GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/indeo4.c Lines: 244 351 69.5 %
Date: 2019-11-22 03:34:36 Branches: 154 247 62.3 %

Line Branch Exec Source
1
/*
2
 * Indeo Video Interactive v4 compatible decoder
3
 * Copyright (c) 2009-2011 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 4 decoder
25
 *
26
 * Indeo 4 data is usually transported within .avi or .mov files.
27
 * Known FOURCCs: 'IV41'
28
 */
29
30
#define BITSTREAM_READER_LE
31
#include "avcodec.h"
32
#include "get_bits.h"
33
#include "libavutil/imgutils.h"
34
#include "indeo4data.h"
35
#include "internal.h"
36
#include "ivi.h"
37
#include "ivi_dsp.h"
38
39
#define IVI4_PIC_SIZE_ESC   7
40
41
42
static const struct {
43
    InvTransformPtr *inv_trans;
44
    DCTransformPtr  *dc_trans;
45
    int             is_2d_trans;
46
} transforms[18] = {
47
    { ff_ivi_inverse_haar_8x8,  ff_ivi_dc_haar_2d,       1 },
48
    { ff_ivi_row_haar8,         ff_ivi_dc_haar_2d,       0 },
49
    { ff_ivi_col_haar8,         ff_ivi_dc_haar_2d,       0 },
50
    { ff_ivi_put_pixels_8x8,    ff_ivi_put_dc_pixel_8x8, 1 },
51
    { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d,      1 },
52
    { ff_ivi_row_slant8,        ff_ivi_dc_row_slant,     1 },
53
    { ff_ivi_col_slant8,        ff_ivi_dc_col_slant,     1 },
54
    { NULL, NULL, 0 }, /* inverse DCT 8x8 */
55
    { NULL, NULL, 0 }, /* inverse DCT 8x1 */
56
    { NULL, NULL, 0 }, /* inverse DCT 1x8 */
57
    { ff_ivi_inverse_haar_4x4,  ff_ivi_dc_haar_2d,       1 },
58
    { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d,      1 },
59
    { NULL, NULL, 0 }, /* no transform 4x4 */
60
    { ff_ivi_row_haar4,         ff_ivi_dc_haar_2d,       0 },
61
    { ff_ivi_col_haar4,         ff_ivi_dc_haar_2d,       0 },
62
    { ff_ivi_row_slant4,        ff_ivi_dc_row_slant,     0 },
63
    { ff_ivi_col_slant4,        ff_ivi_dc_col_slant,     0 },
64
    { NULL, NULL, 0 }, /* inverse DCT 4x4 */
65
};
66
67
/**
68
 *  Decode subdivision of a plane.
69
 *  This is a simplified version that checks for two supported subdivisions:
70
 *  - 1 wavelet band  per plane, size factor 1:1, code pattern: 3
71
 *  - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3
72
 *  Anything else is either unsupported or corrupt.
73
 *
74
 *  @param[in,out] gb    the GetBit context
75
 *  @return        number of wavelet bands or 0 on error
76
 */
77
202
static int decode_plane_subdivision(GetBitContext *gb)
78
{
79
    int i;
80
81
202
    switch (get_bits(gb, 2)) {
82
202
    case 3:
83
202
        return 1;
84
    case 2:
85
        for (i = 0; i < 4; i++)
86
            if (get_bits(gb, 2) != 3)
87
                return 0;
88
        return 4;
89
    default:
90
        return 0;
91
    }
92
}
93
94
static inline int scale_tile_size(int def_size, int size_factor)
95
{
96
    return size_factor == 15 ? def_size : (size_factor + 1) << 5;
97
}
98
99
/**
100
 *  Decode Indeo 4 picture header.
101
 *
102
 *  @param[in,out] ctx       pointer to the decoder context
103
 *  @param[in]     avctx     pointer to the AVCodecContext
104
 *  @return        result code: 0 = OK, negative number = error
105
 */
106
101
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
107
{
108
    int             pic_size_indx, i, p;
109
    IVIPicConfig    pic_conf;
110
111
101
    if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
112
        av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
113
        return AVERROR_INVALIDDATA;
114
    }
115
116
101
    ctx->prev_frame_type = ctx->frame_type;
117
101
    ctx->frame_type      = get_bits(&ctx->gb, 3);
118
101
    if (ctx->frame_type == 7) {
119
        av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
120
        return AVERROR_INVALIDDATA;
121
    }
122
123
101
    if (ctx->frame_type == IVI4_FRAMETYPE_BIDIR)
124
        ctx->has_b_frames = 1;
125
126
101
    ctx->has_transp = get_bits1(&ctx->gb);
127
128
    /* unknown bit: Mac decoder ignores this bit, XANIM returns error */
129
101
    if (get_bits1(&ctx->gb)) {
130
        av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
131
        return AVERROR_INVALIDDATA;
132
    }
133
134
101
    ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
135
136
    /* null frames don't contain anything else so we just return */
137
101
    if (ctx->frame_type >= IVI4_FRAMETYPE_NULL_FIRST) {
138
        ff_dlog(avctx, "Null frame encountered!\n");
139
        return 0;
140
    }
141
142
    /* Check key lock status. If enabled - ignore lock word.         */
143
    /* Usually we have to prompt the user for the password, but      */
144
    /* we don't do that because Indeo 4 videos can be decoded anyway */
145
101
    if (get_bits1(&ctx->gb)) {
146
        skip_bits_long(&ctx->gb, 32);
147
        ff_dlog(avctx, "Password-protected clip!\n");
148
    }
149
150
101
    pic_size_indx = get_bits(&ctx->gb, 3);
151
101
    if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
152
        pic_conf.pic_height = get_bits(&ctx->gb, 16);
153
        pic_conf.pic_width  = get_bits(&ctx->gb, 16);
154
    } else {
155
101
        pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
156
101
        pic_conf.pic_width  = ivi4_common_pic_sizes[pic_size_indx * 2    ];
157
    }
158
159
    /* Decode tile dimensions. */
160
101
    ctx->uses_tiling = get_bits1(&ctx->gb);
161
101
    if (ctx->uses_tiling) {
162
        pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
163
        pic_conf.tile_width  = scale_tile_size(pic_conf.pic_width,  get_bits(&ctx->gb, 4));
164
    } else {
165
101
        pic_conf.tile_height = pic_conf.pic_height;
166
101
        pic_conf.tile_width  = pic_conf.pic_width;
167
    }
168
169
    /* Decode chroma subsampling. We support only 4:4 aka YVU9. */
170
101
    if (get_bits(&ctx->gb, 2)) {
171
        av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
172
        return AVERROR_INVALIDDATA;
173
    }
174
101
    pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
175
101
    pic_conf.chroma_width  = (pic_conf.pic_width  + 3) >> 2;
176
177
    /* decode subdivision of the planes */
178
101
    pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
179
101
    pic_conf.chroma_bands = 0;
180
101
    if (pic_conf.luma_bands)
181
101
        pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
182
183
101
    if (av_image_check_size2(pic_conf.pic_width, pic_conf.pic_height, avctx->max_pixels, AV_PIX_FMT_YUV410P, 0, avctx) < 0) {
184
        av_log(avctx, AV_LOG_ERROR, "picture dimensions %d %d cannot be decoded\n",
185
               pic_conf.pic_width, pic_conf.pic_height);
186
        return AVERROR_INVALIDDATA;
187
    }
188
189

101
    ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
190

101
    if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
191
        av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
192
               pic_conf.luma_bands, pic_conf.chroma_bands);
193
        return AVERROR_INVALIDDATA;
194
    }
195
196
    /* check if picture layout was changed and reallocate buffers */
197
101
    if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
198
1
        if (ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 1)) {
199
            av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
200
            ctx->pic_conf.luma_bands = 0;
201
            return AVERROR(ENOMEM);
202
        }
203
204
1
        ctx->pic_conf = pic_conf;
205
206
        /* set default macroblock/block dimensions */
207
4
        for (p = 0; p <= 2; p++) {
208

6
            for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
209

3
                ctx->planes[p].bands[i].mb_size  = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
210
3
                ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
211
            }
212
        }
213
214
1
        if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width,
215
1
                              ctx->pic_conf.tile_height)) {
216
            av_log(avctx, AV_LOG_ERROR,
217
                   "Couldn't reallocate internal structures!\n");
218
            return AVERROR(ENOMEM);
219
        }
220
    }
221
222
101
    ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
223
224
    /* skip decTimeEst field if present */
225
101
    if (get_bits1(&ctx->gb))
226
        skip_bits(&ctx->gb, 8);
227
228
    /* decode macroblock and block huffman codebooks */
229

202
    if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF,  &ctx->mb_vlc,  avctx) ||
230
101
        ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
231
        return AVERROR_INVALIDDATA;
232
233
101
    ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
234
235
101
    ctx->in_imf = get_bits1(&ctx->gb);
236
101
    ctx->in_q   = get_bits1(&ctx->gb);
237
238
101
    ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
239
240
    /* TODO: ignore this parameter if unused */
241
101
    ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
242
243
101
    ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
244
245
    /* skip picture header extension if any */
246
202
    while (get_bits1(&ctx->gb)) {
247
        ff_dlog(avctx, "Pic hdr extension encountered!\n");
248
101
        if (get_bits_left(&ctx->gb) < 10)
249
            return AVERROR_INVALIDDATA;
250
101
        skip_bits(&ctx->gb, 8);
251
    }
252
253
101
    if (get_bits1(&ctx->gb)) {
254
        av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
255
    }
256
257
101
    align_get_bits(&ctx->gb);
258
259
101
    return 0;
260
}
261
262
263
/**
264
 *  Decode Indeo 4 band header.
265
 *
266
 *  @param[in,out] ctx       pointer to the decoder context
267
 *  @param[in,out] band      pointer to the band descriptor
268
 *  @param[in]     avctx     pointer to the AVCodecContext
269
 *  @return        result code: 0 = OK, negative number = error
270
 */
271
301
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *arg_band,
272
                           AVCodecContext *avctx)
273
{
274
    int plane, band_num, indx, transform_id, scan_indx;
275
    int i;
276
    int quant_mat;
277
301
    IVIBandDesc temp_band, *band = &temp_band;
278
301
    memcpy(&temp_band, arg_band, sizeof(temp_band));
279
280
301
    plane    = get_bits(&ctx->gb, 2);
281
301
    band_num = get_bits(&ctx->gb, 4);
282

301
    if (band->plane != plane || band->band_num != band_num) {
283
        av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
284
        return AVERROR_INVALIDDATA;
285
    }
286
287
301
    band->is_empty = get_bits1(&ctx->gb);
288
301
    if (!band->is_empty) {
289
301
        int old_blk_size = band->blk_size;
290
        /* skip header size
291
         * If header size is not given, header size is 4 bytes. */
292
301
        if (get_bits1(&ctx->gb))
293
301
            skip_bits(&ctx->gb, 16);
294
295
301
        band->is_halfpel = get_bits(&ctx->gb, 2);
296
301
        if (band->is_halfpel >= 2) {
297
            av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n",
298
                   band->is_halfpel);
299
            return AVERROR_INVALIDDATA;
300
        }
301
301
        if (!band->is_halfpel)
302
            ctx->uses_fullpel = 1;
303
304
301
        band->checksum_present = get_bits1(&ctx->gb);
305
301
        if (band->checksum_present)
306
301
            band->checksum = get_bits(&ctx->gb, 16);
307
308
301
        indx = get_bits(&ctx->gb, 2);
309
301
        if (indx == 3) {
310
            av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n");
311
            return AVERROR_INVALIDDATA;
312
        }
313
301
        band->mb_size  = 16 >> indx;
314
301
        band->blk_size = 8 >> (indx >> 1);
315
316
301
        band->inherit_mv     = get_bits1(&ctx->gb);
317
301
        band->inherit_qdelta = get_bits1(&ctx->gb);
318
319
301
        band->glob_quant = get_bits(&ctx->gb, 5);
320
321

301
        if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
322
21
            transform_id = get_bits(&ctx->gb, 5);
323
21
            if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
324
21
                !transforms[transform_id].inv_trans) {
325
                avpriv_request_sample(avctx, "Transform %d", transform_id);
326
                return AVERROR_PATCHWELCOME;
327
            }
328

21
            if ((transform_id >= 7 && transform_id <= 9) ||
329
                 transform_id == 17) {
330
                avpriv_request_sample(avctx, "DCT transform");
331
                return AVERROR_PATCHWELCOME;
332
            }
333
334

21
            if (transform_id < 10 && band->blk_size < 8) {
335
                av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n");
336
                return AVERROR_INVALIDDATA;
337
            }
338

21
            if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10)
339
                ctx->uses_haar = 1;
340
341
21
            band->inv_transform = transforms[transform_id].inv_trans;
342
21
            band->dc_transform  = transforms[transform_id].dc_trans;
343
21
            band->is_2d_trans   = transforms[transform_id].is_2d_trans;
344
345
21
            if (transform_id < 10)
346
7
                band->transform_size = 8;
347
            else
348
14
                band->transform_size = 4;
349
350
21
            if (band->blk_size != band->transform_size) {
351
                av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size);
352
                return AVERROR_INVALIDDATA;
353
            }
354
355
21
            scan_indx = get_bits(&ctx->gb, 4);
356
21
            if (scan_indx == 15) {
357
                av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
358
                return AVERROR_INVALIDDATA;
359
            }
360

21
            if (scan_indx > 4 && scan_indx < 10) {
361
14
                if (band->blk_size != 4) {
362
                    av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
363
                    return AVERROR_INVALIDDATA;
364
                }
365
7
            } else if (band->blk_size != 8) {
366
                av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
367
                return AVERROR_INVALIDDATA;
368
            }
369
370
21
            band->scan = scan_index_to_tab[scan_indx];
371
21
            band->scan_size = band->blk_size;
372
373
21
            quant_mat = get_bits(&ctx->gb, 5);
374
21
            if (quant_mat == 31) {
375
                av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
376
                return AVERROR_INVALIDDATA;
377
            }
378
21
            if (quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) {
379
                avpriv_request_sample(avctx, "Quantization matrix %d",
380
                                      quant_mat);
381
                return AVERROR_INVALIDDATA;
382
            }
383
21
            band->quant_mat = quant_mat;
384
        } else {
385
280
            if (old_blk_size != band->blk_size) {
386
                av_log(avctx, AV_LOG_ERROR,
387
                       "The band block size does not match the configuration "
388
                       "inherited\n");
389
                return AVERROR_INVALIDDATA;
390
            }
391
        }
392

301
        if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) {
393
            av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n");
394
            band->quant_mat = 0;
395
            return AVERROR_INVALIDDATA;
396
        }
397
301
        if (band->scan_size != band->blk_size) {
398
            av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
399
            return AVERROR_INVALIDDATA;
400
        }
401

301
        if (band->transform_size == 8 && band->blk_size < 8) {
402
            av_log(avctx, AV_LOG_ERROR, "mismatching transform_size!\n");
403
            return AVERROR_INVALIDDATA;
404
        }
405
406
        /* decode block huffman codebook */
407
301
        if (!get_bits1(&ctx->gb))
408
            arg_band->blk_vlc.tab = ctx->blk_vlc.tab;
409
        else
410
301
            if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF,
411
                                     &arg_band->blk_vlc, avctx))
412
                return AVERROR_INVALIDDATA;
413
414
        /* select appropriate rvmap table for this band */
415
301
        band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
416
417
        /* decode rvmap probability corrections if any */
418
301
        band->num_corr = 0; /* there is no corrections */
419
301
        if (get_bits1(&ctx->gb)) {
420
253
            band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
421
253
            if (band->num_corr > 61) {
422
                av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
423
                       band->num_corr);
424
                return AVERROR_INVALIDDATA;
425
            }
426
427
            /* read correction pairs */
428
4087
            for (i = 0; i < band->num_corr * 2; i++)
429
3834
                band->corr[i] = get_bits(&ctx->gb, 8);
430
        }
431
    }
432
433
301
    if (band->blk_size == 8) {
434
101
        band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0];
435
101
        band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0];
436
    } else {
437
200
        band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0];
438
200
        band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0];
439
    }
440
441
    /* Indeo 4 doesn't use scale tables */
442
301
    band->intra_scale = NULL;
443
301
    band->inter_scale = NULL;
444
445
301
    align_get_bits(&ctx->gb);
446
447
301
    if (!band->scan) {
448
        av_log(avctx, AV_LOG_ERROR, "band->scan not set\n");
449
        return AVERROR_INVALIDDATA;
450
    }
451
452
301
    band->blk_vlc = arg_band->blk_vlc;
453
301
    memcpy(arg_band, band, sizeof(*arg_band));
454
455
301
    return 0;
456
}
457
458
459
/**
460
 *  Decode information (block type, cbp, quant delta, motion vector)
461
 *  for all macroblocks in the current tile.
462
 *
463
 *  @param[in,out] ctx       pointer to the decoder context
464
 *  @param[in,out] band      pointer to the band descriptor
465
 *  @param[in,out] tile      pointer to the tile descriptor
466
 *  @param[in]     avctx     pointer to the AVCodecContext
467
 *  @return        result code: 0 = OK, negative number = error
468
 */
469
301
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
470
                          IVITile *tile, AVCodecContext *avctx)
471
{
472
    int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
473
                mv_scale, mb_type_bits, s;
474
    IVIMbInfo   *mb, *ref_mb;
475
301
    int         row_offset = band->mb_size * band->pitch;
476
477
301
    mb     = tile->mbs;
478
301
    ref_mb = tile->ref_mbs;
479
301
    offs   = tile->ypos * band->pitch + tile->xpos;
480
481
301
    blks_per_mb  = band->mb_size   != band->blk_size  ? 4 : 1;
482
301
    mb_type_bits = ctx->frame_type == IVI4_FRAMETYPE_BIDIR ? 2 : 1;
483
484
    /* scale factor for motion vectors */
485
301
    mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
486
301
    mv_x = mv_y = 0;
487
488
301
    if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) {
489
        av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs);
490
        return -1;
491
    }
492
493
4816
    for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
494
4515
        mb_offset = offs;
495
496
94815
        for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) {
497
90300
            mb->xpos     = x;
498
90300
            mb->ypos     = y;
499
90300
            mb->buf_offs = mb_offset;
500
90300
            mb->b_mv_x   =
501
90300
            mb->b_mv_y   = 0;
502
503
90300
            if (get_bits_left(&ctx->gb) < 1) {
504
                av_log(avctx, AV_LOG_ERROR, "Insufficient input for mb info\n");
505
                return AVERROR_INVALIDDATA;
506
            }
507
508
90300
            if (get_bits1(&ctx->gb)) {
509
2014
                if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
510
                    av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
511
                    return AVERROR_INVALIDDATA;
512
                }
513
2014
                mb->type = 1; /* empty macroblocks are always INTER */
514
2014
                mb->cbp  = 0; /* all blocks are empty */
515
516
2014
                mb->q_delta = 0;
517

2014
                if (!band->plane && !band->band_num && ctx->in_q) {
518
56
                    mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
519
                                           IVI_VLC_BITS, 1);
520
56
                    mb->q_delta = IVI_TOSIGNED(mb->q_delta);
521
                }
522
523
2014
                mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
524

2014
                if (band->inherit_mv && ref_mb) {
525
                    /* motion vector inheritance */
526
1958
                    if (mv_scale) {
527
1958
                        mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
528
1958
                        mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
529
                    } else {
530
                        mb->mv_x = ref_mb->mv_x;
531
                        mb->mv_y = ref_mb->mv_y;
532
                    }
533
                }
534
            } else {
535
88286
                if (band->inherit_mv) {
536
                    /* copy mb_type from corresponding reference mb */
537
58042
                    if (!ref_mb) {
538
                        av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n");
539
                        return AVERROR_INVALIDDATA;
540
                    }
541
58042
                    mb->type = ref_mb->type;
542
30244
                } else if (ctx->frame_type == IVI4_FRAMETYPE_INTRA ||
543
28144
                           ctx->frame_type == IVI4_FRAMETYPE_INTRA1) {
544
2100
                    mb->type = 0; /* mb_type is always INTRA for intra-frames */
545
                } else {
546
28144
                    mb->type = get_bits(&ctx->gb, mb_type_bits);
547
                }
548
549
88286
                mb->cbp = get_bits(&ctx->gb, blks_per_mb);
550
551
88286
                mb->q_delta = 0;
552
88286
                if (band->inherit_qdelta) {
553
58042
                    if (ref_mb) mb->q_delta = ref_mb->q_delta;
554

30244
                } else if (mb->cbp || (!band->plane && !band->band_num &&
555
967
                           ctx->in_q)) {
556
30244
                    mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
557
                                           IVI_VLC_BITS, 1);
558
30244
                    mb->q_delta = IVI_TOSIGNED(mb->q_delta);
559
                }
560
561
88286
                if (!mb->type) {
562
77874
                    mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
563
                } else {
564
10412
                    if (band->inherit_mv) {
565
6274
                        if (ref_mb)
566
                            /* motion vector inheritance */
567
6274
                            if (mv_scale) {
568
6274
                                mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
569
6274
                                mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
570
                            } else {
571
                                mb->mv_x = ref_mb->mv_x;
572
                                mb->mv_y = ref_mb->mv_y;
573
                            }
574
                    } else {
575
                        /* decode motion vector deltas */
576
4138
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
577
                                            IVI_VLC_BITS, 1);
578
4138
                        mv_y += IVI_TOSIGNED(mv_delta);
579
4138
                        mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
580
                                            IVI_VLC_BITS, 1);
581
4138
                        mv_x += IVI_TOSIGNED(mv_delta);
582
4138
                        mb->mv_x = mv_x;
583
4138
                        mb->mv_y = mv_y;
584
4138
                        if (mb->type == 3) {
585
                            mv_delta = get_vlc2(&ctx->gb,
586
                                                ctx->mb_vlc.tab->table,
587
                                                IVI_VLC_BITS, 1);
588
                            mv_y += IVI_TOSIGNED(mv_delta);
589
                            mv_delta = get_vlc2(&ctx->gb,
590
                                                ctx->mb_vlc.tab->table,
591
                                                IVI_VLC_BITS, 1);
592
                            mv_x += IVI_TOSIGNED(mv_delta);
593
                            mb->b_mv_x = -mv_x;
594
                            mb->b_mv_y = -mv_y;
595
                        }
596
                    }
597
10412
                    if (mb->type == 2) {
598
                        mb->b_mv_x = -mb->mv_x;
599
                        mb->b_mv_y = -mb->mv_y;
600
                        mb->mv_x = 0;
601
                        mb->mv_y = 0;
602
                    }
603
                }
604
            }
605
606
90300
            s= band->is_halfpel;
607
90300
            if (mb->type)
608
12426
            if ( x +  (mb->mv_x   >>s) +                 (y+               (mb->mv_y   >>s))*band->pitch < 0 ||
609
12426
                 x + ((mb->mv_x+s)>>s) + band->mb_size - 1
610
12426
                   + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) {
611
                av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
612
                return AVERROR_INVALIDDATA;
613
            }
614
615
90300
            mb++;
616
90300
            if (ref_mb)
617
60000
                ref_mb++;
618
90300
            mb_offset += band->mb_size;
619
        }
620
621
4515
        offs += row_offset;
622
    }
623
624
301
    align_get_bits(&ctx->gb);
625
626
301
    return 0;
627
}
628
629
630
/**
631
 *  Rearrange decoding and reference buffers.
632
 *
633
 *  @param[in,out] ctx       pointer to the decoder context
634
 */
635
101
static void switch_buffers(IVI45DecContext *ctx)
636
{
637
101
    int is_prev_ref = 0, is_ref = 0;
638
639
101
    switch (ctx->prev_frame_type) {
640
54
    case IVI4_FRAMETYPE_INTRA:
641
    case IVI4_FRAMETYPE_INTRA1:
642
    case IVI4_FRAMETYPE_INTER:
643
54
        is_prev_ref = 1;
644
54
        break;
645
    }
646
647
101
    switch (ctx->frame_type) {
648
54
    case IVI4_FRAMETYPE_INTRA:
649
    case IVI4_FRAMETYPE_INTRA1:
650
    case IVI4_FRAMETYPE_INTER:
651
54
        is_ref = 1;
652
54
        break;
653
    }
654
655

101
    if (is_prev_ref && is_ref) {
656
7
        FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
657
94
    } else if (is_prev_ref) {
658
47
        FFSWAP(int, ctx->ref_buf, ctx->b_ref_buf);
659
47
        FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
660
    }
661
101
}
662
663
664
201
static int is_nonnull_frame(IVI45DecContext *ctx)
665
{
666
201
    return ctx->frame_type < IVI4_FRAMETYPE_NULL_FIRST;
667
}
668
669
670
2
static av_cold int decode_init(AVCodecContext *avctx)
671
{
672
2
    IVI45DecContext *ctx = avctx->priv_data;
673
674
2
    ff_ivi_init_static_vlc();
675
676
    /* copy rvmap tables in our context so we can apply changes to them */
677
2
    memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
678
679
    /* Force allocation of the internal buffers */
680
    /* during picture header decoding.          */
681
2
    ctx->pic_conf.pic_width  = 0;
682
2
    ctx->pic_conf.pic_height = 0;
683
684
2
    avctx->pix_fmt = AV_PIX_FMT_YUV410P;
685
686
2
    ctx->decode_pic_hdr   = decode_pic_hdr;
687
2
    ctx->decode_band_hdr  = decode_band_hdr;
688
2
    ctx->decode_mb_info   = decode_mb_info;
689
2
    ctx->switch_buffers   = switch_buffers;
690
2
    ctx->is_nonnull_frame = is_nonnull_frame;
691
692
2
    ctx->is_indeo4 = 1;
693
2
    ctx->show_indeo4_info = 1;
694
695
2
    ctx->dst_buf   = 0;
696
2
    ctx->ref_buf   = 1;
697
2
    ctx->b_ref_buf = 3; /* buffer 2 is used for scalability mode */
698
2
    ctx->p_frame = av_frame_alloc();
699
2
    if (!ctx->p_frame)
700
        return AVERROR(ENOMEM);
701
702
2
    return 0;
703
}
704
705
706
AVCodec ff_indeo4_decoder = {
707
    .name           = "indeo4",
708
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
709
    .type           = AVMEDIA_TYPE_VIDEO,
710
    .id             = AV_CODEC_ID_INDEO4,
711
    .priv_data_size = sizeof(IVI45DecContext),
712
    .init           = decode_init,
713
    .close          = ff_ivi_decode_close,
714
    .decode         = ff_ivi_decode_frame,
715
    .capabilities   = AV_CODEC_CAP_DR1,
716
};