yading@10: /*
yading@10:  * MPEG4 encoder.
yading@10:  * Copyright (c) 2000,2001 Fabrice Bellard
yading@10:  * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavutil/log.h"
yading@10: #include "libavutil/opt.h"
yading@10: #include "mpegvideo.h"
yading@10: #include "h263.h"
yading@10: #include "mpeg4video.h"
yading@10: 
yading@10: //The uni_DCtab_* tables below contain unified bits+length tables to encode DC
yading@10: //differences in mpeg4. Unified in the sense that the specification specifies
yading@10: //this encoding in several steps.
yading@10: static uint8_t uni_DCtab_lum_len[512];
yading@10: static uint8_t uni_DCtab_chrom_len[512];
yading@10: static uint16_t uni_DCtab_lum_bits[512];
yading@10: static uint16_t uni_DCtab_chrom_bits[512];
yading@10: 
yading@10: //unified encoding tables for run length encoding of coefficients
yading@10: //unified in the sense that the specification specifies the encoding in several steps.
yading@10: static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
yading@10: static uint8_t  uni_mpeg4_intra_rl_len [64*64*2*2];
yading@10: static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
yading@10: static uint8_t  uni_mpeg4_inter_rl_len [64*64*2*2];
yading@10: //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
yading@10: //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
yading@10: #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
yading@10: 
yading@10: /* mpeg4
yading@10: inter
yading@10: max level: 24/6
yading@10: max run: 53/63
yading@10: 
yading@10: intra
yading@10: max level: 53/16
yading@10: max run: 29/41
yading@10: */
yading@10: 
yading@10: 
yading@10: /**
yading@10:  * Return the number of bits that encoding the 8x8 block in block would need.
yading@10:  * @param[in]  block_last_index last index in scantable order that refers to a non zero element in block.
yading@10:  */
yading@10: static inline int get_block_rate(MpegEncContext * s, int16_t block[64], int block_last_index, uint8_t scantable[64]){
yading@10:     int last=0;
yading@10:     int j;
yading@10:     int rate=0;
yading@10: 
yading@10:     for(j=1; j<=block_last_index; j++){
yading@10:         const int index= scantable[j];
yading@10:         int level= block[index];
yading@10:         if(level){
yading@10:             level+= 64;
yading@10:             if((level&(~127)) == 0){
yading@10:                 if(j<block_last_index) rate+= s->intra_ac_vlc_length     [UNI_AC_ENC_INDEX(j-last-1, level)];
yading@10:                 else                   rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
yading@10:             }else
yading@10:                 rate += s->ac_esc_length;
yading@10: 
yading@10:             last= j;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     return rate;
yading@10: }
yading@10: 
yading@10: 
yading@10: /**
yading@10:  * Restore the ac coefficients in block that have been changed by decide_ac_pred().
yading@10:  * This function also restores s->block_last_index.
yading@10:  * @param[in,out] block MB coefficients, these will be restored
yading@10:  * @param[in] dir ac prediction direction for each 8x8 block
yading@10:  * @param[out] st scantable for each 8x8 block
yading@10:  * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
yading@10:  */
yading@10: static inline void restore_ac_coeffs(MpegEncContext * s, int16_t block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
yading@10: {
yading@10:     int i, n;
yading@10:     memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
yading@10: 
yading@10:     for(n=0; n<6; n++){
yading@10:         int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
yading@10: 
yading@10:         st[n]= s->intra_scantable.permutated;
yading@10:         if(dir[n]){
yading@10:             /* top prediction */
yading@10:             for(i=1; i<8; i++){
yading@10:                 block[n][s->dsp.idct_permutation[i   ]] = ac_val[i+8];
yading@10:             }
yading@10:         }else{
yading@10:             /* left prediction */
yading@10:             for(i=1; i<8; i++){
yading@10:                 block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i  ];
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
yading@10:  * This function will also update s->block_last_index and s->ac_val.
yading@10:  * @param[in,out] block MB coefficients, these will be updated if 1 is returned
yading@10:  * @param[in] dir ac prediction direction for each 8x8 block
yading@10:  * @param[out] st scantable for each 8x8 block
yading@10:  * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
yading@10:  */
yading@10: static inline int decide_ac_pred(MpegEncContext * s, int16_t block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
yading@10: {
yading@10:     int score= 0;
yading@10:     int i, n;
yading@10:     int8_t * const qscale_table = s->current_picture.qscale_table;
yading@10: 
yading@10:     memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
yading@10: 
yading@10:     for(n=0; n<6; n++){
yading@10:         int16_t *ac_val, *ac_val1;
yading@10: 
yading@10:         score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
yading@10: 
yading@10:         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
yading@10:         ac_val1= ac_val;
yading@10:         if(dir[n]){
yading@10:             const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
yading@10:             /* top prediction */
yading@10:             ac_val-= s->block_wrap[n]*16;
yading@10:             if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
yading@10:                 /* same qscale */
yading@10:                 for(i=1; i<8; i++){
yading@10:                     const int level= block[n][s->dsp.idct_permutation[i   ]];
yading@10:                     block[n][s->dsp.idct_permutation[i   ]] = level - ac_val[i+8];
yading@10:                     ac_val1[i  ]=    block[n][s->dsp.idct_permutation[i<<3]];
yading@10:                     ac_val1[i+8]= level;
yading@10:                 }
yading@10:             }else{
yading@10:                 /* different qscale, we must rescale */
yading@10:                 for(i=1; i<8; i++){
yading@10:                     const int level= block[n][s->dsp.idct_permutation[i   ]];
yading@10:                     block[n][s->dsp.idct_permutation[i   ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
yading@10:                     ac_val1[i  ]=    block[n][s->dsp.idct_permutation[i<<3]];
yading@10:                     ac_val1[i+8]= level;
yading@10:                 }
yading@10:             }
yading@10:             st[n]= s->intra_h_scantable.permutated;
yading@10:         }else{
yading@10:             const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
yading@10:             /* left prediction */
yading@10:             ac_val-= 16;
yading@10:             if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
yading@10:                 /* same qscale */
yading@10:                 for(i=1; i<8; i++){
yading@10:                     const int level= block[n][s->dsp.idct_permutation[i<<3]];
yading@10:                     block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
yading@10:                     ac_val1[i  ]= level;
yading@10:                     ac_val1[i+8]=    block[n][s->dsp.idct_permutation[i   ]];
yading@10:                 }
yading@10:             }else{
yading@10:                 /* different qscale, we must rescale */
yading@10:                 for(i=1; i<8; i++){
yading@10:                     const int level= block[n][s->dsp.idct_permutation[i<<3]];
yading@10:                     block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
yading@10:                     ac_val1[i  ]= level;
yading@10:                     ac_val1[i+8]=    block[n][s->dsp.idct_permutation[i   ]];
yading@10:                 }
yading@10:             }
yading@10:             st[n]= s->intra_v_scantable.permutated;
yading@10:         }
yading@10: 
yading@10:         for(i=63; i>0; i--) //FIXME optimize
yading@10:             if(block[n][ st[n][i] ]) break;
yading@10:         s->block_last_index[n]= i;
yading@10: 
yading@10:         score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
yading@10:     }
yading@10: 
yading@10:     if(score < 0){
yading@10:         return 1;
yading@10:     }else{
yading@10:         restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
yading@10:         return 0;
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * modify mb_type & qscale so that encoding is actually possible in mpeg4
yading@10:  */
yading@10: void ff_clean_mpeg4_qscales(MpegEncContext *s){
yading@10:     int i;
yading@10:     int8_t * const qscale_table = s->current_picture.qscale_table;
yading@10: 
yading@10:     ff_clean_h263_qscales(s);
yading@10: 
yading@10:     if(s->pict_type== AV_PICTURE_TYPE_B){
yading@10:         int odd=0;
yading@10:         /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
yading@10: 
yading@10:         for(i=0; i<s->mb_num; i++){
yading@10:             int mb_xy= s->mb_index2xy[i];
yading@10:             odd += qscale_table[mb_xy]&1;
yading@10:         }
yading@10: 
yading@10:         if(2*odd > s->mb_num) odd=1;
yading@10:         else                  odd=0;
yading@10: 
yading@10:         for(i=0; i<s->mb_num; i++){
yading@10:             int mb_xy= s->mb_index2xy[i];
yading@10:             if((qscale_table[mb_xy]&1) != odd)
yading@10:                 qscale_table[mb_xy]++;
yading@10:             if(qscale_table[mb_xy] > 31)
yading@10:                 qscale_table[mb_xy]= 31;
yading@10:         }
yading@10: 
yading@10:         for(i=1; i<s->mb_num; i++){
yading@10:             int mb_xy= s->mb_index2xy[i];
yading@10:             if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
yading@10:                 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: 
yading@10: /**
yading@10:  * Encode the dc value.
yading@10:  * @param n block index (0-3 are luma, 4-5 are chroma)
yading@10:  */
yading@10: static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
yading@10: {
yading@10: #if 1
yading@10:     /* DC will overflow if level is outside the [-255,255] range. */
yading@10:     level+=256;
yading@10:     if (n < 4) {
yading@10:         /* luminance */
yading@10:         put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
yading@10:     } else {
yading@10:         /* chrominance */
yading@10:         put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
yading@10:     }
yading@10: #else
yading@10:     int size, v;
yading@10:     /* find number of bits */
yading@10:     size = 0;
yading@10:     v = abs(level);
yading@10:     while (v) {
yading@10:         v >>= 1;
yading@10:         size++;
yading@10:     }
yading@10: 
yading@10:     if (n < 4) {
yading@10:         /* luminance */
yading@10:         put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
yading@10:     } else {
yading@10:         /* chrominance */
yading@10:         put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
yading@10:     }
yading@10: 
yading@10:     /* encode remaining bits */
yading@10:     if (size > 0) {
yading@10:         if (level < 0)
yading@10:             level = (-level) ^ ((1 << size) - 1);
yading@10:         put_bits(&s->pb, size, level);
yading@10:         if (size > 8)
yading@10:             put_bits(&s->pb, 1, 1);
yading@10:     }
yading@10: #endif
yading@10: }
yading@10: 
yading@10: static inline int mpeg4_get_dc_length(int level, int n){
yading@10:     if (n < 4) {
yading@10:         return uni_DCtab_lum_len[level + 256];
yading@10:     } else {
yading@10:         return uni_DCtab_chrom_len[level + 256];
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Encode an 8x8 block.
yading@10:  * @param n block index (0-3 are luma, 4-5 are chroma)
yading@10:  */
yading@10: static inline void mpeg4_encode_block(MpegEncContext * s, int16_t * block, int n, int intra_dc,
yading@10:                                uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
yading@10: {
yading@10:     int i, last_non_zero;
yading@10:     uint32_t *bits_tab;
yading@10:     uint8_t *len_tab;
yading@10:     const int last_index = s->block_last_index[n];
yading@10: 
yading@10:     if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
yading@10:         /* mpeg4 based DC predictor */
yading@10:         mpeg4_encode_dc(dc_pb, intra_dc, n);
yading@10:         if(last_index<1) return;
yading@10:         i = 1;
yading@10:         bits_tab= uni_mpeg4_intra_rl_bits;
yading@10:         len_tab = uni_mpeg4_intra_rl_len;
yading@10:     } else {
yading@10:         if(last_index<0) return;
yading@10:         i = 0;
yading@10:         bits_tab= uni_mpeg4_inter_rl_bits;
yading@10:         len_tab = uni_mpeg4_inter_rl_len;
yading@10:     }
yading@10: 
yading@10:     /* AC coefs */
yading@10:     last_non_zero = i - 1;
yading@10:     for (; i < last_index; i++) {
yading@10:         int level = block[ scan_table[i] ];
yading@10:         if (level) {
yading@10:             int run = i - last_non_zero - 1;
yading@10:             level+=64;
yading@10:             if((level&(~127)) == 0){
yading@10:                 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
yading@10:                 put_bits(ac_pb, len_tab[index], bits_tab[index]);
yading@10:             }else{ //ESC3
yading@10:                 put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
yading@10:             }
yading@10:             last_non_zero = i;
yading@10:         }
yading@10:     }
yading@10:     /*if(i<=last_index)*/{
yading@10:         int level = block[ scan_table[i] ];
yading@10:         int run = i - last_non_zero - 1;
yading@10:         level+=64;
yading@10:         if((level&(~127)) == 0){
yading@10:             const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
yading@10:             put_bits(ac_pb, len_tab[index], bits_tab[index]);
yading@10:         }else{ //ESC3
yading@10:             put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int mpeg4_get_block_length(MpegEncContext * s, int16_t * block, int n, int intra_dc,
yading@10:                                uint8_t *scan_table)
yading@10: {
yading@10:     int i, last_non_zero;
yading@10:     uint8_t *len_tab;
yading@10:     const int last_index = s->block_last_index[n];
yading@10:     int len=0;
yading@10: 
yading@10:     if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
yading@10:         /* mpeg4 based DC predictor */
yading@10:         len += mpeg4_get_dc_length(intra_dc, n);
yading@10:         if(last_index<1) return len;
yading@10:         i = 1;
yading@10:         len_tab = uni_mpeg4_intra_rl_len;
yading@10:     } else {
yading@10:         if(last_index<0) return 0;
yading@10:         i = 0;
yading@10:         len_tab = uni_mpeg4_inter_rl_len;
yading@10:     }
yading@10: 
yading@10:     /* AC coefs */
yading@10:     last_non_zero = i - 1;
yading@10:     for (; i < last_index; i++) {
yading@10:         int level = block[ scan_table[i] ];
yading@10:         if (level) {
yading@10:             int run = i - last_non_zero - 1;
yading@10:             level+=64;
yading@10:             if((level&(~127)) == 0){
yading@10:                 const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
yading@10:                 len += len_tab[index];
yading@10:             }else{ //ESC3
yading@10:                 len += 7+2+1+6+1+12+1;
yading@10:             }
yading@10:             last_non_zero = i;
yading@10:         }
yading@10:     }
yading@10:     /*if(i<=last_index)*/{
yading@10:         int level = block[ scan_table[i] ];
yading@10:         int run = i - last_non_zero - 1;
yading@10:         level+=64;
yading@10:         if((level&(~127)) == 0){
yading@10:             const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
yading@10:             len += len_tab[index];
yading@10:         }else{ //ESC3
yading@10:             len += 7+2+1+6+1+12+1;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     return len;
yading@10: }
yading@10: 
yading@10: static inline void mpeg4_encode_blocks(MpegEncContext * s, int16_t block[6][64], int intra_dc[6],
yading@10:                                uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
yading@10:     int i;
yading@10: 
yading@10:     if(scan_table){
yading@10:         if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
yading@10:             for (i = 0; i < 6; i++) {
yading@10:                 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
yading@10:             }
yading@10:         }else{
yading@10:             /* encode each block */
yading@10:             for (i = 0; i < 6; i++) {
yading@10:                 mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
yading@10:             }
yading@10:         }
yading@10:     }else{
yading@10:         if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
yading@10:             for (i = 0; i < 6; i++) {
yading@10:                 skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
yading@10:             }
yading@10:         }else{
yading@10:             /* encode each block */
yading@10:             for (i = 0; i < 6; i++) {
yading@10:                 mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static inline int get_b_cbp(MpegEncContext * s, int16_t block[6][64],
yading@10:                             int motion_x, int motion_y, int mb_type)
yading@10: {
yading@10:     int cbp = 0, i;
yading@10: 
yading@10:     if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
yading@10:         int score = 0;
yading@10:         const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
yading@10: 
yading@10:         for (i = 0; i < 6; i++)
yading@10:             if (s->coded_score[i] < 0) {
yading@10:                 score += s->coded_score[i];
yading@10:                 cbp   |= 1 << (5 - i);
yading@10:             }
yading@10: 
yading@10:         if (cbp) {
yading@10:             int zero_score = -6;
yading@10:             if ((motion_x | motion_y | s->dquant | mb_type) == 0)
yading@10:                 zero_score -= 4; //2*MV + mb_type + cbp bit
yading@10: 
yading@10:             zero_score *= lambda;
yading@10:             if (zero_score <= score)
yading@10:                 cbp = 0;
yading@10:         }
yading@10: 
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
yading@10:                 s->block_last_index[i] = -1;
yading@10:                 s->dsp.clear_block(s->block[i]);
yading@10:             }
yading@10:         }
yading@10:     } else {
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 0)
yading@10:                 cbp |= 1 << (5 - i);
yading@10:         }
yading@10:     }
yading@10:     return cbp;
yading@10: }
yading@10: 
yading@10: //FIXME this is duplicated to h263.c
yading@10: static const int dquant_code[5]= {1,0,9,2,3};
yading@10: 
yading@10: void ff_mpeg4_encode_mb(MpegEncContext * s,
yading@10:                         int16_t block[6][64],
yading@10:                         int motion_x, int motion_y)
yading@10: {
yading@10:     int cbpc, cbpy, pred_x, pred_y;
yading@10:     PutBitContext * const pb2    = s->data_partitioning                         ? &s->pb2    : &s->pb;
yading@10:     PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
yading@10:     PutBitContext * const dc_pb  = s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_I ? &s->pb2    : &s->pb;
yading@10:     const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
yading@10: 
yading@10:     if (!s->mb_intra) {
yading@10:         int i, cbp;
yading@10: 
yading@10:         if(s->pict_type==AV_PICTURE_TYPE_B){
yading@10:             static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
yading@10:             int mb_type=  mb_type_table[s->mv_dir];
yading@10: 
yading@10:             if(s->mb_x==0){
yading@10:                 for(i=0; i<2; i++){
yading@10:                     s->last_mv[i][0][0]=
yading@10:                     s->last_mv[i][0][1]=
yading@10:                     s->last_mv[i][1][0]=
yading@10:                     s->last_mv[i][1][1]= 0;
yading@10:                 }
yading@10:             }
yading@10: 
yading@10:             av_assert2(s->dquant>=-2 && s->dquant<=2);
yading@10:             av_assert2((s->dquant&1)==0);
yading@10:             av_assert2(mb_type>=0);
yading@10: 
yading@10:             /* nothing to do if this MB was skipped in the next P Frame */
yading@10:             if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { //FIXME avoid DCT & ...
yading@10:                 s->skip_count++;
yading@10:                 s->mv[0][0][0]=
yading@10:                 s->mv[0][0][1]=
yading@10:                 s->mv[1][0][0]=
yading@10:                 s->mv[1][0][1]= 0;
yading@10:                 s->mv_dir= MV_DIR_FORWARD; //doesn't matter
yading@10:                 s->qscale -= s->dquant;
yading@10: //                s->mb_skipped=1;
yading@10: 
yading@10:                 return;
yading@10:             }
yading@10: 
yading@10:             cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
yading@10: 
yading@10:             if ((cbp | motion_x | motion_y | mb_type) ==0) {
yading@10:                 /* direct MB with MV={0,0} */
yading@10:                 av_assert2(s->dquant==0);
yading@10: 
yading@10:                 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
yading@10: 
yading@10:                 if(interleaved_stats){
yading@10:                     s->misc_bits++;
yading@10:                     s->last_bits++;
yading@10:                 }
yading@10:                 s->skip_count++;
yading@10:                 return;
yading@10:             }
yading@10: 
yading@10:             put_bits(&s->pb, 1, 0);     /* mb coded modb1=0 */
yading@10:             put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
yading@10:             put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
yading@10:             if(cbp) put_bits(&s->pb, 6, cbp);
yading@10: 
yading@10:             if(cbp && mb_type){
yading@10:                 if(s->dquant)
yading@10:                     put_bits(&s->pb, 2, (s->dquant>>2)+3);
yading@10:                 else
yading@10:                     put_bits(&s->pb, 1, 0);
yading@10:             }else
yading@10:                 s->qscale -= s->dquant;
yading@10: 
yading@10:             if(!s->progressive_sequence){
yading@10:                 if(cbp)
yading@10:                     put_bits(&s->pb, 1, s->interlaced_dct);
yading@10:                 if(mb_type) // not direct mode
yading@10:                     put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
yading@10:             }
yading@10: 
yading@10:             if(interleaved_stats){
yading@10:                 s->misc_bits+= get_bits_diff(s);
yading@10:             }
yading@10: 
yading@10:             if(mb_type == 0){
yading@10:                 av_assert2(s->mv_dir & MV_DIRECT);
yading@10:                 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
yading@10:                 s->b_count++;
yading@10:                 s->f_count++;
yading@10:             }else{
yading@10:                 av_assert2(mb_type > 0 && mb_type < 4);
yading@10:                 if(s->mv_type != MV_TYPE_FIELD){
yading@10:                     if(s->mv_dir & MV_DIR_FORWARD){
yading@10:                         ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
yading@10:                                                         s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
yading@10:                         s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
yading@10:                         s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
yading@10:                         s->f_count++;
yading@10:                     }
yading@10:                     if(s->mv_dir & MV_DIR_BACKWARD){
yading@10:                         ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
yading@10:                                                         s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
yading@10:                         s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
yading@10:                         s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
yading@10:                         s->b_count++;
yading@10:                     }
yading@10:                 }else{
yading@10:                     if(s->mv_dir & MV_DIR_FORWARD){
yading@10:                         put_bits(&s->pb, 1, s->field_select[0][0]);
yading@10:                         put_bits(&s->pb, 1, s->field_select[0][1]);
yading@10:                     }
yading@10:                     if(s->mv_dir & MV_DIR_BACKWARD){
yading@10:                         put_bits(&s->pb, 1, s->field_select[1][0]);
yading@10:                         put_bits(&s->pb, 1, s->field_select[1][1]);
yading@10:                     }
yading@10:                     if(s->mv_dir & MV_DIR_FORWARD){
yading@10:                         for(i=0; i<2; i++){
yading@10:                             ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0]  ,
yading@10:                                                             s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
yading@10:                             s->last_mv[0][i][0]= s->mv[0][i][0];
yading@10:                             s->last_mv[0][i][1]= s->mv[0][i][1]*2;
yading@10:                         }
yading@10:                         s->f_count++;
yading@10:                     }
yading@10:                     if(s->mv_dir & MV_DIR_BACKWARD){
yading@10:                         for(i=0; i<2; i++){
yading@10:                             ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0]  ,
yading@10:                                                             s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
yading@10:                             s->last_mv[1][i][0]= s->mv[1][i][0];
yading@10:                             s->last_mv[1][i][1]= s->mv[1][i][1]*2;
yading@10:                         }
yading@10:                         s->b_count++;
yading@10:                     }
yading@10:                 }
yading@10:             }
yading@10: 
yading@10:             if(interleaved_stats){
yading@10:                 s->mv_bits+= get_bits_diff(s);
yading@10:             }
yading@10: 
yading@10:             mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
yading@10: 
yading@10:             if(interleaved_stats){
yading@10:                 s->p_tex_bits+= get_bits_diff(s);
yading@10:             }
yading@10: 
yading@10:         }else{ /* s->pict_type==AV_PICTURE_TYPE_B */
yading@10:             cbp= get_p_cbp(s, block, motion_x, motion_y);
yading@10: 
yading@10:             if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
yading@10:                 /* check if the B frames can skip it too, as we must skip it if we skip here
yading@10:                    why didn't they just compress the skip-mb bits instead of reusing them ?! */
yading@10:                 if(s->max_b_frames>0){
yading@10:                     int i;
yading@10:                     int x,y, offset;
yading@10:                     uint8_t *p_pic;
yading@10: 
yading@10:                     x= s->mb_x*16;
yading@10:                     y= s->mb_y*16;
yading@10: 
yading@10:                     offset= x + y*s->linesize;
yading@10:                     p_pic = s->new_picture.f.data[0] + offset;
yading@10: 
yading@10:                     s->mb_skipped=1;
yading@10:                     for(i=0; i<s->max_b_frames; i++){
yading@10:                         uint8_t *b_pic;
yading@10:                         int diff;
yading@10:                         Picture *pic= s->reordered_input_picture[i+1];
yading@10: 
yading@10:                         if (pic == NULL || pic->f.pict_type != AV_PICTURE_TYPE_B)
yading@10:                             break;
yading@10: 
yading@10:                         b_pic = pic->f.data[0] + offset;
yading@10:                         if (!pic->shared)
yading@10:                             b_pic+= INPLACE_OFFSET;
yading@10: 
yading@10:                         if(x+16 > s->width || y+16 > s->height){
yading@10:                             int x1,y1;
yading@10:                             int xe= FFMIN(16, s->width - x);
yading@10:                             int ye= FFMIN(16, s->height- y);
yading@10:                             diff=0;
yading@10:                             for(y1=0; y1<ye; y1++){
yading@10:                                 for(x1=0; x1<xe; x1++){
yading@10:                                     diff+= FFABS(p_pic[x1+y1*s->linesize] - b_pic[x1+y1*s->linesize]);
yading@10:                                 }
yading@10:                             }
yading@10:                             diff= diff*256/(xe*ye);
yading@10:                         }else{
yading@10:                             diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
yading@10:                         }
yading@10:                         if(diff>s->qscale*70){ //FIXME check that 70 is optimal
yading@10:                             s->mb_skipped=0;
yading@10:                             break;
yading@10:                         }
yading@10:                     }
yading@10:                 }else
yading@10:                     s->mb_skipped=1;
yading@10: 
yading@10:                 if(s->mb_skipped==1){
yading@10:                     /* skip macroblock */
yading@10:                     put_bits(&s->pb, 1, 1);
yading@10: 
yading@10:                     if(interleaved_stats){
yading@10:                         s->misc_bits++;
yading@10:                         s->last_bits++;
yading@10:                     }
yading@10:                     s->skip_count++;
yading@10: 
yading@10:                     return;
yading@10:                 }
yading@10:             }
yading@10: 
yading@10:             put_bits(&s->pb, 1, 0);     /* mb coded */
yading@10:             cbpc = cbp & 3;
yading@10:             cbpy = cbp >> 2;
yading@10:             cbpy ^= 0xf;
yading@10:             if(s->mv_type==MV_TYPE_16X16){
yading@10:                 if(s->dquant) cbpc+= 8;
yading@10:                 put_bits(&s->pb,
yading@10:                         ff_h263_inter_MCBPC_bits[cbpc],
yading@10:                         ff_h263_inter_MCBPC_code[cbpc]);
yading@10: 
yading@10:                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
yading@10:                 if(s->dquant)
yading@10:                     put_bits(pb2, 2, dquant_code[s->dquant+2]);
yading@10: 
yading@10:                 if(!s->progressive_sequence){
yading@10:                     if(cbp)
yading@10:                         put_bits(pb2, 1, s->interlaced_dct);
yading@10:                     put_bits(pb2, 1, 0);
yading@10:                 }
yading@10: 
yading@10:                 if(interleaved_stats){
yading@10:                     s->misc_bits+= get_bits_diff(s);
yading@10:                 }
yading@10: 
yading@10:                 /* motion vectors: 16x16 mode */
yading@10:                 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
yading@10: 
yading@10:                 ff_h263_encode_motion_vector(s, motion_x - pred_x,
yading@10:                                                 motion_y - pred_y, s->f_code);
yading@10:             }else if(s->mv_type==MV_TYPE_FIELD){
yading@10:                 if(s->dquant) cbpc+= 8;
yading@10:                 put_bits(&s->pb,
yading@10:                         ff_h263_inter_MCBPC_bits[cbpc],
yading@10:                         ff_h263_inter_MCBPC_code[cbpc]);
yading@10: 
yading@10:                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
yading@10:                 if(s->dquant)
yading@10:                     put_bits(pb2, 2, dquant_code[s->dquant+2]);
yading@10: 
yading@10:                 av_assert2(!s->progressive_sequence);
yading@10:                 if(cbp)
yading@10:                     put_bits(pb2, 1, s->interlaced_dct);
yading@10:                 put_bits(pb2, 1, 1);
yading@10: 
yading@10:                 if(interleaved_stats){
yading@10:                     s->misc_bits+= get_bits_diff(s);
yading@10:                 }
yading@10: 
yading@10:                 /* motion vectors: 16x8 interlaced mode */
yading@10:                 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
yading@10:                 pred_y /=2;
yading@10: 
yading@10:                 put_bits(&s->pb, 1, s->field_select[0][0]);
yading@10:                 put_bits(&s->pb, 1, s->field_select[0][1]);
yading@10: 
yading@10:                 ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
yading@10:                                                 s->mv[0][0][1] - pred_y, s->f_code);
yading@10:                 ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
yading@10:                                                 s->mv[0][1][1] - pred_y, s->f_code);
yading@10:             }else{
yading@10:                 av_assert2(s->mv_type==MV_TYPE_8X8);
yading@10:                 put_bits(&s->pb,
yading@10:                         ff_h263_inter_MCBPC_bits[cbpc+16],
yading@10:                         ff_h263_inter_MCBPC_code[cbpc+16]);
yading@10:                 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
yading@10: 
yading@10:                 if(!s->progressive_sequence){
yading@10:                     if(cbp)
yading@10:                         put_bits(pb2, 1, s->interlaced_dct);
yading@10:                 }
yading@10: 
yading@10:                 if(interleaved_stats){
yading@10:                     s->misc_bits+= get_bits_diff(s);
yading@10:                 }
yading@10: 
yading@10:                 for(i=0; i<4; i++){
yading@10:                     /* motion vectors: 8x8 mode*/
yading@10:                     ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
yading@10: 
yading@10:                     ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
yading@10:                                                     s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
yading@10:                 }
yading@10:             }
yading@10: 
yading@10:             if(interleaved_stats){
yading@10:                 s->mv_bits+= get_bits_diff(s);
yading@10:             }
yading@10: 
yading@10:             mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
yading@10: 
yading@10:             if(interleaved_stats){
yading@10:                 s->p_tex_bits+= get_bits_diff(s);
yading@10:             }
yading@10:             s->f_count++;
yading@10:         }
yading@10:     } else {
yading@10:         int cbp;
yading@10:         int dc_diff[6];   //dc values with the dc prediction subtracted
yading@10:         int dir[6];  //prediction direction
yading@10:         int zigzag_last_index[6];
yading@10:         uint8_t *scan_table[6];
yading@10:         int i;
yading@10: 
yading@10:         for(i=0; i<6; i++){
yading@10:             dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
yading@10:         }
yading@10: 
yading@10:         if(s->flags & CODEC_FLAG_AC_PRED){
yading@10:             s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
yading@10:         }else{
yading@10:             for(i=0; i<6; i++)
yading@10:                 scan_table[i]= s->intra_scantable.permutated;
yading@10:         }
yading@10: 
yading@10:         /* compute cbp */
yading@10:         cbp = 0;
yading@10:         for (i = 0; i < 6; i++) {
yading@10:             if (s->block_last_index[i] >= 1)
yading@10:                 cbp |= 1 << (5 - i);
yading@10:         }
yading@10: 
yading@10:         cbpc = cbp & 3;
yading@10:         if (s->pict_type == AV_PICTURE_TYPE_I) {
yading@10:             if(s->dquant) cbpc+=4;
yading@10:             put_bits(&s->pb,
yading@10:                 ff_h263_intra_MCBPC_bits[cbpc],
yading@10:                 ff_h263_intra_MCBPC_code[cbpc]);
yading@10:         } else {
yading@10:             if(s->dquant) cbpc+=8;
yading@10:             put_bits(&s->pb, 1, 0);     /* mb coded */
yading@10:             put_bits(&s->pb,
yading@10:                 ff_h263_inter_MCBPC_bits[cbpc + 4],
yading@10:                 ff_h263_inter_MCBPC_code[cbpc + 4]);
yading@10:         }
yading@10:         put_bits(pb2, 1, s->ac_pred);
yading@10:         cbpy = cbp >> 2;
yading@10:         put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
yading@10:         if(s->dquant)
yading@10:             put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
yading@10: 
yading@10:         if(!s->progressive_sequence){
yading@10:             put_bits(dc_pb, 1, s->interlaced_dct);
yading@10:         }
yading@10: 
yading@10:         if(interleaved_stats){
yading@10:             s->misc_bits+= get_bits_diff(s);
yading@10:         }
yading@10: 
yading@10:         mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
yading@10: 
yading@10:         if(interleaved_stats){
yading@10:             s->i_tex_bits+= get_bits_diff(s);
yading@10:         }
yading@10:         s->i_count++;
yading@10: 
yading@10:         /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
yading@10:         if(s->ac_pred)
yading@10:             restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * add mpeg4 stuffing bits (01...1)
yading@10:  */
yading@10: void ff_mpeg4_stuffing(PutBitContext * pbc)
yading@10: {
yading@10:     int length;
yading@10:     put_bits(pbc, 1, 0);
yading@10:     length= (-put_bits_count(pbc))&7;
yading@10:     if(length) put_bits(pbc, length, (1<<length)-1);
yading@10: }
yading@10: 
yading@10: /* must be called before writing the header */
yading@10: void ff_set_mpeg4_time(MpegEncContext * s){
yading@10:     if(s->pict_type==AV_PICTURE_TYPE_B){
yading@10:         ff_mpeg4_init_direct_mv(s);
yading@10:     }else{
yading@10:         s->last_time_base= s->time_base;
yading@10:         s->time_base= FFUDIV(s->time, s->avctx->time_base.den);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void mpeg4_encode_gop_header(MpegEncContext * s){
yading@10:     int hours, minutes, seconds;
yading@10:     int64_t time;
yading@10: 
yading@10:     put_bits(&s->pb, 16, 0);
yading@10:     put_bits(&s->pb, 16, GOP_STARTCODE);
yading@10: 
yading@10:     time = s->current_picture_ptr->f.pts;
yading@10:     if(s->reordered_input_picture[1])
yading@10:         time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
yading@10:     time= time*s->avctx->time_base.num;
yading@10:     s->last_time_base= FFUDIV(time, s->avctx->time_base.den);
yading@10: 
yading@10:     seconds= FFUDIV(time, s->avctx->time_base.den);
yading@10:     minutes= FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
yading@10:     hours  = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
yading@10:     hours  = FFUMOD(hours  , 24);
yading@10: 
yading@10:     put_bits(&s->pb, 5, hours);
yading@10:     put_bits(&s->pb, 6, minutes);
yading@10:     put_bits(&s->pb, 1, 1);
yading@10:     put_bits(&s->pb, 6, seconds);
yading@10: 
yading@10:     put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
yading@10:     put_bits(&s->pb, 1, 0); //broken link == NO
yading@10: 
yading@10:     ff_mpeg4_stuffing(&s->pb);
yading@10: }
yading@10: 
yading@10: static void mpeg4_encode_visual_object_header(MpegEncContext * s){
yading@10:     int profile_and_level_indication;
yading@10:     int vo_ver_id;
yading@10: 
yading@10:     if(s->avctx->profile != FF_PROFILE_UNKNOWN){
yading@10:         profile_and_level_indication = s->avctx->profile << 4;
yading@10:     }else if(s->max_b_frames || s->quarter_sample){
yading@10:         profile_and_level_indication= 0xF0; // adv simple
yading@10:     }else{
yading@10:         profile_and_level_indication= 0x00; // simple
yading@10:     }
yading@10: 
yading@10:     if(s->avctx->level != FF_LEVEL_UNKNOWN){
yading@10:         profile_and_level_indication |= s->avctx->level;
yading@10:     }else{
yading@10:         profile_and_level_indication |= 1; //level 1
yading@10:     }
yading@10: 
yading@10:     if(profile_and_level_indication>>4 == 0xF){
yading@10:         vo_ver_id= 5;
yading@10:     }else{
yading@10:         vo_ver_id= 1;
yading@10:     }
yading@10: 
yading@10:     //FIXME levels
yading@10: 
yading@10:     put_bits(&s->pb, 16, 0);
yading@10:     put_bits(&s->pb, 16, VOS_STARTCODE);
yading@10: 
yading@10:     put_bits(&s->pb, 8, profile_and_level_indication);
yading@10: 
yading@10:     put_bits(&s->pb, 16, 0);
yading@10:     put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
yading@10: 
yading@10:     put_bits(&s->pb, 1, 1);
yading@10:         put_bits(&s->pb, 4, vo_ver_id);
yading@10:         put_bits(&s->pb, 3, 1); //priority
yading@10: 
yading@10:     put_bits(&s->pb, 4, 1); //visual obj type== video obj
yading@10: 
yading@10:     put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
yading@10: 
yading@10:     ff_mpeg4_stuffing(&s->pb);
yading@10: }
yading@10: 
yading@10: static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
yading@10: {
yading@10:     int vo_ver_id;
yading@10: 
yading@10:     if (!CONFIG_MPEG4_ENCODER)  return;
yading@10: 
yading@10:     if(s->max_b_frames || s->quarter_sample){
yading@10:         vo_ver_id= 5;
yading@10:         s->vo_type= ADV_SIMPLE_VO_TYPE;
yading@10:     }else{
yading@10:         vo_ver_id= 1;
yading@10:         s->vo_type= SIMPLE_VO_TYPE;
yading@10:     }
yading@10: 
yading@10:     put_bits(&s->pb, 16, 0);
yading@10:     put_bits(&s->pb, 16, 0x100 + vo_number);        /* video obj */
yading@10:     put_bits(&s->pb, 16, 0);
yading@10:     put_bits(&s->pb, 16, 0x120 + vol_number);       /* video obj layer */
yading@10: 
yading@10:     put_bits(&s->pb, 1, 0);             /* random access vol */
yading@10:     put_bits(&s->pb, 8, s->vo_type);    /* video obj type indication */
yading@10:     if(s->workaround_bugs & FF_BUG_MS) {
yading@10:         put_bits(&s->pb, 1, 0);         /* is obj layer id= no */
yading@10:     } else {
yading@10:         put_bits(&s->pb, 1, 1);         /* is obj layer id= yes */
yading@10:         put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
yading@10:         put_bits(&s->pb, 3, 1);         /* is obj layer priority */
yading@10:     }
yading@10: 
yading@10:     s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
yading@10: 
yading@10:     put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
yading@10:     if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
yading@10:         av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
yading@10:                    s->avctx->sample_aspect_ratio.num,  s->avctx->sample_aspect_ratio.den, 255);
yading@10:         put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
yading@10:         put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
yading@10:     }
yading@10: 
yading@10:     if(s->workaround_bugs & FF_BUG_MS) { //
yading@10:         put_bits(&s->pb, 1, 0);         /* vol control parameters= no @@@ */
yading@10:     } else {
yading@10:         put_bits(&s->pb, 1, 1);         /* vol control parameters= yes */
yading@10:         put_bits(&s->pb, 2, 1);         /* chroma format YUV 420/YV12 */
yading@10:         put_bits(&s->pb, 1, s->low_delay);
yading@10:         put_bits(&s->pb, 1, 0);         /* vbv parameters= no */
yading@10:     }
yading@10: 
yading@10:     put_bits(&s->pb, 2, RECT_SHAPE);    /* vol shape= rectangle */
yading@10:     put_bits(&s->pb, 1, 1);             /* marker bit */
yading@10: 
yading@10:     put_bits(&s->pb, 16, s->avctx->time_base.den);
yading@10:     if (s->time_increment_bits < 1)
yading@10:         s->time_increment_bits = 1;
yading@10:     put_bits(&s->pb, 1, 1);             /* marker bit */
yading@10:     put_bits(&s->pb, 1, 0);             /* fixed vop rate=no */
yading@10:     put_bits(&s->pb, 1, 1);             /* marker bit */
yading@10:     put_bits(&s->pb, 13, s->width);     /* vol width */
yading@10:     put_bits(&s->pb, 1, 1);             /* marker bit */
yading@10:     put_bits(&s->pb, 13, s->height);    /* vol height */
yading@10:     put_bits(&s->pb, 1, 1);             /* marker bit */
yading@10:     put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
yading@10:     put_bits(&s->pb, 1, 1);             /* obmc disable */
yading@10:     if (vo_ver_id == 1) {
yading@10:         put_bits(&s->pb, 1, s->vol_sprite_usage);       /* sprite enable */
yading@10:     }else{
yading@10:         put_bits(&s->pb, 2, s->vol_sprite_usage);       /* sprite enable */
yading@10:     }
yading@10: 
yading@10:     put_bits(&s->pb, 1, 0);             /* not 8 bit == false */
yading@10:     put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
yading@10: 
yading@10:     if(s->mpeg_quant){
yading@10:         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
yading@10:         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
yading@10:     }
yading@10: 
yading@10:     if (vo_ver_id != 1)
yading@10:         put_bits(&s->pb, 1, s->quarter_sample);
yading@10:     put_bits(&s->pb, 1, 1);             /* complexity estimation disable */
yading@10:     s->resync_marker= s->rtp_mode;
yading@10:     put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
yading@10:     put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
yading@10:     if(s->data_partitioning){
yading@10:         put_bits(&s->pb, 1, 0);         /* no rvlc */
yading@10:     }
yading@10: 
yading@10:     if (vo_ver_id != 1){
yading@10:         put_bits(&s->pb, 1, 0);         /* newpred */
yading@10:         put_bits(&s->pb, 1, 0);         /* reduced res vop */
yading@10:     }
yading@10:     put_bits(&s->pb, 1, 0);             /* scalability */
yading@10: 
yading@10:     ff_mpeg4_stuffing(&s->pb);
yading@10: 
yading@10:     /* user data */
yading@10:     if(!(s->flags & CODEC_FLAG_BITEXACT)){
yading@10:         put_bits(&s->pb, 16, 0);
yading@10:         put_bits(&s->pb, 16, 0x1B2);    /* user_data */
yading@10:         avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
yading@10:     }
yading@10: }
yading@10: 
yading@10: /* write mpeg4 VOP header */
yading@10: void ff_mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
yading@10: {
yading@10:     int time_incr;
yading@10:     int time_div, time_mod;
yading@10: 
yading@10:     if(s->pict_type==AV_PICTURE_TYPE_I){
yading@10:         if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
yading@10:             if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
yading@10:                 mpeg4_encode_visual_object_header(s);
yading@10:             if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
yading@10:                 mpeg4_encode_vol_header(s, 0, 0);
yading@10:         }
yading@10:         if(!(s->workaround_bugs & FF_BUG_MS))
yading@10:             mpeg4_encode_gop_header(s);
yading@10:     }
yading@10: 
yading@10:     s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
yading@10: 
yading@10:     put_bits(&s->pb, 16, 0);                /* vop header */
yading@10:     put_bits(&s->pb, 16, VOP_STARTCODE);    /* vop header */
yading@10:     put_bits(&s->pb, 2, s->pict_type - 1);  /* pict type: I = 0 , P = 1 */
yading@10: 
yading@10:     time_div= FFUDIV(s->time, s->avctx->time_base.den);
yading@10:     time_mod= FFUMOD(s->time, s->avctx->time_base.den);
yading@10:     time_incr= time_div - s->last_time_base;
yading@10:     av_assert0(time_incr >= 0);
yading@10:     while(time_incr--)
yading@10:         put_bits(&s->pb, 1, 1);
yading@10: 
yading@10:     put_bits(&s->pb, 1, 0);
yading@10: 
yading@10:     put_bits(&s->pb, 1, 1);                             /* marker */
yading@10:     put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
yading@10:     put_bits(&s->pb, 1, 1);                             /* marker */
yading@10:     put_bits(&s->pb, 1, 1);                             /* vop coded */
yading@10:     if (    s->pict_type == AV_PICTURE_TYPE_P
yading@10:         || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
yading@10:         put_bits(&s->pb, 1, s->no_rounding);    /* rounding type */
yading@10:     }
yading@10:     put_bits(&s->pb, 3, 0);     /* intra dc VLC threshold */
yading@10:     if(!s->progressive_sequence){
yading@10:          put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
yading@10:          put_bits(&s->pb, 1, s->alternate_scan);
yading@10:     }
yading@10:     //FIXME sprite stuff
yading@10: 
yading@10:     put_bits(&s->pb, 5, s->qscale);
yading@10: 
yading@10:     if (s->pict_type != AV_PICTURE_TYPE_I)
yading@10:         put_bits(&s->pb, 3, s->f_code); /* fcode_for */
yading@10:     if (s->pict_type == AV_PICTURE_TYPE_B)
yading@10:         put_bits(&s->pb, 3, s->b_code); /* fcode_back */
yading@10: }
yading@10: 
yading@10: 
yading@10: static void init_uni_dc_tab(void)
yading@10: {
yading@10:     int level, uni_code, uni_len;
yading@10: 
yading@10:     for(level=-256; level<256; level++){
yading@10:         int size, v, l;
yading@10:         /* find number of bits */
yading@10:         size = 0;
yading@10:         v = abs(level);
yading@10:         while (v) {
yading@10:             v >>= 1;
yading@10:             size++;
yading@10:         }
yading@10: 
yading@10:         if (level < 0)
yading@10:             l= (-level) ^ ((1 << size) - 1);
yading@10:         else
yading@10:             l= level;
yading@10: 
yading@10:         /* luminance */
yading@10:         uni_code= ff_mpeg4_DCtab_lum[size][0];
yading@10:         uni_len = ff_mpeg4_DCtab_lum[size][1];
yading@10: 
yading@10:         if (size > 0) {
yading@10:             uni_code<<=size; uni_code|=l;
yading@10:             uni_len+=size;
yading@10:             if (size > 8){
yading@10:                 uni_code<<=1; uni_code|=1;
yading@10:                 uni_len++;
yading@10:             }
yading@10:         }
yading@10:         uni_DCtab_lum_bits[level+256]= uni_code;
yading@10:         uni_DCtab_lum_len [level+256]= uni_len;
yading@10: 
yading@10:         /* chrominance */
yading@10:         uni_code= ff_mpeg4_DCtab_chrom[size][0];
yading@10:         uni_len = ff_mpeg4_DCtab_chrom[size][1];
yading@10: 
yading@10:         if (size > 0) {
yading@10:             uni_code<<=size; uni_code|=l;
yading@10:             uni_len+=size;
yading@10:             if (size > 8){
yading@10:                 uni_code<<=1; uni_code|=1;
yading@10:                 uni_len++;
yading@10:             }
yading@10:         }
yading@10:         uni_DCtab_chrom_bits[level+256]= uni_code;
yading@10:         uni_DCtab_chrom_len [level+256]= uni_len;
yading@10: 
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
yading@10:     int slevel, run, last;
yading@10: 
yading@10:     av_assert0(MAX_LEVEL >= 64);
yading@10:     av_assert0(MAX_RUN   >= 63);
yading@10: 
yading@10:     for(slevel=-64; slevel<64; slevel++){
yading@10:         if(slevel==0) continue;
yading@10:         for(run=0; run<64; run++){
yading@10:             for(last=0; last<=1; last++){
yading@10:                 const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
yading@10:                 int level= slevel < 0 ? -slevel : slevel;
yading@10:                 int sign= slevel < 0 ? 1 : 0;
yading@10:                 int bits, len, code;
yading@10:                 int level1, run1;
yading@10: 
yading@10:                 len_tab[index]= 100;
yading@10: 
yading@10:                 /* ESC0 */
yading@10:                 code= get_rl_index(rl, last, run, level);
yading@10:                 bits= rl->table_vlc[code][0];
yading@10:                 len=  rl->table_vlc[code][1];
yading@10:                 bits=bits*2+sign; len++;
yading@10: 
yading@10:                 if(code!=rl->n && len < len_tab[index]){
yading@10:                     bits_tab[index]= bits;
yading@10:                     len_tab [index]= len;
yading@10:                 }
yading@10:                 /* ESC1 */
yading@10:                 bits= rl->table_vlc[rl->n][0];
yading@10:                 len=  rl->table_vlc[rl->n][1];
yading@10:                 bits=bits*2;    len++; //esc1
yading@10:                 level1= level - rl->max_level[last][run];
yading@10:                 if(level1>0){
yading@10:                     code= get_rl_index(rl, last, run, level1);
yading@10:                     bits<<= rl->table_vlc[code][1];
yading@10:                     len  += rl->table_vlc[code][1];
yading@10:                     bits += rl->table_vlc[code][0];
yading@10:                     bits=bits*2+sign; len++;
yading@10: 
yading@10:                     if(code!=rl->n && len < len_tab[index]){
yading@10:                         bits_tab[index]= bits;
yading@10:                         len_tab [index]= len;
yading@10:                     }
yading@10:                 }
yading@10:                 /* ESC2 */
yading@10:                 bits= rl->table_vlc[rl->n][0];
yading@10:                 len=  rl->table_vlc[rl->n][1];
yading@10:                 bits=bits*4+2;    len+=2; //esc2
yading@10:                 run1 = run - rl->max_run[last][level] - 1;
yading@10:                 if(run1>=0){
yading@10:                     code= get_rl_index(rl, last, run1, level);
yading@10:                     bits<<= rl->table_vlc[code][1];
yading@10:                     len  += rl->table_vlc[code][1];
yading@10:                     bits += rl->table_vlc[code][0];
yading@10:                     bits=bits*2+sign; len++;
yading@10: 
yading@10:                     if(code!=rl->n && len < len_tab[index]){
yading@10:                         bits_tab[index]= bits;
yading@10:                         len_tab [index]= len;
yading@10:                     }
yading@10:                 }
yading@10:                 /* ESC3 */
yading@10:                 bits= rl->table_vlc[rl->n][0];
yading@10:                 len = rl->table_vlc[rl->n][1];
yading@10:                 bits=bits*4+3;    len+=2; //esc3
yading@10:                 bits=bits*2+last; len++;
yading@10:                 bits=bits*64+run; len+=6;
yading@10:                 bits=bits*2+1;    len++;  //marker
yading@10:                 bits=bits*4096+(slevel&0xfff); len+=12;
yading@10:                 bits=bits*2+1;    len++;  //marker
yading@10: 
yading@10:                 if(len < len_tab[index]){
yading@10:                     bits_tab[index]= bits;
yading@10:                     len_tab [index]= len;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static av_cold int encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     MpegEncContext *s = avctx->priv_data;
yading@10:     int ret;
yading@10:     static int done = 0;
yading@10: 
yading@10:     if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if((ret=ff_MPV_encode_init(avctx)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     if (!done) {
yading@10:         done = 1;
yading@10: 
yading@10:         init_uni_dc_tab();
yading@10: 
yading@10:         ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
yading@10: 
yading@10:         init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
yading@10:         init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
yading@10:     }
yading@10: 
yading@10:     s->min_qcoeff= -2048;
yading@10:     s->max_qcoeff=  2047;
yading@10:     s->intra_ac_vlc_length     = uni_mpeg4_intra_rl_len;
yading@10:     s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
yading@10:     s->inter_ac_vlc_length     = uni_mpeg4_inter_rl_len;
yading@10:     s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
yading@10:     s->luma_dc_vlc_length= uni_DCtab_lum_len;
yading@10:     s->ac_esc_length= 7+2+1+6+1+12+1;
yading@10:     s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
yading@10:     s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
yading@10: 
yading@10:     if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
yading@10: 
yading@10:         s->avctx->extradata= av_malloc(1024);
yading@10:         init_put_bits(&s->pb, s->avctx->extradata, 1024);
yading@10: 
yading@10:         if(!(s->workaround_bugs & FF_BUG_MS))
yading@10:             mpeg4_encode_visual_object_header(s);
yading@10:         mpeg4_encode_vol_header(s, 0, 0);
yading@10: 
yading@10: //            ff_mpeg4_stuffing(&s->pb); ?
yading@10:         flush_put_bits(&s->pb);
yading@10:         s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: void ff_mpeg4_init_partitions(MpegEncContext *s)
yading@10: {
yading@10:     uint8_t *start= put_bits_ptr(&s->pb);
yading@10:     uint8_t *end= s->pb.buf_end;
yading@10:     int size= end - start;
yading@10:     int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
yading@10:     int tex_size= (size - 2*pb_size)&(~3);
yading@10: 
yading@10:     set_put_bits_buffer_size(&s->pb, pb_size);
yading@10:     init_put_bits(&s->tex_pb, start + pb_size           , tex_size);
yading@10:     init_put_bits(&s->pb2   , start + pb_size + tex_size, pb_size);
yading@10: }
yading@10: 
yading@10: void ff_mpeg4_merge_partitions(MpegEncContext *s)
yading@10: {
yading@10:     const int pb2_len   = put_bits_count(&s->pb2   );
yading@10:     const int tex_pb_len= put_bits_count(&s->tex_pb);
yading@10:     const int bits= put_bits_count(&s->pb);
yading@10: 
yading@10:     if(s->pict_type==AV_PICTURE_TYPE_I){
yading@10:         put_bits(&s->pb, 19, DC_MARKER);
yading@10:         s->misc_bits+=19 + pb2_len + bits - s->last_bits;
yading@10:         s->i_tex_bits+= tex_pb_len;
yading@10:     }else{
yading@10:         put_bits(&s->pb, 17, MOTION_MARKER);
yading@10:         s->misc_bits+=17 + pb2_len;
yading@10:         s->mv_bits+= bits - s->last_bits;
yading@10:         s->p_tex_bits+= tex_pb_len;
yading@10:     }
yading@10: 
yading@10:     flush_put_bits(&s->pb2);
yading@10:     flush_put_bits(&s->tex_pb);
yading@10: 
yading@10:     set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
yading@10:     avpriv_copy_bits(&s->pb, s->pb2.buf   , pb2_len);
yading@10:     avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
yading@10:     s->last_bits= put_bits_count(&s->pb);
yading@10: }
yading@10: 
yading@10: 
yading@10: void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
yading@10: {
yading@10:     int mb_num_bits= av_log2(s->mb_num - 1) + 1;
yading@10: 
yading@10:     put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
yading@10:     put_bits(&s->pb, 1, 1);
yading@10: 
yading@10:     put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
yading@10:     put_bits(&s->pb, s->quant_precision, s->qscale);
yading@10:     put_bits(&s->pb, 1, 0); /* no HEC */
yading@10: }
yading@10: 
yading@10: #define OFFSET(x) offsetof(MpegEncContext, x)
yading@10: #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
yading@10: static const AVOption options[] = {
yading@10:     { "data_partitioning",       "Use data partitioning.",      OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
yading@10:     { "alternate_scan",          "Enable alternate scantable.", OFFSET(alternate_scan),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
yading@10:     FF_MPV_COMMON_OPTS
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: static const AVClass mpeg4enc_class = {
yading@10:     .class_name = "MPEG4 encoder",
yading@10:     .item_name  = av_default_item_name,
yading@10:     .option     = options,
yading@10:     .version    = LIBAVUTIL_VERSION_INT,
yading@10: };
yading@10: 
yading@10: AVCodec ff_mpeg4_encoder = {
yading@10:     .name           = "mpeg4",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_MPEG4,
yading@10:     .priv_data_size = sizeof(MpegEncContext),
yading@10:     .init           = encode_init,
yading@10:     .encode2        = ff_MPV_encode_picture,
yading@10:     .close          = ff_MPV_encode_end,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
yading@10:     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
yading@10:     .priv_class     = &mpeg4enc_class,
yading@10: };