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fd34dbea58
These values include KAGSize, HeaderByteCount and IndexByteCount. The length of the pack itself is also stored, and KAGSize is sanity checked. The FATE sample has KAGSize == 0, which is adjusted to 512. Other bad KAGSizes are set to 1.
1672 lines
64 KiB
C
1672 lines
64 KiB
C
/*
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* MXF demuxer.
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* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* References
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* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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* SMPTE 377M MXF File Format Specifications
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* SMPTE 378M Operational Pattern 1a
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* SMPTE 379M MXF Generic Container
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* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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* SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
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* SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
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*
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* Principle
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* Search for Track numbers which will identify essence element KLV packets.
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* Search for SourcePackage which define tracks which contains Track numbers.
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* Material Package contains tracks with reference to SourcePackage tracks.
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* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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* Assign Descriptors to correct Tracks.
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*
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* Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
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* Metadata parsing resolves Strong References to objects.
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*
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* Simple demuxer, only OP1A supported and some files might not work at all.
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* Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
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*/
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//#define DEBUG
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#include "libavutil/aes.h"
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#include "libavutil/mathematics.h"
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#include "libavcodec/bytestream.h"
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#include "avformat.h"
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#include "internal.h"
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#include "mxf.h"
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typedef enum {
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Header,
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BodyPartition,
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Footer
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} MXFPartitionType;
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typedef enum {
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OP1a,
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OP1b,
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OP1c,
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OP2a,
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OP2b,
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OP2c,
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OP3a,
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OP3b,
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OP3c,
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OPAtom,
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OPSONYOpt, /* FATE sample, violates the spec in places */
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} MXFOP;
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typedef struct {
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int closed;
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int complete;
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MXFPartitionType type;
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uint64_t previous_partition;
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int index_sid;
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int body_sid;
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int64_t this_partition;
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int64_t essence_offset; /* absolute offset of essence */
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int64_t essence_length;
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int32_t kag_size;
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int64_t header_byte_count;
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int64_t index_byte_count;
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int pack_length;
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} MXFPartition;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID source_container_ul;
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} MXFCryptoContext;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID source_package_uid;
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UID data_definition_ul;
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int64_t duration;
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int64_t start_position;
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int source_track_id;
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} MXFStructuralComponent;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID data_definition_ul;
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UID *structural_components_refs;
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int structural_components_count;
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int64_t duration;
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} MXFSequence;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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MXFSequence *sequence; /* mandatory, and only one */
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UID sequence_ref;
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int track_id;
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uint8_t track_number[4];
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AVRational edit_rate;
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} MXFTrack;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID essence_container_ul;
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UID essence_codec_ul;
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AVRational sample_rate;
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AVRational aspect_ratio;
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int width;
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int height;
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int channels;
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int bits_per_sample;
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UID *sub_descriptors_refs;
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int sub_descriptors_count;
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int linked_track_id;
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uint8_t *extradata;
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int extradata_size;
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enum PixelFormat pix_fmt;
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} MXFDescriptor;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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int edit_unit_byte_count;
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int index_sid;
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int body_sid;
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int slice_count;
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AVRational index_edit_rate;
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uint64_t index_start_position;
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uint64_t index_duration;
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int *slice;
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int *element_delta;
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int nb_delta_entries;
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int8_t *temporal_offset_entries;
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int *flag_entries;
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uint64_t *stream_offset_entries;
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uint32_t **slice_offset_entries;
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int nb_index_entries;
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} MXFIndexTableSegment;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID package_uid;
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UID *tracks_refs;
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int tracks_count;
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MXFDescriptor *descriptor; /* only one */
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UID descriptor_ref;
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} MXFPackage;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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} MXFMetadataSet;
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typedef struct {
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MXFPartition *partitions;
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unsigned partitions_count;
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MXFOP op;
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UID *packages_refs;
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int packages_count;
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MXFMetadataSet **metadata_sets;
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int metadata_sets_count;
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AVFormatContext *fc;
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struct AVAES *aesc;
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uint8_t *local_tags;
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int local_tags_count;
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uint64_t footer_partition;
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int system_item;
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int64_t essence_offset;
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int first_essence_kl_length;
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int64_t first_essence_length;
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KLVPacket current_klv_data;
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int current_klv_index;
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int run_in;
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MXFPartition *current_partition;
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int parsing_backward;
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int64_t last_forward_tell;
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int last_forward_partition;
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} MXFContext;
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enum MXFWrappingScheme {
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Frame,
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Clip,
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};
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/* NOTE: klv_offset is not set (-1) for local keys */
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typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
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typedef struct {
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const UID key;
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MXFMetadataReadFunc *read;
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int ctx_size;
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enum MXFMetadataSetType type;
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} MXFMetadataReadTableEntry;
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/* partial keys to match */
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static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
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static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
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static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
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static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
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/* complete keys to match */
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static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
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static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
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static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
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static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
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#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
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static int64_t klv_decode_ber_length(AVIOContext *pb)
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{
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uint64_t size = avio_r8(pb);
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if (size & 0x80) { /* long form */
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int bytes_num = size & 0x7f;
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/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
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if (bytes_num > 8)
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return -1;
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size = 0;
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while (bytes_num--)
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size = size << 8 | avio_r8(pb);
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}
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return size;
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}
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static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
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{
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int i, b;
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for (i = 0; i < size && !url_feof(pb); i++) {
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b = avio_r8(pb);
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if (b == key[0])
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i = 0;
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else if (b != key[i])
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i = -1;
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}
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return i == size;
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}
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static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
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{
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if (!mxf_read_sync(pb, mxf_klv_key, 4))
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return -1;
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klv->offset = avio_tell(pb) - 4;
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memcpy(klv->key, mxf_klv_key, 4);
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avio_read(pb, klv->key + 4, 12);
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klv->length = klv_decode_ber_length(pb);
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return klv->length == -1 ? -1 : 0;
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}
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static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
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{
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int i;
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for (i = 0; i < s->nb_streams; i++) {
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MXFTrack *track = s->streams[i]->priv_data;
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/* SMPTE 379M 7.3 */
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if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
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return i;
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}
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/* return 0 if only one stream, for OP Atom files with 0 as track number */
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return s->nb_streams == 1 ? 0 : -1;
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}
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/* XXX: use AVBitStreamFilter */
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static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
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{
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const uint8_t *buf_ptr, *end_ptr;
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uint8_t *data_ptr;
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int i;
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if (length > 61444) /* worst case PAL 1920 samples 8 channels */
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return -1;
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length = av_get_packet(pb, pkt, length);
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if (length < 0)
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return length;
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data_ptr = pkt->data;
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end_ptr = pkt->data + length;
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buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
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for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
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for (i = 0; i < st->codec->channels; i++) {
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uint32_t sample = bytestream_get_le32(&buf_ptr);
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if (st->codec->bits_per_coded_sample == 24)
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bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
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else
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bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
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}
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buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
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}
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av_shrink_packet(pkt, data_ptr - pkt->data);
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return 0;
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}
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static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
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{
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static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
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MXFContext *mxf = s->priv_data;
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AVIOContext *pb = s->pb;
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int64_t end = avio_tell(pb) + klv->length;
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int64_t size;
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uint64_t orig_size;
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uint64_t plaintext_size;
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uint8_t ivec[16];
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uint8_t tmpbuf[16];
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int index;
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if (!mxf->aesc && s->key && s->keylen == 16) {
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mxf->aesc = av_malloc(av_aes_size);
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if (!mxf->aesc)
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return -1;
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av_aes_init(mxf->aesc, s->key, 128, 1);
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}
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// crypto context
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avio_skip(pb, klv_decode_ber_length(pb));
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// plaintext offset
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klv_decode_ber_length(pb);
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plaintext_size = avio_rb64(pb);
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// source klv key
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klv_decode_ber_length(pb);
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avio_read(pb, klv->key, 16);
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if (!IS_KLV_KEY(klv, mxf_essence_element_key))
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return -1;
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index = mxf_get_stream_index(s, klv);
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if (index < 0)
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return -1;
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// source size
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klv_decode_ber_length(pb);
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orig_size = avio_rb64(pb);
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if (orig_size < plaintext_size)
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return -1;
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// enc. code
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size = klv_decode_ber_length(pb);
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if (size < 32 || size - 32 < orig_size)
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return -1;
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avio_read(pb, ivec, 16);
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avio_read(pb, tmpbuf, 16);
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if (mxf->aesc)
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av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
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if (memcmp(tmpbuf, checkv, 16))
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av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
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size -= 32;
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size = av_get_packet(pb, pkt, size);
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if (size < 0)
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return size;
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else if (size < plaintext_size)
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return AVERROR_INVALIDDATA;
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size -= plaintext_size;
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if (mxf->aesc)
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av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
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&pkt->data[plaintext_size], size >> 4, ivec, 1);
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av_shrink_packet(pkt, orig_size);
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pkt->stream_index = index;
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avio_skip(pb, end - avio_tell(pb));
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return 0;
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}
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static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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KLVPacket klv;
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while (!url_feof(s->pb)) {
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if (klv_read_packet(&klv, s->pb) < 0)
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return -1;
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PRINT_KEY(s, "read packet", klv.key);
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av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
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if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
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int res = mxf_decrypt_triplet(s, pkt, &klv);
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if (res < 0) {
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av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
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return -1;
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}
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return 0;
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}
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if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
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int index = mxf_get_stream_index(s, &klv);
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if (index < 0) {
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av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
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goto skip;
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}
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if (s->streams[index]->discard == AVDISCARD_ALL)
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goto skip;
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/* check for 8 channels AES3 element */
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if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
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if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
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av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
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return -1;
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}
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} else {
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int ret = av_get_packet(s->pb, pkt, klv.length);
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if (ret < 0)
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return ret;
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}
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pkt->stream_index = index;
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pkt->pos = klv.offset;
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return 0;
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} else
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skip:
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avio_skip(s->pb, klv.length);
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}
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return AVERROR_EOF;
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}
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static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
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{
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MXFContext *mxf = arg;
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int item_num = avio_rb32(pb);
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int item_len = avio_rb32(pb);
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if (item_len != 18) {
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av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
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return -1;
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}
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if (item_num > UINT_MAX / item_len)
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return -1;
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mxf->local_tags_count = item_num;
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mxf->local_tags = av_malloc(item_num*item_len);
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if (!mxf->local_tags)
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return -1;
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avio_read(pb, mxf->local_tags, item_num*item_len);
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return 0;
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}
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static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
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{
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MXFContext *mxf = arg;
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MXFPartition *partition;
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UID op;
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uint64_t footer_partition;
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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++;
|
|
partition->pack_length = avio_tell(pb) - klv_offset + size;
|
|
|
|
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, 4);
|
|
partition->kag_size = avio_rb32(pb);
|
|
partition->this_partition = avio_rb64(pb);
|
|
partition->previous_partition = avio_rb64(pb);
|
|
footer_partition = avio_rb64(pb);
|
|
partition->header_byte_count = avio_rb64(pb);
|
|
partition->index_byte_count = avio_rb64(pb);
|
|
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 if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
|
|
else {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
|
|
mxf->op = OP1a;
|
|
}
|
|
|
|
if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
|
|
av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
|
|
|
|
if (mxf->op == OPSONYOpt)
|
|
partition->kag_size = 512;
|
|
else
|
|
partition->kag_size = 1;
|
|
|
|
av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
|
|
{
|
|
if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
|
|
return AVERROR(ENOMEM);
|
|
mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
|
|
if (!mxf->metadata_sets)
|
|
return -1;
|
|
mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
|
|
mxf->metadata_sets_count++;
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFCryptoContext *cryptocontext = arg;
|
|
if (size != 16)
|
|
return -1;
|
|
if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
|
|
avio_read(pb, cryptocontext->source_container_ul, 16);
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFContext *mxf = arg;
|
|
switch (tag) {
|
|
case 0x1901:
|
|
mxf->packages_count = avio_rb32(pb);
|
|
if (mxf->packages_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
|
|
if (!mxf->packages_refs)
|
|
return -1;
|
|
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFStructuralComponent *source_clip = arg;
|
|
switch(tag) {
|
|
case 0x0202:
|
|
source_clip->duration = avio_rb64(pb);
|
|
break;
|
|
case 0x1201:
|
|
source_clip->start_position = avio_rb64(pb);
|
|
break;
|
|
case 0x1101:
|
|
/* UMID, only get last 16 bytes */
|
|
avio_skip(pb, 16);
|
|
avio_read(pb, source_clip->source_package_uid, 16);
|
|
break;
|
|
case 0x1102:
|
|
source_clip->source_track_id = avio_rb32(pb);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFPackage *package = arg;
|
|
switch(tag) {
|
|
case 0x4403:
|
|
package->tracks_count = avio_rb32(pb);
|
|
if (package->tracks_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
|
|
if (!package->tracks_refs)
|
|
return -1;
|
|
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFTrack *track = arg;
|
|
switch(tag) {
|
|
case 0x4801:
|
|
track->track_id = avio_rb32(pb);
|
|
break;
|
|
case 0x4804:
|
|
avio_read(pb, track->track_number, 4);
|
|
break;
|
|
case 0x4B01:
|
|
track->edit_rate.den = avio_rb32(pb);
|
|
track->edit_rate.num = avio_rb32(pb);
|
|
break;
|
|
case 0x4803:
|
|
avio_read(pb, track->sequence_ref, 16);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFSequence *sequence = arg;
|
|
switch(tag) {
|
|
case 0x0202:
|
|
sequence->duration = avio_rb64(pb);
|
|
break;
|
|
case 0x0201:
|
|
avio_read(pb, sequence->data_definition_ul, 16);
|
|
break;
|
|
case 0x1001:
|
|
sequence->structural_components_count = avio_rb32(pb);
|
|
if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
|
|
if (!sequence->structural_components_refs)
|
|
return -1;
|
|
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFPackage *package = arg;
|
|
switch(tag) {
|
|
case 0x4403:
|
|
package->tracks_count = avio_rb32(pb);
|
|
if (package->tracks_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
|
|
if (!package->tracks_refs)
|
|
return -1;
|
|
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
|
|
break;
|
|
case 0x4401:
|
|
/* UMID, only get last 16 bytes */
|
|
avio_skip(pb, 16);
|
|
avio_read(pb, package->package_uid, 16);
|
|
break;
|
|
case 0x4701:
|
|
avio_read(pb, package->descriptor_ref, 16);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_delta_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
|
|
{
|
|
int i, length;
|
|
|
|
segment->nb_delta_entries = avio_rb32(pb);
|
|
length = avio_rb32(pb);
|
|
|
|
if (!(segment->slice = av_calloc(segment->nb_delta_entries, sizeof(*segment->slice))) ||
|
|
!(segment->element_delta = av_calloc(segment->nb_delta_entries, sizeof(*segment->element_delta))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < segment->nb_delta_entries; i++) {
|
|
avio_r8(pb); /* PosTableIndex */
|
|
segment->slice[i] = avio_r8(pb);
|
|
segment->element_delta[i] = avio_rb32(pb);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
|
|
{
|
|
int i, j, length;
|
|
|
|
segment->nb_index_entries = avio_rb32(pb);
|
|
length = avio_rb32(pb);
|
|
|
|
if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
|
|
!(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
|
|
!(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (segment->slice_count &&
|
|
!(segment->slice_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->slice_offset_entries))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < segment->nb_index_entries; i++) {
|
|
segment->temporal_offset_entries[i] = avio_r8(pb);
|
|
avio_r8(pb); /* KeyFrameOffset */
|
|
segment->flag_entries[i] = avio_r8(pb);
|
|
segment->stream_offset_entries[i] = avio_rb64(pb);
|
|
if (segment->slice_count) {
|
|
if (!(segment->slice_offset_entries[i] = av_calloc(segment->slice_count, sizeof(**segment->slice_offset_entries))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (j = 0; j < segment->slice_count; j++)
|
|
segment->slice_offset_entries[i][j] = avio_rb32(pb);
|
|
}
|
|
|
|
avio_skip(pb, length - 11 - 4 * segment->slice_count);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFIndexTableSegment *segment = arg;
|
|
switch(tag) {
|
|
case 0x3F05:
|
|
segment->edit_unit_byte_count = avio_rb32(pb);
|
|
av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
|
|
break;
|
|
case 0x3F06:
|
|
segment->index_sid = avio_rb32(pb);
|
|
av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
|
|
break;
|
|
case 0x3F07:
|
|
segment->body_sid = avio_rb32(pb);
|
|
av_dlog(NULL, "BodySID %d\n", segment->body_sid);
|
|
break;
|
|
case 0x3F08:
|
|
segment->slice_count = avio_r8(pb);
|
|
av_dlog(NULL, "SliceCount %d\n", segment->slice_count);
|
|
break;
|
|
case 0x3F09:
|
|
av_dlog(NULL, "DeltaEntryArray found\n");
|
|
return mxf_read_delta_entry_array(pb, segment);
|
|
case 0x3F0A:
|
|
av_dlog(NULL, "IndexEntryArray found\n");
|
|
return mxf_read_index_entry_array(pb, segment);
|
|
case 0x3F0B:
|
|
segment->index_edit_rate.num = avio_rb32(pb);
|
|
segment->index_edit_rate.den = avio_rb32(pb);
|
|
av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
|
|
segment->index_edit_rate.den);
|
|
break;
|
|
case 0x3F0C:
|
|
segment->index_start_position = avio_rb64(pb);
|
|
av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
|
|
break;
|
|
case 0x3F0D:
|
|
segment->index_duration = avio_rb64(pb);
|
|
av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
|
|
{
|
|
int code, value, ofs = 0;
|
|
char layout[16] = {0};
|
|
|
|
do {
|
|
code = avio_r8(pb);
|
|
value = avio_r8(pb);
|
|
av_dlog(NULL, "pixel layout: code %#x\n", code);
|
|
|
|
if (ofs < 16) {
|
|
layout[ofs++] = code;
|
|
layout[ofs++] = value;
|
|
}
|
|
} while (code != 0); /* SMPTE 377M E.2.46 */
|
|
|
|
ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
|
|
}
|
|
|
|
static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
|
|
{
|
|
MXFDescriptor *descriptor = arg;
|
|
switch(tag) {
|
|
case 0x3F01:
|
|
descriptor->sub_descriptors_count = avio_rb32(pb);
|
|
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
|
|
if (!descriptor->sub_descriptors_refs)
|
|
return -1;
|
|
avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
|
|
break;
|
|
case 0x3004:
|
|
avio_read(pb, descriptor->essence_container_ul, 16);
|
|
break;
|
|
case 0x3006:
|
|
descriptor->linked_track_id = avio_rb32(pb);
|
|
break;
|
|
case 0x3201: /* PictureEssenceCoding */
|
|
avio_read(pb, descriptor->essence_codec_ul, 16);
|
|
break;
|
|
case 0x3203:
|
|
descriptor->width = avio_rb32(pb);
|
|
break;
|
|
case 0x3202:
|
|
descriptor->height = avio_rb32(pb);
|
|
break;
|
|
case 0x320E:
|
|
descriptor->aspect_ratio.num = avio_rb32(pb);
|
|
descriptor->aspect_ratio.den = avio_rb32(pb);
|
|
break;
|
|
case 0x3D03:
|
|
descriptor->sample_rate.num = avio_rb32(pb);
|
|
descriptor->sample_rate.den = avio_rb32(pb);
|
|
break;
|
|
case 0x3D06: /* SoundEssenceCompression */
|
|
avio_read(pb, descriptor->essence_codec_ul, 16);
|
|
break;
|
|
case 0x3D07:
|
|
descriptor->channels = avio_rb32(pb);
|
|
break;
|
|
case 0x3D01:
|
|
descriptor->bits_per_sample = avio_rb32(pb);
|
|
break;
|
|
case 0x3401:
|
|
mxf_read_pixel_layout(pb, descriptor);
|
|
break;
|
|
default:
|
|
/* Private uid used by SONY C0023S01.mxf */
|
|
if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
|
|
descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!descriptor->extradata)
|
|
return -1;
|
|
descriptor->extradata_size = size;
|
|
avio_read(pb, descriptor->extradata, size);
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Match an uid independently of the version byte and up to len common bytes
|
|
* Returns: boolean
|
|
*/
|
|
static int mxf_match_uid(const UID key, const UID uid, int len)
|
|
{
|
|
int i;
|
|
for (i = 0; i < len; i++) {
|
|
if (i != 7 && key[i] != uid[i])
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
|
|
{
|
|
while (uls->uid[0]) {
|
|
if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
|
|
break;
|
|
uls++;
|
|
}
|
|
return uls;
|
|
}
|
|
|
|
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
|
|
{
|
|
int i;
|
|
|
|
if (!strong_ref)
|
|
return NULL;
|
|
for (i = 0; i < mxf->metadata_sets_count; i++) {
|
|
if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
|
|
(type == AnyType || mxf->metadata_sets[i]->type == type)) {
|
|
return mxf->metadata_sets[i];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static const MXFCodecUL mxf_essence_container_uls[] = {
|
|
// video essence container uls
|
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
|
|
// sound essence container uls
|
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
|
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
|
|
};
|
|
|
|
static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
|
|
{
|
|
int i, j, nb_segments = 0;
|
|
MXFIndexTableSegment **unsorted_segments;
|
|
int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
|
|
|
|
/* count number of segments, allocate arrays and copy unsorted segments */
|
|
for (i = 0; i < mxf->metadata_sets_count; i++)
|
|
if (mxf->metadata_sets[i]->type == IndexTableSegment)
|
|
nb_segments++;
|
|
|
|
if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
|
|
!(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
|
|
av_free(unsorted_segments);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
for (i = j = 0; i < mxf->metadata_sets_count; i++)
|
|
if (mxf->metadata_sets[i]->type == IndexTableSegment)
|
|
unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
|
|
|
|
*nb_sorted_segments = 0;
|
|
|
|
/* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
|
|
for (i = 0; i < nb_segments; i++) {
|
|
int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
|
|
|
|
for (j = 0; j < nb_segments; j++) {
|
|
MXFIndexTableSegment *s = unsorted_segments[j];
|
|
|
|
/* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
|
|
* We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
|
|
*/
|
|
if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
|
|
(best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
|
|
best = j;
|
|
best_body_sid = s->body_sid;
|
|
best_index_sid = s->index_sid;
|
|
best_index_start = s->index_start_position;
|
|
}
|
|
}
|
|
|
|
/* no suitable entry found -> we're done */
|
|
if (best == -1)
|
|
break;
|
|
|
|
(*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
|
|
last_body_sid = best_body_sid;
|
|
last_index_sid = best_index_sid;
|
|
last_index_start = best_index_start;
|
|
}
|
|
|
|
av_free(unsorted_segments);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_parse_index(MXFContext *mxf, int i, AVStream *st)
|
|
{
|
|
int64_t accumulated_offset = 0;
|
|
int j, k, ret, nb_sorted_segments;
|
|
MXFIndexTableSegment **sorted_segments;
|
|
|
|
if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)))
|
|
return ret;
|
|
|
|
for (j = 0; j < nb_sorted_segments; j++) {
|
|
int n_delta = i;
|
|
int duration, sample_duration = 1, last_sample_size = 0;
|
|
int64_t segment_size;
|
|
MXFIndexTableSegment *tableseg = sorted_segments[j];
|
|
|
|
/* reset accumulated_offset on BodySID change */
|
|
if (j > 0 && tableseg->body_sid != sorted_segments[j-1]->body_sid)
|
|
accumulated_offset = 0;
|
|
|
|
/* HACK: How to correctly link between streams and slices? */
|
|
if (i < mxf->system_item + st->index)
|
|
n_delta++;
|
|
if (n_delta >= tableseg->nb_delta_entries && st->index != 0)
|
|
continue;
|
|
duration = tableseg->index_duration > 0 ? tableseg->index_duration :
|
|
st->duration - st->nb_index_entries;
|
|
segment_size = tableseg->edit_unit_byte_count * duration;
|
|
/* check small EditUnitByteCount for audio */
|
|
if (tableseg->edit_unit_byte_count && tableseg->edit_unit_byte_count < 32
|
|
&& !tableseg->index_duration) {
|
|
/* duration might be prime relative to the new sample_duration,
|
|
* which means we need to handle the last frame differently */
|
|
sample_duration = 8192;
|
|
last_sample_size = (duration % sample_duration) * tableseg->edit_unit_byte_count;
|
|
tableseg->edit_unit_byte_count *= sample_duration;
|
|
duration /= sample_duration;
|
|
if (last_sample_size) duration++;
|
|
}
|
|
|
|
for (k = 0; k < duration; k++) {
|
|
int64_t pos;
|
|
int size, flags = 0;
|
|
|
|
if (k < tableseg->nb_index_entries) {
|
|
pos = tableseg->stream_offset_entries[k];
|
|
if (n_delta < tableseg->nb_delta_entries) {
|
|
if (n_delta < tableseg->nb_delta_entries - 1) {
|
|
size =
|
|
tableseg->slice_offset_entries[k][tableseg->slice[n_delta+1]-1] +
|
|
tableseg->element_delta[n_delta+1] -
|
|
tableseg->element_delta[n_delta];
|
|
if (tableseg->slice[n_delta] > 0)
|
|
size -= tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
|
|
} else if (k < duration - 1) {
|
|
size = tableseg->stream_offset_entries[k+1] -
|
|
tableseg->stream_offset_entries[k] -
|
|
tableseg->slice_offset_entries[k][tableseg->slice[tableseg->nb_delta_entries-1]-1] -
|
|
tableseg->element_delta[tableseg->nb_delta_entries-1];
|
|
} else
|
|
size = 0;
|
|
if (tableseg->slice[n_delta] > 0)
|
|
pos += tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
|
|
pos += tableseg->element_delta[n_delta];
|
|
} else
|
|
size = 0;
|
|
flags = !(tableseg->flag_entries[k] & 0x30) ? AVINDEX_KEYFRAME : 0;
|
|
} else {
|
|
pos = (int64_t)k * tableseg->edit_unit_byte_count + accumulated_offset;
|
|
if (n_delta < tableseg->nb_delta_entries - 1)
|
|
size = tableseg->element_delta[n_delta+1] - tableseg->element_delta[n_delta];
|
|
else {
|
|
/* use smaller size for last sample if we should */
|
|
if (last_sample_size && k == duration - 1)
|
|
size = last_sample_size;
|
|
else
|
|
size = tableseg->edit_unit_byte_count;
|
|
if (tableseg->nb_delta_entries)
|
|
size -= tableseg->element_delta[tableseg->nb_delta_entries-1];
|
|
}
|
|
if (n_delta < tableseg->nb_delta_entries)
|
|
pos += tableseg->element_delta[n_delta];
|
|
flags = AVINDEX_KEYFRAME;
|
|
}
|
|
|
|
if (k > 0 && pos < mxf->first_essence_length && accumulated_offset == 0)
|
|
pos += mxf->first_essence_kl_length;
|
|
|
|
pos += mxf->essence_offset;
|
|
|
|
av_dlog(mxf->fc, "Stream %d IndexEntry %d n_Delta %d Offset %"PRIx64" Timestamp %"PRId64"\n",
|
|
st->index, st->nb_index_entries, n_delta, pos, sample_duration * st->nb_index_entries);
|
|
|
|
if ((ret = av_add_index_entry(st, pos, sample_duration * st->nb_index_entries, size, 0, flags)) < 0)
|
|
return ret;
|
|
}
|
|
accumulated_offset += segment_size;
|
|
}
|
|
|
|
av_free(sorted_segments);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_parse_structural_metadata(MXFContext *mxf)
|
|
{
|
|
MXFPackage *material_package = NULL;
|
|
MXFPackage *temp_package = NULL;
|
|
int i, j, k, ret;
|
|
|
|
av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
|
|
/* TODO: handle multiple material packages (OP3x) */
|
|
for (i = 0; i < mxf->packages_count; i++) {
|
|
material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
|
|
if (material_package) break;
|
|
}
|
|
if (!material_package) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < material_package->tracks_count; i++) {
|
|
MXFPackage *source_package = NULL;
|
|
MXFTrack *material_track = NULL;
|
|
MXFTrack *source_track = NULL;
|
|
MXFTrack *temp_track = NULL;
|
|
MXFDescriptor *descriptor = NULL;
|
|
MXFStructuralComponent *component = NULL;
|
|
UID *essence_container_ul = NULL;
|
|
const MXFCodecUL *codec_ul = NULL;
|
|
const MXFCodecUL *container_ul = NULL;
|
|
AVStream *st;
|
|
|
|
if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
|
|
continue;
|
|
}
|
|
|
|
if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
|
|
continue;
|
|
}
|
|
|
|
/* TODO: handle multiple source clips */
|
|
for (j = 0; j < material_track->sequence->structural_components_count; j++) {
|
|
/* TODO: handle timecode component */
|
|
component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
|
|
if (!component)
|
|
continue;
|
|
|
|
for (k = 0; k < mxf->packages_count; k++) {
|
|
temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
|
|
if (!temp_package)
|
|
continue;
|
|
if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
|
|
source_package = temp_package;
|
|
break;
|
|
}
|
|
}
|
|
if (!source_package) {
|
|
av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
|
|
break;
|
|
}
|
|
for (k = 0; k < source_package->tracks_count; k++) {
|
|
if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
|
|
return -1;
|
|
}
|
|
if (temp_track->track_id == component->source_track_id) {
|
|
source_track = temp_track;
|
|
break;
|
|
}
|
|
}
|
|
if (!source_track) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
|
|
break;
|
|
}
|
|
}
|
|
if (!source_track)
|
|
continue;
|
|
|
|
if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
|
|
return -1;
|
|
}
|
|
|
|
/* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
|
|
* This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
|
|
if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
|
|
continue;
|
|
}
|
|
|
|
st = avformat_new_stream(mxf->fc, NULL);
|
|
if (!st) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
|
|
return -1;
|
|
}
|
|
st->id = source_track->track_id;
|
|
st->priv_data = source_track;
|
|
st->duration = component->duration;
|
|
if (st->duration == -1)
|
|
st->duration = AV_NOPTS_VALUE;
|
|
st->start_time = component->start_position;
|
|
avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
|
|
|
|
PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
|
|
codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
|
|
st->codec->codec_type = codec_ul->id;
|
|
|
|
source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
|
|
if (source_package->descriptor) {
|
|
if (source_package->descriptor->type == MultipleDescriptor) {
|
|
for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
|
|
MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
|
|
|
|
if (!sub_descriptor) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
|
|
continue;
|
|
}
|
|
if (sub_descriptor->linked_track_id == source_track->track_id) {
|
|
descriptor = sub_descriptor;
|
|
break;
|
|
}
|
|
}
|
|
} else if (source_package->descriptor->type == Descriptor)
|
|
descriptor = source_package->descriptor;
|
|
}
|
|
if (!descriptor) {
|
|
av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
|
|
continue;
|
|
}
|
|
PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
|
|
PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
|
|
essence_container_ul = &descriptor->essence_container_ul;
|
|
/* HACK: replacing the original key with mxf_encrypted_essence_container
|
|
* is not allowed according to s429-6, try to find correct information anyway */
|
|
if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
|
|
av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
|
|
for (k = 0; k < mxf->metadata_sets_count; k++) {
|
|
MXFMetadataSet *metadata = mxf->metadata_sets[k];
|
|
if (metadata->type == CryptoContext) {
|
|
essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
|
|
codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
|
|
st->codec->codec_id = codec_ul->id;
|
|
if (descriptor->extradata) {
|
|
st->codec->extradata = descriptor->extradata;
|
|
st->codec->extradata_size = descriptor->extradata_size;
|
|
}
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
st->codec->codec_id = container_ul->id;
|
|
st->codec->width = descriptor->width;
|
|
st->codec->height = descriptor->height;
|
|
if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
|
|
st->codec->pix_fmt = descriptor->pix_fmt;
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
st->codec->codec_id = container_ul->id;
|
|
st->codec->channels = descriptor->channels;
|
|
st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
|
|
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
|
|
/* TODO: implement CODEC_ID_RAWAUDIO */
|
|
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
|
|
if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
|
|
st->codec->codec_id = CODEC_ID_PCM_S24LE;
|
|
else if (descriptor->bits_per_sample == 32)
|
|
st->codec->codec_id = CODEC_ID_PCM_S32LE;
|
|
} else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
|
|
if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
|
|
st->codec->codec_id = CODEC_ID_PCM_S24BE;
|
|
else if (descriptor->bits_per_sample == 32)
|
|
st->codec->codec_id = CODEC_ID_PCM_S32BE;
|
|
} else if (st->codec->codec_id == CODEC_ID_MP2) {
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
}
|
|
}
|
|
if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
|
|
av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
}
|
|
|
|
if ((ret = mxf_parse_index(mxf, i, st)))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
|
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
|
|
};
|
|
|
|
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
|
|
{
|
|
AVIOContext *pb = mxf->fc->pb;
|
|
MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
|
|
uint64_t klv_end = avio_tell(pb) + klv->length;
|
|
|
|
if (!ctx)
|
|
return -1;
|
|
while (avio_tell(pb) + 4 < klv_end) {
|
|
int tag = avio_rb16(pb);
|
|
int size = avio_rb16(pb); /* KLV specified by 0x53 */
|
|
uint64_t next = avio_tell(pb) + size;
|
|
UID uid = {0};
|
|
|
|
av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
|
|
if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
|
|
av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
|
|
continue;
|
|
}
|
|
if (tag > 0x7FFF) { /* dynamic tag */
|
|
int i;
|
|
for (i = 0; i < mxf->local_tags_count; i++) {
|
|
int local_tag = AV_RB16(mxf->local_tags+i*18);
|
|
if (local_tag == tag) {
|
|
memcpy(uid, mxf->local_tags+i*18+2, 16);
|
|
av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
|
|
PRINT_KEY(mxf->fc, "uid", uid);
|
|
}
|
|
}
|
|
}
|
|
if (ctx_size && tag == 0x3C0A)
|
|
avio_read(pb, ctx->uid, 16);
|
|
else if (read_child(ctx, pb, tag, size, uid, -1) < 0)
|
|
return -1;
|
|
|
|
avio_seek(pb, next, SEEK_SET);
|
|
}
|
|
if (ctx_size) ctx->type = type;
|
|
return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
|
|
}
|
|
|
|
/**
|
|
* Seeks to the previous partition, if possible
|
|
* @return <= 0 if we should stop parsing, > 0 if we should keep going
|
|
*/
|
|
static int mxf_seek_to_previous_partition(MXFContext *mxf)
|
|
{
|
|
AVIOContext *pb = mxf->fc->pb;
|
|
|
|
if (!mxf->current_partition ||
|
|
mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
|
|
return 0; /* we've parsed all partitions */
|
|
|
|
/* seek to previous partition */
|
|
avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
|
|
mxf->current_partition = NULL;
|
|
|
|
av_dlog(mxf->fc, "seeking to previous partition\n");
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Called when essence is encountered
|
|
* @return <= 0 if we should stop parsing, > 0 if we should keep going
|
|
*/
|
|
static int mxf_parse_handle_essence(MXFContext *mxf)
|
|
{
|
|
AVIOContext *pb = mxf->fc->pb;
|
|
int64_t ret;
|
|
|
|
if (!mxf->current_partition) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to PartitionPack\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (mxf->parsing_backward) {
|
|
return mxf_seek_to_previous_partition(mxf);
|
|
} else {
|
|
if (!mxf->footer_partition) {
|
|
av_dlog(mxf->fc, "no footer\n");
|
|
return 0;
|
|
}
|
|
|
|
av_dlog(mxf->fc, "seeking to footer\n");
|
|
|
|
/* remember where we were so we don't end up seeking further back than this */
|
|
mxf->last_forward_tell = avio_tell(pb);
|
|
|
|
if (!pb->seekable) {
|
|
av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
|
|
return -1;
|
|
}
|
|
|
|
/* seek to footer partition and parse backward */
|
|
if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
|
|
mxf->run_in + mxf->footer_partition, ret);
|
|
return ret;
|
|
}
|
|
|
|
mxf->current_partition = NULL;
|
|
mxf->parsing_backward = 1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Called when the next partition or EOF is encountered
|
|
* @return <= 0 if we should stop parsing, > 0 if we should keep going
|
|
*/
|
|
static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
|
|
{
|
|
return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
|
|
}
|
|
|
|
/**
|
|
* Figures out the proper offset and length of the essence container in each partition
|
|
*/
|
|
static void mxf_compute_essence_containers(MXFContext *mxf)
|
|
{
|
|
int x;
|
|
|
|
/* everything is already correct */
|
|
if (mxf->op == OPAtom)
|
|
return;
|
|
|
|
for (x = 0; x < mxf->partitions_count; x++) {
|
|
MXFPartition *p = &mxf->partitions[x];
|
|
|
|
if (!p->body_sid)
|
|
continue; /* BodySID == 0 -> no essence */
|
|
|
|
if (x >= mxf->partitions_count - 1)
|
|
break; /* last partition - can't compute length (and we don't need to) */
|
|
|
|
/* essence container spans to the next partition */
|
|
p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
|
|
|
|
if (p->essence_length < 0) {
|
|
/* next ThisPartition < essence_offset */
|
|
p->essence_length = 0;
|
|
av_log(mxf->fc, AV_LOG_ERROR, "partition %i: bad ThisPartition = %lx\n",
|
|
x+1, mxf->partitions[x+1].this_partition);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int64_t round_to_kag(int64_t position, int kag_size)
|
|
{
|
|
/* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
|
|
/* NOTE: kag_size may be any integer between 1 - 2^10 */
|
|
int64_t ret = (position / kag_size) * kag_size;
|
|
return ret == position ? ret : ret + kag_size;
|
|
}
|
|
|
|
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
MXFContext *mxf = s->priv_data;
|
|
KLVPacket klv;
|
|
|
|
mxf->last_forward_tell = INT64_MAX;
|
|
|
|
if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
|
|
av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
|
|
return -1;
|
|
}
|
|
avio_seek(s->pb, -14, SEEK_CUR);
|
|
mxf->fc = s;
|
|
mxf->run_in = avio_tell(s->pb);
|
|
|
|
while (!url_feof(s->pb)) {
|
|
const MXFMetadataReadTableEntry *metadata;
|
|
|
|
if (klv_read_packet(&klv, s->pb) < 0) {
|
|
/* EOF - seek to previous partition or stop */
|
|
if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
|
|
break;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
PRINT_KEY(s, "read header", klv.key);
|
|
av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
|
|
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
|
|
IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
|
|
IS_KLV_KEY(klv.key, mxf_system_item_key)) {
|
|
if (!mxf->current_partition->essence_offset) {
|
|
/* for OP1a we compute essence_offset
|
|
* for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
|
|
* TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
|
|
* for OPAtom we still need the actual essence_offset though (the KL's length can vary)
|
|
*/
|
|
int64_t op1a_essence_offset =
|
|
round_to_kag(mxf->current_partition->this_partition +
|
|
mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
|
|
round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
|
|
round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
|
|
|
|
if (mxf->op == OPAtom) {
|
|
/* point essence_offset to the actual data
|
|
* OPAtom has all the essence in one big KLV
|
|
*/
|
|
mxf->current_partition->essence_offset = avio_tell(s->pb);
|
|
mxf->current_partition->essence_length = klv.length;
|
|
} else {
|
|
/* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
|
|
mxf->current_partition->essence_offset = op1a_essence_offset;
|
|
}
|
|
}
|
|
|
|
if (IS_KLV_KEY(klv.key, mxf_system_item_key)) {
|
|
mxf->system_item = 1;
|
|
}
|
|
|
|
if (!mxf->essence_offset)
|
|
mxf->essence_offset = klv.offset;
|
|
|
|
if (!mxf->first_essence_kl_length && IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
|
|
mxf->first_essence_kl_length = avio_tell(s->pb) - klv.offset;
|
|
mxf->first_essence_length = klv.length;
|
|
}
|
|
|
|
/* seek to footer, previous partition or stop */
|
|
if (mxf_parse_handle_essence(mxf) <= 0)
|
|
break;
|
|
continue;
|
|
} else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
|
|
klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
|
|
/* next partition pack - keep going, seek to previous partition or stop */
|
|
if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
|
|
break;
|
|
}
|
|
|
|
for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
|
|
if (IS_KLV_KEY(klv.key, metadata->key)) {
|
|
int res;
|
|
if (klv.key[5] == 0x53) {
|
|
res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
|
|
} else {
|
|
uint64_t next = avio_tell(s->pb) + klv.length;
|
|
res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
|
|
avio_seek(s->pb, next, SEEK_SET);
|
|
}
|
|
if (res < 0) {
|
|
av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!metadata->read)
|
|
avio_skip(s->pb, klv.length);
|
|
}
|
|
/* FIXME avoid seek */
|
|
if (!mxf->essence_offset) {
|
|
av_log(s, AV_LOG_ERROR, "no essence\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_seek(s->pb, mxf->essence_offset, SEEK_SET);
|
|
|
|
mxf_compute_essence_containers(mxf);
|
|
|
|
return mxf_parse_structural_metadata(mxf);
|
|
}
|
|
|
|
static int mxf_read_close(AVFormatContext *s)
|
|
{
|
|
MXFContext *mxf = s->priv_data;
|
|
MXFIndexTableSegment *seg;
|
|
int i, j;
|
|
|
|
av_freep(&mxf->packages_refs);
|
|
|
|
for (i = 0; i < s->nb_streams; i++)
|
|
s->streams[i]->priv_data = NULL;
|
|
|
|
for (i = 0; i < mxf->metadata_sets_count; i++) {
|
|
switch (mxf->metadata_sets[i]->type) {
|
|
case MultipleDescriptor:
|
|
av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
|
|
break;
|
|
case Sequence:
|
|
av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
|
|
break;
|
|
case SourcePackage:
|
|
case MaterialPackage:
|
|
av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
|
|
break;
|
|
case IndexTableSegment:
|
|
seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
|
|
for (j = 0; j < seg->nb_index_entries; j++)
|
|
av_freep(&seg->slice_offset_entries[j]);
|
|
av_freep(&seg->slice);
|
|
av_freep(&seg->element_delta);
|
|
av_freep(&seg->temporal_offset_entries);
|
|
av_freep(&seg->flag_entries);
|
|
av_freep(&seg->stream_offset_entries);
|
|
av_freep(&seg->slice_offset_entries);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
av_freep(&mxf->metadata_sets[i]);
|
|
}
|
|
av_freep(&mxf->partitions);
|
|
av_freep(&mxf->metadata_sets);
|
|
av_freep(&mxf->aesc);
|
|
av_freep(&mxf->local_tags);
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_probe(AVProbeData *p) {
|
|
uint8_t *bufp = p->buf;
|
|
uint8_t *end = p->buf + p->buf_size;
|
|
|
|
if (p->buf_size < sizeof(mxf_header_partition_pack_key))
|
|
return 0;
|
|
|
|
/* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
|
|
end -= sizeof(mxf_header_partition_pack_key);
|
|
for (; bufp < end; bufp++) {
|
|
if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* rudimentary byte seek */
|
|
/* XXX: use MXF Index */
|
|
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
int64_t seconds;
|
|
|
|
if (!s->bit_rate)
|
|
return -1;
|
|
if (sample_time < 0)
|
|
sample_time = 0;
|
|
seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
|
|
if (avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET) < 0)
|
|
return -1;
|
|
ff_update_cur_dts(s, st, sample_time);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_mxf_demuxer = {
|
|
.name = "mxf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
|
|
.priv_data_size = sizeof(MXFContext),
|
|
.read_probe = mxf_probe,
|
|
.read_header = mxf_read_header,
|
|
.read_packet = mxf_read_packet,
|
|
.read_close = mxf_read_close,
|
|
.read_seek = mxf_read_seek,
|
|
};
|