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2259 lines
85 KiB
2259 lines
85 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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/* |
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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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|
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//#define DEBUG |
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|
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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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|
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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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|
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typedef enum { |
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OP1a = 1, |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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int intra_only; |
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} MXFTrack; |
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|
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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; /* Field height, not frame height */ |
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int frame_layout; /* See MXFFrameLayout enum */ |
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int channels; |
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int bits_per_sample; |
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unsigned int component_depth; |
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unsigned int horiz_subsampling; |
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unsigned int vert_subsampling; |
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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 AVPixelFormat pix_fmt; |
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} MXFDescriptor; |
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|
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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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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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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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int nb_index_entries; |
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} MXFIndexTableSegment; |
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|
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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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|
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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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|
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/* decoded index table */ |
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typedef struct { |
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int index_sid; |
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int body_sid; |
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int nb_ptses; /* number of PTSes or total duration of index */ |
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int64_t first_dts; /* DTS = EditUnit + first_dts */ |
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int64_t *ptses; /* maps EditUnit -> PTS */ |
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int nb_segments; |
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MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */ |
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AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */ |
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} MXFIndexTable; |
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|
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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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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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int current_edit_unit; |
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int nb_index_tables; |
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MXFIndexTable *index_tables; |
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int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom) |
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} MXFContext; |
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|
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enum MXFWrappingScheme { |
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Frame, |
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Clip, |
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}; |
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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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|
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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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|
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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_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 }; |
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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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|
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#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y))) |
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|
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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 AVERROR_INVALIDDATA; |
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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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|
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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 && !pb->eof_reached; 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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|
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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 AVERROR_INVALIDDATA; |
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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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|
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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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|
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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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|
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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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|
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if (length > 61444) /* worst case PAL 1920 samples 8 channels */ |
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return AVERROR_INVALIDDATA; |
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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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|
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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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|
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if (!mxf->aesc && s->key && s->keylen == 16) { |
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mxf->aesc = av_aes_alloc(); |
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if (!mxf->aesc) |
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return AVERROR(ENOMEM); |
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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 AVERROR_INVALIDDATA; |
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index = mxf_get_stream_index(s, klv); |
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if (index < 0) |
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return AVERROR_INVALIDDATA; |
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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 AVERROR_INVALIDDATA; |
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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 AVERROR_INVALIDDATA; |
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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_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_ask_for_sample(pb, "unsupported primer pack item length %d\n", |
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item_len); |
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return AVERROR_PATCHWELCOME; |
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} |
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if (item_num > UINT_MAX / item_len) |
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return AVERROR_INVALIDDATA; |
|
mxf->local_tags_count = item_num; |
|
mxf->local_tags = av_malloc(item_num*item_len); |
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if (!mxf->local_tags) |
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return AVERROR(ENOMEM); |
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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, *tmp_part; |
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UID op; |
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uint64_t footer_partition; |
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uint32_t nb_essence_containers; |
|
|
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if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions)) |
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return AVERROR(ENOMEM); |
|
|
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tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions)); |
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if (!tmp_part) |
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return AVERROR(ENOMEM); |
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mxf->partitions = tmp_part; |
|
|
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if (mxf->parsing_backward) { |
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/* insert the new partition pack in the middle |
|
* this makes the entries in mxf->partitions sorted by offset */ |
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memmove(&mxf->partitions[mxf->last_forward_partition+1], |
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&mxf->partitions[mxf->last_forward_partition], |
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(mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions)); |
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partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition]; |
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} else { |
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mxf->last_forward_partition++; |
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partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count]; |
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} |
|
|
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memset(partition, 0, sizeof(*partition)); |
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mxf->partitions_count++; |
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partition->pack_length = avio_tell(pb) - klv_offset + size; |
|
|
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switch(uid[13]) { |
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case 2: |
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partition->type = Header; |
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break; |
|
case 3: |
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partition->type = BodyPartition; |
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break; |
|
case 4: |
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partition->type = Footer; |
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break; |
|
default: |
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av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]); |
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return AVERROR_INVALIDDATA; |
|
} |
|
|
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/* 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); |
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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); |
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avio_skip(pb, 8); |
|
partition->body_sid = avio_rb32(pb); |
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avio_read(pb, op, sizeof(UID)); |
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nb_essence_containers = avio_rb32(pb); |
|
|
|
/* 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: %"PRIu64" != %"PRIu64"\n", |
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mxf->footer_partition, footer_partition); |
|
} else { |
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mxf->footer_partition = footer_partition; |
|
} |
|
} |
|
|
|
av_dlog(mxf->fc, |
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"PartitionPack: ThisPartition = 0x%"PRIX64 |
|
", PreviousPartition = 0x%"PRIX64", " |
|
"FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n", |
|
partition->this_partition, |
|
partition->previous_partition, footer_partition, |
|
partition->index_sid, partition->body_sid); |
|
|
|
/* sanity check PreviousPartition if set */ |
|
if (partition->previous_partition && |
|
mxf->run_in + partition->previous_partition >= klv_offset) { |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"PreviousPartition points to this partition or forward\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
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] == 64&& op[13] == 1) mxf->op = OPSonyOpt; |
|
else if (op[12] == 0x10) { |
|
/* SMPTE 390m: "There shall be exactly one essence container" |
|
* The following block deals with files that violate this, namely: |
|
* 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a |
|
* abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */ |
|
if (nb_essence_containers != 1) { |
|
MXFOP op = nb_essence_containers ? OP1a : OPAtom; |
|
|
|
/* only nag once */ |
|
if (!mxf->op) |
|
av_log(mxf->fc, AV_LOG_WARNING, |
|
"\"OPAtom\" with %u ECs - assuming %s\n", |
|
nb_essence_containers, |
|
op == OP1a ? "OP1a" : "OPAtom"); |
|
|
|
mxf->op = op; |
|
} else |
|
mxf->op = OPAtom; |
|
} 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) |
|
{ |
|
MXFMetadataSet **tmp; |
|
if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets)) |
|
return AVERROR(ENOMEM); |
|
tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); |
|
if (!tmp) |
|
return AVERROR(ENOMEM); |
|
mxf->metadata_sets = tmp; |
|
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 AVERROR_INVALIDDATA; |
|
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 AVERROR_INVALIDDATA; |
|
mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID)); |
|
if (!mxf->packages_refs) |
|
return AVERROR(ENOMEM); |
|
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 AVERROR_INVALIDDATA; |
|
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); |
|
if (!package->tracks_refs) |
|
return AVERROR(ENOMEM); |
|
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.num = avio_rb32(pb); |
|
track->edit_rate.den = 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 AVERROR_INVALIDDATA; |
|
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID)); |
|
if (!sequence->structural_components_refs) |
|
return AVERROR(ENOMEM); |
|
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 AVERROR_INVALIDDATA; |
|
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); |
|
if (!package->tracks_refs) |
|
return AVERROR(ENOMEM); |
|
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_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment) |
|
{ |
|
int i, length; |
|
|
|
segment->nb_index_entries = avio_rb32(pb); |
|
if (!segment->nb_index_entries) |
|
return 0; |
|
else if (segment->nb_index_entries < 0 || |
|
segment->nb_index_entries > |
|
(INT_MAX / sizeof(*segment->stream_offset_entries))) |
|
return AVERROR(ENOMEM); |
|
|
|
length = avio_rb32(pb); |
|
|
|
segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries * |
|
sizeof(*segment->temporal_offset_entries)); |
|
segment->flag_entries = av_mallocz(segment->nb_index_entries * |
|
sizeof(*segment->flag_entries)); |
|
segment->stream_offset_entries = av_mallocz(segment->nb_index_entries * |
|
sizeof(*segment->stream_offset_entries)); |
|
|
|
if (!segment->flag_entries || !segment->stream_offset_entries || |
|
!segment->temporal_offset_entries) { |
|
av_freep(&segment->flag_entries); |
|
av_freep(&segment->stream_offset_entries); |
|
av_freep(&segment->temporal_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); |
|
avio_skip(pb, length - 11); |
|
} |
|
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 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; |
|
descriptor->pix_fmt = AV_PIX_FMT_NONE; |
|
switch(tag) { |
|
case 0x3F01: |
|
descriptor->sub_descriptors_count = avio_rb32(pb); |
|
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID)) |
|
return AVERROR_INVALIDDATA; |
|
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID)); |
|
if (!descriptor->sub_descriptors_refs) |
|
return AVERROR(ENOMEM); |
|
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 0x320C: |
|
descriptor->frame_layout = avio_r8(pb); |
|
break; |
|
case 0x320E: |
|
descriptor->aspect_ratio.num = avio_rb32(pb); |
|
descriptor->aspect_ratio.den = avio_rb32(pb); |
|
break; |
|
case 0x3301: |
|
descriptor->component_depth = avio_rb32(pb); |
|
break; |
|
case 0x3302: |
|
descriptor->horiz_subsampling = avio_rb32(pb); |
|
break; |
|
case 0x3308: |
|
descriptor->vert_subsampling = 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 AVERROR(ENOMEM); |
|
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_picture_essence_container_uls[] = { |
|
// video essence container uls |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */ |
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, |
|
}; |
|
|
|
/* EC ULs for intra-only formats */ |
|
static const MXFCodecUL mxf_intra_only_essence_container_uls[] = { |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */ |
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, |
|
}; |
|
|
|
/* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */ |
|
static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = { |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */ |
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, |
|
}; |
|
|
|
static const MXFCodecUL mxf_sound_essence_container_uls[] = { |
|
// sound essence container uls |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ |
|
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_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, AV_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, AV_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, AV_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 (!nb_segments) |
|
return AVERROR_INVALIDDATA; |
|
|
|
*sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments)); |
|
unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments)); |
|
if (!*sorted_segments || !unsorted_segments) { |
|
av_freep(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; |
|
} |
|
|
|
/** |
|
* Computes the absolute file offset of the given essence container offset |
|
*/ |
|
static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out) |
|
{ |
|
int x; |
|
int64_t offset_in = offset; /* for logging */ |
|
|
|
for (x = 0; x < mxf->partitions_count; x++) { |
|
MXFPartition *p = &mxf->partitions[x]; |
|
|
|
if (p->body_sid != body_sid) |
|
continue; |
|
|
|
if (offset < p->essence_length || !p->essence_length) { |
|
*offset_out = p->essence_offset + offset; |
|
return 0; |
|
} |
|
|
|
offset -= p->essence_length; |
|
} |
|
|
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n", |
|
offset_in, body_sid); |
|
|
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/** |
|
* Returns the end position of the essence container with given BodySID, or zero if unknown |
|
*/ |
|
static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid) |
|
{ |
|
int x; |
|
int64_t ret = 0; |
|
|
|
for (x = 0; x < mxf->partitions_count; x++) { |
|
MXFPartition *p = &mxf->partitions[x]; |
|
|
|
if (p->body_sid != body_sid) |
|
continue; |
|
|
|
if (!p->essence_length) |
|
return 0; |
|
|
|
ret = p->essence_offset + p->essence_length; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* EditUnit -> absolute offset */ |
|
static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag) |
|
{ |
|
int i; |
|
int64_t offset_temp = 0; |
|
|
|
for (i = 0; i < index_table->nb_segments; i++) { |
|
MXFIndexTableSegment *s = index_table->segments[i]; |
|
|
|
edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */ |
|
|
|
if (edit_unit < s->index_start_position + s->index_duration) { |
|
int64_t index = edit_unit - s->index_start_position; |
|
|
|
if (s->edit_unit_byte_count) |
|
offset_temp += s->edit_unit_byte_count * index; |
|
else if (s->nb_index_entries) { |
|
if (s->nb_index_entries == 2 * s->index_duration + 1) |
|
index *= 2; /* Avid index */ |
|
|
|
if (index < 0 || index >= s->nb_index_entries) { |
|
av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n", |
|
index_table->index_sid, s->index_start_position); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
offset_temp = s->stream_offset_entries[index]; |
|
} else { |
|
av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n", |
|
index_table->index_sid, s->index_start_position); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (edit_unit_out) |
|
*edit_unit_out = edit_unit; |
|
|
|
return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out); |
|
} else { |
|
/* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */ |
|
offset_temp += s->edit_unit_byte_count * s->index_duration; |
|
} |
|
} |
|
|
|
if (nag) |
|
av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid); |
|
|
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table) |
|
{ |
|
int i, j, x; |
|
int8_t max_temporal_offset = -128; |
|
|
|
/* first compute how many entries we have */ |
|
for (i = 0; i < index_table->nb_segments; i++) { |
|
MXFIndexTableSegment *s = index_table->segments[i]; |
|
|
|
if (!s->nb_index_entries) { |
|
index_table->nb_ptses = 0; |
|
return 0; /* no TemporalOffsets */ |
|
} |
|
|
|
index_table->nb_ptses += s->index_duration; |
|
} |
|
|
|
/* paranoid check */ |
|
if (index_table->nb_ptses <= 0) |
|
return 0; |
|
|
|
if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry)) |
|
return AVERROR(ENOMEM); |
|
|
|
index_table->ptses = av_mallocz(index_table->nb_ptses * |
|
sizeof(int64_t)); |
|
index_table->fake_index = av_mallocz(index_table->nb_ptses * |
|
sizeof(AVIndexEntry)); |
|
if (!index_table->ptses || !index_table->fake_index) { |
|
av_freep(&index_table->ptses); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
/* we may have a few bad TemporalOffsets |
|
* make sure the corresponding PTSes don't have the bogus value 0 */ |
|
for (x = 0; x < index_table->nb_ptses; x++) |
|
index_table->ptses[x] = AV_NOPTS_VALUE; |
|
|
|
/** |
|
* We have this: |
|
* |
|
* x TemporalOffset |
|
* 0: 0 |
|
* 1: 1 |
|
* 2: 1 |
|
* 3: -2 |
|
* 4: 1 |
|
* 5: 1 |
|
* 6: -2 |
|
* |
|
* We want to transform it into this: |
|
* |
|
* x DTS PTS |
|
* 0: -1 0 |
|
* 1: 0 3 |
|
* 2: 1 1 |
|
* 3: 2 2 |
|
* 4: 3 6 |
|
* 5: 4 4 |
|
* 6: 5 5 |
|
* |
|
* We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses, |
|
* then settings mxf->first_dts = -max(TemporalOffset[x]). |
|
* The latter makes DTS <= PTS. |
|
*/ |
|
for (i = x = 0; i < index_table->nb_segments; i++) { |
|
MXFIndexTableSegment *s = index_table->segments[i]; |
|
int index_delta = 1; |
|
int n = s->nb_index_entries; |
|
|
|
if (s->nb_index_entries == 2 * s->index_duration + 1) { |
|
index_delta = 2; /* Avid index */ |
|
/* ignore the last entry - it's the size of the essence container */ |
|
n--; |
|
} |
|
|
|
for (j = 0; j < n; j += index_delta, x++) { |
|
int offset = s->temporal_offset_entries[j] / index_delta; |
|
int index = x + offset; |
|
|
|
if (x >= index_table->nb_ptses) { |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n", |
|
s->nb_index_entries, s->index_duration); |
|
break; |
|
} |
|
|
|
index_table->fake_index[x].timestamp = x; |
|
index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0; |
|
|
|
if (index < 0 || index >= index_table->nb_ptses) { |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"index entry %i + TemporalOffset %i = %i, which is out of bounds\n", |
|
x, offset, index); |
|
continue; |
|
} |
|
|
|
index_table->ptses[index] = x; |
|
max_temporal_offset = FFMAX(max_temporal_offset, offset); |
|
} |
|
} |
|
|
|
index_table->first_dts = -max_temporal_offset; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Sorts and collects index table segments into index tables. |
|
* Also computes PTSes if possible. |
|
*/ |
|
static int mxf_compute_index_tables(MXFContext *mxf) |
|
{ |
|
int i, j, k, ret, nb_sorted_segments; |
|
MXFIndexTableSegment **sorted_segments = NULL; |
|
|
|
if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) || |
|
nb_sorted_segments <= 0) { |
|
av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n"); |
|
return 0; |
|
} |
|
|
|
/* sanity check and count unique BodySIDs/IndexSIDs */ |
|
for (i = 0; i < nb_sorted_segments; i++) { |
|
if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) |
|
mxf->nb_index_tables++; |
|
else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) { |
|
av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n"); |
|
ret = AVERROR_INVALIDDATA; |
|
goto finish_decoding_index; |
|
} |
|
} |
|
|
|
if (mxf->nb_index_tables > INT_MAX / sizeof(MXFIndexTable) || |
|
!(mxf->index_tables = av_mallocz(mxf->nb_index_tables * |
|
sizeof(MXFIndexTable)))) { |
|
av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n"); |
|
ret = AVERROR(ENOMEM); |
|
goto finish_decoding_index; |
|
} |
|
|
|
/* distribute sorted segments to index tables */ |
|
for (i = j = 0; i < nb_sorted_segments; i++) { |
|
if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) { |
|
/* next IndexSID */ |
|
j++; |
|
} |
|
|
|
mxf->index_tables[j].nb_segments++; |
|
} |
|
|
|
for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) { |
|
MXFIndexTable *t = &mxf->index_tables[j]; |
|
|
|
if (t->nb_segments > |
|
(INT_MAX / sizeof(MXFIndexTableSegment *)) || |
|
!(t->segments = av_mallocz(t->nb_segments * |
|
sizeof(MXFIndexTableSegment*)))) { |
|
av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment" |
|
" pointer array\n"); |
|
ret = AVERROR(ENOMEM); |
|
goto finish_decoding_index; |
|
} |
|
|
|
if (sorted_segments[i]->index_start_position) |
|
av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n", |
|
sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position); |
|
|
|
memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*)); |
|
t->index_sid = sorted_segments[i]->index_sid; |
|
t->body_sid = sorted_segments[i]->body_sid; |
|
|
|
if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0) |
|
goto finish_decoding_index; |
|
|
|
/* fix zero IndexDurations */ |
|
for (k = 0; k < t->nb_segments; k++) { |
|
if (t->segments[k]->index_duration) |
|
continue; |
|
|
|
if (t->nb_segments > 1) |
|
av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n", |
|
t->index_sid, k); |
|
|
|
if (mxf->fc->nb_streams <= 0) { |
|
av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n"); |
|
break; |
|
} |
|
|
|
/* assume the first stream's duration is reasonable |
|
* leave index_duration = 0 on further segments in case we have any (unlikely) |
|
*/ |
|
t->segments[k]->index_duration = mxf->fc->streams[0]->duration; |
|
break; |
|
} |
|
} |
|
|
|
ret = 0; |
|
finish_decoding_index: |
|
av_free(sorted_segments); |
|
return ret; |
|
} |
|
|
|
static int mxf_is_intra_only(MXFDescriptor *d) |
|
{ |
|
return mxf_get_codec_ul(mxf_intra_only_essence_container_uls, |
|
&d->essence_container_ul)->id != AV_CODEC_ID_NONE || |
|
mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls, |
|
&d->essence_codec_ul)->id != AV_CODEC_ID_NONE; |
|
} |
|
|
|
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 AVERROR_INVALIDDATA; |
|
} |
|
|
|
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; |
|
const MXFCodecUL *pix_fmt_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"); |
|
ret = AVERROR_INVALIDDATA; |
|
goto fail_and_free; |
|
} |
|
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 || !component) |
|
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"); |
|
ret = AVERROR_INVALIDDATA; |
|
goto fail_and_free; |
|
} |
|
|
|
/* 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"); |
|
ret = AVERROR(ENOMEM); |
|
goto fail_and_free; |
|
} |
|
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.den, material_track->edit_rate.num); |
|
|
|
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) { |
|
source_track->intra_only = mxf_is_intra_only(descriptor); |
|
container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul); |
|
if (st->codec->codec_id == AV_CODEC_ID_NONE) |
|
st->codec->codec_id = container_ul->id; |
|
st->codec->width = descriptor->width; |
|
/* Field height, not frame height */ |
|
st->codec->height = descriptor->height; |
|
switch (descriptor->frame_layout) { |
|
case SegmentedFrame: |
|
/* This one is a weird layout I don't fully understand. */ |
|
av_log(mxf->fc, AV_LOG_INFO, |
|
"SegmentedFrame layout isn't currently supported\n"); |
|
break; |
|
case FullFrame: |
|
break; |
|
case OneField: |
|
/* Every other line is stored and needs to be duplicated. */ |
|
av_log(mxf->fc, AV_LOG_INFO, |
|
"OneField frame layout isn't currently supported\n"); |
|
break; |
|
/* The correct thing to do here is fall through, but by |
|
* breaking we might be able to decode some streams at half |
|
* the vertical resolution, rather than not al all. |
|
* It's also for compatibility with the old behavior. */ |
|
case SeparateFields: |
|
case MixedFields: |
|
/* Turn field height into frame height. */ |
|
st->codec->height *= 2; |
|
default: |
|
av_log(mxf->fc, AV_LOG_INFO, |
|
"Unknown frame layout type: %d\n", |
|
descriptor->frame_layout); |
|
} |
|
if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) { |
|
st->codec->pix_fmt = descriptor->pix_fmt; |
|
if (st->codec->pix_fmt == AV_PIX_FMT_NONE) { |
|
pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls, |
|
&descriptor->essence_codec_ul); |
|
st->codec->pix_fmt = pix_fmt_ul->id; |
|
if (st->codec->pix_fmt == AV_PIX_FMT_NONE) { |
|
/* support files created before RP224v10 by defaulting to UYVY422 |
|
if subsampling is 4:2:2 and component depth is 8-bit */ |
|
if (descriptor->horiz_subsampling == 2 && |
|
descriptor->vert_subsampling == 1 && |
|
descriptor->component_depth == 8) { |
|
st->codec->pix_fmt = AV_PIX_FMT_UYVY422; |
|
} |
|
} |
|
} |
|
} |
|
st->need_parsing = AVSTREAM_PARSE_HEADERS; |
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul); |
|
if (st->codec->codec_id == AV_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; |
|
|
|
if (descriptor->sample_rate.den > 0) |
|
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; |
|
|
|
/* TODO: implement AV_CODEC_ID_RAWAUDIO */ |
|
if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) { |
|
if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) |
|
st->codec->codec_id = AV_CODEC_ID_PCM_S24LE; |
|
else if (descriptor->bits_per_sample == 32) |
|
st->codec->codec_id = AV_CODEC_ID_PCM_S32LE; |
|
} else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) { |
|
if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) |
|
st->codec->codec_id = AV_CODEC_ID_PCM_S24BE; |
|
else if (descriptor->bits_per_sample == 32) |
|
st->codec->codec_id = AV_CODEC_ID_PCM_S32BE; |
|
} else if (st->codec->codec_id == AV_CODEC_ID_MP2) { |
|
st->need_parsing = AVSTREAM_PARSE_FULL; |
|
} |
|
} |
|
if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { |
|
/* TODO: decode timestamps */ |
|
st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; |
|
} |
|
} |
|
|
|
ret = 0; |
|
fail_and_free: |
|
return ret; |
|
} |
|
|
|
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 AVERROR(ENOMEM); |
|
while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) { |
|
int ret; |
|
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 ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) |
|
return ret; |
|
|
|
/* Accept the 64k local set limit being exceeded (Avid). Don't accept |
|
* it extending past the end of the KLV though (zzuf5.mxf). */ |
|
if (avio_tell(pb) > klv_end) { |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"local tag %#04x extends past end of local set @ %#"PRIx64"\n", |
|
tag, klv->offset); |
|
return AVERROR_INVALIDDATA; |
|
} else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */ |
|
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->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; |
|
} |
|
|
|
/** |
|
* Figure 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 = %"PRIX64"\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 inline void compute_partition_essence_offset(AVFormatContext *s, |
|
MXFContext *mxf, |
|
KLVPacket *klv) |
|
{ |
|
MXFPartition *cur_part = mxf->current_partition; |
|
/* 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(cur_part->this_partition + cur_part->pack_length, |
|
cur_part->kag_size) + |
|
round_to_kag(cur_part->header_byte_count, cur_part->kag_size) + |
|
round_to_kag(cur_part->index_byte_count, cur_part->kag_size); |
|
|
|
if (mxf->op == OPAtom) { |
|
/* point essence_offset to the actual data |
|
* OPAtom has all the essence in one big KLV |
|
*/ |
|
cur_part->essence_offset = avio_tell(s->pb); |
|
cur_part->essence_length = klv->length; |
|
} else { |
|
/* NOTE: op1a_essence_offset may be less than to klv.offset |
|
* (C0023S01.mxf) */ |
|
cur_part->essence_offset = op1a_essence_offset; |
|
} |
|
} |
|
|
|
static int is_pcm(enum AVCodecID codec_id) |
|
{ |
|
/* we only care about "normal" PCM codecs until we get samples */ |
|
return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD; |
|
} |
|
|
|
/** |
|
* Deal with the case where for some audio atoms EditUnitByteCount is |
|
* very small (2, 4..). In those cases we should read more than one |
|
* sample per call to mxf_read_packet(). |
|
*/ |
|
static void mxf_handle_small_eubc(AVFormatContext *s) |
|
{ |
|
MXFContext *mxf = s->priv_data; |
|
|
|
/* assuming non-OPAtom == frame wrapped |
|
* no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */ |
|
if (mxf->op != OPAtom) |
|
return; |
|
|
|
/* expect PCM with exactly one index table segment and a small (< 32) EUBC */ |
|
if (s->nb_streams != 1 || |
|
s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || |
|
!is_pcm(s->streams[0]->codec->codec_id) || |
|
mxf->nb_index_tables != 1 || |
|
mxf->index_tables[0].nb_segments != 1 || |
|
mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32) |
|
return; |
|
|
|
/* arbitrarily default to 48 kHz PAL audio frame size */ |
|
/* TODO: We could compute this from the ratio between the audio |
|
* and video edit rates for 48 kHz NTSC we could use the |
|
* 1802-1802-1802-1802-1801 pattern. */ |
|
mxf->edit_units_per_packet = 1920; |
|
} |
|
|
|
static int mxf_read_header(AVFormatContext *s) |
|
{ |
|
MXFContext *mxf = s->priv_data; |
|
KLVPacket klv; |
|
int64_t essence_offset = 0; |
|
int ret; |
|
|
|
mxf->last_forward_tell = INT64_MAX; |
|
mxf->edit_units_per_packet = 1; |
|
|
|
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 AVERROR_INVALIDDATA; |
|
} |
|
avio_seek(s->pb, -14, SEEK_CUR); |
|
mxf->fc = s; |
|
mxf->run_in = avio_tell(s->pb); |
|
|
|
while (!s->pb->eof_reached) { |
|
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_avid_essence_element_key) || |
|
IS_KLV_KEY(klv.key, mxf_system_item_key)) { |
|
|
|
if (!mxf->current_partition) { |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"found essence prior to first PartitionPack\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (!mxf->current_partition->essence_offset) { |
|
compute_partition_essence_offset(s, mxf, &klv); |
|
} |
|
|
|
if (!essence_offset) |
|
essence_offset = klv.offset; |
|
|
|
/* 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; |
|
else if (mxf->parsing_backward) |
|
continue; |
|
/* we're still parsing forward. proceed to parsing this partition pack */ |
|
} |
|
|
|
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); |
|
|
|
/* only seek forward, else this can loop for a long time */ |
|
if (avio_tell(s->pb) > next) { |
|
av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n", |
|
klv.offset); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
avio_seek(s->pb, next, SEEK_SET); |
|
} |
|
if (res < 0) { |
|
av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); |
|
return res; |
|
} |
|
break; |
|
} |
|
} |
|
if (!metadata->read) |
|
avio_skip(s->pb, klv.length); |
|
} |
|
/* FIXME avoid seek */ |
|
if (!essence_offset) { |
|
av_log(s, AV_LOG_ERROR, "no essence\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
avio_seek(s->pb, essence_offset, SEEK_SET); |
|
|
|
mxf_compute_essence_containers(mxf); |
|
|
|
/* we need to do this before computing the index tables |
|
* to be able to fill in zero IndexDurations with st->duration */ |
|
if ((ret = mxf_parse_structural_metadata(mxf)) < 0) |
|
return ret; |
|
|
|
if ((ret = mxf_compute_index_tables(mxf)) < 0) |
|
return ret; |
|
|
|
if (mxf->nb_index_tables > 1) { |
|
/* TODO: look up which IndexSID to use via EssenceContainerData */ |
|
av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n", |
|
mxf->nb_index_tables, mxf->index_tables[0].index_sid); |
|
} else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) { |
|
av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
mxf_handle_small_eubc(s); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Sets mxf->current_edit_unit based on what offset we're currently at. |
|
* @return next_ofs if OK, <0 on error |
|
*/ |
|
static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset) |
|
{ |
|
int64_t last_ofs = -1, next_ofs = -1; |
|
MXFIndexTable *t = &mxf->index_tables[0]; |
|
|
|
/* this is called from the OP1a demuxing logic, which means there |
|
* may be no index tables */ |
|
if (mxf->nb_index_tables <= 0) |
|
return -1; |
|
|
|
/* find mxf->current_edit_unit so that the next edit unit starts ahead |
|
* of current_offset */ |
|
while (mxf->current_edit_unit >= 0) { |
|
if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, |
|
NULL, &next_ofs, 0) < 0) |
|
return -1; |
|
|
|
if (next_ofs <= last_ofs) { |
|
/* large next_ofs didn't change or current_edit_unit wrapped |
|
* around this fixes the infinite loop on zzuf3.mxf */ |
|
av_log(mxf->fc, AV_LOG_ERROR, |
|
"next_ofs didn't change. not deriving packet timestamps\n"); |
|
return -1; |
|
} |
|
|
|
if (next_ofs > current_offset) |
|
break; |
|
|
|
last_ofs = next_ofs; |
|
mxf->current_edit_unit++; |
|
} |
|
|
|
/* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files |
|
* may lack IndexEntryArrays */ |
|
if (mxf->current_edit_unit < 0) |
|
return -1; |
|
|
|
return next_ofs; |
|
} |
|
|
|
static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
KLVPacket klv; |
|
MXFContext *mxf = s->priv_data; |
|
|
|
while (!s->pb->eof_reached) { |
|
if (klv_read_packet(&klv, s->pb) < 0) |
|
return -1; |
|
PRINT_KEY(s, "read packet", klv.key); |
|
av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset); |
|
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { |
|
int res = mxf_decrypt_triplet(s, pkt, &klv); |
|
if (res < 0) { |
|
av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); |
|
return -1; |
|
} |
|
return 0; |
|
} |
|
if (IS_KLV_KEY(klv.key, mxf_essence_element_key) || |
|
IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) { |
|
int index = mxf_get_stream_index(s, &klv); |
|
int64_t next_ofs, next_klv; |
|
AVStream *st; |
|
MXFTrack *track; |
|
|
|
if (index < 0) { |
|
av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); |
|
goto skip; |
|
} |
|
|
|
st = s->streams[index]; |
|
track = st->priv_data; |
|
|
|
if (s->streams[index]->discard == AVDISCARD_ALL) |
|
goto skip; |
|
|
|
next_klv = avio_tell(s->pb) + klv.length; |
|
next_ofs = mxf_set_current_edit_unit(mxf, klv.offset); |
|
|
|
if (next_ofs >= 0 && next_klv > next_ofs) { |
|
/* if this check is hit then it's possible OPAtom was treated |
|
* as OP1a truncate the packet since it's probably very large |
|
* (>2 GiB is common) */ |
|
av_log_ask_for_sample(s, |
|
"KLV for edit unit %i extends into next " |
|
"edit unit - OPAtom misinterpreted as " |
|
"OP1a?\n", |
|
mxf->current_edit_unit); |
|
klv.length = next_ofs - avio_tell(s->pb); |
|
} |
|
|
|
/* check for 8 channels AES3 element */ |
|
if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { |
|
if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) { |
|
av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); |
|
return -1; |
|
} |
|
} else { |
|
int ret = av_get_packet(s->pb, pkt, klv.length); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
pkt->stream_index = index; |
|
pkt->pos = klv.offset; |
|
|
|
if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) { |
|
/* mxf->current_edit_unit good - see if we have an |
|
* index table to derive timestamps from */ |
|
MXFIndexTable *t = &mxf->index_tables[0]; |
|
|
|
if (mxf->nb_index_tables >= 1 && |
|
mxf->current_edit_unit < t->nb_ptses) { |
|
pkt->dts = mxf->current_edit_unit + t->first_dts; |
|
pkt->pts = t->ptses[mxf->current_edit_unit]; |
|
} else if (track->intra_only) { |
|
/* intra-only -> PTS = EditUnit. |
|
* let utils.c figure out DTS since it can be |
|
* < PTS if low_delay = 0 (Sony IMX30) */ |
|
pkt->pts = mxf->current_edit_unit; |
|
} |
|
} |
|
|
|
/* seek for truncated packets */ |
|
avio_seek(s->pb, next_klv, SEEK_SET); |
|
|
|
return 0; |
|
} else |
|
skip: |
|
avio_skip(s->pb, klv.length); |
|
} |
|
return AVERROR_EOF; |
|
} |
|
|
|
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
MXFContext *mxf = s->priv_data; |
|
int ret, size; |
|
int64_t ret64, pos, next_pos; |
|
AVStream *st; |
|
MXFIndexTable *t; |
|
int edit_units; |
|
|
|
if (mxf->op != OPAtom) |
|
return mxf_read_packet_old(s, pkt); |
|
|
|
/* OPAtom - clip wrapped demuxing */ |
|
/* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */ |
|
st = s->streams[0]; |
|
t = &mxf->index_tables[0]; |
|
|
|
if (mxf->current_edit_unit >= st->duration) |
|
return AVERROR_EOF; |
|
|
|
edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit); |
|
|
|
if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0) |
|
return ret; |
|
|
|
/* compute size by finding the next edit unit or the end of the essence container |
|
* not pretty, but it works */ |
|
if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 && |
|
(next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) { |
|
av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if ((size = next_pos - pos) <= 0) { |
|
av_log(s, AV_LOG_ERROR, "bad size: %i\n", size); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0) |
|
return ret64; |
|
|
|
if ((ret = av_get_packet(s->pb, pkt, size)) != size) |
|
return ret < 0 ? ret : AVERROR_EOF; |
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses && |
|
mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) { |
|
pkt->dts = mxf->current_edit_unit + t->first_dts; |
|
pkt->pts = t->ptses[mxf->current_edit_unit]; |
|
} |
|
|
|
pkt->stream_index = 0; |
|
mxf->current_edit_unit += edit_units; |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int mxf_read_close(AVFormatContext *s) |
|
{ |
|
MXFContext *mxf = s->priv_data; |
|
MXFIndexTableSegment *seg; |
|
int i; |
|
|
|
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]; |
|
av_freep(&seg->temporal_offset_entries); |
|
av_freep(&seg->flag_entries); |
|
av_freep(&seg->stream_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); |
|
|
|
for (i = 0; i < mxf->nb_index_tables; i++) { |
|
av_freep(&mxf->index_tables[i].segments); |
|
av_freep(&mxf->index_tables[i].ptses); |
|
av_freep(&mxf->index_tables[i].fake_index); |
|
} |
|
av_freep(&mxf->index_tables); |
|
|
|
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; |
|
MXFContext* mxf = s->priv_data; |
|
int64_t seekpos; |
|
int ret; |
|
MXFIndexTable *t; |
|
|
|
if (mxf->nb_index_tables <= 0) { |
|
if (!s->bit_rate) |
|
return AVERROR_INVALIDDATA; |
|
if (sample_time < 0) |
|
sample_time = 0; |
|
seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); |
|
|
|
if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0) |
|
return ret; |
|
ff_update_cur_dts(s, st, sample_time); |
|
} else { |
|
t = &mxf->index_tables[0]; |
|
|
|
/* clamp above zero, else ff_index_search_timestamp() returns negative |
|
* this also means we allow seeking before the start */ |
|
sample_time = FFMAX(sample_time, 0); |
|
|
|
if (t->fake_index) { |
|
/* behave as if we have a proper index */ |
|
if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0) |
|
return sample_time; |
|
} else { |
|
/* no IndexEntryArray (one or more CBR segments) |
|
* make sure we don't seek past the end */ |
|
sample_time = FFMIN(sample_time, st->duration - 1); |
|
} |
|
|
|
if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0) |
|
return ret; |
|
|
|
ff_update_cur_dts(s, st, sample_time); |
|
mxf->current_edit_unit = sample_time; |
|
avio_seek(s->pb, seekpos, SEEK_SET); |
|
} |
|
return 0; |
|
} |
|
|
|
AVInputFormat ff_mxf_demuxer = { |
|
.name = "mxf", |
|
.long_name = NULL_IF_CONFIG_SMALL("MXF (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, |
|
};
|
|
|