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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
00041 enum {
00042 FRAMETYPE_INTRA = 0,
00043 FRAMETYPE_BIDIR1 = 1,
00044 FRAMETYPE_INTER = 2,
00045 FRAMETYPE_BIDIR = 3,
00046 FRAMETYPE_INTER_NOREF = 4,
00047 FRAMETYPE_NULL_FIRST = 5,
00048 FRAMETYPE_NULL_LAST = 6
00049 };
00050
00051 #define IVI4_PIC_SIZE_ESC 7
00052
00053
00054 static const struct {
00055 InvTransformPtr *inv_trans;
00056 DCTransformPtr *dc_trans;
00057 int is_2d_trans;
00058 } transforms[18] = {
00059 { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 },
00060 { NULL, NULL, 0 },
00061 { NULL, NULL, 0 },
00062 { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 },
00063 { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 },
00064 { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 },
00065 { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 },
00066 { NULL, NULL, 0 },
00067 { NULL, NULL, 0 },
00068 { NULL, NULL, 0 },
00069 { NULL, NULL, 0 },
00070 { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 },
00071 { NULL, NULL, 0 },
00072 { NULL, NULL, 0 },
00073 { NULL, NULL, 0 },
00074 { NULL, NULL, 0 },
00075 { NULL, NULL, 0 },
00076 { NULL, NULL, 0 },
00077 };
00078
00089 static int decode_plane_subdivision(GetBitContext *gb)
00090 {
00091 int i;
00092
00093 switch (get_bits(gb, 2)) {
00094 case 3:
00095 return 1;
00096 case 2:
00097 for (i = 0; i < 4; i++)
00098 if (get_bits(gb, 2) != 3)
00099 return 0;
00100 return 4;
00101 default:
00102 return 0;
00103 }
00104 }
00105
00106 static inline int scale_tile_size(int def_size, int size_factor)
00107 {
00108 return size_factor == 15 ? def_size : (size_factor + 1) << 5;
00109 }
00110
00118 static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
00119 {
00120 int pic_size_indx, i, p;
00121 IVIPicConfig pic_conf;
00122
00123 if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
00124 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
00125 return AVERROR_INVALIDDATA;
00126 }
00127
00128 ctx->prev_frame_type = ctx->frame_type;
00129 ctx->frame_type = get_bits(&ctx->gb, 3);
00130 if (ctx->frame_type == 7) {
00131 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
00132 return AVERROR_INVALIDDATA;
00133 }
00134
00135 #if IVI4_STREAM_ANALYSER
00136 if ( ctx->frame_type == FRAMETYPE_BIDIR1
00137 || ctx->frame_type == FRAMETYPE_BIDIR)
00138 ctx->has_b_frames = 1;
00139 #endif
00140
00141 ctx->transp_status = get_bits1(&ctx->gb);
00142 #if IVI4_STREAM_ANALYSER
00143 if (ctx->transp_status) {
00144 ctx->has_transp = 1;
00145 }
00146 #endif
00147
00148
00149 if (get_bits1(&ctx->gb)) {
00150 av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
00151 return AVERROR_INVALIDDATA;
00152 }
00153
00154 ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
00155
00156
00157 if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) {
00158 av_dlog(avctx, "Null frame encountered!\n");
00159 return 0;
00160 }
00161
00162
00163
00164
00165 if (get_bits1(&ctx->gb)) {
00166 skip_bits_long(&ctx->gb, 32);
00167 av_dlog(avctx, "Password-protected clip!\n");
00168 }
00169
00170 pic_size_indx = get_bits(&ctx->gb, 3);
00171 if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
00172 pic_conf.pic_height = get_bits(&ctx->gb, 16);
00173 pic_conf.pic_width = get_bits(&ctx->gb, 16);
00174 } else {
00175 pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
00176 pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ];
00177 }
00178
00179
00180 if (get_bits1(&ctx->gb)) {
00181 pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
00182 pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4));
00183 #if IVI4_STREAM_ANALYSER
00184 ctx->uses_tiling = 1;
00185 #endif
00186 } else {
00187 pic_conf.tile_height = pic_conf.pic_height;
00188 pic_conf.tile_width = pic_conf.pic_width;
00189 }
00190
00191
00192 if (get_bits(&ctx->gb, 2)) {
00193 av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
00194 return AVERROR_INVALIDDATA;
00195 }
00196 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
00197 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
00198
00199
00200 pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
00201 if (pic_conf.luma_bands)
00202 pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
00203 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
00204 if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
00205 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
00206 pic_conf.luma_bands, pic_conf.chroma_bands);
00207 return AVERROR_INVALIDDATA;
00208 }
00209
00210
00211 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
00212 if (ff_ivi_init_planes(ctx->planes, &pic_conf)) {
00213 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
00214 return AVERROR(ENOMEM);
00215 }
00216
00217 ctx->pic_conf = pic_conf;
00218
00219
00220 for (p = 0; p <= 2; p++) {
00221 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
00222 ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
00223 ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
00224 }
00225 }
00226
00227 if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width,
00228 ctx->pic_conf.tile_height)) {
00229 av_log(avctx, AV_LOG_ERROR,
00230 "Couldn't reallocate internal structures!\n");
00231 return AVERROR(ENOMEM);
00232 }
00233 }
00234
00235 ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
00236
00237
00238 if (get_bits1(&ctx->gb))
00239 skip_bits(&ctx->gb, 8);
00240
00241
00242 if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) ||
00243 ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
00244 return AVERROR_INVALIDDATA;
00245
00246 ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
00247
00248 ctx->in_imf = get_bits1(&ctx->gb);
00249 ctx->in_q = get_bits1(&ctx->gb);
00250
00251 ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
00252
00253
00254 ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
00255
00256 ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
00257
00258
00259 while (get_bits1(&ctx->gb)) {
00260 av_dlog(avctx, "Pic hdr extension encountered!\n");
00261 skip_bits(&ctx->gb, 8);
00262 }
00263
00264 if (get_bits1(&ctx->gb)) {
00265 av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
00266 }
00267
00268 align_get_bits(&ctx->gb);
00269
00270 return 0;
00271 }
00272
00273
00282 static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
00283 AVCodecContext *avctx)
00284 {
00285 int plane, band_num, indx, transform_id, scan_indx;
00286 int i;
00287
00288 plane = get_bits(&ctx->gb, 2);
00289 band_num = get_bits(&ctx->gb, 4);
00290 if (band->plane != plane || band->band_num != band_num) {
00291 av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
00292 return AVERROR_INVALIDDATA;
00293 }
00294
00295 band->is_empty = get_bits1(&ctx->gb);
00296 if (!band->is_empty) {
00297
00298
00299 if (get_bits1(&ctx->gb))
00300 skip_bits(&ctx->gb, 16);
00301
00302 band->is_halfpel = get_bits(&ctx->gb, 2);
00303 if (band->is_halfpel >= 2) {
00304 av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n",
00305 band->is_halfpel);
00306 return AVERROR_INVALIDDATA;
00307 }
00308 #if IVI4_STREAM_ANALYSER
00309 if (!band->is_halfpel)
00310 ctx->uses_fullpel = 1;
00311 #endif
00312
00313 band->checksum_present = get_bits1(&ctx->gb);
00314 if (band->checksum_present)
00315 band->checksum = get_bits(&ctx->gb, 16);
00316
00317 indx = get_bits(&ctx->gb, 2);
00318 if (indx == 3) {
00319 av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n");
00320 return AVERROR_INVALIDDATA;
00321 }
00322 band->mb_size = 16 >> indx;
00323 band->blk_size = 8 >> (indx >> 1);
00324
00325 band->inherit_mv = get_bits1(&ctx->gb);
00326 band->inherit_qdelta = get_bits1(&ctx->gb);
00327
00328 band->glob_quant = get_bits(&ctx->gb, 5);
00329
00330 if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) {
00331 transform_id = get_bits(&ctx->gb, 5);
00332 if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
00333 !transforms[transform_id].inv_trans) {
00334 av_log_ask_for_sample(avctx, "Unimplemented transform: %d!\n", transform_id);
00335 return AVERROR_PATCHWELCOME;
00336 }
00337 if ((transform_id >= 7 && transform_id <= 9) ||
00338 transform_id == 17) {
00339 av_log_ask_for_sample(avctx, "DCT transform not supported yet!\n");
00340 return AVERROR_PATCHWELCOME;
00341 }
00342
00343 #if IVI4_STREAM_ANALYSER
00344 if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10)
00345 ctx->uses_haar = 1;
00346 #endif
00347
00348 band->inv_transform = transforms[transform_id].inv_trans;
00349 band->dc_transform = transforms[transform_id].dc_trans;
00350 band->is_2d_trans = transforms[transform_id].is_2d_trans;
00351
00352 scan_indx = get_bits(&ctx->gb, 4);
00353 if (scan_indx == 15) {
00354 av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
00355 return AVERROR_INVALIDDATA;
00356 }
00357 band->scan = scan_index_to_tab[scan_indx];
00358
00359 band->quant_mat = get_bits(&ctx->gb, 5);
00360 if (band->quant_mat == 31) {
00361 av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
00362 return AVERROR_INVALIDDATA;
00363 }
00364 }
00365
00366
00367 if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF,
00368 &band->blk_vlc, avctx))
00369 return AVERROR_INVALIDDATA;
00370
00371
00372 band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
00373
00374
00375 band->num_corr = 0;
00376 if (get_bits1(&ctx->gb)) {
00377 band->num_corr = get_bits(&ctx->gb, 8);
00378 if (band->num_corr > 61) {
00379 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
00380 band->num_corr);
00381 return AVERROR_INVALIDDATA;
00382 }
00383
00384
00385 for (i = 0; i < band->num_corr * 2; i++)
00386 band->corr[i] = get_bits(&ctx->gb, 8);
00387 }
00388 }
00389
00390 if (band->blk_size == 8) {
00391 band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0];
00392 band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0];
00393 } else {
00394 band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0];
00395 band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0];
00396 }
00397
00398
00399 band->intra_scale = NULL;
00400 band->inter_scale = NULL;
00401
00402 align_get_bits(&ctx->gb);
00403
00404 return 0;
00405 }
00406
00407
00418 static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
00419 IVITile *tile, AVCodecContext *avctx)
00420 {
00421 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
00422 mv_scale, mb_type_bits;
00423 IVIMbInfo *mb, *ref_mb;
00424 int row_offset = band->mb_size * band->pitch;
00425
00426 mb = tile->mbs;
00427 ref_mb = tile->ref_mbs;
00428 offs = tile->ypos * band->pitch + tile->xpos;
00429
00430 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
00431 mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1;
00432
00433
00434 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
00435 mv_x = mv_y = 0;
00436
00437 for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
00438 mb_offset = offs;
00439
00440 for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) {
00441 mb->xpos = x;
00442 mb->ypos = y;
00443 mb->buf_offs = mb_offset;
00444
00445 if (get_bits1(&ctx->gb)) {
00446 if (ctx->frame_type == FRAMETYPE_INTRA) {
00447 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
00448 return AVERROR_INVALIDDATA;
00449 }
00450 mb->type = 1;
00451 mb->cbp = 0;
00452
00453 mb->q_delta = 0;
00454 if (!band->plane && !band->band_num && ctx->in_q) {
00455 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00456 IVI_VLC_BITS, 1);
00457 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00458 }
00459
00460 mb->mv_x = mb->mv_y = 0;
00461 if (band->inherit_mv) {
00462
00463 if (mv_scale) {
00464 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00465 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00466 } else {
00467 mb->mv_x = ref_mb->mv_x;
00468 mb->mv_y = ref_mb->mv_y;
00469 }
00470 }
00471 } else {
00472 if (band->inherit_mv) {
00473 mb->type = ref_mb->type;
00474 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
00475 mb->type = 0;
00476 } else {
00477 mb->type = get_bits(&ctx->gb, mb_type_bits);
00478 }
00479
00480 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
00481
00482 mb->q_delta = 0;
00483 if (band->inherit_qdelta) {
00484 if (ref_mb) mb->q_delta = ref_mb->q_delta;
00485 } else if (mb->cbp || (!band->plane && !band->band_num &&
00486 ctx->in_q)) {
00487 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00488 IVI_VLC_BITS, 1);
00489 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00490 }
00491
00492 if (!mb->type) {
00493 mb->mv_x = mb->mv_y = 0;
00494 } else {
00495 if (band->inherit_mv) {
00496
00497 if (mv_scale) {
00498 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00499 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00500 } else {
00501 mb->mv_x = ref_mb->mv_x;
00502 mb->mv_y = ref_mb->mv_y;
00503 }
00504 } else {
00505
00506 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00507 IVI_VLC_BITS, 1);
00508 mv_y += IVI_TOSIGNED(mv_delta);
00509 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00510 IVI_VLC_BITS, 1);
00511 mv_x += IVI_TOSIGNED(mv_delta);
00512 mb->mv_x = mv_x;
00513 mb->mv_y = mv_y;
00514 }
00515 }
00516 }
00517
00518 mb++;
00519 if (ref_mb)
00520 ref_mb++;
00521 mb_offset += band->mb_size;
00522 }
00523
00524 offs += row_offset;
00525 }
00526
00527 align_get_bits(&ctx->gb);
00528
00529 return 0;
00530 }
00531
00532
00538 static void switch_buffers(IVI45DecContext *ctx)
00539 {
00540 switch (ctx->prev_frame_type) {
00541 case FRAMETYPE_INTRA:
00542 case FRAMETYPE_INTER:
00543 ctx->buf_switch ^= 1;
00544 ctx->dst_buf = ctx->buf_switch;
00545 ctx->ref_buf = ctx->buf_switch ^ 1;
00546 break;
00547 case FRAMETYPE_INTER_NOREF:
00548 break;
00549 }
00550
00551 switch (ctx->frame_type) {
00552 case FRAMETYPE_INTRA:
00553 ctx->buf_switch = 0;
00554
00555 case FRAMETYPE_INTER:
00556 ctx->dst_buf = ctx->buf_switch;
00557 ctx->ref_buf = ctx->buf_switch ^ 1;
00558 break;
00559 case FRAMETYPE_INTER_NOREF:
00560 case FRAMETYPE_NULL_FIRST:
00561 case FRAMETYPE_NULL_LAST:
00562 break;
00563 }
00564 }
00565
00566
00567 static int is_nonnull_frame(IVI45DecContext *ctx)
00568 {
00569 return ctx->frame_type < FRAMETYPE_NULL_FIRST;
00570 }
00571
00572
00573 static av_cold int decode_init(AVCodecContext *avctx)
00574 {
00575 IVI45DecContext *ctx = avctx->priv_data;
00576
00577 ff_ivi_init_static_vlc();
00578
00579
00580 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00581
00582
00583
00584 ctx->pic_conf.pic_width = 0;
00585 ctx->pic_conf.pic_height = 0;
00586
00587 avctx->pix_fmt = PIX_FMT_YUV410P;
00588
00589 ctx->decode_pic_hdr = decode_pic_hdr;
00590 ctx->decode_band_hdr = decode_band_hdr;
00591 ctx->decode_mb_info = decode_mb_info;
00592 ctx->switch_buffers = switch_buffers;
00593 ctx->is_nonnull_frame = is_nonnull_frame;
00594
00595 return 0;
00596 }
00597
00598
00599 AVCodec ff_indeo4_decoder = {
00600 .name = "indeo4",
00601 .type = AVMEDIA_TYPE_VIDEO,
00602 .id = CODEC_ID_INDEO4,
00603 .priv_data_size = sizeof(IVI45DecContext),
00604 .init = decode_init,
00605 .close = ff_ivi_decode_close,
00606 .decode = ff_ivi_decode_frame,
00607 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
00608 };