FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg4videoenc.c
Date: 2025-07-08 13:42:56
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 "mathops.h"
33 #include "mpeg4video.h"
34 #include "mpeg4videodata.h"
35 #include "mpeg4videodefs.h"
36 #include "mpeg4videoenc.h"
37 #include "mpegvideoenc.h"
38 #include "profiles.h"
39 #include "put_bits.h"
40 #include "version.h"
41
42 /**
43 * Minimal fcode that a motion vector component would need.
44 */
45 static uint8_t fcode_tab[MAX_MV*2+1];
46
47 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
48 * differences in MPEG-4. Unified in the sense that the specification specifies
49 * this encoding in several steps. */
50 static uint8_t uni_DCtab_lum_len[512];
51 static uint8_t uni_DCtab_chrom_len[512];
52 static uint16_t uni_DCtab_lum_bits[512];
53 static uint16_t uni_DCtab_chrom_bits[512];
54
55 /* Unified encoding tables for run length encoding of coefficients.
56 * Unified in the sense that the specification specifies the encoding in several steps. */
57 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
58 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
59 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
60 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
61
62 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
63 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
64 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
65
66 /* MPEG-4
67 * inter
68 * max level: 24/6
69 * max run: 53/63
70 *
71 * intra
72 * max level: 53/16
73 * max run: 29/41
74 */
75
76 typedef struct Mpeg4EncContext {
77 MPVMainEncContext m;
78 /// number of bits to represent the fractional part of time
79 int time_increment_bits;
80 } Mpeg4EncContext;
81
82 2665 static inline Mpeg4EncContext *mainctx_to_mpeg4(MPVMainEncContext *m)
83 {
84 2665 return (Mpeg4EncContext*)m;
85 }
86
87 /**
88 * Return the number of bits that encoding the 8x8 block in block would need.
89 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
90 */
91 585288 static inline int get_block_rate(MPVEncContext *const s, int16_t block[64],
92 int block_last_index, const uint8_t scantable[64])
93 {
94 585288 int last = 0;
95 int j;
96 585288 int rate = 0;
97
98
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 12547868 for (j = 1; j <= block_last_index; j++) {
99 11962580 const int index = scantable[j];
100 11962580 int level = block[index];
101
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 11962580 if (level) {
102 5655201 level += 64;
103
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 5655201 if ((level & (~127)) == 0) {
104
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 5653593 if (j < block_last_index)
105 5215921 rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
106 else
107 437672 rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
108 } else
109 1608 rate += s->ac_esc_length;
110
111 5655201 last = j;
112 }
113 }
114
115 585288 return rate;
116 }
117
118 /**
119 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
120 * This function also restores s->c.block_last_index.
121 * @param[in,out] block MB coefficients, these will be restored
122 * @param[in] dir ac prediction direction for each 8x8 block
123 * @param[out] st scantable for each 8x8 block
124 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
125 */
126 48774 static inline void restore_ac_coeffs(MPVEncContext *const s, int16_t block[6][64],
127 const int dir[6], const uint8_t *st[6],
128 const int zigzag_last_index[6])
129 {
130 int i, n;
131 48774 memcpy(s->c.block_last_index, zigzag_last_index, sizeof(int) * 6);
132
133
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 341418 for (n = 0; n < 6; n++) {
134 292644 int16_t *ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16;
135
136 292644 st[n] = s->c.intra_scantable.permutated;
137
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 292644 if (dir[n]) {
138 /* top prediction */
139
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 641160 for (i = 1; i < 8; i++)
140 561015 block[n][s->c.idsp.idct_permutation[i]] = ac_val[i + 8];
141 } else {
142 /* left prediction */
143
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 1699992 for (i = 1; i < 8; i++)
144 1487493 block[n][s->c.idsp.idct_permutation[i << 3]] = ac_val[i];
145 }
146 }
147 48774 }
148
149 /**
150 * Predict the dc.
151 * @param n block index (0-3 are luma, 4-5 are chroma)
152 * @param dir_ptr pointer to an integer where the prediction direction will be stored
153 */
154 1291776 static int mpeg4_pred_dc(MpegEncContext *s, int n, int *dir_ptr)
155 {
156 1291776 const int16_t *const dc_val = s->dc_val + s->block_index[n];
157 1291776 const int wrap = s->block_wrap[n];
158
159 /* B C
160 * A X
161 */
162 1291776 const int a = dc_val[-1];
163 1291776 const int b = dc_val[-1 - wrap];
164 1291776 const int c = dc_val[-wrap];
165 int pred;
166
167 // There is no need for out-of-slice handling here, as all values are set
168 // appropriately when a new slice is opened.
169
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 1291776 if (abs(a - b) < abs(b - c)) {
170 452403 pred = c;
171 452403 *dir_ptr = 1; /* top */
172 } else {
173 839373 pred = a;
174 839373 *dir_ptr = 0; /* left */
175 }
176 1291776 return pred;
177 }
178
179 /**
180 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
181 * This function will also update s->c.block_last_index and s->c.ac_val.
182 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
183 * @param[in] dir ac prediction direction for each 8x8 block
184 * @param[out] st scantable for each 8x8 block
185 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
186 */
187 48774 static inline int decide_ac_pred(MPVEncContext *const s, int16_t block[6][64],
188 const int dir[6], const uint8_t *st[6],
189 int zigzag_last_index[6])
190 {
191 48774 int score = 0;
192 int i, n;
193 48774 const int8_t *const qscale_table = s->c.cur_pic.qscale_table;
194
195 48774 memcpy(zigzag_last_index, s->c.block_last_index, sizeof(int) * 6);
196
197
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 341418 for (n = 0; n < 6; n++) {
198 int16_t *ac_val, *ac_val1;
199
200 585288 score -= get_block_rate(s, block[n], s->c.block_last_index[n],
201 292644 s->c.intra_scantable.permutated);
202
203 292644 ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16;
204 292644 ac_val1 = ac_val;
205
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 292644 if (dir[n]) {
206 80145 const int xy = s->c.mb_x + s->c.mb_y * s->c.mb_stride - s->c.mb_stride;
207 /* top prediction */
208 80145 ac_val -= s->c.block_wrap[n] * 16;
209
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 80145 if (s->c.first_slice_line || s->c.qscale == qscale_table[xy] || n == 2 || n == 3) {
210 /* same qscale */
211
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 641160 for (i = 1; i < 8; i++) {
212 561015 const int level = block[n][s->c.idsp.idct_permutation[i]];
213 561015 block[n][s->c.idsp.idct_permutation[i]] = level - ac_val[i + 8];
214 561015 ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]];
215 561015 ac_val1[i + 8] = level;
216 }
217 } else {
218 /* different qscale, we must rescale */
219 ✗ for (i = 1; i < 8; i++) {
220 ✗ const int level = block[n][s->c.idsp.idct_permutation[i]];
221 ✗ block[n][s->c.idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->c.qscale);
222 ✗ ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]];
223 ✗ ac_val1[i + 8] = level;
224 }
225 }
226 80145 st[n] = s->c.permutated_intra_h_scantable;
227 } else {
228 212499 const int xy = s->c.mb_x - 1 + s->c.mb_y * s->c.mb_stride;
229 /* left prediction */
230 212499 ac_val -= 16;
231
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 212499 if (s->c.mb_x == 0 || s->c.qscale == qscale_table[xy] || n == 1 || n == 3) {
232 /* same qscale */
233
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 1699992 for (i = 1; i < 8; i++) {
234 1487493 const int level = block[n][s->c.idsp.idct_permutation[i << 3]];
235 1487493 block[n][s->c.idsp.idct_permutation[i << 3]] = level - ac_val[i];
236 1487493 ac_val1[i] = level;
237 1487493 ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]];
238 }
239 } else {
240 /* different qscale, we must rescale */
241 ✗ for (i = 1; i < 8; i++) {
242 ✗ const int level = block[n][s->c.idsp.idct_permutation[i << 3]];
243 ✗ block[n][s->c.idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->c.qscale);
244 ✗ ac_val1[i] = level;
245 ✗ ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]];
246 }
247 }
248 212499 st[n] = s->c.permutated_intra_v_scantable;
249 }
250
251
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 12538840 for (i = 63; i > 0; i--) // FIXME optimize
252
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 12470313 if (block[n][st[n][i]])
253 224117 break;
254 292644 s->c.block_last_index[n] = i;
255
256 292644 score += get_block_rate(s, block[n], s->c.block_last_index[n], st[n]);
257 }
258
259
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 48774 if (score < 0) {
260 7332 return 1;
261 } else {
262 41442 restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
263 41442 return 0;
264 }
265 }
266
267 /**
268 * modify mb_type & qscale so that encoding is actually possible in MPEG-4
269 */
270 400 void ff_clean_mpeg4_qscales(MPVEncContext *const s)
271 {
272 400 ff_clean_h263_qscales(s);
273
274
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 400 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
275 203 int8_t *const qscale_table = s->c.cur_pic.qscale_table;
276 203 int odd = 0;
277 /* ok, come on, this isn't funny anymore, there's more code for
278 * handling this MPEG-4 mess than for the actual adaptive quantization */
279
280
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 65498 for (int i = 0; i < s->c.mb_num; i++) {
281 65295 int mb_xy = s->c.mb_index2xy[i];
282 65295 odd += qscale_table[mb_xy] & 1;
283 }
284
285
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 203 if (2 * odd > s->c.mb_num)
286 112 odd = 1;
287 else
288 91 odd = 0;
289
290
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 65498 for (int i = 0; i < s->c.mb_num; i++) {
291 65295 int mb_xy = s->c.mb_index2xy[i];
292
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 65295 if ((qscale_table[mb_xy] & 1) != odd)
293 12015 qscale_table[mb_xy]++;
294
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 65295 if (qscale_table[mb_xy] > 31)
295 ✗ qscale_table[mb_xy] = 31;
296 }
297
298
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 65295 for (int i = 1; i < s->c.mb_num; i++) {
299 65092 int mb_xy = s->c.mb_index2xy[i];
300
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 65092 if (qscale_table[mb_xy] != qscale_table[s->c.mb_index2xy[i - 1]] &&
301
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 14465 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
302 14465 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
303 }
304 }
305 }
306 400 }
307
308 /**
309 * Encode the dc value.
310 * @param n block index (0-3 are luma, 4-5 are chroma)
311 */
312 1291776 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
313 {
314 /* DC will overflow if level is outside the [-255,255] range. */
315 1291776 level += 256;
316
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 1291776 if (n < 4) {
317 /* luminance */
318 861184 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
319 } else {
320 /* chrominance */
321 430592 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
322 }
323 1291776 }
324
325 /**
326 * Encode the AC coefficients of an 8x8 block.
327 */
328 4836617 static inline void mpeg4_encode_ac_coeffs(const int16_t block[64],
329 const int last_index, int i,
330 const uint8_t *const scan_table,
331 PutBitContext *const ac_pb,
332 const uint32_t *const bits_tab,
333 const uint8_t *const len_tab)
334 {
335 4836617 int last_non_zero = i - 1;
336
337 /* AC coefs */
338
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 136097086 for (; i < last_index; i++) {
339 131260469 int level = block[scan_table[i]];
340
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 131260469 if (level) {
341 42506746 int run = i - last_non_zero - 1;
342 42506746 level += 64;
343
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 42506746 if ((level & (~127)) == 0) {
344 42488792 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
345 42488792 put_bits(ac_pb, len_tab[index], bits_tab[index]);
346 } else { // ESC3
347 17954 put_bits(ac_pb,
348 7 + 2 + 1 + 6 + 1 + 12 + 1,
349 17954 (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
350 17954 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
351 }
352 42506746 last_non_zero = i;
353 }
354 }
355 /* if (i <= last_index) */ {
356 4836617 int level = block[scan_table[i]];
357 4836617 int run = i - last_non_zero - 1;
358 4836617 level += 64;
359
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 4836617 if ((level & (~127)) == 0) {
360 4836216 const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
361 4836216 put_bits(ac_pb, len_tab[index], bits_tab[index]);
362 } else { // ESC3
363 401 put_bits(ac_pb,
364 7 + 2 + 1 + 6 + 1 + 12 + 1,
365 401 (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
366 401 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
367 }
368 }
369 4836617 }
370
371 1518363 static void mpeg4_encode_blocks_inter(MPVEncContext *const s,
372 const int16_t block[6][64],
373 PutBitContext *ac_pb)
374 {
375 /* encode each block */
376
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 10628541 for (int n = 0; n < 6; ++n) {
377 9110178 const int last_index = s->c.block_last_index[n];
378
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 9110178 if (last_index < 0)
379 5274315 continue;
380
381 3835863 mpeg4_encode_ac_coeffs(block[n], last_index, 0,
382 3835863 s->c.intra_scantable.permutated, ac_pb,
383 uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
384 }
385 1518363 }
386
387 215296 static void mpeg4_encode_blocks_intra(MPVEncContext *const s,
388 const int16_t block[6][64],
389 const int intra_dc[6],
390 const uint8_t * const *scan_table,
391 PutBitContext *dc_pb,
392 PutBitContext *ac_pb)
393 {
394 /* encode each block */
395
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 1507072 for (int n = 0; n < 6; ++n) {
396 1291776 mpeg4_encode_dc(dc_pb, intra_dc[n], n);
397
398 1291776 const int last_index = s->c.block_last_index[n];
399
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 1291776 if (last_index <= 0)
400 291022 continue;
401
402 1000754 mpeg4_encode_ac_coeffs(block[n], last_index, 1,
403 1000754 scan_table[n], ac_pb,
404 uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
405 }
406 215296 }
407
408 709928 static inline int get_b_cbp(MPVEncContext *const s, int16_t block[6][64],
409 int motion_x, int motion_y, int mb_type)
410 {
411 709928 int cbp = 0, i;
412
413
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 709928 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
414 ✗ int score = 0;
415 ✗ const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
416
417 ✗ for (i = 0; i < 6; i++) {
418 ✗ if (s->coded_score[i] < 0) {
419 ✗ score += s->coded_score[i];
420 ✗ cbp |= 1 << (5 - i);
421 }
422 }
423
424 ✗ if (cbp) {
425 ✗ int zero_score = -6;
426 ✗ if ((motion_x | motion_y | s->dquant | mb_type) == 0)
427 ✗ zero_score -= 4; // 2 * MV + mb_type + cbp bit
428
429 ✗ zero_score *= lambda;
430 ✗ if (zero_score <= score)
431 ✗ cbp = 0;
432 }
433
434 ✗ for (i = 0; i < 6; i++) {
435 ✗ if (s->c.block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
436 ✗ s->c.block_last_index[i] = -1;
437 ✗ s->c.bdsp.clear_block(s->block[i]);
438 }
439 }
440 } else {
441
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 4969496 for (i = 0; i < 6; i++) {
442
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 4259568 if (s->c.block_last_index[i] >= 0)
443 1423197 cbp |= 1 << (5 - i);
444 }
445 }
446 709928 return cbp;
447 }
448
449 // FIXME this is duplicated to h263.c
450 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
451
452 1799573 static void mpeg4_encode_mb(MPVEncContext *const s, int16_t block[][64],
453 int motion_x, int motion_y)
454 {
455 int cbpc, cbpy, pred_x, pred_y;
456
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 1799573 PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
457
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 1799573 PutBitContext *const tex_pb = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
458
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 1799573 PutBitContext *const dc_pb = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
459
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 1799573 const int interleaved_stats = (s->c.avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning;
460
461
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 1799573 if (!s->c.mb_intra) {
462 int i, cbp;
463
464
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 1584277 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
465 /* convert from mv_dir to type */
466 static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
467 710018 int mb_type = mb_type_table[s->c.mv_dir];
468
469
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 710018 if (s->c.mb_x == 0) {
470
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 101802 for (i = 0; i < 2; i++)
471 67868 s->c.last_mv[i][0][0] =
472 67868 s->c.last_mv[i][0][1] =
473 67868 s->c.last_mv[i][1][0] =
474 67868 s->c.last_mv[i][1][1] = 0;
475 }
476
477 av_assert2(s->dquant >= -2 && s->dquant <= 2);
478 av_assert2((s->dquant & 1) == 0);
479 av_assert2(mb_type >= 0);
480
481 /* nothing to do if this MB was skipped in the next P-frame */
482
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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 & ...
483 90 s->c.mv[0][0][0] =
484 90 s->c.mv[0][0][1] =
485 90 s->c.mv[1][0][0] =
486 90 s->c.mv[1][0][1] = 0;
487 90 s->c.mv_dir = MV_DIR_FORWARD; // doesn't matter
488 90 s->c.qscale -= s->dquant;
489 // s->c.mb_skipped = 1;
490
491 65914 return;
492 }
493
494 709928 cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
495
496
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 709928 if ((cbp | motion_x | motion_y | mb_type) == 0) {
497 /* direct MB with MV={0,0} */
498 av_assert2(s->dquant == 0);
499
500 43224 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
501
502
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 43224 if (interleaved_stats) {
503 ✗ s->misc_bits++;
504 ✗ s->last_bits++;
505 }
506 43224 return;
507 }
508
509 666704 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
510 666704 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
511 666704 put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
512
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 666704 if (cbp)
513 438341 put_bits(&s->pb, 6, cbp);
514
515
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 666704 if (cbp && mb_type) {
516
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 309579 if (s->dquant)
517 41637 put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
518 else
519 267942 put_bits(&s->pb, 1, 0);
520 } else
521 357125 s->c.qscale -= s->dquant;
522
523
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 666704 if (!s->c.progressive_sequence) {
524 ✗ if (cbp)
525 ✗ put_bits(&s->pb, 1, s->c.interlaced_dct);
526 ✗ if (mb_type) // not direct mode
527 ✗ put_bits(&s->pb, 1, s->c.mv_type == MV_TYPE_FIELD);
528 }
529
530
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 666704 if (interleaved_stats)
531 ✗ s->misc_bits += get_bits_diff(s);
532
533
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 666704 if (!mb_type) {
534 av_assert2(s->c.mv_dir & MV_DIRECT);
535 151361 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
536 } else {
537 av_assert2(mb_type > 0 && mb_type < 4);
538
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 515343 if (s->c.mv_type != MV_TYPE_FIELD) {
539
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 515343 if (s->c.mv_dir & MV_DIR_FORWARD) {
540 349971 ff_h263_encode_motion_vector(s,
541 349971 s->c.mv[0][0][0] - s->c.last_mv[0][0][0],
542 349971 s->c.mv[0][0][1] - s->c.last_mv[0][0][1],
543 s->f_code);
544 349971 s->c.last_mv[0][0][0] =
545 349971 s->c.last_mv[0][1][0] = s->c.mv[0][0][0];
546 349971 s->c.last_mv[0][0][1] =
547 349971 s->c.last_mv[0][1][1] = s->c.mv[0][0][1];
548 }
549
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 515343 if (s->c.mv_dir & MV_DIR_BACKWARD) {
550 352997 ff_h263_encode_motion_vector(s,
551 352997 s->c.mv[1][0][0] - s->c.last_mv[1][0][0],
552 352997 s->c.mv[1][0][1] - s->c.last_mv[1][0][1],
553 s->b_code);
554 352997 s->c.last_mv[1][0][0] =
555 352997 s->c.last_mv[1][1][0] = s->c.mv[1][0][0];
556 352997 s->c.last_mv[1][0][1] =
557 352997 s->c.last_mv[1][1][1] = s->c.mv[1][0][1];
558 }
559 } else {
560 ✗ if (s->c.mv_dir & MV_DIR_FORWARD) {
561 ✗ put_bits(&s->pb, 1, s->c.field_select[0][0]);
562 ✗ put_bits(&s->pb, 1, s->c.field_select[0][1]);
563 }
564 ✗ if (s->c.mv_dir & MV_DIR_BACKWARD) {
565 ✗ put_bits(&s->pb, 1, s->c.field_select[1][0]);
566 ✗ put_bits(&s->pb, 1, s->c.field_select[1][1]);
567 }
568 ✗ if (s->c.mv_dir & MV_DIR_FORWARD) {
569 ✗ for (i = 0; i < 2; i++) {
570 ✗ ff_h263_encode_motion_vector(s,
571 ✗ s->c.mv[0][i][0] - s->c.last_mv[0][i][0],
572 ✗ s->c.mv[0][i][1] - s->c.last_mv[0][i][1] / 2,
573 s->f_code);
574 ✗ s->c.last_mv[0][i][0] = s->c.mv[0][i][0];
575 ✗ s->c.last_mv[0][i][1] = s->c.mv[0][i][1] * 2;
576 }
577 }
578 ✗ if (s->c.mv_dir & MV_DIR_BACKWARD) {
579 ✗ for (i = 0; i < 2; i++) {
580 ✗ ff_h263_encode_motion_vector(s,
581 ✗ s->c.mv[1][i][0] - s->c.last_mv[1][i][0],
582 ✗ s->c.mv[1][i][1] - s->c.last_mv[1][i][1] / 2,
583 s->b_code);
584 ✗ s->c.last_mv[1][i][0] = s->c.mv[1][i][0];
585 ✗ s->c.last_mv[1][i][1] = s->c.mv[1][i][1] * 2;
586 }
587 }
588 }
589 }
590
591
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 666704 if (interleaved_stats)
592 ✗ s->mv_bits += get_bits_diff(s);
593
594 666704 mpeg4_encode_blocks_inter(s, block, &s->pb);
595
596
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 666704 if (interleaved_stats)
597 ✗ s->p_tex_bits += get_bits_diff(s);
598 } else { /* s->c.pict_type == AV_PICTURE_TYPE_B */
599 874259 cbp = get_p_cbp(s, block, motion_x, motion_y);
600
601
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 874259 if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
602
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 56129 s->c.mv_type == MV_TYPE_16X16) {
603 22811 const MPVMainEncContext *const m = slice_to_mainenc(s);
604 /* Check if the B-frames can skip it too, as we must skip it
605 * if we skip here why didn't they just compress
606 * the skip-mb bits instead of reusing them ?! */
607
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 22811 if (m->max_b_frames > 0) {
608 int x, y, offset;
609 const uint8_t *p_pic;
610
611 720 x = s->c.mb_x * 16;
612 720 y = s->c.mb_y * 16;
613
614 720 offset = x + y * s->c.linesize;
615 720 p_pic = s->new_pic->data[0] + offset;
616
617 720 s->c.mb_skipped = 1;
618
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 862 for (int i = 0; i < m->max_b_frames; i++) {
619 const uint8_t *b_pic;
620 int diff;
621 791 const MPVPicture *pic = m->reordered_input_picture[i + 1];
622
623
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 791 if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
624 break;
625
626 353 b_pic = pic->f->data[0] + offset;
627
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 353 if (!pic->shared)
628 353 b_pic += INPLACE_OFFSET;
629
630
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 353 if (x + 16 > s->c.width || y + 16 > s->c.height) {
631 int x1, y1;
632 ✗ int xe = FFMIN(16, s->c.width - x);
633 ✗ int ye = FFMIN(16, s->c.height - y);
634 ✗ diff = 0;
635 ✗ for (y1 = 0; y1 < ye; y1++) {
636 ✗ for (x1 = 0; x1 < xe; x1++) {
637 ✗ diff += FFABS(p_pic[x1 + y1 * s->c.linesize] - b_pic[x1 + y1 * s->c.linesize]);
638 }
639 }
640 ✗ diff = diff * 256 / (xe * ye);
641 } else {
642 353 diff = s->sad_cmp[0](NULL, p_pic, b_pic, s->c.linesize, 16);
643 }
644
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 353 if (diff > s->c.qscale * 70) { // FIXME check that 70 is optimal
645 211 s->c.mb_skipped = 0;
646 211 break;
647 }
648 }
649 } else
650 22091 s->c.mb_skipped = 1;
651
652
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 22811 if (s->c.mb_skipped == 1) {
653 /* skip macroblock */
654 22600 put_bits(&s->pb, 1, 1);
655
656
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 22600 if (interleaved_stats) {
657 ✗ s->misc_bits++;
658 ✗ s->last_bits++;
659 }
660
661 22600 return;
662 }
663 }
664
665 851659 put_bits(&s->pb, 1, 0); /* mb coded */
666 851659 cbpc = cbp & 3;
667 851659 cbpy = cbp >> 2;
668 851659 cbpy ^= 0xf;
669
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 851659 if (s->c.mv_type == MV_TYPE_16X16) {
670
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 631610 if (s->dquant)
671 63254 cbpc += 8;
672 631610 put_bits(&s->pb,
673 631610 ff_h263_inter_MCBPC_bits[cbpc],
674 631610 ff_h263_inter_MCBPC_code[cbpc]);
675
676 631610 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
677
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 631610 if (s->dquant)
678 63254 put_bits(pb2, 2, dquant_code[s->dquant + 2]);
679
680
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 631610 if (!s->c.progressive_sequence) {
681 ✗ if (cbp)
682 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
683 ✗ put_bits(pb2, 1, 0);
684 }
685
686
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 631610 if (interleaved_stats)
687 ✗ s->misc_bits += get_bits_diff(s);
688
689 /* motion vectors: 16x16 mode */
690 631610 ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y);
691
692 631610 ff_h263_encode_motion_vector(s,
693 motion_x - pred_x,
694 motion_y - pred_y,
695 s->f_code);
696
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 220049 } else if (s->c.mv_type == MV_TYPE_FIELD) {
697 ✗ if (s->dquant)
698 ✗ cbpc += 8;
699 ✗ put_bits(&s->pb,
700 ✗ ff_h263_inter_MCBPC_bits[cbpc],
701 ✗ ff_h263_inter_MCBPC_code[cbpc]);
702
703 ✗ put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
704 ✗ if (s->dquant)
705 ✗ put_bits(pb2, 2, dquant_code[s->dquant + 2]);
706
707 av_assert2(!s->c.progressive_sequence);
708 ✗ if (cbp)
709 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
710 ✗ put_bits(pb2, 1, 1);
711
712 ✗ if (interleaved_stats)
713 ✗ s->misc_bits += get_bits_diff(s);
714
715 /* motion vectors: 16x8 interlaced mode */
716 ✗ ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y);
717 ✗ pred_y /= 2;
718
719 ✗ put_bits(&s->pb, 1, s->c.field_select[0][0]);
720 ✗ put_bits(&s->pb, 1, s->c.field_select[0][1]);
721
722 ✗ ff_h263_encode_motion_vector(s,
723 ✗ s->c.mv[0][0][0] - pred_x,
724 ✗ s->c.mv[0][0][1] - pred_y,
725 s->f_code);
726 ✗ ff_h263_encode_motion_vector(s,
727 ✗ s->c.mv[0][1][0] - pred_x,
728 ✗ s->c.mv[0][1][1] - pred_y,
729 s->f_code);
730 } else {
731 av_assert2(s->c.mv_type == MV_TYPE_8X8);
732 220049 put_bits(&s->pb,
733 220049 ff_h263_inter_MCBPC_bits[cbpc + 16],
734 220049 ff_h263_inter_MCBPC_code[cbpc + 16]);
735 220049 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
736
737
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 220049 if (!s->c.progressive_sequence && cbp)
738 ✗ put_bits(pb2, 1, s->c.interlaced_dct);
739
740
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 220049 if (interleaved_stats)
741 ✗ s->misc_bits += get_bits_diff(s);
742
743
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 1100245 for (i = 0; i < 4; i++) {
744 /* motion vectors: 8x8 mode*/
745 880196 ff_h263_pred_motion(&s->c, i, 0, &pred_x, &pred_y);
746
747 880196 ff_h263_encode_motion_vector(s,
748 880196 s->c.cur_pic.motion_val[0][s->c.block_index[i]][0] - pred_x,
749 880196 s->c.cur_pic.motion_val[0][s->c.block_index[i]][1] - pred_y,
750 s->f_code);
751 }
752 }
753
754
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✓ Branch 1 taken 851659 times.
 851659 if (interleaved_stats)
755 ✗ s->mv_bits += get_bits_diff(s);
756
757 851659 mpeg4_encode_blocks_inter(s, block, tex_pb);
758
759
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 851659 if (interleaved_stats)
760 ✗ s->p_tex_bits += get_bits_diff(s);
761 }
762 } else {
763 int cbp;
764 int dc_diff[6]; // dc values with the dc prediction subtracted
765 int dir[6]; // prediction direction
766 int zigzag_last_index[6];
767 const uint8_t *scan_table[6];
768 int i;
769
770
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 1507072 for (int i = 0; i < 6; i++) {
771 1291776 int pred = mpeg4_pred_dc(&s->c, i, &dir[i]);
772
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 1291776 int scale = i < 4 ? s->c.y_dc_scale : s->c.c_dc_scale;
773
774 1291776 pred = FASTDIV((pred + (scale >> 1)), scale);
775 1291776 dc_diff[i] = block[i][0] - pred;
776 1291776 s->c.dc_val[s->c.block_index[i]] = av_clip_uintp2(block[i][0] * scale, 11);
777 }
778
779
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 215296 if (s->c.avctx->flags & AV_CODEC_FLAG_AC_PRED) {
780 48774 s->c.ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
781 } else {
782
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 1165654 for (i = 0; i < 6; i++)
783 999132 scan_table[i] = s->c.intra_scantable.permutated;
784 }
785
786 /* compute cbp */
787 215296 cbp = 0;
788
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 1507072 for (i = 0; i < 6; i++)
789
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 1291776 if (s->c.block_last_index[i] >= 1)
790 1000754 cbp |= 1 << (5 - i);
791
792 215296 cbpc = cbp & 3;
793
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 215296 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
794
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 113910 if (s->dquant)
795 26626 cbpc += 4;
796 113910 put_bits(&s->pb,
797 113910 ff_h263_intra_MCBPC_bits[cbpc],
798 113910 ff_h263_intra_MCBPC_code[cbpc]);
799 } else {
800
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 101386 if (s->dquant)
801 9460 cbpc += 8;
802 101386 put_bits(&s->pb, 1, 0); /* mb coded */
803 101386 put_bits(&s->pb,
804 101386 ff_h263_inter_MCBPC_bits[cbpc + 4],
805 101386 ff_h263_inter_MCBPC_code[cbpc + 4]);
806 }
807 215296 put_bits(pb2, 1, s->c.ac_pred);
808 215296 cbpy = cbp >> 2;
809 215296 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
810
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 215296 if (s->dquant)
811 36086 put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
812
813
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 215296 if (!s->c.progressive_sequence)
814 ✗ put_bits(dc_pb, 1, s->c.interlaced_dct);
815
816
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 215296 if (interleaved_stats)
817 ✗ s->misc_bits += get_bits_diff(s);
818
819 215296 mpeg4_encode_blocks_intra(s, block, dc_diff, scan_table, dc_pb, tex_pb);
820
821
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 215296 if (interleaved_stats)
822 ✗ s->i_tex_bits += get_bits_diff(s);
823 215296 s->i_count++;
824
825 /* restore ac coeffs & last_index stuff
826 * if we messed them up with the prediction */
827
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 215296 if (s->c.ac_pred)
828 7332 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
829 }
830 }
831
832 /**
833 * add MPEG-4 stuffing bits (01...1)
834 */
835 6706 void ff_mpeg4_stuffing(PutBitContext *pbc)
836 {
837 6706 int length = 8 - (put_bits_count(pbc) & 7);
838
839 6706 put_bits(pbc, length, (1 << (length - 1)) - 1);
840 6706 }
841
842 /* must be called before writing the header */
843 2665 void ff_set_mpeg4_time(MPVEncContext *const s)
844 {
845
2/2
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✓ Branch 1 taken 2078 times.
 2665 if (s->c.pict_type == AV_PICTURE_TYPE_B) {
846 587 ff_mpeg4_init_direct_mv(&s->c);
847 } else {
848 2078 s->c.last_time_base = s->c.time_base;
849
2/2
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✓ Branch 1 taken 63 times.
 2078 s->c.time_base = FFUDIV(s->c.time, s->c.avctx->time_base.den);
850 }
851 2665 }
852
853 274 static void mpeg4_encode_gop_header(MPVMainEncContext *const m)
854 {
855 274 MPVEncContext *const s = &m->s;
856 int64_t hours, minutes, seconds;
857 int64_t time;
858
859 274 put_bits32(&s->pb, GOP_STARTCODE);
860
861 274 time = s->c.cur_pic.ptr->f->pts;
862
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 274 if (m->reordered_input_picture[1])
863 76 time = FFMIN(time, m->reordered_input_picture[1]->f->pts);
864 274 time = time * s->c.avctx->time_base.num;
865
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 274 s->c.last_time_base = FFUDIV(time, s->c.avctx->time_base.den);
866
867
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 274 seconds = FFUDIV(time, s->c.avctx->time_base.den);
868
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 274 minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
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 274 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
870
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 274 hours = FFUMOD(hours , 24);
871
872 274 put_bits(&s->pb, 5, hours);
873 274 put_bits(&s->pb, 6, minutes);
874 274 put_bits(&s->pb, 1, 1);
875 274 put_bits(&s->pb, 6, seconds);
876
877 274 put_bits(&s->pb, 1, !!(s->c.avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
878 274 put_bits(&s->pb, 1, 0); // broken link == NO
879
880 274 ff_mpeg4_stuffing(&s->pb);
881 274 }
882
883 222 static void mpeg4_encode_visual_object_header(MPVMainEncContext *const m)
884 {
885 222 MPVEncContext *const s = &m->s;
886 int profile_and_level_indication;
887 int vo_ver_id;
888
889
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 222 if (s->c.avctx->profile != AV_PROFILE_UNKNOWN) {
890 ✗ profile_and_level_indication = s->c.avctx->profile << 4;
891
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 222 } else if (m->max_b_frames || s->c.quarter_sample) {
892 101 profile_and_level_indication = 0xF0; // adv simple
893 } else {
894 121 profile_and_level_indication = 0x00; // simple
895 }
896
897
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 222 if (s->c.avctx->level != AV_LEVEL_UNKNOWN)
898 ✗ profile_and_level_indication |= s->c.avctx->level;
899 else
900 222 profile_and_level_indication |= 1; // level 1
901
902
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 222 if (profile_and_level_indication >> 4 == 0xF)
903 101 vo_ver_id = 5;
904 else
905 121 vo_ver_id = 1;
906
907 // FIXME levels
908
909 222 put_bits32(&s->pb, VOS_STARTCODE);
910
911 222 put_bits(&s->pb, 8, profile_and_level_indication);
912
913 222 put_bits32(&s->pb, VISUAL_OBJ_STARTCODE);
914
915 222 put_bits(&s->pb, 1, 1);
916 222 put_bits(&s->pb, 4, vo_ver_id);
917 222 put_bits(&s->pb, 3, 1); // priority
918
919 222 put_bits(&s->pb, 4, 1); // visual obj type== video obj
920
921 222 put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
922
923 222 ff_mpeg4_stuffing(&s->pb);
924 222 }
925
926 222 static void mpeg4_encode_vol_header(Mpeg4EncContext *const m4,
927 int vo_number,
928 int vol_number)
929 {
930 222 MPVEncContext *const s = &m4->m.s;
931 int vo_ver_id, vo_type, aspect_ratio_info;
932
933
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 222 if (m4->m.max_b_frames || s->c.quarter_sample) {
934 101 vo_ver_id = 5;
935 101 vo_type = ADV_SIMPLE_VO_TYPE;
936 } else {
937 121 vo_ver_id = 1;
938 121 vo_type = SIMPLE_VO_TYPE;
939 }
940
941 222 put_bits32(&s->pb, 0x100 + vo_number); /* video obj */
942 222 put_bits32(&s->pb, 0x120 + vol_number); /* video obj layer */
943
944 222 put_bits(&s->pb, 1, 0); /* random access vol */
945 222 put_bits(&s->pb, 8, vo_type); /* video obj type indication */
946 222 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
947 222 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
948 222 put_bits(&s->pb, 3, 1); /* is obj layer priority */
949
950 222 aspect_ratio_info = ff_h263_aspect_to_info(s->c.avctx->sample_aspect_ratio);
951
952 222 put_bits(&s->pb, 4, aspect_ratio_info); /* aspect ratio info */
953
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 222 if (aspect_ratio_info == FF_ASPECT_EXTENDED) {
954 ✗ av_reduce(&s->c.avctx->sample_aspect_ratio.num, &s->c.avctx->sample_aspect_ratio.den,
955 ✗ s->c.avctx->sample_aspect_ratio.num, s->c.avctx->sample_aspect_ratio.den, 255);
956 ✗ put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.num);
957 ✗ put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.den);
958 }
959
960 222 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
961 222 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
962 222 put_bits(&s->pb, 1, s->c.low_delay);
963 222 put_bits(&s->pb, 1, 0); /* vbv parameters= no */
964
965 222 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
966 222 put_bits(&s->pb, 1, 1); /* marker bit */
967
968 222 put_bits(&s->pb, 16, s->c.avctx->time_base.den);
969
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 222 if (m4->time_increment_bits < 1)
970 ✗ m4->time_increment_bits = 1;
971 222 put_bits(&s->pb, 1, 1); /* marker bit */
972 222 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
973 222 put_bits(&s->pb, 1, 1); /* marker bit */
974 222 put_bits(&s->pb, 13, s->c.width); /* vol width */
975 222 put_bits(&s->pb, 1, 1); /* marker bit */
976 222 put_bits(&s->pb, 13, s->c.height); /* vol height */
977 222 put_bits(&s->pb, 1, 1); /* marker bit */
978 222 put_bits(&s->pb, 1, s->c.progressive_sequence ? 0 : 1);
979 222 put_bits(&s->pb, 1, 1); /* obmc disable */
980
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 222 if (vo_ver_id == 1)
981 121 put_bits(&s->pb, 1, 0); /* sprite enable */
982 else
983 101 put_bits(&s->pb, 2, 0); /* sprite enable */
984
985 222 put_bits(&s->pb, 1, 0); /* not 8 bit == false */
986 222 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
987
988
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 222 if (s->mpeg_quant) {
989 20 ff_write_quant_matrix(&s->pb, s->c.avctx->intra_matrix);
990 20 ff_write_quant_matrix(&s->pb, s->c.avctx->inter_matrix);
991 }
992
993
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 222 if (vo_ver_id != 1)
994 101 put_bits(&s->pb, 1, s->c.quarter_sample);
995 222 put_bits(&s->pb, 1, 1); /* complexity estimation disable */
996 222 put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
997 222 put_bits(&s->pb, 1, s->data_partitioning);
998
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 222 if (s->data_partitioning)
999 60 put_bits(&s->pb, 1, 0); /* no rvlc */
1000
1001
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 222 if (vo_ver_id != 1) {
1002 101 put_bits(&s->pb, 1, 0); /* newpred */
1003 101 put_bits(&s->pb, 1, 0); /* reduced res vop */
1004 }
1005 222 put_bits(&s->pb, 1, 0); /* scalability */
1006
1007 222 ff_mpeg4_stuffing(&s->pb);
1008
1009 /* user data */
1010
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 222 if (!(s->c.avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
1011 ✗ put_bits32(&s->pb, USER_DATA_STARTCODE);
1012 ✗ ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1013 }
1014 222 }
1015
1016 /* write MPEG-4 VOP header */
1017 2665 static int mpeg4_encode_picture_header(MPVMainEncContext *const m)
1018 {
1019 2665 Mpeg4EncContext *const m4 = mainctx_to_mpeg4(m);
1020 2665 MPVEncContext *const s = &m->s;
1021 uint64_t time_incr;
1022 int64_t time_div, time_mod;
1023
1024 2665 put_bits_assume_flushed(&s->pb);
1025
1026
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
1027
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 274 if (!(s->c.avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
1028
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 201 if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1029 201 mpeg4_encode_visual_object_header(m);
1030
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 201 if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || s->picture_number == 0) // HACK, the reference sw is buggy
1031 201 mpeg4_encode_vol_header(m4, 0, 0);
1032 }
1033 274 mpeg4_encode_gop_header(m);
1034 }
1035
1036
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 2665 s->partitioned_frame = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B;
1037
1038 2665 put_bits32(&s->pb, VOP_STARTCODE); /* vop header */
1039 2665 put_bits(&s->pb, 2, s->c.pict_type - 1); /* pict type: I = 0 , P = 1 */
1040
1041
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 2665 time_div = FFUDIV(s->c.time, s->c.avctx->time_base.den);
1042
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 2665 time_mod = FFUMOD(s->c.time, s->c.avctx->time_base.den);
1043 2665 time_incr = time_div - s->c.last_time_base;
1044
1045 // This limits the frame duration to max 1 day
1046
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 2665 if (time_incr > 3600*24) {
1047 ✗ av_log(s->c.avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
1048 ✗ return AVERROR(EINVAL);
1049 }
1050
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 2746 while (time_incr--)
1051 81 put_bits(&s->pb, 1, 1);
1052
1053 2665 put_bits(&s->pb, 1, 0);
1054
1055 2665 put_bits(&s->pb, 1, 1); /* marker */
1056 2665 put_bits(&s->pb, m4->time_increment_bits, time_mod); /* time increment */
1057 2665 put_bits(&s->pb, 1, 1); /* marker */
1058 2665 put_bits(&s->pb, 1, 1); /* vop coded */
1059
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_P) {
1060 1804 put_bits(&s->pb, 1, s->c.no_rounding); /* rounding type */
1061 }
1062 2665 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1063
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 2665 if (!s->c.progressive_sequence) {
1064 ✗ put_bits(&s->pb, 1, !!(s->c.cur_pic.ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST));
1065 ✗ put_bits(&s->pb, 1, s->c.alternate_scan);
1066 }
1067 // FIXME sprite stuff
1068
1069 2665 put_bits(&s->pb, 5, s->c.qscale);
1070
1071
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 2665 if (s->c.pict_type != AV_PICTURE_TYPE_I)
1072 2391 put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1073
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 2665 if (s->c.pict_type == AV_PICTURE_TYPE_B)
1074 587 put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1075
1076 2665 return 0;
1077 }
1078
1079 63 static av_cold void init_uni_dc_tab(void)
1080 {
1081 int level, uni_code, uni_len;
1082
1083
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 32319 for (level = -256; level < 256; level++) {
1084 int size, v, l;
1085 /* find number of bits */
1086 32256 size = 0;
1087 32256 v = abs(level);
1088
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 258741 while (v) {
1089 226485 v >>= 1;
1090 226485 size++;
1091 }
1092
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 32256 if (level < 0)
1094 16128 l = (-level) ^ ((1 << size) - 1);
1095 else
1096 16128 l = level;
1097
1098 /* luminance */
1099 32256 uni_code = ff_mpeg4_DCtab_lum[size][0];
1100 32256 uni_len = ff_mpeg4_DCtab_lum[size][1];
1101
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 32256 if (size > 0) {
1103 32193 uni_code <<= size;
1104 32193 uni_code |= l;
1105 32193 uni_len += size;
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 32193 if (size > 8) {
1107 63 uni_code <<= 1;
1108 63 uni_code |= 1;
1109 63 uni_len++;
1110 }
1111 }
1112 32256 uni_DCtab_lum_bits[level + 256] = uni_code;
1113 32256 uni_DCtab_lum_len[level + 256] = uni_len;
1114
1115 /* chrominance */
1116 32256 uni_code = ff_mpeg4_DCtab_chrom[size][0];
1117 32256 uni_len = ff_mpeg4_DCtab_chrom[size][1];
1118
1119
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 32256 if (size > 0) {
1120 32193 uni_code <<= size;
1121 32193 uni_code |= l;
1122 32193 uni_len += size;
1123
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 32193 if (size > 8) {
1124 63 uni_code <<= 1;
1125 63 uni_code |= 1;
1126 63 uni_len++;
1127 }
1128 }
1129 32256 uni_DCtab_chrom_bits[level + 256] = uni_code;
1130 32256 uni_DCtab_chrom_len[level + 256] = uni_len;
1131 }
1132 63 }
1133
1134 126 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1135 uint8_t *len_tab)
1136 {
1137 // Type 3 escape method. The escape code is the same for both VLCs
1138 // (0x3, seven bits), so it is hardcoded.
1139 126 memset(len_tab, 30, 2 * 2 * 64 * 64);
1140 126 len_tab += 64;
1141 126 bits_tab += 64;
1142
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 8190 for (int run = 0; run < 64; ++run) {
1143 8064 for (int level = 1;; ++level) {
1144 // Escape code type 3 not last run (6 bits) marker marker
1145 516096 unsigned code = (3 << 23) | (3 << 21) | (0 << 20) | (run << 14) | (1 << 13) | 1;
1146 // first the negative levels
1147 516096 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] = code | (-level & 0xfff) << 1;
1148 516096 bits_tab[UNI_MPEG4_ENC_INDEX(1, run, -level)] =
1149 516096 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] | (1 << 20) /* last */;
1150
1151
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 516096 if (level == 64) // positive levels have a range of 1..63
1152 8064 break;
1153 508032 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] = code | level << 1;
1154 508032 bits_tab[UNI_MPEG4_ENC_INDEX(1, run, level)] =
1155 508032 bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] | (1 << 20) /* last */;
1156 }
1157 // Is this needed at all?
1158 8064 len_tab[UNI_MPEG4_ENC_INDEX(0, run, 0)] =
1159 8064 len_tab[UNI_MPEG4_ENC_INDEX(1, run, 0)] = 0;
1160 }
1161
1162 126 uint8_t max_run[2][32] = { 0 };
1163
1164 #define VLC_NUM_CODES 102 // excluding the escape
1165 av_assert2(rl->n == VLC_NUM_CODES);
1166
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 12978 for (int i = VLC_NUM_CODES - 1, max_level, cur_run = 0; i >= 0; --i) {
1167 12852 int run = rl->table_run[i], level = rl->table_level[i];
1168 12852 int last = i >= rl->last;
1169 12852 unsigned code = rl->table_vlc[i][0] << 1;
1170 12852 int len = rl->table_vlc[i][1] + 1;
1171
1172 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code;
1173 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len;
1174 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1;
1175 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len;
1176
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 12852 if (!max_run[last][level])
1178 3150 max_run[last][level] = run + 1;
1179 av_assert2(run + 1 <= max_run[last][level]);
1180
1181 12852 int run3 = run + max_run[last][level];
1182 12852 int len3 = len + 7 + 2;
1183
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 12852 if (run3 < 64 && len3 < len_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)]) {
1185 7812 unsigned code3 = code | (0x3 << 2 | 0x2) << len;
1186 7812 bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)] = code3;
1187 7812 len_tab [UNI_MPEG4_ENC_INDEX(last, run3, level)] = len3;
1188 7812 bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, -level)] = code3 | 1;
1189 7812 len_tab [UNI_MPEG4_ENC_INDEX(last, run3, -level)] = len3;
1190 }
1191 // table_run and table_level are ordered so that all the entries
1192 // with the same last and run are consecutive and level is ascending
1193 // among these entries. By traversing downwards we therefore automatically
1194 // encounter max_level of a given run first, needed for escape method 1.
1195
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 12852 if (run != cur_run) {
1196 6552 max_level = level;
1197 6552 cur_run = run;
1198 } else
1199 av_assert2(max_level > level);
1200
1201 12852 code |= 0x3 << (len + 1);
1202 12852 len += 7 + 1;
1203 12852 level += max_level;
1204 av_assert2(len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] >= len);
1205 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code;
1206 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len;
1207 12852 bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1;
1208 12852 len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len;
1209 }
1210 126 }
1211
1212 63 static av_cold void mpeg4_encode_init_static(void)
1213 {
1214 63 init_uni_dc_tab();
1215
1216 63 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1217 63 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1218
1219
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 504 for (int f_code = MAX_FCODE; f_code > 0; f_code--) {
1220
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 512505 for (int mv = -(16 << f_code); mv < (16 << f_code); mv++)
1221 512064 fcode_tab[mv + MAX_MV] = f_code;
1222 }
1223 63 }
1224
1225 63 static av_cold int encode_init(AVCodecContext *avctx)
1226 {
1227 static AVOnce init_static_once = AV_ONCE_INIT;
1228 63 Mpeg4EncContext *const m4 = avctx->priv_data;
1229 63 MPVMainEncContext *const m = &m4->m;
1230 63 MPVEncContext *const s = &m->s;
1231 int ret;
1232
1233
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 63 if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1234 ✗ av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1235 ✗ return AVERROR(EINVAL);
1236 }
1237
1238 63 m->encode_picture_header = mpeg4_encode_picture_header;
1239 63 s->encode_mb = mpeg4_encode_mb;
1240
1241 63 m->fcode_tab = fcode_tab + MAX_MV;
1242
1243 63 s->min_qcoeff = -2048;
1244 63 s->max_qcoeff = 2047;
1245 63 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
1246 63 s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
1247 63 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
1248 63 s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
1249 63 s->luma_dc_vlc_length = uni_DCtab_lum_len;
1250 63 s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1251 63 s->c.y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
1252 63 s->c.c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
1253
1254 63 ff_qpeldsp_init(&s->c.qdsp);
1255
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 63 if ((ret = ff_mpv_encode_init(avctx)) < 0)
1256 ✗ return ret;
1257
1258 63 ff_thread_once(&init_static_once, mpeg4_encode_init_static);
1259
1260
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 63 if (avctx->time_base.den > (1 << 16) - 1) {
1261 ✗ av_log(avctx, AV_LOG_ERROR,
1262 "timebase %d/%d not supported by MPEG 4 standard, "
1263 "the maximum admitted value for the timebase denominator "
1264 "is %d\n", avctx->time_base.num, avctx->time_base.den,
1265 (1 << 16) - 1);
1266 ✗ return AVERROR(EINVAL);
1267 }
1268
1269 63 m4->time_increment_bits = av_log2(avctx->time_base.den - 1) + 1;
1270
1271
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 63 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
1272 21 avctx->extradata = av_malloc(1024);
1273
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 21 if (!avctx->extradata)
1274 ✗ return AVERROR(ENOMEM);
1275 21 init_put_bits(&s->pb, avctx->extradata, 1024);
1276
1277 21 mpeg4_encode_visual_object_header(m);
1278 21 mpeg4_encode_vol_header(m4, 0, 0);
1279
1280 // ff_mpeg4_stuffing(&s->pb); ?
1281 21 flush_put_bits(&s->pb);
1282 21 avctx->extradata_size = put_bytes_output(&s->pb);
1283 }
1284 63 return 0;
1285 }
1286
1287 1760 void ff_mpeg4_init_partitions(MPVEncContext *const s)
1288 {
1289 1760 uint8_t *start = put_bits_ptr(&s->pb);
1290 1760 uint8_t *end = s->pb.buf_end;
1291 1760 int size = end - start;
1292 1760 int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1293 1760 int tex_size = (size - 2 * pb_size) & (~3);
1294
1295 1760 set_put_bits_buffer_size(&s->pb, pb_size);
1296 1760 init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1297 1760 init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1298 1760 }
1299
1300 1760 void ff_mpeg4_merge_partitions(MPVEncContext *const s)
1301 {
1302 1760 const int pb2_len = put_bits_count(&s->pb2);
1303 1760 const int tex_pb_len = put_bits_count(&s->tex_pb);
1304 1760 const int bits = put_bits_count(&s->pb);
1305
1306
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 1760 if (s->c.pict_type == AV_PICTURE_TYPE_I) {
1307 512 put_bits(&s->pb, 19, DC_MARKER);
1308 512 s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1309 512 s->i_tex_bits += tex_pb_len;
1310 } else {
1311 1248 put_bits(&s->pb, 17, MOTION_MARKER);
1312 1248 s->misc_bits += 17 + pb2_len;
1313 1248 s->mv_bits += bits - s->last_bits;
1314 1248 s->p_tex_bits += tex_pb_len;
1315 }
1316
1317 1760 flush_put_bits(&s->pb2);
1318 1760 flush_put_bits(&s->tex_pb);
1319
1320 1760 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1321 1760 ff_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1322 1760 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1323 1760 s->last_bits = put_bits_count(&s->pb);
1324 1760 }
1325
1326 3323 void ff_mpeg4_encode_video_packet_header(MPVEncContext *const s)
1327 {
1328 3323 int mb_num_bits = av_log2(s->c.mb_num - 1) + 1;
1329
1330 3323 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s->c.pict_type, s->f_code, s->b_code), 0);
1331 3323 put_bits(&s->pb, 1, 1);
1332
1333 3323 put_bits(&s->pb, mb_num_bits, s->c.mb_x + s->c.mb_y * s->c.mb_width);
1334 3323 put_bits(&s->pb, 5 /* quant_precision */, s->c.qscale);
1335 3323 put_bits(&s->pb, 1, 0); /* no HEC */
1336 3323 }
1337
1338 #define OFFSET(x) offsetof(MPVEncContext, x)
1339 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1340 static const AVOption options[] = {
1341 { "data_partitioning", "Use data partitioning.", FF_MPV_OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1342 { "alternate_scan", "Enable alternate scantable.", OFFSET(c.alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1343 { "mpeg_quant", "Use MPEG quantizers instead of H.263",
1344 OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE },
1345 FF_MPV_COMMON_BFRAME_OPTS
1346 FF_MPV_COMMON_OPTS
1347 FF_MPV_COMMON_MOTION_EST_OPTS
1348 FF_MPEG4_PROFILE_OPTS
1349 { NULL },
1350 };
1351
1352 static const AVClass mpeg4enc_class = {
1353 .class_name = "MPEG4 encoder",
1354 .item_name = av_default_item_name,
1355 .option = options,
1356 .version = LIBAVUTIL_VERSION_INT,
1357 };
1358
1359 const FFCodec ff_mpeg4_encoder = {
1360 .p.name = "mpeg4",
1361 CODEC_LONG_NAME("MPEG-4 part 2"),
1362 .p.type = AVMEDIA_TYPE_VIDEO,
1363 .p.id = AV_CODEC_ID_MPEG4,
1364 .priv_data_size = sizeof(Mpeg4EncContext),
1365 .init = encode_init,
1366 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
1367 .close = ff_mpv_encode_end,
1368 CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
1369 .color_ranges = AVCOL_RANGE_MPEG,
1370 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
1371 AV_CODEC_CAP_SLICE_THREADS |
1372 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1373 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1374 .p.priv_class = &mpeg4enc_class,
1375 };
1376