Statistics
| Branch: | Revision:

ffmpeg / libavcodec / mpegvideo.c @ bd31a775

History | View | Annotate | Download (57.4 KB)

1
/*
2
 * The simplest mpeg encoder (well, it was the simplest!)
3
 * Copyright (c) 2000,2001 Gerard Lantau.
4
 *
5
 * This program is free software; you can redistribute it and/or modify
6
 * it under the terms of the GNU General Public License as published by
7
 * the Free Software Foundation; either version 2 of the License, or
8
 * (at your option) any later version.
9
 *
10
 * This program is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
 * GNU General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU General Public License
16
 * along with this program; if not, write to the Free Software
17
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18
 */
19
#include <stdlib.h>
20
#include <stdio.h>
21
#include <math.h>
22
#include <string.h>
23
#include "avcodec.h"
24
#include "dsputil.h"
25
#include "mpegvideo.h"
26

    
27
#ifdef USE_FASTMEMCPY
28
#include "fastmemcpy.h"
29
#endif
30

    
31
static void encode_picture(MpegEncContext *s, int picture_number);
32
static void rate_control_init(MpegEncContext *s);
33
static int rate_estimate_qscale(MpegEncContext *s);
34
static void dct_unquantize_mpeg1_c(MpegEncContext *s, 
35
                                   DCTELEM *block, int n, int qscale);
36
static void dct_unquantize_h263_c(MpegEncContext *s, 
37
                                  DCTELEM *block, int n, int qscale);
38
static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w);
39
static int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale);
40

    
41
int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale)= dct_quantize_c;
42
void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w)= draw_edges_c;
43

    
44
#define EDGE_WIDTH 16
45

    
46
/* enable all paranoid tests for rounding, overflows, etc... */
47
//#define PARANOID
48

    
49
//#define DEBUG
50

    
51
/* for jpeg fast DCT */
52
#define CONST_BITS 14
53

    
54
static const unsigned short aanscales[64] = {
55
    /* precomputed values scaled up by 14 bits */
56
    16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
57
    22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
58
    21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
59
    19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,
60
    16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
61
    12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,
62
    8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,
63
    4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
64
};
65

    
66
static UINT8 h263_chroma_roundtab[16] = {
67
    0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
68
};
69

    
70
/* default motion estimation */
71
int motion_estimation_method = ME_LOG;
72

    
73
extern UINT8 zigzag_end[64];
74

    
75
static void convert_matrix(int *qmat, UINT16 *qmat16, const UINT16 *quant_matrix, int qscale)
76
{
77
    int i;
78

    
79
    if (av_fdct == jpeg_fdct_ifast) {
80
        for(i=0;i<64;i++) {
81
            /* 16 <= qscale * quant_matrix[i] <= 7905 */
82
            /* 19952         <= aanscales[i] * qscale * quant_matrix[i]           <= 249205026 */
83
            /* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
84
            /* 3444240       >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
85
            
86
            qmat[block_permute_op(i)] = (int)((UINT64_C(1) << (QMAT_SHIFT + 11)) / 
87
                            (aanscales[i] * qscale * quant_matrix[block_permute_op(i)]));
88
        }
89
    } else {
90
        for(i=0;i<64;i++) {
91
            /* We can safely suppose that 16 <= quant_matrix[i] <= 255
92
               So 16           <= qscale * quant_matrix[i]             <= 7905
93
               so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
94
               so 32768        >= (1<<19) / (qscale * quant_matrix[i]) >= 67
95
            */
96
            qmat[i]   = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[i]);
97
            qmat16[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[block_permute_op(i)]);
98
        }
99
    }
100
}
101

    
102
/* init common structure for both encoder and decoder */
103
int MPV_common_init(MpegEncContext *s)
104
{
105
    int c_size, i;
106
    UINT8 *pict;
107

    
108
    if (s->out_format == FMT_H263) 
109
        s->dct_unquantize = dct_unquantize_h263_c;
110
    else
111
        s->dct_unquantize = dct_unquantize_mpeg1_c;
112
        
113
#ifdef HAVE_MMX
114
    MPV_common_init_mmx(s);
115
#endif
116
    s->mb_width = (s->width + 15) / 16;
117
    s->mb_height = (s->height + 15) / 16;
118
    s->mb_num = s->mb_width * s->mb_height;
119
    s->linesize = s->mb_width * 16 + 2 * EDGE_WIDTH;
120

    
121
    for(i=0;i<3;i++) {
122
        int w, h, shift, pict_start;
123

    
124
        w = s->linesize;
125
        h = s->mb_height * 16 + 2 * EDGE_WIDTH;
126
        shift = (i == 0) ? 0 : 1;
127
        c_size = (w >> shift) * (h >> shift);
128
        pict_start = (w >> shift) * (EDGE_WIDTH >> shift) + (EDGE_WIDTH >> shift);
129

    
130
        pict = av_mallocz(c_size);
131
        if (pict == NULL)
132
            goto fail;
133
        s->last_picture_base[i] = pict;
134
        s->last_picture[i] = pict + pict_start;
135
    
136
        pict = av_mallocz(c_size);
137
        if (pict == NULL)
138
            goto fail;
139
        s->next_picture_base[i] = pict;
140
        s->next_picture[i] = pict + pict_start;
141

    
142
        if (s->has_b_frames) {
143
            pict = av_mallocz(c_size);
144
            if (pict == NULL) 
145
                goto fail;
146
            s->aux_picture_base[i] = pict;
147
            s->aux_picture[i] = pict + pict_start;
148
        }
149
    }
150
    
151
    if (s->encoding) {
152
        /* Allocate MB type table */
153
        s->mb_type = av_mallocz(s->mb_num * sizeof(char));
154
        if (s->mb_type == NULL) {
155
            perror("malloc");
156
            goto fail;
157
        }
158
        
159
        s->mb_var = av_mallocz(s->mb_num * sizeof(INT16));
160
        if (s->mb_var == NULL) {
161
            perror("malloc");
162
            goto fail;
163
        }
164
        /* Allocate MV table */
165
        /* By now we just have one MV per MB */
166
        s->mv_table[0] = av_mallocz(s->mb_num * sizeof(INT16));
167
        s->mv_table[1] = av_mallocz(s->mb_num * sizeof(INT16));
168
        if (s->mv_table[1] == NULL || s->mv_table[0] == NULL) {
169
            perror("malloc");
170
            goto fail;
171
        }
172
    }
173
    
174
    if (s->out_format == FMT_H263) {
175
        int size;
176
        /* MV prediction */
177
        size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
178
        s->motion_val = malloc(size * 2 * sizeof(INT16));
179
        if (s->motion_val == NULL)
180
            goto fail;
181
        memset(s->motion_val, 0, size * 2 * sizeof(INT16));
182
    }
183

    
184
    if (s->h263_pred || s->h263_plus) {
185
        int y_size, c_size, i, size;
186
        
187
        /* dc values */
188

    
189
        y_size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
190
        c_size = (s->mb_width + 2) * (s->mb_height + 2);
191
        size = y_size + 2 * c_size;
192
        s->dc_val[0] = malloc(size * sizeof(INT16));
193
        if (s->dc_val[0] == NULL)
194
            goto fail;
195
        s->dc_val[1] = s->dc_val[0] + y_size;
196
        s->dc_val[2] = s->dc_val[1] + c_size;
197
        for(i=0;i<size;i++)
198
            s->dc_val[0][i] = 1024;
199

    
200
        /* ac values */
201
        s->ac_val[0] = av_mallocz(size * sizeof(INT16) * 16);
202
        if (s->ac_val[0] == NULL)
203
            goto fail;
204
        s->ac_val[1] = s->ac_val[0] + y_size;
205
        s->ac_val[2] = s->ac_val[1] + c_size;
206
        
207
        /* cbp values */
208
        s->coded_block = av_mallocz(y_size);
209
        if (!s->coded_block)
210
            goto fail;
211

    
212
        /* which mb is a intra block */
213
        s->mbintra_table = av_mallocz(s->mb_num);
214
        if (!s->mbintra_table)
215
            goto fail;
216
        memset(s->mbintra_table, 1, s->mb_num);
217
    }
218
    /* default structure is frame */
219
    s->picture_structure = PICT_FRAME;
220

    
221
    /* init macroblock skip table */
222
    if (!s->encoding) {
223
        s->mbskip_table = av_mallocz(s->mb_num);
224
        if (!s->mbskip_table)
225
            goto fail;
226
    }
227

    
228
    s->context_initialized = 1;
229
    return 0;
230
 fail:
231
    MPV_common_end(s);
232
    return -1;
233
}
234

    
235
/* init common structure for both encoder and decoder */
236
void MPV_common_end(MpegEncContext *s)
237
{
238
    int i;
239

    
240
    if (s->mb_type)
241
        free(s->mb_type);
242
    if (s->mb_var)
243
        free(s->mb_var);
244
    if (s->mv_table[0])
245
        free(s->mv_table[0]);
246
    if (s->mv_table[1])
247
        free(s->mv_table[1]);
248
    if (s->motion_val)
249
        free(s->motion_val);
250
    if (s->dc_val[0])
251
        free(s->dc_val[0]);
252
    if (s->ac_val[0])
253
        free(s->ac_val[0]);
254
    if (s->coded_block)
255
        free(s->coded_block);
256
    if (s->mbintra_table)
257
        free(s->mbintra_table);
258

    
259
    if (s->mbskip_table)
260
        free(s->mbskip_table);
261
    for(i=0;i<3;i++) {
262
        if (s->last_picture_base[i])
263
            free(s->last_picture_base[i]);
264
        if (s->next_picture_base[i])
265
            free(s->next_picture_base[i]);
266
        if (s->has_b_frames)
267
            free(s->aux_picture_base[i]);
268
    }
269
    s->context_initialized = 0;
270
}
271

    
272
/* init video encoder */
273
int MPV_encode_init(AVCodecContext *avctx)
274
{
275
    MpegEncContext *s = avctx->priv_data;
276
    int i;
277

    
278
    s->bit_rate = avctx->bit_rate;
279
    s->bit_rate_tolerance = avctx->bit_rate_tolerance;
280
    s->frame_rate = avctx->frame_rate;
281
    s->width = avctx->width;
282
    s->height = avctx->height;
283
    s->gop_size = avctx->gop_size;
284
    s->rtp_mode = avctx->rtp_mode;
285
    s->rtp_payload_size = avctx->rtp_payload_size;
286
    if (avctx->rtp_callback)
287
        s->rtp_callback = avctx->rtp_callback;
288
    s->qmin= avctx->qmin;
289
    s->qmax= avctx->qmax;
290
    s->max_qdiff= avctx->max_qdiff;
291
    s->qcompress= avctx->qcompress;
292
    s->qblur= avctx->qblur;
293
    s->avctx = avctx;
294
    
295
    if (s->gop_size <= 1) {
296
        s->intra_only = 1;
297
        s->gop_size = 12;
298
    } else {
299
        s->intra_only = 0;
300
    }
301
    s->full_search = motion_estimation_method;
302

    
303
    s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE);
304
    
305
    switch(avctx->codec->id) {
306
    case CODEC_ID_MPEG1VIDEO:
307
        s->out_format = FMT_MPEG1;
308
        break;
309
    case CODEC_ID_MJPEG:
310
        s->out_format = FMT_MJPEG;
311
        s->intra_only = 1; /* force intra only for jpeg */
312
        s->mjpeg_write_tables = 1; /* write all tables */
313
        s->mjpeg_vsample[0] = 2; /* set up default sampling factors */
314
        s->mjpeg_vsample[1] = 1; /* the only currently supported values */
315
        s->mjpeg_vsample[2] = 1; 
316
        s->mjpeg_hsample[0] = 2; 
317
        s->mjpeg_hsample[1] = 1; 
318
        s->mjpeg_hsample[2] = 1; 
319
        if (mjpeg_init(s) < 0)
320
            return -1;
321
        break;
322
    case CODEC_ID_H263:
323
        if (h263_get_picture_format(s->width, s->height) == 7) {
324
            printf("Input picture size isn't suitable for h263 codec! try h263+\n");
325
            return -1;
326
        }
327
        s->out_format = FMT_H263;
328
        break;
329
    case CODEC_ID_H263P:
330
        s->out_format = FMT_H263;
331
        s->rtp_mode = 1;
332
        s->rtp_payload_size = 1200; 
333
        s->h263_plus = 1;
334
        s->unrestricted_mv = 1;
335
        
336
        /* These are just to be sure */
337
        s->umvplus = 0;
338
        s->umvplus_dec = 0;
339
        break;
340
    case CODEC_ID_RV10:
341
        s->out_format = FMT_H263;
342
        s->h263_rv10 = 1;
343
        break;
344
    case CODEC_ID_MPEG4:
345
        s->out_format = FMT_H263;
346
        s->h263_pred = 1;
347
        s->unrestricted_mv = 1;
348
        break;
349
    case CODEC_ID_MSMPEG4:
350
        s->out_format = FMT_H263;
351
        s->h263_msmpeg4 = 1;
352
        s->h263_pred = 1;
353
        s->unrestricted_mv = 1;
354
        break;
355
    default:
356
        return -1;
357
    }
358

    
359
    if (s->out_format == FMT_H263)
360
        h263_encode_init_vlc(s);
361

    
362
    s->encoding = 1;
363

    
364
    /* init */
365
    if (MPV_common_init(s) < 0)
366
        return -1;
367
    
368
    /* init default q matrix */
369
    for(i=0;i<64;i++) {
370
        s->intra_matrix[i] = default_intra_matrix[i];
371
        s->non_intra_matrix[i] = default_non_intra_matrix[i];
372
    }
373

    
374
    /* rate control init */
375
    rate_control_init(s);
376

    
377
    s->picture_number = 0;
378
    s->fake_picture_number = 0;
379
    /* motion detector init */
380
    s->f_code = 1;
381

    
382
    return 0;
383
}
384

    
385
int MPV_encode_end(AVCodecContext *avctx)
386
{
387
    MpegEncContext *s = avctx->priv_data;
388

    
389
#ifdef STATS
390
    print_stats();
391
#endif
392
    MPV_common_end(s);
393
    if (s->out_format == FMT_MJPEG)
394
        mjpeg_close(s);
395
      
396
    return 0;
397
}
398

    
399
/* draw the edges of width 'w' of an image of size width, height */
400
static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w)
401
{
402
    UINT8 *ptr, *last_line;
403
    int i;
404

    
405
    last_line = buf + (height - 1) * wrap;
406
    for(i=0;i<w;i++) {
407
        /* top and bottom */
408
        memcpy(buf - (i + 1) * wrap, buf, width);
409
        memcpy(last_line + (i + 1) * wrap, last_line, width);
410
    }
411
    /* left and right */
412
    ptr = buf;
413
    for(i=0;i<height;i++) {
414
        memset(ptr - w, ptr[0], w);
415
        memset(ptr + width, ptr[width-1], w);
416
        ptr += wrap;
417
    }
418
    /* corners */
419
    for(i=0;i<w;i++) {
420
        memset(buf - (i + 1) * wrap - w, buf[0], w); /* top left */
421
        memset(buf - (i + 1) * wrap + width, buf[width-1], w); /* top right */
422
        memset(last_line + (i + 1) * wrap - w, last_line[0], w); /* top left */
423
        memset(last_line + (i + 1) * wrap + width, last_line[width-1], w); /* top right */
424
    }
425
}
426

    
427
/* generic function for encode/decode called before a frame is coded/decoded */
428
void MPV_frame_start(MpegEncContext *s)
429
{
430
    int i;
431
    UINT8 *tmp;
432

    
433
    s->mb_skiped = 0;
434
    if (s->pict_type == B_TYPE) {
435
        for(i=0;i<3;i++) {
436
            s->current_picture[i] = s->aux_picture[i];
437
        }
438
    } else {
439
        s->last_non_b_pict_type= s->pict_type;
440
        for(i=0;i<3;i++) {
441
            /* swap next and last */
442
            tmp = s->last_picture[i];
443
            s->last_picture[i] = s->next_picture[i];
444
            s->next_picture[i] = tmp;
445
            s->current_picture[i] = tmp;
446
        }
447
    }
448
}
449

    
450
/* generic function for encode/decode called after a frame has been coded/decoded */
451
void MPV_frame_end(MpegEncContext *s)
452
{
453
    /* draw edge for correct motion prediction if outside */
454
    if (s->pict_type != B_TYPE && !s->intra_only) {
455
      if(s->avctx==NULL || s->avctx->codec->id!=CODEC_ID_MPEG4 || s->divx_version==500){
456
        draw_edges(s->current_picture[0], s->linesize, s->mb_width*16, s->mb_height*16, EDGE_WIDTH);
457
        draw_edges(s->current_picture[1], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
458
        draw_edges(s->current_picture[2], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
459
      }else{
460
        /* mpeg4? / opendivx / xvid */
461
        draw_edges(s->current_picture[0], s->linesize, s->width, s->height, EDGE_WIDTH);
462
        draw_edges(s->current_picture[1], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
463
        draw_edges(s->current_picture[2], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
464
      }
465
    }
466
    emms_c();
467
}
468

    
469
int MPV_encode_picture(AVCodecContext *avctx,
470
                       unsigned char *buf, int buf_size, void *data)
471
{
472
    MpegEncContext *s = avctx->priv_data;
473
    AVPicture *pict = data;
474
    int i, j;
475

    
476
    if (s->fixed_qscale) 
477
        s->qscale = avctx->quality;
478

    
479
    init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
480

    
481
    if (!s->intra_only) {
482
        /* first picture of GOP is intra */
483
        if ((s->picture_number % s->gop_size) == 0)
484
            s->pict_type = I_TYPE;
485
        else
486
            s->pict_type = P_TYPE;
487
    } else {
488
        s->pict_type = I_TYPE;
489
    }
490
    
491
    MPV_frame_start(s);
492
    
493
    for(i=0;i<3;i++) {
494
        UINT8 *src = pict->data[i];
495
        UINT8 *dest = s->current_picture[i];
496
        int src_wrap = pict->linesize[i];
497
        int dest_wrap = s->linesize;
498
        int w = s->width;
499
        int h = s->height;
500

    
501
        if (i >= 1) {
502
            dest_wrap >>= 1;
503
            w >>= 1;
504
            h >>= 1;
505
        }
506

    
507
        if(dest_wrap==src_wrap){
508
            s->new_picture[i] = pict->data[i];
509
        } else {
510
            for(j=0;j<h;j++) {
511
                memcpy(dest, src, w);
512
                dest += dest_wrap;
513
                src += src_wrap;
514
            }
515
            s->new_picture[i] = s->current_picture[i];
516
            }
517
    }
518

    
519
    encode_picture(s, s->picture_number);
520
    avctx->key_frame = (s->pict_type == I_TYPE);
521
    
522
    MPV_frame_end(s);
523
    s->picture_number++;
524

    
525
    if (s->out_format == FMT_MJPEG)
526
        mjpeg_picture_trailer(s);
527

    
528
    flush_put_bits(&s->pb);
529
    s->last_frame_bits= s->frame_bits;
530
    s->frame_bits  = (pbBufPtr(&s->pb) - s->pb.buf) * 8;
531
    s->total_bits += s->frame_bits;
532

    
533
    avctx->quality = s->qscale;
534
    if (avctx->get_psnr) {
535
        /* At this point pict->data should have the original frame   */
536
        /* an s->current_picture should have the coded/decoded frame */
537
        get_psnr(pict->data, s->current_picture,
538
                 pict->linesize, s->linesize, avctx);
539
    }
540
    return pbBufPtr(&s->pb) - s->pb.buf;
541
}
542

    
543
static inline int clip(int a, int amin, int amax)
544
{
545
    if (a < amin)
546
        return amin;
547
    else if (a > amax)
548
        return amax;
549
    else
550
        return a;
551
}
552

    
553
static inline void gmc1_motion(MpegEncContext *s,
554
                               UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
555
                               int dest_offset,
556
                               UINT8 **ref_picture, int src_offset,
557
                               int h)
558
{
559
    UINT8 *ptr;
560
    int dxy, offset, mx, my, src_x, src_y, height, linesize;
561
    int motion_x, motion_y;
562

    
563
    if(s->real_sprite_warping_points>1) printf("more than 1 warp point isnt supported\n");
564
    motion_x= s->sprite_offset[0][0];
565
    motion_y= s->sprite_offset[0][1];
566
    src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy+1));
567
    src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy+1));
568
    motion_x<<=(3-s->sprite_warping_accuracy);
569
    motion_y<<=(3-s->sprite_warping_accuracy);
570
    src_x = clip(src_x, -16, s->width);
571
    if (src_x == s->width)
572
        motion_x =0;
573
    src_y = clip(src_y, -16, s->height);
574
    if (src_y == s->height)
575
        motion_y =0;
576
    
577
    linesize = s->linesize;
578
    ptr = ref_picture[0] + (src_y * linesize) + src_x + src_offset;
579

    
580
    dest_y+=dest_offset;
581
    gmc1(dest_y  , ptr  , linesize, h, motion_x&15, motion_y&15, s->no_rounding);
582
    gmc1(dest_y+8, ptr+8, linesize, h, motion_x&15, motion_y&15, s->no_rounding);
583

    
584
    motion_x= s->sprite_offset[1][0];
585
    motion_y= s->sprite_offset[1][1];
586
    src_x = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy+1));
587
    src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy+1));
588
    motion_x<<=(3-s->sprite_warping_accuracy);
589
    motion_y<<=(3-s->sprite_warping_accuracy);
590
    src_x = clip(src_x, -8, s->width>>1);
591
    if (src_x == s->width>>1)
592
        motion_x =0;
593
    src_y = clip(src_y, -8, s->height>>1);
594
    if (src_y == s->height>>1)
595
        motion_y =0;
596

    
597
    offset = (src_y * linesize>>1) + src_x + (src_offset>>1);
598
    ptr = ref_picture[1] + offset;
599
    gmc1(dest_cb + (dest_offset>>1), ptr, linesize>>1, h>>1, motion_x&15, motion_y&15, s->no_rounding);
600
    ptr = ref_picture[2] + offset;
601
    gmc1(dest_cr + (dest_offset>>1), ptr, linesize>>1, h>>1, motion_x&15, motion_y&15, s->no_rounding);
602
    
603
    return;
604
}
605

    
606
/* apply one mpeg motion vector to the three components */
607
static inline void mpeg_motion(MpegEncContext *s,
608
                               UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
609
                               int dest_offset,
610
                               UINT8 **ref_picture, int src_offset,
611
                               int field_based, op_pixels_func *pix_op,
612
                               int motion_x, int motion_y, int h)
613
{
614
    UINT8 *ptr;
615
    int dxy, offset, mx, my, src_x, src_y, height, linesize;
616
if(s->quarter_sample)
617
{
618
    motion_x>>=1;
619
    motion_y>>=1;
620
}
621
    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
622
    src_x = s->mb_x * 16 + (motion_x >> 1);
623
    src_y = s->mb_y * (16 >> field_based) + (motion_y >> 1);
624
                
625
    /* WARNING: do no forget half pels */
626
    height = s->height >> field_based;
627
    src_x = clip(src_x, -16, s->width);
628
    if (src_x == s->width)
629
        dxy &= ~1;
630
    src_y = clip(src_y, -16, height);
631
    if (src_y == height)
632
        dxy &= ~2;
633
    linesize = s->linesize << field_based;
634
    ptr = ref_picture[0] + (src_y * linesize) + (src_x) + src_offset;
635
    dest_y += dest_offset;
636
    pix_op[dxy](dest_y, ptr, linesize, h);
637
    pix_op[dxy](dest_y + 8, ptr + 8, linesize, h);
638

    
639
    if (s->out_format == FMT_H263) {
640
        dxy = 0;
641
        if ((motion_x & 3) != 0)
642
            dxy |= 1;
643
        if ((motion_y & 3) != 0)
644
            dxy |= 2;
645
        mx = motion_x >> 2;
646
        my = motion_y >> 2;
647
    } else {
648
        mx = motion_x / 2;
649
        my = motion_y / 2;
650
        dxy = ((my & 1) << 1) | (mx & 1);
651
        mx >>= 1;
652
        my >>= 1;
653
    }
654
    
655
    src_x = s->mb_x * 8 + mx;
656
    src_y = s->mb_y * (8 >> field_based) + my;
657
    src_x = clip(src_x, -8, s->width >> 1);
658
    if (src_x == (s->width >> 1))
659
        dxy &= ~1;
660
    src_y = clip(src_y, -8, height >> 1);
661
    if (src_y == (height >> 1))
662
        dxy &= ~2;
663

    
664
    offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
665
    ptr = ref_picture[1] + offset;
666
    pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
667
    ptr = ref_picture[2] + offset;
668
    pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
669
}
670

    
671
static inline void qpel_motion(MpegEncContext *s,
672
                               UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
673
                               int dest_offset,
674
                               UINT8 **ref_picture, int src_offset,
675
                               int field_based, op_pixels_func *pix_op,
676
                               qpel_mc_func *qpix_op,
677
                               int motion_x, int motion_y, int h)
678
{
679
    UINT8 *ptr;
680
    int dxy, offset, mx, my, src_x, src_y, height, linesize;
681

    
682
    dxy = ((motion_y & 3) << 2) | (motion_x & 3);
683
    src_x = s->mb_x * 16 + (motion_x >> 2);
684
    src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);
685

    
686
    height = s->height >> field_based;
687
    src_x = clip(src_x, -16, s->width);
688
    if (src_x == s->width)
689
        dxy &= ~3;
690
    src_y = clip(src_y, -16, height);
691
    if (src_y == height)
692
        dxy &= ~12;
693
    linesize = s->linesize << field_based;
694
    ptr = ref_picture[0] + (src_y * linesize) + src_x + src_offset;
695
    dest_y += dest_offset;
696
//printf("%d %d %d\n", src_x, src_y, dxy);
697
    qpix_op[dxy](dest_y                 , ptr                 , linesize, linesize, motion_x&3, motion_y&3);
698
    qpix_op[dxy](dest_y              + 8, ptr              + 8, linesize, linesize, motion_x&3, motion_y&3);
699
    qpix_op[dxy](dest_y + linesize*8    , ptr + linesize*8    , linesize, linesize, motion_x&3, motion_y&3);
700
    qpix_op[dxy](dest_y + linesize*8 + 8, ptr + linesize*8 + 8, linesize, linesize, motion_x&3, motion_y&3);
701
    
702
    mx= (motion_x>>1) | (motion_x&1);
703
    my= (motion_y>>1) | (motion_y&1);
704

    
705
    dxy = 0;
706
    if ((mx & 3) != 0)
707
        dxy |= 1;
708
    if ((my & 3) != 0)
709
        dxy |= 2;
710
    mx = mx >> 2;
711
    my = my >> 2;
712
    
713
    src_x = s->mb_x * 8 + mx;
714
    src_y = s->mb_y * (8 >> field_based) + my;
715
    src_x = clip(src_x, -8, s->width >> 1);
716
    if (src_x == (s->width >> 1))
717
        dxy &= ~1;
718
    src_y = clip(src_y, -8, height >> 1);
719
    if (src_y == (height >> 1))
720
        dxy &= ~2;
721

    
722
    offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
723
    ptr = ref_picture[1] + offset;
724
    pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
725
    ptr = ref_picture[2] + offset;
726
    pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
727
}
728

    
729

    
730
static inline void MPV_motion(MpegEncContext *s, 
731
                              UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
732
                              int dir, UINT8 **ref_picture, 
733
                              op_pixels_func *pix_op, qpel_mc_func *qpix_op)
734
{
735
    int dxy, offset, mx, my, src_x, src_y, motion_x, motion_y;
736
    int mb_x, mb_y, i;
737
    UINT8 *ptr, *dest;
738

    
739
    mb_x = s->mb_x;
740
    mb_y = s->mb_y;
741

    
742
    switch(s->mv_type) {
743
    case MV_TYPE_16X16:
744
        if(s->mcsel){
745
#if 0
746
            mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
747
                        ref_picture, 0,
748
                        0, pix_op,
749
                        s->sprite_offset[0][0]>>3,
750
                        s->sprite_offset[0][1]>>3,
751
                        16);
752
#else
753
            gmc1_motion(s, dest_y, dest_cb, dest_cr, 0,
754
                        ref_picture, 0,
755
                        16);
756
#endif
757
        }else if(s->quarter_sample && dir==0){ //FIXME
758
            qpel_motion(s, dest_y, dest_cb, dest_cr, 0,
759
                        ref_picture, 0,
760
                        0, pix_op, qpix_op,
761
                        s->mv[dir][0][0], s->mv[dir][0][1], 16);
762
        }else{
763
            mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
764
                        ref_picture, 0,
765
                        0, pix_op,
766
                        s->mv[dir][0][0], s->mv[dir][0][1], 16);
767
        }           
768
        break;
769
    case MV_TYPE_8X8:
770
        for(i=0;i<4;i++) {
771
            motion_x = s->mv[dir][i][0];
772
            motion_y = s->mv[dir][i][1];
773

    
774
            dxy = ((motion_y & 1) << 1) | (motion_x & 1);
775
            src_x = mb_x * 16 + (motion_x >> 1) + (i & 1) * 8;
776
            src_y = mb_y * 16 + (motion_y >> 1) + ((i >> 1) & 1) * 8;
777
                    
778
            /* WARNING: do no forget half pels */
779
            src_x = clip(src_x, -16, s->width);
780
            if (src_x == s->width)
781
                dxy &= ~1;
782
            src_y = clip(src_y, -16, s->height);
783
            if (src_y == s->height)
784
                dxy &= ~2;
785
                    
786
            ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
787
            dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
788
            pix_op[dxy](dest, ptr, s->linesize, 8);
789
        }
790
        /* In case of 8X8, we construct a single chroma motion vector
791
           with a special rounding */
792
        mx = 0;
793
        my = 0;
794
        for(i=0;i<4;i++) {
795
            mx += s->mv[dir][i][0];
796
            my += s->mv[dir][i][1];
797
        }
798
        if (mx >= 0)
799
            mx = (h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
800
        else {
801
            mx = -mx;
802
            mx = -(h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
803
        }
804
        if (my >= 0)
805
            my = (h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
806
        else {
807
            my = -my;
808
            my = -(h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
809
        }
810
        dxy = ((my & 1) << 1) | (mx & 1);
811
        mx >>= 1;
812
        my >>= 1;
813

    
814
        src_x = mb_x * 8 + mx;
815
        src_y = mb_y * 8 + my;
816
        src_x = clip(src_x, -8, s->width/2);
817
        if (src_x == s->width/2)
818
            dxy &= ~1;
819
        src_y = clip(src_y, -8, s->height/2);
820
        if (src_y == s->height/2)
821
            dxy &= ~2;
822
        
823
        offset = (src_y * (s->linesize >> 1)) + src_x;
824
        ptr = ref_picture[1] + offset;
825
        pix_op[dxy](dest_cb, ptr, s->linesize >> 1, 8);
826
        ptr = ref_picture[2] + offset;
827
        pix_op[dxy](dest_cr, ptr, s->linesize >> 1, 8);
828
        break;
829
    case MV_TYPE_FIELD:
830
        if (s->picture_structure == PICT_FRAME) {
831
            /* top field */
832
            mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
833
                        ref_picture, s->field_select[dir][0] ? s->linesize : 0,
834
                        1, pix_op,
835
                        s->mv[dir][0][0], s->mv[dir][0][1], 8);
836
            /* bottom field */
837
            mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
838
                        ref_picture, s->field_select[dir][1] ? s->linesize : 0,
839
                        1, pix_op,
840
                        s->mv[dir][1][0], s->mv[dir][1][1], 8);
841
        } else {
842
            
843

    
844
        }
845
        break;
846
    }
847
}
848

    
849

    
850
/* put block[] to dest[] */
851
static inline void put_dct(MpegEncContext *s, 
852
                           DCTELEM *block, int i, UINT8 *dest, int line_size)
853
{
854
    if (!s->mpeg2)
855
        s->dct_unquantize(s, block, i, s->qscale);
856
    ff_idct (block);
857
    put_pixels_clamped(block, dest, line_size);
858
}
859

    
860
/* add block[] to dest[] */
861
static inline void add_dct(MpegEncContext *s, 
862
                           DCTELEM *block, int i, UINT8 *dest, int line_size)
863
{
864
    if (s->block_last_index[i] >= 0) {
865
        if (!s->mpeg2)
866
            if(s->encoding || (!s->h263_msmpeg4))
867
                s->dct_unquantize(s, block, i, s->qscale);
868
        ff_idct (block);
869
        add_pixels_clamped(block, dest, line_size);
870
    }
871
}
872

    
873
/* generic function called after a macroblock has been parsed by the
874
   decoder or after it has been encoded by the encoder.
875

876
   Important variables used:
877
   s->mb_intra : true if intra macroblock
878
   s->mv_dir   : motion vector direction
879
   s->mv_type  : motion vector type
880
   s->mv       : motion vector
881
   s->interlaced_dct : true if interlaced dct used (mpeg2)
882
 */
883
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
884
{
885
    int mb_x, mb_y;
886
    int dct_linesize, dct_offset;
887
    op_pixels_func *op_pix;
888
    qpel_mc_func *op_qpix;
889

    
890
    mb_x = s->mb_x;
891
    mb_y = s->mb_y;
892

    
893
#ifdef FF_POSTPROCESS
894
    quant_store[mb_y][mb_x]=s->qscale;
895
    //printf("[%02d][%02d] %d\n",mb_x,mb_y,s->qscale);
896
#endif
897

    
898
    /* update DC predictors for P macroblocks */
899
    if (!s->mb_intra) {
900
        if (s->h263_pred || s->h263_aic) {
901
          if(s->mbintra_table[mb_x + mb_y*s->mb_width])
902
          {
903
            int wrap, xy, v;
904
            s->mbintra_table[mb_x + mb_y*s->mb_width]=0;
905
            wrap = 2 * s->mb_width + 2;
906
            xy = 2 * mb_x + 1 +  (2 * mb_y + 1) * wrap;
907
            v = 1024;
908
            
909
            s->dc_val[0][xy] = v;
910
            s->dc_val[0][xy + 1] = v;
911
            s->dc_val[0][xy + wrap] = v;
912
            s->dc_val[0][xy + 1 + wrap] = v;
913
            /* ac pred */
914
            memset(s->ac_val[0][xy], 0, 16 * sizeof(INT16));
915
            memset(s->ac_val[0][xy + 1], 0, 16 * sizeof(INT16));
916
            memset(s->ac_val[0][xy + wrap], 0, 16 * sizeof(INT16));
917
            memset(s->ac_val[0][xy + 1 + wrap], 0, 16 * sizeof(INT16));
918
            if (s->h263_msmpeg4) {
919
                s->coded_block[xy] = 0;
920
                s->coded_block[xy + 1] = 0;
921
                s->coded_block[xy + wrap] = 0;
922
                s->coded_block[xy + 1 + wrap] = 0;
923
            }
924
            /* chroma */
925
            wrap = s->mb_width + 2;
926
            xy = mb_x + 1 + (mb_y + 1) * wrap;
927
            s->dc_val[1][xy] = v;
928
            s->dc_val[2][xy] = v;
929
            /* ac pred */
930
            memset(s->ac_val[1][xy], 0, 16 * sizeof(INT16));
931
            memset(s->ac_val[2][xy], 0, 16 * sizeof(INT16));
932
          }
933
        } else {
934
            s->last_dc[0] = 128 << s->intra_dc_precision;
935
            s->last_dc[1] = 128 << s->intra_dc_precision;
936
            s->last_dc[2] = 128 << s->intra_dc_precision;
937
        }
938
    }
939
    else if (s->h263_pred || s->h263_aic)
940
        s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
941

    
942
    /* update motion predictor, not for B-frames as they need the motion_val from the last P/S-Frame */
943
    if (s->out_format == FMT_H263) {
944
      if(s->pict_type!=B_TYPE){
945
        int xy, wrap, motion_x, motion_y;
946
        
947
        wrap = 2 * s->mb_width + 2;
948
        xy = 2 * mb_x + 1 + (2 * mb_y + 1) * wrap;
949
        if (s->mb_intra) {
950
            motion_x = 0;
951
            motion_y = 0;
952
            goto motion_init;
953
        } else if (s->mv_type == MV_TYPE_16X16) {
954
            motion_x = s->mv[0][0][0];
955
            motion_y = s->mv[0][0][1];
956
        motion_init:
957
            /* no update if 8X8 because it has been done during parsing */
958
            s->motion_val[xy][0] = motion_x;
959
            s->motion_val[xy][1] = motion_y;
960
            s->motion_val[xy + 1][0] = motion_x;
961
            s->motion_val[xy + 1][1] = motion_y;
962
            s->motion_val[xy + wrap][0] = motion_x;
963
            s->motion_val[xy + wrap][1] = motion_y;
964
            s->motion_val[xy + 1 + wrap][0] = motion_x;
965
            s->motion_val[xy + 1 + wrap][1] = motion_y;
966
        }
967
      }
968
    }
969
    
970
    if (!s->intra_only) {
971
        UINT8 *dest_y, *dest_cb, *dest_cr;
972
        UINT8 *mbskip_ptr;
973

    
974
        /* avoid copy if macroblock skipped in last frame too */
975
        if (!s->encoding && s->pict_type != B_TYPE) {
976
            mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x];
977
            if (s->mb_skiped) {
978
                s->mb_skiped = 0;
979
                /* if previous was skipped too, then nothing to do ! */
980
                if (*mbskip_ptr != 0) 
981
                    goto the_end;
982
                *mbskip_ptr = 1; /* indicate that this time we skiped it */
983
            } else {
984
                *mbskip_ptr = 0; /* not skipped */
985
            }
986
        }
987

    
988
        dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16;
989
        dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
990
        dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
991

    
992
        if (s->interlaced_dct) {
993
            dct_linesize = s->linesize * 2;
994
            dct_offset = s->linesize;
995
        } else {
996
            dct_linesize = s->linesize;
997
            dct_offset = s->linesize * 8;
998
        }
999

    
1000
        if (!s->mb_intra) {
1001
            /* motion handling */
1002
            if (!s->no_rounding){
1003
                op_pix = put_pixels_tab;
1004
                op_qpix= qpel_mc_rnd_tab;
1005
            }else{
1006
                op_pix = put_no_rnd_pixels_tab;
1007
                op_qpix= qpel_mc_no_rnd_tab;
1008
            }
1009

    
1010
            if (s->mv_dir & MV_DIR_FORWARD) {
1011
                MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix, op_qpix);
1012
                if (!s->no_rounding) 
1013
                    op_pix = avg_pixels_tab;
1014
                else
1015
                    op_pix = avg_no_rnd_pixels_tab;
1016
            }
1017
            if (s->mv_dir & MV_DIR_BACKWARD) {
1018
                MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix, op_qpix);
1019
            }
1020

    
1021
            /* add dct residue */
1022
            add_dct(s, block[0], 0, dest_y, dct_linesize);
1023
            add_dct(s, block[1], 1, dest_y + 8, dct_linesize);
1024
            add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
1025
            add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
1026

    
1027
            add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
1028
            add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
1029
        } else {
1030
            /* dct only in intra block */
1031
            put_dct(s, block[0], 0, dest_y, dct_linesize);
1032
            put_dct(s, block[1], 1, dest_y + 8, dct_linesize);
1033
            put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
1034
            put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
1035

    
1036
            put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
1037
            put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
1038
        }
1039
    }
1040
 the_end:
1041
    emms_c();
1042
}
1043

    
1044
static void encode_picture(MpegEncContext *s, int picture_number)
1045
{
1046
    int mb_x, mb_y, wrap, last_gob, pdif = 0;
1047
    UINT8 *ptr;
1048
    int i, motion_x, motion_y;
1049

    
1050
    s->picture_number = picture_number;
1051

    
1052
    s->last_mc_mb_var = s->mc_mb_var;
1053
    /* Reset the average MB variance */
1054
    s->avg_mb_var = 0;
1055
    s->mc_mb_var = 0;
1056

    
1057
    /* Estimate motion for every MB */
1058
    for(mb_y=0; mb_y < s->mb_height; mb_y++) {
1059
        for(mb_x=0; mb_x < s->mb_width; mb_x++) {
1060
            int xy= mb_y * s->mb_width + mb_x;
1061
            s->mb_x = mb_x;
1062
            s->mb_y = mb_y;
1063

    
1064
            /* compute motion vector and macro block type (intra or non intra) */
1065
            motion_x = 0;
1066
            motion_y = 0;
1067
            if (s->pict_type == P_TYPE) {
1068
                s->mb_intra = estimate_motion(s, mb_x, mb_y,
1069
                                              &motion_x,
1070
                                              &motion_y);
1071
            } else {
1072
                s->mb_intra = 1;
1073
            }
1074
            /* Store MB type and MV */
1075
            s->mb_type[xy] = s->mb_intra;
1076
            s->mv_table[0][xy] = motion_x;
1077
            s->mv_table[1][xy] = motion_y;
1078
        }
1079
    }
1080

    
1081
    if(s->avg_mb_var < s->mc_mb_var && s->pict_type != B_TYPE){ //FIXME subtract MV bits
1082
        int i;
1083
        s->pict_type= I_TYPE;
1084
        for(i=0; i<s->mb_height*s->mb_width; i++){
1085
            s->mb_type[i] = I_TYPE;
1086
            s->mv_table[0][i] = 0;
1087
            s->mv_table[1][i] = 0;
1088
        }
1089
    }
1090
        
1091
//    printf("%d %d\n", s->avg_mb_var, s->mc_mb_var);
1092

    
1093
    if (!s->fixed_qscale) 
1094
        s->qscale = rate_estimate_qscale(s);
1095

    
1096
    /* precompute matrix */
1097
    if (s->out_format == FMT_MJPEG) {
1098
        /* for mjpeg, we do include qscale in the matrix */
1099
        s->intra_matrix[0] = default_intra_matrix[0];
1100
        for(i=1;i<64;i++)
1101
            s->intra_matrix[i] = (default_intra_matrix[i] * s->qscale) >> 3;
1102
        convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, 8);
1103
    } else {
1104
        convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, s->qscale);
1105
        convert_matrix(s->q_non_intra_matrix, s->q_non_intra_matrix16, s->non_intra_matrix, s->qscale);
1106
    }
1107

    
1108
    switch(s->out_format) {
1109
    case FMT_MJPEG:
1110
        mjpeg_picture_header(s);
1111
        break;
1112
    case FMT_H263:
1113
        if (s->h263_msmpeg4) 
1114
            msmpeg4_encode_picture_header(s, picture_number);
1115
        else if (s->h263_pred)
1116
            mpeg4_encode_picture_header(s, picture_number);
1117
        else if (s->h263_rv10) 
1118
            rv10_encode_picture_header(s, picture_number);
1119
        else
1120
            h263_encode_picture_header(s, picture_number);
1121
        break;
1122
    case FMT_MPEG1:
1123
        mpeg1_encode_picture_header(s, picture_number);
1124
        break;
1125
    }
1126
        
1127
    /* init last dc values */
1128
    /* note: quant matrix value (8) is implied here */
1129
    s->last_dc[0] = 128;
1130
    s->last_dc[1] = 128;
1131
    s->last_dc[2] = 128;
1132
    s->mb_incr = 1;
1133
    s->last_mv[0][0][0] = 0;
1134
    s->last_mv[0][0][1] = 0;
1135
    s->mv_type = MV_TYPE_16X16;
1136
    s->mv_dir = MV_DIR_FORWARD;
1137

    
1138
    /* Get the GOB height based on picture height */
1139
    if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4) {
1140
        if (s->height <= 400)
1141
            s->gob_index = 1;
1142
        else if (s->height <= 800)
1143
            s->gob_index = 2;
1144
        else
1145
            s->gob_index = 4;
1146
    }
1147
        
1148
    s->avg_mb_var = s->avg_mb_var / s->mb_num;        
1149
    
1150
    s->block_wrap[0]=
1151
    s->block_wrap[1]=
1152
    s->block_wrap[2]=
1153
    s->block_wrap[3]= s->mb_width*2 + 2;
1154
    s->block_wrap[4]=
1155
    s->block_wrap[5]= s->mb_width + 2;
1156
    for(mb_y=0; mb_y < s->mb_height; mb_y++) {
1157
        /* Put GOB header based on RTP MTU */
1158
        /* TODO: Put all this stuff in a separate generic function */
1159
        if (s->rtp_mode) {
1160
            if (!mb_y) {
1161
                s->ptr_lastgob = s->pb.buf;
1162
                s->ptr_last_mb_line = s->pb.buf;
1163
            } else if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4 && !(mb_y % s->gob_index)) {
1164
                last_gob = h263_encode_gob_header(s, mb_y);
1165
                if (last_gob) {
1166
                    s->first_gob_line = 1;
1167
                }
1168
            }
1169
        }
1170
        
1171
        s->block_index[0]= s->block_wrap[0]*(mb_y*2 + 1) - 1;
1172
        s->block_index[1]= s->block_wrap[0]*(mb_y*2 + 1);
1173
        s->block_index[2]= s->block_wrap[0]*(mb_y*2 + 2) - 1;
1174
        s->block_index[3]= s->block_wrap[0]*(mb_y*2 + 2);
1175
        s->block_index[4]= s->block_wrap[4]*(mb_y + 1)                    + s->block_wrap[0]*(s->mb_height*2 + 2);
1176
        s->block_index[5]= s->block_wrap[4]*(mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
1177
        for(mb_x=0; mb_x < s->mb_width; mb_x++) {
1178

    
1179
            s->mb_x = mb_x;
1180
            s->mb_y = mb_y;
1181
            s->block_index[0]+=2;
1182
            s->block_index[1]+=2;
1183
            s->block_index[2]+=2;
1184
            s->block_index[3]+=2;
1185
            s->block_index[4]++;
1186
            s->block_index[5]++;
1187
#if 0
1188
            /* compute motion vector and macro block type (intra or non intra) */
1189
            motion_x = 0;
1190
            motion_y = 0;
1191
            if (s->pict_type == P_TYPE) {
1192
                s->mb_intra = estimate_motion(s, mb_x, mb_y,
1193
                                              &motion_x,
1194
                                              &motion_y);
1195
            } else {
1196
                s->mb_intra = 1;
1197
            }
1198
#endif
1199

    
1200
            s->mb_intra = s->mb_type[mb_y * s->mb_width + mb_x];
1201
            motion_x = s->mv_table[0][mb_y * s->mb_width + mb_x];
1202
            motion_y = s->mv_table[1][mb_y * s->mb_width + mb_x];
1203
            
1204
            /* get the pixels */
1205
            wrap = s->linesize;
1206
            ptr = s->new_picture[0] + (mb_y * 16 * wrap) + mb_x * 16;
1207
            get_pixels(s->block[0], ptr, wrap);
1208
            get_pixels(s->block[1], ptr + 8, wrap);
1209
            get_pixels(s->block[2], ptr + 8 * wrap, wrap);
1210
            get_pixels(s->block[3], ptr + 8 * wrap + 8, wrap);
1211
            wrap = s->linesize >> 1;
1212
            ptr = s->new_picture[1] + (mb_y * 8 * wrap) + mb_x * 8;
1213
            get_pixels(s->block[4], ptr, wrap);
1214

    
1215
            wrap = s->linesize >> 1;
1216
            ptr = s->new_picture[2] + (mb_y * 8 * wrap) + mb_x * 8;
1217
            get_pixels(s->block[5], ptr, wrap);
1218

    
1219
            /* subtract previous frame if non intra */
1220
            if (!s->mb_intra) {
1221
                int dxy, offset, mx, my;
1222

    
1223
                dxy = ((motion_y & 1) << 1) | (motion_x & 1);
1224
                ptr = s->last_picture[0] + 
1225
                    ((mb_y * 16 + (motion_y >> 1)) * s->linesize) + 
1226
                    (mb_x * 16 + (motion_x >> 1));
1227

    
1228
                sub_pixels_2(s->block[0], ptr, s->linesize, dxy);
1229
                sub_pixels_2(s->block[1], ptr + 8, s->linesize, dxy);
1230
                sub_pixels_2(s->block[2], ptr + s->linesize * 8, s->linesize, dxy);
1231
                sub_pixels_2(s->block[3], ptr + 8 + s->linesize * 8, s->linesize ,dxy);
1232

    
1233
                if (s->out_format == FMT_H263) {
1234
                    /* special rounding for h263 */
1235
                    dxy = 0;
1236
                    if ((motion_x & 3) != 0)
1237
                        dxy |= 1;
1238
                    if ((motion_y & 3) != 0)
1239
                        dxy |= 2;
1240
                    mx = motion_x >> 2;
1241
                    my = motion_y >> 2;
1242
                } else {
1243
                    mx = motion_x / 2;
1244
                    my = motion_y / 2;
1245
                    dxy = ((my & 1) << 1) | (mx & 1);
1246
                    mx >>= 1;
1247
                    my >>= 1;
1248
                }
1249
                offset = ((mb_y * 8 + my) * (s->linesize >> 1)) + (mb_x * 8 + mx);
1250
                ptr = s->last_picture[1] + offset;
1251
                sub_pixels_2(s->block[4], ptr, s->linesize >> 1, dxy);
1252
                ptr = s->last_picture[2] + offset;
1253
                sub_pixels_2(s->block[5], ptr, s->linesize >> 1, dxy);
1254
            }
1255
            emms_c();
1256
            
1257
#if 0
1258
            {
1259
                float adap_parm;
1260
                
1261
                adap_parm = ((s->avg_mb_var << 1) + s->mb_var[s->mb_width*mb_y+mb_x] + 1.0) /
1262
                            ((s->mb_var[s->mb_width*mb_y+mb_x] << 1) + s->avg_mb_var + 1.0);
1263
            
1264
                printf("\ntype=%c qscale=%2d adap=%0.2f dquant=%4.2f var=%4d avgvar=%4d", 
1265
                        (s->mb_type[s->mb_width*mb_y+mb_x] > 0) ? 'I' : 'P', 
1266
                        s->qscale, adap_parm, s->qscale*adap_parm,
1267
                        s->mb_var[s->mb_width*mb_y+mb_x], s->avg_mb_var);
1268
            }
1269
#endif
1270
            /* DCT & quantize */
1271
            if (s->h263_msmpeg4) {
1272
                msmpeg4_dc_scale(s);
1273
            } else if (s->h263_pred) {
1274
                h263_dc_scale(s);
1275
            } else {
1276
                /* default quantization values */
1277
                s->y_dc_scale = 8;
1278
                s->c_dc_scale = 8;
1279
            }
1280
            for(i=0;i<6;i++) {
1281
                s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale);
1282
            }
1283

    
1284
            /* huffman encode */
1285
            switch(s->out_format) {
1286
            case FMT_MPEG1:
1287
                mpeg1_encode_mb(s, s->block, motion_x, motion_y);
1288
                break;
1289
            case FMT_H263:
1290
                if (s->h263_msmpeg4)
1291
                    msmpeg4_encode_mb(s, s->block, motion_x, motion_y);
1292
                else if(s->h263_pred)
1293
                    mpeg4_encode_mb(s, s->block, motion_x, motion_y);
1294
                else
1295
                    h263_encode_mb(s, s->block, motion_x, motion_y);
1296
                break;
1297
            case FMT_MJPEG:
1298
                mjpeg_encode_mb(s, s->block);
1299
                break;
1300
            }
1301

    
1302
            /* decompress blocks so that we keep the state of the decoder */
1303
            s->mv[0][0][0] = motion_x;
1304
            s->mv[0][0][1] = motion_y;
1305

    
1306
            MPV_decode_mb(s, s->block);
1307
        }
1308

    
1309

    
1310
        /* Obtain average GOB size for RTP */
1311
        if (s->rtp_mode) {
1312
            if (!mb_y)
1313
                s->mb_line_avgsize = pbBufPtr(&s->pb) - s->ptr_last_mb_line;
1314
            else if (!(mb_y % s->gob_index)) {    
1315
                s->mb_line_avgsize = (s->mb_line_avgsize + pbBufPtr(&s->pb) - s->ptr_last_mb_line) >> 1;
1316
                s->ptr_last_mb_line = pbBufPtr(&s->pb);
1317
            }
1318
            //fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y, 
1319
            //                    (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
1320
            s->first_gob_line = 0;
1321
        }
1322
    }
1323
    
1324
    if (s->h263_msmpeg4 && s->pict_type == I_TYPE)
1325
        msmpeg4_encode_ext_header(s);
1326

    
1327
    //if (s->gob_number)
1328
    //    fprintf(stderr,"\nNumber of GOB: %d", s->gob_number);
1329
    
1330
    /* Send the last GOB if RTP */    
1331
    if (s->rtp_mode) {
1332
        flush_put_bits(&s->pb);
1333
        pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
1334
        /* Call the RTP callback to send the last GOB */
1335
        if (s->rtp_callback)
1336
            s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
1337
        s->ptr_lastgob = pbBufPtr(&s->pb);
1338
        //fprintf(stderr,"\nGOB: %2d size: %d (last)", s->gob_number, pdif);
1339
    }
1340

    
1341
}
1342

    
1343
static int dct_quantize_c(MpegEncContext *s, 
1344
                        DCTELEM *block, int n,
1345
                        int qscale)
1346
{
1347
    int i, j, level, last_non_zero, q;
1348
    const int *qmat;
1349
    int minLevel, maxLevel;
1350

    
1351
    if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){
1352
        /* mpeg4 */
1353
        minLevel= -2048;
1354
        maxLevel= 2047;
1355
    }else if(s->out_format==FMT_MPEG1){
1356
        /* mpeg1 */
1357
        minLevel= -255;
1358
        maxLevel= 255;
1359
    }else if(s->out_format==FMT_MJPEG){
1360
        /* (m)jpeg */
1361
        minLevel= -1023;
1362
        maxLevel= 1023;
1363
    }else{
1364
        /* h263 / msmpeg4 */
1365
        minLevel= -128;
1366
        maxLevel= 127;
1367
    }
1368

    
1369
    av_fdct (block);
1370

    
1371
    /* we need this permutation so that we correct the IDCT
1372
       permutation. will be moved into DCT code */
1373
    block_permute(block);
1374

    
1375
    if (s->mb_intra) {
1376
        if (n < 4)
1377
            q = s->y_dc_scale;
1378
        else
1379
            q = s->c_dc_scale;
1380
        q = q << 3;
1381
        
1382
        /* note: block[0] is assumed to be positive */
1383
        block[0] = (block[0] + (q >> 1)) / q;
1384
        i = 1;
1385
        last_non_zero = 0;
1386
        if (s->out_format == FMT_H263) {
1387
            qmat = s->q_non_intra_matrix;
1388
        } else {
1389
            qmat = s->q_intra_matrix;
1390
        }
1391
    } else {
1392
        i = 0;
1393
        last_non_zero = -1;
1394
        qmat = s->q_non_intra_matrix;
1395
    }
1396

    
1397
    for(;i<64;i++) {
1398
        j = zigzag_direct[i];
1399
        level = block[j];
1400
        level = level * qmat[j];
1401
#ifdef PARANOID
1402
        {
1403
            static int count = 0;
1404
            int level1, level2, qmat1;
1405
            double val;
1406
            if (qmat == s->q_non_intra_matrix) {
1407
                qmat1 = default_non_intra_matrix[j] * s->qscale;
1408
            } else {
1409
                qmat1 = default_intra_matrix[j] * s->qscale;
1410
            }
1411
            if (av_fdct != jpeg_fdct_ifast)
1412
                val = ((double)block[j] * 8.0) / (double)qmat1;
1413
            else
1414
                val = ((double)block[j] * 8.0 * 2048.0) / 
1415
                    ((double)qmat1 * aanscales[j]);
1416
            level1 = (int)val;
1417
            level2 = level / (1 << (QMAT_SHIFT - 3));
1418
            if (level1 != level2) {
1419
                fprintf(stderr, "%d: quant error qlevel=%d wanted=%d level=%d qmat1=%d qmat=%d wantedf=%0.6f\n", 
1420
                        count, level2, level1, block[j], qmat1, qmat[j],
1421
                        val);
1422
                count++;
1423
            }
1424

    
1425
        }
1426
#endif
1427
        /* XXX: slight error for the low range. Test should be equivalent to
1428
           (level <= -(1 << (QMAT_SHIFT - 3)) || level >= (1 <<
1429
           (QMAT_SHIFT - 3)))
1430
        */
1431
        if (((level << (31 - (QMAT_SHIFT - 3))) >> (31 - (QMAT_SHIFT - 3))) != 
1432
            level) {
1433
            level = level / (1 << (QMAT_SHIFT - 3));
1434
            /* XXX: currently, this code is not optimal. the range should be:
1435
               mpeg1: -255..255
1436
               mpeg2: -2048..2047
1437
               h263:  -128..127
1438
               mpeg4: -2048..2047
1439
            */
1440
            if (level > maxLevel)
1441
                level = maxLevel;
1442
            else if (level < minLevel)
1443
                level = minLevel;
1444

    
1445
            block[j] = level;
1446
            last_non_zero = i;
1447
        } else {
1448
            block[j] = 0;
1449
        }
1450
    }
1451
    return last_non_zero;
1452
}
1453

    
1454
static void dct_unquantize_mpeg1_c(MpegEncContext *s, 
1455
                                   DCTELEM *block, int n, int qscale)
1456
{
1457
    int i, level, nCoeffs;
1458
    const UINT16 *quant_matrix;
1459

    
1460
    if(s->alternate_scan) nCoeffs= 64;
1461
    else nCoeffs= s->block_last_index[n]+1;
1462
    
1463
    if (s->mb_intra) {
1464
        if (n < 4) 
1465
            block[0] = block[0] * s->y_dc_scale;
1466
        else
1467
            block[0] = block[0] * s->c_dc_scale;
1468
        /* XXX: only mpeg1 */
1469
        quant_matrix = s->intra_matrix;
1470
        for(i=1;i<nCoeffs;i++) {
1471
            int j= zigzag_direct[i];
1472
            level = block[j];
1473
            if (level) {
1474
                if (level < 0) {
1475
                    level = -level;
1476
                    level = (int)(level * qscale * quant_matrix[j]) >> 3;
1477
                    level = (level - 1) | 1;
1478
                    level = -level;
1479
                } else {
1480
                    level = (int)(level * qscale * quant_matrix[j]) >> 3;
1481
                    level = (level - 1) | 1;
1482
                }
1483
#ifdef PARANOID
1484
                if (level < -2048 || level > 2047)
1485
                    fprintf(stderr, "unquant error %d %d\n", i, level);
1486
#endif
1487
                block[j] = level;
1488
            }
1489
        }
1490
    } else {
1491
        i = 0;
1492
        quant_matrix = s->non_intra_matrix;
1493
        for(;i<nCoeffs;i++) {
1494
            int j= zigzag_direct[i];
1495
            level = block[j];
1496
            if (level) {
1497
                if (level < 0) {
1498
                    level = -level;
1499
                    level = (((level << 1) + 1) * qscale *
1500
                             ((int) (quant_matrix[j]))) >> 4;
1501
                    level = (level - 1) | 1;
1502
                    level = -level;
1503
                } else {
1504
                    level = (((level << 1) + 1) * qscale *
1505
                             ((int) (quant_matrix[j]))) >> 4;
1506
                    level = (level - 1) | 1;
1507
                }
1508
#ifdef PARANOID
1509
                if (level < -2048 || level > 2047)
1510
                    fprintf(stderr, "unquant error %d %d\n", i, level);
1511
#endif
1512
                block[j] = level;
1513
            }
1514
        }
1515
    }
1516
}
1517

    
1518
static void dct_unquantize_h263_c(MpegEncContext *s, 
1519
                                  DCTELEM *block, int n, int qscale)
1520
{
1521
    int i, level, qmul, qadd;
1522
    int nCoeffs;
1523
    
1524
    if (s->mb_intra) {
1525
        if (!s->h263_aic) {
1526
            if (n < 4) 
1527
                block[0] = block[0] * s->y_dc_scale;
1528
            else
1529
                block[0] = block[0] * s->c_dc_scale;
1530
        }
1531
        i = 1;
1532
        nCoeffs= 64; //does not allways use zigzag table 
1533
    } else {
1534
        i = 0;
1535
        nCoeffs= zigzag_end[ s->block_last_index[n] ];
1536
    }
1537

    
1538
    qmul = s->qscale << 1;
1539
    if (s->h263_aic && s->mb_intra)
1540
        qadd = 0;
1541
    else
1542
        qadd = (s->qscale - 1) | 1;
1543

    
1544
    for(;i<nCoeffs;i++) {
1545
        level = block[i];
1546
        if (level) {
1547
            if (level < 0) {
1548
                level = level * qmul - qadd;
1549
            } else {
1550
                level = level * qmul + qadd;
1551
            }
1552
#ifdef PARANOID
1553
                if (level < -2048 || level > 2047)
1554
                    fprintf(stderr, "unquant error %d %d\n", i, level);
1555
#endif
1556
            block[i] = level;
1557
        }
1558
    }
1559
}
1560

    
1561
/* rate control */
1562

    
1563
/* an I frame is I_FRAME_SIZE_RATIO bigger than a P frame */
1564
#define I_FRAME_SIZE_RATIO 3.0
1565
#define QSCALE_K           20
1566

    
1567
static void rate_control_init(MpegEncContext *s)
1568
{
1569
#if 1
1570
    emms_c();
1571

    
1572
    //initial values, they dont really matter as they will be totally different within a few frames
1573
    s->i_pred.coeff= s->p_pred.coeff= 7.0;
1574
    s->i_pred.count= s->p_pred.count= 1.0;
1575
    
1576
    s->i_pred.decay= s->p_pred.decay= 0.4;
1577
    
1578
    // use more bits at the beginning, otherwise high motion at the begin will look like shit
1579
    s->qsum=100;
1580
    s->qcount=100;
1581

    
1582
    s->short_term_qsum=0.001;
1583
    s->short_term_qcount=0.001;
1584
#else
1585
    s->wanted_bits = 0;
1586

    
1587
    if (s->intra_only) {
1588
        s->I_frame_bits = ((INT64)s->bit_rate * FRAME_RATE_BASE) / s->frame_rate;
1589
        s->P_frame_bits = s->I_frame_bits;
1590
    } else {
1591
        s->P_frame_bits = (int) ((float)(s->gop_size * s->bit_rate) / 
1592
                                 (float)((float)s->frame_rate / FRAME_RATE_BASE * (I_FRAME_SIZE_RATIO + s->gop_size - 1)));
1593
        s->I_frame_bits = (int)(s->P_frame_bits * I_FRAME_SIZE_RATIO);
1594
    }
1595

    
1596
#if defined(DEBUG)
1597
    printf("I_frame_size=%d P_frame_size=%d\n",
1598
           s->I_frame_bits, s->P_frame_bits);
1599
#endif
1600
#endif
1601
}
1602

    
1603
static double predict(Predictor *p, double q, double var)
1604
{
1605
    return p->coeff*var / (q*p->count);
1606
}
1607

    
1608
static void update_predictor(Predictor *p, double q, double var, double size)
1609
{
1610
    double new_coeff= size*q / (var + 1);
1611
    if(var<1000) return;
1612
/*{
1613
int pred= predict(p, q, var);
1614
int error= abs(pred-size);
1615
static double sum=0;
1616
static int count=0;
1617
if(count>5) sum+=error;
1618
count++;
1619
if(256*256*256*64%count==0){
1620
    printf("%d %f %f\n", count, sum/count, p->coeff);
1621
}
1622
}*/
1623
    p->count*= p->decay;
1624
    p->coeff*= p->decay;
1625
    p->count++;
1626
    p->coeff+= new_coeff;
1627
}
1628

    
1629
static int rate_estimate_qscale(MpegEncContext *s)
1630
{
1631
#if 1
1632
    int qmin= s->qmin;
1633
    int qmax= s->qmax;
1634
    int rate_q=5;
1635
    float q;
1636
    int qscale;
1637
    float br_compensation;
1638
    double diff;
1639
    double short_term_q;
1640
    double long_term_q;
1641
    int last_qscale= s->qscale;
1642
    double fps;
1643
    INT64 wanted_bits;
1644
    emms_c();
1645
    
1646
    fps= (double)s->frame_rate / FRAME_RATE_BASE;
1647
    wanted_bits= s->bit_rate*(double)s->picture_number/fps;
1648

    
1649
    
1650
    if(s->picture_number>2){
1651
        /* update predictors */
1652
        if(s->last_pict_type == I_TYPE){
1653
        //FIXME
1654
        }else{ //P Frame
1655
//printf("%d %d %d %f\n", s->qscale, s->last_mc_mb_var, s->frame_bits, s->p_pred.coeff);
1656
            update_predictor(&s->p_pred, s->qscale, s->last_mc_mb_var, s->frame_bits);
1657
        }
1658
    }
1659

    
1660
    if(s->pict_type == I_TYPE){
1661
        //FIXME
1662
        rate_q= s->qsum/s->qcount;
1663
    }else{ //P Frame
1664
        int i;
1665
        int diff, best_diff=1000000000;
1666
        for(i=1; i<=31; i++){
1667
            diff= predict(&s->p_pred, i, s->mc_mb_var) - (double)s->bit_rate/fps;
1668
            if(diff<0) diff= -diff;
1669
            if(diff<best_diff){
1670
                best_diff= diff;
1671
                rate_q= i;
1672
            }
1673
        }
1674
    }
1675

    
1676
    s->short_term_qsum*=s->qblur;
1677
    s->short_term_qcount*=s->qblur;
1678

    
1679
    s->short_term_qsum+= rate_q;
1680
    s->short_term_qcount++;
1681
    short_term_q= s->short_term_qsum/s->short_term_qcount;
1682
    
1683
    long_term_q= s->qsum/s->qcount*s->total_bits/wanted_bits;
1684

    
1685
//    q= (long_term_q - short_term_q)*s->qcompress + short_term_q;
1686
    q= 1/((1/long_term_q - 1/short_term_q)*s->qcompress + 1/short_term_q);
1687

    
1688
    diff= s->total_bits - wanted_bits;
1689
    br_compensation= (s->bit_rate_tolerance - diff)/s->bit_rate_tolerance;
1690
    if(br_compensation<=0.0) br_compensation=0.001;
1691
    q/=br_compensation;
1692

    
1693
    qscale= (int)(q + 0.5);
1694
    if     (qscale<qmin) qscale=qmin;
1695
    else if(qscale>qmax) qscale=qmax;
1696
    
1697
    if     (qscale<last_qscale-s->max_qdiff) qscale=last_qscale-s->max_qdiff;
1698
    else if(qscale>last_qscale+s->max_qdiff) qscale=last_qscale+s->max_qdiff;
1699

    
1700
    s->qsum+= qscale;
1701
    s->qcount++;
1702

    
1703
    s->last_pict_type= s->pict_type;
1704
//printf("q:%d diff:%d comp:%f rate_q:%d st_q:%d fvar:%d last_size:%d\n", qscale, (int)diff, br_compensation, 
1705
//       rate_q, (int)short_term_q, s->mc_mb_var, s->frame_bits);
1706
//printf("%d %d\n", s->bit_rate, (int)fps);
1707
    return qscale;
1708
#else
1709
    INT64 diff, total_bits = s->total_bits;
1710
    float q;
1711
    int qscale;
1712
    if (s->pict_type == I_TYPE) {
1713
        s->wanted_bits += s->I_frame_bits;
1714
    } else {
1715
        s->wanted_bits += s->P_frame_bits;
1716
    }
1717
    diff = s->wanted_bits - total_bits;
1718
    q = 31.0 - (float)diff / (QSCALE_K * s->mb_height * s->mb_width);
1719
    /* adjust for I frame */
1720
    if (s->pict_type == I_TYPE && !s->intra_only) {
1721
        q /= I_FRAME_SIZE_RATIO;
1722
    }
1723

    
1724
    /* using a too small Q scale leeds to problems in mpeg1 and h263
1725
       because AC coefficients are clamped to 255 or 127 */
1726
    qmin = 3;
1727
    if (q < qmin)
1728
        q = qmin;
1729
    else if (q > 31)
1730
        q = 31;
1731
    qscale = (int)(q + 0.5);
1732
#if defined(DEBUG)
1733
    printf("\n%d: total=%0.0f wanted=%0.0f br=%0.1f diff=%d qest=%2.1f\n", 
1734
           s->picture_number, 
1735
           (double)total_bits, 
1736
           (double)s->wanted_bits,
1737
           (float)s->frame_rate / FRAME_RATE_BASE * 
1738
           total_bits / s->picture_number, 
1739
           (int)diff, q);
1740
#endif
1741
    return qscale;
1742
#endif
1743
}
1744

    
1745
AVCodec mpeg1video_encoder = {
1746
    "mpeg1video",
1747
    CODEC_TYPE_VIDEO,
1748
    CODEC_ID_MPEG1VIDEO,
1749
    sizeof(MpegEncContext),
1750
    MPV_encode_init,
1751
    MPV_encode_picture,
1752
    MPV_encode_end,
1753
};
1754

    
1755
AVCodec h263_encoder = {
1756
    "h263",
1757
    CODEC_TYPE_VIDEO,
1758
    CODEC_ID_H263,
1759
    sizeof(MpegEncContext),
1760
    MPV_encode_init,
1761
    MPV_encode_picture,
1762
    MPV_encode_end,
1763
};
1764

    
1765
AVCodec h263p_encoder = {
1766
    "h263p",
1767
    CODEC_TYPE_VIDEO,
1768
    CODEC_ID_H263P,
1769
    sizeof(MpegEncContext),
1770
    MPV_encode_init,
1771
    MPV_encode_picture,
1772
    MPV_encode_end,
1773
};
1774

    
1775
AVCodec rv10_encoder = {
1776
    "rv10",
1777
    CODEC_TYPE_VIDEO,
1778
    CODEC_ID_RV10,
1779
    sizeof(MpegEncContext),
1780
    MPV_encode_init,
1781
    MPV_encode_picture,
1782
    MPV_encode_end,
1783
};
1784

    
1785
AVCodec mjpeg_encoder = {
1786
    "mjpeg",
1787
    CODEC_TYPE_VIDEO,
1788
    CODEC_ID_MJPEG,
1789
    sizeof(MpegEncContext),
1790
    MPV_encode_init,
1791
    MPV_encode_picture,
1792
    MPV_encode_end,
1793
};
1794

    
1795
AVCodec mpeg4_encoder = {
1796
    "mpeg4",
1797
    CODEC_TYPE_VIDEO,
1798
    CODEC_ID_MPEG4,
1799
    sizeof(MpegEncContext),
1800
    MPV_encode_init,
1801
    MPV_encode_picture,
1802
    MPV_encode_end,
1803
};
1804

    
1805
AVCodec msmpeg4_encoder = {
1806
    "msmpeg4",
1807
    CODEC_TYPE_VIDEO,
1808
    CODEC_ID_MSMPEG4,
1809
    sizeof(MpegEncContext),
1810
    MPV_encode_init,
1811
    MPV_encode_picture,
1812
    MPV_encode_end,
1813
};