virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity
f07e8487b0
FFmpeg/libavcodec/wmv2.c
Michael Niedermayer a7702890bd remove STATS code (probably hasnt been used for years ..., and its not completely clear what it was good for anyway) 
Originally committed as revision 5689 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-07-09 10:33:49 +00:00

853 lines
25 KiB
C
Raw Blame History

/*
* Copyright (c) 2002 The FFmpeg Project.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/**
* @file wmv2.c
* wmv2 codec.
*/
#include "simple_idct.h"
#define SKIP_TYPE_NONE 0
#define SKIP_TYPE_MPEG 1
#define SKIP_TYPE_ROW 2
#define SKIP_TYPE_COL 3
typedef struct Wmv2Context{
MpegEncContext s;
int j_type_bit;
int j_type;
int flag3;
int flag63;
int abt_flag;
int abt_type;
int abt_type_table[6];
int per_mb_abt;
int per_block_abt;
int mspel_bit;
int cbp_table_index;
int top_left_mv_flag;
int per_mb_rl_bit;
int skip_type;
int hshift;
ScanTable abt_scantable[2];
DECLARE_ALIGNED_8(DCTELEM, abt_block2[6][64]);
}Wmv2Context;
static void wmv2_common_init(Wmv2Context * w){
MpegEncContext * const s= &w->s;
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
}
#ifdef CONFIG_ENCODERS
static int encode_ext_header(Wmv2Context *w){
MpegEncContext * const s= &w->s;
PutBitContext pb;
int code;
init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
put_bits(&pb, 1, w->mspel_bit=1);
put_bits(&pb, 1, w->flag3=1);
put_bits(&pb, 1, w->abt_flag=1);
put_bits(&pb, 1, w->j_type_bit=1);
put_bits(&pb, 1, w->top_left_mv_flag=0);
put_bits(&pb, 1, w->per_mb_rl_bit=1);
put_bits(&pb, 3, code=1);
flush_put_bits(&pb);
s->slice_height = s->mb_height / code;
return 0;
}
static int wmv2_encode_init(AVCodecContext *avctx){
Wmv2Context * const w= avctx->priv_data;
if(MPV_encode_init(avctx) < 0)
return -1;
wmv2_common_init(w);
avctx->extradata_size= 4;
avctx->extradata= av_mallocz(avctx->extradata_size + 10);
encode_ext_header(w);
return 0;
}
#if 0 /* unused, remove? */
static int wmv2_encode_end(AVCodecContext *avctx){
if(MPV_encode_end(avctx) < 0)
return -1;
avctx->extradata_size= 0;
av_freep(&avctx->extradata);
return 0;
}
#endif
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
{
Wmv2Context * const w= (Wmv2Context*)s;
put_bits(&s->pb, 1, s->pict_type - 1);
if(s->pict_type == I_TYPE){
put_bits(&s->pb, 7, 0);
}
put_bits(&s->pb, 5, s->qscale);
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;
s->mspel= 0;
w->per_mb_abt=0;
w->abt_type=0;
w->j_type=0;
assert(s->flipflop_rounding);
if (s->pict_type == I_TYPE) {
assert(s->no_rounding==1);
if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
if(!s->per_mb_rl_table){
code012(&s->pb, s->rl_chroma_table_index);
code012(&s->pb, s->rl_table_index);
}
put_bits(&s->pb, 1, s->dc_table_index);
s->inter_intra_pred= 0;
}else{
int cbp_index;
put_bits(&s->pb, 2, SKIP_TYPE_NONE);
code012(&s->pb, cbp_index=0);
if(s->qscale <= 10){
int map[3]= {0,2,1};
w->cbp_table_index= map[cbp_index];
}else if(s->qscale <= 20){
int map[3]= {1,0,2};
w->cbp_table_index= map[cbp_index];
}else{
int map[3]= {2,1,0};
w->cbp_table_index= map[cbp_index];
}
if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
if(w->abt_flag){
put_bits(&s->pb, 1, w->per_mb_abt^1);
if(!w->per_mb_abt){
code012(&s->pb, w->abt_type);
}
}
if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
if(!s->per_mb_rl_table){
code012(&s->pb, s->rl_table_index);
s->rl_chroma_table_index = s->rl_table_index;
}
put_bits(&s->pb, 1, s->dc_table_index);
put_bits(&s->pb, 1, s->mv_table_index);
s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
}
s->esc3_level_length= 0;
s->esc3_run_length= 0;
return 0;
}
// nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
// its duplicated here in case someone wants to add support for these carp features
void ff_wmv2_encode_mb(MpegEncContext * s,
DCTELEM block[6][64],
int motion_x, int motion_y)
{
Wmv2Context * const w= (Wmv2Context*)s;
int cbp, coded_cbp, i;
int pred_x, pred_y;
uint8_t *coded_block;
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);
}
put_bits(&s->pb,
wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
/* motion vector */
h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
msmpeg4_encode_motion(s, motion_x - pred_x,
motion_y - pred_y);
} 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 = coded_block_pred(s, i, &coded_block);
*coded_block = val;
val = val ^ pred;
}
coded_cbp |= val << (5 - i);
}
#if 0
if (coded_cbp)
printf("cbp=%x %x\n", cbp, coded_cbp);
#endif
if (s->pict_type == I_TYPE) {
put_bits(&s->pb,
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
} else {
put_bits(&s->pb,
wmv2_inter_table[w->cbp_table_index][cbp][1],
wmv2_inter_table[w->cbp_table_index][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, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
}
}
for (i = 0; i < 6; i++) {
msmpeg4_encode_block(s, block[i], i);
}
}
#endif //CONFIG_ENCODERS
static void parse_mb_skip(Wmv2Context * w){
int mb_x, mb_y;
MpegEncContext * const s= &w->s;
uint32_t * const mb_type= s->current_picture_ptr->mb_type;
w->skip_type= get_bits(&s->gb, 2);
switch(w->skip_type){
case SKIP_TYPE_NONE:
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
}
}
break;
case SKIP_TYPE_MPEG:
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
}
}
break;
case SKIP_TYPE_ROW:
for(mb_y=0; mb_y<s->mb_height; mb_y++){
if(get_bits1(&s->gb)){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
}
}else{
for(mb_x=0; mb_x<s->mb_width; mb_x++){
mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
}
}
}
break;
case SKIP_TYPE_COL:
for(mb_x=0; mb_x<s->mb_width; mb_x++){
if(get_bits1(&s->gb)){
for(mb_y=0; mb_y<s->mb_height; mb_y++){
mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
}
}else{
for(mb_y=0; mb_y<s->mb_height; mb_y++){
mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
}
}
}
break;
}
}
static int decode_ext_header(Wmv2Context *w){
MpegEncContext * const s= &w->s;
GetBitContext gb;
int fps;
int code;
if(s->avctx->extradata_size<4) return -1;
init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
fps = get_bits(&gb, 5);
s->bit_rate = get_bits(&gb, 11)*1024;
w->mspel_bit = get_bits1(&gb);
w->flag3 = get_bits1(&gb);
w->abt_flag = get_bits1(&gb);
w->j_type_bit = get_bits1(&gb);
w->top_left_mv_flag= get_bits1(&gb);
w->per_mb_rl_bit = get_bits1(&gb);
code = get_bits(&gb, 3);
if(code==0) return -1;
s->slice_height = s->mb_height / code;
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, tl_mv_flag:%d, mbrl_bit:%d, code:%d, flag3:%d, slices:%d\n",
fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, w->top_left_mv_flag, w->per_mb_rl_bit, code, w->flag3,
code);
}
return 0;
}
int ff_wmv2_decode_picture_header(MpegEncContext * s)
{
Wmv2Context * const w= (Wmv2Context*)s;
int code;
#if 0
{
int i;
for(i=0; i<s->gb.size*8; i++)
printf("%d", get_bits1(&s->gb));
// get_bits1(&s->gb);
printf("END\n");
return -1;
}
#endif
if(s->picture_number==0)
decode_ext_header(w);
s->pict_type = get_bits(&s->gb, 1) + 1;
if(s->pict_type == I_TYPE){
code = get_bits(&s->gb, 7);
av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
}
s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
if(s->qscale < 0)
return -1;
return 0;
}
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
{
Wmv2Context * const w= (Wmv2Context*)s;
if (s->pict_type == I_TYPE) {
if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
else w->j_type= 0; //FIXME check
if(!w->j_type){
if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
else s->per_mb_rl_table= 0;
if(!s->per_mb_rl_table){
s->rl_chroma_table_index = decode012(&s->gb);
s->rl_table_index = decode012(&s->gb);
}
s->dc_table_index = get_bits1(&s->gb);
}
s->inter_intra_pred= 0;
s->no_rounding = 1;
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
s->qscale,
s->rl_chroma_table_index,
s->rl_table_index,
s->dc_table_index,
s->per_mb_rl_table,
w->j_type);
}
}else{
int cbp_index;
w->j_type=0;
parse_mb_skip(w);
cbp_index= decode012(&s->gb);
if(s->qscale <= 10){
int map[3]= {0,2,1};
w->cbp_table_index= map[cbp_index];
}else if(s->qscale <= 20){
int map[3]= {1,0,2};
w->cbp_table_index= map[cbp_index];
}else{
int map[3]= {2,1,0};
w->cbp_table_index= map[cbp_index];
}
if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
else s->mspel= 0; //FIXME check
if(w->abt_flag){
w->per_mb_abt= get_bits1(&s->gb)^1;
if(!w->per_mb_abt){
w->abt_type= decode012(&s->gb);
}
}
if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
else s->per_mb_rl_table= 0;
if(!s->per_mb_rl_table){
s->rl_table_index = decode012(&s->gb);
s->rl_chroma_table_index = s->rl_table_index;
}
s->dc_table_index = get_bits1(&s->gb);
s->mv_table_index = get_bits1(&s->gb);
s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
s->no_rounding ^= 1;
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
s->rl_table_index,
s->rl_chroma_table_index,
s->dc_table_index,
s->mv_table_index,
s->per_mb_rl_table,
s->qscale,
s->mspel,
w->per_mb_abt,
w->abt_type,
w->cbp_table_index,
s->inter_intra_pred);
}
}
s->esc3_level_length= 0;
s->esc3_run_length= 0;
s->picture_number++; //FIXME ?
// if(w->j_type)
// return wmv2_decode_j_picture(w); //FIXME
if(w->j_type){
av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
return -1;
}
return 0;
}
static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
MpegEncContext * const s= &w->s;
int ret;
ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
if(ret<0) return -1;
if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
w->hshift= get_bits1(&s->gb);
else
w->hshift= 0;
//printf("%d %d ", *mx_ptr, *my_ptr);
return 0;
}
static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
MpegEncContext * const s= &w->s;
int xy, wrap, diff, type;
int16_t *A, *B, *C, *mot_val;
wrap = s->b8_stride;
xy = s->block_index[0];
mot_val = s->current_picture.motion_val[0][xy];
A = s->current_picture.motion_val[0][xy - 1];
B = s->current_picture.motion_val[0][xy - wrap];
C = s->current_picture.motion_val[0][xy + 2 - wrap];
if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
else
diff=0;
if(diff >= 8)
type= get_bits1(&s->gb);
else
type= 2;
if(type == 0){
*px= A[0];
*py= A[1];
}else if(type == 1){
*px= B[0];
*py= B[1];
}else{
/* special case for first (slice) line */
if (s->first_slice_line) {
*px = A[0];
*py = A[1];
} else {
*px = mid_pred(A[0], B[0], C[0]);
*py = mid_pred(A[1], B[1], C[1]);
}
}
return mot_val;
}
static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
MpegEncContext * const s= &w->s;
static const int sub_cbp_table[3]= {2,3,1};
int sub_cbp;
if(!cbp){
s->block_last_index[n] = -1;
return 0;
}
if(w->per_block_abt)
w->abt_type= decode012(&s->gb);
#if 0
if(w->per_block_abt)
printf("B%d", w->abt_type);
#endif
w->abt_type_table[n]= w->abt_type;
if(w->abt_type){
// const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
// const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
// printf("S%d", sub_cbp);
if(sub_cbp&1){
if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
return -1;
}
if(sub_cbp&2){
if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
return -1;
}
s->block_last_index[n] = 63;
return 0;
}else{
return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
}
}
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
MpegEncContext * const s= &w->s;
if (s->block_last_index[n] >= 0) {
switch(w->abt_type_table[n]){
case 0:
s->dsp.idct_add (dst, stride, block1);
break;
case 1:
simple_idct84_add(dst , stride, block1);
simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
break;
case 2:
simple_idct48_add(dst , stride, block1);
simple_idct48_add(dst + 4 , stride, w->abt_block2[n]);
memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
}
}
}
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
Wmv2Context * const w= (Wmv2Context*)s;
wmv2_add_block(w, block1[0], dest_y , s->linesize, 0);
wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1);
wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2);
wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
if(s->flags&CODEC_FLAG_GRAY) return;
wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
}
void ff_mspel_motion(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
int motion_x, int motion_y, int h)
{
Wmv2Context * const w= (Wmv2Context*)s;
uint8_t *ptr;
int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
int emu=0;
dxy = ((motion_y & 1) << 1) | (motion_x & 1);
dxy = 2*dxy + w->hshift;
src_x = s->mb_x * 16 + (motion_x >> 1);
src_y = s->mb_y * 16 + (motion_y >> 1);
/* WARNING: do no forget half pels */
v_edge_pos = s->v_edge_pos;
src_x = clip(src_x, -16, s->width);
src_y = clip(src_y, -16, s->height);
linesize = s->linesize;
uvlinesize = s->uvlinesize;
ptr = ref_picture[0] + (src_y * linesize) + src_x;
if(s->flags&CODEC_FLAG_EMU_EDGE){
if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos
|| src_y + h+1 >= v_edge_pos){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
ptr= s->edge_emu_buffer + 1 + s->linesize;
emu=1;
}
}
s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize);
s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize);
s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize);
s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
if(s->flags&CODEC_FLAG_GRAY) return;
if (s->out_format == FMT_H263) {
dxy = 0;
if ((motion_x & 3) != 0)
dxy |= 1;
if ((motion_y & 3) != 0)
dxy |= 2;
mx = motion_x >> 2;
my = motion_y >> 2;
} else {
mx = motion_x / 2;
my = motion_y / 2;
dxy = ((my & 1) << 1) | (mx & 1);
mx >>= 1;
my >>= 1;
}
src_x = s->mb_x * 8 + mx;
src_y = s->mb_y * 8 + my;
src_x = clip(src_x, -8, s->width >> 1);
if (src_x == (s->width >> 1))
dxy &= ~1;
src_y = clip(src_y, -8, s->height >> 1);
if (src_y == (s->height >> 1))
dxy &= ~2;
offset = (src_y * uvlinesize) + src_x;
ptr = ref_picture[1] + offset;
if(emu){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
ptr= s->edge_emu_buffer;
}
pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
ptr = ref_picture[2] + offset;
if(emu){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
ptr= s->edge_emu_buffer;
}
pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
}
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
{
Wmv2Context * const w= (Wmv2Context*)s;
int cbp, code, i;
uint8_t *coded_val;
if(w->j_type) return 0;
if (s->pict_type == P_TYPE) {
if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
/* skip mb */
s->mb_intra = 0;
for(i=0;i<6;i++)
s->block_last_index[i] = -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
s->mv[0][0][0] = 0;
s->mv[0][0][1] = 0;
s->mb_skipped = 1;
w->hshift=0;
return 0;
}
code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
if (code < 0)
return -1;
s->mb_intra = (~code & 0x40) >> 6;
cbp = code & 0x3f;
} else {
s->mb_intra = 1;
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
if (code < 0){
av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
/* predict coded block pattern */
cbp = 0;
for(i=0;i<6;i++) {
int val = ((code >> (5 - i)) & 1);
if (i < 4) {
int pred = coded_block_pred(s, i, &coded_val);
val = val ^ pred;
*coded_val = val;
}
cbp |= val << (5 - i);
}
}
if (!s->mb_intra) {
int mx, my;
//printf("P at %d %d\n", s->mb_x, s->mb_y);
wmv2_pred_motion(w, &mx, &my);
if(cbp){
s->dsp.clear_blocks(s->block[0]);
if(s->per_mb_rl_table){
s->rl_table_index = decode012(&s->gb);
s->rl_chroma_table_index = s->rl_table_index;
}
if(w->abt_flag && w->per_mb_abt){
w->per_block_abt= get_bits1(&s->gb);
if(!w->per_block_abt)
w->abt_type= decode012(&s->gb);
}else
w->per_block_abt=0;
}
if (wmv2_decode_motion(w, &mx, &my) < 0)
return -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
s->mv[0][0][0] = mx;
s->mv[0][0][1] = my;
for (i = 0; i < 6; i++) {
if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
{
av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
return -1;
}
}
} else {
//if(s->pict_type==P_TYPE)
// printf("%d%d ", s->inter_intra_pred, cbp);
//printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
s->ac_pred = get_bits1(&s->gb);
if(s->inter_intra_pred){
s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
}
if(s->per_mb_rl_table && cbp){
s->rl_table_index = decode012(&s->gb);
s->rl_chroma_table_index = s->rl_table_index;
}
s->dsp.clear_blocks(s->block[0]);
for (i = 0; i < 6; i++) {
if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
{
av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
return -1;
}
}
}
return 0;
}
static int wmv2_decode_init(AVCodecContext *avctx){
Wmv2Context * const w= avctx->priv_data;
if(ff_h263_decode_init(avctx) < 0)
return -1;
wmv2_common_init(w);
return 0;
}
AVCodec wmv2_decoder = {
"wmv2",
CODEC_TYPE_VIDEO,
CODEC_ID_WMV2,
sizeof(Wmv2Context),
wmv2_decode_init,
NULL,
ff_h263_decode_end,
ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
};
#ifdef CONFIG_ENCODERS
AVCodec wmv2_encoder = {
"wmv2",
CODEC_TYPE_VIDEO,
CODEC_ID_WMV2,
sizeof(Wmv2Context),
wmv2_encode_init,
MPV_encode_picture,
MPV_encode_end,
};
#endif
Reference in New Issue View Git Blame Copy Permalink