FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg4videoenc.c
Date: 2025-06-23 20:06:14
Exec Total Coverage
Lines: 613 732 83.7%
Functions: 25 25 100.0%
Branches: 284 398 71.4%
Line Branch Exec Source
1 /*
2 * MPEG-4 encoder
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 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 #include "libavutil/attributes.h"
24 #include "libavutil/log.h"
25 #include "libavutil/mem.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/thread.h"
28 #include "codec_internal.h"
29 #include "mpegvideo.h"
30 #include "h263.h"
31 #include "h263enc.h"
32 #include "mpeg4video.h"
33 #include "mpeg4videodata.h"
34 #include "mpeg4videodefs.h"
35 #include "mpeg4videoenc.h"
36 #include "mpegvideoenc.h"
37 #include "profiles.h"
38 #include "put_bits.h"
39 #include "version.h"
40
41 /**
42 * Minimal fcode that a motion vector component would need.
43 */
44 static uint8_t fcode_tab[MAX_MV*2+1];
45
46 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
47 * differences in MPEG-4. Unified in the sense that the specification specifies
48 * this encoding in several steps. */
49 static uint8_t uni_DCtab_lum_len[512];
50 static uint8_t uni_DCtab_chrom_len[512];
51 static uint16_t uni_DCtab_lum_bits[512];
52 static uint16_t uni_DCtab_chrom_bits[512];
53
54 /* Unified encoding tables for run length encoding of coefficients.
55 * Unified in the sense that the specification specifies the encoding in several steps. */
56 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
57 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
58 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
59 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
60
61 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
62 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
63 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
64
65 /* MPEG-4
66 * inter
67 * max level: 24/6
68 * max run: 53/63
69 *
70 * intra
71 * max level: 53/16
72 * max run: 29/41
73 */
74
75 typedef struct Mpeg4EncContext {
76 MPVMainEncContext m;
77 /// number of bits to represent the fractional part of time
78 int time_increment_bits;
79 } Mpeg4EncContext;
80
81 2665 static inline Mpeg4EncContext *mainctx_to_mpeg4(MPVMainEncContext *m)
82 {
83 2665 return (Mpeg4EncContext*)m;
84 }
85
86 /**
87 * Return the number of bits that encoding the 8x8 block in block would need.
88 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
89 */
90 585288 static inline int get_block_rate(MPVEncContext *const s, int16_t block[64],
91 int block_last_index, const uint8_t scantable[64])
92 {
93 585288 int last = 0;
94 int j;
95 585288 int rate = 0;
96
97
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 12547868 for (j = 1; j <= block_last_index; j++) {
98 11962580 const int index = scantable[j];
99 11962580 int level = block[index];
100
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 11962580 if (level) {
101 5655201 level += 64;
102
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 5655201 if ((level & (~127)) == 0) {
103
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 5653593 if (j < block_last_index)
104 5215921 rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
105 else
106 437672 rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
107 } else
108 1608 rate += s->ac_esc_length;
109
110 5655201 last = j;
111 }
112 }
113
114 585288 return rate;
115 }
116
117 /**
118 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
119 * This function also restores s->c.block_last_index.
120 * @param[in,out] block MB coefficients, these will be restored
121 * @param[in] dir ac prediction direction for each 8x8 block
122 * @param[out] st scantable for each 8x8 block
123 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
124 */
125 48774 static inline void restore_ac_coeffs(MPVEncContext *const s, int16_t block[6][64],
126 const int dir[6], const uint8_t *st[6],
127 const int zigzag_last_index[6])
128 {
129 int i, n;
130 48774 memcpy(s->c.block_last_index, zigzag_last_index, sizeof(int) * 6);
131
132
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 341418 for (n = 0; n < 6; n++) {
133 292644 int16_t *ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16;
134
135 292644 st[n] = s->c.intra_scantable.permutated;
136
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 292644 if (dir[n]) {
137 /* top prediction */
138
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 641160 for (i = 1; i < 8; i++)
139 561015 block[n][s->c.idsp.idct_permutation[i]] = ac_val[i + 8];
140 } else {
141 /* left prediction */
142
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 1699992 for (i = 1; i < 8; i++)
143 1487493 block[n][s->c.idsp.idct_permutation[i << 3]] = ac_val[i];
144 }
145 }
146 48774 }
147
148 /**
149 * Predict the dc.
150 * @param n block index (0-3 are luma, 4-5 are chroma)
151 * @param dir_ptr pointer to an integer where the prediction direction will be stored
152 */
153 1291776 static int mpeg4_pred_dc(MpegEncContext *s, int n, int *dir_ptr)
154 {
155 1291776 const int16_t *const dc_val = s->dc_val + s->block_index[n];
156 1291776 const int wrap = s->block_wrap[n];
157
158 /* B C
159 * A X
160 */
161 1291776 const int a = dc_val[-1];
162 1291776 const int b = dc_val[-1 - wrap];
163 1291776 const int c = dc_val[-wrap];
164 int pred;
165
166 // There is no need for out-of-slice handling here, as all values are set
167 // appropriately when a new slice is opened.
168
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 1291776 if (abs(a - b) < abs(b - c)) {
169 452403 pred = c;
170 452403 *dir_ptr = 1; /* top */
171 } else {
172 839373 pred = a;
173 839373 *dir_ptr = 0; /* left */
174 }
175 1291776 return pred;
176 }
177
178 /**
179 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
180 * This function will also update s->c.block_last_index and s->c.ac_val.
181 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
182 * @param[in] dir ac prediction direction for each 8x8 block
183 * @param[out] st scantable for each 8x8 block
184 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
185 */
186 48774 static inline int decide_ac_pred(MPVEncContext *const s, int16_t block[6][64],
187 const int dir[6], const uint8_t *st[6],
188 int zigzag_last_index[6])
189 {
190 48774 int score = 0;
191 int i, n;
192 48774 const int8_t *const qscale_table = s->c.cur_pic.qscale_table;
193
194 48774 memcpy(zigzag_last_index, s->c.block_last_index, sizeof(int) * 6);
195
196
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 341418 for (n = 0; n < 6; n++) {
197 int16_t *ac_val, *ac_val1;
198
199 585288 score -= get_block_rate(s, block[n], s->c.block_last_index[n],
200 292644 s->c.intra_scantable.permutated);
201
202 292644 ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16;
203 292644 ac_val1 = ac_val;
204
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 292644 if (dir[n]) {
205 80145 const int xy = s->c.mb_x + s->c.mb_y * s->c.mb_stride - s->c.mb_stride;
206 /* top prediction */
207 80145 ac_val -= s->c.block_wrap[n] * 16;
208
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 80145 if (s->c.first_slice_line || s->c.qscale == qscale_table[xy] || n == 2 || n == 3) {
209 /* same qscale */
210
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 641160 for (i = 1; i < 8; i++) {
211 561015 const int level = block[n][s->c.idsp.idct_permutation[i]];
212 561015 block[n][s->c.idsp.idct_permutation[i]] = level - ac_val[i + 8];
213 561015 ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]];
214 561015 ac_val1[i + 8] = level;
215 }
216 } else {
217 /* different qscale, we must rescale */
218 ✗ for (i = 1; i < 8; i++) {
219 ✗ const int level = block[n][s->c.idsp.idct_permutation[i]];
220 ✗ block[n][s->c.idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->c.qscale);
221 ✗ ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]];
222 ✗ ac_val1[i + 8] = level;
223 }
224 }
225 80145 st[n] = s->c.permutated_intra_h_scantable;
226 } else {
227 212499 const int xy = s->c.mb_x - 1 + s->c.mb_y * s->c.mb_stride;
228 /* left prediction */
229 212499 ac_val -= 16;
230
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 212499 if (s->c.mb_x == 0 || s->c.qscale == qscale_table[xy] || n == 1 || n == 3) {
231 /* same qscale */
232
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 1699992 for (i = 1; i < 8; i++) {
233 1487493 const int level = block[n][s->c.idsp.idct_permutation[i << 3]];
234 1487493 block[n][s->c.idsp.idct_permutation[i << 3]] = level - ac_val[i];
235 1487493 ac_val1[i] = level;
236 1487493 ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]];
237 }
238 } else {
239 /* different qscale, we must rescale */
240 ✗ for (i = 1; i < 8; i++) {
241 ✗ const int level = block[n][s->c.idsp.idct_permutation[i << 3]];
242 ✗ block[n][s->c.idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->c.qscale);
243 ✗ ac_val1[i] = level;
244 ✗ ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]];
245 }
246 }
247 212499 st[n] = s->c.permutated_intra_v_scantable;
248 }
249
250
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 12538840 for (i = 63; i > 0; i--) // FIXME optimize
251
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 12470313 if (block[n][st[n][i]])
252 224117 break;
253 292644 s->c.block_last_index[n] = i;
254
255 292644 score += get_block_rate(s, block[n], s->c.block_last_index[n], st[n]);
256 }
257
258
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 48774 if (score < 0) {
259 7332 return 1;
260 } else {
261 41442 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
262 41442 return 0;
263 }
264 }
265
266 /**
267 * modify mb_type & qscale so that encoding is actually possible in MPEG-4
268 */
269 400 void ff_clean_mpeg4_qscales(MPVEncContext *const s)
270 {
271 400 ff_clean_h263_qscales(s);
272
273
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 400 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
274 203 int8_t *const qscale_table = s->c.cur_pic.qscale_table;
275 203 int odd = 0;
276 /* ok, come on, this isn't funny anymore, there's more code for
277 * handling this MPEG-4 mess than for the actual adaptive quantization */
278
279
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 65498 for (int i = 0; i < s->c.mb_num; i++) {
280 65295 int mb_xy = s->c.mb_index2xy[i];
281 65295 odd += qscale_table[mb_xy] & 1;
282 }
283
284
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 203 if (2 * odd > s->c.mb_num)
285 112 odd = 1;
286 else
287 91 odd = 0;
288
289
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 65498 for (int i = 0; i < s->c.mb_num; i++) {
290 65295 int mb_xy = s->c.mb_index2xy[i];
291
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 65295 if ((qscale_table[mb_xy] & 1) != odd)
292 12015 qscale_table[mb_xy]++;
293
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 65295 if (qscale_table[mb_xy] > 31)
294 ✗ qscale_table[mb_xy] = 31;
295 }
296
297
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 65295 for (int i = 1; i < s->c.mb_num; i++) {
298 65092 int mb_xy = s->c.mb_index2xy[i];
299
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 65092 if (qscale_table[mb_xy] != qscale_table[s->c.mb_index2xy[i - 1]] &&
300
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 14465 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
301 14465 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
302 }
303 }
304 }
305 400 }
306
307 /**
308 * Encode the dc value.
309 * @param n block index (0-3 are luma, 4-5 are chroma)
310 */
311 1291776 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
312 {
313 /* DC will overflow if level is outside the [-255,255] range. */
314 1291776 level += 256;
315
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 1291776 if (n < 4) {
316 /* luminance */
317 861184 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
318 } else {
319 /* chrominance */
320 430592 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
321 }
322 1291776 }
323
324 /**
325 * Encode the AC coefficients of an 8x8 block.
326 */
327 4836617 static inline void mpeg4_encode_ac_coeffs(const int16_t block[64],
328 const int last_index, int i,
329 const uint8_t *const scan_table,
330 PutBitContext *const ac_pb,
331 const uint32_t *const bits_tab,
332 const uint8_t *const len_tab)
333 {
334 4836617 int last_non_zero = i - 1;
335
336 /* AC coefs */
337
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 136097086 for (; i < last_index; i++) {
338 131260469 int level = block[scan_table[i]];
339
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 131260469 if (level) {
340 42506746 int run = i - last_non_zero - 1;
341 42506746 level += 64;
342
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 42506746 if ((level & (~127)) == 0) {
343 42488792 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
344 42488792 put_bits(ac_pb, len_tab[index], bits_tab[index]);
345 } else { // ESC3
346 17954 put_bits(ac_pb,
347 7 + 2 + 1 + 6 + 1 + 12 + 1,
348 17954 (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
349 17954 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
350 }
351 42506746 last_non_zero = i;
352 }
353 }
354 /* if (i <= last_index) */ {
355 4836617 int level = block[scan_table[i]];
356 4836617 int run = i - last_non_zero - 1;
357 4836617 level += 64;
358
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 4836617 if ((level & (~127)) == 0) {
359 4836216 const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
360 4836216 put_bits(ac_pb, len_tab[index], bits_tab[index]);
361 } else { // ESC3
362 401 put_bits(ac_pb,
363 7 + 2 + 1 + 6 + 1 + 12 + 1,
364 401 (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
365 401 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
366 }
367 }
368 4836617 }
369
370 1518363 static void mpeg4_encode_blocks_inter(MPVEncContext *const s,
371 const int16_t block[6][64],
372 PutBitContext *ac_pb)
373 {
374 /* encode each block */
375
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 10628541 for (int n = 0; n < 6; ++n) {
376 9110178 const int last_index = s->c.block_last_index[n];
377
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 9110178 if (last_index < 0)
378 5274315 continue;
379
380 3835863 mpeg4_encode_ac_coeffs(block[n], last_index, 0,
381 3835863 s->c.intra_scantable.permutated, ac_pb,
382 uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
383 }
384 1518363 }
385
386 215296 static void mpeg4_encode_blocks_intra(MPVEncContext *const s,
387 const int16_t block[6][64],
388 const int intra_dc[6],
389 const uint8_t * const *scan_table,
390 PutBitContext *dc_pb,
391 PutBitContext *ac_pb)
392 {
393 /* encode each block */
394
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 1507072 for (int n = 0; n < 6; ++n) {
395 1291776 mpeg4_encode_dc(dc_pb, intra_dc[n], n);
396
397 1291776 const int last_index = s->c.block_last_index[n];
398
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 1291776 if (last_index <= 0)
399 291022 continue;
400
401 1000754 mpeg4_encode_ac_coeffs(block[n], last_index, 1,
402 1000754 scan_table[n], ac_pb,
403 uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
404 }
405 215296 }
406
407 709928 static inline int get_b_cbp(MPVEncContext *const s, int16_t block[6][64],
408 int motion_x, int motion_y, int mb_type)
409 {
410 709928 int cbp = 0, i;
411
412
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 709928 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
413 ✗ int score = 0;
414 ✗ const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
415
416 ✗ for (i = 0; i < 6; i++) {
417 ✗ if (s->coded_score[i] < 0) {
418 ✗ score += s->coded_score[i];
419 ✗ cbp |= 1 << (5 - i);
420 }
421 }
422
423 ✗ if (cbp) {
424 ✗ int zero_score = -6;
425 ✗ if ((motion_x | motion_y | s->dquant | mb_type) == 0)
426 ✗ zero_score -= 4; // 2 * MV + mb_type + cbp bit
427
428 ✗ zero_score *= lambda;
429 ✗ if (zero_score <= score)
430 ✗ cbp = 0;
431 }
432
433 ✗ for (i = 0; i < 6; i++) {
434 ✗ if (s->c.block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
435 ✗ s->c.block_last_index[i] = -1;
436 ✗ s->c.bdsp.clear_block(s->c.block[i]);
437 }
438 }
439 } else {
440
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 4969496 for (i = 0; i < 6; i++) {
441
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 4259568 if (s->c.block_last_index[i] >= 0)
442 1423197 cbp |= 1 << (5 - i);
443 }
444 }
445 709928 return cbp;
446 }
447
448 // FIXME this is duplicated to h263.c
449 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
450
451 1799573 static void mpeg4_encode_mb(MPVEncContext *const s, int16_t block[][64],
452 int motion_x, int motion_y)
453 {
454 int cbpc, cbpy, pred_x, pred_y;
455
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 1799573 PutBitContext *const pb2 = s->c.data_partitioning ? &s->pb2 : &s->pb;
456
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 1799573 PutBitContext *const tex_pb = s->c.data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
457
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 1799573 PutBitContext *const dc_pb = s->c.data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
458
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 1799573 const int interleaved_stats = (s->c.avctx->flags & AV_CODEC_FLAG_PASS1) && !s->c.data_partitioning ? 1 : 0;
459
460
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 1799573 if (!s->c.mb_intra) {
461 int i, cbp;
462
463
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 1584277 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
464 /* convert from mv_dir to type */
465 static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
466 710018 int mb_type = mb_type_table[s->c.mv_dir];
467
468
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 710018 if (s->c.mb_x == 0) {
469
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 101802 for (i = 0; i < 2; i++)
470 67868 s->c.last_mv[i][0][0] =
471 67868 s->c.last_mv[i][0][1] =
472 67868 s->c.last_mv[i][1][0] =
473 67868 s->c.last_mv[i][1][1] = 0;
474 }
475
476 av_assert2(s->dquant >= -2 && s->dquant <= 2);
477 av_assert2((s->dquant & 1) == 0);
478 av_assert2(mb_type >= 0);
479
480 /* nothing to do if this MB was skipped in the next P-frame */
481
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 710018 if (s->c.next_pic.mbskip_table[s->c.mb_y * s->c.mb_stride + s->c.mb_x]) { // FIXME avoid DCT & ...
482 90 s->c.mv[0][0][0] =
483 90 s->c.mv[0][0][1] =
484 90 s->c.mv[1][0][0] =
485 90 s->c.mv[1][0][1] = 0;
486 90 s->c.mv_dir = MV_DIR_FORWARD; // doesn't matter
487 90 s->c.qscale -= s->dquant;
488 // s->c.mb_skipped = 1;
489
490 65914 return;
491 }
492
493 709928 cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
494
495
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 709928 if ((cbp | motion_x | motion_y | mb_type) == 0) {
496 /* direct MB with MV={0,0} */
497 av_assert2(s->dquant == 0);
498
499 43224 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
500
501
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 43224 if (interleaved_stats) {
502 ✗ s->misc_bits++;
503 ✗ s->last_bits++;
504 }
505 43224 return;
506 }
507
508 666704 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
509 666704 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
510 666704 put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
511
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 666704 if (cbp)
512 438341 put_bits(&s->pb, 6, cbp);
513
514
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 666704 if (cbp && mb_type) {
515
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 309579 if (s->dquant)
516 41637 put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
517 else
518 267942 put_bits(&s->pb, 1, 0);
519 } else
520 357125 s->c.qscale -= s->dquant;
521
522
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 666704 if (!s->c.progressive_sequence) {
523 ✗ if (cbp)
524 ✗ put_bits(&s->pb, 1, s->c.interlaced_dct);
525 ✗ if (mb_type) // not direct mode
526 ✗ put_bits(&s->pb, 1, s->c.mv_type == MV_TYPE_FIELD);
527 }
528
529
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 666704 if (interleaved_stats)
530 ✗ s->misc_bits += get_bits_diff(s);
531
532
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 666704 if (!mb_type) {
533 av_assert2(s->c.mv_dir & MV_DIRECT);
534 151361 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
535 } else {
536 av_assert2(mb_type > 0 && mb_type < 4);
537
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 515343 if (s->c.mv_type != MV_TYPE_FIELD) {
538
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 515343 if (s->c.mv_dir & MV_DIR_FORWARD) {
539 349971 ff_h263_encode_motion_vector(s,
540 349971 s->c.mv[0][0][0] - s->c.last_mv[0][0][0],
541 349971 s->c.mv[0][0][1] - s->c.last_mv[0][0][1],
542 s->f_code);
543 349971 s->c.last_mv[0][0][0] =
544 349971 s->c.last_mv[0][1][0] = s->c.mv[0][0][0];
545 349971 s->c.last_mv[0][0][1] =
546 349971 s->c.last_mv[0][1][1] = s->c.mv[0][0][1];
547 }
548
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 515343 if (s->c.mv_dir & MV_DIR_BACKWARD) {
549 352997 ff_h263_encode_motion_vector(s,
550 352997 s->c.mv[1][0][0] - s->c.last_mv[1][0][0],
551 352997 s->c.mv[1][0][1] - s->c.last_mv[1][0][1],
552 s->b_code);
553 352997 s->c.last_mv[1][0][0] =
554 352997 s->c.last_mv[1][1][0] = s->c.mv[1][0][0];
555 352997 s->c.last_mv[1][0][1] =
556 352997 s->c.last_mv[1][1][1] = s->c.mv[1][0][1];
557 }
558 } else {
559 ✗ if (s->c.mv_dir & MV_DIR_FORWARD) {
560 ✗ put_bits(&s->pb, 1, s->c.field_select[0][0]);
561 ✗ put_bits(&s->pb, 1, s->c.field_select[0][1]);
562 }
563 ✗ if (s->c.mv_dir & MV_DIR_BACKWARD) {
564 ✗ put_bits(&s->pb, 1, s->c.field_select[1][0]);
565 ✗ put_bits(&s->pb, 1, s->c.field_select[1][1]);
566 }
567 ✗ if (s->c.mv_dir & MV_DIR_FORWARD) {
568 ✗ for (i = 0; i < 2; i++) {
569 ✗ ff_h263_encode_motion_vector(s,
570 ✗ s->c.mv[0][i][0] - s->c.last_mv[0][i][0],
571 ✗ s->c.mv[0][i][1] - s->c.last_mv[0][i][1] / 2,
572 s->f_code);
573 ✗ s->c.last_mv[0][i][0] = s->c.mv[0][i][0];
574 ✗ s->c.last_mv[0][i][1] = s->c.mv[0][i][1] * 2;
575 }
576 }
577 ✗ if (s->c.mv_dir & MV_DIR_BACKWARD) {
578 ✗ for (i = 0; i < 2; i++) {
579 ✗ ff_h263_encode_motion_vector(s,
580 ✗ s->c.mv[1][i][0] - s->c.last_mv[1][i][0],
581 ✗ s->c.mv[1][i][1] - s->c.last_mv[1][i][1] / 2,
582 s->b_code);
583 ✗ s->c.last_mv[1][i][0] = s->c.mv[1][i][0];
584 ✗ s->c.last_mv[1][i][1] = s->c.mv[1][i][1] * 2;
585 }
586 }
587 }
588 }
589
590
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 666704 if (interleaved_stats)
591 ✗ s->mv_bits += get_bits_diff(s);
592
593 666704 mpeg4_encode_blocks_inter(s, block, &s->pb);
594
595
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 666704 if (interleaved_stats)
596 ✗ s->p_tex_bits += get_bits_diff(s);
597 } else { /* s->c.pict_type == AV_PICTURE_TYPE_B */
598 874259 cbp = get_p_cbp(s, block, motion_x, motion_y);
599
600
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 874259 if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
601
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 56129 s->c.mv_type == MV_TYPE_16X16) {
602 22811 const MPVMainEncContext *const m = slice_to_mainenc(s);
603 /* Check if the B-frames can skip it too, as we must skip it
604 * if we skip here why didn't they just compress
605 * the skip-mb bits instead of reusing them ?! */
606
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 22811 if (m->max_b_frames > 0) {
607 int x, y, offset;
608 const uint8_t *p_pic;
609
610 720 x = s->c.mb_x * 16;
611 720 y = s->c.mb_y * 16;
612
613 720 offset = x + y * s->c.linesize;
614 720 p_pic = s->new_pic->data[0] + offset;
615
616 720 s->c.mb_skipped = 1;
617
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 862 for (int i = 0; i < m->max_b_frames; i++) {
618 const uint8_t *b_pic;
619 int diff;
620 791 const MPVPicture *pic = m->reordered_input_picture[i + 1];
621
622
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 791 if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
623 break;
624
625 353 b_pic = pic->f->data[0] + offset;
626
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 353 if (!pic->shared)
627 353 b_pic += INPLACE_OFFSET;
628
629
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 353 if (x + 16 > s->c.width || y + 16 > s->c.height) {
630 int x1, y1;
631 ✗ int xe = FFMIN(16, s->c.width - x);
632 ✗ int ye = FFMIN(16, s->c.height - y);
633 ✗ diff = 0;
634 ✗ for (y1 = 0; y1 < ye; y1++) {
635 ✗ for (x1 = 0; x1 < xe; x1++) {
636 ✗ diff += FFABS(p_pic[x1 + y1 * s->c.linesize] - b_pic[x1 + y1 * s->c.linesize]);
637 }
638 }
639 ✗ diff = diff * 256 / (xe * ye);
640 } else {
641 353 diff = s->sad_cmp[0](NULL, p_pic, b_pic, s->c.linesize, 16);
642 }
643
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 353 if (diff > s->c.qscale * 70) { // FIXME check that 70 is optimal
644 211 s->c.mb_skipped = 0;
645 211 break;
646 }
647 }
648 } else
649 22091 s->c.mb_skipped = 1;
650
651
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 22811 if (s->c.mb_skipped == 1) {
652 /* skip macroblock */
653 22600 put_bits(&s->pb, 1, 1);
654
655
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 22600 if (interleaved_stats) {
656 ✗ s->misc_bits++;
657 ✗ s->last_bits++;
658 }
659
660 22600 return;
661 }
662 }
663
664 851659 put_bits(&s->pb, 1, 0); /* mb coded */
665 851659 cbpc = cbp & 3;
666 851659 cbpy = cbp >> 2;
667 851659 cbpy ^= 0xf;
668
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 851659 if (s->c.mv_type == MV_TYPE_16X16) {
669
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 631610 if (s->dquant)
670 63254 cbpc += 8;
671 631610 put_bits(&s->pb,
672 631610 ff_h263_inter_MCBPC_bits[cbpc],
673 631610 ff_h263_inter_MCBPC_code[cbpc]);
674
675 631610 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
676
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 631610 if (s->dquant)
677 63254 put_bits(pb2, 2, dquant_code[s->dquant + 2]);
678
679
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 631610 if (!s->c.progressive_sequence) {
680 ✗ if (cbp)
681 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
682 ✗ put_bits(pb2, 1, 0);
683 }
684
685
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 631610 if (interleaved_stats)
686 ✗ s->misc_bits += get_bits_diff(s);
687
688 /* motion vectors: 16x16 mode */
689 631610 ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y);
690
691 631610 ff_h263_encode_motion_vector(s,
692 motion_x - pred_x,
693 motion_y - pred_y,
694 s->f_code);
695
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 220049 } else if (s->c.mv_type == MV_TYPE_FIELD) {
696 ✗ if (s->dquant)
697 ✗ cbpc += 8;
698 ✗ put_bits(&s->pb,
699 ✗ ff_h263_inter_MCBPC_bits[cbpc],
700 ✗ ff_h263_inter_MCBPC_code[cbpc]);
701
702 ✗ put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
703 ✗ if (s->dquant)
704 ✗ put_bits(pb2, 2, dquant_code[s->dquant + 2]);
705
706 av_assert2(!s->c.progressive_sequence);
707 ✗ if (cbp)
708 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
709 ✗ put_bits(pb2, 1, 1);
710
711 ✗ if (interleaved_stats)
712 ✗ s->misc_bits += get_bits_diff(s);
713
714 /* motion vectors: 16x8 interlaced mode */
715 ✗ ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y);
716 ✗ pred_y /= 2;
717
718 ✗ put_bits(&s->pb, 1, s->c.field_select[0][0]);
719 ✗ put_bits(&s->pb, 1, s->c.field_select[0][1]);
720
721 ✗ ff_h263_encode_motion_vector(s,
722 ✗ s->c.mv[0][0][0] - pred_x,
723 ✗ s->c.mv[0][0][1] - pred_y,
724 s->f_code);
725 ✗ ff_h263_encode_motion_vector(s,
726 ✗ s->c.mv[0][1][0] - pred_x,
727 ✗ s->c.mv[0][1][1] - pred_y,
728 s->f_code);
729 } else {
730 av_assert2(s->c.mv_type == MV_TYPE_8X8);
731 220049 put_bits(&s->pb,
732 220049 ff_h263_inter_MCBPC_bits[cbpc + 16],
733 220049 ff_h263_inter_MCBPC_code[cbpc + 16]);
734 220049 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
735
736
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 220049 if (!s->c.progressive_sequence && cbp)
737 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
738
739
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 220049 if (interleaved_stats)
740 ✗ s->misc_bits += get_bits_diff(s);
741
742
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 1100245 for (i = 0; i < 4; i++) {
743 /* motion vectors: 8x8 mode*/
744 880196 ff_h263_pred_motion(&s->c, i, 0, &pred_x, &pred_y);
745
746 880196 ff_h263_encode_motion_vector(s,
747 880196 s->c.cur_pic.motion_val[0][s->c.block_index[i]][0] - pred_x,
748 880196 s->c.cur_pic.motion_val[0][s->c.block_index[i]][1] - pred_y,
749 s->f_code);
750 }
751 }
752
753
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✓ Branch 1 taken 851659 times.
 851659 if (interleaved_stats)
754 ✗ s->mv_bits += get_bits_diff(s);
755
756 851659 mpeg4_encode_blocks_inter(s, block, tex_pb);
757
758
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 851659 if (interleaved_stats)
759 ✗ s->p_tex_bits += get_bits_diff(s);
760 }
761 } else {
762 int cbp;
763 int dc_diff[6]; // dc values with the dc prediction subtracted
764 int dir[6]; // prediction direction
765 int zigzag_last_index[6];
766 const uint8_t *scan_table[6];
767 int i;
768
769
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 1507072 for (int i = 0; i < 6; i++) {
770 1291776 int pred = mpeg4_pred_dc(&s->c, i, &dir[i]);
771
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 1291776 int scale = i < 4 ? s->c.y_dc_scale : s->c.c_dc_scale;
772
773 1291776 pred = FASTDIV((pred + (scale >> 1)), scale);
774 1291776 dc_diff[i] = block[i][0] - pred;
775 1291776 s->c.dc_val[s->c.block_index[i]] = av_clip_uintp2(block[i][0] * scale, 11);
776 }
777
778
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 215296 if (s->c.avctx->flags & AV_CODEC_FLAG_AC_PRED) {
779 48774 s->c.ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
780 } else {
781
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 1165654 for (i = 0; i < 6; i++)
782 999132 scan_table[i] = s->c.intra_scantable.permutated;
783 }
784
785 /* compute cbp */
786 215296 cbp = 0;
787
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 1507072 for (i = 0; i < 6; i++)
788
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 1291776 if (s->c.block_last_index[i] >= 1)
789 1000754 cbp |= 1 << (5 - i);
790
791 215296 cbpc = cbp & 3;
792
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 215296 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
793
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 113910 if (s->dquant)
794 26626 cbpc += 4;
795 113910 put_bits(&s->pb,
796 113910 ff_h263_intra_MCBPC_bits[cbpc],
797 113910 ff_h263_intra_MCBPC_code[cbpc]);
798 } else {
799
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 101386 if (s->dquant)
800 9460 cbpc += 8;
801 101386 put_bits(&s->pb, 1, 0); /* mb coded */
802 101386 put_bits(&s->pb,
803 101386 ff_h263_inter_MCBPC_bits[cbpc + 4],
804 101386 ff_h263_inter_MCBPC_code[cbpc + 4]);
805 }
806 215296 put_bits(pb2, 1, s->c.ac_pred);
807 215296 cbpy = cbp >> 2;
808 215296 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
809
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 215296 if (s->dquant)
810 36086 put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
811
812
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 215296 if (!s->c.progressive_sequence)
813 ✗ put_bits(dc_pb, 1, s->c.interlaced_dct);
814
815
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 215296 if (interleaved_stats)
816 ✗ s->misc_bits += get_bits_diff(s);
817
818 215296 mpeg4_encode_blocks_intra(s, block, dc_diff, scan_table, dc_pb, tex_pb);
819
820
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 215296 if (interleaved_stats)
821 ✗ s->i_tex_bits += get_bits_diff(s);
822 215296 s->i_count++;
823
824 /* restore ac coeffs & last_index stuff
825 * if we messed them up with the prediction */
826
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 215296 if (s->c.ac_pred)
827 7332 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
828 }
829 }
830
831 /**
832 * add MPEG-4 stuffing bits (01...1)
833 */
834 6706 void ff_mpeg4_stuffing(PutBitContext *pbc)
835 {
836 6706 int length = 8 - (put_bits_count(pbc) & 7);
837
838 6706 put_bits(pbc, length, (1 << (length - 1)) - 1);
839 6706 }
840
841 /* must be called before writing the header */
842 2665 void ff_set_mpeg4_time(MPVEncContext *const s)
843 {
844
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✓ Branch 1 taken 2078 times.
 2665 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
845 587 ff_mpeg4_init_direct_mv(&s->c);
846 } else {
847 2078 s->c.last_time_base = s->c.time_base;
848
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✓ Branch 1 taken 63 times.
 2078 s->c.time_base = FFUDIV(s->c.time, s->c.avctx->time_base.den);
849 }
850 2665 }
851
852 274 static void mpeg4_encode_gop_header(MPVMainEncContext *const m)
853 {
854 274 MPVEncContext *const s = &m->s;
855 int64_t hours, minutes, seconds;
856 int64_t time;
857
858 274 put_bits32(&s->pb, GOP_STARTCODE);
859
860 274 time = s->c.cur_pic.ptr->f->pts;
861
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 274 if (m->reordered_input_picture[1])
862 76 time = FFMIN(time, m->reordered_input_picture[1]->f->pts);
863 274 time = time * s->c.avctx->time_base.num;
864
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 274 s->c.last_time_base = FFUDIV(time, s->c.avctx->time_base.den);
865
866
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 274 seconds = FFUDIV(time, s->c.avctx->time_base.den);
867
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 274 minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
868
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 274 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
869
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 274 hours = FFUMOD(hours , 24);
870
871 274 put_bits(&s->pb, 5, hours);
872 274 put_bits(&s->pb, 6, minutes);
873 274 put_bits(&s->pb, 1, 1);
874 274 put_bits(&s->pb, 6, seconds);
875
876 274 put_bits(&s->pb, 1, !!(s->c.avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
877 274 put_bits(&s->pb, 1, 0); // broken link == NO
878
879 274 ff_mpeg4_stuffing(&s->pb);
880 274 }
881
882 222 static void mpeg4_encode_visual_object_header(MPVMainEncContext *const m)
883 {
884 222 MPVEncContext *const s = &m->s;
885 int profile_and_level_indication;
886 int vo_ver_id;
887
888
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 222 if (s->c.avctx->profile != AV_PROFILE_UNKNOWN) {
889 ✗ profile_and_level_indication = s->c.avctx->profile << 4;
890
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 222 } else if (m->max_b_frames || s->c.quarter_sample) {
891 101 profile_and_level_indication = 0xF0; // adv simple
892 } else {
893 121 profile_and_level_indication = 0x00; // simple
894 }
895
896
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 222 if (s->c.avctx->level != AV_LEVEL_UNKNOWN)
897 ✗ profile_and_level_indication |= s->c.avctx->level;
898 else
899 222 profile_and_level_indication |= 1; // level 1
900
901
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 222 if (profile_and_level_indication >> 4 == 0xF)
902 101 vo_ver_id = 5;
903 else
904 121 vo_ver_id = 1;
905
906 // FIXME levels
907
908 222 put_bits32(&s->pb, VOS_STARTCODE);
909
910 222 put_bits(&s->pb, 8, profile_and_level_indication);
911
912 222 put_bits32(&s->pb, VISUAL_OBJ_STARTCODE);
913
914 222 put_bits(&s->pb, 1, 1);
915 222 put_bits(&s->pb, 4, vo_ver_id);
916 222 put_bits(&s->pb, 3, 1); // priority
917
918 222 put_bits(&s->pb, 4, 1); // visual obj type== video obj
919
920 222 put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
921
922 222 ff_mpeg4_stuffing(&s->pb);
923 222 }
924
925 222 static void mpeg4_encode_vol_header(Mpeg4EncContext *const m4,
926 int vo_number,
927 int vol_number)
928 {
929 222 MPVEncContext *const s = &m4->m.s;
930 int vo_ver_id, vo_type, aspect_ratio_info;
931
932
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 222 if (m4->m.max_b_frames || s->c.quarter_sample) {
933 101 vo_ver_id = 5;
934 101 vo_type = ADV_SIMPLE_VO_TYPE;
935 } else {
936 121 vo_ver_id = 1;
937 121 vo_type = SIMPLE_VO_TYPE;
938 }
939
940 222 put_bits32(&s->pb, 0x100 + vo_number); /* video obj */
941 222 put_bits32(&s->pb, 0x120 + vol_number); /* video obj layer */
942
943 222 put_bits(&s->pb, 1, 0); /* random access vol */
944 222 put_bits(&s->pb, 8, vo_type); /* video obj type indication */
945 222 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
946 222 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
947 222 put_bits(&s->pb, 3, 1); /* is obj layer priority */
948
949 222 aspect_ratio_info = ff_h263_aspect_to_info(s->c.avctx->sample_aspect_ratio);
950
951 222 put_bits(&s->pb, 4, aspect_ratio_info); /* aspect ratio info */
952
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 222 if (aspect_ratio_info == FF_ASPECT_EXTENDED) {
953 ✗ av_reduce(&s->c.avctx->sample_aspect_ratio.num, &s->c.avctx->sample_aspect_ratio.den,
954 ✗ s->c.avctx->sample_aspect_ratio.num, s->c.avctx->sample_aspect_ratio.den, 255);
955 ✗ put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.num);
956 ✗ put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.den);
957 }
958
959 222 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
960 222 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
961 222 put_bits(&s->pb, 1, s->c.low_delay);
962 222 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
963
964 222 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
965 222 put_bits(&s->pb, 1, 1); /* marker bit */
966
967 222 put_bits(&s->pb, 16, s->c.avctx->time_base.den);
968
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 222 if (m4->time_increment_bits < 1)
969 ✗ m4->time_increment_bits = 1;
970 222 put_bits(&s->pb, 1, 1); /* marker bit */
971 222 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
972 222 put_bits(&s->pb, 1, 1); /* marker bit */
973 222 put_bits(&s->pb, 13, s->c.width); /* vol width */
974 222 put_bits(&s->pb, 1, 1); /* marker bit */
975 222 put_bits(&s->pb, 13, s->c.height); /* vol height */
976 222 put_bits(&s->pb, 1, 1); /* marker bit */
977 222 put_bits(&s->pb, 1, s->c.progressive_sequence ? 0 : 1);
978 222 put_bits(&s->pb, 1, 1); /* obmc disable */
979
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 222 if (vo_ver_id == 1)
980 121 put_bits(&s->pb, 1, 0); /* sprite enable */
981 else
982 101 put_bits(&s->pb, 2, 0); /* sprite enable */
983
984 222 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
985 222 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
986
987
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 222 if (s->mpeg_quant) {
988 20 ff_write_quant_matrix(&s->pb, s->c.avctx->intra_matrix);
989 20 ff_write_quant_matrix(&s->pb, s->c.avctx->inter_matrix);
990 }
991
992
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 222 if (vo_ver_id != 1)
993 101 put_bits(&s->pb, 1, s->c.quarter_sample);
994 222 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
995 222 put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
996 222 put_bits(&s->pb, 1, s->c.data_partitioning ? 1 : 0);
997
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 222 if (s->c.data_partitioning)
998 60 put_bits(&s->pb, 1, 0); /* no rvlc */
999
1000
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 222 if (vo_ver_id != 1) {
1001 101 put_bits(&s->pb, 1, 0); /* newpred */
1002 101 put_bits(&s->pb, 1, 0); /* reduced res vop */
1003 }
1004 222 put_bits(&s->pb, 1, 0); /* scalability */
1005
1006 222 ff_mpeg4_stuffing(&s->pb);
1007
1008 /* user data */
1009
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 222 if (!(s->c.avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
1010 ✗ put_bits32(&s->pb, USER_DATA_STARTCODE);
1011 ✗ ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1012 }
1013 222 }
1014
1015 /* write MPEG-4 VOP header */
1016 2665 static int mpeg4_encode_picture_header(MPVMainEncContext *const m)
1017 {
1018 2665 Mpeg4EncContext *const m4 = mainctx_to_mpeg4(m);
1019 2665 MPVEncContext *const s = &m->s;
1020 uint64_t time_incr;
1021 int64_t time_div, time_mod;
1022
1023 2665 put_bits_assume_flushed(&s->pb);
1024
1025
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
1026
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 274 if (!(s->c.avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
1027
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 201 if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1028 201 mpeg4_encode_visual_object_header(m);
1029
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 201 if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || s->c.picture_number == 0) // HACK, the reference sw is buggy
1030 201 mpeg4_encode_vol_header(m4, 0, 0);
1031 }
1032 274 mpeg4_encode_gop_header(m);
1033 }
1034
1035
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 2665 s->c.partitioned_frame = s->c.data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B;
1036
1037 2665 put_bits32(&s->pb, VOP_STARTCODE); /* vop header */
1038 2665 put_bits(&s->pb, 2, s->c.pict_type - 1); /* pict type: I = 0 , P = 1 */
1039
1040
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 2665 time_div = FFUDIV(s->c.time, s->c.avctx->time_base.den);
1041
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 2665 time_mod = FFUMOD(s->c.time, s->c.avctx->time_base.den);
1042 2665 time_incr = time_div - s->c.last_time_base;
1043
1044 // This limits the frame duration to max 1 day
1045
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 2665 if (time_incr > 3600*24) {
1046 ✗ av_log(s->c.avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
1047 ✗ return AVERROR(EINVAL);
1048 }
1049
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 2746 while (time_incr--)
1050 81 put_bits(&s->pb, 1, 1);
1051
1052 2665 put_bits(&s->pb, 1, 0);
1053
1054 2665 put_bits(&s->pb, 1, 1); /* marker */
1055 2665 put_bits(&s->pb, m4->time_increment_bits, time_mod); /* time increment */
1056 2665 put_bits(&s->pb, 1, 1); /* marker */
1057 2665 put_bits(&s->pb, 1, 1); /* vop coded */
1058
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_P) {
1059 1804 put_bits(&s->pb, 1, s->c.no_rounding); /* rounding type */
1060 }
1061 2665 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1062
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 2665 if (!s->c.progressive_sequence) {
1063 ✗ put_bits(&s->pb, 1, !!(s->c.cur_pic.ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST));
1064 ✗ put_bits(&s->pb, 1, s->c.alternate_scan);
1065 }
1066 // FIXME sprite stuff
1067
1068 2665 put_bits(&s->pb, 5, s->c.qscale);
1069
1070
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 2665 if (s->c.pict_type != AV_PICTURE_TYPE_I)
1071 2391 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1072
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_B)
1073 587 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1074
1075 2665 return 0;
1076 }
1077
1078 63 static av_cold void init_uni_dc_tab(void)
1079 {
1080 int level, uni_code, uni_len;
1081
1082
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 32319 for (level = -256; level < 256; level++) {
1083 int size, v, l;
1084 /* find number of bits */
1085 32256 size = 0;
1086 32256 v = abs(level);
1087
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 258741 while (v) {
1088 226485 v >>= 1;
1089 226485 size++;
1090 }
1091
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 32256 if (level < 0)
1093 16128 l = (-level) ^ ((1 << size) - 1);
1094 else
1095 16128 l = level;
1096
1097 /* luminance */
1098 32256 uni_code = ff_mpeg4_DCtab_lum[size][0];
1099 32256 uni_len = ff_mpeg4_DCtab_lum[size][1];
1100
1101
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 32256 if (size > 0) {
1102 32193 uni_code <<= size;
1103 32193 uni_code |= l;
1104 32193 uni_len += size;
1105
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 32193 if (size > 8) {
1106 63 uni_code <<= 1;
1107 63 uni_code |= 1;
1108 63 uni_len++;
1109 }
1110 }
1111 32256 uni_DCtab_lum_bits[level + 256] = uni_code;
1112 32256 uni_DCtab_lum_len[level + 256] = uni_len;
1113
1114 /* chrominance */
1115 32256 uni_code = ff_mpeg4_DCtab_chrom[size][0];
1116 32256 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1117
1118
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 32256 if (size > 0) {
1119 32193 uni_code <<= size;
1120 32193 uni_code |= l;
1121 32193 uni_len += size;
1122
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 32193 if (size > 8) {
1123 63 uni_code <<= 1;
1124 63 uni_code |= 1;
1125 63 uni_len++;
1126 }
1127 }
1128 32256 uni_DCtab_chrom_bits[level + 256] = uni_code;
1129 32256 uni_DCtab_chrom_len[level + 256] = uni_len;
1130 }
1131 63 }
1132
1133 126 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1134 uint8_t *len_tab)
1135 {
1136 // Type 3 escape method. The escape code is the same for both VLCs
1137 // (0x3, seven bits), so it is hardcoded.
1138 126 memset(len_tab, 30, 2 * 2 * 64 * 64);
1139 126 len_tab += 64;
1140 126 bits_tab += 64;
1141
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 8190 for (int run = 0; run < 64; ++run) {
1142 8064 for (int level = 1;; ++level) {
1143 // Escape code type 3 not last run (6 bits) marker marker
1144 516096 unsigned code = (3 << 23) | (3 << 21) | (0 << 20) | (run << 14) | (1 << 13) | 1;
1145 // first the negative levels
1146 516096 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] = code | (-level & 0xfff) << 1;
1147 516096 bits_tab[UNI_MPEG4_ENC_INDEX(1, run, -level)] =
1148 516096 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] | (1 << 20) /* last */;
1149
1150
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 516096 if (level == 64) // positive levels have a range of 1..63
1151 8064 break;
1152 508032 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] = code | level << 1;
1153 508032 bits_tab[UNI_MPEG4_ENC_INDEX(1, run, level)] =
1154 508032 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] | (1 << 20) /* last */;
1155 }
1156 // Is this needed at all?
1157 8064 len_tab[UNI_MPEG4_ENC_INDEX(0, run, 0)] =
1158 8064 len_tab[UNI_MPEG4_ENC_INDEX(1, run, 0)] = 0;
1159 }
1160
1161 126 uint8_t max_run[2][32] = { 0 };
1162
1163 #define VLC_NUM_CODES 102 // excluding the escape
1164 av_assert2(rl->n == VLC_NUM_CODES);
1165
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 12978 for (int i = VLC_NUM_CODES - 1, max_level, cur_run = 0; i >= 0; --i) {
1166 12852 int run = rl->table_run[i], level = rl->table_level[i];
1167 12852 int last = i >= rl->last;
1168 12852 unsigned code = rl->table_vlc[i][0] << 1;
1169 12852 int len = rl->table_vlc[i][1] + 1;
1170
1171 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code;
1172 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len;
1173 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1;
1174 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len;
1175
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 12852 if (!max_run[last][level])
1177 3150 max_run[last][level] = run + 1;
1178 av_assert2(run + 1 <= max_run[last][level]);
1179
1180 12852 int run3 = run + max_run[last][level];
1181 12852 int len3 = len + 7 + 2;
1182
1183
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 12852 if (run3 < 64 && len3 < len_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)]) {
1184 7812 unsigned code3 = code | (0x3 << 2 | 0x2) << len;
1185 7812 bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)] = code3;
1186 7812 len_tab [UNI_MPEG4_ENC_INDEX(last, run3, level)] = len3;
1187 7812 bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, -level)] = code3 | 1;
1188 7812 len_tab [UNI_MPEG4_ENC_INDEX(last, run3, -level)] = len3;
1189 }
1190 // table_run and table_level are ordered so that all the entries
1191 // with the same last and run are consecutive and level is ascending
1192 // among these entries. By traversing downwards we therefore automatically
1193 // encounter max_level of a given run first, needed for escape method 1.
1194
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 12852 if (run != cur_run) {
1195 6552 max_level = level;
1196 6552 cur_run = run;
1197 } else
1198 av_assert2(max_level > level);
1199
1200 12852 code |= 0x3 << (len + 1);
1201 12852 len += 7 + 1;
1202 12852 level += max_level;
1203 av_assert2(len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] >= len);
1204 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code;
1205 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len;
1206 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1;
1207 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len;
1208 }
1209 126 }
1210
1211 63 static av_cold void mpeg4_encode_init_static(void)
1212 {
1213 63 init_uni_dc_tab();
1214
1215 63 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1216 63 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1217
1218
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 504 for (int f_code = MAX_FCODE; f_code > 0; f_code--) {
1219
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 512505 for (int mv = -(16 << f_code); mv < (16 << f_code); mv++)
1220 512064 fcode_tab[mv + MAX_MV] = f_code;
1221 }
1222 63 }
1223
1224 63 static av_cold int encode_init(AVCodecContext *avctx)
1225 {
1226 static AVOnce init_static_once = AV_ONCE_INIT;
1227 63 Mpeg4EncContext *const m4 = avctx->priv_data;
1228 63 MPVMainEncContext *const m = &m4->m;
1229 63 MPVEncContext *const s = &m->s;
1230 int ret;
1231
1232
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 63 if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1233 ✗ av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1234 ✗ return AVERROR(EINVAL);
1235 }
1236
1237 63 m->encode_picture_header = mpeg4_encode_picture_header;
1238 63 s->encode_mb = mpeg4_encode_mb;
1239
1240 63 m->fcode_tab = fcode_tab + MAX_MV;
1241
1242 63 s->min_qcoeff = -2048;
1243 63 s->max_qcoeff = 2047;
1244 63 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1245 63 s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
1246 63 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1247 63 s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
1248 63 s->luma_dc_vlc_length = uni_DCtab_lum_len;
1249 63 s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1250 63 s->c.y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
1251 63 s->c.c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
1252
1253 63 ff_qpeldsp_init(&s->c.qdsp);
1254
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 63 if ((ret = ff_mpv_encode_init(avctx)) < 0)
1255 ✗ return ret;
1256
1257 63 ff_thread_once(&init_static_once, mpeg4_encode_init_static);
1258
1259
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 63 if (avctx->time_base.den > (1 << 16) - 1) {
1260 ✗ av_log(avctx, AV_LOG_ERROR,
1261 "timebase %d/%d not supported by MPEG 4 standard, "
1262 "the maximum admitted value for the timebase denominator "
1263 "is %d\n", avctx->time_base.num, avctx->time_base.den,
1264 (1 << 16) - 1);
1265 ✗ return AVERROR(EINVAL);
1266 }
1267
1268 63 m4->time_increment_bits = av_log2(avctx->time_base.den - 1) + 1;
1269
1270
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 63 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
1271 21 avctx->extradata = av_malloc(1024);
1272
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 21 if (!avctx->extradata)
1273 ✗ return AVERROR(ENOMEM);
1274 21 init_put_bits(&s->pb, avctx->extradata, 1024);
1275
1276 21 mpeg4_encode_visual_object_header(m);
1277 21 mpeg4_encode_vol_header(m4, 0, 0);
1278
1279 // ff_mpeg4_stuffing(&s->pb); ?
1280 21 flush_put_bits(&s->pb);
1281 21 avctx->extradata_size = put_bytes_output(&s->pb);
1282 }
1283 63 return 0;
1284 }
1285
1286 1760 void ff_mpeg4_init_partitions(MPVEncContext *const s)
1287 {
1288 1760 uint8_t *start = put_bits_ptr(&s->pb);
1289 1760 uint8_t *end = s->pb.buf_end;
1290 1760 int size = end - start;
1291 1760 int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1292 1760 int tex_size = (size - 2 * pb_size) & (~3);
1293
1294 1760 set_put_bits_buffer_size(&s->pb, pb_size);
1295 1760 init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1296 1760 init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1297 1760 }
1298
1299 1760 void ff_mpeg4_merge_partitions(MPVEncContext *const s)
1300 {
1301 1760 const int pb2_len = put_bits_count(&s->pb2);
1302 1760 const int tex_pb_len = put_bits_count(&s->tex_pb);
1303 1760 const int bits = put_bits_count(&s->pb);
1304
1305
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 1760 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
1306 512 put_bits(&s->pb, 19, DC_MARKER);
1307 512 s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1308 512 s->i_tex_bits += tex_pb_len;
1309 } else {
1310 1248 put_bits(&s->pb, 17, MOTION_MARKER);
1311 1248 s->misc_bits += 17 + pb2_len;
1312 1248 s->mv_bits += bits - s->last_bits;
1313 1248 s->p_tex_bits += tex_pb_len;
1314 }
1315
1316 1760 flush_put_bits(&s->pb2);
1317 1760 flush_put_bits(&s->tex_pb);
1318
1319 1760 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1320 1760 ff_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1321 1760 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1322 1760 s->last_bits = put_bits_count(&s->pb);
1323 1760 }
1324
1325 3323 void ff_mpeg4_encode_video_packet_header(MPVEncContext *const s)
1326 {
1327 3323 int mb_num_bits = av_log2(s->c.mb_num - 1) + 1;
1328
1329 3323 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s->c.pict_type, s->f_code, s->b_code), 0);
1330 3323 put_bits(&s->pb, 1, 1);
1331
1332 3323 put_bits(&s->pb, mb_num_bits, s->c.mb_x + s->c.mb_y * s->c.mb_width);
1333 3323 put_bits(&s->pb, 5 /* quant_precision */, s->c.qscale);
1334 3323 put_bits(&s->pb, 1, 0); /* no HEC */
1335 3323 }
1336
1337 #define OFFSET(x) offsetof(MPVEncContext, x)
1338 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1339 static const AVOption options[] = {
1340 { "data_partitioning", "Use data partitioning.", OFFSET(c.data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1341 { "alternate_scan", "Enable alternate scantable.", OFFSET(c.alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1342 { "mpeg_quant", "Use MPEG quantizers instead of H.263",
1343 OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE },
1344 FF_MPV_COMMON_BFRAME_OPTS
1345 FF_MPV_COMMON_OPTS
1346 FF_MPV_COMMON_MOTION_EST_OPTS
1347 FF_MPEG4_PROFILE_OPTS
1348 { NULL },
1349 };
1350
1351 static const AVClass mpeg4enc_class = {
1352 .class_name = "MPEG4 encoder",
1353 .item_name = av_default_item_name,
1354 .option = options,
1355 .version = LIBAVUTIL_VERSION_INT,
1356 };
1357
1358 const FFCodec ff_mpeg4_encoder = {
1359 .p.name = "mpeg4",
1360 CODEC_LONG_NAME("MPEG-4 part 2"),
1361 .p.type = AVMEDIA_TYPE_VIDEO,
1362 .p.id = AV_CODEC_ID_MPEG4,
1363 .priv_data_size = sizeof(Mpeg4EncContext),
1364 .init = encode_init,
1365 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1366 .close = ff_mpv_encode_end,
1367 CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
1368 .color_ranges = AVCOL_RANGE_MPEG,
1369 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
1370 AV_CODEC_CAP_SLICE_THREADS |
1371 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1372 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1373 .p.priv_class = &mpeg4enc_class,
1374 };
1375