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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         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.map,
 376                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 377         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.score_map,
 378                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 379         if (s->noise_reduction) {
 380             FF_ALLOCZ_OR_GOTO(s->avctx, s->dct_error_sum,
 381                               2 * 64 * sizeof(int), fail)
 382         }
 383     }
 384     FF_ALLOCZ_OR_GOTO(s->avctx, s->blocks, 64 * 12 * 2 * sizeof(int16_t), fail)
 385     s->block = s->blocks[0];
 386
 387     for (i = 0; i < 12; i++) {
 388         s->pblocks[i] = &s->block[i];
 389     }
 390
 391     FF_ALLOCZ_OR_GOTO(s->avctx, s->block32, sizeof(*s->block32), fail)
 392     s->dpcm_direction = 0;
 393     FF_ALLOCZ_OR_GOTO(s->avctx, s->dpcm_macroblock, sizeof(*s->dpcm_macroblock), fail)
 394
 395     if (s->avctx->codec_tag == AV_RL32("VCR2")) {
 396         // exchange uv
 397         FFSWAP(void *, s->pblocks[4], s->pblocks[5]);
 398     }
 399
 400     if (s->out_format == FMT_H263) {
 401         /* ac values */
 402         FF_ALLOCZ_OR_GOTO(s->avctx, s->ac_val_base,
 403                           yc_size * sizeof(int16_t) * 16, fail);
 404         s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
 405         s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
 406         s->ac_val[2] = s->ac_val[1] + c_size;
 407     }
 408
 409     return 0;
 410 fail:
 411     return AVERROR(ENOMEM); // free() through ff_mpv_common_end()
 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  * Set the given MpegEncContext to defaults for decoding.
 664  * the changed fields will not depend upon
 665  * the prior state of the MpegEncContext.
 666  */
 667 void ff_mpv_decode_defaults(MpegEncContext *s)
 668 {
 669     ff_mpv_common_defaults(s);
 670 }
 671
 672 void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
 673 {
 674     s->avctx           = avctx;
 675     s->width           = avctx->coded_width;
 676     s->height          = avctx->coded_height;
 677     s->codec_id        = avctx->codec->id;
 678     s->workaround_bugs = avctx->workaround_bugs;
 679
 680     /* convert fourcc to upper case */
 681     s->codec_tag          = avpriv_toupper4(avctx->codec_tag);
 682 }
 683
 684 /**
 685  * Initialize and allocates MpegEncContext fields dependent on the resolution.
 686  */
 687 static int init_context_frame(MpegEncContext *s)
 688 {
 689     int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;
 690
 691     s->mb_width   = (s->width + 15) / 16;
 692     s->mb_stride  = s->mb_width + 1;
 693     s->b8_stride  = s->mb_width * 2 + 1;
 694     mb_array_size = s->mb_height * s->mb_stride;
 695     mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
 696
 697     /* set default edge pos, will be overridden
 698      * in decode_header if needed */
 699     s->h_edge_pos = s->mb_width * 16;
 700     s->v_edge_pos = s->mb_height * 16;
 701
 702     s->mb_num     = s->mb_width * s->mb_height;
 703
 704     s->block_wrap[0] =
 705     s->block_wrap[1] =
 706     s->block_wrap[2] =
 707     s->block_wrap[3] = s->b8_stride;
 708     s->block_wrap[4] =
 709     s->block_wrap[5] = s->mb_stride;
 710
 711     y_size  = s->b8_stride * (2 * s->mb_height + 1);
 712     c_size  = s->mb_stride * (s->mb_height + 1);
 713     yc_size = y_size + 2   * c_size;
 714
 715     if (s->mb_height & 1)
 716         yc_size += 2*s->b8_stride + 2*s->mb_stride;
 717
 718     FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
 719                       fail); // error resilience code looks cleaner with this
 720     for (y = 0; y < s->mb_height; y++)
 721         for (x = 0; x < s->mb_width; x++)
 722             s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
 723
 724     s->mb_index2xy[s->mb_height * s->mb_width] = (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
 725
 726     if (s->encoding) {
 727         /* Allocate MV tables */
 728         FF_ALLOCZ_OR_GOTO(s->avctx, s->p_mv_table_base,                 mv_table_size * 2 * sizeof(int16_t), fail)
 729         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_forw_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
 730         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_back_mv_table_base,            mv_table_size * 2 * sizeof(int16_t), fail)
 731         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_forw_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
 732         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_back_mv_table_base,      mv_table_size * 2 * sizeof(int16_t), fail)
 733         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_direct_mv_table_base,          mv_table_size * 2 * sizeof(int16_t), fail)
 734         s->p_mv_table            = s->p_mv_table_base + s->mb_stride + 1;
 735         s->b_forw_mv_table       = s->b_forw_mv_table_base + s->mb_stride + 1;
 736         s->b_back_mv_table       = s->b_back_mv_table_base + s->mb_stride + 1;
 737         s->b_bidir_forw_mv_table = s->b_bidir_forw_mv_table_base + s->mb_stride + 1;
 738         s->b_bidir_back_mv_table = s->b_bidir_back_mv_table_base + s->mb_stride + 1;
 739         s->b_direct_mv_table     = s->b_direct_mv_table_base + s->mb_stride + 1;
 740
 741         /* Allocate MB type table */
 742         FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_type, mb_array_size * sizeof(uint16_t), fail) // needed for encoding
 743
 744         FF_ALLOCZ_OR_GOTO(s->avctx, s->lambda_table, mb_array_size * sizeof(int), fail)
 745
 746         FF_ALLOC_OR_GOTO(s->avctx, s->cplx_tab,
 747                          mb_array_size * sizeof(float), fail);
 748         FF_ALLOC_OR_GOTO(s->avctx, s->bits_tab,
 749                          mb_array_size * sizeof(float), fail);
 750
 751     }
 752
 753     if (s->codec_id == AV_CODEC_ID_MPEG4 ||
 754         (s->avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)) {
 755         /* interlaced direct mode decoding tables */
 756         for (i = 0; i < 2; i++) {
 757             int j, k;
 758             for (j = 0; j < 2; j++) {
 759                 for (k = 0; k < 2; k++) {
 760                     FF_ALLOCZ_OR_GOTO(s->avctx,
 761                                       s->b_field_mv_table_base[i][j][k],
 762                                       mv_table_size * 2 * sizeof(int16_t),
 763                                       fail);
 764                     s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] +
 765                                                    s->mb_stride + 1;
 766                 }
 767                 FF_ALLOCZ_OR_GOTO(s->avctx, s->b_field_select_table [i][j], mb_array_size * 2 * sizeof(uint8_t), fail)
 768                 FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_mv_table_base[i][j], mv_table_size * 2 * sizeof(int16_t), fail)
 769                 s->p_field_mv_table[i][j] = s->p_field_mv_table_base[i][j] + s->mb_stride + 1;
 770             }
 771             FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_select_table[i], mb_array_size * 2 * sizeof(uint8_t), fail)
 772         }
 773     }
 774     if (s->out_format == FMT_H263) {
 775         /* cbp values */
 776         FF_ALLOCZ_OR_GOTO(s->avctx, s->coded_block_base, y_size + (s->mb_height&1)*2*s->b8_stride, fail);
 777         s->coded_block = s->coded_block_base + s->b8_stride + 1;
 778
 779         /* cbp, ac_pred, pred_dir */
 780         FF_ALLOCZ_OR_GOTO(s->avctx, s->cbp_table     , mb_array_size * sizeof(uint8_t), fail);
 781         FF_ALLOCZ_OR_GOTO(s->avctx, s->pred_dir_table, mb_array_size * sizeof(uint8_t), fail);
 782     }
 783
 784     if (s->h263_pred || s->h263_plus || !s->encoding) {
 785         /* dc values */
 786         // MN: we need these for error resilience of intra-frames
 787         FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base, yc_size * sizeof(int16_t), fail);
 788         s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
 789         s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
 790         s->dc_val[2] = s->dc_val[1] + c_size;
 791         for (i = 0; i < yc_size; i++)
 792             s->dc_val_base[i] = 1024;
 793     }
 794
 795     /* which mb is an intra block */
 796     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
 797     memset(s->mbintra_table, 1, mb_array_size);
 798
 799     /* init macroblock skip table */
 800     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
 801     // Note the + 1 is for a quicker MPEG-4 slice_end detection
 802
 803     return ff_mpeg_er_init(s);
 804 fail:
 805     return AVERROR(ENOMEM);
 806 }
 807
 808 static void clear_context(MpegEncContext *s)
 809 {
 810     int i, j, k;
 811
 812     memset(&s->next_picture, 0, sizeof(s->next_picture));
 813     memset(&s->last_picture, 0, sizeof(s->last_picture));
 814     memset(&s->current_picture, 0, sizeof(s->current_picture));
 815     memset(&s->new_picture, 0, sizeof(s->new_picture));
 816
 817     memset(s->thread_context, 0, sizeof(s->thread_context));
 818
 819     s->me.map = NULL;
 820     s->me.score_map = NULL;
 821     s->dct_error_sum = NULL;
 822     s->block = NULL;
 823     s->blocks = NULL;
 824     s->block32 = NULL;
 825     memset(s->pblocks, 0, sizeof(s->pblocks));
 826     s->dpcm_direction = 0;
 827     s->dpcm_macroblock = NULL;
 828     s->ac_val_base = NULL;
 829     s->ac_val[0] =
 830     s->ac_val[1] =
 831     s->ac_val[2] =NULL;
 832     s->sc.edge_emu_buffer = NULL;
 833     s->me.scratchpad = NULL;
 834     s->me.temp =
 835     s->sc.rd_scratchpad =
 836     s->sc.b_scratchpad =
 837     s->sc.obmc_scratchpad = NULL;
 838
 839
 840     s->bitstream_buffer = NULL;
 841     s->allocated_bitstream_buffer_size = 0;
 842     s->picture          = NULL;
 843     s->mb_type          = NULL;
 844     s->p_mv_table_base  = NULL;
 845     s->b_forw_mv_table_base = NULL;
 846     s->b_back_mv_table_base = NULL;
 847     s->b_bidir_forw_mv_table_base = NULL;
 848     s->b_bidir_back_mv_table_base = NULL;
 849     s->b_direct_mv_table_base = NULL;
 850     s->p_mv_table            = NULL;
 851     s->b_forw_mv_table       = NULL;
 852     s->b_back_mv_table       = NULL;
 853     s->b_bidir_forw_mv_table = NULL;
 854     s->b_bidir_back_mv_table = NULL;
 855     s->b_direct_mv_table     = NULL;
 856     for (i = 0; i < 2; i++) {
 857         for (j = 0; j < 2; j++) {
 858             for (k = 0; k < 2; k++) {
 859                 s->b_field_mv_table_base[i][j][k] = NULL;
 860                 s->b_field_mv_table[i][j][k] = NULL;
 861             }
 862             s->b_field_select_table[i][j] = NULL;
 863             s->p_field_mv_table_base[i][j] = NULL;
 864             s->p_field_mv_table[i][j] = NULL;
 865         }
 866         s->p_field_select_table[i] = NULL;
 867     }
 868
 869     s->dc_val_base = NULL;
 870     s->coded_block_base = NULL;
 871     s->mbintra_table = NULL;
 872     s->cbp_table = NULL;
 873     s->pred_dir_table = NULL;
 874
 875     s->mbskip_table = NULL;
 876
 877     s->er.error_status_table = NULL;
 878     s->er.er_temp_buffer = NULL;
 879     s->mb_index2xy = NULL;
 880     s->lambda_table = NULL;
 881
 882     s->cplx_tab = NULL;
 883     s->bits_tab = NULL;
 884 }
 885
 886 /**
 887  * init common structure for both encoder and decoder.
 888  * this assumes that some variables like width/height are already set
 889  */
 890 av_cold int ff_mpv_common_init(MpegEncContext *s)
 891 {
 892     int i, ret;
 893     int nb_slices = (HAVE_THREADS &&
 894                      s->avctx->active_thread_type & FF_THREAD_SLICE) ?
 895                     s->avctx->thread_count : 1;
 896
 897     clear_context(s);
 898
 899     if (s->encoding && s->avctx->slices)
 900         nb_slices = s->avctx->slices;
 901
 902     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
 903         s->mb_height = (s->height + 31) / 32 * 2;
 904     else
 905         s->mb_height = (s->height + 15) / 16;
 906
 907     if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
 908         av_log(s->avctx, AV_LOG_ERROR,
 909                "decoding to AV_PIX_FMT_NONE is not supported.\n");
 910         return AVERROR(EINVAL);
 911     }
 912
 913     if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
 914         int max_slices;
 915         if (s->mb_height)
 916             max_slices = FFMIN(MAX_THREADS, s->mb_height);
 917         else
 918             max_slices = MAX_THREADS;
 919         av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
 920                " reducing to %d\n", nb_slices, max_slices);
 921         nb_slices = max_slices;
 922     }
 923
 924     if ((s->width || s->height) &&
 925         av_image_check_size(s->width, s->height, 0, s->avctx))
 926         return AVERROR(EINVAL);
 927
 928     dct_init(s);
 929
 930     /* set chroma shifts */
 931     ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
 932                                            &s->chroma_x_shift,
 933                                            &s->chroma_y_shift);
 934     if (ret)
 935         return ret;
 936
 937     FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
 938                       MAX_PICTURE_COUNT * sizeof(Picture), fail_nomem);
 939     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 940         s->picture[i].f = av_frame_alloc();
 941         if (!s->picture[i].f)
 942             goto fail_nomem;
 943     }
 944     s->next_picture.f = av_frame_alloc();
 945     if (!s->next_picture.f)
 946         goto fail_nomem;
 947     s->last_picture.f = av_frame_alloc();
 948     if (!s->last_picture.f)
 949         goto fail_nomem;
 950     s->current_picture.f = av_frame_alloc();
 951     if (!s->current_picture.f)
 952         goto fail_nomem;
 953     s->new_picture.f = av_frame_alloc();
 954     if (!s->new_picture.f)
 955         goto fail_nomem;
 956
 957     if ((ret = init_context_frame(s)))
 958         goto fail_nomem;
 959
 960     s->parse_context.state = -1;
 961
 962     s->context_initialized = 1;
 963     memset(s->thread_context, 0, sizeof(s->thread_context));
 964     s->thread_context[0]   = s;
 965
 966 //     if (s->width && s->height) {
 967     if (nb_slices > 1) {
 968         for (i = 0; i < nb_slices; i++) {
 969             if (i) {
 970                 s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
 971                 if (!s->thread_context[i])
 972                     goto fail_nomem;
 973             }
 974             if ((ret = init_duplicate_context(s->thread_context[i])) < 0)
 975                 goto fail;
 976             s->thread_context[i]->start_mb_y =
 977                 (s->mb_height * (i) + nb_slices / 2) / nb_slices;
 978             s->thread_context[i]->end_mb_y   =
 979                 (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
 980         }
 981     } else {
 982         if ((ret = init_duplicate_context(s)) < 0)
 983             goto fail;
 984         s->start_mb_y = 0;
 985         s->end_mb_y   = s->mb_height;
 986     }
 987     s->slice_context_count = nb_slices;
 988 //     }
 989
 990     return 0;
 991  fail_nomem:
 992     ret = AVERROR(ENOMEM);
 993  fail:
 994     return ret;
 995 }
 996
 997 /**
 998  * Frees and resets MpegEncContext fields depending on the resolution.
 999  * Is used during resolution changes to avoid a full reinitialization of the
1000  * codec.
1001  */
1002 static void free_context_frame(MpegEncContext *s)
1003 {
1004     int i, j, k;
1005
1006     av_freep(&s->mb_type);
1007     av_freep(&s->p_mv_table_base);
1008     av_freep(&s->b_forw_mv_table_base);
1009     av_freep(&s->b_back_mv_table_base);
1010     av_freep(&s->b_bidir_forw_mv_table_base);
1011     av_freep(&s->b_bidir_back_mv_table_base);
1012     av_freep(&s->b_direct_mv_table_base);
1013     s->p_mv_table            = NULL;
1014     s->b_forw_mv_table       = NULL;
1015     s->b_back_mv_table       = NULL;
1016     s->b_bidir_forw_mv_table = NULL;
1017     s->b_bidir_back_mv_table = NULL;
1018     s->b_direct_mv_table     = NULL;
1019     for (i = 0; i < 2; i++) {
1020         for (j = 0; j < 2; j++) {
1021             for (k = 0; k < 2; k++) {
1022                 av_freep(&s->b_field_mv_table_base[i][j][k]);
1023                 s->b_field_mv_table[i][j][k] = NULL;
1024             }
1025             av_freep(&s->b_field_select_table[i][j]);
1026             av_freep(&s->p_field_mv_table_base[i][j]);
1027             s->p_field_mv_table[i][j] = NULL;
1028         }
1029         av_freep(&s->p_field_select_table[i]);
1030     }
1031
1032     av_freep(&s->dc_val_base);
1033     av_freep(&s->coded_block_base);
1034     av_freep(&s->mbintra_table);
1035     av_freep(&s->cbp_table);
1036     av_freep(&s->pred_dir_table);
1037
1038     av_freep(&s->mbskip_table);
1039
1040     av_freep(&s->er.error_status_table);
1041     av_freep(&s->er.er_temp_buffer);
1042     av_freep(&s->mb_index2xy);
1043     av_freep(&s->lambda_table);
1044
1045     av_freep(&s->cplx_tab);
1046     av_freep(&s->bits_tab);
1047
1048     s->linesize = s->uvlinesize = 0;
1049 }
1050
1051 int ff_mpv_common_frame_size_change(MpegEncContext *s)
1052 {
1053     int i, err = 0;
1054
1055     if (!s->context_initialized)
1056         return AVERROR(EINVAL);
1057
1058     if (s->slice_context_count > 1) {
1059         for (i = 0; i < s->slice_context_count; i++) {
1060             free_duplicate_context(s->thread_context[i]);
1061         }
1062         for (i = 1; i < s->slice_context_count; i++) {
1063             av_freep(&s->thread_context[i]);
1064         }
1065     } else
1066         free_duplicate_context(s);
1067
1068     free_context_frame(s);
1069
1070     if (s->picture)
1071         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1072                 s->picture[i].needs_realloc = 1;
1073         }
1074
1075     s->last_picture_ptr         =
1076     s->next_picture_ptr         =
1077     s->current_picture_ptr      = NULL;
1078
1079     // init
1080     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
1081         s->mb_height = (s->height + 31) / 32 * 2;
1082     else
1083         s->mb_height = (s->height + 15) / 16;
1084
1085     if ((s->width || s->height) &&
1086         (err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
1087         goto fail;
1088
1089     if ((err = init_context_frame(s)))
1090         goto fail;
1091
1092     memset(s->thread_context, 0, sizeof(s->thread_context));
1093     s->thread_context[0]   = s;
1094
1095     if (s->width && s->height) {
1096         int nb_slices = s->slice_context_count;
1097         if (nb_slices > 1) {
1098             for (i = 0; i < nb_slices; i++) {
1099                 if (i) {
1100                     s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
1101                     if (!s->thread_context[i]) {
1102                         err = AVERROR(ENOMEM);
1103                         goto fail;
1104                     }
1105                 }
1106                 if ((err = init_duplicate_context(s->thread_context[i])) < 0)
1107                     goto fail;
1108                 s->thread_context[i]->start_mb_y =
1109                     (s->mb_height * (i) + nb_slices / 2) / nb_slices;
1110                 s->thread_context[i]->end_mb_y   =
1111                     (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
1112             }
1113         } else {
1114             err = init_duplicate_context(s);
1115             if (err < 0)
1116                 goto fail;
1117             s->start_mb_y = 0;
1118             s->end_mb_y   = s->mb_height;
1119         }
1120         s->slice_context_count = nb_slices;
1121     }
1122
1123     return 0;
1124  fail:
1125     return err;
1126 }
1127
1128 /* init common structure for both encoder and decoder */
1129 void ff_mpv_common_end(MpegEncContext *s)
1130 {
1131     int i;
1132
1133     if (!s)
1134         return ;
1135
1136     if (s->slice_context_count > 1) {
1137         for (i = 0; i < s->slice_context_count; i++) {
1138             free_duplicate_context(s->thread_context[i]);
1139         }
1140         for (i = 1; i < s->slice_context_count; i++) {
1141             av_freep(&s->thread_context[i]);
1142         }
1143         s->slice_context_count = 1;
1144     } else free_duplicate_context(s);
1145
1146     av_freep(&s->parse_context.buffer);
1147     s->parse_context.buffer_size = 0;
1148
1149     av_freep(&s->bitstream_buffer);
1150     s->allocated_bitstream_buffer_size = 0;
1151
1152     if (!s->avctx)
1153         return;
1154
1155     if (s->picture) {
1156         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1157             ff_free_picture_tables(&s->picture[i]);
1158             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1159             av_frame_free(&s->picture[i].f);
1160         }
1161     }
1162     av_freep(&s->picture);
1163     ff_free_picture_tables(&s->last_picture);
1164     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1165     av_frame_free(&s->last_picture.f);
1166     ff_free_picture_tables(&s->current_picture);
1167     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1168     av_frame_free(&s->current_picture.f);
1169     ff_free_picture_tables(&s->next_picture);
1170     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1171     av_frame_free(&s->next_picture.f);
1172     ff_free_picture_tables(&s->new_picture);
1173     ff_mpeg_unref_picture(s->avctx, &s->new_picture);
1174     av_frame_free(&s->new_picture.f);
1175
1176     free_context_frame(s);
1177
1178     s->context_initialized      = 0;
1179     s->last_picture_ptr         =
1180     s->next_picture_ptr         =
1181     s->current_picture_ptr      = NULL;
1182     s->linesize = s->uvlinesize = 0;
1183 }
1184
1185
1186 static void gray_frame(AVFrame *frame)
1187 {
1188     int i, h_chroma_shift, v_chroma_shift;
1189
1190     av_pix_fmt_get_chroma_sub_sample(frame->format, &h_chroma_shift, &v_chroma_shift);
1191
1192     for(i=0; i<frame->height; i++)
1193         memset(frame->data[0] + frame->linesize[0]*i, 0x80, frame->width);
1194     for(i=0; i<AV_CEIL_RSHIFT(frame->height, v_chroma_shift); i++) {
1195         memset(frame->data[1] + frame->linesize[1]*i,
1196                0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1197         memset(frame->data[2] + frame->linesize[2]*i,
1198                0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
1199     }
1200 }
1201
1202 /**
1203  * generic function called after decoding
1204  * the header and before a frame is decoded.
1205  */
1206 int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
1207 {
1208     int i, ret;
1209     Picture *pic;
1210     s->mb_skipped = 0;
1211
1212     if (!ff_thread_can_start_frame(avctx)) {
1213         av_log(avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
1214         return -1;
1215     }
1216
1217     /* mark & release old frames */
1218     if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
1219         s->last_picture_ptr != s->next_picture_ptr &&
1220         s->last_picture_ptr->f->buf[0]) {
1221         ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr);
1222     }
1223
1224     /* release forgotten pictures */
1225     /* if (MPEG-124 / H.263) */
1226     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1227         if (&s->picture[i] != s->last_picture_ptr &&
1228             &s->picture[i] != s->next_picture_ptr &&
1229             s->picture[i].reference && !s->picture[i].needs_realloc) {
1230             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1231         }
1232     }
1233
1234     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1235     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1236     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1237
1238     /* release non reference frames */
1239     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1240         if (!s->picture[i].reference)
1241             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1242     }
1243
1244     if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) {
1245         // we already have an unused image
1246         // (maybe it was set before reading the header)
1247         pic = s->current_picture_ptr;
1248     } else {
1249         i   = ff_find_unused_picture(s->avctx, s->picture, 0);
1250         if (i < 0) {
1251             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1252             return i;
1253         }
1254         pic = &s->picture[i];
1255     }
1256
1257     pic->reference = 0;
1258     if (!s->droppable) {
1259         if (s->pict_type != AV_PICTURE_TYPE_B)
1260             pic->reference = 3;
1261     }
1262
1263     pic->f->coded_picture_number = s->coded_picture_number++;
1264
1265     if (alloc_picture(s, pic) < 0)
1266         return -1;
1267
1268     s->current_picture_ptr = pic;
1269     // FIXME use only the vars from current_pic
1270     s->current_picture_ptr->f->top_field_first = s->top_field_first;
1271     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
1272         s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1273         if (s->picture_structure != PICT_FRAME)
1274             s->current_picture_ptr->f->top_field_first =
1275                 (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
1276     }
1277     s->current_picture_ptr->f->interlaced_frame = !s->progressive_frame &&
1278                                                  !s->progressive_sequence;
1279     s->current_picture_ptr->field_picture      =  s->picture_structure != PICT_FRAME;
1280
1281     s->current_picture_ptr->f->pict_type = s->pict_type;
1282     // if (s->avctx->flags && AV_CODEC_FLAG_QSCALE)
1283     //     s->current_picture_ptr->quality = s->new_picture_ptr->quality;
1284     s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1285
1286     if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture,
1287                                    s->current_picture_ptr)) < 0)
1288         return ret;
1289
1290     if (s->pict_type != AV_PICTURE_TYPE_B) {
1291         s->last_picture_ptr = s->next_picture_ptr;
1292         if (!s->droppable)
1293             s->next_picture_ptr = s->current_picture_ptr;
1294     }
1295     ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1296             s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr,
1297             s->last_picture_ptr    ? s->last_picture_ptr->f->data[0]    : NULL,
1298             s->next_picture_ptr    ? s->next_picture_ptr->f->data[0]    : NULL,
1299             s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL,
1300             s->pict_type, s->droppable);
1301
1302     if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
1303         (s->pict_type != AV_PICTURE_TYPE_I)) {
1304         int h_chroma_shift, v_chroma_shift;
1305         av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
1306                                          &h_chroma_shift, &v_chroma_shift);
1307         if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0])
1308             av_log(avctx, AV_LOG_DEBUG,
1309                    "allocating dummy last picture for B frame\n");
1310         else if (s->pict_type != AV_PICTURE_TYPE_I)
1311             av_log(avctx, AV_LOG_ERROR,
1312                    "warning: first frame is no keyframe\n");
1313
1314         /* Allocate a dummy frame */
1315         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1316         if (i < 0) {
1317             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1318             return i;
1319         }
1320         s->last_picture_ptr = &s->picture[i];
1321
1322         s->last_picture_ptr->reference   = 3;
1323         s->last_picture_ptr->f->key_frame = 0;
1324         s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1325
1326         if (alloc_picture(s, s->last_picture_ptr) < 0) {
1327             s->last_picture_ptr = NULL;
1328             return -1;
1329         }
1330
1331         if (!avctx->hwaccel) {
1332             for(i=0; i<avctx->height; i++)
1333                 memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i,
1334                        0x80, avctx->width);
1335             if (s->last_picture_ptr->f->data[2]) {
1336                 for(i=0; i<AV_CEIL_RSHIFT(avctx->height, v_chroma_shift); i++) {
1337                     memset(s->last_picture_ptr->f->data[1] + s->last_picture_ptr->f->linesize[1]*i,
1338                         0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1339                     memset(s->last_picture_ptr->f->data[2] + s->last_picture_ptr->f->linesize[2]*i,
1340                         0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
1341                 }
1342             }
1343
1344             if(s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263){
1345                 for(i=0; i<avctx->height; i++)
1346                 memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i, 16, avctx->width);
1347             }
1348         }
1349
1350         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
1351         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
1352     }
1353     if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) &&
1354         s->pict_type == AV_PICTURE_TYPE_B) {
1355         /* Allocate a dummy frame */
1356         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1357         if (i < 0) {
1358             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1359             return i;
1360         }
1361         s->next_picture_ptr = &s->picture[i];
1362
1363         s->next_picture_ptr->reference   = 3;
1364         s->next_picture_ptr->f->key_frame = 0;
1365         s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
1366
1367         if (alloc_picture(s, s->next_picture_ptr) < 0) {
1368             s->next_picture_ptr = NULL;
1369             return -1;
1370         }
1371         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
1372         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
1373     }
1374
1375 #if 0 // BUFREF-FIXME
1376     memset(s->last_picture.f->data, 0, sizeof(s->last_picture.f->data));
1377     memset(s->next_picture.f->data, 0, sizeof(s->next_picture.f->data));
1378 #endif
1379     if (s->last_picture_ptr) {
1380         if (s->last_picture_ptr->f->buf[0] &&
1381             (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture,
1382                                        s->last_picture_ptr)) < 0)
1383             return ret;
1384     }
1385     if (s->next_picture_ptr) {
1386         if (s->next_picture_ptr->f->buf[0] &&
1387             (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture,
1388                                        s->next_picture_ptr)) < 0)
1389             return ret;
1390     }
1391
1392     av_assert0(s->pict_type == AV_PICTURE_TYPE_I || (s->last_picture_ptr &&
1393                                                  s->last_picture_ptr->f->buf[0]));
1394
1395     if (s->picture_structure!= PICT_FRAME) {
1396         int i;
1397         for (i = 0; i < 4; i++) {
1398             if (s->picture_structure == PICT_BOTTOM_FIELD) {
1399                 s->current_picture.f->data[i] +=
1400                     s->current_picture.f->linesize[i];
1401             }
1402             s->current_picture.f->linesize[i] *= 2;
1403             s->last_picture.f->linesize[i]    *= 2;
1404             s->next_picture.f->linesize[i]    *= 2;
1405         }
1406     }
1407
1408     /* set dequantizer, we can't do it during init as
1409      * it might change for MPEG-4 and we can't do it in the header
1410      * decode as init is not called for MPEG-4 there yet */
1411     if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1412         s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
1413         s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
1414     } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
1415         s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
1416         s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
1417     } else {
1418         s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
1419         s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
1420     }
1421
1422     if (s->avctx->debug & FF_DEBUG_NOMC) {
1423         gray_frame(s->current_picture_ptr->f);
1424     }
1425
1426     return 0;
1427 }
1428
1429 /* called after a frame has been decoded. */
1430 void ff_mpv_frame_end(MpegEncContext *s)
1431 {
1432     emms_c();
1433
1434     if (s->current_picture.reference)
1435         ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1436 }
1437
1438 void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
1439 {
1440     ff_print_debug_info2(s->avctx, pict, s->mbskip_table, p->mb_type,
1441                          p->qscale_table, p->motion_val, &s->low_delay,
1442                          s->mb_width, s->mb_height, s->mb_stride, s->quarter_sample);
1443 }
1444
1445 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
1446 {
1447     AVBufferRef *ref = av_buffer_ref(p->qscale_table_buf);
1448     int offset = 2*s->mb_stride + 1;
1449     if(!ref)
1450         return AVERROR(ENOMEM);
1451     av_assert0(ref->size >= offset + s->mb_stride * ((f->height+15)/16));
1452     ref->size -= offset;
1453     ref->data += offset;
1454     return av_frame_set_qp_table(f, ref, s->mb_stride, qp_type);
1455 }
1456
1457 static inline int hpel_motion_lowres(MpegEncContext *s,
1458                                      uint8_t *dest, uint8_t *src,
1459                                      int field_based, int field_select,
1460                                      int src_x, int src_y,
1461                                      int width, int height, ptrdiff_t stride,
1462                                      int h_edge_pos, int v_edge_pos,
1463                                      int w, int h, h264_chroma_mc_func *pix_op,
1464                                      int motion_x, int motion_y)
1465 {
1466     const int lowres   = s->avctx->lowres;
1467     const int op_index = FFMIN(lowres, 3);
1468     const int s_mask   = (2 << lowres) - 1;
1469     int emu = 0;
1470     int sx, sy;
1471
1472     if (s->quarter_sample) {
1473         motion_x /= 2;
1474         motion_y /= 2;
1475     }
1476
1477     sx = motion_x & s_mask;
1478     sy = motion_y & s_mask;
1479     src_x += motion_x >> lowres + 1;
1480     src_y += motion_y >> lowres + 1;
1481
1482     src   += src_y * stride + src_x;
1483
1484     if ((unsigned)src_x > FFMAX( h_edge_pos - (!!sx) - w,                 0) ||
1485         (unsigned)src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
1486         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
1487                                  s->linesize, s->linesize,
1488                                  w + 1, (h + 1) << field_based,
1489                                  src_x, src_y   << field_based,
1490                                  h_edge_pos, v_edge_pos);
1491         src = s->sc.edge_emu_buffer;
1492         emu = 1;
1493     }
1494
1495     sx = (sx << 2) >> lowres;
1496     sy = (sy << 2) >> lowres;
1497     if (field_select)
1498         src += s->linesize;
1499     pix_op[op_index](dest, src, stride, h, sx, sy);
1500     return emu;
1501 }
1502
1503 /* apply one mpeg motion vector to the three components */
1504 static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
1505                                                 uint8_t *dest_y,
1506                                                 uint8_t *dest_cb,
1507                                                 uint8_t *dest_cr,
1508                                                 int field_based,
1509                                                 int bottom_field,
1510                                                 int field_select,
1511                                                 uint8_t **ref_picture,
1512                                                 h264_chroma_mc_func *pix_op,
1513                                                 int motion_x, int motion_y,
1514                                                 int h, int mb_y)
1515 {
1516     uint8_t *ptr_y, *ptr_cb, *ptr_cr;
1517     int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy;
1518     ptrdiff_t uvlinesize, linesize;
1519     const int lowres     = s->avctx->lowres;
1520     const int op_index   = FFMIN(lowres-1+s->chroma_x_shift, 3);
1521     const int block_s    = 8>>lowres;
1522     const int s_mask     = (2 << lowres) - 1;
1523     const int h_edge_pos = s->h_edge_pos >> lowres;
1524     const int v_edge_pos = s->v_edge_pos >> lowres;
1525     linesize   = s->current_picture.f->linesize[0] << field_based;
1526     uvlinesize = s->current_picture.f->linesize[1] << field_based;
1527
1528     // FIXME obviously not perfect but qpel will not work in lowres anyway
1529     if (s->quarter_sample) {
1530         motion_x /= 2;
1531         motion_y /= 2;
1532     }
1533
1534     if(field_based){
1535         motion_y += (bottom_field - field_select)*((1 << lowres)-1);
1536     }
1537
1538     sx = motion_x & s_mask;
1539     sy = motion_y & s_mask;
1540     src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1);
1541     src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1);
1542
1543     if (s->out_format == FMT_H263) {
1544         uvsx    = ((motion_x >> 1) & s_mask) | (sx & 1);
1545         uvsy    = ((motion_y >> 1) & s_mask) | (sy & 1);
1546         uvsrc_x = src_x >> 1;
1547         uvsrc_y = src_y >> 1;
1548     } else if (s->out_format == FMT_H261) {
1549         // even chroma mv's are full pel in H261
1550         mx      = motion_x / 4;
1551         my      = motion_y / 4;
1552         uvsx    = (2 * mx) & s_mask;
1553         uvsy    = (2 * my) & s_mask;
1554         uvsrc_x = s->mb_x * block_s + (mx >> lowres);
1555         uvsrc_y =    mb_y * block_s + (my >> lowres);
1556     } else {
1557         if(s->chroma_y_shift){
1558             mx      = motion_x / 2;
1559             my      = motion_y / 2;
1560             uvsx    = mx & s_mask;
1561             uvsy    = my & s_mask;
1562             uvsrc_x = s->mb_x * block_s                 + (mx >> lowres + 1);
1563             uvsrc_y =   (mb_y * block_s >> field_based) + (my >> lowres + 1);
1564         } else {
1565             if(s->chroma_x_shift){
1566             //Chroma422
1567                 mx = motion_x / 2;
1568                 uvsx = mx & s_mask;
1569                 uvsy = motion_y & s_mask;
1570                 uvsrc_y = src_y;
1571                 uvsrc_x = s->mb_x*block_s               + (mx >> (lowres+1));
1572             } else {
1573             //Chroma444
1574                 uvsx = motion_x & s_mask;
1575                 uvsy = motion_y & s_mask;
1576                 uvsrc_x = src_x;
1577                 uvsrc_y = src_y;
1578             }
1579         }
1580     }
1581
1582     ptr_y  = ref_picture[0] + src_y   * linesize   + src_x;
1583     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
1584     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
1585
1586     if ((unsigned) src_x > FFMAX( h_edge_pos - (!!sx) - 2 * block_s,       0) || uvsrc_y<0 ||
1587         (unsigned) src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
1588         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
1589                                  linesize >> field_based, linesize >> field_based,
1590                                  17, 17 + field_based,
1591                                 src_x, src_y << field_based, h_edge_pos,
1592                                 v_edge_pos);
1593         ptr_y = s->sc.edge_emu_buffer;
1594         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1595             uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
1596             uint8_t *vbuf =ubuf + 10 * s->uvlinesize;
1597             if (s->workaround_bugs & FF_BUG_IEDGE)
1598                 vbuf -= s->uvlinesize;
1599             s->vdsp.emulated_edge_mc(ubuf,  ptr_cb,
1600                                      uvlinesize >> field_based, uvlinesize >> field_based,
1601                                      9, 9 + field_based,
1602                                     uvsrc_x, uvsrc_y << field_based,
1603                                     h_edge_pos >> 1, v_edge_pos >> 1);
1604             s->vdsp.emulated_edge_mc(vbuf,  ptr_cr,
1605                                      uvlinesize >> field_based,uvlinesize >> field_based,
1606                                      9, 9 + field_based,
1607                                     uvsrc_x, uvsrc_y << field_based,
1608                                     h_edge_pos >> 1, v_edge_pos >> 1);
1609             ptr_cb = ubuf;
1610             ptr_cr = vbuf;
1611         }
1612     }
1613
1614     // FIXME use this for field pix too instead of the obnoxious hack which changes picture.f->data
1615     if (bottom_field) {
1616         dest_y  += s->linesize;
1617         dest_cb += s->uvlinesize;
1618         dest_cr += s->uvlinesize;
1619     }
1620
1621     if (field_select) {
1622         ptr_y   += s->linesize;
1623         ptr_cb  += s->uvlinesize;
1624         ptr_cr  += s->uvlinesize;
1625     }
1626
1627     sx = (sx << 2) >> lowres;
1628     sy = (sy << 2) >> lowres;
1629     pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy);
1630
1631     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1632         int hc = s->chroma_y_shift ? (h+1-bottom_field)>>1 : h;
1633         uvsx = (uvsx << 2) >> lowres;
1634         uvsy = (uvsy << 2) >> lowres;
1635         if (hc) {
1636             pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy);
1637             pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy);
1638         }
1639     }
1640     // FIXME h261 lowres loop filter
1641 }
1642
1643 static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
1644                                             uint8_t *dest_cb, uint8_t *dest_cr,
1645                                             uint8_t **ref_picture,
1646                                             h264_chroma_mc_func * pix_op,
1647                                             int mx, int my)
1648 {
1649     const int lowres     = s->avctx->lowres;
1650     const int op_index   = FFMIN(lowres, 3);
1651     const int block_s    = 8 >> lowres;
1652     const int s_mask     = (2 << lowres) - 1;
1653     const int h_edge_pos = s->h_edge_pos >> lowres + 1;
1654     const int v_edge_pos = s->v_edge_pos >> lowres + 1;
1655     int emu = 0, src_x, src_y, sx, sy;
1656     ptrdiff_t offset;
1657     uint8_t *ptr;
1658
1659     if (s->quarter_sample) {
1660         mx /= 2;
1661         my /= 2;
1662     }
1663
1664     /* In case of 8X8, we construct a single chroma motion vector
1665        with a special rounding */
1666     mx = ff_h263_round_chroma(mx);
1667     my = ff_h263_round_chroma(my);
1668
1669     sx = mx & s_mask;
1670     sy = my & s_mask;
1671     src_x = s->mb_x * block_s + (mx >> lowres + 1);
1672     src_y = s->mb_y * block_s + (my >> lowres + 1);
1673
1674     offset = src_y * s->uvlinesize + src_x;
1675     ptr = ref_picture[1] + offset;
1676     if ((unsigned) src_x > FFMAX(h_edge_pos - (!!sx) - block_s, 0) ||
1677         (unsigned) src_y > FFMAX(v_edge_pos - (!!sy) - block_s, 0)) {
1678         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
1679                                  s->uvlinesize, s->uvlinesize,
1680                                  9, 9,
1681                                  src_x, src_y, h_edge_pos, v_edge_pos);
1682         ptr = s->sc.edge_emu_buffer;
1683         emu = 1;
1684     }
1685     sx = (sx << 2) >> lowres;
1686     sy = (sy << 2) >> lowres;
1687     pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
1688
1689     ptr = ref_picture[2] + offset;
1690     if (emu) {
1691         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
1692                                  s->uvlinesize, s->uvlinesize,
1693                                  9, 9,
1694                                  src_x, src_y, h_edge_pos, v_edge_pos);
1695         ptr = s->sc.edge_emu_buffer;
1696     }
1697     pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
1698 }
1699
1700 /**
1701  * motion compensation of a single macroblock
1702  * @param s context
1703  * @param dest_y luma destination pointer
1704  * @param dest_cb chroma cb/u destination pointer
1705  * @param dest_cr chroma cr/v destination pointer
1706  * @param dir direction (0->forward, 1->backward)
1707  * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
1708  * @param pix_op halfpel motion compensation function (average or put normally)
1709  * the motion vectors are taken from s->mv and the MV type from s->mv_type
1710  */
1711 static inline void MPV_motion_lowres(MpegEncContext *s,
1712                                      uint8_t *dest_y, uint8_t *dest_cb,
1713                                      uint8_t *dest_cr,
1714                                      int dir, uint8_t **ref_picture,
1715                                      h264_chroma_mc_func *pix_op)
1716 {
1717     int mx, my;
1718     int mb_x, mb_y, i;
1719     const int lowres  = s->avctx->lowres;
1720     const int block_s = 8 >>lowres;
1721
1722     mb_x = s->mb_x;
1723     mb_y = s->mb_y;
1724
1725     switch (s->mv_type) {
1726     case MV_TYPE_16X16:
1727         mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1728                            0, 0, 0,
1729                            ref_picture, pix_op,
1730                            s->mv[dir][0][0], s->mv[dir][0][1],
1731                            2 * block_s, mb_y);
1732         break;
1733     case MV_TYPE_8X8:
1734         mx = 0;
1735         my = 0;
1736         for (i = 0; i < 4; i++) {
1737             hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) *
1738                                s->linesize) * block_s,
1739                                ref_picture[0], 0, 0,
1740                                (2 * mb_x + (i & 1)) * block_s,
1741                                (2 * mb_y + (i >> 1)) * block_s,
1742                                s->width, s->height, s->linesize,
1743                                s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
1744                                block_s, block_s, pix_op,
1745                                s->mv[dir][i][0], s->mv[dir][i][1]);
1746
1747             mx += s->mv[dir][i][0];
1748             my += s->mv[dir][i][1];
1749         }
1750
1751         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
1752             chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture,
1753                                      pix_op, mx, my);
1754         break;
1755     case MV_TYPE_FIELD:
1756         if (s->picture_structure == PICT_FRAME) {
1757             /* top field */
1758             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1759                                1, 0, s->field_select[dir][0],
1760                                ref_picture, pix_op,
1761                                s->mv[dir][0][0], s->mv[dir][0][1],
1762                                block_s, mb_y);
1763             /* bottom field */
1764             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1765                                1, 1, s->field_select[dir][1],
1766                                ref_picture, pix_op,
1767                                s->mv[dir][1][0], s->mv[dir][1][1],
1768                                block_s, mb_y);
1769         } else {
1770             if (s->picture_structure != s->field_select[dir][0] + 1 &&
1771                 s->pict_type != AV_PICTURE_TYPE_B && !s->first_field) {
1772                 ref_picture = s->current_picture_ptr->f->data;
1773
1774             }
1775             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1776                                0, 0, s->field_select[dir][0],
1777                                ref_picture, pix_op,
1778                                s->mv[dir][0][0],
1779                                s->mv[dir][0][1], 2 * block_s, mb_y >> 1);
1780             }
1781         break;
1782     case MV_TYPE_16X8:
1783         for (i = 0; i < 2; i++) {
1784             uint8_t **ref2picture;
1785
1786             if (s->picture_structure == s->field_select[dir][i] + 1 ||
1787                 s->pict_type == AV_PICTURE_TYPE_B || s->first_field) {
1788                 ref2picture = ref_picture;
1789             } else {
1790                 ref2picture = s->current_picture_ptr->f->data;
1791             }
1792
1793             mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1794                                0, 0, s->field_select[dir][i],
1795                                ref2picture, pix_op,
1796                                s->mv[dir][i][0], s->mv[dir][i][1] +
1797                                2 * block_s * i, block_s, mb_y >> 1);
1798
1799             dest_y  +=  2 * block_s *  s->linesize;
1800             dest_cb += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
1801             dest_cr += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
1802         }
1803         break;
1804     case MV_TYPE_DMV:
1805         if (s->picture_structure == PICT_FRAME) {
1806             for (i = 0; i < 2; i++) {
1807                 int j;
1808                 for (j = 0; j < 2; j++) {
1809                     mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1810                                        1, j, j ^ i,
1811                                        ref_picture, pix_op,
1812                                        s->mv[dir][2 * i + j][0],
1813                                        s->mv[dir][2 * i + j][1],
1814                                        block_s, mb_y);
1815                 }
1816                 pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
1817             }
1818         } else {
1819             for (i = 0; i < 2; i++) {
1820                 mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1821                                    0, 0, s->picture_structure != i + 1,
1822                                    ref_picture, pix_op,
1823                                    s->mv[dir][2 * i][0],s->mv[dir][2 * i][1],
1824                                    2 * block_s, mb_y >> 1);
1825
1826                 // after put we make avg of the same block
1827                 pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
1828
1829                 // opposite parity is always in the same
1830                 // frame if this is second field
1831                 if (!s->first_field) {
1832                     ref_picture = s->current_picture_ptr->f->data;
1833                 }
1834             }
1835         }
1836         break;
1837     default:
1838         av_assert2(0);
1839     }
1840 }
1841
1842 /**
1843  * find the lowest MB row referenced in the MVs
1844  */
1845 static int lowest_referenced_row(MpegEncContext *s, int dir)
1846 {
1847     int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
1848     int my, off, i, mvs;
1849
1850     if (s->picture_structure != PICT_FRAME || s->mcsel)
1851         goto unhandled;
1852
1853     switch (s->mv_type) {
1854         case MV_TYPE_16X16:
1855             mvs = 1;
1856             break;
1857         case MV_TYPE_16X8:
1858             mvs = 2;
1859             break;
1860         case MV_TYPE_8X8:
1861             mvs = 4;
1862             break;
1863         default:
1864             goto unhandled;
1865     }
1866
1867     for (i = 0; i < mvs; i++) {
1868         my = s->mv[dir][i][1];
1869         my_max = FFMAX(my_max, my);
1870         my_min = FFMIN(my_min, my);
1871     }
1872
1873     off = ((FFMAX(-my_min, my_max)<<qpel_shift) + 63) >> 6;
1874
1875     return av_clip(s->mb_y + off, 0, s->mb_height - 1);
1876 unhandled:
1877     return s->mb_height-1;
1878 }
1879
1880 /* put block[] to dest[] */
1881 static inline void put_dct(MpegEncContext *s,
1882                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1883 {
1884     s->dct_unquantize_intra(s, block, i, qscale);
1885     s->idsp.idct_put(dest, line_size, block);
1886 }
1887
1888 /* add block[] to dest[] */
1889 static inline void add_dct(MpegEncContext *s,
1890                            int16_t *block, int i, uint8_t *dest, int line_size)
1891 {
1892     if (s->block_last_index[i] >= 0) {
1893         s->idsp.idct_add(dest, line_size, block);
1894     }
1895 }
1896
1897 static inline void add_dequant_dct(MpegEncContext *s,
1898                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1899 {
1900     if (s->block_last_index[i] >= 0) {
1901         s->dct_unquantize_inter(s, block, i, qscale);
1902
1903         s->idsp.idct_add(dest, line_size, block);
1904     }
1905 }
1906
1907 /**
1908  * Clean dc, ac, coded_block for the current non-intra MB.
1909  */
1910 void ff_clean_intra_table_entries(MpegEncContext *s)
1911 {
1912     int wrap = s->b8_stride;
1913     int xy = s->block_index[0];
1914
1915     s->dc_val[0][xy           ] =
1916     s->dc_val[0][xy + 1       ] =
1917     s->dc_val[0][xy     + wrap] =
1918     s->dc_val[0][xy + 1 + wrap] = 1024;
1919     /* ac pred */
1920     memset(s->ac_val[0][xy       ], 0, 32 * sizeof(int16_t));
1921     memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
1922     if (s->msmpeg4_version>=3) {
1923         s->coded_block[xy           ] =
1924         s->coded_block[xy + 1       ] =
1925         s->coded_block[xy     + wrap] =
1926         s->coded_block[xy + 1 + wrap] = 0;
1927     }
1928     /* chroma */
1929     wrap = s->mb_stride;
1930     xy = s->mb_x + s->mb_y * wrap;
1931     s->dc_val[1][xy] =
1932     s->dc_val[2][xy] = 1024;
1933     /* ac pred */
1934     memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
1935     memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
1936
1937     s->mbintra_table[xy]= 0;
1938 }
1939
1940 /* generic function called after a macroblock has been parsed by the
1941    decoder or after it has been encoded by the encoder.
1942
1943    Important variables used:
1944    s->mb_intra : true if intra macroblock
1945    s->mv_dir   : motion vector direction
1946    s->mv_type  : motion vector type
1947    s->mv       : motion vector
1948    s->interlaced_dct : true if interlaced dct used (mpeg2)
1949  */
1950 static av_always_inline
1951 void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
1952                             int lowres_flag, int is_mpeg12)
1953 {
1954     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
1955
1956     if (CONFIG_XVMC &&
1957         s->avctx->hwaccel && s->avctx->hwaccel->decode_mb) {
1958         s->avctx->hwaccel->decode_mb(s);//xvmc uses pblocks
1959         return;
1960     }
1961
1962     if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
1963        /* print DCT coefficients */
1964        int i,j;
1965        av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
1966        for(i=0; i<6; i++){
1967            for(j=0; j<64; j++){
1968                av_log(s->avctx, AV_LOG_DEBUG, "%5d",
1969                       block[i][s->idsp.idct_permutation[j]]);
1970            }
1971            av_log(s->avctx, AV_LOG_DEBUG, "\n");
1972        }
1973     }
1974
1975     s->current_picture.qscale_table[mb_xy] = s->qscale;
1976
1977     /* update DC predictors for P macroblocks */
1978     if (!s->mb_intra) {
1979         if (!is_mpeg12 && (s->h263_pred || s->h263_aic)) {
1980             if(s->mbintra_table[mb_xy])
1981                 ff_clean_intra_table_entries(s);
1982         } else {
1983             s->last_dc[0] =
1984             s->last_dc[1] =
1985             s->last_dc[2] = 128 << s->intra_dc_precision;
1986         }
1987     }
1988     else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
1989         s->mbintra_table[mb_xy]=1;
1990
1991     if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) || s->frame_skip_threshold || s->frame_skip_factor ||
1992         !(s->encoding && (s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
1993           s->avctx->mb_decision != FF_MB_DECISION_RD)) { // FIXME precalc
1994         uint8_t *dest_y, *dest_cb, *dest_cr;
1995         int dct_linesize, dct_offset;
1996         op_pixels_func (*op_pix)[4];
1997         qpel_mc_func (*op_qpix)[16];
1998         const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
1999         const int uvlinesize = s->current_picture.f->linesize[1];
2000         const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band || lowres_flag;
2001         const int block_size= lowres_flag ? 8>>s->avctx->lowres : 8;
2002
2003         /* avoid copy if macroblock skipped in last frame too */
2004         /* skip only during decoding as we might trash the buffers during encoding a bit */
2005         if(!s->encoding){
2006             uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
2007
2008             if (s->mb_skipped) {
2009                 s->mb_skipped= 0;
2010                 av_assert2(s->pict_type!=AV_PICTURE_TYPE_I);
2011                 *mbskip_ptr = 1;
2012             } else if(!s->current_picture.reference) {
2013                 *mbskip_ptr = 1;
2014             } else{
2015                 *mbskip_ptr = 0; /* not skipped */
2016             }
2017         }
2018
2019         dct_linesize = linesize << s->interlaced_dct;
2020         dct_offset   = s->interlaced_dct ? linesize : linesize * block_size;
2021
2022         if(readable){
2023             dest_y=  s->dest[0];
2024             dest_cb= s->dest[1];
2025             dest_cr= s->dest[2];
2026         }else{
2027             dest_y = s->sc.b_scratchpad;
2028             dest_cb= s->sc.b_scratchpad+16*linesize;
2029             dest_cr= s->sc.b_scratchpad+32*linesize;
2030         }
2031
2032         if (!s->mb_intra) {
2033             /* motion handling */
2034             /* decoding or more than one mb_type (MC was already done otherwise) */
2035             if(!s->encoding){
2036
2037                 if(HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
2038                     if (s->mv_dir & MV_DIR_FORWARD) {
2039                         ff_thread_await_progress(&s->last_picture_ptr->tf,
2040                                                  lowest_referenced_row(s, 0),
2041                                                  0);
2042                     }
2043                     if (s->mv_dir & MV_DIR_BACKWARD) {
2044                         ff_thread_await_progress(&s->next_picture_ptr->tf,
2045                                                  lowest_referenced_row(s, 1),
2046                                                  0);
2047                     }
2048                 }
2049
2050                 if(lowres_flag){
2051                     h264_chroma_mc_func *op_pix = s->h264chroma.put_h264_chroma_pixels_tab;
2052
2053                     if (s->mv_dir & MV_DIR_FORWARD) {
2054                         MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix);
2055                         op_pix = s->h264chroma.avg_h264_chroma_pixels_tab;
2056                     }
2057                     if (s->mv_dir & MV_DIR_BACKWARD) {
2058                         MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix);
2059                     }
2060                 }else{
2061                     op_qpix = s->me.qpel_put;
2062                     if ((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
2063                         op_pix = s->hdsp.put_pixels_tab;
2064                     }else{
2065                         op_pix = s->hdsp.put_no_rnd_pixels_tab;
2066                     }
2067                     if (s->mv_dir & MV_DIR_FORWARD) {
2068                         ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix, op_qpix);
2069                         op_pix = s->hdsp.avg_pixels_tab;
2070                         op_qpix= s->me.qpel_avg;
2071                     }
2072                     if (s->mv_dir & MV_DIR_BACKWARD) {
2073                         ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix, op_qpix);
2074                     }
2075                 }
2076             }
2077
2078             /* skip dequant / idct if we are really late ;) */
2079             if(s->avctx->skip_idct){
2080                 if(  (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
2081                    ||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
2082                    || s->avctx->skip_idct >= AVDISCARD_ALL)
2083                     goto skip_idct;
2084             }
2085
2086             /* add dct residue */
2087             if(s->encoding || !(   s->msmpeg4_version || s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO
2088                                 || (s->codec_id==AV_CODEC_ID_MPEG4 && !s->mpeg_quant))){
2089                 add_dequant_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
2090                 add_dequant_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
2091                 add_dequant_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
2092                 add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2093
2094                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2095                     if (s->chroma_y_shift){
2096                         add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2097                         add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2098                     }else{
2099                         dct_linesize >>= 1;
2100                         dct_offset >>=1;
2101                         add_dequant_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
2102                         add_dequant_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
2103                         add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2104                         add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2105                     }
2106                 }
2107             } else if(is_mpeg12 || (s->codec_id != AV_CODEC_ID_WMV2)){
2108                 add_dct(s, block[0], 0, dest_y                          , dct_linesize);
2109                 add_dct(s, block[1], 1, dest_y              + block_size, dct_linesize);
2110                 add_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize);
2111                 add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
2112
2113                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2114                     if(s->chroma_y_shift){//Chroma420
2115                         add_dct(s, block[4], 4, dest_cb, uvlinesize);
2116                         add_dct(s, block[5], 5, dest_cr, uvlinesize);
2117                     }else{
2118                         //chroma422
2119                         dct_linesize = uvlinesize << s->interlaced_dct;
2120                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2121
2122                         add_dct(s, block[4], 4, dest_cb, dct_linesize);
2123                         add_dct(s, block[5], 5, dest_cr, dct_linesize);
2124                         add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
2125                         add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
2126                         if(!s->chroma_x_shift){//Chroma444
2127                             add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
2128                             add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
2129                             add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
2130                             add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
2131                         }
2132                     }
2133                 }//fi gray
2134             }
2135             else if (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) {
2136                 ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
2137             }
2138         } else {
2139             /* Only MPEG-4 Simple Studio Profile is supported in > 8-bit mode.
2140                TODO: Integrate 10-bit properly into mpegvideo.c so that ER works properly */
2141             if (s->avctx->bits_per_raw_sample > 8){
2142                 const int act_block_size = block_size * 2;
2143
2144                 if(s->dpcm_direction == 0) {
2145                     s->idsp.idct_put(dest_y,                           dct_linesize, (int16_t*)(*s->block32)[0]);
2146                     s->idsp.idct_put(dest_y              + act_block_size, dct_linesize, (int16_t*)(*s->block32)[1]);
2147                     s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, (int16_t*)(*s->block32)[2]);
2148                     s->idsp.idct_put(dest_y + dct_offset + act_block_size, dct_linesize, (int16_t*)(*s->block32)[3]);
2149
2150                     dct_linesize = uvlinesize << s->interlaced_dct;
2151                     dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2152
2153                     s->idsp.idct_put(dest_cb,              dct_linesize, (int16_t*)(*s->block32)[4]);
2154                     s->idsp.idct_put(dest_cr,              dct_linesize, (int16_t*)(*s->block32)[5]);
2155                     s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, (int16_t*)(*s->block32)[6]);
2156                     s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, (int16_t*)(*s->block32)[7]);
2157                     if(!s->chroma_x_shift){//Chroma444
2158                         s->idsp.idct_put(dest_cb + act_block_size,              dct_linesize, (int16_t*)(*s->block32)[8]);
2159                         s->idsp.idct_put(dest_cr + act_block_size,              dct_linesize, (int16_t*)(*s->block32)[9]);
2160                         s->idsp.idct_put(dest_cb + act_block_size + dct_offset, dct_linesize, (int16_t*)(*s->block32)[10]);
2161                         s->idsp.idct_put(dest_cr + act_block_size + dct_offset, dct_linesize, (int16_t*)(*s->block32)[11]);
2162                     }
2163                 } else if(s->dpcm_direction == 1) {
2164                     int i, w, h;
2165                     uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2166                     int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2167                     for(i = 0; i < 3; i++) {
2168                         int idx = 0;
2169                         int vsub = i ? s->chroma_y_shift : 0;
2170                         int hsub = i ? s->chroma_x_shift : 0;
2171                         for(h = 0; h < (16 >> vsub); h++){
2172                             for(w = 0; w < (16 >> hsub); w++)
2173                                 dest_pcm[i][w] = (*s->dpcm_macroblock)[i][idx++];
2174                             dest_pcm[i] += linesize[i] / 2;
2175                         }
2176                     }
2177                 } else if(s->dpcm_direction == -1) {
2178                     int i, w, h;
2179                     uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2180                     int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2181                     for(i = 0; i < 3; i++) {
2182                         int idx = 0;
2183                         int vsub = i ? s->chroma_y_shift : 0;
2184                         int hsub = i ? s->chroma_x_shift : 0;
2185                         dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub) - 1);
2186                         for(h = (16 >> vsub)-1; h >= 1; h--){
2187                             for(w = (16 >> hsub)-1; w >= 1; w--)
2188                                 dest_pcm[i][w] = (*s->dpcm_macroblock)[i][idx++];
2189                             dest_pcm[i] -= linesize[i] / 2;
2190                         }
2191                     }
2192                 }
2193             }
2194             /* dct only in intra block */
2195             else if(s->encoding || !(s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO)){
2196                 put_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
2197                 put_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
2198                 put_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
2199                 put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
2200
2201                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2202                     if(s->chroma_y_shift){
2203                         put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
2204                         put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
2205                     }else{
2206                         dct_offset >>=1;
2207                         dct_linesize >>=1;
2208                         put_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
2209                         put_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
2210                         put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
2211                         put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
2212                     }
2213                 }
2214             }else{
2215                 s->idsp.idct_put(dest_y,                           dct_linesize, block[0]);
2216                 s->idsp.idct_put(dest_y              + block_size, dct_linesize, block[1]);
2217                 s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, block[2]);
2218                 s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
2219
2220                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2221                     if(s->chroma_y_shift){
2222                         s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
2223                         s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
2224                     }else{
2225
2226                         dct_linesize = uvlinesize << s->interlaced_dct;
2227                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2228
2229                         s->idsp.idct_put(dest_cb,              dct_linesize, block[4]);
2230                         s->idsp.idct_put(dest_cr,              dct_linesize, block[5]);
2231                         s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
2232                         s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
2233                         if(!s->chroma_x_shift){//Chroma444
2234                             s->idsp.idct_put(dest_cb + block_size,              dct_linesize, block[8]);
2235                             s->idsp.idct_put(dest_cr + block_size,              dct_linesize, block[9]);
2236                             s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
2237                             s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
2238                         }
2239                     }
2240                 }//gray
2241             }
2242         }
2243 skip_idct:
2244         if(!readable){
2245             s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y ,   linesize,16);
2246             if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
2247                 s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
2248                 s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize,16 >> s->chroma_y_shift);
2249             }
2250         }
2251     }
2252 }
2253
2254 void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
2255 {
2256 #if !CONFIG_SMALL
2257     if(s->out_format == FMT_MPEG1) {
2258         if(s->avctx->lowres) mpv_reconstruct_mb_internal(s, block, 1, 1);
2259         else                 mpv_reconstruct_mb_internal(s, block, 0, 1);
2260     } else
2261 #endif
2262     if(s->avctx->lowres) mpv_reconstruct_mb_internal(s, block, 1, 0);
2263     else                  mpv_reconstruct_mb_internal(s, block, 0, 0);
2264 }
2265
2266 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
2267 {
2268     ff_draw_horiz_band(s->avctx, s->current_picture_ptr->f,
2269                        s->last_picture_ptr ? s->last_picture_ptr->f : NULL, y, h, s->picture_structure,
2270                        s->first_field, s->low_delay);
2271 }
2272
2273 void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
2274     const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
2275     const int uvlinesize = s->current_picture.f->linesize[1];
2276     const int width_of_mb = (4 + (s->avctx->bits_per_raw_sample > 8)) - s->avctx->lowres;
2277     const int height_of_mb = 4 - s->avctx->lowres;
2278
2279     s->block_index[0]= s->b8_stride*(s->mb_y*2    ) - 2 + s->mb_x*2;
2280     s->block_index[1]= s->b8_stride*(s->mb_y*2    ) - 1 + s->mb_x*2;
2281     s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
2282     s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
2283     s->block_index[4]= s->mb_stride*(s->mb_y + 1)                + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
2284     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;
2285     //block_index is not used by mpeg2, so it is not affected by chroma_format
2286
2287     s->dest[0] = s->current_picture.f->data[0] + (int)((s->mb_x - 1U) <<  width_of_mb);
2288     s->dest[1] = s->current_picture.f->data[1] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
2289     s->dest[2] = s->current_picture.f->data[2] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
2290
2291     if(!(s->pict_type==AV_PICTURE_TYPE_B && s->avctx->draw_horiz_band && s->picture_structure==PICT_FRAME))
2292     {
2293         if(s->picture_structure==PICT_FRAME){
2294         s->dest[0] += s->mb_y *   linesize << height_of_mb;
2295         s->dest[1] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
2296         s->dest[2] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
2297         }else{
2298             s->dest[0] += (s->mb_y>>1) *   linesize << height_of_mb;
2299             s->dest[1] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
2300             s->dest[2] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
2301             av_assert1((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
2302         }
2303     }
2304 }
2305
2306 void ff_mpeg_flush(AVCodecContext *avctx){
2307     int i;
2308     MpegEncContext *s = avctx->priv_data;
2309
2310     if (!s || !s->picture)
2311         return;
2312
2313     for (i = 0; i < MAX_PICTURE_COUNT; i++)
2314         ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
2315     s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
2316
2317     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
2318     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
2319     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
2320
2321     s->mb_x= s->mb_y= 0;
2322     s->closed_gop= 0;
2323
2324     s->parse_context.state= -1;
2325     s->parse_context.frame_start_found= 0;
2326     s->parse_context.overread= 0;
2327     s->parse_context.overread_index= 0;
2328     s->parse_context.index= 0;
2329     s->parse_context.last_index= 0;
2330     s->bitstream_buffer_size=0;
2331     s->pp_time=0;
2332 }
2333
2334 /**
2335  * set qscale and update qscale dependent variables.
2336  */
2337 void ff_set_qscale(MpegEncContext * s, int qscale)
2338 {
2339     if (qscale < 1)
2340         qscale = 1;
2341     else if (qscale > 31)
2342         qscale = 31;
2343
2344     s->qscale = qscale;
2345     s->chroma_qscale= s->chroma_qscale_table[qscale];
2346
2347     s->y_dc_scale= s->y_dc_scale_table[ qscale ];
2348     s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ];
2349 }
2350
2351 void ff_mpv_report_decode_progress(MpegEncContext *s)
2352 {
2353     if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred)
2354         ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0);
2355 }