/* * MXF demuxer. * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* * References * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value * SMPTE 377M MXF File Format Specifications * SMPTE 378M Operational Pattern 1a * SMPTE 379M MXF Generic Container * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container * * Principle * Search for Track numbers which will identify essence element KLV packets. * Search for SourcePackage which define tracks which contains Track numbers. * Material Package contains tracks with reference to SourcePackage tracks. * Search for Descriptors (Picture, Sound) which contains codec info and parameters. * Assign Descriptors to correct Tracks. * * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext. * Metadata parsing resolves Strong References to objects. * * Simple demuxer, only OP1A supported and some files might not work at all. * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1 */ //#define DEBUG #include "libavutil/aes.h" #include "libavcodec/bytestream.h" #include "avformat.h" #include "mxf.h" typedef struct { UID uid; enum MXFMetadataSetType type; UID source_container_ul; } MXFCryptoContext; typedef struct { UID uid; enum MXFMetadataSetType type; UID source_package_uid; UID data_definition_ul; int64_t duration; int64_t start_position; int source_track_id; } MXFStructuralComponent; typedef struct { UID uid; enum MXFMetadataSetType type; UID data_definition_ul; UID *structural_components_refs; int structural_components_count; int64_t duration; } MXFSequence; typedef struct { UID uid; enum MXFMetadataSetType type; MXFSequence *sequence; /* mandatory, and only one */ UID sequence_ref; int track_id; uint8_t track_number[4]; AVRational edit_rate; } MXFTrack; typedef struct { UID uid; enum MXFMetadataSetType type; UID essence_container_ul; UID essence_codec_ul; AVRational sample_rate; AVRational aspect_ratio; int width; int height; int channels; int bits_per_sample; UID *sub_descriptors_refs; int sub_descriptors_count; int linked_track_id; uint8_t *extradata; int extradata_size; enum PixelFormat pix_fmt; } MXFDescriptor; typedef struct { UID uid; enum MXFMetadataSetType type; } MXFIndexTableSegment; typedef struct { UID uid; enum MXFMetadataSetType type; UID package_uid; UID *tracks_refs; int tracks_count; MXFDescriptor *descriptor; /* only one */ UID descriptor_ref; } MXFPackage; typedef struct { UID uid; enum MXFMetadataSetType type; } MXFMetadataSet; typedef struct { UID *packages_refs; int packages_count; MXFMetadataSet **metadata_sets; int metadata_sets_count; AVFormatContext *fc; struct AVAES *aesc; uint8_t *local_tags; int local_tags_count; } MXFContext; enum MXFWrappingScheme { Frame, Clip, }; typedef int MXFMetadataReadFunc(void *arg, ByteIOContext *pb, int tag, int size, UID uid); typedef struct { const UID key; MXFMetadataReadFunc *read; int ctx_size; enum MXFMetadataSetType type; } MXFMetadataReadTableEntry; /* partial keys to match */ static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 }; static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 }; static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 }; /* complete keys to match */ 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 }; static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 }; static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 }; static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 }; #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y))) static int64_t klv_decode_ber_length(ByteIOContext *pb) { uint64_t size = get_byte(pb); if (size & 0x80) { /* long form */ int bytes_num = size & 0x7f; /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */ if (bytes_num > 8) return -1; size = 0; while (bytes_num--) size = size << 8 | get_byte(pb); } return size; } static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size) { int i, b; for (i = 0; i < size && !url_feof(pb); i++) { b = get_byte(pb); if (b == key[0]) i = 0; else if (b != key[i]) i = -1; } return i == size; } static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb) { if (!mxf_read_sync(pb, mxf_klv_key, 4)) return -1; klv->offset = url_ftell(pb) - 4; memcpy(klv->key, mxf_klv_key, 4); get_buffer(pb, klv->key + 4, 12); klv->length = klv_decode_ber_length(pb); return klv->length == -1 ? -1 : 0; } static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv) { int i; for (i = 0; i < s->nb_streams; i++) { MXFTrack *track = s->streams[i]->priv_data; /* SMPTE 379M 7.3 */ if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number))) return i; } /* return 0 if only one stream, for OP Atom files with 0 as track number */ return s->nb_streams == 1 ? 0 : -1; } /* XXX: use AVBitStreamFilter */ static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length) { const uint8_t *buf_ptr, *end_ptr; uint8_t *data_ptr; int i; if (length > 61444) /* worst case PAL 1920 samples 8 channels */ return -1; av_new_packet(pkt, length); get_buffer(pb, pkt->data, length); data_ptr = pkt->data; end_ptr = pkt->data + length; buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */ for (; buf_ptr < end_ptr; ) { for (i = 0; i < st->codec->channels; i++) { uint32_t sample = bytestream_get_le32(&buf_ptr); if (st->codec->bits_per_coded_sample == 24) bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff); else bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff); } buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M } pkt->size = data_ptr - pkt->data; return 0; } static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv) { static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b}; MXFContext *mxf = s->priv_data; ByteIOContext *pb = s->pb; int64_t end = url_ftell(pb) + klv->length; uint64_t size; uint64_t orig_size; uint64_t plaintext_size; uint8_t ivec[16]; uint8_t tmpbuf[16]; int index; if (!mxf->aesc && s->key && s->keylen == 16) { mxf->aesc = av_malloc(av_aes_size); if (!mxf->aesc) return -1; av_aes_init(mxf->aesc, s->key, 128, 1); } // crypto context url_fskip(pb, klv_decode_ber_length(pb)); // plaintext offset klv_decode_ber_length(pb); plaintext_size = get_be64(pb); // source klv key klv_decode_ber_length(pb); get_buffer(pb, klv->key, 16); if (!IS_KLV_KEY(klv, mxf_essence_element_key)) return -1; index = mxf_get_stream_index(s, klv); if (index < 0) return -1; // source size klv_decode_ber_length(pb); orig_size = get_be64(pb); if (orig_size < plaintext_size) return -1; // enc. code size = klv_decode_ber_length(pb); if (size < 32 || size - 32 < orig_size) return -1; get_buffer(pb, ivec, 16); get_buffer(pb, tmpbuf, 16); if (mxf->aesc) av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1); if (memcmp(tmpbuf, checkv, 16)) av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n"); size -= 32; av_get_packet(pb, pkt, size); size -= plaintext_size; if (mxf->aesc) av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size], &pkt->data[plaintext_size], size >> 4, ivec, 1); pkt->size = orig_size; pkt->stream_index = index; url_fskip(pb, end - url_ftell(pb)); return 0; } static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) { KLVPacket klv; while (!url_feof(s->pb)) { if (klv_read_packet(&klv, s->pb) < 0) return -1; PRINT_KEY(s, "read packet", klv.key); dprintf(s, "size %lld offset %#llx\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)) { int index = mxf_get_stream_index(s, &klv); if (index < 0) { av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); goto skip; } if (s->streams[index]->discard == AVDISCARD_ALL) goto skip; /* 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 av_get_packet(s->pb, pkt, klv.length); pkt->stream_index = index; pkt->pos = klv.offset; return 0; } else skip: url_fskip(s->pb, klv.length); } return AVERROR_EOF; } static int mxf_read_primer_pack(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFContext *mxf = arg; int item_num = get_be32(pb); int item_len = get_be32(pb); if (item_len != 18) { av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n"); return -1; } if (item_num > UINT_MAX / item_len) return -1; mxf->local_tags_count = item_num; mxf->local_tags = av_malloc(item_num*item_len); if (!mxf->local_tags) return -1; get_buffer(pb, mxf->local_tags, item_num*item_len); return 0; } static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) { if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets)) return AVERROR(ENOMEM); mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); if (!mxf->metadata_sets) return -1; mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set; mxf->metadata_sets_count++; return 0; } static int mxf_read_cryptographic_context(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFCryptoContext *cryptocontext = arg; if (size != 16) return -1; if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul)) get_buffer(pb, cryptocontext->source_container_ul, 16); return 0; } static int mxf_read_content_storage(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFContext *mxf = arg; switch (tag) { case 0x1901: mxf->packages_count = get_be32(pb); if (mxf->packages_count >= UINT_MAX / sizeof(UID)) return -1; mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID)); if (!mxf->packages_refs) return -1; url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID)); break; } return 0; } static int mxf_read_source_clip(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFStructuralComponent *source_clip = arg; switch(tag) { case 0x0202: source_clip->duration = get_be64(pb); break; case 0x1201: source_clip->start_position = get_be64(pb); break; case 0x1101: /* UMID, only get last 16 bytes */ url_fskip(pb, 16); get_buffer(pb, source_clip->source_package_uid, 16); break; case 0x1102: source_clip->source_track_id = get_be32(pb); break; } return 0; } static int mxf_read_material_package(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFPackage *package = arg; 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; } return 0; } static int mxf_read_track(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFTrack *track = arg; switch(tag) { case 0x4801: track->track_id = get_be32(pb); break; case 0x4804: get_buffer(pb, track->track_number, 4); break; case 0x4B01: track->edit_rate.den = get_be32(pb); track->edit_rate.num = get_be32(pb); break; case 0x4803: get_buffer(pb, track->sequence_ref, 16); break; } return 0; } static int mxf_read_sequence(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFSequence *sequence = arg; switch(tag) { case 0x0202: sequence->duration = get_be64(pb); break; case 0x0201: get_buffer(pb, sequence->data_definition_ul, 16); 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(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { MXFPackage *package = arg; 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 int mxf_read_index_table_segment(void *arg, ByteIOContext *pb, int tag, int size, UID uid) { switch(tag) { case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break; case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break; case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break; case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break; case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break; case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break; } return 0; } static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor) { int code, value, ofs = 0; char layout[16] = {0}; do { code = get_byte(pb); value = get_byte(pb); dprintf(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, ByteIOContext *pb, int tag, int size, UID uid) { MXFDescriptor *descriptor = arg; 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->uid[0]) { if(mxf_match_uid(uls->uid, *uid, uls->matching_len)) break; uls++; } return uls; } static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type) { int i; if (!strong_ref) return NULL; for (i = 0; i < mxf->metadata_sets_count; i++) { if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) && (type == AnyType || mxf->metadata_sets[i]->type == type)) { return mxf->metadata_sets[i]; } } return NULL; } static const MXFCodecUL mxf_essence_container_uls[] = { // video essence container uls { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ // sound essence container uls { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */ { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE }, }; 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"); 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_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); codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul); st->codec->codec_type = codec_ul->id; source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType); if (source_package->descriptor) { if (source_package->descriptor->type == MultipleDescriptor) { for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) { MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor); if (!sub_descriptor) { av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n"); continue; } if (sub_descriptor->linked_track_id == source_track->track_id) { descriptor = sub_descriptor; break; } } } else if (source_package->descriptor->type == Descriptor) descriptor = source_package->descriptor; } if (!descriptor) { av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index); continue; } PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul); PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul); essence_container_ul = &descriptor->essence_container_ul; /* HACK: replacing the original key with mxf_encrypted_essence_container * is not allowed according to s429-6, try to find correct information anyway */ if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) { av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n"); for (k = 0; k < mxf->metadata_sets_count; k++) { MXFMetadataSet *metadata = mxf->metadata_sets[k]; if (metadata->type == CryptoContext) { essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul; break; } } } /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */ codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul); st->codec->codec_id = codec_ul->id; if (descriptor->extradata) { st->codec->extradata = descriptor->extradata; st->codec->extradata_size = descriptor->extradata_size; } if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = container_ul->id; st->codec->width = descriptor->width; st->codec->height = descriptor->height; if (st->codec->codec_id == CODEC_ID_RAWVIDEO) st->codec->pix_fmt = descriptor->pix_fmt; st->need_parsing = AVSTREAM_PARSE_HEADERS; } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = container_ul->id; st->codec->channels = descriptor->channels; st->codec->bits_per_coded_sample = descriptor->bits_per_sample; st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; /* TODO: implement CODEC_ID_RAWAUDIO */ if (st->codec->codec_id == CODEC_ID_PCM_S16LE) { if (descriptor->bits_per_sample == 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 != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n"); st->need_parsing = AVSTREAM_PARSE_FULL; } } 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 }, { { 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) { ByteIOContext *pb = mxf->fc->pb; MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf; uint64_t klv_end = url_ftell(pb) + klv->length; if (!ctx) return -1; while (url_ftell(pb) + 4 < klv_end) { int tag = get_be16(pb); int size = get_be16(pb); /* KLV specified by 0x53 */ uint64_t next = url_ftell(pb) + size; UID uid = {0}; dprintf(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); dprintf(mxf->fc, "local tag %#04x\n", local_tag); PRINT_KEY(mxf->fc, "uid", uid); } } } if (ctx_size && tag == 0x3C0A) get_buffer(pb, ctx->uid, 16); else if (read_child(ctx, pb, tag, size, uid) < 0) return -1; url_fseek(pb, next, SEEK_SET); } 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); dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset); 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 res; if (klv.key[5] == 0x53) { res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type); } else res = metadata->read(mxf, s->pb, 0, 0, NULL); if (res < 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 < 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; 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, };