diff options
Diffstat (limited to 'libavformat/mxfdec.c')
| -rw-r--r-- | libavformat/mxfdec.c | 1016 |
1 files changed, 962 insertions, 54 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 2a455d7d51..17eadbfd77 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -2,20 +2,20 @@ * MXF demuxer. * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -52,6 +52,42 @@ #include "internal.h" #include "mxf.h" +typedef enum { + Header, + BodyPartition, + Footer +} MXFPartitionType; + +typedef enum { + OP1a, + 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; @@ -109,6 +145,21 @@ typedef struct { typedef struct { UID uid; enum MXFMetadataSetType type; + int edit_unit_byte_count; + int index_sid; + int body_sid; + int slice_count; + AVRational index_edit_rate; + uint64_t index_start_position; + uint64_t index_duration; + int *slice; + int *element_delta; + int nb_delta_entries; + int8_t *temporal_offset_entries; + int *flag_entries; + uint64_t *stream_offset_entries; + uint32_t **slice_offset_entries; + int nb_index_entries; } MXFIndexTableSegment; typedef struct { @@ -127,6 +178,9 @@ typedef struct { } MXFMetadataSet; typedef struct { + MXFPartition *partitions; + unsigned partitions_count; + MXFOP op; UID *packages_refs; int packages_count; MXFMetadataSet **metadata_sets; @@ -135,6 +189,21 @@ typedef struct { 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 current_stream; + int d10; + int broken_index; + int64_t first_dts; /* DTS = EditUnit + first_dts */ + int64_t *ptses; /* maps EditUnit -> PTS */ + int nb_ptses; } MXFContext; enum MXFWrappingScheme { @@ -142,7 +211,8 @@ enum MXFWrappingScheme { Clip, }; -typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid); +/* 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; @@ -154,6 +224,8 @@ typedef struct { /* 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 }; @@ -181,7 +253,7 @@ static int64_t klv_decode_ber_length(AVIOContext *pb) static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size) { int i, b; - for (i = 0; i < size && !pb->eof_reached; i++) { + for (i = 0; i < size && !url_feof(pb); i++) { b = avio_r8(pb); if (b == key[0]) i = 0; @@ -308,11 +380,11 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv return 0; } -static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) +static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt) { KLVPacket klv; - while (!s->pb->eof_reached) { + while (!url_feof(s->pb)) { if (klv_read_packet(&klv, s->pb) < 0) return -1; PRINT_KEY(s, "read packet", klv.key); @@ -325,7 +397,8 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) } return 0; } - if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { + 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); if (index < 0) { av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); @@ -354,7 +427,71 @@ static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) return AVERROR_EOF; } -static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid) +static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + MXFContext *mxf = s->priv_data; + AVIndexEntry *e; + int ret; + int64_t ret64; + KLVPacket klv; + AVStream *st; + + /* TODO: better logic for this? + * only files that lack all index segments prior to the essence need this */ + if (!s->pb->seekable && mxf->op != OPAtom || mxf->d10 || mxf->broken_index) + return mxf_read_packet_old(s, pkt); + + if (mxf->current_stream >= s->nb_streams) { + mxf->current_edit_unit++; + mxf->current_stream = 0; + } + + st = s->streams[mxf->current_stream]; + + if (mxf->current_edit_unit >= st->nb_index_entries) + return AVERROR_EOF; + + e = &st->index_entries[mxf->current_edit_unit]; + + if ((ret64 = avio_seek(s->pb, e->pos, SEEK_SET)) < 0) + return ret64; + + if (mxf->op == OPAtom) { + /* OPAtom - no KL, just essence */ + if ((ret = av_get_packet(s->pb, pkt, e->size)) != e->size) + return ret < 0 ? ret : AVERROR_EOF; + } else { + /* read KL, read L bytes of essence */ + if ((ret = klv_read_packet(&klv, s->pb)) < 0) + return ret; + + /* untested, but looks OK */ + if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { + int res = mxf_decrypt_triplet(s, pkt, &klv); + if (res < 0) { + av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); + return -1; + } + return 0; + } + + if ((ret = av_get_packet(s->pb, pkt, klv.length)) != klv.length) + return ret < 0 ? ret : AVERROR_EOF; + + pkt->pos = e->pos; + } + + if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && mxf->ptses && mxf->current_edit_unit < mxf->nb_ptses) { + pkt->dts = mxf->current_edit_unit + mxf->first_dts; + pkt->pts = mxf->ptses[mxf->current_edit_unit]; + } + + pkt->stream_index = mxf->current_stream++; + + 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); @@ -374,6 +511,112 @@ static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, U 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; + UID op; + uint64_t footer_partition; + + if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions)) + return AVERROR(ENOMEM); + + mxf->partitions = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions)); + if (!mxf->partitions) + return AVERROR(ENOMEM); + + 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)); + + /* 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: %li != %li\n", + mxf->footer_partition, footer_partition); + } else { + mxf->footer_partition = footer_partition; + } + } + + av_dlog(mxf->fc, "PartitionPack: ThisPartition = 0x%lx, PreviousPartition = 0x%lx, " + "FooterPartition = 0x%lx, IndexSID = %i, BodySID = %i\n", + partition->this_partition, + partition->previous_partition, footer_partition, + partition->index_sid, partition->body_sid); + + 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] == 0x10) mxf->op = OPAtom; + else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt; + 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) { if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets)) @@ -386,7 +629,7 @@ static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) return 0; } -static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid) +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) @@ -396,7 +639,7 @@ static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, i return 0; } -static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid) +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) { @@ -414,7 +657,7 @@ static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int siz return 0; } -static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid) +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) { @@ -436,7 +679,7 @@ static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, U return 0; } -static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid) +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) { @@ -454,7 +697,7 @@ static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int si return 0; } -static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid) +static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) { MXFTrack *track = arg; switch(tag) { @@ -475,7 +718,7 @@ static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid return 0; } -static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid) +static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) { MXFSequence *sequence = arg; switch(tag) { @@ -499,7 +742,7 @@ static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID return 0; } -static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid) +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) { @@ -525,15 +768,99 @@ static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size return 0; } -static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid) +static int mxf_read_delta_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment) { + int i, length; + + segment->nb_delta_entries = avio_rb32(pb); + length = avio_rb32(pb); + + if (!(segment->slice = av_calloc(segment->nb_delta_entries, sizeof(*segment->slice))) || + !(segment->element_delta = av_calloc(segment->nb_delta_entries, sizeof(*segment->element_delta)))) + return AVERROR(ENOMEM); + + for (i = 0; i < segment->nb_delta_entries; i++) { + avio_r8(pb); /* PosTableIndex */ + segment->slice[i] = avio_r8(pb); + segment->element_delta[i] = avio_rb32(pb); + } + return 0; +} + +static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment) +{ + int i, j, 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); + + if (segment->slice_count && + !(segment->slice_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->slice_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); + if (segment->slice_count) { + if (!(segment->slice_offset_entries[i] = av_calloc(segment->slice_count, sizeof(**segment->slice_offset_entries)))) + return AVERROR(ENOMEM); + + for (j = 0; j < segment->slice_count; j++) + segment->slice_offset_entries[i][j] = avio_rb32(pb); + } + + avio_skip(pb, length - 11 - 4 * segment->slice_count); + } + 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: av_dlog(NULL, "EditUnitByteCount %d\n", avio_rb32(pb)); break; - case 0x3F06: av_dlog(NULL, "IndexSID %d\n", avio_rb32(pb)); break; - case 0x3F07: av_dlog(NULL, "BodySID %d\n", avio_rb32(pb)); break; - case 0x3F0B: av_dlog(NULL, "IndexEditRate %d/%d\n", avio_rb32(pb), avio_rb32(pb)); break; - case 0x3F0C: av_dlog(NULL, "IndexStartPosition %"PRIu64"\n", avio_rb64(pb)); break; - case 0x3F0D: av_dlog(NULL, "IndexDuration %"PRIu64"\n", avio_rb64(pb)); break; + 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 0x3F08: + segment->slice_count = avio_r8(pb); + av_dlog(NULL, "SliceCount %d\n", segment->slice_count); + break; + case 0x3F09: + av_dlog(NULL, "DeltaEntryArray found\n"); + return mxf_read_delta_entry_array(pb, segment); + 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; } @@ -557,7 +884,7 @@ static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor) 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) +static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset) { MXFDescriptor *descriptor = arg; switch(tag) { @@ -659,22 +986,348 @@ static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMe return NULL; } -static const MXFCodecUL mxf_essence_container_uls[] = { +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, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ + { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 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, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */ + { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, 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, CODEC_ID_NONE }, }; +static UID mxf_d10_ul = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }; + +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 (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) || + !(*sorted_segments = av_calloc(nb_segments, sizeof(**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; + + 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 ((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)) { + best = j; + best_body_sid = s->body_sid; + best_index_sid = s->index_sid; + best_index_start = s->index_start_position; + } + } + + /* 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 %lx in BodySID %i - partial file?\n", + offset_in, body_sid); + + return AVERROR_INVALIDDATA; +} + +/** + * Returns the length of the essence container with given BodySID, or zero if unknown + */ +static int64_t mxf_essence_container_length(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_length; + } + + return ret; +} + +static int mxf_parse_index(MXFContext *mxf, int track_id, AVStream *st, MXFIndexTableSegment **sorted_segments, int nb_sorted_segments) +{ + int64_t accumulated_offset = 0; + int j, k, l, ret; + int n_delta = track_id - 1; /* TrackID = 1-based stream index */ + + if (track_id < 1) { + av_log(mxf->fc, AV_LOG_ERROR, "TrackID not positive: %i\n", track_id); + return AVERROR_INVALIDDATA; + } + + for (j = 0; j < nb_sorted_segments; j++) { + int duration, sample_duration = 1, last_sample_size = 0; + int64_t segment_size; + MXFIndexTableSegment *tableseg = sorted_segments[j]; + int index_delta = 1, last_size_unknown = 0; + int64_t last_pos = 0; + + /* reset accumulated_offset on BodySID change */ + if (j > 0 && tableseg->body_sid != sorted_segments[j-1]->body_sid) + accumulated_offset = 0; + + if (tableseg->nb_index_entries == 2 * tableseg->index_duration + 1) { + /* Avid index - duplicate entries and total size as last entry */ + index_delta = 2; + } + + if (n_delta >= tableseg->nb_delta_entries && st->index != 0) + continue; + duration = tableseg->index_duration > 0 ? tableseg->index_duration : + st->duration - st->nb_index_entries; + segment_size = tableseg->edit_unit_byte_count * duration; + /* check small EditUnitByteCount for audio */ + if (tableseg->edit_unit_byte_count && tableseg->edit_unit_byte_count < 32 + && !tableseg->index_duration) { + /* duration might be prime relative to the new sample_duration, + * which means we need to handle the last frame differently */ + sample_duration = 8192; + last_sample_size = (duration % sample_duration) * tableseg->edit_unit_byte_count; + tableseg->edit_unit_byte_count *= sample_duration; + duration /= sample_duration; + if (last_sample_size) duration++; + } + + if (duration <= 0) { + av_log(mxf->fc, AV_LOG_WARNING, "0 duration in index for stream %i\n", st->index); + mxf->broken_index = 1; + return 0; + } + + for (k = l = 0; k < duration; k++, l += index_delta) { + int64_t pos; + int size, flags = 0; + + if (l < tableseg->nb_index_entries) { + pos = tableseg->stream_offset_entries[l]; + if (n_delta < tableseg->nb_delta_entries) { + if (n_delta < tableseg->nb_delta_entries - 1) { + size = + tableseg->slice_offset_entries[l][tableseg->slice[n_delta+1]-1] + + tableseg->element_delta[n_delta+1] - + tableseg->element_delta[n_delta]; + if (tableseg->slice[n_delta] > 0) + size -= tableseg->slice_offset_entries[l][tableseg->slice[n_delta]-1]; + } else if (l < tableseg->nb_index_entries - 1) { + size = tableseg->stream_offset_entries[l+1] - + tableseg->stream_offset_entries[l] - + tableseg->slice_offset_entries[l][tableseg->slice[tableseg->nb_delta_entries-1]-1] - + tableseg->element_delta[tableseg->nb_delta_entries-1]; + } else + size = 0; + if (tableseg->slice[n_delta] > 0) + pos += tableseg->slice_offset_entries[l][tableseg->slice[n_delta]-1]; + pos += tableseg->element_delta[n_delta]; + } else + size = 0; + flags = !(tableseg->flag_entries[l] & 0x30) ? AVINDEX_KEYFRAME : 0; + } else { + pos = (int64_t)k * tableseg->edit_unit_byte_count + accumulated_offset; + if (n_delta < tableseg->nb_delta_entries - 1) + size = tableseg->element_delta[n_delta+1] - tableseg->element_delta[n_delta]; + else { + /* use smaller size for last sample if we should */ + if (last_sample_size && k == duration - 1) + size = last_sample_size; + else + size = tableseg->edit_unit_byte_count; + if (tableseg->nb_delta_entries) + size -= tableseg->element_delta[tableseg->nb_delta_entries-1]; + } + if (n_delta < tableseg->nb_delta_entries) + pos += tableseg->element_delta[n_delta]; + flags = AVINDEX_KEYFRAME; + } + + if (last_size_unknown) + st->index_entries[st->nb_index_entries-1].size = pos - last_pos; + + last_size_unknown = size == 0; + last_pos = pos; + + if (mxf_absolute_bodysid_offset(mxf, tableseg->body_sid, pos, &pos) < 0) { + /* probably partial file - no point going further for this stream */ + break; + } + + av_dlog(mxf->fc, "Stream %d IndexEntry %d TrackID %d Offset %"PRIx64" Timestamp %"PRId64"\n", + st->index, st->nb_index_entries, track_id, pos, sample_duration * st->nb_index_entries); + + if ((ret = av_add_index_entry(st, pos, sample_duration * st->nb_index_entries, size, 0, flags)) < 0) + return ret; + } + + if (last_size_unknown) { + int64_t ecl = mxf_essence_container_length(mxf, tableseg->body_sid); + + if (ecl > 0) + st->index_entries[st->nb_index_entries-1].size = ecl - last_pos; + } + + accumulated_offset += segment_size; + } + + return 0; +} + +static int mxf_compute_ptses(MXFContext *mxf, MXFIndexTableSegment **sorted_segments, int nb_sorted_segments) +{ + int ret, i, j, x; + int8_t max_temporal_offset = -128; + + /* first compute how many entries we have */ + for (i = 0; i < nb_sorted_segments; i++) { + MXFIndexTableSegment *s = sorted_segments[i]; + + if (!s->nb_index_entries) + return 0; /* no TemporalOffsets */ + + if (s->nb_index_entries == 2 * s->index_duration + 1) + mxf->nb_ptses += s->index_duration; /* Avid index */ + else + mxf->nb_ptses += s->nb_index_entries; + } + + /* paranoid check */ + if (mxf->nb_ptses <= 0) + return 0; + + if (!(mxf->ptses = av_calloc(mxf->nb_ptses, sizeof(int64_t)))) + 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 < mxf->nb_ptses; x++) + mxf->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 < nb_sorted_segments; i++) { + MXFIndexTableSegment *s = sorted_segments[i]; + int index_delta = 1; + + if (s->nb_index_entries == 2 * s->index_duration + 1) + index_delta = 2; /* Avid index */ + + for (j = 0; j < s->nb_index_entries; j += index_delta, x++) { + int offset = s->temporal_offset_entries[j] / index_delta; + int index = x + offset; + + if (index < 0 || index >= mxf->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; + } + + mxf->ptses[index] = x; + max_temporal_offset = FFMAX(max_temporal_offset, offset); + } + } + + mxf->first_dts = -max_temporal_offset; + + return 0; +} + static int mxf_parse_structural_metadata(MXFContext *mxf) { MXFPackage *material_package = NULL; MXFPackage *temp_package = NULL; - int i, j, k; + int i, j, k, ret, nb_sorted_segments; + MXFIndexTableSegment **sorted_segments = NULL; av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count); /* TODO: handle multiple material packages (OP3x) */ @@ -687,6 +1340,12 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) return -1; } + 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"); + mxf->broken_index = 1; + } + for (i = 0; i < material_package->tracks_count; i++) { MXFPackage *source_package = NULL; MXFTrack *material_track = NULL; @@ -726,13 +1385,14 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) } } if (!source_package) { - av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id); + 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"); - return -1; + ret = -1; + goto fail_and_free; } if (temp_track->track_id == component->source_track_id) { source_track = temp_track; @@ -747,10 +1407,24 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) if (!source_track) 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 = -1; + 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"); - return -1; + ret = AVERROR(ENOMEM); + goto fail_and_free; } st->id = source_track->track_id; st->priv_data = source_track; @@ -760,11 +1434,6 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) st->start_time = component->start_position; avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den); - if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) { - av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n"); - return -1; - } - PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul); codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul); st->codec->codec_type = codec_ul->id; @@ -806,6 +1475,11 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) } } } + + /* HACK: revert to the old demuxing/seeking scode for D-10 for now */ + if (mxf_match_uid(essence_container_ul, mxf_d10_ul, 14)) + mxf->d10 = 1; + /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */ codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul); st->codec->codec_id = codec_ul->id; @@ -814,7 +1488,7 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) st->codec->extradata_size = descriptor->extradata_size; } if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { - container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); + container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul); if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = container_ul->id; st->codec->width = descriptor->width; @@ -823,7 +1497,7 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) st->codec->pix_fmt = descriptor->pix_fmt; st->need_parsing = AVSTREAM_PARSE_HEADERS; } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { - container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); + container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul); if (st->codec->codec_id == CODEC_ID_NONE) st->codec->codec_id = container_ul->id; st->codec->channels = descriptor->channels; @@ -831,12 +1505,12 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; /* TODO: implement CODEC_ID_RAWAUDIO */ if (st->codec->codec_id == CODEC_ID_PCM_S16LE) { - if (descriptor->bits_per_sample == 24) + if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) st->codec->codec_id = CODEC_ID_PCM_S24LE; else if (descriptor->bits_per_sample == 32) st->codec->codec_id = CODEC_ID_PCM_S32LE; } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) { - if (descriptor->bits_per_sample == 24) + if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24) st->codec->codec_id = CODEC_ID_PCM_S24BE; else if (descriptor->bits_per_sample == 32) st->codec->codec_id = CODEC_ID_PCM_S32BE; @@ -845,15 +1519,34 @@ static int mxf_parse_structural_metadata(MXFContext *mxf) } } if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { - av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n"); - st->need_parsing = AVSTREAM_PARSE_FULL; + /* TODO: decode timestamps */ + st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; } + + if (!mxf->broken_index && + (ret = mxf_parse_index(mxf, material_track->track_id, st, sorted_segments, nb_sorted_segments))) + goto fail_and_free; } - return 0; + + ret = mxf_compute_ptses(mxf, sorted_segments, nb_sorted_segments); + +fail_and_free: + av_free(sorted_segments); + 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 }, @@ -905,7 +1598,7 @@ static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadF } if (ctx_size && tag == 0x3C0A) avio_read(pb, ctx->uid, 16); - else if (read_child(ctx, pb, tag, size, uid) < 0) + else if (read_child(ctx, pb, tag, size, uid, -1) < 0) return -1; avio_seek(pb, next, SEEK_SET); @@ -914,10 +1607,129 @@ static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadF 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->current_partition) { + av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to PartitionPack\n"); + return AVERROR_INVALIDDATA; + } + + 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 = %lx\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 mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) { MXFContext *mxf = s->priv_data; KLVPacket klv; + int64_t essence_offset = 0; + + mxf->last_forward_tell = INT64_MAX; 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"); @@ -925,18 +1737,61 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) } avio_seek(s->pb, -14, SEEK_CUR); mxf->fc = s; - while (!s->pb->eof_reached) { + mxf->run_in = avio_tell(s->pb); + + while (!url_feof(s->pb)) { const MXFMetadataReadTableEntry *metadata; - if (klv_read_packet(&klv, s->pb) < 0) - return -1; + 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)) { - /* FIXME avoid seek */ - avio_seek(s->pb, klv.offset, SEEK_SET); - break; + 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->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; } for (metadata = mxf_metadata_read_table; metadata->read; metadata++) { @@ -944,8 +1799,11 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) int res; if (klv.key[5] == 0x53) { res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type); - } else - res = metadata->read(mxf, s->pb, 0, 0, NULL); + } else { + uint64_t next = avio_tell(s->pb) + klv.length; + res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset); + avio_seek(s->pb, next, SEEK_SET); + } if (res < 0) { av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); return -1; @@ -956,13 +1814,23 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) 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); + return mxf_parse_structural_metadata(mxf); } static int mxf_read_close(AVFormatContext *s) { MXFContext *mxf = s->priv_data; - int i; + MXFIndexTableSegment *seg; + int i, j; av_freep(&mxf->packages_refs); @@ -981,14 +1849,28 @@ static int mxf_read_close(AVFormatContext *s) case MaterialPackage: av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs); break; + case IndexTableSegment: + seg = (MXFIndexTableSegment *)mxf->metadata_sets[i]; + if (seg->slice_count) + for (j = 0; j < seg->nb_index_entries; j++) + av_freep(&seg->slice_offset_entries[j]); + av_freep(&seg->slice); + av_freep(&seg->element_delta); + av_freep(&seg->temporal_offset_entries); + av_freep(&seg->flag_entries); + av_freep(&seg->stream_offset_entries); + av_freep(&seg->slice_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); + av_freep(&mxf->ptses); return 0; } @@ -1014,14 +1896,40 @@ static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti { AVStream *st = s->streams[stream_index]; int64_t seconds; + MXFContext* mxf = s->priv_data; + int64_t seekpos; + int index; + if (mxf->d10) { if (!s->bit_rate) return -1; if (sample_time < 0) sample_time = 0; seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); - avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET); + if (avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET) < 0) + return -1; ff_update_cur_dts(s, st, sample_time); + } else { + if (st->nb_index_entries <= 0) + return -1; + + index = av_index_search_timestamp(st, sample_time, flags); + + av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, sample_time, index); + + if (index < 0) { + if (sample_time < st->index_entries[0].timestamp) + index = 0; + else + return -1; + } + + seekpos = st->index_entries[index].pos; + av_update_cur_dts(s, st, st->index_entries[index].timestamp); + mxf->current_edit_unit = st->index_entries[index].timestamp; + mxf->current_stream = 0; + avio_seek(s->pb, seekpos, SEEK_SET); + } return 0; } |