GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/indeo5.c Lines: 245 353 69.4 %
Date: 2019-11-18 18:00:01 Branches: 120 214 56.1 %

Line Branch Exec Source
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.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/**
23
 * @file
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 BITSTREAM_READER_LE
31
#include "avcodec.h"
32
#include "get_bits.h"
33
#include "ivi.h"
34
#include "ivi_dsp.h"
35
#include "indeo5data.h"
36
37
/**
38
 *  Indeo5 frame types.
39
 */
40
enum {
41
    FRAMETYPE_INTRA       = 0,
42
    FRAMETYPE_INTER       = 1,  ///< non-droppable P-frame
43
    FRAMETYPE_INTER_SCAL  = 2,  ///< droppable P-frame used in the scalability mode
44
    FRAMETYPE_INTER_NOREF = 3,  ///< droppable P-frame
45
    FRAMETYPE_NULL        = 4   ///< empty frame with no data
46
};
47
48
#define IVI5_PIC_SIZE_ESC       15
49
50
/**
51
 *  Decode Indeo5 GOP (Group of pictures) header.
52
 *  This header is present in key frames only.
53
 *  It defines parameters for all frames in a GOP.
54
 *
55
 *  @param[in,out] ctx    ptr to the decoder context
56
 *  @param[in]     avctx  ptr to the AVCodecContext
57
 *  @return         result code: 0 = OK, -1 = error
58
 */
59
9
static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
60
{
61
    int             result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable;
62
9
    int             quant_mat, blk_size_changed = 0;
63
    IVIBandDesc     *band, *band1, *band2;
64
    IVIPicConfig    pic_conf;
65
66
9
    ctx->gop_flags = get_bits(&ctx->gb, 8);
67
68
9
    ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
69
70
9
    if (ctx->gop_flags & IVI5_IS_PROTECTED)
71
        ctx->lock_word = get_bits_long(&ctx->gb, 32);
72
73
9
    tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
74
9
    if (tile_size > 256) {
75
        av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
76
        return AVERROR_INVALIDDATA;
77
    }
78
79
    /* decode number of wavelet bands */
80
    /* num_levels * 3 + 1 */
81
9
    pic_conf.luma_bands   = get_bits(&ctx->gb, 2) * 3 + 1;
82
9
    pic_conf.chroma_bands = get_bits1(&ctx->gb)   * 3 + 1;
83

9
    is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
84

9
    if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
85
        av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
86
               pic_conf.luma_bands, pic_conf.chroma_bands);
87
        return AVERROR_INVALIDDATA;
88
    }
89
90
9
    pic_size_indx = get_bits(&ctx->gb, 4);
91
9
    if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
92
        pic_conf.pic_height = get_bits(&ctx->gb, 13);
93
        pic_conf.pic_width  = get_bits(&ctx->gb, 13);
94
    } else {
95
9
        pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
96
9
        pic_conf.pic_width  = ivi5_common_pic_sizes[pic_size_indx * 2    ] << 2;
97
    }
98
99
9
    if (ctx->gop_flags & 2) {
100
        avpriv_report_missing_feature(avctx, "YV12 picture format");
101
        return AVERROR_PATCHWELCOME;
102
    }
103
104
9
    pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
105
9
    pic_conf.chroma_width  = (pic_conf.pic_width  + 3) >> 2;
106
107
9
    if (!tile_size) {
108
9
        pic_conf.tile_height = pic_conf.pic_height;
109
9
        pic_conf.tile_width  = pic_conf.pic_width;
110
    } else {
111
        pic_conf.tile_height = pic_conf.tile_width = tile_size;
112
    }
113
114
    /* check if picture layout was changed and reallocate buffers */
115

9
    if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) {
116
1
        result = ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 0);
117
1
        if (result < 0) {
118
            av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
119
            return result;
120
        }
121
1
        ctx->pic_conf = pic_conf;
122
1
        ctx->is_scalable = is_scalable;
123
1
        blk_size_changed = 1; /* force reallocation of the internal structures */
124
    }
125
126
27
    for (p = 0; p <= 1; p++) {
127

36
        for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
128
18
            band = &ctx->planes[p].bands[i];
129
130
18
            band->is_halfpel = get_bits1(&ctx->gb);
131
132
18
            mb_size  = get_bits1(&ctx->gb);
133
18
            blk_size = 8 >> get_bits1(&ctx->gb);
134
18
            mb_size  = blk_size << !mb_size;
135
136

18
            if (p==0 && blk_size==4) {
137
                av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n");
138
                return AVERROR_PATCHWELCOME;
139
            }
140
141

18
            blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
142
18
            if (blk_size_changed) {
143
2
                band->mb_size  = mb_size;
144
2
                band->blk_size = blk_size;
145
            }
146
147
18
            if (get_bits1(&ctx->gb)) {
148
                avpriv_report_missing_feature(avctx, "Extended transform info");
149
                return AVERROR_PATCHWELCOME;
150
            }
151
152
            /* select transform function and scan pattern according to plane and band number */
153

18
            switch ((p << 2) + i) {
154
9
            case 0:
155
9
                band->inv_transform  = ff_ivi_inverse_slant_8x8;
156
9
                band->dc_transform   = ff_ivi_dc_slant_2d;
157
9
                band->scan           = ff_zigzag_direct;
158
9
                band->transform_size = 8;
159
9
                break;
160
161
            case 1:
162
                band->inv_transform  = ff_ivi_row_slant8;
163
                band->dc_transform   = ff_ivi_dc_row_slant;
164
                band->scan           = ff_ivi_vertical_scan_8x8;
165
                band->transform_size = 8;
166
                break;
167
168
            case 2:
169
                band->inv_transform  = ff_ivi_col_slant8;
170
                band->dc_transform   = ff_ivi_dc_col_slant;
171
                band->scan           = ff_ivi_horizontal_scan_8x8;
172
                band->transform_size = 8;
173
                break;
174
175
            case 3:
176
                band->inv_transform  = ff_ivi_put_pixels_8x8;
177
                band->dc_transform   = ff_ivi_put_dc_pixel_8x8;
178
                band->scan           = ff_ivi_horizontal_scan_8x8;
179
                band->transform_size = 8;
180
                break;
181
182
9
            case 4:
183
9
                band->inv_transform  = ff_ivi_inverse_slant_4x4;
184
9
                band->dc_transform   = ff_ivi_dc_slant_2d;
185
9
                band->scan           = ff_ivi_direct_scan_4x4;
186
9
                band->transform_size = 4;
187
9
                break;
188
            }
189
190
27
            band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
191
9
                                band->inv_transform == ff_ivi_inverse_slant_4x4;
192
193
18
            if (band->transform_size != band->blk_size) {
194
                av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size);
195
                return AVERROR_INVALIDDATA;
196
            }
197
198
            /* select dequant matrix according to plane and band number */
199
18
            if (!p) {
200
9
                quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
201
            } else {
202
9
                quant_mat = 5;
203
            }
204
205
18
            if (band->blk_size == 8) {
206
9
                if(quant_mat >= 5){
207
                    av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
208
                    return -1;
209
                }
210
9
                band->intra_base  = &ivi5_base_quant_8x8_intra[quant_mat][0];
211
9
                band->inter_base  = &ivi5_base_quant_8x8_inter[quant_mat][0];
212
9
                band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
213
9
                band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
214
            } else {
215
9
                band->intra_base  = ivi5_base_quant_4x4_intra;
216
9
                band->inter_base  = ivi5_base_quant_4x4_inter;
217
9
                band->intra_scale = ivi5_scale_quant_4x4_intra;
218
9
                band->inter_scale = ivi5_scale_quant_4x4_inter;
219
            }
220
221
18
            if (get_bits(&ctx->gb, 2)) {
222
                av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
223
                return AVERROR_INVALIDDATA;
224
            }
225
        }
226
    }
227
228
    /* copy chroma parameters into the 2nd chroma plane */
229
18
    for (i = 0; i < pic_conf.chroma_bands; i++) {
230
9
        band1 = &ctx->planes[1].bands[i];
231
9
        band2 = &ctx->planes[2].bands[i];
232
233
9
        band2->width         = band1->width;
234
9
        band2->height        = band1->height;
235
9
        band2->mb_size       = band1->mb_size;
236
9
        band2->blk_size      = band1->blk_size;
237
9
        band2->is_halfpel    = band1->is_halfpel;
238
9
        band2->intra_base    = band1->intra_base;
239
9
        band2->inter_base    = band1->inter_base;
240
9
        band2->intra_scale   = band1->intra_scale;
241
9
        band2->inter_scale   = band1->inter_scale;
242
9
        band2->scan          = band1->scan;
243
9
        band2->inv_transform = band1->inv_transform;
244
9
        band2->dc_transform  = band1->dc_transform;
245
9
        band2->is_2d_trans   = band1->is_2d_trans;
246
9
        band2->transform_size= band1->transform_size;
247
    }
248
249
    /* reallocate internal structures if needed */
250
9
    if (blk_size_changed) {
251
1
        result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
252
1
                                   pic_conf.tile_height);
253
1
        if (result < 0) {
254
            av_log(avctx, AV_LOG_ERROR,
255
                   "Couldn't reallocate internal structures!\n");
256
            return result;
257
        }
258
    }
259
260
9
    if (ctx->gop_flags & 8) {
261
        if (get_bits(&ctx->gb, 3)) {
262
            av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
263
            return AVERROR_INVALIDDATA;
264
        }
265
266
        if (get_bits1(&ctx->gb))
267
            skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
268
    }
269
270
9
    align_get_bits(&ctx->gb);
271
272
9
    skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
273
274
    /* skip GOP extension if any */
275
9
    if (get_bits1(&ctx->gb)) {
276
        do {
277
            i = get_bits(&ctx->gb, 16);
278
        } while (i & 0x8000);
279
    }
280
281
9
    align_get_bits(&ctx->gb);
282
283
9
    return 0;
284
}
285
286
287
/**
288
 *  Skip a header extension.
289
 *
290
 *  @param[in,out]  gb  the GetBit context
291
 */
292
static inline int skip_hdr_extension(GetBitContext *gb)
293
{
294
    int i, len;
295
296
    do {
297
        len = get_bits(gb, 8);
298
        if (8*len > get_bits_left(gb))
299
            return AVERROR_INVALIDDATA;
300
        for (i = 0; i < len; i++) skip_bits(gb, 8);
301
    } while(len);
302
303
    return 0;
304
}
305
306
307
/**
308
 *  Decode Indeo5 picture header.
309
 *
310
 *  @param[in,out]  ctx    ptr to the decoder context
311
 *  @param[in]      avctx  ptr to the AVCodecContext
312
 *  @return         result code: 0 = OK, -1 = error
313
 */
314
134
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
315
{
316
    int ret;
317
318
134
    if (get_bits(&ctx->gb, 5) != 0x1F) {
319
        av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
320
        return AVERROR_INVALIDDATA;
321
    }
322
323
134
    ctx->prev_frame_type = ctx->frame_type;
324
134
    ctx->frame_type      = get_bits(&ctx->gb, 3);
325
134
    if (ctx->frame_type >= 5) {
326
        av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
327
        ctx->frame_type = FRAMETYPE_INTRA;
328
        return AVERROR_INVALIDDATA;
329
    }
330
331
134
    ctx->frame_num = get_bits(&ctx->gb, 8);
332
333
134
    if (ctx->frame_type == FRAMETYPE_INTRA) {
334
9
        if ((ret = decode_gop_header(ctx, avctx)) < 0) {
335
            av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
336
            ctx->gop_invalid = 1;
337
            return ret;
338
        }
339
9
        ctx->gop_invalid = 0;
340
    }
341
342

134
    if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) {
343
        av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n");
344
        ctx->frame_type = FRAMETYPE_INTER;
345
        return AVERROR_INVALIDDATA;
346
    }
347
348
134
    if (ctx->frame_type != FRAMETYPE_NULL) {
349
133
        ctx->frame_flags = get_bits(&ctx->gb, 8);
350
351
133
        ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
352
353
133
        ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
354
355
        /* skip unknown extension if any */
356
133
        if (ctx->frame_flags & 0x20)
357
            skip_hdr_extension(&ctx->gb); /* XXX: untested */
358
359
        /* decode macroblock huffman codebook */
360
133
        ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
361
                                   IVI_MB_HUFF, &ctx->mb_vlc, avctx);
362
133
        if (ret < 0)
363
            return ret;
364
365
133
        skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
366
    }
367
368
134
    align_get_bits(&ctx->gb);
369
370
134
    return 0;
371
}
372
373
374
/**
375
 *  Decode Indeo5 band header.
376
 *
377
 *  @param[in,out]  ctx    ptr to the decoder context
378
 *  @param[in,out]  band   ptr to the band descriptor
379
 *  @param[in]      avctx  ptr to the AVCodecContext
380
 *  @return         result code: 0 = OK, -1 = error
381
 */
382
399
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
383
                           AVCodecContext *avctx)
384
{
385
    int         i, ret;
386
    uint8_t     band_flags;
387
388
399
    band_flags = get_bits(&ctx->gb, 8);
389
390
399
    if (band_flags & 1) {
391
        band->is_empty = 1;
392
        return 0;
393
    }
394
395
399
    band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
396
397
399
    band->inherit_mv     = band_flags & 2;
398
399
    band->inherit_qdelta = band_flags & 8;
399
399
    band->qdelta_present = band_flags & 4;
400
399
    if (!band->qdelta_present) band->inherit_qdelta = 1;
401
402
    /* decode rvmap probability corrections if any */
403
399
    band->num_corr = 0; /* there are no corrections */
404
399
    if (band_flags & 0x10) {
405
252
        band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
406
252
        if (band->num_corr > 61) {
407
            av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
408
                   band->num_corr);
409
            return AVERROR_INVALIDDATA;
410
        }
411
412
        /* read correction pairs */
413
2316
        for (i = 0; i < band->num_corr * 2; i++)
414
2064
            band->corr[i] = get_bits(&ctx->gb, 8);
415
    }
416
417
    /* select appropriate rvmap table for this band */
418
399
    band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
419
420
    /* decode block huffman codebook */
421
399
    ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
422
                               &band->blk_vlc, avctx);
423
399
    if (ret < 0)
424
        return ret;
425
426
399
    band->checksum_present = get_bits1(&ctx->gb);
427
399
    if (band->checksum_present)
428
399
        band->checksum = get_bits(&ctx->gb, 16);
429
430
399
    band->glob_quant = get_bits(&ctx->gb, 5);
431
432
    /* skip unknown extension if any */
433
399
    if (band_flags & 0x20) { /* XXX: untested */
434
        align_get_bits(&ctx->gb);
435
        skip_hdr_extension(&ctx->gb);
436
    }
437
438
399
    align_get_bits(&ctx->gb);
439
440
399
    return 0;
441
}
442
443
444
/**
445
 *  Decode info (block type, cbp, quant delta, motion vector)
446
 *  for all macroblocks in the current tile.
447
 *
448
 *  @param[in,out]  ctx    ptr to the decoder context
449
 *  @param[in,out]  band   ptr to the band descriptor
450
 *  @param[in,out]  tile   ptr to the tile descriptor
451
 *  @param[in]      avctx  ptr to the AVCodecContext
452
 *  @return         result code: 0 = OK, -1 = error
453
 */
454
399
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
455
                          IVITile *tile, AVCodecContext *avctx)
456
{
457
    int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
458
                mv_scale, blks_per_mb, s;
459
    IVIMbInfo   *mb, *ref_mb;
460
399
    int         row_offset = band->mb_size * band->pitch;
461
462
399
    mb     = tile->mbs;
463
399
    ref_mb = tile->ref_mbs;
464
399
    offs   = tile->ypos * band->pitch + tile->xpos;
465
466
399
    if (!ref_mb &&
467

133
        ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
468
        return AVERROR_INVALIDDATA;
469
470
399
    if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
471
        av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
472
               tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
473
        return AVERROR_INVALIDDATA;
474
    }
475
476
    /* scale factor for motion vectors */
477
399
    mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
478
399
    mv_x = mv_y = 0;
479
480
5187
    for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
481
4788
        mb_offset = offs;
482
483
76608
        for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
484
71820
            mb->xpos     = x;
485
71820
            mb->ypos     = y;
486
71820
            mb->buf_offs = mb_offset;
487
488
71820
            if (get_bits1(&ctx->gb)) {
489
27025
                if (ctx->frame_type == FRAMETYPE_INTRA) {
490
                    av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
491
                    return AVERROR_INVALIDDATA;
492
                }
493
27025
                mb->type = 1; /* empty macroblocks are always INTER */
494
27025
                mb->cbp  = 0; /* all blocks are empty */
495
496
27025
                mb->q_delta = 0;
497

27025
                if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
498
                    mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
499
                                           IVI_VLC_BITS, 1);
500
                    mb->q_delta = IVI_TOSIGNED(mb->q_delta);
501
                }
502
503
27025
                mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
504

27025
                if (band->inherit_mv && ref_mb){
505
                    /* motion vector inheritance */
506
19295
                    if (mv_scale) {
507
19295
                        mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
508
19295
                        mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
509
                    } else {
510
                        mb->mv_x = ref_mb->mv_x;
511
                        mb->mv_y = ref_mb->mv_y;
512
                    }
513
                }
514
            } else {
515

44795
                if (band->inherit_mv && ref_mb) {
516
28585
                    mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
517
16210
                } else if (ctx->frame_type == FRAMETYPE_INTRA) {
518
1620
                    mb->type = 0; /* mb_type is always INTRA for intra-frames */
519
                } else {
520
14590
                    mb->type = get_bits1(&ctx->gb);
521
                }
522
523
44795
                blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
524
44795
                mb->cbp = get_bits(&ctx->gb, blks_per_mb);
525
526
44795
                mb->q_delta = 0;
527
44795
                if (band->qdelta_present) {
528
                    if (band->inherit_qdelta) {
529
                        if (ref_mb) mb->q_delta = ref_mb->q_delta;
530
                    } else if (mb->cbp || (!band->plane && !band->band_num &&
531
                                           (ctx->frame_flags & 8))) {
532
                        mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
533
                                               IVI_VLC_BITS, 1);
534
                        mb->q_delta = IVI_TOSIGNED(mb->q_delta);
535
                    }
536
                }
537
538
44795
                if (!mb->type) {
539
13239
                    mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
540
                } else {
541

31556
                    if (band->inherit_mv && ref_mb){
542
                        /* motion vector inheritance */
543
19759
                        if (mv_scale) {
544
19759
                            mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
545
19759
                            mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
546
                        } else {
547
                            mb->mv_x = ref_mb->mv_x;
548
                            mb->mv_y = ref_mb->mv_y;
549
                        }
550
                    } else {
551
                        /* decode motion vector deltas */
552
11797
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
553
                                            IVI_VLC_BITS, 1);
554
11797
                        mv_y += IVI_TOSIGNED(mv_delta);
555
11797
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
556
                                            IVI_VLC_BITS, 1);
557
11797
                        mv_x += IVI_TOSIGNED(mv_delta);
558
11797
                        mb->mv_x = mv_x;
559
11797
                        mb->mv_y = mv_y;
560
                    }
561
                }
562
            }
563
564
71820
            s= band->is_halfpel;
565
71820
            if (mb->type)
566
58581
            if ( x +  (mb->mv_x   >>s) +                 (y+               (mb->mv_y   >>s))*band->pitch < 0 ||
567
58581
                 x + ((mb->mv_x+s)>>s) + band->mb_size - 1
568
58581
                   + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) {
569
                av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
570
                return AVERROR_INVALIDDATA;
571
            }
572
573
71820
            mb++;
574
71820
            if (ref_mb)
575
47880
                ref_mb++;
576
71820
            mb_offset += band->mb_size;
577
        }
578
579
4788
        offs += row_offset;
580
    }
581
582
399
    align_get_bits(&ctx->gb);
583
584
399
    return 0;
585
}
586
587
588
/**
589
 *  Switch buffers.
590
 *
591
 *  @param[in,out] ctx  ptr to the decoder context
592
 */
593
134
static void switch_buffers(IVI45DecContext *ctx)
594
{
595

134
    switch (ctx->prev_frame_type) {
596
133
    case FRAMETYPE_INTRA:
597
    case FRAMETYPE_INTER:
598
133
        ctx->buf_switch ^= 1;
599
133
        ctx->dst_buf = ctx->buf_switch;
600
133
        ctx->ref_buf = ctx->buf_switch ^ 1;
601
133
        break;
602
    case FRAMETYPE_INTER_SCAL:
603
        if (!ctx->inter_scal) {
604
            ctx->ref2_buf   = 2;
605
            ctx->inter_scal = 1;
606
        }
607
        FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
608
        ctx->ref_buf = ctx->ref2_buf;
609
        break;
610
    case FRAMETYPE_INTER_NOREF:
611
        break;
612
    }
613
614

134
    switch (ctx->frame_type) {
615
9
    case FRAMETYPE_INTRA:
616
9
        ctx->buf_switch = 0;
617
        /* FALLTHROUGH */
618
133
    case FRAMETYPE_INTER:
619
133
        ctx->inter_scal = 0;
620
133
        ctx->dst_buf = ctx->buf_switch;
621
133
        ctx->ref_buf = ctx->buf_switch ^ 1;
622
133
        break;
623
1
    case FRAMETYPE_INTER_SCAL:
624
    case FRAMETYPE_INTER_NOREF:
625
    case FRAMETYPE_NULL:
626
1
        break;
627
    }
628
134
}
629
630
631
268
static int is_nonnull_frame(IVI45DecContext *ctx)
632
{
633
268
    return ctx->frame_type != FRAMETYPE_NULL;
634
}
635
636
637
/**
638
 *  Initialize Indeo5 decoder.
639
 */
640
2
static av_cold int decode_init(AVCodecContext *avctx)
641
{
642
2
    IVI45DecContext  *ctx = avctx->priv_data;
643
    int             result;
644
645
2
    ctx->gop_invalid = 1;
646
647
2
    ff_ivi_init_static_vlc();
648
649
    /* copy rvmap tables in our context so we can apply changes to them */
650
2
    memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
651
652
    /* set the initial picture layout according to the basic profile:
653
       there is only one band per plane (no scalability), only one tile (no local decoding)
654
       and picture format = YVU9 */
655
2
    ctx->pic_conf.pic_width     = avctx->width;
656
2
    ctx->pic_conf.pic_height    = avctx->height;
657
2
    ctx->pic_conf.chroma_width  = (avctx->width  + 3) >> 2;
658
2
    ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
659
2
    ctx->pic_conf.tile_width    = avctx->width;
660
2
    ctx->pic_conf.tile_height   = avctx->height;
661
2
    ctx->pic_conf.luma_bands    = ctx->pic_conf.chroma_bands = 1;
662
663
2
    result = ff_ivi_init_planes(avctx, ctx->planes, &ctx->pic_conf, 0);
664
2
    if (result) {
665
        av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
666
        return AVERROR_INVALIDDATA;
667
    }
668
669
2
    ctx->buf_switch = 0;
670
2
    ctx->inter_scal = 0;
671
672
2
    ctx->decode_pic_hdr   = decode_pic_hdr;
673
2
    ctx->decode_band_hdr  = decode_band_hdr;
674
2
    ctx->decode_mb_info   = decode_mb_info;
675
2
    ctx->switch_buffers   = switch_buffers;
676
2
    ctx->is_nonnull_frame = is_nonnull_frame;
677
678
2
    ctx->is_indeo4 = 0;
679
680
2
    avctx->pix_fmt = AV_PIX_FMT_YUV410P;
681
682
2
    return 0;
683
}
684
685
AVCodec ff_indeo5_decoder = {
686
    .name           = "indeo5",
687
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
688
    .type           = AVMEDIA_TYPE_VIDEO,
689
    .id             = AV_CODEC_ID_INDEO5,
690
    .priv_data_size = sizeof(IVI45DecContext),
691
    .init           = decode_init,
692
    .close          = ff_ivi_decode_close,
693
    .decode         = ff_ivi_decode_frame,
694
    .capabilities   = AV_CODEC_CAP_DR1,
695
};