FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12enc.c
Date: 2022-07-04 00:18:54
Exec Total Coverage
Lines: 596 685 87.0%
Branches: 321 411 78.1%

Line Branch Exec Source
1 /*
2 * MPEG-1/2 encoder
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
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 *
13 * 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
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * MPEG-1/2 encoder
26 */
27
28 #include <stdint.h>
29
30 #include "config.h"
31 #include "config_components.h"
32 #include "libavutil/attributes.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/log.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/thread.h"
37 #include "libavutil/timecode.h"
38 #include "libavutil/stereo3d.h"
39
40 #include "avcodec.h"
41 #include "codec_internal.h"
42 #include "mathops.h"
43 #include "mpeg12.h"
44 #include "mpeg12data.h"
45 #include "mpeg12enc.h"
46 #include "mpegutils.h"
47 #include "mpegvideo.h"
48 #include "mpegvideoenc.h"
49 #include "profiles.h"
50
51 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
52 static const uint8_t svcd_scan_offset_placeholder[] = {
53 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
54 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
55 };
56
57 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
58 static uint8_t fcode_tab[MAX_MV * 2 + 1];
59
60 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
61 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
62
63 /* simple include everything table for dc, first byte is bits
64 * number next 3 are code */
65 static uint32_t mpeg1_lum_dc_uni[512];
66 static uint32_t mpeg1_chr_dc_uni[512];
67
68 typedef struct MPEG12EncContext {
69 MpegEncContext mpeg;
70 AVRational frame_rate_ext;
71 unsigned frame_rate_index;
72
73 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num
74
75 int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
76 AVTimecode tc; ///< timecode context
77 char *tc_opt_str; ///< timecode option string
78 int drop_frame_timecode; ///< timecode is in drop frame format.
79 int scan_offset; ///< reserve space for SVCD scan offset user data.
80
81 int a53_cc;
82 int seq_disp_ext;
83 int video_format;
84 } MPEG12EncContext;
85
86 #define A53_MAX_CC_COUNT 0x1f
87 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
88
89 100 av_cold void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len)
90 {
91 int i;
92
93
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12900 for (i = 0; i < 128; i++) {
94 12800 int level = i - 64;
95 int run;
96
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12800 if (!level)
97 100 continue;
98
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825500 for (run = 0; run < 64; run++) {
99 int len, code;
100 812800 int alevel = FFABS(level);
101
102
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812800 if (alevel > rl->max_level[0][run])
103 790600 code = 111; /* rl->n */
104 else
105 22200 code = rl->index_run[0][run] + alevel - 1;
106
107
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812800 if (code < 111) { /* rl->n */
108 /* length of VLC and sign */
109 22200 len = rl->table_vlc[code][1] + 1;
110 } else {
111 790600 len = rl->table_vlc[111 /* rl->n */][1] + 6;
112
113
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790600 if (alevel < 128)
114 790600 len += 8;
115 else
116 len += 16;
117 }
118
119 812800 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
120 }
121 }
122 100 }
123
124 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
125 50 static int find_frame_rate_index(MPEG12EncContext *mpeg12)
126 {
127 50 MpegEncContext *const s = &mpeg12->mpeg;
128 int i;
129 50 AVRational bestq = (AVRational) {0, 0};
130 AVRational ext;
131 50 AVRational target = av_inv_q(s->avctx->time_base);
132
133
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450 for (i = 1; i < 14; i++) {
134
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450 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
135 i >= 9)
136 50 break;
137
138
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2000 for (ext.num=1; ext.num <= 4; ext.num++) {
139
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52800 for (ext.den=1; ext.den <= 32; ext.den++) {
140 51200 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
141
142
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51200 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
143 24280 continue;
144
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40024 if (av_gcd(ext.den, ext.num) != 1)
145 13104 continue;
146
147
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26920 if ( bestq.num==0
148
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26870 || av_nearer_q(target, bestq, q) < 0
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26767 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
150 153 bestq = q;
151 153 mpeg12->frame_rate_index = i;
152 153 mpeg12->frame_rate_ext.num = ext.num;
153 153 mpeg12->frame_rate_ext.den = ext.den;
154 }
155 }
156 }
157 }
158
159
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50 if (av_cmp_q(target, bestq))
160 return -1;
161 else
162 50 return 0;
163 }
164
165 50 static av_cold int encode_init(AVCodecContext *avctx)
166 {
167 50 MPEG12EncContext *const mpeg12 = avctx->priv_data;
168 50 MpegEncContext *const s = &mpeg12->mpeg;
169 int ret;
170
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50 int max_size = avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ? 16383 : 4095;
171
172
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50 if (avctx->width > max_size || avctx->height > max_size) {
173 av_log(avctx, AV_LOG_ERROR, "%s does not support resolutions above %dx%d\n",
174 CONFIG_SMALL ? avctx->codec->name : avctx->codec->long_name,
175 max_size, max_size);
176 return AVERROR(EINVAL);
177 }
178
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50 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
179 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
180 return AVERROR(EINVAL);
181 }
182
183
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50 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
184
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50 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
185 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
186 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
187 return AVERROR(EINVAL);
188 }
189 }
190
191
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50 if (avctx->profile == FF_PROFILE_UNKNOWN) {
192
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50 if (avctx->level != FF_LEVEL_UNKNOWN) {
193 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
194 return AVERROR(EINVAL);
195 }
196 /* Main or 4:2:2 */
197 50 avctx->profile = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? FF_PROFILE_MPEG2_MAIN
198
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50 : FF_PROFILE_MPEG2_422;
199 }
200
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50 if (avctx->level == FF_LEVEL_UNKNOWN) {
201
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50 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
202
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5 if (avctx->width <= 720 && avctx->height <= 608)
203 5 avctx->level = 5; /* Main */
204 else
205 avctx->level = 2; /* High */
206 } else {
207
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45 if (avctx->profile != FF_PROFILE_MPEG2_HIGH &&
208
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45 avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
209 av_log(avctx, AV_LOG_ERROR,
210 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
211 return AVERROR(EINVAL);
212 }
213
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45 if (avctx->width <= 720 && avctx->height <= 576)
214 44 avctx->level = 8; /* Main */
215
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1 else if (avctx->width <= 1440)
216 1 avctx->level = 6; /* High 1440 */
217 else
218 avctx->level = 4; /* High */
219 }
220 }
221
222
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50 if ((ret = ff_mpv_encode_init(avctx)) < 0)
223 return ret;
224
225
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50 if (find_frame_rate_index(mpeg12) < 0) {
226 if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
227 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
228 avctx->time_base.den, avctx->time_base.num);
229 return AVERROR(EINVAL);
230 } else {
231 av_log(avctx, AV_LOG_INFO,
232 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
233 avctx->time_base.den, avctx->time_base.num);
234 }
235 }
236
237
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50 mpeg12->drop_frame_timecode = mpeg12->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
238
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50 if (mpeg12->drop_frame_timecode)
239 mpeg12->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
240
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50 if (mpeg12->drop_frame_timecode && mpeg12->frame_rate_index != 4) {
241 av_log(avctx, AV_LOG_ERROR,
242 "Drop frame time code only allowed with 1001/30000 fps\n");
243 return AVERROR(EINVAL);
244 }
245
246
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50 if (mpeg12->tc_opt_str) {
247 6 AVRational rate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
248 6 int ret = av_timecode_init_from_string(&mpeg12->tc, rate, mpeg12->tc_opt_str, s);
249
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6 if (ret < 0)
250 return ret;
251 6 mpeg12->drop_frame_timecode = !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
252 6 mpeg12->timecode_frame_start = mpeg12->tc.start;
253 } else {
254 44 mpeg12->timecode_frame_start = 0; // default is -1
255 }
256
257 50 return 0;
258 }
259
260 298633 static void put_header(MpegEncContext *s, int header)
261 {
262 298633 align_put_bits(&s->pb);
263 298633 put_bits(&s->pb, 16, header >> 16);
264 298633 put_sbits(&s->pb, 16, header);
265 298633 }
266
267 /* put sequence header if needed */
268 2370 static void mpeg1_encode_sequence_header(MpegEncContext *s)
269 {
270 2370 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
271 unsigned int vbv_buffer_size, fps, v;
272 int constraint_parameter_flag;
273 2370 AVRational framerate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
274 uint64_t time_code;
275 2370 int64_t best_aspect_error = INT64_MAX;
276 2370 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
277 int aspect_ratio_info;
278
279
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2370 if (!s->current_picture.f->key_frame)
280 1978 return;
281
282
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392 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
283 389 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
284
285 /* MPEG-1 header repeated every GOP */
286 392 put_header(s, SEQ_START_CODE);
287
288 392 put_sbits(&s->pb, 12, s->width & 0xFFF);
289 392 put_sbits(&s->pb, 12, s->height & 0xFFF);
290
291
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5880 for (int i = 1; i < 15; i++) {
292 5488 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
293
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5488 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
294 1081 error -= (1LL<<32) / ff_mpeg1_aspect[i];
295 else
296 4407 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
297
298 5488 error = FFABS(error);
299
300
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5488 if (error - 2 <= best_aspect_error) {
301 395 best_aspect_error = error;
302 395 aspect_ratio_info = i;
303 }
304 }
305
306 392 put_bits(&s->pb, 4, aspect_ratio_info);
307 392 put_bits(&s->pb, 4, mpeg12->frame_rate_index);
308
309
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392 if (s->avctx->rc_max_rate) {
310 153 v = (s->avctx->rc_max_rate + 399) / 400;
311
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153 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
312 v = 0x3ffff;
313 } else {
314 239 v = 0x3FFFF;
315 }
316
317
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392 if (s->avctx->rc_buffer_size)
318 153 vbv_buffer_size = s->avctx->rc_buffer_size;
319 else
320 /* VBV calculation: Scaled so that a VCD has the proper
321 * VBV size of 40 kilobytes */
322 239 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
323 392 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
324
325 392 put_sbits(&s->pb, 18, v);
326 392 put_bits(&s->pb, 1, 1); // marker
327 392 put_sbits(&s->pb, 10, vbv_buffer_size);
328
329 392 constraint_parameter_flag =
330 781 s->width <= 768 &&
331
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389 s->height <= 576 &&
332
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239 s->mb_width * s->mb_height <= 396 &&
333
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221 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
334
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215 framerate.num <= framerate.den * 30 &&
335
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215 s->avctx->me_range &&
336 s->avctx->me_range < 128 &&
337 vbv_buffer_size <= 20 &&
338
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781 v <= 1856000 / 400 &&
339 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
340
341 392 put_bits(&s->pb, 1, constraint_parameter_flag);
342
343 392 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
344 392 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
345
346
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392 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
347 const AVFrameSideData *side_data;
348 339 int width = s->width;
349 339 int height = s->height;
350 int use_seq_disp_ext;
351
352 339 put_header(s, EXT_START_CODE);
353 339 put_bits(&s->pb, 4, 1); // seq ext
354
355 339 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
356
357 339 put_bits(&s->pb, 3, s->avctx->profile); // profile
358 339 put_bits(&s->pb, 4, s->avctx->level); // level
359
360 339 put_bits(&s->pb, 1, s->progressive_sequence);
361 339 put_bits(&s->pb, 2, s->chroma_format);
362 339 put_bits(&s->pb, 2, s->width >> 12);
363 339 put_bits(&s->pb, 2, s->height >> 12);
364 339 put_bits(&s->pb, 12, v >> 18); // bitrate ext
365 339 put_bits(&s->pb, 1, 1); // marker
366 339 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
367 339 put_bits(&s->pb, 1, s->low_delay);
368 339 put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
369 339 put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
370
371 339 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
372
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339 if (side_data) {
373 const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
374 if (pan_scan->width && pan_scan->height) {
375 width = pan_scan->width >> 4;
376 height = pan_scan->height >> 4;
377 }
378 }
379
380 1017 use_seq_disp_ext = (width != s->width ||
381
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339 height != s->height ||
382
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339 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
383
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330 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
384
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1005 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
385
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327 mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
386
387
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339 if (mpeg12->seq_disp_ext == 1 ||
388
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339 (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
389 12 put_header(s, EXT_START_CODE);
390 12 put_bits(&s->pb, 4, 2); // sequence display extension
391 12 put_bits(&s->pb, 3, mpeg12->video_format); // video_format
392 12 put_bits(&s->pb, 1, 1); // colour_description
393 12 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
394 12 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
395 12 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
396 12 put_bits(&s->pb, 14, width); // display_horizontal_size
397 12 put_bits(&s->pb, 1, 1); // marker_bit
398 12 put_bits(&s->pb, 14, height); // display_vertical_size
399 12 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
400 }
401 }
402
403 392 put_header(s, GOP_START_CODE);
404 392 put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
405 /* time code: we must convert from the real frame rate to a
406 * fake MPEG frame rate in case of low frame rate */
407 392 fps = (framerate.num + framerate.den / 2) / framerate.den;
408 392 time_code = s->current_picture_ptr->f->coded_picture_number +
409 392 mpeg12->timecode_frame_start;
410
411 392 mpeg12->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
412
413
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392 av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
414
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392 if (mpeg12->drop_frame_timecode)
415 9 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
416
417 392 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
418 392 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
419 392 put_bits(&s->pb, 1, 1);
420 392 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
421 392 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
422 392 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) ||
423
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392 s->intra_only || !mpeg12->gop_picture_number);
424 392 put_bits(&s->pb, 1, 0); // broken link
425 }
426
427 1606725 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
428 {
429
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1675923 while (run >= 33) {
430 69198 put_bits(&s->pb, 11, 0x008);
431 69198 run -= 33;
432 }
433 1606725 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
434 1606725 ff_mpeg12_mbAddrIncrTable[run][0]);
435 1606725 }
436
437 479006 static av_always_inline void put_qscale(MpegEncContext *s)
438 {
439 479006 put_bits(&s->pb, 5, s->qscale);
440 479006 }
441
442 293238 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
443 {
444
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293238 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
445 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
446 /* slice_vertical_position_extension */
447 put_bits(&s->pb, 3, s->mb_y >> 7);
448 } else {
449 293238 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
450 }
451 293238 put_qscale(s);
452 /* slice extra information */
453 293238 put_bits(&s->pb, 1, 0);
454 293238 }
455
456 2370 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
457 {
458 2370 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
459 AVFrameSideData *side_data;
460 2370 mpeg1_encode_sequence_header(s);
461
462 /* MPEG-1 picture header */
463 2370 put_header(s, PICTURE_START_CODE);
464 /* temporal reference */
465
466 // RAL: s->picture_number instead of s->fake_picture_number
467 2370 put_bits(&s->pb, 10,
468 2370 (s->picture_number - mpeg12->gop_picture_number) & 0x3ff);
469 2370 put_bits(&s->pb, 3, s->pict_type);
470
471 2370 s->vbv_delay_pos = put_bytes_count(&s->pb, 0);
472 2370 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
473
474 // RAL: Forward f_code also needed for B-frames
475
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2370 if (s->pict_type == AV_PICTURE_TYPE_P ||
476
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1099 s->pict_type == AV_PICTURE_TYPE_B) {
477 1978 put_bits(&s->pb, 1, 0); /* half pel coordinates */
478
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1978 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
479 427 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
480 else
481 1551 put_bits(&s->pb, 3, 7); /* forward_f_code */
482 }
483
484 // RAL: Backward f_code necessary for B-frames
485
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2370 if (s->pict_type == AV_PICTURE_TYPE_B) {
486 707 put_bits(&s->pb, 1, 0); /* half pel coordinates */
487
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707 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
488 144 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
489 else
490 563 put_bits(&s->pb, 3, 7); /* backward_f_code */
491 }
492
493 2370 put_bits(&s->pb, 1, 0); /* extra bit picture */
494
495 2370 s->frame_pred_frame_dct = 1;
496
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2370 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
497 1890 put_header(s, EXT_START_CODE);
498 1890 put_bits(&s->pb, 4, 8); /* pic ext */
499
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1890 if (s->pict_type == AV_PICTURE_TYPE_P ||
500
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902 s->pict_type == AV_PICTURE_TYPE_B) {
501 1551 put_bits(&s->pb, 4, s->f_code);
502 1551 put_bits(&s->pb, 4, s->f_code);
503 } else {
504 339 put_bits(&s->pb, 8, 255);
505 }
506
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1890 if (s->pict_type == AV_PICTURE_TYPE_B) {
507 563 put_bits(&s->pb, 4, s->b_code);
508 563 put_bits(&s->pb, 4, s->b_code);
509 } else {
510 1327 put_bits(&s->pb, 8, 255);
511 }
512 1890 put_bits(&s->pb, 2, s->intra_dc_precision);
513
514
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1890 av_assert0(s->picture_structure == PICT_FRAME);
515 1890 put_bits(&s->pb, 2, s->picture_structure);
516
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1890 if (s->progressive_sequence)
517 940 put_bits(&s->pb, 1, 0); /* no repeat */
518 else
519 950 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
520 /* XXX: optimize the generation of this flag with entropy measures */
521 1890 s->frame_pred_frame_dct = s->progressive_sequence;
522
523 1890 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
524 1890 put_bits(&s->pb, 1, s->concealment_motion_vectors);
525 1890 put_bits(&s->pb, 1, s->q_scale_type);
526 1890 put_bits(&s->pb, 1, s->intra_vlc_format);
527 1890 put_bits(&s->pb, 1, s->alternate_scan);
528 1890 put_bits(&s->pb, 1, s->repeat_first_field);
529 1890 s->progressive_frame = s->progressive_sequence;
530 /* chroma_420_type */
531
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3430 put_bits(&s->pb, 1, s->chroma_format ==
532 1540 CHROMA_420 ? s->progressive_frame : 0);
533 1890 put_bits(&s->pb, 1, s->progressive_frame);
534 1890 put_bits(&s->pb, 1, 0); /* composite_display_flag */
535 }
536
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2370 if (mpeg12->scan_offset) {
537 int i;
538
539 put_header(s, USER_START_CODE);
540 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
541 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
542 }
543 2370 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
544 AV_FRAME_DATA_STEREO3D);
545
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2370 if (side_data) {
546 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
547 uint8_t fpa_type;
548
549 switch (stereo->type) {
550 case AV_STEREO3D_SIDEBYSIDE:
551 fpa_type = 0x03;
552 break;
553 case AV_STEREO3D_TOPBOTTOM:
554 fpa_type = 0x04;
555 break;
556 case AV_STEREO3D_2D:
557 fpa_type = 0x08;
558 break;
559 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
560 fpa_type = 0x23;
561 break;
562 default:
563 fpa_type = 0;
564 break;
565 }
566
567 if (fpa_type != 0) {
568 put_header(s, USER_START_CODE);
569 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
570 put_bits(&s->pb, 8, 'P');
571 put_bits(&s->pb, 8, '3');
572 put_bits(&s->pb, 8, 'D');
573 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
574
575 put_bits(&s->pb, 1, 1); // reserved_bit
576 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
577 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
578 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
579 }
580 }
581
582
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2370 if (CONFIG_MPEG2VIDEO_ENCODER && mpeg12->a53_cc) {
583 1890 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
584 AV_FRAME_DATA_A53_CC);
585
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1890 if (side_data) {
586 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
587 int i = 0;
588
589 put_header (s, USER_START_CODE);
590
591 put_bits(&s->pb, 8, 'G'); // user_identifier
592 put_bits(&s->pb, 8, 'A');
593 put_bits(&s->pb, 8, '9');
594 put_bits(&s->pb, 8, '4');
595 put_bits(&s->pb, 8, 3); // user_data_type_code
596 put_bits(&s->pb, 8,
597 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
598 put_bits(&s->pb, 8, 0xff); // em_data
599
600 for (i = 0; i < side_data->size; i++)
601 put_bits(&s->pb, 8, side_data->data[i]);
602
603 put_bits(&s->pb, 8, 0xff); // marker_bits
604 } else {
605 av_log(s->avctx, AV_LOG_WARNING,
606 "Closed Caption size (%"SIZE_SPECIFIER") can not exceed "
607 "93 bytes and must be a multiple of 3\n", side_data->size);
608 }
609 }
610 }
611
612 2370 s->mb_y = 0;
613 2370 ff_mpeg1_encode_slice_header(s);
614 2370 }
615
616 1326255 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
617 int has_mv, int field_motion)
618 {
619 1326255 put_bits(&s->pb, n, bits);
620
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1326255 if (!s->frame_pred_frame_dct) {
621
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702603 if (has_mv)
622 /* motion_type: frame/field */
623 365122 put_bits(&s->pb, 2, 2 - field_motion);
624 702603 put_bits(&s->pb, 1, s->interlaced_dct);
625 }
626 1326255 }
627
628 // RAL: Parameter added: f_or_b_code
629 3016286 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
630 {
631
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3016286 if (val == 0) {
632 /* zero vector, corresponds to ff_mpeg12_mbMotionVectorTable[0] */
633 1197926 put_bits(&s->pb, 1, 0x01);
634 } else {
635 int code, sign, bits;
636 1818360 int bit_size = f_or_b_code - 1;
637 1818360 int range = 1 << bit_size;
638 /* modulo encoding */
639 1818360 val = sign_extend(val, 5 + bit_size);
640
641
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1818360 if (val >= 0) {
642 885548 val--;
643 885548 code = (val >> bit_size) + 1;
644 885548 bits = val & (range - 1);
645 885548 sign = 0;
646 } else {
647 932812 val = -val;
648 932812 val--;
649 932812 code = (val >> bit_size) + 1;
650 932812 bits = val & (range - 1);
651 932812 sign = 1;
652 }
653
654 av_assert2(code > 0 && code <= 16);
655
656 1818360 put_bits(&s->pb,
657 1818360 ff_mpeg12_mbMotionVectorTable[code][1],
658 1818360 ff_mpeg12_mbMotionVectorTable[code][0]);
659
660 1818360 put_bits(&s->pb, 1, sign);
661
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1818360 if (bit_size > 0)
662 1269838 put_bits(&s->pb, bit_size, bits);
663 }
664 3016286 }
665
666 3290402 static inline void encode_dc(MpegEncContext *s, int diff, int component)
667 {
668 3290402 unsigned int diff_u = diff + 255;
669
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3290402 if (diff_u >= 511) {
670 int index;
671
672
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162210 if (diff < 0) {
673 113286 index = av_log2_16bit(-2 * diff);
674 113286 diff--;
675 } else {
676 48924 index = av_log2_16bit(2 * diff);
677 }
678
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162210 if (component == 0)
679 91380 put_bits(&s->pb,
680 91380 ff_mpeg12_vlc_dc_lum_bits[index] + index,
681 91380 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
682 91380 av_mod_uintp2(diff, index));
683 else
684 70830 put_bits(&s->pb,
685 70830 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
686 70830 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
687 70830 av_mod_uintp2(diff, index));
688 } else {
689
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3128192 if (component == 0)
690 1708208 put_bits(&s->pb,
691 1708208 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
692 1708208 mpeg1_lum_dc_uni[diff + 255] >> 8);
693 else
694 1419984 put_bits(&s->pb,
695 1419984 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
696 1419984 mpeg1_chr_dc_uni[diff + 255] >> 8);
697 }
698 3290402 }
699
700 6533249 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
701 {
702 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
703 int code, component;
704 6533249 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
705
706 6533249 last_index = s->block_last_index[n];
707
708 /* DC coef */
709
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6533249 if (s->mb_intra) {
710
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3290402 component = (n <= 3 ? 0 : (n & 1) + 1);
711 3290402 dc = block[0]; /* overflow is impossible */
712 3290402 diff = dc - s->last_dc[component];
713 3290402 encode_dc(s, diff, component);
714 3290402 s->last_dc[component] = dc;
715 3290402 i = 1;
716
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3290402 if (s->intra_vlc_format)
717 2643692 table_vlc = ff_rl_mpeg2.table_vlc;
718 } else {
719 /* encode the first coefficient: needs to be done here because
720 * it is handled slightly differently */
721 3242847 level = block[0];
722
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3242847 if (abs(level) == 1) {
723 951831 code = ((uint32_t)level >> 31); /* the sign bit */
724 951831 put_bits(&s->pb, 2, code | 0x02);
725 951831 i = 1;
726 } else {
727 2291016 i = 0;
728 2291016 last_non_zero = -1;
729 2291016 goto next_coef;
730 }
731 }
732
733 /* now quantify & encode AC coefs */
734 4242233 last_non_zero = i - 1;
735
736
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163342617 for (; i <= last_index; i++) {
737 156809368 j = s->intra_scantable.permutated[i];
738 156809368 level = block[j];
739
740 159100384 next_coef:
741 /* encode using VLC */
742
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159100384 if (level != 0) {
743 65584697 run = i - last_non_zero - 1;
744
745 65584697 alevel = level;
746 65584697 MASK_ABS(sign, alevel);
747 65584697 sign &= 1;
748
749
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65584697 if (alevel <= ff_rl_mpeg1.max_level[0][run]) {
750 63504190 code = ff_rl_mpeg1.index_run[0][run] + alevel - 1;
751 /* store the VLC & sign at once */
752 63504190 put_bits(&s->pb, table_vlc[code][1] + 1,
753 63504190 (table_vlc[code][0] << 1) + sign);
754 } else {
755 /* Escape seems to be pretty rare <5% so I do not optimize it;
756 * the following value is the common escape value for both
757 * possible tables (i.e. table_vlc[111]). */
758 2080507 put_bits(&s->pb, 6, 0x01);
759 /* escape: only clip in this case */
760 2080507 put_bits(&s->pb, 6, run);
761
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2080507 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
762
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✗ Branch 1 not taken.
82631 if (alevel < 128) {
763 82631 put_sbits(&s->pb, 8, level);
764 } else {
765 if (level < 0)
766 put_bits(&s->pb, 16, 0x8001 + level + 255);
767 else
768 put_sbits(&s->pb, 16, level);
769 }
770 } else {
771 1997876 put_sbits(&s->pb, 12, level);
772 }
773 }
774 65584697 last_non_zero = i;
775 }
776 }
777 /* end of block */
778 6533249 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
779 6533249 }
780
781 1711467 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
782 int16_t block[8][64],
783 int motion_x, int motion_y,
784 int mb_block_count,
785 int chroma_y_shift)
786 {
787 /* MPEG-1 is always 420. */
788 #define IS_MPEG1(s) (chroma_y_shift == 1 && (s)->codec_id == AV_CODEC_ID_MPEG1VIDEO)
789 int i, cbp;
790 1711467 const int mb_x = s->mb_x;
791 1711467 const int mb_y = s->mb_y;
792
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1711467 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
793
794 /* compute cbp */
795 1711467 cbp = 0;
796
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13266499 for (i = 0; i < mb_block_count; i++)
797
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11555032 if (s->block_last_index[i] >= 0)
798 6533249 cbp |= 1 << (mb_block_count - 1 - i);
799
800
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✓ Branch 5 taken 21556 times.
1711467 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
801
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355639 (mb_x != s->mb_width - 1 ||
802
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✓ Branch 3 taken 1877 times.
✓ Branch 4 taken 542 times.
✓ Branch 5 taken 7801 times.
10555 (mb_y != s->end_mb_y - 1 && IS_MPEG1(s))) &&
803
4/4
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345626 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
804
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244763 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
805 21548 (((s->mv_dir & MV_DIR_FORWARD)
806 20583 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
807
4/4
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✓ Branch 1 taken 965 times.
✓ Branch 2 taken 3879 times.
✓ Branch 3 taken 17669 times.
43096 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
808 21548 ((s->mv_dir & MV_DIR_BACKWARD)
809 20991 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
810
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21548 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
811 104742 s->mb_skip_run++;
812 104742 s->qscale -= s->dquant;
813 104742 s->skip_count++;
814 104742 s->misc_bits++;
815 104742 s->last_bits++;
816
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104742 if (s->pict_type == AV_PICTURE_TYPE_P) {
817 100863 s->last_mv[0][0][0] =
818 100863 s->last_mv[0][0][1] =
819 100863 s->last_mv[0][1][0] =
820 100863 s->last_mv[0][1][1] = 0;
821 }
822 } else {
823
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1606725 if (first_mb) {
824
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320329 av_assert0(s->mb_skip_run == 0);
825 320329 encode_mb_skip_run(s, s->mb_x);
826 } else {
827 1286396 encode_mb_skip_run(s, s->mb_skip_run);
828 }
829
830
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1606725 if (s->pict_type == AV_PICTURE_TYPE_I) {
831
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393204 if (s->dquant && cbp) {
832 /* macroblock_type: macroblock_quant = 1 */
833 43950 put_mb_modes(s, 2, 1, 0, 0);
834 43950 put_qscale(s);
835 } else {
836 /* macroblock_type: macroblock_quant = 0 */
837 349254 put_mb_modes(s, 1, 1, 0, 0);
838 349254 s->qscale -= s->dquant;
839 }
840 393204 s->misc_bits += get_bits_diff(s);
841 393204 s->i_count++;
842
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1213521 } else if (s->mb_intra) {
843
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56693 if (s->dquant && cbp) {
844 11248 put_mb_modes(s, 6, 0x01, 0, 0);
845 11248 put_qscale(s);
846 } else {
847 45445 put_mb_modes(s, 5, 0x03, 0, 0);
848 45445 s->qscale -= s->dquant;
849 }
850 56693 s->misc_bits += get_bits_diff(s);
851 56693 s->i_count++;
852 56693 memset(s->last_mv, 0, sizeof(s->last_mv));
853
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1156828 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
854
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575484 if (s->mv_type == MV_TYPE_16X16) {
855
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552531 if (cbp != 0) {
856
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465798 if ((motion_x | motion_y) == 0) {
857
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48685 if (s->dquant) {
858 /* macroblock_pattern & quant */
859 4208 put_mb_modes(s, 5, 1, 0, 0);
860 4208 put_qscale(s);
861 } else {
862 /* macroblock_pattern only */
863 44477 put_mb_modes(s, 2, 1, 0, 0);
864 }
865 48685 s->misc_bits += get_bits_diff(s);
866 } else {
867
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417113 if (s->dquant) {
868 70756 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
869 70756 put_qscale(s);
870 } else {
871 346357 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
872 }
873 417113 s->misc_bits += get_bits_diff(s);
874 // RAL: f_code parameter added
875 417113 mpeg1_encode_motion(s,
876 417113 motion_x - s->last_mv[0][0][0],
877 s->f_code);
878 // RAL: f_code parameter added
879 417113 mpeg1_encode_motion(s,
880 417113 motion_y - s->last_mv[0][0][1],
881 s->f_code);
882 417113 s->mv_bits += get_bits_diff(s);
883 }
884 } else {
885 86733 put_bits(&s->pb, 3, 1); /* motion only */
886
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86733 if (!s->frame_pred_frame_dct)
887 16441 put_bits(&s->pb, 2, 2); /* motion_type: frame */
888 86733 s->misc_bits += get_bits_diff(s);
889 // RAL: f_code parameter added
890 86733 mpeg1_encode_motion(s,
891 86733 motion_x - s->last_mv[0][0][0],
892 s->f_code);
893 // RAL: f_code parameter added
894 86733 mpeg1_encode_motion(s,
895 86733 motion_y - s->last_mv[0][0][1],
896 s->f_code);
897 86733 s->qscale -= s->dquant;
898 86733 s->mv_bits += get_bits_diff(s);
899 }
900 552531 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
901 552531 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
902 } else {
903 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
904
905
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22953 if (cbp) {
906
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21459 if (s->dquant) {
907 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
908 put_qscale(s);
909 } else {
910 21459 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
911 }
912 } else {
913 1494 put_bits(&s->pb, 3, 1); /* motion only */
914 1494 put_bits(&s->pb, 2, 1); /* motion_type: field */
915 1494 s->qscale -= s->dquant;
916 }
917 22953 s->misc_bits += get_bits_diff(s);
918
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68859 for (i = 0; i < 2; i++) {
919 45906 put_bits(&s->pb, 1, s->field_select[0][i]);
920 45906 mpeg1_encode_motion(s,
921 45906 s->mv[0][i][0] - s->last_mv[0][i][0],
922 s->f_code);
923 45906 mpeg1_encode_motion(s,
924 45906 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
925 s->f_code);
926 45906 s->last_mv[0][i][0] = s->mv[0][i][0];
927 45906 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
928 }
929 22953 s->mv_bits += get_bits_diff(s);
930 }
931
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575484 if (cbp) {
932
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487257 if (chroma_y_shift) {
933 411334 put_bits(&s->pb,
934 411334 ff_mpeg12_mbPatTable[cbp][1],
935 411334 ff_mpeg12_mbPatTable[cbp][0]);
936 } else {
937 75923 put_bits(&s->pb,
938 75923 ff_mpeg12_mbPatTable[cbp >> 2][1],
939 75923 ff_mpeg12_mbPatTable[cbp >> 2][0]);
940 75923 put_sbits(&s->pb, 2, cbp);
941 }
942 }
943 } else {
944
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581344 if (s->mv_type == MV_TYPE_16X16) {
945
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486295 if (cbp) { // With coded bloc pattern
946
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314569 if (s->dquant) {
947
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55606 if (s->mv_dir == MV_DIR_FORWARD)
948 12773 put_mb_modes(s, 6, 3, 1, 0);
949 else
950 42833 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
951 55606 put_qscale(s);
952 } else {
953 258963 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
954 }
955 } else { // No coded bloc pattern
956 171726 put_bits(&s->pb, 5 - s->mv_dir, 2);
957
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171726 if (!s->frame_pred_frame_dct)
958 78149 put_bits(&s->pb, 2, 2); /* motion_type: frame */
959 171726 s->qscale -= s->dquant;
960 }
961 486295 s->misc_bits += get_bits_diff(s);
962
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486295 if (s->mv_dir & MV_DIR_FORWARD) {
963 347991 mpeg1_encode_motion(s,
964 347991 s->mv[0][0][0] - s->last_mv[0][0][0],
965 s->f_code);
966 347991 mpeg1_encode_motion(s,
967 347991 s->mv[0][0][1] - s->last_mv[0][0][1],
968 s->f_code);
969 347991 s->last_mv[0][0][0] =
970 347991 s->last_mv[0][1][0] = s->mv[0][0][0];
971 347991 s->last_mv[0][0][1] =
972 347991 s->last_mv[0][1][1] = s->mv[0][0][1];
973 }
974
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486295 if (s->mv_dir & MV_DIR_BACKWARD) {
975 366304 mpeg1_encode_motion(s,
976 366304 s->mv[1][0][0] - s->last_mv[1][0][0],
977 s->b_code);
978 366304 mpeg1_encode_motion(s,
979 366304 s->mv[1][0][1] - s->last_mv[1][0][1],
980 s->b_code);
981 366304 s->last_mv[1][0][0] =
982 366304 s->last_mv[1][1][0] = s->mv[1][0][0];
983 366304 s->last_mv[1][0][1] =
984 366304 s->last_mv[1][1][1] = s->mv[1][0][1];
985 }
986 } else {
987 av_assert2(s->mv_type == MV_TYPE_FIELD);
988 av_assert2(!s->frame_pred_frame_dct);
989
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95049 if (cbp) { // With coded bloc pattern
990
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74532 if (s->dquant) {
991 if (s->mv_dir == MV_DIR_FORWARD)
992 put_mb_modes(s, 6, 3, 1, 1);
993 else
994 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
995 put_qscale(s);
996 } else {
997 74532 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
998 }
999 } else { // No coded bloc pattern
1000 20517 put_bits(&s->pb, 5 - s->mv_dir, 2);
1001 20517 put_bits(&s->pb, 2, 1); /* motion_type: field */
1002 20517 s->qscale -= s->dquant;
1003 }
1004 95049 s->misc_bits += get_bits_diff(s);
1005
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95049 if (s->mv_dir & MV_DIR_FORWARD) {
1006
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182619 for (i = 0; i < 2; i++) {
1007 121746 put_bits(&s->pb, 1, s->field_select[0][i]);
1008 121746 mpeg1_encode_motion(s,
1009 121746 s->mv[0][i][0] - s->last_mv[0][i][0],
1010 s->f_code);
1011 121746 mpeg1_encode_motion(s,
1012 121746 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
1013 s->f_code);
1014 121746 s->last_mv[0][i][0] = s->mv[0][i][0];
1015 121746 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
1016 }
1017 }
1018
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95049 if (s->mv_dir & MV_DIR_BACKWARD) {
1019
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183525 for (i = 0; i < 2; i++) {
1020 122350 put_bits(&s->pb, 1, s->field_select[1][i]);
1021 122350 mpeg1_encode_motion(s,
1022 122350 s->mv[1][i][0] - s->last_mv[1][i][0],
1023 s->b_code);
1024 122350 mpeg1_encode_motion(s,
1025 122350 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
1026 s->b_code);
1027 122350 s->last_mv[1][i][0] = s->mv[1][i][0];
1028 122350 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1029 }
1030 }
1031 }
1032 581344 s->mv_bits += get_bits_diff(s);
1033
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581344 if (cbp) {
1034
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389101 if (chroma_y_shift) {
1035 206508 put_bits(&s->pb,
1036 206508 ff_mpeg12_mbPatTable[cbp][1],
1037 206508 ff_mpeg12_mbPatTable[cbp][0]);
1038 } else {
1039 182593 put_bits(&s->pb,
1040 182593 ff_mpeg12_mbPatTable[cbp >> 2][1],
1041 182593 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1042 182593 put_sbits(&s->pb, 2, cbp);
1043 }
1044 }
1045 }
1046
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12532079 for (i = 0; i < mb_block_count; i++)
1047
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10925354 if (cbp & (1 << (mb_block_count - 1 - i)))
1048 6533249 mpeg1_encode_block(s, block[i], i);
1049 1606725 s->mb_skip_run = 0;
1050
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1606725 if (s->mb_intra)
1051 449897 s->i_tex_bits += get_bits_diff(s);
1052 else
1053 1156828 s->p_tex_bits += get_bits_diff(s);
1054 }
1055 1711467 }
1056
1057 1711467 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1058 int motion_x, int motion_y)
1059 {
1060
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1711467 if (s->chroma_format == CHROMA_420)
1061 1068352 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6, 1);
1062 else
1063 643115 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8, 0);
1064 1711467 }
1065
1066 50 static av_cold void mpeg12_encode_init_static(void)
1067 {
1068 static uint8_t mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
1069
1070 50 ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store[0]);
1071 50 ff_rl_init(&ff_rl_mpeg2, mpeg12_static_rl_table_store[1]);
1072
1073 50 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1074 50 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1075
1076 /* build unified dc encoding tables */
1077
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25600 for (int i = -255; i < 256; i++) {
1078 int adiff, index;
1079 int bits, code;
1080 25550 int diff = i;
1081
1082 25550 adiff = FFABS(diff);
1083
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25550 if (diff < 0)
1084 12750 diff--;
1085 25550 index = av_log2(2 * adiff);
1086
1087 25550 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1088 25550 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1089 25550 av_mod_uintp2(diff, index);
1090 25550 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1091
1092 25550 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1093 25550 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1094 25550 av_mod_uintp2(diff, index);
1095 25550 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1096 }
1097
1098
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400 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1099
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5735100 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1100 int len;
1101
1102
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5734750 if (mv == 0) {
1103 350 len = 1; /* ff_mpeg12_mbMotionVectorTable[0][1] */
1104 } else {
1105 int val, bit_size, code;
1106
1107 5734400 bit_size = f_code - 1;
1108
1109 5734400 val = mv;
1110
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5734400 if (val < 0)
1111 2867200 val = -val;
1112 5734400 val--;
1113 5734400 code = (val >> bit_size) + 1;
1114
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5734400 if (code < 17)
1115 203200 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1116 1 + bit_size;
1117 else
1118 5531200 len = 10 /* ff_mpeg12_mbMotionVectorTable[16][1] */ +
1119 2 + bit_size;
1120 }
1121
1122 5734750 mv_penalty[f_code][mv + MAX_DMV] = len;
1123 }
1124
1125
1126
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400 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1127
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203550 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1128 203200 fcode_tab[mv + MAX_MV] = f_code;
1129 50 }
1130
1131 50 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1132 {
1133 static AVOnce init_static_once = AV_ONCE_INIT;
1134
1135 50 ff_mpeg12_common_init(s);
1136
1137 50 s->me.mv_penalty = mv_penalty;
1138 50 s->fcode_tab = fcode_tab;
1139
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50 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1140 11 s->min_qcoeff = -255;
1141 11 s->max_qcoeff = 255;
1142 } else {
1143 39 s->min_qcoeff = -2047;
1144 39 s->max_qcoeff = 2047;
1145 39 s->mpeg_quant = 1;
1146 }
1147
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50 if (s->intra_vlc_format) {
1148 13 s->intra_ac_vlc_length =
1149 13 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1150 } else {
1151 37 s->intra_ac_vlc_length =
1152 37 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1153 }
1154 50 s->inter_ac_vlc_length =
1155 50 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1156
1157 50 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1158 50 }
1159
1160 #define OFFSET(x) offsetof(MPEG12EncContext, x)
1161 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1162 #define COMMON_OPTS \
1163 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1164 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1165 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1166 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1167 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1168 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1169 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1170 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1171 FF_MPV_COMMON_BFRAME_OPTS
1172
1173 static const AVOption mpeg1_options[] = {
1174 COMMON_OPTS
1175 FF_MPV_COMMON_OPTS
1176 FF_MPV_COMMON_MOTION_EST_OPTS
1177 { NULL },
1178 };
1179
1180 static const AVOption mpeg2_options[] = {
1181 COMMON_OPTS
1182 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1183 FF_MPV_OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1184 { "non_linear_quant", "Use nonlinear quantizer.", FF_MPV_OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1185 { "alternate_scan", "Enable alternate scantable.", FF_MPV_OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1186 { "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
1187 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1188 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1189 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1190 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1191 { "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1192 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1193 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1194 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1195 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1196 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1197 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1198 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1199 { LEVEL("high", 4) },
1200 { LEVEL("high1440", 6) },
1201 { LEVEL("main", 8) },
1202 { LEVEL("low", 10) },
1203 #undef LEVEL
1204 FF_MPV_COMMON_OPTS
1205 FF_MPV_COMMON_MOTION_EST_OPTS
1206 FF_MPEG2_PROFILE_OPTS
1207 { NULL },
1208 };
1209
1210 #define mpeg12_class(x) \
1211 static const AVClass mpeg ## x ## _class = { \
1212 .class_name = "mpeg" # x "video encoder", \
1213 .item_name = av_default_item_name, \
1214 .option = mpeg ## x ## _options, \
1215 .version = LIBAVUTIL_VERSION_INT, \
1216 };
1217
1218 mpeg12_class(1)
1219 mpeg12_class(2)
1220
1221 const FFCodec ff_mpeg1video_encoder = {
1222 .p.name = "mpeg1video",
1223 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1224 .p.type = AVMEDIA_TYPE_VIDEO,
1225 .p.id = AV_CODEC_ID_MPEG1VIDEO,
1226 .priv_data_size = sizeof(MPEG12EncContext),
1227 .init = encode_init,
1228 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1229 .close = ff_mpv_encode_end,
1230 .p.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1231 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1232 AV_PIX_FMT_NONE },
1233 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1234 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1235 .p.priv_class = &mpeg1_class,
1236 };
1237
1238 const FFCodec ff_mpeg2video_encoder = {
1239 .p.name = "mpeg2video",
1240 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1241 .p.type = AVMEDIA_TYPE_VIDEO,
1242 .p.id = AV_CODEC_ID_MPEG2VIDEO,
1243 .priv_data_size = sizeof(MPEG12EncContext),
1244 .init = encode_init,
1245 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1246 .close = ff_mpv_encode_end,
1247 .p.supported_framerates = ff_mpeg2_frame_rate_tab,
1248 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1249 AV_PIX_FMT_YUV422P,
1250 AV_PIX_FMT_NONE },
1251 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1252 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1253 .p.priv_class = &mpeg2_class,
1254 };
1255 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
1256