+ if (fn->btrn) {
+ need = (fg->h.data_slices_per_group - i) * sb;
+ if (need > btr_pool_unused(pfd->btrp))
+ return -E_FECDEC_OVERRUN;
+ btr_pool_get_buffer(pfd->btrp, &buf);
+ p = buf;
+ } else {
+ need = fn->loaded + (fg->h.data_slices_per_group - i) * sb;
+ if (need > fn->bufsize) {
+ fn->bufsize = PARA_MAX(fn->bufsize * 2, need);
+ if (fn->bufsize > FECDEC_MAX_OUTBUF_SIZE)
+ return -E_FECDEC_OVERRUN;
+ PARA_INFO_LOG("increasing fec buf to %zu\n", fn->bufsize);
+ fn->buf = para_realloc(fn->buf, fn->bufsize);
+ }
+ p = fn->buf + fn->loaded;
+ }
+ if (u == FEC_GROUP_USABLE_WITH_HEADER) {
+ PARA_INFO_LOG("writing audio file header\n");
+ written = 0;
+ for (i = 0; i < fg->h.data_slices_per_group; i++) {
+ size_t n = sb;
+ if (written >= fg->h.audio_header_size)
+ break;
+ if (sb + written > fg->h.audio_header_size)
+ n = fg->h.audio_header_size - written;
+ if (fn->btrn)
+ btr_copy(fg->data[i], n, pfd->btrp, fn->btrn);
+ else
+ memcpy(p + written, fg->data[i], n);
+ fn->loaded += n;
+ written += n;
+ }
+ p += written;
+ }
+ written = 0;