Libav 0.7.1
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00001 /* 00002 * Indeo Video Interactive v5 compatible decoder 00003 * Copyright (c) 2009 Maxim Poliakovski 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00030 #define ALT_BITSTREAM_READER_LE 00031 #include "avcodec.h" 00032 #include "get_bits.h" 00033 #include "dsputil.h" 00034 #include "ivi_dsp.h" 00035 #include "ivi_common.h" 00036 #include "indeo5data.h" 00037 00041 enum { 00042 FRAMETYPE_INTRA = 0, 00043 FRAMETYPE_INTER = 1, 00044 FRAMETYPE_INTER_SCAL = 2, 00045 FRAMETYPE_INTER_NOREF = 3, 00046 FRAMETYPE_NULL = 4 00047 }; 00048 00049 #define IVI5_PIC_SIZE_ESC 15 00050 00051 #define IVI5_IS_PROTECTED 0x20 00052 00053 typedef struct { 00054 GetBitContext gb; 00055 AVFrame frame; 00056 RVMapDesc rvmap_tabs[9]; 00057 IVIPlaneDesc planes[3]; 00058 const uint8_t *frame_data; 00059 int buf_switch; 00060 int inter_scal; 00061 int dst_buf; 00062 int ref_buf; 00063 int ref2_buf; 00064 uint32_t frame_size; 00065 int frame_type; 00066 int prev_frame_type; 00067 int frame_num; 00068 uint32_t pic_hdr_size; 00069 uint8_t frame_flags; 00070 uint16_t checksum; 00071 00072 IVIHuffTab mb_vlc; 00073 00074 uint16_t gop_hdr_size; 00075 uint8_t gop_flags; 00076 int is_scalable; 00077 uint32_t lock_word; 00078 IVIPicConfig pic_conf; 00079 00080 int gop_invalid; 00081 } IVI5DecContext; 00082 00083 00093 static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx) 00094 { 00095 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size; 00096 int quant_mat, blk_size_changed = 0; 00097 IVIBandDesc *band, *band1, *band2; 00098 IVIPicConfig pic_conf; 00099 00100 ctx->gop_flags = get_bits(&ctx->gb, 8); 00101 00102 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; 00103 00104 if (ctx->gop_flags & IVI5_IS_PROTECTED) 00105 ctx->lock_word = get_bits_long(&ctx->gb, 32); 00106 00107 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; 00108 if (tile_size > 256) { 00109 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); 00110 return -1; 00111 } 00112 00113 /* decode number of wavelet bands */ 00114 /* num_levels * 3 + 1 */ 00115 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; 00116 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; 00117 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; 00118 if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { 00119 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", 00120 pic_conf.luma_bands, pic_conf.chroma_bands); 00121 return -1; 00122 } 00123 00124 pic_size_indx = get_bits(&ctx->gb, 4); 00125 if (pic_size_indx == IVI5_PIC_SIZE_ESC) { 00126 pic_conf.pic_height = get_bits(&ctx->gb, 13); 00127 pic_conf.pic_width = get_bits(&ctx->gb, 13); 00128 } else { 00129 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; 00130 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; 00131 } 00132 00133 if (ctx->gop_flags & 2) { 00134 av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n"); 00135 return -1; 00136 } 00137 00138 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; 00139 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; 00140 00141 if (!tile_size) { 00142 pic_conf.tile_height = pic_conf.pic_height; 00143 pic_conf.tile_width = pic_conf.pic_width; 00144 } else { 00145 pic_conf.tile_height = pic_conf.tile_width = tile_size; 00146 } 00147 00148 /* check if picture layout was changed and reallocate buffers */ 00149 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { 00150 result = ff_ivi_init_planes(ctx->planes, &pic_conf); 00151 if (result) { 00152 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); 00153 return -1; 00154 } 00155 ctx->pic_conf = pic_conf; 00156 blk_size_changed = 1; /* force reallocation of the internal structures */ 00157 } 00158 00159 for (p = 0; p <= 1; p++) { 00160 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { 00161 band = &ctx->planes[p].bands[i]; 00162 00163 band->is_halfpel = get_bits1(&ctx->gb); 00164 00165 mb_size = get_bits1(&ctx->gb); 00166 blk_size = 8 >> get_bits1(&ctx->gb); 00167 mb_size = blk_size << !mb_size; 00168 00169 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; 00170 if (blk_size_changed) { 00171 band->mb_size = mb_size; 00172 band->blk_size = blk_size; 00173 } 00174 00175 if (get_bits1(&ctx->gb)) { 00176 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n"); 00177 return -1; 00178 } 00179 00180 /* select transform function and scan pattern according to plane and band number */ 00181 switch ((p << 2) + i) { 00182 case 0: 00183 band->inv_transform = ff_ivi_inverse_slant_8x8; 00184 band->dc_transform = ff_ivi_dc_slant_2d; 00185 band->scan = ff_zigzag_direct; 00186 break; 00187 00188 case 1: 00189 band->inv_transform = ff_ivi_row_slant8; 00190 band->dc_transform = ff_ivi_dc_row_slant; 00191 band->scan = ff_ivi_vertical_scan_8x8; 00192 break; 00193 00194 case 2: 00195 band->inv_transform = ff_ivi_col_slant8; 00196 band->dc_transform = ff_ivi_dc_col_slant; 00197 band->scan = ff_ivi_horizontal_scan_8x8; 00198 break; 00199 00200 case 3: 00201 band->inv_transform = ff_ivi_put_pixels_8x8; 00202 band->dc_transform = ff_ivi_put_dc_pixel_8x8; 00203 band->scan = ff_ivi_horizontal_scan_8x8; 00204 break; 00205 00206 case 4: 00207 band->inv_transform = ff_ivi_inverse_slant_4x4; 00208 band->dc_transform = ff_ivi_dc_slant_2d; 00209 band->scan = ff_ivi_direct_scan_4x4; 00210 break; 00211 } 00212 00213 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || 00214 band->inv_transform == ff_ivi_inverse_slant_4x4; 00215 00216 /* select dequant matrix according to plane and band number */ 00217 if (!p) { 00218 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; 00219 } else { 00220 quant_mat = 5; 00221 } 00222 00223 if (band->blk_size == 8) { 00224 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; 00225 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; 00226 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; 00227 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; 00228 } else { 00229 band->intra_base = ivi5_base_quant_4x4_intra; 00230 band->inter_base = ivi5_base_quant_4x4_inter; 00231 band->intra_scale = ivi5_scale_quant_4x4_intra; 00232 band->inter_scale = ivi5_scale_quant_4x4_inter; 00233 } 00234 00235 if (get_bits(&ctx->gb, 2)) { 00236 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); 00237 return -1; 00238 } 00239 } 00240 } 00241 00242 /* copy chroma parameters into the 2nd chroma plane */ 00243 for (i = 0; i < pic_conf.chroma_bands; i++) { 00244 band1 = &ctx->planes[1].bands[i]; 00245 band2 = &ctx->planes[2].bands[i]; 00246 00247 band2->width = band1->width; 00248 band2->height = band1->height; 00249 band2->mb_size = band1->mb_size; 00250 band2->blk_size = band1->blk_size; 00251 band2->is_halfpel = band1->is_halfpel; 00252 band2->intra_base = band1->intra_base; 00253 band2->inter_base = band1->inter_base; 00254 band2->intra_scale = band1->intra_scale; 00255 band2->inter_scale = band1->inter_scale; 00256 band2->scan = band1->scan; 00257 band2->inv_transform = band1->inv_transform; 00258 band2->dc_transform = band1->dc_transform; 00259 band2->is_2d_trans = band1->is_2d_trans; 00260 } 00261 00262 /* reallocate internal structures if needed */ 00263 if (blk_size_changed) { 00264 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, 00265 pic_conf.tile_height); 00266 if (result) { 00267 av_log(avctx, AV_LOG_ERROR, 00268 "Couldn't reallocate internal structures!\n"); 00269 return -1; 00270 } 00271 } 00272 00273 if (ctx->gop_flags & 8) { 00274 if (get_bits(&ctx->gb, 3)) { 00275 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); 00276 return -1; 00277 } 00278 00279 if (get_bits1(&ctx->gb)) 00280 skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ 00281 } 00282 00283 align_get_bits(&ctx->gb); 00284 00285 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ 00286 00287 /* skip GOP extension if any */ 00288 if (get_bits1(&ctx->gb)) { 00289 do { 00290 i = get_bits(&ctx->gb, 16); 00291 } while (i & 0x8000); 00292 } 00293 00294 align_get_bits(&ctx->gb); 00295 00296 return 0; 00297 } 00298 00299 00305 static inline void skip_hdr_extension(GetBitContext *gb) 00306 { 00307 int i, len; 00308 00309 do { 00310 len = get_bits(gb, 8); 00311 for (i = 0; i < len; i++) skip_bits(gb, 8); 00312 } while(len); 00313 } 00314 00315 00323 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx) 00324 { 00325 if (get_bits(&ctx->gb, 5) != 0x1F) { 00326 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); 00327 return -1; 00328 } 00329 00330 ctx->prev_frame_type = ctx->frame_type; 00331 ctx->frame_type = get_bits(&ctx->gb, 3); 00332 if (ctx->frame_type >= 5) { 00333 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); 00334 return -1; 00335 } 00336 00337 ctx->frame_num = get_bits(&ctx->gb, 8); 00338 00339 if (ctx->frame_type == FRAMETYPE_INTRA) { 00340 ctx->gop_invalid = 1; 00341 if (decode_gop_header(ctx, avctx)) 00342 return -1; 00343 ctx->gop_invalid = 0; 00344 } 00345 00346 if (ctx->frame_type != FRAMETYPE_NULL) { 00347 ctx->frame_flags = get_bits(&ctx->gb, 8); 00348 00349 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; 00350 00351 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; 00352 00353 /* skip unknown extension if any */ 00354 if (ctx->frame_flags & 0x20) 00355 skip_hdr_extension(&ctx->gb); /* XXX: untested */ 00356 00357 /* decode macroblock huffman codebook */ 00358 if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx)) 00359 return -1; 00360 00361 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ 00362 } 00363 00364 align_get_bits(&ctx->gb); 00365 00366 return 0; 00367 } 00368 00369 00378 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band, 00379 AVCodecContext *avctx) 00380 { 00381 int i; 00382 uint8_t band_flags; 00383 00384 band_flags = get_bits(&ctx->gb, 8); 00385 00386 if (band_flags & 1) { 00387 band->is_empty = 1; 00388 return 0; 00389 } 00390 00391 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; 00392 00393 band->inherit_mv = band_flags & 2; 00394 band->inherit_qdelta = band_flags & 8; 00395 band->qdelta_present = band_flags & 4; 00396 if (!band->qdelta_present) band->inherit_qdelta = 1; 00397 00398 /* decode rvmap probability corrections if any */ 00399 band->num_corr = 0; /* there are no corrections */ 00400 if (band_flags & 0x10) { 00401 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ 00402 if (band->num_corr > 61) { 00403 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", 00404 band->num_corr); 00405 return -1; 00406 } 00407 00408 /* read correction pairs */ 00409 for (i = 0; i < band->num_corr * 2; i++) 00410 band->corr[i] = get_bits(&ctx->gb, 8); 00411 } 00412 00413 /* select appropriate rvmap table for this band */ 00414 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; 00415 00416 /* decode block huffman codebook */ 00417 if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx)) 00418 return -1; 00419 00420 band->checksum_present = get_bits1(&ctx->gb); 00421 if (band->checksum_present) 00422 band->checksum = get_bits(&ctx->gb, 16); 00423 00424 band->glob_quant = get_bits(&ctx->gb, 5); 00425 00426 /* skip unknown extension if any */ 00427 if (band_flags & 0x20) { /* XXX: untested */ 00428 align_get_bits(&ctx->gb); 00429 skip_hdr_extension(&ctx->gb); 00430 } 00431 00432 align_get_bits(&ctx->gb); 00433 00434 return 0; 00435 } 00436 00437 00448 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band, 00449 IVITile *tile, AVCodecContext *avctx) 00450 { 00451 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, 00452 mv_scale, blks_per_mb; 00453 IVIMbInfo *mb, *ref_mb; 00454 int row_offset = band->mb_size * band->pitch; 00455 00456 mb = tile->mbs; 00457 ref_mb = tile->ref_mbs; 00458 offs = tile->ypos * band->pitch + tile->xpos; 00459 00460 if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { 00461 av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", 00462 tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); 00463 return AVERROR_INVALIDDATA; 00464 } 00465 00466 /* scale factor for motion vectors */ 00467 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); 00468 mv_x = mv_y = 0; 00469 00470 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { 00471 mb_offset = offs; 00472 00473 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { 00474 mb->xpos = x; 00475 mb->ypos = y; 00476 mb->buf_offs = mb_offset; 00477 00478 if (get_bits1(&ctx->gb)) { 00479 if (ctx->frame_type == FRAMETYPE_INTRA) { 00480 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); 00481 return -1; 00482 } 00483 mb->type = 1; /* empty macroblocks are always INTER */ 00484 mb->cbp = 0; /* all blocks are empty */ 00485 00486 mb->q_delta = 0; 00487 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { 00488 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00489 IVI_VLC_BITS, 1); 00490 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 00491 } 00492 00493 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ 00494 if (band->inherit_mv){ 00495 /* motion vector inheritance */ 00496 if (mv_scale) { 00497 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 00498 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 00499 } else { 00500 mb->mv_x = ref_mb->mv_x; 00501 mb->mv_y = ref_mb->mv_y; 00502 } 00503 } 00504 } else { 00505 if (band->inherit_mv) { 00506 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ 00507 } else if (ctx->frame_type == FRAMETYPE_INTRA) { 00508 mb->type = 0; /* mb_type is always INTRA for intra-frames */ 00509 } else { 00510 mb->type = get_bits1(&ctx->gb); 00511 } 00512 00513 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; 00514 mb->cbp = get_bits(&ctx->gb, blks_per_mb); 00515 00516 mb->q_delta = 0; 00517 if (band->qdelta_present) { 00518 if (band->inherit_qdelta) { 00519 if (ref_mb) mb->q_delta = ref_mb->q_delta; 00520 } else if (mb->cbp || (!band->plane && !band->band_num && 00521 (ctx->frame_flags & 8))) { 00522 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00523 IVI_VLC_BITS, 1); 00524 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 00525 } 00526 } 00527 00528 if (!mb->type) { 00529 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ 00530 } else { 00531 if (band->inherit_mv){ 00532 /* motion vector inheritance */ 00533 if (mv_scale) { 00534 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 00535 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 00536 } else { 00537 mb->mv_x = ref_mb->mv_x; 00538 mb->mv_y = ref_mb->mv_y; 00539 } 00540 } else { 00541 /* decode motion vector deltas */ 00542 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00543 IVI_VLC_BITS, 1); 00544 mv_y += IVI_TOSIGNED(mv_delta); 00545 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00546 IVI_VLC_BITS, 1); 00547 mv_x += IVI_TOSIGNED(mv_delta); 00548 mb->mv_x = mv_x; 00549 mb->mv_y = mv_y; 00550 } 00551 } 00552 } 00553 00554 mb++; 00555 if (ref_mb) 00556 ref_mb++; 00557 mb_offset += band->mb_size; 00558 } 00559 00560 offs += row_offset; 00561 } 00562 00563 align_get_bits(&ctx->gb); 00564 00565 return 0; 00566 } 00567 00568 00577 static int decode_band(IVI5DecContext *ctx, int plane_num, 00578 IVIBandDesc *band, AVCodecContext *avctx) 00579 { 00580 int result, i, t, idx1, idx2, pos; 00581 IVITile *tile; 00582 00583 band->buf = band->bufs[ctx->dst_buf]; 00584 band->ref_buf = band->bufs[ctx->ref_buf]; 00585 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3); 00586 00587 result = decode_band_hdr(ctx, band, avctx); 00588 if (result) { 00589 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n", 00590 result); 00591 return -1; 00592 } 00593 00594 if (band->is_empty) { 00595 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n"); 00596 return -1; 00597 } 00598 00599 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel]; 00600 00601 /* apply corrections to the selected rvmap table if present */ 00602 for (i = 0; i < band->num_corr; i++) { 00603 idx1 = band->corr[i*2]; 00604 idx2 = band->corr[i*2+1]; 00605 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); 00606 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); 00607 } 00608 00609 pos = get_bits_count(&ctx->gb); 00610 00611 for (t = 0; t < band->num_tiles; t++) { 00612 tile = &band->tiles[t]; 00613 00614 tile->is_empty = get_bits1(&ctx->gb); 00615 if (tile->is_empty) { 00616 result = ff_ivi_process_empty_tile(avctx, band, tile, 00617 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3)); 00618 if (result < 0) 00619 break; 00620 } else { 00621 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb); 00622 00623 result = decode_mb_info(ctx, band, tile, avctx); 00624 if (result < 0) 00625 break; 00626 00627 result = ff_ivi_decode_blocks(&ctx->gb, band, tile); 00628 if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) { 00629 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n"); 00630 break; 00631 } 00632 pos += tile->data_size << 3; // skip to next tile 00633 } 00634 } 00635 00636 /* restore the selected rvmap table by applying its corrections in reverse order */ 00637 for (i = band->num_corr-1; i >= 0; i--) { 00638 idx1 = band->corr[i*2]; 00639 idx2 = band->corr[i*2+1]; 00640 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); 00641 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); 00642 } 00643 00644 #ifdef DEBUG 00645 if (band->checksum_present) { 00646 uint16_t chksum = ivi_calc_band_checksum(band); 00647 if (chksum != band->checksum) { 00648 av_log(avctx, AV_LOG_ERROR, 00649 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n", 00650 band->plane, band->band_num, band->checksum, chksum); 00651 } 00652 } 00653 #endif 00654 00655 align_get_bits(&ctx->gb); 00656 00657 return result; 00658 } 00659 00660 00666 static void switch_buffers(IVI5DecContext *ctx) 00667 { 00668 switch (ctx->prev_frame_type) { 00669 case FRAMETYPE_INTRA: 00670 case FRAMETYPE_INTER: 00671 ctx->buf_switch ^= 1; 00672 ctx->dst_buf = ctx->buf_switch; 00673 ctx->ref_buf = ctx->buf_switch ^ 1; 00674 break; 00675 case FRAMETYPE_INTER_SCAL: 00676 if (!ctx->inter_scal) { 00677 ctx->ref2_buf = 2; 00678 ctx->inter_scal = 1; 00679 } 00680 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); 00681 ctx->ref_buf = ctx->ref2_buf; 00682 break; 00683 case FRAMETYPE_INTER_NOREF: 00684 break; 00685 } 00686 00687 switch (ctx->frame_type) { 00688 case FRAMETYPE_INTRA: 00689 ctx->buf_switch = 0; 00690 /* FALLTHROUGH */ 00691 case FRAMETYPE_INTER: 00692 ctx->inter_scal = 0; 00693 ctx->dst_buf = ctx->buf_switch; 00694 ctx->ref_buf = ctx->buf_switch ^ 1; 00695 break; 00696 case FRAMETYPE_INTER_SCAL: 00697 case FRAMETYPE_INTER_NOREF: 00698 case FRAMETYPE_NULL: 00699 break; 00700 } 00701 } 00702 00703 00707 static av_cold int decode_init(AVCodecContext *avctx) 00708 { 00709 IVI5DecContext *ctx = avctx->priv_data; 00710 int result; 00711 00712 ff_ivi_init_static_vlc(); 00713 00714 /* copy rvmap tables in our context so we can apply changes to them */ 00715 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); 00716 00717 /* set the initial picture layout according to the basic profile: 00718 there is only one band per plane (no scalability), only one tile (no local decoding) 00719 and picture format = YVU9 */ 00720 ctx->pic_conf.pic_width = avctx->width; 00721 ctx->pic_conf.pic_height = avctx->height; 00722 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; 00723 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; 00724 ctx->pic_conf.tile_width = avctx->width; 00725 ctx->pic_conf.tile_height = avctx->height; 00726 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; 00727 00728 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf); 00729 if (result) { 00730 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); 00731 return -1; 00732 } 00733 00734 ctx->buf_switch = 0; 00735 ctx->inter_scal = 0; 00736 00737 avctx->pix_fmt = PIX_FMT_YUV410P; 00738 00739 return 0; 00740 } 00741 00742 00746 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, 00747 AVPacket *avpkt) 00748 { 00749 IVI5DecContext *ctx = avctx->priv_data; 00750 const uint8_t *buf = avpkt->data; 00751 int buf_size = avpkt->size; 00752 int result, p, b; 00753 00754 init_get_bits(&ctx->gb, buf, buf_size * 8); 00755 ctx->frame_data = buf; 00756 ctx->frame_size = buf_size; 00757 00758 result = decode_pic_hdr(ctx, avctx); 00759 if (result || ctx->gop_invalid) { 00760 av_log(avctx, AV_LOG_ERROR, 00761 "Error while decoding picture header: %d\n", result); 00762 return -1; 00763 } 00764 00765 if (ctx->gop_flags & IVI5_IS_PROTECTED) { 00766 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n"); 00767 return -1; 00768 } 00769 00770 switch_buffers(ctx); 00771 00772 //START_TIMER; 00773 00774 if (ctx->frame_type != FRAMETYPE_NULL) { 00775 for (p = 0; p < 3; p++) { 00776 for (b = 0; b < ctx->planes[p].num_bands; b++) { 00777 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx); 00778 if (result) { 00779 av_log(avctx, AV_LOG_ERROR, 00780 "Error while decoding band: %d, plane: %d\n", b, p); 00781 return -1; 00782 } 00783 } 00784 } 00785 } 00786 00787 //STOP_TIMER("decode_planes"); 00788 00789 if (ctx->frame.data[0]) 00790 avctx->release_buffer(avctx, &ctx->frame); 00791 00792 ctx->frame.reference = 0; 00793 if (avctx->get_buffer(avctx, &ctx->frame) < 0) { 00794 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 00795 return -1; 00796 } 00797 00798 if (ctx->is_scalable) { 00799 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4); 00800 } else { 00801 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]); 00802 } 00803 00804 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]); 00805 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]); 00806 00807 *data_size = sizeof(AVFrame); 00808 *(AVFrame*)data = ctx->frame; 00809 00810 return buf_size; 00811 } 00812 00813 00817 static av_cold int decode_close(AVCodecContext *avctx) 00818 { 00819 IVI5DecContext *ctx = avctx->priv_data; 00820 00821 ff_ivi_free_buffers(&ctx->planes[0]); 00822 00823 if (ctx->mb_vlc.cust_tab.table) 00824 free_vlc(&ctx->mb_vlc.cust_tab); 00825 00826 if (ctx->frame.data[0]) 00827 avctx->release_buffer(avctx, &ctx->frame); 00828 00829 return 0; 00830 } 00831 00832 00833 AVCodec ff_indeo5_decoder = { 00834 .name = "indeo5", 00835 .type = AVMEDIA_TYPE_VIDEO, 00836 .id = CODEC_ID_INDEO5, 00837 .priv_data_size = sizeof(IVI5DecContext), 00838 .init = decode_init, 00839 .close = decode_close, 00840 .decode = decode_frame, 00841 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), 00842 };