FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/indeo4.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 244 351 69.5%
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
1/3
✓ Branch 1 taken 202 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
1/2
✓ Branch 1 taken 101 times.
✗ Branch 2 not taken.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
1/2
✓ Branch 0 taken 101 times.
✗ Branch 1 not taken.
101 if (pic_conf.luma_bands)
181 101 pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
182
183
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
2/4
✓ Branch 0 taken 101 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 101 times.
101 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
190
1/6
✗ Branch 0 not taken.
✓ Branch 1 taken 101 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
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
2/2
✓ Branch 1 taken 1 times.
✓ Branch 2 taken 100 times.
101 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
198
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1 times.
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
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
4 for (p = 0; p <= 2; p++) {
208
4/4
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 3 times.
✓ Branch 3 taken 3 times.
6 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
209
3/4
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 2 times.
✓ Branch 2 taken 1 times.
✗ Branch 3 not taken.
3 ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
210
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 2 times.
3 ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
211 }
212 }
213
214
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1 times.
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
1/2
✓ Branch 1 taken 101 times.
✗ Branch 2 not taken.
101 ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
223
224 /* skip decTimeEst field if present */
225
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
101 if (get_bits1(&ctx->gb))
226 skip_bits(&ctx->gb, 8);
227
228 /* decode macroblock and block huffman codebooks */
229
2/4
✓ Branch 2 taken 101 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 101 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
1/2
✓ Branch 1 taken 101 times.
✗ Branch 2 not taken.
101 ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
242
243
1/2
✓ Branch 1 taken 101 times.
✗ Branch 2 not taken.
101 ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
244
245 /* skip picture header extension if any */
246
2/2
✓ Branch 1 taken 101 times.
✓ Branch 2 taken 101 times.
202 while (get_bits1(&ctx->gb)) {
247 ff_dlog(avctx, "Pic hdr extension encountered!\n");
248
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
101 if (get_bits_left(&ctx->gb) < 10)
249 return AVERROR_INVALIDDATA;
250 101 skip_bits(&ctx->gb, 8);
251 }
252
253
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 101 times.
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
2/4
✓ Branch 0 taken 301 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 301 times.
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
1/2
✓ Branch 0 taken 301 times.
✗ Branch 1 not taken.
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
1/2
✓ Branch 1 taken 301 times.
✗ Branch 2 not taken.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
301 if (!band->is_halfpel)
302 ctx->uses_fullpel = 1;
303
304 301 band->checksum_present = get_bits1(&ctx->gb);
305
1/2
✓ Branch 0 taken 301 times.
✗ Branch 1 not taken.
301 if (band->checksum_present)
306 301 band->checksum = get_bits(&ctx->gb, 16);
307
308 301 indx = get_bits(&ctx->gb, 2);
309
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
3/4
✓ Branch 1 taken 280 times.
✓ Branch 2 taken 21 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 280 times.
301 if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
322 21 transform_id = get_bits(&ctx->gb, 5);
323
1/2
✓ Branch 0 taken 21 times.
✗ Branch 1 not taken.
21 if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
324
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 21 times.
21 !transforms[transform_id].inv_trans) {
325 avpriv_request_sample(avctx, "Transform %d", transform_id);
326 return AVERROR_PATCHWELCOME;
327 }
328
4/6
✓ Branch 0 taken 14 times.
✓ Branch 1 taken 7 times.
✓ Branch 2 taken 14 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 21 times.
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
3/4
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 14 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 7 times.
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
3/6
✓ Branch 0 taken 21 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 21 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 21 times.
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
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 14 times.
21 if (transform_id < 10)
346 7 band->transform_size = 8;
347 else
348 14 band->transform_size = 4;
349
350
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 21 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 21 times.
21 if (scan_indx == 15) {
357 av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
358 return AVERROR_INVALIDDATA;
359 }
360
3/4
✓ Branch 0 taken 14 times.
✓ Branch 1 taken 7 times.
✓ Branch 2 taken 14 times.
✗ Branch 3 not taken.
21 if (scan_indx > 4 && scan_indx < 10) {
361
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 14 times.
14 if (band->blk_size != 4) {
362 av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
363 return AVERROR_INVALIDDATA;
364 }
365
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 7 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 21 times.
21 if (quant_mat == 31) {
375 av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
376 return AVERROR_INVALIDDATA;
377 }
378
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 21 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 280 times.
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
3/4
✓ Branch 0 taken 101 times.
✓ Branch 1 taken 200 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 101 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
3/4
✓ Branch 0 taken 101 times.
✓ Branch 1 taken 200 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 101 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 301 times.
301 if (!get_bits1(&ctx->gb))
408 arg_band->blk_vlc.tab = ctx->blk_vlc.tab;
409 else
410
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 301 times.
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
1/2
✓ Branch 1 taken 301 times.
✗ Branch 2 not taken.
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
2/2
✓ Branch 1 taken 253 times.
✓ Branch 2 taken 48 times.
301 if (get_bits1(&ctx->gb)) {
420 253 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
421
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 253 times.
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
2/2
✓ Branch 0 taken 3834 times.
✓ Branch 1 taken 253 times.
4087 for (i = 0; i < band->num_corr * 2; i++)
429 3834 band->corr[i] = get_bits(&ctx->gb, 8);
430 }
431 }
432
433
2/2
✓ Branch 0 taken 101 times.
✓ Branch 1 taken 200 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
2/2
✓ Branch 0 taken 101 times.
✓ Branch 1 taken 200 times.
301 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
482
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 301 times.
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
2/2
✓ Branch 0 taken 4515 times.
✓ Branch 1 taken 301 times.
4816 for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
494 4515 mb_offset = offs;
495
496
2/2
✓ Branch 0 taken 90300 times.
✓ Branch 1 taken 4515 times.
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
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 90300 times.
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
2/2
✓ Branch 1 taken 2014 times.
✓ Branch 2 taken 88286 times.
90300 if (get_bits1(&ctx->gb)) {
509
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2014 times.
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
4/6
✓ Branch 0 taken 56 times.
✓ Branch 1 taken 1958 times.
✓ Branch 2 taken 56 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 56 times.
✗ Branch 5 not taken.
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
3/4
✓ Branch 0 taken 1958 times.
✓ Branch 1 taken 56 times.
✓ Branch 2 taken 1958 times.
✗ Branch 3 not taken.
2014 if (band->inherit_mv && ref_mb) {
525 /* motion vector inheritance */
526
1/2
✓ Branch 0 taken 1958 times.
✗ Branch 1 not taken.
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
2/2
✓ Branch 0 taken 58042 times.
✓ Branch 1 taken 30244 times.
88286 if (band->inherit_mv) {
536 /* copy mb_type from corresponding reference mb */
537
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 58042 times.
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
2/2
✓ Branch 0 taken 28144 times.
✓ Branch 1 taken 2100 times.
30244 } else if (ctx->frame_type == IVI4_FRAMETYPE_INTRA ||
543
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 28144 times.
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
2/2
✓ Branch 0 taken 58042 times.
✓ Branch 1 taken 30244 times.
88286 if (band->inherit_qdelta) {
553
1/2
✓ Branch 0 taken 58042 times.
✗ Branch 1 not taken.
58042 if (ref_mb) mb->q_delta = ref_mb->q_delta;
554
4/6
✓ Branch 0 taken 967 times.
✓ Branch 1 taken 29277 times.
✓ Branch 2 taken 967 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 967 times.
✗ Branch 5 not taken.
30244 } else if (mb->cbp || (!band->plane && !band->band_num &&
555
1/2
✓ Branch 0 taken 967 times.
✗ Branch 1 not taken.
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
2/2
✓ Branch 0 taken 77874 times.
✓ Branch 1 taken 10412 times.
88286 if (!mb->type) {
562 77874 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
563 } else {
564
2/2
✓ Branch 0 taken 6274 times.
✓ Branch 1 taken 4138 times.
10412 if (band->inherit_mv) {
565
1/2
✓ Branch 0 taken 6274 times.
✗ Branch 1 not taken.
6274 if (ref_mb)
566 /* motion vector inheritance */
567
1/2
✓ Branch 0 taken 6274 times.
✗ Branch 1 not taken.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4138 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10412 times.
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
2/2
✓ Branch 0 taken 12426 times.
✓ Branch 1 taken 77874 times.
90300 if (mb->type)
608
1/2
✓ Branch 0 taken 12426 times.
✗ Branch 1 not taken.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12426 times.
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
2/2
✓ Branch 0 taken 60000 times.
✓ Branch 1 taken 30300 times.
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
2/2
✓ Branch 0 taken 54 times.
✓ Branch 1 taken 47 times.
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
2/2
✓ Branch 0 taken 54 times.
✓ Branch 1 taken 47 times.
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
4/4
✓ Branch 0 taken 54 times.
✓ Branch 1 taken 47 times.
✓ Branch 2 taken 7 times.
✓ Branch 3 taken 47 times.
101 if (is_prev_ref && is_ref) {
656 7 FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
657
2/2
✓ Branch 0 taken 47 times.
✓ Branch 1 taken 47 times.
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
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
2 if (!ctx->p_frame)
700 return AVERROR(ENOMEM);
701
702 2 return 0;
703 }
704
705
706 const 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 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
717 };
718