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
22 #include "mpegutils.h"
23 #include "mpegvideo.h"
27 #include "msmpeg4data.h"
32 static void parse_mb_skip(Wmv2Context * w){
34 MpegEncContext * const s= &w->s;
35 uint32_t * const mb_type = s->current_picture_ptr->mb_type;
37 w->skip_type= get_bits(&s->gb, 2);
40 for(mb_y=0; mb_y<s->mb_height; mb_y++){
41 for(mb_x=0; mb_x<s->mb_width; mb_x++){
42 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
47 for(mb_y=0; mb_y<s->mb_height; mb_y++){
48 for(mb_x=0; mb_x<s->mb_width; mb_x++){
49 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
54 for(mb_y=0; mb_y<s->mb_height; mb_y++){
55 if(get_bits1(&s->gb)){
56 for(mb_x=0; mb_x<s->mb_width; mb_x++){
57 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
60 for(mb_x=0; mb_x<s->mb_width; mb_x++){
61 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
67 for(mb_x=0; mb_x<s->mb_width; mb_x++){
68 if(get_bits1(&s->gb)){
69 for(mb_y=0; mb_y<s->mb_height; mb_y++){
70 mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
73 for(mb_y=0; mb_y<s->mb_height; mb_y++){
74 mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
82 static int decode_ext_header(Wmv2Context *w){
83 MpegEncContext * const s= &w->s;
88 if(s->avctx->extradata_size<4) return -1;
90 init_get_bits(&gb, s->avctx->extradata, 32);
92 fps = get_bits(&gb, 5);
93 s->bit_rate = get_bits(&gb, 11)*1024;
94 w->mspel_bit = get_bits1(&gb);
95 s->loop_filter = get_bits1(&gb);
96 w->abt_flag = get_bits1(&gb);
97 w->j_type_bit = get_bits1(&gb);
98 w->top_left_mv_flag= get_bits1(&gb);
99 w->per_mb_rl_bit = get_bits1(&gb);
100 code = get_bits(&gb, 3);
102 if(code==0) return -1;
104 s->slice_height = s->mb_height / code;
106 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
107 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",
108 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,
114 int ff_wmv2_decode_picture_header(MpegEncContext * s)
116 Wmv2Context * const w= (Wmv2Context*)s;
119 if(s->picture_number==0)
120 decode_ext_header(w);
122 s->pict_type = get_bits1(&s->gb) + 1;
123 if(s->pict_type == AV_PICTURE_TYPE_I){
124 code = get_bits(&s->gb, 7);
125 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
127 s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
134 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
136 Wmv2Context * const w= (Wmv2Context*)s;
138 if (s->pict_type == AV_PICTURE_TYPE_I) {
139 if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
140 else w->j_type= 0; //FIXME check
143 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
144 else s->per_mb_rl_table= 0;
146 if(!s->per_mb_rl_table){
147 s->rl_chroma_table_index = decode012(&s->gb);
148 s->rl_table_index = decode012(&s->gb);
151 s->dc_table_index = get_bits1(&s->gb);
153 s->inter_intra_pred= 0;
155 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
156 av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
158 s->rl_chroma_table_index,
169 cbp_index= decode012(&s->gb);
172 w->cbp_table_index= map[cbp_index];
173 }else if(s->qscale <= 20){
175 w->cbp_table_index= map[cbp_index];
178 w->cbp_table_index= map[cbp_index];
181 if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
182 else s->mspel= 0; //FIXME check
185 w->per_mb_abt= get_bits1(&s->gb)^1;
187 w->abt_type= decode012(&s->gb);
191 if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
192 else s->per_mb_rl_table= 0;
194 if(!s->per_mb_rl_table){
195 s->rl_table_index = decode012(&s->gb);
196 s->rl_chroma_table_index = s->rl_table_index;
199 s->dc_table_index = get_bits1(&s->gb);
200 s->mv_table_index = get_bits1(&s->gb);
202 s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
205 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
206 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",
208 s->rl_chroma_table_index,
217 s->inter_intra_pred);
220 s->esc3_level_length= 0;
221 s->esc3_run_length= 0;
223 s->picture_number++; //FIXME ?
227 ff_intrax8_decode_picture(&w->x8, 2*s->qscale, (s->qscale-1)|1 );
234 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
235 MpegEncContext * const s= &w->s;
238 ret= ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
242 if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
243 w->hshift= get_bits1(&s->gb);
250 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
251 MpegEncContext * const s= &w->s;
252 int xy, wrap, diff, type;
253 int16_t *A, *B, *C, *mot_val;
256 xy = s->block_index[0];
258 mot_val = s->current_picture.motion_val[0][xy];
260 A = s->current_picture.motion_val[0][xy - 1];
261 B = s->current_picture.motion_val[0][xy - wrap];
262 C = s->current_picture.motion_val[0][xy + 2 - wrap];
264 if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
265 diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
270 type= get_bits1(&s->gb);
281 /* special case for first (slice) line */
282 if (s->first_slice_line) {
286 *px = mid_pred(A[0], B[0], C[0]);
287 *py = mid_pred(A[1], B[1], C[1]);
294 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, int n, int cbp){
295 MpegEncContext * const s= &w->s;
296 static const int sub_cbp_table[3]= {2,3,1};
300 s->block_last_index[n] = -1;
306 w->abt_type= decode012(&s->gb);
307 w->abt_type_table[n]= w->abt_type;
310 // const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
311 const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
312 // const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
314 sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
317 if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
322 if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
325 s->block_last_index[n] = 63;
329 return ff_msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
334 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
336 Wmv2Context * const w= (Wmv2Context*)s;
340 if(w->j_type) return 0;
342 if (s->pict_type == AV_PICTURE_TYPE_P) {
343 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
347 s->block_last_index[i] = -1;
348 s->mv_dir = MV_DIR_FORWARD;
349 s->mv_type = MV_TYPE_16X16;
357 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
360 s->mb_intra = (~code & 0x40) >> 6;
365 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
367 av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
370 /* predict coded block pattern */
373 int val = ((code >> (5 - i)) & 1);
375 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
379 cbp |= val << (5 - i);
385 wmv2_pred_motion(w, &mx, &my);
388 s->dsp.clear_blocks(s->block[0]);
389 if(s->per_mb_rl_table){
390 s->rl_table_index = decode012(&s->gb);
391 s->rl_chroma_table_index = s->rl_table_index;
394 if(w->abt_flag && w->per_mb_abt){
395 w->per_block_abt= get_bits1(&s->gb);
396 if(!w->per_block_abt)
397 w->abt_type= decode012(&s->gb);
402 if (wmv2_decode_motion(w, &mx, &my) < 0)
405 s->mv_dir = MV_DIR_FORWARD;
406 s->mv_type = MV_TYPE_16X16;
410 for (i = 0; i < 6; i++) {
411 if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
413 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
418 if (s->pict_type==AV_PICTURE_TYPE_P)
419 av_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
420 av_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
421 ((cbp & 3) ? 1 : 0) +((cbp & 0x3C)? 2 : 0),
422 show_bits(&s->gb, 24));
423 s->ac_pred = get_bits1(&s->gb);
424 if(s->inter_intra_pred){
425 s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
426 av_dlog(s->avctx, "%d%d %d %d/",
427 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
429 if(s->per_mb_rl_table && cbp){
430 s->rl_table_index = decode012(&s->gb);
431 s->rl_chroma_table_index = s->rl_table_index;
434 s->dsp.clear_blocks(s->block[0]);
435 for (i = 0; i < 6; i++) {
436 if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
438 av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
447 static av_cold int wmv2_decode_init(AVCodecContext *avctx){
448 Wmv2Context * const w= avctx->priv_data;
450 avctx->flags |= CODEC_FLAG_EMU_EDGE;
452 if(ff_msmpeg4_decode_init(avctx) < 0)
455 ff_wmv2_common_init(w);
457 ff_intrax8_common_init(&w->x8,&w->s);
462 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
464 Wmv2Context *w = avctx->priv_data;
466 ff_intrax8_common_end(&w->x8);
467 return ff_h263_decode_end(avctx);
470 AVCodec ff_wmv2_decoder = {
472 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
473 .type = AVMEDIA_TYPE_VIDEO,
474 .id = AV_CODEC_ID_WMV2,
475 .priv_data_size = sizeof(Wmv2Context),
476 .init = wmv2_decode_init,
477 .close = wmv2_decode_end,
478 .decode = ff_h263_decode_frame,
479 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
480 .pix_fmts = (const enum AVPixelFormat[]) {