encoder.c 55.4 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
/*****************************************************************************
 * 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>

Loren Merritt's avatar
Loren Merritt committed
29
30
31
32
#if HAVE_PTHREAD
#include <pthread.h>
#endif

33
34
#include "common/common.h"
#include "common/cpu.h"
Laurent Aimar's avatar
Laurent Aimar committed
35
36
37
38
39
40

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

Loren Merritt's avatar
Loren Merritt committed
41
42
43
44
#if VISUALIZE
#include "common/visualize.h"
#endif

Laurent Aimar's avatar
Laurent Aimar committed
45
//#define DEBUG_MB_TYPE
46
//#define DEBUG_DUMP_FRAME
47
//#define DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
48

49
#ifdef DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
50
51
52
53
54
55
56
57
58
59
60
61
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;\
    }
62
63
64
65
#else
#define TIMER_START( d )
#define TIMER_STOP( d )
#endif
Laurent Aimar's avatar
Laurent Aimar committed
66

67
#define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
Laurent Aimar's avatar
Laurent Aimar committed
68
69
70
71
72
73

/****************************************************************************
 *
 ******************************* x264 libs **********************************
 *
 ****************************************************************************/
74
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
75
76
77
78
{
    int64_t i_sqe = 0;
    int x, y;

79
80
81
82
83
84
85
86
87
88
89
90
91
#define SSD(size) i_sqe += h->pixf.ssd[size]( pix1+y*i_pix_stride+x, i_pix_stride, \
                                              pix2+y*i_pix2_stride+x, i_pix2_stride );
    for( y = 0; y < i_height-15; y += 16 )
    {
        for( x = 0; x < i_width-15; x += 16 )
            SSD(PIXEL_16x16);
        if( x < i_width-7 )
            SSD(PIXEL_8x16);
    }
    if( y < i_height-7 )
        for( x = 0; x < i_width-7; x += 8 )
            SSD(PIXEL_8x8);
#undef SSD
92
    x264_cpu_restore( h->param.cpu );
Laurent Aimar's avatar
Laurent Aimar committed
93

94
95
    return i_sqe;
}
Laurent Aimar's avatar
Laurent Aimar committed
96

97
98
99
100
101
102
103
104
105
106
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
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 */
127
static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
Laurent Aimar's avatar
Laurent Aimar committed
128
                                    x264_sps_t *sps, x264_pps_t *pps,
129
                                    int i_type, int i_idr_pic_id, int i_frame, int i_qp )
Laurent Aimar's avatar
Laurent Aimar committed
130
{
131
    x264_param_t *param = &h->param;
132
    int i;
133

Laurent Aimar's avatar
Laurent Aimar committed
134
135
136
137
138
139
    /* First we fill all field */
    sh->sps = sps;
    sh->pps = pps;

    sh->i_type      = i_type;
    sh->i_first_mb  = 0;
Loren Merritt's avatar
Loren Merritt committed
140
    sh->i_last_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
    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;

158
    sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
Laurent Aimar's avatar
Laurent Aimar committed
159
160
161
162
163

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

164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
    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
183
184
    sh->i_cabac_init_idc = param->i_cabac_init_idc;

185
    sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
Laurent Aimar's avatar
Laurent Aimar committed
186
187
188
    sh->b_sp_for_swidth = 0;
    sh->i_qs_delta = 0;

189
190
191
192
    /* 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
193
194
195
196
197
198
199
200
201
202
203
204
205
    {
        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 )
{
206
207
    int i;

Laurent Aimar's avatar
Laurent Aimar committed
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
249
250
251
252
253
254
255
256
257
258
259
    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 )
    {
260
261
        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
262
        {
263
264
265
266
267
268
269
            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
270
271
272
273
        }
    }
    if( sh->i_type == SLICE_TYPE_B )
    {
274
275
        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
276
        {
277
278
279
280
281
282
            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
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
336
337
338
339
340
        }
    }

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

341
static int x264_validate_parameters( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
342
{
343
    if( h->param.i_width <= 0 || h->param.i_height <= 0 )
Laurent Aimar's avatar
Laurent Aimar committed
344
    {
345
        x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
346
347
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
348
349
    }

350
    if( h->param.i_width % 16 != 0 || h->param.i_height % 16 != 0 )
Laurent Aimar's avatar
Laurent Aimar committed
351
    {
352
        x264_log( h, X264_LOG_ERROR, "width %% 16 != 0 or height %% 16 != 0 (%dx%d)\n",
353
354
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
355
    }
356
    if( h->param.i_csp != X264_CSP_I420 )
Laurent Aimar's avatar
Laurent Aimar committed
357
    {
358
        x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
359
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
360
361
    }

Loren Merritt's avatar
Loren Merritt committed
362
363
364
365
366
367
368
369
370
371
    h->param.i_threads = x264_clip3( h->param.i_threads, 1, X264_SLICE_MAX );
    h->param.i_threads = X264_MIN( h->param.i_threads, h->param.i_height / 16 );
#if !(HAVE_PTHREAD)
    if( h->param.i_threads > 1 )
    {
        x264_log( h, X264_LOG_WARNING, "not compiled with pthread support!\n");
        x264_log( h, X264_LOG_WARNING, "multislicing anyway, but you won't see any speed gain.\n" );
    }
#endif

Loren Merritt's avatar
Loren Merritt committed
372
    h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
373
374
375
    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 );
376

Loren Merritt's avatar
Loren Merritt committed
377
    h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
378
    h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
379
    h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
380
    h->frames.i_delay = h->param.i_bframe;
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;
384
    h->frames.i_max_dpb = X264_MIN( 16, h->frames.i_max_ref0 + h->frames.i_max_ref1 ) + 1;
Laurent Aimar's avatar
Laurent Aimar committed
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 );
Loren Merritt's avatar
Loren Merritt committed
390
391
392
    /* don't yet support merging of cabac stats */
    if( h->param.i_threads > 1 && h->param.i_cabac_init_idc == -1 )
        h->param.i_cabac_init_idc = 0;
Laurent Aimar's avatar
Laurent Aimar committed
393

394
395
    if( h->param.analyse.i_me_method < X264_ME_DIA ||
        h->param.analyse.i_me_method > X264_ME_ESA )
396
        h->param.analyse.i_me_method = X264_ME_HEX;
397
398
399
    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 )
400
        h->param.analyse.i_me_range = 16;
401
    h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 5 );
402
403
    if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
        h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
404
    h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
405
    h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 2048);
406

Loren Merritt's avatar
Loren Merritt committed
407
408
409
410
    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;
411
    h->param.rc.i_qp_constant = x264_clip3(h->param.rc.i_qp_constant, 0, 51);
Loren Merritt's avatar
Loren Merritt committed
412

413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
    return 0;
}

/****************************************************************************
 * x264_encoder_open:
 ****************************************************************************/
x264_t *x264_encoder_open   ( x264_param_t *param )
{
    x264_t *h = x264_malloc( sizeof( x264_t ) );
    int i, i_slice;

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

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

    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 );

440
441
442
    /* VUI */
    if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
    {
443
444
445
        int i_w = param->vui.i_sar_width;
        int i_h = param->vui.i_sar_height;
        int a = i_w, b = i_h;
446
447
448
449
450
451
452
453
454

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

            a = b;
            b = t % b;
        }

455
456
457
        i_w /= a;
        i_h /= a;
        while( i_w > 65535 || i_h > 65535 )
458
        {
459
460
            i_w /= 2;
            i_h /= 2;
461
462
463
464
        }

        h->param.vui.i_sar_width = 0;
        h->param.vui.i_sar_height = 0;
465
        if( i_w == 0 || i_h == 0 )
466
467
468
        {
            x264_log( h, X264_LOG_ERROR, "cannot create valid sample aspect ratio\n" );
        }
469
        else if( i_w == i_h )
470
471
472
473
474
        {
            x264_log( h, X264_LOG_INFO, "no need for a SAR\n" );
        }
        else
        {
475
476
477
            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;
478
479
480
481
        }
    }


Laurent Aimar's avatar
Laurent Aimar committed
482
483
484
485
486
487
488
489
490
491
492
493
494
495
    /* 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);
496
497
    
    h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
498
499

    /* Init frames. */
500
    for( i = 0; i < X264_BFRAME_MAX + 3; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
501
502
503
504
505
    {
        h->frames.current[i] = NULL;
        h->frames.next[i]    = NULL;
        h->frames.unused[i]  = NULL;
    }
506
    for( i = 0; i < 1 + h->frames.i_delay; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
507
508
509
    {
        h->frames.unused[i] =  x264_frame_new( h );
    }
510
    for( i = 0; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
511
512
513
    {
        h->frames.reference[i] = x264_frame_new( h );
    }
514
    h->frames.reference[h->frames.i_max_dpb] = NULL;
515
    h->frames.i_last_idr = - h->param.i_keyint_max;
516
    h->frames.i_input    = 0;
517
    h->frames.last_nonb  = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536

    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 );
537
    x264_mc_init( h->param.cpu, &h->mc );
Laurent Aimar's avatar
Laurent Aimar committed
538
539
540
    x264_csp_init( h->param.cpu, h->param.i_csp, &h->csp );

    /* rate control */
541
542
    if( x264_ratecontrol_new( h ) < 0 )
        return NULL;
543

Laurent Aimar's avatar
Laurent Aimar committed
544
    /* stat */
Loren Merritt's avatar
Loren Merritt committed
545
    for( i_slice = 0; i_slice < 5; i_slice++ )
Laurent Aimar's avatar
Laurent Aimar committed
546
    {
Loren Merritt's avatar
Loren Merritt committed
547
548
549
550
551
552
553
554
555
556
        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
557
    }
558
559
560
561
562
563
564
565
566

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

Loren Merritt's avatar
Loren Merritt committed
567
568
569
570
    h->thread[0] = h;
    for( i = 1; i < param->i_threads; i++ )
        h->thread[i] = x264_malloc( sizeof(x264_t) );

Laurent Aimar's avatar
Laurent Aimar committed
571
572
573
    return h;
}

574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
/****************************************************************************
 * x264_encoder_reconfig:
 ****************************************************************************/
int x264_encoder_reconfig( x264_t *h, x264_param_t *param )
{
    h->param.i_bframe_bias = param->i_bframe_bias;
    h->param.i_deblocking_filter_alphac0 = param->i_deblocking_filter_alphac0;
    h->param.i_deblocking_filter_beta    = param->i_deblocking_filter_beta;
    h->param.analyse.i_me_method = param->analyse.i_me_method;
    h->param.analyse.i_me_range = param->analyse.i_me_range;
    h->param.analyse.i_subpel_refine = param->analyse.i_subpel_refine;
    h->param.analyse.intra = param->analyse.intra;
    h->param.analyse.inter = param->analyse.inter;
    if( h->sps->b_direct8x8_inference && h->param.i_bframe
        && h->param.analyse.i_direct_mv_pred == X264_DIRECT_PRED_TEMPORAL )
        h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
    return x264_validate_parameters( h );
}

Laurent Aimar's avatar
Laurent Aimar committed
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
/* 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 )
    {
629
630
631
632
633
        /* 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
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
        /* 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;
655
    while( list[i] ) i++;
Laurent Aimar's avatar
Laurent Aimar committed
656
657
658
    list[i] = frame;
}

659
660
661
662
663
664
665
666
667
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
668
669
670
671
static x264_frame_t *x264_frame_get( x264_frame_t *list[X264_BFRAME_MAX+1] )
{
    x264_frame_t *frame = list[0];
    int i;
672
    for( i = 0; list[i]; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
673
674
675
676
        list[i] = list[i+1];
    return frame;
}

677
static void x264_frame_sort( x264_frame_t *list[X264_BFRAME_MAX+1], int b_dts )
678
679
680
681
{
    int i, b_ok;
    do {
        b_ok = 1;
682
        for( i = 0; list[i+1]; i++ )
683
        {
684
685
686
687
688
            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 )
689
690
691
692
693
694
695
696
697
            {
                x264_frame_t *tmp = list[i+1];
                list[i+1] = list[i];
                list[i] = tmp;
                b_ok = 0;
            }
        }
    } while( !b_ok );
}
698
699
#define x264_frame_sort_dts(list) x264_frame_sort(list, 1)
#define x264_frame_sort_pts(list) x264_frame_sort(list, 0)
700

701
static inline void x264_reference_build_list( x264_t *h, int i_poc, int i_slice_type )
Laurent Aimar's avatar
Laurent Aimar committed
702
703
704
705
706
707
708
{
    int i;
    int b_ok;

    /* build ref list 0/1 */
    h->i_ref0 = 0;
    h->i_ref1 = 0;
709
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
710
711
712
713
714
715
716
717
718
719
720
721
722
    {
        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];
            }
        }
    }
723

Laurent Aimar's avatar
Laurent Aimar committed
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
    /* 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 );

759
760
761
762
763
    /* 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
764
    {
765
766
767
768
769
770
        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
771
    }
772
773

    h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
774
775
    h->i_ref0 = X264_MIN( h->i_ref0, h->frames.i_max_ref0 );
    h->i_ref0 = X264_MIN( h->i_ref0, 16 - h->i_ref1 );
Laurent Aimar's avatar
Laurent Aimar committed
776
777
778
779
780
781
782
}

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

    /* apply deblocking filter to the current decoded picture */
783
    if( !h->sh.i_disable_deblocking_filter_idc )
Laurent Aimar's avatar
Laurent Aimar committed
784
785
786
787
788
789
790
791
    {
        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 );

792
793
794
795
796
797
    /* create filtered images */
    x264_frame_filter( h->param.cpu, h->fdec );

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

798
799
800
801
802
803
804
805
806
807
808
809
    /* 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
810
    /* move frame in the buffer */
811
812
813
    /* 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
814
815
816
817
818
819
820
821
822
823
824
    {
        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 */
825
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
826
827
828
829
830
831
832
833
834
835
836
    {
        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 )
    {
837
        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
838
839

        /* increment id */
840
        h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
Laurent Aimar's avatar
Laurent Aimar committed
841
842
843
    }
    else
    {
844
        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
845
846
847
848
849
850
851

        /* 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;
    }

852
853
    h->fdec->i_frame_num = h->sh.i_frame_num;

Laurent Aimar's avatar
Laurent Aimar committed
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
    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 );
        }
    }
876
877

    x264_macroblock_slice_init( h );
Laurent Aimar's avatar
Laurent Aimar committed
878
879
}

Loren Merritt's avatar
Loren Merritt committed
880
static int x264_slice_write( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
881
882
883
884
{
    int i_skip;
    int mb_xy;

Loren Merritt's avatar
Loren Merritt committed
885
    memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
Laurent Aimar's avatar
Laurent Aimar committed
886
887

    /* Slice */
Loren Merritt's avatar
Loren Merritt committed
888
    x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
889
890

    /* Slice header */
Loren Merritt's avatar
Loren Merritt committed
891
    x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
892
893
    if( h->param.b_cabac )
    {
894
        /* alignment needed */
Laurent Aimar's avatar
Laurent Aimar committed
895
896
897
898
899
900
901
902
903
        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;

Loren Merritt's avatar
Loren Merritt committed
904
905
906
907
908
#if VISUALIZE
    if( h->param.b_visualize )
        x264_visualize_init( h );
#endif

Loren Merritt's avatar
Loren Merritt committed
909
    for( mb_xy = h->sh.i_first_mb, i_skip = 0; mb_xy < h->sh.i_last_mb; mb_xy++ )
Laurent Aimar's avatar
Laurent Aimar committed
910
911
912
913
    {
        const int i_mb_y = mb_xy / h->sps->i_mb_width;
        const int i_mb_x = mb_xy % h->sps->i_mb_width;

914
915
        int mb_spos = bs_pos(&h->out.bs);

Laurent Aimar's avatar
Laurent Aimar committed
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
        /* 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 );
Loren Merritt's avatar
Loren Merritt committed
933
        if( h->param.b_cabac )
Laurent Aimar's avatar
Laurent Aimar committed
934
        {
Loren Merritt's avatar
Loren Merritt committed
935
936
            if( mb_xy > h->sh.i_first_mb )
                x264_cabac_encode_terminal( &h->cabac, 0 );
Laurent Aimar's avatar
Laurent Aimar committed
937

Loren Merritt's avatar
Loren Merritt committed
938
            if( IS_SKIP( h->mb.i_type ) )
Laurent Aimar's avatar
Laurent Aimar committed
939
940
941
942
943
944
945
                x264_cabac_mb_skip( h, 1 );
            else
            {
                if( h->sh.i_type != SLICE_TYPE_I )
                    x264_cabac_mb_skip( h, 0 );
                x264_macroblock_write_cabac( h, &h->out.bs );
            }
Loren Merritt's avatar
Loren Merritt committed
946
947
948
949
950
        }
        else
        {
            if( IS_SKIP( h->mb.i_type ) )
                i_skip++;
Laurent Aimar's avatar
Laurent Aimar committed
951
952
953
954
955
956
957
958
959
960
961
962
            else
            {
                if( h->sh.i_type != SLICE_TYPE_I )
                {
                    bs_write_ue( &h->out.bs, i_skip );  /* skip run */
                    i_skip = 0;
                }
                x264_macroblock_write_cavlc( h, &h->out.bs );
            }
        }
        TIMER_STOP( i_mtime_write );

Loren Merritt's avatar
Loren Merritt committed
963
964
965
966
967
#if VISUALIZE
        if( h->param.b_visualize )
            x264_visualize_mb( h );
#endif

Laurent Aimar's avatar
Laurent Aimar committed
968
969
970
        /* save cache */
        x264_macroblock_cache_save( h );

971
        h->stat.frame.i_mb_count[h->mb.i_type]++;
972

973
974
        if( h->mb.b_variable_qp )
            x264_ratecontrol_mb(h, bs_pos(&h->out.bs) - mb_spos);
Laurent Aimar's avatar
Laurent Aimar committed
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
    }

    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 );
1007

Loren Merritt's avatar
Loren Merritt committed
1008
1009
1010
1011
1012
1013
1014
1015
#if VISUALIZE
    if( h->param.b_visualize )
    {
        x264_visualize_show( h );
        x264_visualize_close( h );
    }
#endif

1016
1017
    /* Compute misc bits */
    h->stat.frame.i_misc_bits = bs_pos( &h->out.bs )
1018
                              + NALU_OVERHEAD * 8
1019
1020
1021
                              - h->stat.frame.i_itex_bits
                              - h->stat.frame.i_ptex_bits
                              - h->stat.frame.i_hdr_bits;
Loren Merritt's avatar
Loren Merritt committed
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083

    return 0;
}

static inline int x264_slices_write( x264_t *h )
{
    if( h->param.i_threads == 1 )
    {
        x264_slice_write( h );
        return h->out.nal[h->out.i_nal-1].i_payload;
    }
    else
    {
        int i_nal = h->out.i_nal;
        int i_bs_size = h->out.i_bitstream / h->param.i_threads;
        int i_frame_size;
        int i;
        /* duplicate contexts */
        for( i = 0; i < h->param.i_threads; i++ )
        {
            x264_t *t = h->thread[i];
            if( i > 0 )
            {
                memcpy( t, h, sizeof(x264_t) );
                t->out.p_bitstream += i*i_bs_size;
                bs_init( &t->out.bs, t->out.p_bitstream, i_bs_size );
            }
            t->sh.i_first_mb = (i    * h->sps->i_mb_height / h->param.i_threads) * h->sps->i_mb_width;
            t->sh.i_last_mb = ((i+1) * h->sps->i_mb_height / h->param.i_threads) * h->sps->i_mb_width;
            t->out.i_nal = i_nal + i;
        }

        /* dispatch */
#if HAVE_PTHREAD
        {
            pthread_t handles[X264_SLICE_MAX];
            void *status;
            for( i = 0; i < h->param.i_threads; i++ )
                pthread_create( &handles[i], NULL, (void*)x264_slice_write, (void*)h->thread[i] );
            for( i = 0; i < h->param.i_threads; i++ )
                pthread_join( handles[i], &status );
        }
#else
        for( i = 0; i < h->param.i_threads; i++ )
            x264_slice_write( h->thread[i] );
#endif

        /* merge contexts */
        i_frame_size = h->out.nal[i_nal].i_payload;
        for( i = 1; i < h->param.i_threads; i++ )
        {
            int j;
            x264_t *t = h->thread[i];
            h->out.nal[i_nal+i] = t->out.nal[i_nal+i];
            i_frame_size += t->out.nal[i_nal+i].i_payload;
            // all entries in stat.frame are ints
            for( j = 0; j < sizeof(h->stat.frame) / sizeof(int); j++ )
                ((int*)&h->stat.frame)[j] += ((int*)&t->stat.frame)[j];
        }
        h->out.i_nal = i_nal + h->param.i_threads;
        return i_frame_size;
    }
Laurent Aimar's avatar
Laurent Aimar committed
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
}

/****************************************************************************
 * 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,
1101
1102
                             x264_picture_t *pic_in,
                             x264_picture_t *pic_out )
Laurent Aimar's avatar
Laurent Aimar committed
1103
{
1104
    x264_frame_t   *frame_psnr = h->fdec; /* just to keep the current decoded frame for psnr calculation */
Laurent Aimar's avatar
Laurent Aimar committed
1105
1106
1107
    int     i_nal_type;
    int     i_nal_ref_idc;
    int     i_slice_type;
Loren Merritt's avatar
Loren Merritt committed
1108
    int     i_frame_size;
Laurent Aimar's avatar
Laurent Aimar committed
1109
1110
1111
1112
1113

    int i;

    int   i_global_qp;

Loren Merritt's avatar
Loren Merritt committed
1114
1115
    char psz_message[80];

Laurent Aimar's avatar
Laurent Aimar committed
1116
1117
1118
1119
1120
1121
1122
    /* no data out */
    *pi_nal = 0;
    *pp_nal = NULL;


    /* ------------------- Setup new frame from picture -------------------- */
    TIMER_START( i_mtime_encode_frame );
1123
    if( pic_in != NULL )
Laurent Aimar's avatar
Laurent Aimar committed
1124
    {
1125
        /* 1: Copy the picture to a frame and move it to a buffer */
Laurent Aimar's avatar
Laurent Aimar committed
1126
1127
        x264_frame_t *fenc = x264_frame_get( h->frames.unused );

1128
        x264_frame_copy_picture( h, fenc, pic_in );
Laurent Aimar's avatar
Laurent Aimar committed
1129

1130
1131
        fenc->i_frame = h->frames.i_input++;

1132
1133
        x264_frame_put( h->frames.next, fenc );

1134
1135
1136
        x264_frame_init_lowres( h->param.cpu, fenc );

        if( h->frames.i_input <= h->frames.i_delay )
1137
        {
1138
1139
            /* Nothing yet to encode */
            /* waiting for filling bframe buffer */
1140
            pic_out->i_type = X264_TYPE_AUTO;
1141
            return 0;
1142
        }
1143
    }
Laurent Aimar's avatar
Laurent Aimar committed
1144

1145
1146
    if( h->frames.current[0] == NULL )
    {
1147
        int bframes = 0;
1148
1149
1150
        /* 2: Select frame types */
        if( h->frames.next[0] == NULL )
            return 0;
Laurent Aimar's avatar
Laurent Aimar committed
1151

1152
        x264_slicetype_decide( h );
1153
1154

        /* 3: move some B-frames and 1 non-B to encode queue */
1155
        while( IS_X264_TYPE_B( h->frames.next[bframes]->i_type ) )
1156
            bframes++;
1157
1158
1159
1160
1161
1162
1163
1164
1165
        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--;
        }
1166
1167
        while( bframes-- )
            x264_frame_put( h->frames.current, x264_frame_get( h->frames.next ) );
Laurent Aimar's avatar
Laurent Aimar committed
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
    }
    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 */
1178
        pic_out->i_type = X264_TYPE_AUTO;
Laurent Aimar's avatar
Laurent Aimar committed
1179
1180
1181
        return 0;
    }

1182
1183
1184
1185
do_encode:

    if( h->fenc->i_type == X264_TYPE_IDR )
    {
1186
        h->frames.i_last_idr = h->fenc->i_frame;
1187
1188
    }

Laurent Aimar's avatar
Laurent Aimar committed
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
    /* ------------------- 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;
    }
1213
1214
1215
1216
1217
1218
    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
1219
1220
1221
1222
1223
1224
1225
    else    /* B frame */
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_DISPOSABLE;
        i_slice_type = SLICE_TYPE_B;
    }

1226
1227
    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
1228
    h->fdec->i_type = h->fenc->i_type;
Loren Merritt's avatar
Loren Merritt committed
1229
    h->fdec->i_frame = h->fenc->i_frame;
1230
1231
    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
1232
1233
1234
1235



    /* ------------------- Init                ----------------------------- */
Loren Merritt's avatar
Loren Merritt committed
1236
1237
1238
    /* build ref list 0/1 */
    x264_reference_build_list( h, h->fdec->i_poc, i_slice_type );

Laurent Aimar's avatar
Laurent Aimar committed
1239
    /* Init the rate control */
Måns Rullgård's avatar
Måns Rullgård committed
1240
    x264_ratecontrol_start( h, i_slice_type, h->fenc->i_qpplus1 );
1241
    i_global_qp = x264_ratecontrol_qp( h );
1242

1243
1244
    pic_out->i_qpplus1 =
    h->fdec->i_qpplus1 = i_global_qp + 1;
Laurent Aimar's avatar
Laurent Aimar committed
1245

1246
1247
1248
    if( i_slice_type == SLICE_TYPE_B )
        x264_macroblock_bipred_init( h );

Laurent Aimar's avatar
Laurent Aimar committed
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
    /* 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 );

1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
    if(h->param.b_aud){
        int pic_type;

        if(i_slice_type == SLICE_TYPE_I)
            pic_type = 0;
        else if(i_slice_type == SLICE_TYPE_P)
            pic_type = 1;
        else if(i_slice_type == SLICE_TYPE_B)
            pic_type = 2;
        else
            pic_type = 7;

        x264_nal_start(h, NAL_AUD, NAL_PRIORITY_DISPOSABLE);
        bs_write(&h->out.bs, 3, pic_type);
1277
        bs_rbsp_trailing(&h->out.bs);
1278
1279
1280
        x264_nal_end(h);
    }

Loren Merritt's avatar
Loren Merritt committed
1281
1282
1283
    h->i_nal_type = i_nal_type;
    h->i_nal_ref_idc = i_nal_ref_idc;

Laurent Aimar's avatar
Laurent Aimar committed
1284
1285
1286
    /* Write SPS and PPS */
    if( i_nal_type == NAL_SLICE_IDR )
    {
1287
1288
1289
1290
1291
1292
1293
1294
        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
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
        /* 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 );
    }

Loren Merritt's avatar
Loren Merritt committed
1306
1307
    /* Write frame */
    i_frame_size = x264_slices_write( h );
Laurent Aimar's avatar
Laurent Aimar committed
1308

1309
1310
1311
    /* restore CPU state (before using float again) */
    x264_cpu_restore( h->param.cpu );

1312
    if( i_slice_type == SLICE_TYPE_P && !h->param.rc.b_stat_read 
1313
        && h->param.i_scenecut_threshold >= 0 )
1314
    {
1315
        int i_mb_i = h->stat.frame.i_mb_count[I_4x4] + h->stat.frame.i_mb_count[I_16x16];
1316
1317
        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];
1318
        int i_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
1319
1320
1321
        int64_t i_inter_cost = h->stat.frame.i_inter_cost;
        int64_t i_intra_cost = h->stat.frame.i_intra_cost;

1322
1323
        float f_bias;
        int i_gop_size = h->fenc->i_frame - h->frames.i_last_idr;
1324
        float f_thresh_max = h->param.i_scenecut_threshold / 100.0;
Loren Merritt's avatar
Loren Merritt committed
1325
        /* magic numbers pulled out of thin air */
1326
1327
1328
1329
1330
        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;

1331
1332
1333
1334
1335
        /* 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);

1336
        if( i_gop_size < h->param.i_keyint_min / 4 )
1337
            f_bias = f_thresh_min / 4;
1338
1339
        else if( i_gop_size <= h->param.i_keyint_min )
            f_bias = f_thresh_min * i_gop_size / h->param.i_keyint_min;
1340
        else
1341
1342
1343
        {
            f_bias = f_thresh_min
                     + ( f_thresh_max - f_thresh_min )
1344
                       * ( i_gop_size - h->param.i_keyint_min )
1345
1346
1347
                       / ( h->param.i_keyint_max - h->param.i_keyint_min );
        }
        f_bias = X264_MIN( f_bias, 1.0 );
1348

1349
        /* Bad P will be reencoded as I */
1350
        if( i_mb_s < i_mb &&
1351
            i_inter_cost >= (1.0 - f_bias) * i_intra_cost )
1352
        {
1353
            int b;
1354

1355
            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",
Loren Merritt's avatar
Loren Merritt committed
1356
                      h->fenc->i_frame, i_frame_size,
1357
1358
                      (double)i_intra_cost, (double)i_inter_cost,
                      (double)i_inter_cost / i_intra_cost,
1359
                      f_bias, i_gop_size,
1360
                      i_mb_i, i_mb_p, i_mb_s );
1361
1362
1363
1364

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

1365
1366
            for( b = 0; h->frames.current[b] && IS_X264_TYPE_B( h->frames.current[b]->i_type ); b++ );
            if( b > 0 )
1367
1368
1369
1370
1371
1372
1373
1374
1375
            {
                /* 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.
                 * 
                 * We don't yet know exactly which frame is the scene cut, so
                 * we can't assign an I-frame. Instead, change the previous
                 * B-frame to P, and rearrange coding order. */

1376
1377
1378
1379
1380
1381
                if( h->param.b_bframe_adaptive || b > 1 )
                    h->fenc->i_type = X264_TYPE_AUTO;
                x264_frame_sort_pts( h->frames.current );
                x264_frame_push( h->frames.next, h->fenc );
                h->fenc = h->frames.current[b-1];
                h->frames.current[b-1] = NULL;
1382
                h->fenc->i_type = X264_TYPE_P;
1383
                x264_frame_sort_dts( h->frames.current );
1384
            }
1385
            /* Do IDR if needed */
1386
            else if( i_gop_size >= h->param.i_keyint_min )
1387
            {
1388
                x264_frame_t *tmp;
1389

1390
1391
                /* Reset */
                h->i_frame_num = 0;