static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid) { MXFContext *mxf = arg; MXFPartition *partition; UID op; uint64_t footer_partition; if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions)) return AVERROR(ENOMEM); mxf->partitions = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions)); if (!mxf->partitions) return AVERROR(ENOMEM); if (mxf->parsing_backward) { /* insert the new partition pack in the middle * this makes the entries in mxf->partitions sorted by offset */ memmove(&mxf->partitions[mxf->last_forward_partition+1], &mxf->partitions[mxf->last_forward_partition], (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions)); partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition]; } else { mxf->last_forward_partition++; partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count]; } memset(partition, 0, sizeof(*partition)); mxf->partitions_count++; switch(uid[13]) { case 2: partition->type = Header; break; case 3: partition->type = BodyPartition; break; case 4: partition->type = Footer; break; default: av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]); return AVERROR_INVALIDDATA; } /* consider both footers to be closed (there is only Footer and CompleteFooter) */ partition->closed = partition->type == Footer || !(uid[14] & 1); partition->complete = uid[14] > 2; avio_skip(pb, 8); partition->this_partition = avio_rb64(pb); partition->previous_partition = avio_rb64(pb); footer_partition = avio_rb64(pb); avio_skip(pb, 16); partition->index_sid = avio_rb32(pb); avio_skip(pb, 8); partition->body_sid = avio_rb32(pb); avio_read(pb, op, sizeof(UID)); /* some files don'thave FooterPartition set in every partition */ if (footer_partition) { if (mxf->footer_partition && mxf->footer_partition != footer_partition) { av_log(mxf->fc, AV_LOG_ERROR, "inconsistent FooterPartition value: %li != %li\n", mxf->footer_partition, footer_partition); } else { mxf->footer_partition = footer_partition; } } av_dlog(mxf->fc, "PartitionPack: ThisPartition = 0x%lx, PreviousPartition = 0x%lx, " "FooterPartition = 0x%lx, IndexSID = %i, BodySID = %i\n", partition->this_partition, partition->previous_partition, footer_partition, partition->index_sid, partition->body_sid); if (op[12] == 1 && op[13] == 1) mxf->op = OP1a; else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b; else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c; else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a; else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b; else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c; else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a; else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b; else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c; else if (op[12] == 0x10) mxf->op = OPAtom; else av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh\n", op[12], op[13]); return 0; }