encoder.c 67.3 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

Loren Merritt's avatar
Loren Merritt committed
64 65 66 67
static void x264_encoder_frame_end( x264_t *h, x264_t *thread_current,
                                    x264_nal_t **pp_nal, int *pi_nal,
                                    x264_picture_t *pic_out );

Laurent Aimar's avatar
Laurent Aimar committed
68 69 70 71 72
/****************************************************************************
 *
 ******************************* x264 libs **********************************
 *
 ****************************************************************************/
73 74 75 76 77 78 79 80 81 82
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
83 84
static void x264_frame_dump( x264_t *h, x264_frame_t *fr, char *name )
{
85
    FILE *f = fopen( name, "r+b" );
Laurent Aimar's avatar
Laurent Aimar committed
86
    int i, y;
87 88
    if( !f )
        return;
Laurent Aimar's avatar
Laurent Aimar committed
89

90 91
    /* 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
92 93 94 95 96 97 98 99 100 101 102 103 104 105

    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 */
106
static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
Laurent Aimar's avatar
Laurent Aimar committed
107
                                    x264_sps_t *sps, x264_pps_t *pps,
Loren Merritt's avatar
Loren Merritt committed
108
                                    int i_idr_pic_id, int i_frame, int i_qp )
Laurent Aimar's avatar
Laurent Aimar committed
109
{
110
    x264_param_t *param = &h->param;
111
    int i;
112

Laurent Aimar's avatar
Laurent Aimar committed
113 114 115 116 117
    /* First we fill all field */
    sh->sps = sps;
    sh->pps = pps;

    sh->i_first_mb  = 0;
Loren Merritt's avatar
Loren Merritt committed
118
    sh->i_last_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
119 120 121 122
    sh->i_pps_id    = pps->i_id;

    sh->i_frame_num = i_frame;

123 124 125
    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
126 127 128 129 130 131 132 133 134 135 136

    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
137 138 139 140 141 142 143 144
    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
145 146 147 148 149

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

150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
    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
169 170
    sh->i_cabac_init_idc = param->i_cabac_init_idc;

171
    sh->i_qp = i_qp;
172
    sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
Laurent Aimar's avatar
Laurent Aimar committed
173 174 175
    sh->b_sp_for_swidth = 0;
    sh->i_qs_delta = 0;

176 177 178
    /* If effective qp <= 15, deblocking would have no effect anyway */
    if( param->b_deblocking_filter
        && ( h->mb.b_variable_qp
179
        || 15 < i_qp + 2 * X264_MAX(param->i_deblocking_filter_alphac0, param->i_deblocking_filter_beta) ) )
Laurent Aimar's avatar
Laurent Aimar committed
180 181 182 183 184 185 186 187 188 189 190 191 192
    {
        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 )
{
193 194
    int i;

195 196 197 198 199 200 201 202
    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
203 204 205 206
    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 );

207 208 209 210 211 212 213
    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
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260
    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 )
    {
261 262
        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
263
        {
264 265 266 267 268 269 270
            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
271 272 273 274
        }
    }
    if( sh->i_type == SLICE_TYPE_B )
    {
275 276
        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
277
        {
278 279 280 281 282 283
            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
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
        }
    }

    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*********************************
 ****************************************************************************
 *
 ****************************************************************************/

331
static int x264_validate_parameters( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
332
{
333
    if( h->param.i_width <= 0 || h->param.i_height <= 0 )
Laurent Aimar's avatar
Laurent Aimar committed
334
    {
335
        x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
336 337
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
338 339
    }

Loren Merritt's avatar
Loren Merritt committed
340
    if( h->param.i_width % 2 || h->param.i_height % 2 )
Laurent Aimar's avatar
Laurent Aimar committed
341
    {
Loren Merritt's avatar
Loren Merritt committed
342
        x264_log( h, X264_LOG_ERROR, "width or height not divisible by 2 (%dx%d)\n",
343 344
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
345
    }
346
    if( h->param.i_csp != X264_CSP_I420 )
Laurent Aimar's avatar
Laurent Aimar committed
347
    {
348
        x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
349
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
350 351
    }

352
    if( h->param.i_threads == 0 )
Loren Merritt's avatar
Loren Merritt committed
353 354
        h->param.i_threads = x264_cpu_num_processors() * 3/2;
    h->param.i_threads = x264_clip3( h->param.i_threads, 1, X264_THREAD_MAX );
Loren Merritt's avatar
Loren Merritt committed
355 356
    if( h->param.i_threads > 1 )
    {
Loren Merritt's avatar
Loren Merritt committed
357
#ifndef HAVE_PTHREAD
Loren Merritt's avatar
Loren Merritt committed
358
        x264_log( h, X264_LOG_WARNING, "not compiled with pthread support!\n");
Loren Merritt's avatar
Loren Merritt committed
359 360 361 362 363 364 365 366 367
        h->param.i_threads = 1;
#else
        if( h->param.analyse.i_me_method == X264_ME_ESA )
        {
            x264_log( h, X264_LOG_WARNING, "threads are not yet compatible with ESA\n");
            h->param.analyse.i_me_method = X264_ME_UMH;
        }
        if( h->param.i_scenecut_threshold >= 0 )
            h->param.b_pre_scenecut = 1;
Loren Merritt's avatar
Loren Merritt committed
368
#endif
Loren Merritt's avatar
Loren Merritt committed
369
    }
Loren Merritt's avatar
Loren Merritt committed
370

371 372 373 374 375 376 377 378 379 380 381 382 383 384
    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;
        }
    }

385 386 387 388 389
    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;
    }
Loren Merritt's avatar
Loren Merritt committed
390
    h->param.rc.f_rf_constant = x264_clip3f( h->param.rc.f_rf_constant, 0, 51 );
391
    h->param.rc.i_qp_constant = x264_clip3( h->param.rc.i_qp_constant, 0, 51 );
392
    if( h->param.rc.i_rc_method == X264_RC_CRF )
Loren Merritt's avatar
Loren Merritt committed
393
        h->param.rc.i_qp_constant = h->param.rc.f_rf_constant;
394 395
    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
396 397
    {
        h->mb.b_lossless = 1;
Loren Merritt's avatar
Loren Merritt committed
398
        h->param.i_cqm_preset = X264_CQM_FLAT;
Loren Merritt's avatar
Loren Merritt committed
399
        h->param.psz_cqm_file = NULL;
400
        h->param.rc.i_rc_method = X264_RC_CQP;
Loren Merritt's avatar
Loren Merritt committed
401 402
        h->param.rc.f_ip_factor = 1;
        h->param.rc.f_pb_factor = 1;
403
        h->param.analyse.b_transform_8x8 = 0;
Loren Merritt's avatar
Loren Merritt committed
404
        h->param.analyse.b_psnr = 0;
405
        h->param.analyse.b_ssim = 0;
406
        h->param.analyse.i_chroma_qp_offset = 0;
407
        h->param.analyse.i_trellis = 0;
Loren Merritt's avatar
Loren Merritt committed
408
        h->param.analyse.b_fast_pskip = 0;
409
        h->param.analyse.i_noise_reduction = 0;
410
        h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 6 );
Loren Merritt's avatar
Loren Merritt committed
411
    }
Loren Merritt's avatar
Loren Merritt committed
412 413 414 415 416 417 418 419
    if( h->param.rc.i_rc_method == X264_RC_CQP )
    {
        float qp_p = h->param.rc.i_qp_constant;
        float qp_i = qp_p - 6*log(h->param.rc.f_ip_factor)/log(2);
        float qp_b = qp_p + 6*log(h->param.rc.f_pb_factor)/log(2);
        h->param.rc.i_qp_min = x264_clip3( (int)(X264_MIN3( qp_p, qp_i, qp_b )), 0, 51 );
        h->param.rc.i_qp_max = x264_clip3( (int)(X264_MAX3( qp_p, qp_i, qp_b ) + .999), 0, 51 );
    }
Loren Merritt's avatar
Loren Merritt committed
420

Loren Merritt's avatar
Loren Merritt committed
421 422 423 424 425 426 427
    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
428
    h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
429 430 431
    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 );
432

Loren Merritt's avatar
Loren Merritt committed
433
    h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
434
    h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
435
    h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
436
    h->param.b_bframe_adaptive = h->param.b_bframe_adaptive && h->param.i_bframe > 0;
437
    h->param.analyse.b_weighted_bipred = h->param.analyse.b_weighted_bipred && h->param.i_bframe > 0;
Loren Merritt's avatar
Loren Merritt committed
438 439 440
    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 );
441 442
    if( h->param.i_scenecut_threshold < 0 )
        h->param.b_pre_scenecut = 0;
Laurent Aimar's avatar
Laurent Aimar committed
443 444 445

    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 );
446 447
    h->param.analyse.i_luma_deadzone[0] = x264_clip3( h->param.analyse.i_luma_deadzone[0], 0, 32 );
    h->param.analyse.i_luma_deadzone[1] = x264_clip3( h->param.analyse.i_luma_deadzone[1], 0, 32 );
Laurent Aimar's avatar
Laurent Aimar committed
448

449
    h->param.i_cabac_init_idc = x264_clip3( h->param.i_cabac_init_idc, 0, 2 );
Laurent Aimar's avatar
Laurent Aimar committed
450

Loren Merritt's avatar
Loren Merritt committed
451 452 453
    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;

454 455
    if( h->param.analyse.i_me_method < X264_ME_DIA ||
        h->param.analyse.i_me_method > X264_ME_ESA )
456
        h->param.analyse.i_me_method = X264_ME_HEX;
457 458 459
    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 )
460
        h->param.analyse.i_me_range = 16;
461
    h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 7 );
462 463 464 465 466
    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;
467 468
    if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
        h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
469 470 471 472 473
    if( !h->param.analyse.b_transform_8x8 )
    {
        h->param.analyse.inter &= ~X264_ANALYSE_I8x8;
        h->param.analyse.intra &= ~X264_ANALYSE_I8x8;
    }
474
    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
475 476
    if( !h->param.b_cabac )
        h->param.analyse.i_trellis = 0;
477
    h->param.analyse.i_trellis = x264_clip3( h->param.analyse.i_trellis, 0, 2 );
478
    h->param.analyse.i_noise_reduction = x264_clip3( h->param.analyse.i_noise_reduction, 0, 1<<16 );
479

480 481 482 483 484 485 486 487 488 489 490 491 492
    {
        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);
493 494
        if( h->param.analyse.i_direct_8x8_inference < 0 )
            h->param.analyse.i_direct_8x8_inference = l->direct8x8;
495 496
    }

Loren Merritt's avatar
Loren Merritt committed
497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519
    if( h->param.i_threads > 1 )
    {
        int r = h->param.analyse.i_mv_range_thread;
        int r2;
        if( r <= 0 )
        {
            // half of the available space is reserved and divided evenly among the threads,
            // the rest is allocated to whichever thread is far enough ahead to use it.
            // reserving more space increases quality for some videos, but costs more time
            // in thread synchronization.
            int max_range = (h->param.i_height + X264_THREAD_HEIGHT) / h->param.i_threads - X264_THREAD_HEIGHT;
            r = max_range / 2;
        }
        r = X264_MAX( r, h->param.analyse.i_me_range );
        r = X264_MIN( r, h->param.analyse.i_mv_range );
        // round up to use the whole mb row
        r2 = (r & ~15) + ((-X264_THREAD_HEIGHT) & 15);
        if( r2 < r )
            r2 += 16;
        x264_log( h, X264_LOG_DEBUG, "using mv_range_thread = %d\n", r2 );
        h->param.analyse.i_mv_range_thread = r2;
    }

Loren Merritt's avatar
Loren Merritt committed
520 521 522 523 524
    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;

525 526
    h->param.i_sps_id &= 31;

527 528 529 530 531 532
    if( h->param.i_log_level < X264_LOG_INFO )
    {
        h->param.analyse.b_psnr = 0;
        h->param.analyse.b_ssim = 0;
    }

533 534 535 536
    /* 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 );
537
    BOOLIFY( b_interlaced );
538
    BOOLIFY( analyse.b_transform_8x8 );
539
    BOOLIFY( analyse.i_direct_8x8_inference );
540 541 542 543 544 545 546
    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

547 548 549
    return 0;
}

550 551 552 553 554 555 556
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) );
}

557 558 559 560 561 562
/****************************************************************************
 * x264_encoder_open:
 ****************************************************************************/
x264_t *x264_encoder_open   ( x264_param_t *param )
{
    x264_t *h = x264_malloc( sizeof( x264_t ) );
563 564 565
    int i;

    memset( h, 0, sizeof( x264_t ) );
566 567 568 569 570 571 572 573 574 575

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

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

576 577 578 579 580 581 582
    if( h->param.psz_cqm_file )
        if( x264_cqm_parse_file( h, h->param.psz_cqm_file ) < 0 )
        {
            x264_free( h );
            return NULL;
        }

583 584 585 586 587 588 589
    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 );

590 591 592
    /* VUI */
    if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
    {
593 594
        int i_w = param->vui.i_sar_width;
        int i_h = param->vui.i_sar_height;
595

Loren Merritt's avatar
Loren Merritt committed
596
        x264_reduce_fraction( &i_w, &i_h );
597

598
        while( i_w > 65535 || i_h > 65535 )
599
        {
600 601
            i_w /= 2;
            i_h /= 2;
602 603 604 605
        }

        h->param.vui.i_sar_width = 0;
        h->param.vui.i_sar_height = 0;
606
        if( i_w == 0 || i_h == 0 )
607
        {
608
            x264_log( h, X264_LOG_WARNING, "cannot create valid sample aspect ratio\n" );
609 610 611
        }
        else
        {
612 613 614
            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;
615 616 617
        }
    }

Loren Merritt's avatar
Loren Merritt committed
618
    x264_reduce_fraction( &h->param.i_fps_num, &h->param.i_fps_den );
619

Laurent Aimar's avatar
Laurent Aimar committed
620 621 622 623 624 625
    /* Init x264_t */
    h->i_frame = 0;
    h->i_frame_num = 0;
    h->i_idr_pic_id = 0;

    h->sps = &h->sps_array[0];
626
    x264_sps_init( h->sps, h->param.i_sps_id, &h->param );
Laurent Aimar's avatar
Laurent Aimar committed
627 628

    h->pps = &h->pps_array[0];
629
    x264_pps_init( h->pps, h->param.i_sps_id, &h->param, h->sps);
Loren Merritt's avatar
Loren Merritt committed
630

631 632
    x264_validate_levels( h );

Loren Merritt's avatar
Loren Merritt committed
633 634 635 636 637
    if( x264_cqm_init( h ) < 0 )
    {
        x264_free( h );
        return NULL;
    }
638 639
    
    h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
640 641

    /* Init frames. */
Loren Merritt's avatar
Loren Merritt committed
642
    h->frames.i_delay = h->param.i_bframe + h->param.i_threads - 1;
643 644
    h->frames.i_max_ref0 = h->param.i_frame_reference;
    h->frames.i_max_ref1 = h->sps->vui.i_num_reorder_frames;
645
    h->frames.i_max_dpb  = h->sps->vui.i_max_dec_frame_buffering;
646
    h->frames.b_have_lowres = !h->param.rc.b_stat_read
647 648
        && ( h->param.rc.i_rc_method == X264_RC_ABR
          || h->param.rc.i_rc_method == X264_RC_CRF
649 650
          || h->param.b_bframe_adaptive
          || h->param.b_pre_scenecut );
651

652
    h->frames.i_last_idr = - h->param.i_keyint_max;
653
    h->frames.i_input    = 0;
654
    h->frames.last_nonb  = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
655 656 657 658

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

Loren Merritt's avatar
Loren Merritt committed
659
    x264_rdo_init( );
Laurent Aimar's avatar
Laurent Aimar committed
660 661 662

    /* init CPU functions */
    x264_predict_16x16_init( h->param.cpu, h->predict_16x16 );
663
    x264_predict_8x8c_init( h->param.cpu, h->predict_8x8c );
Laurent Aimar's avatar
Laurent Aimar committed
664 665 666 667 668
    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 );
669
    x264_zigzag_init( h->param.cpu, &h->zigzagf, h->param.b_interlaced );
670
    x264_mc_init( h->param.cpu, &h->mc );
Laurent Aimar's avatar
Laurent Aimar committed
671
    x264_csp_init( h->param.cpu, h->param.i_csp, &h->csp );
672
    x264_quant_init( h, h->param.cpu, &h->quantf );
Loren Merritt's avatar
Loren Merritt committed
673
    x264_deblock_init( h->param.cpu, &h->loopf );
674
    x264_dct_init_weights();
Laurent Aimar's avatar
Laurent Aimar committed
675

676
    mbcmp_init( h );
Loren Merritt's avatar
Loren Merritt committed
677

678 679 680 681 682
    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 " : "",
683
             param->cpu&X264_CPU_SSSE3 ? "SSSE3 " : "",
684 685 686
             param->cpu&X264_CPU_3DNOW ? "3DNow! " : "",
             param->cpu&X264_CPU_ALTIVEC ? "Altivec " : "" );

Loren Merritt's avatar
Loren Merritt committed
687
    h->out.i_nal = 0;
688 689 690
    h->out.i_bitstream = X264_MAX( 1000000, h->param.i_width * h->param.i_height * 4
        * ( h->param.rc.i_rc_method == X264_RC_ABR ? pow( 0.95, h->param.rc.i_qp_min )
          : pow( 0.95, h->param.rc.i_qp_constant ) * X264_MAX( 1, h->param.rc.f_ip_factor )));
Loren Merritt's avatar
Loren Merritt committed
691

Loren Merritt's avatar
Loren Merritt committed
692
    h->thread[0] = h;
693
    h->i_thread_num = 0;
694
    for( i = 1; i < h->param.i_threads; i++ )
Loren Merritt's avatar
Loren Merritt committed
695 696
        h->thread[i] = x264_malloc( sizeof(x264_t) );

Loren Merritt's avatar
Loren Merritt committed
697 698 699 700
    for( i = 0; i < h->param.i_threads; i++ )
    {
        if( i > 0 )
            *h->thread[i] = *h;
701
        h->thread[i]->fdec = x264_frame_pop_unused( h );
Loren Merritt's avatar
Loren Merritt committed
702 703 704 705 706 707 708 709
        h->thread[i]->out.p_bitstream = x264_malloc( h->out.i_bitstream );
        if( x264_macroblock_cache_init( h->thread[i] ) < 0 )
            return NULL;
    }

    if( x264_ratecontrol_new( h ) < 0 )
        return NULL;

710 711 712 713 714 715 716 717 718 719 720 721 722 723 724
#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
725 726 727
    return h;
}

728 729 730 731 732
/****************************************************************************
 * x264_encoder_reconfig:
 ****************************************************************************/
int x264_encoder_reconfig( x264_t *h, x264_param_t *param )
{
733 734 735
#define COPY(var) h->param.var = param->var
    COPY( i_frame_reference ); // but never uses more refs than initially specified
    COPY( i_bframe_bias );
736 737
    if( h->param.i_scenecut_threshold >= 0 && param->i_scenecut_threshold >= 0 )
        COPY( i_scenecut_threshold ); // can't turn it on or off, only vary the threshold
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
    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
759

760
    mbcmp_init( h );
Loren Merritt's avatar
Loren Merritt committed
761

762 763 764
    return x264_validate_parameters( h );
}

Laurent Aimar's avatar
Laurent Aimar committed
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
/* 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 )
    {
801 802
        /* identify ourself */
        x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
803
        x264_sei_version_write( h, &h->out.bs );
804 805
        x264_nal_end( h );

Laurent Aimar's avatar
Laurent Aimar committed
806 807 808 809 810 811 812 813 814 815 816 817 818
        /* 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];
819
    h->out.i_nal = 0;
Laurent Aimar's avatar
Laurent Aimar committed
820 821 822 823

    return 0;
}

Loren Merritt's avatar
Loren Merritt committed
824
static inline void x264_reference_build_list( x264_t *h, int i_poc )
Laurent Aimar's avatar
Laurent Aimar committed
825 826 827 828 829 830 831
{
    int i;
    int b_ok;

    /* build ref list 0/1 */
    h->i_ref0 = 0;
    h->i_ref1 = 0;
Loren Merritt's avatar
Loren Merritt committed
832
    for( i = 0; h->frames.reference[i]; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
833
    {
Loren Merritt's avatar
Loren Merritt committed
834
        if( h->frames.reference[i]->i_poc < i_poc )
Laurent Aimar's avatar
Laurent Aimar committed
835
        {
Loren Merritt's avatar
Loren Merritt committed
836 837 838 839 840
            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];
Laurent Aimar's avatar
Laurent Aimar committed
841 842
        }
    }
843

Laurent Aimar's avatar
Laurent Aimar committed
844 845 846 847 848 849 850 851
    /* 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
852
                XCHG( x264_frame_t*, h->fref0[i], h->fref0[i+1] );
Laurent Aimar's avatar
Laurent Aimar committed
853 854 855 856 857 858 859 860 861 862 863 864 865
                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
866
                XCHG( x264_frame_t*, h->fref1[i], h->fref1[i+1] );
Laurent Aimar's avatar
Laurent Aimar committed
867 868 869 870 871 872
                b_ok = 0;
                break;
            }
        }
    } while( !b_ok );

873 874 875 876
    /* 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;
Loren Merritt's avatar
Loren Merritt committed
877
    if( h->sh.i_type == SLICE_TYPE_P )
Laurent Aimar's avatar
Laurent Aimar committed
878
    {
879 880 881 882 883 884
        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
885
    }
886 887

    h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
888
    h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
889
    h->i_ref0 = X264_MIN( h->i_ref0, h->param.i_frame_reference ); // if reconfig() has lowered the limit
890
    h->i_ref0 = X264_MIN( h->i_ref0, 16 - h->i_ref1 );
891 892
    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
893 894
}

Loren Merritt's avatar
Loren Merritt committed
895
static void x264_fdec_filter_row( x264_t *h, int mb_y )
Laurent Aimar's avatar
Laurent Aimar committed
896
{
Loren Merritt's avatar
Loren Merritt committed
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922
    /* mb_y is the mb to be encoded next, not the mb to be filtered here */
    int b_hpel = h->fdec->b_kept_as_ref;
    int b_deblock = !h->sh.i_disable_deblocking_filter_idc;
    int b_end = mb_y == h->sps->i_mb_height;
    int min_y = mb_y - (1 << h->sh.b_mbaff);
#ifndef DEBUG_DUMP_FRAME
    b_deblock &= b_hpel;
#endif
    if( mb_y & h->sh.b_mbaff )
        return;
    if( min_y < 0 )
        return;

    if( !b_end )
    {
        int i, j;
        for( j=0; j<=h->sh.b_mbaff; j++ )
            for( i=0; i<3; i++ )
            {
                memcpy( h->mb.intra_border_backup[j][i],
                        h->fdec->plane[i] + ((mb_y*16 >> !!i) + j - 1 - h->sh.b_mbaff) * h->fdec->i_stride[i],
                        h->sps->i_mb_width*16 >> !!i );
            }
    }

    if( b_deblock )
Laurent Aimar's avatar
Laurent Aimar committed
923
    {
Loren Merritt's avatar
Loren Merritt committed
924 925 926 927 928 929 930 931 932 933 934 935 936
        int max_y = b_end ? h->sps->i_mb_height : mb_y;
        int y;
        for( y = min_y; y < max_y; y += (1 << h->sh.b_mbaff) )
            x264_frame_deblock_row( h, y );
    }

    if( b_hpel )
    {
        x264_frame_expand_border( h, h->fdec, min_y, b_end );
        x264_frame_filter( h->param.cpu, h->fdec, h->sh.b_mbaff, min_y, b_end );
        x264_frame_expand_border_filtered( h, h->fdec, min_y, b_end );
    }

937
    if( h->param.i_threads > 1 && h->fdec->b_kept_as_ref )
Loren Merritt's avatar
Loren Merritt committed
938
    {
939
        x264_frame_cond_broadcast( h->fdec, mb_y*16 + (b_end ? 10000 : -(X264_THREAD_HEIGHT << h->sh.b_mbaff)) );
Laurent Aimar's avatar
Laurent Aimar committed
940
    }
941 942 943 944 945 946
}

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

Loren Merritt's avatar
Loren Merritt committed
947 948
    if( h->fdec->i_frame >= 0 )
        h->i_frame++;
Laurent Aimar's avatar
Laurent Aimar committed
949

Loren Merritt's avatar
Loren Merritt committed
950 951 952 953
    if( !h->fdec->b_kept_as_ref )
    {
        if( h->param.i_threads > 1 )
        {
954 955
            x264_frame_push_unused( h, h->fdec );
            h->fdec = x264_frame_pop_unused( h );
Loren Merritt's avatar
Loren Merritt committed
956 957 958
        }
        return;
    }
959

960 961
    /* move lowres copy of the image to the ref frame */
    for( i = 0; i < 4; i++)
962
    {
Loren Merritt's avatar
Loren Merritt committed
963
        XCHG( uint8_t*, h->fdec->lowres[i], h->fenc->lowres[i] );
964 965
        XCHG( uint8_t*, h->fdec->buffer_lowres[i], h->fenc->buffer_lowres[i] );
    }
966 967 968 969 970

    /* 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
971
    /* move frame in the buffer */
972
    x264_frame_push( h->frames.reference, h->fdec );
Loren Merritt's avatar
Loren Merritt committed
973
    if( h->frames.reference[h->frames.i_max_dpb] )
974 975
        x264_frame_push_unused( h, x264_frame_shift( h->frames.reference ) );
    h->fdec = x264_frame_pop_unused( h );
Laurent Aimar's avatar
Laurent Aimar committed
976 977 978 979
}

static inline void x264_reference_reset( x264_t *h )
{
Loren Merritt's avatar
Loren Merritt committed
980
    while( h->frames.reference[0] )
981
        x264_frame_push_unused( h, x264_frame_pop( h->frames.reference ) );
Loren Merritt's avatar
Loren Merritt committed
982 983
    h->fdec->i_poc =
    h->fenc->i_poc = 0;
Laurent Aimar's avatar
Laurent Aimar committed
984 985
}

Loren Merritt's avatar
Loren Merritt committed
986
static inline void x264_slice_init( x264_t *h, int i_nal_type, int i_global_qp )
Laurent Aimar's avatar
Laurent Aimar committed
987 988 989 990
{
    /* ------------------------ Create slice header  ----------------------- */
    if( i_nal_type == NAL_SLICE_IDR )
    {
Loren Merritt's avatar
Loren Merritt committed
991
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, h->i_idr_pic_id, h->i_frame_num, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
992 993

        /* increment id */
994
        h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
Laurent Aimar's avatar
Laurent Aimar committed
995 996 997
    }
    else
    {
Loren Merritt's avatar
Loren Merritt committed
998
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, -1, h->i_frame_num, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
999 1000 1001 1002 1003 1004 1005

        /* 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;
    }

1006 1007
    h->fdec->i_frame_num = h->sh.i_frame_num;

Laurent Aimar's avatar
Laurent Aimar committed
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
    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 ? */
    }

1022
    x264_macroblock_slice_init( h );
Laurent Aimar's avatar
Laurent Aimar committed
1023 1024
}

1025
static void x264_slice_write( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
1026 1027 1028
{
    int i_skip;
    int mb_xy;
1029
    int i;
Laurent Aimar's avatar
Laurent Aimar committed
1030

1031
    /* init stats */
Loren Merritt's avatar
Loren Merritt committed
1032
    memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
Laurent Aimar's avatar
Laurent Aimar committed
1033 1034

    /* Slice */
Loren Merritt's avatar
Loren Merritt committed
1035
    x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1036 1037

    /* Slice header */
Loren Merritt's avatar
Loren Merritt committed
1038
    x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1039 1040
    if( h->param.b_cabac )
    {
1041
        /* alignment needed */
Laurent Aimar's avatar
Laurent Aimar committed
1042 1043 1044
        bs_align_1( &h->out.bs );

        /* init cabac */
1045
        x264_cabac_context_init( &h->cabac, h->sh.i_type, h->sh.i_qp, h->sh.i_cabac_init_idc );
1046
        x264_cabac_encode_init ( &h->cabac, h->out.bs.p, h->out.bs.p_end );
Laurent Aimar's avatar
Laurent Aimar committed
1047
    }
1048
    h->mb.i_last_qp = h->sh.i_qp;
Laurent Aimar's avatar
Laurent Aimar committed
1049 1050
    h->mb.i_last_dqp = 0;

1051
    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
1052 1053 1054
    {
        const int i_mb_y = mb_xy / h->sps->i_mb_width;
        const int i_mb_x = mb_xy % h->sps->i_mb_width;
1055 1056
        int mb_spos = bs_pos(&h->out.bs);

Loren Merritt's avatar
Loren Merritt committed
1057 1058 1059
        if( i_mb_x == 0 )
            x264_fdec_filter_row( h, i_mb_y );

Laurent Aimar's avatar
Laurent Aimar committed
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
        /* 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
1071
        /* encode this macroblock -> be careful it can change the mb type to P_SKIP if needed */
Laurent Aimar's avatar
Laurent Aimar committed
1072 1073 1074 1075 1076
        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
1077
        if( h->param.b_cabac )
Laurent Aimar's avatar
Laurent Aimar committed
1078
        {
1079
            if( mb_xy > h->sh.i_first_mb && !(h->sh.b_mbaff && (i_mb_y&1)) )
Loren Merritt's avatar
Loren Merritt committed
1080
                x264_cabac_encode_terminal( &h->cabac, 0 );
Laurent Aimar's avatar
Laurent Aimar committed
1081

Loren Merritt's avatar
Loren Merritt committed
1082
            if( IS_SKIP( h->mb.i_type ) )
Laurent Aimar's avatar
Laurent Aimar committed
1083 1084 1085 1086 1087
                x264_cabac_mb_skip( h, 1 );
            else
            {
                if( h->sh.i_type != SLICE_TYPE_I )
                    x264_cabac_mb_skip( h, 0 );
1088
                x264_macroblock_write_cabac( h, &h->cabac );
Laurent Aimar's avatar
Laurent Aimar committed
1089
            }
Loren Merritt's avatar
Loren Merritt committed
1090 1091 1092 1093 1094
        }
        else
        {
            if( IS_SKIP( h->mb.i_type ) )
                i_skip++;
Laurent Aimar's avatar
Laurent Aimar committed
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
            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