git.sesse.net Git - x264/blob - encoder/encoder.c

   1 /*****************************************************************************
   2  * x264: h264 encoder
   3  *****************************************************************************
   4  * Copyright (C) 2003-2008 x264 project
   5  *
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *          Loren Merritt <lorenm@u.washington.edu>
   8  *          Fiona Glaser <fiona@x264.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program 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
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 #include <math.h>
  26
  27 #include "common/common.h"
  28 #include "common/cpu.h"
  29
  30 #include "set.h"
  31 #include "analyse.h"
  32 #include "ratecontrol.h"
  33 #include "macroblock.h"
  34 #include "me.h"
  35
  36 #ifdef HAVE_VISUALIZE
  37 #include "common/visualize.h"
  38 #endif
  39
  40 //#define DEBUG_MB_TYPE
  41
  42 #define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
  43
  44 #define bs_write_ue bs_write_ue_big
  45
  46 static int x264_encoder_frame_end( x264_t *h, x264_t *thread_current,
  47                                    x264_nal_t **pp_nal, int *pi_nal,
  48                                    x264_picture_t *pic_out );
  49
  50 /****************************************************************************
  51  *
  52  ******************************* x264 libs **********************************
  53  *
  54  ****************************************************************************/
  55 static float x264_psnr( int64_t i_sqe, int64_t i_size )
  56 {
  57     double f_mse = (double)i_sqe / ((double)65025.0 * (double)i_size);
  58     if( f_mse <= 0.0000000001 ) /* Max 100dB */
  59         return 100;
  60
  61     return (float)(-10.0 * log( f_mse ) / log( 10.0 ));
  62 }
  63
  64 static void x264_frame_dump( x264_t *h )
  65 {
  66     FILE *f = fopen( h->param.psz_dump_yuv, "r+b" );
  67     int i, y;
  68     if( !f )
  69         return;
  70     /* Write the frame in display order */
  71     fseek( f, (uint64_t)h->fdec->i_frame * h->param.i_height * h->param.i_width * 3/2, SEEK_SET );
  72     for( i = 0; i < h->fdec->i_plane; i++ )
  73         for( y = 0; y < h->param.i_height >> !!i; y++ )
  74             fwrite( &h->fdec->plane[i][y*h->fdec->i_stride[i]], 1, h->param.i_width >> !!i, f );
  75     fclose( f );
  76 }
  77
  78
  79 /* Fill "default" values */
  80 static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
  81                                     x264_sps_t *sps, x264_pps_t *pps,
  82                                     int i_idr_pic_id, int i_frame, int i_qp )
  83 {
  84     x264_param_t *param = &h->param;
  85     int i;
  86
  87     /* First we fill all fields */
  88     sh->sps = sps;
  89     sh->pps = pps;
  90
  91     sh->i_first_mb  = 0;
  92     sh->i_last_mb   = h->mb.i_mb_count - 1;
  93     sh->i_pps_id    = pps->i_id;
  94
  95     sh->i_frame_num = i_frame;
  96
  97     sh->b_mbaff = h->param.b_interlaced;
  98     sh->b_field_pic = 0;    /* no field support for now */
  99     sh->b_bottom_field = 0; /* not yet used */
 100
 101     sh->i_idr_pic_id = i_idr_pic_id;
 102
 103     /* poc stuff, fixed later */
 104     sh->i_poc_lsb = 0;
 105     sh->i_delta_poc_bottom = 0;
 106     sh->i_delta_poc[0] = 0;
 107     sh->i_delta_poc[1] = 0;
 108
 109     sh->i_redundant_pic_cnt = 0;
 110
 111     h->mb.b_direct_auto_write = h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_AUTO
 112                                 && h->param.i_bframe
 113                                 && ( h->param.rc.b_stat_write || !h->param.rc.b_stat_read );
 114
 115     if( !h->mb.b_direct_auto_read && sh->i_type == SLICE_TYPE_B )
 116     {
 117         if( h->fref1[0]->i_poc_l0ref0 == h->fref0[0]->i_poc )
 118         {
 119             if( h->mb.b_direct_auto_write )
 120                 sh->b_direct_spatial_mv_pred = ( h->stat.i_direct_score[1] > h->stat.i_direct_score[0] );
 121             else
 122                 sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
 123         }
 124         else
 125         {
 126             h->mb.b_direct_auto_write = 0;
 127             sh->b_direct_spatial_mv_pred = 1;
 128         }
 129     }
 130     /* else b_direct_spatial_mv_pred was read from the 2pass statsfile */
 131
 132     sh->b_num_ref_idx_override = 0;
 133     sh->i_num_ref_idx_l0_active = 1;
 134     sh->i_num_ref_idx_l1_active = 1;
 135
 136     sh->b_ref_pic_list_reordering_l0 = h->b_ref_reorder[0];
 137     sh->b_ref_pic_list_reordering_l1 = h->b_ref_reorder[1];
 138
 139     /* If the ref list isn't in the default order, construct reordering header */
 140     /* List1 reordering isn't needed yet */
 141     if( sh->b_ref_pic_list_reordering_l0 )
 142     {
 143         int pred_frame_num = i_frame;
 144         for( i = 0; i < h->i_ref0; i++ )
 145         {
 146             int diff = h->fref0[i]->i_frame_num - pred_frame_num;
 147             if( diff == 0 )
 148                 x264_log( h, X264_LOG_ERROR, "diff frame num == 0\n" );
 149             sh->ref_pic_list_order[0][i].idc = ( diff > 0 );
 150             sh->ref_pic_list_order[0][i].arg = abs( diff ) - 1;
 151             pred_frame_num = h->fref0[i]->i_frame_num;
 152         }
 153     }
 154
 155     sh->i_cabac_init_idc = param->i_cabac_init_idc;
 156
 157     sh->i_qp = i_qp;
 158     sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
 159     sh->b_sp_for_swidth = 0;
 160     sh->i_qs_delta = 0;
 161
 162     /* If effective qp <= 15, deblocking would have no effect anyway */
 163     if( param->b_deblocking_filter
 164         && ( h->mb.b_variable_qp
 165         || 15 < i_qp + 2 * X264_MIN(param->i_deblocking_filter_alphac0, param->i_deblocking_filter_beta) ) )
 166     {
 167         sh->i_disable_deblocking_filter_idc = 0;
 168     }
 169     else
 170     {
 171         sh->i_disable_deblocking_filter_idc = 1;
 172     }
 173     sh->i_alpha_c0_offset = param->i_deblocking_filter_alphac0 << 1;
 174     sh->i_beta_offset = param->i_deblocking_filter_beta << 1;
 175 }
 176
 177 static void x264_slice_header_write( bs_t *s, x264_slice_header_t *sh, int i_nal_ref_idc )
 178 {
 179     int i;
 180
 181     if( sh->b_mbaff )
 182     {
 183         assert( sh->i_first_mb % (2*sh->sps->i_mb_width) == 0 );
 184         bs_write_ue( s, sh->i_first_mb >> 1 );
 185     }
 186     else
 187         bs_write_ue( s, sh->i_first_mb );
 188
 189     bs_write_ue( s, sh->i_type + 5 );   /* same type things */
 190     bs_write_ue( s, sh->i_pps_id );
 191     bs_write( s, sh->sps->i_log2_max_frame_num, sh->i_frame_num & ((1<<sh->sps->i_log2_max_frame_num)-1) );
 192
 193     if( !sh->sps->b_frame_mbs_only )
 194     {
 195         bs_write1( s, sh->b_field_pic );
 196         if( sh->b_field_pic )
 197             bs_write1( s, sh->b_bottom_field );
 198     }
 199
 200     if( sh->i_idr_pic_id >= 0 ) /* NAL IDR */
 201     {
 202         bs_write_ue( s, sh->i_idr_pic_id );
 203     }
 204
 205     if( sh->sps->i_poc_type == 0 )
 206     {
 207         bs_write( s, sh->sps->i_log2_max_poc_lsb, sh->i_poc_lsb & ((1<<sh->sps->i_log2_max_poc_lsb)-1) );
 208         if( sh->pps->b_pic_order && !sh->b_field_pic )
 209         {
 210             bs_write_se( s, sh->i_delta_poc_bottom );
 211         }
 212     }
 213     else if( sh->sps->i_poc_type == 1 && !sh->sps->b_delta_pic_order_always_zero )
 214     {
 215         bs_write_se( s, sh->i_delta_poc[0] );
 216         if( sh->pps->b_pic_order && !sh->b_field_pic )
 217         {
 218             bs_write_se( s, sh->i_delta_poc[1] );
 219         }
 220     }
 221
 222     if( sh->pps->b_redundant_pic_cnt )
 223     {
 224         bs_write_ue( s, sh->i_redundant_pic_cnt );
 225     }
 226
 227     if( sh->i_type == SLICE_TYPE_B )
 228     {
 229         bs_write1( s, sh->b_direct_spatial_mv_pred );
 230     }
 231     if( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP || sh->i_type == SLICE_TYPE_B )
 232     {
 233         bs_write1( s, sh->b_num_ref_idx_override );
 234         if( sh->b_num_ref_idx_override )
 235         {
 236             bs_write_ue( s, sh->i_num_ref_idx_l0_active - 1 );
 237             if( sh->i_type == SLICE_TYPE_B )
 238             {
 239                 bs_write_ue( s, sh->i_num_ref_idx_l1_active - 1 );
 240             }
 241         }
 242     }
 243
 244     /* ref pic list reordering */
 245     if( sh->i_type != SLICE_TYPE_I )
 246     {
 247         bs_write1( s, sh->b_ref_pic_list_reordering_l0 );
 248         if( sh->b_ref_pic_list_reordering_l0 )
 249         {
 250             for( i = 0; i < sh->i_num_ref_idx_l0_active; i++ )
 251             {
 252                 bs_write_ue( s, sh->ref_pic_list_order[0][i].idc );
 253                 bs_write_ue( s, sh->ref_pic_list_order[0][i].arg );
 254
 255             }
 256             bs_write_ue( s, 3 );
 257         }
 258     }
 259     if( sh->i_type == SLICE_TYPE_B )
 260     {
 261         bs_write1( s, sh->b_ref_pic_list_reordering_l1 );
 262         if( sh->b_ref_pic_list_reordering_l1 )
 263         {
 264             for( i = 0; i < sh->i_num_ref_idx_l1_active; i++ )
 265             {
 266                 bs_write_ue( s, sh->ref_pic_list_order[1][i].idc );
 267                 bs_write_ue( s, sh->ref_pic_list_order[1][i].arg );
 268             }
 269             bs_write_ue( s, 3 );
 270         }
 271     }
 272
 273     if( sh->pps->b_weighted_pred && ( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP ) )
 274     {
 275         /* pred_weight_table() */
 276         bs_write_ue( s, sh->weight[0][0].i_denom );
 277         bs_write_ue( s, sh->weight[0][1].i_denom );
 278         for( i = 0; i < sh->i_num_ref_idx_l0_active; i++ )
 279         {
 280             int luma_weight_l0_flag = !!sh->weight[i][0].weightfn;
 281             int chroma_weight_l0_flag = !!sh->weight[i][1].weightfn || !!sh->weight[i][2].weightfn;
 282             bs_write1( s, luma_weight_l0_flag );
 283             if( luma_weight_l0_flag )
 284             {
 285                 bs_write_se( s, sh->weight[i][0].i_scale );
 286                 bs_write_se( s, sh->weight[i][0].i_offset );
 287             }
 288             bs_write1( s, chroma_weight_l0_flag );
 289             if( chroma_weight_l0_flag )
 290             {
 291                 int j;
 292                 for( j = 1; j < 3; j++ )
 293                 {
 294                     bs_write_se( s, sh->weight[i][j].i_scale );
 295                     bs_write_se( s, sh->weight[i][j].i_offset );
 296                 }
 297             }
 298         }
 299     }
 300     else if( sh->pps->b_weighted_bipred == 1 && sh->i_type == SLICE_TYPE_B )
 301     {
 302       /* TODO */
 303     }
 304
 305     if( i_nal_ref_idc != 0 )
 306     {
 307         if( sh->i_idr_pic_id >= 0 )
 308         {
 309             bs_write1( s, 0 );  /* no output of prior pics flag */
 310             bs_write1( s, 0 );  /* long term reference flag */
 311         }
 312         else
 313         {
 314             bs_write1( s, sh->i_mmco_command_count > 0 ); /* adaptive_ref_pic_marking_mode_flag */
 315             if( sh->i_mmco_command_count > 0 )
 316             {
 317                 int i;
 318                 for( i = 0; i < sh->i_mmco_command_count; i++ )
 319                 {
 320                     bs_write_ue( s, 1 ); /* mark short term ref as unused */
 321                     bs_write_ue( s, sh->mmco[i].i_difference_of_pic_nums - 1 );
 322                 }
 323                 bs_write_ue( s, 0 ); /* end command list */
 324             }
 325         }
 326     }
 327
 328     if( sh->pps->b_cabac && sh->i_type != SLICE_TYPE_I )
 329     {
 330         bs_write_ue( s, sh->i_cabac_init_idc );
 331     }
 332     bs_write_se( s, sh->i_qp_delta );      /* slice qp delta */
 333
 334     if( sh->pps->b_deblocking_filter_control )
 335     {
 336         bs_write_ue( s, sh->i_disable_deblocking_filter_idc );
 337         if( sh->i_disable_deblocking_filter_idc != 1 )
 338         {
 339             bs_write_se( s, sh->i_alpha_c0_offset >> 1 );
 340             bs_write_se( s, sh->i_beta_offset >> 1 );
 341         }
 342     }
 343 }
 344
 345 /* If we are within a reasonable distance of the end of the memory allocated for the bitstream, */
 346 /* reallocate, adding an arbitrary amount of space (100 kilobytes). */
 347 static int x264_bitstream_check_buffer( x264_t *h )
 348 {
 349     uint8_t *bs_bak = h->out.p_bitstream;
 350     if( ( h->param.b_cabac && (h->cabac.p_end - h->cabac.p < 2500) )
 351      || ( h->out.bs.p_end - h->out.bs.p < 2500 ) )
 352     {
 353         intptr_t delta;
 354         int i;
 355
 356         h->out.i_bitstream += 100000;
 357         CHECKED_MALLOC( h->out.p_bitstream, h->out.i_bitstream );
 358         h->mc.memcpy_aligned( h->out.p_bitstream, bs_bak, (h->out.i_bitstream - 100000) & ~15 );
 359         delta = h->out.p_bitstream - bs_bak;
 360
 361         h->out.bs.p_start += delta;
 362         h->out.bs.p += delta;
 363         h->out.bs.p_end = h->out.p_bitstream + h->out.i_bitstream;
 364
 365         h->cabac.p_start += delta;
 366         h->cabac.p += delta;
 367         h->cabac.p_end = h->out.p_bitstream + h->out.i_bitstream;
 368
 369         for( i = 0; i <= h->out.i_nal; i++ )
 370             h->out.nal[i].p_payload += delta;
 371         x264_free( bs_bak );
 372     }
 373     return 0;
 374 fail:
 375     x264_free( bs_bak );
 376     return -1;
 377 }
 378
 379 /****************************************************************************
 380  *
 381  ****************************************************************************
 382  ****************************** External API*********************************
 383  ****************************************************************************
 384  *
 385  ****************************************************************************/
 386
 387 static int x264_validate_parameters( x264_t *h )
 388 {
 389 #ifdef HAVE_MMX
 390     if( !(x264_cpu_detect() & X264_CPU_SSE) )
 391     {
 392         x264_log( h, X264_LOG_ERROR, "your cpu does not support SSE1, but x264 was compiled with asm support\n");
 393         x264_log( h, X264_LOG_ERROR, "to run x264, recompile without asm support (configure --disable-asm)\n");
 394         return -1;
 395     }
 396 #endif
 397     if( h->param.i_width <= 0 || h->param.i_height <= 0 )
 398     {
 399         x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
 400                   h->param.i_width, h->param.i_height );
 401         return -1;
 402     }
 403
 404     if( h->param.i_width % 2 || h->param.i_height % 2 )
 405     {
 406         x264_log( h, X264_LOG_ERROR, "width or height not divisible by 2 (%dx%d)\n",
 407                   h->param.i_width, h->param.i_height );
 408         return -1;
 409     }
 410     int i_csp = h->param.i_csp & X264_CSP_MASK;
 411     if( i_csp != X264_CSP_I420 && i_csp != X264_CSP_YV12 )
 412     {
 413         x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420/YV12 supported)\n" );
 414         return -1;
 415     }
 416
 417     if( h->param.i_threads == X264_THREADS_AUTO )
 418         h->param.i_threads = x264_cpu_num_processors() * (h->param.b_sliced_threads?2:3)/2;
 419     h->param.i_threads = x264_clip3( h->param.i_threads, 1, X264_THREAD_MAX );
 420     if( h->param.i_threads > 1 )
 421     {
 422 #ifndef HAVE_PTHREAD
 423         x264_log( h, X264_LOG_WARNING, "not compiled with pthread support!\n");
 424         h->param.i_threads = 1;
 425 #endif
 426         /* Avoid absurdly small thread slices as they can reduce performance
 427          * and VBV compliance.  Capped at an arbitrary 4 rows per thread. */
 428         if( h->param.b_sliced_threads )
 429         {
 430             int max_threads = (h->param.i_height+15)/16 / 4;
 431             h->param.i_threads = X264_MIN( h->param.i_threads, max_threads );
 432         }
 433     }
 434     else
 435         h->param.b_sliced_threads = 0;
 436     h->i_thread_frames = h->param.b_sliced_threads ? 1 : h->param.i_threads;
 437
 438     if( h->param.b_interlaced )
 439     {
 440         if( h->param.analyse.i_me_method >= X264_ME_ESA )
 441         {
 442             x264_log( h, X264_LOG_WARNING, "interlace + me=esa is not implemented\n" );
 443             h->param.analyse.i_me_method = X264_ME_UMH;
 444         }
 445         if( h->param.analyse.i_weighted_pred > 0 )
 446         {
 447             x264_log( h, X264_LOG_WARNING, "interlace + weightp is not implemented\n" );
 448             h->param.analyse.i_weighted_pred = X264_WEIGHTP_NONE;
 449         }
 450     }
 451
 452     /* Detect default ffmpeg settings and terminate with an error. */
 453     {
 454         int score = 0;
 455         score += h->param.analyse.i_me_range == 0;
 456         score += h->param.rc.i_qp_step == 3;
 457         score += h->param.i_keyint_max == 12;
 458         score += h->param.rc.i_qp_min == 2;
 459         score += h->param.rc.i_qp_max == 31;
 460         score += h->param.rc.f_qcompress == 0.5;
 461         score += fabs(h->param.rc.f_ip_factor - 1.25) < 0.01;
 462         score += fabs(h->param.rc.f_pb_factor - 1.25) < 0.01;
 463         score += h->param.analyse.inter == 0 && h->param.analyse.i_subpel_refine == 8;
 464         if( score >= 5 )
 465         {
 466             x264_log( h, X264_LOG_ERROR, "broken ffmpeg default settings detected\n" );
 467             x264_log( h, X264_LOG_ERROR, "use an encoding preset (vpre)\n" );
 468             return -1;
 469         }
 470     }
 471
 472     if( h->param.rc.i_rc_method < 0 || h->param.rc.i_rc_method > 2 )
 473     {
 474         x264_log( h, X264_LOG_ERROR, "no ratecontrol method specified\n" );
 475         return -1;
 476     }
 477     h->param.rc.f_rf_constant = x264_clip3f( h->param.rc.f_rf_constant, 0, 51 );
 478     h->param.rc.i_qp_constant = x264_clip3( h->param.rc.i_qp_constant, 0, 51 );
 479     if( h->param.rc.i_rc_method == X264_RC_CRF )
 480     {
 481         h->param.rc.i_qp_constant = h->param.rc.f_rf_constant;
 482         h->param.rc.i_bitrate = 0;
 483     }
 484     if( (h->param.rc.i_rc_method == X264_RC_CQP || h->param.rc.i_rc_method == X264_RC_CRF)
 485         && h->param.rc.i_qp_constant == 0 )
 486     {
 487         h->mb.b_lossless = 1;
 488         h->param.i_cqm_preset = X264_CQM_FLAT;
 489         h->param.psz_cqm_file = NULL;
 490         h->param.rc.i_rc_method = X264_RC_CQP;
 491         h->param.rc.f_ip_factor = 1;
 492         h->param.rc.f_pb_factor = 1;
 493         h->param.analyse.b_psnr = 0;
 494         h->param.analyse.b_ssim = 0;
 495         h->param.analyse.i_chroma_qp_offset = 0;
 496         h->param.analyse.i_trellis = 0;
 497         h->param.analyse.b_fast_pskip = 0;
 498         h->param.analyse.i_noise_reduction = 0;
 499         h->param.analyse.f_psy_rd = 0;
 500         h->param.i_bframe = 0;
 501         /* 8x8dct is not useful at all in CAVLC lossless */
 502         if( !h->param.b_cabac )
 503             h->param.analyse.b_transform_8x8 = 0;
 504     }
 505     if( h->param.rc.i_rc_method == X264_RC_CQP )
 506     {
 507         float qp_p = h->param.rc.i_qp_constant;
 508         float qp_i = qp_p - 6*log(h->param.rc.f_ip_factor)/log(2);
 509         float qp_b = qp_p + 6*log(h->param.rc.f_pb_factor)/log(2);
 510         h->param.rc.i_qp_min = x264_clip3( (int)(X264_MIN3( qp_p, qp_i, qp_b )), 0, 51 );
 511         h->param.rc.i_qp_max = x264_clip3( (int)(X264_MAX3( qp_p, qp_i, qp_b ) + .999), 0, 51 );
 512         h->param.rc.i_aq_mode = 0;
 513         h->param.rc.b_mb_tree = 0;
 514     }
 515     h->param.rc.i_qp_max = x264_clip3( h->param.rc.i_qp_max, 0, 51 );
 516     h->param.rc.i_qp_min = x264_clip3( h->param.rc.i_qp_min, 0, h->param.rc.i_qp_max );
 517     if( h->param.rc.i_vbv_buffer_size )
 518     {
 519         if( h->param.rc.i_rc_method == X264_RC_CQP )
 520         {
 521             x264_log( h, X264_LOG_WARNING, "VBV is incompatible with constant QP, ignored.\n" );
 522             h->param.rc.i_vbv_max_bitrate = 0;
 523             h->param.rc.i_vbv_buffer_size = 0;
 524         }
 525         else if( h->param.rc.i_vbv_max_bitrate == 0 )
 526         {
 527             if( h->param.rc.i_rc_method == X264_RC_ABR )
 528             {
 529                 x264_log( h, X264_LOG_WARNING, "VBV maxrate unspecified, assuming CBR\n" );
 530                 h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate;
 531             }
 532             else
 533             {
 534                 x264_log( h, X264_LOG_WARNING, "VBV bufsize set but maxrate unspecified, ignored\n" );
 535                 h->param.rc.i_vbv_buffer_size = 0;
 536             }
 537         }
 538         else if( h->param.rc.i_vbv_max_bitrate < h->param.rc.i_bitrate &&
 539                  h->param.rc.i_rc_method == X264_RC_ABR )
 540         {
 541             x264_log( h, X264_LOG_WARNING, "max bitrate less than average bitrate, assuming CBR\n" );
 542             h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate;
 543         }
 544     }
 545     else if( h->param.rc.i_vbv_max_bitrate )
 546     {
 547         x264_log( h, X264_LOG_WARNING, "VBV maxrate specified, but no bufsize, ignored\n" );
 548         h->param.rc.i_vbv_max_bitrate = 0;
 549     }
 550
 551     int max_slices = (h->param.i_height+((16<<h->param.b_interlaced)-1))/(16<<h->param.b_interlaced);
 552     if( h->param.b_sliced_threads )
 553         h->param.i_slice_count = x264_clip3( h->param.i_threads, 0, max_slices );
 554     else
 555     {
 556         h->param.i_slice_count = x264_clip3( h->param.i_slice_count, 0, max_slices );
 557         h->param.i_slice_max_size = X264_MAX( h->param.i_slice_max_size, 0 );
 558         h->param.i_slice_max_mbs = X264_MAX( h->param.i_slice_max_mbs, 0 );
 559         if( h->param.b_interlaced && h->param.i_slice_max_size )
 560         {
 561             x264_log( h, X264_LOG_WARNING, "interlaced + slice-max-size is not implemented\n" );
 562             h->param.i_slice_max_size = 0;
 563         }
 564         if( h->param.b_interlaced && h->param.i_slice_max_mbs )
 565         {
 566             x264_log( h, X264_LOG_WARNING, "interlaced + slice-max-mbs is not implemented\n" );
 567             h->param.i_slice_max_mbs = 0;
 568         }
 569         if( h->param.i_slice_max_mbs || h->param.i_slice_max_size )
 570             h->param.i_slice_count = 0;
 571     }
 572
 573     h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
 574     if( h->param.i_keyint_max <= 0 )
 575         h->param.i_keyint_max = 1;
 576     if( h->param.i_scenecut_threshold < 0 )
 577         h->param.i_scenecut_threshold = 0;
 578     if( !h->param.analyse.i_subpel_refine && h->param.analyse.i_direct_mv_pred > X264_DIRECT_PRED_SPATIAL )
 579     {
 580         x264_log( h, X264_LOG_WARNING, "subme=0 + direct=temporal is not supported\n" );
 581         h->param.analyse.i_direct_mv_pred = X264_DIRECT_PRED_SPATIAL;
 582     }
 583     h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
 584     if( h->param.i_keyint_max == 1 )
 585     {
 586         h->param.i_bframe = 0;
 587         h->param.b_intra_refresh = 0;
 588     }
 589     h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
 590     if( h->param.i_bframe <= 1 )
 591         h->param.i_bframe_pyramid = X264_B_PYRAMID_NONE;
 592     h->param.i_bframe_pyramid = x264_clip3( h->param.i_bframe_pyramid, X264_B_PYRAMID_NONE, X264_B_PYRAMID_NORMAL );
 593     if( !h->param.i_bframe )
 594     {
 595         h->param.i_bframe_adaptive = X264_B_ADAPT_NONE;
 596         h->param.analyse.i_direct_mv_pred = 0;
 597         h->param.analyse.b_weighted_bipred = 0;
 598     }
 599     if( h->param.b_intra_refresh && h->param.i_bframe_pyramid == X264_B_PYRAMID_NORMAL )
 600     {
 601         x264_log( h, X264_LOG_WARNING, "b-pyramid normal + intra-refresh is not supported\n" );
 602         h->param.i_bframe_pyramid = X264_B_PYRAMID_STRICT;
 603     }
 604     if( h->param.b_intra_refresh && h->param.i_frame_reference > 1 )
 605     {
 606         x264_log( h, X264_LOG_WARNING, "ref > 1 + intra-refresh is not supported\n" );
 607         h->param.i_frame_reference = 1;
 608     }
 609     h->param.i_keyint_min = x264_clip3( h->param.i_keyint_min, 1, h->param.i_keyint_max/2+1 );
 610     h->param.rc.i_lookahead = x264_clip3( h->param.rc.i_lookahead, 0, X264_LOOKAHEAD_MAX );
 611     {
 612         int maxrate = X264_MAX( h->param.rc.i_vbv_max_bitrate, h->param.rc.i_bitrate );
 613         float bufsize = maxrate ? (float)h->param.rc.i_vbv_buffer_size / maxrate : 0;
 614         float fps = h->param.i_fps_num > 0 && h->param.i_fps_den > 0 ? (float) h->param.i_fps_num / h->param.i_fps_den : 25.0;
 615         h->param.rc.i_lookahead = X264_MIN( h->param.rc.i_lookahead, X264_MAX( h->param.i_keyint_max, bufsize*fps ) );
 616     }
 617
 618     if( !h->param.i_timebase_num || !h->param.i_timebase_den )
 619     {
 620         h->param.i_timebase_num = h->param.i_fps_den;
 621         h->param.i_timebase_den = h->param.i_fps_num;
 622     }
 623
 624     h->param.rc.f_qcompress = x264_clip3f( h->param.rc.f_qcompress, 0.0, 1.0 );
 625     if( !h->param.rc.i_lookahead || h->param.i_keyint_max == 1 || h->param.rc.f_qcompress == 1 )
 626         h->param.rc.b_mb_tree = 0;
 627     if( h->param.rc.b_stat_read )
 628         h->param.rc.i_lookahead = 0;
 629 #ifdef HAVE_PTHREAD
 630     if( h->param.i_sync_lookahead )
 631         h->param.i_sync_lookahead = x264_clip3( h->param.i_sync_lookahead, h->i_thread_frames + h->param.i_bframe, X264_LOOKAHEAD_MAX );
 632     if( h->param.rc.b_stat_read || h->i_thread_frames == 1 )
 633         h->param.i_sync_lookahead = 0;
 634 #else
 635     h->param.i_sync_lookahead = 0;
 636 #endif
 637
 638     h->param.i_deblocking_filter_alphac0 = x264_clip3( h->param.i_deblocking_filter_alphac0, -6, 6 );
 639     h->param.i_deblocking_filter_beta    = x264_clip3( h->param.i_deblocking_filter_beta, -6, 6 );
 640     h->param.analyse.i_luma_deadzone[0] = x264_clip3( h->param.analyse.i_luma_deadzone[0], 0, 32 );
 641     h->param.analyse.i_luma_deadzone[1] = x264_clip3( h->param.analyse.i_luma_deadzone[1], 0, 32 );
 642
 643     h->param.i_cabac_init_idc = x264_clip3( h->param.i_cabac_init_idc, 0, 2 );
 644
 645     if( h->param.i_cqm_preset < X264_CQM_FLAT || h->param.i_cqm_preset > X264_CQM_CUSTOM )
 646         h->param.i_cqm_preset = X264_CQM_FLAT;
 647
 648     if( h->param.analyse.i_me_method < X264_ME_DIA ||
 649         h->param.analyse.i_me_method > X264_ME_TESA )
 650         h->param.analyse.i_me_method = X264_ME_HEX;
 651     if( h->param.analyse.i_me_range < 4 )
 652         h->param.analyse.i_me_range = 4;
 653     if( h->param.analyse.i_me_range > 16 && h->param.analyse.i_me_method <= X264_ME_HEX )
 654         h->param.analyse.i_me_range = 16;
 655     if( h->param.analyse.i_me_method == X264_ME_TESA &&
 656         (h->mb.b_lossless || h->param.analyse.i_subpel_refine <= 1) )
 657         h->param.analyse.i_me_method = X264_ME_ESA;
 658     h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 0, 10 );
 659     h->param.analyse.b_mixed_references = h->param.analyse.b_mixed_references && h->param.i_frame_reference > 1;
 660     h->param.analyse.inter &= X264_ANALYSE_PSUB16x16|X264_ANALYSE_PSUB8x8|X264_ANALYSE_BSUB16x16|
 661                               X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
 662     h->param.analyse.intra &= X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
 663     if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
 664         h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
 665     if( !h->param.analyse.b_transform_8x8 )
 666     {
 667         h->param.analyse.inter &= ~X264_ANALYSE_I8x8;
 668         h->param.analyse.intra &= ~X264_ANALYSE_I8x8;
 669     }
 670     h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
 671     if( !h->param.b_cabac )
 672         h->param.analyse.i_trellis = 0;
 673     h->param.analyse.i_trellis = x264_clip3( h->param.analyse.i_trellis, 0, 2 );
 674     if( !h->param.analyse.b_psy )
 675     {
 676         h->param.analyse.f_psy_rd = 0;
 677         h->param.analyse.f_psy_trellis = 0;
 678     }
 679     if( !h->param.analyse.i_trellis )
 680         h->param.analyse.f_psy_trellis = 0;
 681     h->param.analyse.f_psy_rd = x264_clip3f( h->param.analyse.f_psy_rd, 0, 10 );
 682     h->param.analyse.f_psy_trellis = x264_clip3f( h->param.analyse.f_psy_trellis, 0, 10 );
 683     if( h->param.analyse.i_subpel_refine < 6 )
 684         h->param.analyse.f_psy_rd = 0;
 685     h->mb.i_psy_rd = FIX8( h->param.analyse.f_psy_rd );
 686     /* Psy RDO increases overall quantizers to improve the quality of luma--this indirectly hurts chroma quality */
 687     /* so we lower the chroma QP offset to compensate */
 688     /* This can be triggered repeatedly on multiple calls to parameter_validate, but since encoding
 689      * uses the pps chroma qp offset not the param chroma qp offset, this is not a problem. */
 690     if( h->mb.i_psy_rd )
 691         h->param.analyse.i_chroma_qp_offset -= h->param.analyse.f_psy_rd < 0.25 ? 1 : 2;
 692     h->mb.i_psy_trellis = FIX8( h->param.analyse.f_psy_trellis / 4 );
 693     /* Psy trellis has a similar effect. */
 694     if( h->mb.i_psy_trellis )
 695         h->param.analyse.i_chroma_qp_offset -= h->param.analyse.f_psy_trellis < 0.25 ? 1 : 2;
 696     h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
 697     h->param.rc.i_aq_mode = x264_clip3( h->param.rc.i_aq_mode, 0, 2 );
 698     h->param.rc.f_aq_strength = x264_clip3f( h->param.rc.f_aq_strength, 0, 3 );
 699     if( h->param.rc.f_aq_strength == 0 )
 700         h->param.rc.i_aq_mode = 0;
 701     /* MB-tree requires AQ to be on, even if the strength is zero. */
 702     if( !h->param.rc.i_aq_mode && h->param.rc.b_mb_tree )
 703     {
 704         h->param.rc.i_aq_mode = 1;
 705         h->param.rc.f_aq_strength = 0;
 706     }
 707     h->param.analyse.i_noise_reduction = x264_clip3( h->param.analyse.i_noise_reduction, 0, 1<<16 );
 708     if( h->param.analyse.i_subpel_refine == 10 && (h->param.analyse.i_trellis != 2 || !h->param.rc.i_aq_mode) )
 709         h->param.analyse.i_subpel_refine = 9;
 710
 711     {
 712         const x264_level_t *l = x264_levels;
 713         if( h->param.i_level_idc < 0 )
 714         {
 715             int maxrate_bak = h->param.rc.i_vbv_max_bitrate;
 716             if( h->param.rc.i_rc_method == X264_RC_ABR && h->param.rc.i_vbv_buffer_size <= 0 )
 717                 h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate * 2;
 718             h->sps = h->sps_array;
 719             x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
 720             do h->param.i_level_idc = l->level_idc;
 721                 while( l[1].level_idc && x264_validate_levels( h, 0 ) && l++ );
 722             h->param.rc.i_vbv_max_bitrate = maxrate_bak;
 723         }
 724         else
 725         {
 726             while( l->level_idc && l->level_idc != h->param.i_level_idc )
 727                 l++;
 728             if( l->level_idc == 0 )
 729             {
 730                 x264_log( h, X264_LOG_ERROR, "invalid level_idc: %d\n", h->param.i_level_idc );
 731                 return -1;
 732             }
 733         }
 734         if( h->param.analyse.i_mv_range <= 0 )
 735             h->param.analyse.i_mv_range = l->mv_range >> h->param.b_interlaced;
 736         else
 737             h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 512 >> h->param.b_interlaced);
 738     }
 739
 740     h->param.analyse.i_weighted_pred = x264_clip3( h->param.analyse.i_weighted_pred, 0, X264_WEIGHTP_SMART );
 741     if( !h->param.analyse.i_weighted_pred && h->param.rc.b_mb_tree && h->param.analyse.b_psy && !h->param.b_interlaced )
 742         h->param.analyse.i_weighted_pred = X264_WEIGHTP_FAKE;
 743
 744     if( h->i_thread_frames > 1 )
 745     {
 746         int r = h->param.analyse.i_mv_range_thread;
 747         int r2;
 748         if( r <= 0 )
 749         {
 750             // half of the available space is reserved and divided evenly among the threads,
 751             // the rest is allocated to whichever thread is far enough ahead to use it.
 752             // reserving more space increases quality for some videos, but costs more time
 753             // in thread synchronization.
 754             int max_range = (h->param.i_height + X264_THREAD_HEIGHT) / h->i_thread_frames - X264_THREAD_HEIGHT;
 755             r = max_range / 2;
 756         }
 757         r = X264_MAX( r, h->param.analyse.i_me_range );
 758         r = X264_MIN( r, h->param.analyse.i_mv_range );
 759         // round up to use the whole mb row
 760         r2 = (r & ~15) + ((-X264_THREAD_HEIGHT) & 15);
 761         if( r2 < r )
 762             r2 += 16;
 763         x264_log( h, X264_LOG_DEBUG, "using mv_range_thread = %d\n", r2 );
 764         h->param.analyse.i_mv_range_thread = r2;
 765     }
 766
 767     if( h->param.rc.f_qblur < 0 )
 768         h->param.rc.f_qblur = 0;
 769     if( h->param.rc.f_complexity_blur < 0 )
 770         h->param.rc.f_complexity_blur = 0;
 771
 772     h->param.i_sps_id &= 31;
 773
 774     if( h->param.i_log_level < X264_LOG_INFO )
 775     {
 776         h->param.analyse.b_psnr = 0;
 777         h->param.analyse.b_ssim = 0;
 778     }
 779
 780     /* ensure the booleans are 0 or 1 so they can be used in math */
 781 #define BOOLIFY(x) h->param.x = !!h->param.x
 782     BOOLIFY( b_cabac );
 783     BOOLIFY( b_constrained_intra );
 784     BOOLIFY( b_deblocking_filter );
 785     BOOLIFY( b_deterministic );
 786     BOOLIFY( b_sliced_threads );
 787     BOOLIFY( b_interlaced );
 788     BOOLIFY( b_intra_refresh );
 789     BOOLIFY( b_visualize );
 790     BOOLIFY( b_aud );
 791     BOOLIFY( b_repeat_headers );
 792     BOOLIFY( b_annexb );
 793     BOOLIFY( analyse.b_transform_8x8 );
 794     BOOLIFY( analyse.b_weighted_bipred );
 795     BOOLIFY( analyse.b_chroma_me );
 796     BOOLIFY( analyse.b_mixed_references );
 797     BOOLIFY( analyse.b_fast_pskip );
 798     BOOLIFY( analyse.b_dct_decimate );
 799     BOOLIFY( analyse.b_psy );
 800     BOOLIFY( analyse.b_psnr );
 801     BOOLIFY( analyse.b_ssim );
 802     BOOLIFY( rc.b_stat_write );
 803     BOOLIFY( rc.b_stat_read );
 804     BOOLIFY( rc.b_mb_tree );
 805 #undef BOOLIFY
 806
 807     return 0;
 808 }
 809
 810 static void mbcmp_init( x264_t *h )
 811 {
 812     int satd = !h->mb.b_lossless && h->param.analyse.i_subpel_refine > 1;
 813     memcpy( h->pixf.mbcmp, satd ? h->pixf.satd : h->pixf.sad_aligned, sizeof(h->pixf.mbcmp) );
 814     memcpy( h->pixf.mbcmp_unaligned, satd ? h->pixf.satd : h->pixf.sad, sizeof(h->pixf.mbcmp_unaligned) );
 815     h->pixf.intra_mbcmp_x3_16x16 = satd ? h->pixf.intra_satd_x3_16x16 : h->pixf.intra_sad_x3_16x16;
 816     h->pixf.intra_mbcmp_x3_8x8c = satd ? h->pixf.intra_satd_x3_8x8c : h->pixf.intra_sad_x3_8x8c;
 817     h->pixf.intra_mbcmp_x3_4x4 = satd ? h->pixf.intra_satd_x3_4x4 : h->pixf.intra_sad_x3_4x4;
 818     satd &= h->param.analyse.i_me_method == X264_ME_TESA;
 819     memcpy( h->pixf.fpelcmp, satd ? h->pixf.satd : h->pixf.sad, sizeof(h->pixf.fpelcmp) );
 820     memcpy( h->pixf.fpelcmp_x3, satd ? h->pixf.satd_x3 : h->pixf.sad_x3, sizeof(h->pixf.fpelcmp_x3) );
 821     memcpy( h->pixf.fpelcmp_x4, satd ? h->pixf.satd_x4 : h->pixf.sad_x4, sizeof(h->pixf.fpelcmp_x4) );
 822 }
 823
 824 static void x264_set_aspect_ratio( x264_t *h, x264_param_t *param, int initial )
 825 {
 826     /* VUI */
 827     if( param->vui.i_sar_width > 0 && param->vui.i_sar_height > 0 )
 828     {
 829         int i_w = param->vui.i_sar_width;
 830         int i_h = param->vui.i_sar_height;
 831         int old_w = h->param.vui.i_sar_width;
 832         int old_h = h->param.vui.i_sar_height;
 833
 834         x264_reduce_fraction( &i_w, &i_h );
 835
 836         while( i_w > 65535 || i_h > 65535 )
 837         {
 838             i_w /= 2;
 839             i_h /= 2;
 840         }
 841
 842         x264_reduce_fraction( &i_w, &i_h );
 843
 844         if( i_w != old_w || i_h != old_h || initial )
 845         {
 846             h->param.vui.i_sar_width = 0;
 847             h->param.vui.i_sar_height = 0;
 848             if( i_w == 0 || i_h == 0 )
 849                 x264_log( h, X264_LOG_WARNING, "cannot create valid sample aspect ratio\n" );
 850             else
 851             {
 852                 x264_log( h, initial?X264_LOG_INFO:X264_LOG_DEBUG, "using SAR=%d/%d\n", i_w, i_h );
 853                 h->param.vui.i_sar_width = i_w;
 854                 h->param.vui.i_sar_height = i_h;
 855             }
 856         }
 857     }
 858 }
 859
 860 /****************************************************************************
 861  * x264_encoder_open:
 862  ****************************************************************************/
 863 x264_t *x264_encoder_open( x264_param_t *param )
 864 {
 865     x264_t *h;
 866     char buf[1000], *p;
 867     int i, qp, i_slicetype_length;
 868
 869     CHECKED_MALLOCZERO( h, sizeof(x264_t) );
 870
 871     /* Create a copy of param */
 872     memcpy( &h->param, param, sizeof(x264_param_t) );
 873
 874     if( param->param_free )
 875         param->param_free( param );
 876
 877     if( x264_validate_parameters( h ) < 0 )
 878         goto fail;
 879
 880     if( h->param.psz_cqm_file )
 881         if( x264_cqm_parse_file( h, h->param.psz_cqm_file ) < 0 )
 882             goto fail;
 883
 884     if( h->param.rc.psz_stat_out )
 885         h->param.rc.psz_stat_out = strdup( h->param.rc.psz_stat_out );
 886     if( h->param.rc.psz_stat_in )
 887         h->param.rc.psz_stat_in = strdup( h->param.rc.psz_stat_in );
 888
 889     x264_set_aspect_ratio( h, &h->param, 1 );
 890
 891     x264_reduce_fraction( &h->param.i_fps_num, &h->param.i_fps_den );
 892     x264_reduce_fraction( &h->param.i_timebase_num, &h->param.i_timebase_den );
 893
 894     /* Init x264_t */
 895     h->i_frame = -1;
 896     h->i_frame_num = 0;
 897     h->i_idr_pic_id = 0;
 898     if( h->param.b_dts_compress )
 899     {
 900         /* h->i_dts_compress_multiplier == h->frames.i_bframe_delay + 1 */
 901         h->i_dts_compress_multiplier = h->param.i_bframe ? (h->param.i_bframe_pyramid ? 3 : 2) : 1;
 902         if( h->i_dts_compress_multiplier != 1 )
 903             x264_log( h, X264_LOG_DEBUG, "DTS compresion changed timebase: %d/%d -> %d/%d\n",
 904                       h->param.i_timebase_num, h->param.i_timebase_den,
 905                       h->param.i_timebase_num, h->param.i_timebase_den * h->i_dts_compress_multiplier );
 906         h->param.i_timebase_den *= h->i_dts_compress_multiplier;
 907     }
 908     else
 909         h->i_dts_compress_multiplier = 1;
 910
 911     h->sps = &h->sps_array[0];
 912     x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
 913
 914     h->pps = &h->pps_array[0];
 915     x264_pps_init( h->pps, h->param.i_sps_id, &h->param, h->sps );
 916
 917     x264_validate_levels( h, 1 );
 918
 919     h->chroma_qp_table = i_chroma_qp_table + 12 + h->pps->i_chroma_qp_index_offset;
 920
 921     if( x264_cqm_init( h ) < 0 )
 922         goto fail;
 923
 924     h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
 925
 926     /* Init frames. */
 927     if( h->param.i_bframe_adaptive == X264_B_ADAPT_TRELLIS )
 928         h->frames.i_delay = X264_MAX(h->param.i_bframe,3)*4;
 929     else
 930         h->frames.i_delay = h->param.i_bframe;
 931     if( h->param.rc.b_mb_tree || h->param.rc.i_vbv_buffer_size )
 932         h->frames.i_delay = X264_MAX( h->frames.i_delay, h->param.rc.i_lookahead );
 933     i_slicetype_length = h->frames.i_delay;
 934     h->frames.i_delay += h->i_thread_frames - 1;
 935     h->frames.i_delay = X264_MIN( h->frames.i_delay, X264_LOOKAHEAD_MAX );
 936     h->frames.i_delay += h->param.i_sync_lookahead;
 937     h->frames.i_bframe_delay = h->param.i_bframe ? (h->param.i_bframe_pyramid ? 2 : 1) : 0;
 938
 939     h->frames.i_max_ref0 = h->param.i_frame_reference;
 940     h->frames.i_max_ref1 = h->sps->vui.i_num_reorder_frames;
 941     h->frames.i_max_dpb  = h->sps->vui.i_max_dec_frame_buffering;
 942     h->frames.b_have_lowres = !h->param.rc.b_stat_read
 943         && ( h->param.rc.i_rc_method == X264_RC_ABR
 944           || h->param.rc.i_rc_method == X264_RC_CRF
 945           || h->param.i_bframe_adaptive
 946           || h->param.i_scenecut_threshold
 947           || h->param.rc.b_mb_tree
 948           || h->param.analyse.i_weighted_pred == X264_WEIGHTP_SMART );
 949     h->frames.b_have_lowres |= h->param.rc.b_stat_read && h->param.rc.i_vbv_buffer_size > 0;
 950     h->frames.b_have_sub8x8_esa = !!(h->param.analyse.inter & X264_ANALYSE_PSUB8x8);
 951
 952     h->frames.i_last_keyframe = - h->param.i_keyint_max;
 953     h->frames.i_input    = 0;
 954
 955     CHECKED_MALLOCZERO( h->frames.unused[0], (h->frames.i_delay + 3) * sizeof(x264_frame_t *) );
 956     /* Allocate room for max refs plus a few extra just in case. */
 957     CHECKED_MALLOCZERO( h->frames.unused[1], (h->i_thread_frames + 20) * sizeof(x264_frame_t *) );
 958     CHECKED_MALLOCZERO( h->frames.current, (h->param.i_sync_lookahead + h->param.i_bframe
 959                         + h->i_thread_frames + 3) * sizeof(x264_frame_t *) );
 960     if( h->param.analyse.i_weighted_pred > 0 )
 961         CHECKED_MALLOCZERO( h->frames.blank_unused, h->i_thread_frames * 4 * sizeof(x264_frame_t *) );
 962     h->i_ref0 = 0;
 963     h->i_ref1 = 0;
 964
 965     x264_rdo_init();
 966
 967     /* init CPU functions */
 968     x264_predict_16x16_init( h->param.cpu, h->predict_16x16 );
 969     x264_predict_8x8c_init( h->param.cpu, h->predict_8x8c );
 970     x264_predict_8x8_init( h->param.cpu, h->predict_8x8, &h->predict_8x8_filter );
 971     x264_predict_4x4_init( h->param.cpu, h->predict_4x4 );
 972     if( !h->param.b_cabac )
 973         x264_init_vlc_tables();
 974     x264_pixel_init( h->param.cpu, &h->pixf );
 975     x264_dct_init( h->param.cpu, &h->dctf );
 976     x264_zigzag_init( h->param.cpu, &h->zigzagf, h->param.b_interlaced );
 977     x264_mc_init( h->param.cpu, &h->mc );
 978     x264_quant_init( h, h->param.cpu, &h->quantf );
 979     x264_deblock_init( h->param.cpu, &h->loopf );
 980     x264_dct_init_weights();
 981
 982     mbcmp_init( h );
 983
 984     p = buf + sprintf( buf, "using cpu capabilities:" );
 985     for( i=0; x264_cpu_names[i].flags; i++ )
 986     {
 987         if( !strcmp(x264_cpu_names[i].name, "SSE2")
 988             && h->param.cpu & (X264_CPU_SSE2_IS_FAST|X264_CPU_SSE2_IS_SLOW) )
 989             continue;
 990         if( !strcmp(x264_cpu_names[i].name, "SSE3")
 991             && (h->param.cpu & X264_CPU_SSSE3 || !(h->param.cpu & X264_CPU_CACHELINE_64)) )
 992             continue;
 993         if( !strcmp(x264_cpu_names[i].name, "SSE4.1")
 994             && (h->param.cpu & X264_CPU_SSE42) )
 995             continue;
 996         if( (h->param.cpu & x264_cpu_names[i].flags) == x264_cpu_names[i].flags
 997             && (!i || x264_cpu_names[i].flags != x264_cpu_names[i-1].flags) )
 998             p += sprintf( p, " %s", x264_cpu_names[i].name );
 999     }
1000     if( !h->param.cpu )
1001         p += sprintf( p, " none!" );
1002     x264_log( h, X264_LOG_INFO, "%s\n", buf );
1003
1004     for( qp = h->param.rc.i_qp_min; qp <= h->param.rc.i_qp_max; qp++ )
1005         if( x264_analyse_init_costs( h, qp ) )
1006             goto fail;
1007     if( x264_analyse_init_costs( h, X264_LOOKAHEAD_QP ) )
1008         goto fail;
1009     if( h->cost_mv[1][2013] != 24 )
1010     {
1011         x264_log( h, X264_LOG_ERROR, "MV cost test failed: x264 has been miscompiled!\n" );
1012         goto fail;
1013     }
1014
1015     h->out.i_nal = 0;
1016     h->out.i_bitstream = X264_MAX( 1000000, h->param.i_width * h->param.i_height * 4
1017         * ( h->param.rc.i_rc_method == X264_RC_ABR ? pow( 0.95, h->param.rc.i_qp_min )
1018           : pow( 0.95, h->param.rc.i_qp_constant ) * X264_MAX( 1, h->param.rc.f_ip_factor )));
1019
1020     CHECKED_MALLOC( h->nal_buffer, h->out.i_bitstream * 3/2 + 4 );
1021     h->nal_buffer_size = h->out.i_bitstream * 3/2 + 4;
1022
1023     h->thread[0] = h;
1024     for( i = 1; i < h->param.i_threads + !!h->param.i_sync_lookahead; i++ )
1025         CHECKED_MALLOC( h->thread[i], sizeof(x264_t) );
1026
1027     if( x264_lookahead_init( h, i_slicetype_length ) )
1028         goto fail;
1029
1030     for( i = 0; i < h->param.i_threads; i++ )
1031     {
1032         int init_nal_count = h->param.i_slice_count + 3;
1033         int allocate_threadlocal_data = !h->param.b_sliced_threads || !i;
1034         if( i > 0 )
1035             *h->thread[i] = *h;
1036
1037         if( allocate_threadlocal_data )
1038         {
1039             h->thread[i]->fdec = x264_frame_pop_unused( h, 1 );
1040             if( !h->thread[i]->fdec )
1041                 goto fail;
1042         }
1043         else
1044             h->thread[i]->fdec = h->thread[0]->fdec;
1045
1046         CHECKED_MALLOC( h->thread[i]->out.p_bitstream, h->out.i_bitstream );
1047         /* Start each thread with room for init_nal_count NAL units; it'll realloc later if needed. */
1048         CHECKED_MALLOC( h->thread[i]->out.nal, init_nal_count*sizeof(x264_nal_t) );
1049         h->thread[i]->out.i_nals_allocated = init_nal_count;
1050
1051         if( allocate_threadlocal_data && x264_macroblock_cache_init( h->thread[i] ) < 0 )
1052             goto fail;
1053     }
1054
1055     /* Allocate scratch buffer */
1056     for( i = 0; i < h->param.i_threads + !!h->param.i_sync_lookahead; i++ )
1057     {
1058         int buf_hpel = (h->fdec->i_width[0]+48) * sizeof(int16_t);
1059         int buf_ssim = h->param.analyse.b_ssim * 8 * (h->param.i_width/4+3) * sizeof(int);
1060         int me_range = X264_MIN(h->param.analyse.i_me_range, h->param.analyse.i_mv_range);
1061         int buf_tesa = (h->param.analyse.i_me_method >= X264_ME_ESA) *
1062             ((me_range*2+18) * sizeof(int16_t) + (me_range+4) * (me_range+1) * 4 * sizeof(mvsad_t));
1063         int buf_mbtree = h->param.rc.b_mb_tree * ((h->sps->i_mb_width+3)&~3) * sizeof(int);
1064         int buf_nnz = !h->param.b_cabac * h->pps->b_transform_8x8_mode * (h->sps->i_mb_width * 4 * 16 * sizeof(uint8_t));
1065         int scratch_size = X264_MAX4( buf_hpel, buf_ssim, buf_tesa, X264_MAX( buf_mbtree, buf_nnz ) );
1066         CHECKED_MALLOC( h->thread[i]->scratch_buffer, scratch_size );
1067     }
1068
1069     if( x264_ratecontrol_new( h ) < 0 )
1070         goto fail;
1071
1072     if( h->param.psz_dump_yuv )
1073     {
1074         /* create or truncate the reconstructed video file */
1075         FILE *f = fopen( h->param.psz_dump_yuv, "w" );
1076         if( !f )
1077         {
1078             x264_log( h, X264_LOG_ERROR, "dump_yuv: can't write to %s\n", h->param.psz_dump_yuv );
1079             goto fail;
1080         }
1081         else if( !x264_is_regular_file( f ) )
1082         {
1083             x264_log( h, X264_LOG_ERROR, "dump_yuv: incompatible with non-regular file %s\n", h->param.psz_dump_yuv );
1084             goto fail;
1085         }
1086         fclose( f );
1087     }
1088
1089     x264_log( h, X264_LOG_INFO, "profile %s, level %d.%d\n",
1090         h->sps->i_profile_idc == PROFILE_BASELINE ? "Baseline" :
1091         h->sps->i_profile_idc == PROFILE_MAIN ? "Main" :
1092         h->sps->i_profile_idc == PROFILE_HIGH ? "High" :
1093         "High 4:4:4 Predictive", h->sps->i_level_idc/10, h->sps->i_level_idc%10 );
1094
1095     return h;
1096 fail:
1097     x264_free( h );
1098     return NULL;
1099 }
1100
1101 /****************************************************************************
1102  * x264_encoder_reconfig:
1103  ****************************************************************************/
1104 int x264_encoder_reconfig( x264_t *h, x264_param_t *param )
1105 {
1106     h = h->thread[h->thread[0]->i_thread_phase];
1107     x264_set_aspect_ratio( h, param, 0 );
1108 #define COPY(var) h->param.var = param->var
1109     COPY( i_frame_reference ); // but never uses more refs than initially specified
1110     COPY( i_bframe_bias );
1111     if( h->param.i_scenecut_threshold )
1112         COPY( i_scenecut_threshold ); // can't turn it on or off, only vary the threshold
1113     COPY( b_deblocking_filter );
1114     COPY( i_deblocking_filter_alphac0 );
1115     COPY( i_deblocking_filter_beta );
1116     COPY( analyse.inter );
1117     COPY( analyse.intra );
1118     COPY( analyse.i_direct_mv_pred );
1119     /* Scratch buffer prevents me_range from being increased for esa/tesa */
1120     if( h->param.analyse.i_me_method < X264_ME_ESA || param->analyse.i_me_range < h->param.analyse.i_me_range )
1121         COPY( analyse.i_me_range );
1122     COPY( analyse.i_noise_reduction );
1123     /* We can't switch out of subme=0 during encoding. */
1124     if( h->param.analyse.i_subpel_refine )
1125         COPY( analyse.i_subpel_refine );
1126     COPY( analyse.i_trellis );
1127     COPY( analyse.b_chroma_me );
1128     COPY( analyse.b_dct_decimate );
1129     COPY( analyse.b_fast_pskip );
1130     COPY( analyse.b_mixed_references );
1131     COPY( analyse.f_psy_rd );
1132     COPY( analyse.f_psy_trellis );
1133     // can only twiddle these if they were enabled to begin with:
1134     if( h->param.analyse.i_me_method >= X264_ME_ESA || param->analyse.i_me_method < X264_ME_ESA )
1135         COPY( analyse.i_me_method );
1136     if( h->param.analyse.i_me_method >= X264_ME_ESA && !h->frames.b_have_sub8x8_esa )
1137         h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
1138     if( h->pps->b_transform_8x8_mode )
1139         COPY( analyse.b_transform_8x8 );
1140     if( h->frames.i_max_ref1 > 1 )
1141         COPY( i_bframe_pyramid );
1142     COPY( i_slice_max_size );
1143     COPY( i_slice_max_mbs );
1144     COPY( i_slice_count );
1145     /* VBV can't be turned on if it wasn't on to begin with */
1146     if( h->param.rc.i_vbv_max_bitrate > 0 && h->param.rc.i_vbv_buffer_size > 0 &&
1147           param->rc.i_vbv_max_bitrate > 0 &&   param->rc.i_vbv_buffer_size > 0 )
1148     {
1149         COPY( rc.i_vbv_max_bitrate );
1150         COPY( rc.i_vbv_buffer_size );
1151         COPY( rc.i_bitrate );
1152     }
1153     COPY( rc.f_rf_constant );
1154 #undef COPY
1155
1156     mbcmp_init( h );
1157
1158     int ret = x264_validate_parameters( h );
1159
1160     /* Supported reconfiguration options (1-pass only):
1161      * vbv-maxrate
1162      * vbv-bufsize
1163      * crf
1164      * bitrate (CBR only) */
1165     if( !ret )
1166         x264_ratecontrol_init_reconfigurable( h, 0 );
1167
1168     return ret;
1169 }
1170
1171 /****************************************************************************
1172  * x264_encoder_parameters:
1173  ****************************************************************************/
1174 void x264_encoder_parameters( x264_t *h, x264_param_t *param )
1175 {
1176     memcpy( param, &h->thread[h->i_thread_phase]->param, sizeof(x264_param_t) );
1177 }
1178
1179 /* internal usage */
1180 static void x264_nal_start( x264_t *h, int i_type, int i_ref_idc )
1181 {
1182     x264_nal_t *nal = &h->out.nal[h->out.i_nal];
1183
1184     nal->i_ref_idc = i_ref_idc;
1185     nal->i_type    = i_type;
1186
1187     nal->i_payload= 0;
1188     nal->p_payload= &h->out.p_bitstream[bs_pos( &h->out.bs ) / 8];
1189 }
1190 /* if number of allocated nals is not enough, re-allocate a larger one. */
1191 static int x264_nal_check_buffer( x264_t *h )
1192 {
1193     if( h->out.i_nal >= h->out.i_nals_allocated )
1194     {
1195         x264_nal_t *new_out = x264_malloc( sizeof(x264_nal_t) * (h->out.i_nals_allocated*2) );
1196         if( !new_out )
1197             return -1;
1198         memcpy( new_out, h->out.nal, sizeof(x264_nal_t) * (h->out.i_nals_allocated) );
1199         x264_free( h->out.nal );
1200         h->out.nal = new_out;
1201         h->out.i_nals_allocated *= 2;
1202     }
1203     return 0;
1204 }
1205 static int x264_nal_end( x264_t *h )
1206 {
1207     x264_nal_t *nal = &h->out.nal[h->out.i_nal];
1208     nal->i_payload = &h->out.p_bitstream[bs_pos( &h->out.bs ) / 8] - nal->p_payload;
1209     h->out.i_nal++;
1210
1211     return x264_nal_check_buffer( h );
1212 }
1213
1214 static int x264_encoder_encapsulate_nals( x264_t *h )
1215 {
1216     int nal_size = 0, i;
1217     for( i = 0; i < h->out.i_nal; i++ )
1218         nal_size += h->out.nal[i].i_payload;
1219
1220     /* Worst-case NAL unit escaping: reallocate the buffer if it's too small. */
1221     if( h->nal_buffer_size < nal_size * 3/2 + h->out.i_nal * 4 )
1222     {
1223         uint8_t *buf = x264_malloc( nal_size * 2 + h->out.i_nal * 4 );
1224         if( !buf )
1225             return -1;
1226         x264_free( h->nal_buffer );
1227         h->nal_buffer = buf;
1228     }
1229
1230     uint8_t *nal_buffer = h->nal_buffer;
1231
1232     for( i = 0; i < h->out.i_nal; i++ )
1233     {
1234         int long_startcode = !i || h->out.nal[i].i_type == NAL_SPS || h->out.nal[i].i_type == NAL_PPS;
1235         int size = x264_nal_encode( nal_buffer, &h->out.nal[i], h->param.b_annexb, long_startcode );
1236         h->out.nal[i].i_payload = size;
1237         h->out.nal[i].p_payload = nal_buffer;
1238         nal_buffer += size;
1239     }
1240
1241     return nal_buffer - h->nal_buffer;
1242 }
1243
1244 /****************************************************************************
1245  * x264_encoder_headers:
1246  ****************************************************************************/
1247 int x264_encoder_headers( x264_t *h, x264_nal_t **pp_nal, int *pi_nal )
1248 {
1249     int frame_size = 0;
1250     /* init bitstream context */
1251     h->out.i_nal = 0;
1252     bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );
1253
1254     /* Write SEI, SPS and PPS. */
1255     x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
1256     if( x264_sei_version_write( h, &h->out.bs ) )
1257         return -1;
1258     if( x264_nal_end( h ) )
1259         return -1;
1260
1261     /* generate sequence parameters */
1262     x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
1263     x264_sps_write( &h->out.bs, h->sps );
1264     if( x264_nal_end( h ) )
1265         return -1;
1266
1267     /* generate picture parameters */
1268     x264_nal_start( h, NAL_PPS, NAL_PRIORITY_HIGHEST );
1269     x264_pps_write( &h->out.bs, h->pps );
1270     if( x264_nal_end( h ) )
1271         return -1;
1272
1273     frame_size = x264_encoder_encapsulate_nals( h );
1274
1275     /* now set output*/
1276     *pi_nal = h->out.i_nal;
1277     *pp_nal = &h->out.nal[0];
1278     h->out.i_nal = 0;
1279
1280     return frame_size;
1281 }
1282
1283 /* Check to see whether we have chosen a reference list ordering different
1284  * from the standard's default. */
1285 static inline void x264_reference_check_reorder( x264_t *h )
1286 {
1287     int i;
1288     for( i = 0; i < h->i_ref0 - 1; i++ )
1289         /* P and B-frames use different default orders. */
1290         if( h->sh.i_type == SLICE_TYPE_P ? h->fref0[i]->i_frame_num < h->fref0[i+1]->i_frame_num
1291                                          : h->fref0[i]->i_poc < h->fref0[i+1]->i_poc )
1292         {
1293             h->b_ref_reorder[0] = 1;
1294             break;
1295         }
1296 }
1297
1298 /* return -1 on failure, else return the index of the new reference frame */
1299 int x264_weighted_reference_duplicate( x264_t *h, int i_ref, const x264_weight_t *w )
1300 {
1301     int i = h->i_ref0;
1302     int j;
1303     x264_frame_t *newframe;
1304     if( i <= 1 ) /* empty list, definitely can't duplicate frame */
1305         return -1;
1306
1307     /* Find a place to insert the duplicate in the reference list. */
1308     for( j = 0; j < i; j++ )
1309         if( h->fref0[i_ref]->i_frame != h->fref0[j]->i_frame )
1310         {
1311             /* found a place, after j, make sure there is not already a duplicate there */
1312             if( j == i-1 || ( h->fref0[j+1] && h->fref0[i_ref]->i_frame != h->fref0[j+1]->i_frame ) )
1313                 break;
1314         }
1315
1316     if( j == i ) /* No room in the reference list for the duplicate. */
1317         return -1;
1318     j++;
1319
1320     newframe = x264_frame_pop_blank_unused( h );
1321
1322     //FIXME: probably don't need to copy everything
1323     *newframe = *h->fref0[i_ref];
1324     newframe->i_reference_count = 1;
1325     newframe->orig = h->fref0[i_ref];
1326     newframe->b_duplicate = 1;
1327     memcpy( h->fenc->weight[j], w, sizeof(h->fenc->weight[i]) );
1328
1329     /* shift the frames to make space for the dupe. */
1330     h->b_ref_reorder[0] = 1;
1331     if( h->i_ref0 < 16 )
1332         ++h->i_ref0;
1333     h->fref0[15] = NULL;
1334     x264_frame_unshift( &h->fref0[j], newframe );
1335
1336     return j;
1337 }
1338
1339 static void x264_weighted_pred_init( x264_t *h )
1340 {
1341     int i_ref;
1342     int i;
1343
1344     /* for now no analysis and set all weights to nothing */
1345     for( i_ref = 0; i_ref < h->i_ref0; i_ref++ )
1346         h->fenc->weighted[i_ref] = h->fref0[i_ref]->filtered[0];
1347
1348     // FIXME: This only supports weighting of one reference frame
1349     // and duplicates of that frame.
1350     h->fenc->i_lines_weighted = 0;
1351
1352     for( i_ref = 0; i_ref < (h->i_ref0 << h->sh.b_mbaff); i_ref++ )
1353         for( i = 0; i < 3; i++ )
1354             h->sh.weight[i_ref][i].weightfn = NULL;
1355
1356
1357     if( h->sh.i_type != SLICE_TYPE_P || h->param.analyse.i_weighted_pred <= 0 )
1358         return;
1359
1360     int i_padv = PADV << h->param.b_interlaced;
1361     int denom = -1;
1362     int weightluma = 0;
1363     int buffer_next = 0;
1364     int j;
1365     //FIXME: when chroma support is added, move this into loop
1366     h->sh.weight[0][1].weightfn = h->sh.weight[0][2].weightfn = NULL;
1367     h->sh.weight[0][1].i_denom = h->sh.weight[0][2].i_denom = 0;
1368     for( j = 0; j < h->i_ref0; j++ )
1369     {
1370         if( h->fenc->weight[j][0].weightfn )
1371         {
1372             h->sh.weight[j][0] = h->fenc->weight[j][0];
1373             // if weight is useless, don't write it to stream
1374             if( h->sh.weight[j][0].i_scale == 1<<h->sh.weight[j][0].i_denom && h->sh.weight[j][0].i_offset == 0 )
1375                 h->sh.weight[j][0].weightfn = NULL;
1376             else
1377             {
1378                 if( !weightluma )
1379                 {
1380                     weightluma = 1;
1381                     h->sh.weight[0][0].i_denom = denom = h->sh.weight[j][0].i_denom;
1382                     assert( x264_clip3( denom, 0, 7 ) == denom );
1383                 }
1384                 assert( h->sh.weight[j][0].i_denom == denom );
1385                 assert( x264_clip3( h->sh.weight[j][0].i_scale, 0, 127 ) == h->sh.weight[j][0].i_scale );
1386                 assert( x264_clip3( h->sh.weight[j][0].i_offset, -128, 127 ) == h->sh.weight[j][0].i_offset );
1387                 h->fenc->weighted[j] = h->mb.p_weight_buf[buffer_next++] +
1388                     h->fenc->i_stride[0] * i_padv + PADH;
1389             }
1390         }
1391
1392         //scale full resolution frame
1393         if( h->sh.weight[j][0].weightfn && h->param.i_threads == 1 )
1394         {
1395             uint8_t *src = h->fref0[j]->filtered[0] - h->fref0[j]->i_stride[0]*i_padv - PADH;
1396             uint8_t *dst = h->fenc->weighted[j] - h->fenc->i_stride[0]*i_padv - PADH;
1397             int stride = h->fenc->i_stride[0];
1398             int width = h->fenc->i_width[0] + PADH*2;
1399             int height = h->fenc->i_lines[0] + i_padv*2;
1400             x264_weight_scale_plane( h, dst, stride, src, stride, width, height, &h->sh.weight[j][0] );
1401             h->fenc->i_lines_weighted = height;
1402         }
1403     }
1404     if( !weightluma )
1405         h->sh.weight[0][0].i_denom = 0;
1406 }
1407
1408 static inline void x264_reference_build_list( x264_t *h, int i_poc )
1409 {
1410     int i, b_ok;
1411
1412     /* build ref list 0/1 */
1413     h->mb.pic.i_fref[0] = h->i_ref0 = 0;
1414     h->mb.pic.i_fref[1] = h->i_ref1 = 0;
1415     if( h->sh.i_type == SLICE_TYPE_I )
1416         return;
1417
1418     for( i = 0; h->frames.reference[i]; i++ )
1419     {
1420         if( h->frames.reference[i]->i_poc < i_poc )
1421         {
1422             h->fref0[h->i_ref0++] = h->frames.reference[i];
1423         }
1424         else if( h->frames.reference[i]->i_poc > i_poc )
1425         {
1426             h->fref1[h->i_ref1++] = h->frames.reference[i];
1427         }
1428     }
1429
1430     /* Order ref0 from higher to lower poc */
1431     do
1432     {
1433         b_ok = 1;
1434         for( i = 0; i < h->i_ref0 - 1; i++ )
1435         {
1436             if( h->fref0[i]->i_poc < h->fref0[i+1]->i_poc )
1437             {
1438                 XCHG( x264_frame_t*, h->fref0[i], h->fref0[i+1] );
1439                 b_ok = 0;
1440                 break;
1441             }
1442         }
1443     } while( !b_ok );
1444
1445     if( h->sh.i_mmco_remove_from_end )
1446         for( i = h->i_ref0-1; i >= h->i_ref0 - h->sh.i_mmco_remove_from_end; i-- )
1447         {
1448             int diff = h->i_frame_num - h->fref0[i]->i_frame_num;
1449             h->sh.mmco[h->sh.i_mmco_command_count].i_poc = h->fref0[i]->i_poc;
1450             h->sh.mmco[h->sh.i_mmco_command_count++].i_difference_of_pic_nums = diff;
1451         }
1452
1453     /* Order ref1 from lower to higher poc (bubble sort) for B-frame */
1454     do
1455     {
1456         b_ok = 1;
1457         for( i = 0; i < h->i_ref1 - 1; i++ )
1458         {
1459             if( h->fref1[i]->i_poc > h->fref1[i+1]->i_poc )
1460             {
1461                 XCHG( x264_frame_t*, h->fref1[i], h->fref1[i+1] );
1462                 b_ok = 0;
1463                 break;
1464             }
1465         }
1466     } while( !b_ok );
1467
1468     x264_reference_check_reorder( h );
1469
1470     h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
1471     h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
1472     h->i_ref0 = X264_MIN( h->i_ref0, h->param.i_frame_reference ); // if reconfig() has lowered the limit
1473
1474     /* add duplicates */
1475     if( h->fenc->i_type == X264_TYPE_P )
1476     {
1477         int idx = -1;
1478         if( h->param.analyse.i_weighted_pred == X264_WEIGHTP_SMART )
1479         {
1480             x264_weight_t w[3];
1481             w[1].weightfn = w[2].weightfn = NULL;
1482             if( h->param.rc.b_stat_read )
1483                 x264_ratecontrol_set_weights( h, h->fenc );
1484
1485             if( !h->fenc->weight[0][0].weightfn )
1486             {
1487                 h->fenc->weight[0][0].i_denom = 0;
1488                 SET_WEIGHT( w[0], 1, 1, 0, -1 );
1489                 idx = x264_weighted_reference_duplicate( h, 0, w );
1490             }
1491             else
1492             {
1493                 if( h->fenc->weight[0][0].i_scale == 1<<h->fenc->weight[0][0].i_denom )
1494                 {
1495                     SET_WEIGHT( h->fenc->weight[0][0], 1, 1, 0, h->fenc->weight[0][0].i_offset );
1496                 }
1497                 x264_weighted_reference_duplicate( h, 0, weight_none );
1498                 if( h->fenc->weight[0][0].i_offset > -128 )
1499                 {
1500                     w[0] = h->fenc->weight[0][0];
1501                     w[0].i_offset--;
1502                     h->mc.weight_cache( h, &w[0] );
1503                     idx = x264_weighted_reference_duplicate( h, 0, w );
1504                 }
1505             }
1506         }
1507         else if( h->param.analyse.i_weighted_pred == X264_WEIGHTP_BLIND )
1508         {
1509             //weighted offset=-1
1510             x264_weight_t w[3];
1511             SET_WEIGHT( w[0], 1, 1, 0, -1 );
1512             h->fenc->weight[0][0].i_denom = 0;
1513             w[1].weightfn = w[2].weightfn = NULL;
1514             idx = x264_weighted_reference_duplicate( h, 0, w );
1515         }
1516         h->mb.ref_blind_dupe = idx;
1517     }
1518
1519     assert( h->i_ref0 + h->i_ref1 <= 16 );
1520     h->mb.pic.i_fref[0] = h->i_ref0;
1521     h->mb.pic.i_fref[1] = h->i_ref1;
1522 }
1523
1524 static void x264_fdec_filter_row( x264_t *h, int mb_y )
1525 {
1526     /* mb_y is the mb to be encoded next, not the mb to be filtered here */
1527     int b_hpel = h->fdec->b_kept_as_ref;
1528     int b_deblock = !h->sh.i_disable_deblocking_filter_idc;
1529     int b_end = mb_y == h->sps->i_mb_height;
1530     int min_y = mb_y - (1 << h->sh.b_mbaff);
1531     int max_y = b_end ? h->sps->i_mb_height : mb_y;
1532     b_deblock &= b_hpel || h->param.psz_dump_yuv;
1533     if( mb_y & h->sh.b_mbaff )
1534         return;
1535     if( min_y < 0 )
1536         return;
1537
1538     if( !b_end && !h->param.b_sliced_threads )
1539     {
1540         int i, j;
1541         for( j=0; j<=h->sh.b_mbaff; j++ )
1542             for( i=0; i<3; i++ )
1543             {
1544                 memcpy( h->mb.intra_border_backup[j][i],
1545                         h->fdec->plane[i] + ((mb_y*16 >> !!i) + j - 1 - h->sh.b_mbaff) * h->fdec->i_stride[i],
1546                         h->sps->i_mb_width*16 >> !!i );
1547             }
1548     }
1549
1550     if( b_deblock )
1551     {
1552         int y;
1553         for( y = min_y; y < max_y; y += (1 << h->sh.b_mbaff) )
1554             x264_frame_deblock_row( h, y );
1555     }
1556
1557     if( b_hpel )
1558     {
1559         x264_frame_expand_border( h, h->fdec, min_y, b_end );
1560         if( h->param.analyse.i_subpel_refine )
1561         {
1562             x264_frame_filter( h, h->fdec, min_y, b_end );
1563             x264_frame_expand_border_filtered( h, h->fdec, min_y, b_end );
1564         }
1565     }
1566
1567     if( h->i_thread_frames > 1 && h->fdec->b_kept_as_ref )
1568         x264_frame_cond_broadcast( h->fdec, mb_y*16 + (b_end ? 10000 : -(X264_THREAD_HEIGHT << h->sh.b_mbaff)) );
1569
1570     min_y = X264_MAX( min_y*16-8, 0 );
1571     max_y = b_end ? h->param.i_height : mb_y*16-8;
1572
1573     if( h->param.analyse.b_psnr )
1574     {
1575         int i;
1576         for( i=0; i<3; i++ )
1577             h->stat.frame.i_ssd[i] +=
1578                 x264_pixel_ssd_wxh( &h->pixf,
1579                     h->fdec->plane[i] + (min_y>>!!i) * h->fdec->i_stride[i], h->fdec->i_stride[i],
1580                     h->fenc->plane[i] + (min_y>>!!i) * h->fenc->i_stride[i], h->fenc->i_stride[i],
1581                     h->param.i_width >> !!i, (max_y-min_y) >> !!i );
1582     }
1583
1584     if( h->param.analyse.b_ssim )
1585     {
1586         x264_emms();
1587         /* offset by 2 pixels to avoid alignment of ssim blocks with dct blocks,
1588          * and overlap by 4 */
1589         min_y += min_y == 0 ? 2 : -6;
1590         h->stat.frame.f_ssim +=
1591             x264_pixel_ssim_wxh( &h->pixf,
1592                 h->fdec->plane[0] + 2+min_y*h->fdec->i_stride[0], h->fdec->i_stride[0],
1593                 h->fenc->plane[0] + 2+min_y*h->fenc->i_stride[0], h->fenc->i_stride[0],
1594                 h->param.i_width-2, max_y-min_y, h->scratch_buffer );
1595     }
1596 }
1597
1598 static inline int x264_reference_update( x264_t *h )
1599 {
1600     int i, j;
1601     if( !h->fdec->b_kept_as_ref )
1602     {
1603         if( h->i_thread_frames > 1 )
1604         {
1605             x264_frame_push_unused( h, h->fdec );
1606             h->fdec = x264_frame_pop_unused( h, 1 );
1607             if( !h->fdec )
1608                 return -1;
1609         }
1610         return 0;
1611     }
1612
1613     /* apply mmco from previous frame. */
1614     for( i = 0; i < h->sh.i_mmco_command_count; i++ )
1615         for( j = 0; h->frames.reference[j]; j++ )
1616             if( h->frames.reference[j]->i_poc == h->sh.mmco[i].i_poc )
1617                 x264_frame_push_unused( h, x264_frame_shift( &h->frames.reference[j] ) );
1618
1619     /* move frame in the buffer */
1620     x264_frame_push( h->frames.reference, h->fdec );
1621     if( h->frames.reference[h->sps->i_num_ref_frames] )
1622         x264_frame_push_unused( h, x264_frame_shift( h->frames.reference ) );
1623     h->fdec = x264_frame_pop_unused( h, 1 );
1624     if( !h->fdec )
1625         return -1;
1626     return 0;
1627 }
1628
1629 static inline void x264_reference_reset( x264_t *h )
1630 {
1631     while( h->frames.reference[0] )
1632         x264_frame_push_unused( h, x264_frame_pop( h->frames.reference ) );
1633     h->fdec->i_poc =
1634     h->fenc->i_poc = 0;
1635 }
1636
1637 static inline void x264_reference_hierarchy_reset( x264_t *h )
1638 {
1639     int i, ref;
1640     int b_hasdelayframe = 0;
1641     if( !h->param.i_bframe_pyramid )
1642         return;
1643
1644     /* look for delay frames -- chain must only contain frames that are disposable */
1645     for( i = 0; h->frames.current[i] && IS_DISPOSABLE( h->frames.current[i]->i_type ); i++ )
1646         b_hasdelayframe |= h->frames.current[i]->i_coded
1647                         != h->frames.current[i]->i_frame + h->sps->vui.i_num_reorder_frames;
1648
1649     if( h->param.i_bframe_pyramid != X264_B_PYRAMID_STRICT && !b_hasdelayframe )
1650         return;
1651
1652     /* Remove last BREF. There will never be old BREFs in the
1653      * dpb during a BREF decode when pyramid == STRICT */
1654     for( ref = 0; h->frames.reference[ref]; ref++ )
1655     {
1656         if( h->param.i_bframe_pyramid == X264_B_PYRAMID_STRICT
1657             && h->frames.reference[ref]->i_type == X264_TYPE_BREF )
1658         {
1659             int diff = h->i_frame_num - h->frames.reference[ref]->i_frame_num;
1660             h->sh.mmco[h->sh.i_mmco_command_count].i_difference_of_pic_nums = diff;
1661             h->sh.mmco[h->sh.i_mmco_command_count++].i_poc = h->frames.reference[ref]->i_poc;
1662             x264_frame_push_unused( h, x264_frame_pop( h->frames.reference ) );
1663             h->b_ref_reorder[0] = 1;
1664             break;
1665         }
1666     }
1667
1668     /* Prepare to room in the dpb for the delayed display time of the later b-frame's */
1669     h->sh.i_mmco_remove_from_end = X264_MAX( ref + 2 - h->frames.i_max_dpb, 0 );
1670 }
1671
1672 static inline void x264_slice_init( x264_t *h, int i_nal_type, int i_global_qp )
1673 {
1674     /* ------------------------ Create slice header  ----------------------- */
1675     if( i_nal_type == NAL_SLICE_IDR )
1676     {
1677         x264_slice_header_init( h, &h->sh, h->sps, h->pps, h->i_idr_pic_id, h->i_frame_num, i_global_qp );
1678
1679         /* increment id */
1680         h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
1681     }
1682     else
1683     {
1684         x264_slice_header_init( h, &h->sh, h->sps, h->pps, -1, h->i_frame_num, i_global_qp );
1685
1686         /* always set the real higher num of ref frame used */
1687         h->sh.b_num_ref_idx_override = 1;
1688         h->sh.i_num_ref_idx_l0_active = h->i_ref0 <= 0 ? 1 : h->i_ref0;
1689         h->sh.i_num_ref_idx_l1_active = h->i_ref1 <= 0 ? 1 : h->i_ref1;
1690     }
1691
1692     h->fdec->i_frame_num = h->sh.i_frame_num;
1693
1694     if( h->sps->i_poc_type == 0 )
1695     {
1696         h->sh.i_poc_lsb = h->fdec->i_poc & ( (1 << h->sps->i_log2_max_poc_lsb) - 1 );
1697         h->sh.i_delta_poc_bottom = 0;
1698     }
1699     else if( h->sps->i_poc_type == 1 )
1700     {
1701         /* FIXME TODO FIXME */
1702     }
1703     else
1704     {
1705         /* Nothing to do ? */
1706     }
1707
1708     x264_macroblock_slice_init( h );
1709 }
1710
1711 static int x264_slice_write( x264_t *h )
1712 {
1713     int i_skip;
1714     int mb_xy, i_mb_x, i_mb_y;
1715     int i, i_list, i_ref, i_skip_bak = 0; /* Shut up GCC. */
1716     bs_t bs_bak;
1717     x264_cabac_t cabac_bak;
1718     uint8_t cabac_prevbyte_bak = 0; /* Shut up GCC. */
1719     /* Assume no more than 3 bytes of NALU escaping.
1720      * NALUs other than the first use a 3-byte startcode. */
1721     int overhead_guess = (NALU_OVERHEAD - (h->param.b_annexb && h->out.i_nal)) + 3;
1722     int slice_max_size = h->param.i_slice_max_size > 0 ? (h->param.i_slice_max_size-overhead_guess)*8 : INT_MAX;
1723     int starting_bits = bs_pos(&h->out.bs);
1724     bs_realign( &h->out.bs );
1725
1726     /* Slice */
1727     x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
1728
1729     /* Slice header */
1730     x264_macroblock_thread_init( h );
1731     x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
1732     if( h->param.b_cabac )
1733     {
1734         /* alignment needed */
1735         bs_align_1( &h->out.bs );
1736
1737         /* init cabac */
1738         x264_cabac_context_init( &h->cabac, h->sh.i_type, h->sh.i_qp, h->sh.i_cabac_init_idc );
1739         x264_cabac_encode_init ( &h->cabac, h->out.bs.p, h->out.bs.p_end );
1740     }
1741     h->mb.i_last_qp = h->sh.i_qp;
1742     h->mb.i_last_dqp = 0;
1743
1744     i_mb_y = h->sh.i_first_mb / h->sps->i_mb_width;
1745     i_mb_x = h->sh.i_first_mb % h->sps->i_mb_width;
1746     i_skip = 0;
1747
1748     while( (mb_xy = i_mb_x + i_mb_y * h->sps->i_mb_width) <= h->sh.i_last_mb )
1749     {
1750         int mb_spos = bs_pos(&h->out.bs) + x264_cabac_pos(&h->cabac);
1751         if( h->param.i_slice_max_size > 0 )
1752         {
1753             /* We don't need the contexts because flushing the CABAC encoder has no context
1754              * dependency and macroblocks are only re-encoded in the case where a slice is
1755              * ended (and thus the content of all contexts are thrown away). */
1756             if( h->param.b_cabac )
1757             {
1758                 memcpy( &cabac_bak, &h->cabac, offsetof(x264_cabac_t, f8_bits_encoded) );
1759                 /* x264's CABAC writer modifies the previous byte during carry, so it has to be
1760                  * backed up. */
1761                 cabac_prevbyte_bak = h->cabac.p[-1];
1762             }
1763             else
1764             {
1765                 bs_bak = h->out.bs;
1766                 i_skip_bak = i_skip;
1767             }
1768         }
1769
1770         if( i_mb_x == 0 && !h->mb.b_reencode_mb && !h->param.b_sliced_threads )
1771             x264_fdec_filter_row( h, i_mb_y );
1772
1773         /* load cache */
1774         x264_macroblock_cache_load( h, i_mb_x, i_mb_y );
1775
1776         x264_macroblock_analyse( h );
1777
1778         /* encode this macroblock -> be careful it can change the mb type to P_SKIP if needed */
1779         x264_macroblock_encode( h );
1780
1781         if( x264_bitstream_check_buffer( h ) )
1782             return -1;
1783
1784         if( h->param.b_cabac )
1785         {
1786             if( mb_xy > h->sh.i_first_mb && !(h->sh.b_mbaff && (i_mb_y&1)) )
1787                 x264_cabac_encode_terminal( &h->cabac );
1788
1789             if( IS_SKIP( h->mb.i_type ) )
1790                 x264_cabac_mb_skip( h, 1 );
1791             else
1792             {
1793                 if( h->sh.i_type != SLICE_TYPE_I )
1794                     x264_cabac_mb_skip( h, 0 );
1795                 x264_macroblock_write_cabac( h, &h->cabac );
1796             }
1797         }
1798         else
1799         {
1800             if( IS_SKIP( h->mb.i_type ) )
1801                 i_skip++;
1802             else
1803             {
1804                 if( h->sh.i_type != SLICE_TYPE_I )
1805                 {
1806                     bs_write_ue( &h->out.bs, i_skip );  /* skip run */
1807                     i_skip = 0;
1808                 }
1809                 x264_macroblock_write_cavlc( h );
1810             }
1811         }
1812
1813         int total_bits = bs_pos(&h->out.bs) + x264_cabac_pos(&h->cabac);
1814         int mb_size = total_bits - mb_spos;
1815
1816         /* We'll just re-encode this last macroblock if we go over the max slice size. */
1817         if( total_bits - starting_bits > slice_max_size && !h->mb.b_reencode_mb )
1818         {
1819             if( mb_xy != h->sh.i_first_mb )
1820             {
1821                 if( h->param.b_cabac )
1822                 {
1823                     memcpy( &h->cabac, &cabac_bak, offsetof(x264_cabac_t, f8_bits_encoded) );
1824                     h->cabac.p[-1] = cabac_prevbyte_bak;
1825                 }
1826                 else
1827                 {
1828                     h->out.bs = bs_bak;
1829                     i_skip = i_skip_bak;
1830                 }
1831                 h->mb.b_reencode_mb = 1;
1832                 h->sh.i_last_mb = mb_xy-1;
1833                 break;
1834             }
1835             else
1836             {
1837                 h->sh.i_last_mb = mb_xy;
1838                 h->mb.b_reencode_mb = 0;
1839             }
1840         }
1841         else
1842             h->mb.b_reencode_mb = 0;
1843
1844 #ifdef HAVE_VISUALIZE
1845         if( h->param.b_visualize )
1846             x264_visualize_mb( h );
1847 #endif
1848
1849         /* save cache */
1850         x264_macroblock_cache_save( h );
1851
1852         /* accumulate mb stats */
1853         h->stat.frame.i_mb_count[h->mb.i_type]++;
1854
1855         if( !IS_INTRA(h->mb.i_type) && !IS_SKIP(h->mb.i_type) && !IS_DIRECT(h->mb.i_type) )
1856         {
1857             if( h->mb.i_partition != D_8x8 )
1858                     h->stat.frame.i_mb_partition[h->mb.i_partition] += 4;
1859                 else
1860                     for( i = 0; i < 4; i++ )
1861                         h->stat.frame.i_mb_partition[h->mb.i_sub_partition[i]] ++;
1862             if( h->param.i_frame_reference > 1 )
1863                 for( i_list = 0; i_list <= (h->sh.i_type == SLICE_TYPE_B); i_list++ )
1864                     for( i = 0; i < 4; i++ )
1865                     {
1866                         i_ref = h->mb.cache.ref[i_list][ x264_scan8[4*i] ];
1867                         if( i_ref >= 0 )
1868                             h->stat.frame.i_mb_count_ref[i_list][i_ref] ++;
1869                     }
1870         }
1871
1872         if( h->param.i_log_level >= X264_LOG_INFO )
1873         {
1874             if( h->mb.i_cbp_luma || h->mb.i_cbp_chroma )
1875             {
1876                 int cbpsum = (h->mb.i_cbp_luma&1) + ((h->mb.i_cbp_luma>>1)&1)
1877                            + ((h->mb.i_cbp_luma>>2)&1) + (h->mb.i_cbp_luma>>3);
1878                 int b_intra = IS_INTRA(h->mb.i_type);
1879                 h->stat.frame.i_mb_cbp[!b_intra + 0] += cbpsum;
1880                 h->stat.frame.i_mb_cbp[!b_intra + 2] += h->mb.i_cbp_chroma >= 1;
1881                 h->stat.frame.i_mb_cbp[!b_intra + 4] += h->mb.i_cbp_chroma == 2;
1882             }
1883             if( h->mb.i_cbp_luma && !IS_INTRA(h->mb.i_type) )
1884             {
1885                 h->stat.frame.i_mb_count_8x8dct[0] ++;
1886                 h->stat.frame.i_mb_count_8x8dct[1] += h->mb.b_transform_8x8;
1887             }
1888             if( IS_INTRA(h->mb.i_type) && h->mb.i_type != I_PCM )
1889             {
1890                 if( h->mb.i_type == I_16x16 )
1891                     h->stat.frame.i_mb_pred_mode[0][h->mb.i_intra16x16_pred_mode]++;
1892                 else if( h->mb.i_type == I_8x8 )
1893                     for( i = 0; i < 16; i += 4 )
1894                         h->stat.frame.i_mb_pred_mode[1][h->mb.cache.intra4x4_pred_mode[x264_scan8[i]]]++;
1895                 else //if( h->mb.i_type == I_4x4 )
1896                     for( i = 0; i < 16; i++ )
1897                         h->stat.frame.i_mb_pred_mode[2][h->mb.cache.intra4x4_pred_mode[x264_scan8[i]]]++;
1898             }
1899         }
1900
1901         x264_ratecontrol_mb( h, mb_size );
1902
1903         if( h->sh.b_mbaff )
1904         {
1905             i_mb_x += i_mb_y & 1;
1906             i_mb_y ^= i_mb_x < h->sps->i_mb_width;
1907         }
1908         else
1909             i_mb_x++;
1910         if( i_mb_x == h->sps->i_mb_width )
1911         {
1912             i_mb_y++;
1913             i_mb_x = 0;
1914         }
1915     }
1916
1917     if( h->param.b_cabac )
1918     {
1919         x264_cabac_encode_flush( h, &h->cabac );
1920         h->out.bs.p = h->cabac.p;
1921     }
1922     else
1923     {
1924         if( i_skip > 0 )
1925             bs_write_ue( &h->out.bs, i_skip );  /* last skip run */
1926         /* rbsp_slice_trailing_bits */
1927         bs_rbsp_trailing( &h->out.bs );
1928         bs_flush( &h->out.bs );
1929     }
1930     if( x264_nal_end( h ) )
1931         return -1;
1932
1933     if( h->sh.i_last_mb == h->mb.i_mb_count-1 )
1934     {
1935         h->stat.frame.i_misc_bits = bs_pos( &h->out.bs )
1936                                   + (h->out.i_nal*NALU_OVERHEAD * 8)
1937                                   - h->stat.frame.i_tex_bits
1938                                   - h->stat.frame.i_mv_bits;
1939         if( !h->param.b_sliced_threads )
1940             x264_fdec_filter_row( h, h->sps->i_mb_height );
1941     }
1942
1943     return 0;
1944 }
1945
1946 static void x264_thread_sync_context( x264_t *dst, x264_t *src )
1947 {
1948     if( dst == src )
1949         return;
1950
1951     // reference counting
1952     x264_frame_t **f;
1953     for( f = src->frames.reference; *f; f++ )
1954         (*f)->i_reference_count++;
1955     for( f = dst->frames.reference; *f; f++ )
1956         x264_frame_push_unused( src, *f );
1957     src->fdec->i_reference_count++;
1958     x264_frame_push_unused( src, dst->fdec );
1959
1960     // copy everything except the per-thread pointers and the constants.
1961     memcpy( &dst->i_frame, &src->i_frame, offsetof(x264_t, mb.type) - offsetof(x264_t, i_frame) );
1962     dst->param = src->param;
1963     dst->stat = src->stat;
1964 }
1965
1966 static void x264_thread_sync_stat( x264_t *dst, x264_t *src )
1967 {
1968     if( dst == src )
1969         return;
1970     memcpy( &dst->stat.i_frame_count, &src->stat.i_frame_count, sizeof(dst->stat) - sizeof(dst->stat.frame) );
1971 }
1972
1973 static void *x264_slices_write( x264_t *h )
1974 {
1975     int i_slice_num = 0;
1976     int last_thread_mb = h->sh.i_last_mb;
1977     if( h->param.i_sync_lookahead )
1978         x264_lower_thread_priority( 10 );
1979
1980 #ifdef HAVE_MMX
1981     /* Misalign mask has to be set separately for each thread. */
1982     if( h->param.cpu&X264_CPU_SSE_MISALIGN )
1983         x264_cpu_mask_misalign_sse();
1984 #endif
1985
1986 #ifdef HAVE_VISUALIZE
1987     if( h->param.b_visualize )
1988         if( x264_visualize_init( h ) )
1989             return (void *)-1;
1990 #endif
1991
1992     /* init stats */
1993     memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
1994     h->mb.b_reencode_mb = 0;
1995     while( h->sh.i_first_mb <= last_thread_mb )
1996     {
1997         h->sh.i_last_mb = last_thread_mb;
1998         if( h->param.i_slice_max_mbs )
1999             h->sh.i_last_mb = h->sh.i_first_mb + h->param.i_slice_max_mbs - 1;
2000         else if( h->param.i_slice_count && !h->param.b_sliced_threads )
2001         {
2002             int height = h->sps->i_mb_height >> h->param.b_interlaced;
2003             int width = h->sps->i_mb_width << h->param.b_interlaced;
2004             i_slice_num++;
2005             h->sh.i_last_mb = (height * i_slice_num + h->param.i_slice_count/2) / h->param.i_slice_count * width - 1;
2006         }
2007         h->sh.i_last_mb = X264_MIN( h->sh.i_last_mb, last_thread_mb );
2008         if( x264_stack_align( x264_slice_write, h ) )
2009             return (void *)-1;
2010         h->sh.i_first_mb = h->sh.i_last_mb + 1;
2011     }
2012
2013 #ifdef HAVE_VISUALIZE
2014     if( h->param.b_visualize )
2015     {
2016         x264_visualize_show( h );
2017         x264_visualize_close( h );
2018     }
2019 #endif
2020
2021     return (void *)0;
2022 }
2023
2024 static int x264_threaded_slices_write( x264_t *h )
2025 {
2026     int i, j;
2027     void *ret = NULL;
2028     /* set first/last mb and sync contexts */
2029     for( i = 0; i < h->param.i_threads; i++ )
2030     {
2031         x264_t *t = h->thread[i];
2032         if( i )
2033         {
2034             t->param = h->param;
2035             memcpy( &t->i_frame, &h->i_frame, offsetof(x264_t, rc) - offsetof(x264_t, i_frame) );
2036         }
2037         int height = h->sps->i_mb_height >> h->param.b_interlaced;
2038         t->i_threadslice_start = ((height *  i    + h->param.i_slice_count/2) / h->param.i_threads) << h->param.b_interlaced;
2039         t->i_threadslice_end   = ((height * (i+1) + h->param.i_slice_count/2) / h->param.i_threads) << h->param.b_interlaced;
2040         t->sh.i_first_mb = t->i_threadslice_start * h->sps->i_mb_width;
2041         t->sh.i_last_mb  =   t->i_threadslice_end * h->sps->i_mb_width - 1;
2042     }
2043
2044     x264_analyse_weight_frame( h, h->sps->i_mb_height*16 + 16 );
2045
2046     x264_threads_distribute_ratecontrol( h );
2047
2048     /* dispatch */
2049     for( i = 0; i < h->param.i_threads; i++ )
2050     {
2051         if( x264_pthread_create( &h->thread[i]->thread_handle, NULL, (void*)x264_slices_write, (void*)h->thread[i] ) )
2052             return -1;
2053         h->thread[i]->b_thread_active = 1;
2054     }
2055     for( i = 0; i < h->param.i_threads; i++ )
2056     {
2057         x264_pthread_join( h->thread[i]->thread_handle, &ret );
2058         h->thread[i]->b_thread_active = 0;
2059         if( (intptr_t)ret )
2060             return (intptr_t)ret;
2061     }
2062
2063     /* deblocking and hpel filtering */
2064     for( i = 0; i <= h->sps->i_mb_height; i++ )
2065         x264_fdec_filter_row( h, i );
2066
2067     x264_threads_merge_ratecontrol( h );
2068
2069     for( i = 1; i < h->param.i_threads; i++ )
2070     {
2071         x264_t *t = h->thread[i];
2072         for( j = 0; j < t->out.i_nal; j++ )
2073         {
2074             h->out.nal[h->out.i_nal] = t->out.nal[j];
2075             h->out.i_nal++;
2076             x264_nal_check_buffer( h );
2077         }
2078         /* All entries in stat.frame are ints except for ssd/ssim,
2079          * which are only calculated in the main thread. */
2080         for( j = 0; j < (offsetof(x264_t,stat.frame.i_ssd) - offsetof(x264_t,stat.frame.i_mv_bits)) / sizeof(int); j++ )
2081             ((int*)&h->stat.frame)[j] += ((int*)&t->stat.frame)[j];
2082     }
2083
2084     return 0;
2085 }
2086
2087 /****************************************************************************
2088  * x264_encoder_encode:
2089  *  XXX: i_poc   : is the poc of the current given picture
2090  *       i_frame : is the number of the frame being coded
2091  *  ex:  type frame poc
2092  *       I      0   2*0
2093  *       P      1   2*3
2094  *       B      2   2*1
2095  *       B      3   2*2
2096  *       P      4   2*6
2097  *       B      5   2*4
2098  *       B      6   2*5
2099  ****************************************************************************/
2100 int     x264_encoder_encode( x264_t *h,
2101                              x264_nal_t **pp_nal, int *pi_nal,
2102                              x264_picture_t *pic_in,
2103                              x264_picture_t *pic_out )
2104 {
2105     x264_t *thread_current, *thread_prev, *thread_oldest;
2106     int i_nal_type, i_nal_ref_idc, i_global_qp, i;
2107
2108     if( h->i_thread_frames > 1 )
2109     {
2110         thread_prev    = h->thread[ h->i_thread_phase ];
2111         h->i_thread_phase = (h->i_thread_phase + 1) % h->i_thread_frames;
2112         thread_current = h->thread[ h->i_thread_phase ];
2113         thread_oldest  = h->thread[ (h->i_thread_phase + 1) % h->i_thread_frames ];
2114         x264_thread_sync_context( thread_current, thread_prev );
2115         x264_thread_sync_ratecontrol( thread_current, thread_prev, thread_oldest );
2116         h = thread_current;
2117 //      fprintf(stderr, "current: %p  prev: %p  oldest: %p \n", thread_current, thread_prev, thread_oldest);
2118     }
2119     else
2120     {
2121         thread_current =
2122         thread_oldest  = h;
2123     }
2124
2125     // ok to call this before encoding any frames, since the initial values of fdec have b_kept_as_ref=0
2126     if( x264_reference_update( h ) )
2127         return -1;
2128     h->fdec->i_lines_completed = -1;
2129
2130     /* no data out */
2131     *pi_nal = 0;
2132     *pp_nal = NULL;
2133
2134     /* ------------------- Setup new frame from picture -------------------- */
2135     if( pic_in != NULL )
2136     {
2137         /* 1: Copy the picture to a frame and move it to a buffer */
2138         x264_frame_t *fenc = x264_frame_pop_unused( h, 0 );
2139         if( !fenc )
2140             return -1;
2141
2142         if( x264_frame_copy_picture( h, fenc, pic_in ) < 0 )
2143             return -1;
2144
2145         if( h->param.i_width != 16 * h->sps->i_mb_width ||
2146             h->param.i_height != 16 * h->sps->i_mb_height )
2147             x264_frame_expand_border_mod16( h, fenc );
2148
2149         fenc->i_frame = h->frames.i_input++;
2150
2151         if( h->frames.i_bframe_delay && fenc->i_frame == h->frames.i_bframe_delay )
2152             h->frames.i_bframe_delay_time = fenc->i_pts;
2153
2154         if( h->frames.b_have_lowres )
2155         {
2156             if( h->param.analyse.i_weighted_pred == X264_WEIGHTP_FAKE || h->param.analyse.i_weighted_pred == X264_WEIGHTP_SMART )
2157                 x264_weight_plane_analyse( h, fenc );
2158             x264_frame_init_lowres( h, fenc );
2159         }
2160
2161         if( h->param.rc.b_mb_tree && h->param.rc.b_stat_read )
2162         {
2163             if( x264_macroblock_tree_read( h, fenc ) )
2164                 return -1;
2165         }
2166         else if( h->param.rc.i_aq_mode )
2167             x264_adaptive_quant_frame( h, fenc );
2168
2169         /* 2: Place the frame into the queue for its slice type decision */
2170         x264_lookahead_put_frame( h, fenc );
2171
2172         if( h->frames.i_input <= h->frames.i_delay + 1 - h->i_thread_frames )
2173         {
2174             /* Nothing yet to encode, waiting for filling of buffers */
2175             pic_out->i_type = X264_TYPE_AUTO;
2176             return 0;
2177         }
2178     }
2179     else
2180     {
2181         /* signal kills for lookahead thread */
2182         x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
2183         h->lookahead->b_exit_thread = 1;
2184         x264_pthread_cond_broadcast( &h->lookahead->ifbuf.cv_fill );
2185         x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
2186     }
2187
2188     h->i_frame++;
2189     /* 3: The picture is analyzed in the lookahead */
2190     if( !h->frames.current[0] )
2191         x264_lookahead_get_frames( h );
2192
2193     if( !h->frames.current[0] && x264_lookahead_is_empty( h ) )
2194         return x264_encoder_frame_end( thread_oldest, thread_current, pp_nal, pi_nal, pic_out );
2195
2196     /* ------------------- Get frame to be encoded ------------------------- */
2197     /* 4: get picture to encode */
2198     h->fenc = x264_frame_shift( h->frames.current );
2199     if( h->fenc->param )
2200     {
2201         x264_encoder_reconfig( h, h->fenc->param );
2202         if( h->fenc->param->param_free )
2203             h->fenc->param->param_free( h->fenc->param );
2204     }
2205
2206     if( h->fenc->b_keyframe )
2207     {
2208         h->frames.i_last_keyframe = h->fenc->i_frame;
2209         if( h->fenc->i_type == X264_TYPE_IDR )
2210             h->i_frame_num = 0;
2211     }
2212     h->sh.i_mmco_command_count =
2213     h->sh.i_mmco_remove_from_end = 0;
2214     h->b_ref_reorder[0] =
2215     h->b_ref_reorder[1] = 0;
2216
2217     /* ------------------- Setup frame context ----------------------------- */
2218     /* 5: Init data dependent of frame type */
2219     if( h->fenc->i_type == X264_TYPE_IDR )
2220     {
2221         /* reset ref pictures */
2222         i_nal_type    = NAL_SLICE_IDR;
2223         i_nal_ref_idc = NAL_PRIORITY_HIGHEST;
2224         h->sh.i_type = SLICE_TYPE_I;
2225         x264_reference_reset( h );
2226     }
2227     else if( h->fenc->i_type == X264_TYPE_I )
2228     {
2229         i_nal_type    = NAL_SLICE;
2230         i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
2231         h->sh.i_type = SLICE_TYPE_I;
2232         x264_reference_hierarchy_reset( h );
2233     }
2234     else if( h->fenc->i_type == X264_TYPE_P )
2235     {
2236         i_nal_type    = NAL_SLICE;
2237         i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
2238         h->sh.i_type = SLICE_TYPE_P;
2239         x264_reference_hierarchy_reset( h );
2240     }
2241     else if( h->fenc->i_type == X264_TYPE_BREF )
2242     {
2243         i_nal_type    = NAL_SLICE;
2244         i_nal_ref_idc = h->param.i_bframe_pyramid == X264_B_PYRAMID_STRICT ? NAL_PRIORITY_LOW : NAL_PRIORITY_HIGH;
2245         h->sh.i_type = SLICE_TYPE_B;
2246         x264_reference_hierarchy_reset( h );
2247     }
2248     else    /* B frame */
2249     {
2250         i_nal_type    = NAL_SLICE;
2251         i_nal_ref_idc = NAL_PRIORITY_DISPOSABLE;
2252         h->sh.i_type = SLICE_TYPE_B;
2253     }
2254
2255     h->fdec->i_poc =
2256     h->fenc->i_poc = 2 * (h->fenc->i_frame - h->frames.i_last_keyframe);
2257     h->fdec->i_type = h->fenc->i_type;
2258     h->fdec->i_frame = h->fenc->i_frame;
2259     h->fenc->b_kept_as_ref =
2260     h->fdec->b_kept_as_ref = i_nal_ref_idc != NAL_PRIORITY_DISPOSABLE && h->param.i_keyint_max > 1;
2261
2262
2263
2264     /* ------------------- Init                ----------------------------- */
2265     /* build ref list 0/1 */
2266     x264_reference_build_list( h, h->fdec->i_poc );
2267
2268     /* ---------------------- Write the bitstream -------------------------- */
2269     /* Init bitstream context */
2270     if( h->param.b_sliced_threads )
2271     {
2272         for( i = 0; i < h->param.i_threads; i++ )
2273         {
2274             bs_init( &h->thread[i]->out.bs, h->thread[i]->out.p_bitstream, h->thread[i]->out.i_bitstream );
2275             h->thread[i]->out.i_nal = 0;
2276         }
2277     }
2278     else
2279     {
2280         bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );
2281         h->out.i_nal = 0;
2282     }
2283
2284     if( h->param.b_aud )
2285     {
2286         int pic_type;
2287
2288         if( h->sh.i_type == SLICE_TYPE_I )
2289             pic_type = 0;
2290         else if( h->sh.i_type == SLICE_TYPE_P )
2291             pic_type = 1;
2292         else if( h->sh.i_type == SLICE_TYPE_B )
2293             pic_type = 2;
2294         else
2295             pic_type = 7;
2296
2297         x264_nal_start( h, NAL_AUD, NAL_PRIORITY_DISPOSABLE );
2298         bs_write( &h->out.bs, 3, pic_type );
2299         bs_rbsp_trailing( &h->out.bs );
2300         if( x264_nal_end( h ) )
2301             return -1;
2302     }
2303
2304     h->i_nal_type = i_nal_type;
2305     h->i_nal_ref_idc = i_nal_ref_idc;
2306
2307     int overhead = NALU_OVERHEAD;
2308
2309     if( h->param.b_intra_refresh && h->fenc->i_type == X264_TYPE_P )
2310     {
2311         int pocdiff = (h->fdec->i_poc - h->fref0[0]->i_poc)/2;
2312         float increment = X264_MAX( ((float)h->sps->i_mb_width-1) / h->param.i_keyint_max, 1 );
2313         int max_position = (int)(increment * h->param.i_keyint_max);
2314         if( IS_X264_TYPE_I( h->fref0[0]->i_type ) )
2315             h->fdec->f_pir_position = 0;
2316         else
2317         {
2318             h->fdec->f_pir_position = h->fref0[0]->f_pir_position;
2319             if( h->fdec->f_pir_position+0.5 >= max_position )
2320             {
2321                 h->fdec->f_pir_position = 0;
2322                 h->fenc->b_keyframe = 1;
2323             }
2324         }
2325         h->fdec->i_pir_start_col = h->fdec->f_pir_position+0.5;
2326         h->fdec->f_pir_position += increment * pocdiff;
2327         h->fdec->i_pir_end_col = h->fdec->f_pir_position+0.5;
2328     }
2329
2330     /* Write SPS and PPS */
2331     if( h->fenc->b_keyframe )
2332     {
2333         if( h->param.b_repeat_headers )
2334         {
2335             if( h->fenc->i_frame == 0 )
2336             {
2337                 /* identify ourself */
2338                 x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
2339                 if( x264_sei_version_write( h, &h->out.bs ) )
2340                     return -1;
2341                 if( x264_nal_end( h ) )
2342                     return -1;
2343                 overhead += h->out.nal[h->out.i_nal-1].i_payload + NALU_OVERHEAD;
2344             }
2345
2346             /* generate sequence parameters */
2347             x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
2348             x264_sps_write( &h->out.bs, h->sps );
2349             if( x264_nal_end( h ) )
2350                 return -1;
2351             overhead += h->out.nal[h->out.i_nal-1].i_payload + NALU_OVERHEAD;
2352
2353             /* generate picture parameters */
2354             x264_nal_start( h, NAL_PPS, NAL_PRIORITY_HIGHEST );
2355             x264_pps_write( &h->out.bs, h->pps );
2356             if( x264_nal_end( h ) )
2357                 return -1;
2358             overhead += h->out.nal[h->out.i_nal-1].i_payload + NALU_OVERHEAD;
2359         }
2360
2361         if( h->fenc->i_type != X264_TYPE_IDR )
2362         {
2363             int time_to_recovery = X264_MIN( h->sps->i_mb_width - 1, h->param.i_keyint_max ) + h->param.i_bframe;
2364             x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
2365             x264_sei_recovery_point_write( h, &h->out.bs, time_to_recovery );
2366             x264_nal_end( h );
2367             overhead += h->out.nal[h->out.i_nal-1].i_payload + NALU_OVERHEAD;
2368         }
2369     }
2370
2371     /* Init the rate control */
2372     /* FIXME: Include slice header bit cost. */
2373     x264_ratecontrol_start( h, h->fenc->i_qpplus1, overhead*8 );
2374     i_global_qp = x264_ratecontrol_qp( h );
2375
2376     pic_out->i_qpplus1 =
2377     h->fdec->i_qpplus1 = i_global_qp + 1;
2378
2379     if( h->param.rc.b_stat_read && h->sh.i_type != SLICE_TYPE_I )
2380     {
2381         x264_reference_build_list_optimal( h );
2382         x264_reference_check_reorder( h );
2383     }
2384
2385     if( h->i_ref0 )
2386         h->fdec->i_poc_l0ref0 = h->fref0[0]->i_poc;
2387
2388     if( h->sh.i_type == SLICE_TYPE_B )
2389         x264_macroblock_bipred_init( h );
2390
2391     /*------------------------- Weights -------------------------------------*/
2392     x264_weighted_pred_init( h );
2393
2394     /* ------------------------ Create slice header  ----------------------- */
2395     x264_slice_init( h, i_nal_type, i_global_qp );
2396
2397     if( i_nal_ref_idc != NAL_PRIORITY_DISPOSABLE )
2398         h->i_frame_num++;
2399
2400     /* Write frame */
2401     h->i_threadslice_start = 0;
2402     h->i_threadslice_end = h->sps->i_mb_height;
2403     if( h->i_thread_frames > 1 )
2404     {
2405         if( x264_pthread_create( &h->thread_handle, NULL, (void*)x264_slices_write, h ) )
2406             return -1;
2407         h->b_thread_active = 1;
2408     }
2409     else if( h->param.b_sliced_threads )
2410     {
2411         if( x264_threaded_slices_write( h ) )
2412             return -1;
2413     }
2414     else
2415         if( (intptr_t)x264_slices_write( h ) )
2416             return -1;
2417
2418     return x264_encoder_frame_end( thread_oldest, thread_current, pp_nal, pi_nal, pic_out );
2419 }
2420
2421 static int x264_encoder_frame_end( x264_t *h, x264_t *thread_current,
2422                                    x264_nal_t **pp_nal, int *pi_nal,
2423                                    x264_picture_t *pic_out )
2424 {
2425     int i, j, i_list, frame_size;
2426     char psz_message[80];
2427
2428     if( h->b_thread_active )
2429     {
2430         void *ret = NULL;
2431         x264_pthread_join( h->thread_handle, &ret );
2432         h->b_thread_active = 0;
2433         if( (intptr_t)ret )
2434             return (intptr_t)ret;
2435     }
2436     if( !h->out.i_nal )
2437     {
2438         pic_out->i_type = X264_TYPE_AUTO;
2439         return 0;
2440     }
2441
2442     x264_frame_push_unused( thread_current, h->fenc );
2443
2444     /* End bitstream, set output  */
2445     *pi_nal = h->out.i_nal;
2446     *pp_nal = h->out.nal;
2447
2448     frame_size = x264_encoder_encapsulate_nals( h );
2449
2450     h->out.i_nal = 0;
2451
2452     /* Set output picture properties */
2453     if( h->sh.i_type == SLICE_TYPE_I )
2454         pic_out->i_type = h->i_nal_type == NAL_SLICE_IDR ? X264_TYPE_IDR : X264_TYPE_I;
2455     else if( h->sh.i_type == SLICE_TYPE_P )
2456         pic_out->i_type = X264_TYPE_P;
2457     else
2458         pic_out->i_type = X264_TYPE_B;
2459
2460     pic_out->b_keyframe = h->fenc->b_keyframe;
2461
2462     pic_out->i_pts = h->fenc->i_pts *= h->i_dts_compress_multiplier;
2463     if( h->frames.i_bframe_delay )
2464     {
2465         int64_t *i_prev_dts = thread_current->frames.i_prev_dts;
2466         if( h->i_frame <= h->frames.i_bframe_delay )
2467         {
2468             if( h->i_dts_compress_multiplier == 1 )
2469                 pic_out->i_dts = h->fenc->i_reordered_pts - h->frames.i_bframe_delay_time;
2470             else
2471             {
2472                 /* DTS compression */
2473                 if( h->i_frame == 1 )
2474                     thread_current->frames.i_init_delta = h->fenc->i_reordered_pts * h->i_dts_compress_multiplier;
2475                 pic_out->i_dts = h->i_frame * thread_current->frames.i_init_delta / h->i_dts_compress_multiplier;
2476             }
2477         }
2478         else
2479             pic_out->i_dts = i_prev_dts[ (h->i_frame - h->frames.i_bframe_delay) % h->frames.i_bframe_delay ];
2480         i_prev_dts[ h->i_frame % h->frames.i_bframe_delay ] = h->fenc->i_reordered_pts * h->i_dts_compress_multiplier;
2481     }
2482     else
2483         pic_out->i_dts = h->fenc->i_reordered_pts;
2484     assert( pic_out->i_pts >= pic_out->i_dts );
2485
2486     pic_out->img.i_plane = h->fdec->i_plane;
2487     for(i = 0; i < 3; i++)
2488     {
2489         pic_out->img.i_stride[i] = h->fdec->i_stride[i];
2490         pic_out->img.plane[i] = h->fdec->plane[i];
2491     }
2492
2493     /* ---------------------- Update encoder state ------------------------- */
2494
2495     /* update rc */
2496     x264_emms();
2497     if( x264_ratecontrol_end( h, frame_size * 8 ) < 0 )
2498         return -1;
2499
2500     x264_noise_reduction_update( thread_current );
2501
2502     /* ---------------------- Compute/Print statistics --------------------- */
2503     x264_thread_sync_stat( h, h->thread[0] );
2504
2505     /* Slice stat */
2506     h->stat.i_frame_count[h->sh.i_type]++;
2507     h->stat.i_frame_size[h->sh.i_type] += frame_size;
2508     h->stat.f_frame_qp[h->sh.i_type] += h->fdec->f_qp_avg_aq;
2509
2510     for( i = 0; i < X264_MBTYPE_MAX; i++ )
2511         h->stat.i_mb_count[h->sh.i_type][i] += h->stat.frame.i_mb_count[i];
2512     for( i = 0; i < X264_PARTTYPE_MAX; i++ )
2513         h->stat.i_mb_partition[h->sh.i_type][i] += h->stat.frame.i_mb_partition[i];
2514     for( i = 0; i < 2; i++ )
2515         h->stat.i_mb_count_8x8dct[i] += h->stat.frame.i_mb_count_8x8dct[i];
2516     for( i = 0; i < 6; i++ )
2517         h->stat.i_mb_cbp[i] += h->stat.frame.i_mb_cbp[i];
2518     for( i = 0; i < 3; i++ )
2519         for( j = 0; j < 13; j++ )
2520             h->stat.i_mb_pred_mode[i][j] += h->stat.frame.i_mb_pred_mode[i][j];
2521     if( h->sh.i_type != SLICE_TYPE_I )
2522         for( i_list = 0; i_list < 2; i_list++ )
2523             for( i = 0; i < 32; i++ )
2524                 h->stat.i_mb_count_ref[h->sh.i_type][i_list][i] += h->stat.frame.i_mb_count_ref[i_list][i];
2525     if( h->sh.i_type == SLICE_TYPE_P )
2526     {
2527         h->stat.i_consecutive_bframes[h->fdec->i_frame - h->fref0[0]->i_frame - 1]++;
2528         if( h->param.analyse.i_weighted_pred == X264_WEIGHTP_SMART )
2529         {
2530             for( i = 0; i < 3; i++ )
2531                 for( j = 0; j < h->i_ref0; j++ )
2532                     if( h->sh.weight[0][i].i_denom != 0 )
2533                     {
2534                         h->stat.i_wpred[i]++;
2535                         break;
2536                     }
2537         }
2538     }
2539     if( h->sh.i_type == SLICE_TYPE_B )
2540     {
2541         h->stat.i_direct_frames[ h->sh.b_direct_spatial_mv_pred ] ++;
2542         if( h->mb.b_direct_auto_write )
2543         {
2544             //FIXME somewhat arbitrary time constants
2545             if( h->stat.i_direct_score[0] + h->stat.i_direct_score[1] > h->mb.i_mb_count )
2546             {
2547                 for( i = 0; i < 2; i++ )
2548                     h->stat.i_direct_score[i] = h->stat.i_direct_score[i] * 9/10;
2549             }
2550             for( i = 0; i < 2; i++ )
2551                 h->stat.i_direct_score[i] += h->stat.frame.i_direct_score[i];
2552         }
2553     }
2554
2555     psz_message[0] = '\0';
2556     if( h->param.analyse.b_psnr )
2557     {
2558         int64_t ssd[3] = {
2559             h->stat.frame.i_ssd[0],
2560             h->stat.frame.i_ssd[1],
2561             h->stat.frame.i_ssd[2],
2562         };
2563
2564         h->stat.i_ssd_global[h->sh.i_type] += ssd[0] + ssd[1] + ssd[2];
2565         h->stat.f_psnr_average[h->sh.i_type] += x264_psnr( ssd[0] + ssd[1] + ssd[2], 3 * h->param.i_width * h->param.i_height / 2 );
2566         h->stat.f_psnr_mean_y[h->sh.i_type] += x264_psnr( ssd[0], h->param.i_width * h->param.i_height );
2567         h->stat.f_psnr_mean_u[h->sh.i_type] += x264_psnr( ssd[1], h->param.i_width * h->param.i_height / 4 );
2568         h->stat.f_psnr_mean_v[h->sh.i_type] += x264_psnr( ssd[2], h->param.i_width * h->param.i_height / 4 );
2569
2570         snprintf( psz_message, 80, " PSNR Y:%5.2f U:%5.2f V:%5.2f",
2571                   x264_psnr( ssd[0], h->param.i_width * h->param.i_height ),
2572                   x264_psnr( ssd[1], h->param.i_width * h->param.i_height / 4),
2573                   x264_psnr( ssd[2], h->param.i_width * h->param.i_height / 4) );
2574     }
2575
2576     if( h->param.analyse.b_ssim )
2577     {
2578         double ssim_y = h->stat.frame.f_ssim
2579                       / (((h->param.i_width-6)>>2) * ((h->param.i_height-6)>>2));
2580         h->stat.f_ssim_mean_y[h->sh.i_type] += ssim_y;
2581         snprintf( psz_message + strlen(psz_message), 80 - strlen(psz_message),
2582                   " SSIM Y:%.5f", ssim_y );
2583     }
2584     psz_message[79] = '\0';
2585
2586     x264_log( h, X264_LOG_DEBUG,
2587                   "frame=%4d QP=%.2f NAL=%d Slice:%c Poc:%-3d I:%-4d P:%-4d SKIP:%-4d size=%d bytes%s\n",
2588               h->i_frame,
2589               h->fdec->f_qp_avg_aq,
2590               h->i_nal_ref_idc,
2591               h->sh.i_type == SLICE_TYPE_I ? 'I' : (h->sh.i_type == SLICE_TYPE_P ? 'P' : 'B' ),
2592               h->fdec->i_poc,
2593               h->stat.frame.i_mb_count_i,
2594               h->stat.frame.i_mb_count_p,
2595               h->stat.frame.i_mb_count_skip,
2596               frame_size,
2597               psz_message );
2598
2599     // keep stats all in one place
2600     x264_thread_sync_stat( h->thread[0], h );
2601     // for the use of the next frame
2602     x264_thread_sync_stat( thread_current, h );
2603
2604 #ifdef DEBUG_MB_TYPE
2605 {
2606     static const char mb_chars[] = { 'i', 'i', 'I', 'C', 'P', '8', 'S',
2607         'D', '<', 'X', 'B', 'X', '>', 'B', 'B', 'B', 'B', '8', 'S' };
2608     int mb_xy;
2609     for( mb_xy = 0; mb_xy < h->sps->i_mb_width * h->sps->i_mb_height; mb_xy++ )
2610     {
2611         if( h->mb.type[mb_xy] < X264_MBTYPE_MAX && h->mb.type[mb_xy] >= 0 )
2612             fprintf( stderr, "%c ", mb_chars[ h->mb.type[mb_xy] ] );
2613         else
2614             fprintf( stderr, "? " );
2615
2616         if( (mb_xy+1) % h->sps->i_mb_width == 0 )
2617             fprintf( stderr, "\n" );
2618     }
2619 }
2620 #endif
2621
2622     /* Remove duplicates, must be done near the end as breaks h->fref0 array
2623      * by freeing some of its pointers. */
2624      for( i = 0; i < h->i_ref0; i++ )
2625          if( h->fref0[i] && h->fref0[i]->b_duplicate )
2626          {
2627              x264_frame_push_blank_unused( h, h->fref0[i] );
2628              h->fref0[i] = 0;
2629          }
2630
2631     if( h->param.psz_dump_yuv )
2632         x264_frame_dump( h );
2633
2634     return frame_size;
2635 }
2636
2637 static void x264_print_intra( int64_t *i_mb_count, double i_count, int b_print_pcm, char *intra )
2638 {
2639     intra += sprintf( intra, "I16..4%s: %4.1f%% %4.1f%% %4.1f%%",
2640         b_print_pcm ? "..PCM" : "",
2641         i_mb_count[I_16x16]/ i_count,
2642         i_mb_count[I_8x8]  / i_count,
2643         i_mb_count[I_4x4]  / i_count );
2644     if( b_print_pcm )
2645         sprintf( intra, " %4.1f%%", i_mb_count[I_PCM]  / i_count );
2646 }
2647
2648 /****************************************************************************
2649  * x264_encoder_close:
2650  ****************************************************************************/
2651 void    x264_encoder_close  ( x264_t *h )
2652 {
2653     int64_t i_yuv_size = 3 * h->param.i_width * h->param.i_height / 2;
2654     int64_t i_mb_count_size[2][7] = {{0}};
2655     char buf[200];
2656     int i, j, i_list, i_type;
2657     int b_print_pcm = h->stat.i_mb_count[SLICE_TYPE_I][I_PCM]
2658                    || h->stat.i_mb_count[SLICE_TYPE_P][I_PCM]
2659                    || h->stat.i_mb_count[SLICE_TYPE_B][I_PCM];
2660
2661     x264_lookahead_delete( h );
2662
2663     if( h->param.i_threads > 1 )
2664     {
2665         // don't strictly have to wait for the other threads, but it's simpler than canceling them
2666         for( i = 0; i < h->param.i_threads; i++ )
2667             if( h->thread[i]->b_thread_active )
2668                 x264_pthread_join( h->thread[i]->thread_handle, NULL );
2669         if( h->i_thread_frames > 1 )
2670         {
2671             for( i = 0; i < h->i_thread_frames; i++ )
2672             {
2673                 if( h->thread[i]->b_thread_active )
2674                 {
2675                     assert( h->thread[i]->fenc->i_reference_count == 1 );
2676                     x264_frame_delete( h->thread[i]->fenc );
2677                 }
2678             }
2679
2680             x264_t *thread_prev = h->thread[h->i_thread_phase];
2681             x264_thread_sync_ratecontrol( h, thread_prev, h );
2682             x264_thread_sync_ratecontrol( thread_prev, thread_prev, h );
2683             h->i_frame = thread_prev->i_frame + 1 - h->i_thread_frames;
2684         }
2685     }
2686     h->i_frame++;
2687
2688     /* Slices used and PSNR */
2689     for( i=0; i<5; i++ )
2690     {
2691         static const int slice_order[] = { SLICE_TYPE_I, SLICE_TYPE_SI, SLICE_TYPE_P, SLICE_TYPE_SP, SLICE_TYPE_B };
2692         static const char *slice_name[] = { "P", "B", "I", "SP", "SI" };
2693         int i_slice = slice_order[i];
2694
2695         if( h->stat.i_frame_count[i_slice] > 0 )
2696         {
2697             const int i_count = h->stat.i_frame_count[i_slice];
2698             if( h->param.analyse.b_psnr )
2699             {
2700                 x264_log( h, X264_LOG_INFO,
2701                           "frame %s:%-5d Avg QP:%5.2f  size:%6.0f  PSNR Mean Y:%5.2f U:%5.2f V:%5.2f Avg:%5.2f Global:%5.2f\n",
2702                           slice_name[i_slice],
2703                           i_count,
2704                           h->stat.f_frame_qp[i_slice] / i_count,
2705                           (double)h->stat.i_frame_size[i_slice] / i_count,
2706                           h->stat.f_psnr_mean_y[i_slice] / i_count, h->stat.f_psnr_mean_u[i_slice] / i_count, h->stat.f_psnr_mean_v[i_slice] / i_count,
2707                           h->stat.f_psnr_average[i_slice] / i_count,
2708                           x264_psnr( h->stat.i_ssd_global[i_slice], i_count * i_yuv_size ) );
2709             }
2710             else
2711             {
2712                 x264_log( h, X264_LOG_INFO,
2713                           "frame %s:%-5d Avg QP:%5.2f  size:%6.0f\n",
2714                           slice_name[i_slice],
2715                           i_count,
2716                           h->stat.f_frame_qp[i_slice] / i_count,
2717                           (double)h->stat.i_frame_size[i_slice] / i_count );
2718             }
2719         }
2720     }
2721     if( h->param.i_bframe && h->stat.i_frame_count[SLICE_TYPE_P] )
2722     {
2723         char *p = buf;
2724         int den = 0;
2725         // weight by number of frames (including the P-frame) that are in a sequence of N B-frames
2726         for( i=0; i<=h->param.i_bframe; i++ )
2727             den += (i+1) * h->stat.i_consecutive_bframes[i];
2728         for( i=0; i<=h->param.i_bframe; i++ )
2729             p += sprintf( p, " %4.1f%%", 100. * (i+1) * h->stat.i_consecutive_bframes[i] / den );
2730         x264_log( h, X264_LOG_INFO, "consecutive B-frames:%s\n", buf );
2731     }
2732
2733     for( i_type = 0; i_type < 2; i_type++ )
2734         for( i = 0; i < X264_PARTTYPE_MAX; i++ )
2735         {
2736             if( i == D_DIRECT_8x8 ) continue; /* direct is counted as its own type */
2737             i_mb_count_size[i_type][x264_mb_partition_pixel_table[i]] += h->stat.i_mb_partition[i_type][i];
2738         }
2739
2740     /* MB types used */
2741     if( h->stat.i_frame_count[SLICE_TYPE_I] > 0 )
2742     {
2743         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_I];
2744         double i_count = h->stat.i_frame_count[SLICE_TYPE_I] * h->mb.i_mb_count / 100.0;
2745         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
2746         x264_log( h, X264_LOG_INFO, "mb I  %s\n", buf );
2747     }
2748     if( h->stat.i_frame_count[SLICE_TYPE_P] > 0 )
2749     {
2750         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_P];
2751         double i_count = h->stat.i_frame_count[SLICE_TYPE_P] * h->mb.i_mb_count / 100.0;
2752         int64_t *i_mb_size = i_mb_count_size[SLICE_TYPE_P];
2753         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
2754         x264_log( h, X264_LOG_INFO,
2755                   "mb P  %s  P16..4: %4.1f%% %4.1f%% %4.1f%% %4.1f%% %4.1f%%    skip:%4.1f%%\n",
2756                   buf,
2757                   i_mb_size[PIXEL_16x16] / (i_count*4),
2758                   (i_mb_size[PIXEL_16x8] + i_mb_size[PIXEL_8x16]) / (i_count*4),
2759                   i_mb_size[PIXEL_8x8] / (i_count*4),
2760                   (i_mb_size[PIXEL_8x4] + i_mb_size[PIXEL_4x8]) / (i_count*4),
2761                   i_mb_size[PIXEL_4x4] / (i_count*4),
2762                   i_mb_count[P_SKIP] / i_count );
2763     }
2764     if( h->stat.i_frame_count[SLICE_TYPE_B] > 0 )
2765     {
2766         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_B];
2767         double i_count = h->stat.i_frame_count[SLICE_TYPE_B] * h->mb.i_mb_count / 100.0;
2768         double i_mb_list_count;
2769         int64_t *i_mb_size = i_mb_count_size[SLICE_TYPE_B];
2770         int64_t list_count[3] = {0}; /* 0 == L0, 1 == L1, 2 == BI */
2771         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
2772         for( i = 0; i < X264_PARTTYPE_MAX; i++ )
2773             for( j = 0; j < 2; j++ )
2774             {
2775                 int l0 = x264_mb_type_list_table[i][0][j];
2776                 int l1 = x264_mb_type_list_table[i][1][j];
2777                 if( l0 || l1 )
2778                     list_count[l1+l0*l1] += h->stat.i_mb_count[SLICE_TYPE_B][i] * 2;
2779             }
2780         list_count[0] += h->stat.i_mb_partition[SLICE_TYPE_B][D_L0_8x8];
2781         list_count[1] += h->stat.i_mb_partition[SLICE_TYPE_B][D_L1_8x8];
2782         list_count[2] += h->stat.i_mb_partition[SLICE_TYPE_B][D_BI_8x8];
2783         i_mb_count[B_DIRECT] += (h->stat.i_mb_partition[SLICE_TYPE_B][D_DIRECT_8x8]+2)/4;
2784         i_mb_list_count = (list_count[0] + list_count[1] + list_count[2]) / 100.0;
2785         x264_log( h, X264_LOG_INFO,
2786                   "mb B  %s  B16..8: %4.1f%% %4.1f%% %4.1f%%  direct:%4.1f%%  skip:%4.1f%%  L0:%4.1f%% L1:%4.1f%% BI:%4.1f%%\n",
2787                   buf,
2788                   i_mb_size[PIXEL_16x16] / (i_count*4),
2789                   (i_mb_size[PIXEL_16x8] + i_mb_size[PIXEL_8x16]) / (i_count*4),
2790                   i_mb_size[PIXEL_8x8] / (i_count*4),
2791                   i_mb_count[B_DIRECT] / i_count,
2792                   i_mb_count[B_SKIP]   / i_count,
2793                   list_count[0] / i_mb_list_count,
2794                   list_count[1] / i_mb_list_count,
2795                   list_count[2] / i_mb_list_count );
2796     }
2797
2798     x264_ratecontrol_summary( h );
2799
2800     if( h->stat.i_frame_count[SLICE_TYPE_I] + h->stat.i_frame_count[SLICE_TYPE_P] + h->stat.i_frame_count[SLICE_TYPE_B] > 0 )
2801     {
2802 #define SUM3(p) (p[SLICE_TYPE_I] + p[SLICE_TYPE_P] + p[SLICE_TYPE_B])
2803 #define SUM3b(p,o) (p[SLICE_TYPE_I][o] + p[SLICE_TYPE_P][o] + p[SLICE_TYPE_B][o])
2804         int64_t i_i8x8 = SUM3b( h->stat.i_mb_count, I_8x8 );
2805         int64_t i_intra = i_i8x8 + SUM3b( h->stat.i_mb_count, I_4x4 )
2806                                  + SUM3b( h->stat.i_mb_count, I_16x16 );
2807         int64_t i_all_intra = i_intra + SUM3b( h->stat.i_mb_count, I_PCM);
2808         const int i_count = h->stat.i_frame_count[SLICE_TYPE_I] +
2809                             h->stat.i_frame_count[SLICE_TYPE_P] +
2810                             h->stat.i_frame_count[SLICE_TYPE_B];
2811         int64_t i_mb_count = i_count * h->mb.i_mb_count;
2812         float fps = (float) h->param.i_fps_num / h->param.i_fps_den;
2813         float f_bitrate = fps * SUM3(h->stat.i_frame_size) / i_count / 125;
2814
2815         if( h->pps->b_transform_8x8_mode )
2816         {
2817             buf[0] = 0;
2818             if( h->stat.i_mb_count_8x8dct[0] )
2819                 sprintf( buf, " inter:%.1f%%", 100. * h->stat.i_mb_count_8x8dct[1] / h->stat.i_mb_count_8x8dct[0] );
2820             x264_log( h, X264_LOG_INFO, "8x8 transform intra:%.1f%%%s\n", 100. * i_i8x8 / i_intra, buf );
2821         }
2822
2823         if( (h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_AUTO ||
2824             (h->stat.i_direct_frames[0] && h->stat.i_direct_frames[1]))
2825             && h->stat.i_frame_count[SLICE_TYPE_B] )
2826         {
2827             x264_log( h, X264_LOG_INFO, "direct mvs  spatial:%.1f%% temporal:%.1f%%\n",
2828                       h->stat.i_direct_frames[1] * 100. / h->stat.i_frame_count[SLICE_TYPE_B],
2829                       h->stat.i_direct_frames[0] * 100. / h->stat.i_frame_count[SLICE_TYPE_B] );
2830         }
2831
2832         buf[0] = 0;
2833         if( i_mb_count != i_all_intra )
2834             sprintf( buf, " inter: %.1f%% %.1f%% %.1f%%",
2835                      h->stat.i_mb_cbp[1] * 100.0 / ((i_mb_count - i_all_intra)*4),
2836                      h->stat.i_mb_cbp[3] * 100.0 / ((i_mb_count - i_all_intra)  ),
2837                      h->stat.i_mb_cbp[5] * 100.0 / ((i_mb_count - i_all_intra)) );
2838         x264_log( h, X264_LOG_INFO, "coded y,uvDC,uvAC intra: %.1f%% %.1f%% %.1f%%%s\n",
2839                   h->stat.i_mb_cbp[0] * 100.0 / (i_all_intra*4),
2840                   h->stat.i_mb_cbp[2] * 100.0 / (i_all_intra  ),
2841                   h->stat.i_mb_cbp[4] * 100.0 / (i_all_intra  ), buf );
2842
2843         int64_t fixed_pred_modes[3][9] = {{0}};
2844         int64_t sum_pred_modes[3] = {0};
2845         for( i = 0; i <= I_PRED_16x16_DC_128; i++ )
2846         {
2847             fixed_pred_modes[0][x264_mb_pred_mode16x16_fix[i]] += h->stat.i_mb_pred_mode[0][i];
2848             sum_pred_modes[0] += h->stat.i_mb_pred_mode[0][i];
2849         }
2850         if( sum_pred_modes[0] )
2851             x264_log( h, X264_LOG_INFO, "i16 v,h,dc,p: %2.0f%% %2.0f%% %2.0f%% %2.0f%%\n",
2852                       fixed_pred_modes[0][0] * 100.0 / sum_pred_modes[0],
2853                       fixed_pred_modes[0][1] * 100.0 / sum_pred_modes[0],
2854                       fixed_pred_modes[0][2] * 100.0 / sum_pred_modes[0],
2855                       fixed_pred_modes[0][3] * 100.0 / sum_pred_modes[0] );
2856         for( i = 1; i <= 2; i++ )
2857         {
2858             for( j = 0; j <= I_PRED_8x8_DC_128; j++ )
2859             {
2860                 fixed_pred_modes[i][x264_mb_pred_mode4x4_fix(j)] += h->stat.i_mb_pred_mode[i][j];
2861                 sum_pred_modes[i] += h->stat.i_mb_pred_mode[i][j];
2862             }
2863             if( sum_pred_modes[i] )
2864                 x264_log( h, X264_LOG_INFO, "i%d v,h,dc,ddl,ddr,vr,hd,vl,hu: %2.0f%% %2.0f%% %2.0f%% %2.0f%% %2.0f%% %2.0f%% %2.0f%% %2.0f%% %2.0f%%\n", (3-i)*4,
2865                           fixed_pred_modes[i][0] * 100.0 / sum_pred_modes[i],
2866                           fixed_pred_modes[i][1] * 100.0 / sum_pred_modes[i],
2867                           fixed_pred_modes[i][2] * 100.0 / sum_pred_modes[i],
2868                           fixed_pred_modes[i][3] * 100.0 / sum_pred_modes[i],
2869                           fixed_pred_modes[i][4] * 100.0 / sum_pred_modes[i],
2870                           fixed_pred_modes[i][5] * 100.0 / sum_pred_modes[i],
2871                           fixed_pred_modes[i][6] * 100.0 / sum_pred_modes[i],
2872                           fixed_pred_modes[i][7] * 100.0 / sum_pred_modes[i],
2873                           fixed_pred_modes[i][8] * 100.0 / sum_pred_modes[i] );
2874         }
2875
2876         if( h->param.analyse.i_weighted_pred == X264_WEIGHTP_SMART && h->stat.i_frame_count[SLICE_TYPE_P] > 0 )
2877             x264_log( h, X264_LOG_INFO, "Weighted P-Frames: Y:%.1f%%\n",
2878                       h->stat.i_wpred[0] * 100.0 / h->stat.i_frame_count[SLICE_TYPE_P] );
2879
2880         for( i_list = 0; i_list < 2; i_list++ )
2881         {
2882             int i_slice;
2883             for( i_slice = 0; i_slice < 2; i_slice++ )
2884             {
2885                 char *p = buf;
2886                 int64_t i_den = 0;
2887                 int i_max = 0;
2888                 for( i = 0; i < 32; i++ )
2889                     if( h->stat.i_mb_count_ref[i_slice][i_list][i] )
2890                     {
2891                         i_den += h->stat.i_mb_count_ref[i_slice][i_list][i];
2892                         i_max = i;
2893                     }
2894                 if( i_max == 0 )
2895                     continue;
2896                 for( i = 0; i <= i_max; i++ )
2897                     p += sprintf( p, " %4.1f%%", 100. * h->stat.i_mb_count_ref[i_slice][i_list][i] / i_den );
2898                 x264_log( h, X264_LOG_INFO, "ref %c L%d:%s\n", "PB"[i_slice], i_list, buf );
2899             }
2900         }
2901
2902         if( h->param.analyse.b_ssim )
2903         {
2904             x264_log( h, X264_LOG_INFO,
2905                       "SSIM Mean Y:%.7f\n",
2906                       SUM3( h->stat.f_ssim_mean_y ) / i_count );
2907         }
2908         if( h->param.analyse.b_psnr )
2909         {
2910             x264_log( h, X264_LOG_INFO,
2911                       "PSNR Mean Y:%6.3f U:%6.3f V:%6.3f Avg:%6.3f Global:%6.3f kb/s:%.2f\n",
2912                       SUM3( h->stat.f_psnr_mean_y ) / i_count,
2913                       SUM3( h->stat.f_psnr_mean_u ) / i_count,
2914                       SUM3( h->stat.f_psnr_mean_v ) / i_count,
2915                       SUM3( h->stat.f_psnr_average ) / i_count,
2916                       x264_psnr( SUM3( h->stat.i_ssd_global ), i_count * i_yuv_size ),
2917                       f_bitrate );
2918         }
2919         else
2920             x264_log( h, X264_LOG_INFO, "kb/s:%.2f\n", f_bitrate );
2921     }
2922
2923     /* rc */
2924     x264_ratecontrol_delete( h );
2925
2926     /* param */
2927     if( h->param.rc.psz_stat_out )
2928         free( h->param.rc.psz_stat_out );
2929     if( h->param.rc.psz_stat_in )
2930         free( h->param.rc.psz_stat_in );
2931
2932     x264_cqm_delete( h );
2933     x264_free( h->nal_buffer );
2934     x264_analyse_free_costs( h );
2935
2936     if( h->i_thread_frames > 1)
2937         h = h->thread[h->i_thread_phase];
2938
2939     /* frames */
2940     x264_frame_delete_list( h->frames.unused[0] );
2941     x264_frame_delete_list( h->frames.unused[1] );
2942     x264_frame_delete_list( h->frames.current );
2943     x264_frame_delete_list( h->frames.blank_unused );
2944
2945     h = h->thread[0];
2946
2947     for( i = h->param.i_threads - 1; i >= 0; i-- )
2948     {
2949         x264_frame_t **frame;
2950
2951         if( !h->param.b_sliced_threads || i == 0 )
2952         {
2953             for( frame = h->thread[i]->frames.reference; *frame; frame++ )
2954             {
2955                 assert( (*frame)->i_reference_count > 0 );
2956                 (*frame)->i_reference_count--;
2957                 if( (*frame)->i_reference_count == 0 )
2958                     x264_frame_delete( *frame );
2959             }
2960             frame = &h->thread[i]->fdec;
2961             assert( (*frame)->i_reference_count > 0 );
2962             (*frame)->i_reference_count--;
2963             if( (*frame)->i_reference_count == 0 )
2964                 x264_frame_delete( *frame );
2965             x264_macroblock_cache_end( h->thread[i] );
2966         }
2967         x264_free( h->thread[i]->scratch_buffer );
2968         x264_free( h->thread[i]->out.p_bitstream );
2969         x264_free( h->thread[i]->out.nal);
2970         x264_free( h->thread[i] );
2971     }
2972 }
2973
2974 /****************************************************************************
2975  * x264_encoder_delayed_frames:
2976  ****************************************************************************/
2977 int x264_encoder_delayed_frames( x264_t *h )
2978 {
2979     int delayed_frames = 0;
2980     int i;
2981     if( h->i_thread_frames > 1 )
2982     {
2983         for( i=0; i<h->i_thread_frames; i++ )
2984             delayed_frames += h->thread[i]->b_thread_active;
2985         h = h->thread[h->i_thread_phase];
2986     }
2987     for( i=0; h->frames.current[i]; i++ )
2988         delayed_frames++;
2989     x264_pthread_mutex_lock( &h->lookahead->ofbuf.mutex );
2990     x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
2991     x264_pthread_mutex_lock( &h->lookahead->next.mutex );
2992     delayed_frames += h->lookahead->ifbuf.i_size + h->lookahead->next.i_size + h->lookahead->ofbuf.i_size;
2993     x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
2994     x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
2995     x264_pthread_mutex_unlock( &h->lookahead->ofbuf.mutex );
2996     return delayed_frames;
2997 }