int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb, VLC *vlc, const uint16_t *level_table, const uint16_t *run_table, int version, WMACoef *ptr, int offset, int num_coefs, int block_len, int frame_len_bits, int coef_nb_bits) { int code, run, level, sign; WMACoef* eptr = ptr + num_coefs; ptr += offset; for(;;) { code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX); if (code < 0) return -1; if (code == 1) { /* EOB */ break; } else if (code == 0) { /* escape */ if (!version) { level = get_bits(gb, coef_nb_bits); /* NOTE: this is rather suboptimal. reading block_len_bits would be better */ run = get_bits(gb, frame_len_bits); } else { level = ff_wma_get_large_val(gb); /** escape decode */ if (get_bits1(gb)) { if (get_bits1(gb)) { if (get_bits1(gb)) { av_log(avctx,AV_LOG_ERROR, "broken escape sequence\n"); return -1; } else run = get_bits(gb, frame_len_bits) + 4; } else run = get_bits(gb, 2) + 1; } else run = 0; } } else { /* normal code */ run = run_table[code]; level = level_table[code]; } sign = get_bits1(gb); if (!sign) level = -level; ptr += run; if (ptr >= eptr) { av_log(NULL, AV_LOG_ERROR, "overflow in spectral RLE, ignoring\n"); break; } *ptr++ = level; /* NOTE: EOB can be omitted */ if (ptr >= eptr) break; } return 0; }