00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
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
00114
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
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;
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
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
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 if(quant_mat >= 5){
00225 av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
00226 return -1;
00227 }
00228 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
00229 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
00230 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
00231 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
00232 } else {
00233 band->intra_base = ivi5_base_quant_4x4_intra;
00234 band->inter_base = ivi5_base_quant_4x4_inter;
00235 band->intra_scale = ivi5_scale_quant_4x4_intra;
00236 band->inter_scale = ivi5_scale_quant_4x4_inter;
00237 }
00238
00239 if (get_bits(&ctx->gb, 2)) {
00240 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
00241 return -1;
00242 }
00243 }
00244 }
00245
00246
00247 for (i = 0; i < pic_conf.chroma_bands; i++) {
00248 band1 = &ctx->planes[1].bands[i];
00249 band2 = &ctx->planes[2].bands[i];
00250
00251 band2->width = band1->width;
00252 band2->height = band1->height;
00253 band2->mb_size = band1->mb_size;
00254 band2->blk_size = band1->blk_size;
00255 band2->is_halfpel = band1->is_halfpel;
00256 band2->intra_base = band1->intra_base;
00257 band2->inter_base = band1->inter_base;
00258 band2->intra_scale = band1->intra_scale;
00259 band2->inter_scale = band1->inter_scale;
00260 band2->scan = band1->scan;
00261 band2->inv_transform = band1->inv_transform;
00262 band2->dc_transform = band1->dc_transform;
00263 band2->is_2d_trans = band1->is_2d_trans;
00264 }
00265
00266
00267 if (blk_size_changed) {
00268 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
00269 pic_conf.tile_height);
00270 if (result) {
00271 av_log(avctx, AV_LOG_ERROR,
00272 "Couldn't reallocate internal structures!\n");
00273 return -1;
00274 }
00275 }
00276
00277 if (ctx->gop_flags & 8) {
00278 if (get_bits(&ctx->gb, 3)) {
00279 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
00280 return -1;
00281 }
00282
00283 if (get_bits1(&ctx->gb))
00284 skip_bits_long(&ctx->gb, 24);
00285 }
00286
00287 align_get_bits(&ctx->gb);
00288
00289 skip_bits(&ctx->gb, 23);
00290
00291
00292 if (get_bits1(&ctx->gb)) {
00293 do {
00294 i = get_bits(&ctx->gb, 16);
00295 } while (i & 0x8000);
00296 }
00297
00298 align_get_bits(&ctx->gb);
00299
00300 return 0;
00301 }
00302
00303
00309 static inline void skip_hdr_extension(GetBitContext *gb)
00310 {
00311 int i, len;
00312
00313 do {
00314 len = get_bits(gb, 8);
00315 for (i = 0; i < len; i++) skip_bits(gb, 8);
00316 } while(len);
00317 }
00318
00319
00327 static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
00328 {
00329 if (get_bits(&ctx->gb, 5) != 0x1F) {
00330 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
00331 return -1;
00332 }
00333
00334 ctx->prev_frame_type = ctx->frame_type;
00335 ctx->frame_type = get_bits(&ctx->gb, 3);
00336 if (ctx->frame_type >= 5) {
00337 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
00338 return -1;
00339 }
00340
00341 ctx->frame_num = get_bits(&ctx->gb, 8);
00342
00343 if (ctx->frame_type == FRAMETYPE_INTRA) {
00344 ctx->gop_invalid = 1;
00345 if (decode_gop_header(ctx, avctx)) {
00346 av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
00347 return AVERROR_INVALIDDATA;
00348 }
00349 ctx->gop_invalid = 0;
00350 }
00351
00352 if (ctx->frame_type != FRAMETYPE_NULL) {
00353 ctx->frame_flags = get_bits(&ctx->gb, 8);
00354
00355 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
00356
00357 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
00358
00359
00360 if (ctx->frame_flags & 0x20)
00361 skip_hdr_extension(&ctx->gb);
00362
00363
00364 if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
00365 return -1;
00366
00367 skip_bits(&ctx->gb, 3);
00368 }
00369
00370 align_get_bits(&ctx->gb);
00371
00372 return 0;
00373 }
00374
00375
00384 static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
00385 AVCodecContext *avctx)
00386 {
00387 int i;
00388 uint8_t band_flags;
00389
00390 band_flags = get_bits(&ctx->gb, 8);
00391
00392 if (band_flags & 1) {
00393 band->is_empty = 1;
00394 return 0;
00395 }
00396
00397 band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
00398
00399 band->inherit_mv = band_flags & 2;
00400 band->inherit_qdelta = band_flags & 8;
00401 band->qdelta_present = band_flags & 4;
00402 if (!band->qdelta_present) band->inherit_qdelta = 1;
00403
00404
00405 band->num_corr = 0;
00406 if (band_flags & 0x10) {
00407 band->num_corr = get_bits(&ctx->gb, 8);
00408 if (band->num_corr > 61) {
00409 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
00410 band->num_corr);
00411 return -1;
00412 }
00413
00414
00415 for (i = 0; i < band->num_corr * 2; i++)
00416 band->corr[i] = get_bits(&ctx->gb, 8);
00417 }
00418
00419
00420 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
00421
00422
00423 if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
00424 return -1;
00425
00426 band->checksum_present = get_bits1(&ctx->gb);
00427 if (band->checksum_present)
00428 band->checksum = get_bits(&ctx->gb, 16);
00429
00430 band->glob_quant = get_bits(&ctx->gb, 5);
00431
00432
00433 if (band_flags & 0x20) {
00434 align_get_bits(&ctx->gb);
00435 skip_hdr_extension(&ctx->gb);
00436 }
00437
00438 align_get_bits(&ctx->gb);
00439
00440 return 0;
00441 }
00442
00443
00454 static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
00455 IVITile *tile, AVCodecContext *avctx)
00456 {
00457 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
00458 mv_scale, blks_per_mb;
00459 IVIMbInfo *mb, *ref_mb;
00460 int row_offset = band->mb_size * band->pitch;
00461
00462 mb = tile->mbs;
00463 ref_mb = tile->ref_mbs;
00464 offs = tile->ypos * band->pitch + tile->xpos;
00465
00466 if (!ref_mb &&
00467 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
00468 return AVERROR_INVALIDDATA;
00469
00470 if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
00471 av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
00472 tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
00473 return AVERROR_INVALIDDATA;
00474 }
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 -1;
00492 }
00493 mb->type = 1;
00494 mb->cbp = 0;
00495
00496 mb->q_delta = 0;
00497 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
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_bits1(&ctx->gb);
00521 }
00522
00523 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
00524 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
00525
00526 mb->q_delta = 0;
00527 if (band->qdelta_present) {
00528 if (band->inherit_qdelta) {
00529 if (ref_mb) mb->q_delta = ref_mb->q_delta;
00530 } else if (mb->cbp || (!band->plane && !band->band_num &&
00531 (ctx->frame_flags & 8))) {
00532 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00533 IVI_VLC_BITS, 1);
00534 mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00535 }
00536 }
00537
00538 if (!mb->type) {
00539 mb->mv_x = mb->mv_y = 0;
00540 } else {
00541 if (band->inherit_mv){
00542
00543 if (mv_scale) {
00544 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00545 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00546 } else {
00547 mb->mv_x = ref_mb->mv_x;
00548 mb->mv_y = ref_mb->mv_y;
00549 }
00550 } else {
00551
00552 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00553 IVI_VLC_BITS, 1);
00554 mv_y += IVI_TOSIGNED(mv_delta);
00555 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00556 IVI_VLC_BITS, 1);
00557 mv_x += IVI_TOSIGNED(mv_delta);
00558 mb->mv_x = mv_x;
00559 mb->mv_y = mv_y;
00560 }
00561 }
00562 }
00563
00564 mb++;
00565 if (ref_mb)
00566 ref_mb++;
00567 mb_offset += band->mb_size;
00568 }
00569
00570 offs += row_offset;
00571 }
00572
00573 align_get_bits(&ctx->gb);
00574
00575 return 0;
00576 }
00577
00578
00587 static int decode_band(IVI5DecContext *ctx, int plane_num,
00588 IVIBandDesc *band, AVCodecContext *avctx)
00589 {
00590 int result, i, t, idx1, idx2, pos;
00591 IVITile *tile;
00592
00593 band->buf = band->bufs[ctx->dst_buf];
00594 band->ref_buf = band->bufs[ctx->ref_buf];
00595 band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
00596
00597 result = decode_band_hdr(ctx, band, avctx);
00598 if (result) {
00599 av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
00600 result);
00601 return -1;
00602 }
00603
00604 if (band->is_empty) {
00605 av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
00606 return -1;
00607 }
00608
00609 band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
00610
00611
00612 for (i = 0; i < band->num_corr; i++) {
00613 idx1 = band->corr[i*2];
00614 idx2 = band->corr[i*2+1];
00615 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
00616 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
00617 }
00618
00619 pos = get_bits_count(&ctx->gb);
00620
00621 for (t = 0; t < band->num_tiles; t++) {
00622 tile = &band->tiles[t];
00623
00624 tile->is_empty = get_bits1(&ctx->gb);
00625 if (tile->is_empty) {
00626 result = ff_ivi_process_empty_tile(avctx, band, tile,
00627 (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
00628 if (result < 0)
00629 break;
00630 } else {
00631 tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
00632
00633 result = decode_mb_info(ctx, band, tile, avctx);
00634 if (result < 0)
00635 break;
00636
00637 result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
00638 if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
00639 av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
00640 break;
00641 }
00642 pos += tile->data_size << 3;
00643 }
00644 }
00645
00646
00647 for (i = band->num_corr-1; i >= 0; i--) {
00648 idx1 = band->corr[i*2];
00649 idx2 = band->corr[i*2+1];
00650 FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
00651 FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
00652 }
00653
00654 #ifdef DEBUG
00655 if (band->checksum_present) {
00656 uint16_t chksum = ivi_calc_band_checksum(band);
00657 if (chksum != band->checksum) {
00658 av_log(avctx, AV_LOG_ERROR,
00659 "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
00660 band->plane, band->band_num, band->checksum, chksum);
00661 }
00662 }
00663 #endif
00664
00665 align_get_bits(&ctx->gb);
00666
00667 return result;
00668 }
00669
00670
00676 static void switch_buffers(IVI5DecContext *ctx)
00677 {
00678 switch (ctx->prev_frame_type) {
00679 case FRAMETYPE_INTRA:
00680 case FRAMETYPE_INTER:
00681 ctx->buf_switch ^= 1;
00682 ctx->dst_buf = ctx->buf_switch;
00683 ctx->ref_buf = ctx->buf_switch ^ 1;
00684 break;
00685 case FRAMETYPE_INTER_SCAL:
00686 if (!ctx->inter_scal) {
00687 ctx->ref2_buf = 2;
00688 ctx->inter_scal = 1;
00689 }
00690 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
00691 ctx->ref_buf = ctx->ref2_buf;
00692 break;
00693 case FRAMETYPE_INTER_NOREF:
00694 break;
00695 }
00696
00697 switch (ctx->frame_type) {
00698 case FRAMETYPE_INTRA:
00699 ctx->buf_switch = 0;
00700
00701 case FRAMETYPE_INTER:
00702 ctx->inter_scal = 0;
00703 ctx->dst_buf = ctx->buf_switch;
00704 ctx->ref_buf = ctx->buf_switch ^ 1;
00705 break;
00706 case FRAMETYPE_INTER_SCAL:
00707 case FRAMETYPE_INTER_NOREF:
00708 case FRAMETYPE_NULL:
00709 break;
00710 }
00711 }
00712
00713
00717 static av_cold int decode_init(AVCodecContext *avctx)
00718 {
00719 IVI5DecContext *ctx = avctx->priv_data;
00720 int result;
00721
00722 ff_ivi_init_static_vlc();
00723
00724
00725 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00726
00727
00728
00729
00730 ctx->pic_conf.pic_width = avctx->width;
00731 ctx->pic_conf.pic_height = avctx->height;
00732 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
00733 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
00734 ctx->pic_conf.tile_width = avctx->width;
00735 ctx->pic_conf.tile_height = avctx->height;
00736 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
00737
00738 avcodec_get_frame_defaults(&ctx->frame);
00739
00740 result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
00741 if (result) {
00742 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
00743 return -1;
00744 }
00745
00746 ctx->buf_switch = 0;
00747 ctx->inter_scal = 0;
00748
00749 avctx->pix_fmt = PIX_FMT_YUV410P;
00750
00751 return 0;
00752 }
00753
00754
00758 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
00759 AVPacket *avpkt)
00760 {
00761 IVI5DecContext *ctx = avctx->priv_data;
00762 const uint8_t *buf = avpkt->data;
00763 int buf_size = avpkt->size;
00764 int result, p, b;
00765
00766 init_get_bits(&ctx->gb, buf, buf_size * 8);
00767 ctx->frame_data = buf;
00768 ctx->frame_size = buf_size;
00769
00770 result = decode_pic_hdr(ctx, avctx);
00771 if (result) {
00772 av_log(avctx, AV_LOG_ERROR,
00773 "Error while decoding picture header: %d\n", result);
00774 return -1;
00775 }
00776 if (ctx->gop_invalid)
00777 return AVERROR_INVALIDDATA;
00778
00779 if (ctx->gop_flags & IVI5_IS_PROTECTED) {
00780 av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
00781 return -1;
00782 }
00783
00784 switch_buffers(ctx);
00785
00786
00787
00788 if (ctx->frame_type != FRAMETYPE_NULL) {
00789 for (p = 0; p < 3; p++) {
00790 for (b = 0; b < ctx->planes[p].num_bands; b++) {
00791 result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
00792 if (result) {
00793 av_log(avctx, AV_LOG_ERROR,
00794 "Error while decoding band: %d, plane: %d\n", b, p);
00795 return -1;
00796 }
00797 }
00798 }
00799 }
00800
00801
00802
00803 if (ctx->frame.data[0])
00804 avctx->release_buffer(avctx, &ctx->frame);
00805
00806 ctx->frame.reference = 0;
00807 if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
00808 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00809 return -1;
00810 }
00811
00812 if (ctx->is_scalable) {
00813 ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
00814 } else {
00815 ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
00816 }
00817
00818 ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
00819 ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
00820
00821 *data_size = sizeof(AVFrame);
00822 *(AVFrame*)data = ctx->frame;
00823
00824 return buf_size;
00825 }
00826
00827
00831 static av_cold int decode_close(AVCodecContext *avctx)
00832 {
00833 IVI5DecContext *ctx = avctx->priv_data;
00834
00835 ff_ivi_free_buffers(&ctx->planes[0]);
00836
00837 if (ctx->mb_vlc.cust_tab.table)
00838 free_vlc(&ctx->mb_vlc.cust_tab);
00839
00840 if (ctx->frame.data[0])
00841 avctx->release_buffer(avctx, &ctx->frame);
00842
00843 return 0;
00844 }
00845
00846
00847 AVCodec ff_indeo5_decoder = {
00848 .name = "indeo5",
00849 .type = AVMEDIA_TYPE_VIDEO,
00850 .id = CODEC_ID_INDEO5,
00851 .priv_data_size = sizeof(IVI5DecContext),
00852 .init = decode_init,
00853 .close = decode_close,
00854 .decode = decode_frame,
00855 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
00856 };