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 */
decode_gop_header(IVI45DecContext * ctx,AVCodecContext * avctx)60 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 int quant_mat, blk_size_changed = 0;
64 IVIBandDesc *band, *band1, *band2;
65 IVIPicConfig pic_conf;
66
67 ctx->gop_flags = get_bits(&ctx->gb, 8);
68
69 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
70
71 if (ctx->gop_flags & IVI5_IS_PROTECTED)
72 ctx->lock_word = get_bits_long(&ctx->gb, 32);
73
74 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
75 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 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
83 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
84 is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
85 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 pic_size_indx = get_bits(&ctx->gb, 4);
92 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 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
97 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
98 }
99
100 if (ctx->gop_flags & 2) {
101 avpriv_report_missing_feature(avctx, "YV12 picture format");
102 return AVERROR_PATCHWELCOME;
103 }
104
105 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
106 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
107
108 if (!tile_size) {
109 pic_conf.tile_height = pic_conf.pic_height;
110 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 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) {
117 result = ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 0);
118 if (result < 0) {
119 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
120 return result;
121 }
122 ctx->pic_conf = pic_conf;
123 ctx->is_scalable = is_scalable;
124 blk_size_changed = 1; /* force reallocation of the internal structures */
125 }
126
127 for (p = 0; p <= 1; p++) {
128 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
129 band = &ctx->planes[p].bands[i];
130
131 band->is_halfpel = get_bits1(&ctx->gb);
132
133 mb_size = get_bits1(&ctx->gb);
134 blk_size = 8 >> get_bits1(&ctx->gb);
135 mb_size = blk_size << !mb_size;
136
137 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 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
143 if (blk_size_changed) {
144 band->mb_size = mb_size;
145 band->blk_size = blk_size;
146 }
147
148 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 switch ((p << 2) + i) {
155 case 0:
156 band->inv_transform = ff_ivi_inverse_slant_8x8;
157 band->dc_transform = ff_ivi_dc_slant_2d;
158 band->scan = ff_zigzag_direct;
159 band->transform_size = 8;
160 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 case 4:
184 band->inv_transform = ff_ivi_inverse_slant_4x4;
185 band->dc_transform = ff_ivi_dc_slant_2d;
186 band->scan = ff_ivi_direct_scan_4x4;
187 band->transform_size = 4;
188 break;
189 }
190
191 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
192 band->inv_transform == ff_ivi_inverse_slant_4x4;
193
194 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 if (!p) {
201 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
202 } else {
203 quant_mat = 5;
204 }
205
206 if (band->blk_size == 8) {
207 if(quant_mat >= 5){
208 av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
209 return -1;
210 }
211 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
212 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
213 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
214 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
215 } else {
216 band->intra_base = ivi5_base_quant_4x4_intra;
217 band->inter_base = ivi5_base_quant_4x4_inter;
218 band->intra_scale = ivi5_scale_quant_4x4_intra;
219 band->inter_scale = ivi5_scale_quant_4x4_inter;
220 }
221
222 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 for (i = 0; i < pic_conf.chroma_bands; i++) {
231 band1 = &ctx->planes[1].bands[i];
232 band2 = &ctx->planes[2].bands[i];
233
234 band2->width = band1->width;
235 band2->height = band1->height;
236 band2->mb_size = band1->mb_size;
237 band2->blk_size = band1->blk_size;
238 band2->is_halfpel = band1->is_halfpel;
239 band2->intra_base = band1->intra_base;
240 band2->inter_base = band1->inter_base;
241 band2->intra_scale = band1->intra_scale;
242 band2->inter_scale = band1->inter_scale;
243 band2->scan = band1->scan;
244 band2->inv_transform = band1->inv_transform;
245 band2->dc_transform = band1->dc_transform;
246 band2->is_2d_trans = band1->is_2d_trans;
247 band2->transform_size= band1->transform_size;
248 }
249
250 /* reallocate internal structures if needed */
251 if (blk_size_changed) {
252 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
253 pic_conf.tile_height);
254 if (result < 0) {
255 av_log(avctx, AV_LOG_ERROR,
256 "Couldn't reallocate internal structures!\n");
257 return result;
258 }
259 }
260
261 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 align_get_bits(&ctx->gb);
272
273 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
274
275 /* skip GOP extension if any */
276 if (get_bits1(&ctx->gb)) {
277 do {
278 i = get_bits(&ctx->gb, 16);
279 } while (i & 0x8000);
280 }
281
282 align_get_bits(&ctx->gb);
283
284 return 0;
285 }
286
287
288 /**
289 * Skip a header extension.
290 *
291 * @param[in,out] gb the GetBit context
292 */
skip_hdr_extension(GetBitContext * gb)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 */
decode_pic_hdr(IVI45DecContext * ctx,AVCodecContext * avctx)315 static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
316 {
317 int ret;
318
319 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 ctx->prev_frame_type = ctx->frame_type;
325 ctx->frame_type = get_bits(&ctx->gb, 3);
326 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 ctx->frame_num = get_bits(&ctx->gb, 8);
333
334 if (ctx->frame_type == FRAMETYPE_INTRA) {
335 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 ctx->gop_invalid = 0;
341 }
342
343 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 if (ctx->frame_type != FRAMETYPE_NULL) {
350 ctx->frame_flags = get_bits(&ctx->gb, 8);
351
352 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits(&ctx->gb, 24) : 0;
353
354 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
355
356 /* skip unknown extension if any */
357 if (ctx->frame_flags & 0x20)
358 skip_hdr_extension(&ctx->gb); /* XXX: untested */
359
360 /* decode macroblock huffman codebook */
361 ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
362 IVI_MB_HUFF, &ctx->mb_vlc, avctx);
363 if (ret < 0)
364 return ret;
365
366 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
367 }
368
369 align_get_bits(&ctx->gb);
370
371 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 */
decode_band_hdr(IVI45DecContext * ctx,IVIBandDesc * band,AVCodecContext * avctx)383 static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
384 AVCodecContext *avctx)
385 {
386 int i, ret;
387 uint8_t band_flags;
388
389 band_flags = get_bits(&ctx->gb, 8);
390
391 if (band_flags & 1) {
392 band->is_empty = 1;
393 return 0;
394 }
395
396 band->data_size = (ctx->frame_flags & 0x80) ? get_bits(&ctx->gb, 24) : 0;
397
398 band->inherit_mv = band_flags & 2;
399 band->inherit_qdelta = band_flags & 8;
400 band->qdelta_present = band_flags & 4;
401 if (!band->qdelta_present) band->inherit_qdelta = 1;
402
403 /* decode rvmap probability corrections if any */
404 band->num_corr = 0; /* there are no corrections */
405 if (band_flags & 0x10) {
406 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
407 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 for (i = 0; i < band->num_corr * 2; i++)
415 band->corr[i] = get_bits(&ctx->gb, 8);
416 }
417
418 /* select appropriate rvmap table for this band */
419 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
420
421 /* decode block huffman codebook */
422 ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
423 &band->blk_vlc, avctx);
424 if (ret < 0)
425 return ret;
426
427 band->checksum_present = get_bits1(&ctx->gb);
428 if (band->checksum_present)
429 band->checksum = get_bits(&ctx->gb, 16);
430
431 band->glob_quant = get_bits(&ctx->gb, 5);
432
433 /* skip unknown extension if any */
434 if (band_flags & 0x20) { /* XXX: untested */
435 align_get_bits(&ctx->gb);
436 skip_hdr_extension(&ctx->gb);
437 }
438
439 align_get_bits(&ctx->gb);
440
441 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 */
decode_mb_info(IVI45DecContext * ctx,IVIBandDesc * band,IVITile * tile,AVCodecContext * avctx)455 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 int row_offset = band->mb_size * band->pitch;
462
463 mb = tile->mbs;
464 ref_mb = tile->ref_mbs;
465 offs = tile->ypos * band->pitch + tile->xpos;
466
467 if (!ref_mb &&
468 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
469 return AVERROR_INVALIDDATA;
470
471 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 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
479 mv_x = mv_y = 0;
480
481 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
482 mb_offset = offs;
483
484 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
485 mb->xpos = x;
486 mb->ypos = y;
487 mb->buf_offs = mb_offset;
488
489 if (get_bits1(&ctx->gb)) {
490 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 mb->type = 1; /* empty macroblocks are always INTER */
495 mb->cbp = 0; /* all blocks are empty */
496
497 mb->q_delta = 0;
498 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 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
505 if (band->inherit_mv && ref_mb){
506 /* motion vector inheritance */
507 if (mv_scale) {
508 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
509 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 if (band->inherit_mv && ref_mb) {
517 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
518 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
519 mb->type = 0; /* mb_type is always INTRA for intra-frames */
520 } else {
521 mb->type = get_bits1(&ctx->gb);
522 }
523
524 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
525 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
526
527 mb->q_delta = 0;
528 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 if (!mb->type) {
540 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
541 } else {
542 if (band->inherit_mv && ref_mb){
543 /* motion vector inheritance */
544 if (mv_scale) {
545 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
546 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 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
554 IVI_VLC_BITS, 1);
555 mv_y += IVI_TOSIGNED(mv_delta);
556 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
557 IVI_VLC_BITS, 1);
558 mv_x += IVI_TOSIGNED(mv_delta);
559 mb->mv_x = mv_x;
560 mb->mv_y = mv_y;
561 }
562 }
563 }
564
565 s= band->is_halfpel;
566 if (mb->type)
567 if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 ||
568 x + ((mb->mv_x+s)>>s) + band->mb_size - 1
569 + (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 mb++;
575 if (ref_mb)
576 ref_mb++;
577 mb_offset += band->mb_size;
578 }
579
580 offs += row_offset;
581 }
582
583 align_get_bits(&ctx->gb);
584
585 return 0;
586 }
587
588
589 /**
590 * Switch buffers.
591 *
592 * @param[in,out] ctx ptr to the decoder context
593 */
switch_buffers(IVI45DecContext * ctx)594 static void switch_buffers(IVI45DecContext *ctx)
595 {
596 switch (ctx->prev_frame_type) {
597 case FRAMETYPE_INTRA:
598 case FRAMETYPE_INTER:
599 ctx->buf_switch ^= 1;
600 ctx->dst_buf = ctx->buf_switch;
601 ctx->ref_buf = ctx->buf_switch ^ 1;
602 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 switch (ctx->frame_type) {
616 case FRAMETYPE_INTRA:
617 ctx->buf_switch = 0;
618 /* FALLTHROUGH */
619 case FRAMETYPE_INTER:
620 ctx->inter_scal = 0;
621 ctx->dst_buf = ctx->buf_switch;
622 ctx->ref_buf = ctx->buf_switch ^ 1;
623 break;
624 case FRAMETYPE_INTER_SCAL:
625 case FRAMETYPE_INTER_NOREF:
626 case FRAMETYPE_NULL:
627 break;
628 }
629 }
630
631
is_nonnull_frame(IVI45DecContext * ctx)632 static int is_nonnull_frame(IVI45DecContext *ctx)
633 {
634 return ctx->frame_type != FRAMETYPE_NULL;
635 }
636
637
638 /**
639 * Initialize Indeo5 decoder.
640 */
decode_init(AVCodecContext * avctx)641 static av_cold int decode_init(AVCodecContext *avctx)
642 {
643 IVI45DecContext *ctx = avctx->priv_data;
644 int result;
645
646 ctx->gop_invalid = 1;
647
648 ff_ivi_init_static_vlc();
649
650 /* copy rvmap tables in our context so we can apply changes to them */
651 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 ctx->pic_conf.pic_width = avctx->width;
657 ctx->pic_conf.pic_height = avctx->height;
658 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
659 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
660 ctx->pic_conf.tile_width = avctx->width;
661 ctx->pic_conf.tile_height = avctx->height;
662 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
663
664 result = ff_ivi_init_planes(avctx, ctx->planes, &ctx->pic_conf, 0);
665 if (result) {
666 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
667 return AVERROR_INVALIDDATA;
668 }
669
670 ctx->buf_switch = 0;
671 ctx->inter_scal = 0;
672
673 ctx->decode_pic_hdr = decode_pic_hdr;
674 ctx->decode_band_hdr = decode_band_hdr;
675 ctx->decode_mb_info = decode_mb_info;
676 ctx->switch_buffers = switch_buffers;
677 ctx->is_nonnull_frame = is_nonnull_frame;
678
679 ctx->is_indeo4 = 0;
680
681 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
682
683 return 0;
684 }
685
686 const FFCodec ff_indeo5_decoder = {
687 .p.name = "indeo5",
688 .p.long_name = NULL_IF_CONFIG_SMALL("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_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
697 };
698