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

   1 /*
   2  * The simplest mpeg encoder (well, it was the simplest!)
   3  * Copyright (c) 2000,2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
   7  *
   8  * This file is part of Libav.
   9  *
  10  * Libav is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * Libav is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with Libav; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  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/timer.h"
  35 #include "avcodec.h"
  36 #include "blockdsp.h"
  37 #include "idctdsp.h"
  38 #include "internal.h"
  39 #include "mathops.h"
  40 #include "mpeg_er.h"
  41 #include "mpegutils.h"
  42 #include "mpegvideo.h"
  43 #include "mpegvideodata.h"
  44 #include "mjpegenc.h"
  45 #include "msmpeg4.h"
  46 #include "qpeldsp.h"
  47 #include "xvmc_internal.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     if (n < 4)
  61         block[0] = block[0] * s->y_dc_scale;
  62     else
  63         block[0] = block[0] * s->c_dc_scale;
  64     /* XXX: only mpeg1 */
  65     quant_matrix = s->intra_matrix;
  66     for(i=1;i<=nCoeffs;i++) {
  67         int j= s->intra_scantable.permutated[i];
  68         level = block[j];
  69         if (level) {
  70             if (level < 0) {
  71                 level = -level;
  72                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
  73                 level = (level - 1) | 1;
  74                 level = -level;
  75             } else {
  76                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
  77                 level = (level - 1) | 1;
  78             }
  79             block[j] = level;
  80         }
  81     }
  82 }
  83
  84 static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
  85                                    int16_t *block, int n, int qscale)
  86 {
  87     int i, level, nCoeffs;
  88     const uint16_t *quant_matrix;
  89
  90     nCoeffs= s->block_last_index[n];
  91
  92     quant_matrix = s->inter_matrix;
  93     for(i=0; i<=nCoeffs; i++) {
  94         int j= s->intra_scantable.permutated[i];
  95         level = block[j];
  96         if (level) {
  97             if (level < 0) {
  98                 level = -level;
  99                 level = (((level << 1) + 1) * qscale *
 100                          ((int) (quant_matrix[j]))) >> 4;
 101                 level = (level - 1) | 1;
 102                 level = -level;
 103             } else {
 104                 level = (((level << 1) + 1) * qscale *
 105                          ((int) (quant_matrix[j]))) >> 4;
 106                 level = (level - 1) | 1;
 107             }
 108             block[j] = level;
 109         }
 110     }
 111 }
 112
 113 static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
 114                                    int16_t *block, int n, int qscale)
 115 {
 116     int i, level, nCoeffs;
 117     const uint16_t *quant_matrix;
 118
 119     if(s->alternate_scan) nCoeffs= 63;
 120     else nCoeffs= s->block_last_index[n];
 121
 122     if (n < 4)
 123         block[0] = block[0] * s->y_dc_scale;
 124     else
 125         block[0] = block[0] * s->c_dc_scale;
 126     quant_matrix = s->intra_matrix;
 127     for(i=1;i<=nCoeffs;i++) {
 128         int j= s->intra_scantable.permutated[i];
 129         level = block[j];
 130         if (level) {
 131             if (level < 0) {
 132                 level = -level;
 133                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
 134                 level = -level;
 135             } else {
 136                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
 137             }
 138             block[j] = level;
 139         }
 140     }
 141 }
 142
 143 static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
 144                                    int16_t *block, int n, int qscale)
 145 {
 146     int i, level, nCoeffs;
 147     const uint16_t *quant_matrix;
 148     int sum=-1;
 149
 150     if(s->alternate_scan) nCoeffs= 63;
 151     else nCoeffs= s->block_last_index[n];
 152
 153     if (n < 4)
 154         block[0] = block[0] * s->y_dc_scale;
 155     else
 156         block[0] = block[0] * s->c_dc_scale;
 157     quant_matrix = s->intra_matrix;
 158     for(i=1;i<=nCoeffs;i++) {
 159         int j= s->intra_scantable.permutated[i];
 160         level = block[j];
 161         if (level) {
 162             if (level < 0) {
 163                 level = -level;
 164                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
 165                 level = -level;
 166             } else {
 167                 level = (int)(level * qscale * quant_matrix[j]) >> 3;
 168             }
 169             block[j] = level;
 170             sum+=level;
 171         }
 172     }
 173     block[63]^=sum&1;
 174 }
 175
 176 static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
 177                                    int16_t *block, int n, int qscale)
 178 {
 179     int i, level, nCoeffs;
 180     const uint16_t *quant_matrix;
 181     int sum=-1;
 182
 183     if(s->alternate_scan) nCoeffs= 63;
 184     else nCoeffs= s->block_last_index[n];
 185
 186     quant_matrix = s->inter_matrix;
 187     for(i=0; i<=nCoeffs; i++) {
 188         int j= s->intra_scantable.permutated[i];
 189         level = block[j];
 190         if (level) {
 191             if (level < 0) {
 192                 level = -level;
 193                 level = (((level << 1) + 1) * qscale *
 194                          ((int) (quant_matrix[j]))) >> 4;
 195                 level = -level;
 196             } else {
 197                 level = (((level << 1) + 1) * qscale *
 198                          ((int) (quant_matrix[j]))) >> 4;
 199             }
 200             block[j] = level;
 201             sum+=level;
 202         }
 203     }
 204     block[63]^=sum&1;
 205 }
 206
 207 static void dct_unquantize_h263_intra_c(MpegEncContext *s,
 208                                   int16_t *block, int n, int qscale)
 209 {
 210     int i, level, qmul, qadd;
 211     int nCoeffs;
 212
 213     assert(s->block_last_index[n]>=0);
 214
 215     qmul = qscale << 1;
 216
 217     if (!s->h263_aic) {
 218         if (n < 4)
 219             block[0] = block[0] * s->y_dc_scale;
 220         else
 221             block[0] = block[0] * s->c_dc_scale;
 222         qadd = (qscale - 1) | 1;
 223     }else{
 224         qadd = 0;
 225     }
 226     if(s->ac_pred)
 227         nCoeffs=63;
 228     else
 229         nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
 230
 231     for(i=1; i<=nCoeffs; i++) {
 232         level = block[i];
 233         if (level) {
 234             if (level < 0) {
 235                 level = level * qmul - qadd;
 236             } else {
 237                 level = level * qmul + qadd;
 238             }
 239             block[i] = level;
 240         }
 241     }
 242 }
 243
 244 static void dct_unquantize_h263_inter_c(MpegEncContext *s,
 245                                   int16_t *block, int n, int qscale)
 246 {
 247     int i, level, qmul, qadd;
 248     int nCoeffs;
 249
 250     assert(s->block_last_index[n]>=0);
 251
 252     qadd = (qscale - 1) | 1;
 253     qmul = qscale << 1;
 254
 255     nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
 256
 257     for(i=0; i<=nCoeffs; i++) {
 258         level = block[i];
 259         if (level) {
 260             if (level < 0) {
 261                 level = level * qmul - qadd;
 262             } else {
 263                 level = level * qmul + qadd;
 264             }
 265             block[i] = level;
 266         }
 267     }
 268 }
 269
 270 /* init common dct for both encoder and decoder */
 271 static av_cold int dct_init(MpegEncContext *s)
 272 {
 273     ff_blockdsp_init(&s->bdsp, s->avctx);
 274     ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
 275     ff_mpegvideodsp_init(&s->mdsp);
 276     ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
 277
 278     s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_c;
 279     s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_c;
 280     s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_c;
 281     s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_c;
 282     s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_c;
 283     if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)
 284         s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
 285     s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
 286
 287     if (HAVE_INTRINSICS_NEON)
 288         ff_mpv_common_init_neon(s);
 289
 290     if (ARCH_ARM)
 291         ff_mpv_common_init_arm(s);
 292     if (ARCH_PPC)
 293         ff_mpv_common_init_ppc(s);
 294     if (ARCH_X86)
 295         ff_mpv_common_init_x86(s);
 296
 297     return 0;
 298 }
 299
 300 av_cold void ff_mpv_idct_init(MpegEncContext *s)
 301 {
 302     ff_idctdsp_init(&s->idsp, s->avctx);
 303
 304     /* load & permutate scantables
 305      * note: only wmv uses different ones
 306      */
 307     if (s->alternate_scan) {
 308         ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
 309         ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
 310     } else {
 311         ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
 312         ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
 313     }
 314     ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
 315     ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
 316 }
 317
 318 static int alloc_picture(MpegEncContext *s, Picture *pic, int shared)
 319 {
 320     return ff_alloc_picture(s->avctx, pic, &s->me, &s->sc, shared, 0,
 321                             s->chroma_x_shift, s->chroma_y_shift, s->out_format,
 322                             s->mb_stride, s->mb_height, s->b8_stride,
 323                             &s->linesize, &s->uvlinesize);
 324 }
 325
 326 static int init_duplicate_context(MpegEncContext *s)
 327 {
 328     int y_size = s->b8_stride * (2 * s->mb_height + 1);
 329     int c_size = s->mb_stride * (s->mb_height + 1);
 330     int yc_size = y_size + 2 * c_size;
 331     int i;
 332
 333     s->sc.edge_emu_buffer =
 334     s->me.scratchpad   =
 335     s->me.temp         =
 336     s->sc.rd_scratchpad   =
 337     s->sc.b_scratchpad    =
 338     s->sc.obmc_scratchpad = NULL;
 339
 340     if (s->encoding) {
 341         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.map,
 342                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 343         FF_ALLOCZ_OR_GOTO(s->avctx, s->me.score_map,
 344                           ME_MAP_SIZE * sizeof(uint32_t), fail)
 345         if (s->avctx->noise_reduction) {
 346             FF_ALLOCZ_OR_GOTO(s->avctx, s->dct_error_sum,
 347                               2 * 64 * sizeof(int), fail)
 348         }
 349     }
 350     FF_ALLOCZ_OR_GOTO(s->avctx, s->blocks, 64 * 12 * 2 * sizeof(int16_t), fail)
 351     s->block = s->blocks[0];
 352
 353     for (i = 0; i < 12; i++) {
 354         s->pblocks[i] = &s->block[i];
 355     }
 356     if (s->avctx->codec_tag == AV_RL32("VCR2")) {
 357         // exchange uv
 358         int16_t (*tmp)[64];
 359         tmp           = s->pblocks[4];
 360         s->pblocks[4] = s->pblocks[5];
 361         s->pblocks[5] = tmp;
 362     }
 363
 364     if (s->out_format == FMT_H263) {
 365         /* ac values */
 366         FF_ALLOCZ_OR_GOTO(s->avctx, s->ac_val_base,
 367                           yc_size * sizeof(int16_t) * 16, fail);
 368         s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
 369         s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
 370         s->ac_val[2] = s->ac_val[1] + c_size;
 371     }
 372
 373     return 0;
 374 fail:
 375     return -1; // free() through ff_mpv_common_end()
 376 }
 377
 378 static void free_duplicate_context(MpegEncContext *s)
 379 {
 380     if (!s)
 381         return;
 382
 383     av_freep(&s->sc.edge_emu_buffer);
 384     av_freep(&s->me.scratchpad);
 385     s->me.temp =
 386     s->sc.rd_scratchpad =
 387     s->sc.b_scratchpad =
 388     s->sc.obmc_scratchpad = NULL;
 389
 390     av_freep(&s->dct_error_sum);
 391     av_freep(&s->me.map);
 392     av_freep(&s->me.score_map);
 393     av_freep(&s->blocks);
 394     av_freep(&s->ac_val_base);
 395     s->block = NULL;
 396 }
 397
 398 static void backup_duplicate_context(MpegEncContext *bak, MpegEncContext *src)
 399 {
 400 #define COPY(a) bak->a = src->a
 401     COPY(sc.edge_emu_buffer);
 402     COPY(me.scratchpad);
 403     COPY(me.temp);
 404     COPY(sc.rd_scratchpad);
 405     COPY(sc.b_scratchpad);
 406     COPY(sc.obmc_scratchpad);
 407     COPY(me.map);
 408     COPY(me.score_map);
 409     COPY(blocks);
 410     COPY(block);
 411     COPY(start_mb_y);
 412     COPY(end_mb_y);
 413     COPY(me.map_generation);
 414     COPY(pb);
 415     COPY(dct_error_sum);
 416     COPY(dct_count[0]);
 417     COPY(dct_count[1]);
 418     COPY(ac_val_base);
 419     COPY(ac_val[0]);
 420     COPY(ac_val[1]);
 421     COPY(ac_val[2]);
 422 #undef COPY
 423 }
 424
 425 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src)
 426 {
 427     MpegEncContext bak;
 428     int i, ret;
 429     // FIXME copy only needed parts
 430     // START_TIMER
 431     backup_duplicate_context(&bak, dst);
 432     memcpy(dst, src, sizeof(MpegEncContext));
 433     backup_duplicate_context(dst, &bak);
 434     for (i = 0; i < 12; i++) {
 435         dst->pblocks[i] = &dst->block[i];
 436     }
 437     if (dst->avctx->codec_tag == AV_RL32("VCR2")) {
 438         // exchange uv
 439         int16_t (*tmp)[64];
 440         tmp             = dst->pblocks[4];
 441         dst->pblocks[4] = dst->pblocks[5];
 442         dst->pblocks[5] = tmp;
 443     }
 444     if (!dst->sc.edge_emu_buffer &&
 445         (ret = ff_mpeg_framesize_alloc(dst->avctx, &dst->me,
 446                                        &dst->sc, dst->linesize)) < 0) {
 447         av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
 448                "scratch buffers.\n");
 449         return ret;
 450     }
 451     // STOP_TIMER("update_duplicate_context")
 452     // about 10k cycles / 0.01 sec for  1000frames on 1ghz with 2 threads
 453     return 0;
 454 }
 455
 456 int ff_mpeg_update_thread_context(AVCodecContext *dst,
 457                                   const AVCodecContext *src)
 458 {
 459     int i, ret;
 460     MpegEncContext *s = dst->priv_data, *s1 = src->priv_data;
 461
 462     if (dst == src || !s1->context_initialized)
 463         return 0;
 464
 465     // FIXME can parameters change on I-frames?
 466     // in that case dst may need a reinit
 467     if (!s->context_initialized) {
 468         int err;
 469         memcpy(s, s1, sizeof(MpegEncContext));
 470
 471         s->avctx                 = dst;
 472         s->bitstream_buffer      = NULL;
 473         s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0;
 474
 475         ff_mpv_idct_init(s);
 476         if ((err = ff_mpv_common_init(s)) < 0)
 477             return err;
 478     }
 479
 480     if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
 481         int err;
 482         s->context_reinit = 0;
 483         s->height = s1->height;
 484         s->width  = s1->width;
 485         if ((err = ff_mpv_common_frame_size_change(s)) < 0)
 486             return err;
 487     }
 488
 489     s->avctx->coded_height  = s1->avctx->coded_height;
 490     s->avctx->coded_width   = s1->avctx->coded_width;
 491     s->avctx->width         = s1->avctx->width;
 492     s->avctx->height        = s1->avctx->height;
 493
 494     s->coded_picture_number = s1->coded_picture_number;
 495     s->picture_number       = s1->picture_number;
 496
 497     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 498         ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
 499         if (s1->picture[i].f->buf[0] &&
 500             (ret = ff_mpeg_ref_picture(s->avctx, &s->picture[i], &s1->picture[i])) < 0)
 501             return ret;
 502     }
 503
 504 #define UPDATE_PICTURE(pic)\
 505 do {\
 506     ff_mpeg_unref_picture(s->avctx, &s->pic);\
 507     if (s1->pic.f->buf[0])\
 508         ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
 509     else\
 510         ret = ff_update_picture_tables(&s->pic, &s1->pic);\
 511     if (ret < 0)\
 512         return ret;\
 513 } while (0)
 514
 515     UPDATE_PICTURE(current_picture);
 516     UPDATE_PICTURE(last_picture);
 517     UPDATE_PICTURE(next_picture);
 518
 519 #define REBASE_PICTURE(pic, new_ctx, old_ctx)                                 \
 520     ((pic && pic >= old_ctx->picture &&                                       \
 521       pic < old_ctx->picture + MAX_PICTURE_COUNT) ?                           \
 522         &new_ctx->picture[pic - old_ctx->picture] : NULL)
 523
 524     s->last_picture_ptr    = REBASE_PICTURE(s1->last_picture_ptr,    s, s1);
 525     s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1);
 526     s->next_picture_ptr    = REBASE_PICTURE(s1->next_picture_ptr,    s, s1);
 527
 528     // Error/bug resilience
 529     s->next_p_frame_damaged = s1->next_p_frame_damaged;
 530     s->workaround_bugs      = s1->workaround_bugs;
 531
 532     // MPEG4 timing info
 533     memcpy(&s->last_time_base, &s1->last_time_base,
 534            (char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
 535            (char *) &s1->last_time_base);
 536
 537     // B-frame info
 538     s->max_b_frames = s1->max_b_frames;
 539     s->low_delay    = s1->low_delay;
 540     s->droppable    = s1->droppable;
 541
 542     // DivX handling (doesn't work)
 543     s->divx_packed  = s1->divx_packed;
 544
 545     if (s1->bitstream_buffer) {
 546         if (s1->bitstream_buffer_size +
 547             AV_INPUT_BUFFER_PADDING_SIZE > s->allocated_bitstream_buffer_size)
 548             av_fast_malloc(&s->bitstream_buffer,
 549                            &s->allocated_bitstream_buffer_size,
 550                            s1->allocated_bitstream_buffer_size);
 551             s->bitstream_buffer_size = s1->bitstream_buffer_size;
 552         memcpy(s->bitstream_buffer, s1->bitstream_buffer,
 553                s1->bitstream_buffer_size);
 554         memset(s->bitstream_buffer + s->bitstream_buffer_size, 0,
 555                AV_INPUT_BUFFER_PADDING_SIZE);
 556     }
 557
 558     // linesize dependend scratch buffer allocation
 559     if (!s->sc.edge_emu_buffer)
 560         if (s1->linesize) {
 561             if (ff_mpeg_framesize_alloc(s->avctx, &s->me,
 562                                         &s->sc, s1->linesize) < 0) {
 563                 av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
 564                        "scratch buffers.\n");
 565                 return AVERROR(ENOMEM);
 566             }
 567         } else {
 568             av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not "
 569                    "be allocated due to unknown size.\n");
 570             return AVERROR_BUG;
 571         }
 572
 573     // MPEG2/interlacing info
 574     memcpy(&s->progressive_sequence, &s1->progressive_sequence,
 575            (char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
 576
 577     if (!s1->first_field) {
 578         s->last_pict_type = s1->pict_type;
 579         if (s1->current_picture_ptr)
 580             s->last_lambda_for[s1->pict_type] = s1->current_picture_ptr->f->quality;
 581     }
 582
 583     return 0;
 584 }
 585
 586 /**
 587  * Set the given MpegEncContext to common defaults
 588  * (same for encoding and decoding).
 589  * The changed fields will not depend upon the
 590  * prior state of the MpegEncContext.
 591  */
 592 void ff_mpv_common_defaults(MpegEncContext *s)
 593 {
 594     s->y_dc_scale_table      =
 595     s->c_dc_scale_table      = ff_mpeg1_dc_scale_table;
 596     s->chroma_qscale_table   = ff_default_chroma_qscale_table;
 597     s->progressive_frame     = 1;
 598     s->progressive_sequence  = 1;
 599     s->picture_structure     = PICT_FRAME;
 600
 601     s->coded_picture_number  = 0;
 602     s->picture_number        = 0;
 603
 604     s->f_code                = 1;
 605     s->b_code                = 1;
 606
 607     s->slice_context_count   = 1;
 608 }
 609
 610 /**
 611  * Set the given MpegEncContext to defaults for decoding.
 612  * the changed fields will not depend upon
 613  * the prior state of the MpegEncContext.
 614  */
 615 void ff_mpv_decode_defaults(MpegEncContext *s)
 616 {
 617     ff_mpv_common_defaults(s);
 618 }
 619
 620 /**
 621  * Initialize and allocates MpegEncContext fields dependent on the resolution.
 622  */
 623 static int init_context_frame(MpegEncContext *s)
 624 {
 625     int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;
 626
 627     s->mb_width   = (s->width + 15) / 16;
 628     s->mb_stride  = s->mb_width + 1;
 629     s->b8_stride  = s->mb_width * 2 + 1;
 630     mb_array_size = s->mb_height * s->mb_stride;
 631     mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
 632
 633     /* set default edge pos, will be overriden
 634      * in decode_header if needed */
 635     s->h_edge_pos = s->mb_width * 16;
 636     s->v_edge_pos = s->mb_height * 16;
 637
 638     s->mb_num     = s->mb_width * s->mb_height;
 639
 640     s->block_wrap[0] =
 641     s->block_wrap[1] =
 642     s->block_wrap[2] =
 643     s->block_wrap[3] = s->b8_stride;
 644     s->block_wrap[4] =
 645     s->block_wrap[5] = s->mb_stride;
 646
 647     y_size  = s->b8_stride * (2 * s->mb_height + 1);
 648     c_size  = s->mb_stride * (s->mb_height + 1);
 649     yc_size = y_size + 2   * c_size;
 650
 651     FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
 652                       fail); // error ressilience code looks cleaner with this
 653     for (y = 0; y < s->mb_height; y++)
 654         for (x = 0; x < s->mb_width; x++)
 655             s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
 656
 657     s->mb_index2xy[s->mb_height * s->mb_width] =
 658         (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
 659
 660     if (s->encoding) {
 661         /* Allocate MV tables */
 662         FF_ALLOCZ_OR_GOTO(s->avctx, s->p_mv_table_base,
 663                           mv_table_size * 2 * sizeof(int16_t), fail);
 664         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_forw_mv_table_base,
 665                           mv_table_size * 2 * sizeof(int16_t), fail);
 666         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_back_mv_table_base,
 667                           mv_table_size * 2 * sizeof(int16_t), fail);
 668         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_forw_mv_table_base,
 669                           mv_table_size * 2 * sizeof(int16_t), fail);
 670         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_bidir_back_mv_table_base,
 671                           mv_table_size * 2 * sizeof(int16_t), fail);
 672         FF_ALLOCZ_OR_GOTO(s->avctx, s->b_direct_mv_table_base,
 673                           mv_table_size * 2 * sizeof(int16_t), fail);
 674         s->p_mv_table            = s->p_mv_table_base + s->mb_stride + 1;
 675         s->b_forw_mv_table       = s->b_forw_mv_table_base + s->mb_stride + 1;
 676         s->b_back_mv_table       = s->b_back_mv_table_base + s->mb_stride + 1;
 677         s->b_bidir_forw_mv_table = s->b_bidir_forw_mv_table_base +
 678                                    s->mb_stride + 1;
 679         s->b_bidir_back_mv_table = s->b_bidir_back_mv_table_base +
 680                                    s->mb_stride + 1;
 681         s->b_direct_mv_table     = s->b_direct_mv_table_base + s->mb_stride + 1;
 682
 683         /* Allocate MB type table */
 684         FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_type, mb_array_size *
 685                           sizeof(uint16_t), fail); // needed for encoding
 686
 687         FF_ALLOCZ_OR_GOTO(s->avctx, s->lambda_table, mb_array_size *
 688                           sizeof(int), fail);
 689
 690         FF_ALLOC_OR_GOTO(s->avctx, s->cplx_tab,
 691                          mb_array_size * sizeof(float), fail);
 692         FF_ALLOC_OR_GOTO(s->avctx, s->bits_tab,
 693                          mb_array_size * sizeof(float), fail);
 694
 695     }
 696
 697     if (s->codec_id == AV_CODEC_ID_MPEG4 ||
 698         (s->avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)) {
 699         /* interlaced direct mode decoding tables */
 700         for (i = 0; i < 2; i++) {
 701             int j, k;
 702             for (j = 0; j < 2; j++) {
 703                 for (k = 0; k < 2; k++) {
 704                     FF_ALLOCZ_OR_GOTO(s->avctx,
 705                                       s->b_field_mv_table_base[i][j][k],
 706                                       mv_table_size * 2 * sizeof(int16_t),
 707                                       fail);
 708                     s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] +
 709                                                    s->mb_stride + 1;
 710                 }
 711                 FF_ALLOCZ_OR_GOTO(s->avctx, s->b_field_select_table [i][j],
 712                                   mb_array_size * 2 * sizeof(uint8_t), fail);
 713                 FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_mv_table_base[i][j],
 714                                   mv_table_size * 2 * sizeof(int16_t), fail);
 715                 s->p_field_mv_table[i][j] = s->p_field_mv_table_base[i][j]
 716                                             + s->mb_stride + 1;
 717             }
 718             FF_ALLOCZ_OR_GOTO(s->avctx, s->p_field_select_table[i],
 719                               mb_array_size * 2 * sizeof(uint8_t), fail);
 720         }
 721     }
 722     if (s->out_format == FMT_H263) {
 723         /* cbp values */
 724         FF_ALLOCZ_OR_GOTO(s->avctx, s->coded_block_base, y_size, fail);
 725         s->coded_block = s->coded_block_base + s->b8_stride + 1;
 726
 727         /* cbp, ac_pred, pred_dir */
 728         FF_ALLOCZ_OR_GOTO(s->avctx, s->cbp_table,
 729                           mb_array_size * sizeof(uint8_t), fail);
 730         FF_ALLOCZ_OR_GOTO(s->avctx, s->pred_dir_table,
 731                           mb_array_size * sizeof(uint8_t), fail);
 732     }
 733
 734     if (s->h263_pred || s->h263_plus || !s->encoding) {
 735         /* dc values */
 736         // MN: we need these for  error resilience of intra-frames
 737         FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base,
 738                           yc_size * sizeof(int16_t), fail);
 739         s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
 740         s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
 741         s->dc_val[2] = s->dc_val[1] + c_size;
 742         for (i = 0; i < yc_size; i++)
 743             s->dc_val_base[i] = 1024;
 744     }
 745
 746     /* which mb is a intra block */
 747     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
 748     memset(s->mbintra_table, 1, mb_array_size);
 749
 750     /* init macroblock skip table */
 751     FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
 752     // Note the + 1 is for  a quicker mpeg4 slice_end detection
 753
 754     return ff_mpeg_er_init(s);
 755 fail:
 756     return AVERROR(ENOMEM);
 757 }
 758
 759 /**
 760  * init common structure for both encoder and decoder.
 761  * this assumes that some variables like width/height are already set
 762  */
 763 av_cold int ff_mpv_common_init(MpegEncContext *s)
 764 {
 765     int i;
 766     int nb_slices = (HAVE_THREADS &&
 767                      s->avctx->active_thread_type & FF_THREAD_SLICE) ?
 768                     s->avctx->thread_count : 1;
 769
 770     if (s->encoding && s->avctx->slices)
 771         nb_slices = s->avctx->slices;
 772
 773     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
 774         s->mb_height = (s->height + 31) / 32 * 2;
 775     else
 776         s->mb_height = (s->height + 15) / 16;
 777
 778     if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
 779         av_log(s->avctx, AV_LOG_ERROR,
 780                "decoding to AV_PIX_FMT_NONE is not supported.\n");
 781         return -1;
 782     }
 783
 784     if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
 785         int max_slices;
 786         if (s->mb_height)
 787             max_slices = FFMIN(MAX_THREADS, s->mb_height);
 788         else
 789             max_slices = MAX_THREADS;
 790         av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
 791                " reducing to %d\n", nb_slices, max_slices);
 792         nb_slices = max_slices;
 793     }
 794
 795     if ((s->width || s->height) &&
 796         av_image_check_size(s->width, s->height, 0, s->avctx))
 797         return -1;
 798
 799     dct_init(s);
 800
 801     /* set chroma shifts */
 802     av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
 803                                      &s->chroma_x_shift,
 804                                      &s->chroma_y_shift);
 805
 806     /* convert fourcc to upper case */
 807     s->codec_tag          = avpriv_toupper4(s->avctx->codec_tag);
 808
 809     FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
 810                       MAX_PICTURE_COUNT * sizeof(Picture), fail);
 811     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 812         s->picture[i].f = av_frame_alloc();
 813         if (!s->picture[i].f)
 814             goto fail;
 815     }
 816     memset(&s->next_picture, 0, sizeof(s->next_picture));
 817     memset(&s->last_picture, 0, sizeof(s->last_picture));
 818     memset(&s->current_picture, 0, sizeof(s->current_picture));
 819     memset(&s->new_picture, 0, sizeof(s->new_picture));
 820     s->next_picture.f = av_frame_alloc();
 821     if (!s->next_picture.f)
 822         goto fail;
 823     s->last_picture.f = av_frame_alloc();
 824     if (!s->last_picture.f)
 825         goto fail;
 826     s->current_picture.f = av_frame_alloc();
 827     if (!s->current_picture.f)
 828         goto fail;
 829     s->new_picture.f = av_frame_alloc();
 830     if (!s->new_picture.f)
 831         goto fail;
 832
 833     if (s->width && s->height) {
 834         if (init_context_frame(s))
 835             goto fail;
 836
 837         s->parse_context.state = -1;
 838     }
 839
 840     s->context_initialized = 1;
 841     s->thread_context[0]   = s;
 842
 843     if (s->width && s->height) {
 844         if (nb_slices > 1) {
 845             for (i = 1; i < nb_slices; i++) {
 846                 s->thread_context[i] = av_malloc(sizeof(MpegEncContext));
 847                 memcpy(s->thread_context[i], s, sizeof(MpegEncContext));
 848             }
 849
 850             for (i = 0; i < nb_slices; i++) {
 851                 if (init_duplicate_context(s->thread_context[i]) < 0)
 852                     goto fail;
 853                     s->thread_context[i]->start_mb_y =
 854                         (s->mb_height * (i) + nb_slices / 2) / nb_slices;
 855                     s->thread_context[i]->end_mb_y   =
 856                         (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
 857             }
 858         } else {
 859             if (init_duplicate_context(s) < 0)
 860                 goto fail;
 861             s->start_mb_y = 0;
 862             s->end_mb_y   = s->mb_height;
 863         }
 864         s->slice_context_count = nb_slices;
 865     }
 866
 867     return 0;
 868  fail:
 869     ff_mpv_common_end(s);
 870     return -1;
 871 }
 872
 873 /**
 874  * Frees and resets MpegEncContext fields depending on the resolution.
 875  * Is used during resolution changes to avoid a full reinitialization of the
 876  * codec.
 877  */
 878 static void free_context_frame(MpegEncContext *s)
 879 {
 880     int i, j, k;
 881
 882     av_freep(&s->mb_type);
 883     av_freep(&s->p_mv_table_base);
 884     av_freep(&s->b_forw_mv_table_base);
 885     av_freep(&s->b_back_mv_table_base);
 886     av_freep(&s->b_bidir_forw_mv_table_base);
 887     av_freep(&s->b_bidir_back_mv_table_base);
 888     av_freep(&s->b_direct_mv_table_base);
 889     s->p_mv_table            = NULL;
 890     s->b_forw_mv_table       = NULL;
 891     s->b_back_mv_table       = NULL;
 892     s->b_bidir_forw_mv_table = NULL;
 893     s->b_bidir_back_mv_table = NULL;
 894     s->b_direct_mv_table     = NULL;
 895     for (i = 0; i < 2; i++) {
 896         for (j = 0; j < 2; j++) {
 897             for (k = 0; k < 2; k++) {
 898                 av_freep(&s->b_field_mv_table_base[i][j][k]);
 899                 s->b_field_mv_table[i][j][k] = NULL;
 900             }
 901             av_freep(&s->b_field_select_table[i][j]);
 902             av_freep(&s->p_field_mv_table_base[i][j]);
 903             s->p_field_mv_table[i][j] = NULL;
 904         }
 905         av_freep(&s->p_field_select_table[i]);
 906     }
 907
 908     av_freep(&s->dc_val_base);
 909     av_freep(&s->coded_block_base);
 910     av_freep(&s->mbintra_table);
 911     av_freep(&s->cbp_table);
 912     av_freep(&s->pred_dir_table);
 913
 914     av_freep(&s->mbskip_table);
 915
 916     av_freep(&s->er.error_status_table);
 917     av_freep(&s->er.er_temp_buffer);
 918     av_freep(&s->mb_index2xy);
 919     av_freep(&s->lambda_table);
 920     av_freep(&s->cplx_tab);
 921     av_freep(&s->bits_tab);
 922
 923     s->linesize = s->uvlinesize = 0;
 924 }
 925
 926 int ff_mpv_common_frame_size_change(MpegEncContext *s)
 927 {
 928     int i, err = 0;
 929
 930     if (s->slice_context_count > 1) {
 931         for (i = 0; i < s->slice_context_count; i++) {
 932             free_duplicate_context(s->thread_context[i]);
 933         }
 934         for (i = 1; i < s->slice_context_count; i++) {
 935             av_freep(&s->thread_context[i]);
 936         }
 937     } else
 938         free_duplicate_context(s);
 939
 940     free_context_frame(s);
 941
 942     if (s->picture)
 943         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
 944                 s->picture[i].needs_realloc = 1;
 945         }
 946
 947     s->last_picture_ptr         =
 948     s->next_picture_ptr         =
 949     s->current_picture_ptr      = NULL;
 950
 951     // init
 952     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
 953         s->mb_height = (s->height + 31) / 32 * 2;
 954     else
 955         s->mb_height = (s->height + 15) / 16;
 956
 957     if ((s->width || s->height) &&
 958         (err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
 959         goto fail;
 960
 961     if ((err = init_context_frame(s)))
 962         goto fail;
 963
 964     s->thread_context[0]   = s;
 965
 966     if (s->width && s->height) {
 967         int nb_slices = s->slice_context_count;
 968         if (nb_slices > 1) {
 969             for (i = 1; i < nb_slices; i++) {
 970                 s->thread_context[i] = av_malloc(sizeof(MpegEncContext));
 971                 memcpy(s->thread_context[i], s, sizeof(MpegEncContext));
 972             }
 973
 974             for (i = 0; i < nb_slices; i++) {
 975                 if ((err = init_duplicate_context(s->thread_context[i])) < 0)
 976                     goto fail;
 977                     s->thread_context[i]->start_mb_y =
 978                         (s->mb_height * (i) + nb_slices / 2) / nb_slices;
 979                     s->thread_context[i]->end_mb_y   =
 980                         (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
 981             }
 982         } else {
 983             if (init_duplicate_context(s) < 0)
 984                 goto fail;
 985             s->start_mb_y = 0;
 986             s->end_mb_y   = s->mb_height;
 987         }
 988         s->slice_context_count = nb_slices;
 989     }
 990
 991     return 0;
 992  fail:
 993     ff_mpv_common_end(s);
 994     return err;
 995 }
 996
 997 /* init common structure for both encoder and decoder */
 998 void ff_mpv_common_end(MpegEncContext *s)
 999 {
1000     int i;
1001
1002     if (s->slice_context_count > 1) {
1003         for (i = 0; i < s->slice_context_count; i++) {
1004             free_duplicate_context(s->thread_context[i]);
1005         }
1006         for (i = 1; i < s->slice_context_count; i++) {
1007             av_freep(&s->thread_context[i]);
1008         }
1009         s->slice_context_count = 1;
1010     } else free_duplicate_context(s);
1011
1012     av_freep(&s->parse_context.buffer);
1013     s->parse_context.buffer_size = 0;
1014
1015     av_freep(&s->bitstream_buffer);
1016     s->allocated_bitstream_buffer_size = 0;
1017
1018     if (s->picture) {
1019         for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1020             ff_free_picture_tables(&s->picture[i]);
1021             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1022             av_frame_free(&s->picture[i].f);
1023         }
1024     }
1025     av_freep(&s->picture);
1026     ff_free_picture_tables(&s->last_picture);
1027     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1028     av_frame_free(&s->last_picture.f);
1029     ff_free_picture_tables(&s->current_picture);
1030     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1031     av_frame_free(&s->current_picture.f);
1032     ff_free_picture_tables(&s->next_picture);
1033     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1034     av_frame_free(&s->next_picture.f);
1035     ff_free_picture_tables(&s->new_picture);
1036     ff_mpeg_unref_picture(s->avctx, &s->new_picture);
1037     av_frame_free(&s->new_picture.f);
1038
1039     free_context_frame(s);
1040
1041     s->context_initialized      = 0;
1042     s->last_picture_ptr         =
1043     s->next_picture_ptr         =
1044     s->current_picture_ptr      = NULL;
1045     s->linesize = s->uvlinesize = 0;
1046 }
1047
1048 /**
1049  * generic function called after decoding
1050  * the header and before a frame is decoded.
1051  */
1052 int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
1053 {
1054     int i, ret;
1055     Picture *pic;
1056     s->mb_skipped = 0;
1057
1058     /* mark & release old frames */
1059     if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
1060         s->last_picture_ptr != s->next_picture_ptr &&
1061         s->last_picture_ptr->f->buf[0]) {
1062         ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr);
1063     }
1064
1065     /* release forgotten pictures */
1066     /* if (mpeg124/h263) */
1067     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1068         if (&s->picture[i] != s->last_picture_ptr &&
1069             &s->picture[i] != s->next_picture_ptr &&
1070             s->picture[i].reference && !s->picture[i].needs_realloc) {
1071             if (!(avctx->active_thread_type & FF_THREAD_FRAME))
1072                 av_log(avctx, AV_LOG_ERROR,
1073                        "releasing zombie picture\n");
1074             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1075         }
1076     }
1077
1078     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1079
1080     /* release non reference frames */
1081     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1082         if (!s->picture[i].reference)
1083             ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1084     }
1085
1086     if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) {
1087         // we already have a unused image
1088         // (maybe it was set before reading the header)
1089         pic = s->current_picture_ptr;
1090     } else {
1091         i   = ff_find_unused_picture(s->avctx, s->picture, 0);
1092         if (i < 0) {
1093             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1094             return i;
1095         }
1096         pic = &s->picture[i];
1097     }
1098
1099     pic->reference = 0;
1100     if (!s->droppable) {
1101         if (s->pict_type != AV_PICTURE_TYPE_B)
1102             pic->reference = 3;
1103     }
1104
1105     pic->f->coded_picture_number = s->coded_picture_number++;
1106
1107     if (alloc_picture(s, pic, 0) < 0)
1108         return -1;
1109
1110     s->current_picture_ptr = pic;
1111     // FIXME use only the vars from current_pic
1112     s->current_picture_ptr->f->top_field_first = s->top_field_first;
1113     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
1114         s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1115         if (s->picture_structure != PICT_FRAME)
1116             s->current_picture_ptr->f->top_field_first =
1117                 (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
1118     }
1119     s->current_picture_ptr->f->interlaced_frame = !s->progressive_frame &&
1120                                                  !s->progressive_sequence;
1121     s->current_picture_ptr->field_picture      =  s->picture_structure != PICT_FRAME;
1122
1123     s->current_picture_ptr->f->pict_type = s->pict_type;
1124     // if (s->avctx->flags && AV_CODEC_FLAG_QSCALE)
1125     //     s->current_picture_ptr->quality = s->new_picture_ptr->quality;
1126     s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
1127
1128     if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture,
1129                                    s->current_picture_ptr)) < 0)
1130         return ret;
1131
1132     if (s->pict_type != AV_PICTURE_TYPE_B) {
1133         s->last_picture_ptr = s->next_picture_ptr;
1134         if (!s->droppable)
1135             s->next_picture_ptr = s->current_picture_ptr;
1136     }
1137     ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1138             s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr,
1139             s->last_picture_ptr    ? s->last_picture_ptr->f->data[0]    : NULL,
1140             s->next_picture_ptr    ? s->next_picture_ptr->f->data[0]    : NULL,
1141             s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL,
1142             s->pict_type, s->droppable);
1143
1144     if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
1145         (s->pict_type != AV_PICTURE_TYPE_I ||
1146          s->picture_structure != PICT_FRAME)) {
1147         int h_chroma_shift, v_chroma_shift;
1148         av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
1149                                          &h_chroma_shift, &v_chroma_shift);
1150         if (s->pict_type != AV_PICTURE_TYPE_I)
1151             av_log(avctx, AV_LOG_ERROR,
1152                    "warning: first frame is no keyframe\n");
1153         else if (s->picture_structure != PICT_FRAME)
1154             av_log(avctx, AV_LOG_INFO,
1155                    "allocate dummy last picture for field based first keyframe\n");
1156
1157         /* Allocate a dummy frame */
1158         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1159         if (i < 0) {
1160             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1161             return i;
1162         }
1163         s->last_picture_ptr = &s->picture[i];
1164
1165         s->last_picture_ptr->reference   = 3;
1166         s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_I;
1167
1168         if (alloc_picture(s, s->last_picture_ptr, 0) < 0) {
1169             s->last_picture_ptr = NULL;
1170             return -1;
1171         }
1172
1173         memset(s->last_picture_ptr->f->data[0], 0,
1174                avctx->height * s->last_picture_ptr->f->linesize[0]);
1175         memset(s->last_picture_ptr->f->data[1], 0x80,
1176                (avctx->height >> v_chroma_shift) *
1177                s->last_picture_ptr->f->linesize[1]);
1178         memset(s->last_picture_ptr->f->data[2], 0x80,
1179                (avctx->height >> v_chroma_shift) *
1180                s->last_picture_ptr->f->linesize[2]);
1181
1182         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
1183         ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
1184     }
1185     if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) &&
1186         s->pict_type == AV_PICTURE_TYPE_B) {
1187         /* Allocate a dummy frame */
1188         i = ff_find_unused_picture(s->avctx, s->picture, 0);
1189         if (i < 0) {
1190             av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1191             return i;
1192         }
1193         s->next_picture_ptr = &s->picture[i];
1194
1195         s->next_picture_ptr->reference   = 3;
1196         s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_I;
1197
1198         if (alloc_picture(s, s->next_picture_ptr, 0) < 0) {
1199             s->next_picture_ptr = NULL;
1200             return -1;
1201         }
1202         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
1203         ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
1204     }
1205
1206     if (s->last_picture_ptr) {
1207         ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1208         if (s->last_picture_ptr->f->buf[0] &&
1209             (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture,
1210                                        s->last_picture_ptr)) < 0)
1211             return ret;
1212     }
1213     if (s->next_picture_ptr) {
1214         ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1215         if (s->next_picture_ptr->f->buf[0] &&
1216             (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture,
1217                                        s->next_picture_ptr)) < 0)
1218             return ret;
1219     }
1220
1221     if (s->pict_type != AV_PICTURE_TYPE_I &&
1222         !(s->last_picture_ptr && s->last_picture_ptr->f->buf[0])) {
1223         av_log(s, AV_LOG_ERROR,
1224                "Non-reference picture received and no reference available\n");
1225         return AVERROR_INVALIDDATA;
1226     }
1227
1228     if (s->picture_structure!= PICT_FRAME) {
1229         int i;
1230         for (i = 0; i < 4; i++) {
1231             if (s->picture_structure == PICT_BOTTOM_FIELD) {
1232                 s->current_picture.f->data[i] +=
1233                     s->current_picture.f->linesize[i];
1234             }
1235             s->current_picture.f->linesize[i] *= 2;
1236             s->last_picture.f->linesize[i]    *= 2;
1237             s->next_picture.f->linesize[i]    *= 2;
1238         }
1239     }
1240
1241     /* set dequantizer, we can't do it during init as
1242      * it might change for mpeg4 and we can't do it in the header
1243      * decode as init is not called for mpeg4 there yet */
1244     if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
1245         s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
1246         s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
1247     } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
1248         s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
1249         s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
1250     } else {
1251         s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
1252         s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
1253     }
1254
1255 #if FF_API_XVMC
1256 FF_DISABLE_DEPRECATION_WARNINGS
1257     if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1258         return ff_xvmc_field_start(s, avctx);
1259 FF_ENABLE_DEPRECATION_WARNINGS
1260 #endif /* FF_API_XVMC */
1261
1262     return 0;
1263 }
1264
1265 /* called after a frame has been decoded. */
1266 void ff_mpv_frame_end(MpegEncContext *s)
1267 {
1268 #if FF_API_XVMC
1269 FF_DISABLE_DEPRECATION_WARNINGS
1270     /* redraw edges for the frame if decoding didn't complete */
1271     // just to make sure that all data is rendered.
1272     if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) {
1273         ff_xvmc_field_end(s);
1274     } else
1275 FF_ENABLE_DEPRECATION_WARNINGS
1276 #endif /* FF_API_XVMC */
1277
1278     emms_c();
1279
1280     if (s->current_picture.reference)
1281         ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1282 }
1283
1284 /**
1285  * Print debugging info for the given picture.
1286  */
1287 void ff_print_debug_info(MpegEncContext *s, Picture *p)
1288 {
1289     AVFrame *pict;
1290     if (s->avctx->hwaccel || !p || !p->mb_type)
1291         return;
1292     pict = p->f;
1293
1294     if (s->avctx->debug & (FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE)) {
1295         int x,y;
1296
1297         av_log(s->avctx,AV_LOG_DEBUG,"New frame, type: ");
1298         switch (pict->pict_type) {
1299         case AV_PICTURE_TYPE_I:
1300             av_log(s->avctx,AV_LOG_DEBUG,"I\n");
1301             break;
1302         case AV_PICTURE_TYPE_P:
1303             av_log(s->avctx,AV_LOG_DEBUG,"P\n");
1304             break;
1305         case AV_PICTURE_TYPE_B:
1306             av_log(s->avctx,AV_LOG_DEBUG,"B\n");
1307             break;
1308         case AV_PICTURE_TYPE_S:
1309             av_log(s->avctx,AV_LOG_DEBUG,"S\n");
1310             break;
1311         case AV_PICTURE_TYPE_SI:
1312             av_log(s->avctx,AV_LOG_DEBUG,"SI\n");
1313             break;
1314         case AV_PICTURE_TYPE_SP:
1315             av_log(s->avctx,AV_LOG_DEBUG,"SP\n");
1316             break;
1317         }
1318         for (y = 0; y < s->mb_height; y++) {
1319             for (x = 0; x < s->mb_width; x++) {
1320                 if (s->avctx->debug & FF_DEBUG_SKIP) {
1321                     int count = s->mbskip_table[x + y * s->mb_stride];
1322                     if (count > 9)
1323                         count = 9;
1324                     av_log(s->avctx, AV_LOG_DEBUG, "%1d", count);
1325                 }
1326                 if (s->avctx->debug & FF_DEBUG_QP) {
1327                     av_log(s->avctx, AV_LOG_DEBUG, "%2d",
1328                            p->qscale_table[x + y * s->mb_stride]);
1329                 }
1330                 if (s->avctx->debug & FF_DEBUG_MB_TYPE) {
1331                     int mb_type = p->mb_type[x + y * s->mb_stride];
1332                     // Type & MV direction
1333                     if (IS_PCM(mb_type))
1334                         av_log(s->avctx, AV_LOG_DEBUG, "P");
1335                     else if (IS_INTRA(mb_type) && IS_ACPRED(mb_type))
1336                         av_log(s->avctx, AV_LOG_DEBUG, "A");
1337                     else if (IS_INTRA4x4(mb_type))
1338                         av_log(s->avctx, AV_LOG_DEBUG, "i");
1339                     else if (IS_INTRA16x16(mb_type))
1340                         av_log(s->avctx, AV_LOG_DEBUG, "I");
1341                     else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type))
1342                         av_log(s->avctx, AV_LOG_DEBUG, "d");
1343                     else if (IS_DIRECT(mb_type))
1344                         av_log(s->avctx, AV_LOG_DEBUG, "D");
1345                     else if (IS_GMC(mb_type) && IS_SKIP(mb_type))
1346                         av_log(s->avctx, AV_LOG_DEBUG, "g");
1347                     else if (IS_GMC(mb_type))
1348                         av_log(s->avctx, AV_LOG_DEBUG, "G");
1349                     else if (IS_SKIP(mb_type))
1350                         av_log(s->avctx, AV_LOG_DEBUG, "S");
1351                     else if (!USES_LIST(mb_type, 1))
1352                         av_log(s->avctx, AV_LOG_DEBUG, ">");
1353                     else if (!USES_LIST(mb_type, 0))
1354                         av_log(s->avctx, AV_LOG_DEBUG, "<");
1355                     else {
1356                         assert(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
1357                         av_log(s->avctx, AV_LOG_DEBUG, "X");
1358                     }
1359
1360                     // segmentation
1361                     if (IS_8X8(mb_type))
1362                         av_log(s->avctx, AV_LOG_DEBUG, "+");
1363                     else if (IS_16X8(mb_type))
1364                         av_log(s->avctx, AV_LOG_DEBUG, "-");
1365                     else if (IS_8X16(mb_type))
1366                         av_log(s->avctx, AV_LOG_DEBUG, "|");
1367                     else if (IS_INTRA(mb_type) || IS_16X16(mb_type))
1368                         av_log(s->avctx, AV_LOG_DEBUG, " ");
1369                     else
1370                         av_log(s->avctx, AV_LOG_DEBUG, "?");
1371
1372
1373                     if (IS_INTERLACED(mb_type))
1374                         av_log(s->avctx, AV_LOG_DEBUG, "=");
1375                     else
1376                         av_log(s->avctx, AV_LOG_DEBUG, " ");
1377                 }
1378             }
1379             av_log(s->avctx, AV_LOG_DEBUG, "\n");
1380         }
1381     }
1382 }
1383
1384 /**
1385  * find the lowest MB row referenced in the MVs
1386  */
1387 static int lowest_referenced_row(MpegEncContext *s, int dir)
1388 {
1389     int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
1390     int my, off, i, mvs;
1391
1392     if (s->picture_structure != PICT_FRAME || s->mcsel)
1393         goto unhandled;
1394
1395     switch (s->mv_type) {
1396         case MV_TYPE_16X16:
1397             mvs = 1;
1398             break;
1399         case MV_TYPE_16X8:
1400             mvs = 2;
1401             break;
1402         case MV_TYPE_8X8:
1403             mvs = 4;
1404             break;
1405         default:
1406             goto unhandled;
1407     }
1408
1409     for (i = 0; i < mvs; i++) {
1410         my = s->mv[dir][i][1]<<qpel_shift;
1411         my_max = FFMAX(my_max, my);
1412         my_min = FFMIN(my_min, my);
1413     }
1414
1415     off = (FFMAX(-my_min, my_max) + 63) >> 6;
1416
1417     return FFMIN(FFMAX(s->mb_y + off, 0), s->mb_height-1);
1418 unhandled:
1419     return s->mb_height-1;
1420 }
1421
1422 /* put block[] to dest[] */
1423 static inline void put_dct(MpegEncContext *s,
1424                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1425 {
1426     s->dct_unquantize_intra(s, block, i, qscale);
1427     s->idsp.idct_put(dest, line_size, block);
1428 }
1429
1430 /* add block[] to dest[] */
1431 static inline void add_dct(MpegEncContext *s,
1432                            int16_t *block, int i, uint8_t *dest, int line_size)
1433 {
1434     if (s->block_last_index[i] >= 0) {
1435         s->idsp.idct_add(dest, line_size, block);
1436     }
1437 }
1438
1439 static inline void add_dequant_dct(MpegEncContext *s,
1440                            int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
1441 {
1442     if (s->block_last_index[i] >= 0) {
1443         s->dct_unquantize_inter(s, block, i, qscale);
1444
1445         s->idsp.idct_add(dest, line_size, block);
1446     }
1447 }
1448
1449 /**
1450  * Clean dc, ac, coded_block for the current non-intra MB.
1451  */
1452 void ff_clean_intra_table_entries(MpegEncContext *s)
1453 {
1454     int wrap = s->b8_stride;
1455     int xy = s->block_index[0];
1456
1457     s->dc_val[0][xy           ] =
1458     s->dc_val[0][xy + 1       ] =
1459     s->dc_val[0][xy     + wrap] =
1460     s->dc_val[0][xy + 1 + wrap] = 1024;
1461     /* ac pred */
1462     memset(s->ac_val[0][xy       ], 0, 32 * sizeof(int16_t));
1463     memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
1464     if (s->msmpeg4_version>=3) {
1465         s->coded_block[xy           ] =
1466         s->coded_block[xy + 1       ] =
1467         s->coded_block[xy     + wrap] =
1468         s->coded_block[xy + 1 + wrap] = 0;
1469     }
1470     /* chroma */
1471     wrap = s->mb_stride;
1472     xy = s->mb_x + s->mb_y * wrap;
1473     s->dc_val[1][xy] =
1474     s->dc_val[2][xy] = 1024;
1475     /* ac pred */
1476     memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
1477     memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
1478
1479     s->mbintra_table[xy]= 0;
1480 }
1481
1482 /* generic function called after a macroblock has been parsed by the
1483    decoder or after it has been encoded by the encoder.
1484
1485    Important variables used:
1486    s->mb_intra : true if intra macroblock
1487    s->mv_dir   : motion vector direction
1488    s->mv_type  : motion vector type
1489    s->mv       : motion vector
1490    s->interlaced_dct : true if interlaced dct used (mpeg2)
1491  */
1492 static av_always_inline
1493 void mpv_decode_mb_internal(MpegEncContext *s, int16_t block[12][64],
1494                             int is_mpeg12)
1495 {
1496     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
1497
1498 #if FF_API_XVMC
1499 FF_DISABLE_DEPRECATION_WARNINGS
1500     if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration){
1501         ff_xvmc_decode_mb(s);//xvmc uses pblocks
1502         return;
1503     }
1504 FF_ENABLE_DEPRECATION_WARNINGS
1505 #endif /* FF_API_XVMC */
1506
1507     if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
1508        /* print DCT coefficients */
1509        int i,j;
1510        av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
1511        for(i=0; i<6; i++){
1512            for(j=0; j<64; j++){
1513                av_log(s->avctx, AV_LOG_DEBUG, "%5d",
1514                       block[i][s->idsp.idct_permutation[j]]);
1515            }
1516            av_log(s->avctx, AV_LOG_DEBUG, "\n");
1517        }
1518     }
1519
1520     s->current_picture.qscale_table[mb_xy] = s->qscale;
1521
1522     /* update DC predictors for P macroblocks */
1523     if (!s->mb_intra) {
1524         if (!is_mpeg12 && (s->h263_pred || s->h263_aic)) {
1525             if(s->mbintra_table[mb_xy])
1526                 ff_clean_intra_table_entries(s);
1527         } else {
1528             s->last_dc[0] =
1529             s->last_dc[1] =
1530             s->last_dc[2] = 128 << s->intra_dc_precision;
1531         }
1532     }
1533     else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
1534         s->mbintra_table[mb_xy]=1;
1535
1536     if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) ||
1537         !(s->encoding && (s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
1538           s->avctx->mb_decision != FF_MB_DECISION_RD)) { // FIXME precalc
1539         uint8_t *dest_y, *dest_cb, *dest_cr;
1540         int dct_linesize, dct_offset;
1541         op_pixels_func (*op_pix)[4];
1542         qpel_mc_func (*op_qpix)[16];
1543         const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
1544         const int uvlinesize = s->current_picture.f->linesize[1];
1545         const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band;
1546         const int block_size = 8;
1547
1548         /* avoid copy if macroblock skipped in last frame too */
1549         /* skip only during decoding as we might trash the buffers during encoding a bit */
1550         if(!s->encoding){
1551             uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
1552
1553             if (s->mb_skipped) {
1554                 s->mb_skipped= 0;
1555                 assert(s->pict_type!=AV_PICTURE_TYPE_I);
1556                 *mbskip_ptr = 1;
1557             } else if(!s->current_picture.reference) {
1558                 *mbskip_ptr = 1;
1559             } else{
1560                 *mbskip_ptr = 0; /* not skipped */
1561             }
1562         }
1563
1564         dct_linesize = linesize << s->interlaced_dct;
1565         dct_offset   = s->interlaced_dct ? linesize : linesize * block_size;
1566
1567         if(readable){
1568             dest_y=  s->dest[0];
1569             dest_cb= s->dest[1];
1570             dest_cr= s->dest[2];
1571         }else{
1572             dest_y = s->sc.b_scratchpad;
1573             dest_cb= s->sc.b_scratchpad+16*linesize;
1574             dest_cr= s->sc.b_scratchpad+32*linesize;
1575         }
1576
1577         if (!s->mb_intra) {
1578             /* motion handling */
1579             /* decoding or more than one mb_type (MC was already done otherwise) */
1580             if(!s->encoding){
1581
1582                 if(HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
1583                     if (s->mv_dir & MV_DIR_FORWARD) {
1584                         ff_thread_await_progress(&s->last_picture_ptr->tf,
1585                                                  lowest_referenced_row(s, 0),
1586                                                  0);
1587                     }
1588                     if (s->mv_dir & MV_DIR_BACKWARD) {
1589                         ff_thread_await_progress(&s->next_picture_ptr->tf,
1590                                                  lowest_referenced_row(s, 1),
1591                                                  0);
1592                     }
1593                 }
1594
1595                 op_qpix= s->me.qpel_put;
1596                 if ((!s->no_rounding) || s->pict_type==AV_PICTURE_TYPE_B){
1597                     op_pix = s->hdsp.put_pixels_tab;
1598                 }else{
1599                     op_pix = s->hdsp.put_no_rnd_pixels_tab;
1600                 }
1601                 if (s->mv_dir & MV_DIR_FORWARD) {
1602                     ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix, op_qpix);
1603                     op_pix = s->hdsp.avg_pixels_tab;
1604                     op_qpix= s->me.qpel_avg;
1605                 }
1606                 if (s->mv_dir & MV_DIR_BACKWARD) {
1607                     ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix, op_qpix);
1608                 }
1609             }
1610
1611             /* skip dequant / idct if we are really late ;) */
1612             if(s->avctx->skip_idct){
1613                 if(  (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
1614                    ||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
1615                    || s->avctx->skip_idct >= AVDISCARD_ALL)
1616                     goto skip_idct;
1617             }
1618
1619             /* add dct residue */
1620             if(s->encoding || !(   s->msmpeg4_version || s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO
1621                                 || (s->codec_id==AV_CODEC_ID_MPEG4 && !s->mpeg_quant))){
1622                 add_dequant_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
1623                 add_dequant_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
1624                 add_dequant_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
1625                 add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
1626
1627                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1628                     if (s->chroma_y_shift){
1629                         add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
1630                         add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
1631                     }else{
1632                         dct_linesize >>= 1;
1633                         dct_offset >>=1;
1634                         add_dequant_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
1635                         add_dequant_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
1636                         add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
1637                         add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
1638                     }
1639                 }
1640             } else if(is_mpeg12 || (s->codec_id != AV_CODEC_ID_WMV2)){
1641                 add_dct(s, block[0], 0, dest_y                          , dct_linesize);
1642                 add_dct(s, block[1], 1, dest_y              + block_size, dct_linesize);
1643                 add_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize);
1644                 add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
1645
1646                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1647                     if(s->chroma_y_shift){//Chroma420
1648                         add_dct(s, block[4], 4, dest_cb, uvlinesize);
1649                         add_dct(s, block[5], 5, dest_cr, uvlinesize);
1650                     }else{
1651                         //chroma422
1652                         dct_linesize = uvlinesize << s->interlaced_dct;
1653                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize * 8;
1654
1655                         add_dct(s, block[4], 4, dest_cb, dct_linesize);
1656                         add_dct(s, block[5], 5, dest_cr, dct_linesize);
1657                         add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
1658                         add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
1659                         if(!s->chroma_x_shift){//Chroma444
1660                             add_dct(s, block[8], 8, dest_cb+8, dct_linesize);
1661                             add_dct(s, block[9], 9, dest_cr+8, dct_linesize);
1662                             add_dct(s, block[10], 10, dest_cb+8+dct_offset, dct_linesize);
1663                             add_dct(s, block[11], 11, dest_cr+8+dct_offset, dct_linesize);
1664                         }
1665                     }
1666                 }//fi gray
1667             }
1668             else if (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) {
1669                 ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
1670             }
1671         } else {
1672             /* dct only in intra block */
1673             if(s->encoding || !(s->codec_id==AV_CODEC_ID_MPEG1VIDEO || s->codec_id==AV_CODEC_ID_MPEG2VIDEO)){
1674                 put_dct(s, block[0], 0, dest_y                          , dct_linesize, s->qscale);
1675                 put_dct(s, block[1], 1, dest_y              + block_size, dct_linesize, s->qscale);
1676                 put_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
1677                 put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
1678
1679                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1680                     if(s->chroma_y_shift){
1681                         put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
1682                         put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
1683                     }else{
1684                         dct_offset >>=1;
1685                         dct_linesize >>=1;
1686                         put_dct(s, block[4], 4, dest_cb,              dct_linesize, s->chroma_qscale);
1687                         put_dct(s, block[5], 5, dest_cr,              dct_linesize, s->chroma_qscale);
1688                         put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
1689                         put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
1690                     }
1691                 }
1692             }else{
1693                 s->idsp.idct_put(dest_y,                           dct_linesize, block[0]);
1694                 s->idsp.idct_put(dest_y              + block_size, dct_linesize, block[1]);
1695                 s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, block[2]);
1696                 s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
1697
1698                 if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1699                     if(s->chroma_y_shift){
1700                         s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
1701                         s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
1702                     }else{
1703
1704                         dct_linesize = uvlinesize << s->interlaced_dct;
1705                         dct_offset   = s->interlaced_dct ? uvlinesize : uvlinesize * 8;
1706
1707                         s->idsp.idct_put(dest_cb,              dct_linesize, block[4]);
1708                         s->idsp.idct_put(dest_cr,              dct_linesize, block[5]);
1709                         s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
1710                         s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
1711                         if(!s->chroma_x_shift){//Chroma444
1712                             s->idsp.idct_put(dest_cb + 8,              dct_linesize, block[8]);
1713                             s->idsp.idct_put(dest_cr + 8,              dct_linesize, block[9]);
1714                             s->idsp.idct_put(dest_cb + 8 + dct_offset, dct_linesize, block[10]);
1715                             s->idsp.idct_put(dest_cr + 8 + dct_offset, dct_linesize, block[11]);
1716                         }
1717                     }
1718                 }//gray
1719             }
1720         }
1721 skip_idct:
1722         if(!readable){
1723             s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y ,   linesize,16);
1724             s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize,16 >> s->chroma_y_shift);
1725             s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize,16 >> s->chroma_y_shift);
1726         }
1727     }
1728 }
1729
1730 void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64])
1731 {
1732 #if !CONFIG_SMALL
1733     if(s->out_format == FMT_MPEG1) {
1734         mpv_decode_mb_internal(s, block, 1);
1735     } else
1736 #endif
1737         mpv_decode_mb_internal(s, block, 0);
1738 }
1739
1740 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
1741 {
1742     ff_draw_horiz_band(s->avctx, s->current_picture.f,
1743                        s->last_picture.f, y, h, s->picture_structure,
1744                        s->first_field, s->low_delay);
1745 }
1746
1747 void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
1748     const int linesize   = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
1749     const int uvlinesize = s->current_picture.f->linesize[1];
1750     const int mb_size= 4;
1751
1752     s->block_index[0]= s->b8_stride*(s->mb_y*2    ) - 2 + s->mb_x*2;
1753     s->block_index[1]= s->b8_stride*(s->mb_y*2    ) - 1 + s->mb_x*2;
1754     s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
1755     s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
1756     s->block_index[4]= s->mb_stride*(s->mb_y + 1)                + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
1757     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;
1758     //block_index is not used by mpeg2, so it is not affected by chroma_format
1759
1760     s->dest[0] = s->current_picture.f->data[0] + ((s->mb_x - 1) <<  mb_size);
1761     s->dest[1] = s->current_picture.f->data[1] + ((s->mb_x - 1) << (mb_size - s->chroma_x_shift));
1762     s->dest[2] = s->current_picture.f->data[2] + ((s->mb_x - 1) << (mb_size - s->chroma_x_shift));
1763
1764     if(!(s->pict_type==AV_PICTURE_TYPE_B && s->avctx->draw_horiz_band && s->picture_structure==PICT_FRAME))
1765     {
1766         if(s->picture_structure==PICT_FRAME){
1767         s->dest[0] += s->mb_y *   linesize << mb_size;
1768         s->dest[1] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
1769         s->dest[2] += s->mb_y * uvlinesize << (mb_size - s->chroma_y_shift);
1770         }else{
1771             s->dest[0] += (s->mb_y>>1) *   linesize << mb_size;
1772             s->dest[1] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
1773             s->dest[2] += (s->mb_y>>1) * uvlinesize << (mb_size - s->chroma_y_shift);
1774             assert((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
1775         }
1776     }
1777 }
1778
1779 void ff_mpeg_flush(AVCodecContext *avctx){
1780     int i;
1781     MpegEncContext *s = avctx->priv_data;
1782
1783     if (!s || !s->picture)
1784         return;
1785
1786     for (i = 0; i < MAX_PICTURE_COUNT; i++)
1787         ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
1788     s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
1789
1790     ff_mpeg_unref_picture(s->avctx, &s->current_picture);
1791     ff_mpeg_unref_picture(s->avctx, &s->last_picture);
1792     ff_mpeg_unref_picture(s->avctx, &s->next_picture);
1793
1794     s->mb_x= s->mb_y= 0;
1795
1796     s->parse_context.state= -1;
1797     s->parse_context.frame_start_found= 0;
1798     s->parse_context.overread= 0;
1799     s->parse_context.overread_index= 0;
1800     s->parse_context.index= 0;
1801     s->parse_context.last_index= 0;
1802     s->bitstream_buffer_size=0;
1803     s->pp_time=0;
1804 }
1805
1806 /**
1807  * set qscale and update qscale dependent variables.
1808  */
1809 void ff_set_qscale(MpegEncContext * s, int qscale)
1810 {
1811     if (qscale < 1)
1812         qscale = 1;
1813     else if (qscale > 31)
1814         qscale = 31;
1815
1816     s->qscale = qscale;
1817     s->chroma_qscale= s->chroma_qscale_table[qscale];
1818
1819     s->y_dc_scale= s->y_dc_scale_table[ qscale ];
1820     s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ];
1821 }
1822
1823 void ff_mpv_report_decode_progress(MpegEncContext *s)
1824 {
1825     if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred)
1826         ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0);
1827 }