3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavcodec/bytestream.h"
55 enum MXFMetadataSetType type;
56 UID source_container_ul;
61 enum MXFMetadataSetType type;
62 UID source_package_uid;
63 UID data_definition_ul;
65 int64_t start_position;
67 } MXFStructuralComponent;
71 enum MXFMetadataSetType type;
72 UID data_definition_ul;
73 UID *structural_components_refs;
74 int structural_components_count;
80 enum MXFMetadataSetType type;
81 MXFSequence *sequence; /* mandatory, and only one */
84 uint8_t track_number[4];
90 enum MXFMetadataSetType type;
91 UID essence_container_ul;
93 AVRational sample_rate;
94 AVRational aspect_ratio;
99 UID *sub_descriptors_refs;
100 int sub_descriptors_count;
108 enum MXFMetadataSetType type;
109 } MXFIndexTableSegment;
113 enum MXFMetadataSetType type;
117 MXFDescriptor *descriptor; /* only one */
123 enum MXFMetadataSetType type;
129 MXFMetadataSet **metadata_sets;
130 int metadata_sets_count;
134 int local_tags_count;
137 enum MXFWrappingScheme {
146 enum MXFMetadataSetType type;
147 } MXFMetadataReadTableEntry;
149 /* partial keys to match */
150 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
151 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
152 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
153 /* complete keys to match */
154 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 };
155 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
156 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
157 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
159 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
161 static int64_t klv_decode_ber_length(ByteIOContext *pb)
163 uint64_t size = get_byte(pb);
164 if (size & 0x80) { /* long form */
165 int bytes_num = size & 0x7f;
166 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
171 size = size << 8 | get_byte(pb);
176 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
179 for (i = 0; i < size && !url_feof(pb); i++) {
183 else if (b != key[i])
189 static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
191 if (!mxf_read_sync(pb, mxf_klv_key, 4))
193 klv->offset = url_ftell(pb) - 4;
194 memcpy(klv->key, mxf_klv_key, 4);
195 get_buffer(pb, klv->key + 4, 12);
196 klv->length = klv_decode_ber_length(pb);
197 return klv->length == -1 ? -1 : 0;
200 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
204 for (i = 0; i < s->nb_streams; i++) {
205 MXFTrack *track = s->streams[i]->priv_data;
207 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
210 /* return 0 if only one stream, for OP Atom files with 0 as track number */
211 return s->nb_streams == 1 ? 0 : -1;
214 /* XXX: use AVBitStreamFilter */
215 static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
217 const uint8_t *buf_ptr, *end_ptr;
221 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
223 av_new_packet(pkt, length);
224 get_buffer(pb, pkt->data, length);
225 data_ptr = pkt->data;
226 end_ptr = pkt->data + length;
227 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
228 for (; buf_ptr < end_ptr; ) {
229 for (i = 0; i < st->codec->channels; i++) {
230 uint32_t sample = bytestream_get_le32(&buf_ptr);
231 if (st->codec->bits_per_coded_sample == 24)
232 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
234 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
236 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
238 pkt->size = data_ptr - pkt->data;
242 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
244 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
245 MXFContext *mxf = s->priv_data;
246 ByteIOContext *pb = s->pb;
247 int64_t end = url_ftell(pb) + klv->length;
250 uint64_t plaintext_size;
255 if (!mxf->aesc && s->key && s->keylen == 16) {
256 mxf->aesc = av_malloc(av_aes_size);
259 av_aes_init(mxf->aesc, s->key, 128, 1);
262 url_fskip(pb, klv_decode_ber_length(pb));
264 klv_decode_ber_length(pb);
265 plaintext_size = get_be64(pb);
267 klv_decode_ber_length(pb);
268 get_buffer(pb, klv->key, 16);
269 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
271 index = mxf_get_stream_index(s, klv);
275 klv_decode_ber_length(pb);
276 orig_size = get_be64(pb);
277 if (orig_size < plaintext_size)
280 size = klv_decode_ber_length(pb);
281 if (size < 32 || size - 32 < orig_size)
283 get_buffer(pb, ivec, 16);
284 get_buffer(pb, tmpbuf, 16);
286 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
287 if (memcmp(tmpbuf, checkv, 16))
288 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
290 av_get_packet(pb, pkt, size);
291 size -= plaintext_size;
293 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
294 &pkt->data[plaintext_size], size >> 4, ivec, 1);
295 pkt->size = orig_size;
296 pkt->stream_index = index;
297 url_fskip(pb, end - url_ftell(pb));
301 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
305 while (!url_feof(s->pb)) {
306 if (klv_read_packet(&klv, s->pb) < 0)
308 PRINT_KEY(s, "read packet", klv.key);
309 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
310 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
311 int res = mxf_decrypt_triplet(s, pkt, &klv);
313 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
318 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
319 int index = mxf_get_stream_index(s, &klv);
321 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
324 if (s->streams[index]->discard == AVDISCARD_ALL)
326 /* check for 8 channels AES3 element */
327 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
328 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
329 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
333 av_get_packet(s->pb, pkt, klv.length);
334 pkt->stream_index = index;
335 pkt->pos = klv.offset;
339 url_fskip(s->pb, klv.length);
344 static int mxf_read_primer_pack(MXFContext *mxf)
346 ByteIOContext *pb = mxf->fc->pb;
347 int item_num = get_be32(pb);
348 int item_len = get_be32(pb);
350 if (item_len != 18) {
351 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
354 if (item_num > UINT_MAX / item_len)
356 mxf->local_tags_count = item_num;
357 mxf->local_tags = av_malloc(item_num*item_len);
358 if (!mxf->local_tags)
360 get_buffer(pb, mxf->local_tags, item_num*item_len);
364 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
366 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
367 return AVERROR(ENOMEM);
368 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
369 if (!mxf->metadata_sets)
371 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
372 mxf->metadata_sets_count++;
376 static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
380 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
381 get_buffer(pb, cryptocontext->source_container_ul, 16);
385 static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
389 mxf->packages_count = get_be32(pb);
390 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
392 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
393 if (!mxf->packages_refs)
395 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
396 get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
402 static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
406 source_clip->duration = get_be64(pb);
409 source_clip->start_position = get_be64(pb);
412 /* UMID, only get last 16 bytes */
414 get_buffer(pb, source_clip->source_package_uid, 16);
417 source_clip->source_track_id = get_be32(pb);
423 static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
427 package->tracks_count = get_be32(pb);
428 if (package->tracks_count >= UINT_MAX / sizeof(UID))
430 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
431 if (!package->tracks_refs)
433 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
434 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
440 static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
444 track->track_id = get_be32(pb);
447 get_buffer(pb, track->track_number, 4);
450 track->edit_rate.den = get_be32(pb);
451 track->edit_rate.num = get_be32(pb);
454 get_buffer(pb, track->sequence_ref, 16);
460 static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
464 sequence->duration = get_be64(pb);
467 get_buffer(pb, sequence->data_definition_ul, 16);
470 sequence->structural_components_count = get_be32(pb);
471 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
473 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
474 if (!sequence->structural_components_refs)
476 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
477 get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
483 static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
487 package->tracks_count = get_be32(pb);
488 if (package->tracks_count >= UINT_MAX / sizeof(UID))
490 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
491 if (!package->tracks_refs)
493 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
494 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
497 /* UMID, only get last 16 bytes */
499 get_buffer(pb, package->package_uid, 16);
502 get_buffer(pb, package->descriptor_ref, 16);
508 static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag)
511 case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
512 case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
513 case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
514 case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
515 case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
516 case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
521 static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
527 dprintf(NULL, "pixel layout: code %#x\n", code);
530 descriptor->bits_per_sample += get_byte(pb);
533 descriptor->bits_per_sample += get_byte(pb);
536 descriptor->bits_per_sample += get_byte(pb);
541 } while (code != 0); /* SMPTE 377M E.2.46 */
544 static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
548 descriptor->sub_descriptors_count = get_be32(pb);
549 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
551 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
552 if (!descriptor->sub_descriptors_refs)
554 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
555 get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
558 get_buffer(pb, descriptor->essence_container_ul, 16);
561 descriptor->linked_track_id = get_be32(pb);
563 case 0x3201: /* PictureEssenceCoding */
564 get_buffer(pb, descriptor->essence_codec_ul, 16);
567 descriptor->width = get_be32(pb);
570 descriptor->height = get_be32(pb);
573 descriptor->aspect_ratio.num = get_be32(pb);
574 descriptor->aspect_ratio.den = get_be32(pb);
577 descriptor->sample_rate.num = get_be32(pb);
578 descriptor->sample_rate.den = get_be32(pb);
580 case 0x3D06: /* SoundEssenceCompression */
581 get_buffer(pb, descriptor->essence_codec_ul, 16);
584 descriptor->channels = get_be32(pb);
587 descriptor->bits_per_sample = get_be32(pb);
590 mxf_read_pixel_layout(pb, descriptor);
593 /* Private uid used by SONY C0023S01.mxf */
594 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
595 descriptor->extradata = av_malloc(size);
596 if (!descriptor->extradata)
598 descriptor->extradata_size = size;
599 get_buffer(pb, descriptor->extradata, size);
607 * Match an uid independently of the version byte and up to len common bytes
610 static int mxf_match_uid(const UID key, const UID uid, int len)
613 for (i = 0; i < len; i++) {
614 if (i != 7 && key[i] != uid[i])
620 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
622 while (uls->uid[0]) {
623 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
630 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
636 for (i = 0; i < mxf->metadata_sets_count; i++) {
637 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
638 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
639 return mxf->metadata_sets[i];
645 static const MXFCodecUL mxf_essence_container_uls[] = {
646 // video essence container uls
647 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
648 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
649 // sound essence container uls
650 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
651 { { 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 */
652 { { 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 */
653 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
656 static int mxf_parse_structural_metadata(MXFContext *mxf)
658 MXFPackage *material_package = NULL;
659 MXFPackage *temp_package = NULL;
662 dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
663 /* TODO: handle multiple material packages (OP3x) */
664 for (i = 0; i < mxf->packages_count; i++) {
665 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
666 if (material_package) break;
668 if (!material_package) {
669 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
673 for (i = 0; i < material_package->tracks_count; i++) {
674 MXFPackage *source_package = NULL;
675 MXFTrack *material_track = NULL;
676 MXFTrack *source_track = NULL;
677 MXFTrack *temp_track = NULL;
678 MXFDescriptor *descriptor = NULL;
679 MXFStructuralComponent *component = NULL;
680 UID *essence_container_ul = NULL;
681 const MXFCodecUL *codec_ul = NULL;
682 const MXFCodecUL *container_ul = NULL;
685 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
686 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
690 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
691 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
695 /* TODO: handle multiple source clips */
696 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
697 /* TODO: handle timecode component */
698 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
702 for (k = 0; k < mxf->packages_count; k++) {
703 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
706 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
707 source_package = temp_package;
711 if (!source_package) {
712 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
715 for (k = 0; k < source_package->tracks_count; k++) {
716 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
717 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
720 if (temp_track->track_id == component->source_track_id) {
721 source_track = temp_track;
726 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
733 st = av_new_stream(mxf->fc, source_track->track_id);
735 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
738 st->priv_data = source_track;
739 st->duration = component->duration;
740 if (st->duration == -1)
741 st->duration = AV_NOPTS_VALUE;
742 st->start_time = component->start_position;
743 av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
745 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
746 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
750 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
751 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
752 st->codec->codec_type = codec_ul->id;
754 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
755 if (source_package->descriptor) {
756 if (source_package->descriptor->type == MultipleDescriptor) {
757 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
758 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
760 if (!sub_descriptor) {
761 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
764 if (sub_descriptor->linked_track_id == source_track->track_id) {
765 descriptor = sub_descriptor;
769 } else if (source_package->descriptor->type == Descriptor)
770 descriptor = source_package->descriptor;
773 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
776 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
777 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
778 essence_container_ul = &descriptor->essence_container_ul;
779 /* HACK: replacing the original key with mxf_encrypted_essence_container
780 * is not allowed according to s429-6, try to find correct information anyway */
781 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
782 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
783 for (k = 0; k < mxf->metadata_sets_count; k++) {
784 MXFMetadataSet *metadata = mxf->metadata_sets[k];
785 if (metadata->type == CryptoContext) {
786 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
791 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
792 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
793 st->codec->codec_id = codec_ul->id;
794 if (descriptor->extradata) {
795 st->codec->extradata = descriptor->extradata;
796 st->codec->extradata_size = descriptor->extradata_size;
798 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
799 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
800 if (st->codec->codec_id == CODEC_ID_NONE)
801 st->codec->codec_id = container_ul->id;
802 st->codec->width = descriptor->width;
803 st->codec->height = descriptor->height;
804 st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
805 st->need_parsing = AVSTREAM_PARSE_HEADERS;
806 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
807 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
808 if (st->codec->codec_id == CODEC_ID_NONE)
809 st->codec->codec_id = container_ul->id;
810 st->codec->channels = descriptor->channels;
811 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
812 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
813 /* TODO: implement CODEC_ID_RAWAUDIO */
814 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
815 if (descriptor->bits_per_sample == 24)
816 st->codec->codec_id = CODEC_ID_PCM_S24LE;
817 else if (descriptor->bits_per_sample == 32)
818 st->codec->codec_id = CODEC_ID_PCM_S32LE;
819 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
820 if (descriptor->bits_per_sample == 24)
821 st->codec->codec_id = CODEC_ID_PCM_S24BE;
822 else if (descriptor->bits_per_sample == 32)
823 st->codec->codec_id = CODEC_ID_PCM_S32BE;
824 } else if (st->codec->codec_id == CODEC_ID_MP2) {
825 st->need_parsing = AVSTREAM_PARSE_FULL;
828 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
829 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
830 st->need_parsing = AVSTREAM_PARSE_FULL;
836 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
837 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
838 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
839 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
840 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
841 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
842 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
843 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
844 { { 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 */
845 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
846 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
847 { { 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 */
848 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
849 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
850 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
851 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
852 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
853 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
854 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
857 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
859 ByteIOContext *pb = mxf->fc->pb;
860 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
861 uint64_t klv_end = url_ftell(pb) + klv->length;
865 while (url_ftell(pb) + 4 < klv_end) {
866 int tag = get_be16(pb);
867 int size = get_be16(pb); /* KLV specified by 0x53 */
868 uint64_t next = url_ftell(pb) + size;
871 dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
872 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
873 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
876 if (tag > 0x7FFF) { /* dynamic tag */
878 for (i = 0; i < mxf->local_tags_count; i++) {
879 int local_tag = AV_RB16(mxf->local_tags+i*18);
880 if (local_tag == tag) {
881 memcpy(uid, mxf->local_tags+i*18+2, 16);
882 dprintf(mxf->fc, "local tag %#04x\n", local_tag);
883 PRINT_KEY(mxf->fc, "uid", uid);
887 if (ctx_size && tag == 0x3C0A)
888 get_buffer(pb, ctx->uid, 16);
889 else if (read_child(ctx, pb, tag, size, uid) < 0)
892 url_fseek(pb, next, SEEK_SET);
894 if (ctx_size) ctx->type = type;
895 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
898 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
900 MXFContext *mxf = s->priv_data;
903 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
904 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
907 url_fseek(s->pb, -14, SEEK_CUR);
909 while (!url_feof(s->pb)) {
910 const MXFMetadataReadTableEntry *metadata;
912 if (klv_read_packet(&klv, s->pb) < 0)
914 PRINT_KEY(s, "read header", klv.key);
915 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
916 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
917 IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
918 /* FIXME avoid seek */
919 url_fseek(s->pb, klv.offset, SEEK_SET);
923 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
924 if (IS_KLV_KEY(klv.key, metadata->key)) {
925 int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
926 if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
927 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
934 url_fskip(s->pb, klv.length);
936 return mxf_parse_structural_metadata(mxf);
939 static int mxf_read_close(AVFormatContext *s)
941 MXFContext *mxf = s->priv_data;
944 av_freep(&mxf->packages_refs);
946 for (i = 0; i < s->nb_streams; i++)
947 s->streams[i]->priv_data = NULL;
949 for (i = 0; i < mxf->metadata_sets_count; i++) {
950 switch (mxf->metadata_sets[i]->type) {
951 case MultipleDescriptor:
952 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
955 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
958 case MaterialPackage:
959 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
964 av_freep(&mxf->metadata_sets[i]);
966 av_freep(&mxf->metadata_sets);
967 av_freep(&mxf->aesc);
968 av_freep(&mxf->local_tags);
972 static int mxf_probe(AVProbeData *p) {
973 uint8_t *bufp = p->buf;
974 uint8_t *end = p->buf + p->buf_size;
976 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
979 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
980 end -= sizeof(mxf_header_partition_pack_key);
981 for (; bufp < end; bufp++) {
982 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
983 return AVPROBE_SCORE_MAX;
988 /* rudimentary byte seek */
989 /* XXX: use MXF Index */
990 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
992 AVStream *st = s->streams[stream_index];
999 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1000 url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1001 av_update_cur_dts(s, st, sample_time);
1005 AVInputFormat mxf_demuxer = {
1007 NULL_IF_CONFIG_SMALL("Material eXchange Format"),