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ffmpeg / libavcodec / mpeg12enc.c @ 6e21a5b1

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1
/*
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 * MPEG1/2 encoder
3
 * Copyright (c) 2000,2001 Fabrice Bellard
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
23
/**
24
 * @file libavcodec/mpeg12enc.c
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 * MPEG1/2 encoder
26
 */
27

    
28
#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
31

    
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#include "mpeg12.h"
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#include "mpeg12data.h"
34
#include "bytestream.h"
35

    
36

    
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static const uint8_t inv_non_linear_qscale[13] = {
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    0, 2, 4, 6, 8,
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    9,10,11,12,13,14,15,16,
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};
41

    
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static const uint8_t svcd_scan_offset_placeholder[14] = {
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    0x10, 0x0E,
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    0x00, 0x80, 0x81,
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    0x00, 0x80, 0x81,
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    0xff, 0xff, 0xff,
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    0xff, 0xff, 0xff,
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};
49

    
50
static void mpeg1_encode_block(MpegEncContext *s,
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                         DCTELEM *block,
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                         int component);
53
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code);    // RAL: f_code parameter added
54

    
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static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
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static uint8_t fcode_tab[MAX_MV*2+1];
57

    
58
static uint8_t  uni_mpeg1_ac_vlc_len [64*64*2];
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static uint8_t  uni_mpeg2_ac_vlc_len [64*64*2];
60

    
61
/* simple include everything table for dc, first byte is bits number next 3 are code*/
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static uint32_t mpeg1_lum_dc_uni[512];
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static uint32_t mpeg1_chr_dc_uni[512];
64

    
65
static uint8_t mpeg1_index_run[2][64];
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static int8_t mpeg1_max_level[2][64];
67

    
68
static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
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    int i;
70

    
71
    for(i=0; i<128; i++){
72
        int level= i-64;
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        int run;
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        for(run=0; run<64; run++){
75
            int len, bits, code;
76

    
77
            int alevel= FFABS(level);
78
            int sign= (level>>31)&1;
79

    
80
            if (alevel > rl->max_level[0][run])
81
                code= 111; /*rl->n*/
82
            else
83
                code= rl->index_run[0][run] + alevel - 1;
84

    
85
            if (code < 111 /* rl->n */) {
86
                /* store the vlc & sign at once */
87
                len=   rl->table_vlc[code][1]+1;
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                bits= (rl->table_vlc[code][0]<<1) + sign;
89
            } else {
90
                len=  rl->table_vlc[111/*rl->n*/][1]+6;
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                bits= rl->table_vlc[111/*rl->n*/][0]<<6;
92

    
93
                bits|= run;
94
                if (alevel < 128) {
95
                    bits<<=8; len+=8;
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                    bits|= level & 0xff;
97
                } else {
98
                    bits<<=16; len+=16;
99
                    bits|= level & 0xff;
100
                    if (level < 0) {
101
                        bits|= 0x8001 + level + 255;
102
                    } else {
103
                        bits|= level & 0xffff;
104
                    }
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                }
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            }
107

    
108
            uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
109
        }
110
    }
111
}
112

    
113

    
114
static int find_frame_rate_index(MpegEncContext *s){
115
    int i;
116
    int64_t dmin= INT64_MAX;
117
    int64_t d;
118

    
119
    for(i=1;i<14;i++) {
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        int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
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        int64_t n1= 1001LL*s->avctx->time_base.den;
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        if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
123

    
124
        d = FFABS(n0 - n1);
125
        if(d < dmin){
126
            dmin=d;
127
            s->frame_rate_index= i;
128
        }
129
    }
130
    if(dmin)
131
        return -1;
132
    else
133
        return 0;
134
}
135

    
136
static av_cold int encode_init(AVCodecContext *avctx)
137
{
138
    MpegEncContext *s = avctx->priv_data;
139

    
140
    if(MPV_encode_init(avctx) < 0)
141
        return -1;
142

    
143
    if(find_frame_rate_index(s) < 0){
144
        if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
145
            av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
146
            return -1;
147
        }else{
148
            av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
149
        }
150
    }
151

    
152
    if(avctx->profile == FF_PROFILE_UNKNOWN){
153
        if(avctx->level != FF_LEVEL_UNKNOWN){
154
            av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
155
            return -1;
156
        }
157
        avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
158
    }
159

    
160
    if(avctx->level == FF_LEVEL_UNKNOWN){
161
        if(avctx->profile == 0){ /* 4:2:2 */
162
            if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
163
            else                                            avctx->level = 2; /* High */
164
        }else{
165
            if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
166
                av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
167
                return -1;
168
            }
169
            if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
170
            else if(avctx->width <= 1440)                   avctx->level = 6; /* High 1440 */
171
            else                                            avctx->level = 4; /* High */
172
        }
173
    }
174

    
175
    if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
176
        av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
177
        return -1;
178
    }
179

    
180
    return 0;
181
}
182

    
183
static void put_header(MpegEncContext *s, int header)
184
{
185
    align_put_bits(&s->pb);
186
    put_bits(&s->pb, 16, header>>16);
187
    put_sbits(&s->pb, 16, header);
188
}
189

    
190
/* put sequence header if needed */
191
static void mpeg1_encode_sequence_header(MpegEncContext *s)
192
{
193
        unsigned int vbv_buffer_size;
194
        unsigned int fps, v;
195
        int i;
196
        uint64_t time_code;
197
        float best_aspect_error= 1E10;
198
        float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
199
        int constraint_parameter_flag;
200

    
201
        if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
202

    
203
        if (s->current_picture.key_frame) {
204
            AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
205

    
206
            /* mpeg1 header repeated every gop */
207
            put_header(s, SEQ_START_CODE);
208

    
209
            put_sbits(&s->pb, 12, s->width );
210
            put_sbits(&s->pb, 12, s->height);
211

    
212
            for(i=1; i<15; i++){
213
                float error= aspect_ratio;
214
                if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
215
                    error-= 1.0/ff_mpeg1_aspect[i];
216
                else
217
                    error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
218

    
219
                error= FFABS(error);
220

    
221
                if(error < best_aspect_error){
222
                    best_aspect_error= error;
223
                    s->aspect_ratio_info= i;
224
                }
225
            }
226

    
227
            put_bits(&s->pb, 4, s->aspect_ratio_info);
228
            put_bits(&s->pb, 4, s->frame_rate_index);
229

    
230
            if(s->avctx->rc_max_rate){
231
                v = (s->avctx->rc_max_rate + 399) / 400;
232
                if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
233
                    v = 0x3ffff;
234
            }else{
235
                v= 0x3FFFF;
236
            }
237

    
238
            if(s->avctx->rc_buffer_size)
239
                vbv_buffer_size = s->avctx->rc_buffer_size;
240
            else
241
                /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
242
                vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
243
            vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
244

    
245
            put_sbits(&s->pb, 18, v);
246
            put_bits(&s->pb, 1, 1); /* marker */
247
            put_sbits(&s->pb, 10, vbv_buffer_size);
248

    
249
            constraint_parameter_flag=
250
                s->width <= 768 && s->height <= 576 &&
251
                s->mb_width * s->mb_height <= 396 &&
252
                s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
253
                framerate.num <= framerate.den*30 &&
254
                s->avctx->me_range && s->avctx->me_range < 128 &&
255
                vbv_buffer_size <= 20 &&
256
                v <= 1856000/400 &&
257
                s->codec_id == CODEC_ID_MPEG1VIDEO;
258

    
259
            put_bits(&s->pb, 1, constraint_parameter_flag);
260

    
261
            ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
262
            ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
263

    
264
            if(s->codec_id == CODEC_ID_MPEG2VIDEO){
265
                put_header(s, EXT_START_CODE);
266
                put_bits(&s->pb, 4, 1); //seq ext
267

    
268
                put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
269

    
270
                put_bits(&s->pb, 3, s->avctx->profile); //profile
271
                put_bits(&s->pb, 4, s->avctx->level); //level
272

    
273
                put_bits(&s->pb, 1, s->progressive_sequence);
274
                put_bits(&s->pb, 2, s->chroma_format);
275
                put_bits(&s->pb, 2, s->width >>12);
276
                put_bits(&s->pb, 2, s->height>>12);
277
                put_bits(&s->pb, 12, v>>18); //bitrate ext
278
                put_bits(&s->pb, 1, 1); //marker
279
                put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
280
                put_bits(&s->pb, 1, s->low_delay);
281
                put_bits(&s->pb, 2, 0); // frame_rate_ext_n
282
                put_bits(&s->pb, 5, 0); // frame_rate_ext_d
283
            }
284

    
285
            put_header(s, GOP_START_CODE);
286
            put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
287
            /* time code : we must convert from the real frame rate to a
288
               fake mpeg frame rate in case of low frame rate */
289
            fps = (framerate.num + framerate.den/2)/ framerate.den;
290
            time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
291

    
292
            s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
293
            if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
294
                /* only works for NTSC 29.97 */
295
                int d = time_code / 17982;
296
                int m = time_code % 17982;
297
                //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
298
                time_code += 18 * d + 2 * ((m - 2) / 1798);
299
            }
300
            put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
301
            put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
302
            put_bits(&s->pb, 1, 1);
303
            put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
304
            put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
305
            put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
306
            put_bits(&s->pb, 1, 0); /* broken link */
307
        }
308
}
309

    
310
static inline void encode_mb_skip_run(MpegEncContext *s, int run){
311
    while (run >= 33) {
312
        put_bits(&s->pb, 11, 0x008);
313
        run -= 33;
314
    }
315
    put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
316
             ff_mpeg12_mbAddrIncrTable[run][0]);
317
}
318

    
319
static av_always_inline void put_qscale(MpegEncContext *s)
320
{
321
    if(s->q_scale_type){
322
        assert(s->qscale>=1 && s->qscale <=12);
323
        put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
324
    }else{
325
        put_bits(&s->pb, 5, s->qscale);
326
    }
327
}
328

    
329
void ff_mpeg1_encode_slice_header(MpegEncContext *s){
330
    put_header(s, SLICE_MIN_START_CODE + s->mb_y);
331
    put_qscale(s);
332
    put_bits(&s->pb, 1, 0); /* slice extra information */
333
}
334

    
335
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
336
{
337
    mpeg1_encode_sequence_header(s);
338

    
339
    /* mpeg1 picture header */
340
    put_header(s, PICTURE_START_CODE);
341
    /* temporal reference */
342

    
343
    // RAL: s->picture_number instead of s->fake_picture_number
344
    put_bits(&s->pb, 10, (s->picture_number -
345
                          s->gop_picture_number) & 0x3ff);
346
    put_bits(&s->pb, 3, s->pict_type);
347

    
348
    s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
349
    put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
350

    
351
    // RAL: Forward f_code also needed for B frames
352
    if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
353
        put_bits(&s->pb, 1, 0); /* half pel coordinates */
354
        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
355
            put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
356
        else
357
            put_bits(&s->pb, 3, 7); /* forward_f_code */
358
    }
359

    
360
    // RAL: Backward f_code necessary for B frames
361
    if (s->pict_type == FF_B_TYPE) {
362
        put_bits(&s->pb, 1, 0); /* half pel coordinates */
363
        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
364
            put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
365
        else
366
            put_bits(&s->pb, 3, 7); /* backward_f_code */
367
    }
368

    
369
    put_bits(&s->pb, 1, 0); /* extra bit picture */
370

    
371
    s->frame_pred_frame_dct = 1;
372
    if(s->codec_id == CODEC_ID_MPEG2VIDEO){
373
        put_header(s, EXT_START_CODE);
374
        put_bits(&s->pb, 4, 8); //pic ext
375
        if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
376
            put_bits(&s->pb, 4, s->f_code);
377
            put_bits(&s->pb, 4, s->f_code);
378
        }else{
379
            put_bits(&s->pb, 8, 255);
380
        }
381
        if (s->pict_type == FF_B_TYPE) {
382
            put_bits(&s->pb, 4, s->b_code);
383
            put_bits(&s->pb, 4, s->b_code);
384
        }else{
385
            put_bits(&s->pb, 8, 255);
386
        }
387
        put_bits(&s->pb, 2, s->intra_dc_precision);
388

    
389
        assert(s->picture_structure == PICT_FRAME);
390
        put_bits(&s->pb, 2, s->picture_structure);
391
        if (s->progressive_sequence) {
392
            put_bits(&s->pb, 1, 0); /* no repeat */
393
        } else {
394
            put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
395
        }
396
        /* XXX: optimize the generation of this flag with entropy
397
           measures */
398
        s->frame_pred_frame_dct = s->progressive_sequence;
399

    
400
        put_bits(&s->pb, 1, s->frame_pred_frame_dct);
401
        put_bits(&s->pb, 1, s->concealment_motion_vectors);
402
        put_bits(&s->pb, 1, s->q_scale_type);
403
        put_bits(&s->pb, 1, s->intra_vlc_format);
404
        put_bits(&s->pb, 1, s->alternate_scan);
405
        put_bits(&s->pb, 1, s->repeat_first_field);
406
        s->progressive_frame = s->progressive_sequence;
407
        put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
408
        put_bits(&s->pb, 1, s->progressive_frame);
409
        put_bits(&s->pb, 1, 0); //composite_display_flag
410
    }
411
    if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
412
        int i;
413

    
414
        put_header(s, USER_START_CODE);
415
        for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
416
            put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
417
        }
418
    }
419

    
420
    s->mb_y=0;
421
    ff_mpeg1_encode_slice_header(s);
422
}
423

    
424
static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
425
                                int has_mv, int field_motion)
426
{
427
    put_bits(&s->pb, n, bits);
428
    if (!s->frame_pred_frame_dct) {
429
        if (has_mv)
430
            put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
431
        put_bits(&s->pb, 1, s->interlaced_dct);
432
    }
433
}
434

    
435
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
436
                                                   DCTELEM block[6][64],
437
                                                   int motion_x, int motion_y,
438
                                                   int mb_block_count)
439
{
440
    int i, cbp;
441
    const int mb_x = s->mb_x;
442
    const int mb_y = s->mb_y;
443
    const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
444

    
445
    /* compute cbp */
446
    cbp = 0;
447
    for(i=0;i<mb_block_count;i++) {
448
        if (s->block_last_index[i] >= 0)
449
            cbp |= 1 << (mb_block_count - 1 - i);
450
    }
451

    
452
    if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
453
        (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
454
        ((s->pict_type == FF_P_TYPE && (motion_x | motion_y) == 0) ||
455
        (s->pict_type == FF_B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
456
        ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
457
        s->mb_skip_run++;
458
        s->qscale -= s->dquant;
459
        s->skip_count++;
460
        s->misc_bits++;
461
        s->last_bits++;
462
        if(s->pict_type == FF_P_TYPE){
463
            s->last_mv[0][1][0]= s->last_mv[0][0][0]=
464
            s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
465
        }
466
    } else {
467
        if(first_mb){
468
            assert(s->mb_skip_run == 0);
469
            encode_mb_skip_run(s, s->mb_x);
470
        }else{
471
            encode_mb_skip_run(s, s->mb_skip_run);
472
        }
473

    
474
        if (s->pict_type == FF_I_TYPE) {
475
            if(s->dquant && cbp){
476
                put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
477
                put_qscale(s);
478
            }else{
479
                put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
480
                s->qscale -= s->dquant;
481
            }
482
            s->misc_bits+= get_bits_diff(s);
483
            s->i_count++;
484
        } else if (s->mb_intra) {
485
            if(s->dquant && cbp){
486
                put_mb_modes(s, 6, 0x01, 0, 0);
487
                put_qscale(s);
488
            }else{
489
                put_mb_modes(s, 5, 0x03, 0, 0);
490
                s->qscale -= s->dquant;
491
            }
492
            s->misc_bits+= get_bits_diff(s);
493
            s->i_count++;
494
            memset(s->last_mv, 0, sizeof(s->last_mv));
495
        } else if (s->pict_type == FF_P_TYPE) {
496
            if(s->mv_type == MV_TYPE_16X16){
497
                if (cbp != 0) {
498
                    if ((motion_x|motion_y) == 0) {
499
                        if(s->dquant){
500
                            put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
501
                            put_qscale(s);
502
                        }else{
503
                            put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
504
                        }
505
                        s->misc_bits+= get_bits_diff(s);
506
                    } else {
507
                        if(s->dquant){
508
                            put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
509
                            put_qscale(s);
510
                        }else{
511
                            put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
512
                        }
513
                        s->misc_bits+= get_bits_diff(s);
514
                        mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
515
                        mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
516
                        s->mv_bits+= get_bits_diff(s);
517
                    }
518
                } else {
519
                    put_bits(&s->pb, 3, 1); /* motion only */
520
                    if (!s->frame_pred_frame_dct)
521
                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
522
                    s->misc_bits+= get_bits_diff(s);
523
                    mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
524
                    mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
525
                    s->qscale -= s->dquant;
526
                    s->mv_bits+= get_bits_diff(s);
527
                }
528
                s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
529
                s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
530
            }else{
531
                assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
532

    
533
                if (cbp) {
534
                    if(s->dquant){
535
                        put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
536
                        put_qscale(s);
537
                    }else{
538
                        put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
539
                    }
540
                } else {
541
                    put_bits(&s->pb, 3, 1); /* motion only */
542
                    put_bits(&s->pb, 2, 1); /* motion_type: field */
543
                    s->qscale -= s->dquant;
544
                }
545
                s->misc_bits+= get_bits_diff(s);
546
                for(i=0; i<2; i++){
547
                    put_bits(&s->pb, 1, s->field_select[0][i]);
548
                    mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
549
                    mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
550
                    s->last_mv[0][i][0]=   s->mv[0][i][0];
551
                    s->last_mv[0][i][1]= 2*s->mv[0][i][1];
552
                }
553
                s->mv_bits+= get_bits_diff(s);
554
            }
555
            if(cbp) {
556
                if (s->chroma_y_shift) {
557
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
558
                } else {
559
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
560
                    put_sbits(&s->pb, 2, cbp);
561
                }
562
            }
563
            s->f_count++;
564
        } else{
565
            if(s->mv_type == MV_TYPE_16X16){
566
                if (cbp){    // With coded bloc pattern
567
                    if (s->dquant) {
568
                        if(s->mv_dir == MV_DIR_FORWARD)
569
                            put_mb_modes(s, 6, 3, 1, 0);
570
                        else
571
                            put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
572
                        put_qscale(s);
573
                    } else {
574
                        put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
575
                    }
576
                }else{    // No coded bloc pattern
577
                    put_bits(&s->pb, 5-s->mv_dir, 2);
578
                    if (!s->frame_pred_frame_dct)
579
                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
580
                    s->qscale -= s->dquant;
581
                }
582
                s->misc_bits += get_bits_diff(s);
583
                if (s->mv_dir&MV_DIR_FORWARD){
584
                    mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
585
                    mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
586
                    s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
587
                    s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
588
                    s->f_count++;
589
                }
590
                if (s->mv_dir&MV_DIR_BACKWARD){
591
                    mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
592
                    mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
593
                    s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
594
                    s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
595
                    s->b_count++;
596
                }
597
            }else{
598
                assert(s->mv_type == MV_TYPE_FIELD);
599
                assert(!s->frame_pred_frame_dct);
600
                if (cbp){    // With coded bloc pattern
601
                    if (s->dquant) {
602
                        if(s->mv_dir == MV_DIR_FORWARD)
603
                            put_mb_modes(s, 6, 3, 1, 1);
604
                        else
605
                            put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
606
                        put_qscale(s);
607
                    } else {
608
                        put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
609
                    }
610
                }else{    // No coded bloc pattern
611
                    put_bits(&s->pb, 5-s->mv_dir, 2);
612
                    put_bits(&s->pb, 2, 1); /* motion_type: field */
613
                    s->qscale -= s->dquant;
614
                }
615
                s->misc_bits += get_bits_diff(s);
616
                if (s->mv_dir&MV_DIR_FORWARD){
617
                    for(i=0; i<2; i++){
618
                        put_bits(&s->pb, 1, s->field_select[0][i]);
619
                        mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
620
                        mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
621
                        s->last_mv[0][i][0]=   s->mv[0][i][0];
622
                        s->last_mv[0][i][1]= 2*s->mv[0][i][1];
623
                    }
624
                    s->f_count++;
625
                }
626
                if (s->mv_dir&MV_DIR_BACKWARD){
627
                    for(i=0; i<2; i++){
628
                        put_bits(&s->pb, 1, s->field_select[1][i]);
629
                        mpeg1_encode_motion(s, s->mv[1][i][0] -  s->last_mv[1][i][0]    , s->b_code);
630
                        mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
631
                        s->last_mv[1][i][0]=   s->mv[1][i][0];
632
                        s->last_mv[1][i][1]= 2*s->mv[1][i][1];
633
                    }
634
                    s->b_count++;
635
                }
636
            }
637
            s->mv_bits += get_bits_diff(s);
638
            if(cbp) {
639
                if (s->chroma_y_shift) {
640
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
641
                } else {
642
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
643
                    put_sbits(&s->pb, 2, cbp);
644
                }
645
            }
646
        }
647
        for(i=0;i<mb_block_count;i++) {
648
            if (cbp & (1 << (mb_block_count - 1 - i))) {
649
                mpeg1_encode_block(s, block[i], i);
650
            }
651
        }
652
        s->mb_skip_run = 0;
653
        if(s->mb_intra)
654
            s->i_tex_bits+= get_bits_diff(s);
655
        else
656
            s->p_tex_bits+= get_bits_diff(s);
657
    }
658
}
659

    
660
void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
661
{
662
    if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
663
    else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
664
}
665

    
666
// RAL: Parameter added: f_or_b_code
667
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
668
{
669
    if (val == 0) {
670
        /* zero vector */
671
        put_bits(&s->pb,
672
                 ff_mpeg12_mbMotionVectorTable[0][1],
673
                 ff_mpeg12_mbMotionVectorTable[0][0]);
674
    } else {
675
        int code, sign, bits;
676
        int bit_size = f_or_b_code - 1;
677
        int range = 1 << bit_size;
678
        /* modulo encoding */
679
        int l= INT_BIT - 5 - bit_size;
680
        val= (val<<l)>>l;
681

    
682
        if (val >= 0) {
683
            val--;
684
            code = (val >> bit_size) + 1;
685
            bits = val & (range - 1);
686
            sign = 0;
687
        } else {
688
            val = -val;
689
            val--;
690
            code = (val >> bit_size) + 1;
691
            bits = val & (range - 1);
692
            sign = 1;
693
        }
694

    
695
        assert(code > 0 && code <= 16);
696

    
697
        put_bits(&s->pb,
698
                 ff_mpeg12_mbMotionVectorTable[code][1],
699
                 ff_mpeg12_mbMotionVectorTable[code][0]);
700

    
701
        put_bits(&s->pb, 1, sign);
702
        if (bit_size > 0) {
703
            put_bits(&s->pb, bit_size, bits);
704
        }
705
    }
706
}
707

    
708
void ff_mpeg1_encode_init(MpegEncContext *s)
709
{
710
    static int done=0;
711

    
712
    ff_mpeg12_common_init(s);
713

    
714
    if(!done){
715
        int f_code;
716
        int mv;
717
        int i;
718

    
719
        done=1;
720
        init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
721
        init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
722

    
723
        for(i=0; i<64; i++)
724
        {
725
                mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
726
                mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
727
        }
728

    
729
        init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
730
        if(s->intra_vlc_format)
731
            init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
732

    
733
        /* build unified dc encoding tables */
734
        for(i=-255; i<256; i++)
735
        {
736
                int adiff, index;
737
                int bits, code;
738
                int diff=i;
739

    
740
                adiff = FFABS(diff);
741
                if(diff<0) diff--;
742
                index = av_log2(2*adiff);
743

    
744
                bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
745
                code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
746
                mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
747

    
748
                bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
749
                code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
750
                mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
751
        }
752

    
753
        for(f_code=1; f_code<=MAX_FCODE; f_code++){
754
            for(mv=-MAX_MV; mv<=MAX_MV; mv++){
755
                int len;
756

    
757
                if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
758
                else{
759
                    int val, bit_size, range, code;
760

    
761
                    bit_size = f_code - 1;
762
                    range = 1 << bit_size;
763

    
764
                    val=mv;
765
                    if (val < 0)
766
                        val = -val;
767
                    val--;
768
                    code = (val >> bit_size) + 1;
769
                    if(code<17){
770
                        len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
771
                    }else{
772
                        len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
773
                    }
774
                }
775

    
776
                mv_penalty[f_code][mv+MAX_MV]= len;
777
            }
778
        }
779

    
780

    
781
        for(f_code=MAX_FCODE; f_code>0; f_code--){
782
            for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
783
                fcode_tab[mv+MAX_MV]= f_code;
784
            }
785
        }
786
    }
787
    s->me.mv_penalty= mv_penalty;
788
    s->fcode_tab= fcode_tab;
789
    if(s->codec_id == CODEC_ID_MPEG1VIDEO){
790
        s->min_qcoeff=-255;
791
        s->max_qcoeff= 255;
792
    }else{
793
        s->min_qcoeff=-2047;
794
        s->max_qcoeff= 2047;
795
    }
796
    if (s->intra_vlc_format) {
797
        s->intra_ac_vlc_length=
798
        s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
799
    } else {
800
        s->intra_ac_vlc_length=
801
        s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
802
    }
803
    s->inter_ac_vlc_length=
804
    s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
805
}
806

    
807
static inline void encode_dc(MpegEncContext *s, int diff, int component)
808
{
809
  if(((unsigned) (diff+255)) >= 511){
810
        int index;
811

    
812
        if(diff<0){
813
            index= av_log2_16bit(-2*diff);
814
            diff--;
815
        }else{
816
            index= av_log2_16bit(2*diff);
817
        }
818
        if (component == 0) {
819
            put_bits(
820
                &s->pb,
821
                ff_mpeg12_vlc_dc_lum_bits[index] + index,
822
                (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
823
        }else{
824
            put_bits(
825
                &s->pb,
826
                ff_mpeg12_vlc_dc_chroma_bits[index] + index,
827
                (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
828
        }
829
  }else{
830
    if (component == 0) {
831
        put_bits(
832
            &s->pb,
833
            mpeg1_lum_dc_uni[diff+255]&0xFF,
834
            mpeg1_lum_dc_uni[diff+255]>>8);
835
    } else {
836
        put_bits(
837
            &s->pb,
838
            mpeg1_chr_dc_uni[diff+255]&0xFF,
839
            mpeg1_chr_dc_uni[diff+255]>>8);
840
    }
841
  }
842
}
843

    
844
static void mpeg1_encode_block(MpegEncContext *s,
845
                               DCTELEM *block,
846
                               int n)
847
{
848
    int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
849
    int code, component;
850
    const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
851

    
852
    last_index = s->block_last_index[n];
853

    
854
    /* DC coef */
855
    if (s->mb_intra) {
856
        component = (n <= 3 ? 0 : (n&1) + 1);
857
        dc = block[0]; /* overflow is impossible */
858
        diff = dc - s->last_dc[component];
859
        encode_dc(s, diff, component);
860
        s->last_dc[component] = dc;
861
        i = 1;
862
        if (s->intra_vlc_format)
863
            table_vlc = ff_rl_mpeg2.table_vlc;
864
    } else {
865
        /* encode the first coefficient : needs to be done here because
866
           it is handled slightly differently */
867
        level = block[0];
868
        if (abs(level) == 1) {
869
                code = ((uint32_t)level >> 31); /* the sign bit */
870
                put_bits(&s->pb, 2, code | 0x02);
871
                i = 1;
872
        } else {
873
            i = 0;
874
            last_non_zero = -1;
875
            goto next_coef;
876
        }
877
    }
878

    
879
    /* now quantify & encode AC coefs */
880
    last_non_zero = i - 1;
881

    
882
    for(;i<=last_index;i++) {
883
        j = s->intra_scantable.permutated[i];
884
        level = block[j];
885
    next_coef:
886
#if 0
887
        if (level != 0)
888
            dprintf(s->avctx, "level[%d]=%d\n", i, level);
889
#endif
890
        /* encode using VLC */
891
        if (level != 0) {
892
            run = i - last_non_zero - 1;
893

    
894
            alevel= level;
895
            MASK_ABS(sign, alevel)
896
            sign&=1;
897

    
898
            if (alevel <= mpeg1_max_level[0][run]){
899
                code= mpeg1_index_run[0][run] + alevel - 1;
900
                /* store the vlc & sign at once */
901
                put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
902
            } else {
903
                /* escape seems to be pretty rare <5% so I do not optimize it */
904
                put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
905
                /* escape: only clip in this case */
906
                put_bits(&s->pb, 6, run);
907
                if(s->codec_id == CODEC_ID_MPEG1VIDEO){
908
                    if (alevel < 128) {
909
                        put_sbits(&s->pb, 8, level);
910
                    } else {
911
                        if (level < 0) {
912
                            put_bits(&s->pb, 16, 0x8001 + level + 255);
913
                        } else {
914
                            put_sbits(&s->pb, 16, level);
915
                        }
916
                    }
917
                }else{
918
                    put_sbits(&s->pb, 12, level);
919
                }
920
            }
921
            last_non_zero = i;
922
        }
923
    }
924
    /* end of block */
925
    put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
926
}
927

    
928
AVCodec mpeg1video_encoder = {
929
    "mpeg1video",
930
    CODEC_TYPE_VIDEO,
931
    CODEC_ID_MPEG1VIDEO,
932
    sizeof(MpegEncContext),
933
    encode_init,
934
    MPV_encode_picture,
935
    MPV_encode_end,
936
    .supported_framerates= ff_frame_rate_tab+1,
937
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
938
    .capabilities= CODEC_CAP_DELAY,
939
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
940
};
941

    
942
AVCodec mpeg2video_encoder = {
943
    "mpeg2video",
944
    CODEC_TYPE_VIDEO,
945
    CODEC_ID_MPEG2VIDEO,
946
    sizeof(MpegEncContext),
947
    encode_init,
948
    MPV_encode_picture,
949
    MPV_encode_end,
950
    .supported_framerates= ff_frame_rate_tab+1,
951
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
952
    .capabilities= CODEC_CAP_DELAY,
953
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
954
};