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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 FFmpeg.
00006  *
00007  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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, is_scalable;
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 -1;
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     is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
00085     if (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 -1;
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(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
00102         return -1;
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)) {
00117         result = ff_ivi_init_planes(ctx->planes, &pic_conf);
00118         if (result) {
00119             av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
00120             return -1;
00121         }
00122         ctx->pic_conf = pic_conf;
00123         ctx->is_scalable = is_scalable;
00124         blk_size_changed = 1; /* force reallocation of the internal structures */
00125     }
00126 
00127     for (p = 0; p <= 1; p++) {
00128         for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
00129             band = &ctx->planes[p].bands[i];
00130 
00131             band->is_halfpel = get_bits1(&ctx->gb);
00132 
00133             mb_size  = get_bits1(&ctx->gb);
00134             blk_size = 8 >> get_bits1(&ctx->gb);
00135             mb_size  = blk_size << !mb_size;
00136 
00137             blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
00138             if (blk_size_changed) {
00139                 band->mb_size  = mb_size;
00140                 band->blk_size = blk_size;
00141             }
00142 
00143             if (get_bits1(&ctx->gb)) {
00144                 av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
00145                 return -1;
00146             }
00147 
00148             /* select transform function and scan pattern according to plane and band number */
00149             switch ((p << 2) + i) {
00150             case 0:
00151                 band->inv_transform = ff_ivi_inverse_slant_8x8;
00152                 band->dc_transform  = ff_ivi_dc_slant_2d;
00153                 band->scan          = ff_zigzag_direct;
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                 break;
00161 
00162             case 2:
00163                 band->inv_transform = ff_ivi_col_slant8;
00164                 band->dc_transform  = ff_ivi_dc_col_slant;
00165                 band->scan          = ff_ivi_horizontal_scan_8x8;
00166                 break;
00167 
00168             case 3:
00169                 band->inv_transform = ff_ivi_put_pixels_8x8;
00170                 band->dc_transform  = ff_ivi_put_dc_pixel_8x8;
00171                 band->scan          = ff_ivi_horizontal_scan_8x8;
00172                 break;
00173 
00174             case 4:
00175                 band->inv_transform = ff_ivi_inverse_slant_4x4;
00176                 band->dc_transform  = ff_ivi_dc_slant_2d;
00177                 band->scan          = ff_ivi_direct_scan_4x4;
00178                 break;
00179             }
00180 
00181             band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
00182                                 band->inv_transform == ff_ivi_inverse_slant_4x4;
00183 
00184             /* select dequant matrix according to plane and band number */
00185             if (!p) {
00186                 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
00187             } else {
00188                 quant_mat = 5;
00189             }
00190 
00191             if (band->blk_size == 8) {
00192                 if(quant_mat >= 5){
00193                     av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
00194                     return -1;
00195                 }
00196                 band->intra_base  = &ivi5_base_quant_8x8_intra[quant_mat][0];
00197                 band->inter_base  = &ivi5_base_quant_8x8_inter[quant_mat][0];
00198                 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
00199                 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
00200             } else {
00201                 band->intra_base  = ivi5_base_quant_4x4_intra;
00202                 band->inter_base  = ivi5_base_quant_4x4_inter;
00203                 band->intra_scale = ivi5_scale_quant_4x4_intra;
00204                 band->inter_scale = ivi5_scale_quant_4x4_inter;
00205             }
00206 
00207             if (get_bits(&ctx->gb, 2)) {
00208                 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
00209                 return -1;
00210             }
00211         }
00212     }
00213 
00214     /* copy chroma parameters into the 2nd chroma plane */
00215     for (i = 0; i < pic_conf.chroma_bands; i++) {
00216         band1 = &ctx->planes[1].bands[i];
00217         band2 = &ctx->planes[2].bands[i];
00218 
00219         band2->width         = band1->width;
00220         band2->height        = band1->height;
00221         band2->mb_size       = band1->mb_size;
00222         band2->blk_size      = band1->blk_size;
00223         band2->is_halfpel    = band1->is_halfpel;
00224         band2->intra_base    = band1->intra_base;
00225         band2->inter_base    = band1->inter_base;
00226         band2->intra_scale   = band1->intra_scale;
00227         band2->inter_scale   = band1->inter_scale;
00228         band2->scan          = band1->scan;
00229         band2->inv_transform = band1->inv_transform;
00230         band2->dc_transform  = band1->dc_transform;
00231         band2->is_2d_trans   = band1->is_2d_trans;
00232     }
00233 
00234     /* reallocate internal structures if needed */
00235     if (blk_size_changed) {
00236         result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
00237                                    pic_conf.tile_height);
00238         if (result) {
00239             av_log(avctx, AV_LOG_ERROR,
00240                    "Couldn't reallocate internal structures!\n");
00241             return -1;
00242         }
00243     }
00244 
00245     if (ctx->gop_flags & 8) {
00246         if (get_bits(&ctx->gb, 3)) {
00247             av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
00248             return -1;
00249         }
00250 
00251         if (get_bits1(&ctx->gb))
00252             skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
00253     }
00254 
00255     align_get_bits(&ctx->gb);
00256 
00257     skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
00258 
00259     /* skip GOP extension if any */
00260     if (get_bits1(&ctx->gb)) {
00261         do {
00262             i = get_bits(&ctx->gb, 16);
00263         } while (i & 0x8000);
00264     }
00265 
00266     align_get_bits(&ctx->gb);
00267 
00268     return 0;
00269 }
00270 
00271 
00277 static inline void skip_hdr_extension(GetBitContext *gb)
00278 {
00279     int i, len;
00280 
00281     do {
00282         len = get_bits(gb, 8);
00283         for (i = 0; i < len; i++) skip_bits(gb, 8);
00284     } while(len);
00285 }
00286 
00287 
00295 static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
00296 {
00297     if (get_bits(&ctx->gb, 5) != 0x1F) {
00298         av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
00299         return -1;
00300     }
00301 
00302     ctx->prev_frame_type = ctx->frame_type;
00303     ctx->frame_type      = get_bits(&ctx->gb, 3);
00304     if (ctx->frame_type >= 5) {
00305         av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
00306         return -1;
00307     }
00308 
00309     ctx->frame_num = get_bits(&ctx->gb, 8);
00310 
00311     if (ctx->frame_type == FRAMETYPE_INTRA) {
00312         ctx->gop_invalid = 1;
00313         if (decode_gop_header(ctx, avctx)) {
00314             av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
00315             return AVERROR_INVALIDDATA;
00316         }
00317         ctx->gop_invalid = 0;
00318     }
00319 
00320     if (ctx->frame_type != FRAMETYPE_NULL) {
00321         ctx->frame_flags = get_bits(&ctx->gb, 8);
00322 
00323         ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
00324 
00325         ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
00326 
00327         /* skip unknown extension if any */
00328         if (ctx->frame_flags & 0x20)
00329             skip_hdr_extension(&ctx->gb); /* XXX: untested */
00330 
00331         /* decode macroblock huffman codebook */
00332         if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
00333             return -1;
00334 
00335         skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
00336     }
00337 
00338     align_get_bits(&ctx->gb);
00339 
00340     return 0;
00341 }
00342 
00343 
00352 static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
00353                            AVCodecContext *avctx)
00354 {
00355     int         i;
00356     uint8_t     band_flags;
00357 
00358     band_flags = get_bits(&ctx->gb, 8);
00359 
00360     if (band_flags & 1) {
00361         band->is_empty = 1;
00362         return 0;
00363     }
00364 
00365     band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
00366 
00367     band->inherit_mv     = band_flags & 2;
00368     band->inherit_qdelta = band_flags & 8;
00369     band->qdelta_present = band_flags & 4;
00370     if (!band->qdelta_present) band->inherit_qdelta = 1;
00371 
00372     /* decode rvmap probability corrections if any */
00373     band->num_corr = 0; /* there are no corrections */
00374     if (band_flags & 0x10) {
00375         band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
00376         if (band->num_corr > 61) {
00377             av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
00378                    band->num_corr);
00379             return -1;
00380         }
00381 
00382         /* read correction pairs */
00383         for (i = 0; i < band->num_corr * 2; i++)
00384             band->corr[i] = get_bits(&ctx->gb, 8);
00385     }
00386 
00387     /* select appropriate rvmap table for this band */
00388     band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
00389 
00390     /* decode block huffman codebook */
00391     if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
00392         return -1;
00393 
00394     band->checksum_present = get_bits1(&ctx->gb);
00395     if (band->checksum_present)
00396         band->checksum = get_bits(&ctx->gb, 16);
00397 
00398     band->glob_quant = get_bits(&ctx->gb, 5);
00399 
00400     /* skip unknown extension if any */
00401     if (band_flags & 0x20) { /* XXX: untested */
00402         align_get_bits(&ctx->gb);
00403         skip_hdr_extension(&ctx->gb);
00404     }
00405 
00406     align_get_bits(&ctx->gb);
00407 
00408     return 0;
00409 }
00410 
00411 
00422 static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
00423                           IVITile *tile, AVCodecContext *avctx)
00424 {
00425     int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
00426                 mv_scale, blks_per_mb;
00427     IVIMbInfo   *mb, *ref_mb;
00428     int         row_offset = band->mb_size * band->pitch;
00429 
00430     mb     = tile->mbs;
00431     ref_mb = tile->ref_mbs;
00432     offs   = tile->ypos * band->pitch + tile->xpos;
00433 
00434     if (!ref_mb &&
00435         ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
00436         return AVERROR_INVALIDDATA;
00437 
00438     if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
00439         av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
00440                tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
00441         return AVERROR_INVALIDDATA;
00442     }
00443 
00444     /* scale factor for motion vectors */
00445     mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
00446     mv_x = mv_y = 0;
00447 
00448     for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
00449         mb_offset = offs;
00450 
00451         for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
00452             mb->xpos     = x;
00453             mb->ypos     = y;
00454             mb->buf_offs = mb_offset;
00455 
00456             if (get_bits1(&ctx->gb)) {
00457                 if (ctx->frame_type == FRAMETYPE_INTRA) {
00458                     av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
00459                     return -1;
00460                 }
00461                 mb->type = 1; /* empty macroblocks are always INTER */
00462                 mb->cbp  = 0; /* all blocks are empty */
00463 
00464                 mb->q_delta = 0;
00465                 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
00466                     mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00467                                            IVI_VLC_BITS, 1);
00468                     mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00469                 }
00470 
00471                 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
00472                 if (band->inherit_mv && ref_mb){
00473                     /* motion vector inheritance */
00474                     if (mv_scale) {
00475                         mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00476                         mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00477                     } else {
00478                         mb->mv_x = ref_mb->mv_x;
00479                         mb->mv_y = ref_mb->mv_y;
00480                     }
00481                 }
00482             } else {
00483                 if (band->inherit_mv && ref_mb) {
00484                     mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
00485                 } else if (ctx->frame_type == FRAMETYPE_INTRA) {
00486                     mb->type = 0; /* mb_type is always INTRA for intra-frames */
00487                 } else {
00488                     mb->type = get_bits1(&ctx->gb);
00489                 }
00490 
00491                 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
00492                 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
00493 
00494                 mb->q_delta = 0;
00495                 if (band->qdelta_present) {
00496                     if (band->inherit_qdelta) {
00497                         if (ref_mb) mb->q_delta = ref_mb->q_delta;
00498                     } else if (mb->cbp || (!band->plane && !band->band_num &&
00499                                            (ctx->frame_flags & 8))) {
00500                         mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00501                                                IVI_VLC_BITS, 1);
00502                         mb->q_delta = IVI_TOSIGNED(mb->q_delta);
00503                     }
00504                 }
00505 
00506                 if (!mb->type) {
00507                     mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
00508                 } else {
00509                     if (band->inherit_mv && ref_mb){
00510                         /* motion vector inheritance */
00511                         if (mv_scale) {
00512                             mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
00513                             mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
00514                         } else {
00515                             mb->mv_x = ref_mb->mv_x;
00516                             mb->mv_y = ref_mb->mv_y;
00517                         }
00518                     } else {
00519                         /* decode motion vector deltas */
00520                         mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00521                                             IVI_VLC_BITS, 1);
00522                         mv_y += IVI_TOSIGNED(mv_delta);
00523                         mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
00524                                             IVI_VLC_BITS, 1);
00525                         mv_x += IVI_TOSIGNED(mv_delta);
00526                         mb->mv_x = mv_x;
00527                         mb->mv_y = mv_y;
00528                     }
00529                 }
00530             }
00531 
00532             mb++;
00533             if (ref_mb)
00534                 ref_mb++;
00535             mb_offset += band->mb_size;
00536         }
00537 
00538         offs += row_offset;
00539     }
00540 
00541     align_get_bits(&ctx->gb);
00542 
00543     return 0;
00544 }
00545 
00546 
00552 static void switch_buffers(IVI45DecContext *ctx)
00553 {
00554     switch (ctx->prev_frame_type) {
00555     case FRAMETYPE_INTRA:
00556     case FRAMETYPE_INTER:
00557         ctx->buf_switch ^= 1;
00558         ctx->dst_buf = ctx->buf_switch;
00559         ctx->ref_buf = ctx->buf_switch ^ 1;
00560         break;
00561     case FRAMETYPE_INTER_SCAL:
00562         if (!ctx->inter_scal) {
00563             ctx->ref2_buf   = 2;
00564             ctx->inter_scal = 1;
00565         }
00566         FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
00567         ctx->ref_buf = ctx->ref2_buf;
00568         break;
00569     case FRAMETYPE_INTER_NOREF:
00570         break;
00571     }
00572 
00573     switch (ctx->frame_type) {
00574     case FRAMETYPE_INTRA:
00575         ctx->buf_switch = 0;
00576         /* FALLTHROUGH */
00577     case FRAMETYPE_INTER:
00578         ctx->inter_scal = 0;
00579         ctx->dst_buf = ctx->buf_switch;
00580         ctx->ref_buf = ctx->buf_switch ^ 1;
00581         break;
00582     case FRAMETYPE_INTER_SCAL:
00583     case FRAMETYPE_INTER_NOREF:
00584     case FRAMETYPE_NULL:
00585         break;
00586     }
00587 }
00588 
00589 
00590 static int is_nonnull_frame(IVI45DecContext *ctx)
00591 {
00592     return ctx->frame_type != FRAMETYPE_NULL;
00593 }
00594 
00595 
00599 static av_cold int decode_init(AVCodecContext *avctx)
00600 {
00601     IVI45DecContext  *ctx = avctx->priv_data;
00602     int             result;
00603 
00604     ff_ivi_init_static_vlc();
00605 
00606     /* copy rvmap tables in our context so we can apply changes to them */
00607     memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
00608 
00609     /* set the initial picture layout according to the basic profile:
00610        there is only one band per plane (no scalability), only one tile (no local decoding)
00611        and picture format = YVU9 */
00612     ctx->pic_conf.pic_width     = avctx->width;
00613     ctx->pic_conf.pic_height    = avctx->height;
00614     ctx->pic_conf.chroma_width  = (avctx->width  + 3) >> 2;
00615     ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
00616     ctx->pic_conf.tile_width    = avctx->width;
00617     ctx->pic_conf.tile_height   = avctx->height;
00618     ctx->pic_conf.luma_bands    = ctx->pic_conf.chroma_bands = 1;
00619 
00620     avcodec_get_frame_defaults(&ctx->frame);
00621 
00622     result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
00623     if (result) {
00624         av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
00625         return -1;
00626     }
00627 
00628     ctx->buf_switch = 0;
00629     ctx->inter_scal = 0;
00630 
00631     ctx->decode_pic_hdr   = decode_pic_hdr;
00632     ctx->decode_band_hdr  = decode_band_hdr;
00633     ctx->decode_mb_info   = decode_mb_info;
00634     ctx->switch_buffers   = switch_buffers;
00635     ctx->is_nonnull_frame = is_nonnull_frame;
00636 
00637     avctx->pix_fmt = PIX_FMT_YUV410P;
00638 
00639     return 0;
00640 }
00641 
00642 
00643 AVCodec ff_indeo5_decoder = {
00644     .name           = "indeo5",
00645     .type           = AVMEDIA_TYPE_VIDEO,
00646     .id             = CODEC_ID_INDEO5,
00647     .priv_data_size = sizeof(IVI45DecContext),
00648     .init           = decode_init,
00649     .close          = ff_ivi_decode_close,
00650     .decode         = ff_ivi_decode_frame,
00651     .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
00652 };
Generated on Fri Feb 1 2013 14:34:36 for FFmpeg by doxygen 1.7.1