encoder.c 51.3 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 28 29
/*****************************************************************************
 * 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 <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <math.h>

30 31
#include "common/common.h"
#include "common/cpu.h"
Laurent Aimar's avatar
Laurent Aimar committed
32 33 34 35 36 37 38

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

//#define DEBUG_MB_TYPE
39
//#define DEBUG_DUMP_FRAME
40
//#define DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
41

42
#ifdef DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
43 44 45 46 47 48 49 50 51 52 53 54
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;\
    }
55 56 57 58
#else
#define TIMER_START( d )
#define TIMER_STOP( d )
#endif
Laurent Aimar's avatar
Laurent Aimar committed
59

60
#define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
Laurent Aimar's avatar
Laurent Aimar committed
61 62 63 64 65 66

/****************************************************************************
 *
 ******************************* x264 libs **********************************
 *
 ****************************************************************************/
67
static int64_t x264_sqe( x264_t *h, uint8_t *pix1, int i_pix_stride, uint8_t *pix2, int i_pix2_stride, int i_width, int i_height )
Laurent Aimar's avatar
Laurent Aimar committed
68 69 70 71
{
    int64_t i_sqe = 0;
    int x, y;

72 73 74 75
    for( y = 0; y < i_height; y += 16 )
        for( x = 0; x < i_width; x += 16 )
            i_sqe += h->pixf.ssd[PIXEL_16x16]( pix1+y*i_pix_stride+x, i_pix_stride,
                                               pix2+y*i_pix2_stride+x, i_pix2_stride );
Laurent Aimar's avatar
Laurent Aimar committed
76

77
    x264_cpu_restore( h->param.cpu );
Laurent Aimar's avatar
Laurent Aimar committed
78

79 80
    return i_sqe;
}
Laurent Aimar's avatar
Laurent Aimar committed
81

82 83 84
static float x264_mse( int64_t i_sqe, int64_t i_size )
{
    return (double)i_sqe / ((double)65025.0 * (double)i_size);
Laurent Aimar's avatar
Laurent Aimar committed
85 86
}

87 88 89 90 91 92 93 94 95 96
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
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
static void x264_frame_dump( x264_t *h, x264_frame_t *fr, char *name )
{
    FILE * f = fopen( name, "a" );
    int i, y;

    fseek( f, 0, SEEK_END );

    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 */
117
static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
Laurent Aimar's avatar
Laurent Aimar committed
118
                                    x264_sps_t *sps, x264_pps_t *pps,
119
                                    int i_type, int i_idr_pic_id, int i_frame, int i_qp )
Laurent Aimar's avatar
Laurent Aimar committed
120
{
121
    x264_param_t *param = &h->param;
122
    int i;
123

Laurent Aimar's avatar
Laurent Aimar committed
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
    /* First we fill all field */
    sh->sps = sps;
    sh->pps = pps;

    sh->i_type      = i_type;
    sh->i_first_mb  = 0;
    sh->i_pps_id    = pps->i_id;

    sh->i_frame_num = i_frame;

    sh->b_field_pic = 0;    /* Not field support for now */
    sh->b_bottom_field = 1; /* not yet used */

    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;

147
    sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
Laurent Aimar's avatar
Laurent Aimar committed
148 149 150 151 152

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

153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
    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
172 173
    sh->i_cabac_init_idc = param->i_cabac_init_idc;

174
    sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
Laurent Aimar's avatar
Laurent Aimar committed
175 176 177
    sh->b_sp_for_swidth = 0;
    sh->i_qs_delta = 0;

178 179 180 181
    /* If effective qp <= 15, deblocking would have no effect anyway */
    if( param->b_deblocking_filter
        && ( h->mb.b_variable_qp
        || 15 < i_qp + X264_MAX(param->i_deblocking_filter_alphac0, param->i_deblocking_filter_beta) ) )
Laurent Aimar's avatar
Laurent Aimar committed
182 183 184 185 186 187 188 189 190 191 192 193 194
    {
        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 )
{
195 196
    int i;

Laurent Aimar's avatar
Laurent Aimar committed
197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248
    bs_write_ue( s, sh->i_first_mb );
    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 );

    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 )
    {
249 250
        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
251
        {
252 253 254 255 256 257 258
            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
259 260 261 262
        }
    }
    if( sh->i_type == SLICE_TYPE_B )
    {
263 264
        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
265
        {
266 267 268 269 270 271
            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
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
        }
    }

    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 */
            /* FIXME */
        }
    }

    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 0
    if( sh->i_type == SLICE_TYPE_SP || sh->i_type == SLICE_TYPE_SI )
    {
        if( sh->i_type == SLICE_TYPE_SP )
        {
            bs_write1( s, sh->b_sp_for_swidth );
        }
        bs_write_se( s, sh->i_qs_delta );
    }
#endif

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

/****************************************************************************
 * x264_encoder_open:
 ****************************************************************************/
x264_t *x264_encoder_open   ( x264_param_t *param )
{
    x264_t *h = x264_malloc( sizeof( x264_t ) );
Loren Merritt's avatar
Loren Merritt committed
336
    int i, i_slice;
Laurent Aimar's avatar
Laurent Aimar committed
337

338
    /* Create a copy of param */
339
    memcpy( &h->param, param, sizeof( x264_param_t ) );
340 341 342 343 344 345
    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 );
346

Laurent Aimar's avatar
Laurent Aimar committed
347 348 349
    /* Check parameters validity */
    if( param->i_width <= 0  || param->i_height <= 0 )
    {
350 351
        x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
                  param->i_width, param->i_height );
Laurent Aimar's avatar
Laurent Aimar committed
352 353 354 355 356 357
        free( h );
        return NULL;
    }

    if( param->i_width % 16 != 0 || param->i_height % 16 != 0 )
    {
358
        x264_log( h, X264_LOG_ERROR, "width %% 16 != 0 or height %% 16 != 0 (%dx%d)\n",
Laurent Aimar's avatar
Laurent Aimar committed
359 360 361 362 363 364
                 param->i_width, param->i_height );
        free( h );
        return NULL;
    }
    if( param->i_csp != X264_CSP_I420 )
    {
365
        x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
Laurent Aimar's avatar
Laurent Aimar committed
366 367 368 369 370
        free( h );
        return NULL;
    }

    /* Fix parameters values */
Loren Merritt's avatar
Loren Merritt committed
371
    h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
372 373 374
    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 );
375

Loren Merritt's avatar
Loren Merritt committed
376
    h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
377
    h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
378
    h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
379
    h->frames.i_delay = h->param.i_bframe;
380 381 382 383
    h->frames.i_max_ref0 = h->param.i_frame_reference;
    h->frames.i_max_ref1 = h->param.b_bframe_pyramid ? 2
                            : h->param.i_bframe ? 1 : 0;
    h->frames.i_max_dpb = h->frames.i_max_ref0 + h->frames.i_max_ref1 + 1;
Laurent Aimar's avatar
Laurent Aimar committed
384 385 386 387 388 389

    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 );

    h->param.i_cabac_init_idc = x264_clip3( h->param.i_cabac_init_idc, -1, 2 );

390 391
    h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 5 );
    if( h->param.analyse.inter & X264_ANALYSE_PSUB8x8 )
392
        h->param.analyse.inter |= X264_ANALYSE_PSUB16x16;
393
    h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
394
    h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 2048);
395

Loren Merritt's avatar
Loren Merritt committed
396 397 398 399 400
    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;

401 402 403
    /* VUI */
    if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
    {
404 405 406
        int i_w = param->vui.i_sar_width;
        int i_h = param->vui.i_sar_height;
        int a = i_w, b = i_h;
407 408 409 410 411 412 413 414 415

        while( b != 0 )
        {
            int t = a;

            a = b;
            b = t % b;
        }

416 417 418
        i_w /= a;
        i_h /= a;
        while( i_w > 65535 || i_h > 65535 )
419
        {
420 421
            i_w /= 2;
            i_h /= 2;
422 423 424 425
        }

        h->param.vui.i_sar_width = 0;
        h->param.vui.i_sar_height = 0;
426
        if( i_w == 0 || i_h == 0 )
427 428 429
        {
            x264_log( h, X264_LOG_ERROR, "cannot create valid sample aspect ratio\n" );
        }
430
        else if( i_w == i_h )
431 432 433 434 435
        {
            x264_log( h, X264_LOG_INFO, "no need for a SAR\n" );
        }
        else
        {
436 437 438
            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;
439 440 441 442
        }
    }


Laurent Aimar's avatar
Laurent Aimar committed
443 444 445 446 447 448 449 450 451 452 453 454 455 456
    /* Init x264_t */
    h->out.i_nal = 0;
    h->out.i_bitstream = 1000000; /* FIXME estimate max size (idth/height) */
    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];
    x264_sps_init( h->sps, 0, &h->param );

    h->pps = &h->pps_array[0];
    x264_pps_init( h->pps, 0, &h->param, h->sps);
457 458
    
    h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
459 460

    /* Init frames. */
461
    for( i = 0; i < X264_BFRAME_MAX + 3; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
462 463 464 465 466
    {
        h->frames.current[i] = NULL;
        h->frames.next[i]    = NULL;
        h->frames.unused[i]  = NULL;
    }
467
    for( i = 0; i < 1 + h->frames.i_delay; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
468 469 470
    {
        h->frames.unused[i] =  x264_frame_new( h );
    }
471
    for( i = 0; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
472 473 474
    {
        h->frames.reference[i] = x264_frame_new( h );
    }
475
    h->frames.reference[h->frames.i_max_dpb] = NULL;
476
    h->frames.i_last_idr = - h->param.i_keyint_max;
477
    h->frames.i_input    = 0;
478
    h->frames.last_nonb  = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

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

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

    /* init mb cache */
    x264_macroblock_cache_init( h );

    /* init cabac adaptive model */
    x264_cabac_model_init( &h->cabac );

    /* init CPU functions */
    x264_predict_16x16_init( h->param.cpu, h->predict_16x16 );
    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 );
498
    x264_mc_init( h->param.cpu, &h->mc );
Laurent Aimar's avatar
Laurent Aimar committed
499 500 501
    x264_csp_init( h->param.cpu, h->param.i_csp, &h->csp );

    /* rate control */
502 503
    if( x264_ratecontrol_new( h ) < 0 )
        return NULL;
504 505 506

    h->i_last_intra_size = 0;
    h->i_last_inter_size = 0;
Laurent Aimar's avatar
Laurent Aimar committed
507 508

    /* stat */
Loren Merritt's avatar
Loren Merritt committed
509
    for( i_slice = 0; i_slice < 5; i_slice++ )
Laurent Aimar's avatar
Laurent Aimar committed
510
    {
Loren Merritt's avatar
Loren Merritt committed
511 512 513 514 515 516 517 518 519 520
        h->stat.i_slice_count[i_slice] = 0;
        h->stat.i_slice_size[i_slice] = 0;
        h->stat.i_slice_qp[i_slice] = 0;

        h->stat.i_sqe_global[i_slice] = 0;
        h->stat.f_psnr_average[i_slice] = 0.0;
        h->stat.f_psnr_mean_y[i_slice] = h->stat.f_psnr_mean_u[i_slice] = h->stat.f_psnr_mean_v[i_slice] = 0.0;
        
        for( i = 0; i < 18; i++ )
            h->stat.i_mb_count[i_slice][i] = 0;
Laurent Aimar's avatar
Laurent Aimar committed
521
    }
522 523 524 525 526 527 528 529 530

    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 " : "" );

Laurent Aimar's avatar
Laurent Aimar committed
531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569
    return h;
}

/* 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 )
    {
570 571 572 573 574
        /* identify ourself */
        x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
        x264_sei_version_write( &h->out.bs );
        x264_nal_end( h );

Laurent Aimar's avatar
Laurent Aimar committed
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595
        /* 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;
596
    while( list[i] ) i++;
Laurent Aimar's avatar
Laurent Aimar committed
597 598 599
    list[i] = frame;
}

600 601 602 603 604 605 606 607 608
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
609 610 611 612
static x264_frame_t *x264_frame_get( x264_frame_t *list[X264_BFRAME_MAX+1] )
{
    x264_frame_t *frame = list[0];
    int i;
613
    for( i = 0; list[i]; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
614 615 616 617
        list[i] = list[i+1];
    return frame;
}

618
static void x264_frame_sort( x264_frame_t *list[X264_BFRAME_MAX+1], int b_dts )
619 620 621 622
{
    int i, b_ok;
    do {
        b_ok = 1;
623
        for( i = 0; list[i+1]; i++ )
624
        {
625 626 627 628 629
            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 )
630 631 632 633 634 635 636 637 638
            {
                x264_frame_t *tmp = list[i+1];
                list[i+1] = list[i];
                list[i] = tmp;
                b_ok = 0;
            }
        }
    } while( !b_ok );
}
639 640
#define x264_frame_sort_dts(list) x264_frame_sort(list, 1)
#define x264_frame_sort_pts(list) x264_frame_sort(list, 0)
641

642
static inline void x264_reference_build_list( x264_t *h, int i_poc, int i_slice_type )
Laurent Aimar's avatar
Laurent Aimar committed
643 644 645 646 647 648 649
{
    int i;
    int b_ok;

    /* build ref list 0/1 */
    h->i_ref0 = 0;
    h->i_ref1 = 0;
650
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
651 652 653 654 655 656 657 658 659 660 661 662 663
    {
        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];
            }
        }
    }
664

Laurent Aimar's avatar
Laurent Aimar committed
665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
    /* 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 )
            {
                x264_frame_t *tmp = h->fref0[i+1];

                h->fref0[i+1] = h->fref0[i];
                h->fref0[i] = tmp;
                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 )
            {
                x264_frame_t *tmp = h->fref1[i+1];

                h->fref1[i+1] = h->fref1[i];
                h->fref1[i] = tmp;
                b_ok = 0;
                break;
            }
        }
    } while( !b_ok );

700 701 702 703 704
    /* 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
705
    {
706 707 708 709 710 711
        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
712
    }
713 714 715

    h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
    h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
Laurent Aimar's avatar
Laurent Aimar committed
716 717 718 719 720 721 722
}

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

    /* apply deblocking filter to the current decoded picture */
723
    if( !h->sh.i_disable_deblocking_filter_idc )
Laurent Aimar's avatar
Laurent Aimar committed
724 725 726 727 728 729 730 731
    {
        TIMER_START( i_mtime_filter );
        x264_frame_deblocking_filter( h, h->sh.i_type );
        TIMER_STOP( i_mtime_filter );
    }
    /* expand border */
    x264_frame_expand_border( h->fdec );

732 733 734 735 736 737
    /* create filtered images */
    x264_frame_filter( h->param.cpu, h->fdec );

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

738 739 740 741 742 743 744 745 746 747 748 749
    /* move lowres copy of the image to the ref frame */
    for( i = 0; i < 4; i++)
    {
        uint8_t *tmp = h->fdec->lowres[i];
        h->fdec->lowres[i] = h->fenc->lowres[i];
        h->fenc->lowres[i] = tmp;
    }

    /* 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
750
    /* move frame in the buffer */
751 752 753
    /* FIXME: override to forget earliest pts, not earliest dts */
    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
754 755 756 757 758 759 760 761 762 763 764
    {
        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 */
765
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
766 767 768 769 770 771 772 773 774 775 776
    {
        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 )
    {
777
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, i_slice_type, h->i_idr_pic_id, h->i_frame_num - 1, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
778 779

        /* increment id */
780
        h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
Laurent Aimar's avatar
Laurent Aimar committed
781 782 783
    }
    else
    {
784
        x264_slice_header_init( h, &h->sh, h->sps, h->pps, i_slice_type, -1, h->i_frame_num - 1, i_global_qp );
Laurent Aimar's avatar
Laurent Aimar committed
785 786 787 788 789 790 791

        /* 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;
    }

792 793
    h->fdec->i_frame_num = h->sh.i_frame_num;

Laurent Aimar's avatar
Laurent Aimar committed
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
    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 ? */
    }

    /* get adapative cabac model if needed */
    if( h->param.b_cabac )
    {
        if( h->param.i_cabac_init_idc == -1 )
        {
            h->sh.i_cabac_init_idc = x264_cabac_model_get( &h->cabac, i_slice_type );
        }
    }
816 817

    x264_macroblock_slice_init( h );
Laurent Aimar's avatar
Laurent Aimar committed
818 819
}

820
static inline void x264_slice_write( x264_t *h, int i_nal_type, int i_nal_ref_idc )
Laurent Aimar's avatar
Laurent Aimar committed
821 822 823 824 825 826
{
    int i_skip;
    int mb_xy;
    int i;

    /* Init stats */
827 828 829
    h->stat.frame.i_hdr_bits  =
    h->stat.frame.i_itex_bits =
    h->stat.frame.i_ptex_bits =
830 831 832
    h->stat.frame.i_misc_bits =
    h->stat.frame.i_intra_cost =
    h->stat.frame.i_inter_cost = 0;
Loren Merritt's avatar
Loren Merritt committed
833
    for( i = 0; i < 18; i++ )
834
        h->stat.frame.i_mb_count[i] = 0;
Laurent Aimar's avatar
Laurent Aimar committed
835 836 837 838 839 840 841 842

    /* Slice */
    x264_nal_start( h, i_nal_type, i_nal_ref_idc );

    /* Slice header */
    x264_slice_header_write( &h->out.bs, &h->sh, i_nal_ref_idc );
    if( h->param.b_cabac )
    {
843
        /* alignment needed */
Laurent Aimar's avatar
Laurent Aimar committed
844 845 846 847 848 849 850 851 852 853 854 855 856 857
        bs_align_1( &h->out.bs );

        /* init cabac */
        x264_cabac_context_init( &h->cabac, h->sh.i_type, h->sh.pps->i_pic_init_qp + h->sh.i_qp_delta, h->sh.i_cabac_init_idc );
        x264_cabac_encode_init ( &h->cabac, &h->out.bs );
    }
    h->mb.i_last_qp = h->pps->i_pic_init_qp + h->sh.i_qp_delta;
    h->mb.i_last_dqp = 0;

    for( mb_xy = 0, i_skip = 0; mb_xy < h->sps->i_mb_width * h->sps->i_mb_height; mb_xy++ )
    {
        const int i_mb_y = mb_xy / h->sps->i_mb_width;
        const int i_mb_x = mb_xy % h->sps->i_mb_width;

858 859
        int mb_spos = bs_pos(&h->out.bs);

Laurent Aimar's avatar
Laurent Aimar committed
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923
        /* 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 );

        /* encode this macrobock -> be carefull it can change the mb type to P_SKIP if needed */
        TIMER_START( i_mtime_encode );
        x264_macroblock_encode( h );
        TIMER_STOP( i_mtime_encode );

        TIMER_START( i_mtime_write );
        if( IS_SKIP( h->mb.i_type ) )
        {
            if( h->param.b_cabac )
            {
                if( mb_xy > 0 )
                {
                    /* not end_of_slice_flag */
                    x264_cabac_encode_terminal( &h->cabac, 0 );
                }

                x264_cabac_mb_skip( h, 1 );
            }
            else
            {
                i_skip++;
            }
        }
        else
        {
            if( h->param.b_cabac )
            {
                if( mb_xy > 0 )
                {
                    /* not end_of_slice_flag */
                    x264_cabac_encode_terminal( &h->cabac, 0 );
                }
                if( h->sh.i_type != SLICE_TYPE_I )
                {
                    x264_cabac_mb_skip( h, 0 );
                }
                x264_macroblock_write_cabac( h, &h->out.bs );
            }
            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 );

        /* save cache */
        x264_macroblock_cache_save( h );

924
        h->stat.frame.i_mb_count[h->mb.i_type]++;
925

926 927
        if( h->mb.b_variable_qp )
            x264_ratecontrol_mb(h, bs_pos(&h->out.bs) - mb_spos);
Laurent Aimar's avatar
Laurent Aimar committed
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959
    }

    if( h->param.b_cabac )
    {
        /* end of slice */
        x264_cabac_encode_terminal( &h->cabac, 1 );
    }
    else if( i_skip > 0 )
    {
        bs_write_ue( &h->out.bs, i_skip );  /* last skip run */
    }

    if( h->param.b_cabac )
    {
        int i_cabac_word;
        x264_cabac_encode_flush( &h->cabac );
        /* TODO cabac stuffing things (p209) */
        i_cabac_word = (((3 * h->cabac.i_sym_cnt - 3 * 96 * h->sps->i_mb_width * h->sps->i_mb_height)/32) - bs_pos( &h->out.bs)/8)/3;

        while( i_cabac_word > 0 )
        {
            bs_write( &h->out.bs, 16, 0x0000 );
            i_cabac_word--;
        }
    }
    else
    {
        /* rbsp_slice_trailing_bits */
        bs_rbsp_trailing( &h->out.bs );
    }

    x264_nal_end( h );
960 961 962

    /* Compute misc bits */
    h->stat.frame.i_misc_bits = bs_pos( &h->out.bs )
963
                              + NALU_OVERHEAD * 8
964 965 966
                              - h->stat.frame.i_itex_bits
                              - h->stat.frame.i_ptex_bits
                              - h->stat.frame.i_hdr_bits;
Laurent Aimar's avatar
Laurent Aimar committed
967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983
}

/****************************************************************************
 * x264_encoder_encode:
 *  XXX: i_poc   : is the poc of the current given picture
 *       i_frame : is the number of the frame being coded
 *  ex:  type frame poc
 *       I      0   2*0
 *       P      1   2*3
 *       B      2   2*1
 *       B      3   2*2
 *       P      4   2*6
 *       B      5   2*4
 *       B      6   2*5
 ****************************************************************************/
int     x264_encoder_encode( x264_t *h,
                             x264_nal_t **pp_nal, int *pi_nal,
984 985
                             x264_picture_t *pic_in,
                             x264_picture_t *pic_out )
Laurent Aimar's avatar
Laurent Aimar committed
986
{
987
    x264_frame_t   *frame_psnr = h->fdec; /* just to keep the current decoded frame for psnr calculation */
Laurent Aimar's avatar
Laurent Aimar committed
988 989 990 991 992 993 994 995
    int     i_nal_type;
    int     i_nal_ref_idc;
    int     i_slice_type;

    int i;

    int   i_global_qp;

Loren Merritt's avatar
Loren Merritt committed
996 997
    char psz_message[80];

Laurent Aimar's avatar
Laurent Aimar committed
998 999 1000 1001 1002 1003 1004
    /* no data out */
    *pi_nal = 0;
    *pp_nal = NULL;


    /* ------------------- Setup new frame from picture -------------------- */
    TIMER_START( i_mtime_encode_frame );
1005
    if( pic_in != NULL )
Laurent Aimar's avatar
Laurent Aimar committed
1006
    {
1007
        /* 1: Copy the picture to a frame and move it to a buffer */
Laurent Aimar's avatar
Laurent Aimar committed
1008 1009
        x264_frame_t *fenc = x264_frame_get( h->frames.unused );

1010
        x264_frame_copy_picture( h, fenc, pic_in );
Laurent Aimar's avatar
Laurent Aimar committed
1011

1012 1013
        fenc->i_frame = h->frames.i_input++;

1014 1015
        x264_frame_put( h->frames.next, fenc );

1016 1017 1018
        x264_frame_init_lowres( h->param.cpu, fenc );

        if( h->frames.i_input <= h->frames.i_delay )
1019
        {
1020 1021
            /* Nothing yet to encode */
            /* waiting for filling bframe buffer */
1022
            pic_out->i_type = X264_TYPE_AUTO;
1023
            return 0;
1024
        }
1025
    }
Laurent Aimar's avatar
Laurent Aimar committed
1026

1027 1028
    if( h->frames.current[0] == NULL )
    {
1029
        int bframes = 0;
1030 1031 1032
        /* 2: Select frame types */
        if( h->frames.next[0] == NULL )
            return 0;
Laurent Aimar's avatar
Laurent Aimar committed
1033

1034
        x264_slicetype_decide( h );
1035 1036

        /* 3: move some B-frames and 1 non-B to encode queue */
1037
        while( IS_X264_TYPE_B( h->frames.next[bframes]->i_type ) )
1038
            bframes++;
1039 1040 1041 1042 1043 1044 1045 1046 1047
        x264_frame_put( h->frames.current, x264_frame_get( &h->frames.next[bframes] ) );
        /* FIXME: when max B-frames > 3, BREF may no longer be centered after GOP closing */
        if( h->param.b_bframe_pyramid && bframes > 1 )
        {
            x264_frame_t *mid = x264_frame_get( &h->frames.next[bframes/2] );
            mid->i_type = X264_TYPE_BREF;
            x264_frame_put( h->frames.current, mid );
            bframes--;
        }
1048 1049
        while( bframes-- )
            x264_frame_put( h->frames.current, x264_frame_get( h->frames.next ) );
Laurent Aimar's avatar
Laurent Aimar committed
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
    }
    TIMER_STOP( i_mtime_encode_frame );

    /* ------------------- Get frame to be encoded ------------------------- */
    /* 4: get picture to encode */
    h->fenc = x264_frame_get( h->frames.current );
    if( h->fenc == NULL )
    {
        /* Nothing yet to encode (ex: waiting for I/P with B frames) */
        /* waiting for filling bframe buffer */
1060
        pic_out->i_type = X264_TYPE_AUTO;
Laurent Aimar's avatar
Laurent Aimar committed
1061 1062 1063
        return 0;
    }

1064 1065 1066 1067
do_encode:

    if( h->fenc->i_type == X264_TYPE_IDR )
    {
1068
        h->frames.i_last_idr = h->fenc->i_frame;
1069 1070
    }

Laurent Aimar's avatar
Laurent Aimar committed
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
    /* ------------------- Setup frame context ----------------------------- */
    /* 5: Init data dependant of frame type */
    TIMER_START( i_mtime_encode_frame );
    if( h->fenc->i_type == X264_TYPE_IDR )
    {
        /* reset ref pictures */
        x264_reference_reset( h );

        i_nal_type    = NAL_SLICE_IDR;
        i_nal_ref_idc = NAL_PRIORITY_HIGHEST;
        i_slice_type = SLICE_TYPE_I;
    }
    else if( h->fenc->i_type == X264_TYPE_I )
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
        i_slice_type = SLICE_TYPE_I;
    }
    else if( h->fenc->i_type == X264_TYPE_P )
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_HIGH; /* Not completely true but for now it is (as all I/P are kept as ref)*/
        i_slice_type = SLICE_TYPE_P;
    }
1095 1096 1097 1098 1099 1100
    else if( h->fenc->i_type == X264_TYPE_BREF )
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_HIGH; /* maybe add MMCO to forget it? -> low */
        i_slice_type = SLICE_TYPE_B;
    }
Laurent Aimar's avatar
Laurent Aimar committed
1101 1102 1103 1104 1105 1106 1107
    else    /* B frame */
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_DISPOSABLE;
        i_slice_type = SLICE_TYPE_B;
    }

1108 1109
    h->fdec->i_poc =
    h->fenc->i_poc = 2 * (h->fenc->i_frame - h->frames.i_last_idr);
Laurent Aimar's avatar
Laurent Aimar committed
1110
    h->fdec->i_type = h->fenc->i_type;
Loren Merritt's avatar
Loren Merritt committed
1111
    h->fdec->i_frame = h->fenc->i_frame;
1112 1113
    h->fenc->b_kept_as_ref =
    h->fdec->b_kept_as_ref = i_nal_ref_idc != NAL_PRIORITY_DISPOSABLE;
Laurent Aimar's avatar
Laurent Aimar committed
1114 1115 1116 1117 1118



    /* ------------------- Init                ----------------------------- */
    /* Init the rate control */
Måns Rullgård's avatar
Måns Rullgård committed
1119
    x264_ratecontrol_start( h, i_slice_type, h->fenc->i_qpplus1 );
1120
    i_global_qp = x264_ratecontrol_qp( h );
1121

1122 1123
    pic_out->i_qpplus1 =
    h->fdec->i_qpplus1 = i_global_qp + 1;
Laurent Aimar's avatar
Laurent Aimar committed
1124 1125

    /* build ref list 0/1 */
1126
    x264_reference_build_list( h, h->fdec->i_poc, i_slice_type );
Laurent Aimar's avatar
Laurent Aimar committed
1127

1128 1129 1130
    if( i_slice_type == SLICE_TYPE_B )
        x264_macroblock_bipred_init( h );

Laurent Aimar's avatar
Laurent Aimar committed
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
    /* increase frame num but only once for B frame */
    if( i_slice_type != SLICE_TYPE_B || h->sh.i_type != SLICE_TYPE_B )
    {
        h->i_frame_num++;
    }

    /* ------------------------ Create slice header  ----------------------- */
    x264_slice_init( h, i_nal_type, i_slice_type, i_global_qp );

    /* ---------------------- Write the bitstream -------------------------- */
    /* Init bitstream context */
    h->out.i_nal = 0;
    bs_init( &h->out.bs, h->out.p_bitstream, h->out.i_bitstream );

    /* Write SPS and PPS */
    if( i_nal_type == NAL_SLICE_IDR )
    {
1148 1149 1150 1151 1152 1153 1154 1155
        if( h->fenc->i_frame == 0 )
        {
            /* identify ourself */
            x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
            x264_sei_version_write( &h->out.bs );
            x264_nal_end( h );
        }

Laurent Aimar's avatar
Laurent Aimar committed
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
        /* 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 );
    }

    /* Write the slice */
1168
    x264_slice_write( h, i_nal_type, i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
1169

1170 1171 1172
    /* restore CPU state (before using float again) */
    x264_cpu_restore( h->param.cpu );

1173
    if( i_slice_type == SLICE_TYPE_P && !h->param.rc.b_stat_read 
1174
        && h->param.i_scenecut_threshold >= 0 )
1175
    {
1176
        int i_mb_i = h->stat.frame.i_mb_count[I_4x4] + h->stat.frame.i_mb_count[I_16x16];
1177 1178
        int i_mb_p = h->stat.frame.i_mb_count[P_L0] + h->stat.frame.i_mb_count[P_8x8];
        int i_mb_s = h->stat.frame.i_mb_count[P_SKIP];
1179
        int i_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
1180 1181 1182
        int64_t i_inter_cost = h->stat.frame.i_inter_cost;
        int64_t i_intra_cost = h->stat.frame.i_intra_cost;

1183 1184
        float f_bias;
        int i_gop_size = h->fenc->i_frame - h->frames.i_last_idr;
1185 1186 1187 1188 1189 1190 1191
        float f_thresh_max = h->param.i_scenecut_threshold / 100.0;
        /* ratio of 10 pulled out of thin air */
        float f_thresh_min = f_thresh_max * h->param.i_keyint_min
                             / ( h->param.i_keyint_max * 4 );
        if( h->param.i_keyint_min == h->param.i_keyint_max )
             f_thresh_min= f_thresh_max;

1192 1193 1194 1195 1196
        /* macroblock_analyse() doesn't further analyse skipped mbs,
         * so we have to guess their cost */
        if( i_mb_s < i_mb )
            i_intra_cost = i_intra_cost * i_mb / (i_mb - i_mb_s);

1197
        if( i_gop_size < h->param.i_keyint_min / 4 )
1198
            f_bias = f_thresh_min / 4;
1199 1200
        else if( i_gop_size <= h->param.i_keyint_min )
            f_bias = f_thresh_min * i_gop_size / h->param.i_keyint_min;
1201
        else
1202 1203 1204
        {
            f_bias = f_thresh_min
                     + ( f_thresh_max - f_thresh_min )
1205
                       * ( i_gop_size - h->param.i_keyint_min )
1206 1207 1208
                       / ( h->param.i_keyint_max - h->param.i_keyint_min );
        }
        f_bias = X264_MIN( f_bias, 1.0 );
1209

1210
        /* Bad P will be reencoded as I */
1211
        if( i_mb_s < i_mb &&
1212 1213
            i_inter_cost >= (1.0 - f_bias) * i_intra_cost )
            /* i_mb_i >= (1.0 - f_bias) * i_mb ) */
1214
            /*
1215 1216 1217 1218
            h->out.nal[h->out.i_nal-1].i_payload > h->i_last_intra_size +
            h->i_last_intra_size * (3+h->i_last_intra_qp - i_global_qp) / 16 &&
            i_mb_count[I_4x4] + i_mb_count[I_16x16] > i_mb_count[P_SKIP] + i_mb_count[P_L0]/2 &&
            h->out.nal[h->out.i_nal-1].i_payload > 2 * h->i_last_inter_size &&
1219
            h->frames.i_last_i > 4)*/
1220
        {
1221
            int b;
1222

1223
            x264_log( h, X264_LOG_DEBUG, "scene cut at %d size=%d Icost:%.0f Pcost:%.0f ratio:%.3f bias=%.3f lastIDR:%d (I:%d P:%d Skip:%d)\n",
1224
                      h->fenc->i_frame,
1225
                      h->out.nal[h->out.i_nal-1].i_payload,
1226 1227
                      (double)i_intra_cost, (double)i_inter_cost,
                      (double)i_inter_cost / i_intra_cost,
1228
                      f_bias, i_gop_size,
1229
                      i_mb_i, i_mb_p, i_mb_s );
1230 1231 1232 1233

            /* Restore frame num */
            h->i_frame_num--;

1234 1235
            for( b = 0; h->frames.current[b] && IS_X264_TYPE_B( h->frames.current[b]->i_type ); b++ );
            if( b > 0 )
1236 1237 1238 1239 1240 1241 1242 1243 1244
            {
                /* If using B-frames, force GOP to be closed.
                 * Even if this frame is going to be I and not IDR, forcing a
                 * P-frame before the scenecut will probably help compression.