diff options
Diffstat (limited to 'ffmpeg/libavformat/mxfdec.c')
| -rw-r--r-- | ffmpeg/libavformat/mxfdec.c | 2559 |
1 files changed, 0 insertions, 2559 deletions
diff --git a/ffmpeg/libavformat/mxfdec.c b/ffmpeg/libavformat/mxfdec.c deleted file mode 100644 index 61c0cb2..0000000 --- a/ffmpeg/libavformat/mxfdec.c +++ /dev/null @@ -1,2559 +0,0 @@ -/* - * 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 - */ - -#include <stdint.h> - -#include "libavutil/aes.h" -#include "libavutil/avassert.h" -#include "libavutil/mathematics.h" -#include "libavcodec/bytestream.h" -#include "libavutil/intreadwrite.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 last_partition; - 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_random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 }; -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; - - tmp_part = av_realloc_array(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; - - tmp = av_realloc_array(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 */ - { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */ - { { 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) { - st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; - avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num); - } 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) { - if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) { - memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size); - } - } else if (st->codec->codec_id == AV_CODEC_ID_H264) { - ret = ff_generate_avci_extradata(st); - if (ret < 0) - return ret; - } - 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 int mxf_read_utf16_string(AVIOContext *pb, int size, char** str) -{ - int ret; - size_t buf_size; - - if (size < 0) - return AVERROR(EINVAL); - - buf_size = size + size/2 + 1; - *str = av_malloc(buf_size); - if (!*str) - return AVERROR(ENOMEM); - - if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) { - av_freep(str); - return ret; - } - - return ret; -} - -static int mxf_uid_to_str(UID uid, char **str) -{ - int i; - char *p; - p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1); - if (!p) - return AVERROR(ENOMEM); - for (i = 0; i < sizeof(UID); i++) { - snprintf(p, 2 + 1, "%.2x", uid[i]); - p += 2; - if (i == 3 || i == 5 || i == 7 || i == 9) { - snprintf(p, 1 + 1, "-"); - p++; - } - } - return 0; -} - -static int mxf_timestamp_to_str(uint64_t timestamp, char **str) -{ - struct tm time = {0}; - time.tm_year = (timestamp >> 48) - 1900; - time.tm_mon = (timestamp >> 40 & 0xFF) - 1; - time.tm_mday = (timestamp >> 32 & 0xFF); - time.tm_hour = (timestamp >> 24 & 0xFF); - time.tm_min = (timestamp >> 16 & 0xFF); - time.tm_sec = (timestamp >> 8 & 0xFF); - - /* ensure month/day are valid */ - time.tm_mon = FFMAX(time.tm_mon, 0); - time.tm_mday = FFMAX(time.tm_mday, 1); - - *str = av_mallocz(32); - if (!*str) - return AVERROR(ENOMEM); - strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time); - - return 0; -} - -#define SET_STR_METADATA(pb, name, str) do { \ - if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \ - return ret; \ - av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \ -} while (0) - -#define SET_UID_METADATA(pb, name, var, str) do { \ - avio_read(pb, var, 16); \ - if ((ret = mxf_uid_to_str(var, &str)) < 0) \ - return ret; \ - av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \ -} while (0) - -#define SET_TS_METADATA(pb, name, var, str) do { \ - var = avio_rb64(pb); \ - if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \ - return ret; \ - av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \ -} while (0) - -static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset) -{ - MXFContext *mxf = arg; - AVFormatContext *s = mxf->fc; - int ret; - UID uid = { 0 }; - char *str = NULL; - uint64_t ts; - switch (tag) { - case 0x3C01: - SET_STR_METADATA(pb, "company_name", str); - break; - case 0x3C02: - SET_STR_METADATA(pb, "product_name", str); - break; - case 0x3C04: - SET_STR_METADATA(pb, "product_version", str); - break; - case 0x3C05: - SET_UID_METADATA(pb, "product_uid", uid, str); - break; - case 0x3C06: - SET_TS_METADATA(pb, "modification_date", ts, str); - break; - case 0x3C08: - SET_STR_METADATA(pb, "application_platform", str); - break; - case 0x3C09: - SET_UID_METADATA(pb, "generation_uid", uid, str); - break; - case 0x3C0A: - SET_UID_METADATA(pb, "uid", uid, str); - break; - } - 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,0x34,0x02,0x05,0x01,0x01,0x0d,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,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata }, - { { 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 || mxf->last_partition){ - uint64_t offset; - - offset = mxf->footer_partition ? mxf->footer_partition : mxf->last_partition; - - av_dlog(mxf->fc, "seeking to last partition\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 last partition\n"); - return -1; - } - - /* seek to last partition and parse backward */ - if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) { - av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to last partition @ 0x%"PRIx64" (%"PRId64") - partial file?\n", - mxf->run_in + offset, ret); - return ret; - } - - mxf->current_partition = NULL; - mxf->parsing_backward = 1; - } else { - av_dlog(mxf->fc, "can't find last partition\n"); - return 0; - } - - 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 void mxf_read_random_index_pack(AVFormatContext *s) -{ - MXFContext *mxf = s->priv_data; - uint32_t length; - int64_t file_size; - KLVPacket klv; - - if (!s->pb->seekable) - return; - - file_size = avio_size(s->pb); - avio_seek(s->pb, file_size - 4, SEEK_SET); - length = avio_rb32(s->pb); - if (length <= 32 || length >= FFMIN(file_size, INT_MAX)) - goto end; - avio_seek(s->pb, file_size - length, SEEK_SET); - if (klv_read_packet(&klv, s->pb) < 0 || - !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) || - klv.length != length - 20) - goto end; - - avio_skip(s->pb, klv.length - 12); - mxf->last_partition = avio_rb64(s->pb); - -end: - avio_seek(s->pb, mxf->run_in, SEEK_SET); -} - -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); - - mxf_read_random_index_pack(s); - - 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 - || codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8) - 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 (klv_read_packet(&klv, s->pb) == 0) { - int ret; - 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 url_feof(s->pb) ? AVERROR_EOF : -1; -} - -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;) { - if (!((bufp[13] - 1) & 0xF2)){ - if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) && - AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) && - AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) && - AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12)) - return AVPROBE_SCORE_MAX; - bufp ++; - } else - bufp += 10; - } - - 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; - int64_t ret64; - 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 ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0) - return ret64; - ff_update_cur_dts(s, st, sample_time); - mxf->current_edit_unit = 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, -}; 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