FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12enc.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 614 681 90.2%
Functions: 17 17 100.0%
Branches: 334 407 82.1%
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
101 119 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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 15351 for (i = 0; i < 128; i++) {
109 15232 int level = i - 64;
110 int run;
111
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 15232 if (!level)
112 119 continue;
113
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 982345 for (run = 0; run < 64; run++) {
114 int len, code;
115 967232 int alevel = FFABS(level);
116
117
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 967232 if (alevel > max_level[run])
118 940634 code = 111; /* rl->n */
119 else
120 26598 code = index_run[run] + alevel - 1;
121
122
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 967232 if (code < 111) { /* rl->n */
123 /* length of VLC and sign */
124 26418 len = table_vlc[code][1] + 1;
125 } else {
126 940814 len = table_vlc[MPEG12_RL_NB_ELEMS][1] + 6;
127
128
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 940814 if (alevel < 128)
129 940814 len += 8;
130 else
131 ✗ len += 16;
132 }
133
134 967232 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
135 }
136 }
137 119 }
138
139 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
140 55 static int find_frame_rate_index(AVCodecContext *avctx, MPEG12EncContext *mpeg12)
141 {
142 int i;
143 55 AVRational bestq = (AVRational) {0, 0};
144 AVRational ext;
145 55 AVRational target = av_inv_q(avctx->time_base);
146
147
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 500 for (i = 1; i < 14; i++) {
148
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 499 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
149 i >= 9)
150 54 break;
151
152
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 2225 for (ext.num=1; ext.num <= 4; ext.num++) {
153
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 58740 for (ext.den=1; ext.den <= 32; ext.den++) {
154 56960 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
155
156
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 56960 if (avctx->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
157 26170 continue;
158
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 45784 if (av_gcd(ext.den, ext.num) != 1)
159 14994 continue;
160
161
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 30790 if ( bestq.num==0
162
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 30735 || av_nearer_q(target, bestq, q) < 0
163
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 30597 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
164 193 bestq = q;
165 193 mpeg12->frame_rate_index = i;
166 193 mpeg12->frame_rate_ext.num = ext.num;
167 193 mpeg12->frame_rate_ext.den = ext.den;
168 }
169 }
170 }
171 }
172
173
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 55 if (av_cmp_q(target, bestq))
174 1 return -1;
175 else
176 54 return 0;
177 }
178
179 55 static av_cold int encode_init(AVCodecContext *avctx)
180 {
181 55 MPEG12EncContext *const mpeg12 = avctx->priv_data;
182 int ret;
183
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 55 int max_size = avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ? 16383 : 4095;
184
185
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 55 if (avctx->width > max_size || avctx->height > max_size) {
186 ✗ av_log(avctx, AV_LOG_ERROR, "%s does not support resolutions above %dx%d\n",
187 ✗ CONFIG_SMALL ? avctx->codec->name : avctx->codec->long_name,
188 max_size, max_size);
189 ✗ return AVERROR(EINVAL);
190 }
191
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 55 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
192 ✗ av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
193 ✗ return AVERROR(EINVAL);
194 }
195
196
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 55 if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
197
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 54 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
198 ✗ av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
199 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
200 ✗ return AVERROR(EINVAL);
201 }
202 }
203
204
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 55 if (avctx->profile == AV_PROFILE_UNKNOWN) {
205
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 55 if (avctx->level != AV_LEVEL_UNKNOWN) {
206 ✗ av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
207 ✗ return AVERROR(EINVAL);
208 }
209 /* Main or 4:2:2 */
210 55 avctx->profile = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? AV_PROFILE_MPEG2_MAIN
211
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 55 : AV_PROFILE_MPEG2_422;
212 }
213
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 55 if (avctx->level == AV_LEVEL_UNKNOWN) {
214
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 55 if (avctx->profile == AV_PROFILE_MPEG2_422) { /* 4:2:2 */
215
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 5 if (avctx->width <= 720 && avctx->height <= 608)
216 5 avctx->level = 5; /* Main */
217 else
218 ✗ avctx->level = 2; /* High */
219 } else {
220
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 50 if (avctx->profile != AV_PROFILE_MPEG2_HIGH &&
221
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 50 avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
222 ✗ av_log(avctx, AV_LOG_ERROR,
223 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
224 ✗ return AVERROR(EINVAL);
225 }
226
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 50 if (avctx->width <= 720 && avctx->height <= 576)
227 49 avctx->level = 8; /* Main */
228
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 1 else if (avctx->width <= 1440)
229 1 avctx->level = 6; /* High 1440 */
230 else
231 ✗ avctx->level = 4; /* High */
232 }
233 }
234
235
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 55 if ((ret = ff_mpv_encode_init(avctx)) < 0)
236 ✗ return ret;
237
238
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 55 if (find_frame_rate_index(avctx, mpeg12) < 0) {
239
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 1 if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
240 ✗ av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
241 avctx->time_base.den, avctx->time_base.num);
242 ✗ return AVERROR(EINVAL);
243 } else {
244 1 av_log(avctx, AV_LOG_INFO,
245 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
246 avctx->time_base.den, avctx->time_base.num);
247 }
248 }
249
250
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 55 if (mpeg12->drop_frame_timecode)
251 ✗ mpeg12->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
252
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 55 if (mpeg12->drop_frame_timecode && mpeg12->frame_rate_index != 4) {
253 ✗ av_log(avctx, AV_LOG_ERROR,
254 "Drop frame time code only allowed with 1001/30000 fps\n");
255 ✗ return AVERROR(EINVAL);
256 }
257
258
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 55 if (mpeg12->tc_opt_str) {
259 6 AVRational rate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
260 6 int ret = av_timecode_init_from_string(&mpeg12->tc, rate, mpeg12->tc_opt_str, avctx);
261
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 6 if (ret < 0)
262 ✗ return ret;
263 6 mpeg12->drop_frame_timecode = !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
264 6 mpeg12->timecode_frame_start = mpeg12->tc.start;
265 } else {
266 49 mpeg12->timecode_frame_start = 0; // default is -1
267 }
268
269 55 return 0;
270 }
271
272 307216 static void put_header(MpegEncContext *s, uint32_t header)
273 {
274 307216 align_put_bits(&s->pb);
275 307216 put_bits32(&s->pb, header);
276 307216 }
277
278 /* put sequence header if needed */
279 3576 static void mpeg1_encode_sequence_header(MpegEncContext *s)
280 {
281 3576 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
282 unsigned int vbv_buffer_size, fps, v;
283 int constraint_parameter_flag;
284 3576 AVRational framerate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
285 uint64_t time_code;
286 3576 int64_t best_aspect_error = INT64_MAX;
287 3576 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
288 int aspect_ratio_info;
289
290
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 3576 if (!(s->cur_pic.ptr->f->flags & AV_FRAME_FLAG_KEY))
291 3162 return;
292
293
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 414 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
294 406 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
295
296 /* MPEG-1 header repeated every GOP */
297 414 put_header(s, SEQ_START_CODE);
298
299 414 put_sbits(&s->pb, 12, s->width & 0xFFF);
300 414 put_sbits(&s->pb, 12, s->height & 0xFFF);
301
302
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 6210 for (int i = 1; i < 15; i++) {
303 5796 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
304
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 5796 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
305 1103 error -= (1LL<<32) / ff_mpeg1_aspect[i];
306 else
307 4693 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
308
309 5796 error = FFABS(error);
310
311
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 5796 if (error - 2 <= best_aspect_error) {
312 417 best_aspect_error = error;
313 417 aspect_ratio_info = i;
314 }
315 }
316
317 414 put_bits(&s->pb, 4, aspect_ratio_info);
318 414 put_bits(&s->pb, 4, mpeg12->frame_rate_index);
319
320
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 414 if (s->avctx->rc_max_rate) {
321 153 v = (s->avctx->rc_max_rate + 399) / 400;
322
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 153 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
323 ✗ v = 0x3ffff;
324 } else {
325 261 v = 0x3FFFF;
326 }
327
328
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 414 if (s->avctx->rc_buffer_size)
329 153 vbv_buffer_size = s->avctx->rc_buffer_size;
330 else
331 /* VBV calculation: Scaled so that a VCD has the proper
332 * VBV size of 40 kilobytes */
333 261 vbv_buffer_size = av_rescale_rnd(s->bit_rate, 20, 1151929 / 2, AV_ROUND_ZERO) * 8 * 1024;
334 414 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
335
336 414 put_sbits(&s->pb, 18, v);
337 414 put_bits(&s->pb, 1, 1); // marker
338 414 put_sbits(&s->pb, 10, vbv_buffer_size);
339
340 414 constraint_parameter_flag =
341 825 s->width <= 768 &&
342
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 411 s->height <= 576 &&
343
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 261 s->mb_width * s->mb_height <= 396 &&
344
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 238 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
345
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 232 framerate.num <= framerate.den * 30 &&
346
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 232 s->avctx->me_range &&
347 ✗ s->avctx->me_range < 128 &&
348 ✗ vbv_buffer_size <= 20 &&
349
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 825 v <= 1856000 / 400 &&
350 ✗ s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
351
352 414 put_bits(&s->pb, 1, constraint_parameter_flag);
353
354 414 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
355 414 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
356
357
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 414 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
358 const AVFrameSideData *side_data;
359 361 int width = s->width;
360 361 int height = s->height;
361 int use_seq_disp_ext;
362
363 361 put_header(s, EXT_START_CODE);
364 361 put_bits(&s->pb, 4, 1); // seq ext
365
366 361 put_bits(&s->pb, 1, s->avctx->profile == AV_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
367
368 361 put_bits(&s->pb, 3, s->avctx->profile); // profile
369 361 put_bits(&s->pb, 4, s->avctx->level); // level
370
371 361 put_bits(&s->pb, 1, s->progressive_sequence);
372 361 put_bits(&s->pb, 2, s->chroma_format);
373 361 put_bits(&s->pb, 2, s->width >> 12);
374 361 put_bits(&s->pb, 2, s->height >> 12);
375 361 put_bits(&s->pb, 12, v >> 18); // bitrate ext
376 361 put_bits(&s->pb, 1, 1); // marker
377 361 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
378 361 put_bits(&s->pb, 1, s->low_delay);
379 361 put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
380 361 put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
381
382 361 side_data = av_frame_get_side_data(s->cur_pic.ptr->f, AV_FRAME_DATA_PANSCAN);
383
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 361 if (side_data) {
384 5 const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
385
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 5 if (pan_scan->width && pan_scan->height) {
386 5 width = pan_scan->width >> 4;
387 5 height = pan_scan->height >> 4;
388 }
389 }
390
391 1083 use_seq_disp_ext = (width != s->width ||
392
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 361 height != s->height ||
393
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 361 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
394
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 352 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
395
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 1071 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
396
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 349 mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
397
398
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 361 if (mpeg12->seq_disp_ext == 1 ||
399
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 361 (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
400 12 put_header(s, EXT_START_CODE);
401 12 put_bits(&s->pb, 4, 2); // sequence display extension
402 12 put_bits(&s->pb, 3, mpeg12->video_format); // video_format
403 12 put_bits(&s->pb, 1, 1); // colour_description
404 12 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
405 12 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
406 12 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
407 12 put_bits(&s->pb, 14, width); // display_horizontal_size
408 12 put_bits(&s->pb, 1, 1); // marker_bit
409 12 put_bits(&s->pb, 14, height); // display_vertical_size
410 12 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
411 }
412 }
413
414 414 put_header(s, GOP_START_CODE);
415 414 put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
416 /* time code: we must convert from the real frame rate to a
417 * fake MPEG frame rate in case of low frame rate */
418 414 fps = (framerate.num + framerate.den / 2) / framerate.den;
419 414 time_code = s->cur_pic.ptr->coded_picture_number +
420 414 mpeg12->timecode_frame_start;
421
422 414 mpeg12->gop_picture_number = s->cur_pic.ptr->coded_picture_number;
423
424
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 414 av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
425
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 414 if (mpeg12->drop_frame_timecode)
426 9 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
427
428 414 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
429 414 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
430 414 put_bits(&s->pb, 1, 1);
431 414 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
432 414 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
433 414 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) ||
434
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 414 s->intra_only || !mpeg12->gop_picture_number);
435 414 put_bits(&s->pb, 1, 0); // broken link
436 }
437
438 1776803 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
439 {
440
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 1846002 while (run >= 33) {
441 69199 put_bits(&s->pb, 11, 0x008);
442 69199 run -= 33;
443 }
444 1776803 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
445 1776803 ff_mpeg12_mbAddrIncrTable[run][0]);
446 1776803 }
447
448 481367 static av_always_inline void put_qscale(MpegEncContext *s)
449 {
450 481367 put_bits(&s->pb, 5, s->qscale);
451 481367 }
452
453 299209 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
454 {
455
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 299209 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
456 ✗ put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
457 /* slice_vertical_position_extension */
458 ✗ put_bits(&s->pb, 3, s->mb_y >> 7);
459 } else {
460 299209 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
461 }
462 299209 put_qscale(s);
463 /* slice extra information */
464 299209 put_bits(&s->pb, 1, 0);
465 299209 }
466
467 3576 void ff_mpeg1_encode_picture_header(MpegEncContext *s)
468 {
469 3576 MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
470 const AVFrameSideData *side_data;
471 3576 mpeg1_encode_sequence_header(s);
472
473 /* MPEG-1 picture header */
474 3576 put_header(s, PICTURE_START_CODE);
475 /* temporal reference */
476
477 // RAL: s->picture_number instead of s->fake_picture_number
478 3576 put_bits(&s->pb, 10,
479 3576 (s->picture_number - mpeg12->gop_picture_number) & 0x3ff);
480 3576 put_bits(&s->pb, 3, s->pict_type);
481
482 3576 s->vbv_delay_pos = put_bytes_count(&s->pb, 0);
483 3576 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
484
485 // RAL: Forward f_code also needed for B-frames
486
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 3576 if (s->pict_type == AV_PICTURE_TYPE_P ||
487
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 1121 s->pict_type == AV_PICTURE_TYPE_B) {
488 3162 put_bits(&s->pb, 1, 0); /* half pel coordinates */
489
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 3162 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
490 427 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
491 else
492 2735 put_bits(&s->pb, 3, 7); /* forward_f_code */
493 }
494
495 // RAL: Backward f_code necessary for B-frames
496
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 3576 if (s->pict_type == AV_PICTURE_TYPE_B) {
497 707 put_bits(&s->pb, 1, 0); /* half pel coordinates */
498
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 707 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
499 144 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
500 else
501 563 put_bits(&s->pb, 3, 7); /* backward_f_code */
502 }
503
504 3576 put_bits(&s->pb, 1, 0); /* extra bit picture */
505
506 3576 s->frame_pred_frame_dct = 1;
507
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 3576 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
508 3096 put_header(s, EXT_START_CODE);
509 3096 put_bits(&s->pb, 4, 8); /* pic ext */
510
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 3096 if (s->pict_type == AV_PICTURE_TYPE_P ||
511
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 924 s->pict_type == AV_PICTURE_TYPE_B) {
512 2735 put_bits(&s->pb, 4, s->f_code);
513 2735 put_bits(&s->pb, 4, s->f_code);
514 } else {
515 361 put_bits(&s->pb, 8, 255);
516 }
517
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 3096 if (s->pict_type == AV_PICTURE_TYPE_B) {
518 563 put_bits(&s->pb, 4, s->b_code);
519 563 put_bits(&s->pb, 4, s->b_code);
520 } else {
521 2533 put_bits(&s->pb, 8, 255);
522 }
523 3096 put_bits(&s->pb, 2, s->intra_dc_precision);
524
525
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 3096 av_assert0(s->picture_structure == PICT_FRAME);
526 3096 put_bits(&s->pb, 2, s->picture_structure);
527
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 3096 if (s->progressive_sequence)
528 2146 put_bits(&s->pb, 1, 0); /* no repeat */
529 else
530 950 put_bits(&s->pb, 1, !!(s->cur_pic.ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST));
531 /* XXX: optimize the generation of this flag with entropy measures */
532 3096 s->frame_pred_frame_dct = s->progressive_sequence;
533
534 3096 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
535 3096 put_bits(&s->pb, 1, s->concealment_motion_vectors);
536 3096 put_bits(&s->pb, 1, s->q_scale_type);
537 3096 put_bits(&s->pb, 1, s->intra_vlc_format);
538 3096 put_bits(&s->pb, 1, s->alternate_scan);
539 3096 put_bits(&s->pb, 1, s->repeat_first_field);
540 3096 s->progressive_frame = s->progressive_sequence;
541 /* chroma_420_type */
542
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 5842 put_bits(&s->pb, 1, s->chroma_format ==
543 2746 CHROMA_420 ? s->progressive_frame : 0);
544 3096 put_bits(&s->pb, 1, s->progressive_frame);
545 3096 put_bits(&s->pb, 1, 0); /* composite_display_flag */
546 }
547
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 3576 if (mpeg12->scan_offset) {
548 int i;
549
550 ✗ put_header(s, USER_START_CODE);
551 ✗ for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
552 ✗ put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
553 }
554 3576 side_data = av_frame_get_side_data(s->cur_pic.ptr->f,
555 AV_FRAME_DATA_STEREO3D);
556
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 3576 if (side_data) {
557 ✗ const AVStereo3D *stereo = (AVStereo3D *)side_data->data;
558 uint8_t fpa_type;
559
560 ✗ switch (stereo->type) {
561 ✗ case AV_STEREO3D_SIDEBYSIDE:
562 ✗ fpa_type = 0x03;
563 ✗ break;
564 ✗ case AV_STEREO3D_TOPBOTTOM:
565 ✗ fpa_type = 0x04;
566 ✗ break;
567 ✗ case AV_STEREO3D_2D:
568 ✗ fpa_type = 0x08;
569 ✗ break;
570 ✗ case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
571 ✗ fpa_type = 0x23;
572 ✗ break;
573 ✗ default:
574 ✗ fpa_type = 0;
575 ✗ break;
576 }
577
578 ✗ if (fpa_type != 0) {
579 ✗ put_header(s, USER_START_CODE);
580 ✗ put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
581 ✗ put_bits(&s->pb, 8, 'P');
582 ✗ put_bits(&s->pb, 8, '3');
583 ✗ put_bits(&s->pb, 8, 'D');
584 ✗ put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
585
586 ✗ put_bits(&s->pb, 1, 1); // reserved_bit
587 ✗ put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
588 ✗ put_bits(&s->pb, 8, 0x04); // reserved_data[0]
589 ✗ put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
590 }
591 }
592
593
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 3576 if (CONFIG_MPEG2VIDEO_ENCODER && mpeg12->a53_cc) {
594 3096 side_data = av_frame_get_side_data(s->cur_pic.ptr->f,
595 AV_FRAME_DATA_A53_CC);
596
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 3096 if (side_data) {
597
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✗ Branch 3 not taken.
 269 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
598 134 int i = 0;
599
600 134 put_header (s, USER_START_CODE);
601
602 134 put_bits(&s->pb, 8, 'G'); // user_identifier
603 134 put_bits(&s->pb, 8, 'A');
604 134 put_bits(&s->pb, 8, '9');
605 134 put_bits(&s->pb, 8, '4');
606 134 put_bits(&s->pb, 8, 3); // user_data_type_code
607 134 put_bits(&s->pb, 8,
608 134 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
609 134 put_bits(&s->pb, 8, 0xff); // em_data
610
611
2/2
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 8174 for (i = 0; i < side_data->size; i++)
612 8040 put_bits(&s->pb, 8, side_data->data[i]);
613
614 134 put_bits(&s->pb, 8, 0xff); // marker_bits
615 } else {
616 1 av_log(s->avctx, AV_LOG_WARNING,
617 "Closed Caption size (%"SIZE_SPECIFIER") can not exceed "
618 1 "93 bytes and must be a multiple of 3\n", side_data->size);
619 }
620 }
621 }
622
623 3576 s->mb_y = 0;
624 3576 ff_mpeg1_encode_slice_header(s);
625 3576 }
626
627 1455658 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
628 int has_mv, int field_motion)
629 {
630 1455658 put_bits(&s->pb, n, bits);
631
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 1455658 if (!s->frame_pred_frame_dct) {
632
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 698812 if (has_mv)
633 /* motion_type: frame/field */
634 364218 put_bits(&s->pb, 2, 2 - field_motion);
635 698812 put_bits(&s->pb, 1, s->interlaced_dct);
636 }
637 1455658 }
638
639 // RAL: Parameter added: f_or_b_code
640 3283710 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
641 {
642
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 3283710 if (val == 0) {
643 /* zero vector, corresponds to ff_mpeg12_mbMotionVectorTable[0] */
644 1313138 put_bits(&s->pb, 1, 0x01);
645 } else {
646 int code, sign, bits;
647 1970572 int bit_size = f_or_b_code - 1;
648 1970572 int range = 1 << bit_size;
649 /* modulo encoding */
650 1970572 val = sign_extend(val, 5 + bit_size);
651
652
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 1970572 if (val >= 0) {
653 950640 val--;
654 950640 code = (val >> bit_size) + 1;
655 950640 bits = val & (range - 1);
656 950640 sign = 0;
657 } else {
658 1019932 val = -val;
659 1019932 val--;
660 1019932 code = (val >> bit_size) + 1;
661 1019932 bits = val & (range - 1);
662 1019932 sign = 1;
663 }
664
665 av_assert2(code > 0 && code <= 16);
666
667 1970572 put_bits(&s->pb,
668 1970572 ff_mpeg12_mbMotionVectorTable[code][1],
669 1970572 ff_mpeg12_mbMotionVectorTable[code][0]);
670
671 1970572 put_bits(&s->pb, 1, sign);
672
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 1970572 if (bit_size > 0)
673 1418848 put_bits(&s->pb, bit_size, bits);
674 }
675 3283710 }
676
677 3438044 static inline void encode_dc(MpegEncContext *s, int diff, int component)
678 {
679 3438044 unsigned int diff_u = diff + 255;
680
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 3438044 if (diff_u >= 511) {
681 int index;
682
683
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✓ Branch 1 taken 48924 times.
 162210 if (diff < 0) {
684 113286 index = av_log2_16bit(-2 * diff);
685 113286 diff--;
686 } else {
687 48924 index = av_log2_16bit(2 * diff);
688 }
689
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 162210 if (component == 0)
690 91380 put_bits(&s->pb,
691 91380 ff_mpeg12_vlc_dc_lum_bits[index] + index,
692 91380 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
693 91380 av_zero_extend(diff, index));
694 else
695 70830 put_bits(&s->pb,
696 70830 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
697 70830 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
698 70830 av_zero_extend(diff, index));
699 } else {
700
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 3275834 if (component == 0)
701 1806968 put_bits(&s->pb,
702 1806968 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
703 1806968 mpeg1_lum_dc_uni[diff + 255] >> 8);
704 else
705 1468866 put_bits(&s->pb,
706 1468866 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
707 1468866 mpeg1_chr_dc_uni[diff + 255] >> 8);
708 }
709 3438044 }
710
711 7010842 static void mpeg1_encode_block(MpegEncContext *s, const int16_t *block, int n)
712 {
713 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
714 int code, component;
715 7010842 const uint16_t (*table_vlc)[2] = ff_mpeg1_vlc_table;
716
717 7010842 last_index = s->block_last_index[n];
718
719 /* DC coef */
720
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 7010842 if (s->mb_intra) {
721
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 3438044 component = (n <= 3 ? 0 : (n & 1) + 1);
722 3438044 dc = block[0]; /* overflow is impossible */
723 3438044 diff = dc - s->last_dc[component];
724 3438044 encode_dc(s, diff, component);
725 3438044 s->last_dc[component] = dc;
726 3438044 i = 1;
727
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 3438044 if (s->intra_vlc_format)
728 2641700 table_vlc = ff_mpeg2_vlc_table;
729 } else {
730 /* encode the first coefficient: needs to be done here because
731 * it is handled slightly differently */
732 3572798 level = block[0];
733
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 3572798 if (abs(level) == 1) {
734 1068212 code = ((uint32_t)level >> 31); /* the sign bit */
735 1068212 put_bits(&s->pb, 2, code | 0x02);
736 1068212 i = 1;
737 } else {
738 2504586 i = 0;
739 2504586 last_non_zero = -1;
740 2504586 goto next_coef;
741 }
742 }
743
744 /* now quantify & encode AC coefs */
745 4506256 last_non_zero = i - 1;
746
747
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 170579707 for (; i <= last_index; i++) {
748 163568865 j = s->intra_scantable.permutated[i];
749 163568865 level = block[j];
750
751 166073451 next_coef:
752 /* encode using VLC */
753
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 166073451 if (level != 0) {
754 68880903 run = i - last_non_zero - 1;
755
756 68880903 alevel = level;
757 68880903 MASK_ABS(sign, alevel);
758 68880903 sign &= 1;
759
760
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 68880903 if (alevel <= mpeg12_max_level[run]) {
761 66712686 code = mpeg12_index_run[run] + alevel - 1;
762 /* store the VLC & sign at once */
763 66712686 put_bits(&s->pb, table_vlc[code][1] + 1,
764 66712686 (table_vlc[code][0] << 1) + sign);
765 } else {
766 /* Escape seems to be pretty rare <5% so I do not optimize it;
767 * the following value is the common escape value for both
768 * possible tables (i.e. table_vlc[111]). */
769 2168217 put_bits(&s->pb, 6, 0x01);
770 /* escape: only clip in this case */
771 2168217 put_bits(&s->pb, 6, run);
772
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 2168217 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
773
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✗ Branch 1 not taken.
 82680 if (alevel < 128) {
774 82680 put_sbits(&s->pb, 8, level);
775 } else {
776 ✗ if (level < 0)
777 ✗ put_bits(&s->pb, 16, 0x8001 + level + 255);
778 else
779 ✗ put_sbits(&s->pb, 16, level);
780 }
781 } else {
782 2085537 put_sbits(&s->pb, 12, level);
783 }
784 }
785 68880903 last_non_zero = i;
786 }
787 }
788 /* end of block */
789 7010842 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
790 7010842 }
791
792 1910328 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
793 const int16_t block[8][64],
794 int motion_x, int motion_y,
795 int mb_block_count,
796 int chroma_y_shift)
797 {
798 /* MPEG-1 is always 420. */
799 #define IS_MPEG1(s) (chroma_y_shift == 1 && (s)->codec_id == AV_CODEC_ID_MPEG1VIDEO)
800 int i, cbp;
801 1910328 const int mb_x = s->mb_x;
802 1910328 const int mb_y = s->mb_y;
803
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 1910328 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
804
805 /* compute cbp */
806 1910328 cbp = 0;
807
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 14658206 for (i = 0; i < mb_block_count; i++)
808
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 12747878 if (s->block_last_index[i] >= 0)
809 7010842 cbp |= 1 << (mb_block_count - 1 - i);
810
811
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✓ Branch 5 taken 20223 times.
 1910328 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
812
2/2
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 423114 (mb_x != s->mb_width - 1 ||
813
6/6
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✓ Branch 4 taken 552 times.
✓ Branch 5 taken 8908 times.
 12180 (mb_y != s->end_mb_y - 1 && IS_MPEG1(s))) &&
814
4/4
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 411486 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
815
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 282303 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
816 22008 (((s->mv_dir & MV_DIR_FORWARD)
817 20311 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
818
4/4
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✓ Branch 1 taken 1697 times.
✓ Branch 2 taken 4342 times.
✓ Branch 3 taken 17666 times.
 44016 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
819 22008 ((s->mv_dir & MV_DIR_BACKWARD)
820 21679 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
821
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 22008 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
822 133525 s->mb_skip_run++;
823 133525 s->qscale -= s->dquant;
824 133525 s->misc_bits++;
825 133525 s->last_bits++;
826
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 133525 if (s->pict_type == AV_PICTURE_TYPE_P) {
827 129183 s->last_mv[0][0][0] =
828 129183 s->last_mv[0][0][1] =
829 129183 s->last_mv[0][1][0] =
830 129183 s->last_mv[0][1][1] = 0;
831 }
832 } else {
833
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 1776803 if (first_mb) {
834
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 326392 av_assert0(s->mb_skip_run == 0);
835 326392 encode_mb_skip_run(s, s->mb_x);
836 } else {
837 1450411 encode_mb_skip_run(s, s->mb_skip_run);
838 }
839
840
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 1776803 if (s->pict_type == AV_PICTURE_TYPE_I) {
841
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 400936 if (s->dquant && cbp) {
842 /* macroblock_type: macroblock_quant = 1 */
843 43090 put_mb_modes(s, 2, 1, 0, 0);
844 43090 put_qscale(s);
845 } else {
846 /* macroblock_type: macroblock_quant = 0 */
847 357846 put_mb_modes(s, 1, 1, 0, 0);
848 357846 s->qscale -= s->dquant;
849 }
850 400936 s->misc_bits += get_bits_diff(s);
851 400936 s->i_count++;
852
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 1375867 } else if (s->mb_intra) {
853
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 73651 if (s->dquant && cbp) {
854 11835 put_mb_modes(s, 6, 0x01, 0, 0);
855 11835 put_qscale(s);
856 } else {
857 61816 put_mb_modes(s, 5, 0x03, 0, 0);
858 61816 s->qscale -= s->dquant;
859 }
860 73651 s->misc_bits += get_bits_diff(s);
861 73651 s->i_count++;
862 73651 memset(s->last_mv, 0, sizeof(s->last_mv));
863
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 1302216 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
864
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 721273 if (s->mv_type == MV_TYPE_16X16) {
865
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 698424 if (cbp != 0) {
866
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✓ Branch 1 taken 512204 times.
 573435 if ((motion_x | motion_y) == 0) {
867
2/2
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 61231 if (s->dquant) {
868 /* macroblock_pattern & quant */
869 1554 put_mb_modes(s, 5, 1, 0, 0);
870 1554 put_qscale(s);
871 } else {
872 /* macroblock_pattern only */
873 59677 put_mb_modes(s, 2, 1, 0, 0);
874 }
875 61231 s->misc_bits += get_bits_diff(s);
876 } else {
877
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✓ Branch 1 taken 439815 times.
 512204 if (s->dquant) {
878 72389 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
879 72389 put_qscale(s);
880 } else {
881 439815 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
882 }
883 512204 s->misc_bits += get_bits_diff(s);
884 // RAL: f_code parameter added
885 512204 mpeg1_encode_motion(s,
886 512204 motion_x - s->last_mv[0][0][0],
887 s->f_code);
888 // RAL: f_code parameter added
889 512204 mpeg1_encode_motion(s,
890 512204 motion_y - s->last_mv[0][0][1],
891 s->f_code);
892 512204 s->mv_bits += get_bits_diff(s);
893 }
894 } else {
895 124989 put_bits(&s->pb, 3, 1); /* motion only */
896
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 124989 if (!s->frame_pred_frame_dct)
897 17533 put_bits(&s->pb, 2, 2); /* motion_type: frame */
898 124989 s->misc_bits += get_bits_diff(s);
899 // RAL: f_code parameter added
900 124989 mpeg1_encode_motion(s,
901 124989 motion_x - s->last_mv[0][0][0],
902 s->f_code);
903 // RAL: f_code parameter added
904 124989 mpeg1_encode_motion(s,
905 124989 motion_y - s->last_mv[0][0][1],
906 s->f_code);
907 124989 s->qscale -= s->dquant;
908 124989 s->mv_bits += get_bits_diff(s);
909 }
910 698424 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
911 698424 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
912 } else {
913 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
914
915
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✓ Branch 1 taken 1505 times.
 22849 if (cbp) {
916
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 21344 if (s->dquant) {
917 ✗ put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
918 ✗ put_qscale(s);
919 } else {
920 21344 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
921 }
922 } else {
923 1505 put_bits(&s->pb, 3, 1); /* motion only */
924 1505 put_bits(&s->pb, 2, 1); /* motion_type: field */
925 1505 s->qscale -= s->dquant;
926 }
927 22849 s->misc_bits += get_bits_diff(s);
928
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 68547 for (i = 0; i < 2; i++) {
929 45698 put_bits(&s->pb, 1, s->field_select[0][i]);
930 45698 mpeg1_encode_motion(s,
931 45698 s->mv[0][i][0] - s->last_mv[0][i][0],
932 s->f_code);
933 45698 mpeg1_encode_motion(s,
934 45698 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
935 s->f_code);
936 45698 s->last_mv[0][i][0] = s->mv[0][i][0];
937 45698 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
938 }
939 22849 s->mv_bits += get_bits_diff(s);
940 }
941
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 721273 if (cbp) {
942
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 594779 if (chroma_y_shift) {
943 519967 put_bits(&s->pb,
944 519967 ff_mpeg12_mbPatTable[cbp][1],
945 519967 ff_mpeg12_mbPatTable[cbp][0]);
946 } else {
947 74812 put_bits(&s->pb,
948 74812 ff_mpeg12_mbPatTable[cbp >> 2][1],
949 74812 ff_mpeg12_mbPatTable[cbp >> 2][0]);
950 74812 put_sbits(&s->pb, 2, cbp);
951 }
952 }
953 } else {
954
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 580943 if (s->mv_type == MV_TYPE_16X16) {
955
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 488110 if (cbp) { // With coded bloc pattern
956
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✓ Branch 1 taken 259307 times.
 312597 if (s->dquant) {
957
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 53290 if (s->mv_dir == MV_DIR_FORWARD)
958 11218 put_mb_modes(s, 6, 3, 1, 0);
959 else
960 42072 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
961 53290 put_qscale(s);
962 } else {
963 259307 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
964 }
965 } else { // No coded bloc pattern
966 175513 put_bits(&s->pb, 5 - s->mv_dir, 2);
967
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 175513 if (!s->frame_pred_frame_dct)
968 82021 put_bits(&s->pb, 2, 2); /* motion_type: frame */
969 175513 s->qscale -= s->dquant;
970 }
971 488110 s->misc_bits += get_bits_diff(s);
972
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 488110 if (s->mv_dir & MV_DIR_FORWARD) {
973 351301 mpeg1_encode_motion(s,
974 351301 s->mv[0][0][0] - s->last_mv[0][0][0],
975 s->f_code);
976 351301 mpeg1_encode_motion(s,
977 351301 s->mv[0][0][1] - s->last_mv[0][0][1],
978 s->f_code);
979 351301 s->last_mv[0][0][0] =
980 351301 s->last_mv[0][1][0] = s->mv[0][0][0];
981 351301 s->last_mv[0][0][1] =
982 351301 s->last_mv[0][1][1] = s->mv[0][0][1];
983 }
984
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 488110 if (s->mv_dir & MV_DIR_BACKWARD) {
985 369943 mpeg1_encode_motion(s,
986 369943 s->mv[1][0][0] - s->last_mv[1][0][0],
987 s->b_code);
988 369943 mpeg1_encode_motion(s,
989 369943 s->mv[1][0][1] - s->last_mv[1][0][1],
990 s->b_code);
991 369943 s->last_mv[1][0][0] =
992 369943 s->last_mv[1][1][0] = s->mv[1][0][0];
993 369943 s->last_mv[1][0][1] =
994 369943 s->last_mv[1][1][1] = s->mv[1][0][1];
995 }
996 } else {
997 av_assert2(s->mv_type == MV_TYPE_FIELD);
998 av_assert2(!s->frame_pred_frame_dct);
999
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 92833 if (cbp) { // With coded bloc pattern
1000
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 73695 if (s->dquant) {
1001 ✗ if (s->mv_dir == MV_DIR_FORWARD)
1002 ✗ put_mb_modes(s, 6, 3, 1, 1);
1003 else
1004 ✗ put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
1005 ✗ put_qscale(s);
1006 } else {
1007 73695 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
1008 }
1009 } else { // No coded bloc pattern
1010 19138 put_bits(&s->pb, 5 - s->mv_dir, 2);
1011 19138 put_bits(&s->pb, 2, 1); /* motion_type: field */
1012 19138 s->qscale -= s->dquant;
1013 }
1014 92833 s->misc_bits += get_bits_diff(s);
1015
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 92833 if (s->mv_dir & MV_DIR_FORWARD) {
1016
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 177573 for (i = 0; i < 2; i++) {
1017 118382 put_bits(&s->pb, 1, s->field_select[0][i]);
1018 118382 mpeg1_encode_motion(s,
1019 118382 s->mv[0][i][0] - s->last_mv[0][i][0],
1020 s->f_code);
1021 118382 mpeg1_encode_motion(s,
1022 118382 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
1023 s->f_code);
1024 118382 s->last_mv[0][i][0] = s->mv[0][i][0];
1025 118382 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
1026 }
1027 }
1028
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 92833 if (s->mv_dir & MV_DIR_BACKWARD) {
1029
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 179007 for (i = 0; i < 2; i++) {
1030 119338 put_bits(&s->pb, 1, s->field_select[1][i]);
1031 119338 mpeg1_encode_motion(s,
1032 119338 s->mv[1][i][0] - s->last_mv[1][i][0],
1033 s->b_code);
1034 119338 mpeg1_encode_motion(s,
1035 119338 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
1036 s->b_code);
1037 119338 s->last_mv[1][i][0] = s->mv[1][i][0];
1038 119338 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1039 }
1040 }
1041 }
1042 580943 s->mv_bits += get_bits_diff(s);
1043
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 580943 if (cbp) {
1044
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 386292 if (chroma_y_shift) {
1045 206130 put_bits(&s->pb,
1046 206130 ff_mpeg12_mbPatTable[cbp][1],
1047 206130 ff_mpeg12_mbPatTable[cbp][0]);
1048 } else {
1049 180162 put_bits(&s->pb,
1050 180162 ff_mpeg12_mbPatTable[cbp >> 2][1],
1051 180162 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1052 180162 put_sbits(&s->pb, 2, cbp);
1053 }
1054 }
1055 }
1056
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 13722235 for (i = 0; i < mb_block_count; i++)
1057
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 11945432 if (cbp & (1 << (mb_block_count - 1 - i)))
1058 7010842 mpeg1_encode_block(s, block[i], i);
1059 1776803 s->mb_skip_run = 0;
1060
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 1776803 if (s->mb_intra)
1061 474587 s->i_tex_bits += get_bits_diff(s);
1062 else
1063 1302216 s->p_tex_bits += get_bits_diff(s);
1064 }
1065 1910328 }
1066
1067 1910328 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1068 int motion_x, int motion_y)
1069 {
1070
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 1910328 if (s->chroma_format == CHROMA_420)
1071 1267373 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6, 1);
1072 else
1073 642955 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8, 0);
1074 1910328 }
1075
1076 55 static av_cold void mpeg12_encode_init_static(void)
1077 {
1078 55 ff_rl_init_level_run(mpeg12_max_level, mpeg12_index_run,
1079 ff_mpeg12_run, ff_mpeg12_level, MPEG12_RL_NB_ELEMS);
1080
1081 55 ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1082 ff_mpeg1_vlc_table, uni_mpeg1_ac_vlc_len);
1083 55 ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1084 ff_mpeg2_vlc_table, uni_mpeg2_ac_vlc_len);
1085
1086 /* build unified dc encoding tables */
1087
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 28160 for (int i = -255; i < 256; i++) {
1088 int adiff, index;
1089 int bits, code;
1090 28105 int diff = i;
1091
1092 28105 adiff = FFABS(diff);
1093
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 28105 if (diff < 0)
1094 14025 diff--;
1095 28105 index = av_log2(2 * adiff);
1096
1097 28105 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1098 28105 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1099 28105 av_zero_extend(diff, index);
1100 28105 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1101
1102 28105 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1103 28105 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1104 28105 av_zero_extend(diff, index);
1105 28105 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1106 }
1107
1108
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 440 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1109
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 6308610 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1110 int len;
1111
1112
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✓ Branch 1 taken 6307840 times.
 6308225 if (mv == 0) {
1113 385 len = 1; /* ff_mpeg12_mbMotionVectorTable[0][1] */
1114 } else {
1115 int val, bit_size, code;
1116
1117 6307840 bit_size = f_code - 1;
1118
1119 6307840 val = mv;
1120
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 6307840 if (val < 0)
1121 3153920 val = -val;
1122 6307840 val--;
1123 6307840 code = (val >> bit_size) + 1;
1124
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 6307840 if (code < 17)
1125 223520 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1126 1 + bit_size;
1127 else
1128 6084320 len = 10 /* ff_mpeg12_mbMotionVectorTable[16][1] */ +
1129 2 + bit_size;
1130 }
1131
1132 6308225 mv_penalty[f_code][mv + MAX_DMV] = len;
1133 }
1134
1135
1136
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 440 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1137
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 223905 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1138 223520 fcode_tab[mv + MAX_MV] = f_code;
1139 55 }
1140
1141 55 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1142 {
1143 static AVOnce init_static_once = AV_ONCE_INIT;
1144
1145 55 s->y_dc_scale_table =
1146 55 s->c_dc_scale_table = ff_mpeg12_dc_scale_table[s->intra_dc_precision];
1147
1148 55 s->me.mv_penalty = mv_penalty;
1149 55 s->fcode_tab = fcode_tab;
1150
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 55 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1151 11 s->min_qcoeff = -255;
1152 11 s->max_qcoeff = 255;
1153 } else {
1154 44 s->min_qcoeff = -2047;
1155 44 s->max_qcoeff = 2047;
1156 44 s->mpeg_quant = 1;
1157 }
1158
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 55 if (s->intra_vlc_format) {
1159 13 s->intra_ac_vlc_length =
1160 13 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1161 } else {
1162 42 s->intra_ac_vlc_length =
1163 42 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1164 }
1165 55 s->inter_ac_vlc_length =
1166 55 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1167
1168 55 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1169 55 }
1170
1171 #define OFFSET(x) offsetof(MPEG12EncContext, x)
1172 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1173 #define COMMON_OPTS \
1174 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1175 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1176 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1177 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1178 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1179 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1180 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1181 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1182 FF_MPV_COMMON_BFRAME_OPTS
1183
1184 static const AVOption mpeg1_options[] = {
1185 COMMON_OPTS
1186 FF_MPV_COMMON_OPTS
1187 FF_MPV_COMMON_MOTION_EST_OPTS
1188 { NULL },
1189 };
1190
1191 static const AVOption mpeg2_options[] = {
1192 COMMON_OPTS
1193 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1194 FF_MPV_OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1195 { "non_linear_quant", "Use nonlinear quantizer.", FF_MPV_OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1196 { "alternate_scan", "Enable alternate scantable.", FF_MPV_OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1197 { "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
1198 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, .unit = "seq_disp_ext" },
1199 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, .unit = "seq_disp_ext" },
1200 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, .unit = "seq_disp_ext" },
1201 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, .unit = "seq_disp_ext" },
1202 { "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, .unit = "video_format" },
1203 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, .unit = "video_format" },
1204 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, .unit = "video_format" },
1205 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, .unit = "video_format" },
1206 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, .unit = "video_format" },
1207 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, .unit = "video_format" },
1208 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, .unit = "video_format" },
1209 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, .unit = "avctx.level"
1210 { LEVEL("high", 4) },
1211 { LEVEL("high1440", 6) },
1212 { LEVEL("main", 8) },
1213 { LEVEL("low", 10) },
1214 #undef LEVEL
1215 FF_MPV_COMMON_OPTS
1216 FF_MPV_COMMON_MOTION_EST_OPTS
1217 FF_MPEG2_PROFILE_OPTS
1218 { NULL },
1219 };
1220
1221 #define mpeg12_class(x) \
1222 static const AVClass mpeg ## x ## _class = { \
1223 .class_name = "mpeg" # x "video encoder", \
1224 .item_name = av_default_item_name, \
1225 .option = mpeg ## x ## _options, \
1226 .version = LIBAVUTIL_VERSION_INT, \
1227 };
1228
1229 mpeg12_class(1)
1230 mpeg12_class(2)
1231
1232 const FFCodec ff_mpeg1video_encoder = {
1233 .p.name = "mpeg1video",
1234 CODEC_LONG_NAME("MPEG-1 video"),
1235 .p.type = AVMEDIA_TYPE_VIDEO,
1236 .p.id = AV_CODEC_ID_MPEG1VIDEO,
1237 .priv_data_size = sizeof(MPEG12EncContext),
1238 .init = encode_init,
1239 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1240 .close = ff_mpv_encode_end,
1241 .p.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1242 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1243 AV_PIX_FMT_NONE },
1244 .color_ranges = AVCOL_RANGE_MPEG,
1245 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1246 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1247 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1248 .p.priv_class = &mpeg1_class,
1249 };
1250
1251 const FFCodec ff_mpeg2video_encoder = {
1252 .p.name = "mpeg2video",
1253 CODEC_LONG_NAME("MPEG-2 video"),
1254 .p.type = AVMEDIA_TYPE_VIDEO,
1255 .p.id = AV_CODEC_ID_MPEG2VIDEO,
1256 .priv_data_size = sizeof(MPEG12EncContext),
1257 .init = encode_init,
1258 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1259 .close = ff_mpv_encode_end,
1260 .p.supported_framerates = ff_mpeg2_frame_rate_tab,
1261 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1262 AV_PIX_FMT_YUV422P,
1263 AV_PIX_FMT_NONE },
1264 .color_ranges = AVCOL_RANGE_MPEG,
1265 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1266 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1267 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1268 .p.priv_class = &mpeg2_class,
1269 };
1270 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
1271