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  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 #include <math.h>
  25
  26 #include "common/common.h"
  27 #include "common/cpu.h"
  28
  29 #include "set.h"
  30 #include "analyse.h"
  31 #include "ratecontrol.h"
  32 #include "macroblock.h"
  33
  34 #if VISUALIZE
  35 #include "common/visualize.h"
  36 #endif
  37
  38 //#define DEBUG_MB_TYPE
  39
  40 #define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
  41
  42 #define bs_write_ue bs_write_ue_big
  43
  44 static void x264_encoder_frame_end( x264_t *h, x264_t *thread_current,
  45                                     x264_nal_t **pp_nal, int *pi_nal,
  46                                     x264_picture_t *pic_out );
  47
  48 /****************************************************************************
  49  *
  50  ******************************* x264 libs **********************************
  51  *
  52  ****************************************************************************/
  53 static float x264_psnr( int64_t i_sqe, int64_t i_size )
  54 {
  55     double f_mse = (double)i_sqe / ((double)65025.0 * (double)i_size);
  56     if( f_mse <= 0.0000000001 ) /* Max 100dB */
  57         return 100;
  58
  59     return (float)(-10.0 * log( f_mse ) / log( 10.0 ));
  60 }
  61
  62 static void x264_frame_dump( x264_t *h )
  63 {
  64     FILE *f = fopen( h->param.psz_dump_yuv, "r+b" );
  65     int i, y;
  66     if( !f )
  67         return;
  68     /* Write the frame in display order */
  69     fseek( f, h->fdec->i_frame * h->param.i_height * h->param.i_width * 3/2, SEEK_SET );
  70     for( i = 0; i < h->fdec->i_plane; i++ )
  71         for( y = 0; y < h->param.i_height >> !!i; y++ )
  72             fwrite( &h->fdec->plane[i][y*h->fdec->i_stride[i]], 1, h->param.i_width >> !!i, f );
  73     fclose( f );
  74 }
  75
  76
  77 /* Fill "default" values */
  78 static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
  79                                     x264_sps_t *sps, x264_pps_t *pps,
  80                                     int i_idr_pic_id, int i_frame, int i_qp )
  81 {
  82     x264_param_t *param = &h->param;
  83     int i;
  84
  85     /* First we fill all field */
  86     sh->sps = sps;
  87     sh->pps = pps;
  88
  89     sh->i_first_mb  = 0;
  90     sh->i_last_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
  91     sh->i_pps_id    = pps->i_id;
  92
  93     sh->i_frame_num = i_frame;
  94
  95     sh->b_mbaff = h->param.b_interlaced;
  96     sh->b_field_pic = 0;    /* no field support for now */
  97     sh->b_bottom_field = 0; /* not yet used */
  98
  99     sh->i_idr_pic_id = i_idr_pic_id;
 100
 101     /* poc stuff, fixed later */
 102     sh->i_poc_lsb = 0;
 103     sh->i_delta_poc_bottom = 0;
 104     sh->i_delta_poc[0] = 0;
 105     sh->i_delta_poc[1] = 0;
 106
 107     sh->i_redundant_pic_cnt = 0;
 108
 109     if( !h->mb.b_direct_auto_read )
 110     {
 111         if( h->mb.b_direct_auto_write )
 112             sh->b_direct_spatial_mv_pred = ( h->stat.i_direct_score[1] > h->stat.i_direct_score[0] );
 113         else
 114             sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
 115     }
 116     /* else b_direct_spatial_mv_pred was read from the 2pass statsfile */
 117
 118     sh->b_num_ref_idx_override = 0;
 119     sh->i_num_ref_idx_l0_active = 1;
 120     sh->i_num_ref_idx_l1_active = 1;
 121
 122     sh->b_ref_pic_list_reordering_l0 = h->b_ref_reorder[0];
 123     sh->b_ref_pic_list_reordering_l1 = h->b_ref_reorder[1];
 124
 125     /* If the ref list isn't in the default order, construct reordering header */
 126     /* List1 reordering isn't needed yet */
 127     if( sh->b_ref_pic_list_reordering_l0 )
 128     {
 129         int pred_frame_num = i_frame;
 130         for( i = 0; i < h->i_ref0; i++ )
 131         {
 132             int diff = h->fref0[i]->i_frame_num - pred_frame_num;
 133             if( diff == 0 )
 134                 x264_log( h, X264_LOG_ERROR, "diff frame num == 0\n" );
 135             sh->ref_pic_list_order[0][i].idc = ( diff > 0 );
 136             sh->ref_pic_list_order[0][i].arg = abs( diff ) - 1;
 137             pred_frame_num = h->fref0[i]->i_frame_num;
 138         }
 139     }
 140
 141     sh->i_cabac_init_idc = param->i_cabac_init_idc;
 142
 143     sh->i_qp = i_qp;
 144     sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
 145     sh->b_sp_for_swidth = 0;
 146     sh->i_qs_delta = 0;
 147
 148     /* If effective qp <= 15, deblocking would have no effect anyway */
 149     if( param->b_deblocking_filter
 150         && ( h->mb.b_variable_qp
 151         || 15 < i_qp + 2 * X264_MIN(param->i_deblocking_filter_alphac0, param->i_deblocking_filter_beta) ) )
 152     {
 153         sh->i_disable_deblocking_filter_idc = 0;
 154     }
 155     else
 156     {
 157         sh->i_disable_deblocking_filter_idc = 1;
 158     }
 159     sh->i_alpha_c0_offset = param->i_deblocking_filter_alphac0 << 1;
 160     sh->i_beta_offset = param->i_deblocking_filter_beta << 1;
 161 }
 162
 163 static void x264_slice_header_write( bs_t *s, x264_slice_header_t *sh, int i_nal_ref_idc )
 164 {
 165     int i;
 166
 167     if( sh->b_mbaff )
 168     {
 169         assert( sh->i_first_mb % (2*sh->sps->i_mb_width) == 0 );
 170         bs_write_ue( s, sh->i_first_mb >> 1 );
 171     }
 172     else
 173         bs_write_ue( s, sh->i_first_mb );
 174
 175     bs_write_ue( s, sh->i_type + 5 );   /* same type things */
 176     bs_write_ue( s, sh->i_pps_id );
 177     bs_write( s, sh->sps->i_log2_max_frame_num, sh->i_frame_num );
 178
 179     if( !sh->sps->b_frame_mbs_only )
 180     {
 181         bs_write1( s, sh->b_field_pic );
 182         if ( sh->b_field_pic )
 183             bs_write1( s, sh->b_bottom_field );
 184     }
 185
 186     if( sh->i_idr_pic_id >= 0 ) /* NAL IDR */
 187     {
 188         bs_write_ue( s, sh->i_idr_pic_id );
 189     }
 190
 191     if( sh->sps->i_poc_type == 0 )
 192     {
 193         bs_write( s, sh->sps->i_log2_max_poc_lsb, sh->i_poc_lsb );
 194         if( sh->pps->b_pic_order && !sh->b_field_pic )
 195         {
 196             bs_write_se( s, sh->i_delta_poc_bottom );
 197         }
 198     }
 199     else if( sh->sps->i_poc_type == 1 && !sh->sps->b_delta_pic_order_always_zero )
 200     {
 201         bs_write_se( s, sh->i_delta_poc[0] );
 202         if( sh->pps->b_pic_order && !sh->b_field_pic )
 203         {
 204             bs_write_se( s, sh->i_delta_poc[1] );
 205         }
 206     }
 207
 208     if( sh->pps->b_redundant_pic_cnt )
 209     {
 210         bs_write_ue( s, sh->i_redundant_pic_cnt );
 211     }
 212
 213     if( sh->i_type == SLICE_TYPE_B )
 214     {
 215         bs_write1( s, sh->b_direct_spatial_mv_pred );
 216     }
 217     if( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP || sh->i_type == SLICE_TYPE_B )
 218     {
 219         bs_write1( s, sh->b_num_ref_idx_override );
 220         if( sh->b_num_ref_idx_override )
 221         {
 222             bs_write_ue( s, sh->i_num_ref_idx_l0_active - 1 );
 223             if( sh->i_type == SLICE_TYPE_B )
 224             {
 225                 bs_write_ue( s, sh->i_num_ref_idx_l1_active - 1 );
 226             }
 227         }
 228     }
 229
 230     /* ref pic list reordering */
 231     if( sh->i_type != SLICE_TYPE_I )
 232     {
 233         bs_write1( s, sh->b_ref_pic_list_reordering_l0 );
 234         if( sh->b_ref_pic_list_reordering_l0 )
 235         {
 236             for( i = 0; i < sh->i_num_ref_idx_l0_active; i++ )
 237             {
 238                 bs_write_ue( s, sh->ref_pic_list_order[0][i].idc );
 239                 bs_write_ue( s, sh->ref_pic_list_order[0][i].arg );
 240
 241             }
 242             bs_write_ue( s, 3 );
 243         }
 244     }
 245     if( sh->i_type == SLICE_TYPE_B )
 246     {
 247         bs_write1( s, sh->b_ref_pic_list_reordering_l1 );
 248         if( sh->b_ref_pic_list_reordering_l1 )
 249         {
 250             for( i = 0; i < sh->i_num_ref_idx_l1_active; i++ )
 251             {
 252                 bs_write_ue( s, sh->ref_pic_list_order[1][i].idc );
 253                 bs_write_ue( s, sh->ref_pic_list_order[1][i].arg );
 254             }
 255             bs_write_ue( s, 3 );
 256         }
 257     }
 258
 259     if( ( sh->pps->b_weighted_pred && ( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP ) ) ||
 260         ( sh->pps->b_weighted_bipred == 1 && sh->i_type == SLICE_TYPE_B ) )
 261     {
 262         /* FIXME */
 263     }
 264
 265     if( i_nal_ref_idc != 0 )
 266     {
 267         if( sh->i_idr_pic_id >= 0 )
 268         {
 269             bs_write1( s, 0 );  /* no output of prior pics flag */
 270             bs_write1( s, 0 );  /* long term reference flag */
 271         }
 272         else
 273         {
 274             bs_write1( s, 0 );  /* adaptive_ref_pic_marking_mode_flag */
 275         }
 276     }
 277
 278     if( sh->pps->b_cabac && sh->i_type != SLICE_TYPE_I )
 279     {
 280         bs_write_ue( s, sh->i_cabac_init_idc );
 281     }
 282     bs_write_se( s, sh->i_qp_delta );      /* slice qp delta */
 283
 284     if( sh->pps->b_deblocking_filter_control )
 285     {
 286         bs_write_ue( s, sh->i_disable_deblocking_filter_idc );
 287         if( sh->i_disable_deblocking_filter_idc != 1 )
 288         {
 289             bs_write_se( s, sh->i_alpha_c0_offset >> 1 );
 290             bs_write_se( s, sh->i_beta_offset >> 1 );
 291         }
 292     }
 293 }
 294
 295 /* If we are within a reasonable distance of the end of the memory allocated for the bitstream, */
 296 /* reallocate, adding an arbitrary amount of space (100 kilobytes). */
 297 static void x264_bitstream_check_buffer( x264_t *h )
 298 {
 299     if( ( h->param.b_cabac && (h->cabac.p_end - h->cabac.p < 2500) )
 300      || ( h->out.bs.p_end - h->out.bs.p < 2500 ) )
 301     {
 302         uint8_t *bs_bak = h->out.p_bitstream;
 303         intptr_t delta;
 304         int i;
 305
 306         h->out.i_bitstream += 100000;
 307         h->out.p_bitstream = x264_realloc( h->out.p_bitstream, h->out.i_bitstream );
 308         delta = h->out.p_bitstream - bs_bak;
 309
 310         h->out.bs.p_start += delta;
 311         h->out.bs.p += delta;
 312         h->out.bs.p_end = h->out.p_bitstream + h->out.i_bitstream;
 313
 314         h->cabac.p_start += delta;
 315         h->cabac.p += delta;
 316         h->cabac.p_end = h->out.p_bitstream + h->out.i_bitstream;
 317
 318         for( i = 0; i <= h->out.i_nal; i++ )
 319             h->out.nal[i].p_payload += delta;
 320     }
 321 }
 322
 323 /****************************************************************************
 324  *
 325  ****************************************************************************
 326  ****************************** External API*********************************
 327  ****************************************************************************
 328  *
 329  ****************************************************************************/
 330
 331 static int x264_validate_parameters( x264_t *h )
 332 {
 333 #ifdef HAVE_MMX
 334     if( !(x264_cpu_detect() & X264_CPU_MMXEXT) )
 335     {
 336         x264_log( h, X264_LOG_ERROR, "your cpu does not support MMXEXT, but x264 was compiled with asm support\n");
 337         x264_log( h, X264_LOG_ERROR, "to run x264, recompile without asm support (configure --disable-asm)\n");
 338         return -1;
 339     }
 340 #endif
 341     if( h->param.i_width <= 0 || h->param.i_height <= 0 )
 342     {
 343         x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
 344                   h->param.i_width, h->param.i_height );
 345         return -1;
 346     }
 347
 348     if( h->param.i_width % 2 || h->param.i_height % 2 )
 349     {
 350         x264_log( h, X264_LOG_ERROR, "width or height not divisible by 2 (%dx%d)\n",
 351                   h->param.i_width, h->param.i_height );
 352         return -1;
 353     }
 354     if( h->param.i_csp != X264_CSP_I420 )
 355     {
 356         x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
 357         return -1;
 358     }
 359
 360     if( h->param.i_threads == 0 )
 361         h->param.i_threads = x264_cpu_num_processors() * 3/2;
 362     h->param.i_threads = x264_clip3( h->param.i_threads, 1, X264_THREAD_MAX );
 363     if( h->param.i_threads > 1 )
 364     {
 365 #ifndef HAVE_PTHREAD
 366         x264_log( h, X264_LOG_WARNING, "not compiled with pthread support!\n");
 367         h->param.i_threads = 1;
 368 #else
 369         if( h->param.i_scenecut_threshold >= 0 )
 370             h->param.b_pre_scenecut = 1;
 371 #endif
 372     }
 373
 374     if( h->param.b_interlaced )
 375     {
 376         if( h->param.analyse.i_me_method >= X264_ME_ESA )
 377         {
 378             x264_log( h, X264_LOG_WARNING, "interlace + me=esa is not implemented\n" );
 379             h->param.analyse.i_me_method = X264_ME_UMH;
 380         }
 381         if( h->param.analyse.i_direct_mv_pred > X264_DIRECT_PRED_SPATIAL )
 382         {
 383             x264_log( h, X264_LOG_WARNING, "interlace + direct=temporal is not implemented\n" );
 384             h->param.analyse.i_direct_mv_pred = X264_DIRECT_PRED_SPATIAL;
 385         }
 386     }
 387
 388     if( h->param.rc.i_rc_method < 0 || h->param.rc.i_rc_method > 2 )
 389     {
 390         x264_log( h, X264_LOG_ERROR, "no ratecontrol method specified\n" );
 391         return -1;
 392     }
 393     h->param.rc.f_rf_constant = x264_clip3f( h->param.rc.f_rf_constant, 0, 51 );
 394     h->param.rc.i_qp_constant = x264_clip3( h->param.rc.i_qp_constant, 0, 51 );
 395     if( h->param.rc.i_rc_method == X264_RC_CRF )
 396         h->param.rc.i_qp_constant = h->param.rc.f_rf_constant;
 397     if( (h->param.rc.i_rc_method == X264_RC_CQP || h->param.rc.i_rc_method == X264_RC_CRF)
 398         && h->param.rc.i_qp_constant == 0 )
 399     {
 400         h->mb.b_lossless = 1;
 401         h->param.i_cqm_preset = X264_CQM_FLAT;
 402         h->param.psz_cqm_file = NULL;
 403         h->param.rc.i_rc_method = X264_RC_CQP;
 404         h->param.rc.f_ip_factor = 1;
 405         h->param.rc.f_pb_factor = 1;
 406         h->param.analyse.b_transform_8x8 = 0;
 407         h->param.analyse.b_psnr = 0;
 408         h->param.analyse.b_ssim = 0;
 409         h->param.analyse.i_chroma_qp_offset = 0;
 410         h->param.analyse.i_trellis = 0;
 411         h->param.analyse.b_fast_pskip = 0;
 412         h->param.analyse.i_noise_reduction = 0;
 413     }
 414     if( h->param.rc.i_rc_method == X264_RC_CQP )
 415     {
 416         float qp_p = h->param.rc.i_qp_constant;
 417         float qp_i = qp_p - 6*log(h->param.rc.f_ip_factor)/log(2);
 418         float qp_b = qp_p + 6*log(h->param.rc.f_pb_factor)/log(2);
 419         h->param.rc.i_qp_min = x264_clip3( (int)(X264_MIN3( qp_p, qp_i, qp_b )), 0, 51 );
 420         h->param.rc.i_qp_max = x264_clip3( (int)(X264_MAX3( qp_p, qp_i, qp_b ) + .999), 0, 51 );
 421         h->param.rc.i_aq_mode = 0;
 422     }
 423     h->param.rc.i_qp_max = x264_clip3( h->param.rc.i_qp_max, 0, 51 );
 424     h->param.rc.i_qp_min = x264_clip3( h->param.rc.i_qp_min, 0, h->param.rc.i_qp_max );
 425
 426     if( ( h->param.i_width % 16 || h->param.i_height % 16 )
 427         && h->param.i_height != 1080 && !h->mb.b_lossless )
 428     {
 429         // There's nothing special about 1080 in that the warning still applies to it,
 430         // but chances are the user can't help it if his content is already 1080p,
 431         // so there's no point in warning in that case.
 432         x264_log( h, X264_LOG_WARNING,
 433                   "width or height not divisible by 16 (%dx%d), compression will suffer.\n",
 434                   h->param.i_width, h->param.i_height );
 435     }
 436
 437     h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
 438     if( h->param.i_keyint_max <= 0 )
 439         h->param.i_keyint_max = 1;
 440     h->param.i_keyint_min = x264_clip3( h->param.i_keyint_min, 1, h->param.i_keyint_max/2+1 );
 441
 442     h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
 443     h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
 444     h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
 445     h->param.b_bframe_adaptive = h->param.b_bframe_adaptive && h->param.i_bframe > 0;
 446     h->param.analyse.b_weighted_bipred = h->param.analyse.b_weighted_bipred && h->param.i_bframe > 0;
 447     h->mb.b_direct_auto_write = h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_AUTO
 448                                 && h->param.i_bframe
 449                                 && ( h->param.rc.b_stat_write || !h->param.rc.b_stat_read );
 450     if( h->param.i_scenecut_threshold < 0 )
 451         h->param.b_pre_scenecut = 0;
 452
 453     h->param.i_deblocking_filter_alphac0 = x264_clip3( h->param.i_deblocking_filter_alphac0, -6, 6 );
 454     h->param.i_deblocking_filter_beta    = x264_clip3( h->param.i_deblocking_filter_beta, -6, 6 );
 455     h->param.analyse.i_luma_deadzone[0] = x264_clip3( h->param.analyse.i_luma_deadzone[0], 0, 32 );
 456     h->param.analyse.i_luma_deadzone[1] = x264_clip3( h->param.analyse.i_luma_deadzone[1], 0, 32 );
 457
 458     h->param.i_cabac_init_idc = x264_clip3( h->param.i_cabac_init_idc, 0, 2 );
 459
 460     if( h->param.i_cqm_preset < X264_CQM_FLAT || h->param.i_cqm_preset > X264_CQM_CUSTOM )
 461         h->param.i_cqm_preset = X264_CQM_FLAT;
 462
 463     if( h->param.analyse.i_me_method < X264_ME_DIA ||
 464         h->param.analyse.i_me_method > X264_ME_TESA )
 465         h->param.analyse.i_me_method = X264_ME_HEX;
 466     if( h->param.analyse.i_me_range < 4 )
 467         h->param.analyse.i_me_range = 4;
 468     if( h->param.analyse.i_me_range > 16 && h->param.analyse.i_me_method <= X264_ME_HEX )
 469         h->param.analyse.i_me_range = 16;
 470     if( h->param.analyse.i_me_method == X264_ME_TESA &&
 471         (h->mb.b_lossless || h->param.analyse.i_subpel_refine <= 1) )
 472         h->param.analyse.i_me_method = X264_ME_ESA;
 473     h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 7 );
 474     h->param.analyse.b_bframe_rdo = h->param.analyse.b_bframe_rdo && h->param.analyse.i_subpel_refine >= 6;
 475     h->param.analyse.b_mixed_references = h->param.analyse.b_mixed_references && h->param.i_frame_reference > 1;
 476     h->param.analyse.inter &= X264_ANALYSE_PSUB16x16|X264_ANALYSE_PSUB8x8|X264_ANALYSE_BSUB16x16|
 477                               X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
 478     h->param.analyse.intra &= X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
 479     if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
 480         h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
 481     if( !h->param.analyse.b_transform_8x8 )
 482     {
 483         h->param.analyse.inter &= ~X264_ANALYSE_I8x8;
 484         h->param.analyse.intra &= ~X264_ANALYSE_I8x8;
 485     }
 486     h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
 487     if( !h->param.b_cabac )
 488         h->param.analyse.i_trellis = 0;
 489     h->param.analyse.i_trellis = x264_clip3( h->param.analyse.i_trellis, 0, 2 );
 490     h->param.rc.i_aq_mode = x264_clip3( h->param.rc.i_aq_mode, 0, 1 );
 491     if( h->param.rc.f_aq_strength <= 0 )
 492         h->param.rc.i_aq_mode = 0;
 493     h->param.analyse.i_noise_reduction = x264_clip3( h->param.analyse.i_noise_reduction, 0, 1<<16 );
 494
 495     {
 496         const x264_level_t *l = x264_levels;
 497         if( h->param.i_level_idc < 0 )
 498         {
 499             if( h->param.rc.i_rc_method == X264_RC_ABR && h->param.rc.i_vbv_buffer_size <= 0 )
 500                 h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate * 2;
 501             h->sps = h->sps_array;
 502             x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
 503             do h->param.i_level_idc = l->level_idc;
 504                 while( l[1].level_idc && x264_validate_levels( h, 0 ) && l++ );
 505             if( h->param.rc.i_vbv_buffer_size <= 0 )
 506                 h->param.rc.i_vbv_max_bitrate = 0;
 507             x264_log( h, X264_LOG_DEBUG, "level_idc: %d\n", h->param.i_level_idc );
 508         }
 509         else
 510         {
 511             while( l->level_idc && l->level_idc != h->param.i_level_idc )
 512                 l++;
 513             if( l->level_idc == 0 )
 514             {
 515                 x264_log( h, X264_LOG_ERROR, "invalid level_idc: %d\n", h->param.i_level_idc );
 516                 return -1;
 517             }
 518         }
 519         if( h->param.analyse.i_mv_range <= 0 )
 520             h->param.analyse.i_mv_range = l->mv_range >> h->param.b_interlaced;
 521         else
 522             h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 512 >> h->param.b_interlaced);
 523         if( h->param.analyse.i_direct_8x8_inference < 0 )
 524             h->param.analyse.i_direct_8x8_inference = l->direct8x8;
 525     }
 526
 527     if( h->param.i_threads > 1 )
 528     {
 529         int r = h->param.analyse.i_mv_range_thread;
 530         int r2;
 531         if( r <= 0 )
 532         {
 533             // half of the available space is reserved and divided evenly among the threads,
 534             // the rest is allocated to whichever thread is far enough ahead to use it.
 535             // reserving more space increases quality for some videos, but costs more time
 536             // in thread synchronization.
 537             int max_range = (h->param.i_height + X264_THREAD_HEIGHT) / h->param.i_threads - X264_THREAD_HEIGHT;
 538             r = max_range / 2;
 539         }
 540         r = X264_MAX( r, h->param.analyse.i_me_range );
 541         r = X264_MIN( r, h->param.analyse.i_mv_range );
 542         // round up to use the whole mb row
 543         r2 = (r & ~15) + ((-X264_THREAD_HEIGHT) & 15);
 544         if( r2 < r )
 545             r2 += 16;
 546         x264_log( h, X264_LOG_DEBUG, "using mv_range_thread = %d\n", r2 );
 547         h->param.analyse.i_mv_range_thread = r2;
 548     }
 549
 550     if( h->param.rc.f_qblur < 0 )
 551         h->param.rc.f_qblur = 0;
 552     if( h->param.rc.f_complexity_blur < 0 )
 553         h->param.rc.f_complexity_blur = 0;
 554
 555     h->param.i_sps_id &= 31;
 556
 557     if( h->param.i_log_level < X264_LOG_INFO )
 558     {
 559         h->param.analyse.b_psnr = 0;
 560         h->param.analyse.b_ssim = 0;
 561     }
 562
 563     /* ensure the booleans are 0 or 1 so they can be used in math */
 564 #define BOOLIFY(x) h->param.x = !!h->param.x
 565     BOOLIFY( b_cabac );
 566     BOOLIFY( b_deblocking_filter );
 567     BOOLIFY( b_interlaced );
 568     BOOLIFY( analyse.b_transform_8x8 );
 569     BOOLIFY( analyse.i_direct_8x8_inference );
 570     BOOLIFY( analyse.b_bidir_me );
 571     BOOLIFY( analyse.b_chroma_me );
 572     BOOLIFY( analyse.b_fast_pskip );
 573     BOOLIFY( rc.b_stat_write );
 574     BOOLIFY( rc.b_stat_read );
 575 #undef BOOLIFY
 576
 577     return 0;
 578 }
 579
 580 static void mbcmp_init( x264_t *h )
 581 {
 582     int satd = !h->mb.b_lossless && h->param.analyse.i_subpel_refine > 1;
 583     memcpy( h->pixf.mbcmp, satd ? h->pixf.satd : h->pixf.sad_aligned, sizeof(h->pixf.mbcmp) );
 584     memcpy( h->pixf.mbcmp_unaligned, satd ? h->pixf.satd : h->pixf.sad, sizeof(h->pixf.mbcmp_unaligned) );
 585     h->pixf.intra_mbcmp_x3_16x16 = satd ? h->pixf.intra_satd_x3_16x16 : h->pixf.intra_sad_x3_16x16;
 586     satd &= h->param.analyse.i_me_method == X264_ME_TESA;
 587     memcpy( h->pixf.fpelcmp, satd ? h->pixf.satd : h->pixf.sad, sizeof(h->pixf.fpelcmp) );
 588     memcpy( h->pixf.fpelcmp_x3, satd ? h->pixf.satd_x3 : h->pixf.sad_x3, sizeof(h->pixf.fpelcmp_x3) );
 589     memcpy( h->pixf.fpelcmp_x4, satd ? h->pixf.satd_x4 : h->pixf.sad_x4, sizeof(h->pixf.fpelcmp_x4) );
 590 }
 591
 592 /****************************************************************************
 593  * x264_encoder_open:
 594  ****************************************************************************/
 595 x264_t *x264_encoder_open   ( x264_param_t *param )
 596 {
 597     x264_t *h = x264_malloc( sizeof( x264_t ) );
 598     char buf[1000], *p;
 599     int i;
 600
 601     memset( h, 0, sizeof( x264_t ) );
 602
 603     /* Create a copy of param */
 604     memcpy( &h->param, param, sizeof( x264_param_t ) );
 605
 606     if( x264_validate_parameters( h ) < 0 )
 607     {
 608         x264_free( h );
 609         return NULL;
 610     }
 611
 612     if( h->param.psz_cqm_file )
 613         if( x264_cqm_parse_file( h, h->param.psz_cqm_file ) < 0 )
 614         {
 615             x264_free( h );
 616             return NULL;
 617         }
 618
 619     if( h->param.rc.psz_stat_out )
 620         h->param.rc.psz_stat_out = strdup( h->param.rc.psz_stat_out );
 621     if( h->param.rc.psz_stat_in )
 622         h->param.rc.psz_stat_in = strdup( h->param.rc.psz_stat_in );
 623
 624     /* VUI */
 625     if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
 626     {
 627         int i_w = param->vui.i_sar_width;
 628         int i_h = param->vui.i_sar_height;
 629
 630         x264_reduce_fraction( &i_w, &i_h );
 631
 632         while( i_w > 65535 || i_h > 65535 )
 633         {
 634             i_w /= 2;
 635             i_h /= 2;
 636         }
 637
 638         h->param.vui.i_sar_width = 0;
 639         h->param.vui.i_sar_height = 0;
 640         if( i_w == 0 || i_h == 0 )
 641         {
 642             x264_log( h, X264_LOG_WARNING, "cannot create valid sample aspect ratio\n" );
 643         }
 644         else
 645         {
 646             x264_log( h, X264_LOG_INFO, "using SAR=%d/%d\n", i_w, i_h );
 647             h->param.vui.i_sar_width = i_w;
 648             h->param.vui.i_sar_height = i_h;
 649         }
 650     }
 651
 652     x264_reduce_fraction( &h->param.i_fps_num, &h->param.i_fps_den );
 653
 654     /* Init x264_t */
 655     h->i_frame = 0;
 656     h->i_frame_num = 0;
 657     h->i_idr_pic_id = 0;
 658
 659     h->sps = &h->sps_array[0];
 660     x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
 661
 662     h->pps = &h->pps_array[0];
 663     x264_pps_init( h->pps, h->param.i_sps_id, &h->param, h->sps);
 664
 665     x264_validate_levels( h, 1 );
 666
 667     if( x264_cqm_init( h ) < 0 )
 668     {
 669         x264_free( h );
 670         return NULL;
 671     }
 672
 673     h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
 674
 675     /* Init frames. */
 676     h->frames.i_delay = h->param.i_bframe + h->param.i_threads - 1;
 677     h->frames.i_max_ref0 = h->param.i_frame_reference;
 678     h->frames.i_max_ref1 = h->sps->vui.i_num_reorder_frames;
 679     h->frames.i_max_dpb  = h->sps->vui.i_max_dec_frame_buffering;
 680     h->frames.b_have_lowres = !h->param.rc.b_stat_read
 681         && ( h->param.rc.i_rc_method == X264_RC_ABR
 682           || h->param.rc.i_rc_method == X264_RC_CRF
 683           || h->param.b_bframe_adaptive
 684           || h->param.b_pre_scenecut );
 685     h->frames.b_have_lowres |= (h->param.rc.b_stat_read && h->param.rc.i_vbv_buffer_size > 0);
 686
 687     h->frames.i_last_idr = - h->param.i_keyint_max;
 688     h->frames.i_input    = 0;
 689     h->frames.last_nonb  = NULL;
 690
 691     h->i_ref0 = 0;
 692     h->i_ref1 = 0;
 693
 694     h->chroma_qp_table = i_chroma_qp_table + 12 + h->pps->i_chroma_qp_index_offset;
 695
 696     x264_rdo_init( );
 697
 698     /* init CPU functions */
 699     x264_predict_16x16_init( h->param.cpu, h->predict_16x16 );
 700     x264_predict_8x8c_init( h->param.cpu, h->predict_8x8c );
 701     x264_predict_8x8_init( h->param.cpu, h->predict_8x8 );
 702     x264_predict_4x4_init( h->param.cpu, h->predict_4x4 );
 703
 704     x264_pixel_init( h->param.cpu, &h->pixf );
 705     x264_dct_init( h->param.cpu, &h->dctf );
 706     x264_zigzag_init( h->param.cpu, &h->zigzagf, h->param.b_interlaced );
 707     x264_mc_init( h->param.cpu, &h->mc );
 708     x264_quant_init( h, h->param.cpu, &h->quantf );
 709     x264_deblock_init( h->param.cpu, &h->loopf );
 710     x264_dct_init_weights();
 711
 712     mbcmp_init( h );
 713
 714     p = buf + sprintf( buf, "using cpu capabilities:" );
 715     for( i=0; x264_cpu_names[i].flags; i++ )
 716     {
 717         if( !strcmp(x264_cpu_names[i].name, "SSE2")
 718             && param->cpu & (X264_CPU_SSE2_IS_FAST|X264_CPU_SSE2_IS_SLOW) )
 719             continue;
 720         if( !strcmp(x264_cpu_names[i].name, "SSE3")
 721             && (param->cpu & X264_CPU_SSSE3 || !(param->cpu & X264_CPU_CACHELINE_64)) )
 722             continue;
 723         if( (param->cpu & x264_cpu_names[i].flags) == x264_cpu_names[i].flags
 724             && (!i || x264_cpu_names[i].flags != x264_cpu_names[i-1].flags) )
 725             p += sprintf( p, " %s", x264_cpu_names[i].name );
 726     }
 727     if( !param->cpu )
 728         p += sprintf( p, " none!" );
 729     x264_log( h, X264_LOG_INFO, "%s\n", buf );
 730
 731     h->out.i_nal = 0;
 732     h->out.i_bitstream = X264_MAX( 1000000, h->param.i_width * h->param.i_height * 4
 733         * ( h->param.rc.i_rc_method == X264_RC_ABR ? pow( 0.95, h->param.rc.i_qp_min )
 734           : pow( 0.95, h->param.rc.i_qp_constant ) * X264_MAX( 1, h->param.rc.f_ip_factor )));
 735
 736     h->thread[0] = h;
 737     h->i_thread_num = 0;
 738     for( i = 1; i < h->param.i_threads; i++ )
 739         h->thread[i] = x264_malloc( sizeof(x264_t) );
 740
 741     for( i = 0; i < h->param.i_threads; i++ )
 742     {
 743         if( i > 0 )
 744             *h->thread[i] = *h;
 745         h->thread[i]->fdec = x264_frame_pop_unused( h );
 746         h->thread[i]->out.p_bitstream = x264_malloc( h->out.i_bitstream );
 747         if( x264_macroblock_cache_init( h->thread[i] ) < 0 )
 748             return NULL;
 749     }
 750
 751     if( x264_ratecontrol_new( h ) < 0 )
 752         return NULL;
 753
 754     if( h->param.psz_dump_yuv )
 755     {
 756         /* create or truncate the reconstructed video file */
 757         FILE *f = fopen( h->param.psz_dump_yuv, "w" );
 758         if( f )
 759             fclose( f );
 760         else
 761         {
 762             x264_log( h, X264_LOG_ERROR, "can't write to fdec.yuv\n" );
 763             x264_free( h );
 764             return NULL;
 765         }
 766     }
 767
 768     return h;
 769 }
 770
 771 /****************************************************************************
 772  * x264_encoder_reconfig:
 773  ****************************************************************************/
 774 int x264_encoder_reconfig( x264_t *h, x264_param_t *param )
 775 {
 776 #define COPY(var) h->param.var = param->var
 777     COPY( i_frame_reference ); // but never uses more refs than initially specified
 778     COPY( i_bframe_bias );
 779     if( h->param.i_scenecut_threshold >= 0 && param->i_scenecut_threshold >= 0 )
 780         COPY( i_scenecut_threshold ); // can't turn it on or off, only vary the threshold
 781     COPY( b_deblocking_filter );
 782     COPY( i_deblocking_filter_alphac0 );
 783     COPY( i_deblocking_filter_beta );
 784     COPY( analyse.intra );
 785     COPY( analyse.inter );
 786     COPY( analyse.i_direct_mv_pred );
 787     COPY( analyse.i_me_method );
 788     COPY( analyse.i_me_range );
 789     COPY( analyse.i_noise_reduction );
 790     COPY( analyse.i_subpel_refine );
 791     COPY( analyse.i_trellis );
 792     COPY( analyse.b_bidir_me );
 793     COPY( analyse.b_bframe_rdo );
 794     COPY( analyse.b_chroma_me );
 795     COPY( analyse.b_dct_decimate );
 796     COPY( analyse.b_fast_pskip );
 797     COPY( analyse.b_mixed_references );
 798     // can only twiddle these if they were enabled to begin with:
 799     if( h->pps->b_transform_8x8_mode )
 800         COPY( analyse.b_transform_8x8 );
 801     if( h->frames.i_max_ref1 > 1 )
 802         COPY( b_bframe_pyramid );
 803 #undef COPY
 804
 805     mbcmp_init( h );
 806
 807     return x264_validate_parameters( h );
 808 }
 809
 810 /* internal usage */
 811 static void x264_nal_start( x264_t *h, int i_type, int i_ref_idc )
 812 {
 813     x264_nal_t *nal = &h->out.nal[h->out.i_nal];
 814
 815     nal->i_ref_idc = i_ref_idc;
 816     nal->i_type    = i_type;
 817
 818     nal->i_payload= 0;
 819     nal->p_payload= &h->out.p_bitstream[bs_pos( &h->out.bs ) / 8];
 820 }
 821 static void x264_nal_end( x264_t *h )
 822 {
 823     x264_nal_t *nal = &h->out.nal[h->out.i_nal];
 824     nal->i_payload = &h->out.p_bitstream[bs_pos( &h->out.bs ) / 8] - nal->p_payload;
 825     h->out.i_nal++;
 826 }
 827
 828 /****************************************************************************
 829  * x264_encoder_headers:
 830  ****************************************************************************/
 831 int x264_encoder_headers( x264_t *h, x264_nal_t **pp_nal, int *pi_nal )
 832 {
 833     /* init bitstream context */
 834     h->out.i_nal = 0;
 835     bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );
 836
 837     /* Put SPS and PPS */
 838     if( h->i_frame == 0 )
 839     {
 840         /* identify ourself */
 841         x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
 842         x264_sei_version_write( h, &h->out.bs );
 843         x264_nal_end( h );
 844
 845         /* generate sequence parameters */
 846         x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
 847         x264_sps_write( &h->out.bs, h->sps );
 848         x264_nal_end( h );
 849
 850         /* generate picture parameters */
 851         x264_nal_start( h, NAL_PPS, NAL_PRIORITY_HIGHEST );
 852         x264_pps_write( &h->out.bs, h->pps );
 853         x264_nal_end( h );
 854     }
 855     /* now set output*/
 856     *pi_nal = h->out.i_nal;
 857     *pp_nal = &h->out.nal[0];
 858     h->out.i_nal = 0;
 859
 860     return 0;
 861 }
 862
 863 static inline void x264_reference_build_list( x264_t *h, int i_poc )
 864 {
 865     int i;
 866     int b_ok;
 867
 868     /* build ref list 0/1 */
 869     h->i_ref0 = 0;
 870     h->i_ref1 = 0;
 871     for( i = 0; h->frames.reference[i]; i++ )
 872     {
 873         if( h->frames.reference[i]->i_poc < i_poc )
 874         {
 875             h->fref0[h->i_ref0++] = h->frames.reference[i];
 876         }
 877         else if( h->frames.reference[i]->i_poc > i_poc )
 878         {
 879             h->fref1[h->i_ref1++] = h->frames.reference[i];
 880         }
 881     }
 882
 883     /* Order ref0 from higher to lower poc */
 884     do
 885     {
 886         b_ok = 1;
 887         for( i = 0; i < h->i_ref0 - 1; i++ )
 888         {
 889             if( h->fref0[i]->i_poc < h->fref0[i+1]->i_poc )
 890             {
 891                 XCHG( x264_frame_t*, h->fref0[i], h->fref0[i+1] );
 892                 b_ok = 0;
 893                 break;
 894             }
 895         }
 896     } while( !b_ok );
 897     /* Order ref1 from lower to higher poc (bubble sort) for B-frame */
 898     do
 899     {
 900         b_ok = 1;
 901         for( i = 0; i < h->i_ref1 - 1; i++ )
 902         {
 903             if( h->fref1[i]->i_poc > h->fref1[i+1]->i_poc )
 904             {
 905                 XCHG( x264_frame_t*, h->fref1[i], h->fref1[i+1] );
 906                 b_ok = 0;
 907                 break;
 908             }
 909         }
 910     } while( !b_ok );
 911
 912     /* In the standard, a P-frame's ref list is sorted by frame_num.
 913      * We use POC, but check whether explicit reordering is needed */
 914     h->b_ref_reorder[0] =
 915     h->b_ref_reorder[1] = 0;
 916     if( h->sh.i_type == SLICE_TYPE_P )
 917     {
 918         for( i = 0; i < h->i_ref0 - 1; i++ )
 919             if( h->fref0[i]->i_frame_num < h->fref0[i+1]->i_frame_num )
 920             {
 921                 h->b_ref_reorder[0] = 1;
 922                 break;
 923             }
 924     }
 925
 926     h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
 927     h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
 928     h->i_ref0 = X264_MIN( h->i_ref0, h->param.i_frame_reference ); // if reconfig() has lowered the limit
 929     assert( h->i_ref0 + h->i_ref1 <= 16 );
 930     h->mb.pic.i_fref[0] = h->i_ref0;
 931     h->mb.pic.i_fref[1] = h->i_ref1;
 932 }
 933
 934 static void x264_fdec_filter_row( x264_t *h, int mb_y )
 935 {
 936     /* mb_y is the mb to be encoded next, not the mb to be filtered here */
 937     int b_hpel = h->fdec->b_kept_as_ref;
 938     int b_deblock = !h->sh.i_disable_deblocking_filter_idc;
 939     int b_end = mb_y == h->sps->i_mb_height;
 940     int min_y = mb_y - (1 << h->sh.b_mbaff);
 941     int max_y = b_end ? h->sps->i_mb_height : mb_y;
 942     b_deblock &= b_hpel || h->param.psz_dump_yuv;
 943     if( mb_y & h->sh.b_mbaff )
 944         return;
 945     if( min_y < 0 )
 946         return;
 947
 948     if( !b_end )
 949     {
 950         int i, j;
 951         for( j=0; j<=h->sh.b_mbaff; j++ )
 952             for( i=0; i<3; i++ )
 953             {
 954                 memcpy( h->mb.intra_border_backup[j][i],
 955                         h->fdec->plane[i] + ((mb_y*16 >> !!i) + j - 1 - h->sh.b_mbaff) * h->fdec->i_stride[i],
 956                         h->sps->i_mb_width*16 >> !!i );
 957             }
 958     }
 959
 960     if( b_deblock )
 961     {
 962         int y;
 963         for( y = min_y; y < max_y; y += (1 << h->sh.b_mbaff) )
 964             x264_frame_deblock_row( h, y );
 965     }
 966
 967     if( b_hpel )
 968     {
 969         x264_frame_expand_border( h, h->fdec, min_y, b_end );
 970         x264_frame_filter( h, h->fdec, min_y, b_end );
 971         x264_frame_expand_border_filtered( h, h->fdec, min_y, b_end );
 972     }
 973
 974     if( h->param.i_threads > 1 && h->fdec->b_kept_as_ref )
 975     {
 976         x264_frame_cond_broadcast( h->fdec, mb_y*16 + (b_end ? 10000 : -(X264_THREAD_HEIGHT << h->sh.b_mbaff)) );
 977     }
 978
 979     min_y = X264_MAX( min_y*16-8, 0 );
 980     max_y = b_end ? h->param.i_height : mb_y*16-8;
 981
 982     if( h->param.analyse.b_psnr )
 983     {
 984         int i;
 985         for( i=0; i<3; i++ )
 986             h->stat.frame.i_ssd[i] +=
 987                 x264_pixel_ssd_wxh( &h->pixf,
 988                     h->fdec->plane[i] + (min_y>>!!i) * h->fdec->i_stride[i], h->fdec->i_stride[i],
 989                     h->fenc->plane[i] + (min_y>>!!i) * h->fenc->i_stride[i], h->fenc->i_stride[i],
 990                     h->param.i_width >> !!i, (max_y-min_y) >> !!i );
 991     }
 992
 993     if( h->param.analyse.b_ssim )
 994     {
 995         x264_emms();
 996         /* offset by 2 pixels to avoid alignment of ssim blocks with dct blocks,
 997          * and overlap by 4 */
 998         min_y += min_y == 0 ? 2 : -6;
 999         h->stat.frame.f_ssim +=
1000             x264_pixel_ssim_wxh( &h->pixf,
1001                 h->fdec->plane[0] + 2+min_y*h->fdec->i_stride[0], h->fdec->i_stride[0],
1002                 h->fenc->plane[0] + 2+min_y*h->fenc->i_stride[0], h->fenc->i_stride[0],
1003                 h->param.i_width-2, max_y-min_y );
1004     }
1005 }
1006
1007 static inline void x264_reference_update( x264_t *h )
1008 {
1009     int i;
1010
1011     if( h->fdec->i_frame >= 0 )
1012         h->i_frame++;
1013
1014     if( !h->fdec->b_kept_as_ref )
1015     {
1016         if( h->param.i_threads > 1 )
1017         {
1018             x264_frame_push_unused( h, h->fdec );
1019             h->fdec = x264_frame_pop_unused( h );
1020         }
1021         return;
1022     }
1023
1024     /* move lowres copy of the image to the ref frame */
1025     for( i = 0; i < 4; i++)
1026     {
1027         XCHG( uint8_t*, h->fdec->lowres[i], h->fenc->lowres[i] );
1028         XCHG( uint8_t*, h->fdec->buffer_lowres[i], h->fenc->buffer_lowres[i] );
1029     }
1030
1031     /* adaptive B decision needs a pointer, since it can't use the ref lists */
1032     if( h->sh.i_type != SLICE_TYPE_B )
1033         h->frames.last_nonb = h->fdec;
1034
1035     /* move frame in the buffer */
1036     x264_frame_push( h->frames.reference, h->fdec );
1037     if( h->frames.reference[h->frames.i_max_dpb] )
1038         x264_frame_push_unused( h, x264_frame_shift( h->frames.reference ) );
1039     h->fdec = x264_frame_pop_unused( h );
1040 }
1041
1042 static inline void x264_reference_reset( x264_t *h )
1043 {
1044     while( h->frames.reference[0] )
1045         x264_frame_push_unused( h, x264_frame_pop( h->frames.reference ) );
1046     h->fdec->i_poc =
1047     h->fenc->i_poc = 0;
1048 }
1049
1050 static inline void x264_slice_init( x264_t *h, int i_nal_type, int i_global_qp )
1051 {
1052     /* ------------------------ Create slice header  ----------------------- */
1053     if( i_nal_type == NAL_SLICE_IDR )
1054     {
1055         x264_slice_header_init( h, &h->sh, h->sps, h->pps, h->i_idr_pic_id, h->i_frame_num, i_global_qp );
1056
1057         /* increment id */
1058         h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
1059     }
1060     else
1061     {
1062         x264_slice_header_init( h, &h->sh, h->sps, h->pps, -1, h->i_frame_num, i_global_qp );
1063
1064         /* always set the real higher num of ref frame used */
1065         h->sh.b_num_ref_idx_override = 1;
1066         h->sh.i_num_ref_idx_l0_active = h->i_ref0 <= 0 ? 1 : h->i_ref0;
1067         h->sh.i_num_ref_idx_l1_active = h->i_ref1 <= 0 ? 1 : h->i_ref1;
1068     }
1069
1070     h->fdec->i_frame_num = h->sh.i_frame_num;
1071
1072     if( h->sps->i_poc_type == 0 )
1073     {
1074         h->sh.i_poc_lsb = h->fdec->i_poc & ( (1 << h->sps->i_log2_max_poc_lsb) - 1 );
1075         h->sh.i_delta_poc_bottom = 0;   /* XXX won't work for field */
1076     }
1077     else if( h->sps->i_poc_type == 1 )
1078     {
1079         /* FIXME TODO FIXME */
1080     }
1081     else
1082     {
1083         /* Nothing to do ? */
1084     }
1085
1086     x264_macroblock_slice_init( h );
1087 }
1088
1089 static void x264_slice_write( x264_t *h )
1090 {
1091     int i_skip;
1092     int mb_xy, i_mb_x, i_mb_y;
1093     int i, i_list, i_ref;
1094
1095     /* init stats */
1096     memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
1097
1098     /* Slice */
1099     x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
1100
1101     /* Slice header */
1102     x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
1103     if( h->param.b_cabac )
1104     {
1105         /* alignment needed */
1106         bs_align_1( &h->out.bs );
1107
1108         /* init cabac */
1109         x264_cabac_context_init( &h->cabac, h->sh.i_type, h->sh.i_qp, h->sh.i_cabac_init_idc );
1110         x264_cabac_encode_init ( &h->cabac, h->out.bs.p, h->out.bs.p_end );
1111     }
1112     h->mb.i_last_qp = h->sh.i_qp;
1113     h->mb.i_last_dqp = 0;
1114
1115     i_mb_y = h->sh.i_first_mb / h->sps->i_mb_width;
1116     i_mb_x = h->sh.i_first_mb % h->sps->i_mb_width;
1117     i_skip = 0;
1118
1119     while( (mb_xy = i_mb_x + i_mb_y * h->sps->i_mb_width) < h->sh.i_last_mb )
1120     {
1121         int mb_spos = bs_pos(&h->out.bs) + x264_cabac_pos(&h->cabac);
1122
1123         if( i_mb_x == 0 )
1124             x264_fdec_filter_row( h, i_mb_y );
1125
1126         /* load cache */
1127         x264_macroblock_cache_load( h, i_mb_x, i_mb_y );
1128
1129         /* analyse parameters
1130          * Slice I: choose I_4x4 or I_16x16 mode
1131          * Slice P: choose between using P mode or intra (4x4 or 16x16)
1132          * */
1133         x264_macroblock_analyse( h );
1134
1135         /* encode this macroblock -> be careful it can change the mb type to P_SKIP if needed */
1136         x264_macroblock_encode( h );
1137
1138         x264_bitstream_check_buffer( h );
1139
1140         if( h->param.b_cabac )
1141         {
1142             if( mb_xy > h->sh.i_first_mb && !(h->sh.b_mbaff && (i_mb_y&1)) )
1143                 x264_cabac_encode_terminal( &h->cabac );
1144
1145             if( IS_SKIP( h->mb.i_type ) )
1146                 x264_cabac_mb_skip( h, 1 );
1147             else
1148             {
1149                 if( h->sh.i_type != SLICE_TYPE_I )
1150                     x264_cabac_mb_skip( h, 0 );
1151                 x264_macroblock_write_cabac( h, &h->cabac );
1152             }
1153         }
1154         else
1155         {
1156             if( IS_SKIP( h->mb.i_type ) )
1157                 i_skip++;
1158             else
1159             {
1160                 if( h->sh.i_type != SLICE_TYPE_I )
1161                 {
1162                     bs_write_ue( &h->out.bs, i_skip );  /* skip run */
1163                     i_skip = 0;
1164                 }
1165                 x264_macroblock_write_cavlc( h, &h->out.bs );
1166             }
1167         }
1168
1169 #if VISUALIZE
1170         if( h->param.b_visualize )
1171             x264_visualize_mb( h );
1172 #endif
1173
1174         /* save cache */
1175         x264_macroblock_cache_save( h );
1176
1177         /* accumulate mb stats */
1178         h->stat.frame.i_mb_count[h->mb.i_type]++;
1179         if( !IS_SKIP(h->mb.i_type) && !IS_INTRA(h->mb.i_type) && !IS_DIRECT(h->mb.i_type) )
1180         {
1181             if( h->mb.i_partition != D_8x8 )
1182                 h->stat.frame.i_mb_partition[h->mb.i_partition] += 4;
1183             else
1184                 for( i = 0; i < 4; i++ )
1185                     h->stat.frame.i_mb_partition[h->mb.i_sub_partition[i]] ++;
1186             if( h->param.i_frame_reference > 1 )
1187                 for( i_list = 0; i_list <= (h->sh.i_type == SLICE_TYPE_B); i_list++ )
1188                     for( i = 0; i < 4; i++ )
1189                     {
1190                         i_ref = h->mb.cache.ref[i_list][ x264_scan8[4*i] ];
1191                         if( i_ref >= 0 )
1192                             h->stat.frame.i_mb_count_ref[i_list][i_ref] ++;
1193                     }
1194         }
1195         if( h->mb.i_cbp_luma && !IS_INTRA(h->mb.i_type) )
1196         {
1197             h->stat.frame.i_mb_count_8x8dct[0] ++;
1198             h->stat.frame.i_mb_count_8x8dct[1] += h->mb.b_transform_8x8;
1199         }
1200
1201         x264_ratecontrol_mb( h, bs_pos(&h->out.bs) + x264_cabac_pos(&h->cabac) - mb_spos );
1202
1203         if( h->sh.b_mbaff )
1204         {
1205             i_mb_x += i_mb_y & 1;
1206             i_mb_y ^= i_mb_x < h->sps->i_mb_width;
1207         }
1208         else
1209             i_mb_x++;
1210         if(i_mb_x == h->sps->i_mb_width)
1211         {
1212             i_mb_y++;
1213             i_mb_x = 0;
1214         }
1215     }
1216
1217     if( h->param.b_cabac )
1218     {
1219         x264_cabac_encode_flush( h, &h->cabac );
1220         h->out.bs.p = h->cabac.p;
1221     }
1222     else
1223     {
1224         if( i_skip > 0 )
1225             bs_write_ue( &h->out.bs, i_skip );  /* last skip run */
1226         /* rbsp_slice_trailing_bits */
1227         bs_rbsp_trailing( &h->out.bs );
1228     }
1229
1230     x264_nal_end( h );
1231
1232     x264_fdec_filter_row( h, h->sps->i_mb_height );
1233
1234     /* Compute misc bits */
1235     h->stat.frame.i_misc_bits = bs_pos( &h->out.bs )
1236                               + NALU_OVERHEAD * 8
1237                               - h->stat.frame.i_tex_bits
1238                               - h->stat.frame.i_mv_bits;
1239 }
1240
1241 static void x264_thread_sync_context( x264_t *dst, x264_t *src )
1242 {
1243     x264_frame_t **f;
1244     if( dst == src )
1245         return;
1246
1247     // reference counting
1248     for( f = src->frames.reference; *f; f++ )
1249         (*f)->i_reference_count++;
1250     for( f = dst->frames.reference; *f; f++ )
1251         x264_frame_push_unused( src, *f );
1252     src->fdec->i_reference_count++;
1253     x264_frame_push_unused( src, dst->fdec );
1254
1255     // copy everything except the per-thread pointers and the constants.
1256     memcpy( &dst->i_frame, &src->i_frame, offsetof(x264_t, mb.type) - offsetof(x264_t, i_frame) );
1257     dst->stat = src->stat;
1258 }
1259
1260 static void x264_thread_sync_stat( x264_t *dst, x264_t *src )
1261 {
1262     if( dst == src )
1263         return;
1264     memcpy( &dst->stat.i_slice_count, &src->stat.i_slice_count, sizeof(dst->stat) - sizeof(dst->stat.frame) );
1265 }
1266
1267 static int x264_slices_write( x264_t *h )
1268 {
1269     int i_frame_size;
1270
1271 #if VISUALIZE
1272     if( h->param.b_visualize )
1273         x264_visualize_init( h );
1274 #endif
1275
1276     x264_stack_align( x264_slice_write, h );
1277     i_frame_size = h->out.nal[h->out.i_nal-1].i_payload;
1278
1279 #if VISUALIZE
1280     if( h->param.b_visualize )
1281     {
1282         x264_visualize_show( h );
1283         x264_visualize_close( h );
1284     }
1285 #endif
1286
1287     h->out.i_frame_size = i_frame_size;
1288     return 0;
1289 }
1290
1291 /****************************************************************************
1292  * x264_encoder_encode:
1293  *  XXX: i_poc   : is the poc of the current given picture
1294  *       i_frame : is the number of the frame being coded
1295  *  ex:  type frame poc
1296  *       I      0   2*0
1297  *       P      1   2*3
1298  *       B      2   2*1
1299  *       B      3   2*2
1300  *       P      4   2*6
1301  *       B      5   2*4
1302  *       B      6   2*5
1303  ****************************************************************************/
1304 int     x264_encoder_encode( x264_t *h,
1305                              x264_nal_t **pp_nal, int *pi_nal,
1306                              x264_picture_t *pic_in,
1307                              x264_picture_t *pic_out )
1308 {
1309     x264_t *thread_current, *thread_prev, *thread_oldest;
1310     int     i_nal_type;
1311     int     i_nal_ref_idc;
1312
1313     int   i_global_qp;
1314
1315     if( h->param.i_threads > 1)
1316     {
1317         int i = ++h->i_thread_phase;
1318         int t = h->param.i_threads;
1319         thread_current = h->thread[ i%t ];
1320         thread_prev    = h->thread[ (i-1)%t ];
1321         thread_oldest  = h->thread[ (i+1)%t ];
1322         x264_thread_sync_context( thread_current, thread_prev );
1323         x264_thread_sync_ratecontrol( thread_current, thread_prev, thread_oldest );
1324         h = thread_current;
1325 //      fprintf(stderr, "current: %p  prev: %p  oldest: %p \n", thread_current, thread_prev, thread_oldest);
1326     }
1327     else
1328     {
1329         thread_current =
1330         thread_prev    =
1331         thread_oldest  = h;
1332     }
1333
1334     // ok to call this before encoding any frames, since the initial values of fdec have b_kept_as_ref=0
1335     x264_reference_update( h );
1336     h->fdec->i_lines_completed = -1;
1337
1338     /* no data out */
1339     *pi_nal = 0;
1340     *pp_nal = NULL;
1341
1342     /* ------------------- Setup new frame from picture -------------------- */
1343     if( pic_in != NULL )
1344     {
1345         /* 1: Copy the picture to a frame and move it to a buffer */
1346         x264_frame_t *fenc = x264_frame_pop_unused( h );
1347
1348         if( x264_frame_copy_picture( h, fenc, pic_in ) < 0 )
1349             return -1;
1350
1351         if( h->param.i_width != 16 * h->sps->i_mb_width ||
1352             h->param.i_height != 16 * h->sps->i_mb_height )
1353             x264_frame_expand_border_mod16( h, fenc );
1354
1355         fenc->i_frame = h->frames.i_input++;
1356
1357         x264_frame_push( h->frames.next, fenc );
1358
1359         if( h->frames.b_have_lowres )
1360             x264_frame_init_lowres( h, fenc );
1361
1362         if( h->param.rc.i_aq_mode )
1363             x264_adaptive_quant_frame( h, fenc );
1364
1365         if( h->frames.i_input <= h->frames.i_delay + 1 - h->param.i_threads )
1366         {
1367             /* Nothing yet to encode */
1368             /* waiting for filling bframe buffer */
1369             pic_out->i_type = X264_TYPE_AUTO;
1370             return 0;
1371         }
1372     }
1373
1374     if( h->frames.current[0] == NULL )
1375     {
1376         int bframes = 0;
1377         /* 2: Select frame types */
1378         if( h->frames.next[0] == NULL )
1379         {
1380             x264_encoder_frame_end( thread_oldest, thread_current, pp_nal, pi_nal, pic_out );
1381             return 0;
1382         }
1383
1384         x264_slicetype_decide( h );
1385
1386         /* 3: move some B-frames and 1 non-B to encode queue */
1387         while( IS_X264_TYPE_B( h->frames.next[bframes]->i_type ) )
1388             bframes++;
1389         x264_frame_push( h->frames.current, x264_frame_shift( &h->frames.next[bframes] ) );
1390         /* FIXME: when max B-frames > 3, BREF may no longer be centered after GOP closing */
1391         if( h->param.b_bframe_pyramid && bframes > 1 )
1392         {
1393             x264_frame_t *mid = x264_frame_shift( &h->frames.next[bframes/2] );
1394             mid->i_type = X264_TYPE_BREF;
1395             x264_frame_push( h->frames.current, mid );
1396             bframes--;
1397         }
1398         while( bframes-- )
1399             x264_frame_push( h->frames.current, x264_frame_shift( h->frames.next ) );
1400     }
1401
1402     /* ------------------- Get frame to be encoded ------------------------- */
1403     /* 4: get picture to encode */
1404     h->fenc = x264_frame_shift( h->frames.current );
1405     if( h->fenc == NULL )
1406     {
1407         /* Nothing yet to encode (ex: waiting for I/P with B frames) */
1408         /* waiting for filling bframe buffer */
1409         pic_out->i_type = X264_TYPE_AUTO;
1410         return 0;
1411     }
1412
1413 do_encode:
1414
1415     if( h->fenc->i_type == X264_TYPE_IDR )
1416     {
1417         h->frames.i_last_idr = h->fenc->i_frame;
1418     }
1419
1420     /* ------------------- Setup frame context ----------------------------- */
1421     /* 5: Init data dependent of frame type */
1422     if( h->fenc->i_type == X264_TYPE_IDR )
1423     {
1424         /* reset ref pictures */
1425         x264_reference_reset( h );
1426
1427         i_nal_type    = NAL_SLICE_IDR;
1428         i_nal_ref_idc = NAL_PRIORITY_HIGHEST;
1429         h->sh.i_type = SLICE_TYPE_I;
1430     }
1431     else if( h->fenc->i_type == X264_TYPE_I )
1432     {
1433         i_nal_type    = NAL_SLICE;
1434         i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
1435         h->sh.i_type = SLICE_TYPE_I;
1436     }
1437     else if( h->fenc->i_type == X264_TYPE_P )
1438     {
1439         i_nal_type    = NAL_SLICE;
1440         i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
1441         h->sh.i_type = SLICE_TYPE_P;
1442     }
1443     else if( h->fenc->i_type == X264_TYPE_BREF )
1444     {
1445         i_nal_type    = NAL_SLICE;
1446         i_nal_ref_idc = NAL_PRIORITY_HIGH; /* maybe add MMCO to forget it? -> low */
1447         h->sh.i_type = SLICE_TYPE_B;
1448     }
1449     else    /* B frame */
1450     {
1451         i_nal_type    = NAL_SLICE;
1452         i_nal_ref_idc = NAL_PRIORITY_DISPOSABLE;
1453         h->sh.i_type = SLICE_TYPE_B;
1454     }
1455
1456     h->fdec->i_poc =
1457     h->fenc->i_poc = 2 * (h->fenc->i_frame - h->frames.i_last_idr);
1458     h->fdec->i_type = h->fenc->i_type;
1459     h->fdec->i_frame = h->fenc->i_frame;
1460     h->fenc->b_kept_as_ref =
1461     h->fdec->b_kept_as_ref = i_nal_ref_idc != NAL_PRIORITY_DISPOSABLE && h->param.i_keyint_max > 1;
1462
1463
1464
1465     /* ------------------- Init                ----------------------------- */
1466     /* build ref list 0/1 */
1467     x264_reference_build_list( h, h->fdec->i_poc );
1468
1469     /* Init the rate control */
1470     x264_ratecontrol_start( h, h->fenc->i_qpplus1 );
1471     i_global_qp = x264_ratecontrol_qp( h );
1472
1473     pic_out->i_qpplus1 =
1474     h->fdec->i_qpplus1 = i_global_qp + 1;
1475
1476     if( h->sh.i_type == SLICE_TYPE_B )
1477         x264_macroblock_bipred_init( h );
1478
1479     /* ------------------------ Create slice header  ----------------------- */
1480     x264_slice_init( h, i_nal_type, i_global_qp );
1481
1482     if( i_nal_ref_idc != NAL_PRIORITY_DISPOSABLE )
1483         h->i_frame_num++;
1484
1485     /* ---------------------- Write the bitstream -------------------------- */
1486     /* Init bitstream context */
1487     h->out.i_nal = 0;
1488     bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );
1489
1490     if(h->param.b_aud){
1491         int pic_type;
1492
1493         if(h->sh.i_type == SLICE_TYPE_I)
1494             pic_type = 0;
1495         else if(h->sh.i_type == SLICE_TYPE_P)
1496             pic_type = 1;
1497         else if(h->sh.i_type == SLICE_TYPE_B)
1498             pic_type = 2;
1499         else
1500             pic_type = 7;
1501
1502         x264_nal_start(h, NAL_AUD, NAL_PRIORITY_DISPOSABLE);
1503         bs_write(&h->out.bs, 3, pic_type);
1504         bs_rbsp_trailing(&h->out.bs);
1505         x264_nal_end(h);
1506     }
1507
1508     h->i_nal_type = i_nal_type;
1509     h->i_nal_ref_idc = i_nal_ref_idc;
1510
1511     /* Write SPS and PPS */
1512     if( i_nal_type == NAL_SLICE_IDR && h->param.b_repeat_headers )
1513     {
1514         if( h->fenc->i_frame == 0 )
1515         {
1516             /* identify ourself */
1517             x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
1518             x264_sei_version_write( h, &h->out.bs );
1519             x264_nal_end( h );
1520         }
1521
1522         /* generate sequence parameters */
1523         x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
1524         x264_sps_write( &h->out.bs, h->sps );
1525         x264_nal_end( h );
1526
1527         /* generate picture parameters */
1528         x264_nal_start( h, NAL_PPS, NAL_PRIORITY_HIGHEST );
1529         x264_pps_write( &h->out.bs, h->pps );
1530         x264_nal_end( h );
1531     }
1532
1533     /* Write frame */
1534     if( h->param.i_threads > 1 )
1535     {
1536         x264_pthread_create( &h->thread_handle, NULL, (void*)x264_slices_write, h );
1537         h->b_thread_active = 1;
1538     }
1539     else
1540         x264_slices_write( h );
1541
1542     /* restore CPU state (before using float again) */
1543     x264_emms();
1544
1545     if( h->sh.i_type == SLICE_TYPE_P && !h->param.rc.b_stat_read
1546         && h->param.i_scenecut_threshold >= 0
1547         && !h->param.b_pre_scenecut )
1548     {
1549         const int *mbs = h->stat.frame.i_mb_count;
1550         int i_mb_i = mbs[I_16x16] + mbs[I_8x8] + mbs[I_4x4];
1551         int i_mb_p = mbs[P_L0] + mbs[P_8x8];
1552         int i_mb_s = mbs[P_SKIP];
1553         int i_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
1554         int64_t i_inter_cost = h->stat.frame.i_inter_cost;
1555         int64_t i_intra_cost = h->stat.frame.i_intra_cost;
1556
1557         float f_bias;
1558         int i_gop_size = h->fenc->i_frame - h->frames.i_last_idr;
1559         float f_thresh_max = h->param.i_scenecut_threshold / 100.0;
1560         /* magic numbers pulled out of thin air */
1561         float f_thresh_min = f_thresh_max * h->param.i_keyint_min
1562                              / ( h->param.i_keyint_max * 4 );
1563         if( h->param.i_keyint_min == h->param.i_keyint_max )
1564              f_thresh_min= f_thresh_max;
1565
1566         /* macroblock_analyse() doesn't further analyse skipped mbs,
1567          * so we have to guess their cost */
1568         if( h->stat.frame.i_mbs_analysed > 0 )
1569             i_intra_cost = i_intra_cost * i_mb / h->stat.frame.i_mbs_analysed;
1570
1571         if( i_gop_size < h->param.i_keyint_min / 4 )
1572             f_bias = f_thresh_min / 4;
1573         else if( i_gop_size <= h->param.i_keyint_min )
1574             f_bias = f_thresh_min * i_gop_size / h->param.i_keyint_min;
1575         else
1576         {
1577             f_bias = f_thresh_min
1578                      + ( f_thresh_max - f_thresh_min )
1579                        * ( i_gop_size - h->param.i_keyint_min )
1580                        / ( h->param.i_keyint_max - h->param.i_keyint_min );
1581         }
1582         f_bias = X264_MIN( f_bias, 1.0 );
1583
1584         /* Bad P will be reencoded as I */
1585         if( h->stat.frame.i_mbs_analysed > 0 &&
1586             i_inter_cost >= (1.0 - f_bias) * i_intra_cost )
1587         {
1588             int b;
1589
1590             x264_log( h, X264_LOG_DEBUG, "scene cut at %d Icost:%.0f Pcost:%.0f ratio:%.4f bias:%.4f gop:%d (imb:%d pmb:%d smb:%d)\n",
1591                       h->fenc->i_frame,
1592                       (double)i_intra_cost, (double)i_inter_cost,
1593                       1. - (double)i_inter_cost / i_intra_cost,
1594                       f_bias, i_gop_size,
1595                       i_mb_i, i_mb_p, i_mb_s );
1596
1597             /* Restore frame num */
1598             h->i_frame_num--;
1599
1600             for( b = 0; h->frames.current[b] && IS_X264_TYPE_B( h->frames.current[b]->i_type ); b++ );
1601             if( b > 0 )
1602             {
1603                 /* If using B-frames, force GOP to be closed.
1604                  * Even if this frame is going to be I and not IDR, forcing a
1605                  * P-frame before the scenecut will probably help compression.
1606                  *
1607                  * We don't yet know exactly which frame is the scene cut, so
1608                  * we can't assign an I-frame. Instead, change the previous
1609                  * B-frame to P, and rearrange coding order. */
1610
1611                 if( h->param.b_bframe_adaptive || b > 1 )
1612                     h->fenc->i_type = X264_TYPE_AUTO;
1613                 x264_frame_sort_pts( h->frames.current );
1614                 x264_frame_unshift( h->frames.next, h->fenc );
1615                 h->fenc = h->frames.current[b-1];
1616                 h->frames.current[b-1] = NULL;
1617                 h->fenc->i_type = X264_TYPE_P;
1618                 x264_frame_sort_dts( h->frames.current );
1619             }
1620             /* Do IDR if needed */
1621             else if( i_gop_size >= h->param.i_keyint_min )
1622             {
1623                 /* Reset */
1624                 h->i_frame_num = 0;
1625
1626                 /* Reinit field of fenc */
1627                 h->fenc->i_type = X264_TYPE_IDR;
1628                 h->fenc->i_poc = 0;
1629
1630                 /* Put enqueued frames back in the pool */
1631                 while( h->frames.current[0] )
1632                     x264_frame_push( h->frames.next, x264_frame_shift( h->frames.current ) );
1633                 x264_frame_sort_pts( h->frames.next );
1634             }
1635             else
1636             {
1637                 h->fenc->i_type = X264_TYPE_I;
1638             }
1639             goto do_encode;
1640         }
1641     }
1642
1643     x264_encoder_frame_end( thread_oldest, thread_current, pp_nal, pi_nal, pic_out );
1644     return 0;
1645 }
1646
1647 static void x264_encoder_frame_end( x264_t *h, x264_t *thread_current,
1648                                     x264_nal_t **pp_nal, int *pi_nal,
1649                                     x264_picture_t *pic_out )
1650 {
1651     int i, i_list;
1652     char psz_message[80];
1653
1654     if( h->b_thread_active )
1655     {
1656         x264_pthread_join( h->thread_handle, NULL );
1657         h->b_thread_active = 0;
1658     }
1659     if( !h->out.i_nal )
1660     {
1661         pic_out->i_type = X264_TYPE_AUTO;
1662         return;
1663     }
1664
1665     x264_frame_push_unused( thread_current, h->fenc );
1666
1667     /* End bitstream, set output  */
1668     *pi_nal = h->out.i_nal;
1669     *pp_nal = h->out.nal;
1670     h->out.i_nal = 0;
1671
1672     /* Set output picture properties */
1673     if( h->sh.i_type == SLICE_TYPE_I )
1674         pic_out->i_type = h->i_nal_type == NAL_SLICE_IDR ? X264_TYPE_IDR : X264_TYPE_I;
1675     else if( h->sh.i_type == SLICE_TYPE_P )
1676         pic_out->i_type = X264_TYPE_P;
1677     else
1678         pic_out->i_type = X264_TYPE_B;
1679     pic_out->i_pts = h->fenc->i_pts;
1680
1681     pic_out->img.i_plane = h->fdec->i_plane;
1682     for(i = 0; i < 4; i++){
1683         pic_out->img.i_stride[i] = h->fdec->i_stride[i];
1684         pic_out->img.plane[i] = h->fdec->plane[i];
1685     }
1686
1687     /* ---------------------- Update encoder state ------------------------- */
1688
1689     /* update rc */
1690     x264_emms();
1691     x264_ratecontrol_end( h, h->out.i_frame_size * 8 );
1692
1693     /* restore CPU state (before using float again) */
1694     x264_emms();
1695
1696     x264_noise_reduction_update( thread_current );
1697
1698     /* ---------------------- Compute/Print statistics --------------------- */
1699     x264_thread_sync_stat( h, h->thread[0] );
1700
1701     /* Slice stat */
1702     h->stat.i_slice_count[h->sh.i_type]++;
1703     h->stat.i_slice_size[h->sh.i_type] += h->out.i_frame_size + NALU_OVERHEAD;
1704     h->stat.f_slice_qp[h->sh.i_type] += h->fdec->f_qp_avg_aq;
1705
1706     for( i = 0; i < X264_MBTYPE_MAX; i++ )
1707         h->stat.i_mb_count[h->sh.i_type][i] += h->stat.frame.i_mb_count[i];
1708     for( i = 0; i < X264_PARTTYPE_MAX; i++ )
1709         h->stat.i_mb_partition[h->sh.i_type][i] += h->stat.frame.i_mb_partition[i];
1710     for( i = 0; i < 2; i++ )
1711         h->stat.i_mb_count_8x8dct[i] += h->stat.frame.i_mb_count_8x8dct[i];
1712     if( h->sh.i_type != SLICE_TYPE_I )
1713         for( i_list = 0; i_list < 2; i_list++ )
1714             for( i = 0; i < 32; i++ )
1715                 h->stat.i_mb_count_ref[h->sh.i_type][i_list][i] += h->stat.frame.i_mb_count_ref[i_list][i];
1716     if( h->sh.i_type == SLICE_TYPE_P )
1717         h->stat.i_consecutive_bframes[h->fdec->i_frame - h->fref0[0]->i_frame - 1]++;
1718     if( h->sh.i_type == SLICE_TYPE_B )
1719     {
1720         h->stat.i_direct_frames[ h->sh.b_direct_spatial_mv_pred ] ++;
1721         if( h->mb.b_direct_auto_write )
1722         {
1723             //FIXME somewhat arbitrary time constants
1724             if( h->stat.i_direct_score[0] + h->stat.i_direct_score[1] > h->mb.i_mb_count )
1725             {
1726                 for( i = 0; i < 2; i++ )
1727                     h->stat.i_direct_score[i] = h->stat.i_direct_score[i] * 9/10;
1728             }
1729             for( i = 0; i < 2; i++ )
1730                 h->stat.i_direct_score[i] += h->stat.frame.i_direct_score[i];
1731         }
1732     }
1733
1734     psz_message[0] = '\0';
1735     if( h->param.analyse.b_psnr )
1736     {
1737         int64_t ssd[3] = {
1738             h->stat.frame.i_ssd[0],
1739             h->stat.frame.i_ssd[1],
1740             h->stat.frame.i_ssd[2],
1741         };
1742
1743         h->stat.i_ssd_global[h->sh.i_type] += ssd[0] + ssd[1] + ssd[2];
1744         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 );
1745         h->stat.f_psnr_mean_y[h->sh.i_type] += x264_psnr( ssd[0], h->param.i_width * h->param.i_height );
1746         h->stat.f_psnr_mean_u[h->sh.i_type] += x264_psnr( ssd[1], h->param.i_width * h->param.i_height / 4 );
1747         h->stat.f_psnr_mean_v[h->sh.i_type] += x264_psnr( ssd[2], h->param.i_width * h->param.i_height / 4 );
1748
1749         snprintf( psz_message, 80, " PSNR Y:%5.2f U:%5.2f V:%5.2f",
1750                   x264_psnr( ssd[0], h->param.i_width * h->param.i_height ),
1751                   x264_psnr( ssd[1], h->param.i_width * h->param.i_height / 4),
1752                   x264_psnr( ssd[2], h->param.i_width * h->param.i_height / 4) );
1753     }
1754
1755     if( h->param.analyse.b_ssim )
1756     {
1757         double ssim_y = h->stat.frame.f_ssim
1758                       / (((h->param.i_width-6)>>2) * ((h->param.i_height-6)>>2));
1759         h->stat.f_ssim_mean_y[h->sh.i_type] += ssim_y;
1760         snprintf( psz_message + strlen(psz_message), 80 - strlen(psz_message),
1761                   " SSIM Y:%.5f", ssim_y );
1762     }
1763     psz_message[79] = '\0';
1764
1765     x264_log( h, X264_LOG_DEBUG,
1766                   "frame=%4d QP=%.2f NAL=%d Slice:%c Poc:%-3d I:%-4d P:%-4d SKIP:%-4d size=%d bytes%s\n",
1767               h->i_frame,
1768               h->fdec->f_qp_avg_aq,
1769               h->i_nal_ref_idc,
1770               h->sh.i_type == SLICE_TYPE_I ? 'I' : (h->sh.i_type == SLICE_TYPE_P ? 'P' : 'B' ),
1771               h->fdec->i_poc,
1772               h->stat.frame.i_mb_count_i,
1773               h->stat.frame.i_mb_count_p,
1774               h->stat.frame.i_mb_count_skip,
1775               h->out.i_frame_size,
1776               psz_message );
1777
1778     // keep stats all in one place
1779     x264_thread_sync_stat( h->thread[0], h );
1780     // for the use of the next frame
1781     x264_thread_sync_stat( thread_current, h );
1782
1783 #ifdef DEBUG_MB_TYPE
1784 {
1785     static const char mb_chars[] = { 'i', 'i', 'I', 'C', 'P', '8', 'S',
1786         'D', '<', 'X', 'B', 'X', '>', 'B', 'B', 'B', 'B', '8', 'S' };
1787     int mb_xy;
1788     for( mb_xy = 0; mb_xy < h->sps->i_mb_width * h->sps->i_mb_height; mb_xy++ )
1789     {
1790         if( h->mb.type[mb_xy] < X264_MBTYPE_MAX && h->mb.type[mb_xy] >= 0 )
1791             fprintf( stderr, "%c ", mb_chars[ h->mb.type[mb_xy] ] );
1792         else
1793             fprintf( stderr, "? " );
1794
1795         if( (mb_xy+1) % h->sps->i_mb_width == 0 )
1796             fprintf( stderr, "\n" );
1797     }
1798 }
1799 #endif
1800
1801     if( h->param.psz_dump_yuv )
1802         x264_frame_dump( h );
1803 }
1804
1805 static void x264_print_intra( int64_t *i_mb_count, double i_count, int b_print_pcm, char *intra )
1806 {
1807     intra += sprintf( intra, "I16..4%s: %4.1f%% %4.1f%% %4.1f%%",
1808         b_print_pcm ? "..PCM" : "",
1809         i_mb_count[I_16x16]/ i_count,
1810         i_mb_count[I_8x8]  / i_count,
1811         i_mb_count[I_4x4]  / i_count );
1812     if( b_print_pcm )
1813         sprintf( intra, " %4.1f%%", i_mb_count[I_PCM]  / i_count );
1814 }
1815
1816 /****************************************************************************
1817  * x264_encoder_close:
1818  ****************************************************************************/
1819 void    x264_encoder_close  ( x264_t *h )
1820 {
1821     int64_t i_yuv_size = 3 * h->param.i_width * h->param.i_height / 2;
1822     int64_t i_mb_count_size[2][7] = {{0}};
1823     char buf[200];
1824     int i, j, i_list, i_type;
1825     int b_print_pcm = h->stat.i_mb_count[SLICE_TYPE_I][I_PCM]
1826                    || h->stat.i_mb_count[SLICE_TYPE_P][I_PCM]
1827                    || h->stat.i_mb_count[SLICE_TYPE_B][I_PCM];
1828
1829     for( i=0; i<h->param.i_threads; i++ )
1830     {
1831         // don't strictly have to wait for the other threads, but it's simpler than canceling them
1832         if( h->thread[i]->b_thread_active )
1833         {
1834             x264_pthread_join( h->thread[i]->thread_handle, NULL );
1835             assert( h->thread[i]->fenc->i_reference_count == 1 );
1836             x264_frame_delete( h->thread[i]->fenc );
1837         }
1838     }
1839
1840     /* Slices used and PSNR */
1841     for( i=0; i<5; i++ )
1842     {
1843         static const int slice_order[] = { SLICE_TYPE_I, SLICE_TYPE_SI, SLICE_TYPE_P, SLICE_TYPE_SP, SLICE_TYPE_B };
1844         static const char *slice_name[] = { "P", "B", "I", "SP", "SI" };
1845         int i_slice = slice_order[i];
1846
1847         if( h->stat.i_slice_count[i_slice] > 0 )
1848         {
1849             const int i_count = h->stat.i_slice_count[i_slice];
1850             if( h->param.analyse.b_psnr )
1851             {
1852                 x264_log( h, X264_LOG_INFO,
1853                           "slice %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",
1854                           slice_name[i_slice],
1855                           i_count,
1856                           h->stat.f_slice_qp[i_slice] / i_count,
1857                           (double)h->stat.i_slice_size[i_slice] / i_count,
1858                           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,
1859                           h->stat.f_psnr_average[i_slice] / i_count,
1860                           x264_psnr( h->stat.i_ssd_global[i_slice], i_count * i_yuv_size ) );
1861             }
1862             else
1863             {
1864                 x264_log( h, X264_LOG_INFO,
1865                           "slice %s:%-5d Avg QP:%5.2f  size:%6.0f\n",
1866                           slice_name[i_slice],
1867                           i_count,
1868                           h->stat.f_slice_qp[i_slice] / i_count,
1869                           (double)h->stat.i_slice_size[i_slice] / i_count );
1870             }
1871         }
1872     }
1873     if( h->param.i_bframe && h->stat.i_slice_count[SLICE_TYPE_P] )
1874     {
1875         char *p = buf;
1876         int den = 0;
1877         // weight by number of frames (including the P-frame) that are in a sequence of N B-frames
1878         for( i=0; i<=h->param.i_bframe; i++ )
1879             den += (i+1) * h->stat.i_consecutive_bframes[i];
1880         for( i=0; i<=h->param.i_bframe; i++ )
1881             p += sprintf( p, " %4.1f%%", 100. * (i+1) * h->stat.i_consecutive_bframes[i] / den );
1882         x264_log( h, X264_LOG_INFO, "consecutive B-frames:%s\n", buf );
1883     }
1884
1885     for( i_type = 0; i_type < 2; i_type++ )
1886         for( i = 0; i < X264_PARTTYPE_MAX; i++ )
1887         {
1888             if( i == D_DIRECT_8x8 ) continue; /* direct is counted as its own type */
1889             i_mb_count_size[i_type][x264_mb_partition_pixel_table[i]] += h->stat.i_mb_partition[i_type][i];
1890         }
1891
1892     /* MB types used */
1893     if( h->stat.i_slice_count[SLICE_TYPE_I] > 0 )
1894     {
1895         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_I];
1896         double i_count = h->stat.i_slice_count[SLICE_TYPE_I] * h->mb.i_mb_count / 100.0;
1897         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
1898         x264_log( h, X264_LOG_INFO, "mb I  %s\n", buf );
1899     }
1900     if( h->stat.i_slice_count[SLICE_TYPE_P] > 0 )
1901     {
1902         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_P];
1903         double i_count = h->stat.i_slice_count[SLICE_TYPE_P] * h->mb.i_mb_count / 100.0;
1904         int64_t *i_mb_size = i_mb_count_size[SLICE_TYPE_P];
1905         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
1906         x264_log( h, X264_LOG_INFO,
1907                   "mb P  %s  P16..4: %4.1f%% %4.1f%% %4.1f%% %4.1f%% %4.1f%%    skip:%4.1f%%\n",
1908                   buf,
1909                   i_mb_size[PIXEL_16x16] / (i_count*4),
1910                   (i_mb_size[PIXEL_16x8] + i_mb_size[PIXEL_8x16]) / (i_count*4),
1911                   i_mb_size[PIXEL_8x8] / (i_count*4),
1912                   (i_mb_size[PIXEL_8x4] + i_mb_size[PIXEL_4x8]) / (i_count*4),
1913                   i_mb_size[PIXEL_4x4] / (i_count*4),
1914                   i_mb_count[P_SKIP] / i_count );
1915     }
1916     if( h->stat.i_slice_count[SLICE_TYPE_B] > 0 )
1917     {
1918         int64_t *i_mb_count = h->stat.i_mb_count[SLICE_TYPE_B];
1919         double i_count = h->stat.i_slice_count[SLICE_TYPE_B] * h->mb.i_mb_count / 100.0;
1920         double i_mb_list_count;
1921         int64_t *i_mb_size = i_mb_count_size[SLICE_TYPE_B];
1922         int64_t list_count[3] = {0}; /* 0 == L0, 1 == L1, 2 == BI */
1923         x264_print_intra( i_mb_count, i_count, b_print_pcm, buf );
1924         for( i = 0; i < X264_PARTTYPE_MAX; i++ )
1925             for( j = 0; j < 2; j++ )
1926             {
1927                 int l0 = x264_mb_type_list0_table[i][j];
1928                 int l1 = x264_mb_type_list1_table[i][j];
1929                 if( l0 || l1 )
1930                     list_count[l1+l0*l1] += h->stat.i_mb_count[SLICE_TYPE_B][i] * 2;
1931             }
1932         list_count[0] += h->stat.i_mb_partition[SLICE_TYPE_B][D_L0_8x8];
1933         list_count[1] += h->stat.i_mb_partition[SLICE_TYPE_B][D_L1_8x8];
1934         list_count[2] += h->stat.i_mb_partition[SLICE_TYPE_B][D_BI_8x8];
1935         i_mb_count[B_DIRECT] += (h->stat.i_mb_partition[SLICE_TYPE_B][D_DIRECT_8x8]+2)/4;
1936         i_mb_list_count = (list_count[0] + list_count[1] + list_count[2]) / 100.0;
1937         x264_log( h, X264_LOG_INFO,
1938                   "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",
1939                   buf,
1940                   i_mb_size[PIXEL_16x16] / (i_count*4),
1941                   (i_mb_size[PIXEL_16x8] + i_mb_size[PIXEL_8x16]) / (i_count*4),
1942                   i_mb_size[PIXEL_8x8] / (i_count*4),
1943                   i_mb_count[B_DIRECT] / i_count,
1944                   i_mb_count[B_SKIP]   / i_count,
1945                   list_count[0] / i_mb_list_count,
1946                   list_count[1] / i_mb_list_count,
1947                   list_count[2] / i_mb_list_count );
1948     }
1949
1950     x264_ratecontrol_summary( h );
1951
1952     if( h->stat.i_slice_count[SLICE_TYPE_I] + h->stat.i_slice_count[SLICE_TYPE_P] + h->stat.i_slice_count[SLICE_TYPE_B] > 0 )
1953     {
1954         const int i_count = h->stat.i_slice_count[SLICE_TYPE_I] +
1955                             h->stat.i_slice_count[SLICE_TYPE_P] +
1956                             h->stat.i_slice_count[SLICE_TYPE_B];
1957         float fps = (float) h->param.i_fps_num / h->param.i_fps_den;
1958 #define SUM3(p) (p[SLICE_TYPE_I] + p[SLICE_TYPE_P] + p[SLICE_TYPE_B])
1959 #define SUM3b(p,o) (p[SLICE_TYPE_I][o] + p[SLICE_TYPE_P][o] + p[SLICE_TYPE_B][o])
1960         float f_bitrate = fps * SUM3(h->stat.i_slice_size) / i_count / 125;
1961
1962         if( h->pps->b_transform_8x8_mode )
1963         {
1964             int64_t i_i8x8 = SUM3b( h->stat.i_mb_count, I_8x8 );
1965             int64_t i_intra = i_i8x8 + SUM3b( h->stat.i_mb_count, I_4x4 )
1966                                      + SUM3b( h->stat.i_mb_count, I_16x16 );
1967             x264_log( h, X264_LOG_INFO, "8x8 transform  intra:%.1f%%  inter:%.1f%%\n",
1968                       100. * i_i8x8 / i_intra,
1969                       100. * h->stat.i_mb_count_8x8dct[1] / h->stat.i_mb_count_8x8dct[0] );
1970         }
1971
1972         if( h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_AUTO
1973             && h->stat.i_slice_count[SLICE_TYPE_B] )
1974         {
1975             x264_log( h, X264_LOG_INFO, "direct mvs  spatial:%.1f%%  temporal:%.1f%%\n",
1976                       h->stat.i_direct_frames[1] * 100. / h->stat.i_slice_count[SLICE_TYPE_B],
1977                       h->stat.i_direct_frames[0] * 100. / h->stat.i_slice_count[SLICE_TYPE_B] );
1978         }
1979
1980         for( i_list = 0; i_list < 2; i_list++ )
1981         {
1982             int i_slice;
1983             for( i_slice = 0; i_slice < 2; i_slice++ )
1984             {
1985                 char *p = buf;
1986                 int64_t i_den = 0;
1987                 int i_max = 0;
1988                 for( i = 0; i < 32; i++ )
1989                     if( h->stat.i_mb_count_ref[i_slice][i_list][i] )
1990                     {
1991                         i_den += h->stat.i_mb_count_ref[i_slice][i_list][i];
1992                         i_max = i;
1993                     }
1994                 if( i_max == 0 )
1995                     continue;
1996                 for( i = 0; i <= i_max; i++ )
1997                     p += sprintf( p, " %4.1f%%", 100. * h->stat.i_mb_count_ref[i_slice][i_list][i] / i_den );
1998                 x264_log( h, X264_LOG_INFO, "ref %c L%d %s\n", "PB"[i_slice], i_list, buf );
1999             }
2000         }
2001
2002         if( h->param.analyse.b_ssim )
2003         {
2004             x264_log( h, X264_LOG_INFO,
2005                       "SSIM Mean Y:%.7f\n",
2006                       SUM3( h->stat.f_ssim_mean_y ) / i_count );
2007         }
2008         if( h->param.analyse.b_psnr )
2009         {
2010             x264_log( h, X264_LOG_INFO,
2011                       "PSNR Mean Y:%6.3f U:%6.3f V:%6.3f Avg:%6.3f Global:%6.3f kb/s:%.2f\n",
2012                       SUM3( h->stat.f_psnr_mean_y ) / i_count,
2013                       SUM3( h->stat.f_psnr_mean_u ) / i_count,
2014                       SUM3( h->stat.f_psnr_mean_v ) / i_count,
2015                       SUM3( h->stat.f_psnr_average ) / i_count,
2016                       x264_psnr( SUM3( h->stat.i_ssd_global ), i_count * i_yuv_size ),
2017                       f_bitrate );
2018         }
2019         else
2020             x264_log( h, X264_LOG_INFO, "kb/s:%.1f\n", f_bitrate );
2021     }
2022
2023     /* rc */
2024     x264_ratecontrol_delete( h );
2025
2026     /* param */
2027     if( h->param.rc.psz_stat_out )
2028         free( h->param.rc.psz_stat_out );
2029     if( h->param.rc.psz_stat_in )
2030         free( h->param.rc.psz_stat_in );
2031
2032     x264_cqm_delete( h );
2033
2034     if( h->param.i_threads > 1)
2035         h = h->thread[ h->i_thread_phase % h->param.i_threads ];
2036
2037     /* frames */
2038     for( i = 0; h->frames.current[i]; i++ )
2039     {
2040         assert( h->frames.current[i]->i_reference_count == 1 );
2041         x264_frame_delete( h->frames.current[i] );
2042     }
2043     for( i = 0; h->frames.next[i]; i++ )
2044     {
2045         assert( h->frames.next[i]->i_reference_count == 1 );
2046         x264_frame_delete( h->frames.next[i] );
2047     }
2048     for( i = 0; h->frames.unused[i]; i++ )
2049     {
2050         assert( h->frames.unused[i]->i_reference_count == 0 );
2051         x264_frame_delete( h->frames.unused[i] );
2052     }
2053
2054     h = h->thread[0];
2055
2056     for( i = h->param.i_threads - 1; i >= 0; i-- )
2057     {
2058         x264_frame_t **frame;
2059
2060         for( frame = h->thread[i]->frames.reference; *frame; frame++ )
2061         {
2062             assert( (*frame)->i_reference_count > 0 );
2063             (*frame)->i_reference_count--;
2064             if( (*frame)->i_reference_count == 0 )
2065                 x264_frame_delete( *frame );
2066         }
2067         frame = &h->thread[i]->fdec;
2068         assert( (*frame)->i_reference_count > 0 );
2069         (*frame)->i_reference_count--;
2070         if( (*frame)->i_reference_count == 0 )
2071             x264_frame_delete( *frame );
2072
2073         x264_macroblock_cache_end( h->thread[i] );
2074         x264_free( h->thread[i]->out.p_bitstream );
2075         x264_free( h->thread[i] );
2076     }
2077 }