| /* |
| * 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; |
| } 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 struct { |
| const UID key; |
| int (*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) |
| { |
| uint8_t buffer[61444]; |
| 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; |
| get_buffer(pb, buffer, length); |
| av_new_packet(pkt, length); |
| data_ptr = pkt->data; |
| end_ptr = buffer + length; |
| buf_ptr = buffer + 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(EIO); |
| } |
| |
| static int mxf_read_primer_pack(MXFContext *mxf) |
| { |
| ByteIOContext *pb = mxf->fc->pb; |
| 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) |
| { |
| 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(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid) |
| { |
| 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(MXFContext *mxf, ByteIOContext *pb, int tag) |
| { |
| 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(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag) |
| { |
| 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(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; |
| } |
| return 0; |
| } |
| |
| static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag) |
| { |
| 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(MXFSequence *sequence, ByteIOContext *pb, int tag) |
| { |
| 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(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 int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag) |
| { |
| 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; |
| |
| do { |
| code = get_byte(pb); |
| dprintf(NULL, "pixel layout: code %#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->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"); |
| 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); |
| 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 == CODEC_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; |
| st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */ |
| st->need_parsing = AVSTREAM_PARSE_HEADERS; |
| } else if (st->codec->codec_type == CODEC_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 != 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 }, |
| { { 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, int (*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 (*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, |
| }; |
