2 * Indeo Video Interactive v5 compatible decoder
3 * Copyright (c) 2009 Maxim Poliakovski
5 * This file is part of FFmpeg.
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.
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.
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
24 * Indeo Video Interactive version 5 decoder
26 * Indeo5 data is usually transported within .avi or .mov files.
27 * Known FOURCCs: 'IV50'
30 #define BITSTREAM_READER_LE
35 #include "ivi_common.h"
36 #include "indeo5data.h"
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
49 #define IVI5_PIC_SIZE_ESC 15
51 #define IVI5_IS_PROTECTED 0x20
56 RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
57 IVIPlaneDesc planes[3]; ///< color planes
58 const uint8_t *frame_data; ///< input frame data pointer
59 int buf_switch; ///< used to switch between three buffers
60 int inter_scal; ///< signals a sequence of scalable inter frames
61 int dst_buf; ///< buffer index for the currently decoded frame
62 int ref_buf; ///< inter frame reference buffer index
63 int ref2_buf; ///< temporal storage for switching buffers
64 uint32_t frame_size; ///< frame size in bytes
66 int prev_frame_type; ///< frame type of the previous frame
68 uint32_t pic_hdr_size; ///< picture header size in bytes
70 uint16_t checksum; ///< frame checksum
72 IVIHuffTab mb_vlc; ///< vlc table for decoding macroblock data
74 uint16_t gop_hdr_size;
78 IVIPicConfig pic_conf;
83 * Decode Indeo5 GOP (Group of pictures) header.
84 * This header is present in key frames only.
85 * It defines parameters for all frames in a GOP.
87 * @param[in,out] ctx ptr to the decoder context
88 * @param[in] avctx ptr to the AVCodecContext
89 * @return result code: 0 = OK, -1 = error
91 static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
93 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable;
94 int quant_mat, blk_size_changed = 0;
95 IVIBandDesc *band, *band1, *band2;
96 IVIPicConfig pic_conf;
98 ctx->gop_flags = get_bits(&ctx->gb, 8);
100 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
102 if (ctx->gop_flags & IVI5_IS_PROTECTED)
103 ctx->lock_word = get_bits_long(&ctx->gb, 32);
105 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
106 if (tile_size > 256) {
107 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
111 /* decode number of wavelet bands */
112 /* num_levels * 3 + 1 */
113 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
114 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
115 is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
116 if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
117 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
118 pic_conf.luma_bands, pic_conf.chroma_bands);
122 pic_size_indx = get_bits(&ctx->gb, 4);
123 if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
124 pic_conf.pic_height = get_bits(&ctx->gb, 13);
125 pic_conf.pic_width = get_bits(&ctx->gb, 13);
127 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
128 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
131 if (ctx->gop_flags & 2) {
132 av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
136 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
137 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
140 pic_conf.tile_height = pic_conf.pic_height;
141 pic_conf.tile_width = pic_conf.pic_width;
143 pic_conf.tile_height = pic_conf.tile_width = tile_size;
146 /* check if picture layout was changed and reallocate buffers */
147 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
148 result = ff_ivi_init_planes(ctx->planes, &pic_conf);
150 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
153 ctx->pic_conf = pic_conf;
154 ctx->is_scalable = is_scalable;
155 blk_size_changed = 1; /* force reallocation of the internal structures */
158 for (p = 0; p <= 1; p++) {
159 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
160 band = &ctx->planes[p].bands[i];
162 band->is_halfpel = get_bits1(&ctx->gb);
164 mb_size = get_bits1(&ctx->gb);
165 blk_size = 8 >> get_bits1(&ctx->gb);
166 mb_size = blk_size << !mb_size;
168 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
169 if (blk_size_changed) {
170 band->mb_size = mb_size;
171 band->blk_size = blk_size;
174 if (get_bits1(&ctx->gb)) {
175 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
179 /* select transform function and scan pattern according to plane and band number */
180 switch ((p << 2) + i) {
182 band->inv_transform = ff_ivi_inverse_slant_8x8;
183 band->dc_transform = ff_ivi_dc_slant_2d;
184 band->scan = ff_zigzag_direct;
188 band->inv_transform = ff_ivi_row_slant8;
189 band->dc_transform = ff_ivi_dc_row_slant;
190 band->scan = ff_ivi_vertical_scan_8x8;
194 band->inv_transform = ff_ivi_col_slant8;
195 band->dc_transform = ff_ivi_dc_col_slant;
196 band->scan = ff_ivi_horizontal_scan_8x8;
200 band->inv_transform = ff_ivi_put_pixels_8x8;
201 band->dc_transform = ff_ivi_put_dc_pixel_8x8;
202 band->scan = ff_ivi_horizontal_scan_8x8;
206 band->inv_transform = ff_ivi_inverse_slant_4x4;
207 band->dc_transform = ff_ivi_dc_slant_2d;
208 band->scan = ff_ivi_direct_scan_4x4;
212 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
213 band->inv_transform == ff_ivi_inverse_slant_4x4;
215 /* select dequant matrix according to plane and band number */
217 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
222 if (band->blk_size == 8) {
223 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
224 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
225 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
226 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
228 band->intra_base = ivi5_base_quant_4x4_intra;
229 band->inter_base = ivi5_base_quant_4x4_inter;
230 band->intra_scale = ivi5_scale_quant_4x4_intra;
231 band->inter_scale = ivi5_scale_quant_4x4_inter;
234 if (get_bits(&ctx->gb, 2)) {
235 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
241 /* copy chroma parameters into the 2nd chroma plane */
242 for (i = 0; i < pic_conf.chroma_bands; i++) {
243 band1 = &ctx->planes[1].bands[i];
244 band2 = &ctx->planes[2].bands[i];
246 band2->width = band1->width;
247 band2->height = band1->height;
248 band2->mb_size = band1->mb_size;
249 band2->blk_size = band1->blk_size;
250 band2->is_halfpel = band1->is_halfpel;
251 band2->intra_base = band1->intra_base;
252 band2->inter_base = band1->inter_base;
253 band2->intra_scale = band1->intra_scale;
254 band2->inter_scale = band1->inter_scale;
255 band2->scan = band1->scan;
256 band2->inv_transform = band1->inv_transform;
257 band2->dc_transform = band1->dc_transform;
258 band2->is_2d_trans = band1->is_2d_trans;
261 /* reallocate internal structures if needed */
262 if (blk_size_changed) {
263 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
264 pic_conf.tile_height);
266 av_log(avctx, AV_LOG_ERROR,
267 "Couldn't reallocate internal structures!\n");
272 if (ctx->gop_flags & 8) {
273 if (get_bits(&ctx->gb, 3)) {
274 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
278 if (get_bits1(&ctx->gb))
279 skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
282 align_get_bits(&ctx->gb);
284 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
286 /* skip GOP extension if any */
287 if (get_bits1(&ctx->gb)) {
289 i = get_bits(&ctx->gb, 16);
290 } while (i & 0x8000);
293 align_get_bits(&ctx->gb);
300 * Skip a header extension.
302 * @param[in,out] gb the GetBit context
304 static inline void skip_hdr_extension(GetBitContext *gb)
309 len = get_bits(gb, 8);
310 for (i = 0; i < len; i++) skip_bits(gb, 8);
316 * Decode Indeo5 picture header.
318 * @param[in,out] ctx ptr to the decoder context
319 * @param[in] avctx ptr to the AVCodecContext
320 * @return result code: 0 = OK, -1 = error
322 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
324 if (get_bits(&ctx->gb, 5) != 0x1F) {
325 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
329 ctx->prev_frame_type = ctx->frame_type;
330 ctx->frame_type = get_bits(&ctx->gb, 3);
331 if (ctx->frame_type >= 5) {
332 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
336 ctx->frame_num = get_bits(&ctx->gb, 8);
338 if (ctx->frame_type == FRAMETYPE_INTRA) {
339 if (decode_gop_header(ctx, avctx))
343 if (ctx->frame_type != FRAMETYPE_NULL) {
344 ctx->frame_flags = get_bits(&ctx->gb, 8);
346 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
348 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
350 /* skip unknown extension if any */
351 if (ctx->frame_flags & 0x20)
352 skip_hdr_extension(&ctx->gb); /* XXX: untested */
354 /* decode macroblock huffman codebook */
355 if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
358 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
361 align_get_bits(&ctx->gb);
368 * Decode Indeo5 band header.
370 * @param[in,out] ctx ptr to the decoder context
371 * @param[in,out] band ptr to the band descriptor
372 * @param[in] avctx ptr to the AVCodecContext
373 * @return result code: 0 = OK, -1 = error
375 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
376 AVCodecContext *avctx)
381 band_flags = get_bits(&ctx->gb, 8);
383 if (band_flags & 1) {
388 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
390 band->inherit_mv = band_flags & 2;
391 band->inherit_qdelta = band_flags & 8;
392 band->qdelta_present = band_flags & 4;
393 if (!band->qdelta_present) band->inherit_qdelta = 1;
395 /* decode rvmap probability corrections if any */
396 band->num_corr = 0; /* there are no corrections */
397 if (band_flags & 0x10) {
398 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
399 if (band->num_corr > 61) {
400 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
405 /* read correction pairs */
406 for (i = 0; i < band->num_corr * 2; i++)
407 band->corr[i] = get_bits(&ctx->gb, 8);
410 /* select appropriate rvmap table for this band */
411 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
413 /* decode block huffman codebook */
414 if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
417 band->checksum_present = get_bits1(&ctx->gb);
418 if (band->checksum_present)
419 band->checksum = get_bits(&ctx->gb, 16);
421 band->glob_quant = get_bits(&ctx->gb, 5);
423 /* skip unknown extension if any */
424 if (band_flags & 0x20) { /* XXX: untested */
425 align_get_bits(&ctx->gb);
426 skip_hdr_extension(&ctx->gb);
429 align_get_bits(&ctx->gb);
436 * Decode info (block type, cbp, quant delta, motion vector)
437 * for all macroblocks in the current tile.
439 * @param[in,out] ctx ptr to the decoder context
440 * @param[in,out] band ptr to the band descriptor
441 * @param[in,out] tile ptr to the tile descriptor
442 * @param[in] avctx ptr to the AVCodecContext
443 * @return result code: 0 = OK, -1 = error
445 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
446 IVITile *tile, AVCodecContext *avctx)
448 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
449 mv_scale, blks_per_mb;
450 IVIMbInfo *mb, *ref_mb;
451 int row_offset = band->mb_size * band->pitch;
454 ref_mb = tile->ref_mbs;
455 offs = tile->ypos * band->pitch + tile->xpos;
458 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
459 return AVERROR_INVALIDDATA;
461 /* scale factor for motion vectors */
462 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
465 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
468 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
471 mb->buf_offs = mb_offset;
473 if (get_bits1(&ctx->gb)) {
474 if (ctx->frame_type == FRAMETYPE_INTRA) {
475 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
478 mb->type = 1; /* empty macroblocks are always INTER */
479 mb->cbp = 0; /* all blocks are empty */
482 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
483 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
485 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
488 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
489 if (band->inherit_mv && ref_mb){
490 /* motion vector inheritance */
492 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
493 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
495 mb->mv_x = ref_mb->mv_x;
496 mb->mv_y = ref_mb->mv_y;
500 if (band->inherit_mv && ref_mb) {
501 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
502 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
503 mb->type = 0; /* mb_type is always INTRA for intra-frames */
505 mb->type = get_bits1(&ctx->gb);
508 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
509 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
512 if (band->qdelta_present) {
513 if (band->inherit_qdelta) {
514 if (ref_mb) mb->q_delta = ref_mb->q_delta;
515 } else if (mb->cbp || (!band->plane && !band->band_num &&
516 (ctx->frame_flags & 8))) {
517 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
519 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
524 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
526 if (band->inherit_mv && ref_mb){
527 /* motion vector inheritance */
529 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
530 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
532 mb->mv_x = ref_mb->mv_x;
533 mb->mv_y = ref_mb->mv_y;
536 /* decode motion vector deltas */
537 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
539 mv_y += IVI_TOSIGNED(mv_delta);
540 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
542 mv_x += IVI_TOSIGNED(mv_delta);
552 mb_offset += band->mb_size;
558 align_get_bits(&ctx->gb);
565 * Decode an Indeo5 band.
567 * @param[in,out] ctx ptr to the decoder context
568 * @param[in,out] band ptr to the band descriptor
569 * @param[in] avctx ptr to the AVCodecContext
570 * @return result code: 0 = OK, -1 = error
572 static int decode_band(IVI5DecContext *ctx, int plane_num,
573 IVIBandDesc *band, AVCodecContext *avctx)
575 int result, i, t, idx1, idx2, pos;
578 band->buf = band->bufs[ctx->dst_buf];
579 band->ref_buf = band->bufs[ctx->ref_buf];
580 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
582 result = decode_band_hdr(ctx, band, avctx);
584 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
589 if (band->is_empty) {
590 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
594 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
596 /* apply corrections to the selected rvmap table if present */
597 for (i = 0; i < band->num_corr; i++) {
598 idx1 = band->corr[i*2];
599 idx2 = band->corr[i*2+1];
600 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
601 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
604 pos = get_bits_count(&ctx->gb);
606 for (t = 0; t < band->num_tiles; t++) {
607 tile = &band->tiles[t];
609 tile->is_empty = get_bits1(&ctx->gb);
610 if (tile->is_empty) {
611 ff_ivi_process_empty_tile(avctx, band, tile,
612 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
614 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
616 result = decode_mb_info(ctx, band, tile, avctx);
620 result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
621 if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
622 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
625 pos += tile->data_size << 3; // skip to next tile
629 /* restore the selected rvmap table by applying its corrections in reverse order */
630 for (i = band->num_corr-1; i >= 0; i--) {
631 idx1 = band->corr[i*2];
632 idx2 = band->corr[i*2+1];
633 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
634 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
638 if (band->checksum_present) {
639 uint16_t chksum = ivi_calc_band_checksum(band);
640 if (chksum != band->checksum) {
641 av_log(avctx, AV_LOG_ERROR,
642 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
643 band->plane, band->band_num, band->checksum, chksum);
648 align_get_bits(&ctx->gb);
657 * @param[in,out] ctx ptr to the decoder context
659 static void switch_buffers(IVI5DecContext *ctx)
661 switch (ctx->prev_frame_type) {
662 case FRAMETYPE_INTRA:
663 case FRAMETYPE_INTER:
664 ctx->buf_switch ^= 1;
665 ctx->dst_buf = ctx->buf_switch;
666 ctx->ref_buf = ctx->buf_switch ^ 1;
668 case FRAMETYPE_INTER_SCAL:
669 if (!ctx->inter_scal) {
673 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
674 ctx->ref_buf = ctx->ref2_buf;
676 case FRAMETYPE_INTER_NOREF:
680 switch (ctx->frame_type) {
681 case FRAMETYPE_INTRA:
684 case FRAMETYPE_INTER:
686 ctx->dst_buf = ctx->buf_switch;
687 ctx->ref_buf = ctx->buf_switch ^ 1;
689 case FRAMETYPE_INTER_SCAL:
690 case FRAMETYPE_INTER_NOREF:
698 * Initialize Indeo5 decoder.
700 static av_cold int decode_init(AVCodecContext *avctx)
702 IVI5DecContext *ctx = avctx->priv_data;
705 ff_ivi_init_static_vlc();
707 /* copy rvmap tables in our context so we can apply changes to them */
708 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
710 /* set the initial picture layout according to the basic profile:
711 there is only one band per plane (no scalability), only one tile (no local decoding)
712 and picture format = YVU9 */
713 ctx->pic_conf.pic_width = avctx->width;
714 ctx->pic_conf.pic_height = avctx->height;
715 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
716 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
717 ctx->pic_conf.tile_width = avctx->width;
718 ctx->pic_conf.tile_height = avctx->height;
719 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
721 avcodec_get_frame_defaults(&ctx->frame);
723 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
725 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
732 avctx->pix_fmt = PIX_FMT_YUV410P;
739 * main decoder function
741 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
744 IVI5DecContext *ctx = avctx->priv_data;
745 const uint8_t *buf = avpkt->data;
746 int buf_size = avpkt->size;
749 init_get_bits(&ctx->gb, buf, buf_size * 8);
750 ctx->frame_data = buf;
751 ctx->frame_size = buf_size;
753 result = decode_pic_hdr(ctx, avctx);
755 av_log(avctx, AV_LOG_ERROR,
756 "Error while decoding picture header: %d\n", result);
760 if (ctx->gop_flags & IVI5_IS_PROTECTED) {
761 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
769 if (ctx->frame_type != FRAMETYPE_NULL) {
770 for (p = 0; p < 3; p++) {
771 for (b = 0; b < ctx->planes[p].num_bands; b++) {
772 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
774 av_log(avctx, AV_LOG_ERROR,
775 "Error while decoding band: %d, plane: %d\n", b, p);
782 //STOP_TIMER("decode_planes"); }
784 if (ctx->frame.data[0])
785 avctx->release_buffer(avctx, &ctx->frame);
787 ctx->frame.reference = 0;
788 if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
789 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
793 if (ctx->is_scalable) {
794 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
796 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
799 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
800 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
802 *data_size = sizeof(AVFrame);
803 *(AVFrame*)data = ctx->frame;
810 * Close Indeo5 decoder and clean up its context.
812 static av_cold int decode_close(AVCodecContext *avctx)
814 IVI5DecContext *ctx = avctx->priv_data;
816 ff_ivi_free_buffers(&ctx->planes[0]);
818 if (ctx->mb_vlc.cust_tab.table)
819 ff_free_vlc(&ctx->mb_vlc.cust_tab);
821 if (ctx->frame.data[0])
822 avctx->release_buffer(avctx, &ctx->frame);
828 AVCodec ff_indeo5_decoder = {
830 .type = AVMEDIA_TYPE_VIDEO,
831 .id = CODEC_ID_INDEO5,
832 .priv_data_size = sizeof(IVI5DecContext),
834 .close = decode_close,
835 .decode = decode_frame,
836 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),