Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / indeo5.c
CommitLineData
2ba45a60
DM
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_dsp.h"
34#include "ivi_common.h"
35#include "indeo5data.h"
36
37/**
38 * Indeo5 frame types.
39 */
40enum {
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 */
59static 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 */
292static 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 */
314static 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 */
381static 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 */
453static 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 */
592static 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
630static int is_nonnull_frame(IVI45DecContext *ctx)
631{
632 return ctx->frame_type != FRAMETYPE_NULL;
633}
634
635
636/**
637 * Initialize Indeo5 decoder.
638 */
639static 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
682AVCodec 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 = CODEC_CAP_DR1,
692};