PERSPECTIVE_SENSE_SOURCE 83 libavfilter/vf_perspective.c { "sense", "specify the sense of the coordinates", OFFSET(sense), AV_OPT_TYPE_INT, {.i64=PERSPECTIVE_SENSE_SOURCE}, 0, 1, FLAGS, "sense"}, PERSPECTIVE_SENSE_SOURCE 85 libavfilter/vf_perspective.c 0, AV_OPT_TYPE_CONST, {.i64=PERSPECTIVE_SENSE_SOURCE}, 0, 0, FLAGS, "sense"}, PERSPECTIVE_SENSE_SOURCE 160 libavfilter/vf_perspective.c case PERSPECTIVE_SENSE_SOURCE: