static void put_codebook_header(PutBitContext * pb, codebook_t * cb) { int i; int ordered = 0; put_bits(pb, 24, 0x564342); //magic put_bits(pb, 16, cb->ndimentions); put_bits(pb, 24, cb->nentries); for (i = 1; i < cb->nentries; i++) if (cb->entries[i].len < cb->entries[i-1].len) break; if (i == cb->nentries) ordered = 1; put_bits(pb, 1, ordered); if (ordered) { int len = cb->entries[0].len; put_bits(pb, 5, len); i = 0; while (i < cb->nentries) { int j; for (j = 0; j+i < cb->nentries; j++) if (cb->entries[j+i].len != len) break; put_bits(pb, ilog(cb->nentries - i), j); i += j; len++; } } else { int sparse = 0; for (i = 0; i < cb->nentries; i++) if (!cb->entries[i].len) break; if (i != cb->nentries) sparse = 1; put_bits(pb, 1, sparse); for (i = 0; i < cb->nentries; i++) { if (sparse) put_bits(pb, 1, !!cb->entries[i].len); if (cb->entries[i].len) put_bits(pb, 5, cb->entries[i].len - 1); } } put_bits(pb, 4, cb->lookup); if (cb->lookup) { int tmp = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries); int bits = ilog(cb->quantlist[0]); for (i = 1; i < tmp; i++) bits = FFMAX(bits, ilog(cb->quantlist[i])); put_float(pb, cb->min); put_float(pb, cb->delta); put_bits(pb, 4, bits - 1); put_bits(pb, 1, cb->seq_p); for (i = 0; i < tmp; i++) put_bits(pb, bits, cb->quantlist[i]); } }