->hdsp.avg_pixels_tab[0][i] = gray16;
 295             s->hdsp.put_pixels_tab[0][i] = gray16;
 296             s->hdsp.put_no_rnd_pixels_tab[0][i] = gray16;
 297
 298             s->hdsp.avg_pixels_tab[1][i] = gray8;
 299             s->hdsp.put_pixels_tab[1][i] = gray8;
 300             s->hdsp.put_no_rnd_pixels_tab[1][i] = gray8;
 301         }
 302     }
 303
 304     s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_c;
 305     s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_c;
 306     s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_c;
 307     s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_c;
 308     s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_c;
 309     if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)
 310         s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
 311     s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
 312
 313     if (HAVE_INTRINSICS_NEON)
 314         ff_mpv_common_init_neon(s);
 315
 316     if (ARCH_ALPHA)
 317         ff_mpv_common_init_axp(s);
 318     if (ARCH_ARM)
 319         ff_mpv_common_init_arm(s);
 320     if (ARCH_PPC)
 321         ff_mpv_common_init_ppc(s);
 322     if (ARCH_X86)
 323         ff_mpv_common_init_x86(s);
 324     if (ARCH_MIPS)
 325         ff_mpv_common_init_mips(s);
 326
 327     return 0;
 328 }
 329
 330 av_cold void ff_mpv_idct_init(MpegEncContext *s)
 331 {
 332     if (s->codec_id == AV_CODEC_ID_MPEG4)
 333         s->idsp.mpeg4_studio_profile = s->studio_profile;
 334     ff_idctdsp_init(&s->idsp, s->avctx);
 335
 336     /* load & permutate scantables
 337      * note: only wmv uses different ones
 338      */
 339     if (s->alternate_scan) {
 340         ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
 341         ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
 342     } else {
 343         ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
 344         ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
 345     }
 346     ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
 347     ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
 348 }
 349
 350 static int alloc_picture(MpegEncContext *s, Picture *pic, int shared)
 351 {
 352     return ff_alloc_picture(s->avctx, pic, &s->me, &s->sc, shared, 0,
 353                             s->chroma_x_shift, s->chroma_y_shift, s->out_format,
 354                             s->mb_stride, s->mb_width, s->mb_height, s->b8_stride,
 355                             &s->linesize, &s->uvlinesize);
 356 }
 357
 358 static int init_duplicate_context(MpegEncContext *s)
 359 {
 360     int y_size = s->b8_stride * (2 * s->mb_height + 1);
 361     int c_size = s->mb_stride * (s->mb_height + 1);
 362     int yc_size = y_size + 2 * c_size;
 363     int i;
 364
 365     if (s->mb_height & 1)
 366         yc_size += 2*s->b8_stride + 2*s->mb_stride;
 367
 368     s->sc.edge_emu_buffer =
 369     s->me.scratchpad   =
 370     s->me.temp         =
 371     s->sc.rd_scratchpad   =
 372     s->sc.b_scratchpad    =
 373     s->sc.obmc_scratchpad = NULL;
 374
 375     if (s->encoding) {
 376         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.map,
 377                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 378         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.score_map,
 379                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 380         if (s->noise_reduction) {
 381             FF_ALLOCZ_OR_GOTO(s->avctx, s->dct_error_sum,
 382                               2 * 64 * sizeof(int), fail)
 383         }
 384     }
 385     FF_ALLOCZ_OR_GOTO(s->avctx, s->blocks, 64 * 12 * 2 * sizeof(int16_t), fail)
 386     s->block = s->blocks[0];
 387
 388     for (i = 0; i < 12; i++) {
 389         s->pblocks[i] = &s->block[i];
 390     }
 391
 392     FF_ALLOCZ_OR_GOTO(s->avctx, s->block32, sizeof(*s->block32), fail)
 393     s->dpcm_direction = 0;
 394     FF_ALLOCZ_OR_GOTO(s->avctx, s->dpcm_macroblock, sizeof(*s->dpcm_macroblock), fail)
 395
 396     if (s->avctx->codec_tag == AV_RL32("VCR2")) {
 397         // exchange uv
 398         FFSWAP(void *, s->pblocks[4], s->pblocks[5]);
 399     }
 400
 401     if (s->out_format == FMT_H263) {
 402         /* ac values */
 403         FF_ALLOCZ_OR_GOTO(s->avctx, s->ac_val_base,
 404                           yc_size * sizeof(int16_t) * 16, fail);
 405         s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
 406         s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
 407         s->ac_val[2] = s->ac_val[1] + c_size;
 408     }
 409
 410     return 0;
 411 fail:
 412     return -1; // free() through ff_mpv_common_end()
 413 }
 414
 415 static void free_duplicate_context(MpegEncContext *s)
 416 {
 417     if (!s)
 418         return;
 419
 420     av_freep(&s->sc.edge_emu_buffer);
 421     av_freep(&s->me.scratchpad);
 422     s->me.temp =
 423     s->sc.rd_scratchpad =
 424     s->sc.b_scratchpad =
 425     s->sc.obmc_scratchpad = NULL;
 426
 427     av_freep(&s->dct_error_sum);
 428     av_freep(&s->me.map);
 429     av_freep(&s->me.score_map);
 430     av_freep(&s->blocks);
 431     av_freep(&s->block32);
 432     av_freep(&s->dpcm_macroblock);
 433     av_freep(&s->ac_val_base);
 434     s->block = NULL;
 435 }
 436
 437 static void backup_duplicate_context(MpegEncContext *bak, MpegEncContext *src)
 438 {
 439 #define COPY(a) bak->a = src->a
 440     COPY(sc.edge_emu_buffer);
 441     COPY(me.scratchpad);
 442     COPY(me.temp);
 443     COPY(sc.rd_scratchpad);
 444     COPY(sc.b_scratchpad);
 445     COPY(sc.obmc_scratchpad);
 446     COPY(me.map);
 447     COPY(me.score_map);
 448     COPY(blocks);
 449     COPY(block);
 450     COPY(block32);
 451     COPY(dpcm_macroblock);
 452     COPY(dpcm_direction);
 453     COPY(start_mb_y);
 454     COPY(end_mb_y);
 455     COPY(me.map_generation);
 456     COPY(pb);
 457     COPY(dct_error_sum);
 458     COPY(dct_count[0]);
 459     COPY(dct_count[1]);
 460     COPY(ac_val_base);
 461     COPY(ac_val[0]);
 462     COPY(ac_val[1]);
 463     COPY(ac_val[2]);
 464 #undef COPY
 465 }
 466
 467 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
 468 {
 469     MpegEncContext bak;
 470     int i, ret;
 471     // FIXME copy only needed parts
 472     // START_TIMER
 473     backup_duplicate_context(&bak, dst);
 474     memcpy(dst, src, sizeof(MpegEncContext));
 475     backup_duplicate_context(dst, &bak);
 476     for (i = 0; i < 12; i++) {
 477         dst->pblocks[i] = &dst->block[i];
 478     }
 479     if (dst->avctx->codec_tag == AV_RL32("VCR2")) {
 480         // exchange uv
 481         FFSWAP(void *, dst->pblocks[4], dst->pblocks[5]);
 482     }
 483     if (!dst->sc.edge_emu_buffer &&
 484         (ret = ff_mpeg_framesize_alloc(dst->avctx, &dst->me,
 485                                        &dst->sc, dst->linesize)) < 0) {
 486         av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
 487                "scratch buffers.\n");
 488         return ret;
 489     }
 490     // STOP_TIMER("update_duplicate_context")
 491     // about 10k cycles / 0.01 sec for  1000frames on 1ghz with 2 threads
 492     return 0;
 493 }
 494
 495 int ff_mpeg_update_thread_context(AVCodecContext *dst,
 496                                   const AVCodecContext *src)
 497 {
 498     int i, ret;
 499     MpegEncContext *s = dst->priv_data, *s1 = src->priv_data;
 500
 501     if (dst == src)
 502         return 0;
 503
 504     av_assert0(s != s1);
 505
 506     // FIXME can parameters change on I-frames?
 507     // in that case dst may need a reinit
 508     if (!s->context_initialized) {
 509         int err;
 510         memcpy(s, s1, sizeof(MpegEncContext));
 511
 512         s->avctx                 = dst;
 513         s->bitstream_buffer      = NULL;
 514         s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0;
 515
 516         if (s1->context_initialized){
 517 //             s->picture_range_start  += MAX_PICTURE_COUNT;
 518 //             s->picture_range_end    += MAX_PICTURE_COUNT;
 519             ff_mpv_idct_init(s);
 520             if((err = ff_mpv_common_init(s)) < 0){
 521                 memset(s, 0, sizeof(MpegEncContext));
 522                 s->avctx = dst;
 523                 return err;
 524             }
 525         }
 526     }
 527
 528     if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
 529         s->context_reinit = 0;
 530         s->height = s1->height;
 531         s->width  = s1->width;
 532         if ((ret = ff_mpv_common_frame_size_change(s)) < 0)
 533             return ret;
 534     }
 535
 536     s->avctx->coded_height  = s1->avctx->coded_height;
 537     s->avctx->coded_width   = s1->avctx->coded_width;
 538     s->avctx->width         = s1->avctx->width;
 539     s->avctx->height        = s1->avctx->height;
 540
 541     s->coded_picture_number = s1->coded_picture_number;
 542     s->picture_number       = s1->picture_number;
 543
 544     av_assert0(!s->picture || s->picture != s1->picture);
 545     if(s->picture)
 546     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 547         ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
 548         if (s1->picture && s1->picture[i].f->buf[0] &&
 549             (ret = ff_mpeg_ref_picture(s->avctx, &s->picture[i], &s1->picture[i])) < 0)
 550             return ret;
 551     }
 552
 553 #define UPDATE_PICTURE(pic)\
 554 do {\
 555     ff_mpeg_unref_picture(s->avctx, &s->pic);\
 556     if (s1->pic.f && s1->pic.f->buf[0])\
 557         ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
 558     else\
 559         ret = ff_update_picture_tables(&s->pic, &s1->pic);\
 560     if (ret < 0)\
 561         return ret;\
 562 } while (0)
 563
 564     UPDATE_PICTURE(current_picture);
 565     UPDATE_PICTURE(last_picture);
 566     UPDATE_PICTURE(next_picture);
 567
 568 #define REBASE_PICTURE(pic, new_ctx, old_ctx)                                 \
 569     ((pic && pic >= old_ctx->picture &&                                       \
 570       pic < old_ctx->picture + MAX_PICTURE_COUNT) ?                           \
 571         &new_ctx->picture[pic - old_ctx->picture] : NULL)
 572
 573     s->last_picture_ptr    = REBASE_PICTURE(s1->last_picture_ptr,    s, s1);
 574     s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1);
 575     s->next_picture_ptr    = REBASE_PICTURE(s1->next_picture_ptr,    s, s1);
 576
 577     // Error/bug resilience
 578     s->next_p_frame_damaged = s1->next_p_frame_damaged;
 579     s->workaround_bugs      = s1->workaround_bugs;
 580     s->padding_bug_score    = s1->padding_bug_score;
 581
 582     // MPEG-4 timing info
 583     memcpy(&s->last_time_base, &s1->last_time_base,
 584            (char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
 585            (char *) &s1->last_time_base);
 586
 587     // B-frame info
 588     s->max_b_frames = s1->max_b_frames;
 589     s->low_delay    = s1->low_delay;
 590     s->droppable    = s1->droppable;
 591
 592     // DivX handling (doesn't work)
 593     s->divx_packed  = s1->divx_packed;
 594
 595     if (s1->bitstream_buffer) {
 596         if (s1->bitstream_buffer_size +
 597             AV_INPUT_BUFFER_PADDING_SIZE > s->allocated_bitstream_buffer_size) {
 598             av_fast_malloc(&s->bitstream_buffer,
 599                            &s->allocated_bitstream_buffer_size,
 600                            s1->allocated_bitstream_buffer_size);
 601             if (!s->bitstream_buffer) {
 602                 s->bitstream_buffer_size = 0;
 603                 return AVERROR(ENOMEM);
 604             }
 605         }
 606         s->bitstream_buffer_size = s1->bitstream_buffer_size;
 607         memcpy(s->bitstream_buffer, s1->bitstream_buffer,
 608                s1->bitstream_buffer_size);
 609         memset(s->bitstream_buffer + s->bitstream_buffer_size, 0,
 610                AV_INPUT_BUFFER_PADDING_SIZE);
 611     }
 612
 613     // linesize-dependent scratch buffer allocation
 614     if (!s->sc.edge_emu_buffer)
 615         if (s1->linesize) {
 616             if (ff_mpeg_framesize_alloc(s->avctx, &s->me,
 617                                         &s->sc, s1->linesize) < 0) {
 618                 av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
 619                        "scratch buffers.\n");
 620                 return AVERROR(ENOMEM);
 621             }
 622         } else {
 623             av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not "
 624                    "be allocated due to unknown size.\n");
 625         }
 626
 627     // MPEG-2/interlacing info
 628     memcpy(&s->progressive_sequence, &s1->progressive_sequence,
 629            (char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
 630
 631     if (!s1->first_field) {
 632         s->last_pict_type = s1->pict_type;
 633         if (s1->current_picture_ptr)
 634             s->last_lambda_for[s1->pict_type] = s1->current_picture_ptr->f->quality;
 635     }
 636
 637     return 0;
 638 }
 639
 640 /**
 641  * Set the given MpegEncContext to common defaults
 642  * (same for encoding and decoding).
 643  * The changed fields will not depend upon the
 644  * prior state of the MpegEncContext.
 645  */
 646 void ff_mpv_common_defaults(MpegEncContext *s)
 647 {
 648     s->y_dc_scale_table      =
 649     s->c_dc_scale_table      = ff_mpeg1_dc_scale_table;
 650     s->chroma_qscale_table   = ff_default_chroma_qscale_table;
 651     s->progressive_frame     = 1;
 652     s->progressive_sequence  = 1;
 653     s->picture_structure     = PICT_FRAME;
 654
 655     s->coded_picture_number  = 0;
 656     s->picture_number        = 0;
 657
 658     s->f_code                = 1;
 659     s->b_code                = 1;
 660
 661     s->slice_context_count   = 1;
 662 }
 663
 664 /**
 665  * Set the given MpegEncContext to defaults for decoding.
 666  * the changed fields will not depend upon
 667  * the prior state of the MpegEncContext.
 668  */
 669 void ff_mpv_decode_defaults(MpegEncContext *s)
 670 {
 671     ff_mpv_common_defaults(s);
 672 }
 673
 674 void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
 675 {
 676     s->avctx           = avctx;
 677     s->width           = avctx->coded_width;
 678     s->height          = avctx->coded_height;
 679     s->codec_id        = avctx->codec->id;
 680     s->workaround_bugs = avctx->workaround_bugs;
 681
 682     /* convert fourcc to upper case */
 683     s->codec_tag          = avpriv_toupper4(avctx->codec_tag);
 684 }
 685
 686 /**
 687  * Initialize and allocates MpegEncContext fields dependent on the resolution.
 688  */
 689 static int init_context_frame(MpegEncContext *s)
 690 {
 691     int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;
 692
 693     s->mb_width   = (s->width + 15) / 16;
 694     s->mb_stride  = s->mb_width + 1;
 695     s->b8_stride  = s->mb_width * 2 + 1;
 696     mb_array_size = s->mb_height * s->mb_stride;
 697     mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
 698
 699     /* set default edge pos, will be overridden
 700      * in decode_header if needed */
 701     s->h_edge_pos = s->mb_width * 16;
 702     s->v_edge_pos = s->mb_height * 16;
 703
 704     s->mb_num     = s->mb_width * s->mb_height;
 705
 706     s->block_wrap[0] =
 707     s->block_wrap[1] =
 708     s->block_wrap[2] =
 709     s->block_wrap[3] = s->b8_stride;
 710     s->block_wrap[4] =
 711     s->block_wrap[5] = s->mb_stride;
 712
 713     y_size  = s->b8_stride * (2 * s->mb_height + 1);
 714     c_size  = s->mb_stride * (s->mb_height + 1);
 715     yc_size = y_size + 2   * c_size;
 716
 717     if (s->mb_height & 1)
 718         yc_size += 2*s->b8_stride + 2*s->mb_stride;
 719
 720     FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
 721                       fail); // error resilience code looks cleaner with this
 722     for (y = 0; y < s->mb_height; y++)
 723         for (x = 0; x < s->mb_width; x++)
 724             s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
 725
 726     s->mb_index2xy[s->mb_height * s->mb_width] = (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
 727
 728     if (s->encoding) {
 729         /* Allocate MV tables */
 730         FF_ALLOCZ_OR_GOTO(s->avctx, s->p_mv_table_base,                 mv_table_size * 2 * sizeof(int16_t), fail)
 731         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_forw_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
 732         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_back_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
 733         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_forw_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
 734         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_back_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
 735         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_direct_mv_table_base,          mv_table_size * 2 * sizeof(int16_t), fail)
 736         s->p_mv_table            = s->p_mv_table_base + s->mb_stride + 1;
 737         s->b_forw_mv_table       = s->b_forw_mv_table_base + s->mb_stride + 1;
 738         s->b_back_mv_table       = s->b_back_mv_table_base + s->mb_stride + 1;
 739         s->b_bidir_forw_mv_table = s->b_bidir_forw_mv_table_base + s->mb_stride + 1;
 740         s->b_bidir_back_mv_table = s->b_bidir_back_mv_table_base + s->mb_stride + 1;
 741         s->b_direct_mv_table     = s->b_direct_mv_table_base + s->mb_stride + 1;
 742
 743         /* Allocate MB type table */
 744         FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_type, mb_array_size * sizeof(uint16_t), fail) // needed for encoding
 745
 746         FF_ALLOCZ_OR_GOTO(s->avctx, s->lambda_table, mb_array_size * sizeof(int), fail)
 747
 748         FF_ALLOC_OR_GOTO(s->avctx, s->cplx_tab,
 749                          mb_array_size * sizeof(float), fail);
 750         FF_ALLOC_OR_GOTO(s->avctx, s->bits_tab,
 751                          mb_array_size * sizeof(float), fail);
 752
 753     }
 754
 755     if (s->codec_id == AV_CODEC_ID_MPEG4 ||
 756         (s->avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)) {
 757         /* interlaced direct mode decoding tables */
 758         for (i = 0; i < 2; i++) {
 759             int j, k;
 760             for (j = 0; j < 2; j++) {
 761                 for (k = 0; k < 2; k++) {
 762                     FF_ALLOCZ_OR_GOTO(s->avctx,
 763                                       s->b_field_mv_table_base[i][j][k],
 764                                       mv_table_size * 2 * sizeof(int16_t),
 765                                       fail);
 766                     s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] +
 767                                                    s->mb_stride + 1;
 768                 }
 769                 FF_ALLOCZ_OR_GOTO(s->avctx, s->b_field_select_table [i][j], mb_array_size * 2 * sizeof(uint8_t), fail)
 770                 FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_mv_table_base[i][j], mv_table_size * 2 * sizeof(int16_t), fail)
 771                 s->p_field_mv_table[i][j] = s->p_field_mv_table_base[i][j] + s->mb_stride + 1;
 772             }
 773             FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_select_table[i], mb_array_size * 2 * sizeof(uint8_t), fail)
 774         }
 775     }
 776     if (s->out_format == FMT_H263) {
 777         /* cbp values */
 778         FF_ALLOCZ_OR_GOTO(s->avctx, s->coded_block_base, y_size + (s->mb_height&1)*2*s->b8_stride, fail);
 779         s->coded_block = s->coded_block_base + s->b8_stride + 1;
 780
 781         /* cbp, ac_pred, pred_dir */
 782         FF_ALLOCZ_OR_GOTO(s->avctx, s->cbp_table     , mb_array_size * sizeof(uint8_t), fail);
 783         FF_ALLOCZ_OR_GOTO(s->avctx, s->pred_dir_table, mb_array_size * sizeof(uint8_t), fail);
 784     }
 785
 786     if (s->h263_pred || s->h263_plus || !s->encoding) {
 787         /* dc values */
 788         // MN: we need these for error resilience of intra-frames
 789         FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base, yc_size * sizeof(int16_t), fail);
 790         s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
 791         s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
 792         s->dc_val[2] = s->dc_val[1] + c_size;
 793         for (i = 0; i < yc_size; i++)
 794             s->dc_val_base[i] = 1024;
 795     }
 796
 797     /* which mb is an intra block */
 798     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
 799     memset(s->mbintra_table, 1, mb_array_size);
 800
 801     /* init macroblock skip table */
 802     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
 803     // Note the + 1 is for a quicker MPEG-4 slice_end detection
 804
 805     return ff_mpeg_er_init(s);
 806 fail:
 807     return AVERROR(ENOMEM);
 808 }
 809
 810 static void clear_context(MpegEncContext *s)
 811 {
 812     int i, j, k;
 813
 814     memset(&s->next_picture, 0, sizeof(s->next_picture));
 815     memset(&s->last_picture, 0, sizeof(s->last_picture));
 816     memset(&s->current_picture, 0, sizeof(s->current_picture));
 817     memset(&s->new_picture, 0, sizeof(s->new_picture));
 818
 819     memset(s->thread_context, 0, sizeof(s->thread_context));
 820
 821     s->me.map = NULL;
 822     s->me.score_map = NULL;
 823     s->dct_error_sum = NULL;
 824     s->block = NULL;
 825     s->blocks = NULL;
 826     s->block32 = NULL;
 827     memset(s->pblocks, 0, sizeof(s->pblocks));
 828     s->dpcm_direction = 0;
 829     s->dpcm_macroblock = NULL;
 830     s->ac_val_base = NULL;
 831     s->ac_val[0] =
 832     s->ac_val[1] =
 833     s->ac_val[2] =NULL;
 834     s->sc.edge_emu_buffer = NULL;
 835     s->me.scratchpad = NULL;
 836     s->me.temp =
 837     s->sc.rd_scratchpad =
 838     s->sc.b_scratchpad =
 839     s->sc.obmc_scratchpad = NULL;
 840
 841
 842     s->bitstream_buffer = NULL;
 843     s->allocated_bitstream_buffer_size = 0;
 844     s->picture          = NULL;
 845     s->mb_type          = NULL;
 846     s->p_mv_table_base  = NULL;
 847     s->b_forw_mv_table_base = NULL;
 848     s->b_back_mv_table_base = NULL;
 849     s->b_bidir_forw_mv_table_base = NULL;
 850     s->b_bidir_back_mv_table_base = NULL;
 851     s->b_direct_mv_table_base = NULL;
 852     s->p_mv_table            = NULL;
 853     s->b_forw_mv_table       = NULL;
 854     s->b_back_mv_table       = NULL;
 855     s->b_bidir_forw_mv_table = NULL;
 856     s->b_bidir_back_mv_table = NULL;
 857     s->b_direct_mv_table     = NULL;
 858     for (i = 0; i < 2; i++) {
 859         for (j = 0; j < 2; j++) {
 860             for (k = 0; k < 2; k++) {
 861                 s->b_field_mv_table_base[i][j][k] = NULL;
 862                 s->b_field_mv_table[i][j][k] = NULL;
 863             }
 864             s->b_field_select_table[i][j] = NULL;
 865             s->p_field_mv_table_base[i][j] = NULL;
 866             s->p_field_mv_table[i][j] = NULL;
 867         }
 868         s->p_field_select_table[i] = NULL;
 869     }
 870
 871     s->dc_val_base = NULL;
 872     s->coded_block_base = NULL;
 873     s->mbintra_table = NULL;
 874     s->cbp_table = NULL;
 875     s->pred_dir_table = NULL;
 876
 877     s->mbskip_table = NULL;
 878
 879     s->er.error_status_table = NULL;
 880     s->er.er_temp_buffer = NULL;
 881     s->mb_index2xy = NULL;
 882     s->lambda_table = NULL;
 883
 884     s->cplx_tab = NULL;
 885     s->bits_tab = NULL;
 886 }
 887
 888 /**
 889  * init common structure for both encoder and decoder.
 890  * this assumes that some variables like width/height are already set
 891  */
 892 av_cold int ff_mpv_common_init(MpegEncContext *s)
 893 {
 894     int i, ret;
 895     int nb_slices = (HAVE_THREADS &&
 896                      s->avctx->active_thread_type & FF_THREAD_SLICE) ?
 897                     s->avctx->thread_count : 1;
 898
 899     clear_context(s);
 900
 901     if (s->encoding && s->avctx->slices)
 902         nb_slices = s->avctx->slices;
 903
 904     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
 905         s->mb_height = (s->height + 31) / 32 * 2;
 906     else
 907         s->mb_height = (s->height + 15) / 16;
 908
 909     if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
 910         av_log(s->avctx, AV_LOG_ERROR,
 911                "decoding to AV_PIX_FMT_NONE is not supported.\n");
 912         return -1;
 913     }
 914
 915     if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
 916         int max_slices;
 917         if (s->mb_height)
 918             max_slices = FFMIN(MAX_THREADS, s->mb_height);
 919         else
 920             max_slices = MAX_THREADS;
 921         av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
 922                " reducing to %d\n", nb_slices, max_slices);
 923         nb_slices = max_slices;
 924     }
 925
 926     if ((s->width || s->height) &&
 927         av_image_check_size(s->width, s->height, 0, s->avctx))
 928         return -1;
 929
 930     dct_init(s);
 931
 932     /* set chroma shifts */
 933     ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
 934                                            &s->chroma_x_shift,
 935                                            &s->chroma_y_shift);
 936     if (ret)
 937         return ret;
 938
 939     FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
 940                       MAX_PICTURE_COUNT * sizeof(Picture), fail);
 941     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 942         s->picture[i].f = av_frame_alloc();
 943         if (!s->picture[i].f)
 944             goto fail;
 945     }
 946     s->next_picture.f = av_frame_alloc();
 947     if (!s->next_picture.f)
 948         goto fail;
 949     s->last_picture.f = av_frame_alloc();
 950     if (!s->last_picture.f)
 951         goto fail;
 952     s->current_picture.f = av_frame_alloc();
 953     if (!s->current_picture.f)
 954         goto fail;
 955     s->new_picture.f = av_frame_alloc();
 956     if (!s->new_picture.f)
 957         goto fail;
 958
 959     if (init_context_frame(s))
 960         goto fail;
 961
 962     s->parse_context.state = -1;
 963
 964     s->context_initialized = 1;
 965     memset(s->thread_context, 0, sizeof(s->thread_context));
 966     s->thread_context[0]   = s;
 967
 968 //     if (s->width && s->height) {
 969     if (nb_slices > 1) {
 970         for (i = 0; i < nb_slices; i++) {
 971             if (i) {
 972                 s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
 973                 if (!s->thread_context[i])
 974                     goto fail;
 975             }
 976             if (init_duplicate_context(s->thread_context[i]) < 0)
 977                 goto fail;
 978             s->thread_context[i]->start_mb_y =
 979                 (s->mb_height * (i) + nb_slices / 2) / nb_slices;
 980             s->thread_context[i]->end_mb_y   =
 981                 (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
 982         }
 983     } else {
 984         if (init_duplicate_context(s) < 0)
 985             goto fail;
 986         s->start_mb_y = 0;
 987         s->end_mb_y   = s->mb_height;
 988     }
 989     s->slice_context_count = nb_slices;
 990 //     }
 991
 992     return 0;
 993  fail:
 994     ff_mpv_common_end(s);
 995     return -1;
 996 }
 997
 998 /**
 999  * Frees and resets MpegEncContext fields depending on the resolution.
1000  * Is used during resolution changes to avoid a full reinitialization of the
1001  * codec.
1002  */
1003 static void free_context_frame(MpegEncContext *s)
1004 {
1005     int i, j, k;
1006
1007     av_freep(&s->mb_type);
1008     av_freep(&s->p_mv_table_base);
1009     av_freep(&s->b_forw_mv_table_base);
1010     av_freep(&s->b_back_mv_table_base);
1011     av_freep(&s->b_bidir_forw_mv_table_base);
1012     av_freep(&s->b_bidir_back_mv_table_base);
1013     av_freep(&s->b_direct_mv_table_base);
1014     s->p_mv_table            = NULL;
1015     s->b_forw_mv_table       = NULL;
1016     s->b_back_mv_table       = NULL;
1017     s->b_bidir_forw_mv_table = NULL;
1018     s->b_bidir_back_mv_table = NULL;
1019     s->b_direct_mv_table     = NULL;
1020     for (i = 0; i < 2; i++) {
1021         for (j = 0; j < 2; j++) {
1022             for (k = 0; k < 2; k++) {
1023                 av_freep(&s->b_field_mv_table_base[i][j][k]);
1024                 s->b_field_mv_table[i][j][k] = NULL;
1025             }
1026             av_freep(&s->b_field_select_table[i][j]);
1027             av_freep(&s->p_field_mv_table_base[i][j]);
1028             s->p_field_mv_table[i][j] = NULL;
1029         }
1030         av_freep(&s->p_field_select_table[i]);
1031     }
1032
1033     av_freep(&s->dc_val_base);
1034     av_freep(&s->coded_block_base);
1035     av_freep(&s->mbintra_table);
1036     av_freep(&s->cbp_table);
1037     av_freep(&s->pred_dir_table);
1038
1039     av_freep(&s->mbskip_table);
1040
1041     av_freep(&s->er.error_status_table);
1042     av_freep(&s->er.er_temp_buffer);
1043     av_freep(&s->mb_index2xy);
1044     av_freep(&s->lambda_table);
1045
1046     av_freep(&s->cplx_tab);
1047     av_freep(&s->bits_tab);
1048
1049     s->linesize = s->uvlinesize = 0;
1050 }
1051
1052 int ff_mpv_common_frame_size_change(MpegEncContext *s)
1053 {
1054     int i, err = 0;
1055
1056     if (!s->context_initialized)
1057         return AVERROR(EINVAL);
1058
1059     if (s->slice_context_count > 1) {
1060         for (i = 0; i < s->slice_context_count; i++) {
1061             free_duplicate_context(s->thread_context[i]);
1062         }
1063         for (i = 1; i < s->slice_context_count; i++) {
1064             av_freep(&s->thread_context[i]);
1065         }
1066     } else
1067         free_duplicate_context(s);
1068
1069     free_context_frame(s);
1070
1071     if (s->picture)
1072         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1073                 s->picture[i].needs_realloc = 1;
1074         }
1075
1076     s->last_picture_ptr         =
1077     s->next_picture_ptr         =
1078     s->current_picture_ptr      = NULL;
1079
1080     // init
1081     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
1082         s->mb_height = (s->height + 31) / 32 * 2;
1083     else
1084         s->mb_height = (s->height + 15) / 16;
1085
1086     if ((s->width || s->height) &&
1087         (err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
1088         goto fail;
1089
1090     if ((err = init_context_frame(s)))
1091         goto fail;
1092
1093     memset(s->thread_context, 0, sizeof(s->thread_context));
1094     s->thread_context[0]   = s;
1095
1096     if (s->width && s->height) {
1097         int nb_slices = s->slice_context_count;
1098         if (nb_slices > 1) {
1099             for (i = 0; i < nb_slices; i++) {
1100                 if (i) {
1101                     s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
1102                     if (!s->thread_context[i]) {
1103                         err = AVERROR(ENOMEM);
1104                         goto fail;
1105                     }
1106                 }
1107                 if ((err = init_duplicate_context(s->thread_context[i])) < 0)
1108                     goto fail;
1109                 s->thread_context[i]->start_mb_y =
1110                     (s->mb_height * (i) + nb_slices / 2) / nb_slices;
1111                 s->thread_context[i]->end_mb_y   =
1112                     (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
1113             }
1114         } else {
1115             err = init_duplicate_context(s);
1116             if (err < 0)
1117                 goto fail;
1118             s->start_mb_y = 0;
1119             s->end_mb_y   = s->mb_height;
1120         }
1121         s->slice_context_count = nb_slices;
1122     }
1123
1124     return 0;
1125  fail:
1126     ff_mpv_common_end(s);
1127     return err;
1128 }
1129
1130 /* init common structure for both encoder and decoder */
1131 void ff_mpv_common_end(MpegEncContext *s)
1132 {
1133     int i;
1134
1135     if (!s)
1136         return ;
1137
1138     if (s->slice_context_count > 1) {
1139         for (i = 0; i < s->slice_context_count; i++) {
1140             free_duplicate_context(s->thread_context[i]);
1141         }
1142         for (i = 1; i < s->slice_context_count; i++) {
1143             av_freep(&s->thread_context[i]);
1144         }
1145         s->slice_context_count = 1;
1146     } else free_duplicate_context(s);
1147
1148     av_freep(&s->parse_context.buffer);
1149     s->parse_context.buffer_size = 0;
1150
1151     av_freep(&s->bitstream_buffer);
1152     s->allocated_bitstream_buffer_size = 0;
1153
1154     if (s->picture) {
1155         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1156             ff_free_picture_tables(&s->picture[i]);
1157             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1158             av_frame_free(&s->picture[i].f);
1159         }
1160     }
1161     av_freep(&s->picture);
1162     ff_free_picture_tables(&s->last_picture);
1163     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1164     av_frame_free(&s->last_picture.f);
1165     ff_free_picture_tables(&s->current_picture);
1166     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1167     av_frame_free(&s->current_picture.f);
1168     ff_free_picture_tables(&s->next_picture);
1169     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1170     av_frame_free(&s->next_picture.f);
1171     ff_free_picture_tables(&s->new_picture);
1172     ff_mpeg_unref_picture(s->avctx, &s->new_picture);
1173     av_frame_free(&s->new_picture.f);
1174
1175     free_context_frame(s);
1176
1177     s->context_initialized      = 0;
1178     s->last_picture_ptr         =
1179     s->next_picture_ptr         =
1180     s->current_picture_ptr      = NULL;
1181     s->linesize = s->uvlinesize = 0;
1182 }
1183
1184
1185 static void gray_frame(AVFrame *frame)
1186 {
1187     int i, h_chroma_shift, v_chroma_shift;
1188
1189     av_pix_fmt_get_chroma_sub_sample(frame->format, &h_chroma_shift, &v_chroma_shift);
1190
1191     for(i=0; i<frame->height; i++)
1192         memset(frame->data[0] + frame->linesize[0]*i, 0x80, frame->width);
1193     for(i=0; i<AV_CEIL_RSHIFT(frame->height, v_chroma_shift); i++) {
1194         memset(frame->data[1] + frame->linesize[1]*i,
1195                0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1196         memset(frame->data[2] + frame->linesize[2]*i,
1197                0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1198     }
1199 }
1200
1201 /**
1202  * generic function called after decoding
1203  * the header and before a frame is decoded.
1204  */
1205 int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
1206 {
1207     int i, ret;
1208     Picture *pic;
1209     s->mb_skipped = 0;
1210
1211     if (!ff_thread_can_start_frame(avctx)) {
1212         av_log(avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
1213         return -1;
1214     }
1215
1216     /* mark & release old frames */
1217     if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
1218         s->last_picture_ptr != s->next_picture_ptr &&
1219         s->last_picture_ptr->f->buf[0]) {
1220         ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr);
1221     }
1222
1223     /* release forgotten pictures */
1224     /* if (MPEG-124 / H.263) */
1225     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1226         if (&s->picture[i] != s->last_picture_ptr &&
1227             &s->picture[i] != s->next_picture_ptr &&
1228             s->picture[i].reference && !s->picture[i].needs_realloc) {
1229             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1230         }
1231     }
1232
1233     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1234     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1235     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1236
1237     /* release non reference frames */
1238     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1239         if (!s->picture[i].reference)
1240             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1241     }
1242
1243     if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) {
1244         // we already have an unused image
1245         // (maybe it was set before reading the header)
1246         pic = s->current_picture_ptr;
1247     } else {
1248         i   = ff_find_unused_picture(s->avctx, s->picture, 0);
1249         if (i < 0) {
1250             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1251             return i;
1252         }
1253         pic = &s->picture[i];
1254     }
1255
1256     pic->reference = 0;
1257     if (!s->droppable) {
1258         if (s->pict_type != AV_PICTURE_TYPE_B)
1259             pic->reference = 3;
1260     }
1261
1262     pic->f->coded_picture_number = s->coded_picture_number++;
1263
1264     if (alloc_picture(s, pic, 0) < 0)
1265         return -1;
1266
1267     s->current_picture_ptr = pic;
1268     // FIXME use only the vars from current_pic
1269     s->current_picture_ptr->f->top_field_first = s->top_field_first;
1270     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
1271         s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1272         if (s->picture_structure != PICT_FRAME)
1273             s->current_picture_ptr->f->top_field_first =
1274                 (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
1275     }
1276     s->current_picture_ptr->f->interlaced_frame = !s->progressive_frame &&
1277                                                  !s->progressive_sequence;
1278     s->current_picture_ptr->field_picture      =  s->picture_structure != PICT_FRAME;
1279
1280     s->current_picture_ptr->f->pict_type = s->pict_type;
1281     // if (s->avctx->flags && AV_CODEC_FLAG_QSCALE)
1282     //     s->current_picture_ptr->quality = s->new_picture_ptr->quality;
1283     s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1284
1285     if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture,
1286                                    s->current_picture_ptr)) < 0)
1287         return ret;
1288
1289     if (s->pict_type != AV_PICTURE_TYPE_B) {
1290         s->last_picture_ptr = s->next_picture_ptr;
1291         if (!s->droppable)
1292             s->next_picture_ptr = s->current_picture_ptr;
1293     }
1294     ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1295             s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr,
1296             s->last_picture_ptr    ? s->last_picture_ptr->f->data[0]    : NULL,
1297             s->next_picture_ptr    ? s->next_picture_ptr->f->data[0]    : NULL,
1298             s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL,
1299             s->pict_type, s->droppable);
1300
1301     if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
1302         (s->pict_type != AV_PICTURE_TYPE_I)) {
1303         int h_chroma_shift, v_chroma_shift;
1304         av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
1305                                          &h_chroma_shift, &v_chroma_shift);
1306         if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0])
1307             av_log(avctx, AV_LOG_DEBUG,
1308                    "allocating dummy last picture for B frame\n");
1309         else if (s->pict_type != AV_PICTURE_TYPE_I)
1310             av_log(avctx, AV_LOG_ERROR,
1311                    "warning: first frame is no keyframe\n");
1312
1313         /* Allocate a dummy frame */
1314         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1315         if (i < 0) {
1316             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1317             return i;
1318         }
1319         s->last_picture_ptr = &s->picture[i];
1320
1321         s->last_picture_ptr->reference   = 3;
1322         s->last_picture_ptr->f->key_frame = 0;
1323         s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1324
1325         if (alloc_picture(s, s->last_picture_ptr, 0) < 0) {
1326             s->last_picture_ptr = NULL;
1327             return -1;
1328         }
1329
1330         if (!avctx->hwaccel) {
1331             for(i=0; i<avctx->height; i++)
1332                 memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i,
1333                        0x80, avctx->width);
1334             if (s->last_picture_ptr->f->data[2]) {
1335                 for(i=0; i<AV_CEIL_RSHIFT(avctx->height, v_chroma_shift); i++) {
1336                     memset(s->last_picture_ptr->f->data[1] + s->last_picture_ptr->f->linesize[1]*i,
1337                         0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1338                     memset(s->last_picture_ptr->f->data[2] + s->last_picture_ptr->f->linesize[2]*i,
1339                         0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1340                 }
1341             }
1342
1343             if(s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263){
1344                 for(i=0; i<avctx->height; i++)
1345                 memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i, 16, avctx->width);
1346             }
1347         }
1348
1349         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
1350         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
1351     }
1352     if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) &&
1353         s->pict_type == AV_PICTURE_TYPE_B) {
1354         /* Allocate a dummy frame */
1355         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1356         if (i < 0) {
1357             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1358             return i;
1359         }
1360         s->next_picture_ptr = &s->picture[i];
1361
1362         s->next_picture_ptr->reference   = 3;
1363         s->next_picture_ptr->f->key_frame = 0;
1364         s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1365
1366         if (alloc_picture(s, s->next_picture_ptr, 0) < 0) {
1367             s->next_picture_ptr = NULL;
1368             return -1;
1369         }
1370         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
1371         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
1372     }
1373
1374 #if 0 // BUFREF-FIXME
1375     memset(s->last_picture.f->data, 0, sizeof(s->last_picture.f->data));
1376     memset(s->next_picture.f->data, 0, sizeof(s->next_picture.f->data));
1377 #endif
1378     if (s->last_picture_ptr) {
1379         if (s->last_picture_ptr->f->buf[0] &&
1380             (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture,
1381                                        s->last_picture_ptr)) < 0)
1382             return ret;
1383     }
1384     if (s->next_picture_ptr) {
1385         if (s->next_picture_ptr->f->buf[0] &&
1386             (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture,
1387                                        s->next_picture_ptr)) < 0)
1388             return ret;
1389     }
1390
1391     av_assert0(s->pict_type == AV_PICTURE_TYPE_I || (s->last_picture_ptr &&
1392                                                  s->last_picture_ptr->f->buf[0]));
1393
1394     if (s->picture_structure!= PICT_FRAME) {
1395         int i;
1396         for (i = 0; i < 4; i++) {
1397             if (s->picture_structure == PICT_BOTTOM_FIELD) {
1398                 s->current_picture.f->data[i] +=
1399                     s->current_picture.f->linesize[i];
1400             }
1401             s->current_picture.f->linesize[i] *= 2;
1402             s->last_picture.f->linesize[i]    *= 2;
1403             s->next_picture.f->linesize[i]    *= 2;
1404         }
1405     }
1406
1407     /* set dequantizer, we can't do it during init as
1408      * it might change for MPEG-4 and we can't do it in the header
1409      * decode as init is not called for MPEG-4 there yet */
1410     if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1411         s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
1412         s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
1413     } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
1414         s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
1415         s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
1416     } else {
1417         s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
1418         s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
1419     }
1420
1421     if (s->avctx->debug & FF_DEBUG_NOMC) {
1422         gray_frame(s->current_picture_ptr->f);
1423     }
1424
1425     return 0;
1426 }
1427
1428 /* called after a frame has been decoded. */
1429 void ff_mpv_frame_end(MpegEncContext *s)
1430 {
1431     emms_c();
1432
1433     if (s->current_picture.reference)
1434         ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1435 }
1436
1437 void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
1438 {
1439     ff_print_debug_info2(s->avctx, pict, s->mbskip_table, p->mb_type,
1440                          p->qscale_table, p->motion_val, &s->low_delay,
1441                          s->mb_width, s->mb_height, s->mb_stride, s->quarter_sample);
1442 }
1443
1444 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
1445 {
1446     AVBufferRef *ref = av_buffer_ref(p->qscale_table_buf);
1447     int offset = 2*s->mb_stride + 1;
1448     if(!ref)
1449         return AVERROR(ENOMEM);
1450     av_assert0(ref->size >= offset + s->mb_stride * ((f->height+15)/16));
1451     ref->size -= offset;
1452     ref->data += offset;
1453     return av_frame_set_qp_table(f, ref, s->mb_stride, qp_type);
1454 }
1455
1456 static inline int hpel_motion_lowres(MpegEncContext *s,
1457                                      uint8_t *dest, uint8_t *src,
1458                                      int field_based, int field_select,
1459                                      int src_x, int src_y,
1460                                      int width, int height, ptrdiff_t stride,
1461                                      int h_edge_pos, int v_edge_pos,
1462                                      int w, int h, h264_chroma_mc_func *pix_op,
1463                                      int motion_x, int motion_y)
1464 {
1465     const int lowres   = s->avctx->lowres;
1466     const int op_index = FFMIN(lowres, 3);
1467     const int s_mask   = (2 << lowres) - 1;
1468     int emu = 0;
1469     int sx, sy;
1470
1471     if (s->quarter_sample) {
1472         motion_x /= 2;
1473         motion_y /= 2;
1474     }
1475
1476     sx = motion_x & s_mask;
1477     sy = motion_y & s_mask;
1478     src_x += motion_x >> lowres + 1;
1479     src_y += motion_y >> lowres + 1;
1480
1481     src   += src_y * stride + src_x;
1482
1483     if ((unsigned)src_x > FFMAX( h_edge_pos - (!!sx) - w,                 0) ||
1484         (unsigned)src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
1485         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
1486                                  s->linesize, s->linesize,
1487                                  w + 1, (h + 1) << field_based,
1488                                  src_x, src_y   << field_based,
1489                                  h_edge_pos, v_edge_pos);
1490         src = s->sc.edge_emu_buffer;
1491         emu = 1;
1492     }
1493
1494     sx = (sx << 2) >> lowres;
1495     sy = (sy << 2) >> lowres;
1496     if (field_select)
1497         src += s->linesize;
1498     pix_op[op_index](dest, src, stride, h, sx, sy);
1499     return emu;
1500 }
1501
1502 /* apply one mpeg motion vector to the three components */
1503 static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
1504                                                 uint8_t *dest_y,
1505                                                 uint8_t *dest_cb,
1506                                                 uint8_t *dest_cr,
1507                                                 int field_based,
1508                                                 int bottom_field,
1509                                                 int field_select,
1510                                                 uint8_t **ref_picture,
1511                                                 h264_chroma_mc_func *pix_op,
1512                                                 int motion_x, int motion_y,
1513                                                 int h, int mb_y)
1514 {
1515     uint8_t *ptr_y, *ptr_cb, *ptr_cr;
1516     int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy;
1517     ptrdiff_t uvlinesize, linesize;
1518     const int lowres     = s->avctx->lowres;
1519     const int op_index   = FFMIN(lowres-1+s->chroma_x_shift, 3);
1520     const int block_s    = 8>>lowres;
1521     const int s_mask     = (2 << lowres) - 1;
1522     const int h_edge_pos = s->h_edge_pos >> lowres;
1523     const int v_edge_pos = s->v_edge_pos >> lowres;
1524     linesize   = s->current_picture.f->linesize[0] << field_based;
1525     uvlinesize = s->current_picture.f->linesize[1] << field_based;
1526
1527     // FIXME obviously not perfect but qpel will not work in lowres anyway
1528     if (s->quarter_sample) {
1529         motion_x /= 2;
1530         motion_y /= 2;
1531     }
1532
1533     if(field_based){
1534         motion_y += (bottom_field - field_select)*((1 << lowres)-1);
1535     }
1536
1537     sx = motion_x & s_mask;
1538     sy = motion_y & s_mask;
1539     src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1);
1540     src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1);
1541
1542     if (s->out_format == FMT_H263) {
1543         uvsx    = ((motion_x >> 1) & s_mask) | (sx & 1);
1544         uvsy    = ((motion_y >> 1) & s_mask) | (sy & 1);
1545         uvsrc_x = src_x >> 1;
1546         uvsrc_y = src_y >> 1;
1547     } else if (s->out_format == FMT_H261) {
1548         // even chroma mv's are full pel in H261
1549         mx      = motion_x / 4;
1550         my      = motion_y / 4;
1551         uvsx    = (2 * mx) & s_mask;
1552         uvsy    = (2 * my) & s_mask;
1553         uvsrc_x = s->mb_x * block_s + (mx >> lowres);
1554         uvsrc_y =    mb_y * block_s + (my >> lowres);
1555     } else {
1556         if(s->chroma_y_shift){
1557             mx      = motion_x / 2;
1558             my      = motion_y / 2;
1559             uvsx    = mx & s_mask;
1560             uvsy    = my & s_mask;
1561             uvsrc_x = s->mb_x * block_s                 + (mx >> lowres + 1);
1562             uvsrc_y =   (mb_y * block_s >> field_based) + (my >> lowres + 1);
1563         } else {
1564             if(s->chroma_x_shift){
1565             //Chroma422
1566                 mx = motion_x / 2;
1567                 uvsx = mx & s_mask;
1568                 uvsy = motion_y & s_mask;
1569                 uvsrc_y = src_y;
1570                 uvsrc_x = s->mb_x*block_s               + (mx >> (lowres+1));
1571             } else {
1572             //Chroma444
1573                 uvsx = motion_x & s_mask;
1574                 uvsy = motion_y & s_mask;
1575                 uvsrc_x = src_x;
1576                 uvsrc_y = src_y;
1577             }
1578         }
1579     }
1580
1581     ptr_y  = ref_picture[0] + src_y   * linesize   + src_x;
1582     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
1583     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
1584
1585     if ((unsigned) src_x > FFMAX( h_edge_pos - (!!sx) - 2 * block_s,       0) || uvsrc_y<0 ||
1586         (unsigned) src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
1587         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
1588                                  linesize >> field_based, linesize >> field_based,
1589                                  17, 17 + field_based,
1590                                 src_x, src_y << field_based, h_edge_pos,
1591                                 v_edge_pos);
1592         ptr_y = s->sc.edge_emu_buffer;
1593         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1594             uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
1595             uint8_t *vbuf =ubuf + 10 * s->uvlinesize;
1596             if (s->workaround_bugs & FF_BUG_IEDGE)
1597                 vbuf -= s->uvlinesize;
1598             s->vdsp.emulated_edge_mc(ubuf,  ptr_cb,
1599                                      uvlinesize >> field_based, uvlinesize >> field_based,
1600                                      9, 9 + field_based,
1601                                     uvsrc_x, uvsrc_y << field_based,
1602                                     h_edge_pos >> 1, v_edge_pos >> 1);
1603             s->vdsp.emulated_edge_mc(vbuf,  ptr_cr,
1604                                      uvlinesize >> field_based,uvlinesize >> field_based,
1605                                      9, 9 + field_based,
1606                                     uvsrc_x, uvsrc_y << field_based,
1607                                     h_edge_pos >> 1, v_edge_pos >> 1);
1608             ptr_cb = ubuf;
1609             ptr_cr = vbuf;
1610         }
1611     }
1612
1613     // FIXME use this for field pix too instead of the obnoxious hack which changes picture.f->data
1614     if (bottom_field) {
1615         dest_y  += s->linesize;
1616         dest_cb += s->uvlinesize;
1617         dest_cr += s->uvlinesize;
1618     }
1619
1620     if (field_select) {
1621         ptr_y   += s->linesize;
1622         ptr_cb  += s->uvlinesize;
1623         ptr_cr  += s->uvlinesize;
1624     }
1625
1626     sx = (sx << 2) >> lowres;
1627     sy = (sy << 2) >> lowres;
1628     pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy);
1629
1630     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1631         int hc = s->chroma_y_shift ? (h+1-bottom_field)>>1 : h;
1632         uvsx = (uvsx << 2) >> lowres;
1633         uvsy = (uvsy << 2) >> lowres;
1634         if (hc) {
1635             pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy);
1636             pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy);
1637         }
1638     }
1639     // FIXME h261 lowres loop filter
1640 }
1641
1642 static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
1643                                             uint8_t *dest_cb, uint8_t *dest_cr,
1644                                             uint8_t **ref_picture,
1645                                             h264_chroma_mc_func * pix_op,
1646                                             int mx, int my)
1647 {
1648     const int lowres     = s->avctx->lowres;
1649     const int op_index   = FFMIN(lowres, 3);
1650     const int block_s    = 8 >> lowres;
1651     const int s_mask     = (2 << lowres) - 1;
1652     const int h_edge_pos = s->h_edge_pos >> lowres + 1;
1653     const int v_edge_pos = s->v_edge_pos >> lowres + 1;
1654     int emu = 0, src_x, src_y, sx, sy;
1655     ptrdiff_t offset;
1656     uint8_t *ptr;
1657
1658     if (s->quarter_sample) {
1659         mx /= 2;
1660         my /= 2;
1661     }
1662
1663     /* In case of 8X8, we construct a single chroma motion vector
1664        with a special rounding */
1665     mx = ff_h263_round_chroma(mx);
1666     my = ff_h263_round_chroma(my);
1667
1668     sx = mx & s_mask;
1669     sy = my & s_mask;
1670     src_x = s->mb_x * block_s + (mx >> lowres + 1);
1671     src_y = s->mb_y * block_s + (my >> lowres + 1);
1672
1673     offset = src_y * s->uvlinesize + src_x;
1674     ptr = ref_picture[1] + offset;
1675     if ((unsigned) src_x > FFMAX(h_edge_pos - (!!sx) - block_s, 0) ||
1676         (unsigned) src_y > FFMAX(v_edge_pos - (!!sy) - block_s, 0)) {
1677         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
1678                                  s->uvlinesize, s->uvlinesize,
1679                                  9, 9,
1680                                  src_x, src_y, h_edge_pos, v_edge_pos);
1681         ptr = s->sc.edge_emu_buffer;
1682         emu = 1;
1683     }
1684     sx = (sx << 2) >> lowres;
1685     sy = (sy << 2) >> lowres;
1686     pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
1687
1688     ptr = ref_picture[2] + offset;
1689     if (emu) {
1690         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
1691                                  s->uvlinesize, s->uvlinesize,
1692                                  9, 9,
1693                                  src_x, src_y, h_edge_pos, v_edge_pos);
1694         ptr = s->sc.edge_emu_buffer;
1695     }
1696     pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
1697 }
1698
1699 /**
1700  * motion compensation of a single macroblock
1701  * @param s context
1702  * @param dest_y luma destination pointer
1703  * @param dest_cb chroma cb/u destination pointer
1704  * @param dest_cr chroma cr/v destination pointer
1705  * @param dir direction (0->forward, 1->backward)
1706  * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
1707  * @param pix_op halfpel motion compensation function (average or put normally)
1708  * the motion vectors are taken from s->mv and the MV type from s->mv_type
1709  */
1710 static inline void MPV_motion_lowres(MpegEncContext *s,
1711                                      uint8_t *dest_y, uint8_t *dest_cb,
1712                                      uint8_t *dest_cr,
1713                                      int dir, uint8_t **ref_picture,
1714                                      h264_chroma_mc_func *pix_op)
1715 {
1716     int mx, my;
1717     int mb_x, mb_y, i;
1718     const int lowres  = s->avctx->lowres;
1719     const int block_s = 8 >>lowres;
1720
1721     mb_x = s->mb_x;
1722     mb_y = s->mb_y;
1723
1724     switch (s->mv_type) {
1725     case MV_TYPE_16X16:
1726         mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1727                            0, 0, 0,
1728                            ref_picture, pix_op,
1729                            s->mv[dir][0][0], s->mv[dir][0][1],
1730                            2 * block_s, mb_y);
1731         break;
1732     case MV_TYPE_8X8:
1733         mx = 0;
1734         my = 0;
1735         for (i = 0; i < 4; i++) {
1736             hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) *
1737                                s->linesize) * block_s,
1738                                ref_picture[0], 0, 0,
1739                                (2 * mb_x + (i & 1)) * block_s,
1740                                (2 * mb_y + (i >> 1)) * block_s,
1741                                s->width, s->height, s->linesize,
1742                                s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
1743                                block_s, block_s, pix_op,
1744                                s->mv[dir][i][0], s->mv[dir][i][1]);
1745
1746             mx += s->mv[dir][i][0];
1747             my += s->mv[dir][i][1];
1748         }
1749
1750         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
1751             chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture,
1752                                      pix_op, mx, my);
1753         break;
1754     case MV_TYPE_FIELD:
1755         if (s->picture_structure == PICT_FRAME) {
1756             /* top field */
1757             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1758                                1, 0, s->field_select[dir][0],
1759                                ref_picture, pix_op,
1760                                s->mv[dir][0][0], s->mv[dir][0][1],
1761                                block_s, mb_y);
1762             /* bottom field */
1763             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1764                                1, 1, s->field_select[dir][1],
1765                                ref_picture, pix_op,
1766                                s->mv[dir][1][0], s->mv[dir][1][1],
1767                                block_s, mb_y);
1768         } else {
1769             if (s->picture_structure != s->field_select[dir][0] + 1 &&
1770                 s->pict_type != AV_PICTURE_TYPE_B && !s->first_field) {
1771                 ref_picture = s->current_picture_ptr->f->data;
1772
1773             }
1774             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1775                                0, 0, s->field_select[dir][0],
1776                                ref_picture, pix_op,
1777                                s->mv[dir][0][0],
1778                                s->mv[dir][0][1], 2 * block_s, mb_y >> 1);
1779             }
1780         break;
1781     case MV_TYPE_16X8:
1782         for (i = 0; i < 2; i++) {
1783             uint8_t **ref2picture;
1784
1785             if (s->picture_structure == s->field_select[dir][i] + 1 ||
1786                 s->pict_type == AV_PICTURE_TYPE_B || s->first_field) {
1787                 ref2picture = ref_picture;
1788             } else {
1789                 ref2picture = s->current_picture_ptr->f->data;
1790             }
1791
1792             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1793                                0, 0, s->field_select[dir][i],
1794                                ref2picture, pix_op,
1795                                s->mv[dir][i][0], s->mv[dir][i][1] +
1796                                2 * block_s * i, block_s, mb_y >> 1);
1797
1798             dest_y  +=  2 * block_s *  s->linesize;
1799             dest_cb += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
1800             dest_cr += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
1801         }
1802         break;
1803     case MV_TYPE_DMV:
1804         if (s->picture_structure == PICT_FRAME) {
1805             for (i = 0; i < 2; i++) {
1806                 int j;
1807                 for (j = 0; j < 2; j++) {
1808                     mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1809                                        1, j, j ^ i,
1810                                        ref_picture, pix_op,
1811                                        s->mv[dir][2 * i + j][0],
1812                                        s->mv[dir][2 * i + j][1],
1813                                        block_s, mb_y);
1814                 }
1815                 pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
1816             }
1817         } else {
1818             for (i = 0; i < 2; i++) {
1819                 mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1820                                    0, 0, s->picture_structure != i + 1,
1821                                    ref_picture, pix_op,
1822                                    s->mv[dir][2 * i][0],s->mv[dir][2 * i][1],
1823                                    2 * block_s, mb_y >> 1);
1824
1825                 // after put we make avg of the same block
1826                 pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
1827
1828                 // opposite parity is always in the same
1829                 // frame if this is second field
1830                 if (!s->first_field) {
1831                     ref_picture = s->current_picture_ptr->f->data;
1832                 }
1833             }
1834         }
1835         break;
1836     default:
1837         av_assert2(0);
1838     }
1839 }
1840
1841 /**
1842  * find the lowest MB row referenced in the MVs
1843  */
1844 static int lowest_referenced_row(MpegEncContext *s, int dir)
1845 {
1846     int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
1847     int my, off, i, mvs;
1848
1849     if (s->picture_structure != PICT_FRAME || s->mcsel)
1850         goto unhandled;
1851
1852     switch (s->mv_type) {
1853         case MV_TYPE_16X16:
1854             mvs = 1;
1855             break;
1856         case MV_TYPE_16X8:
1857             mvs = 2;
1858             break;
1859         case MV_TYPE_8X8:
1860             mvs = 4;
1861             break;
1862         default:
1863             goto unhandled;
1864     }
1865
1866     for (i = 0; i < mvs; i++) {
1867         my = s->mv[dir][i][1];
1868         my_max = FFMAX(my_max, my);
1869         my_min = FFMIN(my_min, my);
1870     }
1871
1872     off = ((FFMAX(-my_min, my_max)<<qpel_shift) + 63) >> 6;
1873
1874     return av_clip(s->mb_y + off, 0, s->mb_height - 1);
1875 unhandled:
1876     return s->mb_height-1;
1877 }
1878
1879 /* put block[] to dest[] */
1880 static inline void put_dct(MpegEncContext *s,
1881                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1882 {
1883     s->dct_unquantize_intra(s, block, i, qscale);
1884     s->idsp.idct_put(dest, line_size, block);
1885 }
1886
1887 /* add block[] to dest[] */
1888 static inline void add_dct(MpegEncContext *s,
1889                            int16_t *block, int i, uint8_t *dest, int line_size)
1890 {
1891     if (s->block_last_index[i] >= 0) {
1892         s->idsp.idct_add(dest, line_size, block);
1893     }
1894 }
1895
1896 static inline void add_dequant_dct(MpegEncContext *s,
1897                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1898 {
1899     if (s->block_last_index[i] >= 0) {
1900         s->dct_unquantize_inter(s, block, i, qscale);
1901
1902         s->idsp.idct_add(dest, line_size, block);
1903     }
1904 }
1905
1906 /**
1907  * Clean dc, ac, coded_block for the current non-intra MB.
1908  */
1909 void ff_clean_intra_table_entries(MpegEncContext *s)
1910 {
1911     int wrap = s->b8_stride;
1912     int xy = s->block_index[0];
1913
1914     s->dc_val[0][xy           ] =
1915     s->dc_val[0][xy + 1       ] =
1916     s->dc_val[0][xy     + wrap] =
1917     s->dc_val[0][xy + 1 + wrap] = 1024;
1918     /* ac pred */
1919     memset(s->ac_val[0][xy       ], 0, 32 * sizeof(int16_t));
1920     memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
1921     if (s->msmpeg4_version>=3) {
1922         s->coded_block[xy           ] =
1923         s->coded_block[xy + 1       ] =
1924         s->coded_block[xy     + wrap] =
1925         s->coded_block[xy + 1 + wrap] = 0;
1926     }
1927     /* chroma */
1928     wrap = s->mb_stride;
1929     xy = s->mb_x + s->mb_y * wrap;
1930     s->dc_val[1][xy] =
1931     s->dc_val[2][xy] = 1024;
1932     /* ac pred */
1933     memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
1934     memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
1935
1936     s->mbintra_table[xy]= 0;
1937 }
1938
1939 /* generic function called after a macroblock has been parsed by the
1940    decoder or after it has been encoded by the encoder.
1941
1942    Important variables used:
1943    s->mb_intra : true if intra macroblock
1944    s->mv_dir   : motion vector direction
1945    s->mv_type  : motion vector type
1946    s->mv       : motion vector
1947    s->interlaced_dct : true if interlaced dct used (mpeg2)
1948  */
1949 static av_always_inline
1950 void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
1951                             int lowres_flag, int is_mpeg12)
1952 {
1953     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
1954
1955     if (CONFIG_XVMC &&
1956         s->avctx->hwaccel && s->avctx->hwaccel->decode_mb) {
1957         s->avctx->hwaccel->decode_mb(s);//xvmc uses pblocks
1958         return;
1959     }
1960
1961     if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
1962        /* print DCT coefficients */
1963        int i,j;
1964        av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
1965        for(i=0; i<6; i++){
1966            for(j=0; j<64; j++){
1967                av_log(s->avctx, AV_LOG_DEBUG, "%5d",
1968                       block[i][s->idsp.idct_permutation[j]]);
1969            }
1970            av_log(s->avctx, AV_LOG_DEBUG, "\n");
1971        }
1972     }
1973
1974     s->current_picture.qscale_table[mb_xy] = s->qscale;
1975
1976     /* update DC predictors for P macroblocks */
1977     if (!s->mb_intra) {
1978         if (!is_mpeg12 && (s->h263_pred || s->h263_aic)) {
1979             if(s->mbintra_table[mb_xy])
1980                 ff_clean_intra_table_entries(s);
1981         } else {
1982             s->last_dc[0] =
1983             s->last_dc[1] =
1984             s->last_dc[2] = 128 << s->intra_dc_precision;
1985         }
1986     }
1987     else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
1988         s->mbintra_table[mb_xy]=1;
1989
1990     if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) || s->frame_skip_threshold || s->frame_skip_factor ||
1991         !(s->encoding && (s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
1992           s->avctx->mb_decision != FF_MB_DECISION_RD)) { // FIXME precalc
1993         uint8_t *dest_y, *dest_cb, *dest_cr;
1994         int dct_linesize, dct_offset;
1995         op_pixels_func (*op_pix)[4];
1996         qpel_mc_func (*op_qpix)[16];
1997         const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
1998         const int uvlinesize = s->current_picture.f->linesize[1];
1999         const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band || lowres_flag;
2000         const int block_size= lowres_flag ? 8>>s->avctx->lowres : 8;
2001
2002         /* avoid copy if macroblock skipped in last frame too */
2003         /* skip only during decoding as we might trash the buffers during encoding a bit */
2004         if(!s->encoding){
2005             uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
2006
2007             if (s->mb_skipped) {
2008                 s->mb_skipped= 0;
2009                 av_assert2(s->pict_type!=AV_PICTURE_TYPE_I);
2010                 *mbskip_ptr = 1;
2011             } else if(!s->current_picture.reference) {
2012                 *mbskip_ptr = 1;
2013             } else{
2014                 *mbskip_ptr = 0; /* not skipped */
2015             }
2016         }
2017
2018         dct_linesize = linesize << s->interlaced_dct;
2019         dct_offset   = s->interlaced_dct ? linesize : linesize * block_size;
2020
2021         if(readable){
2022             dest_y=  s->dest[0];
2023             dest_cb= s->dest[1];
2024             dest_cr= s->dest[2];
2025         }else{
2026             dest_y = s->sc.b_scratchpad;
2027             dest_cb= s->sc.b_scratchpad+16*linesize;
2028             dest_cr= s->sc.b_scratchpad+32*linesize;
2029         }
2030
2031         if (!s->mb_intra) {
2032             /* motion handling */
2033             /* decoding or more than one mb_type (MC was already done otherwise) */
2034             if(!s->encoding){
2035
2036                 if(HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
2037                     if (s->mv_dir & MV_DIR_FORWARD) {
2038                         ff_thread_await_progress(&s->last_picture_ptr->tf,
2039                                                  lowest_referenced_row(s, 0),
2040                                                  0);
2041                     }
2042                     if (s->mv_dir & MV_DIR_BACKWARD) {
2043                         ff_thread_await_progress(&s->next_picture_ptr->tf,
2044                                                  lowest_referenced_row(s, 1),
2045                                                  0);
2046                     }
2047                 }
2048
2049                 if(lowres_flag){
2050                     h264_chroma_mc_func *op_pix = s->h264chroma.put_h264_chroma_pixels_tab;
2051
2052                     if (s->mv_dir & MV_DIR_FORWARD) {
2053                         MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix);
2054                         op_pix = s->h264chroma.avg_h264_chroma_pixels_tab;
2055                     }
2056                     if (s->mv_dir & MV_DIR_BACKWARD) {
2057                         MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix);
2058                     }
2059                 }else{
2060                     op_qpix = s->me.qpel_put;
2061                     if ((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
2062                         op_pix = s->hdsp.put_pixels_tab;
2063                     }else{
2064                         op_pix = s->hdsp.put_no_rnd_pixels_tab;
2065                     }
2066                     if (s->mv_dir & MV_DIR_FORWARD) {
2067                         ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix, op_qpix);
2068                         op_pix = s->hdsp.avg_pixels_tab;
2069                         op_qpix= s->me.qpel_avg;
2070                     }
2071                     if (s->mv_dir & MV_DIR_BACKWARD) {
2072                         ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix, op_qpix);
2073                     }
2074                 }
2075             }
2076
2077             /* skip dequant / idct if we are really late ;) */
2078             if(s->avctx->skip_idct){
2079                 if(  (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
2080                    ||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
2081                    || s->avctx->skip_idct >= AVDISCARD_ALL)
2082                     goto skip_idct;
2083             }
2084
2085             /* add dct residue */
2086             if(s->encoding || !(   s->msmpeg4_version || s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO
2087                                 || (s->codec_id==AV_CODEC_ID_MPEG4 && !s->mpeg_quant))){
2088                 add_dequant_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
2089                 add_dequant_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
2090                 add_dequant_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
2091                 add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2092
2093                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2094                     if (s->chroma_y_shift){
2095                         add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2096                         add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2097                     }else{
2098                         dct_linesize >>= 1;
2099                         dct_offset >>=1;
2100                         add_dequant_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
2101                         add_dequant_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
2102                         add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2103                         add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2104                     }
2105                 }
2106             } else if(is_mpeg12 || (s->codec_id != AV_CODEC_ID_WMV2)){
2107                 add_dct(s, block[0], 0, dest_y                          , dct_linesize);
2108                 add_dct(s, block[1], 1, dest_y              + block_size, dct_linesize);
2109                 add_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize);
2110                 add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
2111
2112                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2113                     if(s->chroma_y_shift){//Chroma420
2114                         add_dct(s, block[4], 4, dest_cb, uvlinesize);
2115                         add_dct(s, block[5], 5, dest_cr, uvlinesize);
2116                     }else{
2117                         //chroma422
2118                         dct_linesize = uvlinesize << s->interlaced_dct;
2119                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2120
2121                         add_dct(s, block[4], 4, dest_cb, dct_linesize);
2122                         add_dct(s, block[5], 5, dest_cr, dct_linesize);
2123                         add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
2124                         add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
2125                         if(!s->chroma_x_shift){//Chroma444
2126                             add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
2127                             add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
2128                             add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
2129                             add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
2130                         }
2131                     }
2132                 }//fi gray
2133             }
2134             else if (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) {
2135                 ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
2136             }
2137         } else {
2138             /* Only MPEG-4 Simple Studio Profile is supported in > 8-bit mode.
2139                TODO: Integrate 10-bit properly into mpegvideo.c so that ER works properly */
2140             if (s->avctx->bits_per_raw_sample > 8){
2141                 const int act_block_size = block_size * 2;
2142
2143                 if(s->dpcm_direction == 0) {
2144                     s->idsp.idct_put(dest_y,                           dct_linesize, (int16_t*)(*s->block32)[0]);
2145                     s->idsp.idct_put(dest_y              + act_block_size, dct_linesize, (int16_t*)(*s->block32)[1]);
2146                     s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, (int16_t*)(*s->block32)[2]);
2147                     s->idsp.idct_put(dest_y + dct_offset + act_block_size, dct_linesize, (int16_t*)(*s->block32)[3]);
2148
2149                     dct_linesize = uvlinesize << s->interlaced_dct;
2150                     dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2151
2152                     s->idsp.idct_put(dest_cb,              dct_linesize, (int16_t*)(*s->block32)[4]);
2153                     s->idsp.idct_put(dest_cr,              dct_linesize, (int16_t*)(*s->block32)[5]);
2154                     s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, (int16_t*)(*s->block32)[6]);
2155                     s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, (int16_t*)(*s->block32)[7]);
2156                     if(!s->chroma_x_shift){//Chroma444
2157                         s->idsp.idct_put(dest_cb + act_block_size,              dct_linesize, (int16_t*)(*s->block32)[8]);
2158                         s->idsp.idct_put(dest_cr + act_block_size,              dct_linesize, (int16_t*)(*s->block32)[9]);
2159                         s->idsp.idct_put(dest_cb + act_block_size + dct_offset, dct_linesize, (int16_t*)(*s->block32)[10]);
2160                         s->idsp.idct_put(dest_cr + act_block_size + dct_offset, dct_linesize, (int16_t*)(*s->block32)[11]);
2161                     }
2162                 } else if(s->dpcm_direction == 1) {
2163                     int i, w, h;
2164                     uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2165                     int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2166                     for(i = 0; i < 3; i++) {
2167                         int idx = 0;
2168                         int vsub = i ? s->chroma_y_shift : 0;
2169                         int hsub = i ? s->chroma_x_shift : 0;
2170                         for(h = 0; h < (16 >> vsub); h++){
2171                             for(w = 0; w < (16 >> hsub); w++)
2172                                 dest_pcm[i][w] = (*s->dpcm_macroblock)[i][idx++];
2173                             dest_pcm[i] += linesize[i] / 2;
2174                         }
2175                     }
2176                 } else if(s->dpcm_direction == -1) {
2177                     int i, w, h;
2178                     uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2179                     int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2180                     for(i = 0; i < 3; i++) {
2181                         int idx = 0;
2182                         int vsub = i ? s->chroma_y_shift : 0;
2183                         int hsub = i ? s->chroma_x_shift : 0;
2184                         dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub) - 1);
2185                         for(h = (16 >> vsub)-1; h >= 1; h--){
2186                             for(w = (16 >> hsub)-1; w >= 1; w--)
2187                                 dest_pcm[i][w] = (*s->dpcm_macroblock)[i][idx++];
2188                             dest_pcm[i] -= linesize[i] / 2;
2189                         }
2190                     }
2191                 }
2192             }
2193             /* dct only in intra block */
2194             else if(s->encoding || !(s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO)){
2195                 put_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
2196                 put_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
2197                 put_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
2198                 put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2199
2200                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2201                     if(s->chroma_y_shift){
2202                         put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2203                         put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2204                     }else{
2205                         dct_offset >>=1;
2206                         dct_linesize >>=1;
2207                         put_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
2208                         put_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
2209                         put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2210                         put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2211                     }
2212                 }
2213             }else{
2214                 s->idsp.idct_put(dest_y,                           dct_linesize, block[0]);
2215                 s->idsp.idct_put(dest_y              + block_size, dct_linesize, block[1]);
2216                 s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, block[2]);
2217                 s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
2218
2219                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2220                     if(s->chroma_y_shift){
2221                         s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
2222                         s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
2223                     }else{
2224
2225                         dct_linesize = uvlinesize << s->interlaced_dct;
2226                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2227
2228                         s->idsp.idct_put(dest_cb,              dct_linesize, block[4]);
2229                         s->idsp.idct_put(dest_cr,              dct_linesize, block[5]);
2230                         s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
2231                         s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
2232                         if(!s->chroma_x_shift){//Chroma444
2233                             s->idsp.idct_put(dest_cb + block_size,              dct_linesize, block[8]);
2234                             s->idsp.idct_put(dest_cr + block_size,              dct_linesize, block[9]);
2235                             s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
2236                             s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
2237                         }
2238                     }
2239                 }//gray
2240             }
2241         }
2242 skip_idct:
2243         if(!readable){
2244             s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y ,   linesize,16);
2245             if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2246                 s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
2247                 s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize,16 >> s->chroma_y_shift);
2248             }
2249         }
2250     }
2251 }
2252
2253 void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
2254 {
2255 #if !CONFIG_SMALL
2256     if(s->out_format == FMT_MPEG1) {
2257         if(s->avctx->lowres) mpv_reconstruct_mb_internal(s, block, 1, 1);
2258         else                 mpv_reconstruct_mb_internal(s, block, 0, 1);
2259     } else
2260 #endif
2261     if(s->avctx->lowres) mpv_reconstruct_mb_internal(s, block, 1, 0);
2262     else                  mpv_reconstruct_mb_internal(s, block, 0, 0);
2263 }
2264
2265 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
2266 {
2267     ff_draw_horiz_band(s->avctx, s->current_picture_ptr->f,
2268                        s->last_picture_ptr ? s->last_picture_ptr->f : NULL, y, h, s->picture_structure,
2269                        s->first_field, s->low_delay);
2270 }
2271
2272 void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
2273     const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
2274     const int uvlinesize = s->current_picture.f->linesize[1];
2275     const int width_of_mb = (4 + (s->avctx->bits_per_raw_sample > 8)) - s->avctx->lowres;
2276     const int height_of_mb = 4 - s->avctx->lowres;
2277
2278     s->block_index[0]= s->b8_stride*(s->mb_y*2    ) - 2 + s->mb_x*2;
2279     s->block_index[1]= s->b8_stride*(s->mb_y*2    ) - 1 + s->mb_x*2;
2280     s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
2281     s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
2282     s->block_index[4]= s->mb_stride*(s->mb_y + 1)                + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
2283     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;
2284     //block_index is not used by mpeg2, so it is not affected by chroma_format
2285
2286     s->dest[0] = s->current_picture.f->data[0] + (int)((s->mb_x - 1U) <<  width_of_mb);
2287     s->dest[1] = s->current_picture.f->data[1] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
2288     s->dest[2] = s->current_picture.f->data[2] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
2289
2290     if(!(s->pict_type==AV_PICTURE_TYPE_B && s->avctx->draw_horiz_band && s->picture_structure==PICT_FRAME))
2291     {
2292         if(s->picture_structure==PICT_FRAME){
2293         s->dest[0] += s->mb_y *   linesize << height_of_mb;
2294         s->dest[1] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
2295         s->dest[2] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
2296         }else{
2297             s->dest[0] += (s->mb_y>>1) *   linesize << height_of_mb;
2298             s->dest[1] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
2299             s->dest[2] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
2300             av_assert1((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
2301         }
2302     }
2303 }
2304
2305 void ff_mpeg_flush(AVCodecContext *avctx){
2306     int i;
2307     MpegEncContext *s = avctx->priv_data;
2308
2309     if (!s || !s->picture)
2310         return;
2311
2312     for (i = 0; i < MAX_PICTURE_COUNT; i++)
2313         ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
2314     s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
2315
2316     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
2317     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
2318     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
2319
2320     s->mb_x= s->mb_y= 0;
2321     s->closed_gop= 0;
2322
2323     s->parse_context.state= -1;
2324     s->parse_context.frame_start_found= 0;
2325     s->parse_context.overread= 0;
2326     s->parse_context.overread_index= 0;
2327     s->parse_context.index= 0;
2328     s->parse_context.last_index= 0;
2329     s->bitstream_buffer_size=0;
2330     s->pp_time=0;
2331 }
2332
2333 /**
2334  * set qscale and update qscale dependent variables.
2335  */
2336 void ff_set_qscale(MpegEncContext * s, int qscale)
2337 {
2338     if (qscale < 1)
2339         qscale = 1;
2340     else if (qscale > 31)
2341         qscale = 31;
2342
2343     s->qscale = qscale;
2344     s->chroma_qscale= s->chroma_qscale_table[qscale];
2345
2346     s->y_dc_scale= s->y_dc_scale_table[ qscale ];
2347     s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ];
2348 }
2349
2350 void ff_mpv_report_decode_progress(MpegEncContext *s)
2351 {
2352     if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred)
2353         ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0);
2354 }