364     IMFVirtualTrackResourcePlaybackCtx *track_resource = track->resources + resource_index;  in open_track_resource_context()  local
366     if (track_resource->ctx) {  in open_track_resource_context()
368                track_resource->locator->absolute_uri);  in open_track_resource_context()
372     track_resource->ctx = avformat_alloc_context();  in open_track_resource_context()
373     if (!track_resource->ctx)  in open_track_resource_context()
376     track_resource->ctx->io_open = s->io_open;  in open_track_resource_context()
377     track_resource->ctx->io_close = s->io_close;  in open_track_resource_context()
378     track_resource->ctx->io_close2 = s->io_close2;  in open_track_resource_context()
379     track_resource->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;  in open_track_resource_context()
381     if ((ret = ff_copy_whiteblacklists(track_resource->ctx, s)) < 0)  in open_track_resource_context()
384     if ((ret = av_opt_set(track_resource->ctx, "format_whitelist", "mxf", 0)))  in open_track_resource_context()
390     ret = avformat_open_input(&track_resource->ctx,  in open_track_resource_context()
391                               track_resource->locator->absolute_uri,  in open_track_resource_context()
396                track_resource->locator->absolute_uri, av_err2str(ret));  in open_track_resource_context()
403     if (track_resource->ctx->nb_streams != 1) {  in open_track_resource_context()
408     st = track_resource->ctx->streams[0];  in open_track_resource_context()
415                        av_sub_q(track->current_timestamp, track_resource->ts_offset),  in open_track_resource_context()
423                track_resource->locator->absolute_uri, seek_offset);  in open_track_resource_context()
424         ret = avformat_seek_file(track_resource->ctx, 0, seek_offset, seek_offset, seek_offset, 0);  in open_track_resource_context()
430                    track_resource->locator->absolute_uri,  in open_track_resource_context()
432             avformat_close_input(&track_resource->ctx);  in open_track_resource_context()
441     avformat_free_context(track_resource->ctx);  in open_track_resource_context()
442     track_resource->ctx = NULL;  in open_track_resource_context()