blob: 5f931c8b985bc66637f85da8e82c7f7d9c7acbbe
1 | /* |
2 | * Indeo Video Interactive v5 compatible decoder |
3 | * Copyright (c) 2009 Maxim Poliakovski |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | /** |
23 | * @file |
24 | * Indeo Video Interactive version 5 decoder |
25 | * |
26 | * Indeo5 data is usually transported within .avi or .mov files. |
27 | * Known FOURCCs: 'IV50' |
28 | */ |
29 | |
30 | #define BITSTREAM_READER_LE |
31 | #include "avcodec.h" |
32 | #include "get_bits.h" |
33 | #include "ivi.h" |
34 | #include "ivi_dsp.h" |
35 | #include "indeo5data.h" |
36 | |
37 | /** |
38 | * Indeo5 frame types. |
39 | */ |
40 | enum { |
41 | FRAMETYPE_INTRA = 0, |
42 | FRAMETYPE_INTER = 1, ///< non-droppable P-frame |
43 | FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode |
44 | FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame |
45 | FRAMETYPE_NULL = 4 ///< empty frame with no data |
46 | }; |
47 | |
48 | #define IVI5_PIC_SIZE_ESC 15 |
49 | |
50 | /** |
51 | * Decode Indeo5 GOP (Group of pictures) header. |
52 | * This header is present in key frames only. |
53 | * It defines parameters for all frames in a GOP. |
54 | * |
55 | * @param[in,out] ctx ptr to the decoder context |
56 | * @param[in] avctx ptr to the AVCodecContext |
57 | * @return result code: 0 = OK, -1 = error |
58 | */ |
59 | static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) |
60 | { |
61 | int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; |
62 | int quant_mat, blk_size_changed = 0; |
63 | IVIBandDesc *band, *band1, *band2; |
64 | IVIPicConfig pic_conf; |
65 | |
66 | ctx->gop_flags = get_bits(&ctx->gb, 8); |
67 | |
68 | ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; |
69 | |
70 | if (ctx->gop_flags & IVI5_IS_PROTECTED) |
71 | ctx->lock_word = get_bits_long(&ctx->gb, 32); |
72 | |
73 | tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; |
74 | if (tile_size > 256) { |
75 | av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); |
76 | return AVERROR_INVALIDDATA; |
77 | } |
78 | |
79 | /* decode number of wavelet bands */ |
80 | /* num_levels * 3 + 1 */ |
81 | pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; |
82 | pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; |
83 | is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
84 | if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { |
85 | av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", |
86 | pic_conf.luma_bands, pic_conf.chroma_bands); |
87 | return AVERROR_INVALIDDATA; |
88 | } |
89 | |
90 | pic_size_indx = get_bits(&ctx->gb, 4); |
91 | if (pic_size_indx == IVI5_PIC_SIZE_ESC) { |
92 | pic_conf.pic_height = get_bits(&ctx->gb, 13); |
93 | pic_conf.pic_width = get_bits(&ctx->gb, 13); |
94 | } else { |
95 | pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; |
96 | pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; |
97 | } |
98 | |
99 | if (ctx->gop_flags & 2) { |
100 | avpriv_report_missing_feature(avctx, "YV12 picture format"); |
101 | return AVERROR_PATCHWELCOME; |
102 | } |
103 | |
104 | pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
105 | pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
106 | |
107 | if (!tile_size) { |
108 | pic_conf.tile_height = pic_conf.pic_height; |
109 | pic_conf.tile_width = pic_conf.pic_width; |
110 | } else { |
111 | pic_conf.tile_height = pic_conf.tile_width = tile_size; |
112 | } |
113 | |
114 | /* check if picture layout was changed and reallocate buffers */ |
115 | if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) { |
116 | result = ff_ivi_init_planes(ctx->planes, &pic_conf, 0); |
117 | if (result < 0) { |
118 | av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
119 | return result; |
120 | } |
121 | ctx->pic_conf = pic_conf; |
122 | ctx->is_scalable = is_scalable; |
123 | blk_size_changed = 1; /* force reallocation of the internal structures */ |
124 | } |
125 | |
126 | for (p = 0; p <= 1; p++) { |
127 | for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
128 | band = &ctx->planes[p].bands[i]; |
129 | |
130 | band->is_halfpel = get_bits1(&ctx->gb); |
131 | |
132 | mb_size = get_bits1(&ctx->gb); |
133 | blk_size = 8 >> get_bits1(&ctx->gb); |
134 | mb_size = blk_size << !mb_size; |
135 | |
136 | if (p==0 && blk_size==4) { |
137 | av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); |
138 | return AVERROR_PATCHWELCOME; |
139 | } |
140 | |
141 | blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; |
142 | if (blk_size_changed) { |
143 | band->mb_size = mb_size; |
144 | band->blk_size = blk_size; |
145 | } |
146 | |
147 | if (get_bits1(&ctx->gb)) { |
148 | avpriv_report_missing_feature(avctx, "Extended transform info"); |
149 | return AVERROR_PATCHWELCOME; |
150 | } |
151 | |
152 | /* select transform function and scan pattern according to plane and band number */ |
153 | switch ((p << 2) + i) { |
154 | case 0: |
155 | band->inv_transform = ff_ivi_inverse_slant_8x8; |
156 | band->dc_transform = ff_ivi_dc_slant_2d; |
157 | band->scan = ff_zigzag_direct; |
158 | band->transform_size = 8; |
159 | break; |
160 | |
161 | case 1: |
162 | band->inv_transform = ff_ivi_row_slant8; |
163 | band->dc_transform = ff_ivi_dc_row_slant; |
164 | band->scan = ff_ivi_vertical_scan_8x8; |
165 | band->transform_size = 8; |
166 | break; |
167 | |
168 | case 2: |
169 | band->inv_transform = ff_ivi_col_slant8; |
170 | band->dc_transform = ff_ivi_dc_col_slant; |
171 | band->scan = ff_ivi_horizontal_scan_8x8; |
172 | band->transform_size = 8; |
173 | break; |
174 | |
175 | case 3: |
176 | band->inv_transform = ff_ivi_put_pixels_8x8; |
177 | band->dc_transform = ff_ivi_put_dc_pixel_8x8; |
178 | band->scan = ff_ivi_horizontal_scan_8x8; |
179 | band->transform_size = 8; |
180 | break; |
181 | |
182 | case 4: |
183 | band->inv_transform = ff_ivi_inverse_slant_4x4; |
184 | band->dc_transform = ff_ivi_dc_slant_2d; |
185 | band->scan = ff_ivi_direct_scan_4x4; |
186 | band->transform_size = 4; |
187 | break; |
188 | } |
189 | |
190 | band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || |
191 | band->inv_transform == ff_ivi_inverse_slant_4x4; |
192 | |
193 | if (band->transform_size != band->blk_size) { |
194 | av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); |
195 | return AVERROR_INVALIDDATA; |
196 | } |
197 | |
198 | /* select dequant matrix according to plane and band number */ |
199 | if (!p) { |
200 | quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; |
201 | } else { |
202 | quant_mat = 5; |
203 | } |
204 | |
205 | if (band->blk_size == 8) { |
206 | if(quant_mat >= 5){ |
207 | av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); |
208 | return -1; |
209 | } |
210 | band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; |
211 | band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; |
212 | band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; |
213 | band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; |
214 | } else { |
215 | band->intra_base = ivi5_base_quant_4x4_intra; |
216 | band->inter_base = ivi5_base_quant_4x4_inter; |
217 | band->intra_scale = ivi5_scale_quant_4x4_intra; |
218 | band->inter_scale = ivi5_scale_quant_4x4_inter; |
219 | } |
220 | |
221 | if (get_bits(&ctx->gb, 2)) { |
222 | av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); |
223 | return AVERROR_INVALIDDATA; |
224 | } |
225 | } |
226 | } |
227 | |
228 | /* copy chroma parameters into the 2nd chroma plane */ |
229 | for (i = 0; i < pic_conf.chroma_bands; i++) { |
230 | band1 = &ctx->planes[1].bands[i]; |
231 | band2 = &ctx->planes[2].bands[i]; |
232 | |
233 | band2->width = band1->width; |
234 | band2->height = band1->height; |
235 | band2->mb_size = band1->mb_size; |
236 | band2->blk_size = band1->blk_size; |
237 | band2->is_halfpel = band1->is_halfpel; |
238 | band2->intra_base = band1->intra_base; |
239 | band2->inter_base = band1->inter_base; |
240 | band2->intra_scale = band1->intra_scale; |
241 | band2->inter_scale = band1->inter_scale; |
242 | band2->scan = band1->scan; |
243 | band2->inv_transform = band1->inv_transform; |
244 | band2->dc_transform = band1->dc_transform; |
245 | band2->is_2d_trans = band1->is_2d_trans; |
246 | band2->transform_size= band1->transform_size; |
247 | } |
248 | |
249 | /* reallocate internal structures if needed */ |
250 | if (blk_size_changed) { |
251 | result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, |
252 | pic_conf.tile_height); |
253 | if (result < 0) { |
254 | av_log(avctx, AV_LOG_ERROR, |
255 | "Couldn't reallocate internal structures!\n"); |
256 | return result; |
257 | } |
258 | } |
259 | |
260 | if (ctx->gop_flags & 8) { |
261 | if (get_bits(&ctx->gb, 3)) { |
262 | av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); |
263 | return AVERROR_INVALIDDATA; |
264 | } |
265 | |
266 | if (get_bits1(&ctx->gb)) |
267 | skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ |
268 | } |
269 | |
270 | align_get_bits(&ctx->gb); |
271 | |
272 | skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ |
273 | |
274 | /* skip GOP extension if any */ |
275 | if (get_bits1(&ctx->gb)) { |
276 | do { |
277 | i = get_bits(&ctx->gb, 16); |
278 | } while (i & 0x8000); |
279 | } |
280 | |
281 | align_get_bits(&ctx->gb); |
282 | |
283 | return 0; |
284 | } |
285 | |
286 | |
287 | /** |
288 | * Skip a header extension. |
289 | * |
290 | * @param[in,out] gb the GetBit context |
291 | */ |
292 | static inline int skip_hdr_extension(GetBitContext *gb) |
293 | { |
294 | int i, len; |
295 | |
296 | do { |
297 | len = get_bits(gb, 8); |
298 | if (8*len > get_bits_left(gb)) |
299 | return AVERROR_INVALIDDATA; |
300 | for (i = 0; i < len; i++) skip_bits(gb, 8); |
301 | } while(len); |
302 | |
303 | return 0; |
304 | } |
305 | |
306 | |
307 | /** |
308 | * Decode Indeo5 picture header. |
309 | * |
310 | * @param[in,out] ctx ptr to the decoder context |
311 | * @param[in] avctx ptr to the AVCodecContext |
312 | * @return result code: 0 = OK, -1 = error |
313 | */ |
314 | static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
315 | { |
316 | int ret; |
317 | |
318 | if (get_bits(&ctx->gb, 5) != 0x1F) { |
319 | av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); |
320 | return AVERROR_INVALIDDATA; |
321 | } |
322 | |
323 | ctx->prev_frame_type = ctx->frame_type; |
324 | ctx->frame_type = get_bits(&ctx->gb, 3); |
325 | if (ctx->frame_type >= 5) { |
326 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); |
327 | return AVERROR_INVALIDDATA; |
328 | } |
329 | |
330 | ctx->frame_num = get_bits(&ctx->gb, 8); |
331 | |
332 | if (ctx->frame_type == FRAMETYPE_INTRA) { |
333 | if ((ret = decode_gop_header(ctx, avctx)) < 0) { |
334 | av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n"); |
335 | ctx->gop_invalid = 1; |
336 | return ret; |
337 | } |
338 | ctx->gop_invalid = 0; |
339 | } |
340 | |
341 | if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { |
342 | av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n"); |
343 | ctx->frame_type = FRAMETYPE_INTER; |
344 | return AVERROR_INVALIDDATA; |
345 | } |
346 | |
347 | if (ctx->frame_type != FRAMETYPE_NULL) { |
348 | ctx->frame_flags = get_bits(&ctx->gb, 8); |
349 | |
350 | ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; |
351 | |
352 | ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; |
353 | |
354 | /* skip unknown extension if any */ |
355 | if (ctx->frame_flags & 0x20) |
356 | skip_hdr_extension(&ctx->gb); /* XXX: untested */ |
357 | |
358 | /* decode macroblock huffman codebook */ |
359 | ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, |
360 | IVI_MB_HUFF, &ctx->mb_vlc, avctx); |
361 | if (ret < 0) |
362 | return ret; |
363 | |
364 | skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ |
365 | } |
366 | |
367 | align_get_bits(&ctx->gb); |
368 | |
369 | return 0; |
370 | } |
371 | |
372 | |
373 | /** |
374 | * Decode Indeo5 band header. |
375 | * |
376 | * @param[in,out] ctx ptr to the decoder context |
377 | * @param[in,out] band ptr to the band descriptor |
378 | * @param[in] avctx ptr to the AVCodecContext |
379 | * @return result code: 0 = OK, -1 = error |
380 | */ |
381 | static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
382 | AVCodecContext *avctx) |
383 | { |
384 | int i, ret; |
385 | uint8_t band_flags; |
386 | |
387 | band_flags = get_bits(&ctx->gb, 8); |
388 | |
389 | if (band_flags & 1) { |
390 | band->is_empty = 1; |
391 | return 0; |
392 | } |
393 | |
394 | band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; |
395 | |
396 | band->inherit_mv = band_flags & 2; |
397 | band->inherit_qdelta = band_flags & 8; |
398 | band->qdelta_present = band_flags & 4; |
399 | if (!band->qdelta_present) band->inherit_qdelta = 1; |
400 | |
401 | /* decode rvmap probability corrections if any */ |
402 | band->num_corr = 0; /* there are no corrections */ |
403 | if (band_flags & 0x10) { |
404 | band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ |
405 | if (band->num_corr > 61) { |
406 | av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", |
407 | band->num_corr); |
408 | return AVERROR_INVALIDDATA; |
409 | } |
410 | |
411 | /* read correction pairs */ |
412 | for (i = 0; i < band->num_corr * 2; i++) |
413 | band->corr[i] = get_bits(&ctx->gb, 8); |
414 | } |
415 | |
416 | /* select appropriate rvmap table for this band */ |
417 | band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; |
418 | |
419 | /* decode block huffman codebook */ |
420 | ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, |
421 | &band->blk_vlc, avctx); |
422 | if (ret < 0) |
423 | return ret; |
424 | |
425 | band->checksum_present = get_bits1(&ctx->gb); |
426 | if (band->checksum_present) |
427 | band->checksum = get_bits(&ctx->gb, 16); |
428 | |
429 | band->glob_quant = get_bits(&ctx->gb, 5); |
430 | |
431 | /* skip unknown extension if any */ |
432 | if (band_flags & 0x20) { /* XXX: untested */ |
433 | align_get_bits(&ctx->gb); |
434 | skip_hdr_extension(&ctx->gb); |
435 | } |
436 | |
437 | align_get_bits(&ctx->gb); |
438 | |
439 | return 0; |
440 | } |
441 | |
442 | |
443 | /** |
444 | * Decode info (block type, cbp, quant delta, motion vector) |
445 | * for all macroblocks in the current tile. |
446 | * |
447 | * @param[in,out] ctx ptr to the decoder context |
448 | * @param[in,out] band ptr to the band descriptor |
449 | * @param[in,out] tile ptr to the tile descriptor |
450 | * @param[in] avctx ptr to the AVCodecContext |
451 | * @return result code: 0 = OK, -1 = error |
452 | */ |
453 | static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, |
454 | IVITile *tile, AVCodecContext *avctx) |
455 | { |
456 | int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, |
457 | mv_scale, blks_per_mb, s; |
458 | IVIMbInfo *mb, *ref_mb; |
459 | int row_offset = band->mb_size * band->pitch; |
460 | |
461 | mb = tile->mbs; |
462 | ref_mb = tile->ref_mbs; |
463 | offs = tile->ypos * band->pitch + tile->xpos; |
464 | |
465 | if (!ref_mb && |
466 | ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv)) |
467 | return AVERROR_INVALIDDATA; |
468 | |
469 | if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { |
470 | av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", |
471 | tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); |
472 | return AVERROR_INVALIDDATA; |
473 | } |
474 | |
475 | /* scale factor for motion vectors */ |
476 | mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
477 | mv_x = mv_y = 0; |
478 | |
479 | for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { |
480 | mb_offset = offs; |
481 | |
482 | for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { |
483 | mb->xpos = x; |
484 | mb->ypos = y; |
485 | mb->buf_offs = mb_offset; |
486 | |
487 | if (get_bits1(&ctx->gb)) { |
488 | if (ctx->frame_type == FRAMETYPE_INTRA) { |
489 | av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); |
490 | return AVERROR_INVALIDDATA; |
491 | } |
492 | mb->type = 1; /* empty macroblocks are always INTER */ |
493 | mb->cbp = 0; /* all blocks are empty */ |
494 | |
495 | mb->q_delta = 0; |
496 | if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { |
497 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
498 | IVI_VLC_BITS, 1); |
499 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
500 | } |
501 | |
502 | mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ |
503 | if (band->inherit_mv && ref_mb){ |
504 | /* motion vector inheritance */ |
505 | if (mv_scale) { |
506 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
507 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
508 | } else { |
509 | mb->mv_x = ref_mb->mv_x; |
510 | mb->mv_y = ref_mb->mv_y; |
511 | } |
512 | } |
513 | } else { |
514 | if (band->inherit_mv && ref_mb) { |
515 | mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ |
516 | } else if (ctx->frame_type == FRAMETYPE_INTRA) { |
517 | mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
518 | } else { |
519 | mb->type = get_bits1(&ctx->gb); |
520 | } |
521 | |
522 | blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
523 | mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
524 | |
525 | mb->q_delta = 0; |
526 | if (band->qdelta_present) { |
527 | if (band->inherit_qdelta) { |
528 | if (ref_mb) mb->q_delta = ref_mb->q_delta; |
529 | } else if (mb->cbp || (!band->plane && !band->band_num && |
530 | (ctx->frame_flags & 8))) { |
531 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
532 | IVI_VLC_BITS, 1); |
533 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
534 | } |
535 | } |
536 | |
537 | if (!mb->type) { |
538 | mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ |
539 | } else { |
540 | if (band->inherit_mv && ref_mb){ |
541 | /* motion vector inheritance */ |
542 | if (mv_scale) { |
543 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
544 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
545 | } else { |
546 | mb->mv_x = ref_mb->mv_x; |
547 | mb->mv_y = ref_mb->mv_y; |
548 | } |
549 | } else { |
550 | /* decode motion vector deltas */ |
551 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
552 | IVI_VLC_BITS, 1); |
553 | mv_y += IVI_TOSIGNED(mv_delta); |
554 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
555 | IVI_VLC_BITS, 1); |
556 | mv_x += IVI_TOSIGNED(mv_delta); |
557 | mb->mv_x = mv_x; |
558 | mb->mv_y = mv_y; |
559 | } |
560 | } |
561 | } |
562 | |
563 | s= band->is_halfpel; |
564 | if (mb->type) |
565 | if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
566 | x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
567 | + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { |
568 | av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
569 | return AVERROR_INVALIDDATA; |
570 | } |
571 | |
572 | mb++; |
573 | if (ref_mb) |
574 | ref_mb++; |
575 | mb_offset += band->mb_size; |
576 | } |
577 | |
578 | offs += row_offset; |
579 | } |
580 | |
581 | align_get_bits(&ctx->gb); |
582 | |
583 | return 0; |
584 | } |
585 | |
586 | |
587 | /** |
588 | * Switch buffers. |
589 | * |
590 | * @param[in,out] ctx ptr to the decoder context |
591 | */ |
592 | static void switch_buffers(IVI45DecContext *ctx) |
593 | { |
594 | switch (ctx->prev_frame_type) { |
595 | case FRAMETYPE_INTRA: |
596 | case FRAMETYPE_INTER: |
597 | ctx->buf_switch ^= 1; |
598 | ctx->dst_buf = ctx->buf_switch; |
599 | ctx->ref_buf = ctx->buf_switch ^ 1; |
600 | break; |
601 | case FRAMETYPE_INTER_SCAL: |
602 | if (!ctx->inter_scal) { |
603 | ctx->ref2_buf = 2; |
604 | ctx->inter_scal = 1; |
605 | } |
606 | FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); |
607 | ctx->ref_buf = ctx->ref2_buf; |
608 | break; |
609 | case FRAMETYPE_INTER_NOREF: |
610 | break; |
611 | } |
612 | |
613 | switch (ctx->frame_type) { |
614 | case FRAMETYPE_INTRA: |
615 | ctx->buf_switch = 0; |
616 | /* FALLTHROUGH */ |
617 | case FRAMETYPE_INTER: |
618 | ctx->inter_scal = 0; |
619 | ctx->dst_buf = ctx->buf_switch; |
620 | ctx->ref_buf = ctx->buf_switch ^ 1; |
621 | break; |
622 | case FRAMETYPE_INTER_SCAL: |
623 | case FRAMETYPE_INTER_NOREF: |
624 | case FRAMETYPE_NULL: |
625 | break; |
626 | } |
627 | } |
628 | |
629 | |
630 | static int is_nonnull_frame(IVI45DecContext *ctx) |
631 | { |
632 | return ctx->frame_type != FRAMETYPE_NULL; |
633 | } |
634 | |
635 | |
636 | /** |
637 | * Initialize Indeo5 decoder. |
638 | */ |
639 | static av_cold int decode_init(AVCodecContext *avctx) |
640 | { |
641 | IVI45DecContext *ctx = avctx->priv_data; |
642 | int result; |
643 | |
644 | ff_ivi_init_static_vlc(); |
645 | |
646 | /* copy rvmap tables in our context so we can apply changes to them */ |
647 | memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); |
648 | |
649 | /* set the initial picture layout according to the basic profile: |
650 | there is only one band per plane (no scalability), only one tile (no local decoding) |
651 | and picture format = YVU9 */ |
652 | ctx->pic_conf.pic_width = avctx->width; |
653 | ctx->pic_conf.pic_height = avctx->height; |
654 | ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; |
655 | ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; |
656 | ctx->pic_conf.tile_width = avctx->width; |
657 | ctx->pic_conf.tile_height = avctx->height; |
658 | ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; |
659 | |
660 | result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf, 0); |
661 | if (result) { |
662 | av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); |
663 | return AVERROR_INVALIDDATA; |
664 | } |
665 | |
666 | ctx->buf_switch = 0; |
667 | ctx->inter_scal = 0; |
668 | |
669 | ctx->decode_pic_hdr = decode_pic_hdr; |
670 | ctx->decode_band_hdr = decode_band_hdr; |
671 | ctx->decode_mb_info = decode_mb_info; |
672 | ctx->switch_buffers = switch_buffers; |
673 | ctx->is_nonnull_frame = is_nonnull_frame; |
674 | |
675 | ctx->is_indeo4 = 0; |
676 | |
677 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
678 | |
679 | return 0; |
680 | } |
681 | |
682 | AVCodec ff_indeo5_decoder = { |
683 | .name = "indeo5", |
684 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), |
685 | .type = AVMEDIA_TYPE_VIDEO, |
686 | .id = AV_CODEC_ID_INDEO5, |
687 | .priv_data_size = sizeof(IVI45DecContext), |
688 | .init = decode_init, |
689 | .close = ff_ivi_decode_close, |
690 | .decode = ff_ivi_decode_frame, |
691 | .capabilities = AV_CODEC_CAP_DR1, |
692 | }; |
693 |