GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/indeo5.c Lines: 245 353 69.4 %
Date: 2020-09-25 23:16:12 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 "internal.h"
34
#include "ivi.h"
35
#include "ivi_dsp.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
/**
52
 *  Decode Indeo5 GOP (Group of pictures) header.
53
 *  This header is present in key frames only.
54
 *  It defines parameters for all frames in a GOP.
55
 *
56
 *  @param[in,out] ctx    ptr to the decoder context
57
 *  @param[in]     avctx  ptr to the AVCodecContext
58
 *  @return         result code: 0 = OK, -1 = error
59
 */
60
9
static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
61
{
62
    int             result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable;
63
9
    int             quant_mat, blk_size_changed = 0;
64
    IVIBandDesc     *band, *band1, *band2;
65
    IVIPicConfig    pic_conf;
66
67
9
    ctx->gop_flags = get_bits(&ctx->gb, 8);
68
69
9
    ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
70
71
9
    if (ctx->gop_flags & IVI5_IS_PROTECTED)
72
        ctx->lock_word = get_bits_long(&ctx->gb, 32);
73
74
9
    tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
75
9
    if (tile_size > 256) {
76
        av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
77
        return AVERROR_INVALIDDATA;
78
    }
79
80
    /* decode number of wavelet bands */
81
    /* num_levels * 3 + 1 */
82
9
    pic_conf.luma_bands   = get_bits(&ctx->gb, 2) * 3 + 1;
83
9
    pic_conf.chroma_bands = get_bits1(&ctx->gb)   * 3 + 1;
84

9
    is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
85

9
    if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
86
        av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
87
               pic_conf.luma_bands, pic_conf.chroma_bands);
88
        return AVERROR_INVALIDDATA;
89
    }
90
91
9
    pic_size_indx = get_bits(&ctx->gb, 4);
92
9
    if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
93
        pic_conf.pic_height = get_bits(&ctx->gb, 13);
94
        pic_conf.pic_width  = get_bits(&ctx->gb, 13);
95
    } else {
96
9
        pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
97
9
        pic_conf.pic_width  = ivi5_common_pic_sizes[pic_size_indx * 2    ] << 2;
98
    }
99
100
9
    if (ctx->gop_flags & 2) {
101
        avpriv_report_missing_feature(avctx, "YV12 picture format");
102
        return AVERROR_PATCHWELCOME;
103
    }
104
105
9
    pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
106
9
    pic_conf.chroma_width  = (pic_conf.pic_width  + 3) >> 2;
107
108
9
    if (!tile_size) {
109
9
        pic_conf.tile_height = pic_conf.pic_height;
110
9
        pic_conf.tile_width  = pic_conf.pic_width;
111
    } else {
112
        pic_conf.tile_height = pic_conf.tile_width = tile_size;
113
    }
114
115
    /* check if picture layout was changed and reallocate buffers */
116

9
    if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) {
117
1
        result = ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 0);
118
1
        if (result < 0) {
119
            av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
120
            return result;
121
        }
122
1
        ctx->pic_conf = pic_conf;
123
1
        ctx->is_scalable = is_scalable;
124
1
        blk_size_changed = 1; /* force reallocation of the internal structures */
125
    }
126
127
27
    for (p = 0; p <= 1; p++) {
128

36
        for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
129
18
            band = &ctx->planes[p].bands[i];
130
131
18
            band->is_halfpel = get_bits1(&ctx->gb);
132
133
18
            mb_size  = get_bits1(&ctx->gb);
134
18
            blk_size = 8 >> get_bits1(&ctx->gb);
135
18
            mb_size  = blk_size << !mb_size;
136
137

18
            if (p==0 && blk_size==4) {
138
                av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n");
139
                return AVERROR_PATCHWELCOME;
140
            }
141
142

18
            blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
143
18
            if (blk_size_changed) {
144
2
                band->mb_size  = mb_size;
145
2
                band->blk_size = blk_size;
146
            }
147
148
18
            if (get_bits1(&ctx->gb)) {
149
                avpriv_report_missing_feature(avctx, "Extended transform info");
150
                return AVERROR_PATCHWELCOME;
151
            }
152
153
            /* select transform function and scan pattern according to plane and band number */
154

18
            switch ((p << 2) + i) {
155
9
            case 0:
156
9
                band->inv_transform  = ff_ivi_inverse_slant_8x8;
157
9
                band->dc_transform   = ff_ivi_dc_slant_2d;
158
9
                band->scan           = ff_zigzag_direct;
159
9
                band->transform_size = 8;
160
9
                break;
161
162
            case 1:
163
                band->inv_transform  = ff_ivi_row_slant8;
164
                band->dc_transform   = ff_ivi_dc_row_slant;
165
                band->scan           = ff_ivi_vertical_scan_8x8;
166
                band->transform_size = 8;
167
                break;
168
169
            case 2:
170
                band->inv_transform  = ff_ivi_col_slant8;
171
                band->dc_transform   = ff_ivi_dc_col_slant;
172
                band->scan           = ff_ivi_horizontal_scan_8x8;
173
                band->transform_size = 8;
174
                break;
175
176
            case 3:
177
                band->inv_transform  = ff_ivi_put_pixels_8x8;
178
                band->dc_transform   = ff_ivi_put_dc_pixel_8x8;
179
                band->scan           = ff_ivi_horizontal_scan_8x8;
180
                band->transform_size = 8;
181
                break;
182
183
9
            case 4:
184
9
                band->inv_transform  = ff_ivi_inverse_slant_4x4;
185
9
                band->dc_transform   = ff_ivi_dc_slant_2d;
186
9
                band->scan           = ff_ivi_direct_scan_4x4;
187
9
                band->transform_size = 4;
188
9
                break;
189
            }
190
191
27
            band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
192
9
                                band->inv_transform == ff_ivi_inverse_slant_4x4;
193
194
18
            if (band->transform_size != band->blk_size) {
195
                av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size);
196
                return AVERROR_INVALIDDATA;
197
            }
198
199
            /* select dequant matrix according to plane and band number */
200
18
            if (!p) {
201
9
                quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
202
            } else {
203
9
                quant_mat = 5;
204
            }
205
206
18
            if (band->blk_size == 8) {
207
9
                if(quant_mat >= 5){
208
                    av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
209
                    return -1;
210
                }
211
9
                band->intra_base  = &ivi5_base_quant_8x8_intra[quant_mat][0];
212
9
                band->inter_base  = &ivi5_base_quant_8x8_inter[quant_mat][0];
213
9
                band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
214
9
                band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
215
            } else {
216
9
                band->intra_base  = ivi5_base_quant_4x4_intra;
217
9
                band->inter_base  = ivi5_base_quant_4x4_inter;
218
9
                band->intra_scale = ivi5_scale_quant_4x4_intra;
219
9
                band->inter_scale = ivi5_scale_quant_4x4_inter;
220
            }
221
222
18
            if (get_bits(&ctx->gb, 2)) {
223
                av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
224
                return AVERROR_INVALIDDATA;
225
            }
226
        }
227
    }
228
229
    /* copy chroma parameters into the 2nd chroma plane */
230
18
    for (i = 0; i < pic_conf.chroma_bands; i++) {
231
9
        band1 = &ctx->planes[1].bands[i];
232
9
        band2 = &ctx->planes[2].bands[i];
233
234
9
        band2->width         = band1->width;
235
9
        band2->height        = band1->height;
236
9
        band2->mb_size       = band1->mb_size;
237
9
        band2->blk_size      = band1->blk_size;
238
9
        band2->is_halfpel    = band1->is_halfpel;
239
9
        band2->intra_base    = band1->intra_base;
240
9
        band2->inter_base    = band1->inter_base;
241
9
        band2->intra_scale   = band1->intra_scale;
242
9
        band2->inter_scale   = band1->inter_scale;
243
9
        band2->scan          = band1->scan;
244
9
        band2->inv_transform = band1->inv_transform;
245
9
        band2->dc_transform  = band1->dc_transform;
246
9
        band2->is_2d_trans   = band1->is_2d_trans;
247
9
        band2->transform_size= band1->transform_size;
248
    }
249
250
    /* reallocate internal structures if needed */
251
9
    if (blk_size_changed) {
252
1
        result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
253
1
                                   pic_conf.tile_height);
254
1
        if (result < 0) {
255
            av_log(avctx, AV_LOG_ERROR,
256
                   "Couldn't reallocate internal structures!\n");
257
            return result;
258
        }
259
    }
260
261
9
    if (ctx->gop_flags & 8) {
262
        if (get_bits(&ctx->gb, 3)) {
263
            av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
264
            return AVERROR_INVALIDDATA;
265
        }
266
267
        if (get_bits1(&ctx->gb))
268
            skip_bits(&ctx->gb, 24); /* skip transparency fill color */
269
    }
270
271
9
    align_get_bits(&ctx->gb);
272
273
9
    skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
274
275
    /* skip GOP extension if any */
276
9
    if (get_bits1(&ctx->gb)) {
277
        do {
278
            i = get_bits(&ctx->gb, 16);
279
        } while (i & 0x8000);
280
    }
281
282
9
    align_get_bits(&ctx->gb);
283
284
9
    return 0;
285
}
286
287
288
/**
289
 *  Skip a header extension.
290
 *
291
 *  @param[in,out]  gb  the GetBit context
292
 */
293
static inline int skip_hdr_extension(GetBitContext *gb)
294
{
295
    int i, len;
296
297
    do {
298
        len = get_bits(gb, 8);
299
        if (8*len > get_bits_left(gb))
300
            return AVERROR_INVALIDDATA;
301
        for (i = 0; i < len; i++) skip_bits(gb, 8);
302
    } while(len);
303
304
    return 0;
305
}
306
307
308
/**
309
 *  Decode Indeo5 picture header.
310
 *
311
 *  @param[in,out]  ctx    ptr to the decoder context
312
 *  @param[in]      avctx  ptr to the AVCodecContext
313
 *  @return         result code: 0 = OK, -1 = error
314
 */
315
134
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
316
{
317
    int ret;
318
319
134
    if (get_bits(&ctx->gb, 5) != 0x1F) {
320
        av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
321
        return AVERROR_INVALIDDATA;
322
    }
323
324
134
    ctx->prev_frame_type = ctx->frame_type;
325
134
    ctx->frame_type      = get_bits(&ctx->gb, 3);
326
134
    if (ctx->frame_type >= 5) {
327
        av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
328
        ctx->frame_type = FRAMETYPE_INTRA;
329
        return AVERROR_INVALIDDATA;
330
    }
331
332
134
    ctx->frame_num = get_bits(&ctx->gb, 8);
333
334
134
    if (ctx->frame_type == FRAMETYPE_INTRA) {
335
9
        if ((ret = decode_gop_header(ctx, avctx)) < 0) {
336
            av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
337
            ctx->gop_invalid = 1;
338
            return ret;
339
        }
340
9
        ctx->gop_invalid = 0;
341
    }
342
343

134
    if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) {
344
        av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n");
345
        ctx->frame_type = FRAMETYPE_INTER;
346
        return AVERROR_INVALIDDATA;
347
    }
348
349
134
    if (ctx->frame_type != FRAMETYPE_NULL) {
350
133
        ctx->frame_flags = get_bits(&ctx->gb, 8);
351
352
133
        ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits(&ctx->gb, 24) : 0;
353
354
133
        ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
355
356
        /* skip unknown extension if any */
357
133
        if (ctx->frame_flags & 0x20)
358
            skip_hdr_extension(&ctx->gb); /* XXX: untested */
359
360
        /* decode macroblock huffman codebook */
361
133
        ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
362
                                   IVI_MB_HUFF, &ctx->mb_vlc, avctx);
363
133
        if (ret < 0)
364
            return ret;
365
366
133
        skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
367
    }
368
369
134
    align_get_bits(&ctx->gb);
370
371
134
    return 0;
372
}
373
374
375
/**
376
 *  Decode Indeo5 band header.
377
 *
378
 *  @param[in,out]  ctx    ptr to the decoder context
379
 *  @param[in,out]  band   ptr to the band descriptor
380
 *  @param[in]      avctx  ptr to the AVCodecContext
381
 *  @return         result code: 0 = OK, -1 = error
382
 */
383
399
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
384
                           AVCodecContext *avctx)
385
{
386
    int         i, ret;
387
    uint8_t     band_flags;
388
389
399
    band_flags = get_bits(&ctx->gb, 8);
390
391
399
    if (band_flags & 1) {
392
        band->is_empty = 1;
393
        return 0;
394
    }
395
396
399
    band->data_size = (ctx->frame_flags & 0x80) ? get_bits(&ctx->gb, 24) : 0;
397
398
399
    band->inherit_mv     = band_flags & 2;
399
399
    band->inherit_qdelta = band_flags & 8;
400
399
    band->qdelta_present = band_flags & 4;
401
399
    if (!band->qdelta_present) band->inherit_qdelta = 1;
402
403
    /* decode rvmap probability corrections if any */
404
399
    band->num_corr = 0; /* there are no corrections */
405
399
    if (band_flags & 0x10) {
406
252
        band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
407
252
        if (band->num_corr > 61) {
408
            av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
409
                   band->num_corr);
410
            return AVERROR_INVALIDDATA;
411
        }
412
413
        /* read correction pairs */
414
2316
        for (i = 0; i < band->num_corr * 2; i++)
415
2064
            band->corr[i] = get_bits(&ctx->gb, 8);
416
    }
417
418
    /* select appropriate rvmap table for this band */
419
399
    band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
420
421
    /* decode block huffman codebook */
422
399
    ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
423
                               &band->blk_vlc, avctx);
424
399
    if (ret < 0)
425
        return ret;
426
427
399
    band->checksum_present = get_bits1(&ctx->gb);
428
399
    if (band->checksum_present)
429
399
        band->checksum = get_bits(&ctx->gb, 16);
430
431
399
    band->glob_quant = get_bits(&ctx->gb, 5);
432
433
    /* skip unknown extension if any */
434
399
    if (band_flags & 0x20) { /* XXX: untested */
435
        align_get_bits(&ctx->gb);
436
        skip_hdr_extension(&ctx->gb);
437
    }
438
439
399
    align_get_bits(&ctx->gb);
440
441
399
    return 0;
442
}
443
444
445
/**
446
 *  Decode info (block type, cbp, quant delta, motion vector)
447
 *  for all macroblocks in the current tile.
448
 *
449
 *  @param[in,out]  ctx    ptr to the decoder context
450
 *  @param[in,out]  band   ptr to the band descriptor
451
 *  @param[in,out]  tile   ptr to the tile descriptor
452
 *  @param[in]      avctx  ptr to the AVCodecContext
453
 *  @return         result code: 0 = OK, -1 = error
454
 */
455
399
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
456
                          IVITile *tile, AVCodecContext *avctx)
457
{
458
    int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
459
                mv_scale, blks_per_mb, s;
460
    IVIMbInfo   *mb, *ref_mb;
461
399
    int         row_offset = band->mb_size * band->pitch;
462
463
399
    mb     = tile->mbs;
464
399
    ref_mb = tile->ref_mbs;
465
399
    offs   = tile->ypos * band->pitch + tile->xpos;
466
467
399
    if (!ref_mb &&
468

133
        ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
469
        return AVERROR_INVALIDDATA;
470
471
399
    if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
472
        av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
473
               tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
474
        return AVERROR_INVALIDDATA;
475
    }
476
477
    /* scale factor for motion vectors */
478
399
    mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
479
399
    mv_x = mv_y = 0;
480
481
5187
    for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
482
4788
        mb_offset = offs;
483
484
76608
        for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
485
71820
            mb->xpos     = x;
486
71820
            mb->ypos     = y;
487
71820
            mb->buf_offs = mb_offset;
488
489
71820
            if (get_bits1(&ctx->gb)) {
490
27025
                if (ctx->frame_type == FRAMETYPE_INTRA) {
491
                    av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
492
                    return AVERROR_INVALIDDATA;
493
                }
494
27025
                mb->type = 1; /* empty macroblocks are always INTER */
495
27025
                mb->cbp  = 0; /* all blocks are empty */
496
497
27025
                mb->q_delta = 0;
498

27025
                if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
499
                    mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
500
                                           IVI_VLC_BITS, 1);
501
                    mb->q_delta = IVI_TOSIGNED(mb->q_delta);
502
                }
503
504
27025
                mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
505

27025
                if (band->inherit_mv && ref_mb){
506
                    /* motion vector inheritance */
507
19295
                    if (mv_scale) {
508
19295
                        mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
509
19295
                        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
                }
515
            } else {
516

44795
                if (band->inherit_mv && ref_mb) {
517
28585
                    mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
518
16210
                } else if (ctx->frame_type == FRAMETYPE_INTRA) {
519
1620
                    mb->type = 0; /* mb_type is always INTRA for intra-frames */
520
                } else {
521
14590
                    mb->type = get_bits1(&ctx->gb);
522
                }
523
524
44795
                blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
525
44795
                mb->cbp = get_bits(&ctx->gb, blks_per_mb);
526
527
44795
                mb->q_delta = 0;
528
44795
                if (band->qdelta_present) {
529
                    if (band->inherit_qdelta) {
530
                        if (ref_mb) mb->q_delta = ref_mb->q_delta;
531
                    } else if (mb->cbp || (!band->plane && !band->band_num &&
532
                                           (ctx->frame_flags & 8))) {
533
                        mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
534
                                               IVI_VLC_BITS, 1);
535
                        mb->q_delta = IVI_TOSIGNED(mb->q_delta);
536
                    }
537
                }
538
539
44795
                if (!mb->type) {
540
13239
                    mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
541
                } else {
542

31556
                    if (band->inherit_mv && ref_mb){
543
                        /* motion vector inheritance */
544
19759
                        if (mv_scale) {
545
19759
                            mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
546
19759
                            mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
547
                        } else {
548
                            mb->mv_x = ref_mb->mv_x;
549
                            mb->mv_y = ref_mb->mv_y;
550
                        }
551
                    } else {
552
                        /* decode motion vector deltas */
553
11797
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
554
                                            IVI_VLC_BITS, 1);
555
11797
                        mv_y += IVI_TOSIGNED(mv_delta);
556
11797
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
557
                                            IVI_VLC_BITS, 1);
558
11797
                        mv_x += IVI_TOSIGNED(mv_delta);
559
11797
                        mb->mv_x = mv_x;
560
11797
                        mb->mv_y = mv_y;
561
                    }
562
                }
563
            }
564
565
71820
            s= band->is_halfpel;
566
71820
            if (mb->type)
567
58581
            if ( x +  (mb->mv_x   >>s) +                 (y+               (mb->mv_y   >>s))*band->pitch < 0 ||
568
58581
                 x + ((mb->mv_x+s)>>s) + band->mb_size - 1
569
58581
                   + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) {
570
                av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
571
                return AVERROR_INVALIDDATA;
572
            }
573
574
71820
            mb++;
575
71820
            if (ref_mb)
576
47880
                ref_mb++;
577
71820
            mb_offset += band->mb_size;
578
        }
579
580
4788
        offs += row_offset;
581
    }
582
583
399
    align_get_bits(&ctx->gb);
584
585
399
    return 0;
586
}
587
588
589
/**
590
 *  Switch buffers.
591
 *
592
 *  @param[in,out] ctx  ptr to the decoder context
593
 */
594
134
static void switch_buffers(IVI45DecContext *ctx)
595
{
596

134
    switch (ctx->prev_frame_type) {
597
133
    case FRAMETYPE_INTRA:
598
    case FRAMETYPE_INTER:
599
133
        ctx->buf_switch ^= 1;
600
133
        ctx->dst_buf = ctx->buf_switch;
601
133
        ctx->ref_buf = ctx->buf_switch ^ 1;
602
133
        break;
603
    case FRAMETYPE_INTER_SCAL:
604
        if (!ctx->inter_scal) {
605
            ctx->ref2_buf   = 2;
606
            ctx->inter_scal = 1;
607
        }
608
        FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
609
        ctx->ref_buf = ctx->ref2_buf;
610
        break;
611
    case FRAMETYPE_INTER_NOREF:
612
        break;
613
    }
614
615

134
    switch (ctx->frame_type) {
616
9
    case FRAMETYPE_INTRA:
617
9
        ctx->buf_switch = 0;
618
        /* FALLTHROUGH */
619
133
    case FRAMETYPE_INTER:
620
133
        ctx->inter_scal = 0;
621
133
        ctx->dst_buf = ctx->buf_switch;
622
133
        ctx->ref_buf = ctx->buf_switch ^ 1;
623
133
        break;
624
1
    case FRAMETYPE_INTER_SCAL:
625
    case FRAMETYPE_INTER_NOREF:
626
    case FRAMETYPE_NULL:
627
1
        break;
628
    }
629
134
}
630
631
632
268
static int is_nonnull_frame(IVI45DecContext *ctx)
633
{
634
268
    return ctx->frame_type != FRAMETYPE_NULL;
635
}
636
637
638
/**
639
 *  Initialize Indeo5 decoder.
640
 */
641
2
static av_cold int decode_init(AVCodecContext *avctx)
642
{
643
2
    IVI45DecContext  *ctx = avctx->priv_data;
644
    int             result;
645
646
2
    ctx->gop_invalid = 1;
647
648
2
    ff_ivi_init_static_vlc();
649
650
    /* copy rvmap tables in our context so we can apply changes to them */
651
2
    memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
652
653
    /* set the initial picture layout according to the basic profile:
654
       there is only one band per plane (no scalability), only one tile (no local decoding)
655
       and picture format = YVU9 */
656
2
    ctx->pic_conf.pic_width     = avctx->width;
657
2
    ctx->pic_conf.pic_height    = avctx->height;
658
2
    ctx->pic_conf.chroma_width  = (avctx->width  + 3) >> 2;
659
2
    ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
660
2
    ctx->pic_conf.tile_width    = avctx->width;
661
2
    ctx->pic_conf.tile_height   = avctx->height;
662
2
    ctx->pic_conf.luma_bands    = ctx->pic_conf.chroma_bands = 1;
663
664
2
    result = ff_ivi_init_planes(avctx, ctx->planes, &ctx->pic_conf, 0);
665
2
    if (result) {
666
        av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
667
        return AVERROR_INVALIDDATA;
668
    }
669
670
2
    ctx->buf_switch = 0;
671
2
    ctx->inter_scal = 0;
672
673
2
    ctx->decode_pic_hdr   = decode_pic_hdr;
674
2
    ctx->decode_band_hdr  = decode_band_hdr;
675
2
    ctx->decode_mb_info   = decode_mb_info;
676
2
    ctx->switch_buffers   = switch_buffers;
677
2
    ctx->is_nonnull_frame = is_nonnull_frame;
678
679
2
    ctx->is_indeo4 = 0;
680
681
2
    avctx->pix_fmt = AV_PIX_FMT_YUV410P;
682
683
2
    return 0;
684
}
685
686
AVCodec ff_indeo5_decoder = {
687
    .name           = "indeo5",
688
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
689
    .type           = AVMEDIA_TYPE_VIDEO,
690
    .id             = AV_CODEC_ID_INDEO5,
691
    .priv_data_size = sizeof(IVI45DecContext),
692
    .init           = decode_init,
693
    .close          = ff_ivi_decode_close,
694
    .decode         = ff_ivi_decode_frame,
695
    .capabilities   = AV_CODEC_CAP_DR1,
696
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
697
};