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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 "ivi_dsp.h" | |
34 | #include "ivi_common.h" | |
35 | #include "indeo4data.h" | |
36 | ||
37 | #define IVI4_PIC_SIZE_ESC 7 | |
38 | ||
39 | ||
40 | static const struct { | |
41 | InvTransformPtr *inv_trans; | |
42 | DCTransformPtr *dc_trans; | |
43 | int is_2d_trans; | |
44 | } transforms[18] = { | |
45 | { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, | |
46 | { ff_ivi_row_haar8, ff_ivi_dc_haar_2d, 0 }, | |
47 | { ff_ivi_col_haar8, ff_ivi_dc_haar_2d, 0 }, | |
48 | { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, | |
49 | { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, | |
50 | { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, | |
51 | { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, | |
52 | { NULL, NULL, 0 }, /* inverse DCT 8x8 */ | |
53 | { NULL, NULL, 0 }, /* inverse DCT 8x1 */ | |
54 | { NULL, NULL, 0 }, /* inverse DCT 1x8 */ | |
55 | { ff_ivi_inverse_haar_4x4, ff_ivi_dc_haar_2d, 1 }, | |
56 | { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, | |
57 | { NULL, NULL, 0 }, /* no transform 4x4 */ | |
58 | { ff_ivi_row_haar4, ff_ivi_dc_haar_2d, 0 }, | |
59 | { ff_ivi_col_haar4, ff_ivi_dc_haar_2d, 0 }, | |
60 | { ff_ivi_row_slant4, ff_ivi_dc_row_slant, 0 }, | |
61 | { ff_ivi_col_slant4, ff_ivi_dc_col_slant, 0 }, | |
62 | { NULL, NULL, 0 }, /* inverse DCT 4x4 */ | |
63 | }; | |
64 | ||
65 | /** | |
66 | * Decode subdivision of a plane. | |
67 | * This is a simplified version that checks for two supported subdivisions: | |
68 | * - 1 wavelet band per plane, size factor 1:1, code pattern: 3 | |
69 | * - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 | |
70 | * Anything else is either unsupported or corrupt. | |
71 | * | |
72 | * @param[in,out] gb the GetBit context | |
73 | * @return number of wavelet bands or 0 on error | |
74 | */ | |
75 | static int decode_plane_subdivision(GetBitContext *gb) | |
76 | { | |
77 | int i; | |
78 | ||
79 | switch (get_bits(gb, 2)) { | |
80 | case 3: | |
81 | return 1; | |
82 | case 2: | |
83 | for (i = 0; i < 4; i++) | |
84 | if (get_bits(gb, 2) != 3) | |
85 | return 0; | |
86 | return 4; | |
87 | default: | |
88 | return 0; | |
89 | } | |
90 | } | |
91 | ||
92 | static inline int scale_tile_size(int def_size, int size_factor) | |
93 | { | |
94 | return size_factor == 15 ? def_size : (size_factor + 1) << 5; | |
95 | } | |
96 | ||
97 | /** | |
98 | * Decode Indeo 4 picture header. | |
99 | * | |
100 | * @param[in,out] ctx pointer to the decoder context | |
101 | * @param[in] avctx pointer to the AVCodecContext | |
102 | * @return result code: 0 = OK, negative number = error | |
103 | */ | |
104 | static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) | |
105 | { | |
106 | int pic_size_indx, i, p; | |
107 | IVIPicConfig pic_conf; | |
108 | ||
109 | if (get_bits(&ctx->gb, 18) != 0x3FFF8) { | |
110 | av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); | |
111 | return AVERROR_INVALIDDATA; | |
112 | } | |
113 | ||
114 | ctx->prev_frame_type = ctx->frame_type; | |
115 | ctx->frame_type = get_bits(&ctx->gb, 3); | |
116 | if (ctx->frame_type == 7) { | |
117 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); | |
118 | return AVERROR_INVALIDDATA; | |
119 | } | |
120 | ||
121 | #if IVI4_STREAM_ANALYSER | |
122 | if (ctx->frame_type == IVI4_FRAMETYPE_BIDIR) | |
123 | ctx->has_b_frames = 1; | |
124 | #endif | |
125 | ||
126 | ctx->transp_status = get_bits1(&ctx->gb); | |
127 | #if IVI4_STREAM_ANALYSER | |
128 | if (ctx->transp_status) { | |
129 | ctx->has_transp = 1; | |
130 | } | |
131 | #endif | |
132 | ||
133 | /* unknown bit: Mac decoder ignores this bit, XANIM returns error */ | |
134 | if (get_bits1(&ctx->gb)) { | |
135 | av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); | |
136 | return AVERROR_INVALIDDATA; | |
137 | } | |
138 | ||
139 | ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; | |
140 | ||
141 | /* null frames don't contain anything else so we just return */ | |
142 | if (ctx->frame_type >= IVI4_FRAMETYPE_NULL_FIRST) { | |
143 | av_dlog(avctx, "Null frame encountered!\n"); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | /* Check key lock status. If enabled - ignore lock word. */ | |
148 | /* Usually we have to prompt the user for the password, but */ | |
149 | /* we don't do that because Indeo 4 videos can be decoded anyway */ | |
150 | if (get_bits1(&ctx->gb)) { | |
151 | skip_bits_long(&ctx->gb, 32); | |
152 | av_dlog(avctx, "Password-protected clip!\n"); | |
153 | } | |
154 | ||
155 | pic_size_indx = get_bits(&ctx->gb, 3); | |
156 | if (pic_size_indx == IVI4_PIC_SIZE_ESC) { | |
157 | pic_conf.pic_height = get_bits(&ctx->gb, 16); | |
158 | pic_conf.pic_width = get_bits(&ctx->gb, 16); | |
159 | } else { | |
160 | pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; | |
161 | pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; | |
162 | } | |
163 | ||
164 | /* Decode tile dimensions. */ | |
165 | if (get_bits1(&ctx->gb)) { | |
166 | pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); | |
167 | pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); | |
168 | #if IVI4_STREAM_ANALYSER | |
169 | ctx->uses_tiling = 1; | |
170 | #endif | |
171 | } else { | |
172 | pic_conf.tile_height = pic_conf.pic_height; | |
173 | pic_conf.tile_width = pic_conf.pic_width; | |
174 | } | |
175 | ||
176 | /* Decode chroma subsampling. We support only 4:4 aka YVU9. */ | |
177 | if (get_bits(&ctx->gb, 2)) { | |
178 | av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); | |
179 | return AVERROR_INVALIDDATA; | |
180 | } | |
181 | pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; | |
182 | pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; | |
183 | ||
184 | /* decode subdivision of the planes */ | |
185 | pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); | |
186 | pic_conf.chroma_bands = 0; | |
187 | if (pic_conf.luma_bands) | |
188 | pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); | |
189 | ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; | |
190 | 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 | if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { | |
198 | if (ff_ivi_init_planes(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 | ctx->pic_conf = pic_conf; | |
205 | ||
206 | /* set default macroblock/block dimensions */ | |
207 | for (p = 0; p <= 2; p++) { | |
208 | for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { | |
209 | ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; | |
210 | ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; | |
211 | } | |
212 | } | |
213 | ||
214 | if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, | |
215 | 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 | ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; | |
223 | ||
224 | /* skip decTimeEst field if present */ | |
225 | if (get_bits1(&ctx->gb)) | |
226 | skip_bits(&ctx->gb, 8); | |
227 | ||
228 | /* decode macroblock and block huffman codebooks */ | |
229 | if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || | |
230 | ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) | |
231 | return AVERROR_INVALIDDATA; | |
232 | ||
233 | ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; | |
234 | ||
235 | ctx->in_imf = get_bits1(&ctx->gb); | |
236 | ctx->in_q = get_bits1(&ctx->gb); | |
237 | ||
238 | ctx->pic_glob_quant = get_bits(&ctx->gb, 5); | |
239 | ||
240 | /* TODO: ignore this parameter if unused */ | |
241 | ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; | |
242 | ||
243 | ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; | |
244 | ||
245 | /* skip picture header extension if any */ | |
246 | while (get_bits1(&ctx->gb)) { | |
247 | av_dlog(avctx, "Pic hdr extension encountered!\n"); | |
248 | skip_bits(&ctx->gb, 8); | |
249 | } | |
250 | ||
251 | if (get_bits1(&ctx->gb)) { | |
252 | av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); | |
253 | } | |
254 | ||
255 | align_get_bits(&ctx->gb); | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | ||
261 | /** | |
262 | * Decode Indeo 4 band header. | |
263 | * | |
264 | * @param[in,out] ctx pointer to the decoder context | |
265 | * @param[in,out] band pointer to the band descriptor | |
266 | * @param[in] avctx pointer to the AVCodecContext | |
267 | * @return result code: 0 = OK, negative number = error | |
268 | */ | |
269 | static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, | |
270 | AVCodecContext *avctx) | |
271 | { | |
272 | int plane, band_num, indx, transform_id, scan_indx; | |
273 | int i; | |
274 | int quant_mat; | |
275 | ||
276 | plane = get_bits(&ctx->gb, 2); | |
277 | band_num = get_bits(&ctx->gb, 4); | |
278 | if (band->plane != plane || band->band_num != band_num) { | |
279 | av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); | |
280 | return AVERROR_INVALIDDATA; | |
281 | } | |
282 | ||
283 | band->is_empty = get_bits1(&ctx->gb); | |
284 | if (!band->is_empty) { | |
285 | int old_blk_size = band->blk_size; | |
286 | /* skip header size | |
287 | * If header size is not given, header size is 4 bytes. */ | |
288 | if (get_bits1(&ctx->gb)) | |
289 | skip_bits(&ctx->gb, 16); | |
290 | ||
291 | band->is_halfpel = get_bits(&ctx->gb, 2); | |
292 | if (band->is_halfpel >= 2) { | |
293 | av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", | |
294 | band->is_halfpel); | |
295 | return AVERROR_INVALIDDATA; | |
296 | } | |
297 | #if IVI4_STREAM_ANALYSER | |
298 | if (!band->is_halfpel) | |
299 | ctx->uses_fullpel = 1; | |
300 | #endif | |
301 | ||
302 | band->checksum_present = get_bits1(&ctx->gb); | |
303 | if (band->checksum_present) | |
304 | band->checksum = get_bits(&ctx->gb, 16); | |
305 | ||
306 | indx = get_bits(&ctx->gb, 2); | |
307 | if (indx == 3) { | |
308 | av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); | |
309 | return AVERROR_INVALIDDATA; | |
310 | } | |
311 | band->mb_size = 16 >> indx; | |
312 | band->blk_size = 8 >> (indx >> 1); | |
313 | ||
314 | band->inherit_mv = get_bits1(&ctx->gb); | |
315 | band->inherit_qdelta = get_bits1(&ctx->gb); | |
316 | ||
317 | band->glob_quant = get_bits(&ctx->gb, 5); | |
318 | ||
319 | if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) { | |
320 | transform_id = get_bits(&ctx->gb, 5); | |
321 | if (transform_id >= FF_ARRAY_ELEMS(transforms) || | |
322 | !transforms[transform_id].inv_trans) { | |
323 | avpriv_request_sample(avctx, "Transform %d", transform_id); | |
324 | return AVERROR_PATCHWELCOME; | |
325 | } | |
326 | if ((transform_id >= 7 && transform_id <= 9) || | |
327 | transform_id == 17) { | |
328 | avpriv_request_sample(avctx, "DCT transform"); | |
329 | return AVERROR_PATCHWELCOME; | |
330 | } | |
331 | ||
332 | if (transform_id < 10 && band->blk_size < 8) { | |
333 | av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n"); | |
334 | return AVERROR_INVALIDDATA; | |
335 | } | |
336 | #if IVI4_STREAM_ANALYSER | |
337 | if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) | |
338 | ctx->uses_haar = 1; | |
339 | #endif | |
340 | ||
341 | band->inv_transform = transforms[transform_id].inv_trans; | |
342 | band->dc_transform = transforms[transform_id].dc_trans; | |
343 | band->is_2d_trans = transforms[transform_id].is_2d_trans; | |
344 | ||
345 | if (transform_id < 10) | |
346 | band->transform_size = 8; | |
347 | else | |
348 | band->transform_size = 4; | |
349 | ||
350 | 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 | scan_indx = get_bits(&ctx->gb, 4); | |
356 | if (scan_indx == 15) { | |
357 | av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); | |
358 | return AVERROR_INVALIDDATA; | |
359 | } | |
360 | if (scan_indx > 4 && scan_indx < 10) { | |
361 | if (band->blk_size != 4) { | |
362 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); | |
363 | return AVERROR_INVALIDDATA; | |
364 | } | |
365 | } else if (band->blk_size != 8) { | |
366 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); | |
367 | return AVERROR_INVALIDDATA; | |
368 | } | |
369 | ||
370 | band->scan = scan_index_to_tab[scan_indx]; | |
371 | band->scan_size = band->blk_size; | |
372 | ||
373 | quant_mat = get_bits(&ctx->gb, 5); | |
374 | if (quant_mat == 31) { | |
375 | av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n"); | |
376 | return AVERROR_INVALIDDATA; | |
377 | } | |
378 | 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 | band->quant_mat = quant_mat; | |
384 | } else { | |
385 | 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 | 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 | if (band->scan_size != band->blk_size) { | |
398 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); | |
399 | return AVERROR_INVALIDDATA; | |
400 | } | |
401 | 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 | if (!get_bits1(&ctx->gb)) | |
408 | band->blk_vlc.tab = ctx->blk_vlc.tab; | |
409 | else | |
410 | if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF, | |
411 | &band->blk_vlc, avctx)) | |
412 | return AVERROR_INVALIDDATA; | |
413 | ||
414 | /* select appropriate rvmap table for this band */ | |
415 | band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; | |
416 | ||
417 | /* decode rvmap probability corrections if any */ | |
418 | band->num_corr = 0; /* there is no corrections */ | |
419 | if (get_bits1(&ctx->gb)) { | |
420 | band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ | |
421 | 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 | for (i = 0; i < band->num_corr * 2; i++) | |
429 | band->corr[i] = get_bits(&ctx->gb, 8); | |
430 | } | |
431 | } | |
432 | ||
433 | if (band->blk_size == 8) { | |
434 | band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; | |
435 | band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; | |
436 | } else { | |
437 | band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; | |
438 | 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 | band->intra_scale = NULL; | |
443 | band->inter_scale = NULL; | |
444 | ||
445 | align_get_bits(&ctx->gb); | |
446 | ||
447 | if (!band->scan) { | |
448 | av_log(avctx, AV_LOG_ERROR, "band->scan not set\n"); | |
449 | return AVERROR_INVALIDDATA; | |
450 | } | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | ||
456 | /** | |
457 | * Decode information (block type, cbp, quant delta, motion vector) | |
458 | * for all macroblocks in the current tile. | |
459 | * | |
460 | * @param[in,out] ctx pointer to the decoder context | |
461 | * @param[in,out] band pointer to the band descriptor | |
462 | * @param[in,out] tile pointer to the tile descriptor | |
463 | * @param[in] avctx pointer to the AVCodecContext | |
464 | * @return result code: 0 = OK, negative number = error | |
465 | */ | |
466 | static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, | |
467 | IVITile *tile, AVCodecContext *avctx) | |
468 | { | |
469 | int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb, | |
470 | mv_scale, mb_type_bits, s; | |
471 | IVIMbInfo *mb, *ref_mb; | |
472 | int row_offset = band->mb_size * band->pitch; | |
473 | ||
474 | mb = tile->mbs; | |
475 | ref_mb = tile->ref_mbs; | |
476 | offs = tile->ypos * band->pitch + tile->xpos; | |
477 | ||
478 | blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; | |
479 | mb_type_bits = ctx->frame_type == IVI4_FRAMETYPE_BIDIR ? 2 : 1; | |
480 | ||
481 | /* scale factor for motion vectors */ | |
482 | mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); | |
483 | mv_x = mv_y = 0; | |
484 | ||
485 | if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) { | |
486 | av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs); | |
487 | return -1; | |
488 | } | |
489 | ||
490 | for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) { | |
491 | mb_offset = offs; | |
492 | ||
493 | for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) { | |
494 | mb->xpos = x; | |
495 | mb->ypos = y; | |
496 | mb->buf_offs = mb_offset; | |
497 | mb->b_mv_x = | |
498 | mb->b_mv_y = 0; | |
499 | ||
500 | if (get_bits1(&ctx->gb)) { | |
501 | if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) { | |
502 | av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); | |
503 | return AVERROR_INVALIDDATA; | |
504 | } | |
505 | mb->type = 1; /* empty macroblocks are always INTER */ | |
506 | mb->cbp = 0; /* all blocks are empty */ | |
507 | ||
508 | mb->q_delta = 0; | |
509 | if (!band->plane && !band->band_num && ctx->in_q) { | |
510 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, | |
511 | IVI_VLC_BITS, 1); | |
512 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); | |
513 | } | |
514 | ||
515 | mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ | |
516 | if (band->inherit_mv && ref_mb) { | |
517 | /* motion vector inheritance */ | |
518 | if (mv_scale) { | |
519 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); | |
520 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); | |
521 | } else { | |
522 | mb->mv_x = ref_mb->mv_x; | |
523 | mb->mv_y = ref_mb->mv_y; | |
524 | } | |
525 | } | |
526 | } else { | |
527 | if (band->inherit_mv) { | |
528 | /* copy mb_type from corresponding reference mb */ | |
529 | if (!ref_mb) { | |
530 | av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n"); | |
531 | return AVERROR_INVALIDDATA; | |
532 | } | |
533 | mb->type = ref_mb->type; | |
534 | } else if (ctx->frame_type == IVI4_FRAMETYPE_INTRA || | |
535 | ctx->frame_type == IVI4_FRAMETYPE_INTRA1) { | |
536 | mb->type = 0; /* mb_type is always INTRA for intra-frames */ | |
537 | } else { | |
538 | mb->type = get_bits(&ctx->gb, mb_type_bits); | |
539 | } | |
540 | ||
541 | mb->cbp = get_bits(&ctx->gb, blks_per_mb); | |
542 | ||
543 | mb->q_delta = 0; | |
544 | if (band->inherit_qdelta) { | |
545 | if (ref_mb) mb->q_delta = ref_mb->q_delta; | |
546 | } else if (mb->cbp || (!band->plane && !band->band_num && | |
547 | ctx->in_q)) { | |
548 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, | |
549 | IVI_VLC_BITS, 1); | |
550 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); | |
551 | } | |
552 | ||
553 | if (!mb->type) { | |
554 | mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ | |
555 | } else { | |
556 | if (band->inherit_mv) { | |
557 | if (ref_mb) | |
558 | /* motion vector inheritance */ | |
559 | if (mv_scale) { | |
560 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); | |
561 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); | |
562 | } else { | |
563 | mb->mv_x = ref_mb->mv_x; | |
564 | mb->mv_y = ref_mb->mv_y; | |
565 | } | |
566 | } else { | |
567 | /* decode motion vector deltas */ | |
568 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, | |
569 | IVI_VLC_BITS, 1); | |
570 | mv_y += IVI_TOSIGNED(mv_delta); | |
571 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, | |
572 | IVI_VLC_BITS, 1); | |
573 | mv_x += IVI_TOSIGNED(mv_delta); | |
574 | mb->mv_x = mv_x; | |
575 | mb->mv_y = mv_y; | |
576 | if (mb->type == 3) { | |
577 | mv_delta = get_vlc2(&ctx->gb, | |
578 | ctx->mb_vlc.tab->table, | |
579 | IVI_VLC_BITS, 1); | |
580 | mv_y += IVI_TOSIGNED(mv_delta); | |
581 | mv_delta = get_vlc2(&ctx->gb, | |
582 | ctx->mb_vlc.tab->table, | |
583 | IVI_VLC_BITS, 1); | |
584 | mv_x += IVI_TOSIGNED(mv_delta); | |
585 | mb->b_mv_x = -mv_x; | |
586 | mb->b_mv_y = -mv_y; | |
587 | } | |
588 | } | |
589 | if (mb->type == 2) { | |
590 | mb->b_mv_x = -mb->mv_x; | |
591 | mb->b_mv_y = -mb->mv_y; | |
592 | mb->mv_x = 0; | |
593 | mb->mv_y = 0; | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
598 | s= band->is_halfpel; | |
599 | if (mb->type) | |
600 | if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || | |
601 | x + ((mb->mv_x+s)>>s) + band->mb_size - 1 | |
602 | + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) { | |
603 | av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); | |
604 | return AVERROR_INVALIDDATA; | |
605 | } | |
606 | ||
607 | mb++; | |
608 | if (ref_mb) | |
609 | ref_mb++; | |
610 | mb_offset += band->mb_size; | |
611 | } | |
612 | ||
613 | offs += row_offset; | |
614 | } | |
615 | ||
616 | align_get_bits(&ctx->gb); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | ||
622 | /** | |
623 | * Rearrange decoding and reference buffers. | |
624 | * | |
625 | * @param[in,out] ctx pointer to the decoder context | |
626 | */ | |
627 | static void switch_buffers(IVI45DecContext *ctx) | |
628 | { | |
629 | int is_prev_ref = 0, is_ref = 0; | |
630 | ||
631 | switch (ctx->prev_frame_type) { | |
632 | case IVI4_FRAMETYPE_INTRA: | |
633 | case IVI4_FRAMETYPE_INTRA1: | |
634 | case IVI4_FRAMETYPE_INTER: | |
635 | is_prev_ref = 1; | |
636 | break; | |
637 | } | |
638 | ||
639 | switch (ctx->frame_type) { | |
640 | case IVI4_FRAMETYPE_INTRA: | |
641 | case IVI4_FRAMETYPE_INTRA1: | |
642 | case IVI4_FRAMETYPE_INTER: | |
643 | is_ref = 1; | |
644 | break; | |
645 | } | |
646 | ||
647 | if (is_prev_ref && is_ref) { | |
648 | FFSWAP(int, ctx->dst_buf, ctx->ref_buf); | |
649 | } else if (is_prev_ref) { | |
650 | FFSWAP(int, ctx->ref_buf, ctx->b_ref_buf); | |
651 | FFSWAP(int, ctx->dst_buf, ctx->ref_buf); | |
652 | } | |
653 | } | |
654 | ||
655 | ||
656 | static int is_nonnull_frame(IVI45DecContext *ctx) | |
657 | { | |
658 | return ctx->frame_type < IVI4_FRAMETYPE_NULL_FIRST; | |
659 | } | |
660 | ||
661 | ||
662 | static av_cold int decode_init(AVCodecContext *avctx) | |
663 | { | |
664 | IVI45DecContext *ctx = avctx->priv_data; | |
665 | ||
666 | ff_ivi_init_static_vlc(); | |
667 | ||
668 | /* copy rvmap tables in our context so we can apply changes to them */ | |
669 | memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); | |
670 | ||
671 | /* Force allocation of the internal buffers */ | |
672 | /* during picture header decoding. */ | |
673 | ctx->pic_conf.pic_width = 0; | |
674 | ctx->pic_conf.pic_height = 0; | |
675 | ||
676 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; | |
677 | ||
678 | ctx->decode_pic_hdr = decode_pic_hdr; | |
679 | ctx->decode_band_hdr = decode_band_hdr; | |
680 | ctx->decode_mb_info = decode_mb_info; | |
681 | ctx->switch_buffers = switch_buffers; | |
682 | ctx->is_nonnull_frame = is_nonnull_frame; | |
683 | ||
684 | ctx->is_indeo4 = 1; | |
685 | ||
686 | ctx->dst_buf = 0; | |
687 | ctx->ref_buf = 1; | |
688 | ctx->b_ref_buf = 3; /* buffer 2 is used for scalability mode */ | |
689 | ctx->p_frame = av_frame_alloc(); | |
690 | if (!ctx->p_frame) | |
691 | return AVERROR(ENOMEM); | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | ||
697 | AVCodec ff_indeo4_decoder = { | |
698 | .name = "indeo4", | |
699 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"), | |
700 | .type = AVMEDIA_TYPE_VIDEO, | |
701 | .id = AV_CODEC_ID_INDEO4, | |
702 | .priv_data_size = sizeof(IVI45DecContext), | |
703 | .init = decode_init, | |
704 | .close = ff_ivi_decode_close, | |
705 | .decode = ff_ivi_decode_frame, | |
706 | .capabilities = CODEC_CAP_DR1, | |
707 | }; |