FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12enc.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 596 685 87.0%
Functions: 17 17 100.0%
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 "mpeg12vlc.h"
47 #include "mpegutils.h"
48 #include "mpegvideo.h"
49 #include "mpegvideodata.h"
50 #include "mpegvideoenc.h"
51 #include "profiles.h"
52 #include "rl.h"
53
54 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
55 static const uint8_t svcd_scan_offset_placeholder[] = {
56 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
57 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
58 };
59
60 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
61 static uint8_t fcode_tab[MAX_MV * 2 + 1];
62
63 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
64 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
65
66 static uint8_t mpeg12_max_level[MAX_LEVEL + 1];
67 static uint8_t mpeg12_index_run[MAX_RUN + 1];
68
69 /* simple include everything table for dc, first byte is bits
70 * number next 3 are code */
71 static uint32_t mpeg1_lum_dc_uni[512];
72 static uint32_t mpeg1_chr_dc_uni[512];
73
74 typedef struct MPEG12EncContext {
75 MpegEncContext mpeg;
76 AVRational frame_rate_ext;
77 unsigned frame_rate_index;
78
79 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num
80
81 int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
82 AVTimecode tc; ///< timecode context
83 char *tc_opt_str; ///< timecode option string
84 int drop_frame_timecode; ///< timecode is in drop frame format.
85 int scan_offset; ///< reserve space for SVCD scan offset user data.
86
87 int a53_cc;
88 int seq_disp_ext;
89 int video_format;
90 #define VIDEO_FORMAT_COMPONENT 0
91 #define VIDEO_FORMAT_PAL 1
92 #define VIDEO_FORMAT_NTSC 2
93 #define VIDEO_FORMAT_SECAM 3
94 #define VIDEO_FORMAT_MAC 4
95 #define VIDEO_FORMAT_UNSPECIFIED 5
96 } MPEG12EncContext;
97
98 #define A53_MAX_CC_COUNT 0x1f
99 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
100
101 109 av_cold void ff_mpeg1_init_uni_ac_vlc(const int8_t max_level[],
102 const uint8_t index_run[],
103 const uint16_t table_vlc[][2],
104 uint8_t uni_ac_vlc_len[])
105 {
106 int i;
107
108
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14061 for (i = 0; i < 128; i++) {
109 13952 int level = i - 64;
110 int run;
111
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13952 if (!level)
112 109 continue;
113
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899795 for (run = 0; run < 64; run++) {
114 int len, code;
115 885952 int alevel = FFABS(level);
116
117
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885952 if (alevel > max_level[run])
118 861574 code = 111; /* rl->n */
119 else
120 24378 code = index_run[run] + alevel - 1;
121
122
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885952 if (code < 111) { /* rl->n */
123 /* length of VLC and sign */
124 24198 len = table_vlc[code][1] + 1;
125 } else {
126 861754 len = table_vlc[MPEG12_RL_NB_ELEMS][1] + 6;
127
128
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861754 if (alevel < 128)
129 861754 len += 8;
130 else
131 len += 16;
132 }
133
134 885952 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
135 }
136 }
137 109 }
138
139 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
140 50 static int find_frame_rate_index(MPEG12EncContext *mpeg12)
141 {
142 50 MpegEncContext *const s = &mpeg12->mpeg;
143 int i;
144 50 AVRational bestq = (AVRational) {0, 0};
145 AVRational ext;
146 50 AVRational target = av_inv_q(s->avctx->time_base);
147
148
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450 for (i = 1; i < 14; i++) {
149
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450 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
150 i >= 9)
151 50 break;
152
153
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2000 for (ext.num=1; ext.num <= 4; ext.num++) {
154
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52800 for (ext.den=1; ext.den <= 32; ext.den++) {
155 51200 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
156
157
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51200 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
158 24280 continue;
159
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40024 if (av_gcd(ext.den, ext.num) != 1)
160 13104 continue;
161
162
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26920 if ( bestq.num==0
163
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26870 || av_nearer_q(target, bestq, q) < 0
164
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26767 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
165 153 bestq = q;
166 153 mpeg12->frame_rate_index = i;
167 153 mpeg12->frame_rate_ext.num = ext.num;
168 153 mpeg12->frame_rate_ext.den = ext.den;
169 }
170 }
171 }
172 }
173
174
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50 if (av_cmp_q(target, bestq))
175 return -1;
176 else
177 50 return 0;
178 }
179
180 50 static av_cold int encode_init(AVCodecContext *avctx)
181 {
182 50 MPEG12EncContext *const mpeg12 = avctx->priv_data;
183 50 MpegEncContext *const s = &mpeg12->mpeg;
184 int ret;
185
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50 int max_size = avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ? 16383 : 4095;
186
187
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50 if (avctx->width > max_size || avctx->height > max_size) {
188 av_log(avctx, AV_LOG_ERROR, "%s does not support resolutions above %dx%d\n",
189 CONFIG_SMALL ? avctx->codec->name : avctx->codec->long_name,
190 max_size, max_size);
191 return AVERROR(EINVAL);
192 }
193
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50 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
194 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
195 return AVERROR(EINVAL);
196 }
197
198
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50 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
199
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50 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
200 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
201 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
202 return AVERROR(EINVAL);
203 }
204 }
205
206
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50 if (avctx->profile == FF_PROFILE_UNKNOWN) {
207
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50 if (avctx->level != FF_LEVEL_UNKNOWN) {
208 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
209 return AVERROR(EINVAL);
210 }
211 /* Main or 4:2:2 */
212 50 avctx->profile = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? FF_PROFILE_MPEG2_MAIN
213
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50 : FF_PROFILE_MPEG2_422;
214 }
215
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50 if (avctx->level == FF_LEVEL_UNKNOWN) {
216
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50 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
217
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5 if (avctx->width <= 720 && avctx->height <= 608)
218 5 avctx->level = 5; /* Main */
219 else
220 avctx->level = 2; /* High */
221 } else {
222
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45 if (avctx->profile != FF_PROFILE_MPEG2_HIGH &&
223
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45 avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
224 av_log(avctx, AV_LOG_ERROR,
225 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
226 return AVERROR(EINVAL);
227 }
228
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45 if (avctx->width <= 720 && avctx->height <= 576)
229 44 avctx->level = 8; /* Main */
230
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1 else if (avctx->width <= 1440)
231 1 avctx->level = 6; /* High 1440 */
232 else
233 avctx->level = 4; /* High */
234 }
235 }
236
237
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50 if ((ret = ff_mpv_encode_init(avctx)) < 0)
238 return ret;
239
240
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50 if (find_frame_rate_index(mpeg12) < 0) {
241 if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
242 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
243 avctx->time_base.den, avctx->time_base.num);
244 return AVERROR(EINVAL);
245 } else {
246 av_log(avctx, AV_LOG_INFO,
247 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
248 avctx->time_base.den, avctx->time_base.num);
249 }
250 }
251
252
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50 mpeg12->drop_frame_timecode = mpeg12->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
253
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50 if (mpeg12->drop_frame_timecode)
254 mpeg12->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
255
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50 if (mpeg12->drop_frame_timecode && mpeg12->frame_rate_index != 4) {
256 av_log(avctx, AV_LOG_ERROR,
257 "Drop frame time code only allowed with 1001/30000 fps\n");
258 return AVERROR(EINVAL);
259 }
260
261
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50 if (mpeg12->tc_opt_str) {
262 6 AVRational rate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
263 6 int ret = av_timecode_init_from_string(&mpeg12->tc, rate, mpeg12->tc_opt_str, s);
264
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6 if (ret < 0)
265 return ret;
266 6 mpeg12->drop_frame_timecode = !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
267 6 mpeg12->timecode_frame_start = mpeg12->tc.start;
268 } else {
269 44 mpeg12->timecode_frame_start = 0; // default is -1
270 }
271
272 50 return 0;
273 }
274
275 298633 static void put_header(MpegEncContext *s, int header)
276 {
277 298633 align_put_bits(&s->pb);
278 298633 put_bits(&s->pb, 16, header >> 16);
279 298633 put_sbits(&s->pb, 16, header);
280 298633 }
281
282 /* put sequence header if needed */
283 2370 static void mpeg1_encode_sequence_header(MpegEncContext *s)
284 {
285 2370 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
286 unsigned int vbv_buffer_size, fps, v;
287 int constraint_parameter_flag;
288 2370 AVRational framerate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
289 uint64_t time_code;
290 2370 int64_t best_aspect_error = INT64_MAX;
291 2370 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
292 int aspect_ratio_info;
293
294
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2370 if (!s->current_picture.f->key_frame)
295 1978 return;
296
297
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392 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
298 389 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
299
300 /* MPEG-1 header repeated every GOP */
301 392 put_header(s, SEQ_START_CODE);
302
303 392 put_sbits(&s->pb, 12, s->width & 0xFFF);
304 392 put_sbits(&s->pb, 12, s->height & 0xFFF);
305
306
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5880 for (int i = 1; i < 15; i++) {
307 5488 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
308
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5488 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
309 1081 error -= (1LL<<32) / ff_mpeg1_aspect[i];
310 else
311 4407 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
312
313 5488 error = FFABS(error);
314
315
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5488 if (error - 2 <= best_aspect_error) {
316 395 best_aspect_error = error;
317 395 aspect_ratio_info = i;
318 }
319 }
320
321 392 put_bits(&s->pb, 4, aspect_ratio_info);
322 392 put_bits(&s->pb, 4, mpeg12->frame_rate_index);
323
324
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392 if (s->avctx->rc_max_rate) {
325 153 v = (s->avctx->rc_max_rate + 399) / 400;
326
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153 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
327 v = 0x3ffff;
328 } else {
329 239 v = 0x3FFFF;
330 }
331
332
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392 if (s->avctx->rc_buffer_size)
333 153 vbv_buffer_size = s->avctx->rc_buffer_size;
334 else
335 /* VBV calculation: Scaled so that a VCD has the proper
336 * VBV size of 40 kilobytes */
337 239 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
338 392 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
339
340 392 put_sbits(&s->pb, 18, v);
341 392 put_bits(&s->pb, 1, 1); // marker
342 392 put_sbits(&s->pb, 10, vbv_buffer_size);
343
344 392 constraint_parameter_flag =
345 781 s->width <= 768 &&
346
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389 s->height <= 576 &&
347
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239 s->mb_width * s->mb_height <= 396 &&
348
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221 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
349
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215 framerate.num <= framerate.den * 30 &&
350
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215 s->avctx->me_range &&
351 s->avctx->me_range < 128 &&
352 vbv_buffer_size <= 20 &&
353
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781 v <= 1856000 / 400 &&
354 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
355
356 392 put_bits(&s->pb, 1, constraint_parameter_flag);
357
358 392 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
359 392 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
360
361
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392 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
362 const AVFrameSideData *side_data;
363 339 int width = s->width;
364 339 int height = s->height;
365 int use_seq_disp_ext;
366
367 339 put_header(s, EXT_START_CODE);
368 339 put_bits(&s->pb, 4, 1); // seq ext
369
370 339 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
371
372 339 put_bits(&s->pb, 3, s->avctx->profile); // profile
373 339 put_bits(&s->pb, 4, s->avctx->level); // level
374
375 339 put_bits(&s->pb, 1, s->progressive_sequence);
376 339 put_bits(&s->pb, 2, s->chroma_format);
377 339 put_bits(&s->pb, 2, s->width >> 12);
378 339 put_bits(&s->pb, 2, s->height >> 12);
379 339 put_bits(&s->pb, 12, v >> 18); // bitrate ext
380 339 put_bits(&s->pb, 1, 1); // marker
381 339 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
382 339 put_bits(&s->pb, 1, s->low_delay);
383 339 put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
384 339 put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
385
386 339 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
387
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339 if (side_data) {
388 const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
389 if (pan_scan->width && pan_scan->height) {
390 width = pan_scan->width >> 4;
391 height = pan_scan->height >> 4;
392 }
393 }
394
395 1017 use_seq_disp_ext = (width != s->width ||
396
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339 height != s->height ||
397
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339 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
398
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330 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
399
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1005 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
400
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327 mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
401
402
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339 if (mpeg12->seq_disp_ext == 1 ||
403
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339 (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
404 12 put_header(s, EXT_START_CODE);
405 12 put_bits(&s->pb, 4, 2); // sequence display extension
406 12 put_bits(&s->pb, 3, mpeg12->video_format); // video_format
407 12 put_bits(&s->pb, 1, 1); // colour_description
408 12 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
409 12 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
410 12 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
411 12 put_bits(&s->pb, 14, width); // display_horizontal_size
412 12 put_bits(&s->pb, 1, 1); // marker_bit
413 12 put_bits(&s->pb, 14, height); // display_vertical_size
414 12 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
415 }
416 }
417
418 392 put_header(s, GOP_START_CODE);
419 392 put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
420 /* time code: we must convert from the real frame rate to a
421 * fake MPEG frame rate in case of low frame rate */
422 392 fps = (framerate.num + framerate.den / 2) / framerate.den;
423 392 time_code = s->current_picture_ptr->f->coded_picture_number +
424 392 mpeg12->timecode_frame_start;
425
426 392 mpeg12->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
427
428
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392 av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
429
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392 if (mpeg12->drop_frame_timecode)
430 9 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
431
432 392 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
433 392 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
434 392 put_bits(&s->pb, 1, 1);
435 392 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
436 392 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
437 392 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) ||
438
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392 s->intra_only || !mpeg12->gop_picture_number);
439 392 put_bits(&s->pb, 1, 0); // broken link
440 }
441
442 1606530 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
443 {
444
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1675728 while (run >= 33) {
445 69198 put_bits(&s->pb, 11, 0x008);
446 69198 run -= 33;
447 }
448 1606530 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
449 1606530 ff_mpeg12_mbAddrIncrTable[run][0]);
450 1606530 }
451
452 475395 static av_always_inline void put_qscale(MpegEncContext *s)
453 {
454 475395 put_bits(&s->pb, 5, s->qscale);
455 475395 }
456
457 293238 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
458 {
459
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293238 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
460 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
461 /* slice_vertical_position_extension */
462 put_bits(&s->pb, 3, s->mb_y >> 7);
463 } else {
464 293238 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
465 }
466 293238 put_qscale(s);
467 /* slice extra information */
468 293238 put_bits(&s->pb, 1, 0);
469 293238 }
470
471 2370 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
472 {
473 2370 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
474 AVFrameSideData *side_data;
475 2370 mpeg1_encode_sequence_header(s);
476
477 /* MPEG-1 picture header */
478 2370 put_header(s, PICTURE_START_CODE);
479 /* temporal reference */
480
481 // RAL: s->picture_number instead of s->fake_picture_number
482 2370 put_bits(&s->pb, 10,
483 2370 (s->picture_number - mpeg12->gop_picture_number) & 0x3ff);
484 2370 put_bits(&s->pb, 3, s->pict_type);
485
486 2370 s->vbv_delay_pos = put_bytes_count(&s->pb, 0);
487 2370 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
488
489 // RAL: Forward f_code also needed for B-frames
490
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2370 if (s->pict_type == AV_PICTURE_TYPE_P ||
491
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1099 s->pict_type == AV_PICTURE_TYPE_B) {
492 1978 put_bits(&s->pb, 1, 0); /* half pel coordinates */
493
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1978 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
494 427 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
495 else
496 1551 put_bits(&s->pb, 3, 7); /* forward_f_code */
497 }
498
499 // RAL: Backward f_code necessary for B-frames
500
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2370 if (s->pict_type == AV_PICTURE_TYPE_B) {
501 707 put_bits(&s->pb, 1, 0); /* half pel coordinates */
502
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707 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
503 144 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
504 else
505 563 put_bits(&s->pb, 3, 7); /* backward_f_code */
506 }
507
508 2370 put_bits(&s->pb, 1, 0); /* extra bit picture */
509
510 2370 s->frame_pred_frame_dct = 1;
511
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2370 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
512 1890 put_header(s, EXT_START_CODE);
513 1890 put_bits(&s->pb, 4, 8); /* pic ext */
514
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1890 if (s->pict_type == AV_PICTURE_TYPE_P ||
515
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902 s->pict_type == AV_PICTURE_TYPE_B) {
516 1551 put_bits(&s->pb, 4, s->f_code);
517 1551 put_bits(&s->pb, 4, s->f_code);
518 } else {
519 339 put_bits(&s->pb, 8, 255);
520 }
521
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1890 if (s->pict_type == AV_PICTURE_TYPE_B) {
522 563 put_bits(&s->pb, 4, s->b_code);
523 563 put_bits(&s->pb, 4, s->b_code);
524 } else {
525 1327 put_bits(&s->pb, 8, 255);
526 }
527 1890 put_bits(&s->pb, 2, s->intra_dc_precision);
528
529
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1890 av_assert0(s->picture_structure == PICT_FRAME);
530 1890 put_bits(&s->pb, 2, s->picture_structure);
531
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1890 if (s->progressive_sequence)
532 940 put_bits(&s->pb, 1, 0); /* no repeat */
533 else
534 950 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
535 /* XXX: optimize the generation of this flag with entropy measures */
536 1890 s->frame_pred_frame_dct = s->progressive_sequence;
537
538 1890 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
539 1890 put_bits(&s->pb, 1, s->concealment_motion_vectors);
540 1890 put_bits(&s->pb, 1, s->q_scale_type);
541 1890 put_bits(&s->pb, 1, s->intra_vlc_format);
542 1890 put_bits(&s->pb, 1, s->alternate_scan);
543 1890 put_bits(&s->pb, 1, s->repeat_first_field);
544 1890 s->progressive_frame = s->progressive_sequence;
545 /* chroma_420_type */
546
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3430 put_bits(&s->pb, 1, s->chroma_format ==
547 1540 CHROMA_420 ? s->progressive_frame : 0);
548 1890 put_bits(&s->pb, 1, s->progressive_frame);
549 1890 put_bits(&s->pb, 1, 0); /* composite_display_flag */
550 }
551
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2370 if (mpeg12->scan_offset) {
552 int i;
553
554 put_header(s, USER_START_CODE);
555 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
556 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
557 }
558 2370 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
559 AV_FRAME_DATA_STEREO3D);
560
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2370 if (side_data) {
561 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
562 uint8_t fpa_type;
563
564 switch (stereo->type) {
565 case AV_STEREO3D_SIDEBYSIDE:
566 fpa_type = 0x03;
567 break;
568 case AV_STEREO3D_TOPBOTTOM:
569 fpa_type = 0x04;
570 break;
571 case AV_STEREO3D_2D:
572 fpa_type = 0x08;
573 break;
574 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
575 fpa_type = 0x23;
576 break;
577 default:
578 fpa_type = 0;
579 break;
580 }
581
582 if (fpa_type != 0) {
583 put_header(s, USER_START_CODE);
584 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
585 put_bits(&s->pb, 8, 'P');
586 put_bits(&s->pb, 8, '3');
587 put_bits(&s->pb, 8, 'D');
588 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
589
590 put_bits(&s->pb, 1, 1); // reserved_bit
591 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
592 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
593 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
594 }
595 }
596
597
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2370 if (CONFIG_MPEG2VIDEO_ENCODER && mpeg12->a53_cc) {
598 1890 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
599 AV_FRAME_DATA_A53_CC);
600
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1890 if (side_data) {
601 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
602 int i = 0;
603
604 put_header (s, USER_START_CODE);
605
606 put_bits(&s->pb, 8, 'G'); // user_identifier
607 put_bits(&s->pb, 8, 'A');
608 put_bits(&s->pb, 8, '9');
609 put_bits(&s->pb, 8, '4');
610 put_bits(&s->pb, 8, 3); // user_data_type_code
611 put_bits(&s->pb, 8,
612 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
613 put_bits(&s->pb, 8, 0xff); // em_data
614
615 for (i = 0; i < side_data->size; i++)
616 put_bits(&s->pb, 8, side_data->data[i]);
617
618 put_bits(&s->pb, 8, 0xff); // marker_bits
619 } else {
620 av_log(s->avctx, AV_LOG_WARNING,
621 "Closed Caption size (%"SIZE_SPECIFIER") can not exceed "
622 "93 bytes and must be a multiple of 3\n", side_data->size);
623 }
624 }
625 }
626
627 2370 s->mb_y = 0;
628 2370 ff_mpeg1_encode_slice_header(s);
629 2370 }
630
631 1322464 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
632 int has_mv, int field_motion)
633 {
634 1322464 put_bits(&s->pb, n, bits);
635
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1322464 if (!s->frame_pred_frame_dct) {
636
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698812 if (has_mv)
637 /* motion_type: frame/field */
638 364218 put_bits(&s->pb, 2, 2 - field_motion);
639 698812 put_bits(&s->pb, 1, s->interlaced_dct);
640 }
641 1322464 }
642
643 // RAL: Parameter added: f_or_b_code
644 3024586 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
645 {
646
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3024586 if (val == 0) {
647 /* zero vector, corresponds to ff_mpeg12_mbMotionVectorTable[0] */
648 1221109 put_bits(&s->pb, 1, 0x01);
649 } else {
650 int code, sign, bits;
651 1803477 int bit_size = f_or_b_code - 1;
652 1803477 int range = 1 << bit_size;
653 /* modulo encoding */
654 1803477 val = sign_extend(val, 5 + bit_size);
655
656
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1803477 if (val >= 0) {
657 871325 val--;
658 871325 code = (val >> bit_size) + 1;
659 871325 bits = val & (range - 1);
660 871325 sign = 0;
661 } else {
662 932152 val = -val;
663 932152 val--;
664 932152 code = (val >> bit_size) + 1;
665 932152 bits = val & (range - 1);
666 932152 sign = 1;
667 }
668
669 av_assert2(code > 0 && code <= 16);
670
671 1803477 put_bits(&s->pb,
672 1803477 ff_mpeg12_mbMotionVectorTable[code][1],
673 1803477 ff_mpeg12_mbMotionVectorTable[code][0]);
674
675 1803477 put_bits(&s->pb, 1, sign);
676
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1803477 if (bit_size > 0)
677 1265843 put_bits(&s->pb, bit_size, bits);
678 }
679 3024586 }
680
681 3288410 static inline void encode_dc(MpegEncContext *s, int diff, int component)
682 {
683 3288410 unsigned int diff_u = diff + 255;
684
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3288410 if (diff_u >= 511) {
685 int index;
686
687
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162210 if (diff < 0) {
688 113286 index = av_log2_16bit(-2 * diff);
689 113286 diff--;
690 } else {
691 48924 index = av_log2_16bit(2 * diff);
692 }
693
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162210 if (component == 0)
694 91380 put_bits(&s->pb,
695 91380 ff_mpeg12_vlc_dc_lum_bits[index] + index,
696 91380 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
697 91380 av_mod_uintp2(diff, index));
698 else
699 70830 put_bits(&s->pb,
700 70830 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
701 70830 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
702 70830 av_mod_uintp2(diff, index));
703 } else {
704
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3126200 if (component == 0)
705 1707212 put_bits(&s->pb,
706 1707212 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
707 1707212 mpeg1_lum_dc_uni[diff + 255] >> 8);
708 else
709 1418988 put_bits(&s->pb,
710 1418988 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
711 1418988 mpeg1_chr_dc_uni[diff + 255] >> 8);
712 }
713 3288410 }
714
715 6534859 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
716 {
717 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
718 int code, component;
719 6534859 const uint16_t (*table_vlc)[2] = ff_mpeg1_vlc_table;
720
721 6534859 last_index = s->block_last_index[n];
722
723 /* DC coef */
724
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6534859 if (s->mb_intra) {
725
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3288410 component = (n <= 3 ? 0 : (n & 1) + 1);
726 3288410 dc = block[0]; /* overflow is impossible */
727 3288410 diff = dc - s->last_dc[component];
728 3288410 encode_dc(s, diff, component);
729 3288410 s->last_dc[component] = dc;
730 3288410 i = 1;
731
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3288410 if (s->intra_vlc_format)
732 2641700 table_vlc = ff_mpeg2_vlc_table;
733 } else {
734 /* encode the first coefficient: needs to be done here because
735 * it is handled slightly differently */
736 3246449 level = block[0];
737
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3246449 if (abs(level) == 1) {
738 942316 code = ((uint32_t)level >> 31); /* the sign bit */
739 942316 put_bits(&s->pb, 2, code | 0x02);
740 942316 i = 1;
741 } else {
742 2304133 i = 0;
743 2304133 last_non_zero = -1;
744 2304133 goto next_coef;
745 }
746 }
747
748 /* now quantify & encode AC coefs */
749 4230726 last_non_zero = i - 1;
750
751
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165467046 for (; i <= last_index; i++) {
752 158932187 j = s->intra_scantable.permutated[i];
753 158932187 level = block[j];
754
755 161236320 next_coef:
756 /* encode using VLC */
757
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161236320 if (level != 0) {
758 67590726 run = i - last_non_zero - 1;
759
760 67590726 alevel = level;
761 67590726 MASK_ABS(sign, alevel);
762 67590726 sign &= 1;
763
764
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67590726 if (alevel <= mpeg12_max_level[run]) {
765 65466066 code = mpeg12_index_run[run] + alevel - 1;
766 /* store the VLC & sign at once */
767 65466066 put_bits(&s->pb, table_vlc[code][1] + 1,
768 65466066 (table_vlc[code][0] << 1) + sign);
769 } else {
770 /* Escape seems to be pretty rare <5% so I do not optimize it;
771 * the following value is the common escape value for both
772 * possible tables (i.e. table_vlc[111]). */
773 2124660 put_bits(&s->pb, 6, 0x01);
774 /* escape: only clip in this case */
775 2124660 put_bits(&s->pb, 6, run);
776
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2124660 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
777
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82631 if (alevel < 128) {
778 82631 put_sbits(&s->pb, 8, level);
779 } else {
780 if (level < 0)
781 put_bits(&s->pb, 16, 0x8001 + level + 255);
782 else
783 put_sbits(&s->pb, 16, level);
784 }
785 } else {
786 2042029 put_sbits(&s->pb, 12, level);
787 }
788 }
789 67590726 last_non_zero = i;
790 }
791 }
792 /* end of block */
793 6534859 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
794 6534859 }
795
796 1711307 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
797 int16_t block[8][64],
798 int motion_x, int motion_y,
799 int mb_block_count,
800 int chroma_y_shift)
801 {
802 /* MPEG-1 is always 420. */
803 #define IS_MPEG1(s) (chroma_y_shift == 1 && (s)->codec_id == AV_CODEC_ID_MPEG1VIDEO)
804 int i, cbp;
805 1711307 const int mb_x = s->mb_x;
806 1711307 const int mb_y = s->mb_y;
807
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1711307 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
808
809 /* compute cbp */
810 1711307 cbp = 0;
811
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13265059 for (i = 0; i < mb_block_count; i++)
812
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11553752 if (s->block_last_index[i] >= 0)
813 6534859 cbp |= 1 << (mb_block_count - 1 - i);
814
815
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1711307 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
816
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360461 (mb_x != s->mb_width - 1 ||
817
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✓ Branch 5 taken 7801 times.
10623 (mb_y != s->end_mb_y - 1 && IS_MPEG1(s))) &&
818
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350380 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
819
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249482 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
820 21548 (((s->mv_dir & MV_DIR_FORWARD)
821 20583 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
822
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43096 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
823 21548 ((s->mv_dir & MV_DIR_BACKWARD)
824 20991 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
825
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21548 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
826 104777 s->mb_skip_run++;
827 104777 s->qscale -= s->dquant;
828 104777 s->skip_count++;
829 104777 s->misc_bits++;
830 104777 s->last_bits++;
831
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104777 if (s->pict_type == AV_PICTURE_TYPE_P) {
832 100898 s->last_mv[0][0][0] =
833 100898 s->last_mv[0][0][1] =
834 100898 s->last_mv[0][1][0] =
835 100898 s->last_mv[0][1][1] = 0;
836 }
837 } else {
838
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1606530 if (first_mb) {
839
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320421 av_assert0(s->mb_skip_run == 0);
840 320421 encode_mb_skip_run(s, s->mb_x);
841 } else {
842 1286109 encode_mb_skip_run(s, s->mb_skip_run);
843 }
844
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1606530 if (s->pict_type == AV_PICTURE_TYPE_I) {
846
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392344 if (s->dquant && cbp) {
847 /* macroblock_type: macroblock_quant = 1 */
848 43090 put_mb_modes(s, 2, 1, 0, 0);
849 43090 put_qscale(s);
850 } else {
851 /* macroblock_type: macroblock_quant = 0 */
852 349254 put_mb_modes(s, 1, 1, 0, 0);
853 349254 s->qscale -= s->dquant;
854 }
855 392344 s->misc_bits += get_bits_diff(s);
856 392344 s->i_count++;
857
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1214186 } else if (s->mb_intra) {
858
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57304 if (s->dquant && cbp) {
859 11835 put_mb_modes(s, 6, 0x01, 0, 0);
860 11835 put_qscale(s);
861 } else {
862 45469 put_mb_modes(s, 5, 0x03, 0, 0);
863 45469 s->qscale -= s->dquant;
864 }
865 57304 s->misc_bits += get_bits_diff(s);
866 57304 s->i_count++;
867 57304 memset(s->last_mv, 0, sizeof(s->last_mv));
868
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1156882 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
869
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575476 if (s->mv_type == MV_TYPE_16X16) {
870
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552627 if (cbp != 0) {
871
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464802 if ((motion_x | motion_y) == 0) {
872
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46047 if (s->dquant) {
873 /* macroblock_pattern & quant */
874 1554 put_mb_modes(s, 5, 1, 0, 0);
875 1554 put_qscale(s);
876 } else {
877 /* macroblock_pattern only */
878 44493 put_mb_modes(s, 2, 1, 0, 0);
879 }
880 46047 s->misc_bits += get_bits_diff(s);
881 } else {
882
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418755 if (s->dquant) {
883 72388 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
884 72388 put_qscale(s);
885 } else {
886 346367 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
887 }
888 418755 s->misc_bits += get_bits_diff(s);
889 // RAL: f_code parameter added
890 418755 mpeg1_encode_motion(s,
891 418755 motion_x - s->last_mv[0][0][0],
892 s->f_code);
893 // RAL: f_code parameter added
894 418755 mpeg1_encode_motion(s,
895 418755 motion_y - s->last_mv[0][0][1],
896 s->f_code);
897 418755 s->mv_bits += get_bits_diff(s);
898 }
899 } else {
900 87825 put_bits(&s->pb, 3, 1); /* motion only */
901
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87825 if (!s->frame_pred_frame_dct)
902 17533 put_bits(&s->pb, 2, 2); /* motion_type: frame */
903 87825 s->misc_bits += get_bits_diff(s);
904 // RAL: f_code parameter added
905 87825 mpeg1_encode_motion(s,
906 87825 motion_x - s->last_mv[0][0][0],
907 s->f_code);
908 // RAL: f_code parameter added
909 87825 mpeg1_encode_motion(s,
910 87825 motion_y - s->last_mv[0][0][1],
911 s->f_code);
912 87825 s->qscale -= s->dquant;
913 87825 s->mv_bits += get_bits_diff(s);
914 }
915 552627 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
916 552627 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
917 } else {
918 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
919
920
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22849 if (cbp) {
921
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21344 if (s->dquant) {
922 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
923 put_qscale(s);
924 } else {
925 21344 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
926 }
927 } else {
928 1505 put_bits(&s->pb, 3, 1); /* motion only */
929 1505 put_bits(&s->pb, 2, 1); /* motion_type: field */
930 1505 s->qscale -= s->dquant;
931 }
932 22849 s->misc_bits += get_bits_diff(s);
933
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68547 for (i = 0; i < 2; i++) {
934 45698 put_bits(&s->pb, 1, s->field_select[0][i]);
935 45698 mpeg1_encode_motion(s,
936 45698 s->mv[0][i][0] - s->last_mv[0][i][0],
937 s->f_code);
938 45698 mpeg1_encode_motion(s,
939 45698 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
940 s->f_code);
941 45698 s->last_mv[0][i][0] = s->mv[0][i][0];
942 45698 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
943 }
944 22849 s->mv_bits += get_bits_diff(s);
945 }
946
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575476 if (cbp) {
947
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486146 if (chroma_y_shift) {
948 411334 put_bits(&s->pb,
949 411334 ff_mpeg12_mbPatTable[cbp][1],
950 411334 ff_mpeg12_mbPatTable[cbp][0]);
951 } else {
952 74812 put_bits(&s->pb,
953 74812 ff_mpeg12_mbPatTable[cbp >> 2][1],
954 74812 ff_mpeg12_mbPatTable[cbp >> 2][0]);
955 74812 put_sbits(&s->pb, 2, cbp);
956 }
957 }
958 } else {
959
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581406 if (s->mv_type == MV_TYPE_16X16) {
960
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488573 if (cbp) { // With coded bloc pattern
961
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312975 if (s->dquant) {
962
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53290 if (s->mv_dir == MV_DIR_FORWARD)
963 11218 put_mb_modes(s, 6, 3, 1, 0);
964 else
965 42072 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
966 53290 put_qscale(s);
967 } else {
968 259685 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
969 }
970 } else { // No coded bloc pattern
971 175598 put_bits(&s->pb, 5 - s->mv_dir, 2);
972
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175598 if (!s->frame_pred_frame_dct)
973 82021 put_bits(&s->pb, 2, 2); /* motion_type: frame */
974 175598 s->qscale -= s->dquant;
975 }
976 488573 s->misc_bits += get_bits_diff(s);
977
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488573 if (s->mv_dir & MV_DIR_FORWARD) {
978 352875 mpeg1_encode_motion(s,
979 352875 s->mv[0][0][0] - s->last_mv[0][0][0],
980 s->f_code);
981 352875 mpeg1_encode_motion(s,
982 352875 s->mv[0][0][1] - s->last_mv[0][0][1],
983 s->f_code);
984 352875 s->last_mv[0][0][0] =
985 352875 s->last_mv[0][1][0] = s->mv[0][0][0];
986 352875 s->last_mv[0][0][1] =
987 352875 s->last_mv[0][1][1] = s->mv[0][0][1];
988 }
989
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488573 if (s->mv_dir & MV_DIR_BACKWARD) {
990 369420 mpeg1_encode_motion(s,
991 369420 s->mv[1][0][0] - s->last_mv[1][0][0],
992 s->b_code);
993 369420 mpeg1_encode_motion(s,
994 369420 s->mv[1][0][1] - s->last_mv[1][0][1],
995 s->b_code);
996 369420 s->last_mv[1][0][0] =
997 369420 s->last_mv[1][1][0] = s->mv[1][0][0];
998 369420 s->last_mv[1][0][1] =
999 369420 s->last_mv[1][1][1] = s->mv[1][0][1];
1000 }
1001 } else {
1002 av_assert2(s->mv_type == MV_TYPE_FIELD);
1003 av_assert2(!s->frame_pred_frame_dct);
1004
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92833 if (cbp) { // With coded bloc pattern
1005
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73695 if (s->dquant) {
1006 if (s->mv_dir == MV_DIR_FORWARD)
1007 put_mb_modes(s, 6, 3, 1, 1);
1008 else
1009 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
1010 put_qscale(s);
1011 } else {
1012 73695 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
1013 }
1014 } else { // No coded bloc pattern
1015 19138 put_bits(&s->pb, 5 - s->mv_dir, 2);
1016 19138 put_bits(&s->pb, 2, 1); /* motion_type: field */
1017 19138 s->qscale -= s->dquant;
1018 }
1019 92833 s->misc_bits += get_bits_diff(s);
1020
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92833 if (s->mv_dir & MV_DIR_FORWARD) {
1021
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177573 for (i = 0; i < 2; i++) {
1022 118382 put_bits(&s->pb, 1, s->field_select[0][i]);
1023 118382 mpeg1_encode_motion(s,
1024 118382 s->mv[0][i][0] - s->last_mv[0][i][0],
1025 s->f_code);
1026 118382 mpeg1_encode_motion(s,
1027 118382 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
1028 s->f_code);
1029 118382 s->last_mv[0][i][0] = s->mv[0][i][0];
1030 118382 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
1031 }
1032 }
1033
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92833 if (s->mv_dir & MV_DIR_BACKWARD) {
1034
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179007 for (i = 0; i < 2; i++) {
1035 119338 put_bits(&s->pb, 1, s->field_select[1][i]);
1036 119338 mpeg1_encode_motion(s,
1037 119338 s->mv[1][i][0] - s->last_mv[1][i][0],
1038 s->b_code);
1039 119338 mpeg1_encode_motion(s,
1040 119338 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
1041 s->b_code);
1042 119338 s->last_mv[1][i][0] = s->mv[1][i][0];
1043 119338 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1044 }
1045 }
1046 }
1047 581406 s->mv_bits += get_bits_diff(s);
1048
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581406 if (cbp) {
1049
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386670 if (chroma_y_shift) {
1050 206508 put_bits(&s->pb,
1051 206508 ff_mpeg12_mbPatTable[cbp][1],
1052 206508 ff_mpeg12_mbPatTable[cbp][0]);
1053 } else {
1054 180162 put_bits(&s->pb,
1055 180162 ff_mpeg12_mbPatTable[cbp >> 2][1],
1056 180162 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1057 180162 put_sbits(&s->pb, 2, cbp);
1058 }
1059 }
1060 }
1061
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12530324 for (i = 0; i < mb_block_count; i++)
1062
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10923794 if (cbp & (1 << (mb_block_count - 1 - i)))
1063 6534859 mpeg1_encode_block(s, block[i], i);
1064 1606530 s->mb_skip_run = 0;
1065
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1606530 if (s->mb_intra)
1066 449648 s->i_tex_bits += get_bits_diff(s);
1067 else
1068 1156882 s->p_tex_bits += get_bits_diff(s);
1069 }
1070 1711307 }
1071
1072 1711307 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1073 int motion_x, int motion_y)
1074 {
1075
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1711307 if (s->chroma_format == CHROMA_420)
1076 1068352 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6, 1);
1077 else
1078 642955 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8, 0);
1079 1711307 }
1080
1081 50 static av_cold void mpeg12_encode_init_static(void)
1082 {
1083 50 ff_rl_init_level_run(mpeg12_max_level, mpeg12_index_run,
1084 ff_mpeg12_run, ff_mpeg12_level, MPEG12_RL_NB_ELEMS);
1085
1086 50 ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1087 ff_mpeg1_vlc_table, uni_mpeg1_ac_vlc_len);
1088 50 ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1089 ff_mpeg2_vlc_table, uni_mpeg2_ac_vlc_len);
1090
1091 /* build unified dc encoding tables */
1092
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25600 for (int i = -255; i < 256; i++) {
1093 int adiff, index;
1094 int bits, code;
1095 25550 int diff = i;
1096
1097 25550 adiff = FFABS(diff);
1098
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25550 if (diff < 0)
1099 12750 diff--;
1100 25550 index = av_log2(2 * adiff);
1101
1102 25550 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1103 25550 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1104 25550 av_mod_uintp2(diff, index);
1105 25550 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1106
1107 25550 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1108 25550 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1109 25550 av_mod_uintp2(diff, index);
1110 25550 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1111 }
1112
1113
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400 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1114
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5735100 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1115 int len;
1116
1117
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5734750 if (mv == 0) {
1118 350 len = 1; /* ff_mpeg12_mbMotionVectorTable[0][1] */
1119 } else {
1120 int val, bit_size, code;
1121
1122 5734400 bit_size = f_code - 1;
1123
1124 5734400 val = mv;
1125
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5734400 if (val < 0)
1126 2867200 val = -val;
1127 5734400 val--;
1128 5734400 code = (val >> bit_size) + 1;
1129
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5734400 if (code < 17)
1130 203200 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1131 1 + bit_size;
1132 else
1133 5531200 len = 10 /* ff_mpeg12_mbMotionVectorTable[16][1] */ +
1134 2 + bit_size;
1135 }
1136
1137 5734750 mv_penalty[f_code][mv + MAX_DMV] = len;
1138 }
1139
1140
1141
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400 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1142
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203550 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1143 203200 fcode_tab[mv + MAX_MV] = f_code;
1144 50 }
1145
1146 50 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1147 {
1148 static AVOnce init_static_once = AV_ONCE_INIT;
1149
1150 50 s->y_dc_scale_table =
1151 50 s->c_dc_scale_table = ff_mpeg12_dc_scale_table[s->intra_dc_precision];
1152
1153 50 s->me.mv_penalty = mv_penalty;
1154 50 s->fcode_tab = fcode_tab;
1155
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50 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1156 11 s->min_qcoeff = -255;
1157 11 s->max_qcoeff = 255;
1158 } else {
1159 39 s->min_qcoeff = -2047;
1160 39 s->max_qcoeff = 2047;
1161 39 s->mpeg_quant = 1;
1162 }
1163
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50 if (s->intra_vlc_format) {
1164 13 s->intra_ac_vlc_length =
1165 13 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1166 } else {
1167 37 s->intra_ac_vlc_length =
1168 37 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1169 }
1170 50 s->inter_ac_vlc_length =
1171 50 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1172
1173 50 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1174 50 }
1175
1176 #define OFFSET(x) offsetof(MPEG12EncContext, x)
1177 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1178 #define COMMON_OPTS \
1179 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1180 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1181 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1182 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1183 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1184 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1185 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1186 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1187 FF_MPV_COMMON_BFRAME_OPTS
1188
1189 static const AVOption mpeg1_options[] = {
1190 COMMON_OPTS
1191 FF_MPV_COMMON_OPTS
1192 FF_MPV_COMMON_MOTION_EST_OPTS
1193 { NULL },
1194 };
1195
1196 static const AVOption mpeg2_options[] = {
1197 COMMON_OPTS
1198 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1199 FF_MPV_OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1200 { "non_linear_quant", "Use nonlinear quantizer.", FF_MPV_OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1201 { "alternate_scan", "Enable alternate scantable.", FF_MPV_OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1202 { "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
1203 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1204 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1205 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1206 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1207 { "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" },
1208 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1209 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1210 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1211 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1212 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1213 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1214 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1215 { LEVEL("high", 4) },
1216 { LEVEL("high1440", 6) },
1217 { LEVEL("main", 8) },
1218 { LEVEL("low", 10) },
1219 #undef LEVEL
1220 FF_MPV_COMMON_OPTS
1221 FF_MPV_COMMON_MOTION_EST_OPTS
1222 FF_MPEG2_PROFILE_OPTS
1223 { NULL },
1224 };
1225
1226 #define mpeg12_class(x) \
1227 static const AVClass mpeg ## x ## _class = { \
1228 .class_name = "mpeg" # x "video encoder", \
1229 .item_name = av_default_item_name, \
1230 .option = mpeg ## x ## _options, \
1231 .version = LIBAVUTIL_VERSION_INT, \
1232 };
1233
1234 mpeg12_class(1)
1235 mpeg12_class(2)
1236
1237 const FFCodec ff_mpeg1video_encoder = {
1238 .p.name = "mpeg1video",
1239 CODEC_LONG_NAME("MPEG-1 video"),
1240 .p.type = AVMEDIA_TYPE_VIDEO,
1241 .p.id = AV_CODEC_ID_MPEG1VIDEO,
1242 .priv_data_size = sizeof(MPEG12EncContext),
1243 .init = encode_init,
1244 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1245 .close = ff_mpv_encode_end,
1246 .p.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1247 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1248 AV_PIX_FMT_NONE },
1249 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1250 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1251 .p.priv_class = &mpeg1_class,
1252 };
1253
1254 const FFCodec ff_mpeg2video_encoder = {
1255 .p.name = "mpeg2video",
1256 CODEC_LONG_NAME("MPEG-2 video"),
1257 .p.type = AVMEDIA_TYPE_VIDEO,
1258 .p.id = AV_CODEC_ID_MPEG2VIDEO,
1259 .priv_data_size = sizeof(MPEG12EncContext),
1260 .init = encode_init,
1261 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1262 .close = ff_mpv_encode_end,
1263 .p.supported_framerates = ff_mpeg2_frame_rate_tab,
1264 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1265 AV_PIX_FMT_YUV422P,
1266 AV_PIX_FMT_NONE },
1267 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1268 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1269 .p.priv_class = &mpeg2_class,
1270 };
1271 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
1272