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ffmpeg / libavcodec / mpeg12.c @ ce5e49b0

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1
/*
2
 * MPEG-1/2 decoder
3
 * Copyright (c) 2000,2001 Fabrice Bellard
4
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
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 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
/**
24
 * @file
25
 * MPEG-1/2 decoder
26
 */
27

    
28
//#define DEBUG
29
#include "internal.h"
30
#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
33

    
34
#include "mpeg12.h"
35
#include "mpeg12data.h"
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#include "mpeg12decdata.h"
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#include "bytestream.h"
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#include "vdpau_internal.h"
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#include "xvmc_internal.h"
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#include "thread.h"
41

    
42
//#undef NDEBUG
43
//#include <assert.h>
44

    
45

    
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#define MV_VLC_BITS 9
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#define MBINCR_VLC_BITS 9
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#define MB_PAT_VLC_BITS 9
49
#define MB_PTYPE_VLC_BITS 6
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#define MB_BTYPE_VLC_BITS 6
51

    
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static inline int mpeg1_decode_block_intra(MpegEncContext *s,
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                              DCTELEM *block,
54
                              int n);
55
static inline int mpeg1_decode_block_inter(MpegEncContext *s,
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                              DCTELEM *block,
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                              int n);
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static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
59
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
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                                        DCTELEM *block,
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                                        int n);
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static inline int mpeg2_decode_block_intra(MpegEncContext *s,
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                                    DCTELEM *block,
64
                                    int n);
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static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
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static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
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static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
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static void exchange_uv(MpegEncContext *s);
69

    
70
uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
71

    
72

    
73
#define INIT_2D_VLC_RL(rl, static_size)\
74
{\
75
    static RL_VLC_ELEM rl_vlc_table[static_size];\
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    INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
77
             &rl.table_vlc[0][1], 4, 2,\
78
             &rl.table_vlc[0][0], 4, 2, static_size);\
79
\
80
    rl.rl_vlc[0]= rl_vlc_table;\
81
    init_2d_vlc_rl(&rl);\
82
}
83

    
84
static void init_2d_vlc_rl(RLTable *rl)
85
{
86
    int i;
87

    
88
    for(i=0; i<rl->vlc.table_size; i++){
89
        int code= rl->vlc.table[i][0];
90
        int len = rl->vlc.table[i][1];
91
        int level, run;
92

    
93
        if(len==0){ // illegal code
94
            run= 65;
95
            level= MAX_LEVEL;
96
        }else if(len<0){ //more bits needed
97
            run= 0;
98
            level= code;
99
        }else{
100
            if(code==rl->n){ //esc
101
                run= 65;
102
                level= 0;
103
            }else if(code==rl->n+1){ //eob
104
                run= 0;
105
                level= 127;
106
            }else{
107
                run=   rl->table_run  [code] + 1;
108
                level= rl->table_level[code];
109
            }
110
        }
111
        rl->rl_vlc[0][i].len= len;
112
        rl->rl_vlc[0][i].level= level;
113
        rl->rl_vlc[0][i].run= run;
114
    }
115
}
116

    
117
void ff_mpeg12_common_init(MpegEncContext *s)
118
{
119

    
120
    s->y_dc_scale_table=
121
    s->c_dc_scale_table= ff_mpeg2_dc_scale_table[s->intra_dc_precision];
122

    
123
}
124

    
125
void ff_mpeg1_clean_buffers(MpegEncContext *s){
126
    s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
127
    s->last_dc[1] = s->last_dc[0];
128
    s->last_dc[2] = s->last_dc[0];
129
    memset(s->last_mv, 0, sizeof(s->last_mv));
130
}
131

    
132

    
133
/******************************************/
134
/* decoding */
135

    
136
VLC ff_dc_lum_vlc;
137
VLC ff_dc_chroma_vlc;
138

    
139
static VLC mv_vlc;
140
static VLC mbincr_vlc;
141
static VLC mb_ptype_vlc;
142
static VLC mb_btype_vlc;
143
static VLC mb_pat_vlc;
144

    
145
av_cold void ff_mpeg12_init_vlcs(void)
146
{
147
    static int done = 0;
148

    
149
    if (!done) {
150
        done = 1;
151

    
152
        INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
153
                 ff_mpeg12_vlc_dc_lum_bits, 1, 1,
154
                 ff_mpeg12_vlc_dc_lum_code, 2, 2, 512);
155
        INIT_VLC_STATIC(&ff_dc_chroma_vlc,  DC_VLC_BITS, 12,
156
                 ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
157
                 ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514);
158
        INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
159
                 &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
160
                 &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518);
161
        INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
162
                 &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
163
                 &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538);
164
        INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
165
                 &ff_mpeg12_mbPatTable[0][1], 2, 1,
166
                 &ff_mpeg12_mbPatTable[0][0], 2, 1, 512);
167

    
168
        INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
169
                 &table_mb_ptype[0][1], 2, 1,
170
                 &table_mb_ptype[0][0], 2, 1, 64);
171
        INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
172
                 &table_mb_btype[0][1], 2, 1,
173
                 &table_mb_btype[0][0], 2, 1, 64);
174
        init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
175
        init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
176

    
177
        INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
178
        INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
179
    }
180
}
181

    
182
static inline int get_dmv(MpegEncContext *s)
183
{
184
    if(get_bits1(&s->gb))
185
        return 1 - (get_bits1(&s->gb) << 1);
186
    else
187
        return 0;
188
}
189

    
190
static inline int get_qscale(MpegEncContext *s)
191
{
192
    int qscale = get_bits(&s->gb, 5);
193
    if (s->q_scale_type) {
194
        return non_linear_qscale[qscale];
195
    } else {
196
        return qscale << 1;
197
    }
198
}
199

    
200
/* motion type (for MPEG-2) */
201
#define MT_FIELD 1
202
#define MT_FRAME 2
203
#define MT_16X8  2
204
#define MT_DMV   3
205

    
206
static int mpeg_decode_mb(MpegEncContext *s,
207
                          DCTELEM block[12][64])
208
{
209
    int i, j, k, cbp, val, mb_type, motion_type;
210
    const int mb_block_count = 4 + (1<< s->chroma_format);
211

    
212
    av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
213

    
214
    assert(s->mb_skipped==0);
215

    
216
    if (s->mb_skip_run-- != 0) {
217
        if (s->pict_type == AV_PICTURE_TYPE_P) {
218
            s->mb_skipped = 1;
219
            s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
220
        } else {
221
            int mb_type;
222

    
223
            if(s->mb_x)
224
                mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
225
            else
226
                mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all
227
            if(IS_INTRA(mb_type))
228
                return -1;
229

    
230
            s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
231
                mb_type | MB_TYPE_SKIP;
232
//            assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
233

    
234
            if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
235
                s->mb_skipped = 1;
236
        }
237

    
238
        return 0;
239
    }
240

    
241
    switch(s->pict_type) {
242
    default:
243
    case AV_PICTURE_TYPE_I:
244
        if (get_bits1(&s->gb) == 0) {
245
            if (get_bits1(&s->gb) == 0){
246
                av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
247
                return -1;
248
            }
249
            mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
250
        } else {
251
            mb_type = MB_TYPE_INTRA;
252
        }
253
        break;
254
    case AV_PICTURE_TYPE_P:
255
        mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
256
        if (mb_type < 0){
257
            av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
258
            return -1;
259
        }
260
        mb_type = ptype2mb_type[ mb_type ];
261
        break;
262
    case AV_PICTURE_TYPE_B:
263
        mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
264
        if (mb_type < 0){
265
            av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
266
            return -1;
267
        }
268
        mb_type = btype2mb_type[ mb_type ];
269
        break;
270
    }
271
    av_dlog(s->avctx, "mb_type=%x\n", mb_type);
272
//    motion_type = 0; /* avoid warning */
273
    if (IS_INTRA(mb_type)) {
274
        s->dsp.clear_blocks(s->block[0]);
275

    
276
        if(!s->chroma_y_shift){
277
            s->dsp.clear_blocks(s->block[6]);
278
        }
279

    
280
        /* compute DCT type */
281
        if (s->picture_structure == PICT_FRAME && //FIXME add an interlaced_dct coded var?
282
            !s->frame_pred_frame_dct) {
283
            s->interlaced_dct = get_bits1(&s->gb);
284
        }
285

    
286
        if (IS_QUANT(mb_type))
287
            s->qscale = get_qscale(s);
288

    
289
        if (s->concealment_motion_vectors) {
290
            /* just parse them */
291
            if (s->picture_structure != PICT_FRAME)
292
                skip_bits1(&s->gb); /* field select */
293

    
294
            s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
295
                mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
296
            s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
297
                mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
298

    
299
            skip_bits1(&s->gb); /* marker */
300
        }else
301
            memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
302
        s->mb_intra = 1;
303
        //if 1, we memcpy blocks in xvmcvideo
304
        if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){
305
            ff_xvmc_pack_pblocks(s,-1);//inter are always full blocks
306
            if(s->swap_uv){
307
                exchange_uv(s);
308
            }
309
        }
310

    
311
        if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
312
            if(s->flags2 & CODEC_FLAG2_FAST){
313
                for(i=0;i<6;i++) {
314
                    mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
315
                }
316
            }else{
317
                for(i=0;i<mb_block_count;i++) {
318
                    if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0)
319
                        return -1;
320
                }
321
            }
322
        } else {
323
            for(i=0;i<6;i++) {
324
                if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0)
325
                    return -1;
326
            }
327
        }
328
    } else {
329
        if (mb_type & MB_TYPE_ZERO_MV){
330
            assert(mb_type & MB_TYPE_CBP);
331

    
332
            s->mv_dir = MV_DIR_FORWARD;
333
            if(s->picture_structure == PICT_FRAME){
334
                if(!s->frame_pred_frame_dct)
335
                    s->interlaced_dct = get_bits1(&s->gb);
336
                s->mv_type = MV_TYPE_16X16;
337
            }else{
338
                s->mv_type = MV_TYPE_FIELD;
339
                mb_type |= MB_TYPE_INTERLACED;
340
                s->field_select[0][0]= s->picture_structure - 1;
341
            }
342

    
343
            if (IS_QUANT(mb_type))
344
                s->qscale = get_qscale(s);
345

    
346
            s->last_mv[0][0][0] = 0;
347
            s->last_mv[0][0][1] = 0;
348
            s->last_mv[0][1][0] = 0;
349
            s->last_mv[0][1][1] = 0;
350
            s->mv[0][0][0] = 0;
351
            s->mv[0][0][1] = 0;
352
        }else{
353
            assert(mb_type & MB_TYPE_L0L1);
354
//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
355
            /* get additional motion vector type */
356
            if (s->frame_pred_frame_dct)
357
                motion_type = MT_FRAME;
358
            else{
359
                motion_type = get_bits(&s->gb, 2);
360
                if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
361
                    s->interlaced_dct = get_bits1(&s->gb);
362
            }
363

    
364
            if (IS_QUANT(mb_type))
365
                s->qscale = get_qscale(s);
366

    
367
            /* motion vectors */
368
            s->mv_dir= (mb_type>>13)&3;
369
            av_dlog(s->avctx, "motion_type=%d\n", motion_type);
370
            switch(motion_type) {
371
            case MT_FRAME: /* or MT_16X8 */
372
                if (s->picture_structure == PICT_FRAME) {
373
                    mb_type |= MB_TYPE_16x16;
374
                    s->mv_type = MV_TYPE_16X16;
375
                    for(i=0;i<2;i++) {
376
                        if (USES_LIST(mb_type, i)) {
377
                            /* MT_FRAME */
378
                            s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
379
                                mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
380
                            s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
381
                                mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
382
                            /* full_pel: only for MPEG-1 */
383
                            if (s->full_pel[i]){
384
                                s->mv[i][0][0] <<= 1;
385
                                s->mv[i][0][1] <<= 1;
386
                            }
387
                        }
388
                    }
389
                } else {
390
                    mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
391
                    s->mv_type = MV_TYPE_16X8;
392
                    for(i=0;i<2;i++) {
393
                        if (USES_LIST(mb_type, i)) {
394
                            /* MT_16X8 */
395
                            for(j=0;j<2;j++) {
396
                                s->field_select[i][j] = get_bits1(&s->gb);
397
                                for(k=0;k<2;k++) {
398
                                    val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
399
                                                             s->last_mv[i][j][k]);
400
                                    s->last_mv[i][j][k] = val;
401
                                    s->mv[i][j][k] = val;
402
                                }
403
                            }
404
                        }
405
                    }
406
                }
407
                break;
408
            case MT_FIELD:
409
                if(s->progressive_sequence){
410
                    av_log(s->avctx, AV_LOG_ERROR, "MT_FIELD in progressive_sequence\n");
411
                    return -1;
412
                }
413
                s->mv_type = MV_TYPE_FIELD;
414
                if (s->picture_structure == PICT_FRAME) {
415
                    mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
416
                    for(i=0;i<2;i++) {
417
                        if (USES_LIST(mb_type, i)) {
418
                            for(j=0;j<2;j++) {
419
                                s->field_select[i][j] = get_bits1(&s->gb);
420
                                val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
421
                                                         s->last_mv[i][j][0]);
422
                                s->last_mv[i][j][0] = val;
423
                                s->mv[i][j][0] = val;
424
                                av_dlog(s->avctx, "fmx=%d\n", val);
425
                                val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
426
                                                         s->last_mv[i][j][1] >> 1);
427
                                s->last_mv[i][j][1] = val << 1;
428
                                s->mv[i][j][1] = val;
429
                                av_dlog(s->avctx, "fmy=%d\n", val);
430
                            }
431
                        }
432
                    }
433
                } else {
434
                    mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
435
                    for(i=0;i<2;i++) {
436
                        if (USES_LIST(mb_type, i)) {
437
                            s->field_select[i][0] = get_bits1(&s->gb);
438
                            for(k=0;k<2;k++) {
439
                                val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
440
                                                         s->last_mv[i][0][k]);
441
                                s->last_mv[i][0][k] = val;
442
                                s->last_mv[i][1][k] = val;
443
                                s->mv[i][0][k] = val;
444
                            }
445
                        }
446
                    }
447
                }
448
                break;
449
            case MT_DMV:
450
                if(s->progressive_sequence){
451
                    av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
452
                    return -1;
453
                }
454
                s->mv_type = MV_TYPE_DMV;
455
                for(i=0;i<2;i++) {
456
                    if (USES_LIST(mb_type, i)) {
457
                        int dmx, dmy, mx, my, m;
458
                        const int my_shift= s->picture_structure == PICT_FRAME;
459

    
460
                        mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
461
                                                s->last_mv[i][0][0]);
462
                        s->last_mv[i][0][0] = mx;
463
                        s->last_mv[i][1][0] = mx;
464
                        dmx = get_dmv(s);
465
                        my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
466
                                                s->last_mv[i][0][1] >> my_shift);
467
                        dmy = get_dmv(s);
468

    
469

    
470
                        s->last_mv[i][0][1] = my<<my_shift;
471
                        s->last_mv[i][1][1] = my<<my_shift;
472

    
473
                        s->mv[i][0][0] = mx;
474
                        s->mv[i][0][1] = my;
475
                        s->mv[i][1][0] = mx;//not used
476
                        s->mv[i][1][1] = my;//not used
477

    
478
                        if (s->picture_structure == PICT_FRAME) {
479
                            mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
480

    
481
                            //m = 1 + 2 * s->top_field_first;
482
                            m = s->top_field_first ? 1 : 3;
483

    
484
                            /* top -> top pred */
485
                            s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
486
                            s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
487
                            m = 4 - m;
488
                            s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
489
                            s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
490
                        } else {
491
                            mb_type |= MB_TYPE_16x16;
492

    
493
                            s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
494
                            s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
495
                            if(s->picture_structure == PICT_TOP_FIELD)
496
                                s->mv[i][2][1]--;
497
                            else
498
                                s->mv[i][2][1]++;
499
                        }
500
                    }
501
                }
502
                break;
503
            default:
504
                av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
505
                return -1;
506
            }
507
        }
508

    
509
        s->mb_intra = 0;
510
        if (HAS_CBP(mb_type)) {
511
            s->dsp.clear_blocks(s->block[0]);
512

    
513
            cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
514
            if(mb_block_count > 6){
515
                 cbp<<= mb_block_count-6;
516
                 cbp |= get_bits(&s->gb, mb_block_count-6);
517
                 s->dsp.clear_blocks(s->block[6]);
518
            }
519
            if (cbp <= 0){
520
                av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
521
                return -1;
522
            }
523

    
524
            //if 1, we memcpy blocks in xvmcvideo
525
            if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){
526
                ff_xvmc_pack_pblocks(s,cbp);
527
                if(s->swap_uv){
528
                    exchange_uv(s);
529
                }
530
            }
531

    
532
            if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
533
                if(s->flags2 & CODEC_FLAG2_FAST){
534
                    for(i=0;i<6;i++) {
535
                        if(cbp & 32) {
536
                            mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
537
                        } else {
538
                            s->block_last_index[i] = -1;
539
                        }
540
                        cbp+=cbp;
541
                    }
542
                }else{
543
                    cbp<<= 12-mb_block_count;
544

    
545
                    for(i=0;i<mb_block_count;i++) {
546
                        if ( cbp & (1<<11) ) {
547
                            if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0)
548
                                return -1;
549
                        } else {
550
                            s->block_last_index[i] = -1;
551
                        }
552
                        cbp+=cbp;
553
                    }
554
                }
555
            } else {
556
                if(s->flags2 & CODEC_FLAG2_FAST){
557
                    for(i=0;i<6;i++) {
558
                        if (cbp & 32) {
559
                            mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
560
                        } else {
561
                            s->block_last_index[i] = -1;
562
                        }
563
                        cbp+=cbp;
564
                    }
565
                }else{
566
                    for(i=0;i<6;i++) {
567
                        if (cbp & 32) {
568
                            if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0)
569
                                return -1;
570
                        } else {
571
                            s->block_last_index[i] = -1;
572
                        }
573
                        cbp+=cbp;
574
                    }
575
                }
576
            }
577
        }else{
578
            for(i=0;i<12;i++)
579
                s->block_last_index[i] = -1;
580
        }
581
    }
582

    
583
    s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
584

    
585
    return 0;
586
}
587

    
588
/* as H.263, but only 17 codes */
589
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
590
{
591
    int code, sign, val, l, shift;
592

    
593
    code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
594
    if (code == 0) {
595
        return pred;
596
    }
597
    if (code < 0) {
598
        return 0xffff;
599
    }
600

    
601
    sign = get_bits1(&s->gb);
602
    shift = fcode - 1;
603
    val = code;
604
    if (shift) {
605
        val = (val - 1) << shift;
606
        val |= get_bits(&s->gb, shift);
607
        val++;
608
    }
609
    if (sign)
610
        val = -val;
611
    val += pred;
612

    
613
    /* modulo decoding */
614
    l= INT_BIT - 5 - shift;
615
    val = (val<<l)>>l;
616
    return val;
617
}
618

    
619
static inline int mpeg1_decode_block_intra(MpegEncContext *s,
620
                               DCTELEM *block,
621
                               int n)
622
{
623
    int level, dc, diff, i, j, run;
624
    int component;
625
    RLTable *rl = &ff_rl_mpeg1;
626
    uint8_t * const scantable= s->intra_scantable.permutated;
627
    const uint16_t *quant_matrix= s->intra_matrix;
628
    const int qscale= s->qscale;
629

    
630
    /* DC coefficient */
631
    component = (n <= 3 ? 0 : n - 4 + 1);
632
    diff = decode_dc(&s->gb, component);
633
    if (diff >= 0xffff)
634
        return -1;
635
    dc = s->last_dc[component];
636
    dc += diff;
637
    s->last_dc[component] = dc;
638
    block[0] = dc*quant_matrix[0];
639
    av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
640
    i = 0;
641
    {
642
        OPEN_READER(re, &s->gb);
643
        /* now quantify & encode AC coefficients */
644
        for(;;) {
645
            UPDATE_CACHE(re, &s->gb);
646
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
647

    
648
            if(level == 127){
649
                break;
650
            } else if(level != 0) {
651
                i += run;
652
                j = scantable[i];
653
                level= (level*qscale*quant_matrix[j])>>4;
654
                level= (level-1)|1;
655
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
656
                LAST_SKIP_BITS(re, &s->gb, 1);
657
            } else {
658
                /* escape */
659
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
660
                UPDATE_CACHE(re, &s->gb);
661
                level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
662
                if (level == -128) {
663
                    level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
664
                } else if (level == 0) {
665
                    level = SHOW_UBITS(re, &s->gb, 8)      ; LAST_SKIP_BITS(re, &s->gb, 8);
666
                }
667
                i += run;
668
                j = scantable[i];
669
                if(level<0){
670
                    level= -level;
671
                    level= (level*qscale*quant_matrix[j])>>4;
672
                    level= (level-1)|1;
673
                    level= -level;
674
                }else{
675
                    level= (level*qscale*quant_matrix[j])>>4;
676
                    level= (level-1)|1;
677
                }
678
            }
679
            if (i > 63){
680
                av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
681
                return -1;
682
            }
683

    
684
            block[j] = level;
685
        }
686
        CLOSE_READER(re, &s->gb);
687
    }
688
    s->block_last_index[n] = i;
689
   return 0;
690
}
691

    
692
int ff_mpeg1_decode_block_intra(MpegEncContext *s,
693
                                DCTELEM *block,
694
                                int n)
695
{
696
    return mpeg1_decode_block_intra(s, block, n);
697
}
698

    
699
static inline int mpeg1_decode_block_inter(MpegEncContext *s,
700
                               DCTELEM *block,
701
                               int n)
702
{
703
    int level, i, j, run;
704
    RLTable *rl = &ff_rl_mpeg1;
705
    uint8_t * const scantable= s->intra_scantable.permutated;
706
    const uint16_t *quant_matrix= s->inter_matrix;
707
    const int qscale= s->qscale;
708

    
709
    {
710
        OPEN_READER(re, &s->gb);
711
        i = -1;
712
        // special case for first coefficient, no need to add second VLC table
713
        UPDATE_CACHE(re, &s->gb);
714
        if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
715
            level= (3*qscale*quant_matrix[0])>>5;
716
            level= (level-1)|1;
717
            if(GET_CACHE(re, &s->gb)&0x40000000)
718
                level= -level;
719
            block[0] = level;
720
            i++;
721
            SKIP_BITS(re, &s->gb, 2);
722
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
723
                goto end;
724
        }
725
        /* now quantify & encode AC coefficients */
726
        for(;;) {
727
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
728

    
729
            if(level != 0) {
730
                i += run;
731
                j = scantable[i];
732
                level= ((level*2+1)*qscale*quant_matrix[j])>>5;
733
                level= (level-1)|1;
734
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
735
                SKIP_BITS(re, &s->gb, 1);
736
            } else {
737
                /* escape */
738
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
739
                UPDATE_CACHE(re, &s->gb);
740
                level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
741
                if (level == -128) {
742
                    level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
743
                } else if (level == 0) {
744
                    level = SHOW_UBITS(re, &s->gb, 8)      ; SKIP_BITS(re, &s->gb, 8);
745
                }
746
                i += run;
747
                j = scantable[i];
748
                if(level<0){
749
                    level= -level;
750
                    level= ((level*2+1)*qscale*quant_matrix[j])>>5;
751
                    level= (level-1)|1;
752
                    level= -level;
753
                }else{
754
                    level= ((level*2+1)*qscale*quant_matrix[j])>>5;
755
                    level= (level-1)|1;
756
                }
757
            }
758
            if (i > 63){
759
                av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
760
                return -1;
761
            }
762

    
763
            block[j] = level;
764
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
765
                break;
766
            UPDATE_CACHE(re, &s->gb);
767
        }
768
end:
769
        LAST_SKIP_BITS(re, &s->gb, 2);
770
        CLOSE_READER(re, &s->gb);
771
    }
772
    s->block_last_index[n] = i;
773
    return 0;
774
}
775

    
776
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
777
{
778
    int level, i, j, run;
779
    RLTable *rl = &ff_rl_mpeg1;
780
    uint8_t * const scantable= s->intra_scantable.permutated;
781
    const int qscale= s->qscale;
782

    
783
    {
784
        OPEN_READER(re, &s->gb);
785
        i = -1;
786
        // special case for first coefficient, no need to add second VLC table
787
        UPDATE_CACHE(re, &s->gb);
788
        if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
789
            level= (3*qscale)>>1;
790
            level= (level-1)|1;
791
            if(GET_CACHE(re, &s->gb)&0x40000000)
792
                level= -level;
793
            block[0] = level;
794
            i++;
795
            SKIP_BITS(re, &s->gb, 2);
796
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
797
                goto end;
798
        }
799

    
800
        /* now quantify & encode AC coefficients */
801
        for(;;) {
802
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
803

    
804
            if(level != 0) {
805
                i += run;
806
                j = scantable[i];
807
                level= ((level*2+1)*qscale)>>1;
808
                level= (level-1)|1;
809
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
810
                SKIP_BITS(re, &s->gb, 1);
811
            } else {
812
                /* escape */
813
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
814
                UPDATE_CACHE(re, &s->gb);
815
                level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
816
                if (level == -128) {
817
                    level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
818
                } else if (level == 0) {
819
                    level = SHOW_UBITS(re, &s->gb, 8)      ; SKIP_BITS(re, &s->gb, 8);
820
                }
821
                i += run;
822
                j = scantable[i];
823
                if(level<0){
824
                    level= -level;
825
                    level= ((level*2+1)*qscale)>>1;
826
                    level= (level-1)|1;
827
                    level= -level;
828
                }else{
829
                    level= ((level*2+1)*qscale)>>1;
830
                    level= (level-1)|1;
831
                }
832
            }
833

    
834
            block[j] = level;
835
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
836
                break;
837
            UPDATE_CACHE(re, &s->gb);
838
        }
839
end:
840
        LAST_SKIP_BITS(re, &s->gb, 2);
841
        CLOSE_READER(re, &s->gb);
842
    }
843
    s->block_last_index[n] = i;
844
    return 0;
845
}
846

    
847

    
848
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
849
                               DCTELEM *block,
850
                               int n)
851
{
852
    int level, i, j, run;
853
    RLTable *rl = &ff_rl_mpeg1;
854
    uint8_t * const scantable= s->intra_scantable.permutated;
855
    const uint16_t *quant_matrix;
856
    const int qscale= s->qscale;
857
    int mismatch;
858

    
859
    mismatch = 1;
860

    
861
    {
862
        OPEN_READER(re, &s->gb);
863
        i = -1;
864
        if (n < 4)
865
            quant_matrix = s->inter_matrix;
866
        else
867
            quant_matrix = s->chroma_inter_matrix;
868

    
869
        // special case for first coefficient, no need to add second VLC table
870
        UPDATE_CACHE(re, &s->gb);
871
        if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
872
            level= (3*qscale*quant_matrix[0])>>5;
873
            if(GET_CACHE(re, &s->gb)&0x40000000)
874
                level= -level;
875
            block[0] = level;
876
            mismatch ^= level;
877
            i++;
878
            SKIP_BITS(re, &s->gb, 2);
879
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
880
                goto end;
881
        }
882

    
883
        /* now quantify & encode AC coefficients */
884
        for(;;) {
885
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
886

    
887
            if(level != 0) {
888
                i += run;
889
                j = scantable[i];
890
                level= ((level*2+1)*qscale*quant_matrix[j])>>5;
891
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
892
                SKIP_BITS(re, &s->gb, 1);
893
            } else {
894
                /* escape */
895
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
896
                UPDATE_CACHE(re, &s->gb);
897
                level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
898

    
899
                i += run;
900
                j = scantable[i];
901
                if(level<0){
902
                    level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
903
                    level= -level;
904
                }else{
905
                    level= ((level*2+1)*qscale*quant_matrix[j])>>5;
906
                }
907
            }
908
            if (i > 63){
909
                av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
910
                return -1;
911
            }
912

    
913
            mismatch ^= level;
914
            block[j] = level;
915
            if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
916
                break;
917
            UPDATE_CACHE(re, &s->gb);
918
        }
919
end:
920
        LAST_SKIP_BITS(re, &s->gb, 2);
921
        CLOSE_READER(re, &s->gb);
922
    }
923
    block[63] ^= (mismatch & 1);
924

    
925
    s->block_last_index[n] = i;
926
    return 0;
927
}
928

    
929
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
930
                               DCTELEM *block,
931
                               int n)
932
{
933
    int level, i, j, run;
934
    RLTable *rl = &ff_rl_mpeg1;
935
    uint8_t * const scantable= s->intra_scantable.permutated;
936
    const int qscale= s->qscale;
937
    OPEN_READER(re, &s->gb);
938
    i = -1;
939

    
940
    // special case for first coefficient, no need to add second VLC table
941
    UPDATE_CACHE(re, &s->gb);
942
    if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
943
        level= (3*qscale)>>1;
944
        if(GET_CACHE(re, &s->gb)&0x40000000)
945
            level= -level;
946
        block[0] = level;
947
        i++;
948
        SKIP_BITS(re, &s->gb, 2);
949
        if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
950
            goto end;
951
    }
952

    
953
    /* now quantify & encode AC coefficients */
954
    for(;;) {
955
        GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
956

    
957
        if(level != 0) {
958
            i += run;
959
            j = scantable[i];
960
            level= ((level*2+1)*qscale)>>1;
961
            level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
962
            SKIP_BITS(re, &s->gb, 1);
963
        } else {
964
            /* escape */
965
            run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
966
            UPDATE_CACHE(re, &s->gb);
967
            level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
968

    
969
            i += run;
970
            j = scantable[i];
971
            if(level<0){
972
                level= ((-level*2+1)*qscale)>>1;
973
                level= -level;
974
            }else{
975
                level= ((level*2+1)*qscale)>>1;
976
            }
977
        }
978

    
979
        block[j] = level;
980
        if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
981
            break;
982
        UPDATE_CACHE(re, &s->gb);
983
    }
984
end:
985
    LAST_SKIP_BITS(re, &s->gb, 2);
986
    CLOSE_READER(re, &s->gb);
987
    s->block_last_index[n] = i;
988
    return 0;
989
}
990

    
991

    
992
static inline int mpeg2_decode_block_intra(MpegEncContext *s,
993
                               DCTELEM *block,
994
                               int n)
995
{
996
    int level, dc, diff, i, j, run;
997
    int component;
998
    RLTable *rl;
999
    uint8_t * const scantable= s->intra_scantable.permutated;
1000
    const uint16_t *quant_matrix;
1001
    const int qscale= s->qscale;
1002
    int mismatch;
1003

    
1004
    /* DC coefficient */
1005
    if (n < 4){
1006
        quant_matrix = s->intra_matrix;
1007
        component = 0;
1008
    }else{
1009
        quant_matrix = s->chroma_intra_matrix;
1010
        component = (n&1) + 1;
1011
    }
1012
    diff = decode_dc(&s->gb, component);
1013
    if (diff >= 0xffff)
1014
        return -1;
1015
    dc = s->last_dc[component];
1016
    dc += diff;
1017
    s->last_dc[component] = dc;
1018
    block[0] = dc << (3 - s->intra_dc_precision);
1019
    av_dlog(s->avctx, "dc=%d\n", block[0]);
1020
    mismatch = block[0] ^ 1;
1021
    i = 0;
1022
    if (s->intra_vlc_format)
1023
        rl = &ff_rl_mpeg2;
1024
    else
1025
        rl = &ff_rl_mpeg1;
1026

    
1027
    {
1028
        OPEN_READER(re, &s->gb);
1029
        /* now quantify & encode AC coefficients */
1030
        for(;;) {
1031
            UPDATE_CACHE(re, &s->gb);
1032
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1033

    
1034
            if(level == 127){
1035
                break;
1036
            } else if(level != 0) {
1037
                i += run;
1038
                j = scantable[i];
1039
                level= (level*qscale*quant_matrix[j])>>4;
1040
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1041
                LAST_SKIP_BITS(re, &s->gb, 1);
1042
            } else {
1043
                /* escape */
1044
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1045
                UPDATE_CACHE(re, &s->gb);
1046
                level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1047
                i += run;
1048
                j = scantable[i];
1049
                if(level<0){
1050
                    level= (-level*qscale*quant_matrix[j])>>4;
1051
                    level= -level;
1052
                }else{
1053
                    level= (level*qscale*quant_matrix[j])>>4;
1054
                }
1055
            }
1056
            if (i > 63){
1057
                av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1058
                return -1;
1059
            }
1060

    
1061
            mismatch^= level;
1062
            block[j] = level;
1063
        }
1064
        CLOSE_READER(re, &s->gb);
1065
    }
1066
    block[63]^= mismatch&1;
1067

    
1068
    s->block_last_index[n] = i;
1069
    return 0;
1070
}
1071

    
1072
static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
1073
                               DCTELEM *block,
1074
                               int n)
1075
{
1076
    int level, dc, diff, j, run;
1077
    int component;
1078
    RLTable *rl;
1079
    uint8_t * scantable= s->intra_scantable.permutated;
1080
    const uint16_t *quant_matrix;
1081
    const int qscale= s->qscale;
1082

    
1083
    /* DC coefficient */
1084
    if (n < 4){
1085
        quant_matrix = s->intra_matrix;
1086
        component = 0;
1087
    }else{
1088
        quant_matrix = s->chroma_intra_matrix;
1089
        component = (n&1) + 1;
1090
    }
1091
    diff = decode_dc(&s->gb, component);
1092
    if (diff >= 0xffff)
1093
        return -1;
1094
    dc = s->last_dc[component];
1095
    dc += diff;
1096
    s->last_dc[component] = dc;
1097
    block[0] = dc << (3 - s->intra_dc_precision);
1098
    if (s->intra_vlc_format)
1099
        rl = &ff_rl_mpeg2;
1100
    else
1101
        rl = &ff_rl_mpeg1;
1102

    
1103
    {
1104
        OPEN_READER(re, &s->gb);
1105
        /* now quantify & encode AC coefficients */
1106
        for(;;) {
1107
            UPDATE_CACHE(re, &s->gb);
1108
            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1109

    
1110
            if(level == 127){
1111
                break;
1112
            } else if(level != 0) {
1113
                scantable += run;
1114
                j = *scantable;
1115
                level= (level*qscale*quant_matrix[j])>>4;
1116
                level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1117
                LAST_SKIP_BITS(re, &s->gb, 1);
1118
            } else {
1119
                /* escape */
1120
                run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1121
                UPDATE_CACHE(re, &s->gb);
1122
                level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1123
                scantable += run;
1124
                j = *scantable;
1125
                if(level<0){
1126
                    level= (-level*qscale*quant_matrix[j])>>4;
1127
                    level= -level;
1128
                }else{
1129
                    level= (level*qscale*quant_matrix[j])>>4;
1130
                }
1131
            }
1132

    
1133
            block[j] = level;
1134
        }
1135
        CLOSE_READER(re, &s->gb);
1136
    }
1137

    
1138
    s->block_last_index[n] = scantable - s->intra_scantable.permutated;
1139
    return 0;
1140
}
1141

    
1142
typedef struct Mpeg1Context {
1143
    MpegEncContext mpeg_enc_ctx;
1144
    int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1145
    int repeat_field; /* true if we must repeat the field */
1146
    AVPanScan pan_scan;              /**< some temporary storage for the panscan */
1147
    int slice_count;
1148
    int swap_uv;//indicate VCR2
1149
    int save_aspect_info;
1150
    int save_width, save_height, save_progressive_seq;
1151
    AVRational frame_rate_ext;       ///< MPEG-2 specific framerate modificator
1152
    int sync;                        ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
1153
} Mpeg1Context;
1154

    
1155
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
1156
{
1157
    Mpeg1Context *s = avctx->priv_data;
1158
    MpegEncContext *s2 = &s->mpeg_enc_ctx;
1159
    int i;
1160

    
1161
    /* we need some permutation to store matrices,
1162
     * until MPV_common_init() sets the real permutation. */
1163
    for(i=0;i<64;i++)
1164
       s2->dsp.idct_permutation[i]=i;
1165

    
1166
    MPV_decode_defaults(s2);
1167

    
1168
    s->mpeg_enc_ctx.avctx= avctx;
1169
    s->mpeg_enc_ctx.flags= avctx->flags;
1170
    s->mpeg_enc_ctx.flags2= avctx->flags2;
1171
    ff_mpeg12_common_init(&s->mpeg_enc_ctx);
1172
    ff_mpeg12_init_vlcs();
1173

    
1174
    s->mpeg_enc_ctx_allocated = 0;
1175
    s->mpeg_enc_ctx.picture_number = 0;
1176
    s->repeat_field = 0;
1177
    s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1178
    avctx->color_range= AVCOL_RANGE_MPEG;
1179
    if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
1180
        avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1181
    else
1182
        avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1183
    return 0;
1184
}
1185

    
1186
static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
1187
{
1188
    Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data;
1189
    MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
1190
    int err;
1191

    
1192
    if(avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
1193
        return 0;
1194

    
1195
    err = ff_mpeg_update_thread_context(avctx, avctx_from);
1196
    if(err) return err;
1197

    
1198
    if(!ctx->mpeg_enc_ctx_allocated)
1199
        memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
1200

    
1201
    if(!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay))
1202
        s->picture_number++;
1203

    
1204
    return 0;
1205
}
1206

    
1207
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1208
                                     const uint8_t *new_perm){
1209
    uint16_t temp_matrix[64];
1210
    int i;
1211

    
1212
    memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
1213

    
1214
    for(i=0;i<64;i++){
1215
        matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1216
    }
1217
}
1218

    
1219
static const enum PixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
1220
#if CONFIG_MPEG_XVMC_DECODER
1221
    PIX_FMT_XVMC_MPEG2_IDCT,
1222
    PIX_FMT_XVMC_MPEG2_MC,
1223
#endif
1224
#if CONFIG_MPEG1_VDPAU_HWACCEL
1225
    PIX_FMT_VDPAU_MPEG1,
1226
#endif
1227
    PIX_FMT_YUV420P,
1228
    PIX_FMT_NONE
1229
};
1230

    
1231
static const enum PixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
1232
#if CONFIG_MPEG_XVMC_DECODER
1233
    PIX_FMT_XVMC_MPEG2_IDCT,
1234
    PIX_FMT_XVMC_MPEG2_MC,
1235
#endif
1236
#if CONFIG_MPEG2_VDPAU_HWACCEL
1237
    PIX_FMT_VDPAU_MPEG2,
1238
#endif
1239
#if CONFIG_MPEG2_DXVA2_HWACCEL
1240
    PIX_FMT_DXVA2_VLD,
1241
#endif
1242
#if CONFIG_MPEG2_VAAPI_HWACCEL
1243
    PIX_FMT_VAAPI_VLD,
1244
#endif
1245
    PIX_FMT_YUV420P,
1246
    PIX_FMT_NONE
1247
};
1248

    
1249
static inline int uses_vdpau(AVCodecContext *avctx) {
1250
    return avctx->pix_fmt == PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == PIX_FMT_VDPAU_MPEG2;
1251
}
1252

    
1253
static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx){
1254
    Mpeg1Context *s1 = avctx->priv_data;
1255
    MpegEncContext *s = &s1->mpeg_enc_ctx;
1256

    
1257
    if(s->chroma_format < 2) {
1258
        enum PixelFormat res;
1259
        res = avctx->get_format(avctx,
1260
                                avctx->codec_id == CODEC_ID_MPEG1VIDEO ?
1261
                                mpeg1_hwaccel_pixfmt_list_420 :
1262
                                mpeg2_hwaccel_pixfmt_list_420);
1263
        if (res != PIX_FMT_XVMC_MPEG2_IDCT && res != PIX_FMT_XVMC_MPEG2_MC) {
1264
            avctx->xvmc_acceleration = 0;
1265
        } else if (!avctx->xvmc_acceleration) {
1266
            avctx->xvmc_acceleration = 2;
1267
        }
1268
        return res;
1269
    } else if(s->chroma_format == 2)
1270
        return PIX_FMT_YUV422P;
1271
    else
1272
        return PIX_FMT_YUV444P;
1273
}
1274

    
1275
/* Call this function when we know all parameters.
1276
 * It may be called in different places for MPEG-1 and MPEG-2. */
1277
static int mpeg_decode_postinit(AVCodecContext *avctx){
1278
    Mpeg1Context *s1 = avctx->priv_data;
1279
    MpegEncContext *s = &s1->mpeg_enc_ctx;
1280
    uint8_t old_permutation[64];
1281

    
1282
    if (
1283
        (s1->mpeg_enc_ctx_allocated == 0)||
1284
        avctx->coded_width  != s->width ||
1285
        avctx->coded_height != s->height||
1286
        s1->save_width != s->width ||
1287
        s1->save_height != s->height ||
1288
        s1->save_aspect_info != s->aspect_ratio_info||
1289
        s1->save_progressive_seq != s->progressive_sequence ||
1290
        0)
1291
    {
1292

    
1293
        if (s1->mpeg_enc_ctx_allocated) {
1294
            ParseContext pc= s->parse_context;
1295
            s->parse_context.buffer=0;
1296
            MPV_common_end(s);
1297
            s->parse_context= pc;
1298
        }
1299

    
1300
        if( (s->width == 0 )||(s->height == 0))
1301
            return -2;
1302

    
1303
        avcodec_set_dimensions(avctx, s->width, s->height);
1304
        avctx->bit_rate = s->bit_rate;
1305
        s1->save_aspect_info = s->aspect_ratio_info;
1306
        s1->save_width = s->width;
1307
        s1->save_height = s->height;
1308
        s1->save_progressive_seq = s->progressive_sequence;
1309

    
1310
        /* low_delay may be forced, in this case we will have B-frames
1311
         * that behave like P-frames. */
1312
        avctx->has_b_frames = !(s->low_delay);
1313

    
1314
        assert((avctx->sub_id==1) == (avctx->codec_id==CODEC_ID_MPEG1VIDEO));
1315
        if(avctx->codec_id==CODEC_ID_MPEG1VIDEO){
1316
            //MPEG-1 fps
1317
            avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
1318
            avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
1319
            //MPEG-1 aspect
1320
            avctx->sample_aspect_ratio= av_d2q(
1321
                    1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
1322
            avctx->ticks_per_frame=1;
1323
        }else{//MPEG-2
1324
        //MPEG-2 fps
1325
            av_reduce(
1326
                &s->avctx->time_base.den,
1327
                &s->avctx->time_base.num,
1328
                ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
1329
                ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1330
                1<<30);
1331
            avctx->ticks_per_frame=2;
1332
        //MPEG-2 aspect
1333
            if(s->aspect_ratio_info > 1){
1334
                AVRational dar=
1335
                    av_mul_q(
1336
                        av_div_q(
1337
                            ff_mpeg2_aspect[s->aspect_ratio_info],
1338
                            (AVRational){s1->pan_scan.width, s1->pan_scan.height}
1339
                        ),
1340
                        (AVRational){s->width, s->height});
1341

    
1342
                //we ignore the spec here and guess a bit as reality does not match the spec, see for example
1343
                // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1344
                //issue1613, 621, 562
1345
                if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0)
1346
                   || (av_cmp_q(dar,(AVRational){4,3})&&av_cmp_q(dar,(AVRational){16,9}))){
1347
                    s->avctx->sample_aspect_ratio=
1348
                        av_div_q(
1349
                         ff_mpeg2_aspect[s->aspect_ratio_info],
1350
                         (AVRational){s->width, s->height}
1351
                         );
1352
                }else{
1353
                    s->avctx->sample_aspect_ratio=
1354
                        av_div_q(
1355
                         ff_mpeg2_aspect[s->aspect_ratio_info],
1356
                         (AVRational){s1->pan_scan.width, s1->pan_scan.height}
1357
                        );
1358
//issue1613 4/3 16/9 -> 16/9
1359
//res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
1360
//widescreen-issue562.mpg 4/3 16/9 -> 16/9
1361
//                    s->avctx->sample_aspect_ratio= av_mul_q(s->avctx->sample_aspect_ratio, (AVRational){s->width, s->height});
1362
//av_log(NULL, AV_LOG_ERROR, "A %d/%d\n",ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den);
1363
//av_log(NULL, AV_LOG_ERROR, "B %d/%d\n",s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den);
1364
                }
1365
            }else{
1366
                s->avctx->sample_aspect_ratio=
1367
                    ff_mpeg2_aspect[s->aspect_ratio_info];
1368
            }
1369
        }//MPEG-2
1370

    
1371
        avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1372
        avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
1373
        //until then pix_fmt may be changed right after codec init
1374
        if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
1375
            avctx->hwaccel )
1376
            if( avctx->idct_algo == FF_IDCT_AUTO )
1377
                avctx->idct_algo = FF_IDCT_SIMPLE;
1378

    
1379
        /* Quantization matrices may need reordering
1380
         * if DCT permutation is changed. */
1381
        memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
1382

    
1383
        if (MPV_common_init(s) < 0)
1384
            return -2;
1385

    
1386
        quant_matrix_rebuild(s->intra_matrix,       old_permutation,s->dsp.idct_permutation);
1387
        quant_matrix_rebuild(s->inter_matrix,       old_permutation,s->dsp.idct_permutation);
1388
        quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
1389
        quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
1390

    
1391
        s1->mpeg_enc_ctx_allocated = 1;
1392
    }
1393
    return 0;
1394
}
1395

    
1396
static int mpeg1_decode_picture(AVCodecContext *avctx,
1397
                                const uint8_t *buf, int buf_size)
1398
{
1399
    Mpeg1Context *s1 = avctx->priv_data;
1400
    MpegEncContext *s = &s1->mpeg_enc_ctx;
1401
    int ref, f_code, vbv_delay;
1402

    
1403
    init_get_bits(&s->gb, buf, buf_size*8);
1404

    
1405
    ref = get_bits(&s->gb, 10); /* temporal ref */
1406
    s->pict_type = get_bits(&s->gb, 3);
1407
    if(s->pict_type == 0 || s->pict_type > 3)
1408
        return -1;
1409

    
1410
    vbv_delay= get_bits(&s->gb, 16);
1411
    if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
1412
        s->full_pel[0] = get_bits1(&s->gb);
1413
        f_code = get_bits(&s->gb, 3);
1414
        if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT)
1415
            return -1;
1416
        s->mpeg_f_code[0][0] = f_code;
1417
        s->mpeg_f_code[0][1] = f_code;
1418
    }
1419
    if (s->pict_type == AV_PICTURE_TYPE_B) {
1420
        s->full_pel[1] = get_bits1(&s->gb);
1421
        f_code = get_bits(&s->gb, 3);
1422
        if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT)
1423
            return -1;
1424
        s->mpeg_f_code[1][0] = f_code;
1425
        s->mpeg_f_code[1][1] = f_code;
1426
    }
1427
    s->current_picture.pict_type= s->pict_type;
1428
    s->current_picture.key_frame= s->pict_type == AV_PICTURE_TYPE_I;
1429

    
1430
    if(avctx->debug & FF_DEBUG_PICT_INFO)
1431
        av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1432

    
1433
    s->y_dc_scale = 8;
1434
    s->c_dc_scale = 8;
1435
    return 0;
1436
}
1437

    
1438
static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1439
{
1440
    MpegEncContext *s= &s1->mpeg_enc_ctx;
1441
    int horiz_size_ext, vert_size_ext;
1442
    int bit_rate_ext;
1443

    
1444
    skip_bits(&s->gb, 1); /* profile and level esc*/
1445
    s->avctx->profile= get_bits(&s->gb, 3);
1446
    s->avctx->level= get_bits(&s->gb, 4);
1447
    s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1448
    s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1449
    horiz_size_ext = get_bits(&s->gb, 2);
1450
    vert_size_ext = get_bits(&s->gb, 2);
1451
    s->width |= (horiz_size_ext << 12);
1452
    s->height |= (vert_size_ext << 12);
1453
    bit_rate_ext = get_bits(&s->gb, 12);  /* XXX: handle it */
1454
    s->bit_rate += (bit_rate_ext << 18) * 400;
1455
    skip_bits1(&s->gb); /* marker */
1456
    s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
1457

    
1458
    s->low_delay = get_bits1(&s->gb);
1459
    if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1460

    
1461
    s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
1462
    s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
1463

    
1464
    av_dlog(s->avctx, "sequence extension\n");
1465
    s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1466
    s->avctx->sub_id = 2; /* indicates MPEG-2 found */
1467

    
1468
    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1469
        av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1470
               s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
1471

    
1472
}
1473

    
1474
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1475
{
1476
    MpegEncContext *s= &s1->mpeg_enc_ctx;
1477
    int color_description, w, h;
1478

    
1479
    skip_bits(&s->gb, 3); /* video format */
1480
    color_description= get_bits1(&s->gb);
1481
    if(color_description){
1482
        s->avctx->color_primaries= get_bits(&s->gb, 8);
1483
        s->avctx->color_trc      = get_bits(&s->gb, 8);
1484
        s->avctx->colorspace     = get_bits(&s->gb, 8);
1485
    }
1486
    w= get_bits(&s->gb, 14);
1487
    skip_bits(&s->gb, 1); //marker
1488
    h= get_bits(&s->gb, 14);
1489
    // remaining 3 bits are zero padding
1490

    
1491
    s1->pan_scan.width= 16*w;
1492
    s1->pan_scan.height=16*h;
1493

    
1494
    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1495
        av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1496
}
1497

    
1498
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1499
{
1500
    MpegEncContext *s= &s1->mpeg_enc_ctx;
1501
    int i,nofco;
1502

    
1503
    nofco = 1;
1504
    if(s->progressive_sequence){
1505
        if(s->repeat_first_field){
1506
            nofco++;
1507
            if(s->top_field_first)
1508
                nofco++;
1509
        }
1510
    }else{
1511
        if(s->picture_structure == PICT_FRAME){
1512
            nofco++;
1513
            if(s->repeat_first_field)
1514
                nofco++;
1515
        }
1516
    }
1517
    for(i=0; i<nofco; i++){
1518
        s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1519
        skip_bits(&s->gb, 1); //marker
1520
        s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1521
        skip_bits(&s->gb, 1); //marker
1522
    }
1523

    
1524
    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1525
        av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1526
            s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1527
            s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1528
            s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1529
        );
1530
}
1531

    
1532
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra){
1533
    int i;
1534

    
1535
    for(i=0; i<64; i++) {
1536
        int j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1537
        int v = get_bits(&s->gb, 8);
1538
        if(v==0){
1539
            av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1540
            return -1;
1541
        }
1542
        if(intra && i==0 && v!=8){
1543
            av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
1544
            v= 8; // needed by pink.mpg / issue1046
1545
        }
1546
        matrix0[j] = v;
1547
        if(matrix1)
1548
            matrix1[j] = v;
1549
    }
1550
    return 0;
1551
}
1552

    
1553
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1554
{
1555
    av_dlog(s->avctx, "matrix extension\n");
1556

    
1557
    if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1558
    if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1559
    if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL           , 1);
1560
    if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL           , 0);
1561
}
1562

    
1563
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1564
{
1565
    MpegEncContext *s= &s1->mpeg_enc_ctx;
1566

    
1567
    s->full_pel[0] = s->full_pel[1] = 0;
1568
    s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1569
    s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1570
    s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1571
    s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1572
    if(!s->pict_type && s1->mpeg_enc_ctx_allocated){
1573
        av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
1574
        if(s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1]==15){
1575
            if(s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1576
                s->pict_type= AV_PICTURE_TYPE_I;
1577
            else
1578
                s->pict_type= AV_PICTURE_TYPE_P;
1579
        }else
1580
            s->pict_type= AV_PICTURE_TYPE_B;
1581
        s->current_picture.pict_type= s->pict_type;
1582
        s->current_picture.key_frame= s->pict_type == AV_PICTURE_TYPE_I;
1583
    }
1584
    s->intra_dc_precision = get_bits(&s->gb, 2);
1585
    s->picture_structure = get_bits(&s->gb, 2);
1586
    s->top_field_first = get_bits1(&s->gb);
1587
    s->frame_pred_frame_dct = get_bits1(&s->gb);
1588
    s->concealment_motion_vectors = get_bits1(&s->gb);
1589
    s->q_scale_type = get_bits1(&s->gb);
1590
    s->intra_vlc_format = get_bits1(&s->gb);
1591
    s->alternate_scan = get_bits1(&s->gb);
1592
    s->repeat_first_field = get_bits1(&s->gb);
1593
    s->chroma_420_type = get_bits1(&s->gb);
1594
    s->progressive_frame = get_bits1(&s->gb);
1595

    
1596
    if(s->progressive_sequence && !s->progressive_frame){
1597
        s->progressive_frame= 1;
1598
        av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
1599
    }
1600

    
1601
    if(s->picture_structure==0 || (s->progressive_frame && s->picture_structure!=PICT_FRAME)){
1602
        av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
1603
        s->picture_structure= PICT_FRAME;
1604
    }
1605

    
1606
    if(s->progressive_sequence && !s->frame_pred_frame_dct){
1607
        av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
1608
    }
1609

    
1610
    if(s->picture_structure == PICT_FRAME){
1611
        s->first_field=0;
1612
        s->v_edge_pos= 16*s->mb_height;
1613
    }else{
1614
        s->first_field ^= 1;
1615
        s->v_edge_pos=  8*s->mb_height;
1616
        memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
1617
    }
1618

    
1619
    if(s->alternate_scan){
1620
        ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable  , ff_alternate_vertical_scan);
1621
        ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable  , ff_alternate_vertical_scan);
1622
    }else{
1623
        ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable  , ff_zigzag_direct);
1624
        ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable  , ff_zigzag_direct);
1625
    }
1626

    
1627
    /* composite display not parsed */
1628
    av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1629
    av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1630
    av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1631
    av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1632
    av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1633
    av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1634
    av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1635
    av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1636
    av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1637
}
1638

    
1639
static void exchange_uv(MpegEncContext *s){
1640
    DCTELEM (*tmp)[64];
1641

    
1642
    tmp           = s->pblocks[4];
1643
    s->pblocks[4] = s->pblocks[5];
1644
    s->pblocks[5] = tmp;
1645
}
1646

    
1647
static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size){
1648
    AVCodecContext *avctx= s->avctx;
1649
    Mpeg1Context *s1 = (Mpeg1Context*)s;
1650

    
1651
    /* start frame decoding */
1652
    if(s->first_field || s->picture_structure==PICT_FRAME){
1653
        if(MPV_frame_start(s, avctx) < 0)
1654
            return -1;
1655

    
1656
        ff_er_frame_start(s);
1657

    
1658
        /* first check if we must repeat the frame */
1659
        s->current_picture_ptr->repeat_pict = 0;
1660
        if (s->repeat_first_field) {
1661
            if (s->progressive_sequence) {
1662
                if (s->top_field_first)
1663
                    s->current_picture_ptr->repeat_pict = 4;
1664
                else
1665
                    s->current_picture_ptr->repeat_pict = 2;
1666
            } else if (s->progressive_frame) {
1667
                s->current_picture_ptr->repeat_pict = 1;
1668
            }
1669
        }
1670

    
1671
        *s->current_picture_ptr->pan_scan= s1->pan_scan;
1672

    
1673
        if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1674
            ff_thread_finish_setup(avctx);
1675
    }else{ //second field
1676
            int i;
1677

    
1678
            if(!s->current_picture_ptr){
1679
                av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1680
                return -1;
1681
            }
1682

    
1683
            for(i=0; i<4; i++){
1684
                s->current_picture.data[i] = s->current_picture_ptr->data[i];
1685
                if(s->picture_structure == PICT_BOTTOM_FIELD){
1686
                    s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
1687
                }
1688
            }
1689
    }
1690

    
1691
    if (avctx->hwaccel) {
1692
        if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
1693
            return -1;
1694
    }
1695

    
1696
// MPV_frame_start will call this function too,
1697
// but we need to call it on every field
1698
    if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1699
        if(ff_xvmc_field_start(s,avctx) < 0)
1700
            return -1;
1701

    
1702
    return 0;
1703
}
1704

    
1705
#define DECODE_SLICE_ERROR -1
1706
#define DECODE_SLICE_OK 0
1707

    
1708
/**
1709
 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
1710
 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
1711
 *         DECODE_SLICE_OK if this slice is ok<br>
1712
 */
1713
static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
1714
                             const uint8_t **buf, int buf_size)
1715
{
1716
    MpegEncContext *s = &s1->mpeg_enc_ctx;
1717
    AVCodecContext *avctx= s->avctx;
1718
    const int field_pic= s->picture_structure != PICT_FRAME;
1719
    const int lowres= s->avctx->lowres;
1720

    
1721
    s->resync_mb_x=
1722
    s->resync_mb_y= -1;
1723

    
1724
    assert(mb_y < s->mb_height);
1725

    
1726
    init_get_bits(&s->gb, *buf, buf_size*8);
1727

    
1728
    ff_mpeg1_clean_buffers(s);
1729
    s->interlaced_dct = 0;
1730

    
1731
    s->qscale = get_qscale(s);
1732

    
1733
    if(s->qscale == 0){
1734
        av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1735
        return -1;
1736
    }
1737

    
1738
    /* extra slice info */
1739
    while (get_bits1(&s->gb) != 0) {
1740
        skip_bits(&s->gb, 8);
1741
    }
1742

    
1743
    s->mb_x=0;
1744

    
1745
    if(mb_y==0 && s->codec_tag == AV_RL32("SLIF")){
1746
        skip_bits1(&s->gb);
1747
    }else{
1748
        for(;;) {
1749
            int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1750
            if (code < 0){
1751
                av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1752
                return -1;
1753
            }
1754
            if (code >= 33) {
1755
                if (code == 33) {
1756
                    s->mb_x += 33;
1757
                }
1758
                /* otherwise, stuffing, nothing to do */
1759
            } else {
1760
                s->mb_x += code;
1761
                break;
1762
            }
1763
        }
1764
    }
1765

    
1766
    if(s->mb_x >= (unsigned)s->mb_width){
1767
        av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1768
        return -1;
1769
    }
1770

    
1771
    if (avctx->hwaccel) {
1772
        const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1773
        int start_code = -1;
1774
        buf_end = ff_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1775
        if (buf_end < *buf + buf_size)
1776
            buf_end -= 4;
1777
        s->mb_y = mb_y;
1778
        if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0)
1779
            return DECODE_SLICE_ERROR;
1780
        *buf = buf_end;
1781
        return DECODE_SLICE_OK;
1782
    }
1783

    
1784
    s->resync_mb_x= s->mb_x;
1785
    s->resync_mb_y= s->mb_y= mb_y;
1786
    s->mb_skip_run= 0;
1787
    ff_init_block_index(s);
1788

    
1789
    if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
1790
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
1791
             av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
1792
                 s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1],
1793
                 s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
1794
                 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
1795
                 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
1796
                 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
1797
        }
1798
    }
1799

    
1800
    for(;;) {
1801
        //If 1, we memcpy blocks in xvmcvideo.
1802
        if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1)
1803
            ff_xvmc_init_block(s);//set s->block
1804

    
1805
        if(mpeg_decode_mb(s, s->block) < 0)
1806
            return -1;
1807

    
1808
        if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
1809
            const int wrap = s->b8_stride;
1810
            int xy = s->mb_x*2 + s->mb_y*2*wrap;
1811
            int b8_xy= 4*(s->mb_x + s->mb_y*s->mb_stride);
1812
            int motion_x, motion_y, dir, i;
1813

    
1814
            for(i=0; i<2; i++){
1815
                for(dir=0; dir<2; dir++){
1816
                    if (s->mb_intra || (dir==1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1817
                        motion_x = motion_y = 0;
1818
                    }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
1819
                        motion_x = s->mv[dir][0][0];
1820
                        motion_y = s->mv[dir][0][1];
1821
                    } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1822
                        motion_x = s->mv[dir][i][0];
1823
                        motion_y = s->mv[dir][i][1];
1824
                    }
1825

    
1826
                    s->current_picture.motion_val[dir][xy    ][0] = motion_x;
1827
                    s->current_picture.motion_val[dir][xy    ][1] = motion_y;
1828
                    s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
1829
                    s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
1830
                    s->current_picture.ref_index [dir][b8_xy    ]=
1831
                    s->current_picture.ref_index [dir][b8_xy + 1]= s->field_select[dir][i];
1832
                    assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
1833
                }
1834
                xy += wrap;
1835
                b8_xy +=2;
1836
            }
1837
        }
1838

    
1839
        s->dest[0] += 16 >> lowres;
1840
        s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1841
        s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1842

    
1843
        MPV_decode_mb(s, s->block);
1844

    
1845
        if (++s->mb_x >= s->mb_width) {
1846
            const int mb_size= 16>>s->avctx->lowres;
1847

    
1848
            ff_draw_horiz_band(s, mb_size*(s->mb_y>>field_pic), mb_size);
1849
            MPV_report_decode_progress(s);
1850

    
1851
            s->mb_x = 0;
1852
            s->mb_y += 1<<field_pic;
1853

    
1854
            if(s->mb_y >= s->mb_height){
1855
                int left= get_bits_left(&s->gb);
1856
                int is_d10= s->chroma_format==2 && s->pict_type==AV_PICTURE_TYPE_I && avctx->profile==0 && avctx->level==5
1857
                            && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
1858
                            && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
1859

    
1860
                if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
1861
                   || (avctx->error_recognition >= FF_ER_AGGRESSIVE && left>8)){
1862
                    av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
1863
                    return -1;
1864
                }else
1865
                    goto eos;
1866
            }
1867

    
1868
            ff_init_block_index(s);
1869
        }
1870

    
1871
        /* skip mb handling */
1872
        if (s->mb_skip_run == -1) {
1873
            /* read increment again */
1874
            s->mb_skip_run = 0;
1875
            for(;;) {
1876
                int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
1877
                if (code < 0){
1878
                    av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1879
                    return -1;
1880
                }
1881
                if (code >= 33) {
1882
                    if (code == 33) {
1883
                        s->mb_skip_run += 33;
1884
                    }else if(code == 35){
1885
                        if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
1886
                            av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1887
                            return -1;
1888
                        }
1889
                        goto eos; /* end of slice */
1890
                    }
1891
                    /* otherwise, stuffing, nothing to do */
1892
                } else {
1893
                    s->mb_skip_run += code;
1894
                    break;
1895
                }
1896
            }
1897
            if(s->mb_skip_run){
1898
                int i;
1899
                if(s->pict_type == AV_PICTURE_TYPE_I){
1900
                    av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1901
                    return -1;
1902
                }
1903

    
1904
                /* skip mb */
1905
                s->mb_intra = 0;
1906
                for(i=0;i<12;i++)
1907
                    s->block_last_index[i] = -1;
1908
                if(s->picture_structure == PICT_FRAME)
1909
                    s->mv_type = MV_TYPE_16X16;
1910
                else
1911
                    s->mv_type = MV_TYPE_FIELD;
1912
                if (s->pict_type == AV_PICTURE_TYPE_P) {
1913
                    /* if P type, zero motion vector is implied */
1914
                    s->mv_dir = MV_DIR_FORWARD;
1915
                    s->mv[0][0][0] = s->mv[0][0][1] = 0;
1916
                    s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1917
                    s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1918
                    s->field_select[0][0]= (s->picture_structure - 1) & 1;
1919
                } else {
1920
                    /* if B type, reuse previous vectors and directions */
1921
                    s->mv[0][0][0] = s->last_mv[0][0][0];
1922
                    s->mv[0][0][1] = s->last_mv[0][0][1];
1923
                    s->mv[1][0][0] = s->last_mv[1][0][0];
1924
                    s->mv[1][0][1] = s->last_mv[1][0][1];
1925
                }
1926
            }
1927
        }
1928
    }
1929
eos: // end of slice
1930
    *buf += (get_bits_count(&s->gb)-1)/8;
1931
//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1932
    return 0;
1933
}
1934

    
1935
static int slice_decode_thread(AVCodecContext *c, void *arg){
1936
    MpegEncContext *s= *(void**)arg;
1937
    const uint8_t *buf= s->gb.buffer;
1938
    int mb_y= s->start_mb_y;
1939
    const int field_pic= s->picture_structure != PICT_FRAME;
1940

    
1941
    s->error_count= (3*(s->end_mb_y - s->start_mb_y)*s->mb_width) >> field_pic;
1942

    
1943
    for(;;){
1944
        uint32_t start_code;
1945
        int ret;
1946

    
1947
        ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
1948
        emms_c();
1949
//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1950
//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
1951
        if(ret < 0){
1952
            if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
1953
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
1954
        }else{
1955
            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
1956
        }
1957

    
1958
        if(s->mb_y == s->end_mb_y)
1959
            return 0;
1960

    
1961
        start_code= -1;
1962
        buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
1963
        mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
1964
        if (s->picture_structure == PICT_BOTTOM_FIELD)
1965
            mb_y++;
1966
        if(mb_y < 0 || mb_y >= s->end_mb_y)
1967
            return -1;
1968
    }
1969

    
1970
    return 0; //not reached
1971
}
1972

    
1973
/**
1974
 * Handle slice ends.
1975
 * @return 1 if it seems to be the last slice
1976
 */
1977
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
1978
{
1979
    Mpeg1Context *s1 = avctx->priv_data;
1980
    MpegEncContext *s = &s1->mpeg_enc_ctx;
1981

    
1982
    if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
1983
        return 0;
1984

    
1985
    if (s->avctx->hwaccel) {
1986
        if (s->avctx->hwaccel->end_frame(s->avctx) < 0)
1987
            av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1988
    }
1989

    
1990
    if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1991
        ff_xvmc_field_end(s);
1992

    
1993
    /* end of slice reached */
1994
    if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
1995
        /* end of image */
1996

    
1997
        s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
1998

    
1999
        ff_er_frame_end(s);
2000

    
2001
        MPV_frame_end(s);
2002

    
2003
        if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
2004
            *pict= *(AVFrame*)s->current_picture_ptr;
2005
            ff_print_debug_info(s, pict);
2006
        } else {
2007
            if (avctx->active_thread_type&FF_THREAD_FRAME)
2008
                s->picture_number++;
2009
            /* latency of 1 frame for I- and P-frames */
2010
            /* XXX: use another variable than picture_number */
2011
            if (s->last_picture_ptr != NULL) {
2012
                *pict= *(AVFrame*)s->last_picture_ptr;
2013
                 ff_print_debug_info(s, pict);
2014
            }
2015
        }
2016

    
2017
        return 1;
2018
    } else {
2019
        return 0;
2020
    }
2021
}
2022

    
2023
static int mpeg1_decode_sequence(AVCodecContext *avctx,
2024
                                 const uint8_t *buf, int buf_size)
2025
{
2026
    Mpeg1Context *s1 = avctx->priv_data;
2027
    MpegEncContext *s = &s1->mpeg_enc_ctx;
2028
    int width,height;
2029
    int i, v, j;
2030

    
2031
    init_get_bits(&s->gb, buf, buf_size*8);
2032

    
2033
    width = get_bits(&s->gb, 12);
2034
    height = get_bits(&s->gb, 12);
2035
    if (width <= 0 || height <= 0)
2036
        return -1;
2037
    s->aspect_ratio_info= get_bits(&s->gb, 4);
2038
    if (s->aspect_ratio_info == 0) {
2039
        av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
2040
        if (avctx->error_recognition >= FF_ER_COMPLIANT)
2041
            return -1;
2042
    }
2043
    s->frame_rate_index = get_bits(&s->gb, 4);
2044
    if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2045
        return -1;
2046
    s->bit_rate = get_bits(&s->gb, 18) * 400;
2047
    if (get_bits1(&s->gb) == 0) /* marker */
2048
        return -1;
2049
    s->width = width;
2050
    s->height = height;
2051

    
2052
    s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2053
    skip_bits(&s->gb, 1);
2054

    
2055
    /* get matrix */
2056
    if (get_bits1(&s->gb)) {
2057
        load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
2058
    } else {
2059
        for(i=0;i<64;i++) {
2060
            j = s->dsp.idct_permutation[i];
2061
            v = ff_mpeg1_default_intra_matrix[i];
2062
            s->intra_matrix[j] = v;
2063
            s->chroma_intra_matrix[j] = v;
2064
        }
2065
    }
2066
    if (get_bits1(&s->gb)) {
2067
        load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
2068
    } else {
2069
        for(i=0;i<64;i++) {
2070
            int j= s->dsp.idct_permutation[i];
2071
            v = ff_mpeg1_default_non_intra_matrix[i];
2072
            s->inter_matrix[j] = v;
2073
            s->chroma_inter_matrix[j] = v;
2074
        }
2075
    }
2076

    
2077
    if(show_bits(&s->gb, 23) != 0){
2078
        av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2079
        return -1;
2080
    }
2081

    
2082
    /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2083
    s->progressive_sequence = 1;
2084
    s->progressive_frame = 1;
2085
    s->picture_structure = PICT_FRAME;
2086
    s->frame_pred_frame_dct = 1;
2087
    s->chroma_format = 1;
2088
    s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2089
    avctx->sub_id = 1; /* indicates MPEG-1 */
2090
    s->out_format = FMT_MPEG1;
2091
    s->swap_uv = 0;//AFAIK VCR2 does not have SEQ_HEADER
2092
    if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2093

    
2094
    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2095
        av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2096
               s->avctx->rc_buffer_size, s->bit_rate);
2097

    
2098
    return 0;
2099
}
2100

    
2101
static int vcr2_init_sequence(AVCodecContext *avctx)
2102
{
2103
    Mpeg1Context *s1 = avctx->priv_data;
2104
    MpegEncContext *s = &s1->mpeg_enc_ctx;
2105
    int i, v;
2106

    
2107
    /* start new MPEG-1 context decoding */
2108
    s->out_format = FMT_MPEG1;
2109
    if (s1->mpeg_enc_ctx_allocated) {
2110
        MPV_common_end(s);
2111
    }
2112
    s->width  = avctx->coded_width;
2113
    s->height = avctx->coded_height;
2114
    avctx->has_b_frames= 0; //true?
2115
    s->low_delay= 1;
2116

    
2117
    avctx->pix_fmt = mpeg_get_pixelformat(avctx);
2118
    avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
2119

    
2120
    if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel )
2121
        if( avctx->idct_algo == FF_IDCT_AUTO )
2122
            avctx->idct_algo = FF_IDCT_SIMPLE;
2123

    
2124
    if (MPV_common_init(s) < 0)
2125
        return -1;
2126
    exchange_uv(s);//common init reset pblocks, so we swap them here
2127
    s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2128
    s1->mpeg_enc_ctx_allocated = 1;
2129

    
2130
    for(i=0;i<64;i++) {
2131
        int j= s->dsp.idct_permutation[i];
2132
        v = ff_mpeg1_default_intra_matrix[i];
2133
        s->intra_matrix[j] = v;
2134
        s->chroma_intra_matrix[j] = v;
2135

    
2136
        v = ff_mpeg1_default_non_intra_matrix[i];
2137
        s->inter_matrix[j] = v;
2138
        s->chroma_inter_matrix[j] = v;
2139
    }
2140

    
2141
    s->progressive_sequence = 1;
2142
    s->progressive_frame = 1;
2143
    s->picture_structure = PICT_FRAME;
2144
    s->frame_pred_frame_dct = 1;
2145
    s->chroma_format = 1;
2146
    s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2147
    avctx->sub_id = 2; /* indicates MPEG-2 */
2148
    s1->save_width           = s->width;
2149
    s1->save_height          = s->height;
2150
    s1->save_progressive_seq = s->progressive_sequence;
2151
    return 0;
2152
}
2153

    
2154

    
2155
static void mpeg_decode_user_data(AVCodecContext *avctx,
2156
                                  const uint8_t *p, int buf_size)
2157
{
2158
    const uint8_t *buf_end = p+buf_size;
2159

    
2160
    /* we parse the DTG active format information */
2161
    if (buf_end - p >= 5 &&
2162
        p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2163
        int flags = p[4];
2164
        p += 5;
2165
        if (flags & 0x80) {
2166
            /* skip event id */
2167
            p += 2;
2168
        }
2169
        if (flags & 0x40) {
2170
            if (buf_end - p < 1)
2171
                return;
2172
            avctx->dtg_active_format = p[0] & 0x0f;
2173
        }
2174
    }
2175
}
2176

    
2177
static void mpeg_decode_gop(AVCodecContext *avctx,
2178
                            const uint8_t *buf, int buf_size){
2179
    Mpeg1Context *s1 = avctx->priv_data;
2180
    MpegEncContext *s = &s1->mpeg_enc_ctx;
2181

    
2182
    int drop_frame_flag;
2183
    int time_code_hours, time_code_minutes;
2184
    int time_code_seconds, time_code_pictures;
2185
    int broken_link;
2186

    
2187
    init_get_bits(&s->gb, buf, buf_size*8);
2188

    
2189
    drop_frame_flag = get_bits1(&s->gb);
2190

    
2191
    time_code_hours=get_bits(&s->gb,5);
2192
    time_code_minutes = get_bits(&s->gb,6);
2193
    skip_bits1(&s->gb);//marker bit
2194
    time_code_seconds = get_bits(&s->gb,6);
2195
    time_code_pictures = get_bits(&s->gb,6);
2196

    
2197
    s->closed_gop = get_bits1(&s->gb);
2198
    /*broken_link indicate that after editing the
2199
      reference frames of the first B-Frames after GOP I-Frame
2200
      are missing (open gop)*/
2201
    broken_link = get_bits1(&s->gb);
2202

    
2203
    if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2204
        av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2205
            time_code_hours, time_code_minutes, time_code_seconds,
2206
            time_code_pictures, s->closed_gop, broken_link);
2207
}
2208
/**
2209
 * Find the end of the current frame in the bitstream.
2210
 * @return the position of the first byte of the next frame, or -1
2211
 */
2212
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s)
2213
{
2214
    int i;
2215
    uint32_t state= pc->state;
2216

    
2217
    /* EOF considered as end of frame */
2218
    if (buf_size == 0)
2219
        return 0;
2220

    
2221
/*
2222
 0  frame start         -> 1/4
2223
 1  first_SEQEXT        -> 0/2
2224
 2  first field start   -> 3/0
2225
 3  second_SEQEXT       -> 2/0
2226
 4  searching end
2227
*/
2228

    
2229
    for(i=0; i<buf_size; i++){
2230
        assert(pc->frame_start_found>=0 && pc->frame_start_found<=4);
2231
        if(pc->frame_start_found&1){
2232
            if(state == EXT_START_CODE && (buf[i]&0xF0) != 0x80)
2233
                pc->frame_start_found--;
2234
            else if(state == EXT_START_CODE+2){
2235
                if((buf[i]&3) == 3) pc->frame_start_found= 0;
2236
                else                pc->frame_start_found= (pc->frame_start_found+1)&3;
2237
            }
2238
            state++;
2239
        }else{
2240
            i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
2241
            if(pc->frame_start_found==0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2242
                i++;
2243
                pc->frame_start_found=4;
2244
            }
2245
            if(state == SEQ_END_CODE){
2246
                pc->state=-1;
2247
                return i+1;
2248
            }
2249
            if(pc->frame_start_found==2 && state == SEQ_START_CODE)
2250
                pc->frame_start_found= 0;
2251
            if(pc->frame_start_found<4 && state == EXT_START_CODE)
2252
                pc->frame_start_found++;
2253
            if(pc->frame_start_found == 4 && (state&0xFFFFFF00) == 0x100){
2254
                if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2255
                    pc->frame_start_found=0;
2256
                    pc->state=-1;
2257
                    return i-3;
2258
                }
2259
            }
2260
            if(pc->frame_start_found == 0 && s && state == PICTURE_START_CODE){
2261
                ff_fetch_timestamp(s, i-3, 1);
2262
            }
2263
        }
2264
    }
2265
    pc->state= state;
2266
    return END_NOT_FOUND;
2267
}
2268

    
2269
static int decode_chunks(AVCodecContext *avctx,
2270
                             AVFrame *picture, int *data_size,
2271
                             const uint8_t *buf, int buf_size);
2272

    
2273
/* handle buffering and image synchronisation */
2274
static int mpeg_decode_frame(AVCodecContext *avctx,
2275
                             void *data, int *data_size,
2276
                             AVPacket *avpkt)
2277
{
2278
    const uint8_t *buf = avpkt->data;
2279
    int buf_size = avpkt->size;
2280
    Mpeg1Context *s = avctx->priv_data;
2281
    AVFrame *picture = data;
2282
    MpegEncContext *s2 = &s->mpeg_enc_ctx;
2283
    av_dlog(avctx, "fill_buffer\n");
2284

    
2285
    if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2286
        /* special case for last picture */
2287
        if (s2->low_delay==0 && s2->next_picture_ptr) {
2288
            *picture= *(AVFrame*)s2->next_picture_ptr;
2289
            s2->next_picture_ptr= NULL;
2290

    
2291
            *data_size = sizeof(AVFrame);
2292
        }
2293
        return buf_size;
2294
    }
2295

    
2296
    if(s2->flags&CODEC_FLAG_TRUNCATED){
2297
        int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
2298

    
2299
        if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
2300
            return buf_size;
2301
    }
2302

    
2303
#if 0
2304
    if (s->repeat_field % 2 == 1) {
2305
        s->repeat_field++;
2306
        //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2307
        //        s2->picture_number, s->repeat_field);
2308
        if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2309
            *data_size = sizeof(AVPicture);
2310
            goto the_end;
2311
        }
2312
    }
2313
#endif
2314

    
2315
    if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == AV_RL32("VCR2"))
2316
        vcr2_init_sequence(avctx);
2317

    
2318
    s->slice_count= 0;
2319

    
2320
    if(avctx->extradata && !avctx->frame_number)
2321
        decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
2322

    
2323
    return decode_chunks(avctx, picture, data_size, buf, buf_size);
2324
}
2325

    
2326
static int decode_chunks(AVCodecContext *avctx,
2327
                             AVFrame *picture, int *data_size,
2328
                             const uint8_t *buf, int buf_size)
2329
{
2330
    Mpeg1Context *s = avctx->priv_data;
2331
    MpegEncContext *s2 = &s->mpeg_enc_ctx;
2332
    const uint8_t *buf_ptr = buf;
2333
    const uint8_t *buf_end = buf + buf_size;
2334
    int ret, input_size;
2335
    int last_code= 0;
2336

    
2337
    for(;;) {
2338
        /* find next start code */
2339
        uint32_t start_code = -1;
2340
        buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
2341
        if (start_code > 0x1ff){
2342
            if(s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT){
2343
                if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
2344
                    int i;
2345

    
2346
                    avctx->execute(avctx, slice_decode_thread,  &s2->thread_context[0], NULL, s->slice_count, sizeof(void*));
2347
                    for(i=0; i<s->slice_count; i++)
2348
                        s2->error_count += s2->thread_context[i]->error_count;
2349
                }
2350

    
2351
                if (CONFIG_VDPAU && uses_vdpau(avctx))
2352
                    ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
2353

    
2354
                if (slice_end(avctx, picture)) {
2355
                    if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2356
                        *data_size = sizeof(AVPicture);
2357
                }
2358
            }
2359
            s2->pict_type= 0;
2360
            return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2361
        }
2362

    
2363
        input_size = buf_end - buf_ptr;
2364

    
2365
        if(avctx->debug & FF_DEBUG_STARTCODE){
2366
            av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
2367
        }
2368

    
2369
        /* prepare data for next start code */
2370
        switch(start_code) {
2371
        case SEQ_START_CODE:
2372
            if(last_code == 0){
2373
            mpeg1_decode_sequence(avctx, buf_ptr,
2374
                                    input_size);
2375
                s->sync=1;
2376
            }else{
2377
                av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
2378
            }
2379
            break;
2380

    
2381
        case PICTURE_START_CODE:
2382
            if (HAVE_THREADS && (avctx->active_thread_type&FF_THREAD_SLICE) && s->slice_count) {
2383
                int i;
2384

    
2385
                avctx->execute(avctx, slice_decode_thread,
2386
                               s2->thread_context, NULL,
2387
                               s->slice_count, sizeof(void*));
2388
                for (i = 0; i < s->slice_count; i++)
2389
                    s2->error_count += s2->thread_context[i]->error_count;
2390
                s->slice_count = 0;
2391
            }
2392
            if(last_code == 0 || last_code == SLICE_MIN_START_CODE){
2393
            if(mpeg_decode_postinit(avctx) < 0){
2394
                av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
2395
                return -1;
2396
            }
2397

    
2398
            /* we have a complete image: we try to decompress it */
2399
            if(mpeg1_decode_picture(avctx,
2400
                                    buf_ptr, input_size) < 0)
2401
                s2->pict_type=0;
2402
                s2->first_slice = 1;
2403
            last_code= PICTURE_START_CODE;
2404
            }else{
2405
                av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
2406
            }
2407
            break;
2408
        case EXT_START_CODE:
2409
            init_get_bits(&s2->gb, buf_ptr, input_size*8);
2410

    
2411
            switch(get_bits(&s2->gb, 4)) {
2412
            case 0x1:
2413
                if(last_code == 0){
2414
                mpeg_decode_sequence_extension(s);
2415
                }else{
2416
                    av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
2417
                }
2418
                break;
2419
            case 0x2:
2420
                mpeg_decode_sequence_display_extension(s);
2421
                break;
2422
            case 0x3:
2423
                mpeg_decode_quant_matrix_extension(s2);
2424
                break;
2425
            case 0x7:
2426
                mpeg_decode_picture_display_extension(s);
2427
                break;
2428
            case 0x8:
2429
                if(last_code == PICTURE_START_CODE){
2430
                mpeg_decode_picture_coding_extension(s);
2431
                }else{
2432
                    av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
2433
                }
2434
                break;
2435
            }
2436
            break;
2437
        case USER_START_CODE:
2438
            mpeg_decode_user_data(avctx,
2439
                                    buf_ptr, input_size);
2440
            break;
2441
        case GOP_START_CODE:
2442
            if(last_code == 0){
2443
            s2->first_field=0;
2444
            mpeg_decode_gop(avctx,
2445
                                    buf_ptr, input_size);
2446
                s->sync=1;
2447
            }else{
2448
                av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
2449
            }
2450
            break;
2451
        default:
2452
            if (start_code >= SLICE_MIN_START_CODE &&
2453
                start_code <= SLICE_MAX_START_CODE && last_code!=0) {
2454
                const int field_pic= s2->picture_structure != PICT_FRAME;
2455
                int mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
2456
                last_code= SLICE_MIN_START_CODE;
2457

    
2458
                if(s2->picture_structure == PICT_BOTTOM_FIELD)
2459
                    mb_y++;
2460

    
2461
                if (mb_y >= s2->mb_height){
2462
                    av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2463
                    return -1;
2464
                }
2465

    
2466
                if(s2->last_picture_ptr==NULL){
2467
                /* Skip B-frames if we do not have reference frames and gop is not closed */
2468
                    if(s2->pict_type==AV_PICTURE_TYPE_B){
2469
                        if(!s2->closed_gop)
2470
                            break;
2471
                    }
2472
                }
2473
                if(s2->pict_type==AV_PICTURE_TYPE_I)
2474
                    s->sync=1;
2475
                if(s2->next_picture_ptr==NULL){
2476
                /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2477
                    if(s2->pict_type==AV_PICTURE_TYPE_P && !s->sync) break;
2478
                }
2479
                if(  (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==AV_PICTURE_TYPE_B)
2480
                    ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=AV_PICTURE_TYPE_I)
2481
                    || avctx->skip_frame >= AVDISCARD_ALL)
2482
                    break;
2483

    
2484
                if (!s->mpeg_enc_ctx_allocated) break;
2485

    
2486
                if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
2487
                    if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2488
                        break;
2489
                }
2490

    
2491
                if(!s2->pict_type){
2492
                    av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2493
                    break;
2494
                }
2495

    
2496
                if(s2->first_slice){
2497
                    s2->first_slice=0;
2498
                    if(mpeg_field_start(s2, buf, buf_size) < 0)
2499
                        return -1;
2500
                }
2501
                if(!s2->current_picture_ptr){
2502
                    av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
2503
                    return -1;
2504
                }
2505

    
2506
                if (uses_vdpau(avctx)) {
2507
                    s->slice_count++;
2508
                    break;
2509
                }
2510

    
2511
                if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
2512
                    int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2513
                    if(threshold <= mb_y){
2514
                        MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2515

    
2516
                        thread_context->start_mb_y= mb_y;
2517
                        thread_context->end_mb_y  = s2->mb_height;
2518
                        if(s->slice_count){
2519
                            s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2520
                            ff_update_duplicate_context(thread_context, s2);
2521
                        }
2522
                        init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2523
                        s->slice_count++;
2524
                    }
2525
                    buf_ptr += 2; //FIXME add minimum number of bytes per slice
2526
                }else{
2527
                    ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2528
                    emms_c();
2529

    
2530
                    if(ret < 0){
2531
                        if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2532
                            ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
2533
                    }else{
2534
                        ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
2535
                    }
2536
                }
2537
            }
2538
            break;
2539
        }
2540
    }
2541
}
2542

    
2543
static void flush(AVCodecContext *avctx){
2544
    Mpeg1Context *s = avctx->priv_data;
2545

    
2546
    s->sync=0;
2547

    
2548
    ff_mpeg_flush(avctx);
2549
}
2550

    
2551
static int mpeg_decode_end(AVCodecContext *avctx)
2552
{
2553
    Mpeg1Context *s = avctx->priv_data;
2554

    
2555
    if (s->mpeg_enc_ctx_allocated)
2556
        MPV_common_end(&s->mpeg_enc_ctx);
2557
    return 0;
2558
}
2559

    
2560
static const AVProfile mpeg2_video_profiles[] = {
2561
    { FF_PROFILE_MPEG2_422,          "4:2:2"              },
2562
    { FF_PROFILE_MPEG2_HIGH,         "High"               },
2563
    { FF_PROFILE_MPEG2_SS,           "Spatially Scalable" },
2564
    { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable"       },
2565
    { FF_PROFILE_MPEG2_MAIN,         "Main"               },
2566
    { FF_PROFILE_MPEG2_SIMPLE,       "Simple"             },
2567
    { FF_PROFILE_RESERVED,           "Reserved"           },
2568
    { FF_PROFILE_RESERVED,           "Reserved"           },
2569
    { FF_PROFILE_UNKNOWN },
2570
};
2571

    
2572

    
2573
AVCodec ff_mpeg1video_decoder = {
2574
    "mpeg1video",
2575
    AVMEDIA_TYPE_VIDEO,
2576
    CODEC_ID_MPEG1VIDEO,
2577
    sizeof(Mpeg1Context),
2578
    mpeg_decode_init,
2579
    NULL,
2580
    mpeg_decode_end,
2581
    mpeg_decode_frame,
2582
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
2583
    .flush= flush,
2584
    .max_lowres= 3,
2585
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2586
    .update_thread_context= ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
2587
};
2588

    
2589
AVCodec ff_mpeg2video_decoder = {
2590
    "mpeg2video",
2591
    AVMEDIA_TYPE_VIDEO,
2592
    CODEC_ID_MPEG2VIDEO,
2593
    sizeof(Mpeg1Context),
2594
    mpeg_decode_init,
2595
    NULL,
2596
    mpeg_decode_end,
2597
    mpeg_decode_frame,
2598
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2599
    .flush= flush,
2600
    .max_lowres= 3,
2601
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2602
    .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
2603
};
2604

    
2605
//legacy decoder
2606
AVCodec ff_mpegvideo_decoder = {
2607
    "mpegvideo",
2608
    AVMEDIA_TYPE_VIDEO,
2609
    CODEC_ID_MPEG2VIDEO,
2610
    sizeof(Mpeg1Context),
2611
    mpeg_decode_init,
2612
    NULL,
2613
    mpeg_decode_end,
2614
    mpeg_decode_frame,
2615
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
2616
    .flush= flush,
2617
    .max_lowres= 3,
2618
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2619
};
2620

    
2621
#if CONFIG_MPEG_XVMC_DECODER
2622
static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx){
2623
    if( avctx->active_thread_type & FF_THREAD_SLICE )
2624
        return -1;
2625
    if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2626
        return -1;
2627
    if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2628
        av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2629
    }
2630
    mpeg_decode_init(avctx);
2631

    
2632
    avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2633
    avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2634

    
2635
    return 0;
2636
}
2637

    
2638
AVCodec ff_mpeg_xvmc_decoder = {
2639
    "mpegvideo_xvmc",
2640
    AVMEDIA_TYPE_VIDEO,
2641
    CODEC_ID_MPEG2VIDEO_XVMC,
2642
    sizeof(Mpeg1Context),
2643
    mpeg_mc_decode_init,
2644
    NULL,
2645
    mpeg_decode_end,
2646
    mpeg_decode_frame,
2647
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
2648
    .flush= flush,
2649
    .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2650
};
2651

    
2652
#endif
2653

    
2654
#if CONFIG_MPEG_VDPAU_DECODER
2655
AVCodec ff_mpeg_vdpau_decoder = {
2656
    "mpegvideo_vdpau",
2657
    AVMEDIA_TYPE_VIDEO,
2658
    CODEC_ID_MPEG2VIDEO,
2659
    sizeof(Mpeg1Context),
2660
    mpeg_decode_init,
2661
    NULL,
2662
    mpeg_decode_end,
2663
    mpeg_decode_frame,
2664
    CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2665
    .flush= flush,
2666
    .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2667
};
2668
#endif
2669

    
2670
#if CONFIG_MPEG1_VDPAU_DECODER
2671
AVCodec ff_mpeg1_vdpau_decoder = {
2672
    "mpeg1video_vdpau",
2673
    AVMEDIA_TYPE_VIDEO,
2674
    CODEC_ID_MPEG1VIDEO,
2675
    sizeof(Mpeg1Context),
2676
    mpeg_decode_init,
2677
    NULL,
2678
    mpeg_decode_end,
2679
    mpeg_decode_frame,
2680
    CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY,
2681
    .flush= flush,
2682
    .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
2683
};
2684
#endif
2685