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
23 * @file libavcodec/indeo5.c
24 * Indeo Video Interactive version 5 decoder
26 * Indeo5 data is usually transported within .avi or .mov files.
27 * Known FOURCCs: 'IV50'
30 #define ALT_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
62 uint32_t frame_size; ///< frame size in bytes
64 int prev_frame_type; ///< frame type of the previous frame
66 uint32_t pic_hdr_size; ///< picture header size in bytes
68 uint16_t checksum; ///< frame checksum
70 int16_t mb_huff_sel; ///< MB huffman table selector
71 IVIHuffDesc mb_huff_desc; ///< MB table descriptor associated with the selector above
72 VLC *mb_vlc; ///< ptr to the vlc table for decoding macroblock data
73 VLC mb_vlc_cust; ///< custom macroblock vlc table
75 uint16_t gop_hdr_size;
79 IVIPicConfig pic_conf;
84 * Decodes Indeo5 GOP (Group of pictures) header.
85 * This header is present in key frames only.
86 * It defines parameters for all frames in a GOP.
88 * @param ctx [in,out] ptr to the decoder context
89 * @param avctx [in] ptr to the AVCodecContext
90 * @return result code: 0 = OK, -1 = error
92 static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
94 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, 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 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
116 if (ctx->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 blk_size_changed = 1; /* force reallocation of the internal structures */
157 for (p = 0; p <= 1; p++) {
158 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
159 band = &ctx->planes[p].bands[i];
161 band->is_halfpel = get_bits1(&ctx->gb);
163 mb_size = get_bits1(&ctx->gb);
164 blk_size = 8 >> get_bits1(&ctx->gb);
165 mb_size = blk_size << !mb_size;
167 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
168 if (blk_size_changed) {
169 band->mb_size = mb_size;
170 band->blk_size = blk_size;
173 if (get_bits1(&ctx->gb)) {
174 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
178 /* select transform function and scan pattern according to plane and band number */
179 switch ((p << 2) + i) {
181 band->inv_transform = ff_ivi_inverse_slant_8x8;
182 band->dc_transform = ff_ivi_dc_slant_2d;
183 band->scan = ff_zigzag_direct;
187 band->inv_transform = ff_ivi_row_slant8;
188 band->dc_transform = ff_ivi_dc_row_slant;
189 band->scan = ivi5_scans8x8[0];
193 band->inv_transform = ff_ivi_col_slant8;
194 band->dc_transform = ff_ivi_dc_col_slant;
195 band->scan = ivi5_scans8x8[1];
199 band->inv_transform = ff_ivi_put_pixels_8x8;
200 band->dc_transform = ff_ivi_put_dc_pixel_8x8;
201 band->scan = ivi5_scans8x8[1];
205 band->inv_transform = ff_ivi_inverse_slant_4x4;
206 band->dc_transform = ff_ivi_dc_slant_2d;
207 band->scan = ivi5_scan4x4;
211 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
212 band->inv_transform == ff_ivi_inverse_slant_4x4;
214 /* select dequant matrix according to plane and band number */
216 band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
221 if (get_bits(&ctx->gb, 2)) {
222 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
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];
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->quant_mat = band1->quant_mat;
239 band2->scan = band1->scan;
240 band2->inv_transform = band1->inv_transform;
241 band2->dc_transform = band1->dc_transform;
242 band2->is_2d_trans = band1->is_2d_trans;
245 /* reallocate internal structures if needed */
246 if (blk_size_changed) {
247 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
248 pic_conf.tile_height);
250 av_log(avctx, AV_LOG_ERROR,
251 "Couldn't reallocate internal structures!\n");
256 if (ctx->gop_flags & 8) {
257 if (get_bits(&ctx->gb, 3)) {
258 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
262 if (get_bits1(&ctx->gb))
263 skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
266 align_get_bits(&ctx->gb);
268 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
270 /* skip GOP extension if any */
271 if (get_bits1(&ctx->gb)) {
273 i = get_bits(&ctx->gb, 16);
274 } while (i & 0x8000);
277 align_get_bits(&ctx->gb);
284 * Skips a header extension.
286 * @param gb [in,out] the GetBit context
288 static inline void skip_hdr_extension(GetBitContext *gb)
293 len = get_bits(gb, 8);
294 for (i = 0; i < len; i++) skip_bits(gb, 8);
300 * Decodes Indeo5 picture header.
302 * @param ctx [in,out] ptr to the decoder context
303 * @param avctx [in] ptr to the AVCodecContext
304 * @return result code: 0 = OK, -1 = error
306 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
309 IVIHuffDesc new_huff;
311 if (get_bits(&ctx->gb, 5) != 0x1F) {
312 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
316 ctx->prev_frame_type = ctx->frame_type;
317 ctx->frame_type = get_bits(&ctx->gb, 3);
318 if (ctx->frame_type >= 5) {
319 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
323 ctx->frame_num = get_bits(&ctx->gb, 8);
325 if (ctx->frame_type == FRAMETYPE_INTRA) {
326 if (decode_gop_header(ctx, avctx))
330 if (ctx->frame_type != FRAMETYPE_NULL) {
331 ctx->frame_flags = get_bits(&ctx->gb, 8);
333 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
335 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
337 /* skip unknown extension if any */
338 if (ctx->frame_flags & 0x20)
339 skip_hdr_extension(&ctx->gb); /* XXX: untested */
341 /* decode macroblock huffman codebook */
342 if (ctx->frame_flags & 0x40) {
343 ctx->mb_huff_sel = ff_ivi_dec_huff_desc(&ctx->gb, &new_huff);
344 if (ctx->mb_huff_sel != 7) {
345 ctx->mb_vlc = &ff_ivi_mb_vlc_tabs[ctx->mb_huff_sel];
347 if (ff_ivi_huff_desc_cmp(&new_huff, &ctx->mb_huff_desc)) {
348 ff_ivi_huff_desc_copy(&ctx->mb_huff_desc, &new_huff);
350 if (ctx->mb_vlc_cust.table)
351 free_vlc(&ctx->mb_vlc_cust);
352 result = ff_ivi_create_huff_from_desc(&ctx->mb_huff_desc,
353 &ctx->mb_vlc_cust, 0);
355 av_log(avctx, AV_LOG_ERROR, "Error while initializing custom macroblock vlc table!\n");
359 ctx->mb_vlc = &ctx->mb_vlc_cust;
362 ctx->mb_vlc = &ff_ivi_mb_vlc_tabs[7]; /* select the default macroblock huffman table */
365 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
368 align_get_bits(&ctx->gb);
375 * Decodes Indeo5 band header.
377 * @param ctx [in,out] ptr to the decoder context
378 * @param band [in,out] ptr to the band descriptor
379 * @param avctx [in] ptr to the AVCodecContext
380 * @return result code: 0 = OK, -1 = error
382 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
383 AVCodecContext *avctx)
387 IVIHuffDesc new_huff;
389 band_flags = get_bits(&ctx->gb, 8);
391 if (band_flags & 1) {
396 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
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;
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",
413 /* read correction pairs */
414 for (i = 0; i < band->num_corr * 2; i++)
415 band->corr[i] = get_bits(&ctx->gb, 8);
418 /* select appropriate rvmap table for this band */
419 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
421 /* decode block huffman codebook */
422 if (band_flags & 0x80) {
423 band->huff_sel = ff_ivi_dec_huff_desc(&ctx->gb, &new_huff);
424 if (band->huff_sel != 7) {
425 band->blk_vlc = &ff_ivi_blk_vlc_tabs[band->huff_sel];
427 if (ff_ivi_huff_desc_cmp(&new_huff, &band->huff_desc)) {
428 ff_ivi_huff_desc_copy(&band->huff_desc, &new_huff);
430 if (band->blk_vlc_cust.table)
431 free_vlc(&band->blk_vlc_cust);
432 result = ff_ivi_create_huff_from_desc(&band->huff_desc,
433 &band->blk_vlc_cust, 0);
435 av_log(avctx, AV_LOG_ERROR, "Error while initializing custom block vlc table!\n");
439 band->blk_vlc = &band->blk_vlc_cust;
442 band->blk_vlc = &ff_ivi_blk_vlc_tabs[7]; /* select the default macroblock huffman table */
445 band->checksum_present = get_bits1(&ctx->gb);
446 if (band->checksum_present)
447 band->checksum = get_bits(&ctx->gb, 16);
449 band->glob_quant = get_bits(&ctx->gb, 5);
451 /* skip unknown extension if any */
452 if (band_flags & 0x20) { /* XXX: untested */
453 align_get_bits(&ctx->gb);
454 skip_hdr_extension(&ctx->gb);
457 align_get_bits(&ctx->gb);
464 * Decodes info (block type, cbp, quant delta, motion vector)
465 * for all macroblocks in the current tile.
467 * @param ctx [in,out] ptr to the decoder context
468 * @param band [in,out] ptr to the band descriptor
469 * @param tile [in,out] ptr to the tile descriptor
470 * @param avctx [in] ptr to the AVCodecContext
471 * @return result code: 0 = OK, -1 = error
473 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
474 IVITile *tile, AVCodecContext *avctx)
476 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
477 mv_scale, blks_per_mb;
478 IVIMbInfo *mb, *ref_mb;
479 int row_offset = band->mb_size * band->pitch;
482 ref_mb = tile->ref_mbs;
483 offs = tile->ypos * band->pitch + tile->xpos;
485 /* scale factor for motion vectors */
486 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
489 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
492 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
495 mb->buf_offs = mb_offset;
497 if (get_bits1(&ctx->gb)) {
498 if (ctx->frame_type == FRAMETYPE_INTRA) {
499 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
502 mb->type = 1; /* empty macroblocks are always INTER */
503 mb->cbp = 0; /* all blocks are empty */
506 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
507 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc->table,
509 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
512 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
513 if (band->inherit_mv){
514 /* motion vector inheritance */
516 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
517 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
519 mb->mv_x = ref_mb->mv_x;
520 mb->mv_y = ref_mb->mv_y;
524 if (band->inherit_mv) {
525 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
526 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
527 mb->type = 0; /* mb_type is always INTRA for intra-frames */
529 mb->type = get_bits1(&ctx->gb);
532 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
533 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
536 if (band->qdelta_present) {
537 if (band->inherit_qdelta) {
538 if (ref_mb) mb->q_delta = ref_mb->q_delta;
539 } else if (mb->cbp || (!band->plane && !band->band_num &&
540 (ctx->frame_flags & 8))) {
541 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc->table,
543 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
548 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
550 if (band->inherit_mv){
551 /* motion vector inheritance */
553 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
554 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
556 mb->mv_x = ref_mb->mv_x;
557 mb->mv_y = ref_mb->mv_y;
560 /* decode motion vector deltas */
561 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc->table,
563 mv_y += IVI_TOSIGNED(mv_delta);
564 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc->table,
566 mv_x += IVI_TOSIGNED(mv_delta);
576 mb_offset += band->mb_size;
582 align_get_bits(&ctx->gb);
589 * Decodes an Indeo5 band.
591 * @param ctx [in,out] ptr to the decoder context
592 * @param band [in,out] ptr to the band descriptor
593 * @param avctx [in] ptr to the AVCodecContext
594 * @return result code: 0 = OK, -1 = error
596 static int decode_band(IVI5DecContext *ctx, int plane_num,
597 IVIBandDesc *band, AVCodecContext *avctx)
599 int result, i, t, idx1, idx2;
602 band->buf = band->bufs[ctx->dst_buf];
603 band->ref_buf = band->bufs[ctx->ref_buf];
604 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
606 result = decode_band_hdr(ctx, band, avctx);
608 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
613 if (band->is_empty) {
614 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
618 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
620 /* apply corrections to the selected rvmap table if present */
621 for (i = 0; i < band->num_corr; i++) {
622 idx1 = band->corr[i*2];
623 idx2 = band->corr[i*2+1];
624 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
625 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
628 for (t = 0; t < band->num_tiles; t++) {
629 tile = &band->tiles[t];
631 tile->is_empty = get_bits1(&ctx->gb);
632 if (tile->is_empty) {
633 ff_ivi_process_empty_tile(avctx, band, tile,
634 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
635 align_get_bits(&ctx->gb);
637 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
639 result = decode_mb_info(ctx, band, tile, avctx);
643 if (band->blk_size == 8) {
644 band->intra_base = &ivi5_base_quant_8x8_intra[band->quant_mat][0];
645 band->inter_base = &ivi5_base_quant_8x8_inter[band->quant_mat][0];
646 band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0];
647 band->inter_scale = &ivi5_scale_quant_8x8_inter[band->quant_mat][0];
649 band->intra_base = ivi5_base_quant_4x4_intra;
650 band->inter_base = ivi5_base_quant_4x4_inter;
651 band->intra_scale = ivi5_scale_quant_4x4_intra;
652 band->inter_scale = ivi5_scale_quant_4x4_inter;
655 result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
657 av_log(avctx, AV_LOG_ERROR, "Corrupted blocks data encountered!\n");
663 /* restore the selected rvmap table by applying its corrections in reverse order */
664 for (i = band->num_corr-1; i >= 0; i--) {
665 idx1 = band->corr[i*2];
666 idx2 = band->corr[i*2+1];
667 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
668 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
672 if (band->checksum_present) {
673 uint16_t chksum = ivi_calc_band_checksum(band);
674 if (chksum != band->checksum) {
675 av_log(avctx, AV_LOG_ERROR,
676 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
677 band->plane, band->band_num, band->checksum, chksum);
689 * @param ctx [in,out] ptr to the decoder context
690 * @param avctx [in] ptr to the AVCodecContext
692 static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx)
694 switch (ctx->frame_type) {
695 case FRAMETYPE_INTRA:
700 case FRAMETYPE_INTER:
701 ctx->buf_switch &= 1;
702 /* swap buffers only if there were no droppable frames */
703 if (ctx->prev_frame_type != FRAMETYPE_INTER_NOREF &&
704 ctx->prev_frame_type != FRAMETYPE_INTER_SCAL)
705 ctx->buf_switch ^= 1;
706 ctx->dst_buf = ctx->buf_switch;
707 ctx->ref_buf = ctx->buf_switch ^ 1;
709 case FRAMETYPE_INTER_SCAL:
710 if (ctx->prev_frame_type == FRAMETYPE_INTER_NOREF)
712 if (ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) {
713 ctx->buf_switch ^= 1;
714 ctx->dst_buf = ctx->buf_switch;
715 ctx->ref_buf = ctx->buf_switch ^ 1;
717 ctx->buf_switch ^= 2;
719 ctx->ref_buf = ctx->buf_switch & 1;
720 if (!(ctx->buf_switch & 2))
721 FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
724 case FRAMETYPE_INTER_NOREF:
725 if (ctx->prev_frame_type == FRAMETYPE_INTER_SCAL) {
726 ctx->buf_switch ^= 2;
728 ctx->ref_buf = ctx->buf_switch & 1;
729 if (!(ctx->buf_switch & 2))
730 FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
732 ctx->buf_switch ^= 1;
733 ctx->dst_buf = ctx->buf_switch & 1;
734 ctx->ref_buf = (ctx->buf_switch & 1) ^ 1;
740 av_log(avctx, AV_LOG_ERROR, "unsupported frame type: %d\n", ctx->frame_type);
746 * Initializes Indeo5 decoder.
748 static av_cold int decode_init(AVCodecContext *avctx)
750 IVI5DecContext *ctx = avctx->priv_data;
753 ff_ivi_init_static_vlc();
755 /* copy rvmap tables in our context so we can apply changes to them */
756 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
758 /* set the initial picture layout according to the basic profile:
759 there is only one band per plane (no scalability), only one tile (no local decoding)
760 and picture format = YVU9 */
761 ctx->pic_conf.pic_width = avctx->width;
762 ctx->pic_conf.pic_height = avctx->height;
763 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
764 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
765 ctx->pic_conf.tile_width = avctx->width;
766 ctx->pic_conf.tile_height = avctx->height;
767 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
769 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
771 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
775 avctx->pix_fmt = PIX_FMT_YUV410P;
782 * main decoder function
784 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
787 IVI5DecContext *ctx = avctx->priv_data;
788 const uint8_t *buf = avpkt->data;
789 int buf_size = avpkt->size;
792 init_get_bits(&ctx->gb, buf, buf_size * 8);
793 ctx->frame_data = buf;
794 ctx->frame_size = buf_size;
796 result = decode_pic_hdr(ctx, avctx);
798 av_log(avctx, AV_LOG_ERROR,
799 "Error while decoding picture header: %d\n", result);
803 if (ctx->gop_flags & IVI5_IS_PROTECTED) {
804 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
808 switch_buffers(ctx, avctx);
812 if (ctx->frame_type == FRAMETYPE_NULL) {
813 ctx->frame_type = ctx->prev_frame_type;
815 for (p = 0; p < 3; p++) {
816 for (b = 0; b < ctx->planes[p].num_bands; b++) {
817 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
819 av_log(avctx, AV_LOG_ERROR,
820 "Error while decoding band: %d, plane: %d\n", b, p);
827 //STOP_TIMER("decode_planes");
829 if (ctx->frame.data[0])
830 avctx->release_buffer(avctx, &ctx->frame);
832 ctx->frame.reference = 0;
833 if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
834 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
838 if (ctx->is_scalable) {
839 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
841 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
844 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
845 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
847 *data_size = sizeof(AVFrame);
848 *(AVFrame*)data = ctx->frame;
855 * Closes Indeo5 decoder and cleans up its context.
857 static av_cold int decode_close(AVCodecContext *avctx)
859 IVI5DecContext *ctx = avctx->priv_data;
861 ff_ivi_free_buffers(&ctx->planes[0]);
863 if (ctx->frame.data[0])
864 avctx->release_buffer(avctx, &ctx->frame);
870 AVCodec indeo5_decoder = {
872 .type = CODEC_TYPE_VIDEO,
873 .id = CODEC_ID_INDEO5,
874 .priv_data_size = sizeof(IVI5DecContext),
876 .close = decode_close,
877 .decode = decode_frame,
878 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),