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msmpeg4: Split encoding backend code off from general backend code.

tags/n0.11
Diego Biurrun 13 years ago
parent
eb727387fd
commit
2f4b476e04
6 changed files with 734 additions and 690 deletions
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  1. +7
    -5
      libavcodec/Makefile
  2. +15
    -685
      libavcodec/msmpeg4.c
  3. +12
    -0
      libavcodec/msmpeg4.h
  4. +4
    -0
      libavcodec/msmpeg4data.c
  5. +4
    -0
      libavcodec/msmpeg4data.h
  6. +692
    -0
      libavcodec/msmpeg4enc.c

+ 7
- 5
libavcodec/Makefile View File

@@ -272,12 +272,14 @@ OBJS-$(CONFIG_MPEG4_VAAPI_HWACCEL) += vaapi_mpeg4.o
OBJS-$(CONFIG_MSMPEG4V1_DECODER) += msmpeg4.o msmpeg4data.o
OBJS-$(CONFIG_MSMPEG4V2_DECODER) += msmpeg4.o msmpeg4data.o h263dec.o \
h263.o ituh263dec.o mpeg4videodec.o
OBJS-$(CONFIG_MSMPEG4V2_ENCODER) += msmpeg4.o msmpeg4data.o h263dec.o \
h263.o ituh263dec.o mpeg4videodec.o
OBJS-$(CONFIG_MSMPEG4V2_ENCODER) += msmpeg4.o msmpeg4enc.o msmpeg4data.o \
h263dec.o h263.o ituh263dec.o \
mpeg4videodec.o
OBJS-$(CONFIG_MSMPEG4V3_DECODER) += msmpeg4.o msmpeg4data.o h263dec.o \
h263.o ituh263dec.o mpeg4videodec.o
OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4.o msmpeg4data.o h263dec.o \
h263.o ituh263dec.o mpeg4videodec.o
OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4.o msmpeg4enc.o msmpeg4data.o \
h263dec.o h263.o ituh263dec.o \
mpeg4videodec.o
OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o msrledec.o
OBJS-$(CONFIG_MSVIDEO1_DECODER) += msvideo1.o
OBJS-$(CONFIG_MSZH_DECODER) += lcldec.o
@@ -429,7 +431,7 @@ OBJS-$(CONFIG_WMV2_DECODER) += wmv2dec.o wmv2.o \
msmpeg4.o msmpeg4data.o \
intrax8.o intrax8dsp.o
OBJS-$(CONFIG_WMV2_ENCODER) += wmv2enc.o wmv2.o \
msmpeg4.o msmpeg4data.o \
msmpeg4.o msmpeg4enc.o msmpeg4data.o \
mpeg4videodec.o ituh263dec.o h263dec.o
OBJS-$(CONFIG_WNV1_DECODER) += wnv1.o
OBJS-$(CONFIG_WS_SND1_DECODER) += ws-snd1.o


+ 15
- 685
libavcodec/msmpeg4.c View File

@@ -34,6 +34,7 @@
#include "libavutil/x86_cpu.h"
#include "h263.h"
#include "mpeg4video.h"
#include "msmpeg4data.h"
#include "vc1data.h"

/*
@@ -52,22 +53,8 @@
#define V2_MV_VLC_BITS 9
#define TEX_VLC_BITS 9

#define II_BITRATE 128*1024
#define MBAC_BITRATE 50*1024

#define DEFAULT_INTER_INDEX 3

static uint32_t v2_dc_lum_table[512][2];
static uint32_t v2_dc_chroma_table[512][2];

#include "msmpeg4data.h"

#if CONFIG_ENCODERS //strangely gcc includes this even if it is not referenced
static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];
#endif //CONFIG_ENCODERS

static uint8_t static_rl_table_store[NB_RL_TABLES][2][2*MAX_RUN + MAX_LEVEL + 3];

/* This table is practically identical to the one from h263
* except that it is inverted. */
static av_cold void init_h263_dc_for_msmpeg4(void)
@@ -102,8 +89,8 @@ static av_cold void init_h263_dc_for_msmpeg4(void)
uni_len++;
}
}
v2_dc_lum_table[level+256][0]= uni_code;
v2_dc_lum_table[level+256][1]= uni_len;
ff_v2_dc_lum_table[level + 256][0] = uni_code;
ff_v2_dc_lum_table[level + 256][1] = uni_len;

/* chrominance h263 */
uni_code= ff_mpeg4_DCtab_chrom[size][0];
@@ -118,13 +105,13 @@ static av_cold void init_h263_dc_for_msmpeg4(void)
uni_len++;
}
}
v2_dc_chroma_table[level+256][0]= uni_code;
v2_dc_chroma_table[level+256][1]= uni_len;
ff_v2_dc_chroma_table[level + 256][0] = uni_code;
ff_v2_dc_chroma_table[level + 256][1] = uni_len;

}
}

static av_cold void common_init(MpegEncContext * s)
av_cold void ff_msmpeg4_common_init(MpegEncContext *s)
{
static int initialized=0;

@@ -173,251 +160,6 @@ static av_cold void common_init(MpegEncContext * s)
}
}

#if CONFIG_ENCODERS

/* build the table which associate a (x,y) motion vector to a vlc */
static void init_mv_table(MVTable *tab)
{
int i, x, y;

tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);
/* mark all entries as not used */
for(i=0;i<4096;i++)
tab->table_mv_index[i] = tab->n;

for(i=0;i<tab->n;i++) {
x = tab->table_mvx[i];
y = tab->table_mvy[i];
tab->table_mv_index[(x << 6) | y] = i;
}
}

void ff_msmpeg4_code012(PutBitContext *pb, int n)
{
if (n == 0) {
put_bits(pb, 1, 0);
} else {
put_bits(pb, 1, 1);
put_bits(pb, 1, (n >= 2));
}
}

static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){
int size=0;
int code;
int run_diff= intra ? 0 : 1;

code = get_rl_index(rl, last, run, level);
size+= rl->table_vlc[code][1];
if (code == rl->n) {
int level1, run1;

level1 = level - rl->max_level[last][run];
if (level1 < 1)
goto esc2;
code = get_rl_index(rl, last, run, level1);
if (code == rl->n) {
esc2:
size++;
if (level > MAX_LEVEL)
goto esc3;
run1 = run - rl->max_run[last][level] - run_diff;
if (run1 < 0)
goto esc3;
code = get_rl_index(rl, last, run1, level);
if (code == rl->n) {
esc3:
/* third escape */
size+=1+1+6+8;
} else {
/* second escape */
size+= 1+1+ rl->table_vlc[code][1];
}
} else {
/* first escape */
size+= 1+1+ rl->table_vlc[code][1];
}
} else {
size++;
}
return size;
}

av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
{
static int init_done=0;
int i;

common_init(s);
if(s->msmpeg4_version>=4){
s->min_qcoeff= -255;
s->max_qcoeff= 255;
}

if (!init_done) {
/* init various encoding tables */
init_done = 1;
init_mv_table(&ff_mv_tables[0]);
init_mv_table(&ff_mv_tables[1]);
for(i=0;i<NB_RL_TABLES;i++)
ff_init_rl(&ff_rl_table[i], static_rl_table_store[i]);

for(i=0; i<NB_RL_TABLES; i++){
int level;
for (level = 1; level <= MAX_LEVEL; level++) {
int run;
for(run=0; run<=MAX_RUN; run++){
int last;
for(last=0; last<2; last++){
rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0);
}
}
}
}
}
}

static void find_best_tables(MpegEncContext * s)
{
int i;
int best =-1, best_size =9999999;
int chroma_best=-1, best_chroma_size=9999999;

for(i=0; i<3; i++){
int level;
int chroma_size=0;
int size=0;

if(i>0){// ;)
size++;
chroma_size++;
}
for(level=0; level<=MAX_LEVEL; level++){
int run;
for(run=0; run<=MAX_RUN; run++){
int last;
const int last_size= size + chroma_size;
for(last=0; last<2; last++){
int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];
int intra_luma_count = s->ac_stats[1][0][level][run][last];
int intra_chroma_count= s->ac_stats[1][1][level][run][last];

if(s->pict_type==AV_PICTURE_TYPE_I){
size += intra_luma_count *rl_length[i ][level][run][last];
chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
}else{
size+= intra_luma_count *rl_length[i ][level][run][last]
+intra_chroma_count*rl_length[i+3][level][run][last]
+inter_count *rl_length[i+3][level][run][last];
}
}
if(last_size == size+chroma_size) break;
}
}
if(size<best_size){
best_size= size;
best= i;
}
if(chroma_size<best_chroma_size){
best_chroma_size= chroma_size;
chroma_best= i;
}
}

// printf("type:%d, best:%d, qp:%d, var:%d, mcvar:%d, size:%d //\n",
// s->pict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size);

if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;

memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);

s->rl_table_index = best;
s->rl_chroma_table_index= chroma_best;

if(s->pict_type != s->last_non_b_pict_type){
s->rl_table_index= 2;
if(s->pict_type==AV_PICTURE_TYPE_I)
s->rl_chroma_table_index= 1;
else
s->rl_chroma_table_index= 2;
}

}

/* write MSMPEG4 compatible frame header */
void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
{
find_best_tables(s);

avpriv_align_put_bits(&s->pb);
put_bits(&s->pb, 2, s->pict_type - 1);

put_bits(&s->pb, 5, s->qscale);
if(s->msmpeg4_version<=2){
s->rl_table_index = 2;
s->rl_chroma_table_index = 2;
}

s->dc_table_index = 1;
s->mv_table_index = 1; /* only if P frame */
s->use_skip_mb_code = 1; /* only if P frame */
s->per_mb_rl_table = 0;
if(s->msmpeg4_version==4)
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);

if (s->pict_type == AV_PICTURE_TYPE_I) {
s->slice_height= s->mb_height/1;
put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);

if(s->msmpeg4_version==4){
ff_msmpeg4_encode_ext_header(s);
if(s->bit_rate>MBAC_BITRATE)
put_bits(&s->pb, 1, s->per_mb_rl_table);
}

if(s->msmpeg4_version>2){
if(!s->per_mb_rl_table){
ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
ff_msmpeg4_code012(&s->pb, s->rl_table_index);
}

put_bits(&s->pb, 1, s->dc_table_index);
}
} else {
put_bits(&s->pb, 1, s->use_skip_mb_code);

if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
put_bits(&s->pb, 1, s->per_mb_rl_table);

if(s->msmpeg4_version>2){
if(!s->per_mb_rl_table)
ff_msmpeg4_code012(&s->pb, s->rl_table_index);

put_bits(&s->pb, 1, s->dc_table_index);

put_bits(&s->pb, 1, s->mv_table_index);
}
}

s->esc3_level_length= 0;
s->esc3_run_length= 0;
}

void ff_msmpeg4_encode_ext_header(MpegEncContext * s)
{
put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29

put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));

if(s->msmpeg4_version>=3)
put_bits(&s->pb, 1, s->flipflop_rounding);
else
assert(s->flipflop_rounding==0);
}

#endif //CONFIG_ENCODERS

/* predict coded block */
int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
{
@@ -445,217 +187,6 @@ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block
return pred;
}

#if CONFIG_ENCODERS

void ff_msmpeg4_encode_motion(MpegEncContext * s,
int mx, int my)
{
int code;
MVTable *mv;

/* modulo encoding */
/* WARNING : you cannot reach all the MVs even with the modulo
encoding. This is a somewhat strange compromise they took !!! */
if (mx <= -64)
mx += 64;
else if (mx >= 64)
mx -= 64;
if (my <= -64)
my += 64;
else if (my >= 64)
my -= 64;

mx += 32;
my += 32;
#if 0
if ((unsigned)mx >= 64 ||
(unsigned)my >= 64)
av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my);
#endif
mv = &ff_mv_tables[s->mv_table_index];

code = mv->table_mv_index[(mx << 6) | my];
put_bits(&s->pb,
mv->table_mv_bits[code],
mv->table_mv_code[code]);
if (code == mv->n) {
/* escape : code literally */
put_bits(&s->pb, 6, mx);
put_bits(&s->pb, 6, my);
}
}

void ff_msmpeg4_handle_slices(MpegEncContext *s){
if (s->mb_x == 0) {
if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
if(s->msmpeg4_version < 4){
ff_mpeg4_clean_buffers(s);
}
s->first_slice_line = 1;
} else {
s->first_slice_line = 0;
}
}
}

static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
{
int range, bit_size, sign, code, bits;

if (val == 0) {
/* zero vector */
code = 0;
put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);
} else {
bit_size = s->f_code - 1;
range = 1 << bit_size;
if (val <= -64)
val += 64;
else if (val >= 64)
val -= 64;

if (val >= 0) {
sign = 0;
} else {
val = -val;
sign = 1;
}
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);

put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);
if (bit_size > 0) {
put_bits(&s->pb, bit_size, bits);
}
}
}

void ff_msmpeg4_encode_mb(MpegEncContext * s,
DCTELEM block[6][64],
int motion_x, int motion_y)
{
int cbp, coded_cbp, i;
int pred_x, pred_y;
uint8_t *coded_block;

ff_msmpeg4_handle_slices(s);

if (!s->mb_intra) {
/* compute cbp */
cbp = 0;
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 0)
cbp |= 1 << (5 - i);
}
if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
/* skip macroblock */
put_bits(&s->pb, 1, 1);
s->last_bits++;
s->misc_bits++;
s->skip_count++;

return;
}
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */

if(s->msmpeg4_version<=2){
put_bits(&s->pb,
ff_v2_mb_type[cbp&3][1],
ff_v2_mb_type[cbp&3][0]);
if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
else coded_cbp= cbp;

put_bits(&s->pb,
ff_h263_cbpy_tab[coded_cbp>>2][1],
ff_h263_cbpy_tab[coded_cbp>>2][0]);

s->misc_bits += get_bits_diff(s);

ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
msmpeg4v2_encode_motion(s, motion_x - pred_x);
msmpeg4v2_encode_motion(s, motion_y - pred_y);
}else{
put_bits(&s->pb,
ff_table_mb_non_intra[cbp + 64][1],
ff_table_mb_non_intra[cbp + 64][0]);

s->misc_bits += get_bits_diff(s);

/* motion vector */
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
ff_msmpeg4_encode_motion(s, motion_x - pred_x,
motion_y - pred_y);
}

s->mv_bits += get_bits_diff(s);

for (i = 0; i < 6; i++) {
ff_msmpeg4_encode_block(s, block[i], i);
}
s->p_tex_bits += get_bits_diff(s);
} else {
/* compute cbp */
cbp = 0;
coded_cbp = 0;
for (i = 0; i < 6; i++) {
int val, pred;
val = (s->block_last_index[i] >= 1);
cbp |= val << (5 - i);
if (i < 4) {
/* predict value for close blocks only for luma */
pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
*coded_block = val;
val = val ^ pred;
}
coded_cbp |= val << (5 - i);
}

if(s->msmpeg4_version<=2){
if (s->pict_type == AV_PICTURE_TYPE_I) {
put_bits(&s->pb,
ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);
} else {
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */
put_bits(&s->pb,
ff_v2_mb_type[(cbp&3) + 4][1],
ff_v2_mb_type[(cbp&3) + 4][0]);
}
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
put_bits(&s->pb,
ff_h263_cbpy_tab[cbp>>2][1],
ff_h263_cbpy_tab[cbp>>2][0]);
}else{
if (s->pict_type == AV_PICTURE_TYPE_I) {
put_bits(&s->pb,
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
} else {
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */
put_bits(&s->pb,
ff_table_mb_non_intra[cbp][1],
ff_table_mb_non_intra[cbp][0]);
}
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
if(s->inter_intra_pred){
s->h263_aic_dir=0;
put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
}
}
s->misc_bits += get_bits_diff(s);

for (i = 0; i < 6; i++) {
ff_msmpeg4_encode_block(s, block[i], i);
}
s->i_tex_bits += get_bits_diff(s);
s->i_count++;
}
}

#endif //CONFIG_ENCODERS

static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n,
int32_t **dc_val_ptr)
{
@@ -685,8 +216,8 @@ static int get_dc(uint8_t *src, int stride, int scale)
}

/* dir = 0: left, dir = 1: top prediction */
static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
int16_t **dc_val_ptr, int *dir_ptr)
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,
int16_t **dc_val_ptr, int *dir_ptr)
{
int a, b, c, wrap, pred, scale;
int16_t *dc_val;
@@ -832,207 +363,6 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
return pred;
}

#define DC_MAX 119

static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
{
int sign, code;
int pred, extquant;
int extrabits = 0;

int16_t *dc_val;
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);

/* update predictor */
if (n < 4) {
*dc_val = level * s->y_dc_scale;
} else {
*dc_val = level * s->c_dc_scale;
}

/* do the prediction */
level -= pred;

if(s->msmpeg4_version<=2){
if (n < 4) {
put_bits(&s->pb,
v2_dc_lum_table[level+256][1],
v2_dc_lum_table[level+256][0]);
}else{
put_bits(&s->pb,
v2_dc_chroma_table[level+256][1],
v2_dc_chroma_table[level+256][0]);
}
}else{
sign = 0;
if (level < 0) {
level = -level;
sign = 1;
}
code = level;
if (code > DC_MAX)
code = DC_MAX;
else if( s->msmpeg4_version>=6 ) {
if( s->qscale == 1 ) {
extquant = (level + 3) & 0x3;
code = ((level+3)>>2);
} else if( s->qscale == 2 ) {
extquant = (level + 1) & 0x1;
code = ((level+1)>>1);
}
}

if (s->dc_table_index == 0) {
if (n < 4) {
put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
}
} else {
if (n < 4) {
put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
}
}

if(s->msmpeg4_version>=6 && s->qscale<=2)
extrabits = 3 - s->qscale;

if (code == DC_MAX)
put_bits(&s->pb, 8 + extrabits, level);
else if(extrabits > 0)//== VC1 && s->qscale<=2
put_bits(&s->pb, extrabits, extquant);

if (level != 0) {
put_bits(&s->pb, 1, sign);
}
}
}

/* Encoding of a block. Very similar to MPEG4 except for a different
escape coding (same as H263) and more vlc tables.
*/
void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n)
{
int level, run, last, i, j, last_index;
int last_non_zero, sign, slevel;
int code, run_diff, dc_pred_dir;
const RLTable *rl;
const uint8_t *scantable;

if (s->mb_intra) {
msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
i = 1;
if (n < 4) {
rl = &ff_rl_table[s->rl_table_index];
} else {
rl = &ff_rl_table[3 + s->rl_chroma_table_index];
}
run_diff = s->msmpeg4_version>=4;
scantable= s->intra_scantable.permutated;
} else {
i = 0;
rl = &ff_rl_table[3 + s->rl_table_index];
if(s->msmpeg4_version<=2)
run_diff = 0;
else
run_diff = 1;
scantable= s->inter_scantable.permutated;
}

/* recalculate block_last_index for M$ wmv1 */
if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){
for(last_index=63; last_index>=0; last_index--){
if(block[scantable[last_index]]) break;
}
s->block_last_index[n]= last_index;
}else
last_index = s->block_last_index[n];
/* AC coefs */
last_non_zero = i - 1;
for (; i <= last_index; i++) {
j = scantable[i];
level = block[j];
if (level) {
run = i - last_non_zero - 1;
last = (i == last_index);
sign = 0;
slevel = level;
if (level < 0) {
sign = 1;
level = -level;
}

if(level<=MAX_LEVEL && run<=MAX_RUN){
s->ac_stats[s->mb_intra][n>3][level][run][last]++;
}

s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like

code = get_rl_index(rl, last, run, level);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
if (code == rl->n) {
int level1, run1;

level1 = level - rl->max_level[last][run];
if (level1 < 1)
goto esc2;
code = get_rl_index(rl, last, run, level1);
if (code == rl->n) {
esc2:
put_bits(&s->pb, 1, 0);
if (level > MAX_LEVEL)
goto esc3;
run1 = run - rl->max_run[last][level] - run_diff;
if (run1 < 0)
goto esc3;
code = get_rl_index(rl, last, run1+1, level);
if (s->msmpeg4_version == 4 && code == rl->n)
goto esc3;
code = get_rl_index(rl, last, run1, level);
if (code == rl->n) {
esc3:
/* third escape */
put_bits(&s->pb, 1, 0);
put_bits(&s->pb, 1, last);
if(s->msmpeg4_version>=4){
if(s->esc3_level_length==0){
s->esc3_level_length=8;
s->esc3_run_length= 6;
//ESCLVLSZ + ESCRUNSZ
if(s->qscale<8)
put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3);
else
put_bits(&s->pb, 8, 3);
}
put_bits(&s->pb, s->esc3_run_length, run);
put_bits(&s->pb, 1, sign);
put_bits(&s->pb, s->esc3_level_length, level);
}else{
put_bits(&s->pb, 6, run);
put_sbits(&s->pb, 8, slevel);
}
} else {
/* second escape */
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
put_bits(&s->pb, 1, sign);
}
} else {
/* first escape */
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
put_bits(&s->pb, 1, sign);
}
} else {
put_bits(&s->pb, 1, sign);
}
last_non_zero = i;
}
}
}

/****************************************/
/* decoding stuff */

@@ -1263,13 +593,13 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
if (ff_h263_decode_init(avctx) < 0)
return -1;

common_init(s);
ff_msmpeg4_common_init(s);

if (!done) {
done = 1;

for(i=0;i<NB_RL_TABLES;i++) {
ff_init_rl(&ff_rl_table[i], static_rl_table_store[i]);
ff_init_rl(&ff_rl_table[i], ff_static_rl_table_store[i]);
}
INIT_VLC_RL(ff_rl_table[0], 642);
INIT_VLC_RL(ff_rl_table[1], 1104);
@@ -1301,11 +631,11 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
&ff_table1_dc_chroma[0][0], 8, 4, 1216);

INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512,
&v2_dc_lum_table[0][1], 8, 4,
&v2_dc_lum_table[0][0], 8, 4, 1472);
&ff_v2_dc_lum_table[0][1], 8, 4,
&ff_v2_dc_lum_table[0][0], 8, 4, 1472);
INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512,
&v2_dc_chroma_table[0][1], 8, 4,
&v2_dc_chroma_table[0][0], 8, 4, 1506);
&ff_v2_dc_chroma_table[0][1], 8, 4,
&ff_v2_dc_chroma_table[0][0], 8, 4, 1506);

INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4,
&ff_v2_intra_cbpc[0][1], 2, 1,
@@ -1588,7 +918,7 @@ static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
*dc_val= level;
}else{
int16_t *dc_val;
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
level += pred;

/* update predictor */


+ 12
- 0
libavcodec/msmpeg4.h View File

@@ -22,19 +22,29 @@
#ifndef AVCODEC_MSMPEG4_H
#define AVCODEC_MSMPEG4_H

#include <stdint.h>

#include "config.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "msmpeg4data.h"
#include "put_bits.h"

#define INTER_INTRA_VLC_BITS 3
#define MB_NON_INTRA_VLC_BITS 9
#define MB_INTRA_VLC_BITS 9

#define II_BITRATE 128*1024
#define MBAC_BITRATE 50*1024

#define DC_MAX 119

extern VLC ff_mb_non_intra_vlc[4];
extern VLC ff_inter_intra_vlc;

void ff_msmpeg4_code012(PutBitContext *pb, int n);
void ff_msmpeg4_common_init(MpegEncContext *s);
void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n);
void ff_msmpeg4_handle_slices(MpegEncContext *s);
void ff_msmpeg4_encode_motion(MpegEncContext * s, int mx, int my);
@@ -43,6 +53,8 @@ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n,
int ff_msmpeg4_decode_motion(MpegEncContext * s, int *mx_ptr, int *my_ptr);
int ff_msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
int n, int coded, const uint8_t *scan_table);
int ff_msmpeg4_pred_dc(MpegEncContext *s, int n,
int16_t **dc_val_ptr, int *dir_ptr);
int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);

#define CONFIG_MSMPEG4_DECODER (CONFIG_MSMPEG4V1_DECODER || \


+ 4
- 0
libavcodec/msmpeg4data.c View File

@@ -29,6 +29,10 @@

#include "msmpeg4data.h"

uint32_t ff_v2_dc_lum_table[512][2];
uint32_t ff_v2_dc_chroma_table[512][2];
uint8_t ff_static_rl_table_store[NB_RL_TABLES][2][2 * MAX_RUN + MAX_LEVEL + 3];

VLC ff_msmp4_mb_i_vlc;
VLC ff_msmp4_dc_luma_vlc[2];
VLC ff_msmp4_dc_chroma_vlc[2];


+ 4
- 0
libavcodec/msmpeg4data.h View File

@@ -59,6 +59,10 @@ extern const uint8_t ff_wmv1_scantable[WMV1_SCANTABLE_COUNT][64];
#define NB_RL_TABLES 6

extern RLTable ff_rl_table[NB_RL_TABLES];
extern uint8_t ff_static_rl_table_store[NB_RL_TABLES][2][2 * MAX_RUN + MAX_LEVEL + 3];

extern uint32_t ff_v2_dc_lum_table[512][2];
extern uint32_t ff_v2_dc_chroma_table[512][2];

extern const uint8_t ff_wmv1_y_dc_scale_table[32];
extern const uint8_t ff_wmv1_c_dc_scale_table[32];


+ 692
- 0
libavcodec/msmpeg4enc.c View File

@@ -0,0 +1,692 @@
/*
* MSMPEG4 encoder backend
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

/**
* @file
* MSMPEG4 encoder backend
*/

#include <stdint.h>
#include <string.h>

#include "libavutil/avutil.h"
#include "libavutil/mem.h"
#include "mpegvideo.h"
#include "msmpeg4.h"
#include "h263.h"
#include "mpeg4video.h"
#include "msmpeg4.h"
#include "msmpeg4data.h"
#include "put_bits.h"
#include "rl.h"
#include "vc1data.h"

static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];

/* build the table which associate a (x,y) motion vector to a vlc */
static void init_mv_table(MVTable *tab)
{
int i, x, y;

tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);
/* mark all entries as not used */
for(i=0;i<4096;i++)
tab->table_mv_index[i] = tab->n;

for(i=0;i<tab->n;i++) {
x = tab->table_mvx[i];
y = tab->table_mvy[i];
tab->table_mv_index[(x << 6) | y] = i;
}
}

void ff_msmpeg4_code012(PutBitContext *pb, int n)
{
if (n == 0) {
put_bits(pb, 1, 0);
} else {
put_bits(pb, 1, 1);
put_bits(pb, 1, (n >= 2));
}
}

static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){
int size=0;
int code;
int run_diff= intra ? 0 : 1;

code = get_rl_index(rl, last, run, level);
size+= rl->table_vlc[code][1];
if (code == rl->n) {
int level1, run1;

level1 = level - rl->max_level[last][run];
if (level1 < 1)
goto esc2;
code = get_rl_index(rl, last, run, level1);
if (code == rl->n) {
esc2:
size++;
if (level > MAX_LEVEL)
goto esc3;
run1 = run - rl->max_run[last][level] - run_diff;
if (run1 < 0)
goto esc3;
code = get_rl_index(rl, last, run1, level);
if (code == rl->n) {
esc3:
/* third escape */
size+=1+1+6+8;
} else {
/* second escape */
size+= 1+1+ rl->table_vlc[code][1];
}
} else {
/* first escape */
size+= 1+1+ rl->table_vlc[code][1];
}
} else {
size++;
}
return size;
}

av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
{
static int init_done=0;
int i;

ff_msmpeg4_common_init(s);
if(s->msmpeg4_version>=4){
s->min_qcoeff= -255;
s->max_qcoeff= 255;
}

if (!init_done) {
/* init various encoding tables */
init_done = 1;
init_mv_table(&ff_mv_tables[0]);
init_mv_table(&ff_mv_tables[1]);
for(i=0;i<NB_RL_TABLES;i++)
ff_init_rl(&ff_rl_table[i], ff_static_rl_table_store[i]);

for(i=0; i<NB_RL_TABLES; i++){
int level;
for (level = 1; level <= MAX_LEVEL; level++) {
int run;
for(run=0; run<=MAX_RUN; run++){
int last;
for(last=0; last<2; last++){
rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0);
}
}
}
}
}
}

static void find_best_tables(MpegEncContext * s)
{
int i;
int best =-1, best_size =9999999;
int chroma_best=-1, best_chroma_size=9999999;

for(i=0; i<3; i++){
int level;
int chroma_size=0;
int size=0;

if(i>0){// ;)
size++;
chroma_size++;
}
for(level=0; level<=MAX_LEVEL; level++){
int run;
for(run=0; run<=MAX_RUN; run++){
int last;
const int last_size= size + chroma_size;
for(last=0; last<2; last++){
int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];
int intra_luma_count = s->ac_stats[1][0][level][run][last];
int intra_chroma_count= s->ac_stats[1][1][level][run][last];

if(s->pict_type==AV_PICTURE_TYPE_I){
size += intra_luma_count *rl_length[i ][level][run][last];
chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
}else{
size+= intra_luma_count *rl_length[i ][level][run][last]
+intra_chroma_count*rl_length[i+3][level][run][last]
+inter_count *rl_length[i+3][level][run][last];
}
}
if(last_size == size+chroma_size) break;
}
}
if(size<best_size){
best_size= size;
best= i;
}
if(chroma_size<best_chroma_size){
best_chroma_size= chroma_size;
chroma_best= i;
}
}

// printf("type:%d, best:%d, qp:%d, var:%d, mcvar:%d, size:%d //\n",
// s->pict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size);

if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;

memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);

s->rl_table_index = best;
s->rl_chroma_table_index= chroma_best;

if(s->pict_type != s->last_non_b_pict_type){
s->rl_table_index= 2;
if(s->pict_type==AV_PICTURE_TYPE_I)
s->rl_chroma_table_index= 1;
else
s->rl_chroma_table_index= 2;
}

}

/* write MSMPEG4 compatible frame header */
void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
{
find_best_tables(s);

avpriv_align_put_bits(&s->pb);
put_bits(&s->pb, 2, s->pict_type - 1);

put_bits(&s->pb, 5, s->qscale);
if(s->msmpeg4_version<=2){
s->rl_table_index = 2;
s->rl_chroma_table_index = 2;
}

s->dc_table_index = 1;
s->mv_table_index = 1; /* only if P frame */
s->use_skip_mb_code = 1; /* only if P frame */
s->per_mb_rl_table = 0;
if(s->msmpeg4_version==4)
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);

if (s->pict_type == AV_PICTURE_TYPE_I) {
s->slice_height= s->mb_height/1;
put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);

if(s->msmpeg4_version==4){
ff_msmpeg4_encode_ext_header(s);
if(s->bit_rate>MBAC_BITRATE)
put_bits(&s->pb, 1, s->per_mb_rl_table);
}

if(s->msmpeg4_version>2){
if(!s->per_mb_rl_table){
ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
ff_msmpeg4_code012(&s->pb, s->rl_table_index);
}

put_bits(&s->pb, 1, s->dc_table_index);
}
} else {
put_bits(&s->pb, 1, s->use_skip_mb_code);

if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
put_bits(&s->pb, 1, s->per_mb_rl_table);

if(s->msmpeg4_version>2){
if(!s->per_mb_rl_table)
ff_msmpeg4_code012(&s->pb, s->rl_table_index);

put_bits(&s->pb, 1, s->dc_table_index);

put_bits(&s->pb, 1, s->mv_table_index);
}
}

s->esc3_level_length= 0;
s->esc3_run_length= 0;
}

void ff_msmpeg4_encode_ext_header(MpegEncContext * s)
{
put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29

put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));

if(s->msmpeg4_version>=3)
put_bits(&s->pb, 1, s->flipflop_rounding);
else
assert(s->flipflop_rounding==0);
}

void ff_msmpeg4_encode_motion(MpegEncContext * s,
int mx, int my)
{
int code;
MVTable *mv;

/* modulo encoding */
/* WARNING : you cannot reach all the MVs even with the modulo
encoding. This is a somewhat strange compromise they took !!! */
if (mx <= -64)
mx += 64;
else if (mx >= 64)
mx -= 64;
if (my <= -64)
my += 64;
else if (my >= 64)
my -= 64;

mx += 32;
my += 32;
#if 0
if ((unsigned)mx >= 64 ||
(unsigned)my >= 64)
av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my);
#endif
mv = &ff_mv_tables[s->mv_table_index];

code = mv->table_mv_index[(mx << 6) | my];
put_bits(&s->pb,
mv->table_mv_bits[code],
mv->table_mv_code[code]);
if (code == mv->n) {
/* escape : code literally */
put_bits(&s->pb, 6, mx);
put_bits(&s->pb, 6, my);
}
}

void ff_msmpeg4_handle_slices(MpegEncContext *s){
if (s->mb_x == 0) {
if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
if(s->msmpeg4_version < 4){
ff_mpeg4_clean_buffers(s);
}
s->first_slice_line = 1;
} else {
s->first_slice_line = 0;
}
}
}

static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
{
int range, bit_size, sign, code, bits;

if (val == 0) {
/* zero vector */
code = 0;
put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);
} else {
bit_size = s->f_code - 1;
range = 1 << bit_size;
if (val <= -64)
val += 64;
else if (val >= 64)
val -= 64;

if (val >= 0) {
sign = 0;
} else {
val = -val;
sign = 1;
}
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);

put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);
if (bit_size > 0) {
put_bits(&s->pb, bit_size, bits);
}
}
}

void ff_msmpeg4_encode_mb(MpegEncContext * s,
DCTELEM block[6][64],
int motion_x, int motion_y)
{
int cbp, coded_cbp, i;
int pred_x, pred_y;
uint8_t *coded_block;

ff_msmpeg4_handle_slices(s);

if (!s->mb_intra) {
/* compute cbp */
cbp = 0;
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 0)
cbp |= 1 << (5 - i);
}
if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
/* skip macroblock */
put_bits(&s->pb, 1, 1);
s->last_bits++;
s->misc_bits++;
s->skip_count++;

return;
}
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */

if(s->msmpeg4_version<=2){
put_bits(&s->pb,
ff_v2_mb_type[cbp&3][1],
ff_v2_mb_type[cbp&3][0]);
if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
else coded_cbp= cbp;

put_bits(&s->pb,
ff_h263_cbpy_tab[coded_cbp>>2][1],
ff_h263_cbpy_tab[coded_cbp>>2][0]);

s->misc_bits += get_bits_diff(s);

ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
msmpeg4v2_encode_motion(s, motion_x - pred_x);
msmpeg4v2_encode_motion(s, motion_y - pred_y);
}else{
put_bits(&s->pb,
ff_table_mb_non_intra[cbp + 64][1],
ff_table_mb_non_intra[cbp + 64][0]);

s->misc_bits += get_bits_diff(s);

/* motion vector */
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
ff_msmpeg4_encode_motion(s, motion_x - pred_x,
motion_y - pred_y);
}

s->mv_bits += get_bits_diff(s);

for (i = 0; i < 6; i++) {
ff_msmpeg4_encode_block(s, block[i], i);
}
s->p_tex_bits += get_bits_diff(s);
} else {
/* compute cbp */
cbp = 0;
coded_cbp = 0;
for (i = 0; i < 6; i++) {
int val, pred;
val = (s->block_last_index[i] >= 1);
cbp |= val << (5 - i);
if (i < 4) {
/* predict value for close blocks only for luma */
pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
*coded_block = val;
val = val ^ pred;
}
coded_cbp |= val << (5 - i);
}

if(s->msmpeg4_version<=2){
if (s->pict_type == AV_PICTURE_TYPE_I) {
put_bits(&s->pb,
ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);
} else {
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */
put_bits(&s->pb,
ff_v2_mb_type[(cbp&3) + 4][1],
ff_v2_mb_type[(cbp&3) + 4][0]);
}
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
put_bits(&s->pb,
ff_h263_cbpy_tab[cbp>>2][1],
ff_h263_cbpy_tab[cbp>>2][0]);
}else{
if (s->pict_type == AV_PICTURE_TYPE_I) {
put_bits(&s->pb,
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
} else {
if (s->use_skip_mb_code)
put_bits(&s->pb, 1, 0); /* mb coded */
put_bits(&s->pb,
ff_table_mb_non_intra[cbp][1],
ff_table_mb_non_intra[cbp][0]);
}
put_bits(&s->pb, 1, 0); /* no AC prediction yet */
if(s->inter_intra_pred){
s->h263_aic_dir=0;
put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
}
}
s->misc_bits += get_bits_diff(s);

for (i = 0; i < 6; i++) {
ff_msmpeg4_encode_block(s, block[i], i);
}
s->i_tex_bits += get_bits_diff(s);
s->i_count++;
}
}

static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
{
int sign, code;
int pred, extquant;
int extrabits = 0;

int16_t *dc_val;
pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);

/* update predictor */
if (n < 4) {
*dc_val = level * s->y_dc_scale;
} else {
*dc_val = level * s->c_dc_scale;
}

/* do the prediction */
level -= pred;

if(s->msmpeg4_version<=2){
if (n < 4) {
put_bits(&s->pb,
ff_v2_dc_lum_table[level + 256][1],
ff_v2_dc_lum_table[level + 256][0]);
}else{
put_bits(&s->pb,
ff_v2_dc_chroma_table[level + 256][1],
ff_v2_dc_chroma_table[level + 256][0]);
}
}else{
sign = 0;
if (level < 0) {
level = -level;
sign = 1;
}
code = level;
if (code > DC_MAX)
code = DC_MAX;
else if( s->msmpeg4_version>=6 ) {
if( s->qscale == 1 ) {
extquant = (level + 3) & 0x3;
code = ((level+3)>>2);
} else if( s->qscale == 2 ) {
extquant = (level + 1) & 0x1;
code = ((level+1)>>1);
}
}

if (s->dc_table_index == 0) {
if (n < 4) {
put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
}
} else {
if (n < 4) {
put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
}
}

if(s->msmpeg4_version>=6 && s->qscale<=2)
extrabits = 3 - s->qscale;

if (code == DC_MAX)
put_bits(&s->pb, 8 + extrabits, level);
else if(extrabits > 0)//== VC1 && s->qscale<=2
put_bits(&s->pb, extrabits, extquant);

if (level != 0) {
put_bits(&s->pb, 1, sign);
}
}
}

/* Encoding of a block. Very similar to MPEG4 except for a different
escape coding (same as H263) and more vlc tables.
*/
void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n)
{
int level, run, last, i, j, last_index;
int last_non_zero, sign, slevel;
int code, run_diff, dc_pred_dir;
const RLTable *rl;
const uint8_t *scantable;

if (s->mb_intra) {
msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
i = 1;
if (n < 4) {
rl = &ff_rl_table[s->rl_table_index];
} else {
rl = &ff_rl_table[3 + s->rl_chroma_table_index];
}
run_diff = s->msmpeg4_version>=4;
scantable= s->intra_scantable.permutated;
} else {
i = 0;
rl = &ff_rl_table[3 + s->rl_table_index];
if(s->msmpeg4_version<=2)
run_diff = 0;
else
run_diff = 1;
scantable= s->inter_scantable.permutated;
}

/* recalculate block_last_index for M$ wmv1 */
if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){
for(last_index=63; last_index>=0; last_index--){
if(block[scantable[last_index]]) break;
}
s->block_last_index[n]= last_index;
}else
last_index = s->block_last_index[n];
/* AC coefs */
last_non_zero = i - 1;
for (; i <= last_index; i++) {
j = scantable[i];
level = block[j];
if (level) {
run = i - last_non_zero - 1;
last = (i == last_index);
sign = 0;
slevel = level;
if (level < 0) {
sign = 1;
level = -level;
}

if(level<=MAX_LEVEL && run<=MAX_RUN){
s->ac_stats[s->mb_intra][n>3][level][run][last]++;
}

s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like

code = get_rl_index(rl, last, run, level);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
if (code == rl->n) {
int level1, run1;

level1 = level - rl->max_level[last][run];
if (level1 < 1)
goto esc2;
code = get_rl_index(rl, last, run, level1);
if (code == rl->n) {
esc2:
put_bits(&s->pb, 1, 0);
if (level > MAX_LEVEL)
goto esc3;
run1 = run - rl->max_run[last][level] - run_diff;
if (run1 < 0)
goto esc3;
code = get_rl_index(rl, last, run1+1, level);
if (s->msmpeg4_version == 4 && code == rl->n)
goto esc3;
code = get_rl_index(rl, last, run1, level);
if (code == rl->n) {
esc3:
/* third escape */
put_bits(&s->pb, 1, 0);
put_bits(&s->pb, 1, last);
if(s->msmpeg4_version>=4){
if(s->esc3_level_length==0){
s->esc3_level_length=8;
s->esc3_run_length= 6;
//ESCLVLSZ + ESCRUNSZ
if(s->qscale<8)
put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3);
else
put_bits(&s->pb, 8, 3);
}
put_bits(&s->pb, s->esc3_run_length, run);
put_bits(&s->pb, 1, sign);
put_bits(&s->pb, s->esc3_level_length, level);
}else{
put_bits(&s->pb, 6, run);
put_sbits(&s->pb, 8, slevel);
}
} else {
/* second escape */
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
put_bits(&s->pb, 1, sign);
}
} else {
/* first escape */
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
put_bits(&s->pb, 1, sign);
}
} else {
put_bits(&s->pb, 1, sign);
}
last_non_zero = i;
}
}
}

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