diff options
Diffstat (limited to 'ffmpeg/libavformat/mxfdec.c')
| -rw-r--r-- | ffmpeg/libavformat/mxfdec.c | 2392 |
1 files changed, 2392 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/mxfdec.c b/ffmpeg/libavformat/mxfdec.c new file mode 100644 index 0000000..4580e1b --- /dev/null +++ b/ffmpeg/libavformat/mxfdec.c @@ -0,0 +1,2392 @@ +/* + * 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 "libavutil/avassert.h" +#include "libavutil/mathematics.h" +#include "libavcodec/bytestream.h" +#include "libavutil/timecode.h" +#include "avformat.h" +#include "internal.h" +#include "mxf.h" + +typedef enum { + Header, + BodyPartition, + Footer +} MXFPartitionType; + +typedef enum { + OP1a = 1, + OP1b, + OP1c, + OP2a, + OP2b, + OP2c, + OP3a, + OP3b, + OP3c, + OPAtom, + OPSONYOpt, /* FATE sample, violates the spec in places */ +} MXFOP; + +typedef struct { + int closed; + int complete; + MXFPartitionType type; + uint64_t previous_partition; + int index_sid; + int body_sid; + int64_t this_partition; + int64_t essence_offset; ///< absolute offset of essence + int64_t essence_length; + int32_t kag_size; + int64_t header_byte_count; + int64_t index_byte_count; + int pack_length; +} MXFPartition; + +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; + int drop_frame; + int start_frame; + struct AVRational rate; + AVTimecode tc; +} MXFTimecodeComponent; + +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; + int intra_only; + uint64_t sample_count; + int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate +} 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; /* Field height, not frame height */ + int frame_layout; /* See MXFFrameLayout enum */ + int channels; + int bits_per_sample; + int field_dominance; + unsigned int component_depth; + unsigned int horiz_subsampling; + unsigned int vert_subsampling; + UID *sub_descriptors_refs; + int sub_descriptors_count; + int linked_track_id; + uint8_t *extradata; + int extradata_size; + enum AVPixelFormat pix_fmt; +} MXFDescriptor; + +typedef struct { + UID uid; + enum MXFMetadataSetType type; + int edit_unit_byte_count; + int index_sid; + int body_sid; + AVRational index_edit_rate; + uint64_t index_start_position; + uint64_t index_duration; + int8_t *temporal_offset_entries; + int *flag_entries; + uint64_t *stream_offset_entries; + int nb_index_entries; +} 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; + +/* decoded index table */ +typedef struct { + int index_sid; + int body_sid; + int nb_ptses; /* number of PTSes or total duration of index */ + int64_t first_dts; /* DTS = EditUnit + first_dts */ + int64_t *ptses; /* maps EditUnit -> PTS */ + int nb_segments; + MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */ + AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */ +} MXFIndexTable; + +typedef struct { + MXFPartition *partitions; + unsigned partitions_count; + MXFOP op; + 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; + uint64_t footer_partition; + KLVPacket current_klv_data; + int current_klv_index; + int run_in; + MXFPartition *current_partition; + int parsing_backward; + int64_t last_forward_tell; + int last_forward_partition; + int current_edit_unit; + int nb_index_tables; + MXFIndexTable *index_tables; + int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom) +} MXFContext; + +enum MXFWrappingScheme { + Frame, + Clip, +}; + +/* NOTE: klv_offset is not set (-1) for local keys */ +typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset); + +typedef struct { + const UID key; + MXFMetadataReadFunc *read; + int ctx_size; + enum MXFMetadataSetType type; +} MXFMetadataReadTableEntry; + +static int mxf_read_close(AVFormatContext *s); + +/* 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_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 }; +static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 }; +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(AVIOContext *pb) +{ + uint64_t size = avio_r8(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 AVERROR_INVALIDDATA; + size = 0; + while (bytes_num--) + size = size << 8 | avio_r8(pb); + } + return size; +} + +static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size) +{ + int i, b; + for (i = 0; i < size && !url_feof(pb); i++) { + b = avio_r8(pb); + if (b == key[0]) + i = 0; + else if (b != key[i]) + i = -1; + } + return i == size; +} + +static int klv_read_packet(KLVPacket *klv, AVIOContext *pb) +{ + if (!mxf_read_sync(pb, mxf_klv_key, 4)) + return AVERROR_INVALIDDATA; + klv->offset = avio_tell(pb) - 4; + memcpy(klv->key, mxf_klv_key, 4); + avio_read(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(AVIOContext *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 AVERROR_INVALIDDATA; + length = av_get_packet(pb, pkt, length); + if (length < 0) + return length; + data_ptr = pkt->data; + end_ptr = pkt->data + length; + buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */ + for (; buf_ptr + st->codec->channels*4 <= 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 + } + av_shrink_packet(pkt, 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; + AVIOContext *pb = s->pb; + int64_t end = avio_tell(pb) + klv->length; + int64_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_aes_alloc(); + if (!mxf->aesc) + return AVERROR(ENOMEM); + av_aes_init(mxf->aesc, s->key, 128, 1); + } + // crypto context + avio_skip(pb, klv_decode_ber_length(pb)); + // plaintext offset + klv_decode_ber_length(pb); + plaintext_size = avio_rb64(pb); + // source klv key + klv_decode_ber_length(pb); + avio_read(pb, klv->key, 16); + if (!IS_KLV_KEY(klv, mxf_essence_element_key)) + return AVERROR_INVALIDDATA; + index = mxf_get_stream_index(s, klv); + if (index < 0) + return AVERROR_INVALIDDATA; + // source size + klv_decode_ber_length(pb); + orig_size = avio_rb64(pb); + if (orig_size < plaintext_size) + return AVERROR_INVALIDDATA; + // enc. code + size = klv_decode_ber_length(pb); + if (size < 32 || size - 32 < orig_size) + return AVERROR_INVALIDDATA; + avio_read(pb, ivec, 16); + avio_read(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; + size = av_get_packet(pb, pkt, size); + if (size < 0) + return size; + else if (size < plaintext_size) + return AVERROR_INVALIDDATA; + size -= plaintext_size; + if (mxf->aesc) + av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size], + &pkt->data[plaintext_size], size >> 4, ivec, 1); + av_shrink_packet(pkt, orig_size); + pkt->stream_index = index; + avio_skip(pb, end - avio_tell(pb)); + return 0; +} + +static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFContext *mxf = arg; + int item_num = avio_rb32(pb); + int item_len = avio_rb32(pb); + + if (item_len != 18) { + avpriv_request_sample(pb, "Primer pack item length %d", item_len); + return AVERROR_PATCHWELCOME; + } + if (item_num > 65536) { + av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num); + return AVERROR_INVALIDDATA; + } + mxf->local_tags = av_calloc(item_num, item_len); + if (!mxf->local_tags) + return AVERROR(ENOMEM); + mxf->local_tags_count = item_num; + avio_read(pb, mxf->local_tags, item_num*item_len); + return 0; +} + +static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFContext *mxf = arg; + MXFPartition *partition, *tmp_part; + UID op; + uint64_t footer_partition; + uint32_t nb_essence_containers; + + if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions)) + return AVERROR(ENOMEM); + + tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions)); + if (!tmp_part) + return AVERROR(ENOMEM); + mxf->partitions = tmp_part; + + if (mxf->parsing_backward) { + /* insert the new partition pack in the middle + * this makes the entries in mxf->partitions sorted by offset */ + memmove(&mxf->partitions[mxf->last_forward_partition+1], + &mxf->partitions[mxf->last_forward_partition], + (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions)); + partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition]; + } else { + mxf->last_forward_partition++; + partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count]; + } + + memset(partition, 0, sizeof(*partition)); + mxf->partitions_count++; + partition->pack_length = avio_tell(pb) - klv_offset + size; + + switch(uid[13]) { + case 2: + partition->type = Header; + break; + case 3: + partition->type = BodyPartition; + break; + case 4: + partition->type = Footer; + break; + default: + av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]); + return AVERROR_INVALIDDATA; + } + + /* consider both footers to be closed (there is only Footer and CompleteFooter) */ + partition->closed = partition->type == Footer || !(uid[14] & 1); + partition->complete = uid[14] > 2; + avio_skip(pb, 4); + partition->kag_size = avio_rb32(pb); + partition->this_partition = avio_rb64(pb); + partition->previous_partition = avio_rb64(pb); + footer_partition = avio_rb64(pb); + partition->header_byte_count = avio_rb64(pb); + partition->index_byte_count = avio_rb64(pb); + partition->index_sid = avio_rb32(pb); + avio_skip(pb, 8); + partition->body_sid = avio_rb32(pb); + avio_read(pb, op, sizeof(UID)); + nb_essence_containers = avio_rb32(pb); + + /* some files don'thave FooterPartition set in every partition */ + if (footer_partition) { + if (mxf->footer_partition && mxf->footer_partition != footer_partition) { + av_log(mxf->fc, AV_LOG_ERROR, + "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n", + mxf->footer_partition, footer_partition); + } else { + mxf->footer_partition = footer_partition; + } + } + + av_dlog(mxf->fc, + "PartitionPack: ThisPartition = 0x%"PRIX64 + ", PreviousPartition = 0x%"PRIX64", " + "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n", + partition->this_partition, + partition->previous_partition, footer_partition, + partition->index_sid, partition->body_sid); + + /* sanity check PreviousPartition if set */ + if (partition->previous_partition && + mxf->run_in + partition->previous_partition >= klv_offset) { + av_log(mxf->fc, AV_LOG_ERROR, + "PreviousPartition points to this partition or forward\n"); + return AVERROR_INVALIDDATA; + } + + if (op[12] == 1 && op[13] == 1) mxf->op = OP1a; + else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b; + else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c; + else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a; + else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b; + else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c; + else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a; + else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b; + else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c; + else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt; + else if (op[12] == 0x10) { + /* SMPTE 390m: "There shall be exactly one essence container" + * The following block deals with files that violate this, namely: + * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a + * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */ + if (nb_essence_containers != 1) { + MXFOP op = nb_essence_containers ? OP1a : OPAtom; + + /* only nag once */ + if (!mxf->op) + av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n", + nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom"); + + mxf->op = op; + } else + mxf->op = OPAtom; + } else { + av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]); + mxf->op = OP1a; + } + + if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) { + av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size); + + if (mxf->op == OPSONYOpt) + partition->kag_size = 512; + else + partition->kag_size = 1; + + av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size); + } + + return 0; +} + +static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) +{ + MXFMetadataSet **tmp; + if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets)) + return AVERROR(ENOMEM); + tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); + if (!tmp) + return AVERROR(ENOMEM); + mxf->metadata_sets = tmp; + mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set; + mxf->metadata_sets_count++; + return 0; +} + +static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFCryptoContext *cryptocontext = arg; + if (size != 16) + return AVERROR_INVALIDDATA; + if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul)) + avio_read(pb, cryptocontext->source_container_ul, 16); + return 0; +} + +static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFContext *mxf = arg; + switch (tag) { + case 0x1901: + mxf->packages_count = avio_rb32(pb); + mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID)); + if (!mxf->packages_refs) + return AVERROR(ENOMEM); + avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */ + avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID)); + break; + } + return 0; +} + +static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFStructuralComponent *source_clip = arg; + switch(tag) { + case 0x0202: + source_clip->duration = avio_rb64(pb); + break; + case 0x1201: + source_clip->start_position = avio_rb64(pb); + break; + case 0x1101: + /* UMID, only get last 16 bytes */ + avio_skip(pb, 16); + avio_read(pb, source_clip->source_package_uid, 16); + break; + case 0x1102: + source_clip->source_track_id = avio_rb32(pb); + break; + } + return 0; +} + +static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFPackage *package = arg; + switch(tag) { + case 0x4403: + package->tracks_count = avio_rb32(pb); + package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID)); + if (!package->tracks_refs) + return AVERROR(ENOMEM); + avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */ + avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); + break; + } + return 0; +} + +static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFTimecodeComponent *mxf_timecode = arg; + switch(tag) { + case 0x1501: + mxf_timecode->start_frame = avio_rb64(pb); + break; + case 0x1502: + mxf_timecode->rate = (AVRational){avio_rb16(pb), 1}; + break; + case 0x1503: + mxf_timecode->drop_frame = avio_r8(pb); + break; + } + return 0; +} + +static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFTrack *track = arg; + switch(tag) { + case 0x4801: + track->track_id = avio_rb32(pb); + break; + case 0x4804: + avio_read(pb, track->track_number, 4); + break; + case 0x4B01: + track->edit_rate.num = avio_rb32(pb); + track->edit_rate.den = avio_rb32(pb); + break; + case 0x4803: + avio_read(pb, track->sequence_ref, 16); + break; + } + return 0; +} + +static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFSequence *sequence = arg; + switch(tag) { + case 0x0202: + sequence->duration = avio_rb64(pb); + break; + case 0x0201: + avio_read(pb, sequence->data_definition_ul, 16); + break; + case 0x1001: + sequence->structural_components_count = avio_rb32(pb); + sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID)); + if (!sequence->structural_components_refs) + return AVERROR(ENOMEM); + avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */ + avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID)); + break; + } + return 0; +} + +static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFPackage *package = arg; + switch(tag) { + case 0x4403: + package->tracks_count = avio_rb32(pb); + package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID)); + if (!package->tracks_refs) + return AVERROR(ENOMEM); + avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */ + avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); + break; + case 0x4401: + /* UMID, only get last 16 bytes */ + avio_skip(pb, 16); + avio_read(pb, package->package_uid, 16); + break; + case 0x4701: + avio_read(pb, package->descriptor_ref, 16); + break; + } + return 0; +} + +static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment) +{ + int i, length; + + segment->nb_index_entries = avio_rb32(pb); + + length = avio_rb32(pb); + + if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) || + !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) || + !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) + return AVERROR(ENOMEM); + + for (i = 0; i < segment->nb_index_entries; i++) { + segment->temporal_offset_entries[i] = avio_r8(pb); + avio_r8(pb); /* KeyFrameOffset */ + segment->flag_entries[i] = avio_r8(pb); + segment->stream_offset_entries[i] = avio_rb64(pb); + avio_skip(pb, length - 11); + } + return 0; +} + +static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFIndexTableSegment *segment = arg; + switch(tag) { + case 0x3F05: + segment->edit_unit_byte_count = avio_rb32(pb); + av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count); + break; + case 0x3F06: + segment->index_sid = avio_rb32(pb); + av_dlog(NULL, "IndexSID %d\n", segment->index_sid); + break; + case 0x3F07: + segment->body_sid = avio_rb32(pb); + av_dlog(NULL, "BodySID %d\n", segment->body_sid); + break; + case 0x3F0A: + av_dlog(NULL, "IndexEntryArray found\n"); + return mxf_read_index_entry_array(pb, segment); + case 0x3F0B: + segment->index_edit_rate.num = avio_rb32(pb); + segment->index_edit_rate.den = avio_rb32(pb); + av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num, + segment->index_edit_rate.den); + break; + case 0x3F0C: + segment->index_start_position = avio_rb64(pb); + av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position); + break; + case 0x3F0D: + segment->index_duration = avio_rb64(pb); + av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration); + break; + } + return 0; +} + +static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor) +{ + int code, value, ofs = 0; + char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */ + + do { + code = avio_r8(pb); + value = avio_r8(pb); + av_dlog(NULL, "pixel layout: code %#x\n", code); + + if (ofs <= 14) { + layout[ofs++] = code; + layout[ofs++] = value; + } else + break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */ + } while (code != 0); /* SMPTE 377M E.2.46 */ + + ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt); +} + +static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) +{ + MXFDescriptor *descriptor = arg; + descriptor->pix_fmt = AV_PIX_FMT_NONE; + switch(tag) { + case 0x3F01: + descriptor->sub_descriptors_count = avio_rb32(pb); + descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID)); + if (!descriptor->sub_descriptors_refs) + return AVERROR(ENOMEM); + avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */ + avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID)); + break; + case 0x3004: + avio_read(pb, descriptor->essence_container_ul, 16); + break; + case 0x3006: + descriptor->linked_track_id = avio_rb32(pb); + break; + case 0x3201: /* PictureEssenceCoding */ + avio_read(pb, descriptor->essence_codec_ul, 16); + break; + case 0x3203: + descriptor->width = avio_rb32(pb); + break; + case 0x3202: + descriptor->height = avio_rb32(pb); + break; + case 0x320C: + descriptor->frame_layout = avio_r8(pb); + break; + case 0x320E: + descriptor->aspect_ratio.num = avio_rb32(pb); + descriptor->aspect_ratio.den = avio_rb32(pb); + break; + case 0x3212: + descriptor->field_dominance = avio_r8(pb); + break; + case 0x3301: + descriptor->component_depth = avio_rb32(pb); + break; + case 0x3302: + descriptor->horiz_subsampling = avio_rb32(pb); + break; + case 0x3308: + descriptor->vert_subsampling = avio_rb32(pb); + break; + case 0x3D03: + descriptor->sample_rate.num = avio_rb32(pb); + descriptor->sample_rate.den = avio_rb32(pb); + break; + case 0x3D06: /* SoundEssenceCompression */ + avio_read(pb, descriptor->essence_codec_ul, 16); + break; + case 0x3D07: + descriptor->channels = avio_rb32(pb); + break; + case 0x3D01: + descriptor->bits_per_sample = avio_rb32(pb); + break; + case 0x3401: + mxf_read_pixel_layout(pb, descriptor); + break; + default: + /* Private uid used by SONY C0023S01.mxf */ + if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) { + if (descriptor->extradata) + av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n"); + av_free(descriptor->extradata); + descriptor->extradata_size = 0; + descriptor->extradata = av_malloc(size); + if (!descriptor->extradata) + return AVERROR(ENOMEM); + descriptor->extradata_size = size; + avio_read(pb, descriptor->extradata, size); + } + break; + } + return 0; +} + +/* + * Match an uid independently of the version byte and up to len common bytes + * Returns: boolean + */ +static int mxf_match_uid(const UID key, const UID uid, int len) +{ + int i; + for (i = 0; i < len; i++) { + if (i != 7 && key[i] != uid[i]) + return 0; + } + return 1; +} + +static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid) +{ + while (uls->uid[0]) { + if(mxf_match_uid(uls->uid, *uid, uls->matching_len)) + break; + uls++; + } + return uls; +} + +static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type) +{ + int i; + + if (!strong_ref) + return NULL; + for (i = 0; i < mxf->metadata_sets_count; i++) { + if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) && + (type == AnyType || mxf->metadata_sets[i]->type == type)) { + return mxf->metadata_sets[i]; + } + } + return NULL; +} + +static const MXFCodecUL mxf_picture_essence_container_uls[] = { + // video essence container uls + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, +}; + +/* EC ULs for intra-only formats */ +static const MXFCodecUL mxf_intra_only_essence_container_uls[] = { + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, +}; + +/* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */ +static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = { + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, +}; + +static const MXFCodecUL mxf_sound_essence_container_uls[] = { + // sound essence container uls + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */ + { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */ + { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE }, +}; + +static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments) +{ + int i, j, nb_segments = 0; + MXFIndexTableSegment **unsorted_segments; + int last_body_sid = -1, last_index_sid = -1, last_index_start = -1; + + /* count number of segments, allocate arrays and copy unsorted segments */ + for (i = 0; i < mxf->metadata_sets_count; i++) + if (mxf->metadata_sets[i]->type == IndexTableSegment) + nb_segments++; + + if (!nb_segments) + return AVERROR_INVALIDDATA; + + if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) || + !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) { + av_freep(sorted_segments); + av_free(unsorted_segments); + return AVERROR(ENOMEM); + } + + for (i = j = 0; i < mxf->metadata_sets_count; i++) + if (mxf->metadata_sets[i]->type == IndexTableSegment) + unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i]; + + *nb_sorted_segments = 0; + + /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */ + for (i = 0; i < nb_segments; i++) { + int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1; + uint64_t best_index_duration = 0; + + for (j = 0; j < nb_segments; j++) { + MXFIndexTableSegment *s = unsorted_segments[j]; + + /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates. + * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around. + * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have. + */ + if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) && + (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start || + (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) { + best = j; + best_body_sid = s->body_sid; + best_index_sid = s->index_sid; + best_index_start = s->index_start_position; + best_index_duration = s->index_duration; + } + } + + /* no suitable entry found -> we're done */ + if (best == -1) + break; + + (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best]; + last_body_sid = best_body_sid; + last_index_sid = best_index_sid; + last_index_start = best_index_start; + } + + av_free(unsorted_segments); + + return 0; +} + +/** + * Computes the absolute file offset of the given essence container offset + */ +static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out) +{ + int x; + int64_t offset_in = offset; /* for logging */ + + for (x = 0; x < mxf->partitions_count; x++) { + MXFPartition *p = &mxf->partitions[x]; + + if (p->body_sid != body_sid) + continue; + + if (offset < p->essence_length || !p->essence_length) { + *offset_out = p->essence_offset + offset; + return 0; + } + + offset -= p->essence_length; + } + + av_log(mxf->fc, AV_LOG_ERROR, + "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n", + offset_in, body_sid); + + return AVERROR_INVALIDDATA; +} + +/** + * Returns the end position of the essence container with given BodySID, or zero if unknown + */ +static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid) +{ + int x; + int64_t ret = 0; + + for (x = 0; x < mxf->partitions_count; x++) { + MXFPartition *p = &mxf->partitions[x]; + + if (p->body_sid != body_sid) + continue; + + if (!p->essence_length) + return 0; + + ret = p->essence_offset + p->essence_length; + } + + return ret; +} + +/* EditUnit -> absolute offset */ +static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag) +{ + int i; + int64_t offset_temp = 0; + + for (i = 0; i < index_table->nb_segments; i++) { + MXFIndexTableSegment *s = index_table->segments[i]; + + edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */ + + if (edit_unit < s->index_start_position + s->index_duration) { + int64_t index = edit_unit - s->index_start_position; + + if (s->edit_unit_byte_count) + offset_temp += s->edit_unit_byte_count * index; + else if (s->nb_index_entries) { + if (s->nb_index_entries == 2 * s->index_duration + 1) + index *= 2; /* Avid index */ + + if (index < 0 || index >= s->nb_index_entries) { + av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n", + index_table->index_sid, s->index_start_position); + return AVERROR_INVALIDDATA; + } + + offset_temp = s->stream_offset_entries[index]; + } else { + av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n", + index_table->index_sid, s->index_start_position); + return AVERROR_INVALIDDATA; + } + + if (edit_unit_out) + *edit_unit_out = edit_unit; + + return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out); + } else { + /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */ + offset_temp += s->edit_unit_byte_count * s->index_duration; + } + } + + if (nag) + av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid); + + return AVERROR_INVALIDDATA; +} + +static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table) +{ + int i, j, x; + int8_t max_temporal_offset = -128; + + /* first compute how many entries we have */ + for (i = 0; i < index_table->nb_segments; i++) { + MXFIndexTableSegment *s = index_table->segments[i]; + + if (!s->nb_index_entries) { + index_table->nb_ptses = 0; + return 0; /* no TemporalOffsets */ + } + + index_table->nb_ptses += s->index_duration; + } + + /* paranoid check */ + if (index_table->nb_ptses <= 0) + return 0; + + if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) || + !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) { + av_freep(&index_table->ptses); + return AVERROR(ENOMEM); + } + + /* we may have a few bad TemporalOffsets + * make sure the corresponding PTSes don't have the bogus value 0 */ + for (x = 0; x < index_table->nb_ptses; x++) + index_table->ptses[x] = AV_NOPTS_VALUE; + + /** + * We have this: + * + * x TemporalOffset + * 0: 0 + * 1: 1 + * 2: 1 + * 3: -2 + * 4: 1 + * 5: 1 + * 6: -2 + * + * We want to transform it into this: + * + * x DTS PTS + * 0: -1 0 + * 1: 0 3 + * 2: 1 1 + * 3: 2 2 + * 4: 3 6 + * 5: 4 4 + * 6: 5 5 + * + * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses, + * then settings mxf->first_dts = -max(TemporalOffset[x]). + * The latter makes DTS <= PTS. + */ + for (i = x = 0; i < index_table->nb_segments; i++) { + MXFIndexTableSegment *s = index_table->segments[i]; + int index_delta = 1; + int n = s->nb_index_entries; + + if (s->nb_index_entries == 2 * s->index_duration + 1) { + index_delta = 2; /* Avid index */ + /* ignore the last entry - it's the size of the essence container */ + n--; + } + + for (j = 0; j < n; j += index_delta, x++) { + int offset = s->temporal_offset_entries[j] / index_delta; + int index = x + offset; + + if (x >= index_table->nb_ptses) { + av_log(mxf->fc, AV_LOG_ERROR, + "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n", + s->nb_index_entries, s->index_duration); + break; + } + + index_table->fake_index[x].timestamp = x; + index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0; + + if (index < 0 || index >= index_table->nb_ptses) { + av_log(mxf->fc, AV_LOG_ERROR, + "index entry %i + TemporalOffset %i = %i, which is out of bounds\n", + x, offset, index); + continue; + } + + index_table->ptses[index] = x; + max_temporal_offset = FFMAX(max_temporal_offset, offset); + } + } + + index_table->first_dts = -max_temporal_offset; + + return 0; +} + +/** + * Sorts and collects index table segments into index tables. + * Also computes PTSes if possible. + */ +static int mxf_compute_index_tables(MXFContext *mxf) +{ + int i, j, k, ret, nb_sorted_segments; + MXFIndexTableSegment **sorted_segments = NULL; + + if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) || + nb_sorted_segments <= 0) { + av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n"); + return 0; + } + + /* sanity check and count unique BodySIDs/IndexSIDs */ + for (i = 0; i < nb_sorted_segments; i++) { + if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) + mxf->nb_index_tables++; + else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) { + av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n"); + ret = AVERROR_INVALIDDATA; + goto finish_decoding_index; + } + } + + if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) { + av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n"); + ret = AVERROR(ENOMEM); + goto finish_decoding_index; + } + + /* distribute sorted segments to index tables */ + for (i = j = 0; i < nb_sorted_segments; i++) { + if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) { + /* next IndexSID */ + j++; + } + + mxf->index_tables[j].nb_segments++; + } + + for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) { + MXFIndexTable *t = &mxf->index_tables[j]; + + if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) { + av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n"); + ret = AVERROR(ENOMEM); + goto finish_decoding_index; + } + + if (sorted_segments[i]->index_start_position) + av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n", + sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position); + + memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*)); + t->index_sid = sorted_segments[i]->index_sid; + t->body_sid = sorted_segments[i]->body_sid; + + if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0) + goto finish_decoding_index; + + /* fix zero IndexDurations */ + for (k = 0; k < t->nb_segments; k++) { + if (t->segments[k]->index_duration) + continue; + + if (t->nb_segments > 1) + av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n", + t->index_sid, k); + + if (mxf->fc->nb_streams <= 0) { + av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n"); + break; + } + + /* assume the first stream's duration is reasonable + * leave index_duration = 0 on further segments in case we have any (unlikely) + */ + t->segments[k]->index_duration = mxf->fc->streams[0]->duration; + break; + } + } + + ret = 0; +finish_decoding_index: + av_free(sorted_segments); + return ret; +} + +static int mxf_is_intra_only(MXFDescriptor *descriptor) +{ + return mxf_get_codec_ul(mxf_intra_only_essence_container_uls, + &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE || + mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls, + &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE; +} + +static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc) +{ + char buf[AV_TIMECODE_STR_SIZE]; + av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0); + + return 0; +} + +static int mxf_parse_structural_metadata(MXFContext *mxf) +{ + MXFPackage *material_package = NULL; + MXFPackage *temp_package = NULL; + int i, j, k, ret; + + av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count); + /* TODO: handle multiple material packages (OP3x) */ + for (i = 0; i < mxf->packages_count; i++) { + material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage); + if (material_package) break; + } + if (!material_package) { + av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n"); + return AVERROR_INVALIDDATA; + } + + for (i = 0; i < material_package->tracks_count; i++) { + MXFPackage *source_package = NULL; + MXFTrack *material_track = NULL; + MXFTrack *source_track = NULL; + MXFTrack *temp_track = NULL; + MXFDescriptor *descriptor = NULL; + MXFStructuralComponent *component = NULL; + MXFTimecodeComponent *mxf_tc = NULL; + UID *essence_container_ul = NULL; + const MXFCodecUL *codec_ul = NULL; + const MXFCodecUL *container_ul = NULL; + const MXFCodecUL *pix_fmt_ul = NULL; + AVStream *st; + AVTimecode tc; + int flags; + + 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 ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) { + mxf_tc = (MXFTimecodeComponent*)component; + flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0; + if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) { + mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc); + } + } + + 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; + } + + for (j = 0; j < material_track->sequence->structural_components_count; j++) { + component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent); + if (!component) + continue; + + mxf_tc = (MXFTimecodeComponent*)component; + flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0; + if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) { + mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc); + break; + } + } + + /* TODO: handle multiple source clips */ + for (j = 0; j < material_track->sequence->structural_components_count; j++) { + component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip); + if (!component) + continue; + + for (k = 0; k < mxf->packages_count; k++) { + temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage); + if (!temp_package) + continue; + if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) { + source_package = temp_package; + break; + } + } + if (!source_package) { + av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id); + break; + } + for (k = 0; k < source_package->tracks_count; k++) { + if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n"); + ret = AVERROR_INVALIDDATA; + goto fail_and_free; + } + if (temp_track->track_id == component->source_track_id) { + source_track = temp_track; + break; + } + } + if (!source_track) { + av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id); + break; + } + } + if (!source_track || !component) + continue; + + if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) { + av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n"); + ret = AVERROR_INVALIDDATA; + goto fail_and_free; + } + + /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf + * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */ + if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) { + av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id); + continue; + } + + st = avformat_new_stream(mxf->fc, NULL); + if (!st) { + av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n"); + ret = AVERROR(ENOMEM); + goto fail_and_free; + } + st->id = source_track->track_id; + st->priv_data = source_track; + source_track->original_duration = st->duration = component->duration; + if (st->duration == -1) + st->duration = AV_NOPTS_VALUE; + st->start_time = component->start_position; + if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) { + av_log(mxf->fc, AV_LOG_WARNING, + "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n", + material_track->edit_rate.num, material_track->edit_rate.den, st->index); + material_track->edit_rate = (AVRational){25, 1}; + } + avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num); + + /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */ + source_track->edit_rate = material_track->edit_rate; + + 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 = (enum AVCodecID)codec_ul->id; + av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ", + avcodec_get_name(st->codec->codec_id)); + for (k = 0; k < 16; k++) { + av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x", + descriptor->essence_codec_ul[k]); + if (!(k+1 & 19) || k == 5) + av_log(mxf->fc, AV_LOG_VERBOSE, "."); + } + av_log(mxf->fc, AV_LOG_VERBOSE, "\n"); + if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { + source_track->intra_only = mxf_is_intra_only(descriptor); + container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul); + if (st->codec->codec_id == AV_CODEC_ID_NONE) + st->codec->codec_id = container_ul->id; + st->codec->width = descriptor->width; + st->codec->height = descriptor->height; /* Field height, not frame height */ + switch (descriptor->frame_layout) { + case SegmentedFrame: + /* This one is a weird layout I don't fully understand. */ + av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n"); + break; + case FullFrame: + st->codec->field_order = AV_FIELD_PROGRESSIVE; + break; + case OneField: + /* Every other line is stored and needs to be duplicated. */ + av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n"); + break; /* The correct thing to do here is fall through, but by breaking we might be + able to decode some streams at half the vertical resolution, rather than not al all. + It's also for compatibility with the old behavior. */ + case MixedFields: + break; + case SeparateFields: + st->codec->height *= 2; /* Turn field height into frame height. */ + break; + default: + av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout); + } + if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) { + st->codec->pix_fmt = descriptor->pix_fmt; + if (st->codec->pix_fmt == AV_PIX_FMT_NONE) { + pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls, + &descriptor->essence_codec_ul); + st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id; + if (st->codec->pix_fmt == AV_PIX_FMT_NONE) { + /* support files created before RP224v10 by defaulting to UYVY422 + if subsampling is 4:2:2 and component depth is 8-bit */ + if (descriptor->horiz_subsampling == 2 && + descriptor->vert_subsampling == 1 && + descriptor->component_depth == 8) { + st->codec->pix_fmt = AV_PIX_FMT_UYVY422; + } + } + } + } + st->need_parsing = AVSTREAM_PARSE_HEADERS; + } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul); + /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */ + if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE)) + st->codec->codec_id = (enum AVCodecID)container_ul->id; + st->codec->channels = descriptor->channels; + st->codec->bits_per_coded_sample = descriptor->bits_per_sample; + + if (descriptor->sample_rate.den > 0) { + avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num); + st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; + } else { + av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) found for stream #%d, time base forced to 1/48000\n", + descriptor->sample_rate.num, descriptor->sample_rate.den, st->index); + avpriv_set_pts_info(st, 64, 1, 48000); + } + + /* if duration is set, rescale it from EditRate to SampleRate */ + if (st->duration != AV_NOPTS_VALUE) + st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base); + + /* TODO: implement AV_CODEC_ID_RAWAUDIO */ + if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) { + if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) + st->codec->codec_id = AV_CODEC_ID_PCM_S24LE; + else if (descriptor->bits_per_sample == 32) + st->codec->codec_id = AV_CODEC_ID_PCM_S32LE; + } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) { + if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) + st->codec->codec_id = AV_CODEC_ID_PCM_S24BE; + else if (descriptor->bits_per_sample == 32) + st->codec->codec_id = AV_CODEC_ID_PCM_S32BE; + } else if (st->codec->codec_id == AV_CODEC_ID_MP2) { + st->need_parsing = AVSTREAM_PARSE_FULL; + } + } + if (descriptor->extradata) { + st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + if (st->codec->extradata) + memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size); + } else if(st->codec->codec_id == AV_CODEC_ID_H264) { + ff_generate_avci_extradata(st); + } + if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { + /* TODO: decode timestamps */ + st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; + } + } + + ret = 0; +fail_and_free: + return ret; +} + +static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = { + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */ + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext }, + { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment }, + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType }, +}; + +static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type) +{ + AVIOContext *pb = mxf->fc->pb; + MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf; + uint64_t klv_end = avio_tell(pb) + klv->length; + + if (!ctx) + return AVERROR(ENOMEM); + while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) { + int ret; + int tag = avio_rb16(pb); + int size = avio_rb16(pb); /* KLV specified by 0x53 */ + uint64_t next = avio_tell(pb) + size; + UID uid = {0}; + + av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size); + if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */ + av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag); + continue; + } + if (tag > 0x7FFF) { /* dynamic tag */ + int i; + for (i = 0; i < mxf->local_tags_count; i++) { + int local_tag = AV_RB16(mxf->local_tags+i*18); + if (local_tag == tag) { + memcpy(uid, mxf->local_tags+i*18+2, 16); + av_dlog(mxf->fc, "local tag %#04x\n", local_tag); + PRINT_KEY(mxf->fc, "uid", uid); + } + } + } + if (ctx_size && tag == 0x3C0A) + avio_read(pb, ctx->uid, 16); + else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) + return ret; + + /* Accept the 64k local set limit being exceeded (Avid). Don't accept + * it extending past the end of the KLV though (zzuf5.mxf). */ + if (avio_tell(pb) > klv_end) { + if (ctx_size) + av_free(ctx); + + av_log(mxf->fc, AV_LOG_ERROR, + "local tag %#04x extends past end of local set @ %#"PRIx64"\n", + tag, klv->offset); + return AVERROR_INVALIDDATA; + } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */ + avio_seek(pb, next, SEEK_SET); + } + if (ctx_size) ctx->type = type; + return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0; +} + +/** + * Seeks to the previous partition, if possible + * @return <= 0 if we should stop parsing, > 0 if we should keep going + */ +static int mxf_seek_to_previous_partition(MXFContext *mxf) +{ + AVIOContext *pb = mxf->fc->pb; + + if (!mxf->current_partition || + mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell) + return 0; /* we've parsed all partitions */ + + /* seek to previous partition */ + avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET); + mxf->current_partition = NULL; + + av_dlog(mxf->fc, "seeking to previous partition\n"); + + return 1; +} + +/** + * Called when essence is encountered + * @return <= 0 if we should stop parsing, > 0 if we should keep going + */ +static int mxf_parse_handle_essence(MXFContext *mxf) +{ + AVIOContext *pb = mxf->fc->pb; + int64_t ret; + + if (mxf->parsing_backward) { + return mxf_seek_to_previous_partition(mxf); + } else { + if (!mxf->footer_partition) { + av_dlog(mxf->fc, "no footer\n"); + return 0; + } + + av_dlog(mxf->fc, "seeking to footer\n"); + + /* remember where we were so we don't end up seeking further back than this */ + mxf->last_forward_tell = avio_tell(pb); + + if (!pb->seekable) { + av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n"); + return -1; + } + + /* seek to footer partition and parse backward */ + if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) { + av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n", + mxf->run_in + mxf->footer_partition, ret); + return ret; + } + + mxf->current_partition = NULL; + mxf->parsing_backward = 1; + } + + return 1; +} + +/** + * Called when the next partition or EOF is encountered + * @return <= 0 if we should stop parsing, > 0 if we should keep going + */ +static int mxf_parse_handle_partition_or_eof(MXFContext *mxf) +{ + return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1; +} + +/** + * Figures out the proper offset and length of the essence container in each partition + */ +static void mxf_compute_essence_containers(MXFContext *mxf) +{ + int x; + + /* everything is already correct */ + if (mxf->op == OPAtom) + return; + + for (x = 0; x < mxf->partitions_count; x++) { + MXFPartition *p = &mxf->partitions[x]; + + if (!p->body_sid) + continue; /* BodySID == 0 -> no essence */ + + if (x >= mxf->partitions_count - 1) + break; /* last partition - can't compute length (and we don't need to) */ + + /* essence container spans to the next partition */ + p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset; + + if (p->essence_length < 0) { + /* next ThisPartition < essence_offset */ + p->essence_length = 0; + av_log(mxf->fc, AV_LOG_ERROR, + "partition %i: bad ThisPartition = %"PRIX64"\n", + x+1, mxf->partitions[x+1].this_partition); + } + } +} + +static int64_t round_to_kag(int64_t position, int kag_size) +{ + /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */ + /* NOTE: kag_size may be any integer between 1 - 2^10 */ + int64_t ret = (position / kag_size) * kag_size; + return ret == position ? ret : ret + kag_size; +} + +static int is_pcm(enum AVCodecID codec_id) +{ + /* we only care about "normal" PCM codecs until we get samples */ + return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD; +} + +/** + * Deal with the case where for some audio atoms EditUnitByteCount is + * very small (2, 4..). In those cases we should read more than one + * sample per call to mxf_read_packet(). + */ +static void mxf_handle_small_eubc(AVFormatContext *s) +{ + MXFContext *mxf = s->priv_data; + + /* assuming non-OPAtom == frame wrapped + * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */ + if (mxf->op != OPAtom) + return; + + /* expect PCM with exactly one index table segment and a small (< 32) EUBC */ + if (s->nb_streams != 1 || + s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || + !is_pcm(s->streams[0]->codec->codec_id) || + mxf->nb_index_tables != 1 || + mxf->index_tables[0].nb_segments != 1 || + mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32) + return; + + /* arbitrarily default to 48 kHz PAL audio frame size */ + /* TODO: We could compute this from the ratio between the audio + * and video edit rates for 48 kHz NTSC we could use the + * 1802-1802-1802-1802-1801 pattern. */ + mxf->edit_units_per_packet = 1920; +} + +static int mxf_read_header(AVFormatContext *s) +{ + MXFContext *mxf = s->priv_data; + KLVPacket klv; + int64_t essence_offset = 0; + int ret; + + mxf->last_forward_tell = INT64_MAX; + mxf->edit_units_per_packet = 1; + + if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) { + av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n"); + return AVERROR_INVALIDDATA; + } + avio_seek(s->pb, -14, SEEK_CUR); + mxf->fc = s; + mxf->run_in = avio_tell(s->pb); + + while (!url_feof(s->pb)) { + const MXFMetadataReadTableEntry *metadata; + + if (klv_read_packet(&klv, s->pb) < 0) { + /* EOF - seek to previous partition or stop */ + if(mxf_parse_handle_partition_or_eof(mxf) <= 0) + break; + else + continue; + } + + PRINT_KEY(s, "read header", klv.key); + av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset); + if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) || + IS_KLV_KEY(klv.key, mxf_essence_element_key) || + IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) || + IS_KLV_KEY(klv.key, mxf_system_item_key)) { + + if (!mxf->current_partition) { + av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n"); + return AVERROR_INVALIDDATA; + } + + if (!mxf->current_partition->essence_offset) { + /* for OP1a we compute essence_offset + * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25) + * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset + * for OPAtom we still need the actual essence_offset though (the KL's length can vary) + */ + int64_t op1a_essence_offset = + round_to_kag(mxf->current_partition->this_partition + + mxf->current_partition->pack_length, mxf->current_partition->kag_size) + + round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) + + round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size); + + if (mxf->op == OPAtom) { + /* point essence_offset to the actual data + * OPAtom has all the essence in one big KLV + */ + mxf->current_partition->essence_offset = avio_tell(s->pb); + mxf->current_partition->essence_length = klv.length; + } else { + /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */ + mxf->current_partition->essence_offset = op1a_essence_offset; + } + } + + if (!essence_offset) + essence_offset = klv.offset; + + /* seek to footer, previous partition or stop */ + if (mxf_parse_handle_essence(mxf) <= 0) + break; + continue; + } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) && + klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) { + /* next partition pack - keep going, seek to previous partition or stop */ + if(mxf_parse_handle_partition_or_eof(mxf) <= 0) + break; + else if (mxf->parsing_backward) + continue; + /* we're still parsing forward. proceed to parsing this partition pack */ + } + + for (metadata = mxf_metadata_read_table; metadata->read; metadata++) { + if (IS_KLV_KEY(klv.key, metadata->key)) { + int res; + if (klv.key[5] == 0x53) { + res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type); + } else { + uint64_t next = avio_tell(s->pb) + klv.length; + res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset); + + /* only seek forward, else this can loop for a long time */ + if (avio_tell(s->pb) > next) { + av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n", + klv.offset); + return AVERROR_INVALIDDATA; + } + + avio_seek(s->pb, next, SEEK_SET); + } + if (res < 0) { + av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); + return res; + } + break; + } + } + if (!metadata->read) + avio_skip(s->pb, klv.length); + } + /* FIXME avoid seek */ + if (!essence_offset) { + av_log(s, AV_LOG_ERROR, "no essence\n"); + return AVERROR_INVALIDDATA; + } + avio_seek(s->pb, essence_offset, SEEK_SET); + + mxf_compute_essence_containers(mxf); + + /* we need to do this before computing the index tables + * to be able to fill in zero IndexDurations with st->duration */ + if ((ret = mxf_parse_structural_metadata(mxf)) < 0) + goto fail; + + if ((ret = mxf_compute_index_tables(mxf)) < 0) + goto fail; + + if (mxf->nb_index_tables > 1) { + /* TODO: look up which IndexSID to use via EssenceContainerData */ + av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n", + mxf->nb_index_tables, mxf->index_tables[0].index_sid); + } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) { + av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n"); + ret = AVERROR_INVALIDDATA; + goto fail; + } + + mxf_handle_small_eubc(s); + + return 0; +fail: + mxf_read_close(s); + + return ret; +} + +/** + * Sets mxf->current_edit_unit based on what offset we're currently at. + * @return next_ofs if OK, <0 on error + */ +static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset) +{ + int64_t last_ofs = -1, next_ofs = -1; + MXFIndexTable *t = &mxf->index_tables[0]; + + /* this is called from the OP1a demuxing logic, which means there + * may be no index tables */ + if (mxf->nb_index_tables <= 0) + return -1; + + /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */ + while (mxf->current_edit_unit >= 0) { + if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0) + return -1; + + if (next_ofs <= last_ofs) { + /* large next_ofs didn't change or current_edit_unit wrapped + * around this fixes the infinite loop on zzuf3.mxf */ + av_log(mxf->fc, AV_LOG_ERROR, + "next_ofs didn't change. not deriving packet timestamps\n"); + return -1; + } + + if (next_ofs > current_offset) + break; + + last_ofs = next_ofs; + mxf->current_edit_unit++; + } + + /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */ + if (mxf->current_edit_unit < 0) + return -1; + + return next_ofs; +} + +static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count) +{ + int i, total = 0, size = 0; + AVStream *st = mxf->fc->streams[stream_index]; + MXFTrack *track = st->priv_data; + AVRational time_base = av_inv_q(track->edit_rate); + AVRational sample_rate = av_inv_q(st->time_base); + const MXFSamplesPerFrame *spf = NULL; + + if ((sample_rate.num / sample_rate.den) == 48000) + spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base); + if (!spf) { + int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den); + *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1}, + av_mul_q(sample_rate, time_base))); + if (remainder) + av_log(mxf->fc, AV_LOG_WARNING, + "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n", + stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den); + return 0; + } + + while (spf->samples_per_frame[size]) { + total += spf->samples_per_frame[size]; + size++; + } + + av_assert2(size); + + *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total; + for (i = 0; i < mxf->current_edit_unit % size; i++) { + *sample_count += spf->samples_per_frame[i]; + } + + return 0; +} + +static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt) +{ + MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data; + pkt->pts = track->sample_count; + if (codec->channels <= 0 || av_get_bits_per_sample(codec->codec_id) <= 0) + return AVERROR(EINVAL); + track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8); + return 0; +} + +static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt) +{ + KLVPacket klv; + MXFContext *mxf = s->priv_data; + + while (!url_feof(s->pb)) { + int ret; + if (klv_read_packet(&klv, s->pb) < 0) + return -1; + PRINT_KEY(s, "read packet", klv.key); + av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset); + if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { + ret = mxf_decrypt_triplet(s, pkt, &klv); + if (ret < 0) { + av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); + return AVERROR_INVALIDDATA; + } + return 0; + } + if (IS_KLV_KEY(klv.key, mxf_essence_element_key) || + IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) { + int index = mxf_get_stream_index(s, &klv); + int64_t next_ofs, next_klv; + AVStream *st; + MXFTrack *track; + AVCodecContext *codec; + + if (index < 0) { + av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); + goto skip; + } + + st = s->streams[index]; + track = st->priv_data; + + if (s->streams[index]->discard == AVDISCARD_ALL) + goto skip; + + next_klv = avio_tell(s->pb) + klv.length; + next_ofs = mxf_set_current_edit_unit(mxf, klv.offset); + + if (next_ofs >= 0 && next_klv > next_ofs) { + /* if this check is hit then it's possible OPAtom was treated as OP1a + * truncate the packet since it's probably very large (>2 GiB is common) */ + avpriv_request_sample(s, + "OPAtom misinterpreted as OP1a?" + "KLV for edit unit %i extending into " + "next edit unit", + mxf->current_edit_unit); + klv.length = next_ofs - avio_tell(s->pb); + } + + /* check for 8 channels AES3 element */ + if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { + if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) { + av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); + return AVERROR_INVALIDDATA; + } + } else { + ret = av_get_packet(s->pb, pkt, klv.length); + if (ret < 0) + return ret; + } + pkt->stream_index = index; + pkt->pos = klv.offset; + + codec = s->streams[index]->codec; + if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) { + /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */ + MXFIndexTable *t = &mxf->index_tables[0]; + + if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) { + pkt->dts = mxf->current_edit_unit + t->first_dts; + pkt->pts = t->ptses[mxf->current_edit_unit]; + } else if (track->intra_only) { + /* intra-only -> PTS = EditUnit. + * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */ + pkt->pts = mxf->current_edit_unit; + } + } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { + int ret = mxf_set_audio_pts(mxf, codec, pkt); + if (ret < 0) + return ret; + } + + /* seek for truncated packets */ + avio_seek(s->pb, next_klv, SEEK_SET); + + return 0; + } else + skip: + avio_skip(s->pb, klv.length); + } + return AVERROR_EOF; +} + +static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + MXFContext *mxf = s->priv_data; + int ret, size; + int64_t ret64, pos, next_pos; + AVStream *st; + MXFIndexTable *t; + int edit_units; + + if (mxf->op != OPAtom) + return mxf_read_packet_old(s, pkt); + + /* OPAtom - clip wrapped demuxing */ + /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */ + st = s->streams[0]; + t = &mxf->index_tables[0]; + + if (mxf->current_edit_unit >= st->duration) + return AVERROR_EOF; + + edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit); + + if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0) + return ret; + + /* compute size by finding the next edit unit or the end of the essence container + * not pretty, but it works */ + if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 && + (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) { + av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n"); + return AVERROR_INVALIDDATA; + } + + if ((size = next_pos - pos) <= 0) { + av_log(s, AV_LOG_ERROR, "bad size: %i\n", size); + return AVERROR_INVALIDDATA; + } + + if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0) + return ret64; + + if ((size = av_get_packet(s->pb, pkt, size)) < 0) + return size; + + pkt->stream_index = 0; + + if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses && + mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) { + pkt->dts = mxf->current_edit_unit + t->first_dts; + pkt->pts = t->ptses[mxf->current_edit_unit]; + } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + int ret = mxf_set_audio_pts(mxf, st->codec, pkt); + if (ret < 0) + return ret; + } + + mxf->current_edit_unit += edit_units; + + return 0; +} + +static int mxf_read_close(AVFormatContext *s) +{ + MXFContext *mxf = s->priv_data; + MXFIndexTableSegment *seg; + int i; + + av_freep(&mxf->packages_refs); + + for (i = 0; i < s->nb_streams; i++) + s->streams[i]->priv_data = NULL; + + for (i = 0; i < mxf->metadata_sets_count; i++) { + switch (mxf->metadata_sets[i]->type) { + case Descriptor: + av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata); + break; + case MultipleDescriptor: + av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs); + break; + case Sequence: + av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs); + break; + case SourcePackage: + case MaterialPackage: + av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs); + break; + case IndexTableSegment: + seg = (MXFIndexTableSegment *)mxf->metadata_sets[i]; + av_freep(&seg->temporal_offset_entries); + av_freep(&seg->flag_entries); + av_freep(&seg->stream_offset_entries); + break; + default: + break; + } + av_freep(&mxf->metadata_sets[i]); + } + av_freep(&mxf->partitions); + av_freep(&mxf->metadata_sets); + av_freep(&mxf->aesc); + av_freep(&mxf->local_tags); + + if (mxf->index_tables) { + for (i = 0; i < mxf->nb_index_tables; i++) { + av_freep(&mxf->index_tables[i].segments); + av_freep(&mxf->index_tables[i].ptses); + av_freep(&mxf->index_tables[i].fake_index); + } + } + av_freep(&mxf->index_tables); + + return 0; +} + +static int mxf_probe(AVProbeData *p) { + const uint8_t *bufp = p->buf; + const uint8_t *end = p->buf + p->buf_size; + + if (p->buf_size < sizeof(mxf_header_partition_pack_key)) + return 0; + + /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */ + end -= sizeof(mxf_header_partition_pack_key); + for (; bufp < end; bufp++) { + if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key)) + return AVPROBE_SCORE_MAX; + } + return 0; +} + +/* rudimentary byte seek */ +/* XXX: use MXF Index */ +static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) +{ + AVStream *st = s->streams[stream_index]; + int64_t seconds; + MXFContext* mxf = s->priv_data; + int64_t seekpos; + int i, ret; + MXFIndexTable *t; + MXFTrack *source_track = st->priv_data; + + /* if audio then truncate sample_time to EditRate */ + if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) + sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate)); + + if (mxf->nb_index_tables <= 0) { + if (!s->bit_rate) + return AVERROR_INVALIDDATA; + if (sample_time < 0) + sample_time = 0; + seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); + + if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0) + return ret; + ff_update_cur_dts(s, st, sample_time); + } else { + t = &mxf->index_tables[0]; + + /* clamp above zero, else ff_index_search_timestamp() returns negative + * this also means we allow seeking before the start */ + sample_time = FFMAX(sample_time, 0); + + if (t->fake_index) { + /* behave as if we have a proper index */ + if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0) + return sample_time; + } else { + /* no IndexEntryArray (one or more CBR segments) + * make sure we don't seek past the end */ + sample_time = FFMIN(sample_time, source_track->original_duration - 1); + } + + if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0) + return ret; + + ff_update_cur_dts(s, st, sample_time); + mxf->current_edit_unit = sample_time; + avio_seek(s->pb, seekpos, SEEK_SET); + } + + // Update all tracks sample count + for (i = 0; i < s->nb_streams; i++) { + AVStream *cur_st = s->streams[i]; + MXFTrack *cur_track = cur_st->priv_data; + uint64_t current_sample_count = 0; + if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count); + if (ret < 0) + return ret; + + cur_track->sample_count = current_sample_count; + } + } + return 0; +} + +AVInputFormat ff_mxf_demuxer = { + .name = "mxf", + .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"), + .priv_data_size = sizeof(MXFContext), + .read_probe = mxf_probe, + .read_header = mxf_read_header, + .read_packet = mxf_read_packet, + .read_close = mxf_read_close, + .read_seek = mxf_read_seek, +}; |