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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 "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
00060 static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
00061 {
00062 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
00063 int quant_mat, blk_size_changed = 0;
00064 IVIBandDesc *band, *band1, *band2;
00065 IVIPicConfig pic_conf;
00066
00067 ctx->gop_flags = get_bits(&ctx->gb, 8);
00068
00069 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
00070
00071 if (ctx->gop_flags & IVI5_IS_PROTECTED)
00072 ctx->lock_word = get_bits_long(&ctx->gb, 32);
00073
00074 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
00075 if (tile_size > 256) {
00076 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
00077 return AVERROR_INVALIDDATA;
00078 }
00079
00080
00081
00082 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
00083 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
00084 ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
00085 if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
00086 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
00087 pic_conf.luma_bands, pic_conf.chroma_bands);
00088 return AVERROR_INVALIDDATA;
00089 }
00090
00091 pic_size_indx = get_bits(&ctx->gb, 4);
00092 if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
00093 pic_conf.pic_height = get_bits(&ctx->gb, 13);
00094 pic_conf.pic_width = get_bits(&ctx->gb, 13);
00095 } else {
00096 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
00097 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
00098 }
00099
00100 if (ctx->gop_flags & 2) {
00101 av_log_missing_feature(avctx, "YV12 picture format", 0);
00102 return AVERROR_PATCHWELCOME;
00103 }
00104
00105 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
00106 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
00107
00108 if (!tile_size) {
00109 pic_conf.tile_height = pic_conf.pic_height;
00110 pic_conf.tile_width = pic_conf.pic_width;
00111 } else {
00112 pic_conf.tile_height = pic_conf.tile_width = tile_size;
00113 }
00114
00115
00116 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) {
00117 result = ff_ivi_init_planes(ctx->planes, &pic_conf);
00118 if (result < 0) {
00119 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
00120 return result;
00121 }
00122 ctx->pic_conf = pic_conf;
00123 blk_size_changed = 1;
00124 }
00125
00126 for (p = 0; p <= 1; p++) {
00127 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
00128 band = &ctx->planes[p].bands[i];
00129
00130 band->is_halfpel = get_bits1(&ctx->gb);
00131
00132 mb_size = get_bits1(&ctx->gb);
00133 blk_size = 8 >> get_bits1(&ctx->gb);
00134 mb_size = blk_size << !mb_size;
00135
00136 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
00137 if (blk_size_changed) {
00138 band->mb_size = mb_size;
00139 band->blk_size = blk_size;
00140 }
00141
00142 if (get_bits1(&ctx->gb)) {
00143 av_log_missing_feature(avctx, "Extended transform info", 0);
00144 return AVERROR_PATCHWELCOME;
00145 }
00146
00147
00148 switch ((p << 2) + i) {
00149 case 0:
00150 band->inv_transform = ff_ivi_inverse_slant_8x8;
00151 band->dc_transform = ff_ivi_dc_slant_2d;
00152 band->scan = ff_zigzag_direct;
00153 band->transform_size = 8;
00154 break;
00155
00156 case 1:
00157 band->inv_transform = ff_ivi_row_slant8;
00158 band->dc_transform = ff_ivi_dc_row_slant;
00159 band->scan = ff_ivi_vertical_scan_8x8;
00160 band->transform_size = 8;
00161 break;
00162
00163 case 2:
00164 band->inv_transform = ff_ivi_col_slant8;
00165 band->dc_transform = ff_ivi_dc_col_slant;
00166 band->scan = ff_ivi_horizontal_scan_8x8;
00167 band->transform_size = 8;
00168 break;
00169
00170 case 3:
00171 band->inv_transform = ff_ivi_put_pixels_8x8;
00172 band->dc_transform = ff_ivi_put_dc_pixel_8x8;
00173 band->scan = ff_ivi_horizontal_scan_8x8;
00174 band->transform_size = 8;
00175 break;
00176
00177 case 4:
00178 band->inv_transform = ff_ivi_inverse_slant_4x4;
00179 band->dc_transform = ff_ivi_dc_slant_2d;
00180 band->scan = ff_ivi_direct_scan_4x4;
00181 band->transform_size = 4;
00182 break;
00183 }
00184
00185 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
00186 band->inv_transform == ff_ivi_inverse_slant_4x4;
00187
00188 if (band->transform_size != band->blk_size)
00189 return AVERROR_INVALIDDATA;
00190
00191
00192 if (!p) {
00193 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
00194 } else {
00195 quant_mat = 5;
00196 }
00197
00198 if (band->blk_size == 8) {
00199 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
00200 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
00201 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
00202 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
00203 } else {
00204 band->intra_base = ivi5_base_quant_4x4_intra;
00205 band->inter_base = ivi5_base_quant_4x4_inter;
00206 band->intra_scale = ivi5_scale_quant_4x4_intra;
00207 band->inter_scale = ivi5_scale_quant_4x4_inter;
00208 }
00209
00210 if (get_bits(&ctx->gb, 2)) {
00211 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
00212 return AVERROR_INVALIDDATA;
00213 }
00214 }
00215 }
00216
00217
00218 for (i = 0; i < pic_conf.chroma_bands; i++) {
00219 band1 = &ctx->planes[1].bands[i];
00220 band2 = &ctx->planes[2].bands[i];
00221
00222 band2->width = band1->width;
00223 band2->height = band1->height;
00224 band2->mb_size = band1->mb_size;
00225 band2->blk_size = band1->blk_size;
00226 band2->is_halfpel = band1->is_halfpel;
00227 band2->intra_base = band1->intra_base;
00228 band2->inter_base = band1->inter_base;
00229 band2->intra_scale = band1->intra_scale;
00230 band2->inter_scale = band1->inter_scale;
00231 band2->scan = band1->scan;
00232 band2->inv_transform = band1->inv_transform;
00233 band2->dc_transform = band1->dc_transform;
00234 band2->is_2d_trans = band1->is_2d_trans;
00235 }
00236
00237
00238 if (blk_size_changed) {
00239 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
00240 pic_conf.tile_height);
00241 if (result < 0) {
00242 av_log(avctx, AV_LOG_ERROR,
00243 "Couldn't reallocate internal structures!\n");
00244 return result;
00245 }
00246 }
00247
00248 if (ctx->gop_flags & 8) {
00249 if (get_bits(&ctx->gb, 3)) {
00250 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
00251 return AVERROR_INVALIDDATA;
00252 }
00253
00254 if (get_bits1(&ctx->gb))
00255 skip_bits_long(&ctx->gb, 24);
00256 }
00257
00258 align_get_bits(&ctx->gb);
00259
00260 skip_bits(&ctx->gb, 23);
00261
00262
00263 if (get_bits1(&ctx->gb)) {
00264 do {
00265 i = get_bits(&ctx->gb, 16);
00266 } while (i & 0x8000);
00267 }
00268
00269 align_get_bits(&ctx->gb);
00270
00271 return 0;
00272 }
00273
00274
00280 static inline void skip_hdr_extension(GetBitContext *gb)
00281 {
00282 int i, len;
00283
00284 do {
00285 len = get_bits(gb, 8);
00286 for (i = 0; i < len; i++) skip_bits(gb, 8);
00287 } while(len);
00288 }
00289
00290
00298 static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
00299 {
00300 int ret;
00301
00302 if (get_bits(&ctx->gb, 5) != 0x1F) {
00303 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
00304 return AVERROR_INVALIDDATA;
00305 }
00306
00307 ctx->prev_frame_type = ctx->frame_type;
00308 ctx->frame_type = get_bits(&ctx->gb, 3);
00309 if (ctx->frame_type >= 5) {
00310 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
00311 return AVERROR_INVALIDDATA;
00312 }
00313
00314 ctx->frame_num = get_bits(&ctx->gb, 8);
00315
00316 if (ctx->frame_type == FRAMETYPE_INTRA) {
00317 if ((ret = decode_gop_header(ctx, avctx)) < 0) {
00318 av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
00319 ctx->gop_invalid = 1;
00320 return ret;
00321 }
00322 ctx->gop_invalid = 0;
00323 }
00324
00325 if (ctx->frame_type != FRAMETYPE_NULL) {
00326 ctx->frame_flags = get_bits(&ctx->gb, 8);
00327
00328 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
00329
00330 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
00331
00332
00333 if (ctx->frame_flags & 0x20)
00334 skip_hdr_extension(&ctx->gb);
00335
00336
00337 ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
00338 IVI_MB_HUFF, &ctx->mb_vlc, avctx);
00339 if (ret < 0)
00340 return ret;
00341
00342 skip_bits(&ctx->gb, 3);
00343 }
00344
00345 align_get_bits(&ctx->gb);
00346
00347 return 0;
00348 }
00349
00350
00359 static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
00360 AVCodecContext *avctx)
00361 {
00362 int i, ret;
00363 uint8_t band_flags;
00364
00365 band_flags = get_bits(&ctx->gb, 8);
00366
00367 if (band_flags & 1) {
00368 band->is_empty = 1;
00369 return 0;
00370 }
00371
00372 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
00373
00374 band->inherit_mv = band_flags & 2;
00375 band->inherit_qdelta = band_flags & 8;
00376 band->qdelta_present = band_flags & 4;
00377 if (!band->qdelta_present) band->inherit_qdelta = 1;
00378
00379
00380 band->num_corr = 0;
00381 if (band_flags & 0x10) {
00382 band->num_corr = get_bits(&ctx->gb, 8);
00383 if (band->num_corr > 61) {
00384 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
00385 band->num_corr);
00386 return AVERROR_INVALIDDATA;
00387 }
00388
00389
00390 for (i = 0; i < band->num_corr * 2; i++)
00391 band->corr[i] = get_bits(&ctx->gb, 8);
00392 }
00393
00394
00395 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
00396
00397
00398 ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
00399 &band->blk_vlc, avctx);
00400 if (ret < 0)
00401 return ret;
00402
00403 band->checksum_present = get_bits1(&ctx->gb);
00404 if (band->checksum_present)
00405 band->checksum = get_bits(&ctx->gb, 16);
00406
00407 band->glob_quant = get_bits(&ctx->gb, 5);
00408
00409
00410 if (band_flags & 0x20) {
00411 align_get_bits(&ctx->gb);
00412 skip_hdr_extension(&ctx->gb);
00413 }
00414
00415 align_get_bits(&ctx->gb);
00416
00417 return 0;
00418 }
00419
00420
00431 static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
00432 IVITile *tile, AVCodecContext *avctx)
00433 {
00434 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
00435 mv_scale, blks_per_mb;
00436 IVIMbInfo *mb, *ref_mb;
00437 int row_offset = band->mb_size * band->pitch;
00438
00439 mb = tile->mbs;
00440 ref_mb = tile->ref_mbs;
00441 offs = tile->ypos * band->pitch + tile->xpos;
00442
00443 if (!ref_mb &&
00444 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
00445 return AVERROR_INVALIDDATA;
00446
00447 if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
00448 av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
00449 tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
00450 return AVERROR_INVALIDDATA;
00451 }
00452
00453
00454 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
00455 mv_x = mv_y = 0;
00456
00457 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
00458 mb_offset = offs;
00459
00460 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
00461 mb->xpos = x;
00462 mb->ypos = y;
00463 mb->buf_offs = mb_offset;
00464
00465 if (get_bits1(&ctx->gb)) {
00466 if (ctx->frame_type == FRAMETYPE_INTRA) {
00467 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
00468 return AVERROR_INVALIDDATA;
00469 }
00470 mb->type = 1;
00471 mb->cbp = 0;
00472
00473 mb->q_delta = 0;
00474 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
00475 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00476 IVI_VLC_BITS, 1);
00477 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00478 }
00479
00480 mb->mv_x = mb->mv_y = 0;
00481 if (band->inherit_mv){
00482
00483 if (mv_scale) {
00484 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00485 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00486 } else {
00487 mb->mv_x = ref_mb->mv_x;
00488 mb->mv_y = ref_mb->mv_y;
00489 }
00490 }
00491 } else {
00492 if (band->inherit_mv) {
00493 mb->type = ref_mb->type;
00494 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
00495 mb->type = 0;
00496 } else {
00497 mb->type = get_bits1(&ctx->gb);
00498 }
00499
00500 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
00501 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
00502
00503 mb->q_delta = 0;
00504 if (band->qdelta_present) {
00505 if (band->inherit_qdelta) {
00506 if (ref_mb) mb->q_delta = ref_mb->q_delta;
00507 } else if (mb->cbp || (!band->plane && !band->band_num &&
00508 (ctx->frame_flags & 8))) {
00509 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00510 IVI_VLC_BITS, 1);
00511 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00512 }
00513 }
00514
00515 if (!mb->type) {
00516 mb->mv_x = mb->mv_y = 0;
00517 } else {
00518 if (band->inherit_mv){
00519
00520 if (mv_scale) {
00521 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00522 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00523 } else {
00524 mb->mv_x = ref_mb->mv_x;
00525 mb->mv_y = ref_mb->mv_y;
00526 }
00527 } else {
00528
00529 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00530 IVI_VLC_BITS, 1);
00531 mv_y += IVI_TOSIGNED(mv_delta);
00532 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00533 IVI_VLC_BITS, 1);
00534 mv_x += IVI_TOSIGNED(mv_delta);
00535 mb->mv_x = mv_x;
00536 mb->mv_y = mv_y;
00537 }
00538 }
00539 }
00540
00541 mb++;
00542 if (ref_mb)
00543 ref_mb++;
00544 mb_offset += band->mb_size;
00545 }
00546
00547 offs += row_offset;
00548 }
00549
00550 align_get_bits(&ctx->gb);
00551
00552 return 0;
00553 }
00554
00555
00561 static void switch_buffers(IVI45DecContext *ctx)
00562 {
00563 switch (ctx->prev_frame_type) {
00564 case FRAMETYPE_INTRA:
00565 case FRAMETYPE_INTER:
00566 ctx->buf_switch ^= 1;
00567 ctx->dst_buf = ctx->buf_switch;
00568 ctx->ref_buf = ctx->buf_switch ^ 1;
00569 break;
00570 case FRAMETYPE_INTER_SCAL:
00571 if (!ctx->inter_scal) {
00572 ctx->ref2_buf = 2;
00573 ctx->inter_scal = 1;
00574 }
00575 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
00576 ctx->ref_buf = ctx->ref2_buf;
00577 break;
00578 case FRAMETYPE_INTER_NOREF:
00579 break;
00580 }
00581
00582 switch (ctx->frame_type) {
00583 case FRAMETYPE_INTRA:
00584 ctx->buf_switch = 0;
00585
00586 case FRAMETYPE_INTER:
00587 ctx->inter_scal = 0;
00588 ctx->dst_buf = ctx->buf_switch;
00589 ctx->ref_buf = ctx->buf_switch ^ 1;
00590 break;
00591 case FRAMETYPE_INTER_SCAL:
00592 case FRAMETYPE_INTER_NOREF:
00593 case FRAMETYPE_NULL:
00594 break;
00595 }
00596 }
00597
00598
00599 static int is_nonnull_frame(IVI45DecContext *ctx)
00600 {
00601 return ctx->frame_type != FRAMETYPE_NULL;
00602 }
00603
00604
00608 static av_cold int decode_init(AVCodecContext *avctx)
00609 {
00610 IVI45DecContext *ctx = avctx->priv_data;
00611 int result;
00612
00613 ff_ivi_init_static_vlc();
00614
00615
00616 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00617
00618
00619
00620
00621 ctx->pic_conf.pic_width = avctx->width;
00622 ctx->pic_conf.pic_height = avctx->height;
00623 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
00624 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
00625 ctx->pic_conf.tile_width = avctx->width;
00626 ctx->pic_conf.tile_height = avctx->height;
00627 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
00628
00629 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
00630 if (result) {
00631 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
00632 return AVERROR_INVALIDDATA;
00633 }
00634
00635 ctx->buf_switch = 0;
00636 ctx->inter_scal = 0;
00637
00638 ctx->decode_pic_hdr = decode_pic_hdr;
00639 ctx->decode_band_hdr = decode_band_hdr;
00640 ctx->decode_mb_info = decode_mb_info;
00641 ctx->switch_buffers = switch_buffers;
00642 ctx->is_nonnull_frame = is_nonnull_frame;
00643
00644 avctx->pix_fmt = PIX_FMT_YUV410P;
00645
00646 return 0;
00647 }
00648
00649
00650 AVCodec ff_indeo5_decoder = {
00651 .name = "indeo5",
00652 .type = AVMEDIA_TYPE_VIDEO,
00653 .id = CODEC_ID_INDEO5,
00654 .priv_data_size = sizeof(IVI45DecContext),
00655 .init = decode_init,
00656 .close = ff_ivi_decode_close,
00657 .decode = ff_ivi_decode_frame,
00658 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
00659 };