Libav
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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 FFmpeg. 00006 * 00007 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 } IVI5DecContext; 00080 00081 00091 static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx) 00092 { 00093 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, blk_size_changed = 0; 00094 IVIBandDesc *band, *band1, *band2; 00095 IVIPicConfig pic_conf; 00096 00097 ctx->gop_flags = get_bits(&ctx->gb, 8); 00098 00099 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; 00100 00101 if (ctx->gop_flags & IVI5_IS_PROTECTED) 00102 ctx->lock_word = get_bits_long(&ctx->gb, 32); 00103 00104 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; 00105 if (tile_size > 256) { 00106 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); 00107 return -1; 00108 } 00109 00110 /* decode number of wavelet bands */ 00111 /* num_levels * 3 + 1 */ 00112 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; 00113 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; 00114 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; 00115 if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { 00116 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", 00117 pic_conf.luma_bands, pic_conf.chroma_bands); 00118 return -1; 00119 } 00120 00121 pic_size_indx = get_bits(&ctx->gb, 4); 00122 if (pic_size_indx == IVI5_PIC_SIZE_ESC) { 00123 pic_conf.pic_height = get_bits(&ctx->gb, 13); 00124 pic_conf.pic_width = get_bits(&ctx->gb, 13); 00125 } else { 00126 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; 00127 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; 00128 } 00129 00130 if (ctx->gop_flags & 2) { 00131 av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n"); 00132 return -1; 00133 } 00134 00135 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; 00136 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; 00137 00138 if (!tile_size) { 00139 pic_conf.tile_height = pic_conf.pic_height; 00140 pic_conf.tile_width = pic_conf.pic_width; 00141 } else { 00142 pic_conf.tile_height = pic_conf.tile_width = tile_size; 00143 } 00144 00145 /* check if picture layout was changed and reallocate buffers */ 00146 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { 00147 result = ff_ivi_init_planes(ctx->planes, &pic_conf); 00148 if (result) { 00149 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); 00150 return -1; 00151 } 00152 ctx->pic_conf = pic_conf; 00153 blk_size_changed = 1; /* force reallocation of the internal structures */ 00154 } 00155 00156 for (p = 0; p <= 1; p++) { 00157 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { 00158 band = &ctx->planes[p].bands[i]; 00159 00160 band->is_halfpel = get_bits1(&ctx->gb); 00161 00162 mb_size = get_bits1(&ctx->gb); 00163 blk_size = 8 >> get_bits1(&ctx->gb); 00164 mb_size = blk_size << !mb_size; 00165 00166 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; 00167 if (blk_size_changed) { 00168 band->mb_size = mb_size; 00169 band->blk_size = blk_size; 00170 } 00171 00172 if (get_bits1(&ctx->gb)) { 00173 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n"); 00174 return -1; 00175 } 00176 00177 /* select transform function and scan pattern according to plane and band number */ 00178 switch ((p << 2) + i) { 00179 case 0: 00180 band->inv_transform = ff_ivi_inverse_slant_8x8; 00181 band->dc_transform = ff_ivi_dc_slant_2d; 00182 band->scan = ff_zigzag_direct; 00183 break; 00184 00185 case 1: 00186 band->inv_transform = ff_ivi_row_slant8; 00187 band->dc_transform = ff_ivi_dc_row_slant; 00188 band->scan = ivi5_scans8x8[0]; 00189 break; 00190 00191 case 2: 00192 band->inv_transform = ff_ivi_col_slant8; 00193 band->dc_transform = ff_ivi_dc_col_slant; 00194 band->scan = ivi5_scans8x8[1]; 00195 break; 00196 00197 case 3: 00198 band->inv_transform = ff_ivi_put_pixels_8x8; 00199 band->dc_transform = ff_ivi_put_dc_pixel_8x8; 00200 band->scan = ivi5_scans8x8[1]; 00201 break; 00202 00203 case 4: 00204 band->inv_transform = ff_ivi_inverse_slant_4x4; 00205 band->dc_transform = ff_ivi_dc_slant_2d; 00206 band->scan = ivi5_scan4x4; 00207 break; 00208 } 00209 00210 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || 00211 band->inv_transform == ff_ivi_inverse_slant_4x4; 00212 00213 /* select dequant matrix according to plane and band number */ 00214 if (!p) { 00215 band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; 00216 } else { 00217 band->quant_mat = 5; 00218 } 00219 00220 if (get_bits(&ctx->gb, 2)) { 00221 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); 00222 return -1; 00223 } 00224 } 00225 } 00226 00227 /* copy chroma parameters into the 2nd chroma plane */ 00228 for (i = 0; i < pic_conf.chroma_bands; i++) { 00229 band1 = &ctx->planes[1].bands[i]; 00230 band2 = &ctx->planes[2].bands[i]; 00231 00232 band2->width = band1->width; 00233 band2->height = band1->height; 00234 band2->mb_size = band1->mb_size; 00235 band2->blk_size = band1->blk_size; 00236 band2->is_halfpel = band1->is_halfpel; 00237 band2->quant_mat = band1->quant_mat; 00238 band2->scan = band1->scan; 00239 band2->inv_transform = band1->inv_transform; 00240 band2->dc_transform = band1->dc_transform; 00241 band2->is_2d_trans = band1->is_2d_trans; 00242 } 00243 00244 /* reallocate internal structures if needed */ 00245 if (blk_size_changed) { 00246 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, 00247 pic_conf.tile_height); 00248 if (result) { 00249 av_log(avctx, AV_LOG_ERROR, 00250 "Couldn't reallocate internal structures!\n"); 00251 return -1; 00252 } 00253 } 00254 00255 if (ctx->gop_flags & 8) { 00256 if (get_bits(&ctx->gb, 3)) { 00257 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); 00258 return -1; 00259 } 00260 00261 if (get_bits1(&ctx->gb)) 00262 skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ 00263 } 00264 00265 align_get_bits(&ctx->gb); 00266 00267 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ 00268 00269 /* skip GOP extension if any */ 00270 if (get_bits1(&ctx->gb)) { 00271 do { 00272 i = get_bits(&ctx->gb, 16); 00273 } while (i & 0x8000); 00274 } 00275 00276 align_get_bits(&ctx->gb); 00277 00278 return 0; 00279 } 00280 00281 00287 static inline void skip_hdr_extension(GetBitContext *gb) 00288 { 00289 int i, len; 00290 00291 do { 00292 len = get_bits(gb, 8); 00293 for (i = 0; i < len; i++) skip_bits(gb, 8); 00294 } while(len); 00295 } 00296 00297 00305 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx) 00306 { 00307 if (get_bits(&ctx->gb, 5) != 0x1F) { 00308 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); 00309 return -1; 00310 } 00311 00312 ctx->prev_frame_type = ctx->frame_type; 00313 ctx->frame_type = get_bits(&ctx->gb, 3); 00314 if (ctx->frame_type >= 5) { 00315 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); 00316 return -1; 00317 } 00318 00319 ctx->frame_num = get_bits(&ctx->gb, 8); 00320 00321 if (ctx->frame_type == FRAMETYPE_INTRA) { 00322 if (decode_gop_header(ctx, avctx)) 00323 return -1; 00324 } 00325 00326 if (ctx->frame_type != FRAMETYPE_NULL) { 00327 ctx->frame_flags = get_bits(&ctx->gb, 8); 00328 00329 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; 00330 00331 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; 00332 00333 /* skip unknown extension if any */ 00334 if (ctx->frame_flags & 0x20) 00335 skip_hdr_extension(&ctx->gb); /* XXX: untested */ 00336 00337 /* decode macroblock huffman codebook */ 00338 if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx)) 00339 return -1; 00340 00341 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ 00342 } 00343 00344 align_get_bits(&ctx->gb); 00345 00346 return 0; 00347 } 00348 00349 00358 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band, 00359 AVCodecContext *avctx) 00360 { 00361 int i; 00362 uint8_t band_flags; 00363 00364 band_flags = get_bits(&ctx->gb, 8); 00365 00366 if (band_flags & 1) { 00367 band->is_empty = 1; 00368 return 0; 00369 } 00370 00371 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; 00372 00373 band->inherit_mv = band_flags & 2; 00374 band->inherit_qdelta = band_flags & 8; 00375 band->qdelta_present = band_flags & 4; 00376 if (!band->qdelta_present) band->inherit_qdelta = 1; 00377 00378 /* decode rvmap probability corrections if any */ 00379 band->num_corr = 0; /* there are no corrections */ 00380 if (band_flags & 0x10) { 00381 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ 00382 if (band->num_corr > 61) { 00383 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", 00384 band->num_corr); 00385 return -1; 00386 } 00387 00388 /* read correction pairs */ 00389 for (i = 0; i < band->num_corr * 2; i++) 00390 band->corr[i] = get_bits(&ctx->gb, 8); 00391 } 00392 00393 /* select appropriate rvmap table for this band */ 00394 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; 00395 00396 /* decode block huffman codebook */ 00397 if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx)) 00398 return -1; 00399 00400 band->checksum_present = get_bits1(&ctx->gb); 00401 if (band->checksum_present) 00402 band->checksum = get_bits(&ctx->gb, 16); 00403 00404 band->glob_quant = get_bits(&ctx->gb, 5); 00405 00406 /* skip unknown extension if any */ 00407 if (band_flags & 0x20) { /* XXX: untested */ 00408 align_get_bits(&ctx->gb); 00409 skip_hdr_extension(&ctx->gb); 00410 } 00411 00412 align_get_bits(&ctx->gb); 00413 00414 return 0; 00415 } 00416 00417 00428 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band, 00429 IVITile *tile, AVCodecContext *avctx) 00430 { 00431 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, 00432 mv_scale, blks_per_mb; 00433 IVIMbInfo *mb, *ref_mb; 00434 int row_offset = band->mb_size * band->pitch; 00435 00436 mb = tile->mbs; 00437 ref_mb = tile->ref_mbs; 00438 offs = tile->ypos * band->pitch + tile->xpos; 00439 00440 /* scale factor for motion vectors */ 00441 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); 00442 mv_x = mv_y = 0; 00443 00444 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { 00445 mb_offset = offs; 00446 00447 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { 00448 mb->xpos = x; 00449 mb->ypos = y; 00450 mb->buf_offs = mb_offset; 00451 00452 if (get_bits1(&ctx->gb)) { 00453 if (ctx->frame_type == FRAMETYPE_INTRA) { 00454 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); 00455 return -1; 00456 } 00457 mb->type = 1; /* empty macroblocks are always INTER */ 00458 mb->cbp = 0; /* all blocks are empty */ 00459 00460 mb->q_delta = 0; 00461 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { 00462 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00463 IVI_VLC_BITS, 1); 00464 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 00465 } 00466 00467 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ 00468 if (band->inherit_mv){ 00469 /* motion vector inheritance */ 00470 if (mv_scale) { 00471 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 00472 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 00473 } else { 00474 mb->mv_x = ref_mb->mv_x; 00475 mb->mv_y = ref_mb->mv_y; 00476 } 00477 } 00478 } else { 00479 if (band->inherit_mv) { 00480 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ 00481 } else if (ctx->frame_type == FRAMETYPE_INTRA) { 00482 mb->type = 0; /* mb_type is always INTRA for intra-frames */ 00483 } else { 00484 mb->type = get_bits1(&ctx->gb); 00485 } 00486 00487 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; 00488 mb->cbp = get_bits(&ctx->gb, blks_per_mb); 00489 00490 mb->q_delta = 0; 00491 if (band->qdelta_present) { 00492 if (band->inherit_qdelta) { 00493 if (ref_mb) mb->q_delta = ref_mb->q_delta; 00494 } else if (mb->cbp || (!band->plane && !band->band_num && 00495 (ctx->frame_flags & 8))) { 00496 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00497 IVI_VLC_BITS, 1); 00498 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 00499 } 00500 } 00501 00502 if (!mb->type) { 00503 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ 00504 } else { 00505 if (band->inherit_mv){ 00506 /* motion vector inheritance */ 00507 if (mv_scale) { 00508 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 00509 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 00510 } else { 00511 mb->mv_x = ref_mb->mv_x; 00512 mb->mv_y = ref_mb->mv_y; 00513 } 00514 } else { 00515 /* decode motion vector deltas */ 00516 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00517 IVI_VLC_BITS, 1); 00518 mv_y += IVI_TOSIGNED(mv_delta); 00519 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 00520 IVI_VLC_BITS, 1); 00521 mv_x += IVI_TOSIGNED(mv_delta); 00522 mb->mv_x = mv_x; 00523 mb->mv_y = mv_y; 00524 } 00525 } 00526 } 00527 00528 mb++; 00529 if (ref_mb) 00530 ref_mb++; 00531 mb_offset += band->mb_size; 00532 } 00533 00534 offs += row_offset; 00535 } 00536 00537 align_get_bits(&ctx->gb); 00538 00539 return 0; 00540 } 00541 00542 00551 static int decode_band(IVI5DecContext *ctx, int plane_num, 00552 IVIBandDesc *band, AVCodecContext *avctx) 00553 { 00554 int result, i, t, idx1, idx2, pos; 00555 IVITile *tile; 00556 00557 band->buf = band->bufs[ctx->dst_buf]; 00558 band->ref_buf = band->bufs[ctx->ref_buf]; 00559 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3); 00560 00561 result = decode_band_hdr(ctx, band, avctx); 00562 if (result) { 00563 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n", 00564 result); 00565 return -1; 00566 } 00567 00568 if (band->is_empty) { 00569 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n"); 00570 return -1; 00571 } 00572 00573 if (band->blk_size == 8) { 00574 band->intra_base = &ivi5_base_quant_8x8_intra[band->quant_mat][0]; 00575 band->inter_base = &ivi5_base_quant_8x8_inter[band->quant_mat][0]; 00576 band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0]; 00577 band->inter_scale = &ivi5_scale_quant_8x8_inter[band->quant_mat][0]; 00578 } else { 00579 band->intra_base = ivi5_base_quant_4x4_intra; 00580 band->inter_base = ivi5_base_quant_4x4_inter; 00581 band->intra_scale = ivi5_scale_quant_4x4_intra; 00582 band->inter_scale = ivi5_scale_quant_4x4_inter; 00583 } 00584 00585 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel]; 00586 00587 /* apply corrections to the selected rvmap table if present */ 00588 for (i = 0; i < band->num_corr; i++) { 00589 idx1 = band->corr[i*2]; 00590 idx2 = band->corr[i*2+1]; 00591 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); 00592 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); 00593 } 00594 00595 pos = get_bits_count(&ctx->gb); 00596 00597 for (t = 0; t < band->num_tiles; t++) { 00598 tile = &band->tiles[t]; 00599 00600 tile->is_empty = get_bits1(&ctx->gb); 00601 if (tile->is_empty) { 00602 ff_ivi_process_empty_tile(avctx, band, tile, 00603 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3)); 00604 } else { 00605 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb); 00606 00607 result = decode_mb_info(ctx, band, tile, avctx); 00608 if (result < 0) 00609 break; 00610 00611 result = ff_ivi_decode_blocks(&ctx->gb, band, tile); 00612 if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) { 00613 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n"); 00614 break; 00615 } 00616 pos += tile->data_size << 3; // skip to next tile 00617 } 00618 } 00619 00620 /* restore the selected rvmap table by applying its corrections in reverse order */ 00621 for (i = band->num_corr-1; i >= 0; i--) { 00622 idx1 = band->corr[i*2]; 00623 idx2 = band->corr[i*2+1]; 00624 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); 00625 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); 00626 } 00627 00628 #if IVI_DEBUG 00629 if (band->checksum_present) { 00630 uint16_t chksum = ivi_calc_band_checksum(band); 00631 if (chksum != band->checksum) { 00632 av_log(avctx, AV_LOG_ERROR, 00633 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n", 00634 band->plane, band->band_num, band->checksum, chksum); 00635 } 00636 } 00637 #endif 00638 00639 align_get_bits(&ctx->gb); 00640 00641 return result; 00642 } 00643 00644 00651 static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx) 00652 { 00653 switch (ctx->prev_frame_type) { 00654 case FRAMETYPE_INTRA: 00655 case FRAMETYPE_INTER: 00656 ctx->buf_switch ^= 1; 00657 ctx->dst_buf = ctx->buf_switch; 00658 ctx->ref_buf = ctx->buf_switch ^ 1; 00659 break; 00660 case FRAMETYPE_INTER_SCAL: 00661 if (!ctx->inter_scal) { 00662 ctx->ref2_buf = 2; 00663 ctx->inter_scal = 1; 00664 } 00665 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); 00666 ctx->ref_buf = ctx->ref2_buf; 00667 break; 00668 case FRAMETYPE_INTER_NOREF: 00669 break; 00670 } 00671 00672 switch (ctx->frame_type) { 00673 case FRAMETYPE_INTRA: 00674 ctx->buf_switch = 0; 00675 /* FALLTHROUGH */ 00676 case FRAMETYPE_INTER: 00677 ctx->inter_scal = 0; 00678 ctx->dst_buf = ctx->buf_switch; 00679 ctx->ref_buf = ctx->buf_switch ^ 1; 00680 break; 00681 case FRAMETYPE_INTER_SCAL: 00682 case FRAMETYPE_INTER_NOREF: 00683 case FRAMETYPE_NULL: 00684 break; 00685 } 00686 } 00687 00688 00692 static av_cold int decode_init(AVCodecContext *avctx) 00693 { 00694 IVI5DecContext *ctx = avctx->priv_data; 00695 int result; 00696 00697 ff_ivi_init_static_vlc(); 00698 00699 /* copy rvmap tables in our context so we can apply changes to them */ 00700 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); 00701 00702 /* set the initial picture layout according to the basic profile: 00703 there is only one band per plane (no scalability), only one tile (no local decoding) 00704 and picture format = YVU9 */ 00705 ctx->pic_conf.pic_width = avctx->width; 00706 ctx->pic_conf.pic_height = avctx->height; 00707 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; 00708 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; 00709 ctx->pic_conf.tile_width = avctx->width; 00710 ctx->pic_conf.tile_height = avctx->height; 00711 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; 00712 00713 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf); 00714 if (result) { 00715 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); 00716 return -1; 00717 } 00718 00719 ctx->buf_switch = 0; 00720 ctx->inter_scal = 0; 00721 00722 avctx->pix_fmt = PIX_FMT_YUV410P; 00723 00724 return 0; 00725 } 00726 00727 00731 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, 00732 AVPacket *avpkt) 00733 { 00734 IVI5DecContext *ctx = avctx->priv_data; 00735 const uint8_t *buf = avpkt->data; 00736 int buf_size = avpkt->size; 00737 int result, p, b; 00738 00739 init_get_bits(&ctx->gb, buf, buf_size * 8); 00740 ctx->frame_data = buf; 00741 ctx->frame_size = buf_size; 00742 00743 result = decode_pic_hdr(ctx, avctx); 00744 if (result) { 00745 av_log(avctx, AV_LOG_ERROR, 00746 "Error while decoding picture header: %d\n", result); 00747 return -1; 00748 } 00749 00750 if (ctx->gop_flags & IVI5_IS_PROTECTED) { 00751 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n"); 00752 return -1; 00753 } 00754 00755 switch_buffers(ctx, avctx); 00756 00757 //START_TIMER; 00758 00759 if (ctx->frame_type != FRAMETYPE_NULL) { 00760 for (p = 0; p < 3; p++) { 00761 for (b = 0; b < ctx->planes[p].num_bands; b++) { 00762 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx); 00763 if (result) { 00764 av_log(avctx, AV_LOG_ERROR, 00765 "Error while decoding band: %d, plane: %d\n", b, p); 00766 return -1; 00767 } 00768 } 00769 } 00770 } 00771 00772 //STOP_TIMER("decode_planes"); 00773 00774 if (ctx->frame.data[0]) 00775 avctx->release_buffer(avctx, &ctx->frame); 00776 00777 ctx->frame.reference = 0; 00778 if (avctx->get_buffer(avctx, &ctx->frame) < 0) { 00779 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 00780 return -1; 00781 } 00782 00783 if (ctx->is_scalable) { 00784 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4); 00785 } else { 00786 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]); 00787 } 00788 00789 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]); 00790 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]); 00791 00792 *data_size = sizeof(AVFrame); 00793 *(AVFrame*)data = ctx->frame; 00794 00795 return buf_size; 00796 } 00797 00798 00802 static av_cold int decode_close(AVCodecContext *avctx) 00803 { 00804 IVI5DecContext *ctx = avctx->priv_data; 00805 00806 ff_ivi_free_buffers(&ctx->planes[0]); 00807 00808 if (ctx->mb_vlc.cust_tab.table) 00809 free_vlc(&ctx->mb_vlc.cust_tab); 00810 00811 if (ctx->frame.data[0]) 00812 avctx->release_buffer(avctx, &ctx->frame); 00813 00814 return 0; 00815 } 00816 00817 00818 AVCodec indeo5_decoder = { 00819 .name = "indeo5", 00820 .type = AVMEDIA_TYPE_VIDEO, 00821 .id = CODEC_ID_INDEO5, 00822 .priv_data_size = sizeof(IVI5DecContext), 00823 .init = decode_init, 00824 .close = decode_close, 00825 .decode = decode_frame, 00826 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), 00827 };