mpeg12enc: Don't set up run-level info for level 0.
[libav.git] / libavcodec / mpeg12enc.c
CommitLineData
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1/*
2 * MPEG1/2 encoder
406792e7 3 * Copyright (c) 2000,2001 Fabrice Bellard
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4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
2912e87a 6 * This file is part of Libav.
a6bc5731 7 *
2912e87a 8 * Libav is free software; you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
2912e87a 13 * Libav is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
2912e87a 19 * License along with Libav; if not, write to the Free Software
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20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23/**
ba87f080 24 * @file
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25 * MPEG1/2 encoder
26 */
27
28#include "avcodec.h"
29#include "dsputil.h"
2f329db9 30#include "mathops.h"
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31#include "mpegvideo.h"
32
33#include "mpeg12.h"
34#include "mpeg12data.h"
35#include "bytestream.h"
36
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37#include "libavutil/log.h"
38#include "libavutil/opt.h"
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39
40static const uint8_t inv_non_linear_qscale[13] = {
41 0, 2, 4, 6, 8,
42 9,10,11,12,13,14,15,16,
43};
44
45static const uint8_t svcd_scan_offset_placeholder[14] = {
46 0x10, 0x0E,
47 0x00, 0x80, 0x81,
48 0x00, 0x80, 0x81,
49 0xff, 0xff, 0xff,
50 0xff, 0xff, 0xff,
51};
52
53static void mpeg1_encode_block(MpegEncContext *s,
54 DCTELEM *block,
55 int component);
56static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
57
58static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
59static uint8_t fcode_tab[MAX_MV*2+1];
60
61static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
62static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
63
64/* simple include everything table for dc, first byte is bits number next 3 are code*/
65static uint32_t mpeg1_lum_dc_uni[512];
66static uint32_t mpeg1_chr_dc_uni[512];
67
68static uint8_t mpeg1_index_run[2][64];
69static int8_t mpeg1_max_level[2][64];
70
71static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
72 int i;
73
74 for(i=0; i<128; i++){
75 int level= i-64;
76 int run;
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77 if (!level)
78 continue;
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79 for(run=0; run<64; run++){
80 int len, bits, code;
81
82 int alevel= FFABS(level);
83 int sign= (level>>31)&1;
84
85 if (alevel > rl->max_level[0][run])
86 code= 111; /*rl->n*/
87 else
88 code= rl->index_run[0][run] + alevel - 1;
89
90 if (code < 111 /* rl->n */) {
91 /* store the vlc & sign at once */
92 len= rl->table_vlc[code][1]+1;
93 bits= (rl->table_vlc[code][0]<<1) + sign;
94 } else {
95 len= rl->table_vlc[111/*rl->n*/][1]+6;
96 bits= rl->table_vlc[111/*rl->n*/][0]<<6;
97
98 bits|= run;
99 if (alevel < 128) {
100 bits<<=8; len+=8;
101 bits|= level & 0xff;
102 } else {
103 bits<<=16; len+=16;
104 bits|= level & 0xff;
105 if (level < 0) {
106 bits|= 0x8001 + level + 255;
107 } else {
108 bits|= level & 0xffff;
109 }
110 }
111 }
112
113 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
114 }
115 }
116}
117
118
119static int find_frame_rate_index(MpegEncContext *s){
120 int i;
121 int64_t dmin= INT64_MAX;
122 int64_t d;
123
124 for(i=1;i<14;i++) {
9138a130 125 int64_t n0= 1001LL/avpriv_frame_rate_tab[i].den*avpriv_frame_rate_tab[i].num*s->avctx->time_base.num;
a6bc5731 126 int64_t n1= 1001LL*s->avctx->time_base.den;
2d525ef4 127 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
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128
129 d = FFABS(n0 - n1);
130 if(d < dmin){
131 dmin=d;
132 s->frame_rate_index= i;
133 }
134 }
135 if(dmin)
136 return -1;
137 else
138 return 0;
139}
140
98a6fff9 141static av_cold int encode_init(AVCodecContext *avctx)
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142{
143 MpegEncContext *s = avctx->priv_data;
144
145 if(MPV_encode_init(avctx) < 0)
146 return -1;
147
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148#if FF_API_MPEGVIDEO_GLOBAL_OPTS
149 if (avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)
150 s->drop_frame_timecode = 1;
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151 if (avctx->flags & CODEC_FLAG_SVCD_SCAN_OFFSET)
152 s->scan_offset = 1;
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153#endif
154
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155 if(find_frame_rate_index(s) < 0){
156 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
157 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
158 return -1;
159 }else{
160 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);
161 }
162 }
163
164 if(avctx->profile == FF_PROFILE_UNKNOWN){
165 if(avctx->level != FF_LEVEL_UNKNOWN){
166 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
167 return -1;
168 }
169 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
170 }
171
172 if(avctx->level == FF_LEVEL_UNKNOWN){
173 if(avctx->profile == 0){ /* 4:2:2 */
174 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
175 else avctx->level = 2; /* High */
176 }else{
177 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
178 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
179 return -1;
180 }
181 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
182 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
183 else avctx->level = 4; /* High */
184 }
185 }
186
2c5e1efc 187 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
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188 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
189 return -1;
190 }
191
192 return 0;
193}
194
195static void put_header(MpegEncContext *s, int header)
196{
9f51c682 197 avpriv_align_put_bits(&s->pb);
a6bc5731 198 put_bits(&s->pb, 16, header>>16);
6647ab80 199 put_sbits(&s->pb, 16, header);
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200}
201
202/* put sequence header if needed */
203static void mpeg1_encode_sequence_header(MpegEncContext *s)
204{
205 unsigned int vbv_buffer_size;
206 unsigned int fps, v;
207 int i;
208 uint64_t time_code;
209 float best_aspect_error= 1E10;
210 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
211 int constraint_parameter_flag;
212
213 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
214
657ccb5a 215 if (s->current_picture.f.key_frame) {
9138a130 216 AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index];
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217
218 /* mpeg1 header repeated every gop */
219 put_header(s, SEQ_START_CODE);
220
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221 put_sbits(&s->pb, 12, s->width );
222 put_sbits(&s->pb, 12, s->height);
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223
224 for(i=1; i<15; i++){
225 float error= aspect_ratio;
226 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
eaa7557c 227 error-= 1.0/ff_mpeg1_aspect[i];
a6bc5731 228 else
eaa7557c 229 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
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230
231 error= FFABS(error);
232
233 if(error < best_aspect_error){
234 best_aspect_error= error;
235 s->aspect_ratio_info= i;
236 }
237 }
238
239 put_bits(&s->pb, 4, s->aspect_ratio_info);
240 put_bits(&s->pb, 4, s->frame_rate_index);
241
242 if(s->avctx->rc_max_rate){
243 v = (s->avctx->rc_max_rate + 399) / 400;
244 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
245 v = 0x3ffff;
246 }else{
247 v= 0x3FFFF;
248 }
249
250 if(s->avctx->rc_buffer_size)
251 vbv_buffer_size = s->avctx->rc_buffer_size;
252 else
253 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
254 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
255 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
256
6647ab80 257 put_sbits(&s->pb, 18, v);
a6bc5731 258 put_bits(&s->pb, 1, 1); /* marker */
6647ab80 259 put_sbits(&s->pb, 10, vbv_buffer_size);
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260
261 constraint_parameter_flag=
262 s->width <= 768 && s->height <= 576 &&
263 s->mb_width * s->mb_height <= 396 &&
264 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
265 framerate.num <= framerate.den*30 &&
266 s->avctx->me_range && s->avctx->me_range < 128 &&
267 vbv_buffer_size <= 20 &&
268 v <= 1856000/400 &&
269 s->codec_id == CODEC_ID_MPEG1VIDEO;
270
271 put_bits(&s->pb, 1, constraint_parameter_flag);
272
273 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
274 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
275
276 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
277 put_header(s, EXT_START_CODE);
278 put_bits(&s->pb, 4, 1); //seq ext
279
280 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
281
282 put_bits(&s->pb, 3, s->avctx->profile); //profile
283 put_bits(&s->pb, 4, s->avctx->level); //level
284
285 put_bits(&s->pb, 1, s->progressive_sequence);
286 put_bits(&s->pb, 2, s->chroma_format);
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287 put_bits(&s->pb, 2, s->width >>12);
288 put_bits(&s->pb, 2, s->height>>12);
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289 put_bits(&s->pb, 12, v>>18); //bitrate ext
290 put_bits(&s->pb, 1, 1); //marker
291 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
292 put_bits(&s->pb, 1, s->low_delay);
293 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
294 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
295 }
296
297 put_header(s, GOP_START_CODE);
2c5e1efc 298 put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
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299 /* time code : we must convert from the real frame rate to a
300 fake mpeg frame rate in case of low frame rate */
301 fps = (framerate.num + framerate.den/2)/ framerate.den;
657ccb5a 302 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
a6bc5731 303
657ccb5a 304 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
2c5e1efc 305 if (s->drop_frame_timecode) {
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306 /* only works for NTSC 29.97 */
307 int d = time_code / 17982;
308 int m = time_code % 17982;
309 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
310 time_code += 18 * d + 2 * ((m - 2) / 1798);
311 }
312 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
313 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
314 put_bits(&s->pb, 1, 1);
315 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
316 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
317 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
318 put_bits(&s->pb, 1, 0); /* broken link */
319 }
320}
321
322static inline void encode_mb_skip_run(MpegEncContext *s, int run){
323 while (run >= 33) {
324 put_bits(&s->pb, 11, 0x008);
325 run -= 33;
326 }
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327 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
328 ff_mpeg12_mbAddrIncrTable[run][0]);
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329}
330
331static av_always_inline void put_qscale(MpegEncContext *s)
332{
333 if(s->q_scale_type){
334 assert(s->qscale>=1 && s->qscale <=12);
335 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
336 }else{
337 put_bits(&s->pb, 5, s->qscale);
338 }
339}
340
341void ff_mpeg1_encode_slice_header(MpegEncContext *s){
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342 if (s->height > 2800) {
343 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
344 put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
345 } else {
7a38c114 346 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
4410adf1 347 }
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348 put_qscale(s);
349 put_bits(&s->pb, 1, 0); /* slice extra information */
350}
351
352void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
353{
354 mpeg1_encode_sequence_header(s);
355
356 /* mpeg1 picture header */
357 put_header(s, PICTURE_START_CODE);
358 /* temporal reference */
359
360 // RAL: s->picture_number instead of s->fake_picture_number
361 put_bits(&s->pb, 10, (s->picture_number -
362 s->gop_picture_number) & 0x3ff);
363 put_bits(&s->pb, 3, s->pict_type);
364
365 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
366 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
367
368 // RAL: Forward f_code also needed for B frames
975a1447 369 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
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370 put_bits(&s->pb, 1, 0); /* half pel coordinates */
371 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
372 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
373 else
374 put_bits(&s->pb, 3, 7); /* forward_f_code */
375 }
376
377 // RAL: Backward f_code necessary for B frames
975a1447 378 if (s->pict_type == AV_PICTURE_TYPE_B) {
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379 put_bits(&s->pb, 1, 0); /* half pel coordinates */
380 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
381 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
382 else
383 put_bits(&s->pb, 3, 7); /* backward_f_code */
384 }
385
386 put_bits(&s->pb, 1, 0); /* extra bit picture */
387
388 s->frame_pred_frame_dct = 1;
389 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
390 put_header(s, EXT_START_CODE);
391 put_bits(&s->pb, 4, 8); //pic ext
975a1447 392 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
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393 put_bits(&s->pb, 4, s->f_code);
394 put_bits(&s->pb, 4, s->f_code);
395 }else{
396 put_bits(&s->pb, 8, 255);
397 }
975a1447 398 if (s->pict_type == AV_PICTURE_TYPE_B) {
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399 put_bits(&s->pb, 4, s->b_code);
400 put_bits(&s->pb, 4, s->b_code);
401 }else{
402 put_bits(&s->pb, 8, 255);
403 }
404 put_bits(&s->pb, 2, s->intra_dc_precision);
405
406 assert(s->picture_structure == PICT_FRAME);
407 put_bits(&s->pb, 2, s->picture_structure);
408 if (s->progressive_sequence) {
409 put_bits(&s->pb, 1, 0); /* no repeat */
410 } else {
657ccb5a 411 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
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412 }
413 /* XXX: optimize the generation of this flag with entropy
414 measures */
415 s->frame_pred_frame_dct = s->progressive_sequence;
416
417 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
418 put_bits(&s->pb, 1, s->concealment_motion_vectors);
419 put_bits(&s->pb, 1, s->q_scale_type);
420 put_bits(&s->pb, 1, s->intra_vlc_format);
421 put_bits(&s->pb, 1, s->alternate_scan);
422 put_bits(&s->pb, 1, s->repeat_first_field);
423 s->progressive_frame = s->progressive_sequence;
424 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
425 put_bits(&s->pb, 1, s->progressive_frame);
426 put_bits(&s->pb, 1, 0); //composite_display_flag
427 }
aed79007 428 if (s->scan_offset) {
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429 int i;
430
431 put_header(s, USER_START_CODE);
432 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
433 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
434 }
435 }
436
437 s->mb_y=0;
438 ff_mpeg1_encode_slice_header(s);
439}
440
441static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
442 int has_mv, int field_motion)
443{
444 put_bits(&s->pb, n, bits);
445 if (!s->frame_pred_frame_dct) {
446 if (has_mv)
447 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
448 put_bits(&s->pb, 1, s->interlaced_dct);
449 }
450}
451
452static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
453 DCTELEM block[6][64],
454 int motion_x, int motion_y,
455 int mb_block_count)
456{
457 int i, cbp;
458 const int mb_x = s->mb_x;
459 const int mb_y = s->mb_y;
460 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
461
462 /* compute cbp */
463 cbp = 0;
464 for(i=0;i<mb_block_count;i++) {
465 if (s->block_last_index[i] >= 0)
466 cbp |= 1 << (mb_block_count - 1 - i);
467 }
468
469 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
470 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
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471 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
472 (s->pict_type == AV_PICTURE_TYPE_B && 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) |
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473 ((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))) {
474 s->mb_skip_run++;
475 s->qscale -= s->dquant;
476 s->skip_count++;
477 s->misc_bits++;
478 s->last_bits++;
975a1447 479 if(s->pict_type == AV_PICTURE_TYPE_P){
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480 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
481 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
482 }
483 } else {
484 if(first_mb){
485 assert(s->mb_skip_run == 0);
486 encode_mb_skip_run(s, s->mb_x);
487 }else{
488 encode_mb_skip_run(s, s->mb_skip_run);
489 }
490
975a1447 491 if (s->pict_type == AV_PICTURE_TYPE_I) {
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492 if(s->dquant && cbp){
493 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
494 put_qscale(s);
495 }else{
496 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
497 s->qscale -= s->dquant;
498 }
499 s->misc_bits+= get_bits_diff(s);
500 s->i_count++;
501 } else if (s->mb_intra) {
502 if(s->dquant && cbp){
503 put_mb_modes(s, 6, 0x01, 0, 0);
504 put_qscale(s);
505 }else{
506 put_mb_modes(s, 5, 0x03, 0, 0);
507 s->qscale -= s->dquant;
508 }
509 s->misc_bits+= get_bits_diff(s);
510 s->i_count++;
511 memset(s->last_mv, 0, sizeof(s->last_mv));
975a1447 512 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
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513 if(s->mv_type == MV_TYPE_16X16){
514 if (cbp != 0) {
515 if ((motion_x|motion_y) == 0) {
516 if(s->dquant){
517 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
518 put_qscale(s);
519 }else{
520 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
521 }
522 s->misc_bits+= get_bits_diff(s);
523 } else {
524 if(s->dquant){
525 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
526 put_qscale(s);
527 }else{
528 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
529 }
530 s->misc_bits+= get_bits_diff(s);
531 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
532 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
533 s->mv_bits+= get_bits_diff(s);
534 }
535 } else {
536 put_bits(&s->pb, 3, 1); /* motion only */
537 if (!s->frame_pred_frame_dct)
538 put_bits(&s->pb, 2, 2); /* motion_type: frame */
539 s->misc_bits+= get_bits_diff(s);
540 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
541 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
542 s->qscale -= s->dquant;
543 s->mv_bits+= get_bits_diff(s);
544 }
545 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
546 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
547 }else{
548 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
549
550 if (cbp) {
551 if(s->dquant){
552 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
553 put_qscale(s);
554 }else{
555 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
556 }
557 } else {
558 put_bits(&s->pb, 3, 1); /* motion only */
559 put_bits(&s->pb, 2, 1); /* motion_type: field */
560 s->qscale -= s->dquant;
561 }
562 s->misc_bits+= get_bits_diff(s);
563 for(i=0; i<2; i++){
564 put_bits(&s->pb, 1, s->field_select[0][i]);
565 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
566 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
567 s->last_mv[0][i][0]= s->mv[0][i][0];
568 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
569 }
570 s->mv_bits+= get_bits_diff(s);
571 }
572 if(cbp) {
573 if (s->chroma_y_shift) {
eaa7557c 574 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
a6bc5731 575 } else {
eaa7557c 576 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
6647ab80 577 put_sbits(&s->pb, 2, cbp);
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578 }
579 }
580 s->f_count++;
581 } else{
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582 if(s->mv_type == MV_TYPE_16X16){
583 if (cbp){ // With coded bloc pattern
584 if (s->dquant) {
585 if(s->mv_dir == MV_DIR_FORWARD)
586 put_mb_modes(s, 6, 3, 1, 0);
587 else
2f446d38 588 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
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589 put_qscale(s);
590 } else {
2f446d38 591 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
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592 }
593 }else{ // No coded bloc pattern
2f446d38 594 put_bits(&s->pb, 5-s->mv_dir, 2);
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595 if (!s->frame_pred_frame_dct)
596 put_bits(&s->pb, 2, 2); /* motion_type: frame */
597 s->qscale -= s->dquant;
598 }
599 s->misc_bits += get_bits_diff(s);
600 if (s->mv_dir&MV_DIR_FORWARD){
601 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
602 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
603 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
604 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
605 s->f_count++;
606 }
607 if (s->mv_dir&MV_DIR_BACKWARD){
608 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
609 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
610 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
611 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
612 s->b_count++;
613 }
614 }else{
615 assert(s->mv_type == MV_TYPE_FIELD);
616 assert(!s->frame_pred_frame_dct);
617 if (cbp){ // With coded bloc pattern
618 if (s->dquant) {
619 if(s->mv_dir == MV_DIR_FORWARD)
620 put_mb_modes(s, 6, 3, 1, 1);
621 else
2f446d38 622 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
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623 put_qscale(s);
624 } else {
2f446d38 625 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
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626 }
627 }else{ // No coded bloc pattern
2f446d38 628 put_bits(&s->pb, 5-s->mv_dir, 2);
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629 put_bits(&s->pb, 2, 1); /* motion_type: field */
630 s->qscale -= s->dquant;
631 }
632 s->misc_bits += get_bits_diff(s);
633 if (s->mv_dir&MV_DIR_FORWARD){
634 for(i=0; i<2; i++){
635 put_bits(&s->pb, 1, s->field_select[0][i]);
636 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
637 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
638 s->last_mv[0][i][0]= s->mv[0][i][0];
639 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
640 }
641 s->f_count++;
642 }
643 if (s->mv_dir&MV_DIR_BACKWARD){
644 for(i=0; i<2; i++){
645 put_bits(&s->pb, 1, s->field_select[1][i]);
646 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
647 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
648 s->last_mv[1][i][0]= s->mv[1][i][0];
649 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
650 }
651 s->b_count++;
652 }
653 }
654 s->mv_bits += get_bits_diff(s);
655 if(cbp) {
656 if (s->chroma_y_shift) {
eaa7557c 657 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
a6bc5731 658 } else {
eaa7557c 659 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
6647ab80 660 put_sbits(&s->pb, 2, cbp);
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661 }
662 }
663 }
664 for(i=0;i<mb_block_count;i++) {
665 if (cbp & (1 << (mb_block_count - 1 - i))) {
666 mpeg1_encode_block(s, block[i], i);
667 }
668 }
669 s->mb_skip_run = 0;
670 if(s->mb_intra)
671 s->i_tex_bits+= get_bits_diff(s);
672 else
673 s->p_tex_bits+= get_bits_diff(s);
674 }
675}
676
677void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
678{
679 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
680 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
681}
682
683// RAL: Parameter added: f_or_b_code
684static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
685{
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686 if (val == 0) {
687 /* zero vector */
a6bc5731 688 put_bits(&s->pb,
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689 ff_mpeg12_mbMotionVectorTable[0][1],
690 ff_mpeg12_mbMotionVectorTable[0][0]);
a6bc5731 691 } else {
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692 int code, sign, bits;
693 int bit_size = f_or_b_code - 1;
694 int range = 1 << bit_size;
a6bc5731 695 /* modulo encoding */
2f329db9 696 val = sign_extend(val, 5 + bit_size);
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697
698 if (val >= 0) {
699 val--;
700 code = (val >> bit_size) + 1;
701 bits = val & (range - 1);
702 sign = 0;
703 } else {
704 val = -val;
705 val--;
706 code = (val >> bit_size) + 1;
707 bits = val & (range - 1);
708 sign = 1;
709 }
710
711 assert(code > 0 && code <= 16);
712
713 put_bits(&s->pb,
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714 ff_mpeg12_mbMotionVectorTable[code][1],
715 ff_mpeg12_mbMotionVectorTable[code][0]);
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716
717 put_bits(&s->pb, 1, sign);
718 if (bit_size > 0) {
719 put_bits(&s->pb, bit_size, bits);
720 }
721 }
722}
723
724void ff_mpeg1_encode_init(MpegEncContext *s)
725{
726 static int done=0;
727
eaa7557c 728 ff_mpeg12_common_init(s);
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729
730 if(!done){
731 int f_code;
732 int mv;
733 int i;
734
735 done=1;
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736 init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
737 init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
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738
739 for(i=0; i<64; i++)
740 {
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741 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
742 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
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743 }
744
eaa7557c 745 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
a6bc5731 746 if(s->intra_vlc_format)
eaa7557c 747 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
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748
749 /* build unified dc encoding tables */
750 for(i=-255; i<256; i++)
751 {
752 int adiff, index;
753 int bits, code;
754 int diff=i;
755
756 adiff = FFABS(diff);
757 if(diff<0) diff--;
758 index = av_log2(2*adiff);
759
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760 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
761 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
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762 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
763
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764 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
765 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
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766 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
767 }
768
769 for(f_code=1; f_code<=MAX_FCODE; f_code++){
770 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
771 int len;
772
eaa7557c 773 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
a6bc5731 774 else{
e65ab9d9 775 int val, bit_size, code;
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776
777 bit_size = f_code - 1;
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778
779 val=mv;
780 if (val < 0)
781 val = -val;
782 val--;
783 code = (val >> bit_size) + 1;
784 if(code<17){
eaa7557c 785 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
a6bc5731 786 }else{
eaa7557c 787 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
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788 }
789 }
790
791 mv_penalty[f_code][mv+MAX_MV]= len;
792 }
793 }
794
795
796 for(f_code=MAX_FCODE; f_code>0; f_code--){
797 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
798 fcode_tab[mv+MAX_MV]= f_code;
799 }
800 }
801 }
802 s->me.mv_penalty= mv_penalty;
803 s->fcode_tab= fcode_tab;
804 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
805 s->min_qcoeff=-255;
806 s->max_qcoeff= 255;
807 }else{
808 s->min_qcoeff=-2047;
809 s->max_qcoeff= 2047;
810 }
811 if (s->intra_vlc_format) {
812 s->intra_ac_vlc_length=
813 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
814 } else {
815 s->intra_ac_vlc_length=
816 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
817 }
818 s->inter_ac_vlc_length=
819 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
820}
821
822static inline void encode_dc(MpegEncContext *s, int diff, int component)
823{
824 if(((unsigned) (diff+255)) >= 511){
825 int index;
826
827 if(diff<0){
828 index= av_log2_16bit(-2*diff);
829 diff--;
830 }else{
831 index= av_log2_16bit(2*diff);
832 }
833 if (component == 0) {
834 put_bits(
835 &s->pb,
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836 ff_mpeg12_vlc_dc_lum_bits[index] + index,
837 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
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838 }else{
839 put_bits(
840 &s->pb,
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841 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
842 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
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843 }
844 }else{
845 if (component == 0) {
846 put_bits(
847 &s->pb,
848 mpeg1_lum_dc_uni[diff+255]&0xFF,
849 mpeg1_lum_dc_uni[diff+255]>>8);
850 } else {
851 put_bits(
852 &s->pb,
853 mpeg1_chr_dc_uni[diff+255]&0xFF,
854 mpeg1_chr_dc_uni[diff+255]>>8);
855 }
856 }
857}
858
859static void mpeg1_encode_block(MpegEncContext *s,
860 DCTELEM *block,
861 int n)
862{
863 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
864 int code, component;
eaa7557c 865 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
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866
867 last_index = s->block_last_index[n];
868
869 /* DC coef */
870 if (s->mb_intra) {
871 component = (n <= 3 ? 0 : (n&1) + 1);
872 dc = block[0]; /* overflow is impossible */
873 diff = dc - s->last_dc[component];
874 encode_dc(s, diff, component);
875 s->last_dc[component] = dc;
876 i = 1;
877 if (s->intra_vlc_format)
eaa7557c 878 table_vlc = ff_rl_mpeg2.table_vlc;
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879 } else {
880 /* encode the first coefficient : needs to be done here because
881 it is handled slightly differently */
882 level = block[0];
883 if (abs(level) == 1) {
884 code = ((uint32_t)level >> 31); /* the sign bit */
885 put_bits(&s->pb, 2, code | 0x02);
886 i = 1;
887 } else {
888 i = 0;
889 last_non_zero = -1;
890 goto next_coef;
891 }
892 }
893
894 /* now quantify & encode AC coefs */
895 last_non_zero = i - 1;
896
897 for(;i<=last_index;i++) {
898 j = s->intra_scantable.permutated[i];
899 level = block[j];
900 next_coef:
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901 /* encode using VLC */
902 if (level != 0) {
903 run = i - last_non_zero - 1;
904
905 alevel= level;
906 MASK_ABS(sign, alevel)
907 sign&=1;
908
909 if (alevel <= mpeg1_max_level[0][run]){
910 code= mpeg1_index_run[0][run] + alevel - 1;
911 /* store the vlc & sign at once */
912 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
913 } else {
914 /* escape seems to be pretty rare <5% so I do not optimize it */
915 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
916 /* escape: only clip in this case */
917 put_bits(&s->pb, 6, run);
918 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
919 if (alevel < 128) {
6647ab80 920 put_sbits(&s->pb, 8, level);
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921 } else {
922 if (level < 0) {
923 put_bits(&s->pb, 16, 0x8001 + level + 255);
924 } else {
6647ab80 925 put_sbits(&s->pb, 16, level);
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926 }
927 }
928 }else{
6647ab80 929 put_sbits(&s->pb, 12, level);
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930 }
931 }
932 last_non_zero = i;
933 }
934 }
935 /* end of block */
936 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
937}
938
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939#define OFFSET(x) offsetof(MpegEncContext, x)
940#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
88262ca8 941#define COMMON_OPTS\
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942 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },\
943 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE}, \
944 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
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945
946static const AVOption mpeg1_options[] = {
947 COMMON_OPTS
948 { NULL },
949};
950
951static const AVOption mpeg2_options[] = {
952 COMMON_OPTS
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953 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
954 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
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955 { NULL },
956};
957
958#define mpeg12_class(x)\
959static const AVClass mpeg## x ##_class = {\
960 .class_name = "mpeg" #x "video encoder",\
961 .item_name = av_default_item_name,\
88262ca8 962 .option = mpeg## x ##_options,\
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963 .version = LIBAVUTIL_VERSION_INT,\
964};
965
966mpeg12_class(1)
967mpeg12_class(2)
968
d36beb3f 969AVCodec ff_mpeg1video_encoder = {
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970 .name = "mpeg1video",
971 .type = AVMEDIA_TYPE_VIDEO,
972 .id = CODEC_ID_MPEG1VIDEO,
973 .priv_data_size = sizeof(MpegEncContext),
974 .init = encode_init,
975 .encode = MPV_encode_picture,
976 .close = MPV_encode_end,
9138a130 977 .supported_framerates= avpriv_frame_rate_tab+1,
2ba83017 978 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
94f7451a 979 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
fe4bf374 980 .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
297d9cb3 981 .priv_class = &mpeg1_class,
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982};
983
d36beb3f 984AVCodec ff_mpeg2video_encoder = {
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985 .name = "mpeg2video",
986 .type = AVMEDIA_TYPE_VIDEO,
987 .id = CODEC_ID_MPEG2VIDEO,
988 .priv_data_size = sizeof(MpegEncContext),
989 .init = encode_init,
990 .encode = MPV_encode_picture,
991 .close = MPV_encode_end,
9138a130 992 .supported_framerates= avpriv_frame_rate_tab+1,
2ba83017 993 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
94f7451a 994 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
fe4bf374 995 .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
297d9cb3 996 .priv_class = &mpeg2_class,
a6bc5731 997};