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00030 #define 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 "indeo4data.h"
00037
00038 #define IVI4_STREAM_ANALYSER 0
00039 #define IVI4_DEBUG_CHECKSUM 0
00040
00044 enum {
00045 FRAMETYPE_INTRA = 0,
00046 FRAMETYPE_BIDIR1 = 1,
00047 FRAMETYPE_INTER = 2,
00048 FRAMETYPE_BIDIR = 3,
00049 FRAMETYPE_INTER_NOREF = 4,
00050 FRAMETYPE_NULL_FIRST = 5,
00051 FRAMETYPE_NULL_LAST = 6
00052 };
00053
00054 #define IVI4_PIC_SIZE_ESC 7
00055
00056
00057 typedef struct {
00058 GetBitContext gb;
00059 AVFrame frame;
00060 RVMapDesc rvmap_tabs[9];
00061
00062 uint32_t frame_num;
00063 int frame_type;
00064 int prev_frame_type;
00065 uint32_t data_size;
00066 int is_scalable;
00067 int transp_status;
00068
00069 IVIPicConfig pic_conf;
00070 IVIPlaneDesc planes[3];
00071
00072 int buf_switch;
00073 int dst_buf;
00074 int ref_buf;
00075
00076 IVIHuffTab mb_vlc;
00077 IVIHuffTab blk_vlc;
00078
00079 uint16_t checksum;
00080
00081 uint8_t rvmap_sel;
00082 uint8_t in_imf;
00083 uint8_t in_q;
00084 uint8_t pic_glob_quant;
00085 uint8_t unknown1;
00086
00087 #if IVI4_STREAM_ANALYSER
00088 uint8_t has_b_frames;
00089 uint8_t has_transp;
00090 uint8_t uses_tiling;
00091 uint8_t uses_haar;
00092 uint8_t uses_fullpel;
00093 #endif
00094 } IVI4DecContext;
00095
00096
00097 static const struct {
00098 InvTransformPtr *inv_trans;
00099 DCTransformPtr *dc_trans;
00100 int is_2d_trans;
00101 } transforms[18] = {
00102 { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 },
00103 { NULL, NULL, 0 },
00104 { NULL, NULL, 0 },
00105 { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 },
00106 { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 },
00107 { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 },
00108 { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 },
00109 { NULL, NULL, 0 },
00110 { NULL, NULL, 0 },
00111 { NULL, NULL, 0 },
00112 { NULL, NULL, 0 },
00113 { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 },
00114 { NULL, NULL, 0 },
00115 { NULL, NULL, 0 },
00116 { NULL, NULL, 0 },
00117 { NULL, NULL, 0 },
00118 { NULL, NULL, 0 },
00119 { NULL, NULL, 0 },
00120 };
00121
00132 static int decode_plane_subdivision(GetBitContext *gb)
00133 {
00134 int i;
00135
00136 switch (get_bits(gb, 2)) {
00137 case 3:
00138 return 1;
00139 case 2:
00140 for (i = 0; i < 4; i++)
00141 if (get_bits(gb, 2) != 3)
00142 return 0;
00143 return 4;
00144 default:
00145 return 0;
00146 }
00147 }
00148
00149 static inline int scale_tile_size(int def_size, int size_factor)
00150 {
00151 return size_factor == 15 ? def_size : (size_factor + 1) << 5;
00152 }
00153
00161 static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx)
00162 {
00163 int pic_size_indx, i, p;
00164 IVIPicConfig pic_conf;
00165
00166 if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
00167 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
00168 return AVERROR_INVALIDDATA;
00169 }
00170
00171 ctx->prev_frame_type = ctx->frame_type;
00172 ctx->frame_type = get_bits(&ctx->gb, 3);
00173 if (ctx->frame_type == 7) {
00174 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
00175 return AVERROR_INVALIDDATA;
00176 }
00177
00178 #if IVI4_STREAM_ANALYSER
00179 if ( ctx->frame_type == FRAMETYPE_BIDIR1
00180 || ctx->frame_type == FRAMETYPE_BIDIR)
00181 ctx->has_b_frames = 1;
00182 #endif
00183
00184 ctx->transp_status = get_bits1(&ctx->gb);
00185 #if IVI4_STREAM_ANALYSER
00186 if (ctx->transp_status) {
00187 ctx->has_transp = 1;
00188 }
00189 #endif
00190
00191
00192 if (get_bits1(&ctx->gb)) {
00193 av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
00194 return AVERROR_INVALIDDATA;
00195 }
00196
00197 ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
00198
00199
00200 if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) {
00201 av_dlog(avctx, "Null frame encountered!\n");
00202 return 0;
00203 }
00204
00205
00206
00207
00208 if (get_bits1(&ctx->gb)) {
00209 skip_bits_long(&ctx->gb, 32);
00210 av_dlog(avctx, "Password-protected clip!\n");
00211 }
00212
00213 pic_size_indx = get_bits(&ctx->gb, 3);
00214 if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
00215 pic_conf.pic_height = get_bits(&ctx->gb, 16);
00216 pic_conf.pic_width = get_bits(&ctx->gb, 16);
00217 } else {
00218 pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
00219 pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ];
00220 }
00221
00222
00223 if (get_bits1(&ctx->gb)) {
00224 pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
00225 pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4));
00226 #if IVI4_STREAM_ANALYSER
00227 ctx->uses_tiling = 1;
00228 #endif
00229 } else {
00230 pic_conf.tile_height = pic_conf.pic_height;
00231 pic_conf.tile_width = pic_conf.pic_width;
00232 }
00233
00234
00235 if (get_bits(&ctx->gb, 2)) {
00236 av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
00237 return AVERROR_INVALIDDATA;
00238 }
00239 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
00240 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
00241
00242
00243 pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
00244 if (pic_conf.luma_bands)
00245 pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
00246 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
00247 if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
00248 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
00249 pic_conf.luma_bands, pic_conf.chroma_bands);
00250 return AVERROR_INVALIDDATA;
00251 }
00252
00253
00254 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
00255 if (ff_ivi_init_planes(ctx->planes, &pic_conf)) {
00256 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
00257 return AVERROR(ENOMEM);
00258 }
00259
00260 ctx->pic_conf = pic_conf;
00261
00262
00263 for (p = 0; p <= 2; p++) {
00264 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
00265 ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
00266 ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
00267 }
00268 }
00269
00270 if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width,
00271 ctx->pic_conf.tile_height)) {
00272 av_log(avctx, AV_LOG_ERROR,
00273 "Couldn't reallocate internal structures!\n");
00274 return AVERROR(ENOMEM);
00275 }
00276 }
00277
00278 ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
00279
00280
00281 if (get_bits1(&ctx->gb))
00282 skip_bits(&ctx->gb, 8);
00283
00284
00285 if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) ||
00286 ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
00287 return AVERROR_INVALIDDATA;
00288
00289 ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
00290
00291 ctx->in_imf = get_bits1(&ctx->gb);
00292 ctx->in_q = get_bits1(&ctx->gb);
00293
00294 ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
00295
00296
00297 ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
00298
00299 ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
00300
00301
00302 while (get_bits1(&ctx->gb)) {
00303 av_dlog(avctx, "Pic hdr extension encountered!\n");
00304 skip_bits(&ctx->gb, 8);
00305 }
00306
00307 if (get_bits1(&ctx->gb)) {
00308 av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
00309 }
00310
00311 align_get_bits(&ctx->gb);
00312
00313 return 0;
00314 }
00315
00316
00325 static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
00326 AVCodecContext *avctx)
00327 {
00328 int plane, band_num, indx, transform_id, scan_indx;
00329 int i;
00330
00331 plane = get_bits(&ctx->gb, 2);
00332 band_num = get_bits(&ctx->gb, 4);
00333 if (band->plane != plane || band->band_num != band_num) {
00334 av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
00335 return AVERROR_INVALIDDATA;
00336 }
00337
00338 band->is_empty = get_bits1(&ctx->gb);
00339 if (!band->is_empty) {
00340
00341
00342 if (get_bits1(&ctx->gb))
00343 skip_bits(&ctx->gb, 16);
00344
00345 band->is_halfpel = get_bits(&ctx->gb, 2);
00346 if (band->is_halfpel >= 2) {
00347 av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n",
00348 band->is_halfpel);
00349 return AVERROR_INVALIDDATA;
00350 }
00351 #if IVI4_STREAM_ANALYSER
00352 if (!band->is_halfpel)
00353 ctx->uses_fullpel = 1;
00354 #endif
00355
00356 band->checksum_present = get_bits1(&ctx->gb);
00357 if (band->checksum_present)
00358 band->checksum = get_bits(&ctx->gb, 16);
00359
00360 indx = get_bits(&ctx->gb, 2);
00361 if (indx == 3) {
00362 av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n");
00363 return AVERROR_INVALIDDATA;
00364 }
00365 band->mb_size = 16 >> indx;
00366 band->blk_size = 8 >> (indx >> 1);
00367
00368 band->inherit_mv = get_bits1(&ctx->gb);
00369 band->inherit_qdelta = get_bits1(&ctx->gb);
00370
00371 band->glob_quant = get_bits(&ctx->gb, 5);
00372
00373 if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) {
00374 transform_id = get_bits(&ctx->gb, 5);
00375 if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
00376 !transforms[transform_id].inv_trans) {
00377 av_log_ask_for_sample(avctx, "Unimplemented transform: %d!\n", transform_id);
00378 return AVERROR_PATCHWELCOME;
00379 }
00380 if ((transform_id >= 7 && transform_id <= 9) ||
00381 transform_id == 17) {
00382 av_log_ask_for_sample(avctx, "DCT transform not supported yet!\n");
00383 return AVERROR_PATCHWELCOME;
00384 }
00385
00386 #if IVI4_STREAM_ANALYSER
00387 if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10)
00388 ctx->uses_haar = 1;
00389 #endif
00390
00391 band->inv_transform = transforms[transform_id].inv_trans;
00392 band->dc_transform = transforms[transform_id].dc_trans;
00393 band->is_2d_trans = transforms[transform_id].is_2d_trans;
00394
00395 scan_indx = get_bits(&ctx->gb, 4);
00396 if (scan_indx == 15) {
00397 av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
00398 return AVERROR_INVALIDDATA;
00399 }
00400 band->scan = scan_index_to_tab[scan_indx];
00401
00402 band->quant_mat = get_bits(&ctx->gb, 5);
00403 if (band->quant_mat == 31) {
00404 av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
00405 return AVERROR_INVALIDDATA;
00406 }
00407 }
00408
00409
00410 if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF,
00411 &band->blk_vlc, avctx))
00412 return AVERROR_INVALIDDATA;
00413
00414
00415 band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
00416
00417
00418 band->num_corr = 0;
00419 if (get_bits1(&ctx->gb)) {
00420 band->num_corr = get_bits(&ctx->gb, 8);
00421 if (band->num_corr > 61) {
00422 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
00423 band->num_corr);
00424 return AVERROR_INVALIDDATA;
00425 }
00426
00427
00428 for (i = 0; i < band->num_corr * 2; i++)
00429 band->corr[i] = get_bits(&ctx->gb, 8);
00430 }
00431 }
00432
00433 if (band->blk_size == 8) {
00434 band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0];
00435 band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0];
00436 } else {
00437 band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0];
00438 band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0];
00439 }
00440
00441
00442 band->intra_scale = NULL;
00443 band->inter_scale = NULL;
00444
00445 align_get_bits(&ctx->gb);
00446
00447 return 0;
00448 }
00449
00450
00461 static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band,
00462 IVITile *tile, AVCodecContext *avctx)
00463 {
00464 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
00465 mv_scale, mb_type_bits;
00466 IVIMbInfo *mb, *ref_mb;
00467 int row_offset = band->mb_size * band->pitch;
00468
00469 mb = tile->mbs;
00470 ref_mb = tile->ref_mbs;
00471 offs = tile->ypos * band->pitch + tile->xpos;
00472
00473 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
00474 mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1;
00475
00476
00477 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
00478 mv_x = mv_y = 0;
00479
00480 for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
00481 mb_offset = offs;
00482
00483 for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) {
00484 mb->xpos = x;
00485 mb->ypos = y;
00486 mb->buf_offs = mb_offset;
00487
00488 if (get_bits1(&ctx->gb)) {
00489 if (ctx->frame_type == FRAMETYPE_INTRA) {
00490 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
00491 return AVERROR_INVALIDDATA;
00492 }
00493 mb->type = 1;
00494 mb->cbp = 0;
00495
00496 mb->q_delta = 0;
00497 if (!band->plane && !band->band_num && ctx->in_q) {
00498 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00499 IVI_VLC_BITS, 1);
00500 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00501 }
00502
00503 mb->mv_x = mb->mv_y = 0;
00504 if (band->inherit_mv) {
00505
00506 if (mv_scale) {
00507 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00508 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00509 } else {
00510 mb->mv_x = ref_mb->mv_x;
00511 mb->mv_y = ref_mb->mv_y;
00512 }
00513 }
00514 } else {
00515 if (band->inherit_mv) {
00516 mb->type = ref_mb->type;
00517 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
00518 mb->type = 0;
00519 } else {
00520 mb->type = get_bits(&ctx->gb, mb_type_bits);
00521 }
00522
00523 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
00524
00525 mb->q_delta = 0;
00526 if (band->inherit_qdelta) {
00527 if (ref_mb) mb->q_delta = ref_mb->q_delta;
00528 } else if (mb->cbp || (!band->plane && !band->band_num &&
00529 ctx->in_q)) {
00530 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00531 IVI_VLC_BITS, 1);
00532 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00533 }
00534
00535 if (!mb->type) {
00536 mb->mv_x = mb->mv_y = 0;
00537 } else {
00538 if (band->inherit_mv) {
00539
00540 if (mv_scale) {
00541 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00542 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00543 } else {
00544 mb->mv_x = ref_mb->mv_x;
00545 mb->mv_y = ref_mb->mv_y;
00546 }
00547 } else {
00548
00549 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00550 IVI_VLC_BITS, 1);
00551 mv_y += IVI_TOSIGNED(mv_delta);
00552 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00553 IVI_VLC_BITS, 1);
00554 mv_x += IVI_TOSIGNED(mv_delta);
00555 mb->mv_x = mv_x;
00556 mb->mv_y = mv_y;
00557 }
00558 }
00559 }
00560
00561 mb++;
00562 if (ref_mb)
00563 ref_mb++;
00564 mb_offset += band->mb_size;
00565 }
00566
00567 offs += row_offset;
00568 }
00569
00570 align_get_bits(&ctx->gb);
00571
00572 return 0;
00573 }
00574
00575
00584 static int decode_band(IVI4DecContext *ctx, int plane_num,
00585 IVIBandDesc *band, AVCodecContext *avctx)
00586 {
00587 int result, i, t, pos, idx1, idx2;
00588 IVITile *tile;
00589
00590 band->buf = band->bufs[ctx->dst_buf];
00591 band->ref_buf = band->bufs[ctx->ref_buf];
00592
00593 result = decode_band_hdr(ctx, band, avctx);
00594 if (result) {
00595 av_log(avctx, AV_LOG_ERROR, "Error decoding band header\n");
00596 return result;
00597 }
00598
00599 if (band->is_empty) {
00600 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
00601 return AVERROR_INVALIDDATA;
00602 }
00603
00604 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
00605
00606
00607 for (i = 0; i < band->num_corr; i++) {
00608 idx1 = band->corr[i * 2];
00609 idx2 = band->corr[i * 2 + 1];
00610 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
00611 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
00612 }
00613
00614 pos = get_bits_count(&ctx->gb);
00615
00616 for (t = 0; t < band->num_tiles; t++) {
00617 tile = &band->tiles[t];
00618
00619 tile->is_empty = get_bits1(&ctx->gb);
00620 if (tile->is_empty) {
00621 ff_ivi_process_empty_tile(avctx, band, tile,
00622 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
00623 av_dlog(avctx, "Empty tile encountered!\n");
00624 } else {
00625 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
00626 if (!tile->data_size) {
00627 av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
00628 return AVERROR_INVALIDDATA;
00629 }
00630
00631 result = decode_mb_info(ctx, band, tile, avctx);
00632 if (result < 0)
00633 break;
00634
00635 result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
00636 if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {
00637 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
00638 break;
00639 }
00640
00641 pos += tile->data_size << 3;
00642 }
00643 }
00644
00645
00646 for (i = band->num_corr - 1; i >= 0; i--) {
00647 idx1 = band->corr[i * 2];
00648 idx2 = band->corr[i * 2 + 1];
00649 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
00650 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
00651 }
00652
00653 #if defined(DEBUG) && IVI4_DEBUG_CHECKSUM
00654 if (band->checksum_present) {
00655 uint16_t chksum = ivi_calc_band_checksum(band);
00656 if (chksum != band->checksum) {
00657 av_log(avctx, AV_LOG_ERROR,
00658 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
00659 band->plane, band->band_num, band->checksum, chksum);
00660 }
00661 }
00662 #endif
00663
00664 align_get_bits(&ctx->gb);
00665
00666 return 0;
00667 }
00668
00669
00670 static av_cold int decode_init(AVCodecContext *avctx)
00671 {
00672 IVI4DecContext *ctx = avctx->priv_data;
00673
00674 ff_ivi_init_static_vlc();
00675
00676
00677 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00678
00679
00680
00681 ctx->pic_conf.pic_width = 0;
00682 ctx->pic_conf.pic_height = 0;
00683
00684 avctx->pix_fmt = PIX_FMT_YUV410P;
00685
00686 return 0;
00687 }
00688
00689
00695 static void switch_buffers(IVI4DecContext *ctx)
00696 {
00697 switch (ctx->prev_frame_type) {
00698 case FRAMETYPE_INTRA:
00699 case FRAMETYPE_INTER:
00700 ctx->buf_switch ^= 1;
00701 ctx->dst_buf = ctx->buf_switch;
00702 ctx->ref_buf = ctx->buf_switch ^ 1;
00703 break;
00704 case FRAMETYPE_INTER_NOREF:
00705 break;
00706 }
00707
00708 switch (ctx->frame_type) {
00709 case FRAMETYPE_INTRA:
00710 ctx->buf_switch = 0;
00711
00712 case FRAMETYPE_INTER:
00713 ctx->dst_buf = ctx->buf_switch;
00714 ctx->ref_buf = ctx->buf_switch ^ 1;
00715 break;
00716 case FRAMETYPE_INTER_NOREF:
00717 case FRAMETYPE_NULL_FIRST:
00718 case FRAMETYPE_NULL_LAST:
00719 break;
00720 }
00721 }
00722
00723
00724 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
00725 AVPacket *avpkt)
00726 {
00727 IVI4DecContext *ctx = avctx->priv_data;
00728 const uint8_t *buf = avpkt->data;
00729 int buf_size = avpkt->size;
00730 int result, p, b;
00731
00732 init_get_bits(&ctx->gb, buf, buf_size * 8);
00733
00734 result = decode_pic_hdr(ctx, avctx);
00735 if (result) {
00736 av_log(avctx, AV_LOG_ERROR, "Error decoding picture header\n");
00737 return result;
00738 }
00739
00740 switch_buffers(ctx);
00741
00742 if (ctx->frame_type < FRAMETYPE_NULL_FIRST) {
00743 for (p = 0; p < 3; p++) {
00744 for (b = 0; b < ctx->planes[p].num_bands; b++) {
00745 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
00746 if (result) {
00747 av_log(avctx, AV_LOG_ERROR,
00748 "Error decoding band: %d, plane: %d\n", b, p);
00749 return result;
00750 }
00751 }
00752 }
00753 }
00754
00755
00756
00757
00758 if (ctx->frame_type == FRAMETYPE_INTRA) {
00759 while (get_bits(&ctx->gb, 8));
00760 skip_bits_long(&ctx->gb, 64);
00761 if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)
00762 av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");
00763 }
00764
00765 if (ctx->frame.data[0])
00766 avctx->release_buffer(avctx, &ctx->frame);
00767
00768 ctx->frame.reference = 0;
00769 if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
00770 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00771 return result;
00772 }
00773
00774 if (ctx->is_scalable) {
00775 ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
00776 } else {
00777 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
00778 }
00779
00780 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
00781 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
00782
00783 *data_size = sizeof(AVFrame);
00784 *(AVFrame*)data = ctx->frame;
00785
00786 return buf_size;
00787 }
00788
00789
00790 static av_cold int decode_close(AVCodecContext *avctx)
00791 {
00792 IVI4DecContext *ctx = avctx->priv_data;
00793
00794 ff_ivi_free_buffers(&ctx->planes[0]);
00795
00796 if (ctx->frame.data[0])
00797 avctx->release_buffer(avctx, &ctx->frame);
00798
00799 #if IVI4_STREAM_ANALYSER
00800 if (ctx->is_scalable)
00801 av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");
00802 if (ctx->uses_tiling)
00803 av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");
00804 if (ctx->has_b_frames)
00805 av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");
00806 if (ctx->has_transp)
00807 av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");
00808 if (ctx->uses_haar)
00809 av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");
00810 if (ctx->uses_fullpel)
00811 av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");
00812 #endif
00813
00814 return 0;
00815 }
00816
00817
00818 AVCodec ff_indeo4_decoder = {
00819 .name = "indeo4",
00820 .type = AVMEDIA_TYPE_VIDEO,
00821 .id = CODEC_ID_INDEO4,
00822 .priv_data_size = sizeof(IVI4DecContext),
00823 .init = decode_init,
00824 .close = decode_close,
00825 .decode = decode_frame,
00826 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
00827 };