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