encoder.c 64.5 KB
Newer Older
Laurent Aimar's avatar
Laurent Aimar committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
/*****************************************************************************
 * x264: h264 encoder
 *****************************************************************************
 * Copyright (C) 2003 Laurent Aimar
 * $Id: encoder.c,v 1.1 2004/06/03 19:27:08 fenrir Exp $
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#include <stdio.h>
#include <string.h>
#include <math.h>

28 29
#include "common/common.h"
#include "common/cpu.h"
Laurent Aimar's avatar
Laurent Aimar committed
30 31 32 33 34 35

#include "set.h"
#include "analyse.h"
#include "ratecontrol.h"
#include "macroblock.h"

Loren Merritt's avatar
Loren Merritt committed
36 37 38 39
#if VISUALIZE
#include "common/visualize.h"
#endif

Laurent Aimar's avatar
Laurent Aimar committed
40
//#define DEBUG_MB_TYPE
Loren Merritt's avatar
Loren Merritt committed
41
//#define DEBUG_DUMP_FRAME
42
//#define DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
43

44
#ifdef DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
45 46 47 48 49 50 51 52 53 54 55 56
static int64_t i_mtime_encode_frame = 0;
static int64_t i_mtime_analyse = 0;
static int64_t i_mtime_encode = 0;
static int64_t i_mtime_write = 0;
static int64_t i_mtime_filter = 0;
#define TIMER_START( d ) \
    { \
        int64_t d##start = x264_mdate();

#define TIMER_STOP( d ) \
        d += x264_mdate() - d##start;\
    }
57 58 59 60
#else
#define TIMER_START( d )
#define TIMER_STOP( d )
#endif
Laurent Aimar's avatar
Laurent Aimar committed
61

62
#define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
Laurent Aimar's avatar
Laurent Aimar committed
63 64 65 66 67 68

/****************************************************************************
 *
 ******************************* x264 libs **********************************
 *
 ****************************************************************************/
69 70 71 72 73 74 75 76 77 78
static float x264_psnr( int64_t i_sqe, int64_t i_size )
{
    double f_mse = (double)i_sqe / ((double)65025.0 * (double)i_size);
    if( f_mse <= 0.0000000001 ) /* Max 100dB */
        return 100;

    return (float)(-10.0 * log( f_mse ) / log( 10.0 ));
}

#ifdef DEBUG_DUMP_FRAME
Laurent Aimar's avatar
Laurent Aimar committed
79 80
static void x264_frame_dump( x264_t *h, x264_frame_t *fr, char *name )
{
81
    FILE *f = fopen( name, "r+b" );
Laurent Aimar's avatar
Laurent Aimar committed
82
    int i, y;
83 84
    if( !f )
        return;
Laurent Aimar's avatar
Laurent Aimar committed
85

86 87
    /* Write the frame in display order */
    fseek( f, fr->i_frame * h->param.i_height * h->param.i_width * 3 / 2, SEEK_SET );
Laurent Aimar's avatar
Laurent Aimar committed
88 89 90 91 92 93 94 95 96 97 98 99 100 101

    for( i = 0; i < fr->i_plane; i++ )
    {
        for( y = 0; y < h->param.i_height / ( i == 0 ? 1 : 2 ); y++ )
        {
            fwrite( &fr->plane[i][y*fr->i_stride[i]], 1, h->param.i_width / ( i == 0 ? 1 : 2 ), f );
        }
    }
    fclose( f );
}
#endif


/* Fill "default" values */
102
static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
Laurent Aimar's avatar
Laurent Aimar committed
103
                                    x264_sps_t *sps, x264_pps_t *pps,
104
                                    int i_type, int i_idr_pic_id, int i_frame, int i_qp )
Laurent Aimar's avatar
Laurent Aimar committed
105
{
106
    x264_param_t *param = &h->param;
107
    int i;
108

Laurent Aimar's avatar
Laurent Aimar committed
109 110 111 112 113 114
    /* First we fill all field */
    sh->sps = sps;
    sh->pps = pps;

    sh->i_type      = i_type;
    sh->i_first_mb  = 0;
Loren Merritt's avatar
Loren Merritt committed
115
    sh->i_last_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
116 117 118 119
    sh->i_pps_id    = pps->i_id;

    sh->i_frame_num = i_frame;

120 121 122
    sh->b_mbaff = h->param.b_interlaced;
    sh->b_field_pic = 0;    /* no field support for now */
    sh->b_bottom_field = 0; /* not yet used */
Laurent Aimar's avatar
Laurent Aimar committed
123 124 125 126 127 128 129 130 131 132 133

    sh->i_idr_pic_id = i_idr_pic_id;

    /* poc stuff, fixed later */
    sh->i_poc_lsb = 0;
    sh->i_delta_poc_bottom = 0;
    sh->i_delta_poc[0] = 0;
    sh->i_delta_poc[1] = 0;

    sh->i_redundant_pic_cnt = 0;

Loren Merritt's avatar
Loren Merritt committed
134 135 136 137 138 139 140 141
    if( !h->mb.b_direct_auto_read )
    {
        if( h->mb.b_direct_auto_write )
            sh->b_direct_spatial_mv_pred = ( h->stat.i_direct_score[1] > h->stat.i_direct_score[0] );
        else
            sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
    }
    /* else b_direct_spatial_mv_pred was read from the 2pass statsfile */
Laurent Aimar's avatar
Laurent Aimar committed
142 143 144 145 146

    sh->b_num_ref_idx_override = 0;
    sh->i_num_ref_idx_l0_active = 1;
    sh->i_num_ref_idx_l1_active = 1;

147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
    sh->b_ref_pic_list_reordering_l0 = h->b_ref_reorder[0];
    sh->b_ref_pic_list_reordering_l1 = h->b_ref_reorder[1];

    /* If the ref list isn't in the default order, construct reordering header */
    /* List1 reordering isn't needed yet */
    if( sh->b_ref_pic_list_reordering_l0 )
    {
        int pred_frame_num = i_frame;
        for( i = 0; i < h->i_ref0; i++ )
        {
            int diff = h->fref0[i]->i_frame_num - pred_frame_num;
            if( diff == 0 )
                x264_log( h, X264_LOG_ERROR, "diff frame num == 0\n" );
            sh->ref_pic_list_order[0][i].idc = ( diff > 0 );
            sh->ref_pic_list_order[0][i].arg = abs( diff ) - 1;
            pred_frame_num = h->fref0[i]->i_frame_num;
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
166 167
    sh->i_cabac_init_idc = param->i_cabac_init_idc;

168
    sh->i_qp = i_qp;
169
    sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
Laurent Aimar's avatar
Laurent Aimar committed
170 171 172
    sh->b_sp_for_swidth = 0;
    sh->i_qs_delta = 0;

173 174 175
    /* If effective qp <= 15, deblocking would have no effect anyway */
    if( param->b_deblocking_filter
        && ( h->mb.b_variable_qp
176
        || 15 < i_qp + 2 * X264_MAX(param->i_deblocking_filter_alphac0, param->i_deblocking_filter_beta) ) )
Laurent Aimar's avatar
Laurent Aimar committed
177 178 179 180 181 182 183 184 185 186 187 188 189
    {
        sh->i_disable_deblocking_filter_idc = 0;
    }
    else
    {
        sh->i_disable_deblocking_filter_idc = 1;
    }
    sh->i_alpha_c0_offset = param->i_deblocking_filter_alphac0 << 1;
    sh->i_beta_offset = param->i_deblocking_filter_beta << 1;
}

static void x264_slice_header_write( bs_t *s, x264_slice_header_t *sh, int i_nal_ref_idc )
{
190 191
    int i;

192 193 194 195 196 197 198 199
    if( sh->b_mbaff )
    {
        assert( sh->i_first_mb % (2*sh->sps->i_mb_width) == 0 );
        bs_write_ue( s, sh->i_first_mb >> 1 );
    }
    else
        bs_write_ue( s, sh->i_first_mb );

Laurent Aimar's avatar
Laurent Aimar committed
200 201 202 203
    bs_write_ue( s, sh->i_type + 5 );   /* same type things */
    bs_write_ue( s, sh->i_pps_id );
    bs_write( s, sh->sps->i_log2_max_frame_num, sh->i_frame_num );

204 205 206 207 208 209 210
    if( !sh->sps->b_frame_mbs_only )
    {
        bs_write1( s, sh->b_field_pic );
        if ( sh->b_field_pic )
            bs_write1( s, sh->b_bottom_field );
    }

Laurent Aimar's avatar
Laurent Aimar committed
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
    if( sh->i_idr_pic_id >= 0 ) /* NAL IDR */
    {
        bs_write_ue( s, sh->i_idr_pic_id );
    }

    if( sh->sps->i_poc_type == 0 )
    {
        bs_write( s, sh->sps->i_log2_max_poc_lsb, sh->i_poc_lsb );
        if( sh->pps->b_pic_order && !sh->b_field_pic )
        {
            bs_write_se( s, sh->i_delta_poc_bottom );
        }
    }
    else if( sh->sps->i_poc_type == 1 && !sh->sps->b_delta_pic_order_always_zero )
    {
        bs_write_se( s, sh->i_delta_poc[0] );
        if( sh->pps->b_pic_order && !sh->b_field_pic )
        {
            bs_write_se( s, sh->i_delta_poc[1] );
        }
    }

    if( sh->pps->b_redundant_pic_cnt )
    {
        bs_write_ue( s, sh->i_redundant_pic_cnt );
    }

    if( sh->i_type == SLICE_TYPE_B )
    {
        bs_write1( s, sh->b_direct_spatial_mv_pred );
    }
    if( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP || sh->i_type == SLICE_TYPE_B )
    {
        bs_write1( s, sh->b_num_ref_idx_override );
        if( sh->b_num_ref_idx_override )
        {
            bs_write_ue( s, sh->i_num_ref_idx_l0_active - 1 );
            if( sh->i_type == SLICE_TYPE_B )
            {
                bs_write_ue( s, sh->i_num_ref_idx_l1_active - 1 );
            }
        }
    }

    /* ref pic list reordering */
    if( sh->i_type != SLICE_TYPE_I )
    {
258 259
        bs_write1( s, sh->b_ref_pic_list_reordering_l0 );
        if( sh->b_ref_pic_list_reordering_l0 )
Laurent Aimar's avatar
Laurent Aimar committed
260
        {
261 262 263 264 265 266 267
            for( i = 0; i < sh->i_num_ref_idx_l0_active; i++ )
            {
                bs_write_ue( s, sh->ref_pic_list_order[0][i].idc );
                bs_write_ue( s, sh->ref_pic_list_order[0][i].arg );
                        
            }
            bs_write_ue( s, 3 );
Laurent Aimar's avatar
Laurent Aimar committed
268 269 270 271
        }
    }
    if( sh->i_type == SLICE_TYPE_B )
    {
272 273
        bs_write1( s, sh->b_ref_pic_list_reordering_l1 );
        if( sh->b_ref_pic_list_reordering_l1 )
Laurent Aimar's avatar
Laurent Aimar committed
274
        {
275 276 277 278 279 280
            for( i = 0; i < sh->i_num_ref_idx_l1_active; i++ )
            {
                bs_write_ue( s, sh->ref_pic_list_order[1][i].idc );
                bs_write_ue( s, sh->ref_pic_list_order[1][i].arg );
            }
            bs_write_ue( s, 3 );
Laurent Aimar's avatar
Laurent Aimar committed
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
        }
    }

    if( ( sh->pps->b_weighted_pred && ( sh->i_type == SLICE_TYPE_P || sh->i_type == SLICE_TYPE_SP ) ) ||
        ( sh->pps->b_weighted_bipred == 1 && sh->i_type == SLICE_TYPE_B ) )
    {
        /* FIXME */
    }

    if( i_nal_ref_idc != 0 )
    {
        if( sh->i_idr_pic_id >= 0 )
        {
            bs_write1( s, 0 );  /* no output of prior pics flag */
            bs_write1( s, 0 );  /* long term reference flag */
        }
        else
        {
            bs_write1( s, 0 );  /* adaptive_ref_pic_marking_mode_flag */
        }
    }

    if( sh->pps->b_cabac && sh->i_type != SLICE_TYPE_I )
    {
        bs_write_ue( s, sh->i_cabac_init_idc );
    }
    bs_write_se( s, sh->i_qp_delta );      /* slice qp delta */

    if( sh->pps->b_deblocking_filter_control )
    {
        bs_write_ue( s, sh->i_disable_deblocking_filter_idc );
        if( sh->i_disable_deblocking_filter_idc != 1 )
        {
            bs_write_se( s, sh->i_alpha_c0_offset >> 1 );
            bs_write_se( s, sh->i_beta_offset >> 1 );
        }
    }
}

/****************************************************************************
 *
 ****************************************************************************
 ****************************** External API*********************************
 ****************************************************************************
 *
 ****************************************************************************/

328
static int x264_validate_parameters( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
329
{
330
    if( h->param.i_width <= 0 || h->param.i_height <= 0 )
Laurent Aimar's avatar
Laurent Aimar committed
331
    {
332
        x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
333 334
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
335 336
    }

Loren Merritt's avatar
Loren Merritt committed
337
    if( h->param.i_width % 2 || h->param.i_height % 2 )
Laurent Aimar's avatar
Laurent Aimar committed
338
    {
Loren Merritt's avatar
Loren Merritt committed
339
        x264_log( h, X264_LOG_ERROR, "width or height not divisible by 2 (%dx%d)\n",
340 341
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
342
    }
343
    if( h->param.i_csp != X264_CSP_I420 )
Laurent Aimar's avatar
Laurent Aimar committed
344
    {
345
        x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
346
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
347 348
    }

349 350
    if( h->param.i_threads == 0 )
        h->param.i_threads = x264_cpu_num_processors();
Loren Merritt's avatar
Loren Merritt committed
351
    h->param.i_threads = x264_clip3( h->param.i_threads, 1, X264_SLICE_MAX );
352
    h->param.i_threads = X264_MIN( h->param.i_threads, (h->param.i_height + 15) >> (4 + h->param.b_interlaced) );
353
#ifndef HAVE_PTHREAD
Loren Merritt's avatar
Loren Merritt committed
354 355 356 357 358 359 360
    if( h->param.i_threads > 1 )
    {
        x264_log( h, X264_LOG_WARNING, "not compiled with pthread support!\n");
        x264_log( h, X264_LOG_WARNING, "multislicing anyway, but you won't see any speed gain.\n" );
    }
#endif

361 362 363 364 365 366 367 368 369 370 371 372 373 374
    if( h->param.b_interlaced )
    {
        if( h->param.analyse.i_me_method == X264_ME_ESA )
        {
            x264_log( h, X264_LOG_WARNING, "interlace + me=esa is not implemented\n" );
            h->param.analyse.i_me_method = X264_ME_UMH;
        }
        if( h->param.analyse.i_direct_mv_pred > X264_DIRECT_PRED_SPATIAL )
        {
            x264_log( h, X264_LOG_WARNING, "interlace + direct=temporal is not implemented\n" );
            h->param.analyse.i_direct_mv_pred = X264_DIRECT_PRED_SPATIAL;
        }
    }

375 376 377 378 379
    if( h->param.rc.i_rc_method < 0 || h->param.rc.i_rc_method > 2 )
    {
        x264_log( h, X264_LOG_ERROR, "invalid RC method\n" );
        return -1;
    }
380 381
    h->param.rc.i_rf_constant = x264_clip3( h->param.rc.i_rf_constant, 0, 51 );
    h->param.rc.i_qp_constant = x264_clip3( h->param.rc.i_qp_constant, 0, 51 );
382 383 384 385
    if( h->param.rc.i_rc_method == X264_RC_CRF )
        h->param.rc.i_qp_constant = h->param.rc.i_rf_constant;
    if( (h->param.rc.i_rc_method == X264_RC_CQP || h->param.rc.i_rc_method == X264_RC_CRF)
        && h->param.rc.i_qp_constant == 0 )
Loren Merritt's avatar
Loren Merritt committed
386 387
    {
        h->mb.b_lossless = 1;
Loren Merritt's avatar
Loren Merritt committed
388
        h->param.i_cqm_preset = X264_CQM_FLAT;
Loren Merritt's avatar
Loren Merritt committed
389
        h->param.psz_cqm_file = NULL;
390
        h->param.rc.i_rc_method = X264_RC_CQP;
Loren Merritt's avatar
Loren Merritt committed
391 392
        h->param.rc.f_ip_factor = 1;
        h->param.rc.f_pb_factor = 1;
393
        h->param.analyse.b_transform_8x8 = 0;
Loren Merritt's avatar
Loren Merritt committed
394
        h->param.analyse.b_psnr = 0;
395
        h->param.analyse.b_ssim = 0;
396
        h->param.analyse.i_chroma_qp_offset = 0;
397
        h->param.analyse.i_trellis = 0;
Loren Merritt's avatar
Loren Merritt committed
398
        h->param.analyse.b_fast_pskip = 0;
399
        h->param.analyse.i_noise_reduction = 0;
400
        h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 6 );
Loren Merritt's avatar
Loren Merritt committed
401 402
    }

Loren Merritt's avatar
Loren Merritt committed
403 404 405 406 407 408 409
    if( ( h->param.i_width % 16 || h->param.i_height % 16 ) && !h->mb.b_lossless )
    {
        x264_log( h, X264_LOG_WARNING, 
                  "width or height not divisible by 16 (%dx%d), compression will suffer.\n",
                  h->param.i_width, h->param.i_height );
    }

Loren Merritt's avatar
Loren Merritt committed
410
    h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
411 412 413
    if( h->param.i_keyint_max <= 0 )
        h->param.i_keyint_max = 1;
    h->param.i_keyint_min = x264_clip3( h->param.i_keyint_min, 1, h->param.i_keyint_max/2+1 );
414

Loren Merritt's avatar
Loren Merritt committed
415
    h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
416
    h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
417
    h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
418
    h->param.b_bframe_adaptive = h->param.b_bframe_adaptive && h->param.i_bframe > 0;
419
    h->param.analyse.b_weighted_bipred = h->param.analyse.b_weighted_bipred && h->param.i_bframe > 0;
Loren Merritt's avatar
Loren Merritt committed
420 421 422
    h->mb.b_direct_auto_write = h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_AUTO
                                && h->param.i_bframe
                                && ( h->param.rc.b_stat_write || !h->param.rc.b_stat_read );
Laurent Aimar's avatar
Laurent Aimar committed
423 424 425 426

    h->param.i_deblocking_filter_alphac0 = x264_clip3( h->param.i_deblocking_filter_alphac0, -6, 6 );
    h->param.i_deblocking_filter_beta    = x264_clip3( h->param.i_deblocking_filter_beta, -6, 6 );

427
    h->param.i_cabac_init_idc = x264_clip3( h->param.i_cabac_init_idc, 0, 2 );
Laurent Aimar's avatar
Laurent Aimar committed
428

Loren Merritt's avatar
Loren Merritt committed
429 430 431
    if( h->param.i_cqm_preset < X264_CQM_FLAT || h->param.i_cqm_preset > X264_CQM_CUSTOM )
        h->param.i_cqm_preset = X264_CQM_FLAT;

432 433
    if( h->param.analyse.i_me_method < X264_ME_DIA ||
        h->param.analyse.i_me_method > X264_ME_ESA )
434
        h->param.analyse.i_me_method = X264_ME_HEX;
435 436 437
    if( h->param.analyse.i_me_range < 4 )
        h->param.analyse.i_me_range = 4;
    if( h->param.analyse.i_me_range > 16 && h->param.analyse.i_me_method <= X264_ME_HEX )
438
        h->param.analyse.i_me_range = 16;
439
    h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 7 );
440 441 442 443 444
    h->param.analyse.b_bframe_rdo = h->param.analyse.b_bframe_rdo && h->param.analyse.i_subpel_refine >= 6;
    h->param.analyse.b_mixed_references = h->param.analyse.b_mixed_references && h->param.i_frame_reference > 1;
    h->param.analyse.inter &= X264_ANALYSE_PSUB16x16|X264_ANALYSE_PSUB8x8|X264_ANALYSE_BSUB16x16|
                              X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
    h->param.analyse.intra &= X264_ANALYSE_I4x4|X264_ANALYSE_I8x8;
445 446
    if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
        h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
447 448 449 450 451
    if( !h->param.analyse.b_transform_8x8 )
    {
        h->param.analyse.inter &= ~X264_ANALYSE_I8x8;
        h->param.analyse.intra &= ~X264_ANALYSE_I8x8;
    }
452
    h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
Loren Merritt's avatar
Loren Merritt committed
453 454
    if( !h->param.b_cabac )
        h->param.analyse.i_trellis = 0;
455
    h->param.analyse.i_trellis = x264_clip3( h->param.analyse.i_trellis, 0, 2 );
456
    h->param.analyse.i_noise_reduction = x264_clip3( h->param.analyse.i_noise_reduction, 0, 1<<16 );
457

458 459 460 461 462 463 464 465 466 467 468 469 470 471 472
    {
        const x264_level_t *l = x264_levels;
        while( l->level_idc != 0 && l->level_idc != h->param.i_level_idc )
            l++;
        if( l->level_idc == 0 )
        {
            x264_log( h, X264_LOG_ERROR, "invalid level_idc: %d\n", h->param.i_level_idc );
            return -1;
        }
        if( h->param.analyse.i_mv_range <= 0 )
            h->param.analyse.i_mv_range = l->mv_range;
        else
            h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 2048);
    }

Loren Merritt's avatar
Loren Merritt committed
473 474 475 476 477
    if( h->param.rc.f_qblur < 0 )
        h->param.rc.f_qblur = 0;
    if( h->param.rc.f_complexity_blur < 0 )
        h->param.rc.f_complexity_blur = 0;

478 479
    h->param.i_sps_id &= 31;

480 481 482 483 484 485
    if( h->param.i_log_level < X264_LOG_INFO )
    {
        h->param.analyse.b_psnr = 0;
        h->param.analyse.b_ssim = 0;
    }

486 487 488 489
    /* ensure the booleans are 0 or 1 so they can be used in math */
#define BOOLIFY(x) h->param.x = !!h->param.x
    BOOLIFY( b_cabac );
    BOOLIFY( b_deblocking_filter );
490
    BOOLIFY( b_interlaced );
491 492 493 494 495 496 497 498
    BOOLIFY( analyse.b_transform_8x8 );
    BOOLIFY( analyse.b_bidir_me );
    BOOLIFY( analyse.b_chroma_me );
    BOOLIFY( analyse.b_fast_pskip );
    BOOLIFY( rc.b_stat_write );
    BOOLIFY( rc.b_stat_read );
#undef BOOLIFY

499 500 501
    return 0;
}

502 503 504 505 506 507 508
static void mbcmp_init( x264_t *h )
{
    memcpy( h->pixf.mbcmp,
            ( h->mb.b_lossless || h->param.analyse.i_subpel_refine <= 1 ) ? h->pixf.sad : h->pixf.satd,
            sizeof(h->pixf.mbcmp) );
}

509 510 511 512 513 514
/****************************************************************************
 * x264_encoder_open:
 ****************************************************************************/
x264_t *x264_encoder_open   ( x264_param_t *param )
{
    x264_t *h = x264_malloc( sizeof( x264_t ) );
515 516 517
    int i;

    memset( h, 0, sizeof( x264_t ) );
518 519 520 521 522 523 524 525 526 527

    /* Create a copy of param */
    memcpy( &h->param, param, sizeof( x264_param_t ) );

    if( x264_validate_parameters( h ) < 0 )
    {
        x264_free( h );
        return NULL;
    }

528 529 530 531 532 533 534
    if( h->param.psz_cqm_file )
        if( x264_cqm_parse_file( h, h->param.psz_cqm_file ) < 0 )
        {
            x264_free( h );
            return NULL;
        }

535 536 537 538 539 540 541
    if( h->param.rc.psz_stat_out )
        h->param.rc.psz_stat_out = strdup( h->param.rc.psz_stat_out );
    if( h->param.rc.psz_stat_in )
        h->param.rc.psz_stat_in = strdup( h->param.rc.psz_stat_in );
    if( h->param.rc.psz_rc_eq )
        h->param.rc.psz_rc_eq = strdup( h->param.rc.psz_rc_eq );

542 543 544
    /* VUI */
    if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
    {
545 546
        int i_w = param->vui.i_sar_width;
        int i_h = param->vui.i_sar_height;
547

Loren Merritt's avatar
Loren Merritt committed
548
        x264_reduce_fraction( &i_w, &i_h );
549

550
        while( i_w > 65535 || i_h > 65535 )
551
        {
552 553
            i_w /= 2;
            i_h /= 2;
554 555 556 557
        }

        h->param.vui.i_sar_width = 0;
        h->param.vui.i_sar_height = 0;
558
        if( i_w == 0 || i_h == 0 )
559
        {
560
            x264_log( h, X264_LOG_WARNING, "cannot create valid sample aspect ratio\n" );
561 562 563
        }
        else
        {
564 565 566
            x264_log( h, X264_LOG_INFO, "using SAR=%d/%d\n", i_w, i_h );
            h->param.vui.i_sar_width = i_w;
            h->param.vui.i_sar_height = i_h;
567 568 569
        }
    }

Loren Merritt's avatar
Loren Merritt committed
570
    x264_reduce_fraction( &h->param.i_fps_num, &h->param.i_fps_den );
571

Laurent Aimar's avatar
Laurent Aimar committed
572 573
    /* Init x264_t */
    h->out.i_nal = 0;
574
    h->out.i_bitstream = X264_MAX( 1000000, h->param.i_width * h->param.i_height * 1.7
575
        * ( h->param.rc.i_rc_method == X264_RC_ABR ? pow( 0.5, h->param.rc.i_qp_min )
576
          : pow( 0.5, h->param.rc.i_qp_constant ) * X264_MAX( 1, h->param.rc.f_ip_factor )));
Laurent Aimar's avatar
Laurent Aimar committed
577 578 579 580 581 582 583
    h->out.p_bitstream = x264_malloc( h->out.i_bitstream );

    h->i_frame = 0;
    h->i_frame_num = 0;
    h->i_idr_pic_id = 0;

    h->sps = &h->sps_array[0];
584
    x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
Laurent Aimar's avatar
Laurent Aimar committed
585 586

    h->pps = &h->pps_array[0];
587
    x264_pps_init( h->pps, h->param.i_sps_id, &h->param, h->sps);
Loren Merritt's avatar
Loren Merritt committed
588

589 590
    x264_validate_levels( h );

Loren Merritt's avatar
Loren Merritt committed
591
    x264_cqm_init( h );
592 593
    
    h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
594 595

    /* Init frames. */
596 597 598 599
    h->frames.i_delay = h->param.i_bframe;
    h->frames.i_max_ref0 = h->param.i_frame_reference;
    h->frames.i_max_ref1 = h->sps->vui.i_num_reorder_frames;
    h->frames.i_max_dpb  = h->sps->vui.i_max_dec_frame_buffering + 1;
600
    h->frames.b_have_lowres = !h->param.rc.b_stat_read
601 602 603
        && ( h->param.rc.i_rc_method == X264_RC_ABR
          || h->param.rc.i_rc_method == X264_RC_CRF
          || h->param.b_bframe_adaptive );
604

605
    for( i = 0; i < X264_BFRAME_MAX + 3; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
606 607 608 609 610
    {
        h->frames.current[i] = NULL;
        h->frames.next[i]    = NULL;
        h->frames.unused[i]  = NULL;
    }
611
    for( i = 0; i < 1 + h->frames.i_delay; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
612 613
    {
        h->frames.unused[i] =  x264_frame_new( h );
614 615
        if( !h->frames.unused[i] )
            return NULL;
Laurent Aimar's avatar
Laurent Aimar committed
616
    }
617
    for( i = 0; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
618 619
    {
        h->frames.reference[i] = x264_frame_new( h );
620 621
        if( !h->frames.reference[i] )
            return NULL;
Laurent Aimar's avatar
Laurent Aimar committed
622
    }
623
    h->frames.reference[h->frames.i_max_dpb] = NULL;
624
    h->frames.i_last_idr = - h->param.i_keyint_max;
625
    h->frames.i_input    = 0;
626
    h->frames.last_nonb  = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
627 628 629 630 631 632

    h->i_ref0 = 0;
    h->i_ref1 = 0;

    h->fdec = h->frames.reference[0];

633
    if( x264_macroblock_cache_init( h ) < 0 )
634
        return NULL;
Loren Merritt's avatar
Loren Merritt committed
635
    x264_rdo_init( );
Laurent Aimar's avatar
Laurent Aimar committed
636 637 638

    /* init CPU functions */
    x264_predict_16x16_init( h->param.cpu, h->predict_16x16 );
639
    x264_predict_8x8c_init( h->param.cpu, h->predict_8x8c );
Laurent Aimar's avatar
Laurent Aimar committed
640 641 642 643 644
    x264_predict_8x8_init( h->param.cpu, h->predict_8x8 );
    x264_predict_4x4_init( h->param.cpu, h->predict_4x4 );

    x264_pixel_init( h->param.cpu, &h->pixf );
    x264_dct_init( h->param.cpu, &h->dctf );
645
    x264_mc_init( h->param.cpu, &h->mc );
Laurent Aimar's avatar
Laurent Aimar committed
646
    x264_csp_init( h->param.cpu, h->param.i_csp, &h->csp );
647
    x264_quant_init( h, h->param.cpu, &h->quantf );
Loren Merritt's avatar
Loren Merritt committed
648
    x264_deblock_init( h->param.cpu, &h->loopf );
649
    x264_dct_init_weights();
Laurent Aimar's avatar
Laurent Aimar committed
650

651
    mbcmp_init( h );
Loren Merritt's avatar
Loren Merritt committed
652

Laurent Aimar's avatar
Laurent Aimar committed
653
    /* rate control */
654 655
    if( x264_ratecontrol_new( h ) < 0 )
        return NULL;
656

657 658 659 660 661 662 663 664
    x264_log( h, X264_LOG_INFO, "using cpu capabilities %s%s%s%s%s%s\n",
             param->cpu&X264_CPU_MMX ? "MMX " : "",
             param->cpu&X264_CPU_MMXEXT ? "MMXEXT " : "",
             param->cpu&X264_CPU_SSE ? "SSE " : "",
             param->cpu&X264_CPU_SSE2 ? "SSE2 " : "",
             param->cpu&X264_CPU_3DNOW ? "3DNow! " : "",
             param->cpu&X264_CPU_ALTIVEC ? "Altivec " : "" );

Loren Merritt's avatar
Loren Merritt committed
665
    h->thread[0] = h;
666
    h->i_thread_num = 0;
667
    for( i = 1; i < h->param.i_threads; i++ )
Loren Merritt's avatar
Loren Merritt committed
668 669
        h->thread[i] = x264_malloc( sizeof(x264_t) );

670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
#ifdef DEBUG_DUMP_FRAME
    {
        /* create or truncate the reconstructed video file */
        FILE *f = fopen( "fdec.yuv", "w" );
        if( f )
            fclose( f );
        else
        {
            x264_log( h, X264_LOG_ERROR, "can't write to fdec.yuv\n" );
            x264_free( h );
            return NULL;
        }
    }
#endif

Laurent Aimar's avatar
Laurent Aimar committed
685 686 687
    return h;
}

688 689 690 691 692
/****************************************************************************
 * x264_encoder_reconfig:
 ****************************************************************************/
int x264_encoder_reconfig( x264_t *h, x264_param_t *param )
{
693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
#define COPY(var) h->param.var = param->var
    COPY( i_frame_reference ); // but never uses more refs than initially specified
    COPY( i_bframe_bias );
    COPY( i_scenecut_threshold );
    COPY( b_deblocking_filter );
    COPY( i_deblocking_filter_alphac0 );
    COPY( i_deblocking_filter_beta );
    COPY( analyse.intra );
    COPY( analyse.inter );
    COPY( analyse.i_direct_mv_pred );
    COPY( analyse.i_me_method );
    COPY( analyse.i_me_range );
    COPY( analyse.i_noise_reduction );
    COPY( analyse.i_subpel_refine );
    COPY( analyse.i_trellis );
    COPY( analyse.b_bidir_me );
    COPY( analyse.b_bframe_rdo );
    COPY( analyse.b_chroma_me );
    COPY( analyse.b_dct_decimate );
    COPY( analyse.b_fast_pskip );
    COPY( analyse.b_mixed_references );
#undef COPY

    if( h->pps->b_transform_8x8_mode )
        h->param.analyse.b_transform_8x8 = param->analyse.b_transform_8x8;
Loren Merritt's avatar
Loren Merritt committed
718

719
    mbcmp_init( h );
Loren Merritt's avatar
Loren Merritt committed
720

721 722 723
    return x264_validate_parameters( h );
}

Laurent Aimar's avatar
Laurent Aimar committed
724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759
/* internal usage */
static void x264_nal_start( x264_t *h, int i_type, int i_ref_idc )
{
    x264_nal_t *nal = &h->out.nal[h->out.i_nal];

    nal->i_ref_idc = i_ref_idc;
    nal->i_type    = i_type;

    bs_align_0( &h->out.bs );   /* not needed */

    nal->i_payload= 0;
    nal->p_payload= &h->out.p_bitstream[bs_pos( &h->out.bs) / 8];
}
static void x264_nal_end( x264_t *h )
{
    x264_nal_t *nal = &h->out.nal[h->out.i_nal];

    bs_align_0( &h->out.bs );   /* not needed */

    nal->i_payload = &h->out.p_bitstream[bs_pos( &h->out.bs)/8] - nal->p_payload;

    h->out.i_nal++;
}

/****************************************************************************
 * x264_encoder_headers:
 ****************************************************************************/
int x264_encoder_headers( x264_t *h, x264_nal_t **pp_nal, int *pi_nal )
{
    /* init bitstream context */
    h->out.i_nal = 0;
    bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );

    /* Put SPS and PPS */
    if( h->i_frame == 0 )
    {
760 761
        /* identify ourself */
        x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
762
        x264_sei_version_write( h, &h->out.bs );
763 764
        x264_nal_end( h );

Laurent Aimar's avatar
Laurent Aimar committed
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
        /* generate sequence parameters */
        x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
        x264_sps_write( &h->out.bs, h->sps );
        x264_nal_end( h );

        /* generate picture parameters */
        x264_nal_start( h, NAL_PPS, NAL_PRIORITY_HIGHEST );
        x264_pps_write( &h->out.bs, h->pps );
        x264_nal_end( h );
    }
    /* now set output*/
    *pi_nal = h->out.i_nal;
    *pp_nal = &h->out.nal[0];

    return 0;
}


static void x264_frame_put( x264_frame_t *list[X264_BFRAME_MAX], x264_frame_t *frame )
{
    int i = 0;
786
    while( list[i] ) i++;
Laurent Aimar's avatar
Laurent Aimar committed
787 788 789
    list[i] = frame;
}

790 791 792 793 794 795 796 797 798
static void x264_frame_push( x264_frame_t *list[X264_BFRAME_MAX], x264_frame_t *frame )
{
    int i = 0;
    while( list[i] ) i++;
    while( i-- )
        list[i+1] = list[i];
    list[0] = frame;
}

Laurent Aimar's avatar
Laurent Aimar committed
799 800 801 802
static x264_frame_t *x264_frame_get( x264_frame_t *list[X264_BFRAME_MAX+1] )
{
    x264_frame_t *frame = list[0];
    int i;
803
    for( i = 0; list[i]; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
804 805 806 807
        list[i] = list[i+1];
    return frame;
}

808
static void x264_frame_sort( x264_frame_t *list[X264_BFRAME_MAX+1], int b_dts )
809 810 811 812
{
    int i, b_ok;
    do {
        b_ok = 1;
813
        for( i = 0; list[i+1]; i++ )
814
        {
815 816 817 818 819
            int dtype = list[i]->i_type - list[i+1]->i_type;
            int dtime = list[i]->i_frame - list[i+1]->i_frame;
            int swap = b_dts ? dtype > 0 || ( dtype == 0 && dtime > 0 )
                             : dtime > 0;
            if( swap )
820
            {
Loren Merritt's avatar
Loren Merritt committed
821
                XCHG( x264_frame_t*, list[i], list[i+1] );
822 823 824 825 826
                b_ok = 0;
            }
        }
    } while( !b_ok );
}
827 828
#define x264_frame_sort_dts(list) x264_frame_sort(list, 1)
#define x264_frame_sort_pts(list) x264_frame_sort(list, 0)
829

830
static inline void x264_reference_build_list( x264_t *h, int i_poc, int i_slice_type )
Laurent Aimar's avatar
Laurent Aimar committed
831 832 833 834 835 836 837
{
    int i;
    int b_ok;

    /* build ref list 0/1 */
    h->i_ref0 = 0;
    h->i_ref1 = 0;
838
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
839 840 841 842 843 844 845 846 847 848 849 850 851
    {
        if( h->frames.reference[i]->i_poc >= 0 )
        {
            if( h->frames.reference[i]->i_poc < i_poc )
            {
                h->fref0[h->i_ref0++] = h->frames.reference[i];
            }
            else if( h->frames.reference[i]->i_poc > i_poc )
            {
                h->fref1[h->i_ref1++] = h->frames.reference[i];
            }
        }
    }
852

Laurent Aimar's avatar
Laurent Aimar committed
853 854 855 856 857 858 859 860
    /* Order ref0 from higher to lower poc */
    do
    {
        b_ok = 1;
        for( i = 0; i < h->i_ref0 - 1; i++ )
        {
            if( h->fref0[i]->i_poc < h->fref0[i+1]->i_poc )
            {
Loren Merritt's avatar
Loren Merritt committed
861
                XCHG( x264_frame_t*, h->fref0[i], h->fref0[i+1] );
Laurent Aimar's avatar
Laurent Aimar committed
862 863 864 865 866 867 868 869 870 871 872 873 874
                b_ok = 0;
                break;
            }
        }
    } while( !b_ok );
    /* Order ref1 from lower to higher poc (bubble sort) for B-frame */
    do
    {
        b_ok = 1;
        for( i = 0; i < h->i_ref1 - 1; i++ )
        {
            if( h->fref1[i]->i_poc > h->fref1[i+1]->i_poc )
            {
Loren Merritt's avatar
Loren Merritt committed
875
                XCHG( x264_frame_t*, h->fref1[i], h->fref1[i+1] );
Laurent Aimar's avatar
Laurent Aimar committed
876 877 878 879 880 881
                b_ok = 0;
                break;
            }
        }
    } while( !b_ok );

882 883 884 885 886
    /* In the standard, a P-frame's ref list is sorted by frame_num.
     * We use POC, but check whether explicit reordering is needed */
    h->b_ref_reorder[0] =
    h->b_ref_reorder[1] = 0;
    if( i_slice_type == SLICE_TYPE_P )
Laurent Aimar's avatar
Laurent Aimar committed
887
    {
888 889 890 891 892 893
        for( i = 0; i < h->i_ref0 - 1; i++ )
            if( h->fref0[i]->i_frame_num < h->fref0[i+1]->i_frame_num )
            {
                h->b_ref_reorder[0] = 1;
                break;
            }
Laurent Aimar's avatar
Laurent Aimar committed
894
    }
895 896

    h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
897
    h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
898
    h->i_ref0 = X264_MIN( h->i_ref0, h->param.i_frame_reference ); // if reconfig() has lowered the limit
899
    h->i_ref0 = X264_MIN( h->i_ref0, 16 - h->i_ref1 );
900 901
    h->mb.pic.i_fref[0] = h->i_ref0;
    h->mb.pic.i_fref[1] = h->i_ref1;
Laurent Aimar's avatar
Laurent Aimar committed
902 903
}

904
static inline void x264_fdec_deblock( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
905 906
{
    /* apply deblocking filter to the current decoded picture */
907
    if( !h->sh.i_disable_deblocking_filter_idc )
Laurent Aimar's avatar
Laurent Aimar committed
908 909 910 911 912
    {
        TIMER_START( i_mtime_filter );
        x264_frame_deblocking_filter( h, h->sh.i_type );
        TIMER_STOP( i_mtime_filter );
    }
913 914 915 916 917 918 919 920
}

static inline void x264_reference_update( x264_t *h )
{
    int i;

    x264_fdec_deblock( h );

Laurent Aimar's avatar
Laurent Aimar committed
921
    /* expand border */
922
    x264_frame_expand_border( h, h->fdec );
Laurent Aimar's avatar
Laurent Aimar committed
923

924
    /* create filtered images */
925
    x264_frame_filter( h->param.cpu, h->fdec, h->sh.b_mbaff );
926 927

    /* expand border of filtered images */
928
    x264_frame_expand_border_filtered( h, h->fdec );
929

930 931
    /* move lowres copy of the image to the ref frame */
    for( i = 0; i < 4; i++)
932
    {
Loren Merritt's avatar
Loren Merritt committed
933
        XCHG( uint8_t*, h->fdec->lowres[i], h->fenc->lowres[i] );
934 935
        XCHG( uint8_t*, h->fdec->buffer_lowres[i], h->fenc->buffer_lowres[i] );
    }
936 937 938 939 940

    /* adaptive B decision needs a pointer, since it can't use the ref lists */
    if( h->sh.i_type != SLICE_TYPE_B )
        h->frames.last_nonb = h->fdec;

Laurent Aimar's avatar
Laurent Aimar committed
941
    /* move frame in the buffer */
942 943
    h->fdec = h->frames.reference[h->frames.i_max_dpb-1];
    for( i = h->frames.i_max_dpb-1; i > 0; i-- )
Laurent Aimar's avatar
Laurent Aimar committed
944 945 946 947 948 949 950 951 952 953 954
    {
        h->frames.reference[i] = h->frames.reference[i-1];
    }
    h->frames.reference[0] = h->fdec;
}

static inline void x264_reference_reset( x264_t *h )
{
    int i;

    /* reset ref pictures */
955
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
956 957 958 959 960 961 962 963 964 965 966
    {
        h->frames.reference[i]->i_poc = -1;
    }
    h->frames.reference[0]->i_poc = 0;
}

static inline void x264_slice_init( x264_t *h, int i_nal_type, int i_slice_type, int i_global_qp )
{
    /* ------------------------ Create slice header  ----------------------- */
    if( i_nal_type == NAL_SLICE_IDR )
    {
967
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, i_slice_type, h->i_idr_pic_id, h->i_frame_num, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
968 969

        /* increment id */
970
        h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
Laurent Aimar's avatar
Laurent Aimar committed
971 972 973
    }
    else
    {
974
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, i_slice_type, -1, h->i_frame_num, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
975 976 977 978 979 980 981

        /* always set the real higher num of ref frame used */
        h->sh.b_num_ref_idx_override = 1;
        h->sh.i_num_ref_idx_l0_active = h->i_ref0 <= 0 ? 1 : h->i_ref0;
        h->sh.i_num_ref_idx_l1_active = h->i_ref1 <= 0 ? 1 : h->i_ref1;
    }

982 983
    h->fdec->i_frame_num = h->sh.i_frame_num;

Laurent Aimar's avatar
Laurent Aimar committed
984 985 986 987 988 989 990 991 992 993 994 995 996 997
    if( h->sps->i_poc_type == 0 )
    {
        h->sh.i_poc_lsb = h->fdec->i_poc & ( (1 << h->sps->i_log2_max_poc_lsb) - 1 );
        h->sh.i_delta_poc_bottom = 0;   /* XXX won't work for field */
    }
    else if( h->sps->i_poc_type == 1 )
    {
        /* FIXME TODO FIXME */
    }
    else
    {
        /* Nothing to do ? */
    }

998
    x264_macroblock_slice_init( h );
Laurent Aimar's avatar
Laurent Aimar committed
999 1000
}

Loren Merritt's avatar
Loren Merritt committed
1001
static int x264_slice_write( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
1002 1003 1004
{
    int i_skip;
    int mb_xy;
1005
    int i;
Laurent Aimar's avatar
Laurent Aimar committed
1006

1007
    /* init stats */
Loren Merritt's avatar
Loren Merritt committed
1008
    memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
Laurent Aimar's avatar
Laurent Aimar committed
1009 1010

    /* Slice */
Loren Merritt's avatar
Loren Merritt committed
1011
    x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1012 1013

    /* Slice header */
Loren Merritt's avatar
Loren Merritt committed
1014
    x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1015 1016
    if( h->param.b_cabac )
    {
1017
        /* alignment needed */
Laurent Aimar's avatar
Laurent Aimar committed
1018 1019 1020
        bs_align_1( &h->out.bs );

        /* init cabac */
1021
        x264_cabac_context_init( &h->cabac, h->sh.i_type, h->sh.i_qp, h->sh.i_cabac_init_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1022 1023
        x264_cabac_encode_init ( &h->cabac, &h->out.bs );
    }
1024
    h->mb.i_last_qp = h->sh.i_qp;
Laurent Aimar's avatar
Laurent Aimar committed
1025 1026
    h->mb.i_last_dqp = 0;

1027
    for( mb_xy = h->sh.i_first_mb, i_skip = 0; mb_xy < h->sh.i_last_mb; )
Laurent Aimar's avatar
Laurent Aimar committed
1028 1029 1030 1031
    {
        const int i_mb_y = mb_xy / h->sps->i_mb_width;
        const int i_mb_x = mb_xy % h->sps->i_mb_width;

1032 1033
        int mb_spos = bs_pos(&h->out.bs);

Laurent Aimar's avatar
Laurent Aimar committed
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
        /* load cache */
        x264_macroblock_cache_load( h, i_mb_x, i_mb_y );

        /* analyse parameters
         * Slice I: choose I_4x4 or I_16x16 mode
         * Slice P: choose between using P mode or intra (4x4 or 16x16)
         * */
        TIMER_START( i_mtime_analyse );
        x264_macroblock_analyse( h );
        TIMER_STOP( i_mtime_analyse );

Loren Merritt's avatar
Loren Merritt committed
1045
        /* encode this macroblock -> be careful it can change the mb type to P_SKIP if needed */
Laurent Aimar's avatar
Laurent Aimar committed
1046 1047 1048 1049 1050
        TIMER_START( i_mtime_encode );
        x264_macroblock_encode( h );
        TIMER_STOP( i_mtime_encode );

        TIMER_START( i_mtime_write );
Loren Merritt's avatar
Loren Merritt committed
1051
        if( h->param.b_cabac )
Laurent Aimar's avatar
Laurent Aimar committed
1052
        {
1053
            if( mb_xy > h->sh.i_first_mb && !(h->sh.b_mbaff && (i_mb_y&1)) )
Loren Merritt's avatar
Loren Merritt committed
1054
                x264_cabac_encode_terminal( &h->cabac, 0 );
Laurent Aimar's avatar
Laurent Aimar committed
1055

Loren Merritt's avatar
Loren Merritt committed
1056
            if( IS_SKIP( h->mb.i_type ) )
Laurent Aimar's avatar
Laurent Aimar committed
1057 1058 1059 1060 1061
                x264_cabac_mb_skip( h, 1 );
            else
            {
                if( h->sh.i_type != SLICE_TYPE_I )
                    x264_cabac_mb_skip( h, 0 );
1062
                x264_macroblock_write_cabac( h, &h->cabac );
Laurent Aimar's avatar
Laurent Aimar committed
1063
            }
Loren Merritt's avatar
Loren Merritt committed
1064 1065 1066 1067 1068
        }
        else
        {
            if( IS_SKIP( h->mb.i_type ) )
                i_skip++;
Laurent Aimar's avatar
Laurent Aimar committed
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
            else
            {
                if( h->sh.i_type != SLICE_TYPE_I )
                {
                    bs_write_ue( &h->out.bs, i_skip );  /* skip run */
                    i_skip = 0;
                }
                x264_macroblock_write_cavlc( h, &h->out.bs );
            }
        }
        TIMER_STOP( i_mtime_write );

Loren Merritt's avatar
Loren Merritt committed
1081 1082 1083 1084 1085
#if VISUALIZE
        if( h->param.b_visualize )
            x264_visualize_mb( h );
#endif

Laurent Aimar's avatar
Laurent Aimar committed
1086 1087 1088
        /* save cache */
        x264_macroblock_cache_save( h );

1089
        /* accumulate mb stats */
1090
        h->stat.frame.i_mb_count[h->mb.i_type]++;
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
        if( !IS_SKIP(h->mb.i_type) && !IS_INTRA(h->mb.i_type) && !IS_DIRECT(h->mb.i_type) )
        {
            if( h->mb.i_partition != D_8x8 )
                h->stat.frame.i_mb_count_size[ x264_mb_partition_pixel_table[ h->mb.i_partition ] ] += 4;
            else
                for( i = 0; i < 4; i++ )
                    h->stat.frame.i_mb_count_size[ x264_mb_partition_pixel_table[ h->mb.i_sub_partition[i] ] ] ++;
            if( h->param.i_frame_reference > 1 )
            {
                for( i = 0; i < 4; i++ )
                {
                    int i_ref = h->mb.cache.ref[0][ x264_scan8[4*i] ];
                    if( i_ref >= 0 )
                        h->stat.frame.i_mb_count_ref[i_ref] ++;
                }
            }
        }
1108 1109 1110 1111 1112
        if( h->mb.i_cbp_luma && !IS_INTRA(h->mb.i_type) )
        {
            h->stat.frame.i_mb_count_8x8dct[0] ++;
            h->stat.frame.i_mb_count_8x8dct[1] += h->mb.b_transform_8x8;
        }
1113

1114 1115
        if( h->mb.b_variable_qp )
            x264_ratecontrol_mb(h, bs_pos(&h->out.bs) - mb_spos);
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127

        if( h->sh.b_mbaff )
        {
            if( (i_mb_y&1) && i_mb_x == h->sps->i_mb_width - 1 )
                mb_xy++;
            else if( i_mb_y&1 )
                mb_xy += 1 - h->sps->i_mb_width;
            else
                mb_xy += h->sps->i_mb_width;
        }
        else
            mb_xy++;
Laurent Aimar's avatar
Laurent Aimar committed
1128 1129 1130 1131 1132