LCOV - code coverage report
Current view: top level - libavcodec - mpeg4videoenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 617 784 78.7 %
Date: 2017-12-17 11:58:42 Functions: 21 23 91.3 %

          Line data    Source code
       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/opt.h"
      26             : #include "mpegutils.h"
      27             : #include "mpegvideo.h"
      28             : #include "h263.h"
      29             : #include "mpeg4video.h"
      30             : 
      31             : /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
      32             :  * differences in MPEG-4. Unified in the sense that the specification specifies
      33             :  * this encoding in several steps. */
      34             : static uint8_t  uni_DCtab_lum_len[512];
      35             : static uint8_t  uni_DCtab_chrom_len[512];
      36             : static uint16_t uni_DCtab_lum_bits[512];
      37             : static uint16_t uni_DCtab_chrom_bits[512];
      38             : 
      39             : /* Unified encoding tables for run length encoding of coefficients.
      40             :  * Unified in the sense that the specification specifies the encoding in several steps. */
      41             : static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
      42             : static uint8_t  uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
      43             : static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
      44             : static uint8_t  uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
      45             : 
      46             : //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
      47             : //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
      48             : #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
      49             : 
      50             : /* MPEG-4
      51             :  * inter
      52             :  * max level: 24/6
      53             :  * max run: 53/63
      54             :  *
      55             :  * intra
      56             :  * max level: 53/16
      57             :  * max run: 29/41
      58             :  */
      59             : 
      60             : /**
      61             :  * Return the number of bits that encoding the 8x8 block in block would need.
      62             :  * @param[in]  block_last_index last index in scantable order that refers to a non zero element in block.
      63             :  */
      64      585288 : static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
      65             :                                  int block_last_index, uint8_t scantable[64])
      66             : {
      67      585288 :     int last = 0;
      68             :     int j;
      69      585288 :     int rate = 0;
      70             : 
      71    12547868 :     for (j = 1; j <= block_last_index; j++) {
      72    11962580 :         const int index = scantable[j];
      73    11962580 :         int level = block[index];
      74    11962580 :         if (level) {
      75     5655201 :             level += 64;
      76     5655201 :             if ((level & (~127)) == 0) {
      77     5653593 :                 if (j < block_last_index)
      78     5215921 :                     rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
      79             :                 else
      80      437672 :                     rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
      81             :             } else
      82        1608 :                 rate += s->ac_esc_length;
      83             : 
      84     5655201 :             last = j;
      85             :         }
      86             :     }
      87             : 
      88      585288 :     return rate;
      89             : }
      90             : 
      91             : /**
      92             :  * Restore the ac coefficients in block that have been changed by decide_ac_pred().
      93             :  * This function also restores s->block_last_index.
      94             :  * @param[in,out] block MB coefficients, these will be restored
      95             :  * @param[in] dir ac prediction direction for each 8x8 block
      96             :  * @param[out] st scantable for each 8x8 block
      97             :  * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
      98             :  */
      99       48774 : static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
     100             :                                      const int dir[6], uint8_t *st[6],
     101             :                                      const int zigzag_last_index[6])
     102             : {
     103             :     int i, n;
     104       48774 :     memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
     105             : 
     106      341418 :     for (n = 0; n < 6; n++) {
     107      292644 :         int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
     108             : 
     109      292644 :         st[n] = s->intra_scantable.permutated;
     110      292644 :         if (dir[n]) {
     111             :             /* top prediction */
     112      641160 :             for (i = 1; i < 8; i++)
     113      561015 :                 block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
     114             :         } else {
     115             :             /* left prediction */
     116     1699992 :             for (i = 1; i < 8; i++)
     117     1487493 :                 block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
     118             :         }
     119             :     }
     120       48774 : }
     121             : 
     122             : /**
     123             :  * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
     124             :  * This function will also update s->block_last_index and s->ac_val.
     125             :  * @param[in,out] block MB coefficients, these will be updated if 1 is returned
     126             :  * @param[in] dir ac prediction direction for each 8x8 block
     127             :  * @param[out] st scantable for each 8x8 block
     128             :  * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
     129             :  */
     130       48774 : static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
     131             :                                  const int dir[6], uint8_t *st[6],
     132             :                                  int zigzag_last_index[6])
     133             : {
     134       48774 :     int score = 0;
     135             :     int i, n;
     136       48774 :     int8_t *const qscale_table = s->current_picture.qscale_table;
     137             : 
     138       48774 :     memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
     139             : 
     140      341418 :     for (n = 0; n < 6; n++) {
     141             :         int16_t *ac_val, *ac_val1;
     142             : 
     143      292644 :         score -= get_block_rate(s, block[n], s->block_last_index[n],
     144      292644 :                                 s->intra_scantable.permutated);
     145             : 
     146      292644 :         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;
     147      292644 :         ac_val1 = ac_val;
     148      292644 :         if (dir[n]) {
     149       80145 :             const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
     150             :             /* top prediction */
     151       80145 :             ac_val -= s->block_wrap[n] * 16;
     152      160290 :             if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
     153             :                 /* same qscale */
     154      641160 :                 for (i = 1; i < 8; i++) {
     155      561015 :                     const int level = block[n][s->idsp.idct_permutation[i]];
     156      561015 :                     block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
     157      561015 :                     ac_val1[i]     = block[n][s->idsp.idct_permutation[i << 3]];
     158      561015 :                     ac_val1[i + 8] = level;
     159             :                 }
     160             :             } else {
     161             :                 /* different qscale, we must rescale */
     162           0 :                 for (i = 1; i < 8; i++) {
     163           0 :                     const int level = block[n][s->idsp.idct_permutation[i]];
     164           0 :                     block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
     165           0 :                     ac_val1[i]     = block[n][s->idsp.idct_permutation[i << 3]];
     166           0 :                     ac_val1[i + 8] = level;
     167             :                 }
     168             :             }
     169       80145 :             st[n] = s->intra_h_scantable.permutated;
     170             :         } else {
     171      212499 :             const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
     172             :             /* left prediction */
     173      212499 :             ac_val -= 16;
     174      424998 :             if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
     175             :                 /* same qscale */
     176     1699992 :                 for (i = 1; i < 8; i++) {
     177     1487493 :                     const int level = block[n][s->idsp.idct_permutation[i << 3]];
     178     1487493 :                     block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
     179     1487493 :                     ac_val1[i]     = level;
     180     1487493 :                     ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
     181             :                 }
     182             :             } else {
     183             :                 /* different qscale, we must rescale */
     184           0 :                 for (i = 1; i < 8; i++) {
     185           0 :                     const int level = block[n][s->idsp.idct_permutation[i << 3]];
     186           0 :                     block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
     187           0 :                     ac_val1[i]     = level;
     188           0 :                     ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
     189             :                 }
     190             :             }
     191      212499 :             st[n] = s->intra_v_scantable.permutated;
     192             :         }
     193             : 
     194    12538840 :         for (i = 63; i > 0; i--)  // FIXME optimize
     195    12470313 :             if (block[n][st[n][i]])
     196      224117 :                 break;
     197      292644 :         s->block_last_index[n] = i;
     198             : 
     199      292644 :         score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
     200             :     }
     201             : 
     202       48774 :     if (score < 0) {
     203        7332 :         return 1;
     204             :     } else {
     205       41442 :         restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
     206       41442 :         return 0;
     207             :     }
     208             : }
     209             : 
     210             : /**
     211             :  * modify mb_type & qscale so that encoding is actually possible in MPEG-4
     212             :  */
     213         400 : void ff_clean_mpeg4_qscales(MpegEncContext *s)
     214             : {
     215             :     int i;
     216         400 :     int8_t *const qscale_table = s->current_picture.qscale_table;
     217             : 
     218         400 :     ff_clean_h263_qscales(s);
     219             : 
     220         400 :     if (s->pict_type == AV_PICTURE_TYPE_B) {
     221         256 :         int odd = 0;
     222             :         /* ok, come on, this isn't funny anymore, there's more code for
     223             :          * handling this MPEG-4 mess than for the actual adaptive quantization */
     224             : 
     225       76864 :         for (i = 0; i < s->mb_num; i++) {
     226       76608 :             int mb_xy = s->mb_index2xy[i];
     227       76608 :             odd += qscale_table[mb_xy] & 1;
     228             :         }
     229             : 
     230         256 :         if (2 * odd > s->mb_num)
     231         143 :             odd = 1;
     232             :         else
     233         113 :             odd = 0;
     234             : 
     235       76864 :         for (i = 0; i < s->mb_num; i++) {
     236       76608 :             int mb_xy = s->mb_index2xy[i];
     237       76608 :             if ((qscale_table[mb_xy] & 1) != odd)
     238       10413 :                 qscale_table[mb_xy]++;
     239       76608 :             if (qscale_table[mb_xy] > 31)
     240           0 :                 qscale_table[mb_xy] = 31;
     241             :         }
     242             : 
     243       76608 :         for (i = 1; i < s->mb_num; i++) {
     244       76352 :             int mb_xy = s->mb_index2xy[i];
     245       90278 :             if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
     246       13926 :                 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
     247       13915 :                 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
     248             :             }
     249             :         }
     250             :     }
     251         400 : }
     252             : 
     253             : /**
     254             :  * Encode the dc value.
     255             :  * @param n block index (0-3 are luma, 4-5 are chroma)
     256             :  */
     257     1205160 : static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
     258             : {
     259             :     /* DC will overflow if level is outside the [-255,255] range. */
     260     1205160 :     level += 256;
     261     1205160 :     if (n < 4) {
     262             :         /* luminance */
     263      803440 :         put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
     264             :     } else {
     265             :         /* chrominance */
     266      401720 :         put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
     267             :     }
     268     1205160 : }
     269             : 
     270           0 : static inline int mpeg4_get_dc_length(int level, int n)
     271             : {
     272           0 :     if (n < 4)
     273           0 :         return uni_DCtab_lum_len[level + 256];
     274             :     else
     275           0 :         return uni_DCtab_chrom_len[level + 256];
     276             : }
     277             : 
     278             : /**
     279             :  * Encode an 8x8 block.
     280             :  * @param n block index (0-3 are luma, 4-5 are chroma)
     281             :  */
     282    10110834 : static inline void mpeg4_encode_block(MpegEncContext *s,
     283             :                                       int16_t *block, int n, int intra_dc,
     284             :                                       uint8_t *scan_table, PutBitContext *dc_pb,
     285             :                                       PutBitContext *ac_pb)
     286             : {
     287             :     int i, last_non_zero;
     288             :     uint32_t *bits_tab;
     289             :     uint8_t *len_tab;
     290    10110834 :     const int last_index = s->block_last_index[n];
     291             : 
     292    10110834 :     if (s->mb_intra) {  // Note gcc (3.2.1 at least) will optimize this away
     293             :         /* MPEG-4 based DC predictor */
     294     1205160 :         mpeg4_encode_dc(dc_pb, intra_dc, n);
     295     1205160 :         if (last_index < 1)
     296      279085 :             return;
     297      926075 :         i = 1;
     298      926075 :         bits_tab = uni_mpeg4_intra_rl_bits;
     299      926075 :         len_tab  = uni_mpeg4_intra_rl_len;
     300             :     } else {
     301     8905674 :         if (last_index < 0)
     302     5123090 :             return;
     303     3782584 :         i = 0;
     304     3782584 :         bits_tab = uni_mpeg4_inter_rl_bits;
     305     3782584 :         len_tab  = uni_mpeg4_inter_rl_len;
     306             :     }
     307             : 
     308             :     /* AC coefs */
     309     4708659 :     last_non_zero = i - 1;
     310   131763528 :     for (; i < last_index; i++) {
     311   127054869 :         int level = block[scan_table[i]];
     312   127054869 :         if (level) {
     313    42037994 :             int run = i - last_non_zero - 1;
     314    42037994 :             level += 64;
     315    42037994 :             if ((level & (~127)) == 0) {
     316    42020003 :                 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
     317    42020003 :                 put_bits(ac_pb, len_tab[index], bits_tab[index]);
     318             :             } else {  // ESC3
     319       17991 :                 put_bits(ac_pb,
     320             :                          7 + 2 + 1 + 6 + 1 + 12 + 1,
     321       17991 :                          (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
     322       17991 :                          (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
     323             :             }
     324    42037994 :             last_non_zero = i;
     325             :         }
     326             :     }
     327             :     /* if (i <= last_index) */ {
     328     4708659 :         int level = block[scan_table[i]];
     329     4708659 :         int run   = i - last_non_zero - 1;
     330     4708659 :         level += 64;
     331     4708659 :         if ((level & (~127)) == 0) {
     332     4708252 :             const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
     333     4708252 :             put_bits(ac_pb, len_tab[index], bits_tab[index]);
     334             :         } else {  // ESC3
     335         407 :             put_bits(ac_pb,
     336             :                      7 + 2 + 1 + 6 + 1 + 12 + 1,
     337         407 :                      (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
     338         407 :                      (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
     339             :         }
     340             :     }
     341             : }
     342             : 
     343           0 : static int mpeg4_get_block_length(MpegEncContext *s,
     344             :                                   int16_t *block, int n,
     345             :                                   int intra_dc, uint8_t *scan_table)
     346             : {
     347             :     int i, last_non_zero;
     348             :     uint8_t *len_tab;
     349           0 :     const int last_index = s->block_last_index[n];
     350           0 :     int len = 0;
     351             : 
     352           0 :     if (s->mb_intra) {  // Note gcc (3.2.1 at least) will optimize this away
     353             :         /* MPEG-4 based DC predictor */
     354           0 :         len += mpeg4_get_dc_length(intra_dc, n);
     355           0 :         if (last_index < 1)
     356           0 :             return len;
     357           0 :         i = 1;
     358           0 :         len_tab = uni_mpeg4_intra_rl_len;
     359             :     } else {
     360           0 :         if (last_index < 0)
     361           0 :             return 0;
     362           0 :         i = 0;
     363           0 :         len_tab = uni_mpeg4_inter_rl_len;
     364             :     }
     365             : 
     366             :     /* AC coefs */
     367           0 :     last_non_zero = i - 1;
     368           0 :     for (; i < last_index; i++) {
     369           0 :         int level = block[scan_table[i]];
     370           0 :         if (level) {
     371           0 :             int run = i - last_non_zero - 1;
     372           0 :             level += 64;
     373           0 :             if ((level & (~127)) == 0) {
     374           0 :                 const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
     375           0 :                 len += len_tab[index];
     376             :             } else {  // ESC3
     377           0 :                 len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
     378             :             }
     379           0 :             last_non_zero = i;
     380             :         }
     381             :     }
     382             :     /* if (i <= last_index) */ {
     383           0 :         int level = block[scan_table[i]];
     384           0 :         int run   = i - last_non_zero - 1;
     385           0 :         level += 64;
     386           0 :         if ((level & (~127)) == 0) {
     387           0 :             const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
     388           0 :             len += len_tab[index];
     389             :         } else {  // ESC3
     390           0 :             len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
     391             :         }
     392             :     }
     393             : 
     394           0 :     return len;
     395             : }
     396             : 
     397     1685139 : static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
     398             :                                        int intra_dc[6], uint8_t **scan_table,
     399             :                                        PutBitContext *dc_pb,
     400             :                                        PutBitContext *ac_pb)
     401             : {
     402             :     int i;
     403             : 
     404     1685139 :     if (scan_table) {
     405      200860 :         if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
     406           0 :             for (i = 0; i < 6; i++)
     407           0 :                 skip_put_bits(&s->pb,
     408           0 :                               mpeg4_get_block_length(s, block[i], i,
     409           0 :                                                      intra_dc[i], scan_table[i]));
     410             :         } else {
     411             :             /* encode each block */
     412     1406020 :             for (i = 0; i < 6; i++)
     413     2410320 :                 mpeg4_encode_block(s, block[i], i,
     414     2410320 :                                    intra_dc[i], scan_table[i], dc_pb, ac_pb);
     415             :         }
     416             :     } else {
     417     1484279 :         if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
     418           0 :             for (i = 0; i < 6; i++)
     419           0 :                 skip_put_bits(&s->pb,
     420           0 :                               mpeg4_get_block_length(s, block[i], i, 0,
     421           0 :                                                      s->intra_scantable.permutated));
     422             :         } else {
     423             :             /* encode each block */
     424    10389953 :             for (i = 0; i < 6; i++)
     425     8905674 :                 mpeg4_encode_block(s, block[i], i, 0,
     426     8905674 :                                    s->intra_scantable.permutated, dc_pb, ac_pb);
     427             :         }
     428             :     }
     429     1685139 : }
     430             : 
     431      765962 : static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
     432             :                             int motion_x, int motion_y, int mb_type)
     433             : {
     434      765962 :     int cbp = 0, i;
     435             : 
     436      765962 :     if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
     437           0 :         int score        = 0;
     438           0 :         const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
     439             : 
     440           0 :         for (i = 0; i < 6; i++) {
     441           0 :             if (s->coded_score[i] < 0) {
     442           0 :                 score += s->coded_score[i];
     443           0 :                 cbp   |= 1 << (5 - i);
     444             :             }
     445             :         }
     446             : 
     447           0 :         if (cbp) {
     448           0 :             int zero_score = -6;
     449           0 :             if ((motion_x | motion_y | s->dquant | mb_type) == 0)
     450           0 :                 zero_score -= 4;  // 2 * MV + mb_type + cbp bit
     451             : 
     452           0 :             zero_score *= lambda;
     453           0 :             if (zero_score <= score)
     454           0 :                 cbp = 0;
     455             :         }
     456             : 
     457           0 :         for (i = 0; i < 6; i++) {
     458           0 :             if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
     459           0 :                 s->block_last_index[i] = -1;
     460           0 :                 s->bdsp.clear_block(s->block[i]);
     461             :             }
     462             :         }
     463             :     } else {
     464     5361734 :         for (i = 0; i < 6; i++) {
     465     4595772 :             if (s->block_last_index[i] >= 0)
     466     1642053 :                 cbp |= 1 << (5 - i);
     467             :         }
     468             :     }
     469      765962 :     return cbp;
     470             : }
     471             : 
     472             : // FIXME this is duplicated to h263.c
     473             : static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
     474             : 
     475     1750611 : void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
     476             :                         int motion_x, int motion_y)
     477             : {
     478             :     int cbpc, cbpy, pred_x, pred_y;
     479     1750611 :     PutBitContext *const pb2    = s->data_partitioning ? &s->pb2 : &s->pb;
     480     1750611 :     PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
     481     1750611 :     PutBitContext *const dc_pb  = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
     482     1750611 :     const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
     483             : 
     484     1750611 :     if (!s->mb_intra) {
     485             :         int i, cbp;
     486             : 
     487     1549751 :         if (s->pict_type == AV_PICTURE_TYPE_B) {
     488             :             /* convert from mv_dir to type */
     489             :             static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
     490      766080 :             int mb_type = mb_type_table[s->mv_dir];
     491             : 
     492      766080 :             if (s->mb_x == 0) {
     493      110403 :                 for (i = 0; i < 2; i++)
     494       73602 :                     s->last_mv[i][0][0] =
     495       73602 :                     s->last_mv[i][0][1] =
     496       73602 :                     s->last_mv[i][1][0] =
     497       73602 :                     s->last_mv[i][1][1] = 0;
     498             :             }
     499             : 
     500             :             av_assert2(s->dquant >= -2 && s->dquant <= 2);
     501             :             av_assert2((s->dquant & 1) == 0);
     502             :             av_assert2(mb_type >= 0);
     503             : 
     504             :             /* nothing to do if this MB was skipped in the next P-frame */
     505      766080 :             if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) {  // FIXME avoid DCT & ...
     506         118 :                 s->skip_count++;
     507         118 :                 s->mv[0][0][0] =
     508         118 :                 s->mv[0][0][1] =
     509         118 :                 s->mv[1][0][0] =
     510         118 :                 s->mv[1][0][1] = 0;
     511         118 :                 s->mv_dir  = MV_DIR_FORWARD;  // doesn't matter
     512         118 :                 s->qscale -= s->dquant;
     513             : //                s->mb_skipped = 1;
     514             : 
     515       65590 :                 return;
     516             :             }
     517             : 
     518      765962 :             cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
     519             : 
     520      765962 :             if ((cbp | motion_x | motion_y | mb_type) == 0) {
     521             :                 /* direct MB with MV={0,0} */
     522             :                 av_assert2(s->dquant == 0);
     523             : 
     524       44007 :                 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
     525             : 
     526       44007 :                 if (interleaved_stats) {
     527           0 :                     s->misc_bits++;
     528           0 :                     s->last_bits++;
     529             :                 }
     530       44007 :                 s->skip_count++;
     531       44007 :                 return;
     532             :             }
     533             : 
     534      721955 :             put_bits(&s->pb, 1, 0);            /* mb coded modb1=0 */
     535      721955 :             put_bits(&s->pb, 1, cbp ? 0 : 1);  /* modb2 */ // FIXME merge
     536      721955 :             put_bits(&s->pb, mb_type + 1, 1);  // this table is so simple that we don't need it :)
     537      721955 :             if (cbp)
     538      480909 :                 put_bits(&s->pb, 6, cbp);
     539             : 
     540      721955 :             if (cbp && mb_type) {
     541      666202 :                 if (s->dquant)
     542       41971 :                     put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
     543             :                 else
     544      291130 :                     put_bits(&s->pb, 1, 0);
     545             :             } else
     546      388854 :                 s->qscale -= s->dquant;
     547             : 
     548      721955 :             if (!s->progressive_sequence) {
     549           0 :                 if (cbp)
     550           0 :                     put_bits(&s->pb, 1, s->interlaced_dct);
     551           0 :                 if (mb_type)                  // not direct mode
     552           0 :                     put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
     553             :             }
     554             : 
     555      721955 :             if (interleaved_stats)
     556           0 :                 s->misc_bits += get_bits_diff(s);
     557             : 
     558      721955 :             if (!mb_type) {
     559             :                 av_assert2(s->mv_dir & MV_DIRECT);
     560      172311 :                 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
     561      172311 :                 s->b_count++;
     562      172311 :                 s->f_count++;
     563             :             } else {
     564             :                 av_assert2(mb_type > 0 && mb_type < 4);
     565      549644 :                 if (s->mv_type != MV_TYPE_FIELD) {
     566      549644 :                     if (s->mv_dir & MV_DIR_FORWARD) {
     567     1117200 :                         ff_h263_encode_motion_vector(s,
     568      372400 :                                                      s->mv[0][0][0] - s->last_mv[0][0][0],
     569      372400 :                                                      s->mv[0][0][1] - s->last_mv[0][0][1],
     570             :                                                      s->f_code);
     571      372400 :                         s->last_mv[0][0][0] =
     572      372400 :                         s->last_mv[0][1][0] = s->mv[0][0][0];
     573      372400 :                         s->last_mv[0][0][1] =
     574      372400 :                         s->last_mv[0][1][1] = s->mv[0][0][1];
     575      372400 :                         s->f_count++;
     576             :                     }
     577      549644 :                     if (s->mv_dir & MV_DIR_BACKWARD) {
     578     1127565 :                         ff_h263_encode_motion_vector(s,
     579      375855 :                                                      s->mv[1][0][0] - s->last_mv[1][0][0],
     580      375855 :                                                      s->mv[1][0][1] - s->last_mv[1][0][1],
     581             :                                                      s->b_code);
     582      375855 :                         s->last_mv[1][0][0] =
     583      375855 :                         s->last_mv[1][1][0] = s->mv[1][0][0];
     584      375855 :                         s->last_mv[1][0][1] =
     585      375855 :                         s->last_mv[1][1][1] = s->mv[1][0][1];
     586      375855 :                         s->b_count++;
     587             :                     }
     588             :                 } else {
     589           0 :                     if (s->mv_dir & MV_DIR_FORWARD) {
     590           0 :                         put_bits(&s->pb, 1, s->field_select[0][0]);
     591           0 :                         put_bits(&s->pb, 1, s->field_select[0][1]);
     592             :                     }
     593           0 :                     if (s->mv_dir & MV_DIR_BACKWARD) {
     594           0 :                         put_bits(&s->pb, 1, s->field_select[1][0]);
     595           0 :                         put_bits(&s->pb, 1, s->field_select[1][1]);
     596             :                     }
     597           0 :                     if (s->mv_dir & MV_DIR_FORWARD) {
     598           0 :                         for (i = 0; i < 2; i++) {
     599           0 :                             ff_h263_encode_motion_vector(s,
     600           0 :                                                          s->mv[0][i][0] - s->last_mv[0][i][0],
     601           0 :                                                          s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
     602             :                                                          s->f_code);
     603           0 :                             s->last_mv[0][i][0] = s->mv[0][i][0];
     604           0 :                             s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
     605             :                         }
     606           0 :                         s->f_count++;
     607             :                     }
     608           0 :                     if (s->mv_dir & MV_DIR_BACKWARD) {
     609           0 :                         for (i = 0; i < 2; i++) {
     610           0 :                             ff_h263_encode_motion_vector(s,
     611           0 :                                                          s->mv[1][i][0] - s->last_mv[1][i][0],
     612           0 :                                                          s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
     613             :                                                          s->b_code);
     614           0 :                             s->last_mv[1][i][0] = s->mv[1][i][0];
     615           0 :                             s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
     616             :                         }
     617           0 :                         s->b_count++;
     618             :                     }
     619             :                 }
     620             :             }
     621             : 
     622      721955 :             if (interleaved_stats)
     623           0 :                 s->mv_bits += get_bits_diff(s);
     624             : 
     625      721955 :             mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
     626             : 
     627      721955 :             if (interleaved_stats)
     628           0 :                 s->p_tex_bits += get_bits_diff(s);
     629             :         } else { /* s->pict_type==AV_PICTURE_TYPE_B */
     630      783671 :             cbp = get_p_cbp(s, block, motion_x, motion_y);
     631             : 
     632      834269 :             if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
     633       50598 :                 s->mv_type == MV_TYPE_16X16) {
     634             :                 /* Check if the B-frames can skip it too, as we must skip it
     635             :                  * if we skip here why didn't they just compress
     636             :                  * the skip-mb bits instead of reusing them ?! */
     637       21667 :                 if (s->max_b_frames > 0) {
     638             :                     int i;
     639             :                     int x, y, offset;
     640             :                     uint8_t *p_pic;
     641             : 
     642         686 :                     x = s->mb_x * 16;
     643         686 :                     y = s->mb_y * 16;
     644             : 
     645         686 :                     offset = x + y * s->linesize;
     646         686 :                     p_pic  = s->new_picture.f->data[0] + offset;
     647             : 
     648         686 :                     s->mb_skipped = 1;
     649         858 :                     for (i = 0; i < s->max_b_frames; i++) {
     650             :                         uint8_t *b_pic;
     651             :                         int diff;
     652         772 :                         Picture *pic = s->reordered_input_picture[i + 1];
     653             : 
     654         772 :                         if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
     655             :                             break;
     656             : 
     657         492 :                         b_pic = pic->f->data[0] + offset;
     658         492 :                         if (!pic->shared)
     659         492 :                             b_pic += INPLACE_OFFSET;
     660             : 
     661         492 :                         if (x + 16 > s->width || y + 16 > s->height) {
     662             :                             int x1, y1;
     663           0 :                             int xe = FFMIN(16, s->width - x);
     664           0 :                             int ye = FFMIN(16, s->height - y);
     665           0 :                             diff = 0;
     666           0 :                             for (y1 = 0; y1 < ye; y1++) {
     667           0 :                                 for (x1 = 0; x1 < xe; x1++) {
     668           0 :                                     diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]);
     669             :                                 }
     670             :                             }
     671           0 :                             diff = diff * 256 / (xe * ye);
     672             :                         } else {
     673         492 :                             diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
     674             :                         }
     675         492 :                         if (diff > s->qscale * 70) {  // FIXME check that 70 is optimal
     676         320 :                             s->mb_skipped = 0;
     677         320 :                             break;
     678             :                         }
     679             :                     }
     680             :                 } else
     681       20981 :                     s->mb_skipped = 1;
     682             : 
     683       21667 :                 if (s->mb_skipped == 1) {
     684             :                     /* skip macroblock */
     685       21347 :                     put_bits(&s->pb, 1, 1);
     686             : 
     687       21347 :                     if (interleaved_stats) {
     688           0 :                         s->misc_bits++;
     689           0 :                         s->last_bits++;
     690             :                     }
     691       21347 :                     s->skip_count++;
     692             : 
     693       21347 :                     return;
     694             :                 }
     695             :             }
     696             : 
     697      762324 :             put_bits(&s->pb, 1, 0);     /* mb coded */
     698      762324 :             cbpc  = cbp & 3;
     699      762324 :             cbpy  = cbp >> 2;
     700      762324 :             cbpy ^= 0xf;
     701      762324 :             if (s->mv_type == MV_TYPE_16X16) {
     702      553114 :                 if (s->dquant)
     703       43645 :                     cbpc += 8;
     704     1106228 :                 put_bits(&s->pb,
     705      553114 :                          ff_h263_inter_MCBPC_bits[cbpc],
     706      553114 :                          ff_h263_inter_MCBPC_code[cbpc]);
     707             : 
     708      553114 :                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
     709      553114 :                 if (s->dquant)
     710       43645 :                     put_bits(pb2, 2, dquant_code[s->dquant + 2]);
     711             : 
     712      553114 :                 if (!s->progressive_sequence) {
     713           0 :                     if (cbp)
     714           0 :                         put_bits(pb2, 1, s->interlaced_dct);
     715           0 :                     put_bits(pb2, 1, 0);
     716             :                 }
     717             : 
     718      553114 :                 if (interleaved_stats)
     719           0 :                     s->misc_bits += get_bits_diff(s);
     720             : 
     721             :                 /* motion vectors: 16x16 mode */
     722      553114 :                 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
     723             : 
     724      553114 :                 ff_h263_encode_motion_vector(s,
     725             :                                              motion_x - pred_x,
     726             :                                              motion_y - pred_y,
     727             :                                              s->f_code);
     728      209210 :             } else if (s->mv_type == MV_TYPE_FIELD) {
     729           0 :                 if (s->dquant)
     730           0 :                     cbpc += 8;
     731           0 :                 put_bits(&s->pb,
     732           0 :                          ff_h263_inter_MCBPC_bits[cbpc],
     733           0 :                          ff_h263_inter_MCBPC_code[cbpc]);
     734             : 
     735           0 :                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
     736           0 :                 if (s->dquant)
     737           0 :                     put_bits(pb2, 2, dquant_code[s->dquant + 2]);
     738             : 
     739             :                 av_assert2(!s->progressive_sequence);
     740           0 :                 if (cbp)
     741           0 :                     put_bits(pb2, 1, s->interlaced_dct);
     742           0 :                 put_bits(pb2, 1, 1);
     743             : 
     744           0 :                 if (interleaved_stats)
     745           0 :                     s->misc_bits += get_bits_diff(s);
     746             : 
     747             :                 /* motion vectors: 16x8 interlaced mode */
     748           0 :                 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
     749           0 :                 pred_y /= 2;
     750             : 
     751           0 :                 put_bits(&s->pb, 1, s->field_select[0][0]);
     752           0 :                 put_bits(&s->pb, 1, s->field_select[0][1]);
     753             : 
     754           0 :                 ff_h263_encode_motion_vector(s,
     755           0 :                                              s->mv[0][0][0] - pred_x,
     756           0 :                                              s->mv[0][0][1] - pred_y,
     757             :                                              s->f_code);
     758           0 :                 ff_h263_encode_motion_vector(s,
     759           0 :                                              s->mv[0][1][0] - pred_x,
     760           0 :                                              s->mv[0][1][1] - pred_y,
     761             :                                              s->f_code);
     762             :             } else {
     763             :                 av_assert2(s->mv_type == MV_TYPE_8X8);
     764      418420 :                 put_bits(&s->pb,
     765      209210 :                          ff_h263_inter_MCBPC_bits[cbpc + 16],
     766      209210 :                          ff_h263_inter_MCBPC_code[cbpc + 16]);
     767      209210 :                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
     768             : 
     769      209210 :                 if (!s->progressive_sequence && cbp)
     770           0 :                     put_bits(pb2, 1, s->interlaced_dct);
     771             : 
     772      209210 :                 if (interleaved_stats)
     773           0 :                     s->misc_bits += get_bits_diff(s);
     774             : 
     775     1046050 :                 for (i = 0; i < 4; i++) {
     776             :                     /* motion vectors: 8x8 mode*/
     777      836840 :                     ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
     778             : 
     779     2510520 :                     ff_h263_encode_motion_vector(s,
     780      836840 :                                                  s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
     781      836840 :                                                  s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
     782             :                                                  s->f_code);
     783             :                 }
     784             :             }
     785             : 
     786      762324 :             if (interleaved_stats)
     787           0 :                 s->mv_bits += get_bits_diff(s);
     788             : 
     789      762324 :             mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
     790             : 
     791      762324 :             if (interleaved_stats)
     792           0 :                 s->p_tex_bits += get_bits_diff(s);
     793             : 
     794      762324 :             s->f_count++;
     795             :         }
     796             :     } else {
     797             :         int cbp;
     798             :         int dc_diff[6];  // dc values with the dc prediction subtracted
     799             :         int dir[6];      // prediction direction
     800             :         int zigzag_last_index[6];
     801             :         uint8_t *scan_table[6];
     802             :         int i;
     803             : 
     804     1406020 :         for (i = 0; i < 6; i++)
     805     1205160 :             dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
     806             : 
     807      200860 :         if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) {
     808       48774 :             s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
     809             :         } else {
     810     1064602 :             for (i = 0; i < 6; i++)
     811      912516 :                 scan_table[i] = s->intra_scantable.permutated;
     812             :         }
     813             : 
     814             :         /* compute cbp */
     815      200860 :         cbp = 0;
     816     1406020 :         for (i = 0; i < 6; i++)
     817     1205160 :             if (s->block_last_index[i] >= 1)
     818      926075 :                 cbp |= 1 << (5 - i);
     819             : 
     820      200860 :         cbpc = cbp & 3;
     821      200860 :         if (s->pict_type == AV_PICTURE_TYPE_I) {
     822      106386 :             if (s->dquant)
     823       26002 :                 cbpc += 4;
     824      212772 :             put_bits(&s->pb,
     825      106386 :                      ff_h263_intra_MCBPC_bits[cbpc],
     826      106386 :                      ff_h263_intra_MCBPC_code[cbpc]);
     827             :         } else {
     828       94474 :             if (s->dquant)
     829        5678 :                 cbpc += 8;
     830       94474 :             put_bits(&s->pb, 1, 0);     /* mb coded */
     831      188948 :             put_bits(&s->pb,
     832       94474 :                      ff_h263_inter_MCBPC_bits[cbpc + 4],
     833       94474 :                      ff_h263_inter_MCBPC_code[cbpc + 4]);
     834             :         }
     835      200860 :         put_bits(pb2, 1, s->ac_pred);
     836      200860 :         cbpy = cbp >> 2;
     837      200860 :         put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
     838      200860 :         if (s->dquant)
     839       31680 :             put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
     840             : 
     841      200860 :         if (!s->progressive_sequence)
     842           0 :             put_bits(dc_pb, 1, s->interlaced_dct);
     843             : 
     844      200860 :         if (interleaved_stats)
     845           0 :             s->misc_bits += get_bits_diff(s);
     846             : 
     847      200860 :         mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
     848             : 
     849      200860 :         if (interleaved_stats)
     850           0 :             s->i_tex_bits += get_bits_diff(s);
     851      200860 :         s->i_count++;
     852             : 
     853             :         /* restore ac coeffs & last_index stuff
     854             :          * if we messed them up with the prediction */
     855      200860 :         if (s->ac_pred)
     856        7332 :             restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
     857             :     }
     858             : }
     859             : 
     860             : /**
     861             :  * add MPEG-4 stuffing bits (01...1)
     862             :  */
     863        6494 : void ff_mpeg4_stuffing(PutBitContext *pbc)
     864             : {
     865             :     int length;
     866        6494 :     put_bits(pbc, 1, 0);
     867        6494 :     length = (-put_bits_count(pbc)) & 7;
     868        6494 :     if (length)
     869        5819 :         put_bits(pbc, length, (1 << length) - 1);
     870        6494 : }
     871             : 
     872             : /* must be called before writing the header */
     873        2490 : void ff_set_mpeg4_time(MpegEncContext *s)
     874             : {
     875        2490 :     if (s->pict_type == AV_PICTURE_TYPE_B) {
     876         640 :         ff_mpeg4_init_direct_mv(s);
     877             :     } else {
     878        1850 :         s->last_time_base = s->time_base;
     879        1850 :         s->time_base      = FFUDIV(s->time, s->avctx->time_base.den);
     880             :     }
     881        2490 : }
     882             : 
     883         255 : static void mpeg4_encode_gop_header(MpegEncContext *s)
     884             : {
     885             :     int hours, minutes, seconds;
     886             :     int64_t time;
     887             : 
     888         255 :     put_bits(&s->pb, 16, 0);
     889         255 :     put_bits(&s->pb, 16, GOP_STARTCODE);
     890             : 
     891         255 :     time = s->current_picture_ptr->f->pts;
     892         255 :     if (s->reordered_input_picture[1])
     893          81 :         time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
     894         255 :     time = time * s->avctx->time_base.num;
     895         255 :     s->last_time_base = FFUDIV(time, s->avctx->time_base.den);
     896             : 
     897         255 :     seconds = FFUDIV(time, s->avctx->time_base.den);
     898         255 :     minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
     899         255 :     hours   = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
     900         255 :     hours   = FFUMOD(hours  , 24);
     901             : 
     902         255 :     put_bits(&s->pb, 5, hours);
     903         255 :     put_bits(&s->pb, 6, minutes);
     904         255 :     put_bits(&s->pb, 1, 1);
     905         255 :     put_bits(&s->pb, 6, seconds);
     906             : 
     907         255 :     put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
     908         255 :     put_bits(&s->pb, 1, 0);  // broken link == NO
     909             : 
     910         255 :     ff_mpeg4_stuffing(&s->pb);
     911         255 : }
     912             : 
     913         213 : static void mpeg4_encode_visual_object_header(MpegEncContext *s)
     914             : {
     915             :     int profile_and_level_indication;
     916             :     int vo_ver_id;
     917             : 
     918         213 :     if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
     919           0 :         profile_and_level_indication = s->avctx->profile << 4;
     920         213 :     } else if (s->max_b_frames || s->quarter_sample) {
     921         101 :         profile_and_level_indication = 0xF0;  // adv simple
     922             :     } else {
     923         112 :         profile_and_level_indication = 0x00;  // simple
     924             :     }
     925             : 
     926         213 :     if (s->avctx->level != FF_LEVEL_UNKNOWN)
     927           0 :         profile_and_level_indication |= s->avctx->level;
     928             :     else
     929         213 :         profile_and_level_indication |= 1;   // level 1
     930             : 
     931         213 :     if (profile_and_level_indication >> 4 == 0xF)
     932         101 :         vo_ver_id = 5;
     933             :     else
     934         112 :         vo_ver_id = 1;
     935             : 
     936             :     // FIXME levels
     937             : 
     938         213 :     put_bits(&s->pb, 16, 0);
     939         213 :     put_bits(&s->pb, 16, VOS_STARTCODE);
     940             : 
     941         213 :     put_bits(&s->pb, 8, profile_and_level_indication);
     942             : 
     943         213 :     put_bits(&s->pb, 16, 0);
     944         213 :     put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
     945             : 
     946         213 :     put_bits(&s->pb, 1, 1);
     947         213 :     put_bits(&s->pb, 4, vo_ver_id);
     948         213 :     put_bits(&s->pb, 3, 1);     // priority
     949             : 
     950         213 :     put_bits(&s->pb, 4, 1);     // visual obj type== video obj
     951             : 
     952         213 :     put_bits(&s->pb, 1, 0);     // video signal type == no clue // FIXME
     953             : 
     954         213 :     ff_mpeg4_stuffing(&s->pb);
     955         213 : }
     956             : 
     957         213 : static void mpeg4_encode_vol_header(MpegEncContext *s,
     958             :                                     int vo_number,
     959             :                                     int vol_number)
     960             : {
     961             :     int vo_ver_id;
     962             : 
     963             :     if (!CONFIG_MPEG4_ENCODER)
     964             :         return;
     965             : 
     966         213 :     if (s->max_b_frames || s->quarter_sample) {
     967         101 :         vo_ver_id  = 5;
     968         101 :         s->vo_type = ADV_SIMPLE_VO_TYPE;
     969             :     } else {
     970         112 :         vo_ver_id  = 1;
     971         112 :         s->vo_type = SIMPLE_VO_TYPE;
     972             :     }
     973             : 
     974         213 :     put_bits(&s->pb, 16, 0);
     975         213 :     put_bits(&s->pb, 16, 0x100 + vo_number);        /* video obj */
     976         213 :     put_bits(&s->pb, 16, 0);
     977         213 :     put_bits(&s->pb, 16, 0x120 + vol_number);       /* video obj layer */
     978             : 
     979         213 :     put_bits(&s->pb, 1, 0);             /* random access vol */
     980         213 :     put_bits(&s->pb, 8, s->vo_type);    /* video obj type indication */
     981         213 :     if (s->workaround_bugs & FF_BUG_MS) {
     982           0 :         put_bits(&s->pb, 1, 0);         /* is obj layer id= no */
     983             :     } else {
     984         213 :         put_bits(&s->pb, 1, 1);         /* is obj layer id= yes */
     985         213 :         put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
     986         213 :         put_bits(&s->pb, 3, 1);         /* is obj layer priority */
     987             :     }
     988             : 
     989         213 :     s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
     990             : 
     991         213 :     put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
     992         213 :     if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
     993           0 :         av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
     994           0 :                    s->avctx->sample_aspect_ratio.num,  s->avctx->sample_aspect_ratio.den, 255);
     995           0 :         put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
     996           0 :         put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
     997             :     }
     998             : 
     999         213 :     if (s->workaround_bugs & FF_BUG_MS) {
    1000           0 :         put_bits(&s->pb, 1, 0);         /* vol control parameters= no @@@ */
    1001             :     } else {
    1002         213 :         put_bits(&s->pb, 1, 1);         /* vol control parameters= yes */
    1003         213 :         put_bits(&s->pb, 2, 1);         /* chroma format YUV 420/YV12 */
    1004         213 :         put_bits(&s->pb, 1, s->low_delay);
    1005         213 :         put_bits(&s->pb, 1, 0);         /* vbv parameters= no */
    1006             :     }
    1007             : 
    1008         213 :     put_bits(&s->pb, 2, RECT_SHAPE);    /* vol shape= rectangle */
    1009         213 :     put_bits(&s->pb, 1, 1);             /* marker bit */
    1010             : 
    1011         213 :     put_bits(&s->pb, 16, s->avctx->time_base.den);
    1012         213 :     if (s->time_increment_bits < 1)
    1013           0 :         s->time_increment_bits = 1;
    1014         213 :     put_bits(&s->pb, 1, 1);             /* marker bit */
    1015         213 :     put_bits(&s->pb, 1, 0);             /* fixed vop rate=no */
    1016         213 :     put_bits(&s->pb, 1, 1);             /* marker bit */
    1017         213 :     put_bits(&s->pb, 13, s->width);     /* vol width */
    1018         213 :     put_bits(&s->pb, 1, 1);             /* marker bit */
    1019         213 :     put_bits(&s->pb, 13, s->height);    /* vol height */
    1020         213 :     put_bits(&s->pb, 1, 1);             /* marker bit */
    1021         213 :     put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
    1022         213 :     put_bits(&s->pb, 1, 1);             /* obmc disable */
    1023         213 :     if (vo_ver_id == 1)
    1024         112 :         put_bits(&s->pb, 1, 0);       /* sprite enable */
    1025             :     else
    1026         101 :         put_bits(&s->pb, 2, 0);       /* sprite enable */
    1027             : 
    1028         213 :     put_bits(&s->pb, 1, 0);             /* not 8 bit == false */
    1029         213 :     put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
    1030             : 
    1031         213 :     if (s->mpeg_quant) {
    1032           0 :         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
    1033           0 :         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
    1034             :     }
    1035             : 
    1036         213 :     if (vo_ver_id != 1)
    1037         101 :         put_bits(&s->pb, 1, s->quarter_sample);
    1038         213 :     put_bits(&s->pb, 1, 1);             /* complexity estimation disable */
    1039         213 :     put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
    1040         213 :     put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
    1041         213 :     if (s->data_partitioning)
    1042          60 :         put_bits(&s->pb, 1, 0);         /* no rvlc */
    1043             : 
    1044         213 :     if (vo_ver_id != 1) {
    1045         101 :         put_bits(&s->pb, 1, 0);         /* newpred */
    1046         101 :         put_bits(&s->pb, 1, 0);         /* reduced res vop */
    1047             :     }
    1048         213 :     put_bits(&s->pb, 1, 0);             /* scalability */
    1049             : 
    1050         213 :     ff_mpeg4_stuffing(&s->pb);
    1051             : 
    1052             :     /* user data */
    1053         213 :     if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
    1054           0 :         put_bits(&s->pb, 16, 0);
    1055           0 :         put_bits(&s->pb, 16, 0x1B2);    /* user_data */
    1056           0 :         avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
    1057             :     }
    1058             : }
    1059             : 
    1060             : /* write MPEG-4 VOP header */
    1061        2490 : int ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
    1062             : {
    1063             :     uint64_t time_incr;
    1064             :     int64_t time_div, time_mod;
    1065             : 
    1066        2490 :     if (s->pict_type == AV_PICTURE_TYPE_I) {
    1067         255 :         if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
    1068         196 :             if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT)  // HACK, the reference sw is buggy
    1069         196 :                 mpeg4_encode_visual_object_header(s);
    1070         196 :             if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0)  // HACK, the reference sw is buggy
    1071         196 :                 mpeg4_encode_vol_header(s, 0, 0);
    1072             :         }
    1073         255 :         if (!(s->workaround_bugs & FF_BUG_MS))
    1074         255 :             mpeg4_encode_gop_header(s);
    1075             :     }
    1076             : 
    1077        2490 :     s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
    1078             : 
    1079        2490 :     put_bits(&s->pb, 16, 0);                /* vop header */
    1080        2490 :     put_bits(&s->pb, 16, VOP_STARTCODE);    /* vop header */
    1081        2490 :     put_bits(&s->pb, 2, s->pict_type - 1);  /* pict type: I = 0 , P = 1 */
    1082             : 
    1083        2490 :     time_div  = FFUDIV(s->time, s->avctx->time_base.den);
    1084        2490 :     time_mod  = FFUMOD(s->time, s->avctx->time_base.den);
    1085        2490 :     time_incr = time_div - s->last_time_base;
    1086             : 
    1087             :     // This limits the frame duration to max 1 hour
    1088        2490 :     if (time_incr > 3600) {
    1089           0 :         av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
    1090           0 :         return AVERROR(EINVAL);
    1091             :     }
    1092        5061 :     while (time_incr--)
    1093          81 :         put_bits(&s->pb, 1, 1);
    1094             : 
    1095        2490 :     put_bits(&s->pb, 1, 0);
    1096             : 
    1097        2490 :     put_bits(&s->pb, 1, 1);                             /* marker */
    1098        2490 :     put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
    1099        2490 :     put_bits(&s->pb, 1, 1);                             /* marker */
    1100        2490 :     put_bits(&s->pb, 1, 1);                             /* vop coded */
    1101        2490 :     if (s->pict_type == AV_PICTURE_TYPE_P) {
    1102        1595 :         put_bits(&s->pb, 1, s->no_rounding);    /* rounding type */
    1103             :     }
    1104        2490 :     put_bits(&s->pb, 3, 0);     /* intra dc VLC threshold */
    1105        2490 :     if (!s->progressive_sequence) {
    1106           0 :         put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
    1107           0 :         put_bits(&s->pb, 1, s->alternate_scan);
    1108             :     }
    1109             :     // FIXME sprite stuff
    1110             : 
    1111        2490 :     put_bits(&s->pb, 5, s->qscale);
    1112             : 
    1113        2490 :     if (s->pict_type != AV_PICTURE_TYPE_I)
    1114        2235 :         put_bits(&s->pb, 3, s->f_code);  /* fcode_for */
    1115        2490 :     if (s->pict_type == AV_PICTURE_TYPE_B)
    1116         640 :         put_bits(&s->pb, 3, s->b_code);  /* fcode_back */
    1117             : 
    1118        2490 :     return 0;
    1119             : }
    1120             : 
    1121          58 : static av_cold void init_uni_dc_tab(void)
    1122             : {
    1123             :     int level, uni_code, uni_len;
    1124             : 
    1125       29754 :     for (level = -256; level < 256; level++) {
    1126             :         int size, v, l;
    1127             :         /* find number of bits */
    1128       29696 :         size = 0;
    1129       29696 :         v    = abs(level);
    1130      267902 :         while (v) {
    1131      208510 :             v >>= 1;
    1132      208510 :             size++;
    1133             :         }
    1134             : 
    1135       29696 :         if (level < 0)
    1136       14848 :             l = (-level) ^ ((1 << size) - 1);
    1137             :         else
    1138       14848 :             l = level;
    1139             : 
    1140             :         /* luminance */
    1141       29696 :         uni_code = ff_mpeg4_DCtab_lum[size][0];
    1142       29696 :         uni_len  = ff_mpeg4_DCtab_lum[size][1];
    1143             : 
    1144       29696 :         if (size > 0) {
    1145       29638 :             uni_code <<= size;
    1146       29638 :             uni_code  |= l;
    1147       29638 :             uni_len   += size;
    1148       29638 :             if (size > 8) {
    1149          58 :                 uni_code <<= 1;
    1150          58 :                 uni_code  |= 1;
    1151          58 :                 uni_len++;
    1152             :             }
    1153             :         }
    1154       29696 :         uni_DCtab_lum_bits[level + 256] = uni_code;
    1155       29696 :         uni_DCtab_lum_len[level + 256]  = uni_len;
    1156             : 
    1157             :         /* chrominance */
    1158       29696 :         uni_code = ff_mpeg4_DCtab_chrom[size][0];
    1159       29696 :         uni_len  = ff_mpeg4_DCtab_chrom[size][1];
    1160             : 
    1161       29696 :         if (size > 0) {
    1162       29638 :             uni_code <<= size;
    1163       29638 :             uni_code  |= l;
    1164       29638 :             uni_len   += size;
    1165       29638 :             if (size > 8) {
    1166          58 :                 uni_code <<= 1;
    1167          58 :                 uni_code  |= 1;
    1168          58 :                 uni_len++;
    1169             :             }
    1170             :         }
    1171       29696 :         uni_DCtab_chrom_bits[level + 256] = uni_code;
    1172       29696 :         uni_DCtab_chrom_len[level + 256]  = uni_len;
    1173             :     }
    1174          58 : }
    1175             : 
    1176         116 : static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
    1177             :                                           uint8_t *len_tab)
    1178             : {
    1179             :     int slevel, run, last;
    1180             : 
    1181             :     av_assert0(MAX_LEVEL >= 64);
    1182             :     av_assert0(MAX_RUN >= 63);
    1183             : 
    1184       14964 :     for (slevel = -64; slevel < 64; slevel++) {
    1185       14848 :         if (slevel == 0)
    1186         116 :             continue;
    1187      957580 :         for (run = 0; run < 64; run++) {
    1188     2828544 :             for (last = 0; last <= 1; last++) {
    1189     1885696 :                 const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
    1190     1885696 :                 int level       = slevel < 0 ? -slevel : slevel;
    1191     1885696 :                 int sign        = slevel < 0 ? 1 : 0;
    1192             :                 int bits, len, code;
    1193             :                 int level1, run1;
    1194             : 
    1195     1885696 :                 len_tab[index] = 100;
    1196             : 
    1197             :                 /* ESC0 */
    1198     1885696 :                 code = get_rl_index(rl, last, run, level);
    1199     1885696 :                 bits = rl->table_vlc[code][0];
    1200     1885696 :                 len  = rl->table_vlc[code][1];
    1201     1885696 :                 bits = bits * 2 + sign;
    1202     1885696 :                 len++;
    1203             : 
    1204     1885696 :                 if (code != rl->n && len < len_tab[index]) {
    1205       23664 :                     bits_tab[index] = bits;
    1206       23664 :                     len_tab[index]  = len;
    1207             :                 }
    1208             :                 /* ESC1 */
    1209     1885696 :                 bits = rl->table_vlc[rl->n][0];
    1210     1885696 :                 len  = rl->table_vlc[rl->n][1];
    1211     1885696 :                 bits = bits * 2;
    1212     1885696 :                 len++;                 // esc1
    1213     1885696 :                 level1 = level - rl->max_level[last][run];
    1214     1885696 :                 if (level1 > 0) {
    1215     1862032 :                     code   = get_rl_index(rl, last, run, level1);
    1216     1862032 :                     bits <<= rl->table_vlc[code][1];
    1217     1862032 :                     len   += rl->table_vlc[code][1];
    1218     1862032 :                     bits  += rl->table_vlc[code][0];
    1219     1862032 :                     bits   = bits * 2 + sign;
    1220     1862032 :                     len++;
    1221             : 
    1222     1862032 :                     if (code != rl->n && len < len_tab[index]) {
    1223       23664 :                         bits_tab[index] = bits;
    1224       23664 :                         len_tab[index]  = len;
    1225             :                     }
    1226             :                 }
    1227             :                 /* ESC2 */
    1228     1885696 :                 bits = rl->table_vlc[rl->n][0];
    1229     1885696 :                 len  = rl->table_vlc[rl->n][1];
    1230     1885696 :                 bits = bits * 4 + 2;
    1231     1885696 :                 len += 2;                 // esc2
    1232     1885696 :                 run1 = run - rl->max_run[last][level] - 1;
    1233     1885696 :                 if (run1 >= 0) {
    1234     1838368 :                     code   = get_rl_index(rl, last, run1, level);
    1235     1838368 :                     bits <<= rl->table_vlc[code][1];
    1236     1838368 :                     len   += rl->table_vlc[code][1];
    1237     1838368 :                     bits  += rl->table_vlc[code][0];
    1238     1838368 :                     bits   = bits * 2 + sign;
    1239     1838368 :                     len++;
    1240             : 
    1241     1838368 :                     if (code != rl->n && len < len_tab[index]) {
    1242       14384 :                         bits_tab[index] = bits;
    1243       14384 :                         len_tab[index]  = len;
    1244             :                     }
    1245             :                 }
    1246             :                 /* ESC3 */
    1247     1885696 :                 bits = rl->table_vlc[rl->n][0];
    1248     1885696 :                 len  = rl->table_vlc[rl->n][1];
    1249     1885696 :                 bits = bits * 4 + 3;
    1250     1885696 :                 len += 2;                 // esc3
    1251     1885696 :                 bits = bits * 2 + last;
    1252     1885696 :                 len++;
    1253     1885696 :                 bits = bits * 64 + run;
    1254     1885696 :                 len += 6;
    1255     1885696 :                 bits = bits * 2 + 1;
    1256     1885696 :                 len++;                    // marker
    1257     1885696 :                 bits = bits * 4096 + (slevel & 0xfff);
    1258     1885696 :                 len += 12;
    1259     1885696 :                 bits = bits * 2 + 1;
    1260     1885696 :                 len++;                    // marker
    1261             : 
    1262     1885696 :                 if (len < len_tab[index]) {
    1263     1825492 :                     bits_tab[index] = bits;
    1264     1825492 :                     len_tab[index]  = len;
    1265             :                 }
    1266             :             }
    1267             :         }
    1268             :     }
    1269         116 : }
    1270             : 
    1271          58 : static av_cold int encode_init(AVCodecContext *avctx)
    1272             : {
    1273          58 :     MpegEncContext *s = avctx->priv_data;
    1274             :     int ret;
    1275             :     static int done = 0;
    1276             : 
    1277          58 :     if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
    1278           0 :         av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
    1279           0 :         return AVERROR(EINVAL);
    1280             :     }
    1281             : 
    1282          58 :     if ((ret = ff_mpv_encode_init(avctx)) < 0)
    1283           0 :         return ret;
    1284             : 
    1285          58 :     if (!done) {
    1286          58 :         done = 1;
    1287             : 
    1288          58 :         init_uni_dc_tab();
    1289             : 
    1290          58 :         ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
    1291             : 
    1292          58 :         init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
    1293          58 :         init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
    1294             :     }
    1295             : 
    1296          58 :     s->min_qcoeff               = -2048;
    1297          58 :     s->max_qcoeff               = 2047;
    1298          58 :     s->intra_ac_vlc_length      = uni_mpeg4_intra_rl_len;
    1299          58 :     s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
    1300          58 :     s->inter_ac_vlc_length      = uni_mpeg4_inter_rl_len;
    1301          58 :     s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
    1302          58 :     s->luma_dc_vlc_length       = uni_DCtab_lum_len;
    1303          58 :     s->ac_esc_length            = 7 + 2 + 1 + 6 + 1 + 12 + 1;
    1304          58 :     s->y_dc_scale_table         = ff_mpeg4_y_dc_scale_table;
    1305          58 :     s->c_dc_scale_table         = ff_mpeg4_c_dc_scale_table;
    1306             : 
    1307          58 :     if (s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
    1308          17 :         s->avctx->extradata = av_malloc(1024);
    1309          17 :         init_put_bits(&s->pb, s->avctx->extradata, 1024);
    1310             : 
    1311          17 :         if (!(s->workaround_bugs & FF_BUG_MS))
    1312          17 :             mpeg4_encode_visual_object_header(s);
    1313          17 :         mpeg4_encode_vol_header(s, 0, 0);
    1314             : 
    1315             : //            ff_mpeg4_stuffing(&s->pb); ?
    1316          17 :         flush_put_bits(&s->pb);
    1317          17 :         s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
    1318             :     }
    1319          58 :     return 0;
    1320             : }
    1321             : 
    1322        1760 : void ff_mpeg4_init_partitions(MpegEncContext *s)
    1323             : {
    1324        1760 :     uint8_t *start = put_bits_ptr(&s->pb);
    1325        1760 :     uint8_t *end   = s->pb.buf_end;
    1326        1760 :     int size       = end - start;
    1327        1760 :     int pb_size    = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
    1328        1760 :     int tex_size   = (size - 2 * pb_size) & (~3);
    1329             : 
    1330        1760 :     set_put_bits_buffer_size(&s->pb, pb_size);
    1331        1760 :     init_put_bits(&s->tex_pb, start + pb_size, tex_size);
    1332        1760 :     init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
    1333        1760 : }
    1334             : 
    1335        1760 : void ff_mpeg4_merge_partitions(MpegEncContext *s)
    1336             : {
    1337        1760 :     const int pb2_len    = put_bits_count(&s->pb2);
    1338        1760 :     const int tex_pb_len = put_bits_count(&s->tex_pb);
    1339        1760 :     const int bits       = put_bits_count(&s->pb);
    1340             : 
    1341        1760 :     if (s->pict_type == AV_PICTURE_TYPE_I) {
    1342         512 :         put_bits(&s->pb, 19, DC_MARKER);
    1343         512 :         s->misc_bits  += 19 + pb2_len + bits - s->last_bits;
    1344         512 :         s->i_tex_bits += tex_pb_len;
    1345             :     } else {
    1346        1248 :         put_bits(&s->pb, 17, MOTION_MARKER);
    1347        1248 :         s->misc_bits  += 17 + pb2_len;
    1348        1248 :         s->mv_bits    += bits - s->last_bits;
    1349        1248 :         s->p_tex_bits += tex_pb_len;
    1350             :     }
    1351             : 
    1352        1760 :     flush_put_bits(&s->pb2);
    1353        1760 :     flush_put_bits(&s->tex_pb);
    1354             : 
    1355        1760 :     set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
    1356        1760 :     avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
    1357        1760 :     avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
    1358        1760 :     s->last_bits = put_bits_count(&s->pb);
    1359        1760 : }
    1360             : 
    1361        3323 : void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
    1362             : {
    1363        3323 :     int mb_num_bits = av_log2(s->mb_num - 1) + 1;
    1364             : 
    1365        3323 :     put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
    1366        3323 :     put_bits(&s->pb, 1, 1);
    1367             : 
    1368        3323 :     put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
    1369        3323 :     put_bits(&s->pb, s->quant_precision, s->qscale);
    1370        3323 :     put_bits(&s->pb, 1, 0); /* no HEC */
    1371        3323 : }
    1372             : 
    1373             : #define OFFSET(x) offsetof(MpegEncContext, x)
    1374             : #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
    1375             : static const AVOption options[] = {
    1376             :     { "data_partitioning", "Use data partitioning.",      OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
    1377             :     { "alternate_scan",    "Enable alternate scantable.", OFFSET(alternate_scan),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
    1378             :     FF_MPV_COMMON_OPTS
    1379             :     { NULL },
    1380             : };
    1381             : 
    1382             : static const AVClass mpeg4enc_class = {
    1383             :     .class_name = "MPEG4 encoder",
    1384             :     .item_name  = av_default_item_name,
    1385             :     .option     = options,
    1386             :     .version    = LIBAVUTIL_VERSION_INT,
    1387             : };
    1388             : 
    1389             : AVCodec ff_mpeg4_encoder = {
    1390             :     .name           = "mpeg4",
    1391             :     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
    1392             :     .type           = AVMEDIA_TYPE_VIDEO,
    1393             :     .id             = AV_CODEC_ID_MPEG4,
    1394             :     .priv_data_size = sizeof(MpegEncContext),
    1395             :     .init           = encode_init,
    1396             :     .encode2        = ff_mpv_encode_picture,
    1397             :     .close          = ff_mpv_encode_end,
    1398             :     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    1399             :     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
    1400             :     .priv_class     = &mpeg4enc_class,
    1401             : };

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