-/**
- * Decode an Indeo5 band.
- *
- * @param[in,out] ctx ptr to the decoder context
- * @param[in,out] band ptr to the band descriptor
- * @param[in] avctx ptr to the AVCodecContext
- * @return result code: 0 = OK, -1 = error
- */
-static int decode_band(IVI5DecContext *ctx, int plane_num,
- IVIBandDesc *band, AVCodecContext *avctx)
-{
- int result, i, t, idx1, idx2, pos;
- IVITile *tile;
-
- band->buf = band->bufs[ctx->dst_buf];
- band->ref_buf = band->bufs[ctx->ref_buf];
- band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
-
- result = decode_band_hdr(ctx, band, avctx);
- if (result) {
- av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
- result);
- return -1;
- }
-
- if (band->is_empty) {
- av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
- return -1;
- }
-
- band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
-
- /* apply corrections to the selected rvmap table if present */
- for (i = 0; i < band->num_corr; i++) {
- idx1 = band->corr[i*2];
- idx2 = band->corr[i*2+1];
- FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
- FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
- }
-
- pos = get_bits_count(&ctx->gb);
-
- for (t = 0; t < band->num_tiles; t++) {
- tile = &band->tiles[t];
-
- tile->is_empty = get_bits1(&ctx->gb);
- if (tile->is_empty) {
- ff_ivi_process_empty_tile(avctx, band, tile,
- (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
- } else {
- tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
-
- result = decode_mb_info(ctx, band, tile, avctx);
- if (result < 0)
- break;
-
- result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
- if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) {
- av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
- break;
- }
- pos += tile->data_size << 3; // skip to next tile
- }
- }
-
- /* restore the selected rvmap table by applying its corrections in reverse order */
- for (i = band->num_corr-1; i >= 0; i--) {
- idx1 = band->corr[i*2];
- idx2 = band->corr[i*2+1];
- FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
- FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
- }
-
-#ifdef DEBUG
- if (band->checksum_present) {
- uint16_t chksum = ivi_calc_band_checksum(band);
- if (chksum != band->checksum) {
- av_log(avctx, AV_LOG_ERROR,
- "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
- band->plane, band->band_num, band->checksum, chksum);
- }
- }
-#endif
-
- align_get_bits(&ctx->gb);
-
- return result;
-}
-
-