2 * Copyright (c) 2002 The FFmpeg Project.
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "mpegvideo.h"
25 #include "msmpeg4data.h"
30 static void parse_mb_skip(Wmv2Context * w){
32 MpegEncContext * const s= &w->s;
33 uint32_t * const mb_type= s->current_picture_ptr->mb_type;
35 w->skip_type= get_bits(&s->gb, 2);
38 for(mb_y=0; mb_y<s->mb_height; mb_y++){
39 for(mb_x=0; mb_x<s->mb_width; mb_x++){
40 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
45 for(mb_y=0; mb_y<s->mb_height; mb_y++){
46 for(mb_x=0; mb_x<s->mb_width; mb_x++){
47 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
52 for(mb_y=0; mb_y<s->mb_height; mb_y++){
53 if(get_bits1(&s->gb)){
54 for(mb_x=0; mb_x<s->mb_width; mb_x++){
55 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
58 for(mb_x=0; mb_x<s->mb_width; mb_x++){
59 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
65 for(mb_x=0; mb_x<s->mb_width; mb_x++){
66 if(get_bits1(&s->gb)){
67 for(mb_y=0; mb_y<s->mb_height; mb_y++){
68 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
71 for(mb_y=0; mb_y<s->mb_height; mb_y++){
72 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
80 static int decode_ext_header(Wmv2Context *w){
81 MpegEncContext * const s= &w->s;
86 if(s->avctx->extradata_size<4) return -1;
88 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
90 fps = get_bits(&gb, 5);
91 s->bit_rate = get_bits(&gb, 11)*1024;
92 w->mspel_bit = get_bits1(&gb);
93 s->loop_filter = get_bits1(&gb);
94 w->abt_flag = get_bits1(&gb);
95 w->j_type_bit = get_bits1(&gb);
96 w->top_left_mv_flag= get_bits1(&gb);
97 w->per_mb_rl_bit = get_bits1(&gb);
98 code = get_bits(&gb, 3);
100 if(code==0) return -1;
102 s->slice_height = s->mb_height / code;
104 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
105 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",
106 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,
112 int ff_wmv2_decode_picture_header(MpegEncContext * s)
114 Wmv2Context * const w= (Wmv2Context*)s;
120 for(i=0; i<s->gb.size*8; i++)
121 printf("%d", get_bits1(&s->gb));
122 // get_bits1(&s->gb);
127 if(s->picture_number==0)
128 decode_ext_header(w);
130 s->pict_type = get_bits1(&s->gb) + 1;
131 if(s->pict_type == FF_I_TYPE){
132 code = get_bits(&s->gb, 7);
133 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
135 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
142 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
144 Wmv2Context * const w= (Wmv2Context*)s;
146 if (s->pict_type == FF_I_TYPE) {
147 if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
148 else w->j_type= 0; //FIXME check
151 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
152 else s->per_mb_rl_table= 0;
154 if(!s->per_mb_rl_table){
155 s->rl_chroma_table_index = decode012(&s->gb);
156 s->rl_table_index = decode012(&s->gb);
159 s->dc_table_index = get_bits1(&s->gb);
161 s->inter_intra_pred= 0;
163 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
164 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
166 s->rl_chroma_table_index,
177 cbp_index= decode012(&s->gb);
180 w->cbp_table_index= map[cbp_index];
181 }else if(s->qscale <= 20){
183 w->cbp_table_index= map[cbp_index];
186 w->cbp_table_index= map[cbp_index];
189 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
190 else s->mspel= 0; //FIXME check
193 w->per_mb_abt= get_bits1(&s->gb)^1;
195 w->abt_type= decode012(&s->gb);
199 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
200 else s->per_mb_rl_table= 0;
202 if(!s->per_mb_rl_table){
203 s->rl_table_index = decode012(&s->gb);
204 s->rl_chroma_table_index = s->rl_table_index;
207 s->dc_table_index = get_bits1(&s->gb);
208 s->mv_table_index = get_bits1(&s->gb);
210 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
213 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
214 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",
216 s->rl_chroma_table_index,
225 s->inter_intra_pred);
228 s->esc3_level_length= 0;
229 s->esc3_run_length= 0;
231 s->picture_number++; //FIXME ?
235 ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 );
242 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
243 MpegEncContext * const s= &w->s;
246 ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
250 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
251 w->hshift= get_bits1(&s->gb);
255 //printf("%d %d ", *mx_ptr, *my_ptr);
260 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
261 MpegEncContext * const s= &w->s;
262 int xy, wrap, diff, type;
263 int16_t *A, *B, *C, *mot_val;
266 xy = s->block_index[0];
268 mot_val = s->current_picture.motion_val[0][xy];
270 A = s->current_picture.motion_val[0][xy - 1];
271 B = s->current_picture.motion_val[0][xy - wrap];
272 C = s->current_picture.motion_val[0][xy + 2 - wrap];
274 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
275 diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
280 type= get_bits1(&s->gb);
291 /* special case for first (slice) line */
292 if (s->first_slice_line) {
296 *px = mid_pred(A[0], B[0], C[0]);
297 *py = mid_pred(A[1], B[1], C[1]);
304 static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
305 MpegEncContext * const s= &w->s;
306 static const int sub_cbp_table[3]= {2,3,1};
310 s->block_last_index[n] = -1;
316 w->abt_type= decode012(&s->gb);
319 printf("B%d", w->abt_type);
321 w->abt_type_table[n]= w->abt_type;
324 // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
325 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
326 // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
328 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
329 // printf("S%d", sub_cbp);
332 if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
337 if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
340 s->block_last_index[n] = 63;
344 return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
349 int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
351 Wmv2Context * const w= (Wmv2Context*)s;
355 if(w->j_type) return 0;
357 if (s->pict_type == FF_P_TYPE) {
358 if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
362 s->block_last_index[i] = -1;
363 s->mv_dir = MV_DIR_FORWARD;
364 s->mv_type = MV_TYPE_16X16;
372 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
375 s->mb_intra = (~code & 0x40) >> 6;
380 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
382 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
385 /* predict coded block pattern */
388 int val = ((code >> (5 - i)) & 1);
390 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
394 cbp |= val << (5 - i);
400 //printf("P at %d %d\n", s->mb_x, s->mb_y);
401 wmv2_pred_motion(w, &mx, &my);
404 s->dsp.clear_blocks(s->block[0]);
405 if(s->per_mb_rl_table){
406 s->rl_table_index = decode012(&s->gb);
407 s->rl_chroma_table_index = s->rl_table_index;
410 if(w->abt_flag && w->per_mb_abt){
411 w->per_block_abt= get_bits1(&s->gb);
412 if(!w->per_block_abt)
413 w->abt_type= decode012(&s->gb);
418 if (wmv2_decode_motion(w, &mx, &my) < 0)
421 s->mv_dir = MV_DIR_FORWARD;
422 s->mv_type = MV_TYPE_16X16;
426 for (i = 0; i < 6; i++) {
427 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
429 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
434 //if(s->pict_type==FF_P_TYPE)
435 // printf("%d%d ", s->inter_intra_pred, cbp);
436 //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));
437 s->ac_pred = get_bits1(&s->gb);
438 if(s->inter_intra_pred){
439 s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
440 // printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
442 if(s->per_mb_rl_table && cbp){
443 s->rl_table_index = decode012(&s->gb);
444 s->rl_chroma_table_index = s->rl_table_index;
447 s->dsp.clear_blocks(s->block[0]);
448 for (i = 0; i < 6; i++) {
449 if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
451 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
460 static av_cold int wmv2_decode_init(AVCodecContext *avctx){
461 Wmv2Context * const w= avctx->priv_data;
463 if(avctx->idct_algo==FF_IDCT_AUTO){
464 avctx->idct_algo=FF_IDCT_WMV2;
467 if(ff_h263_decode_init(avctx) < 0)
470 ff_wmv2_common_init(w);
472 ff_intrax8_common_init(&w->x8,&w->s);
477 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
479 Wmv2Context *w = avctx->priv_data;
481 ff_intrax8_common_end(&w->x8);
482 return ff_h263_decode_end(avctx);
485 AVCodec wmv2_decoder = {
493 ff_h263_decode_frame,
494 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
495 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),