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;
85 * Decode Indeo5 GOP (Group of pictures) header.
86 * This header is present in key frames only.
87 * It defines parameters for all frames in a GOP.
89 * @param[in,out] ctx ptr to the decoder context
90 * @param[in] avctx ptr to the AVCodecContext
91 * @return result code: 0 = OK, -1 = error
93 static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
95 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable;
96 int quant_mat, blk_size_changed = 0;
97 IVIBandDesc *band, *band1, *band2;
98 IVIPicConfig pic_conf;
100 ctx->gop_flags = get_bits(&ctx->gb, 8);
102 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
104 if (ctx->gop_flags & IVI5_IS_PROTECTED)
105 ctx->lock_word = get_bits_long(&ctx->gb, 32);
107 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
108 if (tile_size > 256) {
109 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
113 /* decode number of wavelet bands */
114 /* num_levels * 3 + 1 */
115 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
116 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
117 is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
118 if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
119 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
120 pic_conf.luma_bands, pic_conf.chroma_bands);
124 pic_size_indx = get_bits(&ctx->gb, 4);
125 if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
126 pic_conf.pic_height = get_bits(&ctx->gb, 13);
127 pic_conf.pic_width = get_bits(&ctx->gb, 13);
129 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
130 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
133 if (ctx->gop_flags & 2) {
134 av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
138 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
139 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
142 pic_conf.tile_height = pic_conf.pic_height;
143 pic_conf.tile_width = pic_conf.pic_width;
145 pic_conf.tile_height = pic_conf.tile_width = tile_size;
148 /* check if picture layout was changed and reallocate buffers */
149 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
150 result = ff_ivi_init_planes(ctx->planes, &pic_conf);
152 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
155 ctx->pic_conf = pic_conf;
156 ctx->is_scalable = is_scalable;
157 blk_size_changed = 1; /* force reallocation of the internal structures */
160 for (p = 0; p <= 1; p++) {
161 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
162 band = &ctx->planes[p].bands[i];
164 band->is_halfpel = get_bits1(&ctx->gb);
166 mb_size = get_bits1(&ctx->gb);
167 blk_size = 8 >> get_bits1(&ctx->gb);
168 mb_size = blk_size << !mb_size;
170 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
171 if (blk_size_changed) {
172 band->mb_size = mb_size;
173 band->blk_size = blk_size;
176 if (get_bits1(&ctx->gb)) {
177 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
181 /* select transform function and scan pattern according to plane and band number */
182 switch ((p << 2) + i) {
184 band->inv_transform = ff_ivi_inverse_slant_8x8;
185 band->dc_transform = ff_ivi_dc_slant_2d;
186 band->scan = ff_zigzag_direct;
190 band->inv_transform = ff_ivi_row_slant8;
191 band->dc_transform = ff_ivi_dc_row_slant;
192 band->scan = ff_ivi_vertical_scan_8x8;
196 band->inv_transform = ff_ivi_col_slant8;
197 band->dc_transform = ff_ivi_dc_col_slant;
198 band->scan = ff_ivi_horizontal_scan_8x8;
202 band->inv_transform = ff_ivi_put_pixels_8x8;
203 band->dc_transform = ff_ivi_put_dc_pixel_8x8;
204 band->scan = ff_ivi_horizontal_scan_8x8;
208 band->inv_transform = ff_ivi_inverse_slant_4x4;
209 band->dc_transform = ff_ivi_dc_slant_2d;
210 band->scan = ff_ivi_direct_scan_4x4;
214 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
215 band->inv_transform == ff_ivi_inverse_slant_4x4;
217 /* select dequant matrix according to plane and band number */
219 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
224 if (band->blk_size == 8) {
225 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
226 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
227 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
228 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
230 band->intra_base = ivi5_base_quant_4x4_intra;
231 band->inter_base = ivi5_base_quant_4x4_inter;
232 band->intra_scale = ivi5_scale_quant_4x4_intra;
233 band->inter_scale = ivi5_scale_quant_4x4_inter;
236 if (get_bits(&ctx->gb, 2)) {
237 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
243 /* copy chroma parameters into the 2nd chroma plane */
244 for (i = 0; i < pic_conf.chroma_bands; i++) {
245 band1 = &ctx->planes[1].bands[i];
246 band2 = &ctx->planes[2].bands[i];
248 band2->width = band1->width;
249 band2->height = band1->height;
250 band2->mb_size = band1->mb_size;
251 band2->blk_size = band1->blk_size;
252 band2->is_halfpel = band1->is_halfpel;
253 band2->intra_base = band1->intra_base;
254 band2->inter_base = band1->inter_base;
255 band2->intra_scale = band1->intra_scale;
256 band2->inter_scale = band1->inter_scale;
257 band2->scan = band1->scan;
258 band2->inv_transform = band1->inv_transform;
259 band2->dc_transform = band1->dc_transform;
260 band2->is_2d_trans = band1->is_2d_trans;
263 /* reallocate internal structures if needed */
264 if (blk_size_changed) {
265 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
266 pic_conf.tile_height);
268 av_log(avctx, AV_LOG_ERROR,
269 "Couldn't reallocate internal structures!\n");
274 if (ctx->gop_flags & 8) {
275 if (get_bits(&ctx->gb, 3)) {
276 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
280 if (get_bits1(&ctx->gb))
281 skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
284 align_get_bits(&ctx->gb);
286 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
288 /* skip GOP extension if any */
289 if (get_bits1(&ctx->gb)) {
291 i = get_bits(&ctx->gb, 16);
292 } while (i & 0x8000);
295 align_get_bits(&ctx->gb);
302 * Skip a header extension.
304 * @param[in,out] gb the GetBit context
306 static inline void skip_hdr_extension(GetBitContext *gb)
311 len = get_bits(gb, 8);
312 for (i = 0; i < len; i++) skip_bits(gb, 8);
318 * Decode Indeo5 picture header.
320 * @param[in,out] ctx ptr to the decoder context
321 * @param[in] avctx ptr to the AVCodecContext
322 * @return result code: 0 = OK, -1 = error
324 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
326 if (get_bits(&ctx->gb, 5) != 0x1F) {
327 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
331 ctx->prev_frame_type = ctx->frame_type;
332 ctx->frame_type = get_bits(&ctx->gb, 3);
333 if (ctx->frame_type >= 5) {
334 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
338 ctx->frame_num = get_bits(&ctx->gb, 8);
340 if (ctx->frame_type == FRAMETYPE_INTRA) {
341 ctx->gop_invalid = 1;
342 if (decode_gop_header(ctx, avctx))
344 ctx->gop_invalid = 0;
347 if (ctx->frame_type != FRAMETYPE_NULL) {
348 ctx->frame_flags = get_bits(&ctx->gb, 8);
350 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
352 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
354 /* skip unknown extension if any */
355 if (ctx->frame_flags & 0x20)
356 skip_hdr_extension(&ctx->gb); /* XXX: untested */
358 /* decode macroblock huffman codebook */
359 if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
362 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
365 align_get_bits(&ctx->gb);
372 * Decode Indeo5 band header.
374 * @param[in,out] ctx ptr to the decoder context
375 * @param[in,out] band ptr to the band descriptor
376 * @param[in] avctx ptr to the AVCodecContext
377 * @return result code: 0 = OK, -1 = error
379 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
380 AVCodecContext *avctx)
385 band_flags = get_bits(&ctx->gb, 8);
387 if (band_flags & 1) {
392 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
394 band->inherit_mv = band_flags & 2;
395 band->inherit_qdelta = band_flags & 8;
396 band->qdelta_present = band_flags & 4;
397 if (!band->qdelta_present) band->inherit_qdelta = 1;
399 /* decode rvmap probability corrections if any */
400 band->num_corr = 0; /* there are no corrections */
401 if (band_flags & 0x10) {
402 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
403 if (band->num_corr > 61) {
404 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
409 /* read correction pairs */
410 for (i = 0; i < band->num_corr * 2; i++)
411 band->corr[i] = get_bits(&ctx->gb, 8);
414 /* select appropriate rvmap table for this band */
415 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
417 /* decode block huffman codebook */
418 if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
421 band->checksum_present = get_bits1(&ctx->gb);
422 if (band->checksum_present)
423 band->checksum = get_bits(&ctx->gb, 16);
425 band->glob_quant = get_bits(&ctx->gb, 5);
427 /* skip unknown extension if any */
428 if (band_flags & 0x20) { /* XXX: untested */
429 align_get_bits(&ctx->gb);
430 skip_hdr_extension(&ctx->gb);
433 align_get_bits(&ctx->gb);
440 * Decode info (block type, cbp, quant delta, motion vector)
441 * for all macroblocks in the current tile.
443 * @param[in,out] ctx ptr to the decoder context
444 * @param[in,out] band ptr to the band descriptor
445 * @param[in,out] tile ptr to the tile descriptor
446 * @param[in] avctx ptr to the AVCodecContext
447 * @return result code: 0 = OK, -1 = error
449 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
450 IVITile *tile, AVCodecContext *avctx)
452 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
453 mv_scale, blks_per_mb, s;
454 IVIMbInfo *mb, *ref_mb;
455 int row_offset = band->mb_size * band->pitch;
458 ref_mb = tile->ref_mbs;
459 offs = tile->ypos * band->pitch + tile->xpos;
462 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
463 return AVERROR_INVALIDDATA;
465 /* scale factor for motion vectors */
466 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
469 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
472 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
475 mb->buf_offs = mb_offset;
477 if (get_bits1(&ctx->gb)) {
478 if (ctx->frame_type == FRAMETYPE_INTRA) {
479 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
482 mb->type = 1; /* empty macroblocks are always INTER */
483 mb->cbp = 0; /* all blocks are empty */
486 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
487 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
489 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
492 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
493 if (band->inherit_mv && ref_mb){
494 /* motion vector inheritance */
496 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
497 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
499 mb->mv_x = ref_mb->mv_x;
500 mb->mv_y = ref_mb->mv_y;
504 if (band->inherit_mv && ref_mb) {
505 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
506 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
507 mb->type = 0; /* mb_type is always INTRA for intra-frames */
509 mb->type = get_bits1(&ctx->gb);
512 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
513 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
516 if (band->qdelta_present) {
517 if (band->inherit_qdelta) {
518 if (ref_mb) mb->q_delta = ref_mb->q_delta;
519 } else if (mb->cbp || (!band->plane && !band->band_num &&
520 (ctx->frame_flags & 8))) {
521 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
523 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
528 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
530 if (band->inherit_mv && ref_mb){
531 /* motion vector inheritance */
533 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
534 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
536 mb->mv_x = ref_mb->mv_x;
537 mb->mv_y = ref_mb->mv_y;
540 /* decode motion vector deltas */
541 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
543 mv_y += IVI_TOSIGNED(mv_delta);
544 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
546 mv_x += IVI_TOSIGNED(mv_delta);
555 if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 ||
556 x + ((mb->mv_x+s)>>s) + band->mb_size - 1
557 + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) {
558 av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
559 return AVERROR_INVALIDDATA;
565 mb_offset += band->mb_size;
571 align_get_bits(&ctx->gb);
578 * Decode an Indeo5 band.
580 * @param[in,out] ctx ptr to the decoder context
581 * @param[in,out] band ptr to the band descriptor
582 * @param[in] avctx ptr to the AVCodecContext
583 * @return result code: 0 = OK, -1 = error
585 static int decode_band(IVI5DecContext *ctx, int plane_num,
586 IVIBandDesc *band, AVCodecContext *avctx)
588 int result, i, t, idx1, idx2, pos;
591 band->buf = band->bufs[ctx->dst_buf];
592 band->ref_buf = band->bufs[ctx->ref_buf];
593 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
595 result = decode_band_hdr(ctx, band, avctx);
597 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
602 if (band->is_empty) {
603 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
607 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
609 /* apply corrections to the selected rvmap table if present */
610 for (i = 0; i < band->num_corr; i++) {
611 idx1 = band->corr[i*2];
612 idx2 = band->corr[i*2+1];
613 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
614 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
617 pos = get_bits_count(&ctx->gb);
619 for (t = 0; t < band->num_tiles; t++) {
620 tile = &band->tiles[t];
622 tile->is_empty = get_bits1(&ctx->gb);
623 if (tile->is_empty) {
624 ff_ivi_process_empty_tile(avctx, band, tile,
625 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
627 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
629 result = decode_mb_info(ctx, band, tile, avctx);
633 result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
634 if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
635 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
638 pos += tile->data_size << 3; // skip to next tile
642 /* restore the selected rvmap table by applying its corrections in reverse order */
643 for (i = band->num_corr-1; i >= 0; i--) {
644 idx1 = band->corr[i*2];
645 idx2 = band->corr[i*2+1];
646 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
647 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
651 if (band->checksum_present) {
652 uint16_t chksum = ivi_calc_band_checksum(band);
653 if (chksum != band->checksum) {
654 av_log(avctx, AV_LOG_ERROR,
655 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
656 band->plane, band->band_num, band->checksum, chksum);
661 align_get_bits(&ctx->gb);
670 * @param[in,out] ctx ptr to the decoder context
672 static void switch_buffers(IVI5DecContext *ctx)
674 switch (ctx->prev_frame_type) {
675 case FRAMETYPE_INTRA:
676 case FRAMETYPE_INTER:
677 ctx->buf_switch ^= 1;
678 ctx->dst_buf = ctx->buf_switch;
679 ctx->ref_buf = ctx->buf_switch ^ 1;
681 case FRAMETYPE_INTER_SCAL:
682 if (!ctx->inter_scal) {
686 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
687 ctx->ref_buf = ctx->ref2_buf;
689 case FRAMETYPE_INTER_NOREF:
693 switch (ctx->frame_type) {
694 case FRAMETYPE_INTRA:
697 case FRAMETYPE_INTER:
699 ctx->dst_buf = ctx->buf_switch;
700 ctx->ref_buf = ctx->buf_switch ^ 1;
702 case FRAMETYPE_INTER_SCAL:
703 case FRAMETYPE_INTER_NOREF:
711 * Initialize Indeo5 decoder.
713 static av_cold int decode_init(AVCodecContext *avctx)
715 IVI5DecContext *ctx = avctx->priv_data;
718 ff_ivi_init_static_vlc();
720 /* copy rvmap tables in our context so we can apply changes to them */
721 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
723 /* set the initial picture layout according to the basic profile:
724 there is only one band per plane (no scalability), only one tile (no local decoding)
725 and picture format = YVU9 */
726 ctx->pic_conf.pic_width = avctx->width;
727 ctx->pic_conf.pic_height = avctx->height;
728 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
729 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
730 ctx->pic_conf.tile_width = avctx->width;
731 ctx->pic_conf.tile_height = avctx->height;
732 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
734 avcodec_get_frame_defaults(&ctx->frame);
736 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
738 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
745 avctx->pix_fmt = PIX_FMT_YUV410P;
752 * main decoder function
754 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
757 IVI5DecContext *ctx = avctx->priv_data;
758 const uint8_t *buf = avpkt->data;
759 int buf_size = avpkt->size;
762 init_get_bits(&ctx->gb, buf, buf_size * 8);
763 ctx->frame_data = buf;
764 ctx->frame_size = buf_size;
766 result = decode_pic_hdr(ctx, avctx);
767 if (result || ctx->gop_invalid) {
768 av_log(avctx, AV_LOG_ERROR,
769 "Error while decoding picture header: %d\n", result);
773 if (ctx->gop_flags & IVI5_IS_PROTECTED) {
774 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
782 if (ctx->frame_type != FRAMETYPE_NULL) {
783 for (p = 0; p < 3; p++) {
784 for (b = 0; b < ctx->planes[p].num_bands; b++) {
785 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
787 av_log(avctx, AV_LOG_ERROR,
788 "Error while decoding band: %d, plane: %d\n", b, p);
795 //STOP_TIMER("decode_planes"); }
797 if (ctx->frame.data[0])
798 avctx->release_buffer(avctx, &ctx->frame);
800 if( avctx->width != ctx->planes[0].width
801 || avctx->height != ctx->planes[0].height)
802 avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);
804 ctx->frame.reference = 0;
805 if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
806 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
810 if (ctx->is_scalable) {
811 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
813 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
816 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
817 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
819 *data_size = sizeof(AVFrame);
820 *(AVFrame*)data = ctx->frame;
827 * Close Indeo5 decoder and clean up its context.
829 static av_cold int decode_close(AVCodecContext *avctx)
831 IVI5DecContext *ctx = avctx->priv_data;
833 ff_ivi_free_buffers(&ctx->planes[0]);
835 if (ctx->mb_vlc.cust_tab.table)
836 ff_free_vlc(&ctx->mb_vlc.cust_tab);
838 if (ctx->frame.data[0])
839 avctx->release_buffer(avctx, &ctx->frame);
845 AVCodec ff_indeo5_decoder = {
847 .type = AVMEDIA_TYPE_VIDEO,
848 .id = CODEC_ID_INDEO5,
849 .priv_data_size = sizeof(IVI5DecContext),
851 .close = decode_close,
852 .decode = decode_frame,
853 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),