encoder.c 55.6 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
#if HAVE_PTHREAD
30
31
32
33
34
35
#ifdef SYS_BEOS
#include <kernel/OS.h>
#define pthread_t               thread_id
#define pthread_create(t,u,f,d) *(t)=spawn_thread(f,"",10,d)
#define pthread_join(t,s)       wait_for_thread(t,(long*)s)
#else
Loren Merritt's avatar
Loren Merritt committed
36
37
#include <pthread.h>
#endif
38
#endif
Loren Merritt's avatar
Loren Merritt committed
39

40
41
#include "common/common.h"
#include "common/cpu.h"
Laurent Aimar's avatar
Laurent Aimar committed
42
43
44
45
46
47

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

Loren Merritt's avatar
Loren Merritt committed
48
49
50
51
#if VISUALIZE
#include "common/visualize.h"
#endif

Laurent Aimar's avatar
Laurent Aimar committed
52
//#define DEBUG_MB_TYPE
53
//#define DEBUG_DUMP_FRAME
54
//#define DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
55

56
#ifdef DEBUG_BENCHMARK
Laurent Aimar's avatar
Laurent Aimar committed
57
58
59
60
61
62
63
64
65
66
67
68
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;\
    }
69
70
71
72
#else
#define TIMER_START( d )
#define TIMER_STOP( d )
#endif
Laurent Aimar's avatar
Laurent Aimar committed
73

74
#define NALU_OVERHEAD 5 // startcode + NAL type costs 5 bytes per frame
Laurent Aimar's avatar
Laurent Aimar committed
75
76
77
78
79
80

/****************************************************************************
 *
 ******************************* x264 libs **********************************
 *
 ****************************************************************************/
81
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
82
83
84
85
{
    int64_t i_sqe = 0;
    int x, y;

86
87
88
89
90
91
92
93
94
95
96
97
98
#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
99
    x264_cpu_restore( h->param.cpu );
Laurent Aimar's avatar
Laurent Aimar committed
100

101
102
    return i_sqe;
}
Laurent Aimar's avatar
Laurent Aimar committed
103

104
105
106
107
108
109
110
111
112
113
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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
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 */
134
static void x264_slice_header_init( x264_t *h, x264_slice_header_t *sh,
Laurent Aimar's avatar
Laurent Aimar committed
135
                                    x264_sps_t *sps, x264_pps_t *pps,
136
                                    int i_type, int i_idr_pic_id, int i_frame, int i_qp )
Laurent Aimar's avatar
Laurent Aimar committed
137
{
138
    x264_param_t *param = &h->param;
139
    int i;
140

Laurent Aimar's avatar
Laurent Aimar committed
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;
Loren Merritt's avatar
Loren Merritt committed
147
    sh->i_last_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
    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;

165
    sh->b_direct_spatial_mv_pred = ( param->analyse.i_direct_mv_pred == X264_DIRECT_PRED_SPATIAL );
Laurent Aimar's avatar
Laurent Aimar committed
166
167
168
169
170

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

171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
    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
190
191
    sh->i_cabac_init_idc = param->i_cabac_init_idc;

192
    sh->i_qp_delta = i_qp - pps->i_pic_init_qp;
Laurent Aimar's avatar
Laurent Aimar committed
193
194
195
    sh->b_sp_for_swidth = 0;
    sh->i_qs_delta = 0;

196
197
198
199
    /* 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
200
201
202
203
204
205
206
207
208
209
210
211
212
    {
        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 )
{
213
214
    int i;

Laurent Aimar's avatar
Laurent Aimar committed
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
    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 )
    {
267
268
        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
269
        {
270
271
272
273
274
275
276
            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
277
278
279
280
        }
    }
    if( sh->i_type == SLICE_TYPE_B )
    {
281
282
        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
283
        {
284
285
286
287
288
289
            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
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
341
342
343
344
345
346
347
        }
    }

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

348
static int x264_validate_parameters( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
349
{
350
    if( h->param.i_width <= 0 || h->param.i_height <= 0 )
Laurent Aimar's avatar
Laurent Aimar committed
351
    {
352
        x264_log( h, X264_LOG_ERROR, "invalid width x height (%dx%d)\n",
353
354
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
355
356
    }

357
    if( h->param.i_width % 16 != 0 || h->param.i_height % 16 != 0 )
Laurent Aimar's avatar
Laurent Aimar committed
358
    {
359
        x264_log( h, X264_LOG_ERROR, "width %% 16 != 0 or height %% 16 != 0 (%dx%d)\n",
360
361
                  h->param.i_width, h->param.i_height );
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
362
    }
363
    if( h->param.i_csp != X264_CSP_I420 )
Laurent Aimar's avatar
Laurent Aimar committed
364
    {
365
        x264_log( h, X264_LOG_ERROR, "invalid CSP (only I420 supported)\n" );
366
        return -1;
Laurent Aimar's avatar
Laurent Aimar committed
367
368
    }

Loren Merritt's avatar
Loren Merritt committed
369
370
371
372
373
374
375
376
377
378
    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
379
    h->param.i_frame_reference = x264_clip3( h->param.i_frame_reference, 1, 16 );
380
381
382
    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 );
383

Loren Merritt's avatar
Loren Merritt committed
384
    h->param.i_bframe = x264_clip3( h->param.i_bframe, 0, X264_BFRAME_MAX );
385
    h->param.i_bframe_bias = x264_clip3( h->param.i_bframe_bias, -90, 100 );
386
    h->param.b_bframe_pyramid = h->param.b_bframe_pyramid && h->param.i_bframe > 1;
387
    h->frames.i_delay = h->param.i_bframe;
388
389
390
    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;
391
    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
392
393
394
395
396

    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
397
398
399
    /* 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
400

401
402
    if( h->param.analyse.i_me_method < X264_ME_DIA ||
        h->param.analyse.i_me_method > X264_ME_ESA )
403
        h->param.analyse.i_me_method = X264_ME_HEX;
404
405
406
    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 )
407
        h->param.analyse.i_me_range = 16;
408
    h->param.analyse.i_subpel_refine = x264_clip3( h->param.analyse.i_subpel_refine, 1, 5 );
409
410
    if( !(h->param.analyse.inter & X264_ANALYSE_PSUB16x16) )
        h->param.analyse.inter &= ~X264_ANALYSE_PSUB8x8;
411
    h->param.analyse.i_chroma_qp_offset = x264_clip3(h->param.analyse.i_chroma_qp_offset, -12, 12);
412
    h->param.analyse.i_mv_range = x264_clip3(h->param.analyse.i_mv_range, 32, 2048);
413

Loren Merritt's avatar
Loren Merritt committed
414
415
416
417
    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;
418
    h->param.rc.i_qp_constant = x264_clip3(h->param.rc.i_qp_constant, 0, 51);
Loren Merritt's avatar
Loren Merritt committed
419

420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
    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 );

447
448
449
    /* VUI */
    if( h->param.vui.i_sar_width > 0 && h->param.vui.i_sar_height > 0 )
    {
450
451
452
        int i_w = param->vui.i_sar_width;
        int i_h = param->vui.i_sar_height;
        int a = i_w, b = i_h;
453
454
455
456
457
458
459
460
461

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

            a = b;
            b = t % b;
        }

462
463
464
        i_w /= a;
        i_h /= a;
        while( i_w > 65535 || i_h > 65535 )
465
        {
466
467
            i_w /= 2;
            i_h /= 2;
468
469
470
471
        }

        h->param.vui.i_sar_width = 0;
        h->param.vui.i_sar_height = 0;
472
        if( i_w == 0 || i_h == 0 )
473
474
475
        {
            x264_log( h, X264_LOG_ERROR, "cannot create valid sample aspect ratio\n" );
        }
476
        else if( i_w == i_h )
477
478
479
480
481
        {
            x264_log( h, X264_LOG_INFO, "no need for a SAR\n" );
        }
        else
        {
482
483
484
            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;
485
486
487
488
        }
    }


Laurent Aimar's avatar
Laurent Aimar committed
489
490
491
492
493
494
495
496
497
498
499
500
501
502
    /* 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);
503
504
    
    h->mb.i_mb_count = h->sps->i_mb_width * h->sps->i_mb_height;
Laurent Aimar's avatar
Laurent Aimar committed
505
506

    /* Init frames. */
507
    for( i = 0; i < X264_BFRAME_MAX + 3; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
508
509
510
511
512
    {
        h->frames.current[i] = NULL;
        h->frames.next[i]    = NULL;
        h->frames.unused[i]  = NULL;
    }
513
    for( i = 0; i < 1 + h->frames.i_delay; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
514
515
516
    {
        h->frames.unused[i] =  x264_frame_new( h );
    }
517
    for( i = 0; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
518
519
520
    {
        h->frames.reference[i] = x264_frame_new( h );
    }
521
    h->frames.reference[h->frames.i_max_dpb] = NULL;
522
    h->frames.i_last_idr = - h->param.i_keyint_max;
523
    h->frames.i_input    = 0;
524
    h->frames.last_nonb  = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543

    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 );
544
    x264_mc_init( h->param.cpu, &h->mc );
Laurent Aimar's avatar
Laurent Aimar committed
545
546
547
    x264_csp_init( h->param.cpu, h->param.i_csp, &h->csp );

    /* rate control */
548
549
    if( x264_ratecontrol_new( h ) < 0 )
        return NULL;
550

Laurent Aimar's avatar
Laurent Aimar committed
551
    /* stat */
Loren Merritt's avatar
Loren Merritt committed
552
    for( i_slice = 0; i_slice < 5; i_slice++ )
Laurent Aimar's avatar
Laurent Aimar committed
553
    {
Loren Merritt's avatar
Loren Merritt committed
554
555
556
557
558
559
560
561
562
563
        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
564
    }
565
566
567
568
569
570
571
572
573

    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
574
575
576
577
    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
578
579
580
    return h;
}

581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
/****************************************************************************
 * 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
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
629
630
631
632
633
634
635
/* 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 )
    {
636
637
638
639
640
        /* 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
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
        /* 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;
662
    while( list[i] ) i++;
Laurent Aimar's avatar
Laurent Aimar committed
663
664
665
    list[i] = frame;
}

666
667
668
669
670
671
672
673
674
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
675
676
677
678
static x264_frame_t *x264_frame_get( x264_frame_t *list[X264_BFRAME_MAX+1] )
{
    x264_frame_t *frame = list[0];
    int i;
679
    for( i = 0; list[i]; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
680
681
682
683
        list[i] = list[i+1];
    return frame;
}

684
static void x264_frame_sort( x264_frame_t *list[X264_BFRAME_MAX+1], int b_dts )
685
686
687
688
{
    int i, b_ok;
    do {
        b_ok = 1;
689
        for( i = 0; list[i+1]; i++ )
690
        {
691
692
693
694
695
            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 )
696
697
698
699
700
701
702
703
704
            {
                x264_frame_t *tmp = list[i+1];
                list[i+1] = list[i];
                list[i] = tmp;
                b_ok = 0;
            }
        }
    } while( !b_ok );
}
705
706
#define x264_frame_sort_dts(list) x264_frame_sort(list, 1)
#define x264_frame_sort_pts(list) x264_frame_sort(list, 0)
707

708
static inline void x264_reference_build_list( x264_t *h, int i_poc, int i_slice_type )
Laurent Aimar's avatar
Laurent Aimar committed
709
710
711
712
713
714
715
{
    int i;
    int b_ok;

    /* build ref list 0/1 */
    h->i_ref0 = 0;
    h->i_ref1 = 0;
716
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
717
718
719
720
721
722
723
724
725
726
727
728
729
    {
        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];
            }
        }
    }
730

Laurent Aimar's avatar
Laurent Aimar committed
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
    /* 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 );

766
767
768
769
770
    /* 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
771
    {
772
773
774
775
776
777
        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
778
    }
779
780

    h->i_ref1 = X264_MIN( h->i_ref1, h->frames.i_max_ref1 );
781
782
    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
783
784
785
786
787
788
789
}

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

    /* apply deblocking filter to the current decoded picture */
790
    if( !h->sh.i_disable_deblocking_filter_idc )
Laurent Aimar's avatar
Laurent Aimar committed
791
792
793
794
795
796
797
798
    {
        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 );

799
800
801
802
803
804
    /* create filtered images */
    x264_frame_filter( h->param.cpu, h->fdec );

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

805
806
807
808
809
810
811
812
813
814
815
816
    /* 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
817
    /* move frame in the buffer */
818
819
820
    /* 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
821
822
823
824
825
826
827
828
829
830
831
    {
        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 */
832
    for( i = 1; i < h->frames.i_max_dpb; i++ )
Laurent Aimar's avatar
Laurent Aimar committed
833
834
835
836
837
838
839
840
841
842
843
    {
        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 )
    {
844
        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
845
846

        /* increment id */
847
        h->i_idr_pic_id = ( h->i_idr_pic_id + 1 ) % 65536;
Laurent Aimar's avatar
Laurent Aimar committed
848
849
850
    }
    else
    {
851
        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
852
853
854
855
856
857
858

        /* 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;
    }

859
860
    h->fdec->i_frame_num = h->sh.i_frame_num;

Laurent Aimar's avatar
Laurent Aimar committed
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
    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 );
        }
    }
883
884

    x264_macroblock_slice_init( h );
Laurent Aimar's avatar
Laurent Aimar committed
885
886
}

Loren Merritt's avatar
Loren Merritt committed
887
static int x264_slice_write( x264_t *h )
Laurent Aimar's avatar
Laurent Aimar committed
888
889
890
891
{
    int i_skip;
    int mb_xy;

Loren Merritt's avatar
Loren Merritt committed
892
    memset( &h->stat.frame, 0, sizeof(h->stat.frame) );
Laurent Aimar's avatar
Laurent Aimar committed
893
894

    /* Slice */
Loren Merritt's avatar
Loren Merritt committed
895
    x264_nal_start( h, h->i_nal_type, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
896
897

    /* Slice header */
Loren Merritt's avatar
Loren Merritt committed
898
    x264_slice_header_write( &h->out.bs, &h->sh, h->i_nal_ref_idc );
Laurent Aimar's avatar
Laurent Aimar committed
899
900
    if( h->param.b_cabac )
    {
901
        /* alignment needed */
Laurent Aimar's avatar
Laurent Aimar committed
902
903
904
905
906
907
908
909
910
        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
911
912
913
914
915
#if VISUALIZE
    if( h->param.b_visualize )
        x264_visualize_init( h );
#endif

Loren Merritt's avatar
Loren Merritt committed
916
    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
917
918
919
920
    {
        const int i_mb_y = mb_xy / h->sps->i_mb_width;
        const int i_mb_x = mb_xy % h->sps->i_mb_width;

921
922
        int mb_spos = bs_pos(&h->out.bs);

Laurent Aimar's avatar
Laurent Aimar committed
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
        /* 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
940
        if( h->param.b_cabac )
Laurent Aimar's avatar
Laurent Aimar committed
941
        {
Loren Merritt's avatar
Loren Merritt committed
942
943
            if( mb_xy > h->sh.i_first_mb )
                x264_cabac_encode_terminal( &h->cabac, 0 );
Laurent Aimar's avatar
Laurent Aimar committed
944

Loren Merritt's avatar
Loren Merritt committed
945
            if( IS_SKIP( h->mb.i_type ) )
Laurent Aimar's avatar
Laurent Aimar committed
946
947
948
949
950
951
952
                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
953
954
955
956
957
        }
        else
        {
            if( IS_SKIP( h->mb.i_type ) )
                i_skip++;
Laurent Aimar's avatar
Laurent Aimar committed
958
959
960
961
962
963
964
965
966
967
968
969
            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
970
971
972
973
974
#if VISUALIZE
        if( h->param.b_visualize )
            x264_visualize_mb( h );
#endif

Laurent Aimar's avatar
Laurent Aimar committed
975
976
977
        /* save cache */
        x264_macroblock_cache_save( h );

978
        h->stat.frame.i_mb_count[h->mb.i_type]++;
979

980
981
        if( h->mb.b_variable_qp )
            x264_ratecontrol_mb(h, bs_pos(&h->out.bs) - mb_spos);
Laurent Aimar's avatar
Laurent Aimar committed
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
1007
1008
1009
1010
1011
1012
1013
    }

    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 );
1014

Loren Merritt's avatar
Loren Merritt committed
1015
1016
1017
1018
1019
1020
1021
1022
#if VISUALIZE
    if( h->param.b_visualize )
    {
        x264_visualize_show( h );
        x264_visualize_close( h );
    }
#endif

1023
1024
    /* Compute misc bits */
    h->stat.frame.i_misc_bits = bs_pos( &h->out.bs )
1025
                              + NALU_OVERHEAD * 8
1026
1027
1028
                              - 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
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
1084
1085
1086
1087
1088
1089
1090

    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
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
}

/****************************************************************************
 * 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,
1108
1109
                             x264_picture_t *pic_in,
                             x264_picture_t *pic_out )
Laurent Aimar's avatar
Laurent Aimar committed
1110
{
1111
    x264_frame_t   *frame_psnr = h->fdec; /* just to keep the current decoded frame for psnr calculation */
Laurent Aimar's avatar
Laurent Aimar committed
1112
1113
1114
    int     i_nal_type;
    int     i_nal_ref_idc;
    int     i_slice_type;
Loren Merritt's avatar
Loren Merritt committed
1115
    int     i_frame_size;
Laurent Aimar's avatar
Laurent Aimar committed
1116
1117
1118
1119
1120

    int i;

    int   i_global_qp;

Loren Merritt's avatar
Loren Merritt committed
1121
1122
    char psz_message[80];

Laurent Aimar's avatar
Laurent Aimar committed
1123
1124
1125
1126
1127
1128
1129
    /* no data out */
    *pi_nal = 0;
    *pp_nal = NULL;


    /* ------------------- Setup new frame from picture -------------------- */
    TIMER_START( i_mtime_encode_frame );
1130
    if( pic_in != NULL )
Laurent Aimar's avatar
Laurent Aimar committed
1131
    {
1132
        /* 1: Copy the picture to a frame and move it to a buffer */
Laurent Aimar's avatar
Laurent Aimar committed
1133
1134
        x264_frame_t *fenc = x264_frame_get( h->frames.unused );

1135
        x264_frame_copy_picture( h, fenc, pic_in );
Laurent Aimar's avatar
Laurent Aimar committed
1136

1137
1138
        fenc->i_frame = h->frames.i_input++;

1139
1140
        x264_frame_put( h->frames.next, fenc );

1141
1142
1143
        x264_frame_init_lowres( h->param.cpu, fenc );

        if( h->frames.i_input <= h->frames.i_delay )
1144
        {
1145
1146
            /* Nothing yet to encode */
            /* waiting for filling bframe buffer */
1147
            pic_out->i_type = X264_TYPE_AUTO;
1148
            return 0;
1149
        }
1150
    }
Laurent Aimar's avatar
Laurent Aimar committed
1151

1152
1153
    if( h->frames.current[0] == NULL )
    {
1154
        int bframes = 0;
1155
1156
1157
        /* 2: Select frame types */
        if( h->frames.next[0] == NULL )
            return 0;
Laurent Aimar's avatar
Laurent Aimar committed
1158

1159
        x264_slicetype_decide( h );
1160
1161

        /* 3: move some B-frames and 1 non-B to encode queue */
1162
        while( IS_X264_TYPE_B( h->frames.next[bframes]->i_type ) )
1163
            bframes++;
1164
1165
1166
1167
1168
1169
1170
1171
1172
        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--;
        }
1173
1174
        while( bframes-- )
            x264_frame_put( h->frames.current, x264_frame_get( h->frames.next ) );
Laurent Aimar's avatar
Laurent Aimar committed
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
    }
    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 */
1185
        pic_out->i_type = X264_TYPE_AUTO;
Laurent Aimar's avatar
Laurent Aimar committed
1186
1187
1188
        return 0;
    }

1189
1190
1191
1192
do_encode:

    if( h->fenc->i_type == X264_TYPE_IDR )
    {
1193
        h->frames.i_last_idr = h->fenc->i_frame;
1194
1195
    }

Laurent Aimar's avatar
Laurent Aimar committed
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
    /* ------------------- 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;
    }
1220
1221
1222
1223
1224
1225
    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
1226
1227
1228
1229
1230
1231
1232
    else    /* B frame */
    {
        i_nal_type    = NAL_SLICE;
        i_nal_ref_idc = NAL_PRIORITY_DISPOSABLE;
        i_slice_type = SLICE_TYPE_B;
    }

1233
1234
    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
1235
    h->fdec->i_type = h->fenc->i_type;
Loren Merritt's avatar
Loren Merritt committed
1236
    h->fdec->i_frame = h->fenc->i_frame;
1237
1238
    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
1239
1240
1241
1242



    /* ------------------- Init                ----------------------------- */
Loren Merritt's avatar
Loren Merritt committed
1243
1244
1245
    /* build ref list 0/1 */
    x264_reference_build_list( h, h->fdec->i_poc, i_slice_type );

Laurent Aimar's avatar
Laurent Aimar committed
1246
    /* Init the rate control */
Måns Rullgård's avatar
Måns Rullgård committed
1247
    x264_ratecontrol_start( h, i_slice_type, h->fenc->i_qpplus1 );
1248
    i_global_qp = x264_ratecontrol_qp( h );
1249

1250
1251
    pic_out->i_qpplus1 =
    h->fdec->i_qpplus1 = i_global_qp + 1;
Laurent Aimar's avatar
Laurent Aimar committed
1252

1253
1254
1255
    if( i_slice_type == SLICE_TYPE_B )
        x264_macroblock_bipred_init( h );

Laurent Aimar's avatar
Laurent Aimar committed
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
    /* 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 );

1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
    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);
1284
        bs_rbsp_trailing(&h->out.bs);
1285
1286
1287
        x264_nal_end(h);
    }

Loren Merritt's avatar
Loren Merritt committed
1288
1289
1290
    h->i_nal_type = i_nal_type;
    h->i_nal_ref_idc = i_nal_ref_idc;

Laurent Aimar's avatar
Laurent Aimar committed
1291
1292
1293
    /* Write SPS and PPS */
    if( i_nal_type == NAL_SLICE_IDR )
    {
1294
1295
1296
1297
1298
1299
1300
1301
        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
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
        /* 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
1313
1314
    /* Write frame */
    i_frame_size = x264_slices_write( h );
Laurent Aimar's avatar
Laurent Aimar committed
1315

1316
1317
1318
    /* restore CPU state (before using float again) */
    x264_cpu_restore( h->param.cpu );

1319
    if( i_slice_type == SLICE_TYPE_P && !h->param.rc.b_stat_read 
1320
        && h->param.i_scenecut_threshold >= 0 )
1321
    {
1322
        int i_mb_i = h->stat.frame.i_mb_count[I_4x4] + h->stat.frame.i_mb_count[I_16x16];
1323
1324
        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];
1325
        int i_mb   = h->sps->i_mb_width * h->sps->i_mb_height;
1326
1327
1328
        int64_t i_inter_cost = h->stat.frame.i_inter_cost;
        int64_t i_intra_cost = h->stat.frame.i_intra_cost;

1329
1330
        float f_bias;
        int i_gop_size = h->fenc->i_frame - h->frames.i_last_idr;
1331
        float f_thresh_max = h->param.i_scenecut_threshold / 100.0;
Loren Merritt's avatar
Loren Merritt committed
1332
        /* magic numbers pulled out of thin air */
1333
1334
1335
1336
1337
        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;

1338
1339
1340
1341
1342
        /* 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);

1343
        if( i_gop_size < h->param.i_keyint_min / 4 )
1344
            f_bias = f_thresh_min / 4;
1345
1346
        else if( i_gop_size <= h->param.i_keyint_min )
            f_bias = f_thresh_min * i_gop_size / h->param.i_keyint_min;
1347
        else
1348
1349
1350
        {
            f_bias = f_thresh_min
                     + ( f_thresh_max - f_thresh_min )
1351
                       * ( i_gop_size - h->param.i_keyint_min )
1352
1353
1354
                       / ( h->param.i_keyint_max - h->param.i_keyint_min );
        }
        f_bias = X264_MIN( f_bias, 1.0 );
1355

1356
        /* Bad P will be reencoded as I */
1357
        if( i_mb_s < i_mb &&
1358
            i_inter_cost >= (1.0 - f_bias) * i_intra_cost )
1359
        {
1360
            int b;
1361

1362
            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
1363
                      h->fenc->i_frame, i_frame_size,
1364
1365
                      (double)i_intra_cost, (double)i_inter_cost,
                      (double)i_inter_cost / i_intra_cost,
1366
                      f_bias, i_gop_size,
1367
                      i_mb_i, i_mb_p, i_mb_s );
1368
1369
1370
1371

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

1372
1373
            for( b = 0; h->frames.current[b] && IS_X264_TYPE_B( h->frames.current[b]->i_type ); b++ );
            if( b > 0 )
1374
1375
1376
1377
1378
1379
1380
1381
1382
            {
                /* 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. */

1383
1384
1385
1386
1387
1388
                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;
1389
                h->fenc->i_type = X264_TYPE_P;
1390
                x264_frame_sort_dts( h->frames.current );
1391
            }
1392
            /* Do IDR if needed */
1393
            else if( i_gop_size >= h->param.i_keyint_min )