mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 18:17:06 +00:00
487 lines
14 KiB
C
487 lines
14 KiB
C
/*
|
|
* Copyright (c) 2002 The FFmpeg Project
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "mpegvideo.h"
|
|
#include "h263.h"
|
|
#include "mathops.h"
|
|
#include "msmpeg4.h"
|
|
#include "msmpeg4data.h"
|
|
#include "intrax8.h"
|
|
#include "wmv2.h"
|
|
|
|
|
|
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, 32);
|
|
|
|
fps = get_bits(&gb, 5);
|
|
s->bit_rate = get_bits(&gb, 11)*1024;
|
|
w->mspel_bit = get_bits1(&gb);
|
|
s->loop_filter = 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, loop_filter:%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, s->loop_filter,
|
|
code);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_wmv2_decode_picture_header(MpegEncContext * s)
|
|
{
|
|
Wmv2Context * const w= (Wmv2Context*)s;
|
|
int code;
|
|
|
|
if(s->picture_number==0)
|
|
decode_ext_header(w);
|
|
|
|
s->pict_type = get_bits1(&s->gb) + 1;
|
|
if(s->pict_type == AV_PICTURE_TYPE_I){
|
|
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 == AV_PICTURE_TYPE_I) {
|
|
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){
|
|
ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 );
|
|
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= ff_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(FFABS(A[0] - B[0]), FFABS(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);
|
|
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 (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
|
|
return -1;
|
|
}
|
|
|
|
if(sub_cbp&2){
|
|
if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
|
|
return -1;
|
|
}
|
|
s->block_last_index[n] = 63;
|
|
|
|
return 0;
|
|
}else{
|
|
return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
|
|
}
|
|
}
|
|
|
|
|
|
int ff_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 == AV_PICTURE_TYPE_P) {
|
|
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, ff_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 = ff_msmpeg4_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==AV_PICTURE_TYPE_P)
|
|
// 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, ff_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 (ff_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 av_cold int wmv2_decode_init(AVCodecContext *avctx){
|
|
Wmv2Context * const w= avctx->priv_data;
|
|
|
|
if(avctx->idct_algo==FF_IDCT_AUTO){
|
|
avctx->idct_algo=FF_IDCT_WMV2;
|
|
}
|
|
|
|
if(ff_msmpeg4_decode_init(avctx) < 0)
|
|
return -1;
|
|
|
|
ff_wmv2_common_init(w);
|
|
|
|
ff_intrax8_common_init(&w->x8,&w->s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int wmv2_decode_end(AVCodecContext *avctx)
|
|
{
|
|
Wmv2Context *w = avctx->priv_data;
|
|
|
|
ff_intrax8_common_end(&w->x8);
|
|
return ff_h263_decode_end(avctx);
|
|
}
|
|
|
|
AVCodec ff_wmv2_decoder = {
|
|
"wmv2",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_WMV2,
|
|
sizeof(Wmv2Context),
|
|
wmv2_decode_init,
|
|
NULL,
|
|
wmv2_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
.max_lowres = 3,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
|
|
.pix_fmts= ff_pixfmt_list_420,
|
|
};
|