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