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