988 lines
36 KiB
C
988 lines
36 KiB
C
/*
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* MXF demuxer.
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* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* References
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* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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* SMPTE 377M MXF File Format Specifications
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* SMPTE 378M Operational Pattern 1a
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* SMPTE 379M MXF Generic Container
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* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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* SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
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* SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
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*
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* Principle
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* Search for Track numbers which will identify essence element KLV packets.
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* Search for SourcePackage which define tracks which contains Track numbers.
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* Material Package contains tracks with reference to SourcePackage tracks.
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* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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* Assign Descriptors to correct Tracks.
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*
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* Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
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* Metadata parsing resolves Strong References to objects.
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*
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* Simple demuxer, only OP1A supported and some files might not work at all.
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* Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
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*/
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//#define DEBUG
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#include "libavutil/aes.h"
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#include "mxf.h"
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID source_container_ul;
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} MXFCryptoContext;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID source_package_uid;
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UID data_definition_ul;
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int64_t duration;
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int64_t start_position;
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int source_track_id;
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} MXFStructuralComponent;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID data_definition_ul;
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UID *structural_components_refs;
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int structural_components_count;
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int64_t duration;
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} MXFSequence;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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MXFSequence *sequence; /* mandatory, and only one */
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UID sequence_ref;
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int track_id;
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uint8_t track_number[4];
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AVRational edit_rate;
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} MXFTrack;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID essence_container_ul;
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UID essence_codec_ul;
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AVRational sample_rate;
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AVRational aspect_ratio;
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int width;
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int height;
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int channels;
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int bits_per_sample;
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UID *sub_descriptors_refs;
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int sub_descriptors_count;
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int linked_track_id;
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uint8_t *extradata;
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int extradata_size;
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} MXFDescriptor;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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UID package_uid;
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UID *tracks_refs;
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int tracks_count;
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MXFDescriptor *descriptor; /* only one */
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UID descriptor_ref;
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} MXFPackage;
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typedef struct {
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UID uid;
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enum MXFMetadataSetType type;
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} MXFMetadataSet;
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typedef struct {
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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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} MXFContext;
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enum MXFWrappingScheme {
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Frame,
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Clip,
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};
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typedef struct {
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const UID key;
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int (*read)();
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int ctx_size;
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enum MXFMetadataSetType type;
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} MXFMetadataReadTableEntry;
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/* partial keys to match */
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static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
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static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
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static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
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/* complete keys to match */
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static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
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static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
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static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
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static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
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#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
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static int64_t klv_decode_ber_length(ByteIOContext *pb)
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{
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uint64_t size = get_byte(pb);
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if (size & 0x80) { /* long form */
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int bytes_num = size & 0x7f;
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/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
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if (bytes_num > 8)
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return -1;
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size = 0;
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while (bytes_num--)
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size = size << 8 | get_byte(pb);
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}
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return size;
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}
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static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
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{
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int i, b;
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for (i = 0; i < size && !url_feof(pb); i++) {
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b = get_byte(pb);
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if (b == key[0])
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i = 0;
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else if (b != key[i])
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i = -1;
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}
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return i == size;
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}
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static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
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{
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if (!mxf_read_sync(pb, mxf_klv_key, 4))
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return -1;
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klv->offset = url_ftell(pb) - 4;
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memcpy(klv->key, mxf_klv_key, 4);
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get_buffer(pb, klv->key + 4, 12);
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klv->length = klv_decode_ber_length(pb);
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return klv->length == -1 ? -1 : 0;
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}
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static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
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{
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int i;
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for (i = 0; i < s->nb_streams; i++) {
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MXFTrack *track = s->streams[i]->priv_data;
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/* SMPTE 379M 7.3 */
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if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
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return i;
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}
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/* return 0 if only one stream, for OP Atom files with 0 as track number */
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return s->nb_streams == 1 ? 0 : -1;
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}
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/* XXX: use AVBitStreamFilter */
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static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
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{
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uint8_t buffer[61444];
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const uint8_t *buf_ptr, *end_ptr;
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uint8_t *data_ptr;
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int i;
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if (length > 61444) /* worst case PAL 1920 samples 8 channels */
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return -1;
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get_buffer(pb, buffer, length);
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av_new_packet(pkt, length);
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data_ptr = pkt->data;
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end_ptr = buffer + length;
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buf_ptr = buffer + 4; /* skip SMPTE 331M header */
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for (; buf_ptr < 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_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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pkt->size = data_ptr - pkt->data;
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return 0;
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}
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static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
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{
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static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
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MXFContext *mxf = s->priv_data;
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ByteIOContext *pb = s->pb;
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offset_t end = url_ftell(pb) + klv->length;
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uint64_t size;
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uint64_t orig_size;
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uint64_t plaintext_size;
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uint8_t ivec[16];
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uint8_t tmpbuf[16];
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int index;
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if (!mxf->aesc && s->key && s->keylen == 16) {
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mxf->aesc = av_malloc(av_aes_size);
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if (!mxf->aesc)
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return -1;
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av_aes_init(mxf->aesc, s->key, 128, 1);
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}
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// crypto context
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url_fskip(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 = get_be64(pb);
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// source klv key
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klv_decode_ber_length(pb);
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get_buffer(pb, klv->key, 16);
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if (!IS_KLV_KEY(klv, mxf_essence_element_key))
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return -1;
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index = mxf_get_stream_index(s, klv);
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if (index < 0)
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return -1;
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// source size
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klv_decode_ber_length(pb);
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orig_size = get_be64(pb);
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if (orig_size < plaintext_size)
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return -1;
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// enc. code
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size = klv_decode_ber_length(pb);
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if (size < 32 || size - 32 < orig_size)
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return -1;
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get_buffer(pb, ivec, 16);
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get_buffer(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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av_get_packet(pb, pkt, size);
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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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pkt->size = orig_size;
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pkt->stream_index = index;
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url_fskip(pb, end - url_ftell(pb));
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return 0;
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}
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static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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KLVPacket klv;
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while (!url_feof(s->pb)) {
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if (klv_read_packet(&klv, s->pb) < 0)
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return -1;
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PRINT_KEY(s, "read packet", klv.key);
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if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
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int res = mxf_decrypt_triplet(s, pkt, &klv);
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if (res < 0) {
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av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
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return -1;
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}
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return 0;
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}
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if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
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int index = mxf_get_stream_index(s, &klv);
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if (index < 0) {
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av_log(s, AV_LOG_ERROR, "error getting stream index %x\n", AV_RB32(klv.key+12));
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goto skip;
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}
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if (s->streams[index]->discard == AVDISCARD_ALL)
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goto skip;
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/* check for 8 channels AES3 element */
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if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
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if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
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av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
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return -1;
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}
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} else
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av_get_packet(s->pb, pkt, klv.length);
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pkt->stream_index = index;
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pkt->pos = klv.offset;
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return 0;
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} else
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skip:
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url_fskip(s->pb, klv.length);
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}
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return AVERROR(EIO);
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}
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static int mxf_read_primer_pack(MXFContext *mxf)
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{
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ByteIOContext *pb = mxf->fc->pb;
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int item_num = get_be32(pb);
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int item_len = get_be32(pb);
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if (item_len != 18) {
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av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
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return -1;
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}
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if (item_num > UINT_MAX / item_len)
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return -1;
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mxf->local_tags_count = item_num;
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mxf->local_tags = av_malloc(item_num*item_len);
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if (!mxf->local_tags)
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return -1;
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get_buffer(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_add_metadata_set(MXFContext *mxf, void *metadata_set)
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{
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mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
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if (!mxf->metadata_sets)
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return -1;
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mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
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mxf->metadata_sets_count++;
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return 0;
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}
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static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
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{
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if (size != 16)
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return -1;
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if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
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get_buffer(pb, cryptocontext->source_container_ul, 16);
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return 0;
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}
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static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
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{
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switch (tag) {
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case 0x1901:
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mxf->packages_count = get_be32(pb);
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if (mxf->packages_count >= UINT_MAX / sizeof(UID))
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return -1;
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mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
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if (!mxf->packages_refs)
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return -1;
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url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
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get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
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break;
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}
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return 0;
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}
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static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
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{
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switch(tag) {
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case 0x0202:
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source_clip->duration = get_be64(pb);
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break;
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case 0x1201:
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source_clip->start_position = get_be64(pb);
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break;
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case 0x1101:
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/* UMID, only get last 16 bytes */
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url_fskip(pb, 16);
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get_buffer(pb, source_clip->source_package_uid, 16);
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break;
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case 0x1102:
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source_clip->source_track_id = get_be32(pb);
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break;
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}
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return 0;
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}
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static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
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{
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switch(tag) {
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case 0x4403:
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package->tracks_count = get_be32(pb);
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if (package->tracks_count >= UINT_MAX / sizeof(UID))
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return -1;
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package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
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if (!package->tracks_refs)
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return -1;
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url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
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get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
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break;
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}
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return 0;
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}
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static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
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{
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switch(tag) {
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case 0x4801:
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track->track_id = get_be32(pb);
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break;
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case 0x4804:
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get_buffer(pb, track->track_number, 4);
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break;
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case 0x4B01:
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track->edit_rate.den = get_be32(pb);
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track->edit_rate.num = get_be32(pb);
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break;
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case 0x4803:
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get_buffer(pb, track->sequence_ref, 16);
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break;
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}
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return 0;
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}
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static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
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{
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switch(tag) {
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case 0x0202:
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sequence->duration = get_be64(pb);
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break;
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case 0x0201:
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get_buffer(pb, sequence->data_definition_ul, 16);
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break;
|
|
case 0x1001:
|
|
sequence->structural_components_count = get_be32(pb);
|
|
if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
|
|
if (!sequence->structural_components_refs)
|
|
return -1;
|
|
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
|
|
{
|
|
switch(tag) {
|
|
case 0x4403:
|
|
package->tracks_count = get_be32(pb);
|
|
if (package->tracks_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
|
|
if (!package->tracks_refs)
|
|
return -1;
|
|
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
|
|
break;
|
|
case 0x4401:
|
|
/* UMID, only get last 16 bytes */
|
|
url_fskip(pb, 16);
|
|
get_buffer(pb, package->package_uid, 16);
|
|
break;
|
|
case 0x4701:
|
|
get_buffer(pb, package->descriptor_ref, 16);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
|
|
{
|
|
int code;
|
|
|
|
do {
|
|
code = get_byte(pb);
|
|
dprintf(NULL, "pixel layout: code 0x%x\n", code);
|
|
switch (code) {
|
|
case 0x52: /* R */
|
|
descriptor->bits_per_sample += get_byte(pb);
|
|
break;
|
|
case 0x47: /* G */
|
|
descriptor->bits_per_sample += get_byte(pb);
|
|
break;
|
|
case 0x42: /* B */
|
|
descriptor->bits_per_sample += get_byte(pb);
|
|
break;
|
|
default:
|
|
get_byte(pb);
|
|
}
|
|
} while (code != 0); /* SMPTE 377M E.2.46 */
|
|
}
|
|
|
|
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
|
|
{
|
|
switch(tag) {
|
|
case 0x3F01:
|
|
descriptor->sub_descriptors_count = get_be32(pb);
|
|
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
|
|
return -1;
|
|
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
|
|
if (!descriptor->sub_descriptors_refs)
|
|
return -1;
|
|
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
|
|
get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
|
|
break;
|
|
case 0x3004:
|
|
get_buffer(pb, descriptor->essence_container_ul, 16);
|
|
break;
|
|
case 0x3006:
|
|
descriptor->linked_track_id = get_be32(pb);
|
|
break;
|
|
case 0x3201: /* PictureEssenceCoding */
|
|
get_buffer(pb, descriptor->essence_codec_ul, 16);
|
|
break;
|
|
case 0x3203:
|
|
descriptor->width = get_be32(pb);
|
|
break;
|
|
case 0x3202:
|
|
descriptor->height = get_be32(pb);
|
|
break;
|
|
case 0x320E:
|
|
descriptor->aspect_ratio.num = get_be32(pb);
|
|
descriptor->aspect_ratio.den = get_be32(pb);
|
|
break;
|
|
case 0x3D03:
|
|
descriptor->sample_rate.num = get_be32(pb);
|
|
descriptor->sample_rate.den = get_be32(pb);
|
|
break;
|
|
case 0x3D06: /* SoundEssenceCompression */
|
|
get_buffer(pb, descriptor->essence_codec_ul, 16);
|
|
break;
|
|
case 0x3D07:
|
|
descriptor->channels = get_be32(pb);
|
|
break;
|
|
case 0x3D01:
|
|
descriptor->bits_per_sample = get_be32(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);
|
|
if (!descriptor->extradata)
|
|
return -1;
|
|
descriptor->extradata_size = size;
|
|
get_buffer(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->id != CODEC_ID_NONE) {
|
|
if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
|
|
break;
|
|
uls++;
|
|
}
|
|
return uls;
|
|
}
|
|
|
|
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
|
|
{
|
|
while (uls->type != CODEC_TYPE_DATA) {
|
|
if(mxf_match_uid(uls->uid, *uid, 16))
|
|
break;
|
|
uls++;
|
|
}
|
|
return uls->type;
|
|
}
|
|
|
|
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 int mxf_parse_structural_metadata(MXFContext *mxf)
|
|
{
|
|
MXFPackage *material_package = NULL;
|
|
MXFPackage *temp_package = NULL;
|
|
int i, j, k;
|
|
|
|
dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
|
|
/* TODO: handle multiple material packages (OP3x) */
|
|
for (i = 0; i < mxf->packages_count; i++) {
|
|
material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
|
|
if (material_package) break;
|
|
}
|
|
if (!material_package) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < material_package->tracks_count; i++) {
|
|
MXFPackage *source_package = NULL;
|
|
MXFTrack *material_track = NULL;
|
|
MXFTrack *source_track = NULL;
|
|
MXFTrack *temp_track = NULL;
|
|
MXFDescriptor *descriptor = NULL;
|
|
MXFStructuralComponent *component = NULL;
|
|
UID *essence_container_ul = NULL;
|
|
const MXFCodecUL *codec_ul = NULL;
|
|
const MXFCodecUL *container_ul = NULL;
|
|
AVStream *st;
|
|
|
|
if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
|
|
continue;
|
|
}
|
|
|
|
if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
|
|
return -1;
|
|
}
|
|
|
|
/* 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_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
|
|
break;
|
|
}
|
|
for (k = 0; k < source_package->tracks_count; k++) {
|
|
if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
|
|
return -1;
|
|
}
|
|
if (temp_track->track_id == component->source_track_id) {
|
|
source_track = temp_track;
|
|
break;
|
|
}
|
|
}
|
|
if (!source_track) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
|
|
break;
|
|
}
|
|
}
|
|
if (!source_track)
|
|
continue;
|
|
|
|
st = av_new_stream(mxf->fc, source_track->track_id);
|
|
if (!st) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
|
|
return -1;
|
|
}
|
|
st->priv_data = source_track;
|
|
st->duration = component->duration;
|
|
if (st->duration == -1)
|
|
st->duration = AV_NOPTS_VALUE;
|
|
st->start_time = component->start_position;
|
|
av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
|
|
|
|
if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
|
|
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
|
|
return -1;
|
|
}
|
|
|
|
PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
|
|
st->codec->codec_type = mxf_get_codec_type(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
|
|
|
|
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 == CODEC_TYPE_VIDEO) {
|
|
container_ul = mxf_get_codec_ul(ff_mxf_essence_container_uls, essence_container_ul);
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
st->codec->codec_id = container_ul->id;
|
|
st->codec->width = descriptor->width;
|
|
st->codec->height = descriptor->height;
|
|
st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
|
|
st->sample_aspect_ratio = descriptor->aspect_ratio;
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
|
|
container_ul = mxf_get_codec_ul(ff_mxf_essence_container_uls, essence_container_ul);
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
st->codec->codec_id = container_ul->id;
|
|
st->codec->channels = descriptor->channels;
|
|
st->codec->bits_per_sample = descriptor->bits_per_sample;
|
|
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
|
|
/* TODO: implement CODEC_ID_RAWAUDIO */
|
|
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
|
|
if (descriptor->bits_per_sample == 24)
|
|
st->codec->codec_id = CODEC_ID_PCM_S24LE;
|
|
else if (descriptor->bits_per_sample == 32)
|
|
st->codec->codec_id = CODEC_ID_PCM_S32LE;
|
|
} else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
|
|
if (descriptor->bits_per_sample == 24)
|
|
st->codec->codec_id = CODEC_ID_PCM_S24BE;
|
|
else if (descriptor->bits_per_sample == 32)
|
|
st->codec->codec_id = CODEC_ID_PCM_S32BE;
|
|
} else if (st->codec->codec_id == CODEC_ID_MP2) {
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
}
|
|
}
|
|
if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
|
|
av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
|
|
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,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 },
|
|
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
|
|
};
|
|
|
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static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
|
|
{
|
|
ByteIOContext *pb = mxf->fc->pb;
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MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
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uint64_t klv_end = url_ftell(pb) + klv->length;
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|
|
|
if (!ctx)
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return -1;
|
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while (url_ftell(pb) + 4 < klv_end) {
|
|
int tag = get_be16(pb);
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|
int size = get_be16(pb); /* KLV specified by 0x53 */
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|
uint64_t next = url_ftell(pb) + size;
|
|
UID uid = {0};
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|
|
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if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
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av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
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continue;
|
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}
|
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if (tag > 0x7FFF) { /* dynamic tag */
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|
int i;
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|
for (i = 0; i < mxf->local_tags_count; i++) {
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int local_tag = AV_RB16(mxf->local_tags+i*18);
|
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if (local_tag == tag) {
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memcpy(uid, mxf->local_tags+i*18+2, 16);
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dprintf(mxf->fc, "local tag 0x%04X\n", local_tag);
|
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PRINT_KEY(mxf->fc, "uid", uid);
|
|
}
|
|
}
|
|
}
|
|
if (ctx_size && tag == 0x3C0A)
|
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get_buffer(pb, ctx->uid, 16);
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|
else if (read_child(ctx, pb, tag, size, uid) < 0)
|
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return -1;
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|
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url_fseek(pb, next, SEEK_SET);
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}
|
|
if (ctx_size) ctx->type = type;
|
|
return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
|
|
}
|
|
|
|
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
MXFContext *mxf = s->priv_data;
|
|
KLVPacket klv;
|
|
|
|
if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
|
|
av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
|
|
return -1;
|
|
}
|
|
url_fseek(s->pb, -14, SEEK_CUR);
|
|
mxf->fc = s;
|
|
while (!url_feof(s->pb)) {
|
|
const MXFMetadataReadTableEntry *metadata;
|
|
|
|
if (klv_read_packet(&klv, s->pb) < 0)
|
|
return -1;
|
|
PRINT_KEY(s, "read header", klv.key);
|
|
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
|
|
IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
|
|
/* FIXME avoid seek */
|
|
url_fseek(s->pb, klv.offset, SEEK_SET);
|
|
break;
|
|
}
|
|
|
|
for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
|
|
if (IS_KLV_KEY(klv.key, metadata->key)) {
|
|
int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
|
|
if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
|
|
av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!metadata->read)
|
|
url_fskip(s->pb, klv.length);
|
|
}
|
|
return mxf_parse_structural_metadata(mxf);
|
|
}
|
|
|
|
static int mxf_read_close(AVFormatContext *s)
|
|
{
|
|
MXFContext *mxf = s->priv_data;
|
|
int i;
|
|
|
|
av_freep(&mxf->packages_refs);
|
|
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 Track:
|
|
mxf->metadata_sets[i] = NULL; /* will be freed later */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
av_freep(&mxf->metadata_sets[i]);
|
|
}
|
|
av_freep(&mxf->metadata_sets);
|
|
av_freep(&mxf->aesc);
|
|
av_freep(&mxf->local_tags);
|
|
return 0;
|
|
}
|
|
|
|
static int mxf_probe(AVProbeData *p) {
|
|
uint8_t *bufp = p->buf;
|
|
uint8_t *end = p->buf + p->buf_size;
|
|
|
|
if (p->buf_size < sizeof(mxf_header_partition_pack_key))
|
|
return 0;
|
|
|
|
/* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
|
|
end -= sizeof(mxf_header_partition_pack_key);
|
|
for (; bufp < end; bufp++) {
|
|
if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* rudimentary byte seek */
|
|
/* XXX: use MXF Index */
|
|
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
int64_t seconds;
|
|
|
|
if (!s->bit_rate)
|
|
return -1;
|
|
if (sample_time < 0)
|
|
sample_time = 0;
|
|
seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
|
|
url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
|
|
av_update_cur_dts(s, st, sample_time);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat mxf_demuxer = {
|
|
"mxf",
|
|
NULL_IF_CONFIG_SMALL("Material eXchange Format"),
|
|
sizeof(MXFContext),
|
|
mxf_probe,
|
|
mxf_read_header,
|
|
mxf_read_packet,
|
|
mxf_read_close,
|
|
mxf_read_seek,
|
|
};
|