FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/indeo5.c
Date: 2026-01-23 19:11:46
Exec Total Coverage
Lines: 245 353 69.4%
Functions: 7 8 87.5%
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 "codec_internal.h"
33 #include "get_bits.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
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 9 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
70
71
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 9 if (ctx->gop_flags & IVI5_IS_PROTECTED)
72 ✗ ctx->lock_word = get_bits_long(&ctx->gb, 32);
73
74
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 9 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
75
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 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
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 9 is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
85
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 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
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 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
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 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
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 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
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 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
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 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
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 27 for (p = 0; p <= 1; p++) {
128
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 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
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 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
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 18 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
143
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 18 if (blk_size_changed) {
144 2 band->mb_size = mb_size;
145 2 band->blk_size = blk_size;
146 }
147
148
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 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
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 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
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 27 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
192
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 9 band->inv_transform == ff_ivi_inverse_slant_4x4;
193
194
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 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
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 18 if (!p) {
201
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 9 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
202 } else {
203 9 quant_mat = 5;
204 }
205
206
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 18 if (band->blk_size == 8) {
207
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 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
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 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
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 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
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 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
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 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
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 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
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 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
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 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
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 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
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 134 if (ctx->frame_type == FRAMETYPE_INTRA) {
335
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 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
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 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
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 134 if (ctx->frame_type != FRAMETYPE_NULL) {
350 133 ctx->frame_flags = get_bits(&ctx->gb, 8);
351
352
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 133 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits(&ctx->gb, 24) : 0;
353
354
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 133 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
355
356 /* skip unknown extension if any */
357
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 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
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 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
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 399 if (band_flags & 1) {
392 ✗ band->is_empty = 1;
393 ✗ return 0;
394 }
395
396
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 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
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 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
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 399 if (band_flags & 0x10) {
406 252 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
407
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 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
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 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
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 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
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 399 if (ret < 0)
425 ✗ return ret;
426
427 399 band->checksum_present = get_bits1(&ctx->gb);
428
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 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
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 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
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 399 if (!ref_mb &&
468
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 133 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
469 ✗ return AVERROR_INVALIDDATA;
470
471
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 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
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 5187 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
482 4788 mb_offset = offs;
483
484
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 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
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 71820 if (get_bits1(&ctx->gb)) {
490
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 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
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 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
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 27025 if (band->inherit_mv && ref_mb){
506 /* motion vector inheritance */
507
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 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
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 44795 if (band->inherit_mv && ref_mb) {
517 28585 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
518
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 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
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 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
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 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
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 44795 if (!mb->type) {
540 13239 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
541 } else {
542
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 31556 if (band->inherit_mv && ref_mb){
543 /* motion vector inheritance */
544
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 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
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 71820 if (mb->type)
567
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 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
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 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
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 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
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 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
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 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
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 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 const FFCodec ff_indeo5_decoder = {
687 .p.name = "indeo5",
688 CODEC_LONG_NAME("Intel Indeo Video Interactive 5"),
689 .p.type = AVMEDIA_TYPE_VIDEO,
690 .p.id = AV_CODEC_ID_INDEO5,
691 .priv_data_size = sizeof(IVI45DecContext),
692 .init = decode_init,
693 .close = ff_ivi_decode_close,
694 FF_CODEC_DECODE_CB(ff_ivi_decode_frame),
695 .p.capabilities = AV_CODEC_CAP_DR1,
696 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
697 };
698