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ffmpeg / libavcodec / mpeg12enc.c @ dfd2a005

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1
/*
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 * MPEG1/2 encoder
3
 * Copyright (c) 2000,2001 Fabrice Bellard
4
 * 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
11
 * 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,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * 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
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 * MPEG1/2 encoder
26
 */
27

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

    
32
#include "mpeg12.h"
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#include "mpeg12data.h"
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#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

    
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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

    
55
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++){
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        int level= i-64;
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        int run;
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        for(run=0; run<64; run++){
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            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;
96
                    bits|= level & 0xff;
97
                } else {
98
                    bits<<=16; len+=16;
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                    bits|= level & 0xff;
100
                    if (level < 0) {
101
                        bits|= 0x8001 + level + 255;
102
                    } else {
103
                        bits|= level & 0xffff;
104
                    }
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                }
106
            }
107

    
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            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++) {
120
        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;
122
        if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
123

    
124
        d = FFABS(n0 - n1);
125
        if(d < dmin){
126
            dmin=d;
127
            s->frame_rate_index= i;
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        }
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    }
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
    if (s->height > 2800) {
331
        put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
332
        put_bits(&s->pb, 3, s->mb_y >> 7);  /* slice_vertical_position_extension */
333
    } else {
334
        put_header(s, SLICE_MIN_START_CODE + s->mb_y);
335
    }
336
    put_qscale(s);
337
    put_bits(&s->pb, 1, 0); /* slice extra information */
338
}
339

    
340
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
341
{
342
    mpeg1_encode_sequence_header(s);
343

    
344
    /* mpeg1 picture header */
345
    put_header(s, PICTURE_START_CODE);
346
    /* temporal reference */
347

    
348
    // RAL: s->picture_number instead of s->fake_picture_number
349
    put_bits(&s->pb, 10, (s->picture_number -
350
                          s->gop_picture_number) & 0x3ff);
351
    put_bits(&s->pb, 3, s->pict_type);
352

    
353
    s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
354
    put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
355

    
356
    // RAL: Forward f_code also needed for B frames
357
    if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
358
        put_bits(&s->pb, 1, 0); /* half pel coordinates */
359
        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
360
            put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
361
        else
362
            put_bits(&s->pb, 3, 7); /* forward_f_code */
363
    }
364

    
365
    // RAL: Backward f_code necessary for B frames
366
    if (s->pict_type == FF_B_TYPE) {
367
        put_bits(&s->pb, 1, 0); /* half pel coordinates */
368
        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
369
            put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
370
        else
371
            put_bits(&s->pb, 3, 7); /* backward_f_code */
372
    }
373

    
374
    put_bits(&s->pb, 1, 0); /* extra bit picture */
375

    
376
    s->frame_pred_frame_dct = 1;
377
    if(s->codec_id == CODEC_ID_MPEG2VIDEO){
378
        put_header(s, EXT_START_CODE);
379
        put_bits(&s->pb, 4, 8); //pic ext
380
        if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
381
            put_bits(&s->pb, 4, s->f_code);
382
            put_bits(&s->pb, 4, s->f_code);
383
        }else{
384
            put_bits(&s->pb, 8, 255);
385
        }
386
        if (s->pict_type == FF_B_TYPE) {
387
            put_bits(&s->pb, 4, s->b_code);
388
            put_bits(&s->pb, 4, s->b_code);
389
        }else{
390
            put_bits(&s->pb, 8, 255);
391
        }
392
        put_bits(&s->pb, 2, s->intra_dc_precision);
393

    
394
        assert(s->picture_structure == PICT_FRAME);
395
        put_bits(&s->pb, 2, s->picture_structure);
396
        if (s->progressive_sequence) {
397
            put_bits(&s->pb, 1, 0); /* no repeat */
398
        } else {
399
            put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
400
        }
401
        /* XXX: optimize the generation of this flag with entropy
402
           measures */
403
        s->frame_pred_frame_dct = s->progressive_sequence;
404

    
405
        put_bits(&s->pb, 1, s->frame_pred_frame_dct);
406
        put_bits(&s->pb, 1, s->concealment_motion_vectors);
407
        put_bits(&s->pb, 1, s->q_scale_type);
408
        put_bits(&s->pb, 1, s->intra_vlc_format);
409
        put_bits(&s->pb, 1, s->alternate_scan);
410
        put_bits(&s->pb, 1, s->repeat_first_field);
411
        s->progressive_frame = s->progressive_sequence;
412
        put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
413
        put_bits(&s->pb, 1, s->progressive_frame);
414
        put_bits(&s->pb, 1, 0); //composite_display_flag
415
    }
416
    if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
417
        int i;
418

    
419
        put_header(s, USER_START_CODE);
420
        for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
421
            put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
422
        }
423
    }
424

    
425
    s->mb_y=0;
426
    ff_mpeg1_encode_slice_header(s);
427
}
428

    
429
static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
430
                                int has_mv, int field_motion)
431
{
432
    put_bits(&s->pb, n, bits);
433
    if (!s->frame_pred_frame_dct) {
434
        if (has_mv)
435
            put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
436
        put_bits(&s->pb, 1, s->interlaced_dct);
437
    }
438
}
439

    
440
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
441
                                                   DCTELEM block[6][64],
442
                                                   int motion_x, int motion_y,
443
                                                   int mb_block_count)
444
{
445
    int i, cbp;
446
    const int mb_x = s->mb_x;
447
    const int mb_y = s->mb_y;
448
    const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
449

    
450
    /* compute cbp */
451
    cbp = 0;
452
    for(i=0;i<mb_block_count;i++) {
453
        if (s->block_last_index[i] >= 0)
454
            cbp |= 1 << (mb_block_count - 1 - i);
455
    }
456

    
457
    if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
458
        (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
459
        ((s->pict_type == FF_P_TYPE && (motion_x | motion_y) == 0) ||
460
        (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) |
461
        ((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))) {
462
        s->mb_skip_run++;
463
        s->qscale -= s->dquant;
464
        s->skip_count++;
465
        s->misc_bits++;
466
        s->last_bits++;
467
        if(s->pict_type == FF_P_TYPE){
468
            s->last_mv[0][1][0]= s->last_mv[0][0][0]=
469
            s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
470
        }
471
    } else {
472
        if(first_mb){
473
            assert(s->mb_skip_run == 0);
474
            encode_mb_skip_run(s, s->mb_x);
475
        }else{
476
            encode_mb_skip_run(s, s->mb_skip_run);
477
        }
478

    
479
        if (s->pict_type == FF_I_TYPE) {
480
            if(s->dquant && cbp){
481
                put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
482
                put_qscale(s);
483
            }else{
484
                put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
485
                s->qscale -= s->dquant;
486
            }
487
            s->misc_bits+= get_bits_diff(s);
488
            s->i_count++;
489
        } else if (s->mb_intra) {
490
            if(s->dquant && cbp){
491
                put_mb_modes(s, 6, 0x01, 0, 0);
492
                put_qscale(s);
493
            }else{
494
                put_mb_modes(s, 5, 0x03, 0, 0);
495
                s->qscale -= s->dquant;
496
            }
497
            s->misc_bits+= get_bits_diff(s);
498
            s->i_count++;
499
            memset(s->last_mv, 0, sizeof(s->last_mv));
500
        } else if (s->pict_type == FF_P_TYPE) {
501
            if(s->mv_type == MV_TYPE_16X16){
502
                if (cbp != 0) {
503
                    if ((motion_x|motion_y) == 0) {
504
                        if(s->dquant){
505
                            put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
506
                            put_qscale(s);
507
                        }else{
508
                            put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
509
                        }
510
                        s->misc_bits+= get_bits_diff(s);
511
                    } else {
512
                        if(s->dquant){
513
                            put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
514
                            put_qscale(s);
515
                        }else{
516
                            put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
517
                        }
518
                        s->misc_bits+= get_bits_diff(s);
519
                        mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
520
                        mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
521
                        s->mv_bits+= get_bits_diff(s);
522
                    }
523
                } else {
524
                    put_bits(&s->pb, 3, 1); /* motion only */
525
                    if (!s->frame_pred_frame_dct)
526
                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
527
                    s->misc_bits+= get_bits_diff(s);
528
                    mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
529
                    mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
530
                    s->qscale -= s->dquant;
531
                    s->mv_bits+= get_bits_diff(s);
532
                }
533
                s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
534
                s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
535
            }else{
536
                assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
537

    
538
                if (cbp) {
539
                    if(s->dquant){
540
                        put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
541
                        put_qscale(s);
542
                    }else{
543
                        put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
544
                    }
545
                } else {
546
                    put_bits(&s->pb, 3, 1); /* motion only */
547
                    put_bits(&s->pb, 2, 1); /* motion_type: field */
548
                    s->qscale -= s->dquant;
549
                }
550
                s->misc_bits+= get_bits_diff(s);
551
                for(i=0; i<2; i++){
552
                    put_bits(&s->pb, 1, s->field_select[0][i]);
553
                    mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
554
                    mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
555
                    s->last_mv[0][i][0]=   s->mv[0][i][0];
556
                    s->last_mv[0][i][1]= 2*s->mv[0][i][1];
557
                }
558
                s->mv_bits+= get_bits_diff(s);
559
            }
560
            if(cbp) {
561
                if (s->chroma_y_shift) {
562
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
563
                } else {
564
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
565
                    put_sbits(&s->pb, 2, cbp);
566
                }
567
            }
568
            s->f_count++;
569
        } else{
570
            if(s->mv_type == MV_TYPE_16X16){
571
                if (cbp){    // With coded bloc pattern
572
                    if (s->dquant) {
573
                        if(s->mv_dir == MV_DIR_FORWARD)
574
                            put_mb_modes(s, 6, 3, 1, 0);
575
                        else
576
                            put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
577
                        put_qscale(s);
578
                    } else {
579
                        put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
580
                    }
581
                }else{    // No coded bloc pattern
582
                    put_bits(&s->pb, 5-s->mv_dir, 2);
583
                    if (!s->frame_pred_frame_dct)
584
                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
585
                    s->qscale -= s->dquant;
586
                }
587
                s->misc_bits += get_bits_diff(s);
588
                if (s->mv_dir&MV_DIR_FORWARD){
589
                    mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
590
                    mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
591
                    s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
592
                    s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
593
                    s->f_count++;
594
                }
595
                if (s->mv_dir&MV_DIR_BACKWARD){
596
                    mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
597
                    mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
598
                    s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
599
                    s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
600
                    s->b_count++;
601
                }
602
            }else{
603
                assert(s->mv_type == MV_TYPE_FIELD);
604
                assert(!s->frame_pred_frame_dct);
605
                if (cbp){    // With coded bloc pattern
606
                    if (s->dquant) {
607
                        if(s->mv_dir == MV_DIR_FORWARD)
608
                            put_mb_modes(s, 6, 3, 1, 1);
609
                        else
610
                            put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
611
                        put_qscale(s);
612
                    } else {
613
                        put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
614
                    }
615
                }else{    // No coded bloc pattern
616
                    put_bits(&s->pb, 5-s->mv_dir, 2);
617
                    put_bits(&s->pb, 2, 1); /* motion_type: field */
618
                    s->qscale -= s->dquant;
619
                }
620
                s->misc_bits += get_bits_diff(s);
621
                if (s->mv_dir&MV_DIR_FORWARD){
622
                    for(i=0; i<2; i++){
623
                        put_bits(&s->pb, 1, s->field_select[0][i]);
624
                        mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
625
                        mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
626
                        s->last_mv[0][i][0]=   s->mv[0][i][0];
627
                        s->last_mv[0][i][1]= 2*s->mv[0][i][1];
628
                    }
629
                    s->f_count++;
630
                }
631
                if (s->mv_dir&MV_DIR_BACKWARD){
632
                    for(i=0; i<2; i++){
633
                        put_bits(&s->pb, 1, s->field_select[1][i]);
634
                        mpeg1_encode_motion(s, s->mv[1][i][0] -  s->last_mv[1][i][0]    , s->b_code);
635
                        mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
636
                        s->last_mv[1][i][0]=   s->mv[1][i][0];
637
                        s->last_mv[1][i][1]= 2*s->mv[1][i][1];
638
                    }
639
                    s->b_count++;
640
                }
641
            }
642
            s->mv_bits += get_bits_diff(s);
643
            if(cbp) {
644
                if (s->chroma_y_shift) {
645
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
646
                } else {
647
                    put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
648
                    put_sbits(&s->pb, 2, cbp);
649
                }
650
            }
651
        }
652
        for(i=0;i<mb_block_count;i++) {
653
            if (cbp & (1 << (mb_block_count - 1 - i))) {
654
                mpeg1_encode_block(s, block[i], i);
655
            }
656
        }
657
        s->mb_skip_run = 0;
658
        if(s->mb_intra)
659
            s->i_tex_bits+= get_bits_diff(s);
660
        else
661
            s->p_tex_bits+= get_bits_diff(s);
662
    }
663
}
664

    
665
void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
666
{
667
    if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
668
    else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
669
}
670

    
671
// RAL: Parameter added: f_or_b_code
672
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
673
{
674
    if (val == 0) {
675
        /* zero vector */
676
        put_bits(&s->pb,
677
                 ff_mpeg12_mbMotionVectorTable[0][1],
678
                 ff_mpeg12_mbMotionVectorTable[0][0]);
679
    } else {
680
        int code, sign, bits;
681
        int bit_size = f_or_b_code - 1;
682
        int range = 1 << bit_size;
683
        /* modulo encoding */
684
        int l= INT_BIT - 5 - bit_size;
685
        val= (val<<l)>>l;
686

    
687
        if (val >= 0) {
688
            val--;
689
            code = (val >> bit_size) + 1;
690
            bits = val & (range - 1);
691
            sign = 0;
692
        } else {
693
            val = -val;
694
            val--;
695
            code = (val >> bit_size) + 1;
696
            bits = val & (range - 1);
697
            sign = 1;
698
        }
699

    
700
        assert(code > 0 && code <= 16);
701

    
702
        put_bits(&s->pb,
703
                 ff_mpeg12_mbMotionVectorTable[code][1],
704
                 ff_mpeg12_mbMotionVectorTable[code][0]);
705

    
706
        put_bits(&s->pb, 1, sign);
707
        if (bit_size > 0) {
708
            put_bits(&s->pb, bit_size, bits);
709
        }
710
    }
711
}
712

    
713
void ff_mpeg1_encode_init(MpegEncContext *s)
714
{
715
    static int done=0;
716

    
717
    ff_mpeg12_common_init(s);
718

    
719
    if(!done){
720
        int f_code;
721
        int mv;
722
        int i;
723

    
724
        done=1;
725
        init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
726
        init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
727

    
728
        for(i=0; i<64; i++)
729
        {
730
                mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
731
                mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
732
        }
733

    
734
        init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
735
        if(s->intra_vlc_format)
736
            init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
737

    
738
        /* build unified dc encoding tables */
739
        for(i=-255; i<256; i++)
740
        {
741
                int adiff, index;
742
                int bits, code;
743
                int diff=i;
744

    
745
                adiff = FFABS(diff);
746
                if(diff<0) diff--;
747
                index = av_log2(2*adiff);
748

    
749
                bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
750
                code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
751
                mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
752

    
753
                bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
754
                code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
755
                mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
756
        }
757

    
758
        for(f_code=1; f_code<=MAX_FCODE; f_code++){
759
            for(mv=-MAX_MV; mv<=MAX_MV; mv++){
760
                int len;
761

    
762
                if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
763
                else{
764
                    int val, bit_size, range, code;
765

    
766
                    bit_size = f_code - 1;
767
                    range = 1 << bit_size;
768

    
769
                    val=mv;
770
                    if (val < 0)
771
                        val = -val;
772
                    val--;
773
                    code = (val >> bit_size) + 1;
774
                    if(code<17){
775
                        len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
776
                    }else{
777
                        len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
778
                    }
779
                }
780

    
781
                mv_penalty[f_code][mv+MAX_MV]= len;
782
            }
783
        }
784

    
785

    
786
        for(f_code=MAX_FCODE; f_code>0; f_code--){
787
            for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
788
                fcode_tab[mv+MAX_MV]= f_code;
789
            }
790
        }
791
    }
792
    s->me.mv_penalty= mv_penalty;
793
    s->fcode_tab= fcode_tab;
794
    if(s->codec_id == CODEC_ID_MPEG1VIDEO){
795
        s->min_qcoeff=-255;
796
        s->max_qcoeff= 255;
797
    }else{
798
        s->min_qcoeff=-2047;
799
        s->max_qcoeff= 2047;
800
    }
801
    if (s->intra_vlc_format) {
802
        s->intra_ac_vlc_length=
803
        s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
804
    } else {
805
        s->intra_ac_vlc_length=
806
        s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
807
    }
808
    s->inter_ac_vlc_length=
809
    s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
810
}
811

    
812
static inline void encode_dc(MpegEncContext *s, int diff, int component)
813
{
814
  if(((unsigned) (diff+255)) >= 511){
815
        int index;
816

    
817
        if(diff<0){
818
            index= av_log2_16bit(-2*diff);
819
            diff--;
820
        }else{
821
            index= av_log2_16bit(2*diff);
822
        }
823
        if (component == 0) {
824
            put_bits(
825
                &s->pb,
826
                ff_mpeg12_vlc_dc_lum_bits[index] + index,
827
                (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
828
        }else{
829
            put_bits(
830
                &s->pb,
831
                ff_mpeg12_vlc_dc_chroma_bits[index] + index,
832
                (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
833
        }
834
  }else{
835
    if (component == 0) {
836
        put_bits(
837
            &s->pb,
838
            mpeg1_lum_dc_uni[diff+255]&0xFF,
839
            mpeg1_lum_dc_uni[diff+255]>>8);
840
    } else {
841
        put_bits(
842
            &s->pb,
843
            mpeg1_chr_dc_uni[diff+255]&0xFF,
844
            mpeg1_chr_dc_uni[diff+255]>>8);
845
    }
846
  }
847
}
848

    
849
static void mpeg1_encode_block(MpegEncContext *s,
850
                               DCTELEM *block,
851
                               int n)
852
{
853
    int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
854
    int code, component;
855
    const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
856

    
857
    last_index = s->block_last_index[n];
858

    
859
    /* DC coef */
860
    if (s->mb_intra) {
861
        component = (n <= 3 ? 0 : (n&1) + 1);
862
        dc = block[0]; /* overflow is impossible */
863
        diff = dc - s->last_dc[component];
864
        encode_dc(s, diff, component);
865
        s->last_dc[component] = dc;
866
        i = 1;
867
        if (s->intra_vlc_format)
868
            table_vlc = ff_rl_mpeg2.table_vlc;
869
    } else {
870
        /* encode the first coefficient : needs to be done here because
871
           it is handled slightly differently */
872
        level = block[0];
873
        if (abs(level) == 1) {
874
                code = ((uint32_t)level >> 31); /* the sign bit */
875
                put_bits(&s->pb, 2, code | 0x02);
876
                i = 1;
877
        } else {
878
            i = 0;
879
            last_non_zero = -1;
880
            goto next_coef;
881
        }
882
    }
883

    
884
    /* now quantify & encode AC coefs */
885
    last_non_zero = i - 1;
886

    
887
    for(;i<=last_index;i++) {
888
        j = s->intra_scantable.permutated[i];
889
        level = block[j];
890
    next_coef:
891
#if 0
892
        if (level != 0)
893
            av_dlog(s->avctx, "level[%d]=%d\n", i, level);
894
#endif
895
        /* encode using VLC */
896
        if (level != 0) {
897
            run = i - last_non_zero - 1;
898

    
899
            alevel= level;
900
            MASK_ABS(sign, alevel)
901
            sign&=1;
902

    
903
            if (alevel <= mpeg1_max_level[0][run]){
904
                code= mpeg1_index_run[0][run] + alevel - 1;
905
                /* store the vlc & sign at once */
906
                put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
907
            } else {
908
                /* escape seems to be pretty rare <5% so I do not optimize it */
909
                put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
910
                /* escape: only clip in this case */
911
                put_bits(&s->pb, 6, run);
912
                if(s->codec_id == CODEC_ID_MPEG1VIDEO){
913
                    if (alevel < 128) {
914
                        put_sbits(&s->pb, 8, level);
915
                    } else {
916
                        if (level < 0) {
917
                            put_bits(&s->pb, 16, 0x8001 + level + 255);
918
                        } else {
919
                            put_sbits(&s->pb, 16, level);
920
                        }
921
                    }
922
                }else{
923
                    put_sbits(&s->pb, 12, level);
924
                }
925
            }
926
            last_non_zero = i;
927
        }
928
    }
929
    /* end of block */
930
    put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
931
}
932

    
933
AVCodec ff_mpeg1video_encoder = {
934
    "mpeg1video",
935
    AVMEDIA_TYPE_VIDEO,
936
    CODEC_ID_MPEG1VIDEO,
937
    sizeof(MpegEncContext),
938
    encode_init,
939
    MPV_encode_picture,
940
    MPV_encode_end,
941
    .supported_framerates= ff_frame_rate_tab+1,
942
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
943
    .capabilities= CODEC_CAP_DELAY,
944
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
945
};
946

    
947
AVCodec ff_mpeg2video_encoder = {
948
    "mpeg2video",
949
    AVMEDIA_TYPE_VIDEO,
950
    CODEC_ID_MPEG2VIDEO,
951
    sizeof(MpegEncContext),
952
    encode_init,
953
    MPV_encode_picture,
954
    MPV_encode_end,
955
    .supported_framerates= ff_frame_rate_tab+1,
956
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
957
    .capabilities= CODEC_CAP_DELAY,
958
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
959
};