libavcodec/indeo5.c
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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 Libav.
00006  *
00007  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
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     /* decode number of wavelet bands */
00081     /* num_levels * 3 + 1 */
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     /* check if picture layout was changed and reallocate buffers */
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; /* force reallocation of the internal structures */
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             /* select transform function and scan pattern according to plane and band number */
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             /* select dequant matrix according to plane and band number */
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     /* copy chroma parameters into the 2nd chroma plane */
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     /* reallocate internal structures if needed */
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); /* skip transparency fill color */
00256     }
00257 
00258     align_get_bits(&ctx->gb);
00259 
00260     skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
00261 
00262     /* skip GOP extension if any */
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         /* skip unknown extension if any */
00333         if (ctx->frame_flags & 0x20)
00334             skip_hdr_extension(&ctx->gb); /* XXX: untested */
00335 
00336         /* decode macroblock huffman codebook */
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); /* FIXME: unknown meaning! */
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     /* decode rvmap probability corrections if any */
00380     band->num_corr = 0; /* there are no corrections */
00381     if (band_flags & 0x10) {
00382         band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
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         /* read correction pairs */
00390         for (i = 0; i < band->num_corr * 2; i++)
00391             band->corr[i] = get_bits(&ctx->gb, 8);
00392     }
00393 
00394     /* select appropriate rvmap table for this band */
00395     band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
00396 
00397     /* decode block huffman codebook */
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     /* skip unknown extension if any */
00410     if (band_flags & 0x20) { /* XXX: untested */
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     /* scale factor for motion vectors */
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; /* empty macroblocks are always INTER */
00471                 mb->cbp  = 0; /* all blocks are empty */
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; /* no motion vector coded */
00481                 if (band->inherit_mv){
00482                     /* motion vector inheritance */
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; /* copy mb_type from corresponding reference mb */
00494                 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
00495                     mb->type = 0; /* mb_type is always INTRA for intra-frames */
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; /* there is no motion vector in intra-macroblocks */
00517                 } else {
00518                     if (band->inherit_mv){
00519                         /* motion vector inheritance */
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                         /* decode motion vector deltas */
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         /* FALLTHROUGH */
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     /* copy rvmap tables in our context so we can apply changes to them */
00616     memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00617 
00618     /* set the initial picture layout according to the basic profile:
00619        there is only one band per plane (no scalability), only one tile (no local decoding)
00620        and picture format = YVU9 */
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 };