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ffmpeg / libavcodec / indeo5.c @ 72415b2a

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1
/*
2
 * Indeo Video Interactive v5 compatible decoder
3
 * Copyright (c) 2009 Maxim Poliakovski
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * 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
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 */
21

    
22
/**
23
 * @file libavcodec/indeo5.c
24
 * Indeo Video Interactive version 5 decoder
25
 *
26
 * Indeo5 data is usually transported within .avi or .mov files.
27
 * Known FOURCCs: 'IV50'
28
 */
29

    
30
#define ALT_BITSTREAM_READER_LE
31
#include "avcodec.h"
32
#include "get_bits.h"
33
#include "dsputil.h"
34
#include "ivi_dsp.h"
35
#include "ivi_common.h"
36
#include "indeo5data.h"
37

    
38
/**
39
 *  Indeo5 frame types.
40
 */
41
enum {
42
    FRAMETYPE_INTRA       = 0,
43
    FRAMETYPE_INTER       = 1,  ///< non-droppable P-frame
44
    FRAMETYPE_INTER_SCAL  = 2,  ///< droppable P-frame used in the scalability mode
45
    FRAMETYPE_INTER_NOREF = 3,  ///< droppable P-frame
46
    FRAMETYPE_NULL        = 4   ///< empty frame with no data
47
};
48

    
49
#define IVI5_PIC_SIZE_ESC       15
50

    
51
#define IVI5_IS_PROTECTED       0x20
52

    
53
typedef struct {
54
    GetBitContext   gb;
55
    AVFrame         frame;
56
    RVMapDesc       rvmap_tabs[9];   ///< local corrected copy of the static rvmap tables
57
    IVIPlaneDesc    planes[3];       ///< color planes
58
    const uint8_t   *frame_data;     ///< input frame data pointer
59
    int             buf_switch;      ///< used to switch between three buffers
60
    int             inter_scal;      ///< signals a sequence of scalable inter frames
61
    int             dst_buf;         ///< buffer index for the currently decoded frame
62
    int             ref_buf;         ///< inter frame reference buffer index
63
    int             ref2_buf;        ///< temporal storage for switching buffers
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    uint32_t        frame_size;      ///< frame size in bytes
65
    int             frame_type;
66
    int             prev_frame_type; ///< frame type of the previous frame
67
    int             frame_num;
68
    uint32_t        pic_hdr_size;    ///< picture header size in bytes
69
    uint8_t         frame_flags;
70
    uint16_t        checksum;        ///< frame checksum
71

    
72
    IVIHuffTab      mb_vlc;          ///< vlc table for decoding macroblock data
73

    
74
    uint16_t        gop_hdr_size;
75
    uint8_t         gop_flags;
76
    int             is_scalable;
77
    uint32_t        lock_word;
78
    IVIPicConfig    pic_conf;
79
} IVI5DecContext;
80

    
81

    
82
/**
83
 *  Decodes Indeo5 GOP (Group of pictures) header.
84
 *  This header is present in key frames only.
85
 *  It defines parameters for all frames in a GOP.
86
 *
87
 *  @param ctx      [in,out] ptr to the decoder context
88
 *  @param avctx    [in] ptr to the AVCodecContext
89
 *  @return         result code: 0 = OK, -1 = error
90
 */
91
static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
92
{
93
    int             result, i, p, tile_size, pic_size_indx, mb_size, blk_size, blk_size_changed = 0;
94
    IVIBandDesc     *band, *band1, *band2;
95
    IVIPicConfig    pic_conf;
96

    
97
    ctx->gop_flags = get_bits(&ctx->gb, 8);
98

    
99
    ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
100

    
101
    if (ctx->gop_flags & IVI5_IS_PROTECTED)
102
        ctx->lock_word = get_bits_long(&ctx->gb, 32);
103

    
104
    tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
105
    if (tile_size > 256) {
106
        av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
107
        return -1;
108
    }
109

    
110
    /* decode number of wavelet bands */
111
    /* num_levels * 3 + 1 */
112
    pic_conf.luma_bands   = get_bits(&ctx->gb, 2) * 3 + 1;
113
    pic_conf.chroma_bands = get_bits1(&ctx->gb)   * 3 + 1;
114
    ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
115
    if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
116
        av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
117
               pic_conf.luma_bands, pic_conf.chroma_bands);
118
        return -1;
119
    }
120

    
121
    pic_size_indx = get_bits(&ctx->gb, 4);
122
    if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
123
        pic_conf.pic_height = get_bits(&ctx->gb, 13);
124
        pic_conf.pic_width  = get_bits(&ctx->gb, 13);
125
    } else {
126
        pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
127
        pic_conf.pic_width  = ivi5_common_pic_sizes[pic_size_indx * 2    ] << 2;
128
    }
129

    
130
    if (ctx->gop_flags & 2) {
131
        av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
132
        return -1;
133
    }
134

    
135
    pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
136
    pic_conf.chroma_width  = (pic_conf.pic_width  + 3) >> 2;
137

    
138
    if (!tile_size) {
139
        pic_conf.tile_height = pic_conf.pic_height;
140
        pic_conf.tile_width  = pic_conf.pic_width;
141
    } else {
142
        pic_conf.tile_height = pic_conf.tile_width = tile_size;
143
    }
144

    
145
    /* check if picture layout was changed and reallocate buffers */
146
    if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
147
        result = ff_ivi_init_planes(ctx->planes, &pic_conf);
148
        if (result) {
149
            av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
150
            return -1;
151
        }
152
        ctx->pic_conf = pic_conf;
153
        blk_size_changed = 1; /* force reallocation of the internal structures */
154
    }
155

    
156
    for (p = 0; p <= 1; p++) {
157
        for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
158
            band = &ctx->planes[p].bands[i];
159

    
160
            band->is_halfpel = get_bits1(&ctx->gb);
161

    
162
            mb_size  = get_bits1(&ctx->gb);
163
            blk_size = 8 >> get_bits1(&ctx->gb);
164
            mb_size  = blk_size << !mb_size;
165

    
166
            blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
167
            if (blk_size_changed) {
168
                band->mb_size  = mb_size;
169
                band->blk_size = blk_size;
170
            }
171

    
172
            if (get_bits1(&ctx->gb)) {
173
                av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
174
                return -1;
175
            }
176

    
177
            /* select transform function and scan pattern according to plane and band number */
178
            switch ((p << 2) + i) {
179
            case 0:
180
                band->inv_transform = ff_ivi_inverse_slant_8x8;
181
                band->dc_transform  = ff_ivi_dc_slant_2d;
182
                band->scan          = ff_zigzag_direct;
183
                break;
184

    
185
            case 1:
186
                band->inv_transform = ff_ivi_row_slant8;
187
                band->dc_transform  = ff_ivi_dc_row_slant;
188
                band->scan          = ivi5_scans8x8[0];
189
                break;
190

    
191
            case 2:
192
                band->inv_transform = ff_ivi_col_slant8;
193
                band->dc_transform  = ff_ivi_dc_col_slant;
194
                band->scan          = ivi5_scans8x8[1];
195
                break;
196

    
197
            case 3:
198
                band->inv_transform = ff_ivi_put_pixels_8x8;
199
                band->dc_transform  = ff_ivi_put_dc_pixel_8x8;
200
                band->scan          = ivi5_scans8x8[1];
201
                break;
202

    
203
            case 4:
204
                band->inv_transform = ff_ivi_inverse_slant_4x4;
205
                band->dc_transform  = ff_ivi_dc_slant_2d;
206
                band->scan          = ivi5_scan4x4;
207
                break;
208
            }
209

    
210
            band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
211
                                band->inv_transform == ff_ivi_inverse_slant_4x4;
212

    
213
            /* select dequant matrix according to plane and band number */
214
            if (!p) {
215
                band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
216
            } else {
217
                band->quant_mat = 5;
218
            }
219

    
220
            if (get_bits(&ctx->gb, 2)) {
221
                av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
222
                return -1;
223
            }
224
        }
225
    }
226

    
227
    /* copy chroma parameters into the 2nd chroma plane */
228
    for (i = 0; i < pic_conf.chroma_bands; i++) {
229
        band1 = &ctx->planes[1].bands[i];
230
        band2 = &ctx->planes[2].bands[i];
231

    
232
        band2->width         = band1->width;
233
        band2->height        = band1->height;
234
        band2->mb_size       = band1->mb_size;
235
        band2->blk_size      = band1->blk_size;
236
        band2->is_halfpel    = band1->is_halfpel;
237
        band2->quant_mat     = band1->quant_mat;
238
        band2->scan          = band1->scan;
239
        band2->inv_transform = band1->inv_transform;
240
        band2->dc_transform  = band1->dc_transform;
241
        band2->is_2d_trans   = band1->is_2d_trans;
242
    }
243

    
244
    /* reallocate internal structures if needed */
245
    if (blk_size_changed) {
246
        result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
247
                                   pic_conf.tile_height);
248
        if (result) {
249
            av_log(avctx, AV_LOG_ERROR,
250
                   "Couldn't reallocate internal structures!\n");
251
            return -1;
252
        }
253
    }
254

    
255
    if (ctx->gop_flags & 8) {
256
        if (get_bits(&ctx->gb, 3)) {
257
            av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
258
            return -1;
259
        }
260

    
261
        if (get_bits1(&ctx->gb))
262
            skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
263
    }
264

    
265
    align_get_bits(&ctx->gb);
266

    
267
    skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
268

    
269
    /* skip GOP extension if any */
270
    if (get_bits1(&ctx->gb)) {
271
        do {
272
            i = get_bits(&ctx->gb, 16);
273
        } while (i & 0x8000);
274
    }
275

    
276
    align_get_bits(&ctx->gb);
277

    
278
    return 0;
279
}
280

    
281

    
282
/**
283
 *  Skips a header extension.
284
 *
285
 *  @param gb   [in,out] the GetBit context
286
 */
287
static inline void skip_hdr_extension(GetBitContext *gb)
288
{
289
    int i, len;
290

    
291
    do {
292
        len = get_bits(gb, 8);
293
        for (i = 0; i < len; i++) skip_bits(gb, 8);
294
    } while(len);
295
}
296

    
297

    
298
/**
299
 *  Decodes Indeo5 picture header.
300
 *
301
 *  @param ctx      [in,out] ptr to the decoder context
302
 *  @param avctx    [in] ptr to the AVCodecContext
303
 *  @return         result code: 0 = OK, -1 = error
304
 */
305
static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
306
{
307
    if (get_bits(&ctx->gb, 5) != 0x1F) {
308
        av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
309
        return -1;
310
    }
311

    
312
    ctx->prev_frame_type = ctx->frame_type;
313
    ctx->frame_type      = get_bits(&ctx->gb, 3);
314
    if (ctx->frame_type >= 5) {
315
        av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
316
        return -1;
317
    }
318

    
319
    ctx->frame_num = get_bits(&ctx->gb, 8);
320

    
321
    if (ctx->frame_type == FRAMETYPE_INTRA) {
322
        if (decode_gop_header(ctx, avctx))
323
            return -1;
324
    }
325

    
326
    if (ctx->frame_type != FRAMETYPE_NULL) {
327
        ctx->frame_flags = get_bits(&ctx->gb, 8);
328

    
329
        ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
330

    
331
        ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
332

    
333
        /* skip unknown extension if any */
334
        if (ctx->frame_flags & 0x20)
335
            skip_hdr_extension(&ctx->gb); /* XXX: untested */
336

    
337
        /* decode macroblock huffman codebook */
338
        if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
339
            return -1;
340

    
341
        skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
342
    }
343

    
344
    align_get_bits(&ctx->gb);
345

    
346
    return 0;
347
}
348

    
349

    
350
/**
351
 *  Decodes Indeo5 band header.
352
 *
353
 *  @param ctx      [in,out] ptr to the decoder context
354
 *  @param band     [in,out] ptr to the band descriptor
355
 *  @param avctx    [in] ptr to the AVCodecContext
356
 *  @return         result code: 0 = OK, -1 = error
357
 */
358
static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
359
                           AVCodecContext *avctx)
360
{
361
    int         i;
362
    uint8_t     band_flags;
363

    
364
    band_flags = get_bits(&ctx->gb, 8);
365

    
366
    if (band_flags & 1) {
367
        band->is_empty = 1;
368
        return 0;
369
    }
370

    
371
    band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
372

    
373
    band->inherit_mv     = band_flags & 2;
374
    band->inherit_qdelta = band_flags & 8;
375
    band->qdelta_present = band_flags & 4;
376
    if (!band->qdelta_present) band->inherit_qdelta = 1;
377

    
378
    /* decode rvmap probability corrections if any */
379
    band->num_corr = 0; /* there are no corrections */
380
    if (band_flags & 0x10) {
381
        band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
382
        if (band->num_corr > 61) {
383
            av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
384
                   band->num_corr);
385
            return -1;
386
        }
387

    
388
        /* read correction pairs */
389
        for (i = 0; i < band->num_corr * 2; i++)
390
            band->corr[i] = get_bits(&ctx->gb, 8);
391
    }
392

    
393
    /* select appropriate rvmap table for this band */
394
    band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
395

    
396
    /* decode block huffman codebook */
397
    if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
398
        return -1;
399

    
400
    band->checksum_present = get_bits1(&ctx->gb);
401
    if (band->checksum_present)
402
        band->checksum = get_bits(&ctx->gb, 16);
403

    
404
    band->glob_quant = get_bits(&ctx->gb, 5);
405

    
406
    /* skip unknown extension if any */
407
    if (band_flags & 0x20) { /* XXX: untested */
408
        align_get_bits(&ctx->gb);
409
        skip_hdr_extension(&ctx->gb);
410
    }
411

    
412
    align_get_bits(&ctx->gb);
413

    
414
    return 0;
415
}
416

    
417

    
418
/**
419
 *  Decodes info (block type, cbp, quant delta, motion vector)
420
 *  for all macroblocks in the current tile.
421
 *
422
 *  @param ctx      [in,out] ptr to the decoder context
423
 *  @param band     [in,out] ptr to the band descriptor
424
 *  @param tile     [in,out] ptr to the tile descriptor
425
 *  @param avctx    [in] ptr to the AVCodecContext
426
 *  @return         result code: 0 = OK, -1 = error
427
 */
428
static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
429
                          IVITile *tile, AVCodecContext *avctx)
430
{
431
    int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
432
                mv_scale, blks_per_mb;
433
    IVIMbInfo   *mb, *ref_mb;
434
    int         row_offset = band->mb_size * band->pitch;
435

    
436
    mb     = tile->mbs;
437
    ref_mb = tile->ref_mbs;
438
    offs   = tile->ypos * band->pitch + tile->xpos;
439

    
440
    /* scale factor for motion vectors */
441
    mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
442
    mv_x = mv_y = 0;
443

    
444
    for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
445
        mb_offset = offs;
446

    
447
        for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
448
            mb->xpos     = x;
449
            mb->ypos     = y;
450
            mb->buf_offs = mb_offset;
451

    
452
            if (get_bits1(&ctx->gb)) {
453
                if (ctx->frame_type == FRAMETYPE_INTRA) {
454
                    av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
455
                    return -1;
456
                }
457
                mb->type = 1; /* empty macroblocks are always INTER */
458
                mb->cbp  = 0; /* all blocks are empty */
459

    
460
                mb->q_delta = 0;
461
                if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
462
                    mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
463
                                           IVI_VLC_BITS, 1);
464
                    mb->q_delta = IVI_TOSIGNED(mb->q_delta);
465
                }
466

    
467
                mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
468
                if (band->inherit_mv){
469
                    /* motion vector inheritance */
470
                    if (mv_scale) {
471
                        mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
472
                        mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
473
                    } else {
474
                        mb->mv_x = ref_mb->mv_x;
475
                        mb->mv_y = ref_mb->mv_y;
476
                    }
477
                }
478
            } else {
479
                if (band->inherit_mv) {
480
                    mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
481
                } else if (ctx->frame_type == FRAMETYPE_INTRA) {
482
                    mb->type = 0; /* mb_type is always INTRA for intra-frames */
483
                } else {
484
                    mb->type = get_bits1(&ctx->gb);
485
                }
486

    
487
                blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
488
                mb->cbp = get_bits(&ctx->gb, blks_per_mb);
489

    
490
                mb->q_delta = 0;
491
                if (band->qdelta_present) {
492
                    if (band->inherit_qdelta) {
493
                        if (ref_mb) mb->q_delta = ref_mb->q_delta;
494
                    } else if (mb->cbp || (!band->plane && !band->band_num &&
495
                                           (ctx->frame_flags & 8))) {
496
                        mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
497
                                               IVI_VLC_BITS, 1);
498
                        mb->q_delta = IVI_TOSIGNED(mb->q_delta);
499
                    }
500
                }
501

    
502
                if (!mb->type) {
503
                    mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
504
                } else {
505
                    if (band->inherit_mv){
506
                        /* motion vector inheritance */
507
                        if (mv_scale) {
508
                            mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
509
                            mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
510
                        } else {
511
                            mb->mv_x = ref_mb->mv_x;
512
                            mb->mv_y = ref_mb->mv_y;
513
                        }
514
                    } else {
515
                        /* decode motion vector deltas */
516
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
517
                                            IVI_VLC_BITS, 1);
518
                        mv_y += IVI_TOSIGNED(mv_delta);
519
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
520
                                            IVI_VLC_BITS, 1);
521
                        mv_x += IVI_TOSIGNED(mv_delta);
522
                        mb->mv_x = mv_x;
523
                        mb->mv_y = mv_y;
524
                    }
525
                }
526
            }
527

    
528
            mb++;
529
            if (ref_mb)
530
                ref_mb++;
531
            mb_offset += band->mb_size;
532
        }
533

    
534
        offs += row_offset;
535
    }
536

    
537
    align_get_bits(&ctx->gb);
538

    
539
    return 0;
540
}
541

    
542

    
543
/**
544
 *  Decodes an Indeo5 band.
545
 *
546
 *  @param ctx      [in,out] ptr to the decoder context
547
 *  @param band     [in,out] ptr to the band descriptor
548
 *  @param avctx    [in] ptr to the AVCodecContext
549
 *  @return         result code: 0 = OK, -1 = error
550
 */
551
static int decode_band(IVI5DecContext *ctx, int plane_num,
552
                       IVIBandDesc *band, AVCodecContext *avctx)
553
{
554
    int         result, i, t, idx1, idx2, pos;
555
    IVITile     *tile;
556

    
557
    band->buf     = band->bufs[ctx->dst_buf];
558
    band->ref_buf = band->bufs[ctx->ref_buf];
559
    band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
560

    
561
    result = decode_band_hdr(ctx, band, avctx);
562
    if (result) {
563
        av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
564
               result);
565
        return -1;
566
    }
567

    
568
    if (band->is_empty) {
569
        av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
570
        return -1;
571
    }
572

    
573
    if (band->blk_size == 8) {
574
        band->intra_base  = &ivi5_base_quant_8x8_intra[band->quant_mat][0];
575
        band->inter_base  = &ivi5_base_quant_8x8_inter[band->quant_mat][0];
576
        band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0];
577
        band->inter_scale = &ivi5_scale_quant_8x8_inter[band->quant_mat][0];
578
    } else {
579
        band->intra_base  = ivi5_base_quant_4x4_intra;
580
        band->inter_base  = ivi5_base_quant_4x4_inter;
581
        band->intra_scale = ivi5_scale_quant_4x4_intra;
582
        band->inter_scale = ivi5_scale_quant_4x4_inter;
583
    }
584

    
585
    band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
586

    
587
    /* apply corrections to the selected rvmap table if present */
588
    for (i = 0; i < band->num_corr; i++) {
589
        idx1 = band->corr[i*2];
590
        idx2 = band->corr[i*2+1];
591
        FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
592
        FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
593
    }
594

    
595
    pos = get_bits_count(&ctx->gb);
596

    
597
    for (t = 0; t < band->num_tiles; t++) {
598
        tile = &band->tiles[t];
599

    
600
        tile->is_empty = get_bits1(&ctx->gb);
601
        if (tile->is_empty) {
602
            ff_ivi_process_empty_tile(avctx, band, tile,
603
                                      (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
604
        } else {
605
            tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
606

    
607
            result = decode_mb_info(ctx, band, tile, avctx);
608
            if (result < 0)
609
                break;
610

    
611
            result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
612
            if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
613
                av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
614
                break;
615
            }
616
            pos += tile->data_size << 3; // skip to next tile
617
        }
618
    }
619

    
620
    /* restore the selected rvmap table by applying its corrections in reverse order */
621
    for (i = band->num_corr-1; i >= 0; i--) {
622
        idx1 = band->corr[i*2];
623
        idx2 = band->corr[i*2+1];
624
        FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
625
        FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
626
    }
627

    
628
#if IVI_DEBUG
629
    if (band->checksum_present) {
630
        uint16_t chksum = ivi_calc_band_checksum(band);
631
        if (chksum != band->checksum) {
632
            av_log(avctx, AV_LOG_ERROR,
633
                   "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
634
                   band->plane, band->band_num, band->checksum, chksum);
635
        }
636
    }
637
#endif
638

    
639
    align_get_bits(&ctx->gb);
640

    
641
    return result;
642
}
643

    
644

    
645
/**
646
 *  Switches buffers.
647
 *
648
 *  @param ctx      [in,out] ptr to the decoder context
649
 *  @param avctx    [in] ptr to the AVCodecContext
650
 */
651
static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx)
652
{
653
    switch (ctx->prev_frame_type) {
654
    case FRAMETYPE_INTRA:
655
    case FRAMETYPE_INTER:
656
        ctx->buf_switch ^= 1;
657
        ctx->dst_buf = ctx->buf_switch;
658
        ctx->ref_buf = ctx->buf_switch ^ 1;
659
        break;
660
    case FRAMETYPE_INTER_SCAL:
661
        if (!ctx->inter_scal) {
662
            ctx->ref2_buf   = 2;
663
            ctx->inter_scal = 1;
664
        }
665
        FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
666
        ctx->ref_buf = ctx->ref2_buf;
667
        break;
668
    case FRAMETYPE_INTER_NOREF:
669
        break;
670
    }
671

    
672
    switch (ctx->frame_type) {
673
    case FRAMETYPE_INTRA:
674
        ctx->buf_switch = 0;
675
        /* FALLTHROUGH */
676
    case FRAMETYPE_INTER:
677
        ctx->inter_scal = 0;
678
        ctx->dst_buf = ctx->buf_switch;
679
        ctx->ref_buf = ctx->buf_switch ^ 1;
680
        break;
681
    case FRAMETYPE_INTER_SCAL:
682
    case FRAMETYPE_INTER_NOREF:
683
    case FRAMETYPE_NULL:
684
        break;
685
    }
686
}
687

    
688

    
689
/**
690
 *  Initializes Indeo5 decoder.
691
 */
692
static av_cold int decode_init(AVCodecContext *avctx)
693
{
694
    IVI5DecContext  *ctx = avctx->priv_data;
695
    int             result;
696

    
697
    ff_ivi_init_static_vlc();
698

    
699
    /* copy rvmap tables in our context so we can apply changes to them */
700
    memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
701

    
702
    /* set the initial picture layout according to the basic profile:
703
       there is only one band per plane (no scalability), only one tile (no local decoding)
704
       and picture format = YVU9 */
705
    ctx->pic_conf.pic_width     = avctx->width;
706
    ctx->pic_conf.pic_height    = avctx->height;
707
    ctx->pic_conf.chroma_width  = (avctx->width  + 3) >> 2;
708
    ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
709
    ctx->pic_conf.tile_width    = avctx->width;
710
    ctx->pic_conf.tile_height   = avctx->height;
711
    ctx->pic_conf.luma_bands    = ctx->pic_conf.chroma_bands = 1;
712

    
713
    result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
714
    if (result) {
715
        av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
716
        return -1;
717
    }
718

    
719
    ctx->buf_switch = 0;
720
    ctx->inter_scal = 0;
721

    
722
    avctx->pix_fmt = PIX_FMT_YUV410P;
723

    
724
    return 0;
725
}
726

    
727

    
728
/**
729
 *  main decoder function
730
 */
731
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
732
                        AVPacket *avpkt)
733
{
734
    IVI5DecContext  *ctx = avctx->priv_data;
735
    const uint8_t   *buf = avpkt->data;
736
    int             buf_size = avpkt->size;
737
    int             result, p, b;
738

    
739
    init_get_bits(&ctx->gb, buf, buf_size * 8);
740
    ctx->frame_data = buf;
741
    ctx->frame_size = buf_size;
742

    
743
    result = decode_pic_hdr(ctx, avctx);
744
    if (result) {
745
        av_log(avctx, AV_LOG_ERROR,
746
               "Error while decoding picture header: %d\n", result);
747
        return -1;
748
    }
749

    
750
    if (ctx->gop_flags & IVI5_IS_PROTECTED) {
751
        av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
752
        return -1;
753
    }
754

    
755
    switch_buffers(ctx, avctx);
756

    
757
    //START_TIMER;
758

    
759
    if (ctx->frame_type != FRAMETYPE_NULL) {
760
        for (p = 0; p < 3; p++) {
761
            for (b = 0; b < ctx->planes[p].num_bands; b++) {
762
                result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
763
                if (result) {
764
                    av_log(avctx, AV_LOG_ERROR,
765
                           "Error while decoding band: %d, plane: %d\n", b, p);
766
                    return -1;
767
                }
768
            }
769
        }
770
    }
771

    
772
    //STOP_TIMER("decode_planes");
773

    
774
    if (ctx->frame.data[0])
775
        avctx->release_buffer(avctx, &ctx->frame);
776

    
777
    ctx->frame.reference = 0;
778
    if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
779
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
780
        return -1;
781
    }
782

    
783
    if (ctx->is_scalable) {
784
        ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
785
    } else {
786
        ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
787
    }
788

    
789
    ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
790
    ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
791

    
792
    *data_size = sizeof(AVFrame);
793
    *(AVFrame*)data = ctx->frame;
794

    
795
    return buf_size;
796
}
797

    
798

    
799
/**
800
 *  Closes Indeo5 decoder and cleans up its context.
801
 */
802
static av_cold int decode_close(AVCodecContext *avctx)
803
{
804
    IVI5DecContext *ctx = avctx->priv_data;
805

    
806
    ff_ivi_free_buffers(&ctx->planes[0]);
807

    
808
    if (ctx->mb_vlc.cust_tab.table)
809
        free_vlc(&ctx->mb_vlc.cust_tab);
810

    
811
    if (ctx->frame.data[0])
812
        avctx->release_buffer(avctx, &ctx->frame);
813

    
814
    return 0;
815
}
816

    
817

    
818
AVCodec indeo5_decoder = {
819
    .name           = "indeo5",
820
    .type           = AVMEDIA_TYPE_VIDEO,
821
    .id             = CODEC_ID_INDEO5,
822
    .priv_data_size = sizeof(IVI5DecContext),
823
    .init           = decode_init,
824
    .close          = decode_close,
825
    .decode         = decode_frame,
826
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
827
};