diff options
| -rw-r--r-- | libavformat/mxfdec.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 646a3ea636..b892bc2911 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -2461,6 +2461,64 @@ static void mxf_handle_small_eubc(AVFormatContext *s) mxf->edit_units_per_packet = 1920; } +/** + * Deal with the case where OPAtom files does not have any IndexTableSegments. + */ +static int mxf_handle_missing_index_segment(MXFContext *mxf) +{ + AVFormatContext *s = mxf->fc; + AVStream *st = NULL; + MXFIndexTableSegment *segment = NULL; + MXFPartition *p = NULL; + int essence_partition_count = 0; + int i, ret; + + if (mxf->op != OPAtom) + return 0; + + /* TODO: support raw video without a index if they exist */ + if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id)) + return 0; + + /* check if file already has a IndexTableSegment */ + for (i = 0; i < mxf->metadata_sets_count; i++) { + if (mxf->metadata_sets[i]->type == IndexTableSegment) + return 0; + } + + /* find the essence partition */ + for (i = 0; i < mxf->partitions_count; i++) { + /* BodySID == 0 -> no essence */ + if (!mxf->partitions[i].body_sid) + continue; + + p = &mxf->partitions[i]; + essence_partition_count++; + } + + /* only handle files with a single essence partition */ + if (essence_partition_count != 1) + return 0; + + if (!(segment = av_mallocz(sizeof(*segment)))) + return AVERROR(ENOMEM); + + if ((ret = mxf_add_metadata_set(mxf, segment))) { + mxf_free_metadataset((MXFMetadataSet**)&segment); + return ret; + } + + st = s->streams[0]; + segment->type = IndexTableSegment; + /* stream will be treated as small EditUnitByteCount */ + segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3; + segment->index_start_position = 0; + segment->index_duration = s->streams[0]->duration; + segment->index_sid = p->index_sid; + segment->body_sid = p->body_sid; + return 0; +} + static void mxf_read_random_index_pack(AVFormatContext *s) { MXFContext *mxf = s->priv_data; @@ -2623,6 +2681,7 @@ static int mxf_read_header(AVFormatContext *s) if ((ret = mxf_parse_structural_metadata(mxf)) < 0) goto fail; + mxf_handle_missing_index_segment(mxf); if ((ret = mxf_compute_index_tables(mxf)) < 0) goto fail; |